Workpiece clamping tool for CNC numerical control machine tool

Abstract

The workpiece clamping tool for the CNC machine tool comprises a machine tool body, a first clamping seat and a second clamping seat are arranged above the machine tool body, one side of the first clamping seat and one side of the second clamping seat are each provided with a U-shaped clamping frame, one side of each U-shaped clamping frame is provided with a connecting shaft, and the other side of each U-shaped clamping frame is provided with a connecting rod. The connecting shaft is rotationally connected with the first clamping base and the second clamping base, the other side of the first clamping base and the other side of the second clamping base are each provided with a second motor, bearings are arranged at the contact positions of the connecting shaft and the first clamping base and the contact positions of the connecting shaft and the second clamping base, and a clamping plate is arranged on the inner side of the U-shaped clamping frame. According to the clamping tool, workpieces of different sizes can be quickly clamped and fixed, in the machining process, the clamping tool can be matched with the action of a machining tool to turn over the clamped workpieces, the workpiece clamping angle is changed, the workpieces are conveniently machined, and the workpiece machining efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of CNC machine tools, and particularly relates to a workpiece clamping tool for a CNC machine tool. Background Technique

[0002] CNC machine tools are important processing equipment, integrating various functions such as cutting, milling, and drilling, and having a high degree of automation. During use, they can be connected to a central computer to accurately implement the instructions of the central computer. For CNC machine tools, a clamping tool is an essential auxiliary tool in the processing process. During the workpiece processing operation, the clamping tool mostly plays the role of fixing and positioning the workpiece.

[0003] The Chinese patent publication number is CN213080747U, and the authorization announcement date is April 30, 2021. A workpiece clamping device for a CNC machine tool used for precision mold processing includes a machine tool main body, a pair of clamping bases, and a pair of power components. A pair of symmetric clamping bases are provided on the machine tool main body, a pair of clamping components are provided on the pair of clamping bases, and a pair of power components are embedded in the pair of clamping bases. The utility model relates to the technical field of precision mold processing. This workpiece clamping device for a CNC machine tool uses automatic control for workpiece clamping, uses a synchronously driven clamping disk, and a resistance increasing block made of replaceable rubber material is arranged at the contact part between the clamping block and the workpiece. The resistance increasing block is used to increase the contact area, reduce the friction on the workpiece surface under the premise of fixation, and at the same time, since the resistance increasing block can be replaced, different shaped workpieces can be matched, which is very convenient to operate and has strong versatility.

[0004] The existing clamping tool has a relatively simple structure and can meet the simple clamping and fixing requirements of workpieces. The adjustability of the clamping tool is relatively poor. When cooperating with the movement of the processing tool, the angle of the clamped workpiece cannot be quickly and accurately adjusted, and the workpiece needs to be re-clamped manually, reducing the workpiece processing efficiency and not meeting the use requirements. Content of the Utility Model

[0005] The purpose of the utility model is to provide a workpiece clamping tool for a CNC machine tool to solve the problems raised in the above background technique, that is, the existing clamping tool has a relatively simple structure, can meet the simple clamping and fixing requirements of workpieces, the adjustability of the clamping tool is relatively poor, when cooperating with the movement of the processing tool, the angle of the clamped workpiece cannot be quickly and accurately adjusted, the workpiece needs to be re-clamped manually, reducing the workpiece processing efficiency and not meeting the use requirements.

[0006] To achieve the above object, the present utility model provides the following technical solution: A workpiece clamping tooling for a CNC machine tool, including a machine tool main body, a first clamping seat and a second clamping seat are arranged above the machine tool main body, and the first clamping seat is fixedly connected to the machine tool main body. U-shaped clamping frames are arranged on one side of the first clamping seat and the second clamping seat. A connecting shaft is arranged on one side of the U-shaped clamping frame, and one end of the connecting shaft is fixedly connected to the U-shaped clamping frame. The connecting shaft is rotatably connected to both the first clamping seat and the second clamping seat. Second motors are arranged on the other side of the first clamping seat and the second clamping seat, and the second motors are connected to the first clamping seat and the second clamping seat by screws. The output end of the second motor is connected to the other end of the connecting shaft. Bearings are arranged at the contact positions between the connecting shaft and the first clamping seat and the second clamping seat, and the bearings are arranged outside the connecting shaft. A clamping plate is arranged inside the U-shaped clamping frame, and a first electric push rod is arranged above the clamping plate, and the first electric push rod is fixedly connected to the U-shaped clamping frame and the clamping plate.

[0007] Preferably, rubber blocks are arranged at the bottom of the U-shaped clamping frame and the lower end of the clamping plate, and the rubber blocks are integrally connected to the U-shaped clamping frame and the clamping plate.

