A type of fixed tooling

Abstract

This technical solution belongs to the field of fixture and tooling technology, specifically relating to a fixed fixture mounted on a rotatable turntable on a machine frame. It is used to clamp and position a workpiece in conjunction with an unlocking device. The fixture includes a support base with pressure-regulating parts on both sides; a fixed clamp with abutment parts extending from both sides corresponding to the pressure-regulating parts, which can switch between locked and unlocked states; and a limiting device including a limiting frame and an elastic element. The limiting frame slides relative to the support base, and the elastic element abuts against the limiting frame and the support base at both ends. The elastic force pushes the limiting frame against the fixed clamp, and the abutment parts tend to abut against the pressure-regulating parts, at which point the fixed clamp is in a locked state. Under the drive of the unlocking device, the support base and the limiting frame move, separating the abutment parts from the pressure-regulating parts, at which point the fixed clamp is in an unlocked state. The elastic element's buffering ensures smooth and precise operation, making it more convenient to use.

Description

Technical Field

[0001] This technical solution relates to the field of fixture and tooling technology, and specifically refers to a type of fixed tooling. Background Technology

[0002] Fixtures, also known as jigs and fixtures, are key tools used in mechanical manufacturing and processing to fix and position workpieces, ensuring that the workpieces maintain a stable and precise position during processing. They provide customized solutions for different workpiece shapes and processing requirements, improving processing accuracy, production efficiency, and ensuring operational safety.

[0003] In existing automated production lines organized around a rotary table, where multiple fixed fixtures are mounted on the rotary table and pass through multiple processing or assembly stations in sequence, maintaining consistent and precise positioning of all workpieces at each station becomes extremely difficult. Because different types of workpieces differ in their shape, size, and key positioning features (such as positioning holes and bolt connection holes), a fixture optimized for a specific workpiece often cannot be adapted to other workpieces. When it is necessary to switch workpiece models on the production line, operators have to frequently and manually adjust the positioning elements on the fixed fixtures according to the samples of the new workpieces, which is cumbersome and inconvenient to use. Summary of the Invention

[0004] This technical solution aims to improve the problem of cumbersome adjustments and inconvenience caused by the low efficiency of manual debugging in existing traditional fixed tooling in automated production lines, by providing a fixed tooling.

[0005] The purpose of this technical solution is achieved as follows:

[0006] A fixed fixture, mounted on a rotatable turntable mounted on a machine frame, is used to clamp and position a workpiece in conjunction with an unlocking device, comprising:

[0007] A support base is movably mounted on the turntable, and pressure-regulating parts are provided on both sides of the support base;

[0008] A fixed fixture is movably mounted on the support base and used to clamp the workpiece. The fixed fixture has abutment portions extending from both sides corresponding to the fixed pressure portion. The fixed fixture can switch between a locked state and an unlocked state.

[0009] The limiting device includes a limiting frame and an elastic element. The limiting frame is slidably engaged with the bearing base. The two ends of the elastic element abut against the limiting frame and the bearing base respectively. Its elastic force pushes the limiting frame against the fixed fixture, so that the abutting part tends to abut against the fixed pressure part. At this time, the fixed fixture is in a locked state.

[0010] Driven by the unlocking device, the support base and the limiting frame move together, causing the contact part to separate from the pressure-regulating part. At this time, the fixed fixture is in the unlocked state.

[0011] Through the above technical solution, when a fixed fixture is in normal use, during the operation process, the unlocking device drives the movement between the bearing base and the limiting frame, causing the bearing base to move upward relative to the limiting frame. Based on the fixed position of the limiting frame, the upward movement of the bearing base will compress the elastic element, separating the contact part and the pressure-fixing part. The fixed fixture clamps the sample block and moves freely to adjust to the predetermined position. When the locking drive releases the thrust, the bearing base falls and drives the fixed fixture to fall synchronously, gradually releasing the elastic element. The limiting frame abuts against the fixed fixture through the elastic element, and the elastic force causes the contact part to abut against the pressure-fixing part, thereby mechanically locking the fixed fixture and restricting its movement. The locking and unlocking of the fixed fixture is automatically controlled by the drive, reducing manual adjustment, improving operating efficiency, and the elastic element buffer ensures smooth and accurate operation, making it more convenient to use.

