A gantry tooling

Abstract

The application provides a gantry tool and relates to the technical field of machining, which comprises a workbench, a moving base and a tool body, the surface of the workbench is provided with a moving limiting mechanism, the moving base is installed on the surface of the moving limiting mechanism, the tool body is fixedly connected to the upper surface of the moving base, and the moving limiting mechanism is used for limiting and moving the tool body. The inner wall of a T-shaped clamp groove of the tool body is provided with a shallow rectangular accommodation groove, the chip removal gas holes are symmetrically and evenly arranged in a tilting manner, a directional airflow channel is formed, the chip removal mechanism is arranged, automatic air supply is realized through the transmission mechanism, the airflow is accurately conveyed to the chip removal gas holes through the gas conveying connecting pipe and the exhaust hose, the cuttings generated during machining can be quickly discharged from the accommodation groove, the problem of cuttings accumulation in the conventional T-shaped groove is solved, the accommodation groove provides sufficient installation space for the clamp, interference between the clamp and the groove body is avoided, and smooth tool operation is ensured.

Description

Technical Field

[0001] This invention relates to the field of machining technology, specifically to a gantry tooling. Background Technology

[0002] In the field of machining, gantry fixtures, as core equipment for workpiece fixation and machining positioning, are widely used in precision machining scenarios for various parts. Existing gantry fixtures typically consist of a worktable, a base, and slide rails. The worktable is mounted on the base via slide rails and is driven by a lead screw mechanism. T-slots are provided on the upper and side surfaces of the worktable to meet the basic requirements for workpiece fixation, positioning, and fixture adaptation.

[0003] However, traditional gantry fixtures have the following drawbacks in practical applications: First, metal chips generated during machining tend to accumulate in the T-slot, making them difficult to remove quickly. This not only affects the flexible adjustment of the fixture but may also scratch the workpiece surface or damage the cutting tool, reducing machining quality. Second, the T-slot's structural design lacks clearance space, making it easy for the fixture to interfere with the slot during installation and adjustment, causing the fixture to jam and affecting machining efficiency. At the same time, the existing fixture positioning methods are relatively simple, making it difficult to achieve multi-directional stable fixation. Lateral vibrations and stresses are easily generated during machining, causing positioning offset and thus affecting machining accuracy. Summary of the Invention

[0004] The purpose of this invention is to provide a gantry fixture. To achieve the above purpose, this invention provides the following technical solution: A gantry fixture includes a worktable, a movable base, and a fixture body. A movable limiting mechanism is provided on the surface of the worktable. The movable base is installed on the surface of the movable limiting mechanism. The fixture body is fixedly connected to the upper surface of the movable base. The movable limiting mechanism is used to limit and move the fixture body.

[0005] The surface of the workbench is provided with a chip removal mechanism and a transmission mechanism. The tooling body is U-shaped, and several T-shaped clamping slots are provided on the upper surface and the left and right sides of the tooling body. The inner wall of the T-shaped clamping slots is provided with shallow rectangular clearance slots.

[0006] Preferably, the workbench has limit mounting slots on both the left and right sides. The moving limit mechanism includes a threaded rod rotatably connected to the inner wall of the limit mounting slot. A moving block is threadedly connected to the surface of the threaded rod. A mounting plate is fixedly connected to the upper surface of each of the two moving blocks. A mounting hole is opened on the surface of the mounting plate. An adjusting screw is rotatably connected to the inner wall of the mounting hole. An adjusting block is threadedly connected to the surface of the adjusting screw. A positioning block is fixedly connected to the upper surface of the adjusting block.

[0007] Preferably, the surface of the movable base has two positioning holes, the positions of the positioning holes correspond to the positioning blocks, and the size of the positioning holes matches the positioning blocks. The positioning blocks are inserted into the inner wall of the positioning holes, and the front and rear surfaces of the adjusting block are fixedly connected to the supporting base blocks.

[0008] Preferably, the transmission mechanism includes a transmission box fixed to the back of the worktable, a drive motor fixedly connected to the inner wall of the transmission box, a drive gear fixedly connected to the rotating shaft of the drive motor, the rear ends of the two threaded rods extending into the interior of the transmission box, and worm gears fixedly connected to the surface of the threaded rods, a transmission shaft rotatably connected between the left and right inner walls of the transmission box, two worms fixedly connected to the surface of the transmission shaft, the position of the worm gear corresponding to the worm, and the worm meshing with its corresponding worm gear.

