Positioning and clamping method for movable arm of excavator

Abstract

The invention relates to the technical field of excavator part machining, in particular to a positioning and clamping method for an excavator movable arm. Based on a positioning and clamping tool, the positioning and clamping tool comprises a rack; the large-end abutting mechanism is connected to the rack and used for abutting against and positioning the end portion of a large-end arm of the excavator movable arm body; the large-end supporting mechanism is connected to the rack, is located on the X-direction side of the large-end abutting mechanism and comprises a first fixed-height supporting seat and a first adjustable-height supporting seat which are distributed in the Y direction; the large-end pre-centering mechanism is connected to the rack, is located on the X-direction side of the large-end supporting mechanism, comprises a first centering clamping arm and a second centering clamping arm which are symmetrically arranged, and is used for side pre-centering of a large-end arm of the excavator movable arm body; according to the structure combination method, the excavator movable arms of different specifications and models can be accurately positioned and clamped.

Description

Technical Field

[0001] This invention relates to the field of excavator component processing technology, specifically to a method for positioning and clamping an excavator boom. Background Technology

[0002] The excavator boom is a crucial component of an excavator. After the excavator boom frame is manufactured, it needs to be clamped onto a clamping fixture to facilitate the assembly of various components on the excavator boom frame using a large CNC machine tool. Chinese Patent CN117817593A discloses an excavator boom centering clamping fixture and centering clamping method. Its structure can perform multi-directional centering and positioning clamping of a single model of excavator boom. However, it is difficult to apply to the positioning and clamping of excavator booms of different models and specifications. Furthermore, its two end support positions are fixed, while the bottom of the two ends of the excavator boom has flatness errors. If fixed supports are used, the excavator boom is prone to slight tilting during the clamping process, thus affecting the clamping accuracy. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to improve the positioning and clamping method of excavator boom, which can be applied to the positioning and clamping of excavator booms of different models and specifications, and can further improve the clamping accuracy.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: The positioning and clamping method for excavating boom is based on the excavating boom body, which is L-shaped and includes an L-shaped arm composed of a large end arm and a small end arm. Based on the positioning and clamping fixture, the positioning and clamping fixture includes: frame; The large end support mechanism is connected to the frame and is used to support and position the end of the large end arm of the excavator boom body. The large-end support mechanism is connected to the frame and located on the X-direction side of the large-end top abutment mechanism, including a first fixed-height support seat and a first adjustable-height support seat distributed along the Y-direction; The large-end pre-alignment mechanism is connected to the frame and located on the X-direction side of the large-end support mechanism. It includes a first alignment clamp arm and a second alignment clamp arm that are symmetrically arranged and are used for the side pre-alignment of the large-end arm of the excavator boom body. The first side top mechanism is connected to the frame and located on the X-direction side of the large end pre-centering mechanism. It includes a first side top clamping arm and a second side top clamping arm that are symmetrically arranged and used for positioning and clamping the large end arm of the excavator boom body. The first X-axis guide rail is connected to the frame and is located on the X-axis side of the first side top mechanism; The second top-mounting mechanism is slidably connected to the first X-guide rail via the first slide block. The second side-mounting mechanism includes a third side-mounting clamping arm and a fourth side-mounting clamping arm arranged symmetrically for positioning and clamping the side of the middle section of the excavator boom body; and a first laser rangefinder and a second laser rangefinder arranged symmetrically. The second X-axis guide rail is connected to the frame and is located on the X-axis side of the first X-axis guide rail; The second slide block is slidably connected to the second X-guide rail; The third side top mechanism is connected to the second slide block. The third side top mechanism includes a fifth side top clamping arm and a sixth side top clamping arm that are symmetrically arranged, which are used for positioning and clamping the side of the small end arm of the excavator boom body. The small-end pre-centering mechanism is connected to the second slide and located on the X-direction side of the third side top mechanism. It includes a symmetrically arranged third centering clamping arm and a fourth centering clamping arm, which are used for the side pre-centering of the small-end arm of the excavator boom body. The small end support mechanism is connected to the second slide and is located on the X-direction side of the small end centering mechanism. It includes a second adjustable height support seat and a second fixed height support seat distributed along the Y-direction. The third X-axis guide rail is connected to the second slide and is located on the X-axis side of the small end support mechanism; The third slide block is slidably connected to the third X-axis guide rail; The small end pushing mechanism is connected to the third slide and is used to push against and position the end of the small end arm of the excavator boom body; The positioning and clamping method includes the following steps: S1: Adjust the positions of the first slide, the second slide, and the third slide according to the model and specifications of the excavator boom body; adjust the height of the first adjustable height support to make it lower than the height of the first fixed height support; adjust the height of the second adjustable height support to make it lower than the height of the second fixed height support. S2: Hoist the excavator boom body to the positioning and clamping fixture, so that the X-direction opposite end of the large end boom abuts against the large end support mechanism, the lower part of the large end boom is supported on the first fixed height support seat, and the lower part of the small end boom is supported on the second fixed height support seat. S3: Control the third slide block to move away from the X direction, so that the small end pushing mechanism pushes the X end of the small end arm, and positions the excavator boom body in the X direction. S4: Control the first and second centering clamping arms of the large-end pre-centering mechanism to pre-center the side of the large-end arm, and control the third and fourth centering clamping arms of the small-end pre-centering mechanism to pre-center the side of the small-end arm. S5: Control the first laser ranging sensor and the second laser ranging sensor to perform laser ranging on both sides of the middle part of the excavator boom body. Adjust the position of the third side top clamp arm and the fourth side top clamp arm according to the ranging result. When the difference between the distance between the two sides detected by the first laser ranging sensor and the second laser ranging sensor is less than 1mm, stop adjusting the third side top clamp arm and the fourth side top clamp arm. S6: Control the first side top clamping arm, the second side top clamping arm, the fifth side top clamping arm and the sixth side top clamping arm to position and clamp the excavator boom respectively; S7: Adjust the first adjustable height support to support the bottom of the large end of the excavator boom body, and adjust the second adjustable height support to support the bottom of the small end of the excavator boom body.