[0012] Preferably, the mounting fixture includes:

[0013] A base plate, which is disposed on the supporting base, the base plate having the pressure-regulating part;

[0014] A clamping drive component is disposed on the base plate;

[0015] Two gripper pieces are slidably disposed on the clamping drive piece. Each gripper piece has a plurality of clamping protrusions for abutting against the workpiece. The clamping drive piece drives the two gripper pieces to move closer to or further away from each other.

[0016] Through the above technical solution, the clamping drive receives a signal and drives the two grippers to slide horizontally towards each other along the plane. The clamping protrusions contact the workpiece to achieve clamping and provide clamping force. When moving in the opposite direction, the workpiece is released and clamping force is provided. The clamping protrusions adapt to different workpiece shapes, enhancing clamping stability and compatibility.

[0017] Preferably, the base plate is provided with a plurality of ball bearings for contacting the support base.

[0018] With the above technical solution, when the fixed fixture is unlocked, it contacts the surface of the bearing base through multiple balls at the bottom of the base plate. The balls convert sliding friction into rolling friction, making the base plate move more smoothly, reducing wear, improving motion accuracy and response speed, and making tooling adjustment faster and less labor-intensive.

[0019] Preferably, the end face of the pressure-regulating part near the abutting part has a toothed segment.

[0020] Through the above technical solution, when the fixed fixture is locked, the tooth segment has a sawtooth structure and provides multiple contact points, which enhances the locking reliability.

[0021] Preferably, the limiting frame includes an upper limiting block, two rods and a lower limiting block, with both ends of the rods connected to the upper limiting block and the lower limiting block respectively, and the elastic element sleeved on the rods. The bearing base has a limiting hole for the rods to pass through.

[0022] With the above technical solution, when the support base moves, the rod slides in the limiting hole, compressing or releasing the elastic element. The rod guides the direction of movement, and the elastic element provides buffering and restoring force, ensuring stable limiting, precise action, reducing impact, and extending service life.

[0023] Preferably, the support base is provided with a stop groove, the upper limit block is located in the stop groove to limit its movement, and the upper limit block is provided with an elastic pad, which is disposed on the side of the upper limit block near the abutment part.

[0024] Through the above technical solution, the upper limit block is embedded in the stop groove, and the groove wall restricts its lateral movement. When the elastic element pushes the upper limit block, it moves vertically up and down in the stop groove, providing a guiding path, avoiding skew, improving the limiting accuracy, preventing offset and jamming, and making the alignment of the abutment part and the constant pressure part more accurate. The elastic pad is fixed to the surface of the upper limit block and directly contacts the abutment part. When the upper limit block is pushed by the elastic element, it presses against the abutment part, and the elastic pad is compressed. As a buffer medium, the elastic pad can absorb the impact, reduce hard collisions, and make the pressure distribution uniform, reduce noise and wear, protect the contact surface, and improve the locking stability and contact reliability.

[0025] Preferably, the support base is provided with a tooling tray, the tooling tray is provided with a tooling base pad, and the tooling tray is detachably connected to the support base through a quick-release structure;

[0026] The quick-release structure includes a knob seat on the tooling tray, a knob component that rotates on the knob seat, and a locking seat on the support base. The knob component includes a knob head and a knob shaft. The knob shaft has a locking protrusion protruding along its circumference. The locking seat has a shaft hole for the knob shaft to pass through. The side wall of the shaft hole also has a locking groove that matches the locking protrusion.

[0027] When the knob shaft is inserted into the shaft hole, the locking protrusion passes through the locking groove accordingly, and the knob rotates to make the locking protrusion and the locking groove misalign.

[0028] With the above technical solution, during installation, the knob shaft is inserted into the shaft hole, and the locking protrusion passes through the locking groove. After rotating the knob, the locking protrusion and the locking groove are misaligned and locked. The locking protrusion abuts against the bearing base, thereby locking the tooling tray. During operation, during disassembly, the knob is rotated in the opposite direction to align the protrusion and the groove and pull it out. This enables quick installation and disassembly of the tooling tray, making it easy to replace and adapt to different workpieces and improving flexibility.

[0029] Preferably, the gripper has a protruding limiting part on its side, the support base has a corresponding limiting groove on its side for the limiting part to be inserted, and the tooling tray has a relief cavity corresponding to the limiting part.

