Special-shaped workpiece machining method

Abstract

The invention discloses a special-shaped workpiece machining method, relates to the technical field of workpiece machining, and aims at solving the problems that in the prior art, special-shaped workpiece machining steps are tedious, and machining efficiency is low. According to the special-shaped workpiece machining method, a special-shaped workpiece fixing device is adopted, a workpiece comprises a bottom end frame, a top end frame and an opening end frame, and the special-shaped workpiece machining method comprises the following steps that S1, the workpiece fixing device is adjusted; s2, fixing an open end frame; s3, the workpiece is fastened; s4, checking the fixing stability; s5, the workpiece is machined; and S6, the workpiece is separated from the special-shaped workpiece fixing device. According to the invention, the workpiece can be quickly aligned and positioned, the manual error is reduced, and the processing efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of workpiece processing, and in particular to a method for processing a special-shaped workpiece. Background Art

[0002] Special-shaped workpieces refer to workpieces with irregular outer surfaces. They usually adopt non-traditional geometric shapes and may have special shapes or surfaces such as curved surfaces, asymmetric contours, and uneven shapes. They are widely used in aerospace, machine manufacturing and other fields.

[0003] The basic structural form of special-shaped workpieces is that fixed circular end frames are set at both ends, and special-shaped surface structures are set between the end frames. The special-shaped surface structures usually have the characteristics of thin walls and irregular shapes, which are difficult to clamp and bring difficulties to the processing of special-shaped workpieces.

[0004] In the prior art, the processing of special-shaped workpieces requires technicians to measure and mark, determine the processing benchmark, and align them through manual knocking and other methods. The operation is complicated, the steps are cumbersome, the processing time is long, and the technicians have high experience requirements, which seriously affects the processing efficiency of special-shaped workpieces. Summary of the invention

[0005] In view of the above analysis, the present invention aims to provide a method for processing special-shaped workpieces to solve the problems of complicated processing steps and low processing efficiency in the prior art.

[0006] The purpose of the present invention is mainly achieved through the following technical solutions:

[0007] The present invention discloses a method for processing a special-shaped workpiece, which adopts a special-shaped workpiece fixing device, wherein the workpiece comprises a bottom end frame, a top end frame and an open end frame, and comprises the following steps:

[0008] S1: Adjust the workpiece fixture;

[0009] S2: fixed open end frame;

[0010] S3: Fasten the workpiece;

[0011] Further, the special-shaped workpiece fixing device includes a top plate, and step S3 specifically includes:

[0012] S31: Adjust the top plate.

[0013] Further, in step S31, the special-shaped workpiece fixing device includes a tension connector.

[0014] Furthermore, a connection hole is arranged on the top plate.

[0015] Furthermore, in step S31, the top plate is placed on the top frame so that the tension connector enters the connection hole.

[0016] Furthermore, the special-shaped workpiece fixing device also includes a base, and the base also includes a bottom plate and a positioning block, and the positioning block is connected to the bottom plate.

[0017] Furthermore, the tension connection piece includes a tension rod and a tension nut, one end of the tension rod is connected to the base, and the other end enters the connection hole and is threadedly connected to the tension nut.

[0018] Furthermore, the special-shaped workpiece fixing device also includes a pressing plate assembly, and the pressing plate assembly is arranged on the positioning block.

[0019] Furthermore, the method further comprises the following steps:

[0020] S4: Check the stability of fixation.

[0021] Furthermore, the method further comprises the following steps:

[0022] S5: processing workpiece;

[0023] S6: Separate the workpiece from the special-shaped workpiece fixture.

[0024] Furthermore, the base also includes a first adjusting member, which is arranged in the positioning block. Multiple arc plates form a circular structure. The first adjusting member includes a bottom gear plate, a first driving gear and a first driving rod. The bottom gear plate and the first driving gear are connected to the positioning block through a bearing seat. The first driving gear is meshed with the bottom gear plate. The first driving rod is connected to the first driving gear. An arc groove is arranged on the bottom gear plate. A support rod and a sliding end are arranged on the arc plate. The arc plate is connected to the sliding end through the support rod, and the sliding end is arranged in the arc groove.

