Blank clamping device and clamping method for numerical control machining

Abstract

The application provides a blank clamping device and clamping method for numerical control machining, the clamping device comprises a reference plate 10, a fixed box 7 and a movable box 8, wherein: the reference plate 10, the fixed box 7 and the movable box 8 are fixed on the machine tool platform by bolts; the structure of the reference plate 10 is rectangular, dovetail grooves 12 are uniformly distributed on one side, the reference plate 10 is connected with the fixed box 7 and the movable box 8 in the form of dovetail groove; the fixed box 7 is perpendicular to the two contact surfaces of the part blank 1; the vertical contact surface of the fixed box 7 and the part blank 1 plays a positioning role, and the machining origin in numerical control machining is located on the plane; the movable box 8 is provided with a special slider 2, the special slider 2 is connected with the movable box 8 in the form of dovetail sliding groove 13; the contact surface of the special slider 2 and the part blank 1 is symmetrical to the contact surface of the special slider 2 and the dovetail sliding groove 13; the special slider 2 is internally provided with a thread, the thread is a self-locking thread, the thread axis is located on the angle bisector of the included angle formed by the two inclined surfaces in the special slider 2, and is perpendicular to the short plane of the special slider 2.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of mechanical processing, and particularly relates to a blank clamping device and clamping method for numerical control machining. BACKGROUND

[0002] In the field of numerical control milling machine machining of aviation parts, the clamping of small and medium-sized parts is mostly carried out by means of pressing plate bolt clamping, vice clamping and special tooling clamping, among which the pressing plate bolt clamping is a commonly used part clamping method.

[0003] Among these methods, the pressing plate bolt clamping adopts a clamping method of directly fixing the part on a square box or a machine tool platform, and the flexibility of this method is low for large swing angle machining, and in addition, the machining of one part often needs multiple clamping and multiple alignment due to the lower limit, bottom angle and other part structures, so as to ensure the machining accuracy of the part. Before the pressing plate bolt clamping, the blank needs to be milled into a regular hexagonal shape, which leads to a long preparation time before machining, and the position for pressing plate clamping needs to be reserved in the part clamping scheme, which often results in a frame left around the part, leading to an increase in the size of the blank and causing waste.

[0004] The vice clamping is more convenient than the pressing plate bolt clamping, and has higher flexibility for swing angle machining, and the machining of a part can often be completed by one-time clamping. However, this scheme is only suitable for the machining of small parts, and the size of the clamped part is limited by the stroke and the size of the clamping plate of the vice. Similarly, if a vice with a large stroke is used, the screw direction of the vice is prone to interference with the main shaft of the machine tool during swing angle machining.

[0005] The special tooling clamping is extremely convenient for the machining of specific parts, but its versatility is low, and it is suitable for the machining of large quantities of single parts. The number of aviation parts for scientific research is increasing, and the design of the parts is frequently changed, which often leads to waste of special tooling.

[0006] Among the existing clamping methods, there is a lack of a universal, simple and flexible part clamping scheme that can improve the machining efficiency of small and medium-sized machine tools. SUMMARY

[0007] The application provides a blank clamping device and clamping method for numerical control machining, which can solve the problem of low machining efficiency of small and medium-sized machine tools.

[0008] In a first aspect, the application provides a blank clamping device for numerical control machining, comprising a reference plate 10, a fixed box body 7 and a movable box body 8, wherein:

[0009] The reference plate 10, the fixed box body 7 and the movable box body 8 are fixed on the machine tool platform by bolts;

[0010] The structure of the reference plate 10 is rectangular, and dovetail grooves 12 are uniformly distributed on one side. The reference plate 10 is connected to the fixed box 7 and the movable box 8 in the form of dovetail grooves.

[0011] The two contact surfaces of the fixed box 7 and the part blank 1 are perpendicular to the reference plate 10. The vertical contact surface of the fixed box 7 and the part blank 1 serves as positioning, and the machining origin in numerical control machining is determined.

