Automatic clamp for rivet welding of tool apron

Abstract

The utility model relates to an automatic fixture for rivet welding of tool aprons, which is used for clamping and positioning an inner tool apron and an outer tool apron and comprises a base, a transverse positioning unit, a vertical positioning unit, a clamping cylinder and a vertical centering unit. A transverse positioning unit and a vertical positioning unit are arranged on one side of the base, the transverse positioning unit comprises a transverse positioning block and a transverse air cylinder, and the vertical positioning unit comprises a vertical positioning block and a vertical air cylinder; a vertical centering unit is vertically arranged on the other side of the base in a sliding mode and comprises a rack, a translation air cylinder and a double-outlet-rod air cylinder, the translation air cylinder is arranged at the front end of the rack, the double-outlet-rod air cylinder is transversely connected to the translation air cylinder in a sliding mode, and pushing claws are arranged on two transverse piston rods of the double-outlet-rod air cylinder; and the push claw downwards extends into the inner tool apron to move bidirectionally, so that the inner tool apron transversely moves and is centered. The inner tool apron and the outer tool apron can be quickly and accurately positioned and clamped, the manual adjustment time is saved, and the production speed and efficiency are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, in particular to an automatic clamp used for riveting and welding of a tool holder. Background Art

[0002] The shield machine cutter holder is used to install the roller cutter. The cutter holder consists of a left cutter holder and a right cutter holder. The left cutter holder and the right cutter holder have the same structure. The left cutter holder includes an inner cutter holder and an outer cutter holder. The right cutter holder also has the same structure. Figure 1 and 2 shown.

[0003] The inner and outer tool holders need to be fixed together by riveting and welding. There are requirements for the welding positions of the inner and outer tool holders: first, one end face of the inner and outer tool holders must be flush, that is, the end face A on the inner tool holder and the end face B on the outer tool holder are in the same plane; second, the inner tool holder must be arranged in the center of the outer tool holder, that is, the distance between an outer wall of the inner tool holder and an inner wall of the outer tool holder is X1, and the distance between the other outer wall of the inner tool holder and the other inner wall of the outer tool holder is X2, ensuring that X1 and X2 are equal. Figure 3 shown.

[0004] Based on the above tool holder welding requirements, it is necessary to position the inner tool holder and the outer tool holder before welding. The positioning method uses a fixture to position and clamp the tool holder. The fixture is a device used to fix the workpiece, which can ensure the position accuracy and stability of the workpiece during the processing. The clamping and positioning accuracy of the fixture will affect the welding quality.

[0005] The traditional clamps are manual clamps, which have a simple structure and are easy to make, but the clamping force is unstable and requires manual adjustment during use. Not only can the rapid positioning and centering of the tool holder not be achieved, but the labor intensity is high, the production efficiency is low, and it is difficult to ensure the position accuracy of the tool holder during the processing. The clamping force of the manual clamp often depends on the technical level of the operator, so the clamping force may not be stable enough, affecting the welding accuracy and quality of the tool holder. Summary of the invention

[0006] In order to solve the problem that traditional manual clamps cannot quickly and accurately realize the positioning of the tool holder and the positioning and clamping effect is low, the utility model provides an automated clamp for riveting and welding the tool holder, which adopts a cylinder to quickly position the tool holder from the X-axis and Y-axis directions, while ensuring the reliability of the clamping, and can increase the clamping and positioning accuracy of the clamp, thereby improving the subsequent welding quality of the tool holder.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] An automated fixture for riveting and welding a tool holder, used for clamping and positioning an inner tool holder and an outer tool holder, comprising a base, a lateral positioning unit, a vertical positioning unit, a clamping cylinder and a vertical centering unit; the lateral positioning unit and the vertical positioning unit are arranged on one side of the base, the lateral positioning unit comprises lateral positioning blocks and a lateral cylinder arranged at intervals in a lateral direction, so as to facilitate lateral positioning of the outer tool holder, and the vertical positioning unit comprises vertical positioning blocks and a vertical cylinder arranged at intervals in a vertical direction, so as to facilitate vertical positioning of the outer tool holder and the inner tool holder;

