Hydraulic clamping device for a numerically controlled machine tool

Abstract

This utility model provides a hydraulic clamping device for CNC machine tools, belonging to the field of machine tool tooling technology, including a base. Through the clamping components, this utility model allows the movable seat to slide on a crossbar during use. Once the movable seat is adjusted to a suitable position, the first semi-circular disc on the fixed seat and the movable seat clamps the workpiece from both sides. When the workpiece surface is not perfectly circular or has local protrusions or depressions, the second semi-circular disc, rotatably connected to the side wall of the first semi-circular disc, will begin to rotate. The second semi-circular disc adjusts its angle according to the shape changes of the workpiece surface to better fit the workpiece surface. Simultaneously, the third semi-circular disc, rotatably connected to the second semi-circular disc, will also rotate, further adapting to subtle changes in the workpiece surface, ultimately clamping the workpiece tightly and stably, greatly improving the versatility of the device and increasing production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of machine tool tooling technology, and more specifically, to a hydraulic clamping device for CNC machine tools. Background Technology

[0002] A CNC machine tool clamping device is a device used to fix a workpiece. It is commonly used on CNC machine tools and can ensure that the workpiece maintains a stable position and posture during the machining process in order to achieve precise machining.

[0003] A search revealed that Chinese Patent Publication No. CN222711571U discloses "a CNC machine tool clamping and fixing device, including a base, a telescopic column slidably connected inside the base, and a motor housing fixedly connected to the top of the telescopic column. This CNC machine tool clamping and fixing device, through the setting of a drive mechanism, a clamping mechanism, and clamping heads, allows for the clamping and fixing of a workpiece placed in the middle of the clamping heads by activating a hydraulic cylinder on the top of the support platform. The hydraulic cylinder drives a conical block on one side to press against two sets of rotating rods on the surface of the conical block. Under the action of a rotating shaft, the rotating rods drive two sets of clamping heads at the ends of the rotating shaft to move relative to each other. Furthermore, a servo motor inside the motor housing can be activated, driving the support platform on one side to rotate, thereby causing the clamping heads on the surface of the support platform to rotate accordingly. This allows for multi-angle adjustment of the clamped workpiece, facilitating processing of the workpiece from multiple angles by the operator." However, the following defects still exist:

[0004] (1) This device can only effectively clamp tooling with regular shapes. In actual production, the shapes of workpieces are diverse. In addition to common regular circles and squares, there are also a large number of irregular workpieces. The clamping head of the existing device cannot be flexibly adjusted according to the shape changes of the workpiece surface.

[0005] (2) In the prior art, when driving the clamping head to perform clamping action, it mainly relies on the single power transmission method of the hydraulic cylinder driving the conical block to squeeze the rotating rod. In this process, the power transmission path is relatively long and involves the interaction between multiple components. When the hydraulic cylinder outputs power, due to the influence of the above factors, the movement of the rotating rod may be uneven, which may cause the movement of the clamping head to vibrate or jam. To this end, a hydraulic clamping device for CNC machine tools is proposed. Utility Model Content

[0006] The purpose of this invention is to address the problem that existing devices can only effectively clamp tooling with regular shapes, while in actual production, workpieces come in a variety of shapes, including common regular circles and squares, as well as a large number of irregularly shaped workpieces. The existing devices cannot flexibly adjust the clamping head according to the shape changes of the workpiece surface. This invention provides a hydraulic clamping device for CNC machine tools to solve the problems mentioned in the background art.

[0007] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0008] The present invention is as follows: a hydraulic clamping device for a CNC machine tool, including a base, a clamping component for clamping a workpiece is provided on the base, a hydraulic drive component for driving the clamping component to perform clamping or releasing actions is provided on one side of the clamping component, and a control component for controlling the hydraulic drive component is provided on the base.

[0009] The clamping assembly includes a crossbar bolted to the side wall of the base, a fixed seat bolted to the inner side wall of the base, a movable seat slidably connected to the crossbar, a first semi-disc rotatably connected to both the fixed seat and the movable seat, a second semi-disc rotatably connected to the side wall of the first semi-disc, and a third semi-disc rotatably connected to the second semi-disc.

[0010] As a preferred technical solution of this utility model, the hydraulic drive assembly includes a hydraulic cylinder fixedly installed on the side wall of the base. The hydraulic cylinder is located above the crossbar. A rectangular plate is bolted to one side of the movable seat. The end of the piston rod of the hydraulic cylinder is fixedly connected to the side wall of the rectangular plate.

