Quick-change fixture for machining of numerically controlled machine tools

Abstract

The utility model relates to lathe fixture technical field, and disclose a quick -change type clamp for numerical control machine tool processing, including flat -nose pliers, flat -nose pliers top surface is set up slide rail, the recess is set up in the bottom surface center area of slide rail inboard, the utility model discloses by holding the cover plate and lifting it upward, the cover plate is away from the screw rod covered by the bottom under the sliding connection of telescopic link, screw rod moves behind the drive clamping plate and drives the drive clamping plate to move behind, the clamping formed by drive clamping plate and passive clamping plate is unfastened, the metal block loses the clamping and adjusts the face to be milled, only needs to hold the handle and pulls the screw rod forward after adjusting, and then the slider connected with the screw rod moves forward, thereby drive screw rod moves forward together, finally completes the reset of drive clamping plate, finally presses down the cover plate and makes its both sides telescopic link contract, and then the cover plate covers in screw rod top surface, reaches the beneficial effect of the metal block of clamping fast replacement.

Description

Technical Field

[0001] This utility model relates to the field of machine tool fixture technology, specifically a quick-change fixture for CNC machine tool processing. Background Technology

[0002] Flat-jaw pliers have a simple structure and do not incorporate any electric or pneumatic equipment, making them highly cost-effective. The flat-jaw clamping block structure can also clamp rectangular metal pieces of various sizes. As disclosed in paragraph 0026 of the prior art CN222493829U specification: "...place the part between the movable clamping plate and the fixed clamping plate. After placement, the operator can pull the locking rod via the pull ring, causing the locking rod to move outwards from the limit gear, disengaging from the limit gear. At this time, the operator can rotate the threaded rod via the handwheel. As the threaded rod rotates, the drive screw pushes the movable clamping plate to one side of the fixed clamping plate, clamping the part. During the movement of the movable clamping plate, the telescopic dust cover extends and retracts, ensuring that the telescopic dust cover always shields the threaded rod on the right side of the side plate, preventing debris from falling onto the threaded rod during subsequent processing and ensuring the threaded rod's performance..."

[0003] Most of the aforementioned existing technologies improve the clamping structure. For example, the aforementioned technologies use a dustproof structure to shield the threaded rod to prevent chip accumulation. However, in actual use, the flat-jaw vise, as a clamping tool, relies on purely manual clamping and is driven by a lead screw and nut. As we all know, the distance the nut advances is one pitch increment on its surface after the lead screw rotates one revolution. The most strenuous part of the entire clamping tool, rotating for clamping and reversing for unloading, goes unnoticed. When clamping a metal block, the lead screw needs to be rotated continuously to form a clamp between the two clamping plates. When milling a metal block, it is multi-faceted milling. During this process, it is necessary to change the face of the metal block or replace the next metal block after milling. This requires continuous rotation of the lead screw, which is very strenuous. Utility Model Content

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a quick-change fixture for CNC machine tool processing, which has the advantages of rapid replacement of the clamped metal block and solves the aforementioned technical problems.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a quick-change fixture for CNC machine tool processing, including a flat-jaw vise, a slide rail on the top surface of the vise, an active clamping plate slidably connected to the rear end of the inner side of the slide rail, a passive clamping plate fixedly connected to the front end of the inner side of the slide rail, a groove in the center area of ​​the bottom surface of the inner side of the slide rail, a lead screw rotatably connected to the inner side of the groove, a nut threadedly connected to the middle end of the lead screw to the inner side of the sliding groove, an active clamping plate fixedly connected to the top surface of the nut, and a quick-change structure connected to the front end of the lead screw and the nut for controlling the forward and backward movement of the lead screw and the nut is provided at the front end of the inner side of the groove and below the passive clamping plate.