[0009] The horizontal positioning unit and the vertical positioning unit together form a rectangular positioning area, and the inner tool holder and the outer tool holder are positioned and clamped in the area. The clamping cylinders for pressing the outer tool holder are symmetrically arranged on the bases on both sides of the positioning area to ensure that the position of the outer tool holder remains unchanged;

[0010] The vertical sliding arrangement on the other side of the base is used to adjust the centering of the inner tool holder. The vertical centering unit reciprocates inside and outside the positioning area. The vertical centering unit includes a frame, a translation cylinder and a double-rod cylinder. The rear end of the frame is slidably connected to the base to facilitate adjustment of the position of the vertical centering unit. The translation cylinder is arranged at the front end of the frame. The double-rod cylinder is laterally slidably connected to the translation cylinder to facilitate driving the double-rod cylinder to move laterally. Push claws are arranged on the two lateral piston rods of the double-rod cylinder. The two push claws move simultaneously, and the push claws extend downward into the inner tool holder and move in both directions to make the inner tool holder move laterally to the center.

[0011] Furthermore, the number of the lateral positioning units is two, the two lateral positioning units are arranged vertically at intervals, and the clamping cylinder is arranged between the two lateral positioning units, and the clamping cylinder ensures that the workpiece is more stable during welding;

[0012] There are two vertical positioning units, which are arranged laterally at intervals. A photoelectric sensor for monitoring the presence of an internal tool holder is also provided on the base between the two vertical positioning units. The photoelectric sensor is located outside the positioning area to facilitate signal transmission to control the automatic operation of subsequent components.

[0013] Furthermore, the two horizontal positioning blocks and the two vertical positioning blocks are respectively located at two adjacent side edges of one positioning area, and the two horizontal cylinders and the two vertical cylinders are respectively located at two adjacent side edges of the other positioning area.

[0014] Further, the horizontal positioning block includes an L-shaped plate and a rib plate arranged on the L-shaped plate, which improves the strength of the horizontal positioning block and facilitates the abutment of the outer tool holder. The vertical positioning block has the same structure as the horizontal positioning block. The horizontal cylinder includes a cylinder body I and a horizontal push plate controlled by the cylinder body I. The vertical cylinder includes a cylinder body II and a vertical push plate controlled by the cylinder body II. A vertical push block is arranged at one corner of the vertical push plate. The vertical push plate is used to push the outer tool holder, and the vertical push block is used to push the inner tool holder.

[0015] Further, the base is a double-layer plate frame structure. The upper layer of the base is provided with the horizontal positioning unit, the vertical positioning unit and the vertical centering unit. The lower layer of the base is provided with a pushing cylinder for driving the frame to slide, which facilitates the reasonable layout of components.

[0016] Further, a slide rail is arranged on the other side of the base, and the frame is slidably arranged on the slide rail to improve the stable and reliable sliding of the frame. The frame extends downward to connect the pushing cylinder. The frame is bent into an inverted "L" shape, and the front end of the frame bends upward and extends above the positioning area.

[0017] By the above technical solutions, the beneficial effects of the present utility model are as follows:

[0018] The structure of the present utility model is reasonably designed and driven by cylinders, realizing the automatic operation of riveting and welding processing. The horizontal positioning unit conveniently realizes the horizontal positioning of the outer tool holder, and the vertical positioning unit conveniently realizes the vertical positioning of the outer tool holder and the inner tool holder. The quick clamping cylinder is used to quickly clamp the outer tool holder, reducing the labor intensity, improving the production efficiency and the position accuracy, and further enabling the automatic positioning and clamping of the inner and outer tool holders.

[0019] The present utility model can accurately adjust the position of the inner tool holder on the outer tool holder by means of a pneumatic double-rod cylinder cooperating with two push claws to ensure that the inner tool holder is centered. After placing the inner tool holder in the outer tool holder, the vertical centering unit moves into the positioning area, and the push claws are driven bidirectionally and simultaneously by the double-rod cylinder to push the inner tool holder to move to the correct centered position on the outer tool holder, and the position of the inner tool holder can be quickly determined.