[0005] Furthermore, in the above-mentioned positioning and clamping method for the excavator boom, the first adjustable height support includes a lifting cylinder and a support body connected to the upper end of the lifting cylinder. The piston rod of the lifting cylinder is provided with a limiting inclined surface on its side, and a side limiting cylinder is provided on the side of the lifting cylinder. The end of the piston rod of the side limiting cylinder is directly opposite the limiting inclined surface. In S7, adjusting the first adjustable height support seat to support it at the bottom of the large end of the excavator boom body specifically involves: controlling the lifting cylinder to drive the support seat body to support the bottom of the large end of the excavator boom body, and controlling the side limit cylinder to press and lock it against the limit slope.

[0006] Furthermore, in the above-mentioned positioning and clamping method for the excavator boom, the first side top clamping arm is connected to a first height adjustment mechanism, and the second side top clamping arm is connected to a second height adjustment mechanism. S1 also includes a first height adjustment mechanism and a second height adjustment mechanism that adjust according to the model and specifications of the excavator boom body.

[0007] Furthermore, in the above-mentioned positioning and clamping method for the excavator boom, the third side top clamping arm is connected to a third height adjustment mechanism, and the fourth side top clamping arm is connected to a fourth height adjustment mechanism. S1 also includes a third height adjustment mechanism and a fourth height adjustment mechanism that adjust according to the model and specifications of the excavator boom body.

[0008] Furthermore, in the above-mentioned positioning and clamping method for the excavator boom, the fifth side top clamping arm is connected to a fifth height adjustment mechanism, and the sixth side top clamping arm is connected to a sixth height adjustment mechanism. S1 also includes a fifth height adjustment mechanism and a sixth height adjustment mechanism that are adjusted according to the model and specifications of the excavator boom body.

