An automatic machining clamping device suitable for multi-size workpieces

Abstract

The utility model discloses an automatic processing clamping device of adaptation to multiple size workpieces, including base, two groups of clamping mechanism of symmetrical setting on base, drive mechanism and adjusting mechanism for adjusting the initial interval of clamping mechanism that drive clamping mechanism relative close or far apart, still be equipped with horizontal guide rail on the base, two groups clamping mechanism are slidably connected in the both ends of horizontal guide rail respectively, clamping mechanism includes sliding seat, clamping jaw subassembly and be equipped with the elastic buffer pad in the one side of sliding seat. Can take into account multiple size adaptability, high accuracy positioning, stable clamping and the novel clamping device of automation control, to solve the technical problems such as the adjustment of existing technology complicated, poor universality, clamping reliability is low, satisfy modern automation processing to the demand of high efficiency, precision, stability.

Description

Technical Field

[0001] This utility model relates to the field of clamping device technology, specifically an automated processing clamping device adapted to workpieces of various sizes. Background Technology

[0002] In the field of machining, workpiece clamping devices are key components for ensuring machining accuracy and efficiency. As the manufacturing industry shifts towards multi-variety, small-batch production, the diversity of workpiece dimensions places higher demands on the adaptability of clamping devices. Traditional clamping devices generally suffer from the following shortcomings:

[0003] The clamping size adjustment range is limited, and special fixtures need to be changed frequently for different specifications of workpieces, which is time-consuming, labor-intensive and costly; the adjustment method mostly relies on manual coarse adjustment and lacks a fine positioning mechanism, making it difficult to meet the needs of high-precision machining; the clamping stability is insufficient, and the workpiece is easily displaced due to vibration during the machining process, affecting the machining quality; the degree of automation is low, there are many manual intervention links, and it is difficult to match with intelligent machining systems. Utility Model Content

[0004] In order to overcome the shortcomings of existing technical solutions, this utility model provides an automated processing clamping device that can adapt to workpieces of various sizes, which can effectively solve the problems mentioned in the background art.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] An automated processing clamping device for workpieces of various sizes includes a base, two sets of clamping mechanisms symmetrically arranged on the base, a driving mechanism for driving the clamping mechanisms to move closer or further apart, and an adjusting mechanism for adjusting the initial distance between the clamping mechanisms. The base is also provided with a horizontal guide rail, and the two sets of clamping mechanisms are slidably connected to both ends of the horizontal guide rail. Each clamping mechanism includes a sliding seat, a gripper assembly, and an elastic buffer pad provided on one side of the sliding seat.

[0007] The driving mechanism includes a bidirectional lead screw and a drive motor. The bidirectional lead screw is rotatably connected to the base and is arranged along the extension direction of the horizontal guide rail. The two ends of the bidirectional lead screw are respectively threaded to two sets of clamping mechanisms. The output shaft of the drive motor is drivenly connected to the bidirectional lead screw.

[0008] The adjustment mechanism includes an adjustment handwheel and a limiting screw disposed on both sides of the sliding seat. The limiting screw is connected to the gripper assembly, and the adjustment handwheel is fixed to one end of the limiting screw.

[0009] As a further description of the above technical solution, the sliding seat is slidably sleeved on the horizontal guide rail and threadedly connected to the bidirectional lead screw. The gripper assembly includes a main gripper fixed on the sliding seat and a secondary gripper slidably disposed on the main gripper. A fine-tuning structure for adjusting the distance between the main gripper and the secondary gripper is provided.

[0010] As a further description of the above technical solution, the fine-tuning structure includes a dovetail groove formed on the main jaw and a dovetail block disposed on the secondary jaw. The dovetail block is slidably embedded in the dovetail groove. A fine-tuning screw is also threadedly connected to the main jaw, and one end of the fine-tuning screw is rotatably connected to the secondary jaw.

[0011] As a further description of the above technical solution, the main gripper has an arc-shaped clamping surface on its inner side, and anti-slip protrusions are spaced apart on the arc-shaped clamping surface.

[0012] As a further description of the above technical solution, the base is also provided with a limiting scale, which is set along the extension direction of the horizontal guide rail.

[0013] As a further description of the above technical solution, the drive motor and the bidirectional lead screw are connected by a worm gear reducer, the drive motor is a servo motor, and the base is provided with a sensor for detecting the clamping position.

