Precautions for the use of tractors

(1) the throttle should not be placed at the maximum position at startup. When the engine is started, the throttle should not be placed in the maximum position, otherwise the engine can reach a high rotational speed and discharge a large number of black smoke at the same time, which will aggravate the wear of the parts and shorten the service life of the machine. When starting, the throttle should be placed in the middle oil gate position.
(2) the cause of engine reversal at startup. When starting, if the engine comes out of air filter smoke and muffler intake, this means that the engine is reversed. Most of the engine reversal is due to the excessive oil advance angle. Oil has been supplied before the piston has reached the level of fuel supply. When the fuel is deflagrated ahead of time, the piston is pushed back and the crankshaft is reversed; in addition, when the engine is started, the rolling time is too long and is not started, the fuel accumulates too much, and it can easily cause the reversal, or when the flywheel is rocking, the pressure relief handle is moved to the “running” position and satisfies the mixture when the piston does not reach the stop point. Combustion conditions, the mixture of deflagration after the piston back, resulting in reversal. When the engine reverses, the order of the intake and exhaust stroke is reversed, and the oil of the oil tray in the air filter is often flushed out, the engine sound is abnormal, and the parts are very easily worn. Once the reversal occurs, shut down the accelerator immediately and stop the fire.
(3) in winter, after the tractor stops, the cooling water can not be released immediately. The normal working temperature of the engine is 75~95 degrees, while the external temperature is very low in winter.  After the tractor stops, if the cooling water is released immediately, because the surface of the metal parts is cooled and contracted suddenly (the metal temperature in the machine parts is still high, it seldom contracts), it is easy to make the body and cylinder head produce deformation and crack. Therefore, in winter, the cooling water must be released when the water temperature drops to 40~50 degrees after the engine is extinguished.
(4) no cold water can be added to the engine when the engine is overheated. When the engine needs to add water due to the lack of water in its work, it should not immediately add cold water. Otherwise, the body and cylinder head will crack due to the sudden shrinkage of local temperature and shrinkage of metal. When adding water to work, the engine should be operated at a low speed for 10~15 min, and when the water temperature is lowered, the cooling water will be slowly added to the engine.
(5) no long-term overload operation. Some drivers, because of the lack of common sense of agricultural machinery, want to earn more money and increase their loading at random when they are engaged in transportation operations. Due to overloading operation, the fuel supply is increased, the rotational speed is reduced, and the fuel combustion is bad. This will not only increase the wear of parts, but also reduce the service life of locomotives. So, do not overload the locomotive.

Basic information of optical fiber laser marking machine

In recent years, fiber laser has become a hot topic in laser physics research. It is considered that it is possible to completely replace the new generation of solid laser. Fiber laser is a laser which uses the rare earth element glass fiber as the gain medium. The fiber laser can be developed on the basis of the fiber amplifier. The high power density is easily formed in the optical fiber under the action of the pump light, which causes the laser energy level of the laser working material to be reversed by the number of particles, when the positive feedback loop is properly added. The resonator can form a laser oscillating output. Fiber laser marking machine uses laser beams to mark permanent marks on different material surfaces. The effect of marking is to reveal the deep material through the evaporation of the surface material, or to “engrave” from the chemical physical changes of the surface material through the light energy, or to burn out some of the material through the light energy, and show the patterns, characters, bar code and the like of the required etching.

Compound process process of composite machine

1. preparation

First of all, the guide roller is loaded according to the direction of the line. At the same time, the adhesive is adjusted in proportion and the heating system of the oven is started. When the corresponding setting temperature is reached, the transmission motor can be opened, and the coating can be produced.

2. coating

The substrate of the unwinding device must first pass the anilox roller, then coat with the glue, then dry the bath through the drying way, that is to finish the coating process.

3. compound

The compound process is realized after the EPC gas liquid rectify deviation enters the composite part and is bonded with the substrate of the second unwinding part.

4. cooling reel

After the cooling coil is completed, the whole production process of the substrate is completed, and the following problems should be paid attention to in production.

(1) adjust the flatness of the substrate by adjusting the position of the adjusting roll.

(2) adjusting the compound pressure between the compound rollers by adjusting the relative distance between the two compound rollers.


Packaging machine is a kind of machine packaged with products, which plays a protective and aesthetic role. Packer is mainly divided into 2 parts: 1. assembly line production, 2. product peripheral packaging equipment.

Application of packaging machine
Pipelined overall production packaging is used in food, medicine, daily chemical, hardware, lighting, furniture and other industries (bag, bottled), filling (filling), sealing machine and code.
Mainly include: liquid (paste) filling machine, pillow type packing machine, horizontal packing machine, vertical packing machine, powder particle packing machine, bag type automatic packaging machine, frozen product automatic packaging machine, etc.

