News

Advantages and points for attention in economical CNC lathe processing

The economic NC machine tool is a simple numerical control machine. The NC machining control program needs to be compiled according to the contour line of the wheel profile. It can not only meet the technical requirements of the drawing, but also the production cost is low. Therefore, it is necessary to reformulate a reasonable processing route according to the structural characteristics of the machine tool, and to design the fixture, tool and process program adapted to it. The special fixture designed must satisfy the established processing route and be able to automatically centering to reduce the auxiliary time needed in the whole process. The following is a brief introduction of the advantages and attentions of the economic lathe.

T01b2521f18d6b67df8

First, the advantages of economic machine tool processing
(1) the holes and grooves on the axis of the two pairs of claw are evenly spaced, and the rotation working table should be used on the boring machine to divide the wheel in one time, so that the wheel load is balanced and the clamping is reliable.
(2) the axis diameter required for the wheel processing should be determined by the diameter of the inner hole that needs the machining wheel, and the two pairs of claw which match the inner hole size should be selected, and the claw is installed on the actual machining position, the top wire is fixed on the axis and the other end of the claw is turned into the inner hole of the wheel on the machine tool. The size is fitted to fit the wheels easily, and the clamping force of the clamp is large enough.
(3) in order to ensure that the whole fixture has sufficient rigidity and interchangeability, the mandrel and the base should be threaded and the large pitch trapezoidal thread should be used. The economic CNC machine tool is a CNC machine tool and the servo feed system under control. It can make the tool move in the space according to any given trajectory. In the process of the execution of the control program, the tool path does not change because the blade is transposition and the new blade is replaced. The tip position change should be small enough. Therefore, it is necessary to use interchangeable cutting tools.

Two. Attention to the processing of economic lathe
(1) to avoid the curvature interference between the tool and the wheel profile, the radius of curvature of the tool must be less than the curvature radius of each part of the wheel.
(2) the profile of the wheel often has edges and corners, and the coordinates of the tool center should be offset.
(3) knife complement is the same point, a certain number knife relative to the reference knife in two aspects of the deviation, the reference knife does not have a knife to fill, if set up a knife supplement is also convenient for self tuning.
(4) the temperature of the general workpiece will rise quickly in the process of the lathe processing, and the special cutting oil must be used to cool the workpiece. Otherwise, the precision of the workpiece will be reduced and the precision of the tool will be reduced, so a large amount of cost will be put into the tool.
(5) the origin of the program can be any point on the standard axis, but in order to facilitate programming and tool setting, the center of rotation of the right end of the wheel is often selected at the origin of the program.
(6) the tool point is also arbitrary, but in order to reduce the tool space and increase the productivity, the position of the wheel is generally chosen, but the distance between the wheel and the tool holder is to ensure that the tool holder has enough space for rotating the knife.
(7) the coordinates of the direction in programming are programmed in terms of diameter.