[0012] The movable box 8 has a special slider 2, which is connected to the movable box 8 in the form of a dovetail sliding groove 13. The contact surface of the special slider 2 and the part blank 1 is symmetrical to the contact surface of the special slider 2 and the dovetail sliding groove 13. The special slider 2 is internally threaded, the thread is self-locking, the thread axis is perpendicular to the short plane of the special slider 2 and is on the angle bisector of the included angle between the two inclined surfaces of the special slider 2. The special bolt 4 is connected to the internally threaded special slider 2. Through the tightening action of the threaded structure, the special slider 2 is driven to move downward along the dovetail sliding groove 13, and the axial force of the threaded tightening is converted into the clamping force of the dovetail sliding groove 13 and the part blank 1 through the two inclined surfaces of the special slider 2. The non-threaded part of the special bolt 4 is a circular arc surface curved to one side of the axis, which is in sliding contact with the spring 3. One end of the spring 3 is fixed to the movable box 8. When the special bolt 4 is loosened, the spring pushes the special bolt 4, which drives the special slider 2 to move upward along the dovetail sliding groove 13, thereby loosening the part blank 1 and completing the restoration of the clamp. The head of the special bolt 4 is fixed to the universal flexible shaft joint 5, which shifts the wrench action point to one side of the movable box 8. The movable box 8 is connected to the machine tool platform by bolts. The bolt holes on the movable box 8 are in the form of sliding grooves 11. When the movable box 8 needs to be moved due to the size of the part blank 1, the sliding grooves 11 can adapt to the grid-shaped bolt grooves of the machine tool platform to complete the bolt fixation of the movable box 8 and the machine tool platform.

[0013] Specifically, the upper plane of the movable box 8 and the fixed box 7 is in contact with the bottom surface of the part blank 1.

[0014] Specifically, the distance between the dovetail grooves 12 on the reference plate 10 is less than the horizontal travel of the special slider 2 on the movable box 8.

[0015] Specifically, when the travel of the special slider 2 is not enough to clamp the part blank 1, the dovetail grooves 12 on the reference plate 10 can move the movable box 8 equidistantly to adapt to the size of the part blank 1.

[0016] Specifically, the thickness of the vertical contact surface of the fixed box 7 and the part blank 1 is ≤70mm.

[0017] Specifically, the specially designed slider 2, dovetail sliding groove 13, and part blank 1 are matched to ensure that the bolt is subjected to axial force when clamped, and to avoid bolt breakage due to shear force or unstable clamping due to uneven force during clamping.

[0018] Specifically, the bolt head of the special bolt 4 is larger than the width of the U-shaped groove 6 on the movable housing 8. When the threaded structure is tightened, it contacts the movable housing 8, forming an axial force for thread tightening.

[0019] Specifically, the diameter of the bolt portion of the special bolt 4 is slightly smaller than the diameter of the non-threaded portion, and the diameter of the non-threaded portion and the diameter of the spring 3 are slightly larger than the width of the U-shaped groove 6. The curved surface shape of the U-shaped groove 6 and the non-threaded portion of the special bolt 4 can constrain the position of the spring.

[0020] Specifically, the total width of the special slider 2 is ≤70mm. When the blank part 1 is not clamped, when the special slider 2 moves to the lowest point, the side A of the movable box 8 does not exceed the left end point of the special slider 2.

[0021] Secondly, this application provides a method for clamping blanks for CNC machining, the method comprising:

[0022] Step 1. Attach the fixed housing 7 and the reference plate 10. Figure 3 Fixed on the machine tool;

[0023] Step 2. Based on the dimensions of the part blank 1, select a suitable dovetail groove 12 and fix the movable box 8 on the machine tool;

[0024] Step 3. Press the blank part 1 according to the attached... Figure 2 The contact surface between the workpiece blank 1 and the clamping device is required to be flat and parallel to the contact surface of the corresponding special slider 2.

[0025] Step 4. When programming the part, establish a coordinate system with the vertical direct contact surface between the fixed box 7 and the part blank 1 as the X=0 or Y=0 plane, and the horizontal contact surface between the movable box 8 and the part blank 1 as the Z=0 plane. The machining allowance is 5mm. A frame is reserved at the bottom clamping part of the part blank 1. The frame thickness is ≥ the vertical stroke of the special slider 2 on the movable box 8.

[0026] Step 5. Place the part blank 1 on the tooling, tighten the universal flexible shaft connector 5, and transmit the tightening force to the special bolt 4 to complete the tightening action between the special bolt 4 and the special slider 2. This will drive the special slider 2 to move down along the dovetail sliding groove 13, and convert the axial force of the thread tightening into the clamping force towards the dovetail sliding groove 13 and the part blank 1 through the two inclined surfaces of the special slider 2.

[0027] Step 6. Straighten and align the parts, then proceed with machining.

[0028] Step 7. After the part is machined, the universal flexible shaft joint 5 is unscrewed. When the special bolt 4 is unscrewed from the threaded structure of the special sliding block 2, the spring 3 pushes the special bolt 4, the special bolt 4 drives the special sliding block 2 to move upward along the dovetail sliding groove 13, and then the part blank 1 is loosened, and the clamp is restored;

[0029] Step 8. Take out the part, and the machining is completed.

