Clamping method and machining method of special-shaped welded box

Abstract

The invention discloses a clamping method for a special-shaped welded box body. The clamping method comprises the following steps: a) clamping a box cover; b) clamping the box body; and c) clamping the box body and the box cover. The invention further discloses a machining method of the special-shaped welding type box body, and the machining method comprises the steps that 1, scribing is conducted on the box cover, and the box cover is clamped and machined; 2, marking a box body, clamping the box body and recording corresponding coordinate values; and 3, the combined box body is assembled, and machining of all positions on the combined box body is completed. According to the clamping method and the machining method, it is guaranteed that after the box body and the box cover are closed, the relative benchmark for machining all bearing holes is unified, the problem that the special-shaped box body is difficult to clamp and align is solved, and the machining quality of the special-shaped box body is guaranteed; meanwhile, the clamping device is simple in structure, low in production cost, convenient to manufacture, high in safety, capable of greatly improving the machining quality and precision of the special-shaped welding type box body and suitable for batch production.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing and manufacturing, and relates to a clamping method for a special-shaped welded box body. The invention also relates to a processing method for the special-shaped welded box body. Background Art

[0002] The oil drilling equipment industry has maintained a rapid development momentum in recent years. Under the general environment of rapid growth of global upstream oil and gas investment, oil and gas exploration and production investment will achieve stable and rapid growth, and the oil drilling equipment industry has also ushered in a high-speed development prospect. Some special-shaped welded box parts have appeared in oil drilling equipment. These structural boxes are generally composed of a box body and a box cover combined by positioning pins and stud bolts.

[0003] Due to the limitation of the equipment structure, the external structure of the box parts is generally irregular and the external dimensions do not increase much with the increase of equipment models. The processing of the parts generally requires larger equipment, but due to the limitation of its external structure, the workpiece is difficult to clamp, position and align. At the same time, after the box and the cover are assembled, there is also the problem of conversion between the relative reference of the joint surface and each bearing seat, which brings many inconveniences to the production and manufacturing, and seriously affects the production cycle and manufacturing efficiency of the product. How to meet the processing accuracy requirements of such special-shaped welded boxes has become an urgent problem to be solved. Summary of the invention

[0004] The purpose of the present invention is to provide a clamping method for a special-shaped welded box body, which solves the problems in the prior art of difficult clamping, positioning and alignment of workpieces during the processing of the special-shaped welded box body.

[0005] Another object of the present invention is to provide a method for processing a special-shaped welded box body, which solves the problem in the prior art that it is difficult to ensure the processing accuracy requirements during the processing of the special-shaped welded box body.

[0006] The technical solution adopted by the present invention is a clamping method for a special-shaped welded box, which is implemented according to the following steps:

[0007] Step a) Clamping the box cover;

[0008] Step b) clamping the box;

[0009] Step c) completes the clamping of the box body and the box cover.

[0010] Another technical solution adopted by the present invention is a method for processing a special-shaped welded box, which is implemented according to the following steps:

[0011] Step 1: Mark the box cover, clamp the box cover and process it;

[0012] Step 2: Mark the box, clamp the box and record the corresponding coordinate values;

[0013] Step 3: Assemble the combined box and complete the processing of various parts on the combined box.

[0014] The beneficial effects of the present invention include the following aspects:

[0015] 1) It can not only effectively ensure the uniformity of the relative datum of the bearing holes processed at various places after the box body and the box cover are assembled, but also solve the problem of difficulty in clamping and aligning the special-shaped box body, thereby ensuring the processing quality of the special-shaped box body; at the same time, the clamping device has a relatively simple structure, low production cost and convenient manufacturing.

[0016] 2) The clamping method of the special-shaped welded box body of the present invention is simple to operate and highly safe, and greatly improves the processing efficiency of the special-shaped welded box body;

[0017] 3) In the processing method of the special-shaped welded box body of the present invention, the bracket 1 can be used to perform rough processing of the joint surface of the box body alone, and can also perform semi-finishing and finishing of the integral bearing seat hole and end surface after the box body and the box cover are combined. It can be said that it kills two birds with one stone. Its structure is compact, safe and reliable, thereby improving the processing quality and precision of the special-shaped welded box body, and is suitable for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view of a processing method for a special-shaped welded box body of the present invention;

[0019] Figure 2 It is a cross-sectional view in the bottom direction of the processing method of the special-shaped welded box body of the present invention;

[0020] Figure 3 It is a front view of the processing state of the box cover in the processing method of the special-shaped welded box body of the present invention;

[0021] Figure 4 It is a front view of the processing state of the box body in the processing method of the special-shaped welded box body of the present invention.