Periphery of the product
Packaging equipment for production, after spraying, production date, seal, shrink film, etc.
It mainly includes: packing machine, filling machine, sealing machine, coding machine, packing machine, vacuum machine, shrinking machine, vacuum packing machine, weighing packer, etc.
The packaging machine adopts the color touch screen and the stable and reliable PLC control, bag making, metering, filling, sealing, code making and bag cutting.
It uses gas path control and circuit control to separate independently, with low noise and stable performance.
Using double belt servo die and double servo control, less resistance, better packaging bag shape, more beautiful, high precision positioning, accurate size.

The main use of common machine tools

It is mainly used for processing various end surfaces of revolving surface and revolving body. For example, the inside and outside cylindrical surface, conical surface, ring groove and forming rotary surface, turning end and a variety of common thread, equipped with technical equipment can also process a variety of special surface. On the lathe, drilling, reaming, reaming, knurling and so on can be done.
Milling machine
A wide range of machine tools, the milling machine can be machined on the plane (horizontal, vertical), groove (key slot, T groove, swallowtail groove, etc.), toothed parts (gear, spline shaft, sprocket good, spiral surface (screw, spiral groove) and various surfaces. In addition, it can also be used for machining and cutting off the surface and inner hole of the revolving body. When the milling machine is working, the workpiece is installed on the worktable or on the top class accessories. The milling cutter rotates mainly, with the feed movement of the worktable or milling head, the workpiece can get the required surface. Because of the Multi Tool interrupted cutting, the milling machine has higher productivity.
Slotting machine
It is mainly used for processing various planes (such as horizontal, vertical and inclined surfaces and various grooves, such as T grooves, dovetail grooves, V grooves, etc.) and straight line forming surfaces. If equipped with profiling device, it can also process space curved surfaces, such as turbine impeller and spiral groove. This kind of machine tool has simple structure and no cutting in return, so it has low productivity and is generally used for small batch production.
Boring machine
It is suitable for plane milling and hole machining for single piece or small batch production. The end of the spindle box is designed with a flat rotating disc radial tool frame, which can accurately bore holes and planes with larger size. In addition, drilling, hinges and thread processing can also be carried out.
Grinding machine
A machine tool that uses abrasive Abrasives (grinding wheels, abrasive belts, oil or abrasives, etc.) as tools for cutting the surface of a workpiece is collectively referred to as a grinder. The grinding machine can process various surfaces, such as cylindrical surface and conical surface, plane, gear tooth Gallery, spiral surface and various molding surfaces, and can also sharpen cutting tools and cut off, and so on. The process range is very wide. The grinding machine is easy to get high machining precision and good surface quality, so the grinding machine is mainly used for the finishing of parts, especially the finishing of hardened steel and high hardness special materials.
3040 double -1 drilling machine

A versatile machine tool with a wide range of applications can be used for drilling, reaming, reaming, counter facing and tapping. When equipped with process equipment on the radial drilling machine, boring can also be carried out, with universal worktables (MDT-180 type) on the bench drills, and keyways can also be milled.
Gear machining machine
Gear is the most commonly used transmission part, with straight teeth, helical teeth and herringbone cylindrical gears, straight teeth and spiral bevel gears, worm gears and non-circular gears. The machine tool for machining the surface of gear teeth is called gear processing machine tool.

How to get this summer the machinery industry order

The machinery industry has a potential seasonal peak season. It seems to be a true portrayal of most manufacturers in the summer. Order reduction is a normal phenomenon. In the days when this order is small, it seems that it is suitable for us to seize the opportunity to complete the change of quality, or even create products that are suitable for the market. I think it’s the top priority to work on it.
Manage and produce higher quality equipment in more ways. The corresponding adjustment can be made through the feedback from the market in the earlier period. Continuous optimization of the equipment. The adjustment of the number of production types in the early stage of the workshop.
All in all, what we can do now is to cater for the next season.

What are the applications of hot melt adhesives?

Toys (adhesive, fixed, wiring, insulation); small box sealed boxes, packaging; handbag leather bags; small household appliances, wires, joints, connectors; sound, frame, label; hardware fixed; small paper adhesive and fixed; small ornaments, crafts, hairpins, etc.; electronic products fixed, adhesive, insulation; He needs to use the glue manually or semi automatically.

Household electrical appliance industry

The hot melt adhesive is widely used in the sealing and sealant of the refrigerator, the assembly of electronics and electrical appliances, etc.