[0030] In summary, the present application provides a part blank 1 clamping device for numerical control machining, which has the following advantages:

[0031] 1. This method is more flexible for large angle machining. The tool can complete large angle machining around the part, which means that more than 90% of aviation parts can be machined once clamped, greatly saving machining time.

[0032] 2. Compared with the clamping of the press plate bolt, the part blank 1 does not need to be milled into a hexagonal shape before clamping. Only the vertical surface, horizontal bottom surface and inclined surface in contact with the movable box 8 and the fixed box 7 need to be machined, shortening the milling time.

[0033] 3. Compared with the clamping method of the bolt press plate, the part blank 1 does not need to reserve a large amount of process platform around or on both sides of the part before machining. Only a part of the excess amount is left at the bottom of the part, saving production cost.

[0034] 4. The use of the reference plate 10 and the dovetail groove 12 makes the tool adjustable according to the size of the part blank 1. It has a certain universality for small and medium-sized parts in aviation, avoiding the replacement and purchase of the vise clamp.

[0035] 5. The combination of the special sliding block 2, the special bolt 4 and the spring 3 converts the horizontal screw rod of the vise into a vertical bolt, shortens the horizontal space occupied by the tool, increases the tool swing angle, and avoids the interference between the tool swing angle along the screw rod and the main shaft of the machine tool caused by the too long exposure of the screw rod.

[0036] 6. The method of using the universal flexible shaft joint 5 in combination with the special bolt 4 shifts the wrench position, so that the tightening operation is not restricted by space. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 A schematic diagram of a blank clamping device for numerical control machining is provided in the present application;

[0038] Figure 2 A-A sectional view of a blank clamping device for numerical control machining is provided in the present application;

[0039] Figure 3A B-B sectional view of a blank clamping device for numerical control machining provided by the present application;

[0040] Wherein: 1 - part blank, 2 - special slider, 3 - spring, 4 - special bolt, 5 - universal flexible shaft joint, 6 - U-shaped groove, 7 - fixed box, 8 - movable box, 9 - screw, 10 - reference plate, 11 - sliding groove, 12 - dovetail groove, 13 - dovetail type sliding groove. DETAILED DESCRIPTION

[0041] The present application provides a part blank 1 clamping device and clamping method for numerical control machining, which is flexible and convenient for small and medium-sized part blanks 1, and provides power assistance for small and medium-sized machine tools.

[0042] Example one

[0043] As shown in Figures 1-3 , the present application provides a part blank clamping device for numerical control machining, which comprises a reference plate 10, a fixed box 7 and a movable box 8, wherein:

[0044] The reference plate 10, the fixed box 7 and the movable box 8 are fixed on the machine tool platform by bolts;

[0045] The reference plate 10 is rectangular in structure, and dovetail grooves 12 are uniformly distributed on one side. The reference plate 10 is connected to the fixed box 7 and the movable box 8 in the form of a dovetail groove;

[0046] The two contact surfaces of the fixed box 7 and the part blank 1 are perpendicular to the reference plate 10; the vertical contact surface (see attached Figure 2 ) of the fixed box 7 and the part blank 1 plays a positioning role, positioning the machining origin in numerical control machining;

[0047] The movable box 8 has a special slider 2, which is connected to the movable box 8 in the form of a dovetail type sliding groove 13; the contact surface of the special slider 2 and the part blank 1 is symmetrical to the contact surface of the special slider 2 and the dovetail type sliding groove, i.e. attached Figure 2 The included angle between the two inclined lines and the horizontal line in the cross section of the special slider 2 is complementary; the special slider 2 has an internal thread, which is a self-locking thread, and the thread axis is perpendicular to the short plane on the special slider 2 and located on the angle bisector of the included angle between the two inclined planes on the special slider 2; the special bolt 4 is connected to the internal thread of the special slider 2, and through the tightening action of the thread structure, it drives the special slider 2 to move downward along the dovetail type sliding groove 13, and converts the axial force of the thread tightening into clamping force to the dovetail type sliding groove 13 and the part blank 1 through the two inclined planes of the special slider 2; the non-thread part of the special bolt 4 is a curved arc surface to one side of the axis, which is in sliding contact with the spring 3, and the other end of the spring 3 is fixed on the movable box 8 as attached Figure 2When the special bolt 4 is unscrewed from the threaded structure of the special sliding block 2, the spring 3 pushes the special bolt 4, the special bolt 4 drives the special sliding block 2 to move upwards along the dovetail sliding groove 13, and then the part blank 1 is loosened, and the clamp is restored. The bolt head of the special bolt 4 is fixedly connected with the universal flexible shaft joint 5, and the action point of the wrench is transferred to one side of the movable box body 8 through the universal flexible shaft joint 5, as shown in the accompanying drawings Figure 2 , so as to facilitate the operator to tighten the clamp. The movable box body 8 is connected with the machine tool platform by bolts, and the bolt holes on the box body are designed in the form of a U-shaped groove 6 as shown in the accompanying drawings Figure 3 . When the movable box body 8 needs to be moved due to the size of the part blank 1, the U-shaped groove 6 can adapt to the grid-shaped bolt groove of the machine tool platform so that the bolt passes through and fixes the movable box body 8 on the machine tool.

