Clamping jaw clamping mechanism of numerical control machine tool

Abstract

The utility model relates to the technical field of clamping jaws of numerical control machine tools, in particular to a clamping jaw clamping mechanism of a numerical control machine tool, which comprises a base, an adjusting mechanism and a slider, the adjusting mechanism is mounted on the inner wall of the base, the slider is slidably connected to the inner wall of the base, the slider is meshed with the driving end of the adjusting mechanism, and the adjusting mechanism is mounted on the base. An end cover is fixedly connected to the side surface of the base, an assisting device is arranged on the surface of the sliding block and comprises a clamping assembly, the clamping assembly comprises a connecting plate, the connecting plate is installed on the surface of the sliding block, and a first clamping plate is fixedly connected to the side, away from the sliding block, of the connecting plate. According to the clamping jaw, the assisting device is arranged, so that the clamping jaw can stably clamp a rectangular workpiece and a cylindrical workpiece after being adjusted, the problem that the clamping effect on the rectangular workpiece is poor due to the fact that the clamping end of the clamping jaw is in an arc-shaped design is solved, the clamping effect of the clamping jaw is further improved, and the application range of the clamping jaw is further widened.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tool chuck technology, and in particular to a chuck clamping mechanism for CNC machine tools. Background Technology

[0002] CNC machine tool chucks are an important component of CNC machine tools. They are typically made of high-strength metal and are used to firmly clamp workpieces. The performance of CNC machine tool chucks directly affects machining accuracy and efficiency. High-quality chucks provide strong clamping force, ensuring that the workpiece does not shift during machining, thus providing strong support for efficient and high-quality machining on CNC machine tools.

[0003] Existing technologies, such as the utility model patent with publication number CN213857126U, disclose a chuck clamping mechanism for CNC machine tools. This patent uses a three-jaw chuck, movable jaws, and a clamping block. The clamping block has a groove on its end face facing the cylindrical through hole. Two rotating shaft support blocks are provided at the bottom of the groove. An adjusting block is provided in the groove. A protrusion is provided in the middle area of ​​the bottom of the adjusting block. Rotating shafts are provided at both ends of the protrusion. Two springs are provided on the bottom surface of the protrusion. The rotating shafts are rotatably connected to the rotating shaft support blocks. The ends of the two springs are respectively connected to the bottom surface of the groove. This solves the problem that the fixture can only be used to clamp cylindrical workpieces with uniform outer diameter. For workpieces with uneven outer diameter, such as workpieces with conical ends, the fixture cannot achieve stable clamping.

[0004] In the process of clamping workpieces with jaws, existing jaw clamping mechanisms, such as those mentioned above, have limited clamping distance and their clamping surfaces are designed with an arc shape. When clamping rectangular workpieces, the clamping contact area with the rectangular tool is small, resulting in poor clamping stability of the rectangular workpiece. This causes the rectangular workpiece to wobble easily during clamping and processing, leading to a reduction in processing accuracy. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies where the clamping contact surface between the rectangular workpiece and the rectangular tool is small, resulting in poor clamping stability and easy shaking of the rectangular workpiece during clamping and processing, thus reducing processing accuracy. Therefore, this invention proposes a chuck clamping mechanism for CNC machine tools.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a chuck clamping mechanism for a CNC machine tool, comprising a base, an adjusting mechanism, and a slider. The adjusting mechanism is installed on the inner wall of the base, and the slider is slidably connected to the inner wall of the base. The slider engages with the driving end of the adjusting mechanism. An end cap is fixedly connected to the side surface of the base. An assisting device is provided on the surface of the slider. The assisting device includes a clamping assembly, which includes a connecting plate. The connecting plate is installed on the surface of the slider, and the side of the connecting plate away from the slider is fixed. A clamping plate is connected to the first clamping plate. A positioning frame is fixedly connected to the side of the connecting plate away from the slider. A clamping plate is rotatably connected to the surface of the positioning frame. A pressing post is slidably connected to the inner wall of the positioning frame. A locking pin is fixedly connected to the arc surface of the pressing post. A limit spring is fixedly connected to the end of the pressing post near the slider. The end of the limit spring away from the pressing post is fixedly connected to the inner wall of the positioning frame. A storage cavity is opened on the surface of the clamping plate. Multiple insertion holes arranged in a circular array are opened on the inner wall of the storage cavity of the clamping plate. The locking pin is inserted into the inner wall of the insertion hole.