[0030] With the above technical solution, when the two grippers close to clamp the workpiece, the limiting part is embedded in the limiting groove to limit the range of motion. The groove wall of the limiting groove restricts its lateral movement, and the clearance cavity provides the limiting part with room to move, avoiding interference. The limiting part and the limiting groove cooperate to guide the gripper and ensure linear movement. The tooling tray is compatible with its structure to prevent the gripper from over-moving or misaligning, thereby improving clamping accuracy and reliability.

[0031] Preferably, the support base is provided with a plurality of buffer pads.

[0032] Through the above technical solution, the support base moves downward and abuts against the turntable (such as a rotating disk) through multiple buffer pads. The buffer pads contact the external surface to absorb vibration and impact, reduce noise, reduce component wear, and improve the stability and service life of the tooling.

[0033] The key and beneficial technical effects of this technical solution compared to existing technologies are:

[0034] This technical solution controls the lifting and lowering of the support base by locking the drive component, thereby achieving the locking and unlocking of the fixed fixture: when rising, the fixture is unlocked and its position can be freely adjusted; when falling, the fixture is buffered and reset by the elastic component, so that the fixture can be smoothly and accurately restored to the locked state. The mechanical automatic operation replaces manual adjustment, improving positioning efficiency and ease of operation. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0036] Figure 2 This is a partial explosion diagram of this embodiment;

[0037] Figure 3 This is a partial exploded view of the support base and tooling tray in this embodiment;

[0038] Figure 4 This embodiment Figure 3 Overall structural diagram at point A;

[0039] Figure 5 This is a schematic diagram of the overall structure of the mounting fixture in this embodiment;

[0040] Figure 6 This is a partial explosion diagram of the limiting device in this embodiment;

[0041] Figure 7This is a partial cross-sectional view of this embodiment;

[0042] Figure 8 This is a schematic diagram of the overall structure of the fixed tooling, turning platform, and sample device in the embodiment.

[0043] Figure 9 This is a partially enlarged schematic diagram showing the fit between the fixed tooling and the turntable in an embodiment.

[0044] Figure 10 This is a schematic diagram of the overall structure of the fixture for gripping the machine housing in an embodiment.

[0045] Figure 11 This is a cross-sectional view of the transmission slider in the first position in this embodiment;

[0046] Figure 12 This is a cross-sectional view of the transmission slider in the second position in this embodiment.

[0047] Reference numerals: 1. Supporting base; 2. Fixture; 21. Base plate; 22. Clamping drive component; 23. Gripper; 231. Clamping protrusion; 3. Limiting device; 31. Limiting frame; 311. Upper limit block; 312. Rod; 313. Lower limit block; 32. Elastic component; 4. Locking drive component; 5. Pressure setting part; 6. Abutment part; 7. Ball bearing; 8. Tooth segment; 9. Limiting hole; 10. Elastic pad; 11. Stop groove; 12. Tooling support plate; 13. Tooling base plate pad; 14. Quick release structure; 141. Knob seat; 142. Knob component; 1421. Knob head; 1422. Knob shaft; 143. Locking seat; 15. Locking protrusion; 16. Shaft hole; 17. Locking groove; 18. Limiting part; 19. Limiting groove; 20. Relief cavity; 24. Buffer pad;

[0048] 25. Limiting boss; 251. Limiting protrusion; 26. Transmission assembly; 261. Base; 262. Transmission slider; 263. Transmission top block; 271. Pushing inclined surface one; 272. Positioning inclined surface two; 28. Guide inclined surface; 29. ​​Sample fixing device; 291. Sample fixing frame; 292. Sample fixing fixture; 293. Sample fixing module;

[0049] 100, Bogie; 200, Housing; 201, Through hole; 202, Model hole. Detailed Implementation

[0050] The specific implementation of this technical solution will be further described in detail below with reference to the accompanying drawings.

[0051] Example 1:

[0052] See Figure 1 , Figure 2 , Figure 8 and Figure 9A fixed fixture is mounted on a turntable 100 rotatably mounted on a machine frame. It is used to clamp workpieces in conjunction with an unlocking device. In this embodiment, the turntable 100 is rotatably mounted on the machine frame. The rotation of the turntable 100 causes the fixed fixture to pass through each workstation in sequence. The fixed fixture includes a support base 1, a fixed clamp 2, and at least two limiting devices 3. The support base 1 is slidably connected to the turntable 100 through a four-guide rod structure. Its sliding direction is vertical. The support base 1 is provided with four buffer pads 24, which are arranged one-to-one with the four guide rods. The buffer pads 24 abut against the support base 1 and the turntable 100, so that the support base 1 provides a buffering effect when moving toward the turntable 100. The fixed clamp 2 is movably mounted on the inner side of the support base 1. The two limiting devices 3 are respectively arranged on opposite sides of the lower part of the support base 1.