[0048] Specifically, the spacing between the dovetail grooves 12 on the reference plate 10 is less than the horizontal travel of the special sliding block 2 on the movable box body 8.

[0049] Specifically, when the travel of the special sliding block 2 is not enough to meet the clamping requirement, the dovetail grooves 12 on the reference plate 10 can be used for equidistant movement of the movable box body 8 to adapt to the size of the part blank 1.

[0050] It should be noted that the dovetail grooves 12 on the reference plate 10 can ensure that the fixed box body 7 and the movable box body 8 are installed on the same straight line after installation, so as to control the installation accuracy and then ensure the clamping accuracy.

[0051] It should be noted that the vertical contact surface (see the accompanying drawings Figure 2 ) between the part blank 1 and the fixed box body 7 is a reference surface, which needs to be milled before processing and can be used as an X=0 reference surface or a Y=0 reference surface after clamping.

[0052] Specifically, the thickness of the vertical contact surface between the fixed box body 7 and the part blank 1 is ≤70mm, and the conventional tool on one side of the fixed box body 7 can be tilted by 90° during part processing, so that the part processing is more flexible.

[0053] Specifically, the structure of the special sliding block 2 and the dovetail sliding groove 13 can ensure that the bolt is axially stressed during clamping, so as to avoid the phenomenon that the special bolt 4 is broken due to shear component force and the clamping is not firm due to uneven stress during clamping.

[0054] It should be noted that the part blank 1 needs to be processed with an inclined surface before clamping, so as to cooperate with the special sliding block 2 to complete the clamping and fixing Figure 2

[0055] Specifically, the bolt head of the special bolt 4 is larger than the width of the U-shaped groove 6 on the movable box body 8, and when the threaded structure is tightened, it is in contact with the movable box body 8 and the part blank 1, as shown in the accompanying drawings Figure 2 , forming an axial force of the threaded tightening.

[0056] ​Specifically, the bolt part of the special bolt 4 has a diameter slightly smaller than the non-bolt part, and the diameter of the non-bolt part and the spring 3 is slightly smaller than the width of the U-shaped groove 6 (see the front view in detail Figure 1 and the accompanying Figure 2 ), and the curved shape of the U-shaped groove 6 and the non-threaded part of the special bolt 4 can constrain the position of the spring.

[0057] Specifically, the Figure 2 contact surface of the movable box body 8 and the bottom surface of the part blank 1 is flush with the contact surface of the fixed box body 7 and the bottom surface of the part blank 1.

[0058] It should be noted that the contact surface of the movable box body 8 and the bottom surface of the part blank 1 is the Z=0 plane in the machining coordinate system due to the pressure applied by the special sliding block.

[0059] It should be noted that the bottom surface of the part blank 1 needs to be milled flat before clamping, so that the upper flat surface of the movable box body 8 can be used as the reference surface during machining.

[0060] Specifically, the total width of the special sliding block 2 is ≤70mm, when the part blank 1 is not clamped, the special sliding block 2 moves to the lowest point, and the Figure 2 side A of the movable box body 8 cannot exceed the left endpoint of the special sliding block 2, and during part machining, most conventional tools on one side of the special sliding block 2 can be angled by 90°, making part machining more flexible.

[0061] In summary, the present application provides a part blank 1 clamping device for numerical control machining, which has the following advantages:

[0062] 1. This method is more flexible for large-angle machining, and the tool can complete large-angle machining around the part, which means that more than 90% of aviation parts can be machined in one clamping, greatly saving machining time.

