Workpiece clamping mechanism for numerical control machine tool

Abstract

The utility model relates to the technical field of numerical control machine tools, and discloses a workpiece clamping mechanism for a numerical control machine tool, which comprises a main body assembly, the main body assembly comprises a numerical control machine tool, a clamping base is arranged at the top of a base of the numerical control machine tool; the clamping block I is arranged at the top of the clamping base; the first groove body is formed in the top of the clamping base; the electric telescopic rod is arranged in the groove body I; the second clamping block is arranged in the first groove body, and the outer side wall of the second clamping block is fixedly connected with the left end of the electric telescopic rod; when a workpiece is round, the first clamping block can be rotated to enable the arc-shaped groove to face rightwards, then the electric telescopic rod is started to push the second clamping block to achieve clamping, when the workpiece is similar to a triangle, the first clamping block is rotated to enable the sharp-angled groove to face rightwards to achieve clamping, and the clamping assembly can clamp the small workpiece so that the machining precision and safety can be guaranteed. And workpieces with different shapes and sizes can be clamped more fixedly by adjusting different surfaces.

Description

Technical Field

[0001] The utility model relates to the technical field of numerically controlled machine tools, in particular to a workpiece clamping mechanism for numerically controlled machine tools. Background Art

[0002] CNC machine tool is the abbreviation of digital control machine tool. It is an automated machine tool equipped with a program control system. The control system can logically process programs specified by control codes or other symbolic instructions, decode them, and express them in coded numbers. The information is input into the CNC device through the information carrier. After calculation and processing, the CNC device sends out various control signals to control the movement of the machine tool and automatically process the parts according to the shape and size required by the drawing. CNC machine tools have better solved the problems of complex, precise, small batch and multi-variety parts processing. They are flexible and high-efficiency automated machine tools, representing the development direction of modern machine tool control technology. They are a typical mechatronics product. When CNC machine tools process parts, they usually need to use clamping devices to fix the workpiece.

[0003] The existing clamping generally clamps and fixes rectangular workpieces, but cylindrical workpieces are not easy to clamp and fix. For example, the patent CN217254579U discloses a CNC machine tool workpiece clamping device; including: a base, a limit plate and a clamping mechanism, the transverse section of the base is a rectangular structure, and the base plays a role of fixing and supporting the device as a whole, two limit plates are symmetrically installed on the left and right sides of the central axis of the upper end of the base, and the transverse section of the limit plate is a rectangular structure, the upper part of the limit plate is connected with a clamping mechanism, and the limit plate and the clamping mechanism are rotatably connected, and the limit plate and the clamping mechanism are fixed by bolts. In the CNC machine tool workpiece clamping device, the user can fix and clamp the rectangular workpiece through the limit plate. When the user needs to fix and clamp the tubular workpiece, the user can install the clamping mechanism on the upper end of the limit plate, and adjust the clamping mechanism to a specified position according to the model size of the workpiece, so that the user can fix and clamp workpieces of different sizes.

[0004] However, workpieces are not only rectangular and circular, but also triangular and other shapes. It is difficult to clamp and fix them with flat and arc-shaped clamping structures. For example, in the above-mentioned patent, when the user fixes and clamps a tubular workpiece, the user can install the clamping mechanism on the upper end of the limit plate, and the rotating connection is convenient for the user to adjust the clamping mechanism to an appropriate reverse direction, and fix it with bolts to ensure the stability of its fixed connection, so that the workpiece is fixed and clamped by the clamping mechanism. Because the upper clamping block and the lower clamping block are both arc-shaped, it cannot guarantee a good fixing effect for triangular workpieces or workpieces that are too small, and its use has certain limitations. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies of the prior art, the utility model provides a workpiece clamping mechanism for a CNC machine tool, which has the advantage of switching between multiple clamping surfaces and solves the problem of too few shapes of clamped workpieces.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a workpiece clamping mechanism for a CNC machine tool, comprising a main body component, the main body component comprising: a CNC machine tool, a clamping base is arranged on the top of its base; a clamping block 1 is arranged on the top of the clamping base; a groove body 1 is opened on the top of the clamping base; an electric telescopic rod is arranged in the groove body 1; a clamping block 2 is arranged in the groove body 1 and the outer side wall of the clamping block 2 is fixedly connected to the left end of the electric telescopic rod; an adjusting component is arranged on the outer side wall of the clamping block 1, and the adjusting component comprises: an arc groove, which is opened on the rear surface of the clamping block 1; a sharp angle groove, which is opened on the front surface of the clamping block 1; a limit assembly, which is arranged in the clamping base; a groove body 3, which is opened on the top of the clamping base and the bottom of the clamping block 1 is rotatably connected to the groove body 3.