[0053] See Figure 3 and Figure 4 The support base 1 is provided with a tooling tray 12, which is located on the top of the support base 1. Two tooling base pads 13 are respectively installed on the top of the tooling tray 12. The tooling tray 12 is detachably connected to the tooling tray 12 through quick-release structures 14. Two quick-release structures 14 are provided. Each quick-release structure 14 includes a knob seat 141, a knob 142, and a locking seat 143. The knob seat 141 is fixed to the corner of the tooling tray 12, and its outer end has two markings for "ON" and "OFF" respectively. The knob 142 is rotatably set. The knob base 141 includes a knob head 1421 and a knob shaft 1422. Two locking protrusions 15 protrude from the end of the knob shaft 1422 away from the knob head 1421 along its circumference. The locking seat 143 is bolted to the support base 1 and its position corresponds to the knob base 141. The locking seat 143 is provided with a shaft hole 16 that matches the knob shaft 1422. The side wall of the shaft hole 16 is provided with a locking groove 17 that matches the locking protrusions 15. There are two locking grooves 17, and the two locking grooves 17 correspond one-to-one with the two locking protrusions 15.

[0054] During the installation of the tooling tray 12, the knob head 1421 of the knob 142 needs to point to the ON mark of the knob seat 141. The knob shaft 1422 is aligned with the shaft hole 16 and passed through. At the same time, the two locking protrusions 15 are aligned with the two locking grooves 17 and passed through. After installation, the knob 142 is rotated counterclockwise. At this time, the knob head 1421 switches to the OFF mark of the knob seat 141, and the knob shaft 1422 rotates accordingly in the shaft hole 16. At the same time, the positions of the two locking protrusions 15 and the two locking grooves 17 are misaligned. The two locking protrusions 15 axially abut against the inner sidewall of the support base 1 along the installation direction of the tooling tray 12, thereby realizing the quick connection between the support base 1 and the tooling tray 12. When disassembling, rotate in the opposite direction and align the locking protrusions 15 and the locking grooves 17 to pull it out, realizing the quick assembly and disassembly of the tooling tray 12 to replace different sizes and specifications.

[0055] See Figure 3 and Figure 5 The operating principle of the fixed fixture 2 can be referred to as the gripper cylinder, which is existing technology and will not be described in detail here. It includes a base plate 21, a clamping drive component 22 and two gripper components 23. The clamping drive component 22 is preferably a cylinder, which is fixedly installed on the upper end face of the base plate 21. The two gripper components 23 are slidably connected to the side of the clamping drive component 22 away from the base plate 21 through a slide rail slide block structure, and the sliding direction of the two is the same axis. Each gripper component 23 has two clamping protrusions 231 at its upper end. The clamping drive component 22 drives the two gripper components 23 to move synchronously along the plane horizontally towards each other. The two gripper components 23 approach each other, and the four clamping protrusions 231 simultaneously abut against the side surface of the workpiece to achieve stable clamping and positioning.

[0056] Each of the two gripper pieces 23 has a limiting part 18 protruding from its opposite side. The limiting part 18 has an inclined surface. The two sides of the support base 1 are provided with limiting grooves 19. The two limiting grooves 19 are provided one-to-one with the two limiting parts 18. The tooling tray 12 is provided with two relief cavities 20 corresponding to the two limiting parts 18. When the two gripper pieces 23 come together to clamp the workpiece, the limiting part 18 is embedded in the limiting groove 19 to limit the range of motion. The groove wall of the limiting groove 19 restricts its lateral movement. The relief cavity 20 provides the limiting part 18 with room to move and avoids interference.

