SU1428495A1 - Bending die for making parts of bushing type - Google Patents

Abstract

The invention relates to the processing of metals by pressure, in particular to dies for cold metal. The goal of iioi; i ii; ir is to reduce the quality due to the use of large-scale products with minted joints. Shchamp contains 10-spring-to-10 Yu to the bottom;;; irre 4 mandrels} 16, the onor, parts of which are also springed, and the floor} matrices 3 and 5. In the oyor masts, there are installed nibs 8 for the node-bending edge of the workpiece, interacting with two-wedge wedges (i. When lowering the upper plate of the double mattress 3, the workpiece bends around the mandrel 16. Then the slideways 8 turn in the edges of the slot and the waste. The matrix 5 ends the bend-KV of the product and underlines the joint. 3 HI

Description

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The invention relates to the processing of metals by pressure, in particular to dies for cold forming.

The purpose of the invention is to improve the quality by obtaining accurate products with knockout joints.

FIG. 1 shows the strain at the beginning of the working stroke (the slider at the top dead center); in fig. 2 - stamp in the middle of the stroke of the press ram, at the time of operation of the elements for hemming; in fig. 3 - stamp at the end of the working stroke of the press ram.

The stamp contains the top plate 1 with fastening elements on the slider 2. On the top plate 1, the upper half-matrix 3 is mounted. On the lower plate 4, the lower half-matrix 5 and two-axially are fixed to; Other stops 6 interacting with wedge-shaped bevels 7 elements (sliders) 8 for bending the ends of the workpiece 9. Slides 8 are installed in the transverse grooves 10 of the composite 11s 11. Parts of the support 11 in the lower part are made in the form of rods 12 placed in cylinders 13 installed in openings of the bottom plate 4. The slides 8 are held in the initial position by the return springs 14 and pins 15. A cylindrical mandrel 16 is mounted on the bottom plate 4 on the bottom plate (not shown). Together with the half-matrix 3 and 5, the mandrel 16 forms an annular working cavity hundred constant width. On the support 11 placed the locks 17 of the workpiece 9.

Strain works as follows.

In the initial position, the plate 1 is in its extreme upper position. The workpiece 9 secures it onto the mandrel 16 and the interlocking clamps 17 of the support 11. As the slider moves down, the upper plate 1 through the workpiece 9 acts on the parts of the support 11 that begin to descend. Since the force of the market of the mandrel 16 is greater than the pressure in cylinders 13, the mandrel 16 is held in a vertical position, and the workpiece 9 is bent by a half matrix 3 on the mandrel 16 in an i-shape.

Upon further movement of the half-matrix 3 down, the market force of the mandrel 16 is overcome, and the mandrel 16 begins the opus

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Together with oiio poii 11. At the demise of the oiiopi i 1 1, the sliders 8, which interact with the wedge-shaped bevels 7, and the stops 6, under the action of which are mixed on the mandrel 16, embed the bending of the ends of the workpiece 9 around the mandrel 16.

Upon further movement of the polch matrixes 3 down, the wedge-shaped bevels of 7 nolzuns 8 come out of contact with stops 6 and take up their original position with the help of return springs 14. In this case, the workpiece 9 begins to deform with help. mat 5, which carries out the final bending (embossing) of the workpiece, preliminarily ends its length into the butt joint. Then the semi-matrix 3 and the mandrel 16 is returned to its original position, the finished l-metal is removed. after which the cycle is repeated.

The use of the proposed ppa.na allows to obtain annular products with a high geometrical accuracy in one stroke, with an undercut joint with an increased durability of the dies.

Claims (1)

Invention Formula A bending stamp for the manufacture of sleeve-type parts, comprising a mandrel, upper and lower semi-matrix placed on both sides of the mandrel, elements for bending the ends of the workpiece with wedge ends interacting with stop elements, which are different in axially oriented support, in order to increase quality due to obtaining accurate products with undercuted joints, the bottom matrix is made with a smooth cylindrical stream and is fixed, the support of the elements for nodgibki extract from two the parts placed on both sides of the lower matrix, in parts of the support are made transverse, the elements for bending are mixed in the corresponding transverse grooves, the unordered elements interacting with them are made with a two-wedge working surface and are mounted stationary, and the mandrel is installed with non-displacement along the axis of the strain. .one L Uz