A primer coating skid fulcrum and its processing method

Abstract

This invention relates to a primer coating skid fulcrum and its processing method. The fulcrum includes a fulcrum mounting block, an inner rotating half-pin, an outer rotating half-pin, a limiting rotating disk, and an elastic plate. The fulcrum mounting block consists of a fulcrum mounting plate, a fulcrum reinforcing plate, a rotating pin mounting block, and a spring plate mounting plate; the inner rotating half-pin consists of a locking fulcrum and an inner rotating half-pin; the outer rotating half-pin consists of a locking fulcrum and an outer rotating half-pin. This invention achieves a self-locking function: when the positioning holes of the vehicle body pass through the inner and outer sets of positioning pins, under the action of gravity, the inner and outer rotating pins will pass through the holes and deflect to both sides after passing through the holes, achieving self-locking. It has a wide range of applications and good compatibility; the processed parts undergo heat treatment, machining, and assembly processes, resulting in high precision of each component, complete release of internal stress, good consistency of finished products, and flexible interchangeability of each component; all mating surfaces of each component undergo heat treatment, improving hardness and wear resistance.

Description

Technical Field

[0001] This invention belongs to the field of automotive technology, specifically relating to a paint primer skid fulcrum and its processing method. Background Technology

[0002] Currently, in some vehicle assembly plant painting workshops, the primer line, which generally refers to pretreatment, electrophoresis, and electrophoresis drying, requires locking the conveyor skid to the body-in-white and using the skid to support the body for the process. During the locking process, a locking device must be used to secure the skid to the body. When the locking device malfunctions, it cannot automatically lock the skid to the body, which can easily lead to the body coming off. Summary of the Invention

[0003] The purpose of this invention is to provide a partially self-locking primer skid support structure for painting and its manufacturing method, so as to solve the problem of locking the skid to the vehicle body.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] A primer coating skid fulcrum includes a fulcrum mounting block portion, an inner rotating half-pin portion, and an outer rotating half-pin portion;

[0006] The fulcrum mounting block is composed of a fulcrum mounting plate 1, a fulcrum reinforcing plate 2, a rotary pin mounting block 3, and a spring plate mounting plate 13. The rotary pin mounting block 3 is connected to the fulcrum mounting plate 1, and the fulcrum reinforcing plate 2 is connected between the rotary pin mounting block 3 and the fulcrum mounting plate 1. The spring plate mounting plate 13 is connected to the rear side of the limiting rotary disk mounting boss.

[0007] The inner rotating half-pin part consists of a locking fulcrum 4 and an inner rotating half-pin 5; the locking fulcrum 4 is a lower semi-cylinder, a middle semi-cylinder with a cut frustum, and an upper semi-conical structure. The lower part is provided with two threaded holes for installing the locking fulcrum 4 on the inner rotating half-pin 5. The upper surface of the lower semi-cylinder is cut with a frustum between the upper surface and the upper semi-conical structure; the inner rotating half-pin 5 is an irregular structure. The upper part is provided with the mounting hole of the locking fulcrum 4 and the bolt through hole of the fixing bolt. The middle part is provided with the through hole of the inner rotating half-pin fixing shaft 6. The lower part is provided with the rotation limiting shaft.

[0008] The outer rotating half-pin part is composed of a locking fulcrum 4 and an outer rotating half-pin 7; the outer rotating half-pin 7 is an irregular structure, with the upper part having the mounting hole of the locking fulcrum 4 and the bolt through hole of the fixing bolt, the middle part having the through hole of the outer rotating half-pin fixing shaft 8, and the lower part having the rotation limiting shaft.

[0009] The limiting rotating disk fixing pin 9 passes through the through hole in the middle of the limiting rotating disk 10, and further passes through the limiting rotating disk mounting boss on the rotating pin mounting block 3 to fix the limiting rotating disk 10 on the rotating pin mounting block 3. The expansion pin passes through the through hole at the far end of the rotating pin mounting block 3 and the limiting rotating disk fixing pin 9 to achieve fixation. The limiting rotating disk fixing cover 11 passes through the outside of the limiting rotating disk fixing pin 9, and the expansion pin passes through the expansion pin through hole of the limiting rotating disk fixing cover 11 and the limiting rotating disk fixing pin 9.

