China Shenzhen Perfect Precision Product Co., Ltd. company news

Generally, when machining high-precision parts, the slow wire cutting machine is widely used. This equipment has many varieties, and the operation of each machine tool is much the same. Although some basic operation contents and requirements are similar to those of the fast wire EDM machine tool, the workpiece processing performance of the slow wire EDM machine is much better than that of the fast wire EDM machine. Founded in 2002, Kaifu Company can undertake various kinds of precision CNC processing, small batch processing of aluminum alloy, batch processing of aluminum alloy, CNC production of aluminum alloy parts, aluminum machining, robot metal parts processing. Kaifu Company has more than ten years of rich experience in aluminum alloy CNC precision machining and manufacturing industry. The company has high-precision CNC milling, high-precision CNC lathe, CNC fine carving, sheet metal processing, wire cutting, spark discharge, laser rapid prototyping and vacuum copying and other equipment, an exquisite professional technical team, and a perfect production process and quality control system. Next, Kaifu will introduce the process preparation for the operation of the wire cutting slow threading machine. 1. Technical performance analysis of workpiece materials Different workpiece materials, due to their different melting points and gasification points, cannot be processed in the same way, or products with unsatisfactory quality will be obtained. Therefore, it must be selected according to the actual surface quality. To achieve high precision, it is necessary to select hard alloy materials, not stainless steel or quenched high carbon steel, otherwise it cannot meet the requirements. 2. Selection of working fluid Spark discharge needs to be carried out in a liquid medium with a certain insulating property. The insulating property of the working fluid can allow the discharge point channel after breakdown to be compressed, so as to limit the spark discharge point to a small channel radius, forming instantaneous and local high temperature, so that the metal that has not been gasified can be melted. After the discharge, the discharge gap can be quickly restored to an insulating state. The insulation property is too low to generate electrolysis without forming breakdown spark discharge point; The insulation is too high, the discharge gap is small, the chip removal is difficult, and the speed will be reduced. 3. Selection and Correction of Electrode Wire The electrode wire of slow wire EDM is usually made of brass wire, copper wire, brass plus aluminum, brass plus zinc, etc. For static dense wire EDM, molybdenum wire or tungsten wire can also be used to increase the tension of electrode wire as much as possible under the premise of continuous wire. 4. Processing of threading holes In the actual production and processing, in order to prevent the internal part of the workpiece from participating in the stress deformation and the thermal stress deformation caused by the discharge, both the closed workpieces of the female die type and the punch type workpieces should be processed at the appropriate position first. The threading hole with a certain diameter of the wire cutting slow threading machine tool shall be closed cut to avoid open cutting. 5. Clamping and alignment of workpieces For the workpiece to be processed by the slow wire EDM machine tool, the reference plane shall be determined in the previous processing, and the workpiece can be clamped and aligned correctly on the slow wire EDM machine tool. It is necessary to make full use of machine tool accessories to clamp workpieces. For the clamping of some workpieces with complex structure and easy deformation, special fixtures can be designed and manufactured when necessary.

Generally, when machining high-precision parts, the slow wire cutting machine is widely used. 1、 Definition of drilling Chinese name: drilling English name: drilling Other names: drilling Definition: the method of machining holes on the workpiece when the drilling tool makes relative motion and axial feed motion with the workpiece. Drilling is one of the most basic drilling methods. Drilling is often carried out on drilling machines and lathes, as well as on boring machines and milling machines. Commonly used drilling machines include bench type drilling machine, vertical drilling machine and radial drilling machine. 2、 Features of drilling: Compared with turning excircle, it is much more difficult for drill bit to work locally on the machined surface, which causes some special problems. For example, the rigidity and strength of the drill bit, chip holding and chip removal, guiding and cooling lubrication, etc. can be summarized as follows: 1. The bit is easy to deflect Deflection: refers to the enlargement of the hole diameter, out of round hole or deflection of the hole axis caused by the bending of the drill bit during processing, as shown in Figure 2-6. Cause: Due to inaccurate centering of the cross edge of the drill bit, poor rigidity and guiding effect of the drill bit, the drill bit is easy to offset and bend when cutting. 2. Chip removal is difficult The chip in the hole is relatively wide, and the size of the chip holding groove is limited. When it flows out, it will rub the surface violently with the hole wall, and the hole is forced to roll into a spiral shape. It can cause greater friction between the chip and the hole wall, extrude, roughen and scratch the machined surface, and reduce the surface quality. The chip may even be blocked in the chip holding groove, the drill bit may be stuck or broken, and the tool may wear quickly. In order to improve chip removal conditions, a chip separation groove can be grinded on the drill bit to divide wide chips into narrow strips for chip removal. When drilling deep holes, appropriate deep hole drills shall be used for processing. 3. High cutting temperature As drilling is a semi closed type of cutting, there is a large negative rake angle near the drill core on the main cutting edge and on the horizontal edge. The heat generated during drilling is absorbed by the workpiece. A large number of high-temperature chips cannot be discharged in time. It is difficult to inject cutting fluid into the cutting area, and the cutting heat is not easy to spread. The friction between chip, tool and workpiece is very large, so the cutting temperature is high, the tool wear is large, and the improvement of drilling amount and productivity is limited. 4. Low precision The drilling accuracy is low and the surface is rough. Generally, the machining accuracy is below IT10, the surface roughness Ra value is greater than 12.5mm, and the production efficiency is low. Therefore, drilling is mainly used for rough machining or pre machining. Fig.: Structure of vertical drilling machine and radial drilling machine 3、 Application of drilling In single piece and small batch production, small holes (D