[0009] Preferably, a clamping assembly is provided at the left end of the clamping block, and the clamping assembly comprises: a groove body four, which is opened at the left end of the clamping block; and a three-jaw chuck, which is provided in the groove body four.

[0010] Preferably, a plurality of steel balls are provided on the three inner side walls of the trough body.

[0011] Preferably, a fixing assembly is provided at the bottom of the clamping block 1, and the fixing assembly comprises: a groove body 5, which is opened at the bottom of the clamping base; and a fixing block, which is provided at the bottom of the clamping block 1.

[0012] Preferably, a disassembly assembly is provided at the right end of the electric telescopic rod, and the disassembly assembly includes: a groove body six, which is opened at the top of the clamping base and passes through the left and right ends; a stopper, which is provided in the groove body six and is close to the right end of the electric telescopic rod.

[0013] Preferably, the limiting assembly includes: a second groove body, which is opened at the left end of the clamping base and passes through the top; a spring, which is arranged in the second groove body; a slider, which is arranged at the top of the first spring; a slider, which is arranged in the second groove body; and four limiting grooves, which are opened at the bottom of the clamping block.

[0014] Preferably, a second spring is provided on the outer side wall of the second slider.

[0015] Preferably, the bottom portion of the limiting groove is an inclined surface.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the utility model provides a workpiece clamping mechanism for a CNC machine tool, which has the following beneficial effects:

[0018] The utility model provides a workpiece clamping mechanism for a numerically controlled machine tool, which has the advantage of switching between multiple clamping surfaces and solves the problem of too few shapes of clamped workpieces. If the workpiece to be processed is circular, the clamping block 1 can be rotated to make the arc groove turn to the right and then the electric telescopic rod can be started to push the clamping block 2 to achieve clamping. If the workpiece to be processed is similar to a triangle, the clamping block 1 can be rotated to make the sharp-angle groove turn to the right to achieve clamping. The bottom of the clamping block 1 protrudes and is located in the groove body 3, which is at the center position of the clamping block 1. After adjusting the groove to be used, the clamping block 1 can be fixed by a limit assembly. The clamping assembly can clamp smaller workpieces to ensure processing accuracy and safety. In use, the smaller workpiece can be placed in the three-jaw chuck in the groove body 4 for clamping and fixing, and then the workpiece can be processed by operating the numerically controlled machine tool. Workpieces of different shapes and sizes can be clamped in a more fixed manner by adjusting unused surfaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the top view of the clamping part in the utility model;

[0021] Figure 3 It is a front cross-sectional structural schematic diagram of the clamping part in the utility model;

[0022] Figure 4 For this utility model Figure 3 Schematic diagram of the local enlarged structure at point A in the middle.

[0023] In the figure:

[0024] 1. Main assembly; 11. CNC machine tool; 12. Clamping base; 13. Clamping block 1; 14. Tank body 1; 15. Electric telescopic rod; 16. Clamping block 2;

[0025] 2. Adjustment assembly; 21. Arc groove; 22. Sharp angle groove; 23. Limiting assembly; 231. Slot body 2; 232. Spring 1; 233. Slider 1; 234. Slider 2; 235. Limiting groove; 24. Slot body 3; 3. Clamping assembly; 31. Slot body 4; 32. Three-jaw chuck;

[0026] 4. Spring 2;

[0027] 5. Steel balls;

[0028] 6. Fixing assembly; 61. Tank body five; 62. Fixing block;

[0029] 7. Disassembly assembly; 71. Tank body six; 72. Stop block. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Embodiment 1

