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Ultrasonic surface rolling finishing feedback system capable of automatically regulating and controlling static pressure

A feedback system and static pressure technology, applied in the field of metal surface treatment, can solve problems such as the inability to ensure constant static pressure, unsatisfactory surface strengthening effects, uneven force on the processed surface, etc., to achieve high precision, stable operation, and improved reliability. controlling effect

Inactive Publication Date: 2016-06-22
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a feedback system for ultrasonic surface rolling processing that can automatically adjust the static pressure, which can accurately measure and control the static pressure during ultrasonic surface rolling processing, and solve the problem that the rolling cannot be guaranteed when processing eccentric shaft workpieces The constant static pressure in the processing process causes uneven force on the processed surface and unsatisfactory surface strengthening effect. The present invention introduces a new rolling processing feedback system based on the ultrasonic surface rolling device, so as to realize the Accurate measurement and automatic control of static pressure

Method used

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  • Ultrasonic surface rolling finishing feedback system capable of automatically regulating and controlling static pressure
  • Ultrasonic surface rolling finishing feedback system capable of automatically regulating and controlling static pressure
  • Ultrasonic surface rolling finishing feedback system capable of automatically regulating and controlling static pressure

Examples

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Embodiment 1

[0040] Use current technology to treat the surface of magnesium alloy shaft workpieces. In this example, the rolling processing is the shaft parts with machining eccentricity error (the shaft parts will have a slight eccentricity error when machined by machine tools, or there are some eccentric shaft parts in the actual application that need to be rolled nano-processing. ). The rolling process uses a spherical working head to roll on the surface of the workpiece.

[0041] In this example, the main technical parameters are: the spindle speed of the machine tool is 250r / min, the feed rate of the impact work head is 10mm / min, the static pressure is 100N, the machining is reciprocated 5 times, the emulsion coolant is used as the lubricating fluid, and the work head is selected Bearing steel, the diameter is 15mm, and the output ultrasonic amplitude of the working head is 10μm.

[0042] Processing results of this example: due to the existence of eccentricity, the force on both sides o...

Embodiment 2

[0044] The ultrasonic surface rolling device of the feedback system of the present invention processes the surface of the eccentric magnesium alloy shaft workpiece described in Example 1. First, the static pressure is zeroed, and then the static pressure (preset value) required for processing is set , This processing still uses a spherical working head to roll on the surface of the workpiece.

[0045] The main parameters of this example are the same as those of example one

[0046] Processing result of this example: The surface of magnesium alloy eccentric shaft workpiece processed by the ultrasonic surface rolling device containing the feedback system of the present invention is very smooth, and the roughness R measured by the high-precision inductive surface roughness tester a It is about 0.2μm.

[0047] By comparing the surface roughness values ​​of implementation case 1 and implementation case 2, it can be found that the ultrasonic surface rolling device using the feedback system...

Embodiment 3

[0049] Circumferential hardness measurement is performed on magnesium alloy eccentric shaft parts processed by the ultrasonic surface rolling device without the feedback system of the present invention.

[0050] In this example, a Brinell hardness tester is used to measure the surface microhardness of the magnesium alloy shaft workpiece processed by the ultrasonic surface rolling device that does not include the feedback system of the present invention. Measure once every 30° in the circumferential direction, and finally obtain the circumferential microhardness distribution curve of the magnesium alloy with this treatment method.

[0051] The hardness distribution curve obtained in this example is as follows Figure 5 As shown, it can be seen intuitively that the hardness distribution from 0°-180° is extremely uneven, and the hardness value is relatively low overall, and the nano-strengthened layer is not completely realized on the surface of the material. This fully shows that due...

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Abstract

The invention relates to an ultrasonic surface rolling finishing feedback system capable of automatically regulating and controlling static pressure, and belongs to the field of metal surface treatment. The ultrasonic surface rolling finishing feedback system comprises an ultrasonic transducer, an ultrasonic amplitude transformer, a rolling head, an electric push rod, a pressure sensor and the like, wherein the pressure sensor is fixed to the rear end of an inner sleeve through fastening bolts; a shaft head with a thread is fixed to the pressure sensor; the electric push rod is fastened to a rear cover of an outer sleeve; an ultrasonic vibration system can perform axial motion by extension and retraction of the push rod to generate static pressure. When a load is changed, a signal from the pressure sensor is sent to a PLC (programmable logic controller), the PLC compares real-time pressure value with preset value, and then extension and retraction control over the electric push rod is performed, accordingly, constant static pressure in a machining process is maintained. The ultrasonic surface rolling finishing feedback system has the advantages that the operation is simple, the precision is high, the running is stable, and synchronous automatic control can be achieved.

Description

Technical field [0001] The invention relates to the field of metal surface treatment, in particular to an ultrasonic surface rolling processing feedback system capable of automatically regulating static pressure. Background technique [0002] Mechanical components are widely used in important fields such as ships, vehicles, bridges, pressure vessels, marine engineering, aerospace, metallurgy, and electric power. However, these important mechanical components and structures are subject to fatigue, creep, corrosion, brittle fracture, Problems such as wear cause failure, among which fatigue damage, corrosion and wear are more common. For example, due to the speed increase, the fatigue problem of mechanical parts has become an important damage mechanism that affects the safety of railway driving and the service life of rails. For example, the contact fatigue damage of cold rolls in steel rolling equipment has not been properly solved so far. Dynamic contact friction exists widely in...

Claims

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Application Information

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IPC IPC(8): B23P9/02
CPCB23P9/02
Inventor 赵小辉赵博刘宇彭志刚张艳君薛桂连
Owner JILIN UNIV
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