What are the main processes of mechanical processing? Specific

What does mechanical processing mainly process? Specifically

Mechanical processing mainly processes the parts we need, such as: bicycle parts, automobile parts, aircraft All the parts we want to get belong to the category of machining. Of course, machining is just the process of realizing the final product.

Commonly used mechanical processing devices include digital display milling machines, digital display forming grinders, digital display lathes, EDM machines, universal grinders, machining centers, laser welding, medium wire running, fast wire running, slow wire running, External cylindrical grinders, internal cylindrical grinders, precision lathes, etc. can perform turning, milling, planing, grinding, etc. of precision parts. This type of machinery is good at turning, milling, planing, grinding, etc. of precision parts, and can process various irregularities. Shape parts, processing accuracy can reach 2μm.

Production process

The production process of a machine refers to the entire process of making products from raw materials (or semi-finished products). For machine production, it includes the transportation and storage of raw materials, production preparation, blank manufacturing, parts processing and heat treatment, product assembly and debugging, painting and packaging, etc. The content of the production process is very extensive. Modern enterprises use the principles and methods of systems engineering to organize and guide production, and regard the production process as a production system with input and output. It can make enterprise management scientific and make enterprises more adaptable and competitive.

In the production process, any process that changes the shape, size, position and nature of the production object to make it a finished product or semi-finished product is called a process. It is a major part of the production process. The process can be divided into casting, forging, stamping, welding, machining, assembly and other processes. The mechanical manufacturing process generally refers to the sum of the machining process of parts and the assembly process of the machine. Other processes are called auxiliary processes. Processes such as transportation, storage, power supply, device maintenance, etc. The process is composed of one or several sequential processes. A process consists of several work steps, and one work step consists of several tool passes.

The process is the basic unit of the mechanical processing process. The so-called process refers to that part of the process that is continuously completed by a worker (or a group of workers) on a machine tool (or a working place) on the same workpiece (or on several workpieces at the same time). The main characteristics of a process are that the processing objects, devices and operators do not change, and the content of the process is completed continuously.

The working step is that part of the process that is completed continuously under the conditions of unchanged processing surface, unchanged processing tools, and unchanged cutting amount.

Tool feed, also called work stroke, is the work step completed by the processing tool once on the processing surface.

To formulate a mechanical processing process, it is necessary to determine how many processes the workpiece will go through and the order in which the processes are carried out. A brief process that only lists the names of the main processes and their processing sequence is called a process route.

The formulation of the process route is to formulate the overall layout of the process. The main task is to select the processing method of each surface, determine the processing sequence of each surface, and the number of processes in the entire process. The process route formulation must follow certain principles.

General principles for formulating process routes:

1. Process the datum surface first: During the processing of the part, the surface as the positioning datum should be processed first so that it can be processed as soon as possible for subsequent processes. Processing provides precise benchmarks. It's called "baseline first."

2. Divide the processing stages: Surfaces with high processing quality requirements are divided into processing stages, which can generally be divided into three stages: rough machining, semi-finishing and finishing. Mainly to ensure the processing quality; to facilitate the rational use of equipment; to facilitate the arrangement of heat treatment processes; and to facilitate the detection of blank defects, etc.

3. Surface first and then holes: For parts such as boxes, brackets and connecting rods, the planes should be machined first and then the holes should be machined. In this way, the hole can be processed in a plane position, ensuring the position accuracy of the plane and the hole, and making it convenient to process the hole on the plane.

4. Finishing processing: Finishing processing of the main surface (such as grinding, honing, fine grinding, rolling processing, etc.) should be carried out at the last stage of the process route. The surface finish after processing should be Ra0 Above .8um, slight collision will damage the surface. In countries such as Japan and Germany, after finishing processing, flannel must be used to protect it. It is absolutely not allowed to touch the workpiece directly with hands or other objects to avoid damaging the surface after finishing. Damage due to transfer and installation between processes.

Other principles for formulating process routes:

The above is the general situation of process arrangement. Some specific situations can be handled according to the following principles.

(1) In order to ensure processing accuracy, it is best to carry out roughing and finishing separately. Because during rough machining, the cutting amount is large, the cutting force and clamping force on the workpiece are large, the heat is large, and the machined surface has significant work hardening, and there is large internal stress inside the workpiece. If rough machining If carried out continuously, the accuracy of the finished parts will be quickly lost due to the redistribution of stress. For some parts that require high processing accuracy. After rough machining and before finishing machining, low-temperature annealing or aging treatment procedures should also be arranged to eliminate internal stress.

