CNC Technology – Page 71 – CNC Machining & Turning, Milling, Metal parts

The development process of CNC machining production

According to the product drawings or templates provided by customers, we can deliver high-quality molds and qualified mold samples within the time required by customers. At the same time can provide: participate in customer hardware product development, sample formulation, mold design and manufacturing, hardware parts production one-stop service.

Special design and manufacturing will be carried out according to the shape, size and dimensional accuracy, surface quality and other technical requirements and production batch of manufacturing products. Therefore, it is very important to study the modern design and manufacturing technology of die and mold, the practical experience in the process of mold design and manufacturing, as well as the technical management and process control of the production process, so as to form a standard and form an expert system, which is of great importance to improve the level of mold production technology and management, and to improve the core competitiveness of mold enterprises.

Today, the development process of production mode. Its main achievements and characteristics are as follows

Milling technology and precision form grinding technology are widely used, and the precision coordinate grinding technology for precision machining of round hole and mold hole with precise hole spacing is realized. It provides the key technology for EDM and WEDM. The specialization, serialization and standardization of die materials are realized. During this period, the high development of mold standardization, such as computer gong processing, Dongguan high speed computer gong processing, Dongguan mold processing, Dongguan Mechanical parts processing, CNC processing, fully using standard parts and components in mold production is not only a major achievement and feature of mold industrial production mode, but also an important technical basis for realizing modern mold production mode. With the progress and development of computer and machine tool industry, die CAD / CAM and CAD / CAM / CAE have become widely used production technologies. They are combined with high standardization to form a modern mold production mode, that is to realize the informatization and digital mold production mode of mold design and manufacturing.

Design: during the period of manual workshop mold making and the early stage of industrial mold manufacturing, mold design was not carried out, and mold manufacturing was completely dependent on the experience and skills of mold makers. With the development of industry, the application of die and mould is becoming more and more extensive, the requirement of mould performance and quality is getting higher and higher, and the production technology is constantly improving. Designing and drawing the die structure system diagram and parts drawing, defining the design requirements and manufacturing technical conditions are the first task and core technology in the mold production process, which has been evolving until now.

However, with the progress of computer and CNC machine tool industry, and the wide application of CNC machine tools such as machining center, the mold design method and method have produced substantial and breakthrough progress. Mold design includes the following three aspects: mold part modeling and structure design, mold structure system design, mold structure parameter calculation and setting. Mold design process and content. The die with high precision needs to be processed by high-precision CNC machine tool, and the die material and forming process have strict requirements, and CAD / CAE / CAM die technology is also needed to design and analyze. Due to the special requirements of some parts, the mold also needs to use advanced technology such as hot runner, gas assisted molding, nitrogen cylinder and so on. The manufacturer shall be equipped with CNC, EDM, WEDM and NC profiling milling equipment, high-precision grinder, high-precision CMM, computer design and relevant software. Generally, large stamping dies (such as automobile cover parts mould) should consider whether the machine tool has blank holder mechanism, or even edge lubricant, multi position progressive, etc. In addition to stamping tonnage, punching times, feeding device, machine tool and die protection device should be considered.

The manufacturing means and technology of the above mould are not possessed and mastered by every mould manufacturer and enterprise. When choosing a cooperative manufacturer, we must understand its processing ability, not only depending on the hardware equipment, but also combining the management level, processing experience and technical strength. For the same set of mould, there is sometimes a big gap between quotations from different manufacturers. You should not pay more than the value of the mold, at the same time, should not be less than the cost of the mold. Computer gong processing, Dongguan high-speed computer gong processing, Dongguan mold processing, Dongguan Mechanical parts processing, CNC processing mold manufacturers, like you, should make reasonable profits in business. Ordering a set of molds with a much lower price would be the beginning of trouble. Users should start from their own requirements and comprehensively measure. Avoid multi cooperation, try to make mold and product processing one-stop, with qualified mold (test piece qualified), not necessarily can produce a batch of qualified products. This is mainly related to the machine tool selection, forming process (forming temperature, forming time, etc.) and the technical quality of the operator. With a good mold, but also have good forming processing, the best is a one-stop cooperation, try to avoid multi cooperation. If the conditions are not met, one party should be fully responsible for the contract, and it must be written clearly at the same time.