[0010] The spring 12 is fixed to the spring mounting plate 13, and the other end is pressed against the limiting rotating disk 10 and tightened with bolts.

[0011] Furthermore, the rotating pin mounting block 3 is fully welded to the fulcrum mounting plate 1, the rear plane of the rotating pin mounting block 3 is perpendicular to the fulcrum mounting plate 1, and the fulcrum reinforcing plate 2 is welded between the rotating pin mounting block 3 and the fulcrum mounting plate 1, and the connection is made by full welding.

[0012] Furthermore, the rotating pin mounting block 3 is provided with three bosses of different heights, namely the inner rotating pin mounting boss, the outer rotating pin mounting boss, and the limiting rotating disk mounting boss; the boss is a hollow cylindrical structure with a cross groove on the surface and a through hole for expanding the pin on the upper side of the boss.

[0013] Furthermore, the spring plate 13 is welded to the rear side of the mounting boss of the limiting rotary disk, and has two parallel through holes for mounting the spring.

[0014] Furthermore, the locking fulcrum 4 is fixed to the inner rotating half pin with double bolts; the inner rotating half pin fixing shaft 6 passes through the fixing shaft in the middle of the inner rotating half pin 5, and further passes through the inner rotating pin mounting boss on the rotating pin mounting block 3, so that the expansion pin passes through the expansion pin through hole in the upper part of the inner rotating pin mounting boss and the middle part of the inner rotating half pin fixing shaft 6, thus completing the fixing of the inner rotating half pin 5; one section of the inner rotating half pin fixing shaft 6 is a triangular boss, and the other side of the triangular boss is a solid cylinder with an expansion pin fixing through hole in the middle.

[0015] Furthermore, the locking fulcrum 4 is fixed to the outer rotating half pin 7 with double bolts.

[0016] Furthermore, the outer rotating half-pin fixing shaft 8 passes through the fixing shaft in the middle of the outer rotating half-pin 7, and further passes through the outer rotating pin mounting boss on the rotating pin mounting block 3. The expansion pin passes through the expansion pin through hole in the upper part of the inner rotating pin mounting boss and the middle part of the outer rotating half-pin fixing shaft 8, thus completing the fixing of the outer rotating half-pin. One section of the outer rotating half-pin fixing shaft 8 is a triangular boss, and the other side of the triangular boss is a solid cylinder with an expansion pin fixing through hole in the middle.

[0017] Furthermore, the limiting rotating disk 10 has a through hole for the rotating shaft in the middle, and irregularly shaped elongated holes are provided in the upper left and lower right corners, respectively. The rotating limiting shafts of the inner rotating half pin 5 and the outer rotating half pin 7 are respectively passed through the irregularly shaped elongated holes to achieve the purpose of limiting the position of the inner rotating half pin 5 and the outer rotating half pin 7 and their joint movement.

[0018] Furthermore, the main body of the limiting rotary disk fixing pin 9 is a cylindrical structure with a triangular boss at one end and two expansion pin through holes in the middle; the limiting rotary disk fixing cover 11 is a cylindrical structure with a cross groove on the inner side and an expansion pin through hole at the upper end.

[0019] A method for processing a skid fulcrum for applying a primer coating includes the following steps:

[0020] A. Material cutting: Laser cutting equipment is used for material cutting. Both steel plates and cylindrical bars are cut using laser cutting.

[0021] B. Welding: Weld the cut plates and bars together. The welding method is argon arc welding, and the weld joint is fully welded.

[0022] C. Heat Treatment: The welded assembly is placed in a heat treatment furnace. All parts are suspended in the air using specialized hangers. An electric furnace is used for heat treatment, heating all parts from room temperature to 500-550℃, with a temperature increase not exceeding 100℃ per hour. After heating, the parts are held at this temperature for 8 hours, then heating is stopped, and the parts are left in the furnace to cool to room temperature. Heat Treatment: The spring is placed in a heat treatment furnace. All parts are suspended in the air using specialized hangers. An electric furnace is used for heat treatment, heating all parts from room temperature to 850-890℃, with a temperature increase not exceeding 100℃ per hour. After heating, the parts are quenched using oil cooling. After quenching, the parts are tempered at 450-510℃, held for 8 hours, and then allowed to cool naturally to room temperature.

