Magnetorheological intelligent fixture for grinding

Patent metadata

Field	Value
Publication number	US-11926015-B2
Application number	US-202117438422-A
Country	US
Kind code	B2
Filing date	Mar 17, 2021
Priority date	Mar 18, 2020
Publication date	Mar 12, 2024
Grant date	Mar 12, 2024

Abstract

Disclosed is a magnetorheological intelligent fixture for grinding, including a container (1), a water bladder (2), a pressure transmitter (4), a water pump (15), a first electromagnet (8), a controller (10), and an elastic telescopic rod. The elastic telescopic rod is disposed at a bottom of the container (1). Each side wall of the container (1) is provided with the water bladder (2). The water bladders (2) are mutually communicated. The water bladders (2) are respectively communicated with the pressure transmitter (14) and the water pump (15) respectively. The water pump (15) is connected to the water tank (6). A workpiece to be clamped is disposed at a top of the elastic telescopic rod. The container (1) is disposed above the first electromagnet (18). The first electromagnet (8), the pressure transmitter (4), and the water pump (15) are all electrically connected to the controller (10).

First claim

What is claimed is:

1. A magnetorheological intelligent fixture for grinding, comprising: a container, a water bladder, a pressure transmitter, a water pump, a first electromagnet, a controller, and an elastic telescopic rod, wherein
the container contains a first magnetorheological fluid; the elastic telescopic rod is disposed at a bottom of the container, each side wall of the container is provided with the water bladder, the water bladders are mutually communicated, the water bladders are respectively connected to the pressure transmitter and the water pump, and the water pump is connected to the water tank; a workpiece to be clamped is disposed on a top of the elastic telescopic rod; the container is disposed above the first electromagnet; the first electromagnet, the pressure transmitter, and the water pump are all electrically connected to the controller; and the elastic telescopic rod is configured to position and support the workpiece to be clamped, the controller is configured to control the water pump to pressurize the water bladder to pre-clamp the workpiece to be clamped, the pressure transmitter is configured to measure a clamping force of the water bladder on the workpiece to be clamped and transmit the clamping force to the controller, and the controller is also configured to control the first electromagnet to be energized according to the clamping force to solidify the first magnetorheological fluid to clamp the workpiece to be clamped.

2. The magnetorheological intelligent fixture for grinding according to claim 1 , wherein the elastic telescopic rod comprises: a telescopic rod housing, a second electromagnet, a sliding rod, and a displacement sensor; the sliding rod is disposed at a bottom end of the container; the workpiece to be clamped is disposed at a top end of the telescopic rod housing; the telescopic rod housing is disposed at a top end of the sliding rod, the telescopic rod housing and the sliding rod form a closed space, a second magnetorheological fluid is provided in the closed space, the sliding rod can slide up and down through the telescopic rod housing, and the workpiece to be clamped will slide along with the telescopic rod housing; and the second electromagnet and the displacement sensor are both disposed on the telescopic rod housing, the second electromagnet and the displacement sensor are both electrically connected to the controller, the displacement sensor is configured to acquire a displacement of the telescopic rod housing in real time and transmit the displacement to the controller, and the controller is configured to control the second electromagnet to be energized according to the displacement to solidify the second magnetorheological fluid to make the workpiece to be clamped stay at a set position.

3. The magnetorheological intelligent fixture for grinding according to claim 2 , wherein the elastic telescopic rod further comprises a spring, one end of the spring is connected to the top end of the sliding rod, and the other end of the spring is connected to an inner wall of the telescopic rod housing.

4. The magnetorheological intelligent fixture for grinding according to claim 3 , wherein the elastic telescopic rod further comprises a spring support frame, the spring support frame is connected to the top end of the sliding rod, and the spring support frame is configured to support the spring.

5. The magnetorheological intelligent fixture for grinding according to claim 2 , further comprising an acquisition card, wherein the controller, the pressure transmitter, and the displacement sensor are all electrically connected to the acquisition card; and the acquisition card is configured to acquire the clamping force measured by the pressure transmitter and the displacement measured by the displacement sensor, and transmit the clamping force and the displacement to the controller.

6. The magnetorheological intelligent fixture for grinding according to claim 1 , further comprising a water pipe, wherein the water bladder is communicated with the water pump and the pressure transmitter respectively through the water pipe.

7. The magnetorheological intelligent fixture for grinding according to claim 6 , further comprising a valve, wherein the valve is disposed on the water pipe, and the water pump is communicated with the water pipe through the valve.

8. The magnetorheological intelligent fixture for grinding according to claim 1 , wherein the elastic telescopic rod comprises at least one elastic supporting telescopic rod and an elastic positioning telescopic rod, the elastic positioning telescopic rod is configured to support a workpiece positioning point of the workpiece to be clamped, so as to position the workpiece to be clamped, and the at least one elastic supporting telescopic rod is configured to support a part of the workpiece to be clamped except at the workpiece positioning point.

9. The magnetorheological intelligent fixture for grinding according to claim 8 , wherein the quantity of the elastic positioning telescopic rod is 1.

10. The magnetorheological intelligent fixture for grinding according to claim 8 , wherein the quantity of the at least one elastic supporting telescopic rod is 16.

Assignees

• Univ Zhejiang Normal

Inventors

• He Xinsheng
• Zheng Lanpeng
• Jiang Jiajie
• Zhou Chongqiu
• Gao Chunfu
• Wang Dongyun
• E Shiju

Classifications

• B24B37/27 Primary

  Work carriers · CPC title

• B24B49/16 Primary

  taking regard of the load · CPC title

• B23Q1/38

  using fluid bearings or fluid cushion supports · CPC title