The equipment of the mold department mainly includes CNC computer gongs, spark machines, milling machines, drilling machines, grinding machines and other complete equipment; the equipment of the injection molding department has a number of precision injection molding machines, and our professional engineering and technical personnel can be engaged in engineering design, mold development and manufacturing, product injection molding, And its quality assurance fully meet your requirements, computer gong processing | Dongguan high speed computer gong processing | Dongguan mold processing | Dongguan Mechanical parts processing | CNC processing. With the advanced technology and management mode, the system of specialized production is implemented according to the type of mold products

What is a vacuum blister mold

The design of vacuum suction molding mold includes batch size, molding equipment, precision conditions, geometric design, dimensional stability and surface quality. Properties and surface quality.

1. Batch size experiments, mold production hours, computer gongs processing plant Dongguan high speed computer gong processing plant Dongguan mold processing plant Dongguan Mechanical parts processing plant CNC processing can be made of wood or resin. However, if the mold used in the experiment is to obtain the data of shrinkage, dimensional stability and cycle time of the product, the single cavity mold should be used for the experiment, and it can be used in the production conditions. Molds are generally made of gypsum, copper, aluminum or aluminum steel alloys, and aluminum resin is rarely used.

2. In geometric design, dimensional stability and surface quality should be considered comprehensively. For example, the product design and dimensional stability require the use of female die (female mold), but the product with high surface gloss requires the use of male mold (punch). In this way, the ordering party of plastic parts will take these two points into consideration, so that the product can be produced under the best conditions. Experience has proved that the design that does not meet the actual processing conditions is often a failure. As a special process equipment with high service life, mould has the following production characteristics:

(1) It belongs to single piece and multi variety production. Dongguan mold production tells you that the mold is a special process equipment for high life, each mold can only produce a certain shape, size and precision of the parts, which determines that the mold production belongs to the nature of single piece, multi variety production procedures.

(2) The objective requirement of mould production cycle is short. Dongguan mold production tells you that due to the acceleration of new product update and market competition, the mold production cycle is required to be shorter and shorter objectively. The production management, design and process of die should meet the objective requirements.

(3) Complete set of mould production. When a part needs more than one pair of molds to process, each pair of molds often implicate and influence each other. Only when the final part is qualified, this series of molds can be considered as qualified. Therefore, this feature must be fully considered in production and planning.

(4) Mold test and repair. Dongguan mold production tells you that due to the above characteristics of mold production and the experience of mold design, the mold must pass the test punching or pressure test after assembly, and finally determine whether it is qualified; at the same time, some parts need to be repaired before final determination. Therefore, there must be a certain trial period in the production schedule.

(5) Mold processing is developing towards mechanization, precision and automation. At present, the requirement of die precision for product parts is higher and higher. There are more and more molds with high precision, high life and high efficiency. The machining accuracy mainly depends on the accuracy of machine tools, processing conditions, measurement means and methods. At present, the use of precision molding grinder, CNC high-precision surface grinder, precision CNC WEDM machine, high-precision continuous track coordinate grinder and CMM are becoming more and more popular, which makes mold processing develop to high-tech intensive.

Because different molding molds have been applied in many fields, and the manufacturing technology of professional molds has also changed and developed in recent years, the general design rules of vacuum Blister molding molds are summarized in this part.

The design of vacuum suction molding mold includes batch size, molding equipment, precision conditions, geometry design and dimensional stability

3. During the molding process, the dimension stability of the contact surface between the plastic part and the mold is better than that of the part leaving the mold. If the material thickness is required to be changed due to the requirement of material stiffness in the future, it may lead to the conversion of male mold to female mold. The dimensional tolerance of plastic parts shall not be less than 10% of shrinkage.

4. The surface structure of the plastic part should be formed at the contact with the mold in terms of the range covered by the molding material. Computer gong Processing Factory Dongguan high speed computer gong Processing Factory Dongguan mold Processing Factory Dongguan Mechanical parts processing factory CNC processing if possible, the surface of plastic parts should not contact with the mold surface. It’s like using a female mold to make bathtubs and washbasins.

5. If mechanical horizontal saw is used to saw off the clamping edge of plastic parts, there should be at least 6-8mm allowance in the height direction. Other finishing work, such as grinding, laser cutting or jet, must also be allowed. The gap between cutting lines of knife edge die cutting is the smallest, and the distribution width of trimming punching die is also very small.

6. Shrinkage and deformation, plastic is easy to shrink (e.g. PE), some plastic parts are easy to deform, no matter how to prevent, plastic parts will deform in the cooling stage. In this condition, it is necessary to change the shape of the mold to adapt to the geometric deviation of the plastic part. For example, although the wall of the plastic part remains straight, its reference center has deviated by 10 mm; the mold base can be raised to adjust the shrinkage of this deformation.

