A method for repairing pin rail tooth wear

Abstract

The present invention is achieved through the following technical solutions: a method for repairing the wear of a pin rail tooth portion, first taking the tooth top with the greatest wear as a reference, performing a knife inspection on the other tooth tops on the same pin rail, then heating the pin rail to 1050-1150 degrees using a 1000KW medium frequency furnace and keeping it warm for one minute, then placing the pin rail in a mold, using a friction press to squeeze the extrusion protrusion from the center of the tooth bottom into the tooth body, and the material squeezed out of the tooth body by the extrusion protrusion squeezes into the tooth top, causing the tooth top to expand, thereby filling the cavity between the mold and the tooth body, thereby achieving the purpose of tooth body repair. The present invention achieves the purpose of tooth body repair by squeezing the material squeezed out of the tooth body by the extrusion protrusion into the tooth top, causing the tooth top to expand, thereby filling the cavity between the mold and the tooth body, thereby making up for the defect of thinning caused by wear on the tooth surface and achieving the purpose of tooth body repair.

Description

Technical Field

[0001] The present invention relates to the field of repair, in particular to the technical field of pin rail tooth repair, and specifically refers to a method for repairing pin rail tooth wear. Background Art

[0002] The pin rail is one of the main components of coal mine fully mechanized mining equipment. There are several teeth on the pin rail, which cooperate with the traveling teeth of large machinery to realize the travel of large machinery. Since the traveling teeth and the tooth bodies are in cooperation, the tooth bodies are easily worn. The parts with the most serious wear are the tooth tops and the two sides of the tooth bodies.

[0003] After the pin rail teeth are worn, the tooth wear gap increases and the pin rail cannot be used. Therefore, a new pin rail needs to be replaced with the worn pin rail. The replaced pin rail is treated as waste, which causes a great waste of resources. At the same time, due to the large demand for pin rails, a method for repairing the pin rails is urgently needed. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a method for repairing pin rail tooth wear, which repairs the worn pin rail, reduces resource waste, and meets market demand.

[0005] The present invention is achieved through the following technical solution: a method for repairing wear of a pin rail tooth portion, comprising the following steps:

[0006] a. Place the pin rail on the machine tool, and use the tooth top with the greatest wear as a reference to perform tool inspection on the other tooth tops on the same pin rail to ensure that all tooth tops on the same pin rail are flush, which is convenient for controlling the quality and accuracy of subsequent processing;

[0007] b. On different pin rails, the maximum wear degree of the tooth top is different, so the size of the tool inspection for different pin rails is different. After the tool inspection is completed, the pin rails are classified according to the tooth top length to facilitate the next step of restoring the tooth body size accurately;

[0008] c. Heat the pin rail to 1050-1150 degrees in a 1000KW medium frequency furnace and keep it warm for one minute. After removing the oxide scale, put the pin rail into the mold, and place the mold on the press. Then install the extrusion plate on the press. At this time, the extrusion protrusion on the extrusion plate corresponds to the tooth body on the pin rail one by one, and the center of the extrusion protrusion is right at the center of the tooth bottom. Then the press pushes the extrusion plate toward the pin rail, and the extrusion plate drives the extrusion protrusion to move from the tooth bottom to the tooth top. The extrusion protrusion is squeezed from the center of the tooth bottom into the interior of the tooth body. The material squeezed out of the tooth body by the extrusion protrusion squeezes into the tooth top, causing the tooth top to expand, thereby filling the cavity between the mold and the tooth body, thereby achieving the purpose of tooth body repair;

[0009] d. After the repair is completed, the pin rail will undergo subsequent heat treatment process.

[0010] The present invention achieves the purpose of tooth body repair by squeezing the material squeezed out by the extrusion protrusion in the tooth body into the tooth top, causing the tooth top to expand, thereby filling the cavity between the mold and the tooth body, thereby compensating for the defect of wear and thinning of the tooth body surface and achieving the purpose of tooth body repair.

[0011] Preferably, before extrusion, the extrusion plate and the die are mounted on a die base and preheated.

[0012] Preferably, phosphating equipment is used to remove the oxide scale on the rail surface.

[0013] Preferably, the extrusion protrusion is in a truncated cone shape, and the large diameter end of the extrusion protrusion is fixedly connected to the extrusion plate.

[0014] This preferred solution facilitates the extrusion protrusion to be squeezed into or pulled out of the tooth body by setting the shape of the extrusion protrusion.