[0057] The fixed fixture 2 is movably mounted on the support base 1. The base plate 21 is provided with a number of balls 7, which are installed on the lower end face of the base plate 21 away from the clamping drive member 22. The balls 7 are in contact with the corresponding surface of the support base 1, converting sliding friction into rolling friction, so that the base plate 21 can move smoothly. The support base 1 is provided with a pressure-fixing part 5 on both sides. The pressure-fixing part 5 is detachably connected to the support base 1 by bolts. The base plate 21 has abutment parts 6 on opposite sides, which are respectively provided with the pressure-fixing part 5. The lower end face of the pressure-fixing part 5 near the abutment part 6 has a toothed segment 8. The vertical movement of the fixed fixture 2 is limited between the pressure-fixing part 5 and the support base 1.

[0058] See Figure 3 , Figure 6 and Figure 7 Each limiting device 3 includes a limiting frame 31 and an elastic element 32. The limiting frame 31 is movably configured relative to the supporting base 1. The limiting frame 31 includes an upper limiting block 311, two rods 312, and a lower limiting block 313. The supporting base 1 is provided with a stop groove 11 that matches the upper limiting block 311. The upper limiting block 311 is confined within the stop groove 11 and its lateral movement is restricted by the groove wall of the stop groove 11. The upper limiting block 311 is provided with an elastic pad 10, preferably made of elastic material such as rubber. The pad 10 is bolted to one end of the upper limiting block 311 near the abutment part 6. On the side; the two ends of each rod 312 are respectively connected to the upper limit block 311 and the lower limit block 313. The bearing base 1 has two limiting holes 9. The two rods 312 pass through the two limiting holes 9 one by one. In this embodiment, a guide sleeve is fixed in the limiting hole 9 and the rod 312 passes through the guide sleeve. The elastic element 32 is sleeved on the rod 312 one by one. One end of the elastic element 32 abuts against the lower end face of the upper limit block 311 and the other end abuts against the corresponding upper end face of the bearing base 1. Its elasticity makes the limiting frame 31 have an upward sliding tendency.

[0059] See Figure 7 , Figure 11 and Figure 12The unlocking device includes a locking drive 4 and a limiting boss 25. The locking drive 4 is fixedly installed on the frame and located below the turntable 100, and is used to drive the carrier base 1 to move. The limiting boss 25 has a limiting cavity on its inner side for the free passage of the fixed tooling. The tops of the limiting boss 25 on both sides along the through direction of the limiting cavity extend into the limiting cavity with limiting protrusions 251. The locking drive 4 drives the carrier base 1 to move horizontally between the first position and the second position through the transmission assembly 26. In this embodiment, the transmission assembly 26 includes a seat 261, a transmission slider 262, and a transmission top block 263. The seat 261 is located inside the limiting boss 25 and is fixedly mounted on the frame. The transmission slider 262 is slidably connected to the upper end of the seat 261 through the slider groove structure. The transmission slider 262 has a first pushing inclined surface 271 and a second positioning inclined surface 272. The second positioning inclined surface 272 is located behind the first pushing inclined surface 271 along the sliding direction of the transmission slider 262. The transmission top block 263 is located above the transmission slider 262 and is movably mounted on the limiting boss 25. The direction of movement is limited to the vertical direction. The lower end face of the transmission top block 263 has a guide inclined surface 28 that matches the first pushing inclined surface 271 and the second positioning inclined surface 272.

[0060] After the support base 1 moves with the steering table 100 to align with the push position of the locking drive component 4, as... Figure 11 As shown, when the transmission slider 262 is in the first position, the pushing inclined surface 271 abuts against the guide inclined surface 28; when the fixed fixture 2 is in the locked state, the bearing base 1 falls by gravity, and the elastic element 32 pushes the limiting frame 31 to abut against the fixed fixture 2, so that the abutting part 6 abuts against the fixed pressure part 5, and the fixed fixture 2 cannot move through the ball 7.

[0061] During the process of the locking drive component 4 driving the transmission slider 262 to the second position, the pushing inclined surface 271 uses the inclined surface to push the transmission top block 263 upward until the transmission top block 263 is in the second position, as Figure 12 As shown, at this time, the positioning inclined surface 272 abuts against the guide inclined surface 28, and the transmission top block 263 pushes the bearing base 1 and the fixed fixture 2 to move upward synchronously. Based on the upper end face of the lower limit block 313 abutting against the lower end face of the limit protrusion 251, the maximum range of the upward movement of the limit frame 31 is limited. The bearing base 1 continues to move upward relative to the limit frame 31, and the span distance α between the upper limit block 311 and the corresponding end face of the bearing base 1 decreases, so that the elastic element 32 is compressed. The span distance β between the upper limit block 311 and the abutting part 6 increases. At this time, the fixed fixture 2 switches to the unlocked state, the abutting part 6 separates from the fixed pressure part 5, and the fixed fixture 2 can move freely through the ball 7 to adjust to the predetermined position.