(2) Choose devices rationally. Rough machining mainly involves cutting off most of the machining allowance and does not require high machining accuracy. Therefore, rough machining should be performed on a machine tool with higher power and less precision. The finishing process requires the use of higher precision machine tools. Machine tool processing. Roughing and finishing are processed on different machine tools respectively, which can not only give full play to the device capabilities, but also extend the service life of precision machine tools.

(3) In the mechanical processing process route, a heat treatment process is often arranged. The heat treatment process positions are arranged as follows: In order to improve the cutting performance of metals, such as annealing, normalizing, quenching and tempering, etc., they are generally arranged before mechanical processing. In order to eliminate internal stress, such as aging treatment, quenching and tempering treatment, etc., they are generally arranged after rough machining and before finishing machining. In order to improve the mechanical performance of parts, carburizing, quenching, tempering, etc. are generally arranged after mechanical processing. If there is a large deformation after heat treatment, the final processing process must be arranged

When formulating the process of the part, due to the different production types of the part, the processing method, machine tool device, work clamp measuring tool, The blanks and technical requirements for workers are all very different.

I don’t know if the above content can help you! What are the main processes of mechanical processing? Specific points

Turning, milling, boring, planing, and drilling are all mechanical processing. It is just a matter of deciding which process to use for different products and requirements. What are the main processes of mechanical processing? Asking for introduction

Mechanical processing mainly processes the parts we need. For example, Qingdao Dongzhan Electrical Equipment processes bicycle parts, car parts, airplanes, etc. All the parts we can think of belong to machinery. The scope of processing, of course, machining is only the process of achieving the final product. What exactly is profiling in machining?

A special device that allows the workbench or tool holder to move along with the template curve to process the workpiece according to the template curve. . . What are the main tools for machining?

Tools can be divided into five categories according to the form of the workpiece's surface to be processed. Tools for processing various external surfaces, including turning tools, planers, milling cutters, external surface broaches and files, etc.; hole processing tools, including drill bits, reamers, boring tools, reamers and internal surface broaches, etc.; thread processing Tools, including taps, die, automatic opening and closing thread cutting heads, thread turning tools and thread milling cutters; gear processing tools, including hobs, gear shaper cutters, shaving cutters, bevel gear processing tools, etc.; cutting tools, including inserts Toothed circular saw blades, band saws, hack saws, cut-off turning tools, saw blade milling cutters and more. In addition, there are combination knives. Cutting tools can be divided into three categories according to the cutting motion mode and the corresponding blade shape. General tools, such as turning tools, planers, milling cutters (excluding formed turning tools, forming planers and forming milling cutters), boring tools, drill bits, reamers, reamers and saws; forming tools, the cutting edges of such tools Have the same or nearly the same shape as the cross section of the workpiece to be processed, such as forming turning tools, forming planers, forming milling cutters, broaches, cone reamers and various thread processing tools, etc.; generating tools use the generating method to process gears Tooth surfaces or similar workpieces, such as hobs, gear shapers, gear shaving cutters, bevel gear planers and bevel gear milling cutters, etc. Tool materials are roughly divided into the following categories: high-speed steel, cemented carbide, cermet, ceramics, polycrystalline cubic boron nitride and polycrystalline diamond.

I mainly mention ceramics. Ceramics were used in cutting tools earlier than cemented carbide, but due to their brittleness, their development was very slow. However, it has developed relatively rapidly since the 1970s. There are two main series of ceramic tool materials, namely alumina series and silicon nitride series. As a cutting tool, ceramics have the advantages of low cost, high hardness, high temperature resistance, etc., and have good prospects. It should be called cutting tools. At present, domestic and foreign products are very different. Cutting tools are considered high-tech consumer goods!

What tools are needed for machining? Please be specific. Thank you

Friends, let’s do processing. At least you need a lathe, grinder, cutting tools, measuring tools, and other spare parts. If you have money, you can buy turning machines, milling machines, drilling machines (grinders, slotting machines, etc.). The more the better. Welding machines and cutting machines. Vise, tool table. Calipers, micrometers, universal angle rulers, and other measuring tools, various turning tools, milling cutters, drill bits, etc., transportation tools! Individual business license. When you receive a task, you call in people and start work. The specific parameters of the free tolerance of machining

The unmarked tolerance level of machining is specified as IT12 to IT18. Generally, + difference is used for holes, - difference is used for shafts, and ± difference is used for other linear dimensions.

The linear dimensional free tolerance levels are divided into precision level f, medium level m, rough level c and the coarsest level v. The specific details of machining with one tool

One clamping and one tool processing is completed