[0009] Furthermore, in the above-mentioned positioning and clamping method for the excavator boom, the large end abutment mechanism includes a connecting frame, an abutment baffle connected to the connecting frame, a pressing swing arm pivotally connected to the connecting frame, and a drive cylinder connected between the connecting frame and the pressing swing arm; the cylinder body of the drive cylinder is pivotally connected to the connecting frame, and the piston rod end of the drive cylinder is pivotally connected to the pressing swing arm. S7 also includes a control drive cylinder that drives the pressure arm to swing downwards and press against the upper part of the large end of the excavator boom body.

[0010] Furthermore, in the above-mentioned positioning and clamping method for the excavator boom, the large-end support mechanism also includes a Y-guide rail, and the first adjustable height support seat and the first fixed height support seat are slidably connected to the Y-guide rail. S1 also includes adjusting the distance between the first adjustable height support and the first fixed height support according to the model and specifications of the excavator boom body.

[0011] The beneficial effects of this invention are as follows: it enables precise positioning and clamping of excavator booms of different specifications and models. In particular, the support structure features a first adjustable height support seat and a second adjustable height support seat arranged diagonally opposite each other. During the hoisting and pre-alignment of the excavator boom body, as well as the position adjustment through laser sensor ranging, the first and second adjustable height support seats do not provide support. This facilitates the adjustment of the lateral sway position of the excavator boom body. After adjustment and lateral clamping, the first and second adjustable height support seats are then used to lift the boom body to the lower part of the excavator boom body, forming a four-point stable support, thereby further improving the clamping accuracy and stability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the positioning and clamping fixture in an unloaded state according to a specific embodiment of the present invention; Figure 2 This is a structural schematic diagram of the positioning and clamping fixture clamping the excavator boom body in a specific embodiment of the present invention; Figure 3 This is a top view of the positioning and clamping fixture in an unloaded state according to a specific embodiment of the present invention; Figure 4 This is a cross-sectional view of the internal structure of the first adjustable height support seat according to a specific embodiment of the present invention; Label Explanation: 1. Excavator boom body; 11. Large end boom; 12. Small end boom; 2. Positioning and clamping fixture; 21. Frame; 22. Large end support mechanism; 221. Connecting frame; 222. Support baffle; 223. Pressing swing arm; 224. Drive cylinder; 23. Large end support mechanism; 231. First fixed height support seat; 232. First adjustable height support seat; 2321. Lifting cylinder; 23211. Limiting inclined surface; 2322. Support seat body; 2323. Side limiting cylinder; 233. Y-guide rail; 24. Large end pre-centering mechanism; 241. First centering clamping arm; 242. Second centering clamping arm; 25. First side lifting mechanism; 251. First side lifting clamping arm; 2511. First height adjustment mechanism; 252. Second side lifting clamping arm; 2521. Second height adjustment mechanism; 26. First X-guide rail; 27. Second side lifting mechanism; 271. Third side... Top clamping arm; 2711, Third height adjustment mechanism; 272, Fourth side top clamping arm; 2721, Fourth height adjustment mechanism; 273, First laser rangefinder; 274, Second laser rangefinder; 28, First slide; 29, Second X-axis guide rail; 210, Second slide; 211, Third side top mechanism; 2111, Fifth side top clamping arm; 21111, Fifth height adjustment mechanism; 2112, Sixth side top clamping arm; 21121, Sixth height adjustment mechanism; 212, Small end pre-centering mechanism; 2121, Third centering clamping arm; 2122, Fourth centering clamping arm; 213, Small end support mechanism; 2131, Second adjustable height support seat; 2132, Second fixed height support seat; 214, Third X-axis guide rail; 215, Third slide; 216, Small end pushing mechanism. Detailed Implementation

