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A thin-wall steering knuckle variable pressure fixture and its application method

A steering knuckle and pressure technology, used in clamping, manufacturing tools, metal processing machinery parts, etc., can solve problems such as deformation, workpiece deformation, poor cylindricity of king pin holes, etc., to reduce deflection, eliminate deformation, and ensure no deformation. Effect

Active Publication Date: 2021-08-03
HUBEI TRI RING FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the thin wall of the king pin hole of the steering knuckle, the pressing force of the existing clamping device is a fixed value. The large pressing force will cause the workpiece to deform during finishing machining. The size of the workpiece is qualified on the machine tool, but after the workpiece is removed, the workpiece will be deformed. Return to the original state, resulting in deformation, resulting in poor cylindricity of the kingpin hole of the product

Method used

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  • A thin-wall steering knuckle variable pressure fixture and its application method
  • A thin-wall steering knuckle variable pressure fixture and its application method
  • A thin-wall steering knuckle variable pressure fixture and its application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1, a kind of thin-wall steering knuckle variable pressure clamp, such as figure 1 , 4As shown, it includes a CNC machine tool, a clamping assembly and a hydraulic station. The clamping assembly includes a base 1, three lever cylinder clamps 2 arranged on the base 1, and superimposed electronically controlled clamps that control the lever cylinder clamps 2 respectively. Pressure valve 4, the relay that controls the superimposed electronically controlled pressure reducing valve 4, the relay is connected with the control system of the CNC machine tool, the superimposed electronically controlled pressure reducing valve 4 is Taiwan Combest KOMPASS superimposed electronically controlled pressure reducing valve 4, and the model is MSPR -02P-1-K-1-D24, superimposed electric control pressure reducing valve 4 as shown in the figure, including solenoid valve 3, pressure reducing valve 4 and overflow valve 5, the switch signal of solenoid valve 3 is connected to the rela...

Embodiment 2

[0046] In Example 2, K1 is selected as 1.7, K2 is selected as 1.4, and other settings are the same as in Example 1. The calculated working pressure P1 for rough machining is 55.91 MPa, and the working pressure for finishing machining is P2 = 5.09 MPa. During the rough machining of the steering knuckle, the control system of the CNC machine tool controls the solenoid valve to close through the relay, the overflow valve does not work, and the pressure at the hydraulic cylinder is controlled to 55.9MPa by the pressure reducing valve; when the steering knuckle is finished, the CNC machine tool The control system controls the solenoid valve to open through the relay, the relief valve works, and the pressure at the hydraulic cylinder is controlled to 5.1MPa by the relief valve.

[0047] The cylindricity of the kingpin hole of the processed steering knuckle was tested, and the cylindricity was measured to be 0.015mm.

Embodiment 3

[0048] In Example 3, K1 is selected as 1.2, K2 is selected as 0.9, and the other settings are the same as in Example 1. The calculated working pressure P1 for rough machining is 39.47 MPa, and the working pressure for finishing machining is P2 = 3.27 MPa. During the rough machining of the steering knuckle, the control system of the CNC machine tool controls the solenoid valve to close through the relay, the overflow valve does not work, and the pressure at the hydraulic cylinder is controlled to 39.5MPa by the pressure reducing valve; when performing the finishing machining of the steering knuckle, the CNC machine tool The control system controls the solenoid valve to open through the relay, the relief valve works, and the pressure at the hydraulic cylinder is controlled to 3.3MPa by the relief valve.

[0049] The cylindricity of the kingpin hole of the processed steering knuckle was tested, and the measured cylindricity was 0.061mm.

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PUM

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Abstract

The invention relates to the field of mechanical processing, and discloses a clamp with variable pressure for a thin-walled steering knuckle, including a numerically controlled machine tool, a clamping assembly, and a hydraulic station. The clamping assembly includes a base and a plurality of lever cylinder clamping pliers arranged on the base and the superimposed electric control decompression valve respectively controlling the clamping pliers of the lever cylinder, and the superposition electric control decompression valve is connected with the control system of the numerical control machine tool. The present invention has the following advantages and effects: select the appropriate pressing force according to the main cutting force of roughing and finishing, and reduce the deformation of the steering knuckle while ensuring the stability of the clamping; Multiple positioning rods are used to position the steering knuckle in the circumferential direction, which reduces the deflection of the steering knuckle during processing and improves the stability of the clamping; the clamping rod is slid in the pressing rod to adjust the gear and the rack The meshing realizes the simultaneous clamping and loosening of the steering knuckle horizontally and vertically, which improves the stability and clamping efficiency of the steering knuckle clamping.

Description

technical field [0001] The invention relates to the technical field of mechanical manufacturing, in particular to a clamp for variable pressure of a thin-wall steering knuckle. Background technique [0002] In the existing method of machining the kingpin hole of the steering arm, since the rough and finish machining is completed in one clamping in the machining process of the kingpin hole of the steering knuckle, the machining allowance in the rough machining stage is large. The amount is large, the chip force is large, and a large pressing force is required. Due to the thin wall of the king pin hole of the steering knuckle, the pressing force of the existing clamping device is a fixed value. The large pressing force will cause the workpiece to deform during finishing machining. The size of the workpiece is qualified on the machine tool, but after the workpiece is removed, the workpiece will be deformed. Return to the original state, resulting in deformation, resulting in p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23Q3/08
CPCB23Q3/082
Inventor 张运军徐生荣王战兵刘海军刘俊生张涛甘龙秦健黄锐杨超杨帆
Owner HUBEI TRI RING FORGING