[0023] D. Correction: Correct the welded parts. The correction method is as follows: use an oxyacetylene flame to heat the deformed part. After the protrusion gradually recovers from the deformation, extinguish the oxyacetylene flame and immediately spray water to cool the heated part. Repeat this process 4 times.

[0024] E. Machining: The parts are machined on a CNC lathe;

[0025] F. Heat treatment: The mounting surface and mating surface of the component are heat treated. The heat treatment method is as follows: the workpiece is heated to 840℃ using an electric furnace. After the heating is completed, it is taken out and quenched with water. After quenching, it is tempered at 600℃ for 30 minutes. After the holding time is up, it is allowed to cool naturally. The surface hardness of the heat-treated workpiece shall reach at least HRC45.

[0026] G. Surface cleaning: Clean and wipe with a metal parts cleaner;

[0027] H. Assembly: Assemble according to the assembly diagram.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] 1. The primer skid fulcrum of the present invention can achieve a self-locking function: when the positioning hole (steel plate with holes) of the vehicle body passes through the inner and outer sets of positioning pins, the inner and outer rotating pins will pass through the hole under the action of gravity, and deflect to both sides after passing through the hole to achieve self-locking. This structure can be extended to other devices that need to be locked, with a wide range of applications and good compatibility.

[0030] 2. The processed parts undergo heat treatment and machining before entering the assembly process. Each component has high precision, complete internal stress release, good consistency of finished products, and flexible interchangeability of each component.

[0031] 3. All mating surfaces of the components have undergone heat treatment, which has improved their hardness and wear resistance. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 A three-dimensional structural schematic diagram of the skid fulcrum for coating primer according to the present invention.

[0034] In the diagram: 1. Pivot mounting plate 2. Pivot reinforcement plate 3. Rotary pin mounting block 4. Locking fulcrum 5. Inner rotating half pin 6. Inner rotating half pin fixing shaft 7. Outer rotating half pin 8. Outer rotating half pin fixing shaft 9. Limiting rotating disk fixing pin 10. Limiting rotating disk 11. Limiting rotating disk fixing cover 12. Pulley spring 13. Pulley spring mounting plate. Detailed Implementation

[0035] The present invention will be further described below with reference to embodiments:

[0036] like Figure 1 As shown, the primer coating skid fulcrum of the present invention includes a fulcrum mounting block, an inner rotating half-pin, an outer rotating half-pin, a limiting rotating disk, and an elastic sheet.

[0037] The fulcrum mounting block is composed of a fulcrum mounting plate 1, a fulcrum reinforcing plate 2, a rotating pin mounting block 3, and a spring plate 13. The rotating pin mounting block 3 is fully welded to the fulcrum mounting plate 1, and the rear plane of the rotating pin mounting block 3 is perpendicular to the fulcrum mounting plate 1. The fulcrum reinforcing plate 2 is welded between the rotating pin mounting block 3 and the fulcrum mounting plate 1, and the connection is made by full welding.

[0038] The rotating pin mounting block 3 has three bosses of different heights: an inner rotating pin mounting boss, an outer rotating pin mounting boss, and a limiting rotating disk mounting boss. Each boss is a hollow cylindrical structure with a cross-shaped groove on its surface and a through hole for the expansion pin on its upper side.

[0039] The spring plate 13 is welded to the rear side of the mounting boss of the limiting rotary disk, and has two parallel through holes for mounting the spring.

[0040] The inner rotating half-pin consists of a locking fulcrum 4 and an inner rotating half-pin 5. The locking fulcrum 4 has a lower semi-cylinder, a middle semi-cylinder with a cut frustum, and an upper semi-conical structure. The lower part has two threaded holes for mounting the locking fulcrum 4 onto the inner rotating half-pin 5. The frustum is cut between the upper surface of the lower semi-cylinder and the upper semi-conical structure, serving as the locking fulcrum hole surface. The inner rotating half-pin 5 has an irregular structure: the upper part has the mounting hole for the locking fulcrum 4 and the bolt through hole for the fixing bolt; the middle part has the through hole for the inner rotating half-pin fixing shaft 6; and the lower part has a rotation limiting shaft.