[0020] The present utility model can quickly and accurately position and clamp the inner and outer tool holders, saving the time of manual adjustment and greatly improving the production speed and efficiency. Since the riveting and welding automatic fixture can ensure that the inner and outer tool holders maintain a constant position during the welding process, it helps to achieve higher welding accuracy, reduce welding defects and improve product quality. The automatic fixture reduces the need for manual operation, thereby reducing the cost generated by manual operation to a certain extent, and can also reduce the workers' exposure to dangerous environments such as high temperature, high pressure and harmful gases during the welding process, improving production safety. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the combination of the inner tool holder and the outer tool holder.

[0022] Figure 2 This is a schematic diagram of the split inner and outer tool holders.

[0023] Figure 3 It is a side view of the combination of the inner tool holder and the outer tool holder.

[0024] Figure 4 The utility model is a top view of an automatic clamp used for riveting and welding of a knife seat.

[0025] Figure 5 The utility model is an axonometric drawing of an automatic clamp used for riveting and welding of a knife seat.

[0026] Figure 6 The utility model is a top view of a push cylinder of an automatic clamp used for riveting and welding a knife seat.

[0027] Figure 7 The utility model is an automatic fixture for riveting and welding of a knife seat. Figure 5 Schematic diagram of the oil pressure buffer and limit bolt at A in the middle.

[0028] Figure 8 The utility model is a front view of a push claw of an automatic clamp used for riveting and welding a knife seat.

[0029] Fig. 9 The utility model is a top view of the positioning and clamping state of an outer tool holder of an automatic clamp used for tool holder riveting and welding.

[0030] Fig.10 The utility model is a top view of the positioning and clamping state of the inner tool holder of an automatic clamp used for tool holder riveting and welding.

[0031] Fig.11 The utility model is a schematic diagram of a first embodiment of an automatic clamp for riveting and welding a tool holder.

[0032] Fig.12 This is a schematic diagram of situation 2 in an embodiment of an automated fixture for riveting and welding a tool holder according to the utility model.

[0033] Fig.13 This is a schematic diagram of situation 3 in an embodiment of an automated fixture for riveting and welding a tool holder according to the utility model.

[0034] The numbers in the accompanying drawings are: 1 inner tool holder, 2 outer tool holder, 3 end face A, 4 end face B, 5 positioning groove, 6 base, 7 horizontal positioning block, 8 horizontal cylinder, 81 cylinder body one, 82 horizontal push plate, 9 vertical positioning block, 10 vertical cylinder, 101 cylinder body two, 102 vertical push plate, 103 vertical push block, 11 clamping cylinder, 12 frame, 121 sliding seat, 122 hanging rod, 123 hanging plate, 13 translation cylinder, 14 double-rod cylinder, 15 slide rail, 16 push cylinder, 17 displacement sensor, 18 hydraulic buffer, 19 limit bolt, 20 push claw, 21 positioning area, 22 photoelectric sensor. DETAILED DESCRIPTION

[0035] The specific implementation of the utility model is described in detail below with reference to the accompanying drawings:

[0036] like Figure 4~Figure 13 As shown, an automated fixture for tool holder riveting is used for clamping and positioning the inner tool holder 1 and the outer tool holder 2, and assisting the subsequent welding operation of the inner tool holder 1 and the outer tool holder 2. The automated fixture includes a base 6, a lateral positioning unit, a vertical positioning unit, a clamping cylinder 11 and a vertical centering unit, as shown in FIG. Figure 4 and Figure 5 shown.

[0037] The base 6 is a double-layer plate frame structure, and the upper layer of the base 6 is provided with a horizontal positioning unit and a vertical positioning unit. Specifically, a horizontal positioning unit and a vertical positioning unit are provided on one side of the base 6, and the number of the horizontal positioning units is two, and the two horizontal positioning units are arranged vertically at intervals. The number of the vertical positioning units is also two, and the two vertical positioning units are arranged horizontally at intervals.