[0013] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0014] Please refer to Figures 1 to 4 The specific embodiments of the present invention relate to a positioning and clamping method for an excavator boom, based on an excavator boom body 1, wherein the excavator boom body 1 is L-shaped and includes an L-shaped arm composed of a large end arm 11 and a small end arm 12. Based on the positioning and clamping fixture 2, the positioning and clamping fixture 2 includes: Rack 21; The large end support mechanism 22 is connected to the frame 21 and is used to support and position the end of the large end arm 11 of the excavator boom body 1. The large end support mechanism 23 is connected to the frame 21 and is located on the X-direction side of the large end top abutment mechanism 22. It includes a first fixed height support seat 231 and a first adjustable height support seat 232 distributed along the Y-direction. The large-end pre-centering mechanism 24 is connected to the frame 21 and located on the X-direction side of the large-end support mechanism 23. It includes a first centering clamping arm 241 and a second centering clamping arm 242 arranged symmetrically, and is used for the side pre-centering of the large-end arm 11 of the excavating boom body 1. The first side top mechanism 25 is connected to the frame 21 and is located on the X-direction side of the large end pre-centering mechanism 24. It includes a first side top clamping arm 251 and a second side top clamping arm 252 that are symmetrically arranged, and is used for positioning and clamping the large end arm 11 of the excavator boom body 1. The first X-axis guide rail 26 is connected to the frame 21 and is located on the X-axis side of the first side top mechanism 25; The second top-feeding mechanism is slidably connected to the first X-guide rail 26 via the first slide block 28. The second side-feeding mechanism 27 includes a third side-feeding clamping arm 271 and a fourth side-feeding clamping arm 272 symmetrically arranged for positioning and clamping the side of the middle section of the excavating boom body 1; and a first laser rangefinder 273 and a second laser rangefinder 274 symmetrically arranged. The second X-axis guide rail 29 is connected to the frame 21 and is located on the X-direction side of the first X-axis guide rail 26; The second slide block 210 is slidably connected to the second X-guide rail 29; The third side top mechanism 211 is connected to the second slide block 210. The third side top mechanism 211 includes a fifth side top clamping arm 2111 and a sixth side top clamping arm 2112 arranged symmetrically, which are used for positioning and clamping the side of the small end arm 12 of the excavator boom body 1. The small end pre-centering mechanism 212 is connected to the second slide 210 and is located on the X-direction side of the third side top mechanism 211. It includes a third centering clamping arm 2121 and a fourth centering clamping arm 2122 that are symmetrically arranged, and is used for the side pre-centering of the small end arm 12 of the excavator boom body 1. The small end support mechanism 213 is connected to the second slide 210 and is located on the X-direction side of the small end centering mechanism. It includes a second adjustable height support 2131 and a second fixed height support 2132 distributed along the Y-direction. The third X-axis guide rail 214 is connected to the second slide block 210 and is located on the X-axis side of the small end support mechanism 213; The third slide block 215 is slidably connected to the third X-guide rail 214; The small end pushing mechanism 216 is connected to the third slide 215 and is used to push against the end of the small end arm 12 of the excavator boom body 1. The positioning and clamping method includes the following steps: S1: Adjust the positions of the first slide block 28, the second slide block 210 and the third slide block 215 according to the model and specifications of the excavator boom body 1; adjust the height of the first adjustable height support 232 so that its height is lower than the height of the first fixed height support 231; adjust the height of the second adjustable height support 2131 so that its height is lower than the height of the second fixed height support 2132. S2: Hoist the excavator boom body 1 to the positioning and clamping fixture 2, so that the X-direction-averse end of the large end boom 11 abuts against the large end support mechanism 22, the lower part of the large end boom 11 is supported on the first fixed height support seat 231, and the lower part of the small end boom 12 is supported on the second fixed height support seat 2132. S3: Control the third slide block 215 to move away from the X direction, so that the small end pushing mechanism 216 pushes the X end of the small end arm 12, so that the excavator boom body 1 is positioned in the X direction. S4: Control the first centering clamping arm 241 and the second centering clamping arm 242 of the large end pre-centering mechanism 24 to pre-center the side of the large end arm 11, and control the third centering clamping arm 2121 and the fourth centering clamping arm 2122 of the small end pre-centering mechanism 212 to pre-center the side of the small end arm 12. S5: Control the first laser ranging sensor 273 and the second laser ranging sensor 274 to perform laser ranging on both sides of the middle part of the excavator boom body 1. Adjust the position of the third side top clamping arm 271 and the fourth side top clamping arm 272 according to the ranging result. When the difference between the distance between the two sides detected by the first laser ranging sensor 273 and the second laser ranging sensor 274 is less than 1mm, stop adjusting the third side top clamping arm 271 and the fourth side top clamping arm 272. S6: Control the first side top clamping arm 251, the second side top clamping arm 252, the fifth side top clamping arm 2111 and the sixth side top clamping arm 2112 to position and clamp the excavator boom respectively; S7: Adjust the first adjustable height support 232 so that it supports the bottom of the large end of the excavator boom body 1, and adjust the second adjustable height support 2131 so that it supports the bottom of the small end of the excavator boom body 1.