[0009] Preferably, a driven gear is fixedly connected to the surface of the transmission shaft, the driven gear is positioned corresponding to the drive gear, the drive gear meshes with the driven gear, a first synchronous pulley is fixedly connected to the surface of the transmission shaft, a fixed frame is fixedly connected to the upper surface of the worktable, a linkage shaft is rotatably connected to the inner surface of the fixed frame, a second synchronous pulley is fixedly connected to the surface of the linkage shaft, the second synchronous pulley is located directly above the first synchronous pulley, and a transmission belt is installed between the first synchronous pulley and the second synchronous pulley.

[0010] Preferably, the chip removal mechanism includes an exhaust pipe fixedly connected to the upper surface of the fixed frame, a piston disc slidably disposed on the inner wall of the exhaust pipe, a movable push rod fixedly connected to the center of the lower surface of the piston disc, the bottom end of the movable push rod extending to the outside of the exhaust pipe, and a linkage frame rotatably connected to the bottom end of the movable push rod, a linkage disc fixedly connected to the end of the linkage shaft, and the bottom end of the linkage frame rotatably connected to the surface of the linkage disc through a rotating shaft.

[0011] Preferably, an air inlet pipe is fixedly embedded on the back of the exhaust pipe, an exhaust connecting pipe is fixedly embedded on the upper surface of the exhaust pipe, an exhaust hose is fixedly connected to the end of the exhaust connecting pipe, the chip removal mechanism also includes a plurality of chip removal air holes opened in the inner wall of the clearance groove, and an air supply connecting pipe fixedly embedded in the bottom of the tooling body, and the end of the exhaust hose away from the exhaust connecting pipe is threadedly connected to the air inlet end of the air supply connecting pipe.

[0012] Preferably, a plurality of the chip removal air holes are evenly distributed in an inclined manner on the inner wall of the relief groove, and a plurality of chip removal air holes are symmetrically distributed on the left and right inner side walls of the relief groove.

[0013] Preferably, a guide rod is fixedly connected to the side of the support base block, and a guide through hole matching the guide rod is opened on the surface of the mounting plate. The guide rod is slidably connected to the surface of the mounting plate through the guide through hole, and an adjusting nut is fixed to the end of the adjusting screw.

[0014] Preferably, a one-way intake valve is fixed to the intake end of the intake pipe, and a one-way exhaust valve is fixedly connected to the surface of the exhaust connection pipe.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] (1) This device forms a directional airflow channel by opening a shallow rectangular clearance groove in the inner wall of the T-shaped fixture groove of the tooling body, combined with inclined, evenly distributed and symmetrically arranged chip removal air holes. By setting up a chip removal mechanism and then linking it with the transmission mechanism, automatic air supply is realized. The airflow is accurately delivered to the chip removal air holes through the air supply connection pipe and exhaust hose, which can quickly discharge the chips generated during processing from the clearance groove, completely solving the problem of chip accumulation in conventional T-slots. At the same time, the clearance groove provides sufficient installation space for the fixture, effectively avoiding interference between the fixture and the groove, and ensuring smooth operation of the tooling. The transmission mechanism can drive the moving limit mechanism to move the tooling body, and can also drive the piston disc of the chip removal mechanism to reciprocate, realizing the automatic generation of chip removal airflow. No additional chip removal drive device is required, which simplifies the equipment structure, reduces energy consumption, and realizes the coordinated operation of positioning movement and chip removal, improving the overall processing efficiency.

[0017] (2) The fixture body of this device is U-shaped, with T-shaped clamping slots on the upper surface and both sides, which can fix and position the workpiece from multiple directions, greatly enhancing the stability of the workpiece installation and reducing lateral vibration and stress during processing. The moving limit mechanism achieves precise limiting and movement of the fixture body through the precise cooperation between the positioning block and the positioning hole of the moving base, combined with the dual adjustment of the threaded rod and the adjusting screw, further improving the positioning accuracy of the workpiece and avoiding quality defects caused by positioning offset during processing. Attached Figure Description

[0018] Figure 1 This is a front view structural diagram of the present invention;

[0019] Figure 2 This is a side view of the structure of the present invention;

[0020] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0021] Figure 4 This is a schematic diagram of the internal structure of the T-shaped clamp groove of the present invention;

[0022] Figure 5 for Figure 4Enlarged structural diagram at point B;

[0023] Figure 6 This is a side sectional view of the exhaust stack structure of the present invention;

[0024] Figure 7 This is a schematic diagram of the rear view structure of the present invention;

[0025] Figure 8 for Figure 7 A magnified structural diagram at point C.