[0038] In this embodiment, the transverse positioning unit is used to push the outer tool holder 2 to perform transverse positioning, and each transverse positioning unit includes transverse positioning blocks 7 and transverse cylinders 8 arranged at intervals in the transverse direction. The transverse positioning block 7 includes an L-shaped plate and a rib plate arranged on the L-shaped plate, and the rib plate can improve the structural strength of the L-shaped plate. The transverse cylinder 8 includes a cylinder body 81 and a transverse push plate 82 controlled by the cylinder body 81, and the transverse push plate 82 is a flat plate structure.

[0039] The vertical positioning unit is used to push the outer tool holder 2 and the inner tool holder 1 for vertical positioning. Each vertical positioning unit includes a vertical positioning block 9 and a vertical cylinder 10 arranged at intervals in a vertical direction. The vertical positioning block 9 has the same structure as the horizontal positioning block 7. The vertical cylinder 10 includes a cylinder body 101 and a vertical push plate 102 controlled by the cylinder body 101. The vertical push plate 102 is a flat plate structure. A vertical push block 103 is provided at one corner of the vertical push plate 102. When the vertical push plate 102 is used to push the outer tool holder 2, the vertical push block 103 will not affect the outer tool holder 2. The vertical push block 103 is used to push the inner tool holder 1.

[0040] The horizontal positioning unit and the vertical positioning unit enclose a rectangular positioning area 21, and the positioning and clamping operations of the inner tool holder 1 and the outer tool holder 2 are carried out within the positioning area 21. Two horizontal positioning blocks 7 and two vertical positioning blocks 9 are respectively located at two adjacent side positions of the positioning area 21, and two horizontal cylinders 8 and two longitudinal cylinders are respectively located at the other two adjacent side positions of the positioning area 21.

[0041] On the base 6 on both sides of the positioning area 21, clamping cylinders 11 for pressing the outer tool holder 2 are symmetrically arranged. The number of clamping cylinders 11 is two, and the clamping cylinders 11 are arranged between the two horizontal positioning units. After the outer tool holder 2 is horizontally and vertically positioned, the two clamping cylinders 11 can be used to clamp and fix the edge of the outer tool holder 2.

[0042] On the base 6 between the two vertical positioning units, a photoelectric sensor 22 for monitoring the presence of the inner tool holder 1 is also provided. The photoelectric sensor 22 is located outside the positioning area 21. After the outer tool holder 2 is positioned and clamped, the inner tool holder 1 is placed inside the outer tool holder 2. After the photoelectric sensor 22 senses the inner tool holder 1, the positioning and centering operations of the inner tool holder 1 are started.

[0043] On the other side of the base 6, a vertical centering unit for adjusting the centering of the inner tool holder 1 is slidably arranged. The vertical centering unit is arranged on the upper layer of the base 6 and can slide linearly back and forth on the base 6. When sliding, the vertical centering unit reciprocates inside and outside the positioning area 21. The vertical centering unit includes a frame 12, a translation cylinder 13 and a double-rod cylinder 14.

[0044] The frame 12 includes a sliding seat 121, a suspension rod 122 and a suspension plate 123. The rear end of the frame 12 is slidably connected to the base 6, that is, the sliding seat 121 is slidably connected to the base 6. Specifically, a slide rail 15 is provided on the other side of the base 6, and the frame 12 is slidably arranged on the slide rail 15, that is, the slide rail 15 and the sliding seat 121 are slidably connected. A suspension rod 122 bent in a "ㄇ" shape is arranged above the sliding seat 121, and a suspension plate 123 in a "ㄇ" shape is arranged at one end of the suspension rod 122. After the sliding seat 121, the suspension rod 122 and the suspension plate 123 are connected and combined, the entire frame 12 is bent in an inverted "L" shape.

