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Bar stock pneumatic radial impact blanking method with high-efficiency and precision

A technology of precision blanking and bar material, which is applied in the field of low energy consumption, near-net and high-efficiency precision forming, and can solve the problems of large blanking force, low material utilization rate, and poor blanking section quality.

Inactive Publication Date: 2010-07-28
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The blanking of metal bars widely exists in the preparation process of cold extrusion, die forging, metal chain pins, rolling bearing rollers, pin standard parts and shaft parts, and in these blanking processes, the amount of blanking is huge, At present, traditional shearing, sawing, high-energy cutting and other blanking methods have problems such as low material utilization rate, large blanking force, high energy consumption, low production efficiency and poor blanking section quality to varying degrees.

Method used

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  • Bar stock pneumatic radial impact blanking method with high-efficiency and precision
  • Bar stock pneumatic radial impact blanking method with high-efficiency and precision

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Embodiment Construction

[0012] The high-efficiency and precise blanking method of bar material pneumatic radial impact of the present invention utilizes the fatigue fracture mechanism of the bar material to drive the blanking die along the radial direction of the bar material for cyclic loading. The working contour curve of the blanking die adopts a cycloid, which is driven by the cylinder piston to perform radial impact motion. The bar is fixed and stationary, and the evenly arranged 7 impact cylinders and the 7 blanking dies driven by them are used to move in sequence, so that the load is continuously applied along the radial direction of the bar, which promotes the generation and expansion of the fatigue crack of the bar. Complete precision cutting. In order to realize the blanking of bars of different diameters, a replaceable blanking die is adopted.

[0013] The feeding device of the present invention is as follows figure 1 As shown, the pneumatic radial impact precision blanking device includ...

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Abstract

The invention discloses a bar stock pneumatic radial impact high-efficiency precise blanking method. In the method, the bar stock is arranged on a pneumatic radial impact precise blanking device and the main working parts of the blanking device comprise a blanking sleeve, an elastic pad sleeve, a bar stock fixing sleeve, an impact cylinder, a piston and a blanking die. The impact cylinder works sequentially under the control of a control system and drives the blanking die to load the bar stock along the radial direction continuously; cracks are extended from the surface of the bar stock alongthe radial direction to the center of the circle by a fatigue breaking device of the bar stock, thus achieving the blanking and gaining good quality of the profile.

Description

technical field [0001] The invention belongs to the technical field of low-energy consumption, near-net and high-efficiency precision molding, and relates to a blanking method, in particular to a high-efficiency and precise blanking method of bar material pneumatic radial impact, which utilizes a pneumatic radial impact high-efficiency and precise blanking device, Using the principle of aerodynamic impact, the fatigue cracks of the bar under cyclic radial loading can be generated circumferentially, propagated until fractured, and finally finished blanking. Background technique [0002] The blanking of metal bars widely exists in the preparation process of cold extrusion, die forging, metal chain pins, rolling bearing rollers, standard parts of pins and shaft parts, and in these blanking processes, the number of blanks is huge. At present, the traditional cutting, sawing, high-energy cutting and other cutting methods have problems such as low material ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D28/02B21D28/14B21D28/20B21D28/04B21D28/18
Inventor 赵升吨唐勇王振伟
Owner XI AN JIAOTONG UNIV
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