[0011] As a preferred technical solution of this utility model, the control component includes a control board fixedly installed on the top of the base, and multiple sets of operation buttons are fixedly provided on the control board. The multiple sets of operation buttons are electrically connected to the hydraulic cylinder.

[0012] As a preferred technical solution of this utility model, two sets of circular grooves are symmetrically arranged on the side walls of the first semi-disc and the second semi-disc. There are two sets of the second semi-disc, and both sets of the second semi-disc are rotatably connected to the circular grooves on the first semi-disc. There are two sets of the third semi-disc, and both sets of the third semi-disc are rotatably connected to the circular grooves on the second semi-disc. The side wall of the third semi-disc is bonded with silicone strips.

[0013] As a preferred technical solution of this utility model, a support platform is fixedly connected to the crossbar, and the support platform is located below the first semi-circular disk.

[0014] As a preferred technical solution of this utility model, a limiting post is fixedly provided on both the fixed seat and the movable seat, and a circular hole matching the outer diameter of the limiting post is opened at the center of the first semi-disc, and the first semi-disc is sleeved on the limiting post.

[0015] As a preferred technical solution of this utility model, the base is provided with four sets of threaded holes, which are evenly distributed at the four corners of the base.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. With the clamping components in place, the movable seat can slide on the crossbar during use. When the movable seat is adjusted to the appropriate position, the first semi-circular disc on the fixed seat and the movable seat clamps the workpiece from both sides. When the surface of the workpiece is not a perfectly regular circle or has local protrusions or depressions, the second semi-circular disc, which is rotatably connected to the side wall of the first semi-circular disc, will start to rotate. The second semi-circular disc adjusts its angle according to the shape changes of the workpiece surface to better fit the surface of the workpiece. At the same time, the third semi-circular disc, which is rotatably connected to the second semi-circular disc, will also rotate accordingly to further adapt to the subtle changes in the surface of the workpiece, and finally clamp the workpiece tightly and stably, which greatly improves the versatility of the device and increases production efficiency.

[0018] 2. With the hydraulic drive assembly in place, the extension of the hydraulic cylinder pushes the rectangular plate during use, which in turn drives the entire moving seat to slide smoothly along the crossbar toward the fixed seat. As the moving seat approaches, the first semi-circular discs on the fixed seat and the moving seat gradually surround the workpiece, ultimately clamping the workpiece tightly between the fixed seat and the moving seat, which facilitates subsequent processing operations. Attached Figure Description

[0019] Figure 1 A schematic diagram of the hydraulic clamping device for a CNC machine tool provided by this utility model;

[0020] Figure 2 One of the side perspective structural schematic diagrams of the hydraulic clamping device for CNC machine tools provided by this utility model;

[0021] Figure 3 A three-dimensional structural diagram of the bottom surface of the hydraulic clamping device for the CNC machine tool provided by this utility model;

[0022] Figure 4 A schematic diagram of the clamping assembly structure of the hydraulic clamping device for CNC machine tools provided by this utility model;

[0023] Figure 5 The second side perspective view of the hydraulic clamping device for CNC machine tools provided by this utility model.

[0024] The diagram shows: 1. Base; 2. Clamping assembly; 201. Crossbar; 202. Fixed seat; 203. Moving seat; 204. First semi-circular disc; 205. Second semi-circular disc; 206. Third semi-circular disc; 3. Hydraulic drive assembly; 301. Hydraulic cylinder; 302. Rectangular plate; 4. Control assembly; 401. Control board; 402. Operation button; 5. Silicone strip; 6. Support platform; 7. Limiting post; 8. Threaded hole. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0026] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0027] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] like Figure 1 As shown, this embodiment proposes a hydraulic clamping device for a CNC machine tool, including a base 1, a clamping assembly 2 for clamping workpieces is provided on the base 1, a hydraulic drive assembly 3 for driving the clamping assembly 2 to achieve clamping or releasing actions is provided on one side of the clamping assembly 2, and a control assembly 4 for controlling the hydraulic drive assembly 3 is provided on the base 1.