[0026] In the diagram: 1. Worktable; 2. Movable base; 3. Tooling body; 4. Movable limit mechanism; 5. Chip removal mechanism; 6. Transmission mechanism;

[0027] 201. Positioning hole;

[0028] 101. Limiting mounting slot; 102. Fixing bracket;

[0029] 301. T-shaped clamp groove; 302. Relief groove;

[0030] 401. Threaded rod; 402. Moving block; 403. Mounting plate; 404. Adjusting screw; 405. Adjusting block; 406. Positioning block; 407. Support base block; 408. Guide rod;

[0031] 501. Exhaust pipe; 502. Piston disc; 503. Movable push rod; 504. Linkage frame; 505. Chip discharge port; 506. Air supply connection pipe; 507. Intake pipe; 508. Exhaust connection pipe; 509. Exhaust hose;

[0032] 601. Transmission box; 602. Drive motor; 603. Drive gear; 604. Worm gear; 605. Transmission shaft; 606. Worm; 607. Driven gear; 608. First synchronous pulley; 609. Linkage shaft; 610. Second synchronous pulley; 611. Transmission belt; 612. Linkage disc. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figures 1-8This invention provides a technical solution: a gantry fixture, including a worktable 1. The upper surface of the worktable 1 has symmetrically arranged elongated limiting mounting grooves 101 on both the left and right sides. These limiting mounting grooves 101 provide a stable installation space and motion guide for the movable limiting mechanism 4. A movable base 2 is horizontally laid above the movable limiting mechanism 4. The fixture body 3 is securely installed on the upper surface of the movable base 2 via a fixed connection, achieving position adjustment and limiting fixation synchronously with the movable base 2.

[0035] Please see Figures 2 to 6 The fixture body 3 has a U-shaped structure, with several T-shaped fixture slots 301 evenly distributed on its upper surface and left and right sides. The T-shaped fixture slots 301 are used to adapt to various standard fixtures to meet diverse workpiece fixing requirements. Each T-shaped fixture slot 301 has a shallow rectangular clearance groove 302 at the bottom of its inner wall. The clearance groove 302 is connected to the T-shaped fixture slot 301, providing clearance space for fixture installation and serving as a channel for chip discharge.

[0036] The surface of the workbench 1 is also integrated with a chip removal mechanism 5 and a transmission mechanism 6. The main body of the transmission mechanism 6 is fixed to the back of the workbench 1, and the fixing frame 102 is vertically fixed to the edge of the workbench 1. It is linked with the transmission mechanism 6 through the transmission belt 611, and at the same time, it forms an airflow passage with the air supply connection pipe 506 at the bottom of the tooling body 3 through the exhaust hose 509.

[0037] Please see Figures 3 to 7 The movable limiting mechanism 4 includes a threaded rod 401. Both ends of the threaded rod 401 are rotatably connected between the front and rear inner walls of the limiting mounting groove 101 via bearings. Its axis is aligned with the length direction of the limiting mounting groove 101, ensuring stable rotation of the threaded rod 401. A movable block 402 is fitted onto the surface of the threaded rod 401 through a threaded hole, forming a threaded transmission engagement. When the threaded rod 401 rotates, the movable block 402 can smoothly slide within the limiting mounting groove 101 along the axial direction of the threaded rod 401. Mounting plates 403 are bolted to the upper surfaces of both movable blocks 402.

[0038] A through-hole is provided on the surface of the mounting plate 403. An adjusting screw 404 is rotatably connected to the inner wall of the mounting hole via a bearing. The axis of the adjusting screw 404 is aligned with the length direction of the mounting plate 403, and one end extends to the outer side of the mounting plate 403, with an adjusting nut fixed at the end for easy rotation by the operator using tools. An adjusting block 405 is threaded onto the surface of the adjusting screw 404. A positioning block 406 is vertically fixed to the upper surface of the adjusting block 405. The positioning block 406 has a cuboid structure, and its position corresponds to the positioning hole 201 on the surface of the movable base 2.

