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Preparing method of PCD cutter long in service life

A tool and life technology, applied in the field of high-life PCD tool preparation, can solve the problems of not being able to meet the performance and life requirements of PCD tools with concave and complex contours, affecting tool life, increasing tool life, etc., to reduce oxidation effect, improve cost performance, and increase service life

Active Publication Date: 2016-01-27
WUXI GUOHONG MEASURING & CUTTING TOOLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The cobalt content of the PCD tool directly affects the service life of the tool, and its uniform distribution among the diamonds can improve the strength, but some irregularly distributed cobalt will increase the residual stress of the PCD tool and reduce the service life
And the service life of PCD tools is also related to the content of metal cobalt, the higher the cobalt content, the more serious its heat impact; the lower the cobalt content, the worse its toughness
[0009] Therefore, the traditional tool preparation process has been unable to meet the performance and service life requirements of PCD tools with concave and complex contours. Reduce the chipping of the edge after processing and increase the service life of the tool

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A PCD tool with a concave complex profile and an ultra-precise and efficient preparation method thereof, comprising the following steps:

[0031] 1) Cut a whole piece of 1.6-16P composite sheet with a diameter of 58mm by wire-cutting slow-feeding method, and cut it into several pieces of PCD blades according to the requirements. 1.6-12P also do the same.

[0032]2) Blade welding: hold the PCD composite sheet and grind it with a green silicon carbide grinding wheel. Then, chamfer the composite sheet, file the PCD composite sheet with a file along the placement direction of the solder, put the composite sheet into acetone solution, clean it in an ultrasonic cleaner, and dry it for later use. Do the same with the tool base. First apply low-temperature flux to the tool groove, and then place the PCD composite sheet. Then put the cutter into the vacuum welding machine, control the brazing temperature from room temperature to 450°, and then keep it for 30 minutes; raise th...

Embodiment 2

[0041] The characteristics of this embodiment are: the first rear angle is thickened: the cutting depth is 0.3mm, the upper cutting width is 0.07mm, the lower cutting width is 0.06mm, the focal length position is 0mm, the incident angle is 6°, the pulse width is 2.4 microseconds, and the frequency is 37037 / 50HZ, the laser power is 67W. Finishing of the first rear corner: depth of cut 0.5mm, width of upper cut 0.04mm, width of lower cut 0.04mm, focal length position 0mm, incident angle 10°, pulse width 0.8 microseconds, frequency 100000 / 32HZ, laser power 70W. Cutting edge and first back angle ultra-finishing: cutting depth 0.3mm, upper cutting width 0.02mm, lower cutting width 0.02mm, focal length position is 0mm, incident angle is 4°, pulse width is 2.4 microseconds, frequency is 35714 / 50HZ , the laser power is 27W. Polishing treatment: cutting depth 0.07mm, upper cutting width 0.02mm, lower cutting width 0.02mm, focal length position 0mm, incident angle 5°, pulse width 0.8 ...

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Abstract

The invention discloses a preparing method of a PCD cutter long in service life. The preparing method comprises the first step of line cutting of a PCD blade, the second step of vacuum welding of the PCD blade, the third step of precise laser machining of the PCD cutter, and the fourth step of the cobalt removing treatment measure of a PCD layer. By means of the manner, the oxidation effect of a front cutter face of the PCD cutter is weakened, meanwhile, the size of a broken blade of a cutting edge is controlled within 2 microns, and distribution of the Co element and the W element at the cutting edge is even. The distribution of the Co element and the W element on a rear cutter face is even along with the increasing of the layer thickness. The welding temperature is reduced through low-temperature welding flux, the tendency of graphitization of the PCD cutter is reduced, and the service life of the cutter is prolonged.

Description

technical field [0001] The invention relates to the field of superhard material processing, in particular to a method for preparing a high-life PCD tool. Background technique [0002] Since the advent of polycrystalline diamond (PCD) in 1972, due to the inheritance of high hardness and wear resistance of diamond, PCD tools can obtain high production efficiency when processing various non-ferrous metals and non-metallic materials; at the same time, because of its hardness The good welding performance between the high-quality alloy substrate and the general metal greatly improves the bending strength of the tool. [0003] The processing advantages of PCD tools are mainly: higher material cutting, improved production cycle; more parts can be processed per shift. Compared with traditional cutting tools, the cutting speed and feed speed are significantly accelerated. At the same time, the surface quality of the workpiece is greatly improved, the dimensional control is excellent...

Claims

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Application Information

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IPC IPC(8): B23P15/28
CPCB23P15/28
Inventor 王必永
Owner WUXI GUOHONG MEASURING & CUTTING TOOLS
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