[0041] Specifically, the locking fulcrum 4 and the inner rotating half pin 5 are assembled together and fixed together with double bolts.

[0042] Specifically, the inner rotating half-pin fixing shaft 6 passes through the fixing shaft in the middle of the inner rotating half-pin 5, and further passes through the inner rotating pin mounting boss on the rotating pin mounting block 3. The expansion pin passes through the expansion pin through hole in the upper part of the inner rotating pin mounting boss and the middle part of the inner rotating half-pin fixing shaft 6, thus completing the fixing of the inner rotating half-pin 5. One section of the inner rotating half-pin fixing shaft 6 is a triangular boss, and the other side of the triangular boss is a solid cylinder with an expansion pin fixing through hole in the middle.

[0043] The outer rotating half-pin portion consists of a locking fulcrum 4 and an outer rotating half-pin 7. The outer rotating half-pin 7 has an irregular structure, with a mounting hole for the locking fulcrum 4 and a bolt through hole for the fixing bolt at the upper part, a through hole for the outer rotating half-pin fixing shaft 8 in the middle part, and a rotation limiting shaft at the lower part.

[0044] Specifically, the locking fulcrum 4 and the outer rotating half pin 7 are assembled together and fixed together with double bolts.

[0045] Specifically, the outer rotating half-pin fixing shaft 8 passes through the fixing shaft in the middle of the outer rotating half-pin 7, and further passes through the outer rotating pin mounting boss on the rotating pin mounting block 3. The expansion pin passes through the expansion pin through hole in the upper part of the inner rotating pin mounting boss and the middle of the outer rotating half-pin fixing shaft 8, thus completing the fixing of the outer rotating half-pin. One section of the outer rotating half-pin fixing shaft 8 is a triangular boss, and the other side of the triangular boss is a solid cylinder with an expansion pin fixing through hole in the middle.

[0046] Specifically, the limiting rotating disk fixing pin 9 passes through the through hole in the middle of the limiting rotating disk 10, and further through the limiting rotating disk mounting boss on the rotating pin mounting block 3, fixing the limiting rotating disk 10 onto the rotating pin mounting block 3. The expansion pin passes through the through holes at the far ends of the rotating pin mounting block 3 and the limiting rotating disk fixing pin 9 to achieve fixation. The limiting rotating disk fixing cover 11 passes through the outside of the limiting rotating disk fixing pin 9, and the expansion pin passes through the expansion pin through holes of the limiting rotating disk fixing cover 11 and the limiting rotating disk fixing pin 9. The limiting rotating disk 10 has a through hole for the rotating shaft in the middle, and irregularly shaped elongated holes in the upper left and lower right corners, respectively. The rotation limiting shafts of the inner rotating half-pin 5 and the outer rotating half-pin 7 pass through these irregularly shaped elongated holes, respectively, to restrict the positions of the inner rotating half-pin 5 and the outer rotating half-pin 7 and to allow them to move together. The limiting rotating disk fixing pin 9 has a cylindrical structure with a triangular boss at one end and two expansion pin through holes in the middle. The limiting rotating disk fixing cover 11 has a cylindrical structure with a cross groove on the inner side and an expansion pin through hole at the upper end.

[0047] Specifically, the spring plate 12 is fixed on the spring plate mounting plate 13, and the other end is pressed against the limiting rotating disk 10 and tightened with bolts to complete the assembly of the fulcrum.

[0048] To achieve: a method for processing a skid fulcrum for applying a primer, the method includes the following steps:

[0049] (1) Blanking: Laser cutting equipment is used for blanking. The cutting of steel plates and cylindrical bars are all done by laser cutting.

[0050] (2) Welding: Weld the cut plates and bars together. The welding method is argon arc welding, and the weld joint is fully welded.