Precision machining is a process of changing the size or performance of a workpiece with machining machinery. According to the temperature state of the workpiece to be machined, it is divided into cold machining and hot machining. Machining at room temperature, which does not cause chemical or physical changes in the workpiece, is called cold machining. Processing at a temperature higher or lower than room temperature will cause chemical or physical changes in the workpiece and is called hot processing. Cold machining can be divided into cutting and pressure machining according to the difference of processing methods. Hot working commonly includes heat treatment, forging, casting and welding. Precision machining surface treatment 1、On the machined surface of the parts, there should be no scratches, abrasions and other defects that damage the surface of the parts. 2、No defects such as black skin, bump, messy buckle and burr are allowed on the machined thread surface. Before painting, all steel parts must be free of rust, oxide, grease, dust, mud, salt and dirt. 3、Before removing rust, remove grease and dirt from the surface of steel parts with organic solvent, alkali, emulsifier, steam, etc. 4、The time interval between the surface to be coated by shot blasting or manual rust removal and the primer coating shall not be more than 6h. 5, riveted parts in contact with each other's surface, before connecting must be coated with a thickness of 30 ~ 40μm anti-rust paint. The edge of the lap joint should be closed with paint, putty or adhesive. The primer damaged due to processing or welding should be repainted.

CNC precision parts processing, refers to the production and processing drawings indicated on the high precision, need to use precision parts processing machinery and equipment to complete. Mechanical processing manufacturers ultra-precision machining machinery and equipment are: CNC machining center, precision surface grinding machine and CNC machine tools, etc.; CNC machining center machine tool itself high precision, high precision, more complex class, small batch mechanical parts processing has technical advantages; precision surface grinding machine is classified as one of the precision parts processing machinery and equipment, usually finishing, mainly for quenching treatment of mechanical parts processing;. CNC machine tools are also automated production machinery and equipment, usually shaft, rod, round type mechanical parts processing, for special precision requirements or small batch mechanical parts processing is relatively more advantageous. CNC machining process and basic working principle. 1、Distinction of process flow and work steps; determination of tool setting point and machining center tool change point. 2、The route of production processing is determined; the choice of processing method and processing scheme is determined. 3, the rational use of machine tools, the number of workpiece accuracy using different models. 4, the installation of parts and the choice of fixtures. 5, the selection of tools and the determination of the cutting dosage. 6, CNC machining parts processability analysis, reasonable processing technology.  

Precision machining is the process of changing the size or performance of a workpiece by a mechanical device. It can be divided into cutting and pressure machining according to the difference in processing methods. The State Council adopted the "equipment manufacturing industry adjustment and revitalization plan", proposed relying on high-speed railroads, coal and metal mining, infrastructure, science and technology major special projects in ten key areas, revitalization of the equipment manufacturing industry; seize the nine key industrial projects, the implementation of equipment autonomy; enhance the four supporting products manufacturing level. Policy measures include strengthening the investment project equipment procurement management, encourage the use of domestic first set of equipment, promote corporate mergers and acquisitions, etc. Precision machining involves the key sectors of economic construction, but also the development of China's machinery industry is in urgent need of a breakthrough in the field, especially high-grade CNC machine tools and mining machinery has long been the weak link in the field of manufacturing in China, with foreign advanced level there is an obvious gap.  