[0007] Preferably, the assisting device further includes a fixing component, which includes a threaded post. The surface of the connecting plate has a mounting hole, and the threaded post is inserted into the inner wall of the mounting hole. An internal hexagonal nut is fixedly connected to the side of the threaded post away from the slider. The surface of the slider has a threaded groove, and the threaded post is threadedly connected to the inner wall of the threaded groove. By screwing the threaded post into the threaded groove, the position of the connecting plate is fixed, thereby realizing the installation operation of the connecting plate.

[0008] Preferably, a rubber pad is fixedly connected to the surface of the second clamping plate, and a reinforcing rib is fixedly connected to the surface of the first clamping plate. The reinforcing rib is fixedly connected to the side surface of the connecting plate. The rubber pad can increase the friction between the second clamping arm and the workpiece, thereby improving the clamping effect of the second clamping plate on the workpiece.

[0009] Preferably, the positioning frame is in contact with the surface of clamping plate one, and the positioning frame is in contact with the surface of clamping plate two. The end of clamping plate two near clamping plate one is arc-shaped. The pressing column penetrates the side surface of the positioning frame. The positioning frame can constrain the position of clamping plate two and limit the rotation axis of clamping plate two.

[0010] Preferably, there are two locking pins arranged in a circumferential array about the pressing post. The locking pins are slidably connected to the inner wall of the positioning frame. The locking pins are located inside the storage cavity. The end of the locking pin away from the pressing post is arc-shaped. The locking pins can lock the position of the clamping plate two when it is inserted into the insertion hole.

[0011] Preferably, the threaded post penetrates the side surface of the connecting plate, and the internal hexagonal nut is inserted into the inner wall of the mounting hole. Through the cooperation between the internal hexagonal nut and the mounting hole, the position of the connecting plate can be locked when the threaded post is tightened.

[0012] Preferably, there are two reinforcing ribs, which are arranged symmetrically about the slider. The reinforcing ribs can increase the structural strength between the connecting plate and the clamping plate, thereby improving the stability of the clamping plate.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] In this invention, by setting an assisting device, the chuck can stably clamp rectangular and cylindrical workpieces after adjustment, thereby reducing the problem that the chuck clamping end adopts an arc design, resulting in poor clamping effect on rectangular workpieces, and further improving the clamping effect and applicability of the chuck. Attached Figure Description

[0015] Figure 1 This utility model provides a three-dimensional structural diagram of a chuck clamping mechanism for a CNC machine tool;

[0016] Figure 2 A bottom view of the jaw clamping mechanism for a CNC machine tool is provided for this utility model.

[0017] Figure 3 This utility model provides a schematic diagram of the assisting device structure for the jaw clamping mechanism of a CNC machine tool;

[0018] Figure 4 This utility model provides a partial structural diagram of a chuck clamping mechanism for a CNC machine tool;

[0019] Figure 5 This utility model proposes a chuck clamping mechanism for CNC machine tools. Figure 4 Schematic diagram of the structure at point A in the middle.

[0020] Legend:

[0021] 1. Base; 2. Adjustment mechanism; 3. Slider; 4. End cap; 5. Assisting device; 51. Clamping assembly; 511. Connecting plate; 512. Clamping plate one; 513. Positioning frame; 514. Clamping plate two; 515. Rubber pad; 516. Pressing post; 517. Locking pin; 518. Limiting spring; 519. Insertion hole; 5110. Reinforcing rib; 52. Fixing assembly; 521. Mounting hole; 522. Threaded post; 523. Socket head cap nut; 524. Threaded groove. Detailed Implementation

[0022] Please see Figure 1-Figure 5This utility model provides a technical solution: a chuck clamping mechanism for a CNC machine tool, including a base 1, an adjusting mechanism 2 and a slider 3. The adjusting mechanism 2 is installed on the inner wall of the base 1, and the slider 3 is slidably connected to the inner wall of the base 1. The slider 3 is engaged with the driving end of the adjusting mechanism 2. An end cover 4 is fixedly connected to the side surface of the base 1, and an assisting device 5 is provided on the surface of the slider 3.