[0025] Furthermore, the top plate also includes an arc-shaped positioning block and a second adjusting member, and a plurality of arc-shaped positioning blocks form a circular structure. The second adjusting member includes a top gear plate, a second driving gear, a second driving rod and a crank. The top gear plate and the second driving gear are connected to the top plate through a bearing seat, the second driving gear is meshed with the top gear plate, the second driving rod is connected to the second driving gear, and the second driving rod passes through the top plate and is connected to the crank. A positioning arc groove is arranged on the top gear plate, and the number of the positioning arc grooves is the same as that of the arc-shaped positioning block. A connecting rod and a moving end are arranged on the arc-shaped positioning block. The arc-shaped positioning block is connected to the moving end through the connecting rod, and the moving end is arranged in the positioning arc groove. When the top gear plate rotates, the moving end moves along the positioning arc groove.

[0026] Further, in step S4, the special-shaped workpiece fixing device also includes a fixed detection component, which includes a pressing ball, a cylinder, a movable shell, a two-way pressure plate, a support frame and a support spring. The movable shell is arranged in the base plate, and the top surface of the movable shell is coplanar with the base plate. The pressing ball, the cylinder, the two-way pressure plate, the support frame and the support spring are arranged in the movable shell, the support frame is fixedly connected to the movable shell, the two-way pressure plate is hinged to the movable shell, one end of the two-way pressure plate is connected to the pressing ball, and the other end is connected to the cylinder. A spherical hole and a cylindrical hole are arranged on the movable shell, the pressing ball can protrude out of the movable shell from the spherical hole, the cylinder can protrude out of the movable shell from the cylindrical hole, and a support spring is arranged at one end of the two-way pressure plate connected to the pressing ball, and the support spring enables the pressing ball to protrude from the spherical hole.

[0027] Further, step S6 specifically includes:

[0028] S61: Remove the top plate;

[0029] S62: releasing the fixation of the open end frame;

[0030] S63: Separating the workpiece.

[0031] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0032] (1) The special-shaped workpiece processing method provided by the present invention can quickly align and position the workpiece by adopting the special-shaped workpiece fixing device, and the first driving gear can be rotated by rotating the first driving rod, thereby driving the bottom gear plate to rotate. When the bottom gear plate rotates, the sliding end moves along the arc-shaped sliding groove, driving the arc-shaped plate to move with the sliding end, so that the circular structure composed of the arc-shaped plates is enlarged or reduced, so that the arc-shaped plate is closely attached to the inner wall of the bottom end frame, so that the arc-shaped plate can cooperate with the bottom end frames of different workpieces to align the workpiece; rotating the crank can drive the second driving rod to rotate, so that the second driving gear drives the top gear plate to rotate. When the top gear plate rotates, the moving end moves along the positioning arc groove, driving the arc-shaped positioning block to move with the moving end, so that the circular structure composed of the arc-shaped positioning blocks is enlarged or reduced, so that the arc-shaped plate is closely attached to the inner wall of the top end frame, so that the special-shaped workpiece fixing device can align workpieces of different diameters, and has universality. The workpiece can be aligned by the arc plate and the arc positioning block, so there is no need to align the workpiece by manual marking, knocking and other methods, which saves a lot of manpower. The operation is simple and the workpiece can be quickly aligned and positioned, thereby improving processing efficiency.

[0033] (2) In the method for processing special-shaped workpieces provided by the present invention, in step S4, the stability of the workpiece fixation is checked, and the tightening nut is adjusted to fix the workpiece firmly. Step S4 can improve the stability and safety of the workpiece fixation of the special-shaped workpiece fixing device, thereby reducing the risk of damage to the workpiece due to unstable fixation. By setting a fixed detection component, the stability of the workpiece fixation can be quickly detected, saving manpower, improving processing efficiency, and shortening the stability detection time of the workpiece fixation. When testing the stability of the workpiece fixation, the workpiece is tilted. If the fixation of the workpiece is not stable, the workpiece is displaced under the action of the tilt, so that there is a gap between the bottom frame and the bottom plate. The pressing ball at the gap protrudes from the spherical hole under the action of the support spring, so that the column enters the cylindrical hole. The technician only needs to observe whether the column protrudes from the cylindrical hole to determine the fixation of the workpiece, thereby adjusting the tightening nut. The operation is simple and easy to observe, which can save manpower and improve processing efficiency.

