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Template design (3)

Update:03-01-2020
Summary:

Inlay Round or square recesses are processed in the tem […]

Inlay
Round or square recesses are processed in the template, and block-shaped parts are embedded and embedded in the template. This template is called an embedded structure. This structure has less cumulative tolerances, high rigidity, and reproducibility during decomposition and assembly. good. Due to its advantages such as easy machining, machining accuracy determined by the work machine, and few final adjustments, the inlay template structure has become the mainstream of precision stamping dies, but its disadvantage is that it requires a high-precision hole processing machine.
When the continuous stamping die adopts this template structure, in order to make the template have high rigidity requirements, the empty station is designed. The precautions for insert formwork construction are as follows:
(1) Embedded hole processing: The vertical hole milling machine (or jig milling machine), integrated processing machine, jig boring machine, jig grinding machine, wire-cut electrical discharge machining machine, etc. are used for the embedded hole processing of the template. For machining standards for embedding holes, when using a wire-cut electrical discharge machine, in order to improve its machining accuracy, two or more wire-cut operations are performed.
(2) Fixing methods of inserts: The determinants of fixing methods of inserts include the accuracy of processing, the ease of assembly and disassembly, the possibility of adjustment, and so on. There are four ways to fix the inserts: A. Fix with screws, B. Fix with shoulders, C. Fix with toe blocks, D. Press the upper part with plates. The method of fixing the insert of the concave template also uses press-fitting. At this time, the loosening result due to processing thermal expansion should be avoided. When using the circular mold insert to process irregular holes, a method of preventing rotation should be designed.
(3) Considerations for assembly and disassembly of inserts: The inserts and their cavities must be processed with high precision for assembly operations. In order to obtain adjustments during assembly even if there is a slight dimensional error, it is advisable to consider solutions in advance. The specific considerations for the processing of inserts include the following five items: A. There is a press-in introduction part, B. The insert is adjusted by a spacer. The pressed state and correct position of the part, C. The insert has a hole for pressing out on the bottom surface. D. It is recommended to use screws of the same size when tightening with screws to facilitate locking and loosening. E. To prevent assembly Mistakes should be designed to prevent dull chamfering.

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