[0006] Preferably, the quick-change structure includes a slider slidably connected to the front end of the inner side of the groove and whose rear wall is rotatably connected to the front end of the lead screw. A spring is fixedly connected to the front wall of the slider. The tail end of the spring is fixedly connected to the rear wall of a through block installed at the front entrance of the inner side of the groove. The through block is a block with a hole in the center. A lead screw passes through the hole. The rear end of the lead screw passes through the through block and is fixedly connected to the front wall of the slider. The front end of the lead screw is located in front of the flat-nose pliers and is covered with a cover plate that matches its own thread on the top surface near the groove. The cover plate is located at the opening at the front end of the groove. Two telescopic rods are connected to both sides of the cover plate. The bottom of the telescopic rods is connected to the top surface of a fixed block installed at the front end of the groove and located on both sides of the front wall of the flat-nose pliers.

[0007] Preferably, a grip is fixedly connected to the front end of the screw to increase the contact area with the palm.

[0008] Preferably, the front wall of the slider also contacts a push rod, the number of push rods is at least two, and the front end is fixedly connected to the rear wall of the through block.

[0009] Preferably, the two sides of the through block are fixedly connected to the inside of the groove by bolts.

[0010] Preferably, the quick-change structure further includes a stop block fixedly connected to the opening at the front end of the groove. The middle end of the stop block is penetrated by a lead screw. After the front end of the lead screw passes through the stop block, it does not move relative to it. The front wall of the lead screw is connected to a moving block. The bottom of the moving block is slidably connected to a track fixedly installed at the bottom of the front wall of the flat-jaw pliers. At least two slots are opened on the top surface of the track. A piston rod is slidably connected to the inside of the slots. The top of the piston rod is connected to the front wall of the moving block. The outer sleeve of the piston rod is fixedly connected to the front wall of the moving block. Its inner rod is slidably connected to the outer sleeve and inserted downward into the slot.

[0011] Compared with the prior art, this utility model provides a quick-change fixture for CNC machine tool processing, which has the following advantages: 1. This utility model involves lifting the cover plate upwards by gripping it. The cover plate, under the sliding connection of the telescopic rod, separates from the screw rod covering the bottom. Since the threads of the cover plate and the screw rod are matched, they are in a self-locking state when engaged. After unlocking, the screw rod is pushed towards the lead screw, causing it to move backwards. This moves the fixed slider backwards as well. As the slider moves backwards, the lead screw, rotatably connected to its rear wall, also moves backwards. When the lead screw moves backwards, the nut is also moved backwards, and correspondingly, the active clamping plate connected to its top surface also moves backwards. At this point, the active clamping plate and the passive clamping plate form a... Once the clamping is released and the metal block is no longer clamped, adjust the surface to be milled. After adjustment, simply hold the handle and pull the screw forward, causing the slider connected to the screw to move forward, which in turn moves the lead screw forward as well. Finally, reset the active clamping plate. Press down on the cover plate to retract the telescopic rods on both sides, and then the cover plate covers the top surface of the screw. Once the screw is covered by the cover plate, it will be locked and cannot move. At this point, simply rotate the lead screw a few turns again to make the nut drive the active clamping plate to tightly clamp the metal block. This achieves the beneficial effect of quickly replacing the clamped metal block. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present utility model; Figure 2 This is an exploded view of the overall structure of Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model; Figure 4 This is an exploded view of the overall structure of Embodiment 2 of this utility model; Figure 5 This is a schematic diagram of the screw structure in Embodiment 1 of this utility model.

