The main templates of continuous molds include punch fixing plate, pressing plate, mother plate and so on. The structure design depends on the precision of stamping products, the quantity of production, the processing equipment and processing method of the mold, the maintenance method of the mold, etc. Form: (1) monolithic, (2) yoke, (3) inlaid. FHM fence factory provides a variety of Triangle Bending Welded Wire Fence to support your selling.You could have a multiple choice here.The Bending Welded Wire Fence is a structure that circles the perimeter of an area to prevent access. These fences are frequently made out of single vertical metal bars connected at the top and bottom with a horizontal bar.
The main templates of continuous molds include punch fixing plate, pressing plate, mother plate and so on. The structure design depends on the precision of stamping products, the quantity of production, the processing equipment and processing method of the mold, the maintenance method of the mold, etc. Form: (1) monolithic, (2) yoke, (3) inlaid.
Monolithic
A monolithic formwork is also known as a one-piece construction and its machined shape must be closed. The monolithic formwork is mainly used for simple structures or molds with low precision. The processing method is mainly for cutting (no heat treatment is required), and the heat treatment template must be subjected to wire cutting or electric discharge machining and grinding. In the case of a long template size (continuous mold), two or more integrated types will be used.
Yoke
The central portion of the yoke template is processed into a groove shape to assemble a block product. The structure depends on the application requirements, and the groove portion can be formed by other templates. The advantages of the yoke formwork are that the groove portion is easy to process, the groove portion width can be adjusted, and the machining accuracy is good. But low rigidity is its shortcoming.
The design considerations for the yoke template are as follows:
(1). The yoke plate structure and the block part are fitted with a middle fit or a light fit. If the press fit is used, the yoke plate will be changed.
(2) The yoke plate and the retaining function of the block parts must have sufficient rigidity to withstand the side pressure and the surface pressure of the block parts. Further, in order to make the yoke groove portion and the block portion tightly combined, the groove portion angle is made into a relief process, and if the yoke groove portion angle cannot be made into a relief process, the block portion must be made into a relief process.
(3). The division of the block parts should take into account the shape of the interior, and the datum must be clarified. In order to prevent deformation during stamping, attention should also be paid to the shape of each block.
(4) When the yoke plate is assembled into a plurality of block-shaped parts, the pitch is varied due to the processing error of the block parts, and the countermeasure is that the intermediate block parts are designed to be adjustable.
(5). The mold structure in which the block parts are combined side by side, the block parts are subjected to the side pressure during the punching process, and a gap is formed between the block parts or the block parts are inclined. This phenomenon is an important cause of poor stamping, punching and chipping, etc., and therefore sufficient countermeasures must be taken.
(6). The fixing method of the block parts in the yoke plate has the following five types according to its size and shape: A. fixed by a locking screw, B. fixed by a key, C. fixed by a key, D. shoulder The part is fixed, E. The above pressing parts (such as the guide plate) are pressed and fixed.
3. Mounted
The circular or square recess is machined in the formwork, and the block part is embedded in the formwork. This type of formwork is called a built-in structure. This structure has less cumulative tolerance, high rigidity, and precision reproducibility during decomposition and assembly. good. The inlaid formwork structure has become the mainstream of precision stamping dies because of its advantages of easy machining, machining accuracy determined by the working machine, and minimal adjustment. However, the disadvantage is that it requires a high-precision hole machining machine.
When the continuous stamping die is constructed using this formwork, the empty station is designed to make the formwork have high rigidity requirements. The precautions for the inlaid template construction are as follows:
(1). Processing of embedded holes: The vertical hole milling machine (or fixture milling machine), integrated processing machine, fixture boring machine, jig grinding machine, wire cutting electric discharge machine, etc. For the machining standard of the embedded hole, when the wire-cut electrical discharge machine is used, the wire cutting process is performed twice or more in order to improve the machining accuracy.
(2). Fixing method of insert: The determinant of the method of fixing the insert does not change the precision of the processing, the ease of assembly and decomposition, and the possibility of adjustment. There are four ways to fix the insert: A. fixed by screws, B. fixed by shoulders, C. fixed by toe blocks, and D. upper parts are pressed by plates. The method of fixing the insert of the mother template also adopts the press-fit cooperation. At this time, the slack result caused by the thermal expansion of the processing should be avoided, and the method of preventing the rotation should be designed when the irregular cavity is processed by the circular mold insert.
(3). Considerations for assembly and disassembly of inserts: Inserts and their cavities require high precision for assembly work. In order to obtain adjustment even when there is a slight dimensional error, it is advisable to consider the countermeasures in advance. The specific considerations for the processing of the inserts are as follows: A. There is a press-in introduction, B. The pressing state and the correct position of the piece, the bottom surface of the C insert is provided with a hole for pressing out, D. When the screw is locked, the same size screw should be used for locking and loosening, E. To prevent mistakes in the direction of assembly Should be designed to prevent dull chamfering.
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