[0051] (3) Heat treatment (non-elastic parts): The welded assembly is sent into the heat treatment furnace. All parts are suspended in the air using a special hanger. The heat treatment is carried out in an electric furnace. All parts are heated from room temperature to 500-550℃, with a temperature increase of no more than 100℃ per hour. After the temperature is raised, the parts are held at the temperature for 8 hours. Then the heating is stopped, and the parts are left in the furnace to cool down to room temperature. Heat treatment (spring plates): The spring plates are sent into the heat treatment furnace. All parts are suspended in the air using a special hanger. The heat treatment is carried out in an electric furnace. All parts are heated from room temperature to 850-890℃, with a temperature increase of no more than 100℃ per hour. After the temperature is raised, the parts are quenched using oil cooling. After quenching, the parts are tempered at a temperature of 450-510℃ and held at the temperature for 8 hours before naturally cooling down to room temperature.

[0052] (4) Correction: Correct the welded parts. The correction method is as follows: use an oxyacetylene flame to heat the deformed part, wait for the deformation to gradually recover, extinguish the oxyacetylene flame, and immediately spray water to cool the heated part. Repeat 4 times.

[0053] (5) Machining: The parts are placed on a CNC lathe for machining;

[0054] (6) Heat treatment: The mounting surface and mating surface of the component are heat treated. The heat treatment method is as follows: the workpiece is heated to 840°C using an electric furnace. After the heating is completed, it is taken out and quenched with water. After quenching, it is tempered at 600°C for 30 minutes. After the holding time is up, it is naturally cooled. The surface hardness of the heat-treated workpiece shall reach at least HRC45.

[0055] (7) Surface cleaning: Clean and wipe with a metal parts cleaner;

[0056] (8) Assembly: Assemble according to the assembly diagram.

[0057] Example 1: A method for processing a skid fulcrum for applying a primer, comprising the following steps:

[0058] 1. Material cutting: Laser cutting equipment is used for material cutting. During the cutting process, all identical parts are cut from the same steel plate or cylindrical steel bar. The outer contour of the laser-cut parts is consistent with the outer contour of the drawing, with an overall deviation of ±0.5mm.

[0059] 2. Welding: First, design the welding fixture. The fixture should ensure that it has multiple sets of precision positioning holes and positioning limit blocks. The welded assembly should be ready for disassembly. After the fixture is completed, weld the following components together: 1- Fixture mounting plate, 2- Support reinforcing plate, 3- Rotary pin mounting block, and 13- Spring plate mounting plate to obtain the welded assembly: Support mounting seat assembly; Assembly 2: Weld the rotating half-pin to the rotating limiting shaft to obtain the following assemblies: 5- Inner rotating half-pin and 7- Outer rotating half-pin assemblies.

[0060] 3. Heat treatment: (1) Non-elastic parts (except 12-spring): The welded assembly is sent into the heat treatment furnace. All parts are suspended in the air using a special hanger. The heat treatment is carried out in an electric furnace. All parts are heated from room temperature to 550±20℃, with a temperature increase of no more than 100℃ per hour. After the temperature is raised, the parts are held for 8 hours. Then the heating is stopped and the furnace door is opened. The workpiece is left in the furnace to cool naturally to room temperature. (2) Spring: The spring is sent into the heat treatment furnace. All parts are suspended in the air using a special hanger. The heat treatment is carried out in an electric furnace. All parts are heated from room temperature to 850-890℃, with a temperature increase of no more than 100℃ per hour. After the temperature is raised, the parts are quenched using oil cooling. After the quenching is completed, the parts are tempered at 450-510℃ and held for 8 hours before cooling naturally to room temperature.

[0061] 4. Machining: The parts are placed on a CNC lathe for machining. The machining scope includes all mounting surfaces, mating holes, mating shafts, etc. The machining accuracy is ±0.5mm overall.

[0062] 5. Tempering treatment: The mounting surfaces and mating surfaces of the components are tempered. The tempering method is as follows: the workpiece is heated to 840℃ using an electric furnace. After heating, it is removed and quenched using water cooling. After quenching, it is tempered at 600℃ for 30 minutes. After the holding time is up, the furnace door is opened and it is allowed to cool naturally. The surface hardness of the tempered workpiece should reach at least HRC45.

[0063] 6. Surface cleaning: Use a metal parts cleaner to clean and wipe the surface of the workpiece;

[0064] 7. Assembly: Assemble according to the assembly diagram.

