Como desenvolver as rotas do processo de edição

How to develop editing process routes

Editing process

As a manufacturer of prototype processing machines, we have modern CNC equipment and are very good at processing parts with more complex structures. Before the part is placed in the machine, the engineer usually simulates the machining process. The following principles are used.

Process route reference editing principles

1.First processing reference surface

The parts in the process must first be worked as a positioning reference surface in order to provide a comparison value for subsequent processes as quickly as possible.

2.Division of processing steps

Surfaces with high processing quality requirements are divided into processing steps. In general, they can be divided into three stages: roughing, semi-finishing and finishing. The objective is mainly to guarantee the quality of processing. This contributes to the rational use of the equipment. It facilitates the organization of the heat treatment process and facilitates the timely detection of defects in raw materials, etc.

3.First surface after drilling

For housing parts, brackets, connecting rods and other parts, the flat surfaces must be machined first before drilling the holes. This can be done by positioning flat surfaces to machine holes to ensure positional accuracy of flat surfaces and holes and to facilitate machining holes on flat surfaces.

4. The finishing process must be done in the final phase

The finishing process of the main surfaces, such as grinding, honing, fine grinding, laminating and other finishing processes, must be carried out in the final stage of the machining process. If the surface roughness of the part is below Ra 0.8 after machining, a slight collision may damage the surface. Direct contact with the part manually or other parts after the finishing process is generally not allowed to avoid surface damage due to transfer between processes and assembly between parts.

Editing process route

After introducing the general situation of the machining process arrangement, the following principles will now be introduced for the occurrence of certain specific situations.

What You Need to Consider When Developing a Machining Process Plan

1. Roughing and finishing separately

Because the workpiece is very large during grinding, the cutting volume of the cutting tool is very large. The part is subject to large cutting and clamping forces, the surface of the part generates a lot of heat, thus causing a stronger surface hardening phenomenon during machining, which creates large internal stresses in the part. When roughing and finishing are performed continuously, the internal stresses of the finished part are redistributed, causing the dimensional accuracy of the part to exceed limits. For some custom machined parts with high precision requirements, the low-temperature annealing or aging process is generally carried out after roughing and before finishing to eliminate the internal stresses of the parts.

2. A sensible selection of equipment

Roughing mainly consists of cutting the machining margin of the workpiece. Machining precision requirements are not very high. Therefore, grinding must be done with a powerful and not very precise machine tool. The finishing process requires high precision from the machine tool. Rough machining and fine machining are carried out by machine tools of different precisions, which not only makes the most of the equipment performance, but also extends the service life of precision machine tools.

3. The heat treatment process is often organized

The arrangement of heat treatment processes can be described as follows:
(1) Annealing, normalizing and tempering before processing can improve the cutting performance of metal.
(2) Aging and tempering treatment after rough machining and before finishing can eliminate the internal stresses of the workpiece.
(3) Carburizing, quenching and tempering after machining can improve the mechanical properties of the part. If the part presents very large deformations after heat treatment, another final machining process must be organized next.

Summary

In the development of the parts machining process, due to the different types of part production, there are very different adding methods, machine tools and equipment, clamps and gauges, blanks and technical requirements for workers.

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