[0022] In the figure, 1. box cover, 2. box body, 3. bracket 1, 4. support column 1, 5. fine-adjustment of top height, 6. web 1, 7. web 2, 8. locating pin, 9. stud bolt, 10. bracket 2, 11. support column 2, 12. joint surface a, 13. joint surface b, 14. pressure plate 1, 15. pressure plate 2, 16. stud bolt, 17. tightening nut. DETAILED DESCRIPTION

[0023] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Reference Figure 1 , Figure 3 , Figure 4 The clamping method and processing method of the present invention both rely on a clamping device, the structure of which includes a bracket unit 1 and a bracket unit 2. The bracket unit 1 and the bracket unit 2 have similar structures, and the sizes are slightly different according to the situation; the bracket unit 1 is for the box body 2 (i.e., the lower half of the special-shaped welded box body), and the bracket unit 2 is for the box cover 1 (i.e., the upper half of the special-shaped welded box body); a plurality of stud bolts 9 and a plurality of positioning pins 8 are connected between the box cover 1 and the box body 2, and the box cover 1 and the box body 2 are mainly fixedly connected by the plurality of stud bolts 9, and the relative misalignment of the box cover 1 and the box body 2 is strictly limited by the plurality of positioning pins 8;

[0025] Reference Figure 1 The structure of the bracket unit 1 is that it includes a bracket 3, the bottom plate surface (lower surface) of the bracket 3 is a finely machined plane, which serves as a positioning and installation reference for each component on the bracket 3; a plurality of supporting columns 4 are fixedly arranged on the upper surface of the bracket 3, and the upper end surfaces of all supporting columns 4 are used to jointly support the box body 2 and position the box body 2 together; according to whether the upper web 6 of the box body 2 is a step structure, each supporting column 4 is processed into an equal height structure or an unequal height structure to ensure that the step difference of adjacent supporting columns 4 is the same as the step difference of the web 6 of the box body 2 The difference is consistent; the upper surface of the bracket 3 is also provided with a plurality of fine-adjustment top heights 5, each of which is a movable independent unit, which is convenient for appropriate position adjustment according to the specific shape structure when the box body 2 is processed. On the one hand, its function is to provide auxiliary support for the box body 2, and on the other hand, it is used for fine-tuning and alignment of the horizontal position of the box body 2 during processing; the support column 4 and the fine-adjustment top height 5 are alternately arranged on the bracket 3, the support column 4 provides a rough positioning reference for the processing of the box body 2, and the fine-adjustment top height 5 provides an adjustable positioning precision reference for the processing of the box body 2;

[0026] Three threaded holes are opened on the upper surface of the bracket 3, corresponding to the three center positions of the bearing seat holes on the box body 2 respectively; a stud 16 is installed in each threaded hole, and the stud 16 is threadedly connected to the bracket 3, and the upper end of the stud 16 is set as a square structure to facilitate the installation and removal of the stud 16.

[0027] Reference Figure 3The structure of the bracket unit 2 is that it includes a bracket 2 10. The lower surface (bottom plate surface) of the bracket 2 10 is also a finely processed plane, which serves as a positioning and installation reference for each component on the bracket 2 10. The upper surface of the bracket 2 10 is respectively provided with a plurality of supporting columns 2 11 and a plurality of fine-adjusting top heights 5. The upper end surfaces of all the supporting columns 2 11 and the fine-adjusting top heights 5 are used to support and position the web 2 7 of the box cover 1. According to the characteristics of the irregular shape structure of the box cover, the supporting columns 2 11 are irregularly welded and distributed in sequence. On the upper surface of the bracket 10, according to whether the upper web 7 of the box cover 1 of different structural forms is a step structure, the height of each support column 11 is set to an equal height structure or an unequal height structure, so as to ensure that the step difference of adjacent support columns 11 is consistent with the step difference of the actual web 7; the support columns 11 and the fine-adjustment top height 5 are alternately arranged on the bracket 10, and the support columns 11 provide a rough positioning reference for the processing of the box cover 1, and the fine-adjustment top height 5 provides an adjustable positioning precision reference for the processing of the box cover 1;

[0028] The upper surface of the bracket 10 also has three threaded holes 2, which correspond to the center positions of the three bearing seat holes on the box cover 1. A stud 16 is installed in each threaded hole 2; the upper end of the stud 16 is set as a square structure, and the stud 16 is threadedly connected to the bracket 10 for easy disassembly and assembly.

