A clamping method for milling mounting planes of welded irregular-shaped parts

Abstract

This invention relates to the field of aero-engine manufacturing technology, and more particularly to a clamping method for milling mounting planes on welded irregularly shaped parts. A clamping fixture is used to clamp the welded irregularly shaped part. The fixture includes a base and fastening screws. A support is mounted on the top surface of the base, and the upper part of the support is configured as a bent section. A hollow positioning sleeve is inserted into the through hole of the bent section, and the upper half of the hollow positioning sleeve is inserted into the positioning hole of the welded irregularly shaped part. A first washer is provided on the lower surface of the bent section. The fastening screw passes through the first washer and the central hole of the hollow positioning sleeve in sequence, and then screws into the process thread hole of the welded irregularly shaped part. Tightening the fastening screw pulls the welded irregularly shaped part taut, so that the lower end face of the joint of the welded irregularly shaped part abuts against the bent section of the support. An angular positioning seat is mounted on the top surface of the base, and the angular positioning seat is provided with a U-shaped groove. An angular positioning pin is inserted into the pin hole of the welded irregularly shaped part; the lower end of the angular positioning pin is engaged in the U-shaped groove.

Description

Technical Field

[0001] This invention relates to the field of aero-engine manufacturing technology, and in particular to a clamping method for milling mounting planes of welded irregular-shaped parts. Background Technology

[0002] In the field of aerospace manufacturing, complex-shaped welded components are often used to achieve specific functions. Some of these components require machining after assembly and welding. The biggest challenge in machining these welded components is achieving reliable and stable clamping.

[0003] Combination Figure 1 The image shows a partial sectional view of a welded irregular part 100. The welded irregular part 100 includes a housing 101, on which a flange plate 102 is welded. Bolt mounting posts 103 are inserted at the four corners of the flange plate 102 and are welded to the flange plate 102. The bottom of the welded irregular part 100 is provided with a connector 104 and an angular positioning block 105. A process threaded hole 104b and a positioning hole 104a with a diameter of φD are provided at the center of the connector 104. A pin hole 105a with a diameter of φE is provided on the angular positioning block 105 for angular positioning.

[0004] In the aforementioned welded irregular part 100, the top surface M of the flange plate 102 is the mounting plane, which needs to be milled. At the same time, the welding part between the bolt mounting post 103 and the flange plate 102 is milled flat.

[0005] Since the aforementioned welded irregular part 100 is an irregular structural part, how to reliably and stably clamp it during the milling of the mounting plane is an urgent problem to be solved. Summary of the Invention

[0006] The main objective of this invention is to provide a clamping method for milling mounting planes of welded irregular-shaped parts, aiming to solve the aforementioned technical problems.

[0007] To achieve the above objectives, this invention proposes a clamping method for milling and mounting planes of welded irregular-shaped parts. The method employs a clamp to clamp the welded irregular-shaped parts. The clamp includes a base and fastening screws. A support is mounted on the top surface of the base, the upper part of which is configured as a bent portion. A hollow positioning sleeve is inserted into the through hole of the bent portion, and the upper half of the hollow positioning sleeve is inserted into the positioning hole of the welded irregular-shaped part. A first washer is provided on the lower surface of the bent portion. The fastening screw passes sequentially through the first washer and the central hole of the hollow positioning sleeve, and then screws into the process thread hole of the welded irregular-shaped part. Tightening the fastening screw pulls the welded irregular-shaped part taut, causing the lower end face of the welded irregular-shaped part's connector to abut against the bent portion of the support. An angular positioning seat is mounted on the top surface of the base. A U-shaped groove is provided on the angular positioning seat. An angular positioning pin is inserted into the pin hole of the welded irregular-shaped part. The lower end of the angular positioning pin is engaged in the U-shaped groove of the angular positioning seat.

