Intelligent grinding device for short pulse electrical melt chip removal cooling

Patent metadata

Field	Value
Publication number	US-9687952-B2
Application number	US-201515300772-A
Country	US
Kind code	B2
Filing date	Dec 31, 2015
Priority date	Mar 19, 2015
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

An intelligent grinding device for short pulse electrical melt chip removal cooling, includes a diamond grinding wheel, a pulse power supply, a force meter sensor, thermocouple in a hole of work piece for measuring machining temperature, a voltage sensor, a current sensor, a temperature collecting card, a charge amplifier, a force meter, a digital oscilloscope and a discharge parameter feedback adjustment system. The pulse power supply has a positive pole connecting with the grinding wheel, and a negative pole connecting with the work piece. The voltage sensor and the current sensor respectively put collected discharge voltage and current wave of the discharge circuit to be stored in a display terminal through the digital oscilloscope. The thermocouple connects with the display terminal by the temperature collecting card.

First claim

What is claimed is:

1. An intelligent grinding device for short pulse electrical melt chip removal cooling, including a diamond grinding wheel ( 1 ) fixed on a grinding wheel shaft of a CNC grinding machine, a pulse power supply ( 10 ), a force meter sensor ( 4 ) fixed on a horizontal work table ( 5 ) of the CNC grinding machine, thermocouple ( 3 ) in a hole of work piece ( 2 ) for measuring machining temperature, a voltage sensor ( 12 ), a current sensor ( 11 ), a temperature collecting card ( 6 ), a charge amplifier ( 7 ), a force meter ( 8 ), a digital oscilloscope ( 13 ) and a discharge parameter feedback adjustment system ( 14 ), the diamond grinding wheel ( 1 ) is a metal-bonded diamond grinding wheel, the pulse power supply ( 10 ) having a positive pole connecting with the grinding wheel ( 1 ), and a negative pole connecting with the work piece ( 2 ), forming a discharge circuit, the voltage sensor ( 12 ) and the current sensor ( 11 ) respectively putting collected discharge voltage and current wave of the discharge circuit to be stored in a display terminal ( 9 ) through the digital oscilloscope ( 13 ), the thermocouple ( 3 ) connecting with the display terminal ( 9 ) by the temperature collecting card ( 6 ), and the force meter sensor ( 4 ) connecting in sequence with the charge amplifier ( 7 ), the force meter ( 8 ) and the display terminal ( 9 ), the discharge parameter feedback adjustment system ( 14 ) is used for self-adaptively adjusting voltage and current value of the pulse power supply ( 10 ) according to pulse discharge parameters including peak current, pulse continuous time, which are transformed by collected voltage and current wave characteristics, performing intelligent discharge grinding.

2. The intelligent grinding device for short pulse electrical melt chip removal cooling according to claim 1 , wherein open-circuit voltage of the pulse voltage ( 10 ) is 20V-25V, duty cycle is 40%-50%, frequency is 4000 Hz-5000 Hz, and discharge gap of the pulse sparkle is 0˜150 μm, pulse width is 10˜100 microsecond, and current is 0˜10 A.

3. The intelligent grinding device for short pulse electrical melt chip removal cooling according to claim 1 , wherein rotation speed of the diamond grinding wheel ( 1 ) is 20˜50 m/s, feed depth is 1˜10 μm, and feed speed is 100˜500 mm/minute.

4. The intelligent grinding device for short pulse electrical melt chip removal cooling according to claim 1 , wherein the material of the work piece ( 2 ) may be die steel, hard alloy, titanium alloy, Al—SiC.

5. The intelligent grinding device for short pulse electrical melt chip removal cooling according to claim 1 , wherein the diamond grinding wheel ( 1 ) may be bronze bond.

Assignees

• Univ South China Tech

Inventors

• Xie Jin
• Lu Yanjun
• Deng Zhenjie
• You Jiahui
• Si Xianhai
• Cheng Jian

Classifications

• B24B49/14

  taking regard of the temperature during grinding · CPC title

• B24B27/06 Primary

  Grinders for cutting-off · CPC title

• B24B49/10

  involving electrical means (B24B49/02, B24B49/08 take precedence) · CPC title

• B24B55/02

  Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant (cooling or lubricating during dressing operation B24B53/095; incorporated in grinding wheels B24D) · CPC title

• B24B55/06

  Dust extraction equipment on grinding or polishing machines (B24B31/12 takes precedence) · CPC title