[0023] In this embodiment: the assisting device 5 includes a clamping assembly 51, which includes a connecting plate 511. The connecting plate 511 is mounted on the surface of the slider 3. A clamping plate 512 is fixedly connected to the side of the connecting plate 511 away from the slider 3. A positioning frame 513 is fixedly connected to the side of the connecting plate 511 away from the slider 3. A clamping plate 514 is rotatably connected to the surface of the positioning frame 513. A pressing post 516 is slidably connected to the inner wall of the positioning frame 513. A locking pin 517 is fixedly connected to the arc surface of the pressing post 516. A limit spring 518 is fixedly connected to the end of the pressing post 516 near the slider 3. The end of the limit spring 518 away from the pressing post 516 is fixedly connected to the inner wall of the positioning frame 513. A storage cavity is opened on the surface of the clamping plate 514. A plurality of insertion holes 519 arranged in a circular array are opened on the inner wall of the storage cavity of the clamping plate 514. The locking pin 517 is inserted into the inner wall of the insertion hole 519.

[0024] Specifically, the assisting device 5 also includes a fixing component 52, which includes a threaded post 522. The surface of the connecting plate 511 has a mounting hole 521. The threaded post 522 is inserted into the inner wall of the mounting hole 521. An internal hexagon nut 523 is fixedly connected to the side of the threaded post 522 away from the slider 3. The surface of the slider 3 has a threaded groove 524. The threaded post 522 is threadedly connected to the inner wall of the threaded groove 524. By screwing the threaded post 522 into the threaded groove 524, the position of the connecting plate 511 is fixed, thereby realizing the installation operation of the connecting plate 511.

[0025] Specifically, a rubber pad 515 is fixedly connected to the surface of the second clamping plate 514, and a reinforcing rib 5110 is fixedly connected to the surface of the first clamping plate 512. The reinforcing rib 5110 is fixedly connected to the side surface of the connecting plate 511.

[0026] In this embodiment, the friction between the second clamping arm and the workpiece can be increased by the rubber pad 515, so as to improve the clamping effect of the second clamping plate 514 on the workpiece.

[0027] Specifically, the positioning frame 513 is in contact with the surface of the first clamping plate 512, and the positioning frame 513 is in contact with the surface of the second clamping plate 514. The end of the second clamping plate 514 near the first clamping plate 512 is arc-shaped. The pressing post 516 penetrates the side surface of the positioning frame 513. The positioning frame 513 can constrain the position of the second clamping plate 514 and limit the rotation axis of the second clamping plate 514.

[0028] In this embodiment: there are two locking pins 517. The two locking pins 517 are arranged in a circumferential array about the pressing post 516. The locking pins 517 are slidably connected to the inner wall of the positioning frame 513. The locking pins 517 are located inside the storage cavity. The end of the locking pin 517 away from the pressing post 516 is arranged in an arc shape.

[0029] In this embodiment, the position of the clamp 514 can be locked when it is inserted into the insertion hole 519 by means of the locking pin 517.

[0030] Specifically, the threaded post 522 penetrates the side surface of the connecting plate 511, and the internal hex nut 523 is inserted into the inner wall of the mounting hole 521. Through the cooperation between the internal hex nut 523 and the mounting hole 521, the position of the connecting plate 511 can be locked when the threaded post 522 is tightened.

[0031] Specifically, there are two reinforcing ribs 5110, which are arranged symmetrically about the slider 3.

[0032] In this embodiment, the structural strength between the connecting plate 511 and the clamping plate 512 can be increased by the reinforcing rib 5110, so as to improve the firmness of the clamping plate 512.

[0033] Working principle: When clamping a workpiece, insert the workpiece into the clamping area formed by the slider 3, rotate the adjusting mechanism 2, the adjusting mechanism 2 rotates and engages with the slider 3, and the slider 3 is driven to move towards the workpiece. The slider 3 clamps the workpiece during the movement.

[0034] When installing the clamping assembly 51, place the connecting plate 511 on the surface of the slider 3, take out the threaded post 522 for fixing, insert the threaded post 522 into the mounting hole 521, and when the threaded post 522 passes through the mounting hole 521 and enters the threaded groove 524, rotate the internal hex nut 523. The internal hex nut 523 rotates the threaded post 522, and the threaded post 522 is screwed into the threaded groove 524. When the threaded post 522 is tightened, fix the other threaded post 522 according to the above steps, and then fix the connecting plate 511 on the surface of the slider 3 to realize the installation operation of the clamping assembly 51.