7. Shrinkage, the following shrinkage factors must be considered when manufacturing Blister molding mold.

Material selection for batch parts processing

Batch and production conditions. Computer gong processing | Dongguan high-speed computer gong processing | Dongguan mold processing | Dongguan Mechanical parts processing | CNC processing as shown in the figure of the drive shaft, the diameter is small, the diameter of each section of the outer circle is not big, round steel blanking is optional. The diameter of the gear shaft shown in the figure has a big difference. In order to save materials and processing time, if the batch is large and forging conditions are available, the forging blank should be selected; otherwise, round steel blanking is also selected. The bearing cover is made of cast iron, and the blank should be cast. Gear, its material is 40 steel, and the diameter of the outer circle is small, and the outer circle is short. Round steel can be used for blanking. Due to the large diameter of the outer circle and hole of the gear, the gas cutting blanking of steel plate with corresponding thickness can be selected for a single piece, and the forging can be used to forge the ring blank in large batch, which can not only save materials, but also reduce the processing time, and the mechanical properties of the forging blank are also good.

2. Determine the processing sequence of parts

The processing sequence should be determined according to the type, structure, size, machining accuracy, surface roughness and heat treatment of the blank.

3. Determine the processing procedure

Determine the machine tool, workpiece clamping method, processing method, processing size and detection method used in each process, including the allowance for the next process. Computer gong processing | Dongguan high-speed computer gong processing | Dongguan mold processing | Dongguan Mechanical parts processing | CNC processing generally small and medium-sized parts, the outer cylinder, inner cylinder and plane all refer to unilateral allowance. In single piece small batch production, the larger blank size is taken as the fire value, otherwise, the smaller value is taken. Total allowance: 3-6 mm for manual molding castings, 3-7 mm for free forging or gas cutting parts, and 1.5-2.5 mm for round steel. Process balance: 0.8-1.5mm for semi finish turning and 0.4-0.5mm for high-speed finish turning.

Steps of forming mechanical parts

(1) Hot working: casting, forging, welding, etc

(2) Cold working: turning, planing, milling, punching, pressing, riveting, etc

Computer gong processing, Dongguan computer gong processing, high speed computer gong processing, mechanical parts processing, computer gong processing. 2. There are many forms of cold processing

(1) Sheet metal parts: punching, pressing, riveting, etc

(2) Comprehensive parts: turning, planing, milling, etc

3. General mechanical processing refers to the processing of comprehensive parts. Its forms are as follows:

(1) Workpiece rotary processing: Turning

(2) Tool rotary processing: drilling, milling, boring, plane grinding

(3) Workpiece and tool are rotary processing: internal grinding, external grinding, rolling cutting

(4) Workpiece and tool are not rotary processing: planing, inserting, pulling

Computer gong processing | Dongguan computer gong processing | high speed computer gong processing | mechanical parts processing | computer gong processing (5) other: electrical processing, laser, water jet, etc

4. Distinguish the processing form according to the processing content:

(1) Processing of rotary parts: turning, internal and external grinding, etc

(2) Face processing: milling, drawing, surface grinding, etc

(3) Hole processing: drilling, boring, expanding, reaming, pulling, grinding, etc

What are the specific CNC processing methods

What are the specific processing methods? People may not know how it is processed. If there is still something you don’t understand, you can pay attention to the following relevant information!

1、 Plane hole series parts

Computer gong machine tools (such as computer gong drilling machine) are commonly used for processing. When selecting the process route, the two principles of processing accuracy and processing efficiency are mainly considered.

2、 Rotating parts

Commonly used computer gong lathe or grinder processing.

1. Considering the machining efficiency: when machining on the lathe, the machining allowance is usually large, so the rough machining route must be arranged reasonably to improve the machining efficiency. In actual programming, it is not suitable to use cycle instruction (otherwise, there are too many empty knives at the working speed). Computer gong processing | Dongguan computer gong processing shop | high speed computer gong processing | mechanical parts processing | computer gong processing shop | computer gong processing shop | the better method is to use rough lathe to cut materials as soon as possible, and then finish turning.

2. Considering the strength of tool tip: low strength tools are often used to process small grooves on computer gongs and lathes.

3、 Plane profile parts

1. Cutting in and cutting out direction control: radial cutting in, leaving pits on the surface of the workpiece; transverse cutting in and cutting out, the workpiece surface is smooth.

