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Method for finite element analysis of hot rolling spiral steel spring forming process

A spiral steel and finite element technology, applied in the field of finite element analysis of the hot-rolled spiral steel spring forming process, can solve the problems of scrapping of physical prototypes, high cost of trial production of new products, waste of energy, etc., to save heat, improve trial production efficiency, The effect of reducing manufacturing costs

Inactive Publication Date: 2014-08-27
TIANJIN JL RAILWAY TRANSPORT EQUIP
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  • Application Information

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Problems solved by technology

During the rolling process, the bar needs to be heated to 940°C, heating and cooling the heating furnace will cause a great waste of energy, and unqualified physical prototypes can only be scrapped
Therefore, the cost of trial production of new products is extremely high

Method used

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  • Method for finite element analysis of hot rolling spiral steel spring forming process
  • Method for finite element analysis of hot rolling spiral steel spring forming process
  • Method for finite element analysis of hot rolling spiral steel spring forming process

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Embodiment Construction

[0029] The object of the present invention is achieved by the following measures:

[0030] 1. Simplify the spring forming equipment, establish the models of the mandrel, bite block, guide wheel, tightening wheel, and tip wheel, determine their relative positions, and establish the finite element model of the bar. (see figure 1 )

[0031] 2. Define the contact body and contact relationship

[0032] Define the mandrel, bite block, guide wheel, tightening wheel, and tapered wheel as a rigid body, and the bar as a flexible body. During the spring forming process, the contact relationship between the rigid body and the flexible body is as follows: the mandrel (xinzhou) , the bite block (yao), the guide wheel (daoxianglun), the tightening wheel (jiajinlun), and the tip wheel (shoujianlun) are defined as rigid bodies, and the bar is defined as a flexible body. The bar is divided into 5 parts, which are head ), the tail (end), and the middle of the spring are divided into three par...

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Abstract

A method for finite element analysis of a hot rolling spiral steel spring forming process comprises a first step of simplifying a spring forming device, establishing a mandrel, a snapping block, a guide wheel, a tightening wheel and a tapped wheel model, determining the relative positions of the mandrel, the snapping block, the guide wheel, the tightening wheel and the tapped wheel model, and establishing a bar material finite element model; a second step of defining contact bodies and contact relations; a third step of defining the relations of mandrel rotation motion and axial motion, defining the rotation motion and axial motion as a function of time T, setting time parameters as Ti, enabling the thread pitch of a Ti time period to be Pi, enabling the rotation angle of the mandrel to be theta, enabling the rotation speed to be omega, enabling a motion equation of the mandrel rotation motion and axial motion to be as follows; a fourth step of establishing calculation, checking results, establishing a CAE model and submitting the calculation, and rolling a formed model. According to the method, the physical prototype manufacturing process is replaced with the virtual manufacturing process, the method is used for guiding a rolling forming process of a hot rolling spiral steel spring, trial-manufacture efficiency of a novel product is improved, and the trial-manufacture cost of the novel product is reduced. The method is suitable for simulating spiral cylindrical steel springs of random diameters.

Description

technical field [0001] The invention belongs to the virtual manufacturing technology of steel springs. The invention relates to a design method for the forming process of a spiral steel spring, in particular to a finite element analysis method for the forming process of a hot-rolled spiral steel spring. This method provides a simulation analysis method for the forming (coil spring) process of the hot-rolled spiral steel spring, and replaces the manufacturing process of the physical prototype with a virtual manufacturing process. High trial-production efficiency and reduce the trial-production cost of new products. This method is suitable for simulating helical cylindrical steel springs of any diameter. technical background [0002] In the production process of hot coil springs, the forming (coil spring) process of hot coil springs is one of the important processes in the production process. The forming of the hot coil spring is to use the characteristics of low strength a...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 王玉梅王军问增杰邓奎天王籼赵国亮丁元松杜国柱郝艳丽
Owner TIANJIN JL RAILWAY TRANSPORT EQUIP
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