[0008] Preferably, a second sliding groove is arranged on the inner wall of the U-shaped clamping frame, a second sliding block is arranged inside the second sliding groove, and the second sliding block is slidably connected to the U-shaped clamping frame. The second sliding block is arranged on one side of the clamping plate and is fixedly connected to the clamping plate.

[0009] Preferably, a rolling groove is arranged on the back of the U-shaped clamping frame, first balls are arranged on the end faces of the first clamping seat and the second clamping seat. There are six first balls, and the six first balls are circularly and equidistantly arranged on the first clamping seat and the second clamping seat. One end of the first ball extends into the rolling groove, and the first ball is in rolling connection with the first clamping seat, the second clamping seat and the U-shaped clamping frame.

[0010] Preferably, a reserved cavity is arranged inside the second clamping seat, a fixing block is arranged inside the reserved cavity, and the fixing block is slidably connected to the second clamping seat. The fixing block is arranged above the connecting shaft, and a second electric push rod is arranged above the fixing block, and the second electric push rod is fixedly connected to the second clamping seat and the fixing block.

[0011] Preferably, a first sliding groove is provided at the upper end of the machine tool main body. A first sliding block is arranged inside the first sliding groove, and the first sliding block is slidably connected to the machine tool main body. The first sliding block is arranged below the second clamping seat and is fixedly connected to the second clamping seat. A threaded hole is provided on the first sliding block. A first motor is arranged on one side of the machine tool main body, and the first motor is connected to the machine tool main body by screws. A lead screw is arranged inside the first sliding groove, and the lead screw is arranged through the threaded hole. One end of the lead screw is connected to the output end of the first motor, and the lead screw is threadedly connected to the first sliding block.

[0012] Preferably, second balls are arranged at the lower end of the second clamping seat, and the second balls are arranged on both sides of the first sliding block. The second balls are in contact with the upper end of the machine tool main body, and the second balls are rotatably connected to both the machine tool main body and the second clamping seat.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] Through the settings of the U-shaped clamping frame, the clamping plate, the first electric push rod, the second motor and the connecting shaft, the first electric push rod drives the clamping plate to move up and down, and the clamping plate contacts the workpiece for clamping. The second motor drives the connecting shaft to rotate, and as the connecting shaft rotates, the clamped workpiece is driven to flip, changing the clamping angle of the workpiece;

[0015] Through the settings of the reserved cavity, the fixed block and the second electric push rod, the second electric push rod drives the fixed block to move up and down in the reserved cavity, and the fixed block is in close contact with the connecting shaft, playing a limiting role on the connecting shaft;

[0016] Through the settings of the first sliding groove, the first sliding block, the lead screw and the first motor, the first motor drives the lead screw to rotate, and as the lead screw rotates, the second clamping seat is driven to move along the first sliding groove, changing the distance between the first clamping seat and the first sliding groove, and can meet the clamping requirements of workpieces of different lengths. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is a connection relationship diagram of the second clamping seat of the present utility model with the machine tool main body and the U-shaped clamping frame;

[0019] Figure 3 is of the present utility model Figure 2 partial enlarged view of Area A;

[0020] Figure 4 is a connection relationship diagram of the second clamping seat of the present utility model with the machine tool main body;

[0021] In the figure: 1, machine tool main body; 2, first clamping seat; 3, second clamping seat; 4, first sliding groove; 5, first slider; 6, lead screw; 7, first motor; 8, U-shaped clamping frame; 9, clamping plate; 10, first electric push rod; 11, rubber block; 12, second electric push rod; 13, second motor; 14, reserved cavity; 15, fixed block; 16, threaded hole; 17, rolling groove; 18, first ball; 19, connecting shaft; 20, bearing; 21, second sliding groove; 22, second slider; 23, second ball. Detailed implementation manner

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0023] Please refer to Figures 1-4 , an embodiment provided by the present invention: A workpiece clamping tool for a CNC machine tool, including a machine tool main body 1. A first clamping seat 2 and a second clamping seat 3 are arranged above the machine tool main body 1, and the first clamping seat 2 is fixedly connected to the machine tool main body 1. U-shaped clamping frames 8 are arranged on one side of the first clamping seat 2 and the second clamping seat 3. A connecting shaft 19 is arranged on one side of the U-shaped clamping frame 8, and one end of the connecting shaft 19 is fixedly connected to the U-shaped clamping frame 8. The connecting shaft 19 is rotatably connected to both the first clamping seat 2 and the second clamping seat 3. Second motors 13 are arranged on the other side of the first clamping seat 2 and the second clamping seat 3, and the second motors 13 are connected to both the first clamping seat 2 and the second clamping seat 3 by screws. The output end of the second motor 13 is connected to the other end of the connecting shaft 19. Bearings 20 are arranged at the contact positions between the connecting shaft 19 and the first clamping seat 2 and the second clamping seat 3, and the bearings 20 are arranged outside the connecting shaft 19. A clamping plate 9 is arranged inside the U-shaped clamping frame 8, and a first electric push rod 10 is arranged above the clamping plate 9, and the first electric push rod 10 is fixedly connected to the U-shaped clamping frame 8 and the clamping plate 9.