[0032] See also Figure 1-4 A workpiece clamping mechanism for a CNC machine tool comprises a main body component 1, wherein the main body component 1 comprises: a CNC machine tool 11, wherein a clamping base 12 is arranged on the top of the base; a clamping block 13 is arranged on the top of the clamping base 12; a trough 14 is opened on the top of the clamping base 12; an electric telescopic rod 15 is arranged in the trough 14; a clamping block 16 is arranged in the trough 14 and the outer side wall of the clamping block 16 is fixedly connected to the left end of the electric telescopic rod 15; the outer side wall of the clamping block 13 is arranged An adjustment component 2 is provided, and the adjustment component 2 includes: an arc groove 21, which is opened on the rear surface of the clamping block 13; a sharp angle groove 22, which is opened on the front surface of the clamping block 13; a limit component 23, which is arranged in the clamping base 12; a groove body 3 24, which is opened on the top of the clamping base 12 and the bottom of the clamping block 13 is rotatably connected to the groove body 3 24; a clamping component 3 is provided at the left end of the clamping block 13, and the clamping component 3 includes: a groove body 4 31, which is opened at the left end of the clamping block 13; a three-jaw chuck 3 2, arranged in the groove body four 31; the inner wall of the groove body three 24 is provided with a plurality of steel balls 5; the bottom of the clamping block 13 is provided with a fixing assembly 6, and the fixing assembly 6 includes: a groove body five 61, opened at the bottom of the clamping base 12; a fixing block 62, arranged at the bottom of the clamping block 13; a disassembly assembly 7 is arranged at the right end of the electric telescopic rod 15, and the disassembly assembly 7 includes: a groove body six 71, opened at the top of the clamping base 12 and passing through the left and right ends; a stopper 72, arranged in the groove body six 71 And close to the right end of the electric telescopic rod 15; the limiting component 23 includes: a second groove body 231, which is opened at the left end of the clamping base 12 and passes through the top; a spring 1 232, which is arranged in the second groove body 231; a slider 1 233, which is arranged at the top of the spring 1 232; a slider 234, which is arranged in the second groove body 231; a limiting groove 235, which is opened at the bottom of the clamping block 13 and has four; the outer side wall of the slider 2 234 is provided with a spring 24; the bottom part of the limiting groove 235 is an inclined surface.

[0033] CNC machine tools perform process analysis based on the drawings of the processed parts to determine the relative position of the part coordinate system on the machine coordinate system, the dimensional parameters of the relative motion between the tool and the part, the various actions required for part processing, etc., write processing programs, and transmit the information recorded in digital and character encoding methods to the CNC device through an input device or input machine. The computer in the CNC device performs a series of processing on the input information, and then sends instructions to the machine tool spindle and feed actuators through the servo system and programmable controller. The machine tool body follows these instructions and, with the cooperation of the detection and feedback device, realizes automatic control of various actions required for workpiece processing, such as the motion trajectory of the tool relative to the workpiece, the displacement and feed speed, thereby The workpiece is processed; when in use, the workpiece is placed on the clamping base 12 and is close to the right end of the clamping block 13, and the electric telescopic rod 15 is started to extend the electric telescopic rod 15 to the left, and at the same time, the clamping block 16 is driven to move to the left in the groove body 14 and apply a squeezing force to the workpiece. Since the clamping block 13 is fixed, the workpiece is clamped and fixed between the clamping block 13 and the clamping block 2 16. At this time, the workpiece is processed by operating the CNC machine tool 11. If the workpiece is circular, the clamping block 13 can be rotated to make the arc groove 21 to the right and then the electric telescopic rod 15 can be started to push the clamping block 2 16 to achieve clamping. If the workpiece is similar to a triangle, the clamping block 13 is rotated to make the sharp angle groove 22 to the right to achieve clamping. The bottom of the clamping block 13 protrudes at the groove body 3 2 4, which is in the center position of the clamping block 13. After adjusting the groove to be used, the clamping block 13 can be fixed by the limit assembly 23 to prevent the clamping block 13 from rotating and causing the workpiece to be unable to be clamped; the clamping assembly 3 set at the left end of the clamping block 13 can clamp smaller workpieces to ensure processing accuracy and safety. The smaller workpiece can be placed in the three-jaw chuck 32 in the groove body four 31 for clamping and fixing, and then the workpiece can be processed by operating the CNC machine tool 11; the multiple steel balls 5 set on the inner side wall of the groove body three 24 can reduce the friction of the clamping block 13 when it rotates in the groove body three 24, and play a protective role; the fixing assembly 6 set at the bottom of the clamping block 13 can further fix the clamping block 13, increase Safety can prevent the clamping block 13 from being separated from the slot body 3 24, and at the same time, the clamping block 13 can also be disassembled, which is convenient for later maintenance. When disassembly is required, the fixing block 62 can be taken out from the bottom of the clamping block 13 from the slot body 5 61, and the clamping block 13 can be disassembled at this time; the disassembly component 7 set at the right end of the electric telescopic rod 15 is used to disassemble the clamping block 2 16 and the electric telescopic rod 15. When the clamping block 2 16 and the electric telescopic rod 15 need to be disassembled, the stopper 72 is raised upward to separate the stopper 72 from the slot body 6 71, and the slot body 6 71 extends the slot body 14 through the right end of the clamping base 12, so at this time the clamping block 2 16 and the electric telescopic rod 15 can directly slide to the right until they are separated from the clamping base 12 to complete the disassembly, which is convenient for their later maintenance;The limit assembly 23 realizes the limit fixing operation on the clamping block 13. At the same time, the limit assembly 23 is needed to release the limit, and the clamping block 13 is rotated to select the required clamping surface to clamp and fix the workpiece. When the clamping block 13 needs to change the surface, the slider 234 can be pressed, and the slider 234 slides to the right in the groove body 231. The slider 1 233 slides downward in the groove body 231 through the inclined surface between the slider 234 and the slider 1 233. At the same time, the spring 1 232 is compressed, and the slider 234 is continued to be pressed until the slider 1 233 is out of the limit groove 235. At this time, the clamping block 13 can be rotated. When it is adjusted to the required surface, When the slider 234 is released, the spring 1 232 resets and drives the slider 1 233 to slide upwards. At the same time, the inclined surface causes the slider 234 to slide leftwards until the slider 1 233 re-enters the corresponding limiting groove 235 to fix the clamping block 13. The outer wall of the slider 234 is provided with a spring 24, which can make the slider 234 automatically reset without the help of the reset force of the spring 1 232, and at the same time, the force on the spring 1 232 is reduced to protect the spring 1 232 and extend its service life. The bottom part of the limiting groove 235 is an inclined surface, which can make the slider 1 233 enter the limiting groove 235 more easily to limit the clamping block 13.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A workpiece clamping mechanism for a numerically controlled machine tool, comprising a main body component (1), wherein the main body component (1) comprises: A numerically controlled machine tool (11) having a clamping base (12) disposed on the top of its base; A clamping block (13) is arranged on the top of the clamping base (12); A trough body (14) is provided on the top of the clamping base (12); An electric telescopic rod (15) is arranged in the first tank (14); A second clamping block (16) is disposed in the first trough body (14) and the outer wall of the second clamping block (16) is fixedly connected to the left end of the electric telescopic rod (15); The feature is that an adjustment component (2) is disposed on the outer side wall of the clamping block 1 (13), and the adjustment component (2) comprises: An arc-shaped groove (21) is formed on the rear surface of the clamping block 1 (13); A pointed groove (22) is formed on the front surface of the clamping block 1 (13); A limiting assembly (23) is arranged in the clamping base (12); The groove body three (24) is opened on the top of the clamping base (12) and the bottom of the clamping block one (13) is rotatably connected to the groove body three (24).

