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A multi-parameter majorized cooling cutting technique

A technology of multi-parameter optimization and process method, applied in the direction of manufacturing tools, metal processing equipment, metal processing machinery parts, etc., can solve the problems of small air medium heat transfer coefficient, environmental pollution, unfavorable precision machining, etc., and achieve the reduction of surface roughness , Reduce production costs, improve the effect of tool life

Inactive Publication Date: 2008-04-09
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this process method are: 1. Due to the different degrees of difficulty in processing the materials to be cut, in order to meet the cooling needs during cutting, the operator only adjusts the valve switch based on experience to control the flow rate of the coolant, thereby controlling the flow rate of the cutting fluid. 2. Repeated entrainment of chip powder in cutting fluid is not conducive to precision machining; 3. Causes certain pollution to the environment and high production costs
The defects of this process method are: 1. The operator also controls the amount of air by adjusting the size of the switch based on experience to meet the cooling needs during cutting; 2. Due to the small heat transfer coefficient of the air medium, the cooling effect is also affected to a certain extent.
The currently known theoretical research is: 1. Process parameters such as different media, pressure, target distance, and incident angle are the key factors affecting cutting cooling. 2. If the cooling effect of cutting fluid scouring the cutting area of ​​the processed part can reach the degree of vaporization cooling The cooling effect will change greatly. The large amount of traditional cutting fluid pouring cooling is easy to form a film on the surface of the part, which hinders the volatilization, vaporization and transfer of cutting heat. However, there is very little liquid that can really enter the cutting area, so the cooling effect is very limited.

Method used

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  • A multi-parameter majorized cooling cutting technique

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Cutting material of the present invention is 45 steels, quenching and tempering reaches 26HRC, and diameter D=75mm, and its processing step is as follows in sequence:

[0030] a. Clamp the workpiece, select the three cutting elements, select the machine clamp YT15 blade, adjust the parameters related to cooling to the above optimization area, and align the nozzle with the rake face (or the flank face or the front and flank face at the same time) );

[0031] b. Start the machine tool, open the nozzle, adjust the temperature regulator 4 so that the temperature of the ejected gas is at -10°C, the gas pressure is at 0.15Mpa, and the metering of different liquid media (mainly used here as coolant) is adjusted to 0.020ml / s, cutting The target distance from the area to the nozzle is controlled at about 30mm;

[0032] c. When the tool enters the cutting, observe the temperature of the cutting area through the chip color, or record the cutting temperature with an instrument. Wh...

Embodiment 2

[0039] The cut material of the present invention is GCr12 steel, quenching reaches 58HRC, and diameter D=76mm, and the intensity height of material, hardness are high belong to difficult-to-machine material, and its technological step is as follows in sequence:

[0040] a. Clamp the workpiece, select the three cutting elements, select the machine clamp WAP30 blade, adjust the parameters related to cooling to the above optimization area, and align the nozzle with the rake face (or the flank face or the front and flank face at the same time) );

[0041] b. Start the machine tool, open the nozzle, adjust the temperature of the ejected gas at -25°C, the gas pressure at 0.30Mpa, adjust the metering of different liquid media (mainly coolant + trace vegetable oil) to 1.000ml / s, and the cutting area to The target distance of the nozzle is controlled at about 25mm;

[0042] Process steps c, d, e, f, g are similar to cutting 45 steel, the main differences are:

[0043] c. When the too...

Embodiment 3

[0047] The cut material of the present invention is Cr12 steel, quenching reaches 52HRC, diameter D=82mm, the intensity height of material, toughness is big, and chip has stickiness during cutting, is difficult for breaking chip, and its technological step is as follows in order:

[0048] a. Clamp the workpiece, select the three elements of cutting, select the machine clamp YW1 blade, adjust the parameters related to cooling to the above optimization area, and align the nozzle to the rake face (or the flank face or the front and flank face at the same time) );

[0049] b. Start the machine tool, open the nozzle, adjust the temperature of the ejected gas at -30°C, the gas pressure at 0.30Mpa, adjust the metering of different liquid media (mainly coolant + trace vegetable oil) to 0.800ml / s, and the cutting area to The target distance of the nozzle is controlled at about 25mm;

[0050] Process steps c, d, e, f, g are similar to cutting 45 steel, the main differences are:

[005...

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PUM

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Abstract

The invention discloses an optimized cooling cutting process method with multiple parameters, and the optimized cooling cutting process method comprises a liquid cooling device installed on a machine tool, a cooling pump of the device is turned on during the cutting, the cooling liquid is flowed through an adjusting valve, a liquid flow meter, and a spray nozzle, and then sprayed out of a cooling work piece, a set of air cooling device is also arranged on the machine tool, air is compressed by an air compressor, and then respectively flowed through a safety valve, an isolating valve, a temperature regulator, an adjusting valve, a gas flow meter, a gas pressure meter, a thermometer, and a spray nozzle, and then sprayed out of the cooling work piece; the temperature of gas is minus 5 to minus 35 DEG C; the range of the gas pressure is 0.10 to 0.35 MPa; the metering of different liquid mediums is 0.015 to 1.25 ml / S, a target distance adjusting range is 15 to 35 mm, and the incidence angle adjusting range is 15 degrees to 45 degrees, the invention can efficiently improve the servicing life of cutter at least three times, the cutting force and cutting heat can be decreased 6 percent to 25 percent, the surface roughness can be decreased 1 to 2 levels, the size error value is only 5.5 percent of simple natural air cooling cutting, the production cost is low, and no environmental contamination is produced.

Description

technical field [0001] The invention relates to a cooling cutting process, which belongs to the technical field of metal cutting process in mechanical manufacturing. Background technique [0002] When cutting metal materials, a large amount of cutting heat will be generated, which will increase the cutting temperature in the cutting area, increase the cutting force, intensify the tool wear, make the whole cutting process difficult, and finally affect the surface quality, dimensional accuracy and Productivity of parts processing, etc. Therefore, in the cutting process, it is often necessary to increase the coolant to cool the cutting and improve the cutting environment to improve the surface quality of the parts. [0003] The current cutting cooling process is mainly to use cutting fluid to cool cutting. A cooling pump, a cooling liquid box, a cooling liquid nozzle and its hose are installed on a general machine tool; when metal cutting needs to be cooled, the cooling pump i...

Claims

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Application Information

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IPC IPC(8): B23Q11/10
Inventor 任家隆周云祥周根明
Owner JIANGSU UNIV OF SCI & TECH