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Design method for reducing discharging quantity of spider cold forging blank

A design method and three-pin frame technology, applied in design optimization/simulation, calculation, special data processing applications, etc., can solve cumbersome problems, achieve simple preparation process, optimize mechanical properties, and reduce production costs

Active Publication Date: 2016-04-20
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a design method for reducing the blanking amount of the three-pin frame, which solves the cumbersome subsequent machining process of the three-pin frame in the prior art, saves the cost to the greatest extent, and at the same time , without changing the shape and size of the sample, cryogenic treatment is used to obtain better comprehensive mechanical properties of the tripod

Method used

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  • Design method for reducing discharging quantity of spider cold forging blank
  • Design method for reducing discharging quantity of spider cold forging blank
  • Design method for reducing discharging quantity of spider cold forging blank

Examples

Experimental program
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Effect test

Embodiment 1

[0025] In this example, a process method for reducing the cutting amount of the three-pin frame cold forging forming blank comprises the following steps:

[0026] Step 1: According to the parts diagram, calculate the difference ΔH between the theoretical cutting amount H1 and the actual cutting amount H2;

[0027] Step 2: Use the 3D modeling software SOLIDWORKS to establish a 3D model of the part;

[0028] Step 3: Use DEFORM-3D finite element simulation software to perform finite element simulation on the three-pin frame forming process, so that H2 gradually decreases ΔH 1 , ΔH 2 , ΔH 3 ... until close to H1;

[0029] Step 4: Perform equivalent stress, equivalent strain, and load-displacement curve analysis on the finite element model with the final blank size H1, and change the mold process parameters to make the formed parts meet the production requirements;

[0030] Produce and process the simulated and optimized parts, and verify that the optimized size not only meets ...

Embodiment 2

[0032] The simulated and optimized parts are produced and processed, and the processed parts are subjected to cryogenic treatment, immersed in liquid nitrogen for 40 minutes, and then tested for their microhardness, yield strength, tensile strength, and elongation.

[0033] Comparing the microhardness, yield strength, tensile strength and elongation of the tripod parts obtained in Example 2 and Example 1, it is found that the mechanical properties of the 20Cr tripod parts after cryogenic treatment have been significantly improved.

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Abstract

The invention discloses a design method for reducing the discharging quantity of spider cold forging blank. The method mainly comprises a step (1) of calculating difference value delta H between the theoretic discharging quantity H1 and the actual discharge rate H2 according to a detail drawing; a step (2) of building a three-dimensional solid model by utilizing SOLIDWORKS; a step (3) of performing finite element modeling on the spider forming process through DEFORM-3D finite element modeling software to enable the delta H to reduce gradually until the H2 closes to the H1; and a step (4) of performing equivalent stress, effective strain and load displacement curve analysis on an optimized finite element model with the blank quantity of HX and changing technological parameters of a die corner R and the draft angle V to enable molded parts to meet the production requirements. According to the design method, the flow of metal and reasonable forming technology parameters in the spider cold forging modeling can be analyzed accurately, the discharging quantity of the blank is reduced, the microhardness and the strength of the parts after undergoing subzero treatment are improved remarkably, and the parts have good plasticity.

Description

technical field [0001] The invention belongs to the technical improvement field of a tripod frame, in particular to the optimization of the cutting amount of a blank for cold forging of a tripod frame, and a process method for improving performance of a 20Cr tripod frame after cryogenic treatment after forming. Background technique [0002] The constant velocity universal joint is one of the key components of the car transmission system, and is listed as a key component project supported by the state. The transmission system of a car has strict requirements on the transmission accuracy, driving torque, and load-carrying capacity of the universal joint. Die forging processing. The three-ball constant velocity universal joint is a new type of axial movement mechanism. The three-pin frame is an important part of the three-ball constant velocity universal joint. high expectation. [0003] In the cold forging of the three-pin frame, the forming process is difficult to control,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 魏伟牛玲魏坤霞杜庆柏胡静
Owner CHANGZHOU UNIV
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