CN100398239C - Bar stock precision shearing die - Google Patents

Abstract

The invention relates to a bar stock precision shearing die, which belongs to a bar stock precision shearing die used on a general press. The invention mainly solves the technical difficulties of low precision blanking, poor cross-section quality of the blank and many cross-section defects existing in the shearing bar of the existing press. The task of the present invention is achieved like this: this bar stock precision shearing die, it comprises lower template, lower fixed knife rest, lower blade, upper template, upper fixed knife rest and upper blade, wherein: it also includes by upper clamping block , the upper clamping device consisting of the upper clamping spring, the upper connecting bolt and the upper fixing block and the lower clamping device consisting of the lower clamping block, the lower clamping spring, the lower connecting bolt and the lower fixing block; the upper clamping device is set On the right side of the upper template; the lower clamping device is set on the left side of the lower template. The invention has the advantages of high blanking efficiency, good section quality, less section defects and the like.

Description

Bar stock precision shearing die

technical field

The invention relates to a bar precision shearing die, which belongs to a bar precision shearing die used on a general press.

Background technique

At present, in the field of mechanical processing, the blanking of bars still adopts the method of shearing by a press. Although this method has the advantages of high blanking efficiency and low material loss rate. However, because the mold cannot be used for cutting and blanking, the use of this press cannot improve the section quality of the precision forging blank and reduce the cutting deformation. Therefore, it has the disadvantages of low blanking precision, poor cross-sectional quality of the blank and many cross-sectional defects of cutting.

Contents of the invention

The purpose of the present invention is to solve the technical difficulties of low precision blanking blank, poor section quality of the blank and many section defects in the shearing bar of the existing press, and to provide a high blanking efficiency, good section quality, A bar precision shearing die that has few defects and can be used directly on a press.

The task of the present invention is achieved like this: design a bar stock precision shearing die that can be used on common press, this bar stock precision shearing die, it comprises lower template, is located at the lower fixed knife rest of lower template right side, is located at The lower blade at one corner of the lower fixed knife rest; the upper template, the upper fixed knife rest arranged on the left side of the upper template, and the upper blade arranged at one corner of the upper fixed knife rest, wherein: it also includes an upper clamping block, an upper clamping spring, The upper clamping device consisting of the upper connecting bolt and the upper fixing block and the lower clamping device consisting of the lower clamping block, the lower clamping spring, the lower connecting bolt and the lower fixing block; The blocks are connected together, the upper clamping spring is set between the upper clamping block and the upper fixing block, and the upper clamping device is set on the right side of the upper template; the lower clamping block is connected with the lower fixing block through the lower connecting bolt, The lower clamping spring is set between the lower clamping block and the lower fixing block, and the lower clamping device is set on the left side of the lower template; the upper clamping device and the lower clamping device are set on the same mold as the upper blade and the lower blade and move together , with the increase of the upper blade and lower blade cutting stroke, the radial clamping force of the upper clamping device and the lower clamping device increases accordingly.

Because the present invention has adopted the structure that the spring provides the required radial clamping force when shearing bar stock, and the mechanism of this radial clamping force is arranged on the same mould, so compared with the background technology , has the following advantages:

1. The mechanism of radial clamping force and the shearing tool are set on the same mold, which saves a special clamping device, so that the present invention can be used on a mechanical press or a friction press, saving production costs and improving Cutting efficiency.

2. Since the radial clamping force mechanism and the shearing tool are set on the same mold, and the radial clamping force mechanism of the upper mold corresponds to the shearing tool of the lower mold, the radial clamping force of the lower mold The mechanism corresponds to the shearing tool of the upper die. When shearing the bar, under the action of the radial clamping force mechanism, the shear deformation of the bar is reduced, the quality of the section is improved, and the defects of the section are reduced.

Description of drawings

Accompanying drawing is the structural representation of the present invention.

Detailed ways

As shown in the accompanying drawings, the bar stock precision shearing die in this embodiment includes a lower template 1, a lower fixed knife rest 3 mounted on the right side of the lower template 1 through bolts 2, and a lower blade 4 arranged at a corner of the lower fixed knife rest 3 Upper formwork 10, be located at upper fixed knife rest 13 on the left side of upper formwork 10 by bolt 12, be located at the upper blade 14 of upper fixed knife rest 13 corners, wherein: it also comprises by upper clamping block 6, upper clamping The upper clamping device that spring 7, upper connecting bolt 8 and upper fixing block 9 constitute and the lower clamping device that is made of lower clamping block 15, lower clamping spring 16, lower connecting bolt 17 and lower fixing block 18; The clamping block 6 is connected with the upper fixing block 9 through the upper connecting bolt 8, the upper clamping spring 7 is arranged between the upper clamping block 6 and the upper fixing block 9, and the upper clamping device is mounted on the upper template 10 through the bolt 11. Right side; the lower clamping block 15 is connected with the lower fixing block 18 through the lower connecting bolt 17, the lower clamping spring 16 is arranged between the lower clamping block 15 and the lower fixing block 18, and the lower clamping device is arranged on the lower clamping device through the bolt 19. Left side of Template 1.

The working principle of the present invention is: before cutting, the slide block of the press is lifted up, so that the upper module mounted on the slide block is separated from the lower module mounted on the lower working platform, and the bar is sent to the lower fixed knife rest 3 through the transmission device. At the arc-shaped cutting edge, the stopper device makes it positioned. When shearing, the slide block of the press moves down, and the upper and lower modules are closed. When the upper clamping block 6 and the upper fixed knife rest 13 are in contact with the bar, under the action of the upper clamping spring 7 and the lower clamping spring 16, Make the upper clamping device and the lower clamping device start to generate radial clamping force. With the increase of the shearing depth of the upper blade 14 and the lower blade 4, the force of the upper clamping spring 7 and the lower clamping spring 16 gradually increases, and the radial clamping force increases accordingly, so as to reduce the deformation of the shearing section of the bar. out of shape. After the upper blade 14 and the lower blade 4 complete the cutting, the slider of the press moves upward, driving the upper module to rise, and the lower clamping block 15 in the lower module drives the sheared lower bar to move upward under the rebound action of the lower clamping spring 16 , after the upper and lower modules are completely separated, the stop rod of the stop device retracts, the subsequent bar is fed in, the cut bar is pushed out, and then enters the next shearing work.

Claims (1)

1. A bar stock precision shearing die, which comprises a lower template, a lower fixed knife rest arranged on the right side of the lower template, a lower blade arranged at a corner of the lower fixed knife rest; an upper template, an upper fixed knife rest arranged on the left side of the upper template , the upper blade located at one corner of the upper fixed tool holder is characterized in that it also includes an upper clamping device consisting of an upper clamping block, an upper clamping spring, an upper connecting bolt and an upper fixing block and a lower clamping block, The lower clamping device consists of the lower clamping spring, the lower connecting bolt and the lower fixing block; the upper clamping block is connected with the upper fixing block through the upper connecting bolt, and the upper clamping spring is arranged between the upper clamping block and the upper fixing block The upper clamping device is set on the right side of the upper template; the lower clamping block is connected with the lower fixing block through the lower connecting bolt, the lower clamping spring is set between the lower clamping block and the lower fixing block, and the lower clamping device It is located on the left side of the lower template; the upper clamping device and the lower clamping device are set on the same mold as the upper blade and the lower blade and move together. With the increase of the cutting stroke of the upper blade and the lower blade, the upper clamping device and the lower blade The radial clamping force of the clamping device increases accordingly.

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