[0024] During use: Bring the two ends of the workpiece into contact with the U-shaped clamping frame 8, drive the first electric push rod 10 to drive the clamping plate 9 to descend, and the clamping plate 9 comes into contact with the workpiece for clamping. Synchronously start the two second motors 13, and the second motors 13 drive the connecting shaft 19 to rotate. As the connecting shaft 19 rotates, the clamped workpiece is driven to flip, changing the clamping angle of the workpiece.

[0025] Please refer to Figure 1 , Figure 2 and Figure 3, rubber blocks 11 are provided at the bottom of the U-shaped clamping bracket 8 and the lower ends of the clamping plates 9, and the rubber blocks 11 are integrally connected to the U-shaped clamping bracket 8 and the clamping plates 9. A second chute 21 is provided on the inner wall of the U-shaped clamping bracket 8, a second slider 22 is provided inside the second chute 21, and the second slider 22 is slidably connected to the U-shaped clamping bracket 8. The second slider 22 is provided on one side of the clamping plate 9 and is fixedly connected to the clamping plate 9. A rolling groove 17 is provided on the back of the U-shaped clamping bracket 8. First balls 18 are provided on the end faces of the first clamping seat 2 and the second clamping seat 3. There are six first balls 18, and the six first balls 18 are circularly and equidistantly arranged on the first clamping seat 2 and the second clamping seat 3. One end of the first ball 18 extends into the rolling groove 17, and the first ball 18 is in rolling connection with the first clamping seat 2, the second clamping seat 3 and the U-shaped clamping bracket 8. The rubber block 11 is in direct contact with the workpiece, playing a protective role for the clamped workpiece. The second chute 21 and the second slider 22 play a guiding and limiting role for the moving clamping plate 9, ensuring that the clamping plate 9 contacts the workpiece smoothly. The first ball 18 rolls along the rolling groove 17 as the U-shaped clamping bracket 8 rotates, playing a guiding role for the rotating U-shaped clamping bracket 8 and also reducing the rotation resistance of the U-shaped clamping bracket 8 and improving the turning stability of the workpiece.

[0026] Please refer to Figure 1 and Figure 2 , a reserved cavity 14 is provided inside the second clamping seat 3, a fixed block 15 is provided inside the reserved cavity 14, and the fixed block 15 is slidably connected to the second clamping seat 3. The fixed block 15 is provided above the connecting shaft 19, and a second electric push rod 12 is provided above the fixed block 15. The second electric push rod 12 is fixedly connected to the second clamping seat 3 and the fixed block 15. The second electric push rod 12 drives the fixed block 15 to move up and down in the reserved cavity 14. The fixed block 15 is in close contact with the connecting shaft 19, playing a limiting role for the connecting shaft 19.

[0027] Please refer to Figure 1 , Figure 2 and Figure 4, a first chute 4 is provided at the upper end of the machine tool main body 1. A first slider 5 is arranged inside the first chute 4, and the first slider 5 is slidably connected to the machine tool main body 1. The first slider 5 is arranged below the second clamping seat 3 and fixedly connected to the second clamping seat 3. A threaded hole 16 is provided on the first slider 5. A first motor 7 is arranged on one side of the machine tool main body 1, and the first motor 7 is connected to the machine tool main body 1 by screws. A lead screw 6 is arranged inside the first chute 4, and the lead screw 6 is arranged through the threaded hole 16. One end of the lead screw 6 is connected to the output end of the first motor 7, and the lead screw 6 is threadedly connected to the first slider 5. Second balls 23 are arranged at the lower end of the second clamping seat 3, and the second balls 23 are arranged on both sides of the first slider 5. The second balls 23 are in contact with the upper end of the machine tool main body 1, and the second balls 23 are in rolling connection with both the machine tool main body 1 and the second clamping seat 3. The first motor 7 drives the lead screw 6 to rotate. As the lead screw 6 rotates, it drives the second clamping seat 3 to move along the first chute 4, changing the distance between the first clamping seat 2 and the first chute 4, and can meet the clamping requirements of workpieces of different lengths.

[0028] Working principle: According to the length of the workpiece, the first motor 7 is turned on to drive the lead screw 6 to rotate. As the lead screw 6 rotates, it drives the second clamping seat 3 to move along the first chute 4, changing the distance between the first clamping seat 2 and the first chute 4. After the second clamping seat 3 is adjusted, the two ends of the workpiece are brought into contact with the U-shaped clamping frame 8. The first electric push rod 10 is driven to drive the clamping plate 9 to descend, and the clamping plate 9 comes into contact with the workpiece for clamping; the second electric push rod 12 is driven to drive the fixed block 15 to descend in the reserved cavity 14, and the fixed block 15 is in close contact with the connecting shaft 19, playing a limiting role on the connecting shaft 19. The two second motors 13 are turned on synchronously, and the second motors 13 drive the connecting shaft 19 to rotate. As the connecting shaft 19 rotates, it drives the clamped workpiece to flip, changing the clamping angle of the workpiece.