[0029] Reference Figure 3 and Figure 4 When fixing and installing the box cover 1 or the box body 2, a pressure plate 15 is mounted on the upper part of each stud 16, and a clamping nut 17 is mounted on the threaded section of the stud 16 above the pressure plate 15; the box cover 1 is fixed and clamped on the bracket 2 10 (such as Figure 3 ), or fix the box 2 on the bracket 3 (such as Figure 4 ).

[0030] The clamping method of the special-shaped welded box of the present invention adopts the above-mentioned clamping device and is implemented according to the following steps:

[0031] Step a) Clamp the box cover 1,

[0032] Place the lower surface of bracket 2 10 flat on the machine tool workbench.

[0033] First, determine whether there is a step or step difference according to whether H6 is equal to H7 on the actual web 27 on the box cover 1; when H6=H7, there is no step structure, and the upper end surface of each corresponding support column 2 11 is lightly milled to an equal height structure; when H6≠H7, there is a step structure, and the height of each support column 2 11 is processed into an unequal height structure according to the height difference between H6 and H7; ensure that the step difference of each support column 2 11 is consistent with the step difference of the actual web 2 7;

[0034] Then, the three studs 16 are firmly inserted downward into the corresponding threaded holes 2 of the bracket 2 10, so that the three studs 16 are fixedly connected to the bracket 2 10; Figure 3 The state shown is placed in the bracket 2 10, and the upper end surfaces of the three supporting columns 2 11 are supported on the web 2 7 of the box cover 1;

[0035] Next, press Figure 2 Arrangement method: Place the fine-adjusting top height 5 in the designated position in sequence, and fine-tune the height position of the box cover 1 by adjusting each fine-adjusting top height 5 until the processing line a12 of the joint surface of the box cover 1 is aligned in the same plane;

[0036] Finally, press Figure 2 Arrangement mode: install the three pressure plates 15 in place in sequence, and fix the box cover 1 on the bracket 10 by the clamping nut 17 to complete the clamping of the box cover 1. Then, process the joint surface a12 and the stud bolt hole on the box cover 1. Figure 3 shown.

[0037] Step b) Clamping the box 2,

[0038] Place the lower surface of bracket 13 flat on the machine tool workbench.

[0039] First, determine whether there is a step or step difference based on whether H4 on the actual web plate 6 of the box body 2 is equal to H5; when H4=H5, there is no step structure, and the upper end surface of each corresponding support column 4 is lightly milled to an equal height structure; when H6≠H7, there is a step structure, and the height of each support column 4 is processed into an unequal height structure according to the height difference between the corresponding H4 and H5; ensure that the step difference of each support column 4 is consistent with the step difference of the actual web plate 6;

[0040] Then, the three studs 16 are firmly inserted downward into the corresponding threaded holes 2 of the bracket 2 10, so that the three studs 16 are fixedly connected to the bracket 2 10; Figure 4 The state shown is placed in the bracket 3, and the upper end surface of the supporting column 4 is supported on the web 6 of the box body 2;

[0041] Next, press Figure 2 Arrangement method: multiple fine-adjusting top heights 5 are placed in the designated positions in sequence, and the height of the box body 2 is fine-adjusted by adjusting each fine-adjusting top height 5 until the processing line of the joint surface b13 of the box body 2 is aligned in the same plane;

[0042] Finally, press Figure 2The three pressing plates 15 are installed in place in sequence, and the box body 2 is fixed and pressed in the bracket 3 by the pressing nut 17 to complete the clamping of the box body 2. Then the joint surface b13 and the stud bolt holes on the box body 2 are processed. Figure 4 shown.

[0043] Step c) completes the clamping of the box body 2 and the box cover 1.