How to choose the CNC processing center

(1) the stiffness of the machining center
Because the rigidity of the machining center will directly affect the production efficiency and the machining precision of the machine tool, the machining speed of the machining center is much higher than that of the ordinary machine tool, and the motor power is higher than the common machine tool with the same specification, so the stiffness of its structure design is far higher than that of the ordinary machine tool. Orders can be checked according to the technological requirements, allowable torque, power, axial force and maximum feed force, according to the manufacturer’s numerical value. In order to obtain the high rigidity of machine tools, it is often not limited to the size of the parts, but the machine tool with 1 or 2 sizes relative to the size of the parts is selected.
(2) the machining accuracy of the machining center
Machining accuracy will directly affect the quality of products. Many people will directly affect buyers’ decisions when they question the accuracy of machine tools. Attention should be paid to the two different concepts of machining accuracy and machine tool accuracy. It is wrong to regard the location accuracy of the manufacturer’s sample or the product certificate as the machining accuracy of the machine tool. The precision of the position of the sample or the certificate is the precision of the machine tool itself, and the machining precision is the sum of the errors produced by various factors of the whole process system including the error allowed by the machine tool itself. In the selection, reference can be made to the evaluation method of process capability KP as the basis of accuracy selection. Generally speaking, the calculation result should be greater than 1.33.
(3) selection of CNC system in machining center
CNC system is the core of the machining center operation. CNC functions are divided into basic functions and selection functions. The basic function is provided, and the choice function is only provided when the user chooses these functions. The function of the CNC system must be selected according to the performance requirements of the machine tool. In order to order the function, we should not only set the functions needed, but also avoid the loss of the use rate, and also pay attention to the relevance between the functions. In the numerical control system that can be selected, the performance is very different. We should choose according to needs and not unilaterally pursue high targets, so as not to cause waste. When selecting a number of machine tools, it is possible to use the same manufacturer’s numerical control system as much as possible, so that operation, programming and maintenance can be more convenient.
(4) the number of coordinate axes and the number of linkage axes
The number of coordinate axes and the number of linkage axes should meet the requirements of typical workpiece processing. The number of coordinate axes is also one of the marks of machine tool grade. Under normal circumstances, with the manufacturer, the same specifications, the same accuracy of machine tools, add a standard axis, the cost will increase by about 35%. Although increasing the number of axes can enhance the function of machine tools, we must pay attention to the technological requirements and capital balance.
(5) the automatic knife exchange device and the capacity of the knife library
The selection of automatic tool changer mainly considers the time and reliability of tool changer. Short switching time can improve the productivity, but the changing of the knife time is short, the common tool changing device has complex structure, high failure rate and high cost. Too much emphasis on changing the knife time will increase the cost and increase the failure rate. According to statistics, about 50% of the faults in the machining center are related to the automatic knife exchange device. Therefore, the automatic tool changing device with high reliability is chosen to reduce the failure rate and the cost of the whole machine, on the premise of meeting the requirements. The working quality and tool magazine capacity of automatic tool changer will directly affect the performance and quality of the machining center. The capacity of tool magazine is to meet the needs of a complex machining part for cutting tools.

GFRP grille cutting method

Introduction of GFRP grille cutting method:
For the installation of grille, we must first do the work of grille cutting.
1. according to the size and installation requirements, the grid is reasonably cut and processed to maximize economic efficiency without affecting the internal performance of the grille. The cutting face must be coated with resin to ensure that its decay resistance is not affected.
A. cutting:
Linear cutting: FRP grille can be cut on the spot with ceramic disc or emery disc cutter, or even ordinary hacksaw blade.
Curve cutting: grille openings, arc and other arc cutting can be installed with metal cutting blades electric saw or hacksaw.
B. drilling:
Holes above 12mm can be drilled with regular drill drills.
Small holes can be machined by hand held electric hole machining tools or general electric drill.
C. grinding:
It can be polished by hand angle polisher, grinding wheel, ordinary file and sandpaper.
Note: A. This material cannot be turned and tapped.
B. arbitrary cutting will not change the mechanical properties of the grille, but will not cause any other consequences.
2. security measures:
Before cutting, operating workers should wear protective glasses and masks to prevent objects from splashing into the eyes and reduce dust inhalation; wear gloves and work clothes to prevent dust from entering the skin; choose a well ventilated and bright spot for cutting; before cutting, all electric tools should be checked to see if all electric tools are complete.

Common quality problems and main reasons of CNC machine bearings

In assembling the bearing of the CNC machine tool, the load should be preloaded, so the original clearance will be eliminated after the bearing is installed. Then it is very important to say that the contact angle and precision of the CNC machine tool bearing are very important. Therefore, when installing bearings, it is necessary to ensure that the contact angles are qualified, while ensuring the actual width of the angular contact ball bearings to meet the requirements. Failure of bearings during operation is a common occurrence, so there is no need to make a fuss. There is a failure, and the key is to judge and deal with it.

Next, we analyze the common quality problems and causes of CNC machine tools bearings.

1. Improper installation

1, when brute force is installed, direct bearing with hammers will cause the most damage to the bearing, which is the main reason for the deformation. This is very common in some small machine tool factories. When installing bearings, professional bearing mounting tools are used to avoid this.

2, installation is not in place, installation deviation or not installed to the bearing position, resulting in bearing clearance is too small. The inner and outer circles are not in the same rotating center, causing different concentricity.

Suggestion: choose proper or professional bearing installation tools and install them with special instruments.

Two. Poor lubrication

According to investigation, poor lubrication is one of the main reasons for premature bearing damage. The main reasons include: untimely injection of lubricants or lubricants; lubricants or lubricants not added in place; lubricants or lubricants improper selection; improper lubrication and so on.