[0015] In a preferred embodiment, the first adjustable height support 232 includes a lifting cylinder 2321 and a support body 2322 connected to the upper end of the lifting cylinder 2321. The piston rod of the lifting cylinder 2321 is provided with a limiting inclined surface 23211 on its side, and a side limiting cylinder 2323 is provided on the side of the lifting cylinder 2321. The end of the piston rod of the side limiting cylinder 2323 is directly opposite to the limiting inclined surface 23211. In S7, adjusting the first adjustable height support 232 to support the bottom of the large end of the excavator boom body 1 specifically involves controlling the lifting cylinder 2321 to drive the support body 2322 to support the bottom of the large end of the excavator boom body 1, and controlling the side limiting cylinder 2323 to press and lock against the limiting inclined surface 23211.

[0016] In a preferred embodiment, the first side top clamping arm 251 is connected to a first height adjustment mechanism 2511, and the second side top clamping arm 252 is connected to a second height adjustment mechanism 2521; S1 also includes a first height adjustment mechanism 2511 and a second height adjustment mechanism 2521 that adjust according to the model and specifications of the excavator boom body 1.

[0017] In the above embodiments, the first height adjustment mechanism 2511 and the second height adjustment mechanism 2521 can be vertical screw guide rail mechanisms, and the first side top clamping arm 251 and the second side top clamping arm 252 can be clamping arms connected by a side top oil cylinder, which is connected to the slide of the screw guide rail mechanism.

[0018] In a preferred embodiment, the third side top clamping arm 271 is connected to a third height adjustment mechanism 2711, and the fourth side top clamping arm 272 is connected to a fourth height adjustment mechanism 2721. S1 also includes a third height adjustment mechanism 2711 and a fourth height adjustment mechanism 2721 that adjust according to the model and specifications of the excavator boom body 1.

[0019] In the above embodiments, the third height adjustment mechanism 2711 and the fourth height adjustment mechanism 2721 can be vertical screw guide rail mechanisms, and the third side top clamping arm 271 and the fourth side top clamping arm 272 can be clamping arms connected by side top oil cylinders, with the side top oil cylinders connected to the slide of the screw guide rail mechanism.

[0020] In a preferred embodiment, the fifth side top clamping arm 2111 is connected to a fifth height adjustment mechanism 21111, and the sixth side top clamping arm 2112 is connected to a sixth height adjustment mechanism 21121; S1 also includes a fifth height adjustment mechanism 21111 and a sixth height adjustment mechanism 21121 that adjust according to the model and specifications of the excavator boom body 1.

[0021] In the above embodiments, the fifth height adjustment mechanism 21111 and the sixth height adjustment mechanism 21121 can be vertical screw guide rail mechanisms, and the fifth side top clamping arm 2111 and the sixth side top clamping arm 2112 can be clamping arms connected by side top oil cylinders, with the side top oil cylinders connected to the slide of the screw guide rail mechanism.