Automobile industry

The manufacture of automobile headlights and rear lights, windscreens, doors and interior seals.

Filter industry

The hot melt adhesive machine is widely used in the air filter without partitions. The adhesive is firm and reliable, and the sealing is good. It meets the physical and chemical properties of the adhesive material.

Bottle cap bonding industry

Hot melt adhesive machine is widely used in the bottle cap adhesive industry, such as cosmetic bottle cap, liquor bottle cap, chain pendant adhesion and so on.

Non-woven fabric industry

Hot melt adhesive machine in diapers, adult incontinence supplies, sanitary napkins, medical protective clothing. It can be used with domestic and foreign equipment.

Packaging industry

The hot melt adhesive spray machine can be applied to the sealing of the upper and lower parts of the box and the packaging of the beverage straw, the laser paper and the coloured paper.

Packaging and labeling industry

Hot melt adhesive coater has been widely applied in trademark paper, adhesive tape, label double-sided tape, medical breathable adhesive tape and other fields.

Shoe industry

Hot melt adhesive spray machine is also an indispensable assistant for shoe material adhesion.

Medical dressing industry

Hot melt adhesive coating machine and other equipment in the application of transfusion adhesive, non-woven breathable adhesive tape, self adhesive wound dressing, perforated membrane adhesive tape and other medical dressing industry.

Clothing and clothing compound industry

Hot melt adhesive coater series products have been widely used in clothing, clothing, coating and coating industry, and have been well received by users.

Share the installation elements of a vacuum pump

The vacuum pump is the basic equipment used to remove the gas in a special sealed container and make the container obtain a certain degree of vacuum. The so-called vacuum refers to a given space, the pressure of less than 101325Pa gas state. Due to the high development of modern science and technology, the application of vacuum pump has spread in all kinds of scientific fields and various enterprises and institutions. Next, the direct rotary vane vacuum pump manufacturer will share with you the installation elements of the vacuum pump.
1, according to the wiring requirements to connect the power and capacitance.
2, strictly prohibit pulling the lead line at random, so as not to cause damage or cause product failure.
3. When the vacuum pump is not in use, adjust the pressure regulating valve to evacuate the air and then cut off the power supply.
4, put the vacuum pump as far as possible in good ventilation, less dust and small humidity.
5. The base is fixed with rubber damping feet or spring minus (environmental protection equipment).
6, the power supply should have sufficient capacity to confirm that the voltage used meets the requirements of the product.
7, the air inlet is connected with the 1/4 joint or other specifications joint and the intake filter muffler and so on.
8, check the vacuum pump components without abnormal, plug the power cord plug into the requirements of the power supply socket (the power socket must be well grounded), the machine starts to work.
9, adjust the pressure regulating valve so that the pressure gauge indicates the required pressure and is stable. (this section needs to cooperate with our PC-3 type plastic vacuum dryer for needle valve regulation) without pressure regulating function of individual vacuum pump.

Inspection method of surface defect of precision tube

A general term for all kinds of defects that appear on the surface of precision tubes and non-ferrous metals and affect the quality of products. There are many kinds of precision tubes, most of which are named by the morphology of the defects, and others are named for their reasons.
In precision tube production, products are often divided into two categories according to the production process of defects.
One is the poor quality of steel, such as abscission layer, scarring, cracking, crack, hairline and bubble. Most of these defects are caused by poor quality of ingot.
The other is the defects of processing operation, including folding, ear, pock, convex hull, scraping, indentation, pressing into iron oxide skin, burr and so on. This kind of defect is produced in the process of plastic addition.

The inspection methods used for precision pipes of various uses are clearly stipulated in the corresponding product standards, including:
(1) the naked eye examination. For general purpose products, visual inspection of precision tubes is made by visual inspection, and sometimes by means of “test shovel” or “trial grinding”.
(2) pickling examination. A product that is suitable for important purposes.
(3) shot peening examination. For special purpose steel.
(4) nondestructive testing. In accordance with its quality requirements, J, a product of special important use, uses eddy current inspection, magnetic powder detection, penetrant flaw detection and ultrasonic flaw detection to check the precision tube (see the physical inspection of defects).

Ultrasonic introduction of nondestructive testing

Ultrasonic testing is suitable for nondestructive testing of metal, non-metal and composite materials. The defect location is accurate, the cost is low, the speed is fast, and the equipment is portable.

A principle and brief introduction

Ultrasonic flaw detection is a method using the ultrasonic energy to penetrate the depth of the metal material and from one section into the other section. A method of checking the defects of the parts at the edge of the interface is used to check the defect. When the ultrasonic beam is from the probe to the metal inside the surface of the part, the reflection wave occurs respectively when the defect and the bottom surface of the part are encountered. Pulse waveforms can be formed on the screen, and the location and size of the defects can be judged by these pulse waveforms.