[0044] like Figure 1 As shown, keep the box body 2 on which the joint surface b13 and the stud bolt holes have been processed without loosening the compression nut 17, and hang the box cover 1 on which the joint surface a12 and the stud bolt holes have been processed horizontally onto the box body 2, that is, buckle the box cover 1 onto the box body 2; adjust the position of the box cover 1, and respectively pass a circle of stud bolts 9 through the box cover 1 and the installation edge of the box body 2, and respectively use nuts to assemble them together;

[0045] Then the positioning pin holes are processed, and then the positioning pins 8 are installed in each positioning pin hole, so that the box cover 1 and the box body 2 are integrated into a combined box body, and the pressure plate 14 is as shown in FIG. Figure 2 Fix and press the combined box body in the position shown;

[0046] Finally, loosen all the clamping nuts 17, take out the clamping nuts 17 and the pressure plate 15 in turn, and screw the stud 16 out of the bracket 3 through the square at the top of the stud 16. The assembled box is assembled and the next step of processing of the assembled box can be continued as needed.

[0047] The processing method of the special-shaped welded box of the present invention adopts the above-mentioned clamping device and is implemented according to the following steps based on the above-mentioned clamped combined box:

[0048] Step 1: Mark the box cover 1, clamp the box cover 1 and process it.

[0049] 1.1) Mark the box cover 1,

[0050] Place the box cover 1 flat on the marking platform, support the belly plate 6, take the belly plate 6 on the box cover 1 as the rough reference, mark the processing line a12 of the joint surface on the box cover 1 around, take into account the center positions of the three bearing seat holes, mark the three center cross lines of the bearing seat holes, and mark the processing lines of the stud bolt holes.

[0051] 1.2) Clamp the box cover 1 and process it.

[0052] according to Figure 3 State, put the box cover 1 into the bracket 2 10, the upper end surfaces of the plurality of supporting columns 2 11 are supported on the web 2 7 of the box cover 1, and the Figure 2Arrangement method: put multiple fine-adjusting top heights 5 in the designated positions in sequence, fine-tune the height of the box cover 1 by adjusting each fine-adjusting top height 5, and align according to the processing line a12 of the joint surface marked on the box cover 1;

[0053] Then follow Figure 2 Arrangement mode: install each pressing plate 2 15 in place in sequence, and fix and press the box cover 1 in the bracket 2 10 by the clamping nut 17;

[0054] Then, take the center cross line of the bearing seat hole marked on the largest bearing seat hole as the reference, follow the coordinates, refer to the markings, drill through the stud bolt holes that need to be processed, first rough mill and then fine mill the joint surface a12 to complete it.

[0055] Step 2: Mark the box 2, clamp the box 2 and record the corresponding coordinate values.

[0056] 2.1) Draw lines for box 2,

[0057] Place the box body 2 with the opening facing upward on the marking platform, lift up the supporting web 2 7, use the web 2 7 on the box body 2 as a rough reference, mark the processing line of the joint surface b13 on the box body 2 for one circle, take into account the center positions of the three bearing seat holes, mark the three center cross lines of the bearing seat holes, and mark the processing lines of the stud bolt holes.

[0058] 2.2) Clamp the box 2 and record the corresponding coordinate values.

[0059] according to Figure 4 In the state shown, the box body 2 is placed in the bracket 3, and the upper end surfaces of the plurality of support columns 4 are supported on the web 6 of the box body 2. Figure 2 Arrangement method: Place each fine-tuning top height 5 in the specified position in turn, and fine-tune the height position of the box 2 by adjusting each fine-tuning top height 5; align according to the processing line b13 marked on the joint surface of the box 2, and then press Figure 2 The layout method is to install the pressure plate 2 15 in place in sequence, and fix the box body 2 in the bracket 3 by the clamping nut 17; take the cross line of the hole on the largest bearing seat hole as the reference, and record the center coordinate value A of the hole, follow the coordinates, refer to the markings, drill through the stud bolt holes that need to be processed, first rough mill and then fine mill the joint surface b13, and it will be alive; do not change the tool, and record the coordinate value B of the height direction of the joint surface b13 after fine processing.

[0060] Step 3: Assemble the combined box and complete the processing of various parts on the combined box.