[0063] 2. Compared with the clamping of the press plate bolt, the part blank 1 does not need to be milled into a hexagonal shape before clamping, only the vertical surface, horizontal bottom surface and inclined surface of the part blank 1 contacting with the movable box body 8 and the fixed box body 7 need to be machined, shortening the milling time.

[0064] 3. Compared with the clamping method of the bolt press plate, the part blank 1 does not need to reserve a large amount of process platform around or on both sides of the part before machining, only a part of the excess amount is left at the bottom of the part, saving production cost.

[0065] 4. The use of the reference plate 10 and the dovetail groove 12 makes the tool adjustable according to the size of the part blank 1, which has a certain universality for small and medium-sized parts in aviation, avoiding the replacement and purchase of the vise clamping.

[0066] 5. The combination of special slider 2 and special bolt 4, spring 3, converts the transverse screw rod of the vice into a longitudinal bolt, shortens the transverse space occupied by the tool, increases the tool swing angle, and avoids the interference between the tool swing angle along the screw rod and the machine tool spindle.

[0067] 6. The combination of universal flexible shaft joint 5 and special bolt 4 shifts the wrenching position, making the tightening operation not restricted by space.

[0068] Example Two

[0069] The present application provides a part blank 1 clamping method for numerical control machining, comprising:

[0070] Step 1. Fix the fixed box 7 and the reference plate 10 on the machine tool

[0071] Step 2. According to the size of the part blank 1, select the appropriate dovetail groove 12 to fix the movable box 8 on the machine tool.

[0072] Step 3. Process the contact surface of the part blank 1 and the clamping device. The processed plane is parallel to the contact surface of the special slider, and the rest of the contact surface can be seen.

[0073] Step 4. When programming the part, take the positioning reference surface of the fixed box 7 (attached Figure 2 The vertical surface of the part blank 1 in contact with the fixed box 7 is the X=0 or Y=0 plane, and the contact surface of the movable box 8 with the bottom surface of the part blank 1 is the Z=0 plane to establish the coordinate system. The part processing allowance is 5mm, and the edge frame on the bottom of the part is ≥ the stroke of the special slider 2 on the movable box 8 in the vertical direction

[0074] Step 5. Place the part blank 1 on the clamping device, tighten the universal flexible shaft joint 5, and transfer the tightening force to the special bolt 4. Complete the thread structure tightening action between the special bolt 4 and the special slider 2, drive the special slider 2 to move down along the dovetail sliding groove 13, and convert the axial force of the thread tightening to the clamping force of the dovetail sliding groove 13 and the part blank 1 through the two inclined surfaces of the special slider 2

[0075] Step 6. Straighten and align, and process the part

[0076] Step 7. After the part is processed, loosen the universal flexible shaft joint 5. When the special bolt 4 and the special slider 2 are loosened, the spring 3 pushes the special bolt 4, the special bolt 4 drives the special slider 2 to move upwards along the dovetail sliding groove 13, completes the restoration of the clamp, and then releases the part blank 1

[0077] Step 8. Take out the part, and the processing is completed.

Claims

1. A blank clamping device for numerically controlled machining, characterized in that, It comprises a reference plate (10), a fixed box (7) and a movable box (8), wherein: The reference plate (10), the fixed box (7) and the movable box (8) are fixed on the machine tool platform by bolts; The structure of the reference plate (10) is rectangular, and dovetail grooves (12) are uniformly distributed on one side. The reference plate (10) is connected with the fixed box (7) and the movable box (8) in the form of dovetail grooves. The two contact surfaces of the fixed box (7) and the part blank (1) are perpendicular to the reference plate (10). The vertical contact surface of the fixed box (7) and the part blank (1) plays a positioning role, and the machining origin in numerical control machining is located on the vertical contact surface. The movable box (8) has a special slider (2), which is connected with the movable box (8) in the form of dovetail sliding groove (13). The contact surface of the special slider (2) and the part blank (1) is symmetrical to the contact surface of the special slider (2) and the dovetail sliding groove (13). The special slider (2) is internally threaded, the thread is self-locking thread, the thread axis is located on the angle bisector of the included angle between the two inclined surfaces in the special slider (2), and is perpendicular to the short plane of the special slider (2). The special bolt (4) is connected with the internally threaded special slider (2). Through the tightening action of the threaded structure, the special bolt (4) drives the special slider (2) to move downward along the dovetail sliding groove (13), and converts the axial force of the thread tightening into the pressing force of the dovetail sliding groove (13) and the part blank (1) through the two inclined surfaces of the special slider (2). The non-threaded part of the special bolt (4) is a circular arc bent to one side of the axis, and the circular arc part is in sliding contact with one end of the spring (3), and the other end of the spring (3) is fixed on the movable box (8). When the threaded structure of the special bolt (4) and the special slider (2) is unscrewed, the spring (3) pushes the special bolt (4), the special bolt (4) drives the special slider (2) to move upward along the dovetail sliding groove (13), and then loosens the part blank (1), and the clamp is restored. The head of the special bolt (4) is fixed with the universal flexible shaft joint (5), which shifts the wrench action point to one side of the movable box (8). The movable box (8) has a sliding groove (11), and the bolt passes through the sliding groove (11) to fix the movable box (8) on the machine tool. When the movable box (8) needs to be moved due to the size of the part blank (1), the sliding groove (11) can adapt to the grid-shaped bolt groove on the machine tool platform, so that the bolt can smoothly fix the movable box (8).

