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Method for determining pressure center of stamping die of random appearance

A technology for determining the center of pressure and determining the method, which is applied in the field of machining and punching, and can solve problems such as scratches on machine tool guide rails, severe damage to dies and machine tools, wear and tear on dies and slider guide rails, etc.

Inactive Publication Date: 2010-07-07
昆明电机厂有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pressure center of the punching die is the action point of the resultant force of the punching force, which is an important data for designing the die. If the pressure center is not on the axis of the die handle, the punch slider will bear eccentric load, resulting in abnormal wear of the punch die and slider guide rail. Especially when the total impact force is close to the tonnage of the punch press, the damage to the die and machine tool is particularly serious, resulting in the rupture of the die edge and scratches on the guide rail of the machine tool, and even safety accidents
[0003] The existing technology can only better determine the punching center of the basically regular straight line, square, circular, triangular and other profile curve dies, or the line shape combined by these basically regular graphics, or the distribution of these graphics on the same plane Find the punching center in the case of forming multi-shaped holes (multi-edged holes), but there is no better way to find the punching center for irregular arbitrary peripheral curve dies

Method used

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  • Method for determining pressure center of stamping die of random appearance
  • Method for determining pressure center of stamping die of random appearance
  • Method for determining pressure center of stamping die of random appearance

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Embodiment Construction

[0020] The pressure center of the die is the action point of the resultant force of the punching force. Such as figure 1 As shown, the blanking closed curve on a datum plane, the blanking force is the force vertically downward along the contour line, which can be regarded as the linear density force dp uniformly distributed on the entire contour line, its force status It is similar to the case of gravity on a homogeneous line segment (such as a thin metal wire) in engineering mechanics, so the formula for solving the center of gravity of a homogeneous line segment can be used to solve the punching force center of the line segment, and take the section a and b as an example to calculate the center of pressure (center of gravity ), let the center point of pressure be Q(x C 、y C ), then the basic formula for solving the center of pressure is:

[0021] x c = ∫ L xd ...

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Abstract

The invention discloses a method for determining a pressure center of a stamping die of random appearance, which comprises the following steps: setting a peripheral closed curve of the stamping die in a plane rectangular coordinate system, dividing the whole closed curve into a group of basic curve sections, solving a pressure center coordinate point of each curve section by using a formula, and solving a pressure center coordinate point of the stamping die according to the pressure center points of all the curve sections by using the formula. The method of the invention can conveniently and accurately determine the pressure center of any curved part stamping die.

Description

technical field [0001] The invention belongs to the technical field of machining punching. Background technique [0002] Punching is an important process in mechanical processing. When designing a die, it is necessary to accurately find the center of the punching pressure. The pressure center of the punching die is the action point of the resultant force of the punching force, which is an important data for designing the die. If the pressure center is not on the axis of the die handle, the punch slider will bear eccentric load, resulting in abnormal wear of the punch die and slider guide rail. Especially when the total impact is close to the tonnage of the punch press, the damage to the die and the machine tool is particularly serious, resulting in the rupture of the die edge and scratches on the guide rail of the machine tool, and even safety accidents. [0003] The existing technology can only better determine the punching center of the basically regular straight line, sq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D28/14
Inventor 宋子明周敏
Owner 昆明电机厂有限责任公司
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