[0045] In order to drive the frame 12, a pushing cylinder 16 for driving the frame 12 to slide is arranged on the lower layer of the base 6. The frame 12 extends downward to connect to the pushing cylinder 16, that is, the sliding seat 121 is connected downward to the pushing cylinder 16. The pushing cylinder 16 can drive the frame 12 to reciprocate linearly, as Figure 7 shown.

[0046] In order to monitor the displacement of the frame 12, a displacement sensor 17 for monitoring the movement of the sliding seat 121 is provided on the base 6 beside the slide rail 15. At the same time, an oil pressure buffer 18 and a limit bolt 19 are provided on the base 6 at the end of the slide rail 15 to prevent the sliding seat 121 from leaving the slide rail 15 and play a limiting role. Figure 6 shown.

[0047] The front end of the frame 12 is bent upward and extends to above the positioning area 21. A translation cylinder 13 is arranged at the front end of the frame 12, that is, the translation cylinder 13 is arranged on the hanging plate 123. The translation cylinder 13 adopts a rodless cylinder. The translation cylinder 13 is laterally slidably connected to the double-rod cylinder 14, and the translation cylinder 13 can drive the double-rod cylinder 14 to move back and forth laterally. Push claws 20 are arranged on the two lateral piston rods of the double-rod cylinder 14. The two push claws 20 can move away or closer at the same time. The push claws 20 extend downward into the inner tool holder 1 and move in both directions, which can realize the lateral movement of the inner tool holder 1 to the center, such as Figure 8 shown.

[0048] The principle of the utility model is as follows: in the initial state, the horizontal cylinder 8 and the longitudinal cylinder are both in a retracted state, while the longitudinal cylinder is in an extended state, driving the vertical centering unit away from the positioning area 21 to ensure that the positioning area 21 is not blocked. When carrying out the positioning and clamping operation of the tool holder: first position and clamp the outer tool holder 2, first place the outer tool holder 2 in the positioning area 21 to avoid the outer tool holder 2 being inverted, and ensure that the largest area of ​​the outer tool holder 2 is in contact with the base 6. After the outer tool holder 2 is placed, the two vertical cylinders 10 are started at the same time to use the vertical push plate 102 to push the outer tool holder 2 toward the vertical positioning block 9. When the outer tool holder 2 is against the vertical positioning block 9, the vertical positioning of the outer tool holder 2 is achieved.

[0049] Then the two transverse cylinders 8 are started at the same time to push the outer tool holder 2 toward the transverse positioning block 7. When the outer tool holder 2 is against the transverse positioning block 7, the transverse positioning of the outer tool holder 2 is achieved, thereby achieving the transverse and vertical positioning and clamping of the outer tool holder 2. Then the outer tool holder 2 needs to be clamped. The two clamping cylinders 11 are operated at the same time to clamp the edges of the outer tool holder 2 on both sides to ensure that the position of the outer tool holder 2 will not change. Fig. 9 shown.

[0050] Then the inner tool holder 1 is positioned and clamped. The two vertical cylinders 10 are retracted at this time to ensure that there is no obstruction in the outer tool holder 2. Then the inner tool holder 1 is placed in the outer tool holder 2. Similarly, it is ensured that the plane with the largest area of ​​the inner tool holder 1 is in contact with the inner side of the outer tool holder 2 to prevent the inner tool holder 1 from being buckled. After the photoelectric sensor 22 detects the inner tool holder 1, it controls the push cylinder 16 to retract and drives the vertical centering unit to move above the positioning area 21. At this time, the double-rod cylinder 14 is located above the inner tool holder 1, and the push claw 20 extends into the positioning groove 5 of the inner tool holder 1. The positioning groove 5 here is customized to facilitate the description of the state of the push claw 20.