2. The blank clamping device according to claim 1, characterized in that The horizontal contact surface of the movable box (8) and the part blank (1) and the horizontal contact surface of the fixed box (7) and the part blank (1) are at the same height.

3. The blank clamping device according to claim 1, characterized in that The distance between the dovetail grooves (12) on the reference plate (10) is less than the horizontal travel of the special slider (2) on the movable box (8).

4. The blank clamping device according to claim 1, characterized in that When the horizontal travel of the special slider (2) on the movable box (8) is not enough to meet the size requirements of the part blank (1), the dovetail grooves (12) on the reference plate (10) can make the movable box (8) move equidistantly to adapt to the size of the part blank (1).

5. The blank clamping device according to claim 1, characterized in that The thickness of the vertical contact surface of the fixed box (7) and the part blank (1) is ≤70mm.

6. The blank clamping device according to claim 1, characterized in that The special slider (2) cooperates with the dovetail sliding groove (13) and the part blank (1) to ensure that the bolt is axially stressed when the device is clamped, thereby avoiding the phenomenon of bolt fracture due to shear component or loose clamping due to uneven stress.

7. The blank clamping device according to claim 1, characterized in that The head of the special bolt (4) is larger than the width of the U-shaped groove (6) on the movable box, so that the head can contact the movable box when the threaded structure is tightened, and axial force is formed when the thread is tightened.

8. The blank clamping device of claim 1, wherein The diameter of the threaded part of the special bolt (4) is slightly smaller than the diameter of the non-threaded part, and the diameter of the non-threaded part and the spring (3) is slightly smaller than the width of the U-shaped groove (6). The curved shape of the U-shaped groove (6) and the non-threaded part of the special bolt (4) can constrain the relative position of the spring.

9. The blank clamping device of claim 1, wherein The total width of the special slider (2) is ≤70mm, and when the special slider (2) moves to the lowest point, the side A of the movable box (8) does not exceed the left endpoint of the special slider (2).

10. A method for clamping a blank for numerically controlled machining, characterized in that the method It comprises: Step 1. Fix the fixed box (7) and the reference plate (10) on the machine tool; Step 2. According to the size of the part blank (1), select the appropriate dovetail groove (12) and fix the movable box (8) on the machine tool; Step 3. Process the contact surface of the part blank (1) and the clamping device. The processed surface needs to be flat and parallel to the contact surface of the clamping device; Step 4. When programming the part, take the vertical contact surface of the fixed box (7) and the part blank (1) as the X=0 or Y=0 plane, and the horizontal contact surface of the movable box (8) and the part blank (1) as the Z=0 plane to establish the coordinate system. The processing allowance is 5mm, and the part blank (1) bottom clamping part reserves a frame, and the frame thickness ≥ the stroke of the special slider (2) on the movable box (8) in the vertical direction; Step 5. Place the part blank (1) on the tooling, tighten the universal flexible shaft joint (5), and transmit the tightening force to the special bolt (4) to complete the threaded structure tightening action between the special bolt (4) and the special slider (2), drive the special slider (2) to move down along the dovetail sliding groove (13), and convert the axial force of the threaded tightening into the clamping force of the dovetail sliding groove (13) and the part blank (1) through the two inclined surfaces of the special slider (2); Step 6. Straighten and align, and process the part; Step 7. After the part is processed, loosen the universal flexible shaft joint (5). When the threaded structure of the special bolt (4) and the special slider (2) is loosened, the spring (3) pushes the special bolt (4), which drives the special slider (2) to move upwards along the dovetail sliding groove (13), completes the restoration of the clamp, and then loosens the part blank (1); Step 8. Take out the part and complete the processing.

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