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Method for eliminating bottom through-hole burr of processed deep cylindrical work pieces and dedicated male die therefor

A technology of deep cylindrical parts and punches, applied in the field of stamping processing, to achieve the effects of reducing the deburring process after machining, low manufacturing cost and easy implementation

Inactive Publication Date: 2006-07-12
CHANGAN AUTOMOBILE (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the burrs produced by processing the through holes at the bottom of deep cylindrical workpieces cannot be removed by the above method

Method used

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  • Method for eliminating bottom through-hole burr of processed deep cylindrical work pieces and dedicated male die therefor
  • Method for eliminating bottom through-hole burr of processed deep cylindrical work pieces and dedicated male die therefor
  • Method for eliminating bottom through-hole burr of processed deep cylindrical work pieces and dedicated male die therefor

Examples

Experimental program
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Effect test

Embodiment Construction

[0017] see figure 2 . Take the extrusion die. The extrusion die is composed of a special punch 2, a die 3 and a bottom punch 4 for eliminating the burrs of the bottom through hole of the deep cylindrical workpiece. The working part of the punch 2 is provided with a circular protrusion 5 with a taper, and its taper is α = 5° ~ 60°; the upper end of the protrusion and the inner wall are arc surface transitions, and the radius of the arc surface is r = R0 .5 ~ R2. The shape of the protrusion corresponds to the shape of the groove at the bottom of the cavity of the deep cylindrical workpiece.

[0018] see figure 1 and figure 2 . First use the extrusion die to extrude the deep cylindrical workpiece. When extruding, the extrusion punch 2 is driven by the slider on the press, and the die 3 and the bottom punch 4 act together on the extrusion 1. The punch 2 extrudes a tapered circular groove 6 at the bottom of the cavity of the deep cylindrical part, the diameter of the groov...

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PUM

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Abstract

The invention belongs to the punch processing area, which especially relates to a method and specific terrace die for eliminating the burr of through hole at the bottom of cylinder work-piece. The inventive method comprises: using the specific terrace die to extrude a round groove with certain taper at the bottom of cylinder work-piece, while the open of said groove and the bottom of said cylinder chamber are arc transition; and processing a through hole which is through with said round groove at the bottom of said cylinder work-piece, while the diameter of the open of said round groove is larger 5-25% of the diameter of the hole processed by cutting process. The invention utilizes terrace die to eliminate the burr of through hole at the bottom of cylinder work-piece, which can reduce the process of removing burr with high producing efficiency and lower cost.

Description

technical field [0001] The invention belongs to the field of stamping processing, and in particular relates to a method for eliminating burrs in a through hole at the bottom of a deep cylindrical workpiece and a special punch. Background technique [0002] Usually extruded workpieces still need to be machined to complete the final shape and size of the product after being extruded into a blank. After machining, burrs often appear in the cutting part, which cannot meet the requirements of the production process. Therefore, it is necessary to The deburring is removed, and thus the deburring process is specially added. The usual deburring methods include manual deburring or machine rounding, chamfering or vibration. Among them, the burrs generated during the processing of flat workpieces are removed by manual deburring; the burrs of shallow holes in the workpiece are removed by machine rounding and chamfering; the external burrs in the workpiece are removed by mechanical vibra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C23/02B21C26/00
Inventor 谷成渝
Owner CHANGAN AUTOMOBILE (GRP) CO LTD
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