Suggestion: choose the right lubricant or lubricating oil and use the correct way of lubricating filling.

Three. Pollution

Pollution also leads to premature damage to the bearing. Pollution means that dust and metal chips enter the bearing. The main reasons include: prematurely opening the bearing packaging before use, causing pollution, the working environment is not clean, causing pollution, the working environment of the bearing is not clean, and the working medium is polluted. All spindle assembly is done in constant temperature cleanroom, thereby avoiding bearing contamination.

Suggestion: it is best not to disassemble the packing of the bearing before use; keep the installation environment clean, clean the bearings to use, and strengthen the sealing device of the bearing.

Four. Fatigue

Fatigue damage is a common way of bearing damage. The common causes of fatigue damage may be that the bearings are overloaded over a long period of time, not timely maintenance, improper maintenance, and equipment aging.

Five, the quality of the bearing

The quality of bearing itself is directly related to the service life. Our company uses all imported bearings or domestic brand lines to avoid this problem.

Unit maintenance

Class a maintenance
1. Daily:
1) check the daily work of the generator.
2) check generator: Oil plane and coolant plane.
3) whether the generator is damaged or leaked, and whether the belt is loose or worn.
Two. Every week:
1) repeat a daily a class examination.
2) check the air cleaner, clean or replace the air cleaner core.
3) release the fuel tank and the water or sediment in the fuel filter.
4) check the water filter.
5) check the starting battery.
6) start the generator and check if there is any effect.
7) use the air gun and the radiator at the front and rear ends of the water cooler.
B maintenance
1) repeat a class a daily and weekly examination.
2) replace the generator oil. (the oil replacement period is 250 hours or one month)
3) change the oil filter. (oil filter cartridge replacement period is 250 hours or one month).
4) replace the filter cartridge of the fuel filter. (the replacement period is 250 hours or a month)
5) replace the coolant or check the coolant. (the replacement period of the water filter element is 250-300 hours, plus in the cooling system.
Injection of supplemental coolant DCA)
6) clean or replace the air filter. (air filter replacement cycle is 500-600 hours)
C maintenance
1) replace diesel filters, oil filters, water filters, and replace water and oil in tanks.
2) adjust the tightness of the fan belt.
3) check the turbocharger.
4) dismantling, checking and cleaning PT pumps and actuators.
5) dismantle the cover of the rocker chamber and check the T-shaped pressure plate, valve guide and intake and exhaust valves.
6) adjust the lift of the nozzle and adjust the gap between the valve.
7) check the charging generator.
8) check radiator radiator and wash radiator external radiator.
9) add the tank inside the water tank and clean the inside of the water tank.
10) check the diesel engine sensor and connecting wire.
11) check the diesel engine instrument box.

What are the structural features of the hot air blowe

Generally speaking, when the hot air machine is produced, it is important to take into account the nature of the power supply. It has a certain influence on the insulation structure of the variable frequency machine, the vibration of the motor, the noise and even the method of cooling when the machine works, so the problems to be paid attention to are:

In the motor device of the hot air machine, many of them are insulators, because the heat fan is generating electricity in the process of working, and the insulation needs different levels. In the case of different levels of insulator, especially the coil, the higher the resistance and the resistance voltage ability is, so that it can run smoothly.

Many hot air machines will produce vibration and noise when they work, which is related to incomplete structure of the engine. Sometimes the lack of parts in the engine can also cause some vibration and noise when the hot air fan is running, and the overall performance of the engine is good, and the fan’s turn can be improved. It is also good to avoid vibration caused by normal working frequency.

The cooling mode of the motor after working is a special feature of the heat fan device. After the motor is heated for a long time, the equipment inside the general hot air machine will be cooled automatically, and the air vent is opened to cool it, and the good heat dissipation can be kept to protect the whole hot fan. This way is to let the motor alone. To start the machine.

The capacity of the hot air machine is different for the wind, and its capacitance will be different. Many hot air opportunities are used to install insulation bearings to work, so that the shaft current can be avoided effectively. The friends who have used industrial hot air machines know that if the axial current is added up, it will be easier to damage the bearing. It can not be used, so it is good to set the bearings into insulators.

