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Device and method for testing friction coefficient of heatable metal plate

A friction coefficient and metal sheet technology, which is applied in the field of friction coefficient testing devices for heatable metal sheets, can solve the problems of small temperature control range, inability to control the temperature of test pieces and molds, and inability to fully simulate and measure metal hot forming conditions, etc., to achieve improvement The effect of forming quality

Pending Publication Date: 2020-08-04
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent cannot control the temperature of the test piece and the mold separately, and its temperature control range is small (-20°C~65°C), which cannot fully simulate and measure the metal hot forming condition

Method used

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  • Device and method for testing friction coefficient of heatable metal plate
  • Device and method for testing friction coefficient of heatable metal plate
  • Device and method for testing friction coefficient of heatable metal plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] The flat plate friction test is carried out at normal temperature (that is, the cold mold cold plate), the set pressure P=500N and 2500N, the vertical pressure is the actual pressure P during the test, the tensile speed V=5mm / s, the tensile stroke is 100mm, and the horizontal The tension is the tension F collected by the horizontal force sensor 11, and the friction coefficient is calculated according to the formula As shown in Table 1.

[0069] Table 1 Friction coefficient of flat plate friction test at room temperature

[0070]

Embodiment 2

[0072] The flat plate friction test is carried out under the state of hot plate and hot mold, and the effective heating zone 14 of the test piece is set at the temperature T 0 =100℃, the mold temperature is T m =100°C, T 1 Form the average temperature of the test piece 6 stable heating section collected in the friction test, set the pressure P=400N and 1100N, the vertical pressure is the actual pressure P during the test, the tensile speed V=10mm / s, and the tensile stroke 240mm , the horizontal tensile force is the tensile force F collected by the horizontal force sensor 11, and the friction coefficient is calculated according to the formula shown in Table 2.

[0073] Table 2 Friction coefficient of heating plate friction test

[0074]

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Abstract

The invention discloses a device and method for testing the friction coefficient of a heatable metal plate. The device comprises a mold movement assembly, a mold heating assembly, a test piece heatingand measuring assembly and a test piece movement assembly, wherein the mold movement assembly comprises a vertical linear actuator (1) and a vertical force sensor (3), the mold heating assembly comprises an upper mold assembly (7) and a lower mold assembly (8), the upper mold assembly comprises an upper mold base (20) and an upper mold (19), the lower mold assembly comprises a lower mold base (22) and a lower mold (25), the test piece heating and measuring assembly comprises a heating furnace (5) and an infrared thermometer (9), and a heating rod and the test piece heating and measuring assembly are connected with a PID controller (13). Through independent heating of the test piece and the mold, the friction coefficient between the mold and the part during hot forming of the sheet metal part is measured, the use condition of a metal stamping lubricant in the heating environment is evaluated, and the friction condition of hot forming of the sheet metal part in actual production is accurately simulated and measured.

Description

technical field [0001] The invention relates to a friction test device and method, in particular to a test device and method for friction coefficient of a heatable metal plate. Background technique [0002] Stamping of sheet metal is a widely used and efficient processing method in the manufacturing industry, and its formed parts are widely used in various fields of daily production and life. In the stamping process, the accurate forming of parts depends largely on the reasonable selection and comprehensive effects of process parameters such as the friction coefficient on the stamping interface, the mechanical properties of the sheet, and the blank holder force. Compared with the fluctuation of material properties and process parameters, the fluctuation of friction coefficient has a much greater impact on the sheet metal forming process. [0003] The influence of friction on metal forming is not only manifested in the size of forming force and energy consumption, but also d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/02
CPCG01N19/02
Inventor 曾渝路旭胡晓杨兵冯伟骏
Owner BAOSHAN IRON & STEEL CO LTD