[0030] like Figure 2 Figure 4 and Figure 5As shown, the clamping assembly 2 includes a crossbar 201 bolted to the side wall of the base 1, a fixed seat 202 bolted to the inner side wall of the base 1, a movable seat 203 slidably connected to the crossbar 201, a first semi-circular disk 204 rotatably connected to both the fixed seat 202 and the movable seat 203, a second semi-circular disk 205 rotatably connected to the side wall of the first semi-circular disk 204, and a third semi-circular disk 206 rotatably connected to the second semi-circular disk 205. The first semi-circular disk 204, the second semi-circular disk 205 and the third semi-circular disk 206 are all angled according to the shape of the workpiece surface to better fit the workpiece surface for clamping. In use, the movable seat 203 can slide on the crossbar 201. When the movable seat 203 is adjusted to a suitable position, the first semi-circular disk 204 on the fixed seat 202 and the movable seat 203 clamps the workpiece from both sides. When the surface of the workpiece is not a perfectly regular circle or has local protrusions or depressions, the second semi-circular disk 205, which is rotatably connected to the side wall of the first semi-circular disk 204, will start to rotate. The second semi-circular disk 205 adjusts its angle according to the shape change of the workpiece surface to better fit the surface of the workpiece. At the same time, the third semi-circular disk 206, which is rotatably connected to the second semi-circular disk 205, will also rotate to further adapt to the subtle changes in the surface of the workpiece, and finally clamp the workpiece tightly and stably, which greatly improves the versatility of the device and increases production efficiency.

[0031] like Figure 2 As shown, the hydraulic drive assembly 3 includes a hydraulic cylinder 301 fixedly mounted to the side wall of the base 1. The hydraulic cylinder 301 is located above the crossbar 201. A rectangular plate 302 is bolted to one side of the movable seat 203. The end of the piston rod of the hydraulic cylinder 301 is fixedly connected to the side wall of the rectangular plate 302. In use, the extension of the hydraulic cylinder 301 pushes the rectangular plate 302, thereby driving the entire movable seat 203 to slide smoothly along the crossbar 201 toward the fixed seat 202. As the movable seat 203 approaches, the first semi-circular disk 204 on the fixed seat 202 and the movable seat 203 gradually surround the workpiece, ultimately clamping the workpiece tightly between the fixed seat 202 and the movable seat 203, facilitating subsequent processing operations.

[0032] like Figure 2 As shown, the control assembly 4 includes a control plate 401 fixedly mounted on the top of the base 1. Multiple sets of operation buttons 402 are fixedly mounted on the control plate 401, and these buttons 402 are electrically connected to the hydraulic cylinder 301. In use, the user can control the extension and retraction of the hydraulic cylinder 301 by pressing the operation buttons 402 on the control plate 401.

[0033] like Figure 5As shown, two sets of circular grooves are symmetrically arranged on the sidewalls of the first semicircular disk 204 and the second semicircular disk 205. There are two sets of the second semicircular disk 205, and both sets of the second semicircular disk 205 are rotatably connected to the circular grooves on the first semicircular disk 204. There are two sets of the third semicircular disk 206, and both sets of the third semicircular disk 206 are rotatably connected to the circular grooves on the second semicircular disk 205. A silicone strip 5 is adhered to the sidewall of the third semicircular disk 206. In use, the silicone strip 5 adhered to the sidewall of the third semicircular disk 206 will contact the surface of the workpiece. The silicone strip 5 has a certain degree of flexibility and elasticity, and can deform under pressure, further filling the tiny gaps between the third semicircular disk 206 and the surface of the workpiece, enhancing the tightness and stability of the clamping.

[0034] like Figure 2 and Figure 5 As shown, a support platform 6 is fixedly connected to the crossbar 201, and the support platform 6 is located below the first semi-circular disk 204. In use, the user places the workpiece to be clamped on the support platform 6, activates the hydraulic cylinder 301, pushes the movable seat 203 close to the fixed seat 202, and finally forms a tight clamp on the workpiece.

[0035] like Figure 1 , Figure 2 and Figure 5 As shown, both the fixed base 202 and the movable base 203 are fixedly equipped with limiting posts 7. A circular hole matching the outer diameter of the limiting post 7 is opened at the center of the first semi-circular disk 204, and the first semi-circular disk 204 is sleeved on the limiting post 7. The first semi-circular disk 204 will automatically rotate and adjust its position around the limiting post 7 according to the shape characteristics of the workpiece surface, so that the arc surface of the first semi-circular disk 204 better fits the workpiece surface, thereby achieving stable and tight clamping.

[0036] like Figure 3 As shown, the base 1 has four sets of threaded holes 8, which are evenly distributed at the four corners of the base 1. Through these threaded holes 8, the device can be used in conjunction with other devices to achieve an automated production line.