Mechanical spare parts processing of the division of production processing sequential arrangement crankshaft connecting rod own bending stiffness is relatively low, very easy to deformation under the action of external forces; crankshaft connecting rod is a die forging parts, hole machining allowance is large, cutting processing is easy to produce residual stress. Therefore, in the arrangement of the process, should be the main surface of the rough and finish machining processes are separated. In this way, the rough machining deformation can be corrected in the semi-finishing; semi-finishing deformation can also be corrected in the finishing process, Z to achieve the technical standards of the parts, and in the process arrangement first production processing positioning benchmark. Crankshaft connecting rod process can be divided into the following three stages. 1. rough machining stage rough machining stage is also the production processing stage before the crankshaft connecting rod body and cover merge: the purpose is for the datum point processing, mainly including auxiliary tool datum point production processing; production processing in preparation for the crankshaft connecting rod body and cover merge, such as both counterface milling, grinding, etc. 2. Semi-finishing stage semi-finishing stage is also processed after the crankshaft connecting rod body and cover are combined, such as grinding and polishing two planes, semi-finishing large head hole and bore chamfering, etc. In a word, it is for finishing large and small head holes for the preparation period. 3. Finishing stage finishing stage purpose is to ensure that the crankshaft connecting rod is mainly the surface layer - large and small head hole all to achieve the period specified in the drawings, such as honing large head hole, fine boring small head bearing hole

Machining is the process of changing the size or performance of a workpiece by a mechanical device. It can be divided into cutting and pressure machining according to the difference in processing methods.   The production process of machine parts processing refers to the whole process of making products from raw materials (or semi-finished products). For machine production includes the transportation and preservation of raw materials, preparation for production, manufacture of blanks, processing and heat treatment of parts, assembly, and commissioning of products, painting and packaging. Modern enterprises use the principles and methods of system engineering to organize and guide production, and view the production process as a production system with inputs and outputs. In the production process, any process that changes the shape, size, location and nature of the production object to make it a finished or semi-finished product is called a process. It is the main part of the production process. Processes can be divided into casting, forging, stamping, welding, machining, assembly and other processes, machinery manufacturing process generally refers to the sum of the mechanical processing process of parts and machine assembly process, other processes are called auxiliary processes, such as transportation, storage, power supply, equipment maintenance, etc.. Processes are composed of one or several sequential processes, a process consists of a number of work steps.

Precision hardware processing is the raw materials (stainless steel, copper, aluminum, iron ......) The machine can be processed by lathe, milling machine, drilling machine, polishing machine and so on into various high-density parts according to the customer's drawings or samples, such as: screws, motor shafts, model car parts, fishing tackle parts, dog bones. Precision hardware mechanical parts processing process One is according to the production needs of the open material, open after some, such as small parts production can go to the punching machine and then gong cutting or CNC processing processing. This is a lot in the production of glasses accessories auto parts. And do container it is a few is to open the material after punching to go to the welding, and then sand blasting after oil blasting, and then assembled accessories can be shipped. And for small accessories it is also a lot of sanding after the surface out of reason, electroplating or oil spraying. Then burnishing or playing screws assembly packaging shipments.

Non-standard parts are mainly other accessories that are controlled by the company at will without the strict standard specifications set by the state and without the parameters related to them. There are actually many varieties of non-standard parts, and there is no standard classification criteria. Broadly classified as shown below. Metal non-standard parts processing: By the customer to give engineering drawings, the manufacturer according to the drawings using equipment to manufacture the corresponding products, generally are the majority of the mold, tolerance requirements, finish is all prescribed by the customer, there is no such paradigm. The product from casting to finishing completely requires the corresponding quality control, the process is intricate and complex and highly variable, usually costing more than standard parts. Non-metallic non-standard parts processing. It is the processing of some non-metallic materials. For example, plastic, wood, stone, etc. In recent years, the injection molding industry, the continuous development of plastic molds increasingly sophisticated, surface design, programming CNC references, so that the cost of non-standard processing and tolerance levels have been significantly improved.

CNC lathe feed production processing route refers to the turning tool from the tooling point (or machine tool fixed origin) to start the movement, until the point of return and end of the production processing program through the route, including the route of cutting processing and tool cutting, cutting out and other non-cutting empty stroke path. Most of the feed route of finishing is along the contour of its parts in turn, thus, the main point of the work to clarify the feed route is to clarify the roughing and empty stroke feed route (cnc precision parts machining).   In the CNC machine tool processing (cnc precision parts machining), the production of processing routes should generally be clear to follow the following principles. ① reason should be able to ensure the accuracy and surface roughness of the workpiece being produced and processed. ② make the production processing route is the shortest, reduce the empty travel time, improve production processing efficiency. ③Simplify the numerical calculation workload as much as possible, and simplify the production processing procedure. ④For some programs that are used repeatedly, subroutines should be used.