Some hot air machine electric equipment can be variable frequency, like the frequency conversion air conditioning used in home, power is constant, speed has a great influence on it, more than a certain speed, it is necessary to take measures to endure high temperature, special grease can be complementary to the high temperature bearing, to ensure the safety of the motor.

Through the introduction of the structural features of the above hot air blower, we can roughly understand some of the performance characteristics of the hot air blower from the structure, and the unique advantages of the motor devices in all kinds of hot air machines, which are mainly related to the production environment of the factory, and the selection of these motors is also related to the cost of the cost, so I We should choose as much as possible according to the specific needs.

What are the modes of the automatic sorting machine?

In the long run, e-commerce is the general trend. In the boom of e-commerce, logistics has increasingly become the key point. Jingdong’s big investment in the logistics system, Taobao’s big logistics strategy, and the large and small logistics centers of traditional enterprises entering the electricity supplier have attracted considerable attention. Quick sorting and delivery within a short time have become the focus of competitive advantage of e-commerce enterprises. The automatic sorting machine has become the favorite object of the major logistics companies. So, what are the modes of the automatic sorting machine? Here is a little editor for you to answer.
One, “RF picking +PTL sowing” mode
“RF picking +PTL (electronic label) sowing” means that after the logistics center receives the customer sales order, it starts picking operations according to the distribution station, distribution time, the order of the express company and so on, and divides the numerous orders into one order picking wave. Each wave number includes multiple orders to generate a picking list. If the interior of the warehouse is divided into multiple picking areas, in order to improve the picking efficiency, the picking list is further dismantled into a number of small picking lists, and each small picking list corresponds to a picking area. Use RF to pick up goods in different areas and merge the selected items into a turnover box. Then transfer the turnover box to the PTL (electronic label) sowing rack, and distribute the goods to one customer. Then check the goods of each customer, and finally package and collect goods to the corresponding distribution stations.
1. Process description
(1) start the wave. Generate picking list and picking list, send the picking order to RF to pick up goods.
(2) pick up the goods. The picking man uses the pick up truck to pick up the goods, and one picking truck is placed at the same time with multiple turnaround boxes, usually 6~8, which are used inside the logistics center. Use RF to pick up goods from each picking place and put them in the turnover box. After picking up a picking area, the selected items are placed on the pre picking shelf.
(3) confluent. A confluence turnaround box is used to collect the goods on the selected shelves in turn, and a confluent turnaround box collects the goods of a picking list, which corresponds to a number of customer orders. After the completion of the confluence, transfer the turnover box to the Re-bin Wall sowing area.
(4) PTL sowing. Scan the box code of the turnover box, scan the barcode, and put the goods into the customer’s slotting location according to the instructions of the electronic label lamp.
(5) print the documents. After the sprint is completed, print out the customer’s invoice, invoice and face sheet.
(6) packing. Put the invoice, invoice and goods in the package / bag, pack and place the sheets on the outer case / bag.
(7) collect goods. The collector sets the customer’s parcel to the collection location of the distribution site.
2. Scope of application
The logistics center with large annual distribution, large single warehouse, high investment in hardware and high accuracy in picking goods is suitable for RF+PTL picking mode. For large logistics centers, automatic sorting machines can be used to automatically distribute customer parcels to each distribution station or collect cages to improve the sorting efficiency.

Two, “label picking + label two sowing” mode
Label picking + label two time distribution “means that the logistics center starts picking wave times, each time includes multiple customer orders, printing the picking labels of the wave times, one piece of goods and one label (including customer order number, picking and cargo information, etc.). The picker picks up one lot of goods at a time, picking out the goods according to the labels and placing them in the pickup truck. Once a wave is finished, pick up the truck to the sowing area, put the goods into the customer’s slotting location, and use RF to associate the goods with the picking labels and the slots. After the sowing is finished, print out the invoice, invoice, face sheet and put it into the customer’s slots. Then, check the goods and documents, package, weigh and collect goods.
1. Process description
(1) receive the customer sales order. WMS receives customer sales orders of ERP system and generates distribution notice in WMS.
(2) start the wave. Distribution operation, also known as “wave management”, through the order source, express company, whether there are invoices, whether VIP customers and other ways to select the distribution notice form, distinguish the wave, start the warehouse internal operations, generate the warehouse pick picking use order. At the same time, the system automatically determines whether the goods need to be replenished from the storage position to the picking position according to the quantity of the demand for the goods and the number of the selected locations. If the replenishment is needed, the replenishment list is automatically generated and the replenishment instruction is sent to the RF of the tonic.
(3) replenishment. Replenishment personnel replenish goods that are not enough in order of picking stock; support multiple replenishment timing and replenishment strategy, including the amount of a wave demand before picking up the order of picking, and several kinds of operation methods, such as replenishing the goods to the picking position, and so on, and supporting the replenishment strategy according to the customer’s individualized demand. And the replenishment algorithm.
(4) pick up the goods. Each picking clerk can work multiple orders at the same time, such as 50 or 100 orders, depending on the quantity he can pick. The order behavior 1 goods are placed on the first floor of the picking trolley, and not 1 of the goods are placed on the two level of the picking trolley. In order to facilitate the workload of the assessment, pick up staff pick up labels, brush staff card, statistical workload.
(5) sowing. After picking up the goods, put the goods on the slots. An order corresponds to a sowing place. When goods are put into cargo spaces, RF is used to scan the goods picking labels and scan the location bar code, and associate them with RF.

