Engine box body machining clamp

Abstract

An engine box body machining clamp comprises a first clamp body and a second clamp body, the first clamp body comprises a first mounting bottom plate, first supporting plates are arranged on the front side and the rear side of the first mounting bottom plate, and a first upper box body clamp mounting plate and a first lower box body clamp mounting plate are arranged on the left side and the right side of the first mounting bottom plate correspondingly; a first upper box clamp is arranged on the upper end face of the first upper box clamp mounting plate, a first lower box clamp is arranged on the upper end face of the first lower box clamp mounting plate, the second clamp comprises a second mounting bottom plate, and second supporting plates are arranged on the front side and the rear side of the second mounting bottom plate. A second upper box clamp mounting plate and a second lower box clamp mounting plate are arranged on the left side and the right side of the second mounting bottom plate respectively, a second upper box clamp is arranged on the upper end face of the second upper box clamp mounting plate, and a second lower box clamp is arranged on the upper end face of the second lower box clamp mounting plate.

Description

Technical Field

[0001] The present invention relates to the field of engine production, and in particular to an engine case processing fixture. Background Art

[0002] The split engine case needs to be processed separately for the upper and lower cases before the case is assembled. Figure 1 、 Figure 2 As shown, the processing needs to be completed in four steps: 1. Processing the upper box surfaces 6, 5, and 3; 2. Processing the upper box surfaces 1, 4, and 2; 3. Processing the lower box surfaces 1 and 3; 4. Processing the lower box surfaces 2, 4, and 5. These four processing steps need to be performed on four four-axis machining centers, and in order to meet the processing requirements, four fixtures are needed to clamp the engine case. This method of processing the engine case makes it difficult to balance the process rhythm during the processing, resulting in a high equipment idle rate, multiple devices occupy a large space, and the frequent turnover of workpieces increases the complexity, and it is difficult to adapt to the needs of small-batch and multi-variety production. If you want to improve production efficiency, you need to concentrate the engine case on a machining center for processing, but there is currently no fixture that can clamp the upper and lower engine cases at the same time.

[0003] Therefore, a clamp is needed that can clamp the upper and lower engine cases at the same time. Summary of the Invention

[0004] The purpose of the present invention is to provide an engine case processing fixture to address the corresponding deficiencies of the prior art. The fixture can clamp the upper and lower engine cases at the same time, so that the upper and lower engine cases can be processed at the same time.

[0005] The objective of the present invention is achieved by adopting the following scheme: an engine case processing fixture, comprising a first fixture and a second fixture, the first fixture comprising a first mounting base, a first support plate is arranged on the front and rear sides of the first mounting base, the first support plate is a triangular plate, a first upper box body fixture mounting plate and a first lower box body fixture mounting plate are respectively arranged on the left and right sides of the first mounting base, the upper end surface of the first upper box body fixture mounting plate is provided with a first upper box body fixture, the upper end surface of the first lower box body fixture mounting plate is provided with a first lower box body fixture, the front and rear sides of the first upper box body fixture mounting plate and the first lower box body fixture mounting plate are respectively connected and fixed with the first support plates arranged on the front and rear sides of the first mounting base, the upper ends of the first upper box body fixture mounting plate and the first lower box body fixture mounting plate abut against each other, the angle between the first upper box body fixture mounting plate and the first mounting base is α1, the first lower box body fixture mounting plate and the first mounting base are The angle between the second upper and lower box clamps is α2, and the second clamp includes a second mounting base, a second support plate is provided on the front and rear sides of the second mounting base, and the second support plate is a triangular plate, and a second upper box clamp mounting plate and a second lower box clamp mounting plate are respectively provided on the left and right sides of the second mounting base, and a second upper box clamp is provided on the upper end surface of the second upper box clamp mounting plate, and a second lower box clamp is provided on the upper end surface of the second lower box clamp mounting plate, and the front and rear sides of the second upper box clamp mounting plate and the second lower box clamp mounting plate are respectively connected and fixed to the second support plates provided on the front and rear sides of the second mounting base, and the upper ends of the second upper box clamp mounting plate and the second lower box clamp mounting plate abut each other, and the angle between the second upper box clamp mounting plate and the second mounting base is α3, and the angle between the second lower box clamp mounting plate and the second mounting base is α4, and the first clamp and the second clamp are respectively clamped during the engine case processing.

