Numerical control machine tool cutterhead positioning device and working method thereof

Abstract

The invention belongs to the technical field of machine tools, and particularly relates to a workpiece clamping device, in particular to a numerical control machine tool cutterhead positioning device and a working method thereof.The numerical control machine tool cutterhead positioning device drives a pressing assembly to rotate from the outside of a containing area to the position above the containing area through a rotating air cylinder, and the pressing assembly is driven to press downwards in the rotating process; the pressing assembly makes contact with and presses the workpiece, the pressure on the workpiece is adjusted when the thickness of the workpiece is large, and therefore when the thickness of the workpiece is large, too large pressing force on the workpiece is avoided, the defects such as pits formed in the workpiece are avoided, and the quality of the workpiece is ensured.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of machine tools, and particularly relates to a workpiece clamping device, in particular to a numerical control machine tool cutter positioning device and a working method thereof. BACKGROUND

[0002] In the production and processing of workpieces, clamping is required. In related technologies, manual operation is used for clamping. Workers press with different forces each time, which causes unstable clamping and leads to product deformation and unstable product quality. When a cylinder related clamping method is used, the stroke of the cylinder is fixed, but the size and thickness of the workpiece are different. When the cylinder presses the workpiece, it may cause excessive extrusion of the thicker workpiece, resulting in concave surface of the workpiece and unstable workpiece quality.

[0003] Therefore, due to the technical problem that excessive extrusion of the thicker workpiece may cause concave surface of the workpiece, a numerical control machine tool cutter positioning device and a working method thereof need to be designed.

[0004] It should be noted that the above information disclosed in the background section of the present application is only used to understand the background of the present application, and therefore, the above description is not considered to constitute prior art information. SUMMARY

[0005] The present application at least provides a numerical control machine tool cutter positioning device and a working method thereof.

[0006] In a first aspect, the present application provides a numerical control machine tool cutter positioning device, comprising: a base, wherein a placement area is arranged on the base, and a workpiece is placed in the placement area; a plurality of pressing mechanisms are arranged on the top surface of the base, and the pressing mechanisms are arranged at equal intervals around the placement area, and the pressing mechanisms are suitable for pressing the workpiece; the pressing mechanism comprises a rotary cylinder; the rotary cylinder is arranged on the top surface of the base; the rotary cylinder is connected with a pressing assembly; the rotary cylinder is suitable for rotating the pressing assembly from outside the placement area to above the placement area, and driving the pressing assembly to press down during the rotation, the pressing assembly contacts and presses the workpiece, and adjusts the pressure on the workpiece when the workpiece is thicker.

[0007] In an optional embodiment, the pressing assembly comprises a moving sleeve and a pressing block. The rotary cylinder is connected with an extension block, and the moving sleeve is vertically arranged in a through hole of the extension block. The pressing block is arranged in the moving sleeve and extends from the bottom of the moving sleeve; The pressing block is connected with the inner top surface of the moving sleeve by a spring.

[0008] In an alternative embodiment, a first gear rack is vertically arranged on the side wall of the pressing block, and the first gear rack is arranged close to the top of the pressing block. A second gear rack is vertically arranged in the through hole. A gear is rotatably arranged on the side wall of the moving sleeve, and the gear protrudes from the inner wall and the outer wall of the moving sleeve. The gear is engaged with the second gear rack.

[0009] In an alternative embodiment, when the rotating cylinder drives the extension block to rotate above the placement area and synchronously drives the extension block to press down, the moving sleeve is driven to rotate above the placement area and synchronously driven to press down, and the bottom of the pressing block contacts the workpiece and presses the spring upward to press the workpiece. After the rotating cylinder stops rotating, the extension block continues to be driven to press down to a preset stroke.

[0010] In an alternative embodiment, when the pressing block moves upward to press the spring, if the thickness of the workpiece is relatively thick, the upward movement of the pressing block causes the first gear rack to contact and engage with the gear, and as the pressing block continues to move upward, the first gear rack drives the gear to rotate, and the gear moves upward along the second gear rack to move the moving sleeve upward.