[0062] See Figure 8 and Figure 10This embodiment also demonstrates a sample fixing device 29 mounted on the frame, comprising a sample fixing frame 291, a sample fixing fixture 292, a sample fixing module 293, and a sample fixing drive. The sample fixing frame 291 is mounted above the turntable. The sample fixing fixture 292 is slidably connected to the side of the lower end of the sample fixing frame 291 via a guide rail slider structure. The sample fixing drive is fixedly mounted on the sample fixing frame 291 and is used for the horizontal movement of the sample fixing fixture 292. The lower end of the sample fixing fixture 292 holds the sample fixing module 293. The sample fixing module 293 has four model holes 202 at its four corners. In practice, the sample fixing fixture 292 drives the sample fixing module 293 to move. The clamping mechanism moves to the designated position between the two open gripper pieces 23, at which point the mounting fixture 2 needs to be in the unlocked state. Then, the two gripper pieces 23 move towards each other to clamp the sample fixing module 293, the mounting fixture 2 switches to the locked state, the two gripper pieces 23 release the sample fixing module 293, and the sample fixing module 293 retracts, ensuring that the subsequently loaded housing 200 has four through holes 201 at its four corners. After the housing 200 is clamped, the positions of its four through holes 201 correspond one-to-one with the positions of its four model holes 202, which facilitates the accurate insertion of bolts by the subsequent automated device without additional positioning steps, thus improving assembly accuracy and efficiency.

[0063] The specific work process of this plan is as follows:

[0064] This technical solution uses a locking drive 4 to drive the support base 1 to move upward vertically. Based on the limiting frame 31, the lower limiting block 313 abuts against the limiting protrusion 251 to restrict the upward movement. The support base 1 moves upward to compress the elastic element 32, and the abutting part 6 separates from the pressure-fixing part 5. The fixed fixture 2 holds the sample and can move freely to adjust to the predetermined position. When the locking drive 4 releases the thrust, the support base 1 falls and drives the fixed fixture 2 to fall synchronously, gradually releasing the elastic element 32. The limiting frame 31 abuts against the fixed fixture 2 through the elastic element 32. The elastic force causes the abutting part 6 to abut against the pressure-fixing part 5, thereby mechanically locking the fixed fixture 2 and restricting its movement. The locking and unlocking of the fixed fixture 2 is automatically controlled by the drive, reducing manual adjustment and improving operating efficiency. The elastic element 32 buffers and ensures smooth and accurate movement, making it more convenient to use.

[0065] Example 2:

[0066] In this embodiment, the difference from the fixing fixture in Embodiment 1 lies in the structure and function of the unlocking device. The unlocking device includes an unlocking seat, a locking drive 4, and a limiting boss 25 movably disposed on the unlocking seat. The inner side of the limiting boss 25 has a limiting cavity for the fixing fixture to pass freely. The tops of the limiting boss 25 on both sides along the through direction of the limiting cavity extend into the limiting cavity with limiting protrusions 251. There are four limiting protrusions 251, which correspond one-to-one with the two ends of the two lower limiting blocks 313. The locking drive 4 drives the limiting boss 25 to descend, causing the four limiting protrusions 251 to press down on the four corresponding lower limiting blocks 313, thereby driving the two limiting frames 31 to move down synchronously. The limiting frames 31 and the bearing base 1 move relative to each other, and the upper limiting block 311 compresses the elastic member 32. The abutment part 6 separates from the pressure-fixing part 5, thereby unlocking the fixing fixture 2.

[0067] The foregoing has shown and described the basic principles, main features, and advantages of this technical solution. Those skilled in the art should understand that this technical solution is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this technical solution. Various changes and modifications can be made to this technical solution without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed technical solution. The scope of protection of this technical solution is defined by the appended claims and their equivalents.