2. A workpiece clamping mechanism for a CNC machine tool according to claim 1, characterized in that: A clamping assembly (3) is disposed at the left end of the clamping block 1 (13), and the clamping assembly (3) comprises: A groove body 4 (31) is provided at the left end of the clamping block 1 (13); A three-jaw chuck (32) is arranged in the groove body (31).

3. A workpiece clamping mechanism for a CNC machine tool according to claim 1, characterized in that: The inner side wall of the tank body 3 (24) is provided with a plurality of steel balls (5).

4. A workpiece clamping mechanism for a CNC machine tool according to claim 1, characterized in that: A fixing assembly (6) is disposed at the bottom of the clamping block 1 (13), and the fixing assembly (6) comprises: A trough body 5 (61) is provided at the bottom of the clamping base (12); A fixing block (62) is arranged at the bottom of the clamping block 1 (13).

5. The workpiece clamping mechanism for a CNC machine tool according to claim 1, characterized in that: The right end of the electric telescopic rod (15) is provided with a disassembly assembly (7), and the disassembly assembly (7) comprises: A groove body six (71), which is opened on the top of the clamping base (12) and passes through the left and right ends; A stopper (72) is disposed in the groove body (71) and is close to the right end of the electric telescopic rod (15).

6. A workpiece clamping mechanism for a CNC machine tool according to claim 1, characterized in that: The limiting component (23) comprises: A second groove body (231) is provided at the left end of the clamping base (12) and passes through the top; Spring 1 (232), disposed in the second groove (231); Slider 1 (233), disposed on the top of spring 1 (232); A second sliding block (234) is disposed in the second groove body (231); The limiting grooves (235) are provided at the bottom of the clamping block 1 (13) and are provided in four numbers.

7. A workpiece clamping mechanism for a CNC machine tool according to claim 6, characterized in that: The outer side wall of the second slide block (234) is provided with a second spring (4).

8. A workpiece clamping mechanism for a CNC machine tool according to claim 6, characterized in that: The bottom portion of the limiting groove (235) is an inclined surface.

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