[0029] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A workpiece clamping fixture for a CNC machine tool, comprising a machine tool body (1), characterized in that: A first clamping seat (2) and a second clamping seat (3) are arranged above the machine tool body (1), and the first clamping seat (2) is fixedly connected to the machine tool body (1); a U-shaped clamping frame (8) is arranged on one side of the first clamping seat (2) and the second clamping seat (3); a connecting shaft (19) is arranged on one side of the U-shaped clamping frame (8), and one end of the connecting shaft (19) is fixedly connected to the U-shaped clamping frame (8); the connecting shaft (19) is rotatably connected to the first clamping seat (2) and the second clamping seat (3); and a second motor (19) is arranged on the other side of the first clamping seat (2) and the second clamping seat (3). 3), and the second motor (13) is connected to the first clamping seat (2) and the second clamping seat (3) by screws, the output end of the second motor (13) is connected to the other end of the connecting shaft (19), the contact points between the connecting shaft (19) and the first clamping seat (2) and the second clamping seat (3) are provided with bearings (20), and the bearings (20) are arranged outside the connecting shaft (19), the inner side of the U-shaped clamping frame (8) is provided with a clamping plate (9), the upper side of the clamping plate (9) is provided with a first electric push rod (10), and the first electric push rod (10) is fixedly connected to the U-shaped clamping frame (8) and the clamping plate (9).

2. A workpiece clamping fixture for a CNC machine tool according to claim 1, characterized in that: The bottom of the U-shaped clamping frame (8) and the lower end of the clamping plate (9) are both provided with a rubber block (11), and the rubber block (11) is integrally connected to the U-shaped clamping frame (8) and the clamping plate (9).

3. The workpiece clamping fixture for a CNC machine tool according to claim 1, characterized in that: A second slide groove (21) is provided on the inner wall of the U-shaped clamping frame (8), a second slide block (22) is provided inside the second slide groove (21), and the second slide block (22) is slidably connected to the U-shaped clamping frame (8), the second slide block (22) is provided on one side of the clamping plate (9), and the second slide block (22) is fixedly connected to the clamping plate (9).

4. The workpiece clamping fixture for a CNC machine tool according to claim 1, characterized in that: The back of the U-shaped clamping frame (8) is provided with a rolling groove (17), and the end surfaces of the first clamping seat (2) and the second clamping seat (3) are provided with first balls (18), six first balls (18) are provided, and the six first balls (18) are circular and equidistantly arranged on the first clamping seat (2) and the second clamping seat (3), one end of the first ball (18) extends to the inside of the rolling groove (17), and the first ball (18) is rollingly connected to the first clamping seat (2), the second clamping seat (3) and the U-shaped clamping frame (8).

5. The workpiece clamping fixture for a CNC machine tool according to claim 1, characterized in that: A reserved cavity (14) is provided inside the second clamping seat (3), a fixed block (15) is provided inside the reserved cavity (14), and the fixed block (15) and the second clamping seat (3) are both slidably connected, the fixed block (15) is arranged above the connecting shaft (19), a second electric push rod (12) is arranged above the fixed block (15), and the second electric push rod (12) is fixedly connected to the second clamping seat (3) and the fixed block (15).

6. The workpiece clamping fixture for a CNC machine tool according to claim 1, characterized in that: A first slide groove (4) is provided at the upper end of the machine tool body (1), a first slider (5) is provided inside the first slide groove (4), and the first slider (5) is slidably connected to the machine tool body (1), the first slider (5) is arranged below the second clamping seat (3), and the first slider (5) is fixedly connected to the second clamping seat (3), a threaded hole (16) is provided on the first slider (5), a first motor (7) is provided on one side of the machine tool body (1), and the first motor (7) is connected to the machine tool body (1) by screws, a screw rod (6) is provided inside the first slide groove (4), and the screw rod (6) and the threaded hole (16) are connected, one end of the screw rod (6) is connected to the output end of the first motor (7), and the screw rod (6) is threadedly connected to the first slider (5).

7. The workpiece clamping fixture for a CNC machine tool according to claim 1, characterized in that: A second ball (23) is provided at the lower end of the second clamping seat (3), and the second ball (23) is provided on both sides of the first sliding block (5). The second ball (23) fits the upper end of the machine tool body (1), and the second ball (23) is rollingly connected to the machine tool body (1) and the second clamping seat (3).

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