[0006] The first upper box body clamp comprises an upper box body rear support cylinder arranged on the upper middle section of the upper end surface of the first upper box body clamp mounting plate, an auxiliary support seat arranged at the front end of the upper box body rear support cylinder, first upper box body pressing seats arranged on the left and right sides of the upper box body rear support cylinder, support blocks arranged under the pressing arms of the two first upper box body pressing seats, upper box body guide columns arranged on the left and right sides of the auxiliary support seat, an upper box body supporter arranged on the lower right side of the upper box body guide column on the right, and a first upper box body arranged on the lower left side of the upper box body guide column on the right. A clamping seat, a support block is arranged under the clamping arm of the first upper box clamping seat, an upper box rear support cylinder is arranged at the upper end of the left middle section of the first upper box clamp mounting plate, a first upper box clamping seat is arranged at the lower end of the left middle section of the first upper box clamp mounting plate, an oil pressure lever cylinder is arranged under the clamping arm of the first upper box clamping seat, an upper box lower support cylinder is arranged at the lower left end of the upper end surface of the first upper box clamp mounting plate, and a plurality of first positioning blocks for positioning the upper box of the engine are arranged on the upper end surface of the first upper box clamp mounting plate.

[0007] The first lower box body clamp includes a first lower box body clamping seat arranged at the left and right ends of the lower side of the upper end surface of the first lower box body clamp mounting plate, a first lower box body clamping seat is arranged at the right end of the upper end surface of the first lower box body clamp mounting plate, and a lower box body supporter is respectively arranged on the lower left and lower right sides of the first lower box body clamping seat, and a lower box body lower oil cylinder pad is arranged under the clamping arm of each first lower box body clamping seat, a lower box body rear support cylinder is arranged at the left end of the upper end surface of the first lower box body clamp mounting plate, and another lower box body rear support cylinder is arranged on the right side of the lower box body rear support cylinder, the cylinder heads of the two lower box body rear support cylinders are perpendicular to each other, a positioning cylinder is arranged between the two lower box body rear support cylinders, a plurality of lower box body guide blocks are arranged on the upper end surface of the first lower box body clamp mounting plate, and a through hole for weight reduction is arranged in the middle of the first lower box body clamp mounting plate.

[0008] The second upper box body clamp includes second upper box body clamping seats arranged at the upper and lower left and right ends of the upper end surface of the second upper box body clamp mounting plate, a support block is arranged under the clamping arm of the second upper box body clamping seat, upper box body positioning cylinders are arranged obliquely below the left and right sides of the two upper second upper box body clamping seats, an upper box body guide block is arranged between the two second upper box body clamping seats on the left end, the upper end surface of the second upper box body clamp mounting plate is provided with a plurality of support blocks for supporting the engine upper box body and a plurality of through holes for weight reduction, and an upper box body flow control valve is arranged on the side of the weight reduction through hole in the center of the second upper box body clamp mounting plate.

[0009] The second lower box body clamp includes second lower box body clamping seats arranged at the upper and lower left and right ends of the upper end surface of the second lower box body clamp mounting plate, a support block is arranged under the clamping arm of the second lower box body clamping seat, and lower box body positioning cylinders are arranged obliquely below the left and right sides of the two upper second lower box body clamping seats, and a lower box body guide block is arranged between the two second lower box body clamping seats on the left end, and the upper end surface of the second lower box body clamp mounting plate is provided with multiple support blocks for supporting the engine upper box body and multiple through holes for weight reduction.

[0010] The upper box body positioning oil cylinder and the lower box body positioning oil cylinder in the second fixture include a circular XY positioning oil cylinder and a diamond θ angle positioning oil cylinder.

[0011] A one-way positioning joint and a zero-point positioning joint are provided at the bottom of the first mounting base plate and the second mounting base plate.

[0012] The auxiliary support seat includes an auxiliary support base, which is a hollow base. An auxiliary support rod is arranged in the inner hole of the auxiliary support base. A compression spring is arranged between the auxiliary support rod and the auxiliary support base. The upper end of the auxiliary support rod is connected and fixed to the auxiliary support pressure arm by a bolt.

[0013] The angle between the first upper box body fixture mounting plate and the first mounting base is 35°, the angle between the first lower box body fixture mounting plate and the first mounting base is 55°, the angle between the second upper box body fixture mounting plate and the second mounting base is 40°, and the angle between the second lower box body fixture mounting plate and the second mounting base is 45°.

[0014] A lever cylinder is provided on the pressing bases of the first upper box pressing seat, the first lower box pressing seat, the second upper box pressing seat and the second lower box pressing seat in the first clamp and the second clamp, and a flow valve is provided in the lever cylinder.