[0039] Please see Figures 4 to 6 A support base 407 is fixedly connected to both the front and rear surfaces of the adjusting block 405. The lower surface of the support base 407 is in contact with the upper surface of the mounting plate 403, forming a sliding support fit, which effectively disperses the force on the adjusting block 405 and prevents the adjusting block 405 from tilting during movement. A guide rod 408 is fixedly connected to the outer surface of the support base 407. The axis of the guide rod 408 is parallel to the axis of the adjusting screw 404. A guide through hole matching the diameter of the guide rod 408 is opened on the surface of the mounting plate 403. The end of the guide rod 408 away from the support base 407 passes through the guide through hole and extends to the outer side of the mounting plate 403, forming a sliding guide structure to ensure that the adjusting block 405 moves smoothly in a straight line under the drive of the adjusting screw 404 and avoids deflection.

[0040] When it is necessary to limit and fix the tooling body 3, rotating the adjusting nut drives the adjusting screw 404 to rotate. Under the guidance of the guide rod 408, the adjusting block 405 moves along the adjusting screw 404, thereby driving the positioning block 406 to accurately insert into the positioning hole 201 of the moving base 2. Through the engagement of the positioning block 406 and the positioning hole 201, the moving base 2 and the mounting plate 403 are relatively fixed, thus stably limiting the tooling body 3 to the current position. The threaded rod 401 enables a wide range of position adjustment of the tooling body 3, the adjusting screw 404 enables precise positioning, and the tight engagement of the positioning block 406 and the positioning hole 201 ensures the reliability of the limiting and effectively prevents the tooling body 3 from shifting during processing. At the same time, the design of the guide rod 408 and the support block 407 improves the stability of the adjustment process and ensures the positioning accuracy.

[0041] Please see Figures 1 to 5 The transmission mechanism 6 includes a transmission box 601, which is bolted to the back of the worktable 1. The transmission box 601 has a rectangular box-like structure and forms a closed transmission space inside, protecting the internal transmission components from external interference. A drive motor 602 is bolted to the bottom of the inner wall of the transmission box 601. Its rotation shaft is horizontally oriented, and a drive gear 603 is fixedly connected to its end. The drive gear 603 rotates synchronously with the rotation shaft of the drive motor 602.

[0042] The drive shaft 605 is rotatably connected between the left and right inner walls of the transmission box 601 via bearings. Its axis is parallel to the axis of the drive motor 602. Two worm gears 606 and a driven gear 607 are fixedly sleeved on the surface of the drive shaft 605. The driven gear 607 is located between the two worm gears 606 and corresponds to the position of the drive gear 603. The drive gear 603 and the driven gear 607 mesh with each other to form a gear transmission. The rear ends of the two threaded rods 401 pass through the rear inner wall of the limiting mounting groove 101 and extend into the interior of the transmission box 601. The ends of the threaded rods 401 inside the transmission box 601 are fixedly sleeved with worm wheels 604. The worm wheels 604 correspond one-to-one with the worm gears 606 on the drive shaft 605, and the worm gears 606 mesh with the corresponding worm wheels 604.

[0043] Please see Figures 3 to 8 A linkage shaft 609 is rotatably connected to the inner side of the fixed frame 102 on the upper surface of the worktable 1 via bearings. The axis of the linkage shaft 609 is parallel to the axis of the transmission shaft 605. One end of the linkage shaft 609 extends to the outer side of the fixed frame 102, and a linkage disc 612 is fixedly connected to the end. A first synchronous pulley 608 is fixedly sleeved on the surface of the transmission shaft 605, and a second synchronous pulley 610 is fixedly sleeved on the surface of the linkage shaft 609. The second synchronous pulley 610 is located directly above the first synchronous pulley 608, and their grooves correspond to each other. A transmission belt 611 is sleeved between the first synchronous pulley 608 and the second synchronous pulley 610 to form a synchronous transmission structure.