[0065] This invention relates to a pivot-mounted primer skid, which comprises a pivot mounting block, an inner rotating half-pin, an outer rotating half-pin, a limiting rotating disk, and an elastic sheet. All moving parts maintain linkage and can achieve a certain degree of self-locking without external assistance. In this invention, the locking mechanism is fixed at two points: the inner rotating half-pin and the outer rotating half-pin, which together position and lock the hole. In this invention, the processed parts undergo heat treatment, machining, and assembly, resulting in high precision of each component, complete internal stress release, good finished product consistency, and flexible interchangeability of components. All mating surfaces of the components undergo heat treatment, improving hardness and wear resistance.

[0066] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A primer coating skid fulcrum, characterized in that: It includes a fulcrum mounting block, an inner rotating half-pin, and an outer rotating half-pin; The fulcrum mounting block is composed of a fulcrum mounting plate (1), a fulcrum reinforcing plate (2), a rotating pin mounting block (3), and a spring mounting plate (13); the rotating pin mounting block (3) is connected to the fulcrum mounting plate (1), and the fulcrum reinforcing plate (2) is connected between the rotating pin mounting block (3) and the fulcrum mounting plate (1); the spring mounting plate (13) is connected to the rear side of the limiting rotating disk mounting boss. The inner rotating half-pin part consists of a locking fulcrum (4) and an inner rotating half-pin (5); the locking fulcrum (4) is a lower semi-cylinder, a middle semi-cylinder with a cut frustum, and an upper semi-conical structure. The lower part is provided with two threaded holes for installing the locking fulcrum (4) on the inner rotating half-pin (5). The upper surface of the lower semi-cylinder is cut with a frustum between the upper surface and the upper semi-conical structure; the inner rotating half-pin (5) is an irregular structure. The upper part is provided with the mounting hole of the locking fulcrum (4) and the bolt through hole of the fixing bolt. The middle part is provided with the through hole of the inner rotating half-pin fixing shaft (6). The lower part is provided with the rotation limiting shaft. The outer rotating half-pin part is composed of a locking fulcrum (4) and an outer rotating half-pin (7); the outer rotating half-pin (7) is an irregular structure, with the upper part having the mounting hole of the locking fulcrum (4) and the bolt through hole of the fixing bolt, the middle part having the through hole of the outer rotating half-pin fixing shaft (8), and the lower part having the rotation limiting shaft. The limiting rotating disk fixing pin (9) passes through the through hole in the middle of the limiting rotating disk (10), and further passes through the limiting rotating disk mounting boss on the rotating pin mounting block (3) to fix the limiting rotating disk (10) on the rotating pin mounting block (3). The expansion pin passes through the through hole at the far end of the rotating pin mounting block (3) and the limiting rotating disk fixing pin (9) to achieve fixation. The limiting rotating disk fixing cover (11) passes through the outside of the limiting rotating disk fixing pin (9), and the expansion pin passes through the expansion pin through hole of the limiting rotating disk fixing cover (11) and the limiting rotating disk fixing pin (9). The spring (12) is fixed to the spring mounting plate (13), and the other end is pressed against the limiting rotating disk (10) and fastened with bolts; The limiting rotating disk (10) has a through hole for the rotating shaft in the middle, and irregular elongated holes are provided on the upper left and lower right respectively. The rotating limiting shafts of the inner rotating half pin (5) and the outer rotating half pin (7) are respectively passed through the irregular elongated holes to achieve the purpose of limiting the position of the inner rotating half pin (5) and the outer rotating half pin (7) and their joint movement.

2. The primer coating skid fulcrum according to claim 1, characterized in that: The rotating pin mounting block (3) is fully welded to the fulcrum mounting plate (1). The rear plane of the rotating pin mounting block (3) is perpendicular to the fulcrum mounting plate (1). The fulcrum reinforcing plate (2) is welded between the rotating pin mounting block (3) and the fulcrum mounting plate (1) and fully welded for connection.