[0011] In an alternative embodiment, the inner wall of the moving sleeve is a rough surface, and the first gear rack contacts the inner wall of the moving sleeve.

[0012] In an alternative embodiment, the bottom surface of the pressing block is provided with an elastic layer.

[0013] In an alternative embodiment, a strip-shaped groove is vertically arranged in the inner wall of the through hole, and a limiting block is arranged on the outer wall of the moving sleeve, and the limiting block extends into the strip-shaped groove.

[0014] In an alternative embodiment, the top surface of the base is provided with a plurality of positioning blocks, the top surface of each positioning block is provided with a limiting protrusion, and the portions of the top surface of each positioning block provided with the limiting protrusions form a placement area.

[0015] In a second aspect, the embodiments of the present disclosure further provide a working method of the numerical control machine tool tool holder positioning device, comprising: The pressing assembly is driven by the rotating cylinder to rotate from outside the placement area to above the placement area, and the pressing assembly is driven to press down during the rotating process, the pressing assembly contacts and presses the workpiece, and the pressure on the workpiece is adjusted when the thickness of the workpiece is relatively thick.

[0016] The beneficial effects of this invention are that the CNC machine tool tool head positioning device drives the clamping component to rotate from outside the placement area to above the placement area through a rotary cylinder, and during the rotation, it drives the clamping component to press down, so that the clamping component contacts and clamps the workpiece, and adjusts the pressure on the workpiece when the workpiece is thick, thereby avoiding excessive clamping force on the workpiece when the workpiece is thick, avoiding the formation of defects such as dents on the workpiece, and ensuring the quality of the workpiece.

[0017] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a CNC machine tool tool head positioning device provided in an embodiment of the present disclosure; Figure 2 This is a schematic diagram of a clamping mechanism provided in an embodiment of the present disclosure; Figure 3 A cross-sectional view of a clamping assembly provided in an embodiment of this disclosure; Figure 4 This is a schematic diagram of a workpiece placement state provided in an embodiment of the present disclosure; Figure 5 This is a schematic diagram of a workpiece clamping state provided in an embodiment of this disclosure.

[0021] In the picture: 1. Base; 11. Placement area; 12. Positioning block; 13. Limiting protrusion; 2. Clamping mechanism, 21. Rotary cylinder, 22. Extension block, 221. Through hole, 222. Second rack, 223. Strip groove, 23. Clamping assembly, 231. Moving sleeve, 232. Gear, 233. Limiting block, 234. Clamping block, 235. First rack, 236. Spring; 3 workpieces; 4. Four-axis rotary table; 5. Switches. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0024] In the production and processing of workpieces, they need to be clamped. The relevant technology uses manual operation for clamping. However, the clamping force is different each time, which causes unstable clamping and product deformation, resulting in unstable product quality. When using a cylinder-related clamping method, the stroke of the cylinder is fixed. However, the workpieces have different sizes and thicknesses. When the cylinder clamps the workpiece, it will cause excessive compression on thicker workpieces, resulting in dents on the workpiece surface and unstable workpiece quality.

[0025] 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.

[0026] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0027] like Figure 1 and Figure 2As shown, at least one disclosed embodiment provides a CNC machine tool tool head positioning device, including: a base 1, on which a placement area 11 is provided, and a workpiece 3 is placed in the placement area 11; a plurality of clamping mechanisms 2 are provided on the top surface of the base 1, the clamping mechanisms 2 are arranged at equal intervals around the placement area 11, and the clamping mechanisms 2 are adapted to clamp the workpiece 3; the clamping mechanism 2 includes: a rotary cylinder 21; the rotary cylinder 21 is disposed on the top surface of the base 1; the rotary cylinder 21 is connected to a clamping assembly 23; the rotary cylinder 21 is adapted to drive the clamping assembly 23 to rotate from outside the placement area 11 to above the placement area 11, and during the rotation, it drives the clamping assembly 23 to press down, the clamping assembly 23 contacts and clamps the workpiece 3, and adjusts the pressure on the workpiece 3 when the workpiece 3 is thick, thereby avoiding excessive clamping force on the workpiece 3 when the workpiece 3 is thick, avoiding the formation of defects such as dents on the workpiece 3, and ensuring the quality of the workpiece 3.