[0022] In a preferred embodiment, the large end abutting mechanism 22 includes a connecting frame 221, an abutting baffle 222 connected to the connecting frame 221, a pressing swing arm 223 pivotally connected to the connecting frame 221, and a drive cylinder 224 connected between the connecting frame 221 and the pressing swing arm 223; the cylinder body of the drive cylinder 224 is pivotally connected to the connecting frame 221, and the piston rod end of the drive cylinder 224 is pivotally connected to the pressing swing arm 223; S7 also includes controlling the drive cylinder 224 to drive the pressing arm 223 to swing downwards and press against the upper part of the large end of the excavator boom body 1.

[0023] In a preferred embodiment, the large-end support mechanism 23 further includes a Y-guide rail 233, and the first adjustable height support seat 232 and the first fixed height support seat 231 are slidably connected to the Y-guide rail 233. S1 also includes adjusting the distance between the first adjustable height support 232 and the first fixed height support 231 according to the model and specifications of the excavator boom body 1.

[0024] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A positioning and clamping method of a excavator arm, based on a excavator arm body, the excavator arm body is shaped as an L shape, the excavator arm body comprises an L-shaped arm composed of a large end arm and a small end arm; characterized in that based on a positioning and clamping tool, the positioning and clamping tool comprises: a frame; a large end abutting mechanism connected to the frame, used for abutting and positioning an end of the large end arm of the excavator arm body; a large end supporting mechanism connected to the frame, located on the X direction side of the large end abutting mechanism, comprising a first fixed height supporting seat and a first adjustable height supporting seat distributed along the Y direction; a large end pre-centering mechanism connected to the frame, located on the X direction side of the large end supporting mechanism, comprising a first centering clamp arm and a second centering clamp arm symmetrically arranged, used for pre-centering the side of the large end arm of the excavator arm body; a first side abutting mechanism connected to the frame, located on the X direction side of the large end pre-centering mechanism, comprising a first side abutting clamp arm and a second side abutting clamp arm symmetrically arranged, used for positioning and clamping the large end arm of the excavator arm body; a first X direction guide rail connected to the frame, located on the X direction side of the first side abutting mechanism; a second abutting mechanism slidably connected to the first X direction guide rail through a first sliding seat, the second side abutting mechanism comprises a third side abutting clamp arm and a fourth side abutting clamp arm symmetrically arranged, used for positioning and clamping the side of the middle segment of the excavator arm body; and a first laser ranging sensor and a second laser ranging sensor symmetrically arranged; a second X direction guide rail connected to the frame, located on the X direction side of the first X direction guide rail; a second sliding seat slidably connected to the second X direction guide rail; a third side abutting mechanism connected to the second sliding seat, the third side abutting mechanism comprises a fifth side abutting clamp arm and a sixth side abutting clamp arm symmetrically arranged, used for positioning and clamping the side of the small end arm of the excavator arm body; a small end pre-centering mechanism connected to the second sliding seat, located on the X direction side of the third side abutting mechanism, comprising a third centering clamp arm and a fourth centering clamp arm symmetrically arranged, used for pre-centering the side of the small end arm of the excavator arm body; a small end supporting mechanism connected to the second sliding seat, located on the X direction side of the small end centering mechanism, comprising a second adjustable height supporting seat and a second fixed height supporting seat distributed along the Y direction; a third X direction guide rail connected to the second sliding seat, located on the X direction side of the small end supporting mechanism; a third sliding seat slidably connected to the third X direction guide rail; a small end pushing mechanism connected to the third sliding seat, used for abutting and positioning an end of the small end arm of the excavator arm body; The positioning and clamping method comprises the following steps: S1: adjusting the positions of the first sliding seat, the second sliding seat and the third sliding seat according to the model and specifications of the excavator arm body; adjusting the height of the first adjustable height supporting seat to be lower than the height of the first fixed height supporting seat; adjusting the height of the second adjustable height supporting seat to be lower than the height of the second fixed height supporting seat; S2: hoisting the excavator arm body to the positioning and clamping tool, so that the X direction end of the large end arm abuts against the large end abutting mechanism, the lower part of the large end arm is supported on the first fixed height supporting seat, and the lower part of the small end arm is supported on the second fixed height supporting seat; S3: controlling the third sliding seat to move away from the X direction, so that the small end pushing mechanism pushes the X direction end of the small end arm, and the excavator arm body is positioned in the X direction. S4: control the first and second centering clamping arms of the large-end pre-centering mechanism to pre-center the sides of the large-end arm, and control the third and fourth centering clamping arms of the small-end pre-centering mechanism to pre-center the sides of the small-end arm; S5: control the first and second laser ranging sensors to perform laser ranging on both sides of the middle part of the excavator arm body, and adjust the positions of the third and fourth side clamping arms according to the ranging results, so that when the distance difference between the two sides detected by the first and second laser ranging sensors is less than 1mm, the adjustment of the third and fourth side clamping arms is stopped; S6: control the first, second, fifth and sixth side clamping arms to respectively position and clamp the excavator arm; S7: adjust the first height-adjustable support seat to support the large-end bottom of the excavator arm body, and adjust the second height-adjustable support seat to support the small-end bottom of the excavator arm body.