3. The primer coating skid fulcrum according to claim 1, characterized in that: The rotating pin mounting block (3) is provided with three bosses of different heights, namely the inner rotating pin mounting boss, the outer rotating pin mounting boss and the limiting rotating disk mounting boss; the boss is a hollow cylindrical structure with a cross groove on the surface and a through hole for the expansion pin on the upper side of the boss.

4. The primer coating skid fulcrum according to claim 1, characterized in that: The spring plate (13) is welded to the rear side of the mounting boss of the limiting rotary disk, and has two parallel through holes for mounting the spring.

5. The primer coating skid fulcrum according to claim 1, characterized in that: The locking fulcrum (4) is fixed to the inner rotating half pin with double bolts; the inner rotating half pin fixing shaft (6) passes through the fixing shaft in the middle of the inner rotating half pin (5), and further passes through the inner rotating pin mounting boss on the rotating pin mounting block (3), and the expansion pin passes through the expansion pin through hole in the upper part of the inner rotating pin mounting boss and the middle part of the inner rotating half pin fixing shaft (6) to complete the fixing of the inner rotating half pin (5); one section of the inner rotating half pin fixing shaft (6) is a triangular boss, the other side of the triangular boss is a solid cylinder, and the expansion pin fixing through hole is set in the middle.

6. The primer skid fulcrum according to claim 1, characterized in that: The locking fulcrum (4) is fixed to the outer rotating half pin (7) with double bolts.

7. The primer skid fulcrum according to claim 1, characterized in that: The outer rotating half-pin fixing shaft (8) passes through the fixing shaft in the middle of the outer rotating half-pin (7), and further passes through the outer rotating pin mounting boss on the rotating pin mounting block (3). The expansion pin passes through the expansion pin through hole in the upper part of the inner rotating pin mounting boss and the middle part of the outer rotating half-pin fixing shaft (8) to complete the fixing of the outer rotating half-pin. One section of the outer rotating half-pin fixing shaft (8) is a triangular boss, and the other side of the triangular boss is a solid cylinder with an expansion pin fixing through hole in the middle.

8. The primer skid fulcrum according to claim 1, characterized in that: The main body of the limiting rotary disk fixing pin (9) is a cylindrical structure with a triangular boss at one end and two expansion pin through holes in the middle; the limiting rotary disk fixing cover (11) is a cylindrical structure with a cross groove on the inner side and an expansion pin through hole at the upper end.

9. The processing method of the primer skid fulcrum according to claim 1, characterized in that, Includes the following steps: A. Material cutting: Laser cutting equipment is used for material cutting. Both steel plates and cylindrical bars are cut using laser cutting. B. Welding: Weld the cut plates and bars together. The welding method is argon arc welding, and the weld joint is fully welded. C. Heat treatment of non-elastic components: The welded assembly is placed in a heat treatment furnace. All parts are suspended in the air using specialized hangers. The heat treatment is performed in an electric furnace, heating all parts from room temperature to 500-550℃, with a temperature increase not exceeding 100℃ per hour. After heating, the parts are held at this temperature for 8 hours, then heating is stopped, and the parts are left in the furnace to cool to room temperature. Heat treatment of spring plates: The spring plates are placed in a heat treatment furnace. All parts are suspended in the air using specialized hangers. The heat treatment is performed in an electric furnace, heating all parts from room temperature to 850-890℃, with a temperature increase not exceeding 100℃ per hour. After heating, the parts are quenched using oil cooling. After quenching, the parts are tempered at 450-510℃, held for 8 hours, and then allowed to cool naturally to room temperature. D. Correction: Correct the welded parts. The correction method is as follows: use an oxyacetylene flame to heat the deformed part. After the deformation gradually recovers, extinguish the oxyacetylene flame and immediately spray water to cool the heated part. Repeat this process 4 times. E. Machining: The parts are machined on a CNC lathe; F. Heat treatment: The mounting surface and mating surface of the component are heat treated. The heat treatment method is as follows: the workpiece is heated to 840℃ using an electric furnace. After the heating is completed, it is taken out and quenched with water. After quenching, it is tempered at 600℃ for 30 minutes and then cooled naturally. The surface hardness of the tempered workpiece must reach at least HRC45; G. Surface cleaning: Clean and wipe with a metal parts cleaner; H. Assembly: Assemble according to the assembly diagram.

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