[0028] In this embodiment, the rotary cylinder 21 can drive the pressing component 23 to press down during the rotation process, and continue to drive the pressing component 23 to press down after the rotation ends, until the stroke of the rotary cylinder 21 is completed. At this time, the pressing component 23 completes the pressing of the workpiece 3.

[0029] like Figure 4 and Figure 5 As shown, in this embodiment, when the workpiece 3 has not yet been placed in the placement area 11, the pressing component 23 is located outside the placement area 11 to avoid affecting the workpiece 3 when it is placed in the placement area 11. After the workpiece 3 is placed in the placement area 11, the rotary cylinder 21 drives the pressing component 23 to rotate above the workpiece 3 and press down to press the workpiece 3.

[0030] like Figure 3 As shown, in one optional embodiment, the clamping assembly 23 includes: a movable sleeve 231 and a clamping block 234; the rotary cylinder 21 is connected to an extension block 22, and the movable sleeve 231 is vertically inserted into a through hole 221 on the extension block 22; the clamping block 234 is disposed inside the movable sleeve 231 and extends from the bottom of the movable sleeve 231; the clamping block 234 is connected to the inner top surface of the movable sleeve 231 by a spring 236.

[0031] In one optional embodiment, a first rack 235 is vertically arranged on the side wall of the clamping block 234, and the first rack 235 is located near the top of the clamping block 234; a second rack 222 is vertically arranged inside the through hole 221; a gear 232 is rotatably arranged on the side wall of the movable sleeve 231, and the gear 232 protrudes from the inner and outer walls of the movable sleeve 231; the gear 232 meshes with the second rack 222.

[0032] In this embodiment, during the downward pressing of the extension block 22, the clamping block 234 gradually descends and contacts the pressed workpiece 3. At this time, the clamping block 234 moves relative to the moving sleeve 231 towards the inner top surface of the moving sleeve 231, compressing the spring 236. The spring force of the spring 236 maintains the clamping of the workpiece 3.

[0033] In this embodiment, when the workpiece 3 is thin, when the rotary cylinder 21 drives the extension block 22 to press down until the downward stroke of the rotary cylinder 21 ends, the thinner workpiece 3 pressing block 234 moves upward relative to the moving sleeve 231 until it does not contact the top of the first rack 235 and meshes with the gear 232. The gear 232 does not rotate, the moving sleeve 231 does not move relative to the through hole 221, and the spring 236 is compressed so that the pressing block 234 presses the workpiece 3 downward. At this time, the compression of the spring 236 is small, and the elastic force provided is small. The pressing block 234 will not damage the workpiece 3 when pressing it.

[0034] In this embodiment, when the workpiece 3 is thicker, that is, when the thickness of the workpiece 3 is greater than the initial state, the distance between the top surface of the clamping block 234 and the gear 232 is greater. At this time, during the downward pressing process of the rotary cylinder 21 driving the extension block 22, the clamping block 234 moves upward relative to the moving sleeve 231. The first rack 235 contacts the gear 232 and meshes with the gear 232. Since the workpiece 3 is thicker, the downward pressing stroke of the rotary cylinder 21 has not ended after the first rack 235 contacts the gear 232. The extension block 22 continues to move downward, and the first rack 235 drives the gear 232 to rotate. The gear 232 moves upward along the second rack 222, causing the moving sleeve 231 to move upward. Through the movement of the moving sleeve 231, the rotary cylinder 21 reduces the compression of the spring 236 at the end of the downward pressing stroke. The compressed spring 236 will not provide a large elastic force as the clamping block 234, thus avoiding the clamping block 234 from providing a large pressure to the workpiece 3 and preventing damage to the workpiece 3.