[0061] 3.1) After the bonding surface a12 is processed in step 1 and the bonding surface b13 is processed in step 2, the box body 2 is not loosened with the compression nut 17 in the bracket 1 3, and the bracket 1 3 is also fixed on the machine tool workbench. Then, the box cover 1 with the bonding surface a12 and the stud bolt holes processed is placed as shown in FIG. Figure 1Hang it horizontally on the box body 2, and assemble it with stud bolts 9 and nuts respectively. When tightening the stud bolts 9, the outer position of the joint surface of the box cover 1 and the box body 2 should be used as the reference. After ensuring that the box cover 1 and the box body 2 are not misaligned, tighten the stud bolts 9;

[0062] Then, based on the hole center coordinate value A recorded in step 4, the coordinate is moved to process the positioning pin hole, and then the positioning pin 8 is installed in the positioning pin hole, and the pressure plate 14 is moved as shown in FIG. Figure 2 Fix and press the combined box body in the position shown;

[0063] Finally, loosen the clamping nut 17, and take out the clamping nut 17, the second pressure plate 15, and the stud 16 in sequence;

[0064] 3.2) Complete the processing of various parts on the combined box.

[0065] 3.2.1) Take the hole center coordinate value A and the height direction coordinate value B of the joint surface b13 recorded in step 4 as the reference, and still use the milling cutter used in step 4 to perform coordinate rough milling as follows: Figure 1 The upper end face of the largest bearing seat hole on the box cover 1 is used as the reference C for subsequent rough machining of all end faces, and the two end faces of the remaining bearing seat holes are rough machined in sequence;

[0066] 3.2.2) Rough machining based on the hole center coordinate value A recorded in step 4 Figure 1 The largest bearing seat hole on the box cover 1 is used as the reference D for rough machining of all subsequent holes, and the remaining bearing seat holes are rough machined in sequence;

[0067] 3.2.3) Based on the reference C, coordinate milling is as follows Figure 1 The upper end face of the largest bearing seat hole on the box cover 1 is used as the reference E for the subsequent finishing of all end faces, and the other two end faces of the bearing seat holes are finished in sequence;

[0068] 3.2.4) Based on the reference D, coordinate finishing is as follows Figure 1 The largest bearing seat hole on the box cover 1 is used as the reference F for the subsequent finishing of all holes. The remaining bearing seat holes are finished in sequence to ensure that Figure 1 The relative axial dimensions of the upper bearing seat hole are H1, H2, H3;

[0069] 3.2.5) Using reference F, drill the coordinates as shown below Figure 1 Drill and tap the threaded bottom hole on the end face of the largest bearing seat hole on the box cover 1, and drill and tap the threaded bottom holes on the end faces of the remaining bearing seat holes in turn.

[0070] Example 1

[0071] The overall structure of the clamping device of the present invention is shown in FIG. Figure 1 , Figure 2 , Figure 3 , Figure 4 ,in,

[0072] In the bracket unit 1, the bottom plate surface of the bracket 1 3 is a precision-machined plane, and the upper surface of the bracket 1 3 is fixedly provided with three supporting columns 1 4 and three fine-adjusting top heights 5; since the upper web 1 6 of the box body 2 is not a step structure (i.e., H4=H5), the corresponding processing of each supporting column 1 4 is an equal-height structure to provide positioning support for the box body 2;

[0073] In the bracket unit 2, the lower surface of the bracket 2 10 is also a precision-machined plane, and the upper surface of the bracket 2 10 is respectively provided with three supporting columns 2 11 and another three fine-adjusting top heights 5. According to the characteristics of the irregular shape structure of the box cover 1, the supporting columns 2 11 are irregularly welded and distributed on the upper surface of the bracket 2 10 in sequence. Since the web 2 7 on the box cover 1 is not a step structure (i.e., H6=H7), the corresponding processing of each supporting column 2 11 is an equal-height structure to position and support the box cover 1;

[0074] Then, the clamping device defined in the first embodiment is used to implement a clamping method for a special-shaped welded box body and a processing method for a special-shaped welded box body.