[0034] (3) The special-shaped workpiece processing method provided by the present invention improves the efficiency of fixing and aligning the special-shaped workpiece by adopting the special-shaped workpiece fixing device, saving manpower; fixing and aligning the workpiece by the arc plate and the arc positioning block improves the accuracy of workpiece alignment and fixing, no manual measurement is required, manual errors are reduced, and the precision of special-shaped workpiece processing can be improved. The stability of workpiece fixation is further improved by fixing the open end frame by the pressure plate assembly. The unstable fixed parts can be adjusted by step S4, which improves the safety and stability of special-shaped workpiece processing. The special-shaped workpiece fixing device can be recycled by step S6 for easy use in the next processing, saving costs. The special-shaped workpiece processing method of the present invention can save a lot of manual operations, does not require line measurement, reduces manual errors, improves processing efficiency, can effectively improve the safety and stability of special-shaped workpiece processing, and can adapt to special-shaped workpieces of different diameters, with good economy.

[0035] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the embodiments of the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings are only for the purpose of illustrating the particular invention and are not to be considered as limiting the invention. The same reference symbols denote the same components throughout the accompanying drawings.

[0037] Figure 1 It is a schematic flow chart of the method for processing a special-shaped workpiece of the present invention;

[0038] Figure 2 It is a schematic diagram of the overall structure of the special-shaped workpiece fixing device of the present invention;

[0039] Figure 3 It is a structural schematic diagram of the base of the present invention;

[0040] Figure 4 It is a structural schematic diagram of the rotary tank of the present invention;

[0041] Figure 5 It is a structural schematic diagram of the pressing plate assembly of the present invention;

[0042] Figure 6 It is a structural schematic diagram of placing a pad of the present invention;

[0043] Figure 7 It is a schematic structural diagram of the top plate of the present invention;

[0044] Figure 8 It is a structural schematic diagram of a fixed detection component of the present invention;

[0045] Fig. 9 It is a schematic diagram of the internal structure of the fixed detection component of the present invention.

[0046] Reference numerals:

[0047] 1-base; 11-arc plate; 111-support rod; 112-sliding end; 12-bottom plate; 121-rotating groove; 122-sliding groove; 13-first adjusting member; 131-bottom gear plate; 1311-arc sliding groove; 132-first driving gear; 133-first driving rod; 134-rotating handle; 14-positioning block; 2-top plate; 21-connecting hole; 22-arc positioning block; 221-connecting rod; 222-moving end; 23-second adjusting member; 231-top gear plate; 2311- Positioning arc groove; 232-second driving gear; 233-second driving rod; 234-crank handle; 3-tension connector; 31-tension rod; 32-tightening nut; 4-pressure plate assembly; 41-fixing rod; 42-fixing bolt; 43-tightening plate; 5-fixed detection assembly; 51-pressing ball; 52-column; 53-moving shell; 54-bidirectional pressure plate; 55-support frame; 56-support spring; 6-placing pad; 7-workpiece; 71-bottom end frame; 72-top end frame; 73-open end frame. DETAILED DESCRIPTION

[0048] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used to explain the principles of the present invention together with the present invention.

[0049] This embodiment provides a method for processing a special-shaped workpiece, using a special-shaped workpiece fixing device, such as Figure 1 As shown, the following steps are included:

[0050] S1: Adjust the workpiece fixture;

[0051] S2: fix the open end frame 73;

[0052] S3: Fasten the workpiece 7;

[0053] S4: Check the stability of fixation;

[0054] S5: processing workpiece 7;

[0055] S6: Separate the workpiece 7 from the special-shaped workpiece fixing device.

[0056] like Figure 2 As shown, the workpiece 7 includes a bottom end frame 71, a top end frame 72 and an open end frame 73, and the special-shaped workpiece fixing device includes a base 1, a top plate 2 and a tension connector 3. The workpiece 7 is arranged between the top plate 2 and the base 1, and the base 1 and the top plate 2 are connected by the tension connector 3, so that the top plate 2 presses the workpiece 7, thereby fixing the workpiece 7.