[0035] In one optional embodiment, when the rotary cylinder 21 drives the extension block 22 to rotate above the placement area 11 and presses down synchronously, it drives the movable sleeve 231 to rotate above the placement area 11 and press down synchronously. The bottom of the pressing block 234 contacts the workpiece 3 and squeezes the spring 236 upward to press the workpiece 3. After the rotary cylinder 21 stops rotating, it continues to drive the extension block 22 to press down to a preset stroke. The preset stroke is the pressing stroke of the rotary cylinder 21.

[0036] In one alternative embodiment, when the clamping block 234 moves upward to compress the spring 236, if the workpiece 3 is thick, the clamping block 234 moves upward so that the first rack 235 contacts and meshes with the gear 232. As the clamping block 234 continues to move upward, the first rack 235 drives the gear 232 to rotate, and the gear 232 moves upward along the second rack 222 so that the moving sleeve 231 moves upward.

[0037] In one optional embodiment, the inner wall of the movable sleeve 231 is rough, and the first rack 235 contacts the inner wall of the movable sleeve 231.

[0038] In this embodiment, since the inner wall of the movable sleeve 231 is rough and the first rack 235 is in contact with the inner wall of the movable sleeve 231, when the clamping ends, the rotary cylinder 21 drives the extension block 22 to move upward, and the spring 236 drives the clamping block 234 to reset. The contact between the inner wall of the movable sleeve 231 and the first rack 235 increases the friction, thus preventing the spring 236 from resetting quickly.

[0039] In this embodiment, when the spring 236 resets, it can drive the movable sleeve 231 to reset.

[0040] In one alternative embodiment, the bottom surface of the clamping block 234 is provided with an elastic layer.

[0041] In this embodiment, the elastic layer can be a plastic pad, which further prevents damage to the workpiece 3 when the clamping block 234 clamps the workpiece 3.

[0042] like Figure 3 As shown, in one optional embodiment, the inner wall of the through hole 221 is vertically provided with a strip groove 223, and the outer wall of the movable sleeve 231 is provided with a limiting block 233, which extends out of the strip groove 223.

[0043] In this embodiment, the movement of the movable sleeve 231 is limited by the cooperation between the limiting block 233 and the strip groove 223.

[0044] like Figure 1 As shown, in one optional embodiment, the top surface of the base 1 is provided with a plurality of positioning blocks 12, the top surface of the positioning blocks 12 is provided with limiting protrusions 13, and a placement area 11 is formed between the portions of the top surface of each positioning block 12 where the limiting protrusions 13 are provided.

[0045] In this embodiment, the limiting protrusion 13 can correspond to the recess on the workpiece 3, so that the workpiece 3 is positioned.

[0046] like Figure 1 As shown, in this embodiment, a switch 5 can be provided on the base 1 to control the start and stop of the rotary cylinder 21.

[0047] like Figure 1 As shown in this embodiment, the bottom of the base 1 can be connected to the four-axis rotary table 4, which can realize synchronous rotation processing during the processing, and can also solve the problem of insufficient stroke of some small machine tools, greatly improving production capacity and efficiency.

[0048] At least one other disclosed embodiment also provides a working method using the above-described CNC machine tool tool head positioning device, including: rotating the clamping component 23 from outside the placement area 11 to above the placement area 11 by rotating the cylinder 21, and during the rotation, driving the clamping component 23 to press down, the clamping component 23 contacting and clamping the workpiece 3, and adjusting the pressure on the workpiece 3 when the workpiece 3 is thick.

[0049] In summary, this CNC machine tool tool head positioning device uses a rotary cylinder 21 to drive the clamping component 23 to rotate from outside the placement area 11 to above the placement area 11. During the rotation, the clamping component 23 is driven to press down, contacting and clamping the workpiece 3. When the workpiece 3 is thick, the pressure on the workpiece 3 is adjusted, thereby avoiding excessive clamping force on the workpiece 3 when the workpiece 3 is thick, preventing defects such as dents from forming on the workpiece 3, and ensuring the quality of the workpiece 3.