[0051] After the double-rod cylinder 14 is started, it drives the two push claws 20 to push to both sides at the same time, and the moving distances of the two push claws 20 are equal. If the inner tool holder 1 is placed just in the center, the push claw 20 that moves outward will only contact the side wall of the positioning groove 5 of the inner tool holder 1 and will not drive the inner tool holder 1 to move. If the inner tool holder 1 is placed to the right, the push claw 20 will drive the inner tool holder 1 to move to the left and center after moving outward. If the inner tool holder 1 is placed to the left, the push claw 20 will drive the inner tool holder 1 to move to the right and center after moving outward. Thereby, the inner tool holder 1 can be in a correct position inside the outer tool holder 2, that is, the inner tool holder 1 and the outer tool holder 2 need to maintain a distance of 2 mm on both sides.

[0052] After the inner tool holder 1 and the outer tool holder 2 are centered, the two vertical cylinders 10 extend and the inner tool holder 1 is pushed onto the vertical positioning block 9 by the vertical push block 103, thereby realizing the centering and clamping of the inner tool holder 1. At this time, the end face A3 and the end face B4 are flush, as shown in FIG. Fig.10 After the inner tool holder 1 is positioned and clamped, the two push claws 20 are retracted and no longer contact the positioning groove 5, and then the push cylinder 16 is extended to drive the vertical centering unit away from the positioning area 21, thus achieving the positioning and clamping of the inner tool holder 1 and the outer tool holder 2, and then the welding operation can be carried out.

[0053] It should be noted that the vertical positioning block 9 can realize vertical positioning of both the outer tool seat 2 and the inner tool seat 1, the vertical cylinder 10 can push both the outer tool seat 2 and the inner tool seat 1, the vertical cylinder 10 uses the vertical push plate 102 to push the outer tool seat 2, and uses the vertical push block 103 on the vertical push plate 102 to push the inner tool seat 1, and the vertical push plate 102 will not touch the outer tool seat 2 when pushing the inner tool seat 1.

[0054] The utility model hereby describes in detail the principle of realizing the centering positioning of the inner tool holder 1 by using the push claw 20: in the initial state, when the vertical centering unit is away from the positioning area 21, the translation cylinder 13 drives the double-rod cylinder 14 to be located at the other end of the translation cylinder 13, and the push claw 20 at this time does not correspond to the positioning groove 5 of the inner tool holder 1. Before the vertical centering unit approaches the positioning area 21, the translation cylinder 13 drives the double-rod cylinder 14 to be located at one end of the translation cylinder 13, and the push claw 20 at this time corresponds to the positioning groove 5 of the inner tool holder 1. After the vertical centering unit moves, the push claw 20 can be directly located in the positioning groove 5.

[0055] The double-rod cylinder 14 uses a cylinder with a stroke of 20mm and a stroke of 10mm on both sides. The positions of the two push claws 20 are fixed. When the push claws 20 are located in the positioning groove 5, the following situations will occur. Situation 1: The placement position of the inner tool holder 1 is centered, that is, the distances X1 and X2 between the outer wall of the inner tool holder 1 and the inner wall of the outer tool holder 2 are equal. At this time, the distances Y1 and Y2 between the push claws 20 and the side walls of the positioning groove 5 are also equal. When the push claws 20 have completed their stroke, the two push claws 20 are in contact with the inner side of the positioning groove 5 at the same time without generating any force, and the inner tool holder 1 will not move. Fig.11 shown.

[0056] Case 2: The inner tool holder 1 is placed to the right, that is, the distance X1 between the outer wall of the inner tool holder 1 and the inner wall of the outer tool holder 2 is greater than X2. At this time, the distance Y1 between the push claw 20 and the side wall of the positioning groove 5 is less than Y2. After the double-rod cylinder 14 is started, the push claw 20 on the left first hits the side wall of the positioning groove 5 and drives the inner tool holder 1 to move to the left. After the push claw 20 completes its stroke, the inner tool holder 1 is centered. Fig.12 As shown. Case 3: The inner tool holder 1 is placed to the left, that is, the distance X1 between the outer wall of the inner tool holder 1 and the inner wall of the outer tool holder 2 is less than X2. At this time, the distance Y1 between the push claw 20 and the side wall of the positioning groove 5 is greater than Y2. After the double-rod cylinder 14 is started, the push claw 20 on the right first hits the side wall of the positioning groove 5 and drives the inner tool holder 1 to move to the right. After the push claw 20 completes its stroke, the inner tool holder 1 is centered. Fig.13 shown.

