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Dual positive clearance blanking method

A gap and dual technology, applied in the field of stamping process separation processing, can solve the problem of not finding a higher shear surface

Inactive Publication Date: 2006-05-24
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In conclusion, so far, in the prior art, no method has been found to obtain a higher shear surface under ordinary blanking conditions

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0024] This embodiment is punching in the method of the present invention, that is, to make a continuous step-shaped punch to form double positive gaps (C1 and C2) between it and the die, and attach figure 1 It is the punching schematic diagram of this embodiment, with Figure 5 It is a schematic diagram of the punching section of this embodiment. Present embodiment is to use two kinds of materials that thickness is 4mm, implements on 100KN ordinary press, and workpiece diameter is φ 20mm. The process conditions and results are shown in Table 1.

[0025] serial number

[0026] For ordinary blanking under the same blanking conditions (material, material thickness, press), when C is 0.1t, the height of the shear surface of the pure aluminum plate is less than 1.5mm, and the height of the shear surface of the brass plate is less than 1.0mm.

Embodiment 2

[0028] This embodiment is blanking in the method of the present invention, that is, to make a continuous step-shaped die to form double positive gaps (C1 and C2) between it and the punch, and attach figure 2 It is the blanking schematic diagram of this embodiment, with Figure 5 It is a schematic diagram of the punching section of this embodiment. Present embodiment is to use two kinds of materials that thickness is 4mm, implements on 100KN ordinary press, and workpiece diameter is φ 20mm. The process conditions and results are shown in Table 2.

[0029] serial number

[0030] For ordinary blanking under the same blanking conditions (material, material thickness, press), when C is 0.1t, the height of the shear surface of the pure aluminum plate is less than 1.5mm, and the height of the shear surface of the brass plate is less than 1.0mm.

Embodiment 3

[0032] This embodiment is punching in the method of the present invention, that is, to make a continuous step-shaped punch to form double positive gaps (C1 and C2) between it and the die, and attach figure 1 It is the punching schematic diagram of this embodiment, with Figure 5 It is a schematic diagram of the punching section of this embodiment. Present embodiment is to use two kinds of materials that thickness is 6mm, implements on 250KN ordinary press, and workpiece diameter is φ 20mm. The process conditions and results are shown in Table 3.

[0033] serial number

[0034] For ordinary punching under the same blanking conditions (material, material thickness, press), when C is 0.1t, the height of the shear surface of the pure aluminum plate is less than 2.5mm, and the height of the shear surface of the brass plate is less than 1.5mm.

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PUM

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Abstract

The present invention relates to a double forward clearance blanking method. The male die or female die of said die equipment can be made into continuous step form, and its is characterized by that the height h of the step is 1 / 3-1 / 2 of the thickness t of material to be blanked, between male die and female die the double forward clearances are formed, clearance C1=(0.125-0.20)t, and the clearance C2=(0.02-1.10)t. Under the condition of general blanking die, general blanking clearance and general pressing machine said invention can raise shearing surface height of blanking piece section in once blanking stroke.

Description

technical field [0001] The invention belongs to a stamping process separation processing method in metal plastic forming technology. Background technique [0002] The blanking process is one of the most traditional and widely used stamping processing methods. The section of the blanking part consists of 4 parts, including the collapse angle, the shear surface, the fracture surface and the burr. The height of the shear plane of the fracture surface of the punching part has a great relationship with the gap: if the punching gap is moderate, for thin plate parts, the height of the shear plane of the punching part section can reach 1 / 3 or even 1 / 3 of the thickness of the material. 2, but the height of the shear surface should reach 1 / 2 of the material thickness and it is not stable; for thick plate parts, it is difficult to stabilize the height of the shear surface at 1 / 3; if the gap is too small, the shear The surface will increase, but the secondary shear surface often appea...

Claims

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Application Information

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IPC IPC(8): B21D28/02B21D28/14
Inventor 卢险峰胡志鹏戴源德李湖峰揭小平谭欣珍徐明发
Owner NANCHANG UNIV
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