[0015] The beneficial effects of the present invention are: by squeezing the material squeezed out of the tooth body by the extrusion protrusion into the tooth top, the tooth top expands, thereby filling the cavity between the mold and the tooth body, thereby achieving the purpose of tooth body repair, thereby compensating for the defects of wear and thinning on the tooth body surface, and achieving the purpose of tooth body repair; by setting the shape of the extrusion protrusion, it is convenient for the extrusion protrusion to be squeezed into the tooth body or pulled out of the tooth body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the damaged pin rail after repair;

[0017] Figure 2 for Figure 1 Schematic diagram of the cross section at the middle BB;

[0018] Figure 3 This is a schematic diagram of a damaged pin rail;

[0019] Figure 4 for Figure 3 Schematic diagram of the cross section at AA;

[0020] Figure 5 This is the three-view drawing of the extruded plate;

[0021] Figure 6 It is the three-view drawing of the pressure plate;

[0022] Figure 7 Three views of the mold when closing;

[0023] As shown in the figure:

[0024] 1. Pin track, 2. Pin hole, 3. Tooth body, 4. Worn part of the tooth body, 5. Countersunk groove, 6. Tooth bottom, 7. Tooth top, 8. Ear groove, 9. Positioning block, 10. Extrusion protrusion, 11. Extrusion groove, 12. Ejection hole. DETAILED DESCRIPTION

[0025] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0026] Refer to the attached Figure 1-7 The pin rail 1 is one of the main components of coal mine comprehensive mining equipment. The pin rail 1 includes two cross beams and a number of tooth bodies 3 located between the two cross beams and arranged in sequence along the extension direction of the cross beams. The two sides of the tooth body 3 are respectively fixed to the two cross beams. Two ears protruding downward and arranged along the extension direction of the cross beam are provided on the bottom surface of one of the cross beams. Pin holes 2 are provided on both ears. The bottom surface of the tooth body 3 is a downwardly protruding arc surface. The tooth body 3 cooperates with the traveling teeth of large machinery to realize the travel of large machinery. Since the traveling teeth and the tooth body 3 are in cooperation, the tooth body 3 is susceptible to wear. The most severely worn parts are the tooth top 7 of the tooth body 3 and the two side surfaces of the tooth body 3.

[0027] In order to reduce resource waste and meet market demand, the present invention provides a method for repairing pin rail tooth wear, comprising the following steps:

[0028] a. By matching the positioning pins with the pin holes 2 at the two ears of the pin rail 1, place the pin rail 1 on the machine tool. Using the tooth top 7 with the greatest wear as a reference, perform a tool inspection on the other tooth tops 7 on the same pin rail 1 to ensure that all tooth tops 7 on the same pin rail 1 are flush, which facilitates the control of the subsequent processing quality and processing accuracy.

[0029] b. On different pin rails 1, the maximum wear degree of the tooth top 7 is different, so the size of the tool inspection of different pin rails 1 is different. After the tool inspection is completed, the pin rails 1 are classified according to the length of the tooth top 7 to facilitate the next step of restoring the accurate size of the tooth body 3;

[0030] c. Heat the pin rail 1 to 1100 degrees with a 1000KW medium frequency furnace and keep it warm for one minute. Then, remove the oxide scale of the pin rail 1 through the phosphating equipment, and preheat the extrusion plate and the pressure plate. Then put the pin rail 1 into the pressure plate, insert the tooth top 7 of the tooth body 3 into the extrusion groove 11, and place the pressure plate on the press. Then install the extrusion plate on the press. At this time, the several extrusion protrusions 10 on the extrusion plate correspond to the several tooth bodies 3 one by one, and the center of the extrusion protrusion 10 is facing the center of the bottom surface of the tooth body 3. Then, the press pushes the extrusion plate toward the pin rail 1. The extrusion plate drives the extrusion protrusion 10 to move from the bottom surface of the tooth body 3 to the tooth top 7. The extrusion protrusion 10 is squeezed into the interior of the tooth body 3 from the center of the bottom surface of the tooth body 3. The material extruded by the extrusion protrusion 10 in the tooth body 3 is squeezed into the tooth top 7, causing the tooth top 7 to expand, thereby filling the cavity between the extrusion groove 11 and the tooth body 3, thereby compensating for the defect of surface wear and thinning of the tooth body 3 and achieving the purpose of repairing the tooth body 3;

[0031] d. After the repair is completed, the pin rail 1 is subjected to subsequent heat treatment process.

[0032] A positioning pin that matches the pin hole 2 is provided on the machine tool.