[0050] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0051] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0052] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0053] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A CNC machine tool tool head positioning device, characterized in that, include: A base (1) is provided with a placement area (11) on the base (1) and a workpiece (3) is placed in the placement area (11). A plurality of pressing mechanisms (2) are provided on the top surface of the base (1). The pressing mechanisms (2) are arranged at equal intervals around the placement area (11). The pressing mechanisms (2) are suitable for pressing the workpiece (3). The clamping mechanism (2) includes: a rotary cylinder (21); The rotary cylinder (21) is disposed on the top surface of the base (1); The rotary cylinder (21) is connected to the clamping assembly (23); The rotary cylinder (21) is adapted to drive the pressing assembly (23) to rotate from outside the placement area (11) to above the placement area (11), and during the rotation, it drives the pressing assembly (23) to press down, the pressing assembly (23) contacts and presses the workpiece (3), and adjusts the pressure on the workpiece (3) when the workpiece (3) is thick.

2. The CNC machine tool tool head positioning device as described in claim 1, characterized in that, The clamping assembly (23) includes: a movable sleeve (231) and a clamping block (234); The rotary cylinder (21) is connected to an extension block (22), and the movable sleeve (231) is vertically inserted into the through hole (221) on the extension block (22); The clamping block (234) is disposed inside the movable sleeve (231) and extends from the bottom of the movable sleeve (231); The clamping block (234) is connected to the inner top surface of the movable sleeve (231) by a spring (236).

3. The CNC machine tool tool head positioning device as described in claim 2, characterized in that, A first toothed rack (235) is vertically arranged on the side wall of the clamping block (234), and the first toothed rack (235) is arranged near the top of the clamping block (234); A second toothed rack (222) is vertically arranged inside the through hole (221); A gear (232) is rotatably provided on the side wall of the movable sleeve (231), and the gear (232) protrudes from the inner and outer walls of the movable sleeve (231). The gear (232) meshes with the second rack (222).

4. The CNC machine tool tool head positioning device as described in claim 3, characterized in that, When the rotary cylinder (21) drives the extension block (22) to rotate above the placement area (11) and presses down synchronously, it drives the movable sleeve (231) to rotate above the placement area (11) and press down synchronously. The bottom of the pressing block (234) contacts the workpiece (3) and squeezes the spring (236) upward to press the workpiece (3). After the rotary cylinder (21) stops rotating, it continues to drive the extension block (22) to press down to the preset stroke.

5. The CNC machine tool tool head positioning device as described in claim 4, characterized in that, When the clamping block (234) moves upward to compress the spring (236), if the workpiece (3) is thick, the clamping block (234) moves upward so that the first rack (235) contacts and meshes with the gear (232). As the clamping block (234) continues to move upward, the first rack (235) drives the gear (232) to rotate, and the gear (232) moves upward along the second rack (222) so that the moving sleeve (231) moves upward.

6. The CNC machine tool tool head positioning device as described in claim 3, characterized in that, The inner wall of the movable sleeve (231) is rough, and the first toothed rack (235) is in contact with the inner wall of the movable sleeve (231).

7. The CNC machine tool tool head positioning device as described in claim 3, characterized in that, The bottom surface of the clamping block (234) is provided with an elastic layer.

8. The CNC machine tool tool head positioning device as described in claim 3, characterized in that, The inner wall of the through hole (221) is vertically provided with a strip groove (223), and a limit block (233) is provided on the outer wall of the movable sleeve (231), with the limit block (233) extending out of the strip groove (223).

9. The CNC machine tool tool head positioning device as described in claim 1, characterized in that, The top surface of the base (1) is provided with a plurality of positioning blocks (12), and the top surface of the positioning blocks (12) is provided with limit protrusions (13). The portion of the top surface of each positioning block (12) with limit protrusions (13) forms a placement area (11).

10. A method for operating a CNC machine tool tool turret positioning device as described in claim 1, characterized in that, include: The rotary cylinder (21) drives the pressing assembly (23) to rotate from outside the placement area (11) to above the placement area (11), and during the rotation, the pressing assembly (23) is driven to press down, the pressing assembly (23) contacts and presses the workpiece (3), and the pressure on the workpiece (3) is adjusted when the workpiece (3) is thick.

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