[0015] The present invention provides a fixture that allows simultaneous machining of the upper and lower engine cases before assembly, improving engine case machining efficiency. The engine case can be machined on a single horizontal five-axis machining center, reducing the equipment footprint. Furthermore, the fixture has a simple structure and can be quickly redesigned to accommodate a variety of product needs, improving workpiece conversion efficiency and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the machining surface of the engine case; Figure 2 It is a schematic diagram of the remaining processing surfaces of the engine case; Figure 3 It is a schematic diagram of the structure of the present invention; Figure 4 Schematic diagram of the first upper box fixture structure; Figure 5 Schematic diagram of the first lower box fixture structure; Figure 6 This is a schematic diagram of the first installation base plate structure; Figure 7 Schematic diagram of the auxiliary support structure; Figure 8 Schematic diagram of the second upper box fixture structure; Figure 9 Schematic diagram of the second lower box fixture structure; Figure 10 This is a schematic diagram of the second installation base plate structure. DETAILED DESCRIPTION

[0017] like Figures 3 to 10As shown, an engine case processing fixture includes a first fixture and a second fixture. The first fixture is installed on the first exchange workbench of the horizontal five-axis machining center, and the second fixture is installed on the second exchange workbench of the horizontal five-axis machining center. The first fixture includes a first mounting base 11, and first support plates 12 are set on the front and rear sides of the first mounting base 11. The first support plate 12 is a triangular plate. The left and right sides of the first mounting base 11 are respectively provided with a first upper box fixture mounting plate 13 and a first lower box fixture mounting plate The first upper box body clamp is provided on the upper end surface of the first upper box body clamp mounting plate 13, and the first lower box body clamp is provided on the upper end surface of the first lower box body clamp mounting plate 14. The front and rear sides of the first upper box body clamp mounting plate 13 and the first lower box body clamp mounting plate 14 are respectively connected and fixed to the first support plates 12 provided on the front and rear sides of the first mounting base 11. The upper ends of the first upper box body clamp mounting plate 13 and the first lower box body clamp mounting plate 14 abut against each other. The first upper box body clamp mounting plate 13 and the first mounting base The angle between the plate 11 is 35 degrees, the angle between the first lower box fixture mounting plate 14 and the first mounting base plate 11 is 55 degrees, the second fixture includes a second mounting base plate 21, and second support plates 22 are set on the front and rear sides of the second mounting base plate 21. The second support plate 22 is a triangular plate. The left and right sides of the second mounting base plate 21 are respectively provided with a second upper box fixture mounting plate 23 and a second lower box fixture mounting plate 24. The upper end surface of the second upper box fixture mounting plate 23 is provided with a second upper box fixture, and the second lower box fixture is provided with a second lower box fixture. The upper end surface of the mounting plate 24 is provided with a second lower box body clamp. The front and rear sides of the second upper box body clamp mounting plate 23 and the second lower box body clamp mounting plate 24 are respectively connected and fixed to the second support plates 22 provided on the front and rear sides of the second mounting base plate 21. The upper ends of the second upper box body clamp mounting plate 23 and the second lower box body clamp mounting plate 24 abut against each other. The angle between the second upper box body clamp mounting plate 23 and the second mounting base plate 21 is 40°, and the angle between the second lower box body clamp mounting plate 24 and the second mounting base plate 21 is 45°. The first clamp and the second clamp are respectively clamped during the processing of the engine case. A one-way positioning joint 2 and a zero-point positioning joint 3 are provided at the bottom of the first mounting base plate 11 and the second mounting base plate 21, which can realize the rapid replacement, positioning and clamping of the clamp. The first clamp and the second clamp are arranged in a triangle so that the clamp will not interfere with the machine tool and avoid interference with the workpiece when the tool feeds.