[0037] Specifically, when using the hydraulic clamping device of this CNC machine tool: ... Figure 2 As shown, the user places the workpiece to be clamped on the support table 6. The user can control the extension and retraction of the hydraulic cylinder 301 by pressing the operation button 402 on the control panel 401. Figure 2 Figure 4 and Figure 5As shown, the extension of the hydraulic cylinder 301 pushes the rectangular plate 302, thereby causing the entire movable seat 203 to slide smoothly along the crossbar 201 towards the fixed seat 202. As the movable seat 203 approaches, the first semi-circular disks 204 on the fixed seat 202 and the movable seat 203 gradually surround the workpiece. The first semi-circular disks 204 on the fixed seat 202 and the movable seat 203 clamp the workpiece from both sides. When the surface of the workpiece is not a perfectly regular circle or has local protrusions or depressions, the second semi-circular disk 205 rotatably connected to the side wall of the first semi-circular disk 204... The second semi-disc 205 will begin to rotate, and its angle will be adjusted according to the shape changes of the workpiece surface to better fit the workpiece surface. At the same time, the third semi-disc 206, which is rotatably connected to the second semi-disc 205, will also rotate, further adapting to the subtle changes in the workpiece surface. The silicone strip 5, which is bonded to the side wall of the third semi-disc 206, will come into contact with the workpiece surface. The silicone strip 5 has a certain degree of flexibility and elasticity and can deform under pressure, further filling the tiny gaps between the third semi-disc 206 and the workpiece surface, enhancing the tightness and stability of the clamping.

[0038] All technical features in this embodiment can be freely combined according to actual needs.

[0039] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. Hydraulic clamping device of a numerically controlled machine tool, comprising a base (1), characterized in that, The base (1) is provided with a clamping assembly (2) for clamping the workpiece. A hydraulic drive assembly (3) is provided on one side of the clamping assembly (2) to drive the clamping assembly (2) to achieve clamping or releasing. A control assembly (4) is provided on the base (1). The clamping assembly (2) includes a crossbar (201) bolted to the side wall of the base (1), a fixed seat (202) bolted to the inner side wall of the base (1), a movable seat (203) slidably connected to the crossbar (201), a first semi-disc (204) rotatably connected to both the fixed seat (202) and the movable seat (203), a second semi-disc (205) rotatably connected to the side wall of the first semi-disc (204), and a third semi-disc (206) rotatably connected to the second semi-disc (205).

2. A hydraulic clamping device for a numerically controlled machine tool according to claim 1, characterized in that The hydraulic drive assembly (3) includes a hydraulic cylinder (301) fixedly mounted to the side wall of the base (1). The hydraulic cylinder (301) is located above the crossbar (201). A rectangular plate (302) is bolted to one side of the movable seat (203). The end of the piston rod of the hydraulic cylinder (301) is fixedly connected to the side wall of the rectangular plate (302).

3. A hydraulic clamping device for a numerically controlled machine tool according to claim 1, characterized in that, The control component (4) includes a control board (401) fixedly mounted on the top of the base (1). Multiple sets of operation buttons (402) are fixedly provided on the control board (401), and the multiple sets of operation buttons (402) are electrically connected to the hydraulic cylinder (301).

4. A hydraulic clamping device for a numerically controlled machine tool according to claim 1, characterized in that, Two sets of circular grooves are symmetrically arranged on the sidewalls of the first semi-circular disk (204) and the second semi-circular disk (205). There are two sets of the second semi-circular disk (205), and both sets of the second semi-circular disk (205) are rotatably connected to the circular grooves on the first semi-circular disk (204). There are two sets of the third semi-circular disk (206), and both sets of the third semi-circular disk (206) are rotatably connected to the circular grooves on the second semi-circular disk (205). The sidewalls of the third semi-circular disk (206) are bonded with silicone strips (5).

5. A hydraulic clamping device for a numerically controlled machine tool according to claim 4, characterised in that, A support platform (6) is fixedly connected to the crossbar (201), and the support platform (6) is located below the first semi-circular disk (204).

6. A hydraulic clamping device for a numerically controlled machine tool according to claim 5, characterised in that, Both the fixed seat (202) and the movable seat (203) are fixedly provided with limit posts (7). A circular hole matching the outer diameter of the limit post (7) is opened at the center of the first semi-disc (204). The first semi-disc (204) is sleeved on the limit post (7).

7. A hydraulic clamping device for a numerically controlled machine tool according to claim 1, characterized in that, The base (1) has four sets of threaded holes (8), which are evenly distributed at the four corners of the base (1).

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