[0013] The components are: 1. Flat-jaw pliers; 101. Slide rail; 102. Active clamping plate; 103. Passive clamping plate; 2. Groove; 201. Lead screw; 202. Nut; 3. Slider; 4. Spring; 401. Through block; 402. Top rod; 5. Screw; 501. Handle; 6. Cover plate; 601. Telescopic rod; 602. Fixing block; 7. Stop block; 8. Moving block; 9. Track; 901. Bayonet; 10. Piston rod. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-5 A quick-change fixture for CNC machine tool processing includes a flat-jaw vise 1. A slide rail 101 is provided on the top surface of the flat-jaw vise 1. An active clamping plate 102 is slidably connected to the rear end of the inner side of the slide rail 101. A passive clamping plate 103 is fixedly connected to the front end of the inner side of the slide rail 101. A groove 2 is provided in the center area of ​​the bottom surface of the inner side of the slide rail 101. A lead screw 201 is rotatably connected to the inner side of the groove 2. A nut 202 is threadedly connected to the middle end of the lead screw 201 inside the sliding groove 2. The active clamping plate 102 is fixedly connected to the top surface of the nut 202. A quick-change structure for controlling the forward and backward movement of the lead screw 201 and the nut 202 is provided at the front end of the inner side of the groove 2 and below the passive clamping plate 103.

[0016] Furthermore, the tail end of the lead screw 201 is also connected to a crank handle. The crank handle is not shown in the accompanying drawings of this application specification. Its structure is the same as that of the crank handle of the existing flat-jaw pliers 1, so it will not be described in detail.

[0017] Example 1 The metal block to be clamped is placed above the slide rail 101. Then, the crank at the end of the lead screw 201 is turned to make the lead screw 201 start to rotate. The front end of the lead screw 201 rotates relative to the slider 3, but does not affect the slider 3. Then, the thread on the surface of the lead screw 201 moves relative to the nut 202. Under the limit of the groove 2, the nut 202 converts the circular motion into linear motion and begins to move forward inside the groove 2. At the same time, it drives the active clamping plate 102 connected to its top surface to contact the passive clamping plate 103. At this time, the metal block is clamped between the two. Then, the clamped metal block is milled by a machine tool to fix it. After the current surface of the metal block is milled, the milled surface can be replaced. To expedite the replacement of the milled surface, in this embodiment, the cover plate 6 is lifted upwards by gripping it. Under the sliding connection of the telescopic rod 601, the cover plate 6 moves away from the screw 5 covering the bottom. Since the bottom surface of the cover plate 6 and the thread of the screw 5 are engaged, they are in a self-locking state when connected. After unlocking, the screw 5 is pushed towards the lead screw 201. The screw 5 moves backward, causing the fixed slider 3 to move backward as well. As the slider 3 moves backward, the lead screw 201, which is rotatably connected to its rear wall, also moves backward. The nut 202 and the lead screw 201 are threadedly connected and inherently self-locking. Functionally, when the lead screw 201 moves backward, the nut 202 is also driven to move backward, and correspondingly, the active clamping plate 102 connected to its top surface also moves backward. At this time, the clamping formed by the active clamping plate 102 and the passive clamping plate 103 is released. After the metal block loses its clamping, it can be adjusted by hoisting equipment or workers to mill the surface. After the adjustment is completed, simply hold the handle 501 and pull the screw 5 forward, and then the slider 3 connected to the screw 5 moves forward, thereby driving the lead screw 201 to move forward as well. Finally, the active clamping plate 102 is reset. Finally, press down on the cover plate 6 to retract the telescopic rods 601 on both sides, and then the cover plate 6 covers the top surface of the screw 5. Since the screw 5 is straight... The screw 5 moves linearly, while the cover plate 6 moves vertically. Since there is no connection between the two, once the screw 5 is covered by the cover plate 6, it will be locked and cannot move. Correspondingly, in actual use, the active clamping plate 102 must tightly clamp the passive clamping plate 103 to achieve the clamping of the metal block. Therefore, using only the forward screw 5 will not achieve tight clamping. At this time, it is only necessary to rotate the screw 201 a few turns again to make the nut 202 drive the active clamping plate 102 to tightly clamp the metal block. Compared with the prior art, which requires the screw 201 to rotate back and forth for many turns, this application reduces the time of rotating the screw 201 and speeds up the time of replacing the metal block.

