Heavy pin shaft dismounting method

Abstract

The invention discloses a heavy pin shaft dismounting method. The method comprises the following steps: (1) dismounting a pin shaft end plate; (2) perforating the center of the pin shaft; (3) cooling the pin shaft; (4) the pin shaft is knocked, whether the pin shaft is loosened or not is determined, if yes, the step (5) is executed, and if not, the step (6) is executed; (5) the transition cushion block is held by hand, and the pin shaft is repeatedly knocked until the pin shaft is dismantled; (6) grooving the upper side and the lower side of the through hole; (7) repeating the step (3), the step (4) and the step (5) until the pin shaft is dismounted; (8) if the pin shaft is still not loosened, cutting the pin shaft; and (9) the transition cushion block is held by hand, and the pin shaft is repeatedly knocked until the pin shaft is dismantled. According to the heavy pin shaft disassembling method, the step sequence design is reasonable, a multi-stage treatment scheme is adopted, the treatment scheme can be gradually upgraded according to an actual notch in the actual operation process, a pin shaft hole is not prone to being damaged, later-period new pin shaft installation is prevented from being affected to the maximum extent, the applicability is good, operation is convenient, and the application prospect is good.

Description

Technical Field

[0001] The invention relates to the technical field of equipment maintenance, and in particular to a heavy pin disassembly method, which has good applicability, is easy to operate, has simple steps, and does not affect the later installation of a new pin. Background Art

[0002] Pins are usually used to connect two structural parts to meet the need for relative rotation between the components. They are widely used in mechanical equipment connections. Generally, heavy-duty pins and pin holes are connected by tight fit, and the installation clearance is small. At the same time, the poor working environment of the pins will inevitably lead to wear and corrosion of the pin parts, which further increases the difficulty of disassembly and assembly of heavy-duty pins.

[0003] At present, the traditional method of dismantling heavy pins is to use tooling and jacks (hydraulic) to use pressure to push the pins out. This operation often results in "small-tonnage jacks cannot push it out, and large-tonnage jacks will cause deformation of the tooling and equipment body". Sometimes, even a 30-ton or even 50-ton jack cannot be dismantled, and it is particularly labor-intensive, time-consuming, and labor-intensive. In addition, there is another method for dismantling heavy pins on site, which is to wedge a transition pad between the pin and the heavy hammer, and then use a crane to lift the heavy hammer and repeatedly hammer until the pin is removed. However, repeated hammering will cause structural changes in the heavy pin, which will affect the pin hole and make it impossible to reinstall it. In addition, this method is also affected by geographical and spatial factors, and some are not suitable for this operation method.

[0004] Therefore, it is of great practical significance to develop a heavy-duty pin disassembly method that has good applicability, is easy to operate, has simple steps, and does not affect the subsequent reinstallation of the pin. Summary of the invention

[0005] Due to the above-mentioned defects in the prior art, the present invention provides a heavy-duty pin disassembly method which has good applicability, is easy to operate, has simple steps and does not affect the later reinstallation of the pin, so as to solve the problems that the current heavy-duty pin disassembly method is time-consuming and labor-intensive to operate, will cause damage to the pin hole and affect the later reinstallation of the pin, and has general applicability.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A heavy pin disassembly method comprises the following steps:

[0008] (1) Remove the pin end plate;

[0009] (2) Drill a hole in the center of the pin;

[0010] (3) Cooling pin;

[0011] (4) Tap the pin to check whether it is loose. If so, proceed to step (5); otherwise, proceed to step (6);

[0012] (5) Hold the transition block and repeatedly hit the pin until the pin is removed;

[0013] (6) Slotting the upper and lower sides of the perforation;

[0014] (7) Repeat steps (3), (4) and (5) until the pin is removed;

[0015] (8) If the pin is still not loose, cut off the pin;

[0016] (9) Hold the transition block and repeatedly strike the pin until the pin is removed.

[0017] The heavy-duty pin disassembly method of the present invention has a reasonable step-by-step design and adopts a multi-stage processing scheme. During actual operation, the processing scheme can be gradually upgraded according to the actual gap. It can meet the disassembly needs of different heavy-duty pins, is not easy to damage the pin holes, and avoids affecting the later installation of new pins to the greatest extent. It has good applicability and is easy to operate, and has good application prospects.

[0018] As the preferred technical solution:

[0019] In the above-mentioned method for disassembling a heavy pin, safety measures need to be taken before step (1) to ensure the safety of the equipment and operators after the pin is removed.

[0020] In the heavy-duty pin disassembly method as described above, the removal of the pin end plate is accomplished by using a wrench.

[0021] In the above-mentioned heavy pin disassembly method, the center hole and slotting of the pin are both completed by using an oxygen melting rod.

[0022] In the heavy pin disassembly method as described above, the pin cooling is accomplished by utilizing water.

[0023] As one method of heavy duty pin removal described above, hammering the pin is accomplished using a sledgehammer.

[0024] In the above-mentioned method for disassembling a heavy pin shaft, the cutting off of the pin shaft is completed by using a cutting gun.