[0008] Preferably, a plurality of two-clamp mounting seats are installed on the top surface of the base. A first clamping block is slidably mounted on the top of one clamping block mounting seat, and a second clamping block is slidably mounted on the top of the other clamping block mounting seat. The first clamping block and the second clamping block each include a lead screw mounting part and a cantilever plate integrally formed on the lead screw mounting part. A protrusion is integrally formed on the side of the cantilever plate. A lead screw is jointly mounted on the lead screw mounting parts of the first clamping block and the second clamping block. The lead screw has a first screw section and a second screw section with opposite thread directions. The first screw section and the second screw section respectively cooperate with the threaded holes on the lead screw mounting parts of the first clamping block and the second clamping block. When clamping the welded irregular part, rotating the lead screw drives the first clamping block and the second clamping block to move closer to each other, so that the protrusion on the first clamping block and the second clamping block clamps onto the shell of the welded irregular part.

[0009] Preferably, a support plate is mounted on the cantilever plate via a rotating shaft; when clamping the welded irregular part, after the lead screw drives the first clamping block and the second clamping block to come closer together and clamp the shell of the welded irregular part, the support plate is rotated so that the support plate rotates around the axis of the rotating shaft to directly below the bolt mounting post of the welded irregular part; and a pad is placed on the support plate, which is supported on the lower end surface of the bolt mounting post.

[0010] Preferably, two support plates are provided on the cantilever plates of the first clamping block and the second clamping block, and pads are placed on the four support plates to support the four bolt mounting posts on the welded irregular parts.

[0011] Preferably, a sliding groove is provided on the top of the clamping block mounting base; a slider is integrally formed at the bottom end of the lead screw mounting part of the first clamping block and the second clamping block respectively; the slider slides in cooperation with the sliding groove; a pressure plate is installed on the top of the clamping block mounting base by a first screw, and the pressure plate rests on the top surface of the slider.

[0012] Preferably, an extension plate is integrally formed on the slider, and a slot is provided on the extension plate; a locking screw is screwed into the bottom of the slot; and the locking screw is inserted into the slot of the extension plate; a second washer is sleeved on the locking screw, and the second washer rests on the top surface of the extension plate; when clamping the welded irregular part, after the lead screw drives the first clamping block and the second clamping block to move closer together to clamp the shell of the welded irregular part, the locking screw is tightened so that the second washer is pressed against the extension plate of the slider; when it is necessary to release the welded irregular part, the locking screw is first loosened, and the lead screw is rotated to drive the first clamping block and the second clamping block to move away from each other.

[0013] Preferably, the ends of the lead screw are respectively configured as wrench-fitting sections; the wrench-fitting sections are quadrangular prism structures.

[0014] Preferably, a stop is installed on the angular positioning seat by screws, and the stop is located directly below the U-shaped groove; the lower end of the angular positioning pin abuts against the top surface of the stop.

[0015] Preferably, a tool setting block is mounted on the top surface of the base by a second screw; the top surface P and the right side surface M of the tool setting block are tool setting surfaces.

[0016] Preferably, the upper half of the hollow positioning sleeve is configured as a positioning section, and the lower half is configured as a plug-in section; the outer diameter of the positioning section is larger than the outer diameter of the plug-in section; the plug-in section is inserted into the through hole of the bent part of the support by means of interference fit; the positioning section is used to insert into the positioning hole of the welded irregular part; when the fastening screw is tightened to pull the welded irregular part tight, if the gap between the lower end face of the connector and the bent part of the support is not greater than 0.1mm when checked with a feeler gauge, it indicates that the fastening screw is tightened in place.

[0017] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0018] (1) By employing the clamping method provided in this invention, when clamping a welded irregular part, the upper half of the hollow positioning sleeve is inserted into the positioning hole of the welded irregular part; the fastening screw passes through the first washer and the central hole of the hollow positioning sleeve and then screws into the process thread hole of the welded irregular part. Tightening the fastening screw pulls the welded irregular part tight, so that the lower end face of the connector of the welded irregular part abuts against the bent part of the support; an angular positioning pin is inserted into the pin hole of the welded irregular part; the lower end of the angular positioning pin is engaged in the U-shaped groove of the angular positioning seat. The welded irregular part can be fastened and angularly positioned, and the clamping is simple and convenient.