[0044] The transmission mechanism 6 is powered by a single drive motor 602. The drive gear 603 and driven gear 607 mesh to drive the transmission shaft 605 to rotate. The transmission shaft 605 drives the two threaded rods 401 to rotate synchronously through the meshing of the worm gear 606 and worm wheel 604, realizing the coordinated action of the moving limit mechanism 4 and ensuring the smooth movement of the tooling body 3. On the other hand, the linkage shaft 609 is driven to rotate through the cooperation of the first synchronous pulley 608, the transmission belt 611 and the second synchronous pulley 610, providing power for the chip removal mechanism 5. This simplifies the equipment structure and reduces energy consumption.

[0045] Please see Figures 3 to 7The chip removal mechanism 5 is used to quickly remove chips generated during processing, preventing chip accumulation from affecting machining accuracy. It mainly includes an exhaust pipe 501, which is bolted to the upper surface of the mounting bracket 102. The exhaust pipe 501 has a cylindrical structure with a hollow interior. A piston disc 502 is slidably mounted on the inner wall of the exhaust pipe 501, and its outer wall is tightly fitted with the inner wall of the exhaust pipe 501 to form a sealed fit, ensuring effective compression and propulsion of the gas. A movable push rod 503 is vertically fixed at the center of the lower surface of the piston disc 502. The bottom end of the movable push rod 503 passes through the bottom wall of the exhaust pipe 501 and extends to the outside of the exhaust pipe 501. A sealing sleeve is provided between the movable push rod 503 and the bottom wall of the exhaust pipe 501 to ensure airtightness.

[0046] The bottom end of the movable push rod 503 is rotatably connected to the linkage frame 504 via a rotating shaft. The bottom end of the linkage frame 504 is rotatably connected to the edge of the linkage disc 612 via the rotating shaft. When the linkage disc 612 rotates, the movable push rod 503 can be driven to reciprocate up and down via the linkage frame 504. An air inlet pipe 507 is fixedly embedded on the back of the exhaust pipe 501. One end of the air inlet pipe 507 communicates with the internal cavity of the exhaust pipe 501, and the other end extends to the outside of the transmission box 601. A one-way air inlet valve is fixedly installed at the air inlet end of the air inlet pipe 507 to ensure that gas can only enter the interior of the exhaust pipe 501 from the outside and cannot flow out in the opposite direction.

[0047] Please see Figures 1 to 6 An exhaust connecting pipe 508 is fixedly embedded on the upper surface of the exhaust cylinder 501. One end of the exhaust connecting pipe 508 communicates with the internal cavity of the exhaust cylinder 501, and the other end extends to the top of the exhaust cylinder 501. A one-way exhaust valve is fixedly installed on the surface of the exhaust connecting pipe 508 to ensure that the gas inside the exhaust cylinder 501 can only be discharged through the exhaust connecting pipe 508, avoiding backflow. An exhaust hose 509 is fixedly connected to the end of the exhaust connecting pipe 508. The exhaust hose 509 has good flexibility to adapt to changes in the position of the tooling body 3.

[0048] Chip removal vents 505 are formed on the inner wall of the clearance groove 302. Several chip removal vents 505 are evenly distributed in an inclined manner and symmetrically distributed on the left and right inner side walls of the clearance groove 302. The inclined direction is towards the opening of the T-shaped clamp groove 301, ensuring that the airflow can accurately act on the chip accumulation area. An air supply connection pipe 506 is fixedly embedded in the bottom of the tooling body 3. One end of the air supply connection pipe 506 is connected to the chip removal vents 505, and the other end extends to the bottom of the tooling body 3. The end of the exhaust hose 509 away from the exhaust connection pipe 508 is fixed to the air inlet end of the air supply connection pipe 506 by a threaded connection, forming a complete airflow passage.

[0049] Please see Figures 2 to 6The chip removal mechanism 5 converts the rotational motion of the linkage shaft 609 into the reciprocating linear motion of the movable push rod 503 via the linkage frame 504, driving the piston disc 502 to slide up and down within the exhaust pipe 501, thus achieving the intake and exhaust actions. During intake, the one-way intake valve opens, and external gas enters the exhaust pipe 501 through the intake pipe 507; during exhaust, the one-way exhaust valve opens, and compressed gas is transported to the chip removal air hole 505 through the exhaust connecting pipe 508, exhaust hose 509, and air supply connecting pipe 506, and finally ejected in the form of a directional airflow. The inclined and symmetrically distributed chip removal air holes 505 can form a purging force, quickly discharging the chips in the T-shaped fixture groove 301 from the relief groove 302, completely solving the problem of chip accumulation in conventional T-shaped grooves; at the same time, the relief groove 302 provides sufficient installation clearance space for the fixture, effectively avoiding interference between the fixture and the groove, ensuring the smooth operation of the tooling, and further improving processing efficiency.