[0025] In the above-mentioned method for disassembling a heavy pin shaft, the cutting off of the pin shaft specifically involves cutting a hole in the pin shaft.

[0026] A heavy pin disassembly method as described above, wherein the perforation is a round hole;

[0027] The slots on the upper and lower sides of the through hole are rectangular and symmetrical with respect to the symmetry axis of the through hole.

[0028] The above technical solution is only a feasible technical solution of the present invention, and the protection scope of the present invention is not limited thereto. Those skilled in the art can reasonably adjust the specific design according to actual needs.

[0029] The above invention has the following advantages or beneficial effects:

[0030] The heavy-duty pin disassembly method of the present invention has a reasonable step-by-step design and adopts a multi-stage processing scheme. During actual operation, the processing scheme can be gradually upgraded according to the actual gap. It can meet the disassembly needs of different heavy-duty pins, is not easy to damage the pin holes, and avoids affecting the later installation of new pins to the greatest extent. It has good applicability and is easy to operate, and has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention and its features, appearance and advantages will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings. The same reference numerals indicate the same parts in all the drawings. The drawings are not drawn to scale, and emphasis is placed on illustrating the subject matter of the present invention.

[0032] Figure 1 This is a schematic diagram of pin processing;

[0033] Among them, 1 is the pin hole outer cylinder, 2 is the pin shaft, 3 is the through hole, and 4 is the slot. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0035] Example 1

[0036] A heavy pin disassembly method comprises the following steps:

[0037] Step 1: Take measures to ensure the safety of equipment and operators after the pin is removed;

[0038] Step 2: Use a wrench to remove the pin end plate;

[0039] Step 3: Use an oxygen melting rod to make a hole 3 in the center of the pin 2;

[0040] Step 4: Use water to cool the pin;

[0041] Step 5: Use a sledgehammer to hit the pin to see if it is loose;

[0042] Step 6: If there is any looseness, hold the transition block and repeatedly hit it with a sledgehammer until the pin is removed:

[0043] Step 7: If there is no looseness, use the oxygen melting rod to make grooves 4 above and below the round hole again (such as Figure 1 shown);

[0044] Step 8: Repeat steps 4, 5, and 6 until the pin is removed;

[0045] Step 9: If there is still no looseness according to the above steps, use a cutting gun to cut a hole in the pin shaft;

[0046] Step 10: Hold the transition block again and strike it repeatedly with a sledgehammer until the pin is removed.

[0047] It has been verified that the heavy-duty pin disassembly method of the present invention has a reasonable step-by-step design and adopts a multi-stage processing scheme. During actual operation, the processing scheme can be gradually upgraded according to the actual gap. It can meet the disassembly needs of different heavy-duty pins, is not easy to damage the pin holes, and avoids affecting the later installation of new pins to the greatest extent. It has good applicability and is easy to operate, and has good application prospects.

[0048] Those skilled in the art should understand that those skilled in the art can implement variations by combining the prior art and the above embodiments, which will not be described in detail here. Such variations do not affect the essential content of the present invention, and will not be described in detail here.

[0049] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the present invention without departing from the scope of the technical solutions of the present invention, or modify them into equivalent embodiments of equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention are still within the scope of protection of the technical solutions of the present invention.

Claims

1. A heavy pin disassembly method, characterized in that: The following steps are involved: (1) Remove the pin end plate; (2) Drill a hole in the center of the pin; (3) Cooling pin; (4) Tap the pin to check whether it is loose. If so, proceed to step (5); otherwise, proceed to step (6); (5) Hold the transition block and repeatedly hit the pin until the pin is removed; (6) Slotting the upper and lower sides of the perforation; (7) Repeat steps (3), (4) and (5) until the pin is removed; (8) If the pin is still not loose, cut off the pin; (9) Hold the transition block and repeatedly strike the pin until the pin is removed.

2. A heavy pin disassembly method according to claim 1, characterized in that: Before step (1), safety measures must be taken to ensure the safety of the equipment and operators after the pin is removed.

3. A heavy pin disassembly method according to claim 1, characterized in that: The removal of the pin shaft end plate is completed by using a wrench.

4. A heavy pin disassembly method according to claim 1, characterized in that: The center hole and slotting of the pin are both completed using oxygen-melted rods.

5. A heavy pin disassembly method according to claim 1, characterized in that: The cooling of the pin shaft is accomplished by using water.

6. A heavy pin disassembly method according to claim 1, characterized in that: Driving the pins is done using a sledgehammer.

7. A heavy pin disassembly method according to claim 1, characterized in that: The cutting of the pin shaft is completed by using a cutting gun.

8. A heavy pin disassembly method according to claim 7, characterized in that: The cutting off of the pin shaft specifically involves cutting an opening in the pin shaft.

9. A heavy pin disassembly method according to claim 1, characterized in that: The perforations are round holes; The slots on the upper and lower sides of the through hole are rectangular and symmetrical with respect to the symmetry axis of the through hole.

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