[0035] When the chuck needs to clamp a cylindrical workpiece, the pressing column 516 is pushed, which in turn pushes the locking pin 517. The locking pin 517 is pushed out of the insertion hole 519 and loses its locking effect on the second clamping plate 514. At the same time, the limiting spring 518 is compressed and deformed by the pressing column 516, pushing the second clamping plate 514. Under the guidance of the positioning frame 513, the second clamping plate 514 drives the rubber pad 515 to rotate. When the second clamping plate 514 rotates to the angle suitable for the workpiece, the pressing column 516 is released. The pressing column 516 loses the pressure applied to the limiting spring 518, and the limiting spring 518 pushes the pressing column 516 and the locking pin 517 to reset. During the reset process, the locking pin 517... Insert into another socket 519. When the locking pin 517 is not aligned with the socket 519, fine-tune the clamping plate 514 so that the socket 519 on the surface of the clamping plate 514 is aligned with the locking pin 517. When the locking pin 517 is reinserted into the socket 519, the position of the clamping plate 514 can be locked again. Then the jaws can clamp the circumferential workpiece. By setting the assisting device 5, the jaws can stably clamp rectangular and cylindrical workpieces after adjustment, thereby reducing the problem that the clamping effect of rectangular workpieces is poor due to the arc design of the jaw clamping end, and further improving the clamping effect and applicability of the jaws.

Claims

1. A chuck clamping mechanism for a CNC machine tool, comprising a base (1), an adjusting mechanism (2), and a slider (3), characterized in that: The adjusting mechanism (2) is installed on the inner wall of the base (1). A slider (3) is slidably connected to the inner wall of the base (1). The slider (3) engages with the driving end of the adjusting mechanism (2). An end cap (4) is fixedly connected to the side surface of the base (1). An assisting device (5) is provided on the surface of the slider (3). The assisting device (5) includes a clamping assembly (51). The clamping assembly (51) includes a connecting plate (511). The connecting plate (511) is installed on the surface of the slider (3). A clamping plate (512) is fixedly connected to the side of the connecting plate (511) away from the slider (3). A positioning frame (513) is fixedly connected to the side of the connecting plate (511) away from the slider (3). The positioning frame (513) is rotatably connected to a clamping plate (514), and the inner wall of the positioning frame (513) is slidably connected to a pressing column (516). The arc surface of the pressing column (516) is fixedly connected to a locking pin (517). A limiting spring (518) is fixedly connected to one end of the pressing column (516) near the slider (3). The end of the limiting spring (518) away from the pressing column (516) is fixedly connected to the inner wall of the positioning frame (513). The surface of the clamping plate (514) is provided with a storage cavity. The inner wall of the clamping plate (514) located in the storage cavity is provided with a plurality of insertion holes (519) arranged in a circular array. The locking pin (517) is inserted into the inner wall of the insertion hole (519).

2. The chuck clamping mechanism for a CNC machine tool according to claim 1, characterized in that: The assisting device (5) further includes a fixing component (52), which includes a threaded post (522). The surface of the connecting plate (511) is provided with a mounting hole (521). The threaded post (522) is inserted into the inner wall of the mounting hole (521). An internal hexagonal nut (523) is fixedly connected to the side of the threaded post (522) away from the slider (3). The surface of the slider (3) is provided with a threaded groove (524). The threaded post (522) is threadedly connected to the inner wall of the threaded groove (524).

3. The chuck clamping mechanism for a CNC machine tool according to claim 1, characterized in that: A rubber pad (515) is fixedly connected to the surface of the second clamping plate (514), and a reinforcing rib (5110) is fixedly connected to the surface of the first clamping plate (512). The reinforcing rib (5110) is fixedly connected to the side surface of the connecting plate (511).

4. The chuck clamping mechanism for a CNC machine tool according to claim 1, characterized in that: The positioning frame (513) is in contact with the surface of the first clamping plate (512), and the positioning frame (513) is in contact with the surface of the second clamping plate (514). The second clamping plate (514) is arc-shaped at one end near the first clamping plate (512), and the pressing column (516) penetrates the side surface of the positioning frame (513).

5. The chuck clamping mechanism for a CNC machine tool according to claim 1, characterized in that: There are two locking pins (517), which are arranged in a circumferential array about the pressing post (516). The locking pins (517) are slidably connected to the inner wall of the positioning frame (513). The locking pins (517) are located inside the storage cavity. The end of the locking pin (517) away from the pressing post (516) is arc-shaped.

6. The chuck clamping mechanism for a CNC machine tool according to claim 2, characterized in that: The threaded post (522) penetrates the side surface of the connecting plate (511), and the internal hexagonal nut (523) is inserted into the inner wall of the mounting hole (521).

7. The chuck clamping mechanism for a CNC machine tool according to claim 3, characterized in that: The number of the reinforcing ribs (5110) is two, and the two reinforcing ribs (5110) are arranged symmetrically about the slider (3).

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