[0050] Working Principle: The operator first selects a suitable fixture based on the size and shape of the workpiece and installs it in the T-shaped fixture slot 301 of the fixture body 3. The multi-directional design of the T-shaped fixture slot 301 allows the fixture to be fixed from above and from both sides of the workpiece, achieving multi-directional clamping and effectively enhancing the workpiece's installation stability. When the processing position of the fixture body 3 needs to be adjusted, the drive motor 602 is started. The rotating shaft of the drive motor 602 drives the drive gear 603 to rotate. The drive gear 603, through meshing with the driven gear 607, drives the transmission shaft 605 to rotate synchronously. When the transmission shaft 605 rotates, the two worm gears 606 on its surface mesh with the corresponding worm wheels 604, driving the two threaded rods 401 to rotate simultaneously. Since the threaded rod 401 and the moving block 402 form a threaded transmission engagement, and the moving block 402 is constrained by the limiting mounting groove 101, the rotation of the threaded rod 401 is converted into the linear movement of the moving block 402 along the limiting mounting groove 101, thereby driving the mounting plate 403, the adjusting block 405 and the moving base 2 to move synchronously, thereby realizing the position adjustment of the tooling body 3.

[0051] During workpiece machining, the drive motor 602 runs continuously, ensuring the tooling body 3 maintains a stable position while providing power to the chip removal mechanism 5. When the transmission shaft 605 rotates, its first synchronous pulley 608 drives the second synchronous pulley 610 to rotate via the transmission belt 611, which in turn drives the linkage shaft 609 to rotate synchronously. The linkage disc 612 at the end of the linkage shaft 609 rotates with the linkage shaft 609. Since one end of the linkage frame 504 is rotatably connected to the edge of the linkage disc 612 and the other end is rotatably connected to the bottom end of the movable push rod 503, the rotational motion of the linkage disc 612 is converted into the up-and-down reciprocating motion of the movable push rod 503. When the movable push rod 503 moves upward, it drives the piston disc 502 to slide upward within the exhaust cylinder 501. This increases the volume of the internal cavity of the exhaust cylinder 501, reduces the air pressure, and opens the one-way intake valve, allowing external gas to be drawn into the exhaust cylinder 501 through the intake pipe 507. When the movable push rod 503 moves downward, it drives the piston disc 502 to slide downward, reducing the volume of the internal cavity of the exhaust cylinder 501. This compresses the gas, increases the air pressure, and opens the one-way exhaust valve. The compressed gas enters the exhaust hose 509 through the exhaust connection pipe 508, and is then transported to each chip removal port 505 through the air supply connection pipe 506. The chip removal ports 505 are symmetrically distributed at an angle. The directional airflow directly acts on the chips in the T-shaped fixture groove 301, quickly blowing the chips out of the clearance groove 302, ensuring a clean machining area and preventing chips from affecting the workpiece machining accuracy.

Claims

1. A gantry fixture, comprising a worktable (1), a movable base (2), and a fixture body (3), characterized in that: The surface of the workbench (1) is provided with a moving limiting mechanism (4), the moving base (2) is installed on the surface of the moving limiting mechanism (4), the tool body (3) is fixedly connected to the upper surface of the moving base (2), and the moving limiting mechanism (4) is used to limit and move the tool body (3). The surface of the workbench (1) is provided with a chip removal mechanism (5) and a transmission mechanism (6). The tool body (3) is U-shaped, and a number of T-shaped clamping slots (301) are provided on the upper surface and the left and right sides of the tool body (3). The inner wall of the T-shaped clamping slot (301) is provided with a shallow rectangular clearance slot (302).

2. The gantry fixture according to claim 1, characterized in that: The workbench (1) has a limit mounting groove (101) on both the left and right sides. The moving limit mechanism (4) includes a threaded rod (401) rotatably connected to the inner wall of the limit mounting groove (101). The surface of the threaded rod (401) is threaded with a moving block (402). The upper surfaces of the two moving blocks (402) are fixedly connected with mounting plates (403). The surface of the mounting plate (403) is provided with mounting holes. The inner wall of the mounting holes is rotatably connected with an adjusting screw (404). The surface of the adjusting screw (404) is threaded with an adjusting block (405). The upper surface of the adjusting block (405) is fixedly connected with a positioning block (406).