[0019] (3) By using the clamping method provided in this invention, the protrusions on the first clamping block and the second clamping block are used to clamp the welded irregular part on the shell, while the support plate and the pad block are used to support the bottom surface of the four bolt mounting columns on the welded irregular part, which further improves the clamping stability and helps to improve the pass rate of part processing. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a partial structural cross-sectional view of a welded irregular-shaped component;

[0022] Figure 2 This is a front sectional view of the welded irregular-shaped parts after being clamped by a fixture in this invention;

[0023] Figure 3 This is a top view of the welded irregular-shaped parts after being clamped by a fixture in this invention;

[0024] Figure 4 This is a top view of the base structure in this invention;

[0025] Figure 5 This is a front view of the clamping block mounting base in this invention;

[0026] Figure 6 This is a top view of the clamping block mounting base in this invention;

[0027] Figure 7 This is a top view of the pressure plate in this invention;

[0028] Figure 8 for Figure 7 Sectional view of AA;

[0029] Figure 9 This is a top view of the angular positioning seat in this invention;

[0030] Figure 10 for Figure 9 BB section view;

[0031] Figure 11 This is a schematic diagram of the angular positioning pin in this invention;

[0032] Figure 12 This is a front view of the stop block in this invention;

[0033] Figure 13 This is a left view of the stop block in this invention;

[0034] Figure 14 This is a cross-sectional view of the hollow positioning sleeve in this invention;

[0035] Figure 15 This is a top view of the support structure in this invention;

[0036] Figure 16 for Figure 15 CC section view;

[0037] Figure 17 This is a schematic diagram of the lead screw structure in this invention;

[0038] Figure 18 for Figure 17 DD section view;

[0039] Figure 19 This is a front view of the blade block in this invention;

[0040] Figure 20 This is a top view of the blade block in this invention;

[0041] Figure 21 This is a front view of the first clamping block in this invention;

[0042] Figure 22 This is a top view of the first clamping block in this invention;

[0043] Figure 23 This is a front view of the second clamping block in this invention;

[0044] Figure 24 This is a top view of the second clamping block in this invention;

[0045] Figure 25 This is a cross-sectional view of the first washer in this invention.

[0046] Reference numerals: 1. Base; 2. Clamping block mounting seat; 2a. Slide groove; 3. Pressure plate; 4. Angular positioning seat; 4a. U-shaped groove; 5. Angular positioning pin; 6. Stop block; 7. Hollow positioning sleeve; 7a. Positioning section; 7b. Insertion section; 8. First washer; 9. Support; 10. Tool setting block; 11. Lead screw; 11a. First screw section; 11b. Second screw section; 11c. Wrench mating section; 12. First clamping block; 13. Second clamping block; 14. Nameplate; 15. Slotted disc screw; 16. Second screw; 17. Fastening screw; 1 8. Limiting screw; 19. Second washer; 20. First screw; 21. Third screw; 22. First cylindrical pin; 23. Second cylindrical pin; 24. Support plate; 25. Pad; 26. Screw mounting part; 27. Cantilever plate; 27a. Protrusion block; 28. Slider; 28a. Slot; 29. ​​Rotating shaft; 100. Welded irregular part; 101. Housing; 102. Edge plate; 103. Bolt mounting post; 104. Connector; 104a. Positioning hole; 104b. Process threaded hole; 105. Angular positioning block; 105a. Pin hole. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0048] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0049] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0050] Combination Figure 1As shown, the welded irregular part 100 includes a housing 101, on which a flange plate 102 is welded. Bolt mounting posts 103 are inserted at the four corners of the flange plate 102 and are welded to the flange plate 102. The bottom of the welded irregular part 100 is provided with a connector 104 and an angular positioning block 105. A process threaded hole 104b and a positioning hole 104a with a diameter of φD are provided at the center of the connector 104. A pin hole 105a with a diameter of φE is provided on the angular positioning block 105 for angular positioning. The top surface M of the flange plate 102 is a mounting plane and needs to be milled. Simultaneously, the welding area between the bolt mounting posts 103 and the flange plate 102 is milled flat.