According to its principle, ultrasonic testing can be divided into defect echo method, penetration method and resonance method. According to the waveform, it can be divided into longitudinal wave, transverse wave, surface wave and plate wave. Longitudinal waves are used to detect defects in metal ingot, billets, medium plates, large forgings, and simple parts of the shape. The transverse waves are the defects in the circumferential and axial cracks, scratches, welds, slags, cracks, and non penetration in the detection of pipe materials, and the surface wave on the surface of a casting with simple shape can be detected. A plate wave can detect defects in a thin plate.

Two. Detection process

A variety of detection techniques can be used in ultrasonic testing. In the process of implementation, each detection technology has its special problems to be considered, and its detection process has its own characteristics. But all kinds of ultrasonic testing technology have common technical problems. Its detection process can be roughly divided into the following steps:

1. Preparation of the specimen
In order to improve the reliability of the test results, the material grades, properties, manufacturing methods and process characteristics of the tested parts should be dealt with, and the types and causes of the defects, the maximum possible orientation and size of the defects, the stress state of the tested parts and the inspection standards are understood.

2, the determination of testing conditions, including the choice of ultrasonic detector, probe, test block and so on.
The selection of the incident direction should make the center line of the sound beam and the defect extension plane, especially the defect surface perpendicular to the maximum direction of the force, as close as possible to the vertical, and to obtain the maximum signal of the defect. In addition, it is difficult to avoid the discrimination of the defect by the reflection or variant signal in order to avoid the shape and structure of the workpiece. The direction should also be chosen in the absence of such interference signals. It should be checked from both positive and negative sides when necessary.

The selection of the probe is also particularly important. As one of the most important tools for ultrasonic testing, there are many kinds of probes and different structural types. Before testing, the probe should be selected according to the shape, attenuation and technical requirements of the subjects. The selection of probes includes selection of probe type, frequency, wafer size and refraction angle of inclined probe (K value). According to the shape of the workpiece and the position and direction of the defect, the method of detection is selected. Once the method is determined, what type of probe should be used is also determined.

3. Adjustment of testing instruments
When the instrument starts to be used, the horizontal and vertical linearity of the instrument is measured. The time base scale can be adjusted proportionally to represent the horizontal distance, depth or sound distance of the pulse echo.

4. Scavenging
Two principles are generally considered in scanning, one is to ensure that the entire inspection area of the specimen is covered with enough sound beam to avoid leakage, and the two is that the incident direction of the sound beam in the scanning process is always in accordance with the required requirements. The general standard stipulates that the scanning speed should not exceed 150mm / S. In the process of scanning, the probe should be given appropriate and consistent pressure to keep the probe moving smoothly. In the course of scanning, the direction of the probe should be strictly in accordance with the rules of the scanning method (the oblique probe should be paid attention to).

Because the change of the moving direction of the probe will change the sensitivity of the defect detection due to the change of the direction of the incident wave for the single probe detection, the reflection or transmission wave can not be received by the other probe for the double probe detection. Therefore, in order to avoid omission, each scan should have a certain percentage of beam coverage.

5. Assessment of defects
The specific assessment method of defects is omitted here. Interested friends can check the corresponding national standards.

6. The compilation of results and reports

Three, advantages and disadvantages

1. The main advantages
The penetration ability is strong, the depth of detection can be up to several meters; the sensitivity is high, and the reflector with equal air gap reflection of about a few millimeters of the diameter can be found; it is more accurate in determining the direction, size, shape, and so on of the internal reflector; it can provide the defect inspection results immediately; the operation is safe and the equipment is portable.

2. Main shortcomings
Ultrasonic flaw detection is not intuitionistic to the display of defects. It is difficult to be affected by the main and objective factors. It is difficult to inspect the rough, irregular, small, thin or heterogeneous materials, and it is difficult to make a precise qualitative and quantitative characterization of the found defects; it is not suitable for the structure with the cavity.

32 common problems of NDT
Professional, high quality, low price scratch free products consult long-term cooperative customers.

1. What is nondestructive testing / nondestructive testing?

(1) nondestructive testing is a testing method for the inspection of the surface and internal quality of the tested parts without damaging the working state of the workpiece or raw material.
(2) NDT: NondestructiveTesting (abbreviated NDT)

2. What are the commonly used methods of flaw detection?

According to NASA’s investigation and analysis, NDT can be divided into six categories and about 70 species. But in practical application