3. The gantry fixture according to claim 2, characterized in that: The surface of the movable base (2) has two positioning holes (201). The position of the positioning hole (201) corresponds to the positioning block (406), and the size of the positioning hole (201) matches the positioning block (406). The positioning block (406) is inserted into the inner wall of the positioning hole (201). The front and rear surfaces of the adjusting block (405) are fixedly connected with support base blocks (407).

4. A gantry fixture according to claim 3, characterized in that: The transmission mechanism (6) includes a transmission box (601) fixed to the back of the workbench (1). A drive motor (602) is fixedly connected to the inner wall of the transmission box (601). A drive gear (603) is fixedly connected to the rotating shaft of the drive motor (602). The rear ends of the two threaded rods (401) extend into the interior of the transmission box (601). A worm wheel (604) is fixedly connected to the surface of the threaded rod (401). A transmission shaft (605) is rotatably connected between the left and right inner walls of the transmission box (601). Two worms (606) are fixedly connected to the surface of the transmission shaft (605). The position of the worm wheel (604) corresponds to that of the worm (606), and the worm (606) meshes with its corresponding worm wheel (604).

5. A gantry fixture according to claim 4, characterized in that: A driven gear (607) is fixedly connected to the surface of the transmission shaft (605). The position of the driven gear (607) corresponds to that of the drive gear (603). The drive gear (603) meshes with the driven gear (607). A first synchronous pulley (608) is fixedly connected to the surface of the transmission shaft (605). A fixed frame (102) is fixedly connected to the upper surface of the worktable (1). A linkage shaft (609) is rotatably connected to the inner surface of the fixed frame (102). A second synchronous pulley (610) is fixedly connected to the surface of the linkage shaft (609). The second synchronous pulley (610) is located directly above the first synchronous pulley (608). A transmission belt (611) is installed between the first synchronous pulley (608) and the second synchronous pulley (610).

6. A gantry fixture according to claim 5, characterized in that: The chip removal mechanism (5) includes an exhaust pipe (501) fixedly connected to the upper surface of the fixed frame (102). A piston disc (502) is slidably provided on the inner wall of the exhaust pipe (501). A movable push rod (503) is fixedly connected at the center of the lower surface of the piston disc (502). The bottom end of the movable push rod (503) extends to the outside of the exhaust pipe (501), and a linkage frame (504) is rotatably connected to the bottom end of the movable push rod (503). A linkage disc (612) is fixedly connected to the end of the linkage shaft (609). The bottom end of the linkage frame (504) is rotatably connected to the surface of the linkage disc (612) through a rotating shaft.

7. A gantry fixture according to claim 6, characterized in that: An air inlet pipe (507) is fixedly embedded on the back of the exhaust pipe (501), and an exhaust connecting pipe (508) is fixedly embedded on the upper surface of the exhaust pipe (501). An exhaust hose (509) is fixedly connected to the end of the exhaust connecting pipe (508). The chip removal mechanism (5) also includes several chip removal air holes (505) opened on the inner wall of the relief groove (302), and an air supply connecting pipe (506) fixedly embedded at the bottom of the tool body (3). The end of the exhaust hose (509) away from the exhaust connecting pipe (508) is threadedly connected to the air inlet end of the air supply connecting pipe (506).

8. A gantry fixture according to claim 7, characterized in that: Several chip removal vents (505) are evenly distributed in an inclined manner on the inner wall of the relief groove (302), and several chip removal vents (505) are symmetrically distributed on the left and right inner walls of the relief groove (302).

9. A gantry fixture according to claim 3, characterized in that: A guide rod (408) is fixedly connected to the side of the support base block (407). A guide through hole matching the guide rod (408) is opened on the surface of the mounting plate (403). The guide rod (408) is slidably connected to the surface of the mounting plate (403) through the guide through hole. An adjusting nut is fixed to the end of the adjusting screw (404).

10. A gantry fixture according to claim 7, characterized in that: The intake end of the intake pipe (507) is fixed with a one-way intake valve, and the surface of the exhaust connection pipe (508) is fixedly connected with a one-way exhaust valve.

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