[0051] Combination Figures 2 to 25 As shown, this embodiment provides a clamping method for milling and mounting planes of welded irregular parts. A clamp is used to clamp the welded irregular part 100. The clamp includes a base 1 and fastening screws 17. A support 9 is installed on the top surface of the base 1. The upper part of the support 9 is configured as a bent portion 9a, and a hollow positioning sleeve 7 is inserted into the through hole of the bent portion 9a. The upper half of the hollow positioning sleeve 7 is inserted into the positioning hole 104a of the welded irregular part 100. A first washer 8 is provided on the lower surface of the bent portion 9a, and the fastening screw 17 passes through the first washer 8 and the hollow positioning sleeve 7 in sequence. The center hole of the positioning sleeve 7 is screwed into the process threaded hole 104b of the welded irregular part 100. Tightening the fastening screw 17 pulls the welded irregular part 100 tight, causing the lower end face of the connector 104 of the welded irregular part 100 to abut against the bent portion 9a of the support 9. An angular positioning seat 4 is installed on the top surface of the base 1 via a third screw 21 and a second cylindrical pin 23. A U-shaped groove 4a is provided on the angular positioning seat 4. An angular positioning pin 5 is inserted into the pin hole 105a of the welded irregular part 100. The lower end of the angular positioning pin 5 is engaged in the U-shaped groove 4a of the angular positioning seat 4. When tightening the fastening screw 17 to pull the welded irregular part 100 tight, a feeler gauge is used to check that the gap between the lower end face of the connector 104 and the bent portion 9a of the support 9 is no greater than 0.1mm, indicating that the fastening screw 17 is properly tightened.

[0052] Multiple clamping block mounting seats 2 are installed on the top surface of the base 1. Specifically, the clamping block mounting seats 2 are mounted on the base 1 via first cylindrical pins 22 and screws. A first clamping block 12 is slidably mounted on the top of one clamping block mounting seat 2, and a second clamping block 13 is slidably mounted on the top of the other clamping block mounting seat 2. The first clamping block 12 and the second clamping block 13 each include a lead screw mounting part 26 and a cantilever plate 27 integrally formed on the lead screw mounting part 26. A protrusion 27a is integrally formed on the side of the cantilever plate 27. A lead screw 11 is jointly mounted on the lead screw mounting part 26 of the first clamping block 12 and the second clamping block 13. It has a first screw section 11a and a second screw section 11b with opposite screw directions; the first screw section 11a and the second screw section 11b respectively cooperate with the threaded holes on the screw mounting part 26 on the first clamping block 12 and the second clamping block 13; when clamping the welded irregular part 100, the rotating screw 11 drives the first clamping block 12 and the second clamping block 13 to move closer to each other, so that the protrusions 27a on the first clamping block 12 and the second clamping block 13 are clamped on the housing 101 of the welded irregular part 100.

[0053] A support plate 24 is mounted on the cantilever plate 27 via a rotating shaft 29. When clamping the welded irregular part 100, after the lead screw 11 drives the first clamping block 12 and the second clamping block 13 to come together and clamp the housing 101 of the welded irregular part 100, the support plate 24 is rotated so that the support plate 24 rotates around the axis of the rotating shaft 28 to be directly below the bolt mounting post 103 of the welded irregular part 100; and a pad 25 is placed on the support plate 24, which is used to support the lower end face of the bolt mounting post 103. Further, two support plates 24 are provided on the cantilever plate 27 of the first clamping block 12 and the second clamping block 13, and pads 25 are placed on the four support plates 24 to support the four bolt mounting posts 103 on the welded irregular part 100.

