A processing method for hollow grouting bolt body with special-shaped threads
A processing method and technology for grouting bolts, which can be used in the installation of bolts, hollow objects, metal processing equipment, etc., can solve the problems of low efficiency, reduced elongation of the rod body, and high cost of bolts, and can reduce the cost of raw materials and the surface roughness. The effect of reducing degree, good economic and social benefits
Active Publication Date: 2021-07-20
淮南东华欧科矿山支护设备有限责任公司
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Problems solved by technology
[0004] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a method for processing the body of a special-shaped threaded hollow grouting anchor rod, which solves the problems of high cost, low efficiency, and especially the reduction of elongation of the rod body.
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Embodiment 1
[0057] The processing method adopted for the special-shaped thread hollow grouting bolt body is to press the initial pipe with an outer diameter of 42.5mm and a wall thickness of 4mm into an anchor rod with an outer diameter of 26mm and a wall thickness of 7.5mm by spinning forging method, which specifically includes the following steps :
[0058] (1) Material preparation: cutting and blanking the incoming material pipe to obtain a material pipe 1 with a length of 42.5 mm and a pipe wall thickness of 4 mm;
[0059] (2) Feeding: Use the automatic feeder to transfer the material tube 1 to the feeder, and send the material tube 1 to the high-frequency induction heating equipment through the feeder, and heat the material tube 1 to the high-frequency induction heating equipment. 950°C, and then transported to the extruder through the feeder;
[0060] (3) Rotary forging: install the material tube 1 on the turntable of the extrusion machine, the turntable drives the material tube 1 ...
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Abstract
The invention discloses a method for processing a hollow grouting bolt body with special-shaped threads. The processing method is sequentially carried out according to the following steps: material preparation, material feeding, rotary forging, rolling and heat treatment. The rotary forging step includes the following steps: primary spinning: making the end of the material tube deform along the inclined direction of the buffer hole surface to obtain a partially thickened material tube at the end; secondary spinning: making the end of the material tube along the horizontal hole surface At the same time, the middle part of the material tube is deformed along the inclination direction of the buffer hole surface to obtain a material tube with all thickened ends; repeated spinning: to obtain an overall thickened material tube; the method of spinning forging is used for The anchor rod parts that play the role of grouting, support, connection, etc. in the support field provide a processing method for the hollow grouting anchor rod with special-shaped threads; the seamless steel pipe is compressed to increase the strength of the seamless steel pipe itself, and due to The spinning step makes the anchor bolt uniform in force, uniform in wall thickness, precise in compression, and increased in shear strength.
Description
technical field [0001] The invention relates to the technical field of mine and tunnel anchoring and support, in particular to a method for processing a hollow grouting bolt body with special-shaped threads. Background technique [0002] At present, the hollow grouting bolt has been widely used in the support or reinforcement projects of mine shafts and tunnels. It includes backing plates, nuts and other components. The anchor rod is also used as a grouting pipe. The grouting material fills the cracks in the surrounding rock through the hollow structure of the rod body, so that the surrounding rock can be bonded to reinforce the overall structure, and at the same time fill the anchor hole to realize the full-length anchoring of the anchor rod. [0003] The hollow grouting bolt realizes the anchoring effect by limiting the displacement of the surrounding rock within the anchorage range. There are many factors that affect the anchoring effect of the hollow grouting bolt, among...
Claims
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IPC IPC(8): B21J5/00B21K21/00E21D21/00
CPCB21J5/002B21K21/00E21D21/00
Inventor 张辉
Owner 淮南东华欧科矿山支护设备有限责任公司