[0057] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features and principles described in the patent scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. An automated clamp for riveting a tool holder, used for clamping and positioning an inner tool holder (1) and an outer tool holder (2), characterized in that: It comprises a base (6), a transverse positioning unit, a vertical positioning unit, a clamping cylinder (11) and a vertical centering unit; the transverse positioning unit and the vertical positioning unit are arranged on one side of the base (6); the transverse positioning unit comprises transverse positioning blocks (7) and a transverse cylinder (8) arranged at intervals in the transverse direction; and the vertical positioning unit comprises vertical positioning blocks (9) and a vertical cylinder (10) arranged at intervals in the vertical direction. The lateral positioning unit and the vertical positioning unit together form a rectangular positioning area (21), and the clamping cylinders (11) for clamping the outer tool holder (2) are symmetrically arranged on the bases (6) on both sides of the positioning area (21); The other side of the base (6) is vertically slidably provided with a vertical centering unit for adjusting the centering of the inner tool holder (1). The vertical centering unit reciprocates inside and outside the positioning area (21). The vertical centering unit comprises a frame (12), a translation cylinder (13) and a double-rod cylinder (14). The rear end of the frame (12) is slidably connected to the base (6). The front end of the frame (12) is provided with the translation cylinder (13). The translation cylinder (13) is laterally slidably connected to the double-rod cylinder (14). The two lateral piston rods of the double-rod cylinder (14) are both provided with push claws (20). The push claws (20) extend downward into the inner tool holder (1) and move in both directions to make the inner tool holder (1) laterally move to the center.

2. The automatic fixture for riveting and welding of a tool holder according to claim 1, characterized in that: The number of the lateral positioning units is two, the two lateral positioning units are arranged vertically at intervals, and the clamping cylinder (11) is arranged between the two lateral positioning units; There are two vertical positioning units, which are arranged in a spaced relationship in the transverse direction. A photoelectric sensor (22) for monitoring the presence of an inner tool holder (1) is also provided on the base (6) between the two vertical positioning units. The photoelectric sensor (22) is located outside the positioning area (21).

3. The automatic fixture for riveting and welding a tool holder according to claim 2, characterized in that: The two horizontal positioning blocks (7) and the two vertical positioning blocks (9) are respectively located at two adjacent side edges of the positioning area (21), and the two horizontal cylinders (8) and the two vertical cylinders are respectively located at two adjacent side edges of the positioning area (21).

4. The automatic fixture for riveting and welding a tool holder according to claim 1, characterized in that: The horizontal positioning block (7) comprises an L-shaped plate and a rib plate arranged on the L-shaped plate. The vertical positioning block (9) and the horizontal positioning block (7) have the same structure. The horizontal cylinder (8) comprises a cylinder body (81) and a horizontal push plate (82) controlled by the cylinder body (81). The vertical cylinder (10) comprises a cylinder body (101) and a vertical push plate (102) controlled by the cylinder body (101). A vertical push block (103) is arranged at one corner of the vertical push plate (102).

5. The automatic fixture for riveting and welding of a tool holder according to claim 1, characterized in that: The base (6) is a double-layer plate frame structure, the upper layer of the base (6) is provided with the lateral positioning unit, the vertical positioning unit and the vertical centering unit, and the lower layer of the base (6) is provided with a push cylinder (16) for driving the frame (12) to slide.

6. The automatic fixture for riveting and welding of a tool holder according to claim 5, characterized in that: On the other side of the base (6), a slide rail (15) is provided. The frame (12) is slidably arranged on the slide rail (15). The frame (12) extends downward to connect the pushing cylinder (16). The frame (12) is bent into an inverted "L" shape, and the front end of the frame (12) is bent upward and extends above the positioning area (21).

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