2. The positioning and clamping method of a power shovel boom according to claim 1, characterized by The first height-adjustable support seat comprises a jacking oil cylinder and a support seat body connected to the upper end of the jacking oil cylinder, the side of the piston rod of the jacking oil cylinder is provided with a limiting inclined surface, and the side of the jacking oil cylinder is provided with a side limiting oil cylinder, the end of the piston rod of the side limiting oil cylinder is opposite to the limiting inclined surface; In S7, the adjustment of the first height-adjustable support seat to support the large-end bottom of the excavator arm body specifically comprises: controlling the jacking oil cylinder to drive the support seat body to support the large-end bottom of the excavator arm body, and controlling the side limiting oil cylinder to be locked against the limiting inclined surface.

3. The positioning and clamping method of a power shovel boom according to claim 1, characterized by The first side clamping arm is connected with a first height adjusting mechanism, and the second side clamping arm is connected with a second height adjusting mechanism; In S1, it further comprises adjusting the first and second height adjusting mechanisms according to the model specifications of the excavator arm body.

4. The positioning and clamping method of a power shovel boom according to claim 1, characterized by The third side clamping arm is connected with a third height adjusting mechanism, and the fourth side clamping arm is connected with a fourth height adjusting mechanism; In S1, it further comprises adjusting the third and fourth height adjusting mechanisms according to the model specifications of the excavator arm body.

5. The positioning and clamping method of a power shovel boom according to claim 1, characterized by The fifth side clamping arm is connected with a fifth height adjusting mechanism, and the sixth side clamping arm is connected with a sixth height adjusting mechanism; In S1, it further comprises adjusting the fifth and sixth height adjusting mechanisms according to the model specifications of the excavator arm body.

6. The positioning and clamping method of a power shovel boom according to claim 1, characterized by The large-end abutting mechanism comprises a connecting frame, an abutting baffle connected to the connecting frame, a pressing swing arm pivoted to the connecting frame, and a driving cylinder connected between the connecting frame and the pressing swing arm; the cylinder body of the driving cylinder is pivoted to the connecting frame, and the end of the piston rod of the driving cylinder is pivoted to the pressing swing arm; In S7, it further comprises controlling the driving cylinder to drive the pressing swing arm to swing downward and abut against the upper part of the large end of the excavator arm body.

7. The positioning and clamping method of a power shovel boom according to Claim 1, wherein The large-end support mechanism further comprises a Y-direction guide rail, and the first height-adjustable support seat and the first fixed-height support seat are respectively slidably connected to the Y-direction guide rail; In S1, it further comprises adjusting the distance between the first height-adjustable support seat and the first fixed-height support seat according to the model specifications of the excavator arm body.

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