Shield cutter body and welding process thereof
A welding process and shield knife technology, applied in mining equipment, earthwork drilling, tunnels, etc., can solve the problem of solder loss of silver solder or copper solder, easy cracks of silver solder, and large volume of shield knife and other issues to achieve the effect of low cost, novel design and firm connection
Pending Publication Date: 2019-02-19
武汉新锐合金工具有限公司
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Problems solved by technology
[0003] 1. Since the welding surface of the shield knife is usually a vertical surface, a single silver or copper solder piece is prone to loss of solder due to gravity during the welding process, so the longitudinal surface is not welded firmly;
[0004] 2. Due to the large welding stress of the steel substrate and the hard alloy cutter head during the welding process, a single silver solder or copper solder is prone to cracks, and the larger the bonding area, the larger the cracks;
[0005] 3. Due to the overall heating method and the large volume of the shield cutter body, the heating efficiency is too low
Method used
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[0071] Example: see attached Figure 1~4 As shown, a shield cutter body and its welding process, the shield cutter body includes a cemented carbide cutter head 1, a first welding piece 2, a stainless steel screen 3, The second welding piece 4 and the stainless steel substrate 5; the material of the first welding piece 2 and the second welding piece 4 are the same.
[0072] The welding surface of the cemented carbide cutter head 1 is a right-angled surface composed of two adjacent surfaces, the welding surface is a vertical welding surface 6, and the corners of the two adjacent surfaces are rounded;
[0073] The first welding piece 2, the stainless steel screen 3, and the second welding piece 4 are all rectangular structures, and the rounded corners are set at the corners; the shapes of the three are similar to those of the cemented carbide knife The right-angled surface of the head 1 (that is, the vertical welding surface 6) matches, which is convenient for welding;
[0074]...
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The invention relates to a shield cutter body. The shield cutter body comprises a cemented carbide cutter head, a first welding piece, a stainless steel screen cloth, a second welding piece and a stainless steel base body which are bonded together and welded for combination from front to back in sequence. The first welding piece and the second welding piece are made of a same material. The weldingsurface of the cemented carbide cutter head is a right-angled surface composed of two adjacent faces, the welding surface is a vertical welding surface, and the corners of the two adjacent faces areround corners. The first welding piece, the stainless steel screen cloth and the second welding piece are all right-angled surface structural bodies, and the corners are rounded. The shapes of the first welding piece, the stainless steel screen cloth and the second welding piece are matched with the right-angled surface of the cemented carbide cutter head to facilitate the bonding and welding. A joint part is arranged at the front end of the stainless steel base body in a recessed mode, the surface of the joint part is a right-angled surface, and the corner is rounded. The shape of the joint part is matched with the right-angled surface of the cemented carbide cutter head to facilitate the bonding and welding. The shield cutter body has novel design, firm connection and enhances the success rate of welding, and the stainless steel screen cloth can play the role of resisting impact and oscillation during the use of a brazed joint.
Description
technical field [0001] The invention relates to the technical field of shield working tools, in particular to a shield cutter body and a welding process thereof. Background technique [0002] Shield knives are mainly used for excavation of rock tunnels, and mainly play the role of cutting rocks in the front-end cutting system. Their service life mainly depends on the firmness of the cemented carbide cutter head and the steel substrate welded and fixed. The welding of traditional shield knives usually uses a single silver solder or copper solder, and uses the overall heating method to weld each part. The problems of this traditional welding method include: [0003] 1. Since the welding surface of the shield knife is usually a vertical surface, a single silver or copper solder piece is prone to loss of solder due to gravity during the welding process, so the longitudinal surface is not welded firmly; [0004] 2. Due to the large welding stress of the steel substrate and the h...
Claims
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IPC IPC(8): E21D9/08E21D9/087
CPCE21D9/08E21D9/087E21D9/0879
Inventor 胡永锋刘鹏飞马深塘
Owner 武汉新锐合金工具有限公司