CNC multi-station machining four-axis clamp

Abstract

The utility model relates to the field of four-axis clamps, and discloses a CNC multi-station machining four-axis clamp which comprises a fixed seat, a plurality of sets of through threaded holes are formed in the inner surface of the fixed seat, a movable seat is slidably connected to the upper end of the fixed seat, and a clamping device is slidably connected to the interior of the movable seat. A buffer device is arranged at the upper end of the fixing seat, the clamping device comprises a clamping jaw, a trigger block is slidably connected to the outer side of the clamping jaw, and a linkage block is slidably connected to the lower end of the inner surface of the clamping jaw. According to the four-axis clamp, through the arrangement of the clamping jaws, the linkage blocks, the trigger blocks, the clamping blocks, the clamping grooves and the sliding blocks, when a certain clamping jaw is damaged due to long-time stress, the whole four-axis clamp does not need to be disassembled complexly, and the single damaged clamping jaw can be rapidly replaced only by pressing the trigger blocks. According to the design, the replacement process of the clamping jaw is greatly simplified, the maintenance efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of four-axis fixtures, in particular to a CNC multi-station processing four-axis fixture. Background Art

[0002] A four-axis fixture generally refers to a device or tool used to clamp workpieces, particularly during machining, assembly, or testing. It typically consists of four grippers, each located at a corner of the fixture, controlled by a robotic arm, pneumatic, or hydraulic system. The design of a four-axis fixture enables it to stably grip and position workpieces in three dimensions, ensuring precise and stable positioning during machining or testing, ultimately achieving high-quality processing and production efficiency.

[0003] In existing CNC multi-station processing, it is often necessary to use multiple sets of four-axis fixtures to batch process workpieces.

[0004] However, in actual use, there are still certain dimensional differences between workpieces produced and processed in the same batch. Therefore, when the same motion instructions are issued to multiple groups of four-axis fixtures through PLC, the forces exerted on the end clamps of different four-axis fixtures are still different. As a result, some clamps with larger forces are at greater risk of damage after long-term use. When the clamps are damaged, the existing clamps often need to be disassembled from the four-axis fixture and repeatedly twisted with tools such as wrenches or screwdrivers to disassemble them, making the overall disassembly process more cumbersome. Therefore, a CNC multi-station processing four-axis fixture is proposed to solve the above problems. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a CNC multi-station machining four-axis clamp, which aims to improve the problem in the prior art that the disassembly and replacement process of independently damaged clamps is relatively cumbersome and time-consuming.

[0006] In order to achieve the above-mentioned object, the utility model adopts the following technical solution: a CNC multi-station machining four-axis fixture, comprising a fixed seat, the inner surface of which is provided with a plurality of groups of threaded holes, the upper end of which is slidably connected to a movable seat, the interior of which is slidably connected to a clamping device, and the upper end of which is provided with a buffer device;

[0007] The clamping device includes a clamping jaw, a trigger block is slidably connected to the outer side of the clamping jaw, a linkage block is slidably connected to the lower end of the inner surface of the clamping jaw, a card block is fixedly connected to the lower part of the linkage block, a card slot is inserted into the outer surface of the card block, and a slider is slidably connected to the inner side of the movable seat.

[0008] As a further description of the above technical solution:

[0009] The buffer device includes a piston rod, the outer arc surface of the piston rod is connected to a damping chamber, the lower end of the piston rod is fixedly connected to a piston block, and the outer arc surface of the piston block is fixedly connected to a sealing ring.

[0010] As a further description of the above technical solution:

[0011] The diameter of the fixed seat is larger than that of the movable seat. The inner surface of the movable seat is provided with a plurality of rectangular sliding grooves. The lower end of the movable seat is slidably connected to the fixed seat via a protrusion.