2. Selection of one-time approximation method: when the computer gong machine tool with only linear and circular interpolation function can process irregular curve contour, it needs to use tiny straight line segment or arc segment to approximate the processed contour (the error is called primary approximation error). When computer gong machining | Dongguan computer gong processing shop | high-speed computer Gong processing | mechanical parts processing | computer gong processing shop | computer gong processing shop | computer gong processing shop | computer gong processing | computer gong processing shop | Machining should make the workpiece error within the acceptable range, and the number of program segments is better.

There are many classifications of large-scale Longmen computer gong processing center

1. Horizontal machining center: it refers to the machining center with the spindle axis parallel to the worktable, which is mainly suitable for machining box type parts.

2. Vertical machining center: it refers to the machining center with the spindle axis perpendicular to the worktable. It is mainly used for processing complex parts such as plates, plates, molds and small shells.

3. Multi axis linkage machining center, also known as universal machining center: computer gong processing | Dongguan computer gong processing shop | high speed computer gong processing | mechanical parts processing | computer gong processing shop | refers to the angle between the processing spindle axis and the rotary axis of the worktable to control the linkage change

Maintenance methods of CNC machining

Easy to operate: users only need to follow the menu to operate correctly. Convenient programming: it has a variety of programming functions, computer gong processing, Dongguan computer gong processing, Shenzhen computer gong processing, mechanical parts processing, Guangzhou computer gong processing, automatic verification and simulation functions. Convenient maintenance and repair: some routine maintenance work is carried out automatically (lubrication, regular inspection of key components, etc.), and the self diagnosis function of CNC machine tool can quickly realize accurate fault location.

3. Computer gong processing is easy to realize mechatronics

The small volume of CNC system control cabinet (using computer, the number of hardware is reduced; the integration of electronic components is higher and higher, and the hardware is constantly decreasing), which makes it possible to combine it with machine tool in physics, reduce the floor area and facilitate operation.

4. Computer gong processing has flexibility and versatility

Most of the functions of mechanical parts processing device are realized by software, and the software and hardware adopt modular structure, which makes the modification and expansion of system functions more flexible. Computer gongs processing Dongguan computer gongs processing Shenzhen computer gongs machining machine parts processing Guangzhou computer gongs processing mechanical parts processing equipment the basic configuration part is universal, different CNC machine tools only configure the corresponding specific functional modules to achieve specific control functions.

5. Computer gong processing has rich functions of numerical control

Interpolation function: quadratic curve, spline, spatial surface interpolation

Compensation function: motion precision compensation, random error compensation, nonlinear error compensation, etc

Man machine dialogue function: dynamic and static tracking display of processing, advanced man-machine dialogue window

What is CNC machining

CNC computer gongs processing refers to the processing with CNC tools. CNC index controlled machine tool is programmed by NC machining language, usually G code.

1. The accuracy of the work is relatively high, and the quality of the processed products is guaranteed.

2. Even if there are multiple coordinates, there is no need to worry, because it can realize the linkage between the coordinates. Computer gong processing, Dongguan computer gong processing, Shenzhen computer gong processing, mechanical parts processing, Guangzhou computer gong processing can process parts with complex geometry structure.

3. It is necessary to replace the processed parts, but only need to change the relevant data to realize the work and simplify the work

4. Because the computer gong is automatic, it can reduce the labor force and increase the productivity.

What is blanking die

Continuous fine blanking die for complex parts is the advanced basic technology of fine blanking technology, which is expected to promote the whole fine blanking technology in China. Taking the synchronizer gear ring, clutch plate, longitudinal compound continuous fine blanking process and die as the breakthrough point, the key technology of fine blanking die design and manufacturing is studied, so as to realize the rapid improvement of fine blanking die technology in China and shorten the gap with advanced countries as soon as possible.

2. Research on key technology of improving die life

Die life is the comprehensive reflection of die material, small craft and supporting product level. Taking the fine blanking die life as the leader to carry out technical research can not only solve the problem that the service life of fine blanking die is too low, but also promote the technological development of die material, fine blanking process, supporting tooling and other auxiliary products.

3. Research and development of composite technology of fine blanking and precision forging

Fine blanking and precision forging are two advanced manufacturing technologies developed in parallel. If the precision stamping part is too thick and needs precision forging, and if the precision forging piece is too thin, it must be fine blanking. The basic idea of developing the composite process of precision forging and fine blanking is to find the combination point of the two processes (such as gear parts with hub and cam parts with short shaft). Precision forging in China has a long history

Development of manufacturing industry

With the development of casting machine tool technology, only through in-depth study of the characteristics and requirements of the finished product process in the user field, and paying attention to the research of basic theoretical work, can China’s foundry machine tool industry have a better development in the near future.