[0075] Example 2

[0076] The overall structure of the clamping device of the present invention is different from that of the first embodiment in that:

[0077] In the bracket unit 1, the bottom plate surface of the bracket 3 is a precision-machined plane, and the upper surface of the bracket 3 is fixedly provided with four supporting columns 4 and four fine-adjusting top heights 5; the upper web 6 of the box body 2 is a step structure (i.e., H4≠H5), and the heights of the supporting columns 4 are processed into unequal height structures according to the height difference between the corresponding H4 and H5, ensuring that the step difference between the adjacent supporting columns 4 is consistent with the step difference between the web 6 of the box body 2;

[0078] In the bracket unit 2, the lower surface of the bracket 2 10 is also a finely machined plane, and the upper surface of the bracket 2 10 is respectively provided with four supporting columns 2 11 and another four fine-adjusting top heights 5. According to the characteristics of the irregular shape structure of the box cover 1, the supporting columns 2 11 are welded irregularly in sequence on the upper surface of the bracket 2 10. The web 2 7 on the box cover 1 is a step structure (i.e. H6≠H7), and the height of each supporting column 2 11 is processed into an unequal height structure according to the corresponding height difference between H6 and H7 to ensure that the step difference between adjacent supporting columns 2 11 is consistent with the actual step difference of the web 2 7.

[0079] Then, the clamping device defined in the second embodiment is used to implement a clamping method for a special-shaped welded box body and a processing method for a special-shaped welded box body.

[0080] Example 3

[0081] The clamping device of the present invention is different from that of embodiment 1 in that:

[0082] In the bracket unit 1, the bottom plate surface of the bracket 1 3 is a finely machined plane, and the upper surface of the bracket 1 3 is fixedly provided with four supporting columns 1 4 and three fine-adjusting top heights 5; the upper web 1 6 of the box body 2 is a step structure (i.e. H4≠H5), and the heights of the supporting columns 1 4 are processed into unequal height structures to ensure that the step difference of the adjacent supporting columns 1 4 is consistent with the step difference of the web 1 6 of the box body 2;

[0083] In the bracket unit 2, the lower surface of the bracket 2 10 is also a finely machined plane, and the upper surface of the bracket 2 10 is respectively provided with four supporting columns 2 11 and another three fine-tuning top heights 5. According to the characteristics of the irregular shape structure of the box cover 1, the supporting columns 2 11 are welded irregularly in sequence on the upper surface of the bracket 2 10. The web 2 7 on the box cover 1 is a step structure (i.e. H6≠H7), and the height of each supporting column 2 11 is processed into an unequal height structure according to the corresponding height difference between H6 and H7 to ensure that the step difference between adjacent supporting columns 2 11 is consistent with the actual step difference of the web 2 7.

[0084] Then, the clamping device defined in the third embodiment is used to implement a clamping method for a special-shaped welded box body and a processing method for a special-shaped welded box body.

Claims

1. A method for clamping a special-shaped welded box, characterized in that: Follow these steps to implement: Step a) Clamping the box cover (1); Step b) clamping the box (2); Step c) completes the clamping of the box body (2) and the box cover (1).

2. The clamping method of the special-shaped welded box according to claim 1 is characterized in that: In step a), the specific process is: Place the lower surface of bracket 2 (10) flat on the machine table. First, determine whether there is a step or step difference according to whether H6 is equal to H7 on the actual web plate 2 (7) on the box cover (1); when H6=H7, there is no step structure, and the upper end surface of each corresponding supporting column 2 (11) is lightly milled to an equal height structure; when H6≠H7, there is a step structure, and the height of each supporting column 2 (11) is processed into an unequal height structure according to the height difference between H6 and H7; Then, the three studs (16) are inserted downward into the corresponding threaded holes 2 of the bracket 2 (10); the box cover (1) is placed into the bracket 2 (10), and the upper end surfaces of the three supporting columns 2 (11) are supported on the web 2 (7) of the box cover (1); Next, multiple fine-adjusting top heights (5) are sequentially placed at designated positions, and the height of the box cover (1) is fine-adjusted by adjusting each fine-adjusting top height (5) until the processing lines of the joint surface a (12) of the box cover (1) are aligned in the same plane; Finally, the three second pressing plates (15) are installed in place in sequence, and the box cover (1) is fixed and pressed on the second bracket (10) by the clamping nut (17), thereby completing the clamping of the box cover (1).