[0018] The first upper box body clamp includes an upper box body rear support cylinder 15 provided on the upper middle section of the upper end surface of the first upper box body clamp mounting plate 13, and an auxiliary support seat 128 is provided at the front end of the upper box body rear support cylinder 15. The auxiliary support seat 128 includes an auxiliary support base 4, and the auxiliary support base 4 is a hollow base. An auxiliary support rod 5 is provided in the inner hole of the auxiliary support base 4, and a compression spring 6 is provided between the auxiliary support rod 5 and the auxiliary support base 4. The upper end of the auxiliary support rod 5 is connected and fixed to the auxiliary support pressure arm 7 by a bolt. The auxiliary support can prevent the workpiece from shifting under the action of gravity before the cylinder is pressed. The left and right sides of the upper box rear support cylinder 15 are respectively provided with the first upper box pressing seat 16, and support blocks are provided under the pressing arms of the two first upper box pressing seats 16. Upper box guide columns 17 are provided on the left and right sides of the auxiliary support seat 128, and an upper box supporter 18 is provided on the lower right side of the upper box guide column 17 on the right side, and the first upper box pressing seat 16 is provided on the lower left side of the upper box guide column 17 on the right side, and a support block is provided under the pressing arm of the first upper box pressing seat 16. The upper box rear support cylinder 15 is provided at the upper middle end of the left middle section of the first upper box clamp mounting plate 13, and the first upper box pressing seat 16 is provided at the lower middle end of the left middle section of the first upper box clamp mounting plate 13, and an oil pressure lever cylinder 19 is provided under the pressing arm of the first upper box pressing seat 16, and an upper box lower support cylinder 120 is provided at the lower left end of the upper end surface of the first upper box clamp mounting plate 13. The upper end surface is provided with a plurality of first positioning blocks 121 for positioning the upper case of the engine. The first lower case clamp includes first lower case pressing seats 122 arranged at the left and right ends of the lower side of the upper end surface of the first lower case clamp mounting plate 14, the first lower case pressing seat 122 is arranged at the right end of the upper end surface of the first lower case clamp mounting plate 14, and lower case supports 124 are respectively arranged on the lower left and right sides of the first lower case pressing seat 122, and lower case lower cylinder pads 126 are arranged under the pressing arms of each first lower case pressing seat 122. A lower box rear support cylinder 125 is set on the upper left end of the upper end surface of the box clamp mounting plate 14, and another lower box rear support cylinder 125 is set on the right side of the lower box rear support cylinder 125. The cylinder heads of the two lower box rear support cylinders 125 are perpendicular to each other, and a positioning cylinder 127 is set between the two lower box rear support cylinders 125. A plurality of lower box guide blocks 123 are set on the upper end surface of the first lower box clamp mounting plate 14, and a through hole for weight reduction is set in the middle of the first lower box clamp mounting plate 14.The second upper box body clamp includes a second upper box body clamping seat 25 arranged at the upper and lower left and right ends of the upper end surface of the second upper box body clamp mounting plate 23, a support block is arranged under the clamping arm of the second upper box body clamping seat 25, an upper box body positioning cylinder 26 is arranged obliquely below the left and right sides of the two upper second upper box body clamping seats 25, an upper box body guide block 27 is arranged between the two second upper box body clamping seats 25 on the left end, the upper end surface of the second upper box body clamp mounting plate 23 is provided with a plurality of support blocks for supporting the engine upper box body and a plurality of through holes for weight reduction, and an upper box body flow control valve 211 is arranged on the side of the weight reduction through hole in the center of the second upper box body clamp mounting plate 23. The second lower box body fixture includes second lower box body pressing seats 28 disposed on the upper and lower left and right ends of the upper end surface of the second lower box body fixture mounting plate 24. Support blocks are disposed below the pressing arms of the second lower box body pressing seats 28. Lower box body positioning cylinders 29 are disposed obliquely below the left and right sides of the two upper second lower box body pressing seats 28. A lower box body guide block 210 is disposed between the two left second lower box body pressing seats 28. The upper end surface of the second lower box body fixture mounting plate 24 is provided with multiple support blocks for supporting the engine upper box body and multiple through holes for weight reduction. The upper box body positioning cylinders 26 and lower box body positioning cylinders 29 in the second fixture include circular XY positioning cylinders and diamond θ angle positioning cylinders. In order to improve the machining accuracy of the engine box body, gapless positioning cylinders are used, and the repeatability positioning accuracy is less than 0.005mm. A lever cylinder 8 is installed on the pressing base of the first upper box pressing seat 16, the first lower box pressing seat 122, the second upper box pressing seat 25, and the second lower box pressing seat 28 in the first and second clamps. A flow valve is installed in the lever cylinder 8. When positioning the positioning cylinders, the flow valves are adjusted first. The circular positioning cylinder is opened for centering, followed by the diamond-shaped cylinder, which is opened to a fixed angle. Finally, the lever cylinder performs the pressing.