[0018] Furthermore, the spring 4 provides restraint when the screw 5 moves backward. Since the slider and the through block 401 are fixedly connected at both ends of the spring, they are pulled apart by the spring when they are relatively far apart, so as to avoid the screw 5 moving backward too much. Pulling the screw 5 forward is mainly to reset the slider 3. At the same time, the equipped push rod 402 can limit the slider 3 to its initial position after it is reset. Once the user finds that the screw 5 can no longer be moved, it can be proven that the slider 3 has been reset or the metal block held by the active clamping plate 102 has blocked it and can no longer move. In the second case, simply rotate the screw 201 a few turns so that the nut 202 drives the active clamping plate 102 to tightly clamp the metal block.

[0019] In use, to expedite the replacement of the milled surface of the metal block, the cover plate 6 is lifted upwards by gripping it. Under the sliding connection of the telescopic rod 601, the cover plate 6 moves away from the screw 5 covering the bottom. Since the threads of the cover plate 6 and the screw 5 are engaged, they are in a self-locking state when connected. After unlocking, the screw 5 is pushed towards the lead screw 201. The screw 5 moves backward, causing the fixed slider 3 to move backward as well. As the slider 3 moves backward, the lead screw 201, rotatably connected to its rear wall, also moves backward. The nut 202 and the lead screw 201 are threadedly connected and inherently have a self-locking function. When the lead screw 201 moves backward, the nut 202 is also moved backward, correspondingly causing the active clamping plate 102 connected to its top surface to move backward as well. At this time, the active clamping plate 102 and the passive clamping plate... The clamping formed by the clamping plate 103 is released. After the metal block loses its clamping, the surface to be milled can be adjusted by the hoisting equipment or by the worker. After the adjustment is completed, simply hold the handle 501 and pull the screw 5 forward. Then the slider 3 connected to the screw 5 moves forward, thereby driving the lead screw 201 to move forward as well. Finally, the active clamping plate 102 is reset. Finally, press down on the cover plate 6 so that the telescopic rods 601 on both sides retract and the cover plate 6 covers the top surface of the screw 5. Since the screw 5 moves linearly and the cover plate 6 moves up and down, there is no connection between the two. Therefore, once the screw 5 is covered by the cover plate 6, it will be locked and cannot move. Correspondingly, in actual use, the active clamping plate 102 will necessarily tightly clamp the passive clamping plate 103 to achieve the clamping of the metal block.

[0020] Example 2 Please refer to the instruction manual appendix. Figure 4-5In Embodiment 1, the active clamping plate 102 quickly replaces the clamped metal block in the clamping state through the cooperation of structures such as the cover plate 6, screw 5, and slider. However, the excessive number of structures makes repairs cumbersome if damaged. Therefore, this embodiment simplifies the structure of Embodiment 1 to achieve faster replacement of the clamped metal block with fewer structures. By making the lead screw longer, extending directly to the outside of the groove 2, and then clamping the metal block as in Embodiment 1, when it is necessary to change the milled surface, the piston rod 10 is raised so that its inner rod part leaves the bayonet 901. At this time, the entire lead screw 201 is unrestricted. Then, the tail end of the lead screw 201 is grasped and pulled backward. Pushing the active clamping plate 102 away from the metal block, after the metal block has been replaced with a milled surface, holding the front end of the lead screw 201 and moving it forward will drive the active clamping plate 102 closer to the passive clamping plate 103. Furthermore, the bayonet 901 is designed with multiple bayonets to prevent the metal block from becoming too large to reset after the milled surface has been replaced. Simply pull the lead screw 201 forward until it can no longer move, then lower the piston rod 10 and insert it into the bayonet 901 to lock the lead screw 201. Then, to reinforce the metal block, simply rotate the lead screw 201 a few turns again so that the nut 202 drives the active clamping plate 102 to tightly clamp the metal block.