CNC cutting tools, hard material technology!

In the mold manufacturing process, the use of hard material milling technology can replace some of the most expensive and most time-consuming processing steps, which can eliminate or greatly reduce the work of electrode milling, EDM processing, grinding, polishing, and point by point dressing on press.
Processing in “walnut shell”
Hard material milling technology is a branch of high speed machining technology. The core of high speed machining technology is to carry out multiple minor cutting processes with close steps, thus leaving only very tiny machining traces on the machined surface. The goal is to greatly reduce the requirement for subsequent processing. For the tool, in order to achieve effective chip load, the tool feed speed and spindle speed must be greatly improved to exceed the normal processing speed used in the traditional processing technology, so the process is named “high speed machining”. High speed feed also greatly improves the cutting speed of cutting tools, so the speed of machining workpiece is faster than that of traditional methods.
The technology of hard material milling is a step further than the concept of high speed machining. The combination of high speed light cutting and high speed spindle can effectively process hardened steel, so that the original properties of materials can be maintained. At the same time, a small diameter round end end milling cutter is used for high speed machining with close interval interval. The surface finish of the machine is close to the level of hand grinding and polishing. Because steel is processed under hardened condition, there is no need for subsequent heat treatment, stress relief or grinding. More importantly, this process can also replace many EDM processes with high processing cost.
Another advantage of hard material milling technology is that it can guarantee very precise tolerance size (10mm), which is precious to die processing. The moulds after processing do not need to be trimmed by manual work, and the shape of the die is completely consistent with the CAD design model because of the degree of no manual finishing after processing. Moreover, the processing of mould mating surface has reached the level without any dressing. The concept is to follow the parting line, usually at one end of the die cavity, to make a little bit more precise, so that it is slightly lower than the nominal size. In this way, when the half of the die is closed, a little gap between the contact surface of the die can be left, but the gap is very small (usually only 0.2mm), so that a part of the plastic can be flow out in the injection molding, but the die can still keep the closed state effectively. Moreover, when molten plastic is injected into the mold, this gap also allows air to be removed from the gaps without prior ventilation. The small contact pad on the corner keeps the gap, otherwise the contact between the closed surfaces will not be able to touch each other. Generally speaking, the interference between these mating surfaces must be solved in the process of point by point dressing and matching. There is no such problem now. When the core and die cavity are closed, the interaction between the surfaces is eliminated because of the clearance, so the surface is completely protected and the parts produced will not appear to be flying.
Improve efficiency from the tip of the knife
Mastering the technology of hard material milling may be a challenge. The way to understand hard milling technology is to know how to protect the tool tip. Concentrate on making cutting tools safe and effective. If all of these are managed in an orderly way, the tip of the end milling cutter can be integrated with the processed materials and be machined freely. If any part of the system is neglected or interrupted, the tool tip will suffer and the whole process will fail.
Taking the problem of end milling as an example, the following factors should be noted:
1. Cutting tools
Generally, round end end mills are used for rough machining, semi finishing and finishing. The round end milling cutter with two chip grooves is specially used for finishing. In the hard material milling process, these finishing tools are very important. A round end end milling cutter for finishing must meet two key requirements: the tool must have a near perfect radius and a virtually flawless cutting edge. The precision of the radius of the blade must be very high, so that both the high or low chip grooves will not cause the unaverage state of the metal scrap, so as not to affect the geometric shape, reduce the surface quality and the tool life, the precision of the end milling cutter used in the workshop should be at least 10mm. The circular end milling cutter with a diameter of 0.3mm is also used occasionally, with a radius accuracy of + 5 mm.
The cutting edges of chip removal grooves will inevitably have some trace chips, breakage or other irregular shapes. These defects show that they accelerate wear when touching workpiece. This situation will lead to rough roughness and shorten the service life of the tool. The service life of a tool is a very critical factor, because when the machine is unmanned, the workshop is entirely dependent on the End miller to work to the desired time limit.
Suppliers such as OSG and NS tools can provide tools that meet the above specifications, but their prices are much higher than those of standard tools. It is absolutely necessary to use this quality grade tool, and the cost should not be a problem. These tools are the basis of die processing, which can save the polishing process and the point by point trimming process of the mold. In the hard material milling process, it is a very important investment to add these tools.