Claims

1. A fixed fixture, mounted on a turntable (100) rotatably mounted on a machine frame, for clamping and positioning a workpiece in conjunction with an unlocking device, the unlocking device comprising a locking drive (4) and a limiting boss (25), wherein the limiting boss (25) has a limiting cavity on its inner side for the fixed fixture to pass through, and the top ends of the limiting boss (25) on both sides extending inward along the through direction of the limiting cavity have limiting protrusions (251), characterized in that, include: A support base (1) is movably mounted on the turntable (100), and pressure-regulating parts (5) are provided on both sides of the support base (1). A fixed fixture (2) is movably mounted on the bearing base (1) and used to clamp the workpiece. The fixed fixture (2) has abutment portions (6) on both sides that are corresponding to the fixed pressure portion (5). The fixed fixture (2) can switch between a locked state and an unlocked state. The limiting device (3) includes a limiting frame (31) and an elastic element (32). The limiting frame (31) is slidably engaged with the bearing base (1). The limiting frame (31) includes an upper limiting block (311), two rods (312), and a lower limiting block (313). The two ends of the rods (312) are respectively connected to the upper limiting block (311) and the lower limiting block (313). The bearing base (1) is provided with a stop groove (11). The upper limiting block (311) is located in the stop groove (11) to limit the movement. The upper limit block (311) is provided with an elastic pad (10), which is located on the side of the upper limit block (311) near the abutment part (6). The bearing base (1) is provided with a limiting hole (9) for the rod body (312) to pass through. The elastic element (32) is sleeved on the rod body (312). The elastic force of the elastic element (32) pushes the upper limit block (311) to abut against the abutment part (6), so that the abutment part (6) has a tendency to abut against the pressure part (5). At this time, the fixed fixture (2) is in a locked state. When the locking drive (4) drives the bearing base (1) to move, the lower limit block (313) abuts against the limit protrusion (251) and the bearing base (1) moves upward relative to the limit frame (31), so that the abutting part (6) separates from the pressure part (5). At this time, the fixed fixture (2) is in the unlocked state. Alternatively, when the locking drive (4) drives the limiting boss (25) to move, the limiting boss (25) drives the lower limiting block (313) through the limiting protrusion (251), and the limiting frame (31) moves downward relative to the bearing base (1), so that the abutting part (6) separates from the pressure-fixing part (5), and at this time the fixed mounting fixture (2) is in the unlocked state.

2. The fixing fixture according to claim 1, characterized in that: The fixed mounting fixture (2) includes: A base plate (21) is disposed on the support base (1), the base plate (21) having the abutment portion (6); A clamping drive (22) is disposed on the base plate (21); Two gripper pieces (23) are slidably disposed on the clamping drive member (22). The gripper pieces (23) are provided with a plurality of clamping protrusions (231) for abutting against the workpiece. The clamping drive member (22) drives the two gripper pieces (23) to move closer to or further away from each other.

3. The fixed tooling according to claim 2, characterized in that: The base plate (21) is provided with a plurality of ball bearings (7) for contacting the support base (1).

4. The fixing fixture according to claim 1, characterized in that: The pressure-regulating part (5) has a toothed segment (8) on its end face near the abutting part (6).

5. A fixing fixture according to claim 2, characterized in that: The support base (1) is provided with a tooling tray (12), the tooling tray (12) is provided with a tooling base pad (13), and the tooling tray (12) is detachably connected to the support base (1) through a quick-release structure (14). The quick-release structure (14) includes a knob seat (141) disposed on the tooling tray (12), a knob component (142) rotating on the knob seat (141), and a locking seat (143) disposed on the support base (1). The knob component (142) includes a knob head (1421) and a knob shaft (1422). The knob shaft (1422) has a locking protrusion (15) protruding along its circumference. The locking seat (143) has a shaft hole (16) for the knob shaft (1422) to pass through. The side wall of the shaft hole (16) also has a locking groove (17) matching the locking protrusion (15). When the knob shaft (1422) is inserted into the shaft hole (16), the locking protrusion (15) passes through the locking groove (17) accordingly, and the knob (142) rotates so that the locking protrusion (15) is misaligned with the locking groove (17).

6. A fixed tooling according to claim 5, characterized in that: The gripper (23) has a protruding limiting part (18) on its side, and the supporting base (1) has a corresponding limiting groove (19) for the limiting part (18) to be inserted into. The tooling tray (12) has a relief cavity (20) corresponding to the limiting part (18).

7. A fixed tooling according to claim 1, characterized in that: The support base (1) is provided with several buffer pads (24).

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