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What are the rules for the process of mold parts

The first is to formulate the processing of parts, then determine the process dimensions, equipment, as well as cutting specifications and man-hour quotas. These two steps are interrelated and should be comprehensively analyzed.

The preparation of the process route is to lay out the overall layout of the process. The main task is to select the processing methods for each surface, determine the processing sequence for each surface, and the number of processes.

General principles for formulating process routes

1, first processing datum

During the processing of parts, the surface as a reference for positioning should be processed first so as to provide a datum reference for the processing as soon as possible. Called "make datum first."

2, divide the processing stage

Surfaces with high processing quality requirements are divided into three stages: rough machining, semi-finishing and finishing. It is mainly to ensure the quality of processing; it is conducive to the rational use of equipment; it is convenient for arranging heat treatment processes so that convenient to find rough defects.

3, Do the platting before the hole

[1] For the box, brackets, connecting rods and other parts, the plane should be processed first before the processing hole. In this way, to ensure the accuracy of the position of the plane and the holes, and the processing of the holes in the plane can be facilitated.

4, finishing

Finished workpieces

The finishing of the main surface (such as grinding, honing, fine grinding, rolling, etc.) should be carried out in the final stage of the process. The surface finish after processing is under Ra0.8um. A slight collision can damage the surface. In Japan, Germany, and other countries, after finishing, they must be protected by flannel. It is absolutely not allowed to directly touch the workpiece with hands or other objects, so as to avoid the surface being polished and damaged due to the transfer and installation between processes.

The processing of parts is the forming and blanking tools, as well as shearing and die cutting dies. Under normal circumstances, the mold has two parts: the upper mold and the lower mold. The steel plate is placed between the upper and lower molds, and the material is formed under the action of a press. When the press is opened, the workpiece determined by the shape of the mold is obtained or the corresponding scrap is removed.

Arrangement of mold processing as below:

(1) To process the bottom surface, it is necessary to ensure the processing quality;

(2) To find the standard for casting blanks and to check the margin of 2D and 3D surfaces;

(3) Roughing of 2D and 3D profiles, and non-installation of non-working planes, including safety platforms, side reference surfaces, etc;

(4) The side reference plane is aligned to ensure machining accuracy;

(5) Semi-finishing the 2D and 3D surfaces, finishing the installation work surface, including contact surfaces, mounting surfaces, work surfaces, etc.;

(6) Semi-finishing various guide surfaces and guide holes, leaving a certain margin on the reference hole and height reference surface of the finishing process, and recording the data;

(7) Inspection and review of machining accuracy, and then insert operation;

(8) Datum is to be checked before finishing, but also for the insert allowance;

(9) Finishing of 2D and 3D profiles, as well as lead surfaces and lead holes;

(10) The final inspection and review of the machining accuracy are finalized to confirm that there are ok or not.

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