[0054] A sliding groove 2a is provided on the top of the clamping block mounting base 2; a slider 28 is integrally formed at the bottom end of the screw mounting part 26 of the first clamping block 12 and the second clamping block 13 respectively; the slider 28 slides in cooperation with the sliding groove 2a; a pressure plate 3 is installed on the top of the clamping block mounting base 2 by a first screw 20, and the pressure plate 3 rests on the top surface of the slider 28.

[0055] An extension plate is integrally formed on the slider 28, and a slot 28a is provided on the extension plate; a locking screw 18 is screwed into the bottom of the slot 2a; and the locking screw 18 is inserted into the slot 28a of the extension plate; a second washer 19 is sleeved on the locking screw 18, and the second washer 19 rests on the top surface of the extension plate; when clamping the welded irregular part 100, after the lead screw 11 drives the first clamping block 12 and the second clamping block 13 to move closer together and clamp the housing 101 of the welded irregular part 100, the locking screw 18 is tightened so that the second washer 19 is pressed against the extension plate of the slider 28; when it is necessary to release the welded irregular part 100, the locking screw 18 is first loosened, and the lead screw 11 is rotated to drive the first clamping block 12 and the second clamping block 13 away from each other.

[0056] Combination Figure 17 , 18 As shown, the ends of the lead screw 11 are respectively configured as wrench mating sections 11c; the wrench mating sections 11c are quadrangular prism structures. The wrench mating sections 11c are used to engage with a wrench to facilitate the rotation of the lead screw 11.

[0057] Combination Figure 2 As shown, a stop block 6 is installed on the angular positioning seat 4 by screws, and the stop block 6 is located directly below the U-shaped groove 4a; the lower end of the angular positioning pin 5 abuts against the top surface of the stop block 6.

[0058] Combination Figure 2 As shown, a tool setting block 10 is mounted on the top surface of the base 1 by a second screw 16; the top surface P and the right side surface Q of the tool setting block 10 are tool setting surfaces.

[0059] Combination Figure 14 As shown, the upper half of the hollow positioning sleeve 7 is configured as a positioning section 7a, and the lower half is configured as a plug-in section 7b; the outer diameter of the positioning section 7a is larger than the outer diameter of the plug-in section 7b; the plug-in section 7b is inserted into the through hole of the bent part 9a of the support 9 by means of interference fit.

[0060] The clamping method provided by this invention includes the following two processes:

[0061] (1) Fixture assembly process:

[0062] The angular positioning seat 4 is mounted on the base 1 using the third screw 21 and the second cylindrical pin 23. The two clamping block mounting seats 2 are mounted on the base 1 using the first cylindrical pin 22 and screws, respectively. The support 9 is mounted on the mounting seat 1 using screws and pins. The hollow positioning sleeve 7 is inserted into the mating hole of the bent portion 9a of the support 9. The lead screw 11 is inserted into the threaded holes on the lead screw mounting portions 26 of the first clamping block 12 and the second clamping block 13. The first clamping block 12 and the second clamping block 13 are mounted on the sliding grooves 2a of the clamping block mounting seat 2, respectively. A pressure plate 3 is mounted on the top of the clamping block mounting seat 2 using the first screw 20, and the pressure plate 3 rests on the top surface of the sliders 28 of the first clamping block 12 and the second clamping block 13. Under the control of the lead screw 11, the first clamping block 12 and the second clamping block 13 move in both directions, either closer together or further apart. A stop block 6 is mounted on the angular positioning seat 4 using screws. The tool setting block 10 is mounted on the base 1 using the second screw 16.