3. The clamping method of the special-shaped welded box according to claim 1, characterized in that: In step b), the specific process is: Place the lower surface of bracket 1 (3) flat on the machine table. First, determine whether there is a step or step difference based on whether H4 is equal to H5 on the actual web plate 1 (6) on the box body (2); when H4=H5, there is no step structure, and the upper end surface of each corresponding support column 1 (4) is lightly milled to an equal height structure; when H6≠H7, there is a step structure, and the height of each support column 1 (4) is processed into an unequal height structure according to the height difference between the corresponding H4 and H5. Then, three stud bolts (16) are inserted downward into corresponding threaded holes 2 of bracket 2 (10); the box body (2) is placed into bracket 1 (3), and the upper end surface of support column 1 (4) is supported on web 1 (6) of the box body (2); Next, multiple fine-adjusting top heights (5) are placed in the designated positions in sequence, and the height of the box body (2) is fine-adjusted by adjusting each fine-adjusting top height (5) until the processing lines of the joint surface b (13) of the box body (2) are aligned in the same plane; Finally, the three second pressing plates (15) are installed in place in sequence, and the box body (2) is fixed and pressed into the bracket (3) by the clamping nut (17), thereby completing the clamping of the box body (2).

4. The clamping method of the special-shaped welded box according to claim 1, characterized in that: In step c), the specific process is: Keep the box body (2) on which the joint surface b (13) and the stud bolt holes have been processed without loosening the compression nut (17), and hang the box cover (1) on which the joint surface a (12) and the stud bolt holes have been processed horizontally onto the box body (2), that is, buckle the box cover (1) onto the box body (2); adjust the position of the box cover (1), and respectively pass a circle of stud bolts (9) through the installation edges of the box cover (1) and the box body (2), and respectively assemble them together with nuts; Then, the positioning pin hole is processed, and the positioning pin (8) is installed into the positioning pin hole, so that the box cover (1) and the box body (2) are integrated into a combined box body, and the combined box body is fixed and pressed by the pressing plate 1 (14); Finally, loosen all the clamping nuts (17), take out the clamping nuts (17) and the second pressure plate (15) in turn, and screw the stud bolt (16) out of the bracket (3) through the four sides of the top of the stud bolt (16), and the combined box is assembled.

5. A method for processing a special-shaped welded box, characterized in that: Follow these steps to implement: Step 1, marking the box cover (1), clamping the box cover (1) and processing; Step 2, marking the box (2), clamping the box (2) and recording the corresponding coordinate values; Step 3: Assemble the combined box and complete the processing of various parts on the combined box.

6. The processing method of the special-shaped welded box according to claim 5, characterized in that: In step 1, the specific process is: 1.1) Score the box cover (1). Place the box cover (1) flat on the marking platform, support the web plate 1 (6) with the web plate 1 (6) on the box cover (1) as a rough reference, mark the processing line of the joint surface a (12) on the box cover (1) around the circle, take into account the center positions of the three bearing seat holes, mark the cross lines of the three bearing seat hole centers, and mark the processing lines of the stud bolt holes; 1.2) Clamp the box cover (1) and process it. The box cover (1) is placed in the bracket (10), the upper end surfaces of the plurality of supporting columns (11) are supported on the belly plate (7) of the box cover (1), and the plurality of fine-adjusting top heights (5) are sequentially placed at designated positions, and the height of the box cover (1) is fine-adjusted by adjusting each fine-adjusting top height (5), and the box cover (1) is aligned according to the processing line of the joint surface a (12) marked on the box cover (1); Then, each of the second pressing plates (15) is installed in place in sequence, and the box cover (1) is fixed and pressed into the second bracket (10) by means of the clamping nut (17); Then, take the cross line of the center of the largest bearing seat hole as the reference, follow the coordinates, refer to the marking line, drill through the stud bolt holes to be processed, and first rough mill and then fine mill the joint surface a (12).

