Method for mfg of double-metal saw blade

A manufacturing method and bi-metal technology, which are applied in the tool manufacturing of sawing machine devices, metal sawing equipment, manufacturing tools, etc., can solve the problem of reduced service life of saw belts, low hardness and wear resistance of saw teeth, and impact on saw belt fatigue resistance. strength, etc.

Inactive Publication Date: 2003-10-22
浙江汇达精密机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The manufacture of bimetallic saw blades through the above process often has the following disadvantages: First, when the saw teeth and the saw band are heat treated at the same time, the metallographic structure of the saw band will be damaged if the temperature is too high, and ...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: Heat treatment on the sawtooth material. The heat treatment is to heat the sawtooth material to 1200°C. Of course, it can also be heated to 1150°C or 1250°C or to other values ​​between 1150°C and 1250°C. After 25 minutes, it can also be 20 Minutes or 30 minutes or other values ​​between 20 and 30 minutes, cool to room temperature in a vacuum furnace, and then immerse the sawtooth material in -90°C liquid nitrogen, the temperature of the liquid nitrogen can also be -100°C or - 80°C or other values ​​between -100°C and -80°C, the purity of the liquid nitrogen is not less than 99%; finally, in a vacuum state, it is heated to 500°C or 450°C or 565°C or between 450°C and 550°C Temper 3 times at other temperature values ​​between 3 to 4 hours, of course, it can also be 2 or 4 times. On the one hand, the above heat treatment improves the hardness and wear resistance of the sawtooth material, making the hardness of the sawtooth material reach HIC68; on the other han...

Embodiment 2

[0018] Embodiment 2: As an improvement of the above embodiment, the sawtooth material after the heat treatment in the foregoing embodiment is also coated on the surface, the coating is electrolytic copper plating, and the thickness of the surface coating is 3 microns, of course it can also be 2 microns. -5 microns for other values. The coating can also be silver.

Embodiment 3

[0019] Embodiment 3: As an improvement of Embodiment 1 or Embodiment 2, after the sawtooth material is welded to the saw band, before cutting the sawtooth material, low-temperature tempering is performed on the saw band welded with the sawtooth material, that is, the sawtooth will be welded. The saw band of the material is heated to 250°C, or 220°C or 280°C or other temperature values ​​between 220°C and 280°C. After 2 hours, it can also be 1.5 hours or 2.5 hours or 1.5 to 2.5 hours. other values, then cool. Low temperature tempering can also be repeated 2 or 3 times.

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Abstract

The production method of bimetal saw blade for cutting metal includes the following three procedures: 1. heat treatment of saw-tooth material; 2. welding the azotized saw-tooth material on the saw band, adopting instantaneous electric welding process, and the energization time of the weld is not greater 1 second; 3. cutting saw-tooth material on the saw band, adopting laser cutting process and cutting the saw-tooth material into the saw-tooth form. Said invention is characterized by that said invented bimetal saw blade is made up by equidistantly welding several saw-tooth materials on the saw band and cutting them, and after the heat treatment of the saw-tooth material a coating process is added, so that the saw-tooth material can be easily welded on the saw band.

Description

(1) Technical field [0001] The invention relates to a method for manufacturing a metal saw blade, in particular to a method for manufacturing a bimetal saw blade for cutting metal. (2) Background technology [0002] The bimetallic saw blade for general cutting metal includes a saw band and equidistant saw teeth on the saw band. The saw band is made of spring steel, and the saw teeth are generally made of high-speed tool steel. The process generally adopts welding of high-speed tool steel on the saw band. After the bar, the tooth-shaped serrations are cut on the high-speed tool steel bar, and then made through a heat treatment process. [0003] The Chinese Patent Office disclosed the specification for the patent application "Heat Treatment Process for Bi-Metal Saw Blades" on June 23, 1993. Its announcement number is 1073485, and its application number is 92108196. (1) Heating; (2) Cooling; (3) Tempering; (4) Co-infiltration; (5) Oxidation. [0004] The manufacture of bimeta...

Claims

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Application Information

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IPC IPC(8): B23D65/00B23P13/00
Inventor 倪柏钢
Owner 浙江汇达精密机械有限公司
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