SU1393504A1 - Method of finish blanking and punching - Google Patents

Abstract

The invention relates to the processing of metals by pressure, in particular to the processing of sheet metal. The goal is to improve the quality of products. To do this, tool 2 squeezes a portion of the workpiece material into the hole in the die 1 while applying compressive forces to the waste. Effort is provided by the precipitation of waste 6 between the die and the tool. The final separation of waste is carried out by shifting the central part of the workpiece, which is provided as a result of local deformation of the tool. As a result, the possibility of the formation of a rough cleaved area is eliminated, which reduces the complexity of the process. 1 il.

Description

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The invention relates to the processing of metals by pressure, in particular to the processing of sheet metal.

The purpose of the invention is to improve the quality of products by eliminating the rough cleavage zone and reducing the complexity of the process.

The drawing shows the scheme of implementation of the method - in the left part in the intermediate stage of the process, in the right part - in the final stage.

The matrix 1 is made of tool materials with inclined working edges forming a sharp edge. Flat plate 2 (tool) is made of materials that allow its local deformation. For installation of the matrix serves as a backing plate 3. The drawing also shows the workpiece 4; item 5; waste 6.

The method is carried out as follows.

The workpiece A is placed on the die. When lowering the movable parts of the device downward, tool 2 squeezes a part of the workpiece material into the hole of the die 1 while compressing forces applied to the waste, provided by the draft of waste 6 between the die 1 and tool 2. Final separation of waste 6 is carried out by shifting the central part of the workpiece 4, which is provided as a result of the local deformation of the tool 2, as shown on the right side of the drawing.

When the moving parts go up, the allowance (waste) b is removed from the matrix 1, and the finished part 5 is removed from the plate 3, raising the matrix 1.

The method has the following advantages: firstly,

soba, as it does not require complex stamps.

Example. Conducted cutting, punching parts made of aluminum alloys AMtsM, AD1, D 16M, copper M2, brass L68 and other alloys with a thickness of 4 mm. The diameter of the hole in the matrix is 15 mm, and the front corner of the matrix is assigned in the range of 30-50. A 23 mm wide strip is used as a blank. The device uses a thermoplastic mass instrument.

including polypropylene

01020, low pressure polyethylene, polyamide P610, etc.

A deforming force is applied to the tool until the stock is completely separated. There is no local deformation on the cut parts. The roughness of the cut surface reaches Ra 0.32-0.16 μm, and the rough cleavage zone is absent. The application of the proposed technical solution allows to improve the cut quality of the parts obtained by sheet punching, and thereby reduce the laboriousness of their manufacture, since no subsequent

finishing surfaces of parts. At the same time, the implementation of the method requires simplified equipment, which expands the scope of application of the method.

Claims (1)

Invention Formula The method of finishing cutting, punching out parts from sheet material by pressing a part of the material in the hole, settling waste and separating the part from the waste by shear, characterized in that, in order to reduce the labor intensity of the process and improve the quality of products by eliminating the rough cleaved area, the quality of the cut by eliminating the scaling and sedimentation of the waste of the cleaved cleavage zone achieved continuously until the complete removal of the well-being of the part by shear, at the cut-off state in the cut zone; there is a local plastic strain second of the second plastic strain in the second section; implement tooling in the zone of precipitation.