[0021] In use: After clamping the metal block as in Example 1, when it is necessary to change the milled surface, lift the piston rod 10 so that its inner rod part leaves the bayonet 901. At this time, the entire lead screw 201 is unrestricted. Then, hold the tail end of the lead screw 201 and push it backward. The corresponding active clamping plate 102 moves away from the metal block. After changing the milled surface of the metal block, hold the front end of the lead screw 201 and move it forward to drive the active clamping plate 102 closer to the passive clamping plate 103.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick-change fixture for CNC machine tool processing, comprising a flat-jaw vise (1), wherein a slide rail (101) is provided on the top surface of the flat-jaw vise (1), an active clamping plate (102) is slidably connected to the rear end of the inner side of the slide rail (101), a passive clamping plate (103) is fixedly connected to the front end of the inner side of the slide rail (101), a groove (2) is provided in the center area of ​​the bottom surface of the inner side of the slide rail (101), a lead screw (201) is rotatably connected to the inner side of the groove (2), a nut (202) is threadedly connected to the middle end of the lead screw (201) to the inner side of the sliding groove (2), and the active clamping plate (102) is fixedly connected to the top surface of the nut (202), characterized in that: The inner front end of the groove (2) and below the passive clamping plate (103) is provided with a quick-change structure connected to the front end of the lead screw (201) for controlling the forward and backward movement of the lead screw (201) and the nut (202).

2. The quick-change fixture for CNC machine tool processing according to claim 1, characterized in that: The quick-change structure includes a slider (3) slidably connected to the front end of the inner side of the groove (2) and rotatably connected to the front end of the screw (201) on its rear wall. A spring (4) is fixedly connected to the front wall of the slider (3). The tail end of the spring (4) is fixedly connected to the rear wall of the through block (401) installed at the front end entrance of the inner side of the groove (2). The through block (401) is a block with a hole in the center. A screw (5) passes through the hole. The rear end of the screw (5) passes through the through block (401) and is fixedly connected to the front wall of the slider (3). The front end of the screw (5) is located in front of the flat-nose pliers (1) and is covered with a cover plate (6) that matches its own thread on the top surface near the groove (2). The cover plate (6) is located at the opening at the front end of the groove (2). Two telescopic rods (601) are connected to both sides of the cover plate (6). The bottom of the telescopic rod (601) is fixedly connected to the top surface of the fixing block (602) installed at the front end of the groove (2) and located on both sides of the front wall of the flat-nose pliers (1).

3. A quick-change fixture for CNC machine tool processing according to claim 2, characterized in that: The screw (5) has a handle (501) fixedly connected to its front end to increase the contact area with the palm.

4. A quick-change fixture for CNC machine tool processing according to claim 3, characterized in that: The front wall of the slider (3) is also in contact with a push rod (402), the number of push rods (402) is at least two, and the front end is fixedly connected to the rear wall of the through block (401).

5. A quick-change fixture for CNC machine tool processing according to claim 4, characterized in that: The two sides of the through block (401) are fixedly connected to the inside of the groove (2) by bolts.

6. A quick-change fixture for CNC machine tool processing according to claim 1, characterized in that: The quick-change structure also includes a stop block (7) fixedly connected to the opening at the front end of the groove (2). The middle end of the stop block (7) is penetrated by a lead screw (201). After the front end of the lead screw (201) passes through the stop block (7), it does not move relative to it. The front wall of the lead screw (201) is connected to a moving block (8). The bottom of the moving block (8) is slidably connected to a track (9) fixedly installed at the bottom of the front wall of the flat-nose pliers (1). The top surface of the track (9) has at least two slots (901). The inner side of the slots (901) is slidably connected to a piston rod (10). The top of the piston rod (10) is connected to the front wall of the moving block (8). The outer sleeve of the piston rod (10) is fixedly connected to the front wall of the moving block (8). Its inner rod is slidably connected to the outer sleeve and inserted downward into the slot (901).

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