[0063] (2) Part clamping process:

[0064] The welded irregular part 100 to be processed is assembled onto the fixture. First, the positioning hole 104a of the welded irregular part 100 with a diameter of φD is fitted onto the positioning section 7a of the hollow positioning sleeve 7 on the support 9. Next, a first washer 8 is provided on the lower surface of the bent part 9a of the support 9. The fastening screw 17 is passed through the first washer 8 and the center hole of the hollow positioning sleeve 7 in sequence and screwed into the process thread hole 104b of the welded irregular part 100 and pre-tightened. Then, the angular positioning pin 5 is inserted into the pin hole 105a of the welded irregular part 100 with a diameter of φE. The lower end of the angular positioning pin 5 is locked in the U-shaped groove 4a of the angular positioning seat 4, and the lower end of the angular positioning pin 5 is supported by the stop block 6. The screw 11 is rotated so that the first clamping block 12 and the second clamping block 13 move closer to each other, clamping the two sides of the shell 101 of the welded irregular part 100. Rotate the support plate 24 so that it rotates around the axis of the rotating shaft 28 to the position directly below the bolt mounting post 103 of the welded irregular part 100; and place a pad 25 on the support plate 24, using the pad 25 to support the lower end face of the bolt mounting post 103.

[0065] Finally, tighten the fastening screw 17 again. When the gap between the lower end face of the connector 104 and the bent part 9a of the support 9 is no more than 0.1mm, it means that the fastening screw 17 is tightened in place.

[0066] Combination Figure 2 As shown, before milling the top surface M of the flange 102, aligning the front and rear end faces of the fixture base 1 determines the zero point in the Y direction. Aligning the right side Q of the tool block 10 and translating it to the right by dimension X determines the zero point in the X direction. Aligning the top surface P of the tool block 10 and translating it upwards by dimension Z determines the zero point in the Z direction.

[0067] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A clamping method for milling mounting planes of welded irregular-shaped parts, characterized in that, A clamp is used to clamp the welded irregular part (100), the clamp including a base (1) and a fastening screw (17). A support (9) is installed on the top surface of the base (1). The upper part of the support (9) is configured as a bending part (9a), and a hollow positioning sleeve (7) is inserted into the through hole of the bending part (9a). The upper half of the hollow positioning sleeve (7) is inserted into the positioning hole (104a) of the welded irregular part (100). A first washer (8) is provided on the lower surface of the bent portion (9a). The fastening screw (17) passes through the center hole of the first washer (8) and the hollow positioning sleeve (7) in sequence and then screws into the process thread hole (104b) of the welded part (100). Tightening the fastening screw (17) will pull the welded part (100) tight, so that the lower end face of the connector (104) of the welded part (100) abuts against the bent portion (9a) of the support (9). An angular positioning seat (4) is installed on the top surface of the base (1); a U-shaped groove (4a) is provided on the angular positioning seat (4); an angular positioning pin (5) is inserted into the pin hole (105a) of the welded irregular part (100); the lower end of the angular positioning pin (5) is stuck in the U-shaped groove (4a) of the angular positioning seat (4); Two clamping block mounting seats (2) are installed on the top surface of the base (1). A first clamping block (12) is slidably installed on the top of one of the clamping block mounting seats (2), and a second clamping block (13) is slidably installed on the top of the other clamping block mounting seat (2). The first clamping block (12) and the second clamping block (13) respectively include a lead screw mounting part (26) and a cantilever plate (27) integrally formed on the lead screw mounting part (26). A support plate (24) is mounted on the cantilever plate (27) via a rotating shaft (29). When clamping the welded part (100), after the lead screw (11) drives the first clamping block (12) and the second clamping block (13) to come together and clamp the housing (101) of the welded part (100), the support plate (24) is rotated so that the support plate (24) rotates around the axis of the rotating shaft (29) to be directly below the bolt mounting post (103) of the welded part (100). A pad (25) is placed on the support plate (24) and supported on the lower end face of the bolt mounting post (103) by the pad (25).