In addition, compared with foreign casting machine tool industry, computer gong processing, Dongguan high-speed computer gong processing, Dongguan mold processing, Dongguan Mechanical parts processing, CNC processing, China’s casting machine tool industry is obviously backward in the production process level, which makes it has obvious deficiencies in the technical level and running speed of core operating parts, the accuracy of finished products and the reliability of machine tools. It can be seen that the development of China’s foundry machine tool industry must start to actively seek new direction and concept.

Revolution becomes a new driving force in the field of casting machine tools

In order to meet the needs of industrial structure adjustment and low-carbon economy development and realize the scientific development of precision casting industry, the following work should be focused on:

1. To cultivate strategic emerging industries and modern production and service industries, so as to adapt to the transformation requirements of downstream areas, and provide support for the stable and rapid development of China’s equipment production industry. Dongguan CNC processing provides the basis for the establishment of modern casting industry system.

2. The network system of education and training in the field of precision casting has been constructed comprehensively. Various forms of school running can effectively cover the whole field of foundry education and training.

3. To help enterprises effectively use WTO and other international rules to deal with trade disputes such as anti-dumping and strive for the right of discourse in the international trade system.

4. Adhering to the principle of “go out, please come in”. On the basis of well running the high-level forum on China’s precision casting industry and the high-level forum on casting industry in mainland China, high-speed computer gongs processing in Dongguan, mold processing in Dongguan, mechanical parts processing in Dongguan, CNC processing, etc., will further improve the high-level forum of Asian casting industry and the high-level forum of BRICs casting industry, and actively participate in the world foundry industry Layer forum.

5. Substantive participation in international standardization work. During the 12th Five Year Plan period, several draft International Foundry specifications formulated by China will be submitted to the international standardization organization.

6. To carry out the National Foundry credit rating evaluation.

The backward process level of casting machine tool is a big bottleneck. Only by breaking this bottleneck, can China’s foundry machine tool industry achieve a substantial breakthrough

How to improve CNC machining accuracy

The maintenance of CNC machining center is very important, not only related to the machining accuracy of workpiece, but also directly affects the machining efficiency of CNC machining center. The maintenance operation points are as follows:

1. Before processing, it is necessary to determine the processing technology, make clear the content of the process card, especially to determine the shape of the parts to be processed, and know the content of the next processing program.

2. The blank size should be measured before clamping, and the blank placement must be carefully checked to see if it is consistent with the programming.

3. After the rough machining of the blank is completed, maintenance should be carried out to determine whether the workpiece is correctly divided? Computer gong processing | Dongguan high-speed computer gong processing | Dongguan mold processing | Dongguan Mechanical parts processing | CNC processing whether there is dislocation loosening? Is the dimension from the processing part to the reference point meet the drawing requirements? After checking, the shape and scale of rough machining should be measured timely and accurately.

4. Semi finish machining or finish machining can only be carried out after rough machining and maintenance is completed. After CNC machining, the technician shall check the shape and size of the machining parts, mainly checking the vertical and inclined processing parts and the base point size marked on the measurement drawing,

When machining with CNC engraving and milling machine, try not to use the maximum cutting capacity of the cutting tool for processing. The cutting tool of each material will have a maximum cutting amount. because

Because this value is only a reference value for users, it can not exceed this value, so in actual operation, try to be less than this value and control it at the value

Two thirds of that would be ideal. In this way, the tool can be used for a long time, and the tool life will be longer.

In addition, CNC engraving and milling machine processing will be

It is divided into two parts: rough machining and finish machining. The first part of rough machining should be faster and better in overall speed and tool selection, and all surplus parts should be cut off as much as possible

In order to save time and improve work efficiency, finishing is to adjust the speed of CNC engraving and milling machine appropriately to ensure the fine processing of products.

And it is a kind of application technology constrained by its own economic strength. Computer gong processing, Dongguan high-speed computer gong processing, Dongguan mold processing, Dongguan Mechanical parts processing, CNC machining center selection, because the price is far more expensive than ordinary machine tools, so it is subject to more constraints, and whether the machine tool selection is reasonable or not is more prominent. Correct selection of machining center is the key to make good use of machining center and make it play an effective role.