[0057] Furthermore, if Figure 3 As shown, the base 1 includes an arc plate 11, a bottom plate 12, a first adjusting member 13 and a positioning block 14. The arc plate 11 is provided in plurality, and the plurality of arc plates 11 form a circular structure. The arc plate 11 is connected to the bottom plate 12, the arc plate 11 is connected to the first adjusting member 13, the positioning block 14 is connected to the bottom plate 12, the first adjusting member 13 is provided in the positioning block 14, and the position of the arc plate 11 can be adjusted by the first adjusting member 13. The tension connector 3 is provided on the positioning block 14.

[0058] Preferably, a slider is provided on the arc plate 11 , and a slide rail is provided on the bottom plate 12 . The arc plate 11 and the bottom plate 12 are connected via the slider and the slide rail, thereby increasing the stability of the movement of the arc plate 11 .

[0059] In step S1 , specifically, the workpiece 7 is placed on the base 1 , and the position of the arc plate 11 is adjusted by the first adjusting member 13 so that the arc plate 11 is closely attached to the inner wall of the bottom end frame 71 on the workpiece 7 , so as to align the workpiece 7 .

[0060] Furthermore, the first adjusting member 13 includes a bottom gear plate 131, a first driving gear 132 and a first driving rod 133. The bottom gear plate 131 and the first driving gear 132 are connected to the positioning block 14 through a bearing seat. The first driving gear 132 is meshed with the bottom gear plate 131. The first driving rod 133 is connected to the first driving gear 132. By rotating the first driving rod 133, the first driving gear 132 can be rotated, thereby driving the bottom gear plate 131 to rotate. An arc-shaped slot 1311 is arranged on the bottom gear plate 131, and the number of the arc-shaped slots 1311 is the same as that of the arc-shaped plate 11. A support rod 111 and a sliding end 112 are arranged on the arc-shaped plate 11. The arc-shaped plate 11 is connected to the sliding end 112 through the support rod 111, and the sliding end 112 is arranged in the arc-shaped slot 1311. When the bottom gear plate 131 rotates, the sliding end 112 moves along the arc-shaped slot 1311, driving the arc-shaped plate 11 to move with the sliding end 112, so that the circular structure formed by the arc-shaped plate 11 increases or decreases, thereby making the arc-shaped plate 11 close to the inner wall of the bottom end frame 71.

[0061] Preferably, a plurality of step positioning pins are provided on the base 1 , and the positions of the step positioning pins correspond to the positions of the pin holes on the workpiece 7 , so as to position the workpiece 7 in the circumferential direction.

[0062] For example, Figure 4 As shown, a rotation groove 121 is further provided on the bottom plate 12, a rotation handle 134 is provided in the rotation groove 121, a first driving rod 133 enters the rotation groove 121 and is connected to the rotation handle 134, and rotating the rotation handle 134 can drive the first driving rod 133 to rotate, thereby rotating the bottom gear plate 131 to adjust the arc plate 11. It is worth noting that the rotation handle 134 is located in the rotation groove 121, and the height of the rotation handle 134 is less than the depth of the rotation groove 121, so as to prevent the rotation handle 134 from affecting the flatness of the bottom plate 12.

[0063] Preferably, Figure 6 As shown, the special-shaped workpiece fixing device also includes a placement pad 6, which is arranged around the positioning block 14 and connected to the bottom plate 12 for padding the workpiece 7.

[0064] Furthermore, if Figure 5 As shown, the special-shaped workpiece fixing device further includes a pressing plate assembly 4 , which is disposed on the positioning block 14 .

[0065] The pressure plate assembly 4 includes a fixing rod 41, a fixing bolt 42 and a clamping plate 43. A fixing groove is set on the clamping plate 43. One end of the fixing rod 41 is connected to the positioning block 14, and the other end passes through the fixing groove and is threadedly connected to the fixing bolt 42. Tightening the fixing bolt 42 can fix the position of the clamping plate 43.

[0066] In step S2 , specifically, the pressing plate 43 is brought into close contact with the open end frame 73 , and the fixing bolts 42 are rotated to cause the pressing plate 43 to press the open end frame 73 .

[0067] Furthermore, step S3 specifically includes:

[0068] S31: Adjust the top plate 2;

[0069] S32: Fix the connection between the top plate 2 and the workpiece 7.