[0014] As a further description of the above technical solution, the base is also provided with a top rod connected to the elastic buffer pad. The elastic buffer pad is made of nitrile rubber and has a hemispherical groove that matches the end of the top rod.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] The present invention provides an automated machining clamping device suitable for workpieces of various sizes, which has at least one of the following beneficial effects during use:

[0017] The adjustment mechanism works in conjunction with the fine-tuning structure. Initial coarse adjustment of the spacing is achieved by adjusting the handwheel and limit screw, while precise fine-tuning is achieved with the help of dovetail grooves, dovetail blocks, and fine-tuning screws. This approach balances the versatility and accuracy of clamping workpieces of various sizes, significantly improving the device's versatility, reducing the frequency of fixture changes, and lowering production costs. The drive mechanism uses a servo motor and worm gear reducer, combined with sensor closed-loop control, to ensure precise movement of the clamping mechanism, providing a guarantee for high-precision machining. The arc-shaped clamping surface and anti-slip ridges increase friction, while the elastic buffer pad (made of nitrile rubber) and the top rod structure absorb vibration and impact, effectively protecting the surface accuracy of the workpiece. The limit scale assists in rapid adjustment, and automated control shortens clamping time. The compact and stable structure meets the needs of efficient and stable automated machining. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an automated processing clamping device for workpieces of various sizes according to the present invention.

[0019] Figure 2 This is a schematic diagram of the first side view of an automated processing clamping device for workpieces of various sizes according to the present invention.

[0020] Figure 3 This is a schematic diagram of the second side structure of an automated processing clamping device for workpieces of various sizes according to the present invention;

[0021] Figure 4 This is a perspective structural diagram of an automated processing clamping device for workpieces of various sizes according to the present invention.

[0022] Numbering on the map:

[0023] 1. Base; 101. Horizontal guide rail; 102. Top rod; 2. Clamping mechanism; 201. Main gripper; 202. Secondary gripper; 203. Sliding seat; 204. Dovetail block; 205. Dovetail groove; 206. Arc-shaped clamping surface; 207. Elastic buffer pad; 3. Drive mechanism; 301. Two-way lead screw; 302. Drive motor; 303. Worm gear reducer; 4. Adjustment mechanism; 401. Limit screw; 402. Adjustment handwheel. Detailed Implementation

[0024] 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.

[0025] like Figure 1-4 As shown, this utility model provides an automated processing clamping device for workpieces of various sizes, including a base 1, two sets of clamping mechanisms 2 symmetrically arranged on the base 1, a driving mechanism 3 for driving the clamping mechanisms 2 to move closer or further apart, and an adjusting mechanism 4 for adjusting the initial distance between the clamping mechanisms 2. The base 1 is also provided with a horizontal guide rail 101, and the two sets of clamping mechanisms 2 are slidably connected to both ends of the horizontal guide rail 101. The clamping mechanism 2 includes a sliding seat 203, a gripper assembly, and an elastic buffer pad 207 provided on one side of the sliding seat 203.

[0026] In this embodiment, before processing workpieces of different sizes, the operator first sets the initial distance between the two sets of clamping mechanisms 2 using the adjustment mechanism 4. The adjusting handwheel 402 is fixed to one end of the limiting screw 401; when the adjusting handwheel 402 is rotated, the limiting screw 401 rotates accordingly. Since the limiting screw 401 is connected to the gripper assembly, its rotation is converted into linear movement of the gripper assembly on the sliding seat 203, thereby changing the initial distance between the two clamping mechanisms 2 to accommodate the approximate size range of the workpiece. The limiting scale set on the base 1 along the extension direction of the horizontal guide rail 101 provides the operator with an intuitive distance reference, facilitating quick determination of the initial adjustment position.

[0027] The driving mechanism 3 includes a bidirectional lead screw 301 and a drive motor 302. The bidirectional lead screw 301 is rotatably connected to the base 1 and is arranged along the extension direction of the horizontal guide rail 101. The two ends of the bidirectional lead screw 301 are respectively threadedly connected to two sets of clamping mechanisms 2. The output shaft of the drive motor 302 is connected to the bidirectional lead screw 301 in a transmission manner.