[0033] The mold includes a pressure plate, and a plurality of extrusion grooves 11 are provided on the top surface of the pressure plate. The extrusion grooves 11 are arranged in a one-to-one correspondence with the tooth body 3. The tooth top 7 of the tooth body 3 is inserted into the extrusion groove 11. The size of the extrusion groove 11 is adapted to the size of the standard tooth top 7. The bottom surface of the pressure plate is also provided with an ejection hole 12 extending upward and connected to the bottom surface of the extrusion groove 11.

[0034] The bottom surface of the extrusion plate is provided with an extrusion protrusion 10 which corresponds to the tooth body 3 one by one and protrudes downward. The center of the extrusion protrusion 10 is opposite to the center of the bottom surface of the tooth body 3. The extrusion protrusion 10 is truncated cone-shaped. The large diameter end of the extrusion protrusion 10 is fixed to the extrusion plate, that is, the extrusion plate is fixed with a plurality of extrusion protrusions 10 arranged along its extension direction. Due to the extrusion of the extrusion protrusion 10, a sink groove 5 adapted to the extrusion protrusion 10 is formed on the repaired tooth body 3.

[0035] The bottom surface of the extrusion plate is also provided with ear grooves 8 for inserting the two ears of the pin rail 1.

[0036] Four positioning blocks 9 arranged in a rectangular shape are provided on the bottom surface of the extrusion plate, and positioning grooves adapted to the positioning blocks 9 are provided on the top surface of the pressure-bearing plate.

[0037] The present invention squeezes the extrusion protrusion 10 from the center of the tooth bottom 6 into the tooth body 3, so that the material squeezed out of the tooth body 3 by the extrusion protrusion 10 is squeezed into the tooth top 7, causing the tooth top 7 to expand and become fatter, thereby filling the cavity between the extrusion groove 11 and the tooth body 3, compensating for the defect of wear and thinning of the tooth body 3, and achieving the purpose of repairing the tooth body 3, thereby reducing resource waste and meeting market demand; the shape of the extrusion protrusion 10 is set to facilitate the extrusion protrusion 10 to be squeezed into the tooth body 3; the setting of the extrusion groove 11 limits the flow of material in the tooth, thereby ensuring that the repaired tooth body 3 reaches the required size of the normal tooth body 3.

[0038] Of course, the above description is not limited to the above examples. Technical features not described in the present invention can be achieved by or by adopting existing technologies, which will not be described here. The above embodiments and drawings are only used to illustrate the technical solutions of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not depart from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A method for repairing pin rail tooth wear, characterized in that: The following steps are involved: a. Place the pin rail (1) on the machine tool, and use the tooth top (7) with the greatest wear as a reference to perform a tool inspection on the other tooth tops (7) on the same pin rail (1), so that all tooth tops (7) on the same pin rail (1) are flush, which is convenient for controlling the quality and accuracy of subsequent processing; b. On different pin rails (1), the maximum degree of wear of the tooth top (7) is different, so the sizes of the knife inspections of different pin rails (1) are different. After the knife inspection is completed, the pin rails (1) are classified according to the length of the tooth top (7) to facilitate the next step of restoring the accurate size of the tooth body (3); c. The pin rail (1) is heated to 1050-1150 degrees using a 1000KW medium frequency furnace and kept warm for one minute. After removing the oxide scale, the pin rail (1) is placed in the mold, and the mold is placed on the press. Then, the extrusion plate is installed on the press. At this time, the extrusion protrusion (10) on the extrusion plate corresponds to the tooth body (3) on the pin rail (1), and the center of the extrusion protrusion (10) is opposite to the center of the tooth bottom (6). Then, the press pushes the extrusion plate toward the pin rail (1). The extrusion plate drives the extrusion protrusion (10) to move from the tooth bottom (6) to the tooth top (7). The extrusion protrusion (10) is squeezed from the center of the tooth bottom (6) into the interior of the tooth body (3). The material squeezed out of the extrusion protrusion (10) in the tooth body (3) is squeezed into the tooth top (7), causing the tooth top (7) to expand, thereby filling the cavity between the mold and the tooth body (3), thereby achieving the purpose of repairing the tooth body (3); d. After the repair is completed, the pin rail (1) is subjected to subsequent heat treatment process.

2. The pin rail tooth wear repair method according to claim 1, characterized in that: Before extrusion, the extrusion plate and die are mounted on the die base for preheating.

3. The pin rail tooth wear repair method according to claim 1, characterized in that: Use phosphating equipment to remove the oxide scale on the surface of the rail (1).

4. The pin rail tooth wear repair method according to claim 1, characterized in that: The extrusion protrusion (10) is in the shape of a truncated cone, and the large-diameter end of the extrusion protrusion (10) is fixedly connected to the extrusion plate.

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