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Method for repairing drill taper shank

A repair method and drill bit technology are applied in the repair field of drill taper shank, which can solve the problems of increasing the frequency of replacing the drill bit, reducing the service life of the drill bit, increasing the processing cost, etc., and achieving the effects of reducing the processing cost, prolonging the service life and improving the strength.

Inactive Publication Date: 2011-01-12
牟涛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Like this, just make the tapered shank of drill bit dismantle frequently from drilling machine or be installed on drilling machine, often rub with the mounting hole of drilling machine, the taper position of drill bit tapered shank is roughened when severe, wears and pulls along with the tapered position of drill bit tapered shank The aggravation of damage will increase the fluctuation on the drilling machine of the drill bit and reduce the drilling accuracy; at the same time, it will also reduce the service life of the drill bit, increase the frequency of replacing the drill bit, and increase the processing cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The method for repairing the taper shank of the drill bit includes the following steps:

[0015] 1) Use a turning tool to remove the surface of the taper shank of the drill bit to a depth of 0.3mm, and turn out a fine thread structure on the outer circle;

[0016] 2) Put the drill bit into the electric furnace and heat it to 200°C, and keep it warm for 2 hours;

[0017] 3) Use pressure sandblasting equipment to perform sandblasting on the surface of the drill bit shank. The pressure of the pressure type sandblasting equipment is controlled at 0.6Kg, and the sandblasting gas is phlegm, so that the surface roughness of the drill bit cone shank reaches Ra of 12um. ; After sandblasting, use phlegm to blow the drill bit shank to clean the surface of the drill bit shank;

[0018] 4) Use plasma spraying equipment to spray a Ni-AI bonding layer on the surface of the drill bit shank, and the thickness of the Ni-AI bonding layer is 0.1mm;

[0019] 5) Using high speed flame spra...

Embodiment 2

[0024] The method for repairing the taper shank of the drill bit includes the following steps:

[0025] 1) Use a turning tool to remove the surface of the taper shank of the drill bit to a depth of 0.35mm, and turn out a fine thread structure on the outer circle;

[0026] 2) Put the drill bit into the electric furnace and heat it to 220°C, and keep it warm for 2.5 hours;

[0027] 3) Use pressure sandblasting equipment to perform sandblasting on the surface of the drill bit shank. The pressure of the pressure type sandblasting equipment is controlled at 0.7Kg, and the sandblasting gas is phlegm, so that the surface roughness of the drill bit cone shank reaches Ra of 13um. ; After sandblasting, use phlegm to blow the drill bit shank to clean the surface of the drill bit shank;

[0028] 4) Use plasma spraying equipment to spray a Ni-AI bonding layer on the surface of the taper shank of the drill bit, and the thickness of the Ni-AI bonding layer is 0.15mm;

[0029] 5) Using high...

Embodiment 3

[0034] The method for repairing the taper shank of the drill bit includes the following steps:

[0035] 1) Use a turning tool to remove the surface of the taper shank of the drill bit to a depth of 0.4mm, and turn out a fine thread structure on the outer circle;

[0036] 2) Put the drill bit into the electric furnace and heat it to 240°C, and keep it warm for 3 hours;

[0037] 3) Use pressure sandblasting equipment to sandblast the surface of the drill bit shank. The pressure of the pressure type sandblasting equipment is controlled at 0.8Kg, and the sandblasting gas is phlegm, so that the surface roughness of the drill bit cone shank reaches Ra of 15um. ; After sandblasting, use phlegm to blow the drill bit shank to clean the surface of the drill bit shank;

[0038] 4) Use plasma spraying equipment to spray a Ni-AI bonding layer on the surface of the taper shank of the drill bit, and the thickness of the Ni-AI bonding layer is 0.2mm;

[0039] 5) Using high speed flame spray...

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Abstract

The invention provides a method for repairing a drill taper shank, which comprises the following steps of: firstly, lathing 0.3 to 0.5 millimeter of depth on the surface of the drill taper shank, heating for sand blast, spraying a Ni-AI binding layer on the surface of the drill taper shank by adopting plasma spraying equipment, and spraying 25 percent of CrNi and 25 percent of Cr3C2 by adopting high-speed flame, wherein the coating thickness is between 0.3 and 0.5 millimeter; secondly, heating the sprayed drill taper shank at the temperature of between 960 and 1,050 DEG C under the condition of rotation, and performing heat preservation for 2 to 3 hours; and finally, grinding the excircle of the drill taper shank by adopting a grinding machine. In the method, a wear-resistant coating is sprayed to the surface of the drill taper shank, and the strength of the drill taper shank is improved to improve the wear-resistant performance and prevent the taper part of the drill taper shank from being pulled, so the service life of the drill taper shank is prolonged, and the machining cost is reduced.

Description

technical field [0001] The invention relates to a method for repairing a drill bit, in particular to a method for repairing a taper shank of a drill bit. Background technique [0002] At present, the drill bits used in conjunction with the drill press need to adopt drill bits of different specifications because of the difference in the diameter of the drilled hole, so different drill bits are often installed or disassembled on the drill press. In this way, the tapered shank of the drill bit is frequently disassembled from the drill press or installed on the drill press, and often rubs against the mounting hole of the drill press. The aggravation of the injury increases the fluctuation on the drilling machine of the drill bit and reduces the drilling accuracy; at the same time, it also reduces the service life of the drill bit, increases the frequency of replacing the drill bit, and increases the processing cost. Contents of the invention [0003] The invention provides a ...

Claims

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Application Information

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IPC IPC(8): B23P6/00
Inventor 牟涛
Owner 牟涛