[0070] Specifically, Figure 7 As shown, a connecting hole 21, an arc-shaped positioning block 22 and a second adjusting member 23 are provided on the top plate 2. The connecting hole 21 is provided on the top plate 2, and the connecting hole 21 is used to connect the tension connecting member 3. A plurality of arc-shaped positioning blocks 22 are provided, and a plurality of arc-shaped positioning blocks 22 form a circular structure. The arc-shaped positioning block 22 is connected to the second adjusting member 23, and the position of the arc-shaped positioning block 22 can be adjusted by the second adjusting member 23.

[0071] In step S31 , specifically, the top plate 2 is placed on the top frame 72 of the workpiece 7 , the tension connector 3 enters the connection hole 21 , and the second adjustment member 23 is adjusted to make the arc-shaped positioning block 22 close to the inner wall of the top frame 72 .

[0072] Furthermore, the second adjusting member 23 includes a top gear plate 231, a second driving gear 232, a second driving rod 233 and a crank 234. The top gear plate 231 and the second driving gear 232 are connected to the top plate 2 through a bearing seat. The second driving gear 232 is meshed with the top gear plate 231. The second driving rod 233 is connected to the second driving gear 232. Rotating the second driving rod 233 can rotate the second driving gear 232. The second driving rod 233 passes through the top plate 2 and is connected to the crank 234. Rotating the crank 234 can drive the second driving rod 233 to rotate, thereby causing the second driving gear 232 to drive the top gear plate 231 to rotate. A positioning arc groove 2311 is set on the top gear plate 231, and the number of the positioning arc grooves 2311 is the same as that of the arc positioning block 22. A connecting rod 221 and a movable end 222 are set on the arc positioning block 22. The arc positioning block 22 is connected to the movable end 222 through the connecting rod 221, and the movable end 222 is set in the positioning arc groove 2311. When the top gear plate 231 rotates, the movable end 222 moves along the positioning arc groove 2311, driving the arc positioning block 22 to move with the movable end 222, so that the circular structure formed by the arc positioning block 22 is enlarged or reduced, so that the arc positioning block 22 is close to the inner wall of the top frame 72.

[0073] Furthermore, if Figure 2 As shown, the tension connector 3 includes a tension rod 31 and a tightening nut 32 . One end of the tension rod 31 is connected to the positioning block 14 , and the other end enters the connecting hole 21 and is threadedly connected to the tightening nut 32 .

[0074] In step S32 , specifically, the tension nut 32 is connected to the tension rod 31 , so that the top plate 2 is pressed against the top frame 72 , thereby fixing the position of the workpiece 7 through the top plate 2 and the base 1 .

[0075] In step S4, specifically, the stability of the fixation of the workpiece 7 is checked, and the tightening nut 32 is adjusted to ensure that the workpiece 7 is firmly fixed.

[0076] For example, Figure 8-Figure 9 As shown, the special-shaped workpiece fixing device also includes a fixed detection component 5, which includes a pressing ball 51, a column 52, a moving shell 53, a two-way pressure plate 54, a support frame 55 and a support spring 56. The moving shell 53 is arranged in the bottom plate 12, and the top surface of the moving shell 53 is coplanar with the bottom plate 12. The pressing ball 51, the column 52, the two-way pressure plate 54, the support frame 55 and the support spring 56 are arranged in the moving shell 53, and the support frame 55 is fixedly connected to the moving shell 53. The two-way pressure plate 54 is connected to the moving shell 53. The movable shell 53 is hinged, one end of the bidirectional pressure plate 54 is connected to the pressing ball 51, and the other end is connected to the column 52. The movable shell 53 is provided with a spherical hole and a cylindrical hole. The spherical hole cooperates with the pressing ball 51 so that the pressing ball 51 can protrude from the spherical hole to the movable shell 53. The cylindrical hole cooperates with the column 52 so that the column 52 can protrude from the cylindrical hole to the movable shell 53. A support spring 56 is provided at one end of the bidirectional pressure plate 54 connected to the pressing ball 51. The support spring 56 enables the pressing ball 51 to protrude from the spherical hole. The pressing ball 51 is arranged on the side close to the arc plate 11, and the column 52 is arranged on the side away from the arc plate 11.

[0077] Preferably, a sliding groove 122 is provided on the bottom plate 12 , and the movable shell 53 is disposed in the sliding groove 122 and can move along the sliding groove 122 , so that the fixed detection assembly 5 can be adjusted according to the position of the arc plate 11 .

[0078] Preferably, a plurality of fixing detection components 5 are provided, so as to increase the inspection accuracy of the fixing stability of the workpiece 7 .