[0019] When processing the engine case, the upper case and the lower case of the engine case can each be processed simultaneously on a machining center. After a portion of the processing surface of the engine case is processed on the first fixture, the engine case is replaced and clamped on the second fixture to process the remaining processing surfaces. When the first fixture is performing clamping processing, the workpiece on the second fixture can be replaced. Similarly, when the second fixture is performing clamping processing, the workpiece on the first fixture can be replaced, saving time for workpiece replacement and preventing the machine from being idle due to inconsistent processing time. The traditional processing procedure requires four pairs of fixtures and four steps to process an engine, while this patent can realize two pairs of fixtures and two steps to process the engine case, greatly reducing the processing time.

[0020] This fixture allows the engine case processing steps to be merged, shortening the processing cycle by more than 40%, achieving 100% equipment utilization, reducing the processing equipment footprint by 60%, and lowering factory costs.

[0021] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications made to the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the scope of protection of the present invention.

Claims

1. An engine case processing fixture, characterized by: The invention comprises a first clamp and a second clamp, wherein the first clamp comprises a first mounting base plate (11), a first support plate (12) is provided on the front and rear sides of the first mounting base plate (11), and the first support plate (12) is a triangular plate, a first upper box clamp mounting plate (13) and a first lower box clamp mounting plate (14) are provided on the left and right sides of the first mounting base plate (11), respectively, a first upper box clamp is provided on the upper end surface of the first upper box clamp mounting plate (13), and a first lower box clamp is provided on the upper end surface of the first lower box clamp mounting plate (14). The front and rear sides of the first upper box body fixture mounting plate (13) and the first lower box body fixture mounting plate (14) are respectively connected and fixed to the first support plates (12) provided on the front and rear sides of the first mounting base plate (11). The upper ends of the first upper box body fixture mounting plate (13) and the first lower box body fixture mounting plate (14) are in contact with each other. The angle between the first upper box body fixture mounting plate (13) and the first mounting base plate (11) is α1, and the angle between the first lower box body fixture mounting plate (14) and the first mounting base plate (11) is α2. The second fixture package The second mounting base (21) includes a second support plate (22) provided on the front and rear sides of the second mounting base (21), the second support plate (22) being a triangular plate, a second upper box body fixture mounting plate (23) and a second lower box body fixture mounting plate (24) being provided on the left and right sides of the second mounting base (21), the upper end surface of the second upper box body fixture mounting plate (23) being provided with a second upper box body fixture, the upper end surface of the second lower box body fixture mounting plate (24) being provided with a second lower box body fixture, the second upper box body fixture mounting plate (23) and the second lower box body fixture mounting plate (24) being provided with a second lower box body fixture, The front and rear sides of the box body clamp mounting plate (24) are respectively connected and fixed to the second support plates (22) provided on the front and rear sides of the second mounting base plate (21); the upper ends of the second upper box body clamp mounting plate (23) and the second lower box body clamp mounting plate (24) abut against each other; the included angle between the second upper box body clamp mounting plate (23) and the second mounting base plate (21) is α3; the included angle between the second lower box body clamp mounting plate (24) and the second mounting base plate (21) is α4; the first clamp and the second clamp are respectively clamped during the processing of the engine box body.

2. The engine case processing fixture according to claim 1, characterized in that: The first upper box body fixture comprises an upper box body rear support cylinder (15) provided on the upper middle section of the upper end surface of the first upper box body fixture mounting plate (13), an auxiliary support seat (128) provided at the front end of the upper box body rear support cylinder (15), first upper box body pressing seats (16) provided on the left and right sides of the upper box body rear support cylinder (15), support blocks provided below the pressing arms of the two first upper box body pressing seats (16), upper box body guide columns (17) provided on the left and right sides of the auxiliary support seat (128), an upper box body supporter (18) provided on the right lower side of the upper box body guide column (17) on the right, and the upper box body guide column (17) provided on the right. A first upper box pressing seat (16) is provided on the lower left side of (17), a support block is provided below the pressing arm of the first upper box pressing seat (16), an upper box rear support cylinder (15) is provided on the upper end of the left middle section of the first upper box clamp mounting plate (13), a first upper box pressing seat (16) is provided on the lower end of the left middle section of the first upper box clamp mounting plate (13), an oil pressure lever cylinder (19) is provided below the pressing arm of the first upper box pressing seat (16), an upper box lower support cylinder (120) is provided on the left end of the lower side of the upper end surface of the first upper box clamp mounting plate (13), and a plurality of first positioning blocks (121) for positioning the engine upper box are provided on the upper end surface of the first upper box clamp mounting plate (13).