[0012] As a further description of the above technical solution:

[0013] A rectangular slide groove is provided at the lower end of the inner surface of the clamping jaw, a cylindrical slide groove is provided at the lower part of the inner surface of the clamping jaw, a truncated cone-shaped groove is provided on the inner surface of the trigger block, the linkage block is arranged as a whole in an L-shape, the outer surface of the linkage block contacts the trigger block, the clamping block is arranged as a whole in a triangular prism shape, two groups of linkage blocks are provided in each group of clamping jaws, and the two groups of linkage blocks are elastically connected by a spring.

[0014] As a further description of the above technical solution:

[0015] The clamping blocks are provided in two groups and are respectively located at the lower parts of the two groups of linkage blocks. The two groups of clamping blocks face in opposite directions, and a clamping groove is provided on the inner surface of the sliding block.

[0016] As a further description of the above technical solution:

[0017] The inner surface of the fixed seat is fixedly connected with a damping chamber, and the inner surface of the movable seat is fixedly connected with a piston rod.

[0018] As a further description of the above technical solution:

[0019] The lower end of the movable seat is elastically connected to the damping chamber through a spring, and the upper end of the damping chamber is provided with a through hole.

[0020] As a further description of the above technical solution:

[0021] The inner surface of the piston block is provided with a plurality of through holes, and the outer arc surface of the piston block is provided with an annular groove.

[0022] The utility model has the following beneficial effects:

[0023] 1. In this utility model, the clamping jaws, linkage block, trigger block, clamping block, clamping slot, and slider are configured so that when a clamping jaw is damaged due to prolonged stress, the damaged clamping jaw can be quickly replaced by simply pressing the trigger block, without the need for complex disassembly of the entire four-axis fixture. This design greatly simplifies the clamping jaw replacement process, improves maintenance efficiency, and reduces production costs.

[0024] 2. In the present invention, by providing the piston rod, damping chamber, piston block and sealing ring, when the internal parameters of the CNC equipment are abnormal, the movable seat as a whole and the clamping claws therein can be buffered by means of spring buffering and motion damping, thereby preventing the clamping claws from easily undergoing plastic deformation and damage during the impact process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is an overall schematic diagram of a CNC multi-station machining four-axis fixture proposed by the utility model;

[0026] Figure 2 This is a schematic diagram of the cross section of the clamping jaws of a CNC multi-station machining four-axis fixture proposed by the present invention;

[0027] Figure 3 This is a schematic diagram of the cross section of a slider of a CNC multi-station four-axis fixture proposed by the present invention;

[0028] Figure 4 This is a schematic diagram of a buffer device for a CNC multi-station machining four-axis fixture proposed by the present invention;

[0029] Figure 5 This is a schematic diagram of the cross section of the damping chamber of a CNC multi-station machining four-axis fixture proposed in the present invention.

[0030] Legend:

[0031] 1. Movable seat; 2. Clamping device; 3. Buffer device; 4. Fixed seat; 5. Threaded hole; 201. Clamping claw; 202. Linkage block; 203. Trigger block; 204. Clamping block; 205. Clamping slot; 206. Slider; 301. Piston rod; 302. Damping chamber; 303. Piston block; 304. Sealing ring. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] Reference Figure 1 - Figure 3 The utility model provides an embodiment of a CNC multi-station machining four-axis fixture, comprising a fixed seat 4, the inner surface of which is provided with a plurality of threaded holes 5, the upper end of the fixed seat 4 being slidably connected to a movable seat 1, the interior of the movable seat 1 being slidably connected to a clamping device 2, and the upper end of the fixed seat 4 being provided with a buffer device 3;

[0034] The clamping device 2 includes a clamping jaw 201, the outer side of the clamping jaw 201 is slidably connected to a trigger block 203, the lower end of the inner surface of the clamping jaw 201 is slidably connected to a linkage block 202, the lower part of the linkage block 202 is fixedly connected to a card block 204, the outer surface of the card block 204 is plugged with a card slot 205, and the inner side of the movable seat 1 is slidably connected to a slider 206.