[0028] After the initial spacing is set, the drive mechanism 3 begins operation. The drive motor 302 (servo motor) starts, transmitting power to the bidirectional lead screw 301 via the worm gear reducer 303. Since the bidirectional lead screw 301 is rotatably connected to the base 1 and its two ends are threadedly connected to two sets of clamping mechanisms 2 respectively, with opposite thread directions at both ends, when the bidirectional lead screw 301 rotates, the two sets of clamping mechanisms 2 slide in opposite directions on the horizontal guide rail 101, achieving relative proximity or separation. Sensors on the base 1 monitor the position of the clamping mechanisms 2 in real time and feed the signals back to the control system. When the sensors detect that the clamping mechanisms 2 have moved to the preset approximate clamping position, the control system issues a command, and the drive motor 302 stops rotating, completing the coarse positioning adjustment.

[0029] The adjustment mechanism 4 includes an adjustment handwheel 402 and a limiting screw 401 disposed on both sides of the sliding seat 203. The limiting screw 401 is connected to the gripper assembly, and the adjustment handwheel 402 is fixed to one end of the limiting screw 401.

[0030] After coarse positioning, fine adjustments are made using the micro-adjustment structure in the gripper assembly to address minor differences in workpiece dimensions. The main gripper 201 is fixed to the sliding seat 203, and the secondary gripper 202 is slidably embedded in the dovetail groove 205 of the main gripper 201 via a dovetail block 204. Rotating the micro-adjustment screw, since the micro-adjustment screw is threadedly connected to the main gripper 201, converts its rotation into axial movement, thereby pushing the secondary gripper 202 to slide within the dovetail groove 205. This precisely adjusts the distance between the main gripper 201 and the secondary gripper 202 to accommodate the precise dimensions of the workpiece and ensure accurate clamping.

[0031] When clamping the workpiece, the inner arc-shaped clamping surface 206 of the main jaw 201 contacts the workpiece. The arc design better conforms to the outer contour of the workpiece, increasing the contact area. Anti-slip protrusions spaced apart on the arc-shaped clamping surface 206 increase the friction between the workpiece and the jaw, preventing slippage during processing. Simultaneously, the elastic buffer pad 207 (made of nitrile rubber) on one side of the sliding seat 203 contacts the workpiece. The elastic buffer pad 207 has excellent cushioning performance, absorbing vibrations and impacts generated during processing and reducing damage to the workpiece. The push rod 102 on the base 1 engages with the hemispherical groove on the elastic buffer pad 207, providing support and positioning for the elastic buffer pad 207, ensuring the stability of the cushioning effect.

[0032] Furthermore, the sliding seat 203 is slidably sleeved on the horizontal guide rail 101 and threadedly connected to the bidirectional lead screw 301. The gripper assembly includes a main gripper 201 fixed on the sliding seat 203 and a secondary gripper 202 slidably disposed on the main gripper 201. A fine-tuning structure for adjusting the distance between the main gripper 201 and the secondary gripper 202 is provided.

[0033] The fine-tuning structure includes a dovetail groove 205 formed on the main jaw 201 and a dovetail block 204 disposed on the secondary jaw 202. The dovetail block 204 is slidably embedded in the dovetail groove 205. A fine-tuning screw is also threadedly connected to the main jaw 201, and one end of the fine-tuning screw is rotatably connected to the secondary jaw 202.

[0034] The adjustment mechanism 4 allows for a wide range of adjustments to the initial spacing of the clamping mechanism 2, meeting the clamping requirements of workpieces of different sizes. The fine-tuning structure enables precise adjustment of the clamping spacing, adapting to subtle differences in workpiece size. The combination of these two mechanisms allows the device to flexibly clamp workpieces of various sizes without frequent changes to the clamping mechanism, improving the equipment's versatility and production efficiency, and reducing production costs.

[0035] Furthermore, the main gripper 201 has an arc-shaped clamping surface 206 on its inner side, and anti-slip protrusions are spaced apart on the arc-shaped clamping surface 206. The design of the arc-shaped clamping surface 206 and the anti-slip protrusions increases the clamping force and friction, ensuring that the workpiece is stable and reliable during processing and will not slip or shift. The elastic buffer pad 207 can effectively absorb vibration and impact, reduce damage to the workpiece surface during processing, and protect the appearance and precision of the workpiece. The cooperation between the push rod 102 and the hemispherical groove makes the force on the elastic buffer pad 207 more uniform and the buffering effect more stable, further improving the stability and reliability of clamping.