2. The clamping method for milling mounting planes of welded irregular-shaped parts as described in claim 1, characterized in that, A protrusion (27a) is integrally formed on the side of the cantilever plate (27); a lead screw (11) is installed on the lead screw mounting part (26) of the first clamping block (12) and the second clamping block (13). The lead screw (11) has a first screw section (11a) and a second screw section (11b) with opposite screw directions. The first screw section (11a) and the second screw section (11b) respectively mate with the threaded holes on the screw mounting parts (26) on the first clamping block (12) and the second clamping block (13); When clamping the welded irregular part (100), the rotating screw (11) drives the first clamping block (12) and the second clamping block (13) to move closer to each other, so that the protrusions (27a) on the first clamping block (12) and the second clamping block (13) are clamped on the shell (101) of the welded irregular part (100).

3. The clamping method for milling mounting planes of welded irregular-shaped parts as described in claim 1, characterized in that, Two support plates (24) are provided on the cantilever plates (27) of the first clamping block (12) and the second clamping block (13), and pads (25) are placed on the four support plates (24) respectively to support the four bolt mounting columns (103) on the welded irregular part (100).

4. The clamping method for milling mounting planes of welded irregular-shaped parts as described in claim 2, characterized in that, A groove (2a) is provided on the top of the clamping block mounting base (2); A slider (28) is integrally formed at the bottom end of the lead screw mounting part (26) of the first clamping block (12) and the second clamping block (13); the slider (28) slides in conjunction with the slide groove (2a); A pressure plate (3) is mounted on the top of the clamping block mounting base (2) by a first screw (20), and the pressure plate (3) rests on the top surface of the slider (28).

5. The clamping method for milling mounting planes of welded irregular-shaped parts as described in claim 4, characterized in that, An extension plate is integrally formed on the slider (28), and a slot (28a) is provided on the extension plate; a locking screw (18) is screwed on the bottom of the slot (2a); and the locking screw (18) is inserted into the slot (28a) of the extension plate; a second washer (19) is sleeved on the locking screw (18), and the second washer (19) rests on the top surface of the extension plate; When clamping the welded irregular part (100), after the lead screw (11) drives the first clamping block (12) and the second clamping block (13) to come together and clamp the housing (101) of the welded irregular part (100), the locking screw (18) is tightened so that the second washer (19) is pressed against the extension plate of the slider (28); When it is necessary to loosen the welded irregular part (100), first loosen the locking screw (18), and rotate the lead screw (11) to drive the first clamp (12) and the second clamp (13) away from each other.

6. The clamping method for milling mounting planes of welded irregular-shaped parts as described in claim 2, characterized in that, The ends of the lead screw (11) are respectively configured as wrench mating sections (11c); the wrench mating sections (11c) are quadrangular prism structures.

7. The clamping method for milling mounting planes of welded irregular-shaped parts as described in claim 1, characterized in that, A stop (6) is installed on the angular positioning seat (4) by screws, and the stop (6) is located directly below the U-shaped groove (4a); the lower end of the angular positioning pin (5) abuts against the top surface of the stop (6).

8. The clamping method for milling mounting planes of welded irregular-shaped parts as described in claim 1, characterized in that, A tool setting block (10) is installed on the top surface of the base (1) by a second screw (16); the top surface P and the right side surface M of the tool setting block (10) are tool setting surfaces.

9. A clamping method for milling mounting planes of welded irregular-shaped parts as described in claim 1, characterized in that, The upper half of the hollow positioning sleeve (7) is configured as a positioning section (7a), and the lower half is configured as a plug-in section (7b); the outer diameter of the positioning section (7a) is larger than the outer diameter of the plug-in section (7b); the plug-in section (7b) is inserted into the through hole of the bent part (9a) of the support (9) by means of interference fit; the positioning section (7a) is used to be inserted into the positioning hole (104a) of the welded irregular part (100); When tightening the fastening screw (17) to pull the welded irregular part (100) tight, if the gap between the lower end face of the connector (104) and the bent part (9a) of the support (9) is not greater than 0.1mm, it indicates that the fastening screw (17) is tightened in place.

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