[0035] The diameter of the fixed seat 4 is larger than that of the movable seat 1, so when the device is installed, its position can be fixed by the threaded hole 5 inside the fixed seat 4, and the inner surface of the movable seat 1 is provided with multiple sets of rectangular sliding grooves, so that the clamping claw 201 can be accommodated to move inside it and limit its movement trajectory. The lower end of the movable seat 1 is slidably connected to the fixed seat 4 through a protrusion, and the component at the protrusion can be a telescopic rod component in the prior art, so as to realize the sliding connection between the movable seat 1 and the fixed seat 4, and the lower end of the inner surface of the clamping claw 201 is provided with a rectangular sliding groove, so that the linkage block 202 can be accommodated to slide inside it, and the lower part of the inner surface of the clamping claw 201 is provided with a cylindrical sliding groove, so that the trigger block 203 can be accommodated to slide inside it, and the inner surface of the trigger block 203 is provided with a truncated cone-shaped groove, so that the trigger block 203 When pressed, the two groups of linkage blocks 202 on both sides can be squeezed simultaneously by their internal inclined surfaces to make them move toward each other. The linkage block 202 is set in an L shape as a whole. The outer surface of the linkage block 202 contacts the trigger block 203. The card block 204 is set in a triangular prism shape as a whole, so it can be inserted into the card slot 205 that matches its shape. There are two groups of linkage blocks 202 in each group of clamping jaws 201, and the two groups of linkage blocks 202 are elastically connected by a spring. Therefore, when people release the trigger block 203, the spring can reset the linkage blocks 202 on both sides by its own elastic force. There are two groups of card blocks 204, which are respectively located at the lower part of the two groups of linkage blocks 202. The two groups of card blocks 204 face opposite directions, so they can be inserted into the card slot 205 that matches its shape. The inner surface of the slider 206 is provided with a card slot 205.

[0036] Reference Figure 1 、 Figure 4 as well as Figure 5The buffer device 3 includes a piston rod 301, the outer arc surface piston of the piston rod 301 is connected to the damping chamber 302, the lower end of the piston rod 301 is fixedly connected to the piston block 303, and the outer arc surface of the piston block 303 is fixedly connected to the sealing ring 304.

[0037] The inner surface of the fixed seat 4 is fixedly connected to a damping chamber 302, and the damping chamber 302 is filled with damping fluid. Therefore, the movement damping of the piston block 303, the piston rod 301 and the movable seat 1 can be formed by the extrusion force between the damping fluid and the piston block 303. The inner surface of the movable seat 1 is fixedly connected to the piston rod 301. The lower end of the movable seat 1 is elastically connected to the damping chamber 302 by a spring. The upper end of the damping chamber 302 is provided with a through hole, so that the piston rod 301 can slide therein. The inner surface of the piston block 303 is provided with multiple groups of through holes. Therefore, when the damping fluid is squeezed inside the damping chamber 302, the damping fluid will not completely block the movement of the piston block 303, but will only hinder its movement. The outer arc surface of the piston block 303 is provided with an annular groove, so that the sealing ring 304 can be located on its outer arc surface, so that the whole formed by the piston block 303 and the sealing ring 304 can form a piston connection with the damping chamber 302.

[0038] Working principle: When any independent clamping jaw 201 in this device is damaged, the trigger block 203 on the outside of the group of clamping jaws 201 can be pressed. At this time, the trigger block 203 will contact the two groups of linkage blocks 202 inside the clamping jaw 201 through its inner conical arc surface. At this time, the two groups of linkage blocks 202 will overcome the elastic force of the spring and move closer to each other. At this time, the two groups of clamping blocks 204 will also move closer to each other. At this time, the clamping jaw 201 can be directly lifted upward as a whole, thereby completing the disassembly of the damaged clamping jaw 201. When replacing, the new clamping jaw 201 can be directly aligned with the slot 205 above the slider 206 and inserted. At this time, the clamping blocks 204 on both sides will move closer to each other due to their inclined surfaces being squeezed until they fully enter the inside of the slot 205. Due to the spring elastic force between the two groups of linkage blocks 202, they move away from each other. At this time, due to the clamping connection between the clamping block 204 and the slot 205, the replacement of the new clamping jaw 201 is completed.