7. The processing method of the special-shaped welded box according to claim 5, characterized in that: In step 2, the specific process is: 2.1) Mark the box (2), Place the box body (2) with the opening facing upward on the marking platform, lift up the supporting web plate 2 (7), use the web plate 2 (7) on the box body (2) as a rough reference, mark the processing line of the joint surface b (13) on the box body (2) around, take into account the center positions of the three bearing seat holes, mark the three cross lines of the center of the bearing seat holes, and mark the processing line of the stud bolt holes; 2.2) Clamp the box (2) and record the corresponding coordinate values. The box body (2) is placed in a bracket (3), the upper end surfaces of a plurality of support columns (4) are supported on a web (6) of the box body (2), and each fine-adjusting top height (5) is sequentially placed in a designated position, and the height position of the box body (2) is fine-tuned by adjusting each fine-adjusting top height (5); Align the processing line of the joint surface b (13) marked on the box body (2), then install the second pressing plate (15) in place in sequence, and fix the box body (2) in the bracket (3) by the clamping nut (17); Take the cross line drawn on the largest bearing seat hole as the reference, and record the coordinate value A of the center of the hole. Drill through the stud bolt hole to be processed by following the coordinate and referencing the drawn line. First, rough mill and then fine mill the joint surface b (13). Without changing the tool, record the coordinate value B of the height direction of the joint surface b (13) after finishing.

8. The processing method of the special-shaped welded box according to claim 5, characterized in that: In step 3, the specific process is: 3.1) After the joining surface a (12) is processed in step 1 and the joining surface b (13) is processed in step 2, the box body (2) is not loosened with the clamping nut 17 in the bracket one (3), and the bracket one (3) is also fixed on the machine tool workbench. Then, the box cover (1) with the joining surface a (12) and the stud bolt holes processed is horizontally suspended on the box body (2), and they are assembled together with stud bolts (9) and nuts respectively, and the stud bolts (9) are tightened; Then, taking the hole center coordinate value A recorded in step 4 as a reference, move the coordinates to process the positioning pin hole, insert the positioning pin (8) into the positioning pin hole, and fix and tighten the combined box body with the pressing plate 1 (14); Finally, loosen the clamping nut (17), and take out the clamping nut (17), the second pressure plate (15), and the stud (16) in sequence; 3.2) Complete the processing of various parts on the combined box. 3.2.1) Using the hole center coordinate value A and the height direction coordinate value B of the mating surface b (13) recorded in step 4 as references, still use the milling cutter used in step 4 to coordinately rough mill the upper end face of the largest bearing seat hole on the box cover (1), and use this machined surface as the reference C for subsequent rough machining of all end faces, and sequentially rough machine the remaining two end faces of the bearing seat holes; 3.2.2) Rough-machine the largest bearing seat hole on the box cover (1) using the hole center coordinate value A recorded in step 4 as a reference, use this hole as a reference D for rough machining of all subsequent holes, and rough-machine the remaining bearing seat holes in sequence; 3.2.3) Use the datum C and coordinate milling to finish the upper end face of the largest bearing seat hole on the box cover (1), and use this machined surface as the datum E for subsequent finishing of all end faces, and finish the other two end faces of the bearing seat holes in turn; 3.2.4) Use the datum D and coordinate finishing to finish the largest bearing seat hole on the box cover (1), and use this hole as the datum F for finishing all subsequent holes. Finish the remaining bearing seat holes in turn to ensure the relative axial dimensions H1, H2, and H3 of the bearing seat holes; 3.2.5) Using reference F and coordinates, drill the threaded bottom hole on the end face of the largest bearing seat hole on the box cover (1) and tap it. Then drill the threaded bottom holes on the end faces of the remaining bearing seat holes and tap them.

9. The clamping method of the special-shaped welded box according to claim 1, or the processing method of the special-shaped welded box according to claim 5, characterized in that: Relying on a clamping device, the structure of the clamping device is: The bracket unit 1 and the bracket unit 2 are two parts, the bracket unit 1 and the bracket unit 2 have similar structures, and the sizes are different according to the situation; The first bracket unit is for the box body (2), and the second bracket unit is for the box cover (1); A plurality of stud bolts (9) and a plurality of positioning pins (8) are connected between the box cover (1) and the box body (2); The structure of the bracket unit 1 is as follows: it comprises a bracket 1 (3), the upper surface of which is fixedly provided with a plurality of supporting columns 1 (4) and a plurality of fine-adjusting top heights (5); each supporting column 1 (4) is processed into an equal-height structure or an unequal-height structure; the upper surface of the bracket 1 (3) is provided with three threaded holes 1, which respectively correspond to the center positions of three bearing seat holes on the box body (2); and each threaded hole 1 is provided with a stud (16).

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