[0079] When fixing the workpiece 7, when the inner wall of the bottom frame 71 is close to the arc plate 11, the bottom frame 71 squeezes the pressing ball 51, so that the pressing ball 51 compresses the supporting spring 56 and enters the spherical hole, so that one end of the column 52 set on the bidirectional pressure plate 54 is lifted, and the column 52 protrudes from the cylindrical hole, prompting the technician that the workpiece 7 is firmly fixed.

[0080] When testing the stability of the fixation of the workpiece 7, the workpiece 7 is tilted. If the fixation of the workpiece 7 is not stable, the workpiece 7 will be displaced due to the tilting action, so that there is a gap between the bottom frame 71 and the bottom plate 12. The pressing ball 51 at the gap protrudes out of the spherical hole under the action of the support spring 56, allowing the column 52 to enter the cylindrical hole, thereby prompting the technician to further fix the workpiece 7.

[0081] In step S5, specifically, the special-shaped workpiece fixing device that fixes the workpiece 7 is placed on a processing platform of a processing machine, and the workpiece 7 is processed by the processing machine.

[0082] Furthermore, step S6 specifically includes:

[0083] S61: Remove the top plate 2;

[0084] S62: releasing the fixation of the opening end frame 73;

[0085] S63: Separate the workpiece 7.

[0086] In step S61, specifically, the tightening nut 32 is rotated to separate the tightening nut 32 from the tension rod 31, and the crank is turned to move the arc-shaped positioning block 22 away from the top frame 72, and the top plate 2 is removed by the lifting device.

[0087] In step S62 , specifically, the fixing bolt 42 is loosened, and the pressing plate 43 is moved in a direction away from the workpiece 7 , so that the fixing groove moves along the fixing rod 41 , thereby releasing the fixing of the opening end frame 73 by the pressing plate 43 .

[0088] In step S63, specifically, the position of the arc plate 11 is adjusted by the rotary handle 134 so that the arc plate 11 is away from the bottom end frame 71, and then the workpiece 7 is hoisted by the hoisting device to separate the workpiece 7 from the special-shaped workpiece fixing device.

[0089] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A method for processing a special-shaped workpiece, characterized in that: The device for fixing a special-shaped workpiece is used, wherein the workpiece (7) comprises a bottom end frame (71), a top end frame (72) and an open end frame (73), and comprises the following steps: S1: Adjust the workpiece fixture; S2: fixed open end frame (73); S3: Tighten the workpiece (7).

2. The method for processing a special-shaped workpiece according to claim 1, characterized in that: The special-shaped workpiece fixing device comprises a top plate (2), and step S3 specifically comprises: S31: Adjust the top plate (2).

3. The method for processing a special-shaped workpiece according to claim 2, characterized in that: In step S31, the special-shaped workpiece fixing device includes a tension connection member (3).

4. The method for processing a special-shaped workpiece according to claim 3, characterized in that: A connection hole (21) is provided on the top plate (2).

5. The method for processing a special-shaped workpiece according to claim 4, characterized in that: In step S31, the top plate (2) is placed on the top frame (72) so that the tension connector (3) enters the connection hole (21).

6. The method for processing a special-shaped workpiece according to claim 5, characterized in that: The special-shaped workpiece fixing device further comprises a base (1), and the base (1) further comprises a bottom plate (12) and a positioning block (14), wherein the positioning block (14) is connected to the bottom plate (12).

7. The method for processing a special-shaped workpiece according to claim 6, characterized in that: The tension connection member (3) comprises a tension rod (31) and a tension nut (32); one end of the tension rod (31) is connected to the base (1), and the other end enters the connection hole (21) and is threadedly connected to the tension nut (32).

8. The method for processing a special-shaped workpiece according to claim 6, characterized in that: The special-shaped workpiece fixing device also includes a pressing plate assembly (4), and the pressing plate assembly (4) is arranged on the positioning block (14).

9. The method for processing a special-shaped workpiece according to claim 1, characterized in that: The following steps are also included: S4: Check the stability of fixation.

10. The method for processing a special-shaped workpiece according to claim 9, characterized in that: The following steps are also included: S5: processing workpiece (7); S6: Separate the workpiece (7) from the special-shaped workpiece fixing device.

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