What is a stamping die

Stamping die is a special process equipment for processing the material (metal or non metal) into parts (or semi finished products) in cold stamping process. It is called cold stamping die (commonly known as cold stamping die). Stamping, at room temperature, is a pressure processing method using the mold installed on the press to make the material pressure to produce the separation or plastic deformation so that the required parts can be obtained.

Performance of heavy wood saws with wooden keel

Multi chip saw is a tool for wood processing, and the requirement for this tool is relatively high. There is also the existence of a single saw, the function of which is the same as the multiple saw, but it can only be used for simple wood processing, so it can only be used in more difficult wood processing. And the demand for single saw is relatively low, because its role is relatively small, so in general, poor quality single saw can also be used.
But the requirement for multichip tools is high, because the main purpose of using them is to save materials and improve efficiency. Because the multi saw is made up of many saw blades, the surface of these saw blades must be smooth, otherwise it will be difficult to use. In addition, saw blades should be thinner, because too thick saws may not work well, and they will take up the place.
This tool is also very convenient and quick to work. First, put wood at its feed inlet and then wait for it to come out at the discharge port. Its efficiency is very high. * it can produce twenty to thirty square lumber, which is not available by other equipment.
Multiple saw has a variety of advantages, which is the main reason people are willing to use it, and our ordinary life can not be separated from it, its role is very important.

Multi saw is a combination of multiple saw blades, and a single saw is a single saw operation. The general requirement for a single operation is not very high, even if the quality is slightly worse. But the multiple saw is not the same, and the requirements of the saw blade are higher, but the use of multiple saws generally requires a comparison of wood saving and sawing. Small, the saw blade is very good.
Customized multi model square lumber sawing saws factory direct sale

First of all, we talk about the problem of the card machine. The card machine is usually caused by the improper operation of the workers. After the timber is cut down from the forest farm, it is ready to go through the branch and then pass the cutting to the multi saw. The nature of the wood determines its processing difficulty, the scar on the wood, the harder place, the workers if they have the Scars are always in the direction of the sawtooth, because the lateral hardness of the wood is uneven, and if the quality of the saw blade is not good, at this time the transverse sawblade can not unanimously cut the wood, it will produce uneven force and can easily be stuck to wood. Good multi saws generally use better quality saw blades, even if the hard scars can be very longitudinal, and will not encounter the problem caused by the uneven force of the saw blade. Again, the problem of wood sawing saw blade, generally burning saw blade after the equipment factory, manufacturers in the selection of multiple saw, do not pay attention to the quality of the problem, burning saw blade generally because in the sawing wood, heat radiation does not cause heat concentration in time. In order to avoid such a situation, the general multi saw will have a cooling device. The saw blade material used in good multi chip saws is conducive to heat dissipation, and there are cooling holes on the saw blades. The general multi chip saw will test its quality before the factory is out of factory. Consult the manufacturer when changing the saw blade. The surface of the processed wood is not flat, and there are many reasons for this situation: the wear of the saw blade will cause this situation, the spindle is loosened because of the problem of use, and the surface of the jacket of the saw blade is not smooth, and the problem will be produced without attention when changing the saw blade. Generally speaking, although many saw saw the technical requirements of the workers are not high, but the workers still have certain requirements, and the machine will be used by the people who will use it.