3. The engine case processing fixture according to claim 1, characterized in that: The first lower box body clamp comprises a first lower box body pressing seat (122) arranged at the left and right ends of the lower side of the upper end surface of the first lower box body clamp mounting plate (14), the first lower box body pressing seat (122) is arranged at the right end of the upper end surface of the first lower box body clamp mounting plate (14), a lower box body supporter (124) is respectively arranged on the lower left and lower right sides of the first lower box body pressing seat (122), a lower box body lower cylinder pad (126) is arranged under the pressing arm of each first lower box body pressing seat (122), and the first lower box body is provided with a plurality of lower box body supporters (124). A lower box rear support cylinder (125) is provided at the upper left end of the upper end surface of the fixture mounting plate (14), another lower box rear support cylinder (125) is provided on the right side of the lower box rear support cylinder (125), the cylinder heads of the two lower box rear support cylinders (125) are perpendicular to each other, a positioning cylinder (127) is provided between the two lower box rear support cylinders (125), a plurality of lower box guide blocks (123) are provided on the upper end surface of the first lower box fixture mounting plate (14), and a through hole for reducing weight is provided in the middle of the first lower box fixture mounting plate (14).

4. The engine case processing fixture according to claim 1, characterized in that: The second upper box body clamp comprises a second upper box body pressing seat (25) arranged at the upper and lower left and right ends of the upper end surface of the second upper box body clamp mounting plate (23); a support block is arranged below the pressing arm of the second upper box body pressing seat (25); an upper box body positioning cylinder (26) is arranged obliquely below the left and right sides of the two upper second upper box body pressing seats (25); an upper box body guide block (27) is arranged between the two left end second upper box body pressing seats (25); a plurality of support blocks for supporting the engine upper box body and a plurality of through holes for weight reduction are arranged on the upper end surface of the second upper box body clamp mounting plate (23); and an upper box body flow control valve (211) is arranged on the side of the weight reduction through hole in the center of the second upper box body clamp mounting plate (23).

5. The engine case processing fixture according to claim 1, characterized in that: The second lower box body clamp comprises a second lower box body pressing seat (28) arranged at the upper and lower left and right ends of the upper end surface of the second lower box body clamp mounting plate (24); a support block is arranged below the pressing arm of the second lower box body pressing seat (28); a lower box body positioning cylinder (29) is arranged obliquely below the left and right sides of the two upper second lower box body pressing seats (28); a lower box body guide block (210) is arranged between the two left end second lower box body pressing seats (28); and a plurality of support blocks for supporting the engine upper box body and a plurality of through holes for reducing weight are arranged on the upper end surface of the second lower box body clamp mounting plate (24).

6. The engine case processing fixture according to claim 1, characterized in that: The upper box body positioning oil cylinder (26) and the lower box body positioning oil cylinder (29) in the second fixture include a circular XY positioning oil cylinder and a rhombus θ angle positioning oil cylinder.

7. The engine case processing fixture according to claim 1, characterized in that: A one-way positioning joint (2) and a zero-point positioning joint (3) are provided at the bottom of the first mounting base plate (11) and the second mounting base plate (21).

8. The engine case processing fixture according to claim 2, characterized in that: The auxiliary support seat (128) includes an auxiliary support base (4), the auxiliary support base (4) is a hollow base, an auxiliary support rod (5) is arranged in the inner hole of the auxiliary support base (4), a compression spring (6) is arranged between the auxiliary support rod (5) and the auxiliary support base (4), and the upper end of the auxiliary support rod (5) is connected and fixed to the auxiliary support pressure arm (7) by a bolt.

9. The engine case processing fixture according to claim 1, characterized in that: The included angle between the first upper box body fixture mounting plate (13) and the first mounting base plate (11) is 35°, the included angle between the first lower box body fixture mounting plate (14) and the first mounting base plate (11) is 55°, the included angle between the second upper box body fixture mounting plate (23) and the second mounting base plate (21) is 40°, and the included angle between the second lower box body fixture mounting plate (24) and the second mounting base plate (21) is 45°.

10. The engine case processing fixture according to claim 1, characterized in that: A lever oil cylinder (8) is provided on the pressing bases of the first upper box pressing seat (16), the first lower box pressing seat (122), the second upper box pressing seat (25), and the second lower box pressing seat (28) in the first clamp and the second clamp, and a flow valve is provided in the lever oil cylinder (8).

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