[0036] Furthermore, the base 1 is also equipped with a limit scale, which is set along the extension direction of the horizontal guide rail 101. The limit scale provides the operator with an intuitive distance reference, facilitating quick initial adjustments. The design of the adjusting handwheel 402 and the fine-tuning screw allows the operator to easily adjust the distance, making operation simple and convenient. The automated control of the drive mechanism 3 reduces manual intervention, improves the automation level of the clamping process, shortens the workpiece clamping time, and improves production efficiency.

[0037] Furthermore, the drive motor 302 and the bidirectional lead screw 301 are connected by a worm gear reducer 303. The drive motor 302 is a servo motor, and the base 1 is equipped with a sensor for detecting the clamping position.

[0038] The base 1 is also provided with a top rod 102 connected to the elastic buffer pad 207. The elastic buffer pad 207 is made of nitrile rubber and has a hemispherical groove that matches the end of the top rod 102.

[0039] The drive mechanism 3 employs a servo motor and a worm gear reducer 303 for transmission. The servo motor features high-precision speed and position control, while the worm gear reducer 303 offers smooth transmission and excellent self-locking performance. It can precisely control the rotation angle and speed of the bidirectional lead screw 301, thereby accurately controlling the movement distance and position of the clamping mechanism 2. Sensors monitor the clamping position in real time and provide feedback to the control system, achieving closed-loop control and further improving the accuracy of the clamping position, thus ensuring high-precision machining of the workpiece.

[0040] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An automated machining clamping device adaptable to workpieces of various sizes, characterized in that: It includes a base, two sets of clamping mechanisms symmetrically arranged on the base, a driving mechanism for driving the clamping mechanisms to move closer or further apart, and an adjustment mechanism for adjusting the initial distance between the clamping mechanisms. The base is also provided with a horizontal guide rail. The two sets of clamping mechanisms are slidably connected to the two ends of the horizontal guide rail. The clamping mechanism includes a sliding seat, a gripper assembly, and an elastic buffer pad provided on one side of the sliding seat. The driving mechanism includes a bidirectional lead screw and a drive motor. The bidirectional lead screw is rotatably connected to the base and is arranged along the extension direction of the horizontal guide rail. The two ends of the bidirectional lead screw are respectively threaded to two sets of clamping mechanisms. The output shaft of the drive motor is drivenly connected to the bidirectional lead screw. The adjustment mechanism includes an adjustment handwheel and a limiting screw disposed on both sides of the sliding seat. The limiting screw is connected to the gripper assembly, and the adjustment handwheel is fixed to one end of the limiting screw.

2. The automated machining clamping device for workpieces of various sizes according to claim 1, characterized in that: The sliding seat is slidably sleeved on the horizontal guide rail and threadedly connected to the bidirectional lead screw. The gripper assembly includes a main gripper fixed on the sliding seat and a secondary gripper slidably disposed on the main gripper. A fine-tuning structure for adjusting the distance between the main gripper and the secondary gripper is provided.

3. The automated machining clamping device for workpieces of various sizes according to claim 2, characterized in that: The fine-tuning structure includes a dovetail groove on the main jaw and a dovetail block on the secondary jaw. The dovetail block is slidably embedded in the dovetail groove. A fine-tuning screw is also threadedly connected to the main jaw, and one end of the fine-tuning screw is rotatably connected to the secondary jaw.

4. The automated machining clamping device for workpieces of various sizes according to claim 2, characterized in that: The main gripper has an arc-shaped gripping surface on its inner side, and anti-slip protrusions are spaced apart on the arc-shaped gripping surface.

5. The automated machining clamping device for workpieces of various sizes according to claim 1, characterized in that: The base is also provided with a limit scale, which is set along the extension direction of the horizontal guide rail.

6. The automated machining clamping device for workpieces of multiple sizes according to claim 1, characterized in that: The drive motor and the bidirectional lead screw are connected by a worm gear reducer. The drive motor is a servo motor, and the base is equipped with a sensor for detecting the clamping position.

7. The automated machining clamping device for workpieces of multiple sizes according to claim 1, characterized in that: The base is also provided with a top rod connected to the elastic buffer pad. The elastic buffer pad is made of nitrile rubber and has a hemispherical groove that matches the end of the top rod.

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