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Manufacturing method of shield machine scraper

A manufacturing method and shield machine technology, applied in the direction of manufacturing tools, metal processing equipment, welding equipment, etc., can solve the problems of low welding strength, small adaptable range, wear, etc., and achieve the effect of large profits

Active Publication Date: 2013-04-03
LUOYANG JIUJIU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Scrapers of various shapes are one of the special knives used by the shield machine for cutting pebbles and rock formations. They are installed in combination or separately on the cutter head and penetrated into rock pebbles or soil layers during tunnel construction. At the same time, the cutter head is The revolution is realized under the drive of the rotating device, so that the cutter can continuously excavate and peel off the pebbles and slag on the rock pebbles or soil layers. However, most of the large scrapers used in domestic shield machines are equipped with large carbide blades on the alloy cutter body. The structure, the connection method is mostly brazing, the welding strength is not high, and the general scope of application is small. When encountering large pebbles, it is easy to cause impact on the ground, easy to fall off, and the cutter body is worn out. It cannot meet the increasing requirements for the strength of the cutter.

Method used

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  • Manufacturing method of shield machine scraper
  • Manufacturing method of shield machine scraper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The production of the cutter body 1, as shown in the accompanying drawings, will select the required blanking amount according to the size of the drawing of the cutter body 1, and carry out die forging with a forging die to form the blank of the cutter body 1, and place the blank of the cutter body 1 Carry out annealing treatment in the heat treatment furnace, and then carry out mechanical rough machining, and then place the roughly machined cutter body 1 blank in the heat treatment furnace again, and carry out intermediate heat treatment to make its hardness at HRC40-45; side, surfacing and coating wear-resistant layer 5, and then on the CNC machine tool body 1 side, carry out mechanical precision machining to form an alloy blade step, and then process at least one U-shaped groove on the outer periphery of the cutter body 1, and braze in the U-shaped groove The auxiliary blade 3, the main blade 4 and the main blade 2 at the brazing end are sequentially brazed on the ste...

Embodiment 2

[0019] Make preparations first, choose an intermediate frequency induction heating power supply with matching power, adjust the brazing tooling, and make an open heating coil, so that the distance between the coil and the welding cutter body is 3-4mm; then according to the size of the brazing veneer Cut the appropriate size of sheet solder (the solder is a sheet made of silver, nickel, copper, zinc, cadmium and other alloy elements selected according to the characteristics of the scraper) and the stainless steel mesh pad in the middle slices; then clean the scraper body and the hard alloy blades with an ultrasonic cleaning solution for later use.

Embodiment 3

[0021] The method of preparing flow-blocking brazing flux is to select silver brazing flux and pure water in a ratio of 3:1 (cubic meter=m3) and mix thoroughly into a paste, and heat at 55°C to 60°C and stir evenly without particulate matter for use. Note that the paste flux should not be used when stratification occurs, it must be reheated and stirred evenly before use. The selection and cleaning of stainless steel mesh gaskets, select stainless steel mesh gaskets, first clean the oil stains with industrial alcohol, and then use nitric acid and water to make pickling solution at a ratio of 3:17 (% by weight) to etch and clean for 5 minutes (to remove oxidation). Membrane), in this step, the pickling solution should be prepared strictly according to the required ratio, and cleaned according to the specified time to avoid incomplete cleaning or over-corrosion. Then rinse with hot water and immediately put it into the prepared paste brazing flux to soak before use. This step mu...

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Abstract

The invention relates to a manufacturing method of a shield machine scraper. The manufacturing method comprises the following steps of: selecting the required feeding amount of a manufactured steel ingot according to the drawing size of a scraper body, carrying out die forging on the steel ingot by using a forging die to manufacture a scraper body blank, putting the scraper body blank in a thermal treatment furnace to carry out annealing treatment, and then carrying out mechanical rough machining on the scraper body blank, then putting the scraper body blank subjected to rough machining into the thermal treatment furnace again to carry out intermediate thermal treatment, so that the hardness of the scraper body blank is HRC 42-45; and then respectively overlying and coating a wear resistant layer on two sides of the scraper body, carrying out mechanical precise machining on one side of the scraper body on a numerically-controlled machine tool to form an alloy blade step and then machining at least one U-shaped groove in the periphery of the scraper body, brazing an auxiliary blade in the U-shaped groove, and sequentially brazing an end main blade and a main blade on the step at the outer side of the scraper body.

Description

technical field [0001] The invention relates to a technology for manufacturing shield machine tool accessories, in particular to a method for manufacturing a shield machine scraper. Background technique [0002] With the rapid development of my country's modern economic construction, the construction of tunnel projects represented by the subway is in full swing. To develop in a higher direction. The shield construction method is widely used in tunnel construction, and it is the best choice for modern tunnel construction, and the shield machine is a modern professional equipment used in the shield construction method. Scrapers of various shapes are one of the special knives used by the shield machine for cutting pebbles and rock formations. They are installed in combination or separately on the cutter head and penetrated into rock pebbles or soil layers during tunnel construction. At the same time, the cutter head is The revolution is realized under the drive of the rotating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B23K1/002B23K1/20
Inventor 王汉章李晓红李伟陈晓峰李辉许尚新
Owner LUOYANG JIUJIU TECH
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