[0039] At the same time, when the clamping jaw 201 touches the workpiece due to abnormal operation or abnormal data during its movement, the movable seat 1 as a whole will be impacted and move toward the fixed seat 4. At this time, the piston rod 301 will be driven by the movable seat 1 to move toward the inside of the damping chamber 302, and the piston block 303 will also be driven to squeeze the damping fluid stored in the damping chamber 302. At the same time, during the movement of the piston rod 301, the spring will also buffer the impact force through its own elastic force, thereby buffering the impact force on the clamping jaw 201 through buffering and motion damping.

[0040] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A CNC multi-station machining four-axis fixture, comprising a fixed seat (4), characterized in that: The inner surface of the fixed seat (4) is provided with a plurality of threaded holes (5) therethrough, the upper end of the fixed seat (4) is slidably connected to a movable seat (1), the interior of the movable seat (1) is slidably connected to a clamping device (2), and the upper end of the fixed seat (4) is provided with a buffer device (3); The clamping device (2) comprises a clamping jaw (201), the outer side of the clamping jaw (201) is slidably connected to a trigger block (203), the lower end of the inner surface of the clamping jaw (201) is slidably connected to a linkage block (202), the lower part of the linkage block (202) is fixedly connected to a clamping block (204), the outer surface of the clamping block (204) is plugged with a clamping slot (205), and the inner side of the movable seat (1) is slidably connected to a slider (206).

2. The CNC multi-station machining four-axis fixture according to claim 1, characterized in that: The buffer device (3) comprises a piston rod (301), the outer arc surface of the piston rod (301) is connected to a damping chamber (302), the lower end of the piston rod (301) is fixedly connected to a piston block (303), and the outer arc surface of the piston block (303) is fixedly connected to a sealing ring (304).

3. The CNC multi-station machining four-axis fixture according to claim 1, characterized in that: The diameter of the fixed seat (4) is larger than the diameter of the movable seat (1); the inner surface of the movable seat (1) is provided with a plurality of rectangular sliding grooves; the lower end of the movable seat (1) is slidably connected to the fixed seat (4) via a protrusion.

4. The CNC multi-station machining four-axis fixture according to claim 1, characterized in that: A rectangular slide groove is provided at the lower end of the inner surface of the clamping jaw (201), a cylindrical slide groove is provided at the lower portion of the inner surface of the clamping jaw (201), a truncated cone-shaped groove is provided on the inner surface of the trigger block (203), the linkage block (202) is configured as an L-shape as a whole, the outer surface of the linkage block (202) contacts the trigger block (203), the clamping block (204) is configured as a triangular prism as a whole, two groups of linkage blocks (202) are provided in each group of clamping jaws (201), and the two groups of linkage blocks (202) are elastically connected by a spring.

5. The CNC multi-station machining four-axis fixture according to claim 1, characterized in that: Two groups of the clamping blocks (204) are provided and are respectively located at the lower parts of the two groups of linkage blocks (202). The two groups of the clamping blocks (204) face in opposite directions. A clamping groove (205) is provided on the inner surface of the slider (206).

6. The CNC multi-station machining four-axis fixture according to claim 2, characterized in that: The inner surface of the fixed seat (4) is fixedly connected to a damping chamber (302), and the inner surface of the movable seat (1) is fixedly connected to a piston rod (301).

7. The CNC multi-station machining four-axis fixture according to claim 2, characterized in that: The lower end of the movable seat (1) is elastically connected to the damping chamber (302) via a spring, and the upper end of the damping chamber (302) is provided with a through hole.

8. The CNC multi-station machining four-axis fixture according to claim 2, characterized in that: The inner surface of the piston block (303) is provided with a plurality of through holes, and the outer arc surface of the piston block (303) is provided with an annular groove.

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