Clamping tool for operating table of numerical control machine tool

Abstract

The utility model relates to the technical field of numerical control machine tool machining, and provides a numerical control machine tool operating table clamping tool which comprises an installation shell, the installation shell comprises a shell body, a sliding groove is formed in the top face of the shell body, and a fixing mechanism used for clamping a workpiece is arranged in the shell body. And two self-locking mechanisms for limiting the fixing mechanism are arranged on the fixing mechanism. According to the clamping tool for the operating table of the numerical control machine tool, the two lead screw sliding blocks and the clamping plate can be driven to move oppositely at the same time through rotation of the bidirectional lead screw, then centering positioning of a workpiece is completed, the fixing ring and the limiting teeth can be limited through matched arrangement of the sliding rods and the trapezoidal blocks, and under limiting of the fixing ring and the limiting teeth, the workpiece can be clamped. The bidirectional lead screw can only rotate in the single direction, namely the bidirectional lead screw can only drive the lead screw sliding block and the clamping plate to fix the workpiece, and the situation that the workpiece is loosened due to vibration generated in the workpiece machining process of the numerical control machine tool is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control machine tool processing, in particular to a clamping tool for a numerical control machine tool operating table. Background Art

[0002] CNC machine tools are an indispensable and important equipment in modern manufacturing. They improve processing accuracy, production efficiency and product quality through automated and digital processing methods. As an important component of CNC machine tools, the T-type worktable has excellent rigidity, versatility and flexibility, and can meet various processing needs. When processing the workpiece, a fixture is often required to fix the workpiece in conjunction with the T-type worktable.

[0003] A positioning fixture for a CNC machine tool disclosed in Chinese patent application publication specification CN216706775 U facilitates users to adjust the distance between two positioning frames according to processing requirements through a vertical plate, a threaded sleeve, a screw, a positioning frame, a spring, a first positioning plate, a sponge pad, an adjusting rod and a second positioning plate, thereby facilitating the limiting of a workpiece and also facilitating the clamping and positioning of the workpiece according to the size of the workpiece.

[0004] In actual applications, it is found that the device needs to rotate the two screws in and out of the threaded sleeve respectively, so that the two positioning frames and the positioning plate move toward each other to realize the positioning and disassembly of the workpiece, which is not convenient for centering the workpiece. At the same time, the vibration generated during the processing of the workpiece by the CNC machine tool will cause the screw to loosen, resulting in reduced processing accuracy of the workpiece. Judging from the technical solution and function of the positioning fixture for the above-mentioned CNC machine tools, the centering positioning effect and stability of the workpiece clamping need to be improved. For this reason, we provide a CNC machine tool operating table clamping fixture. Utility Model Content

[0005] The utility model provides a clamping tool for a numerical control machine tool operating table, so as to improve the centering positioning effect and the self-locking effect of clamping a workpiece.

[0006] The technical solution of the utility model is as follows:

[0007] The utility model is realized by the following technical scheme: a clamping tool for a CNC machine tool operating table comprises a mounting shell, the mounting shell comprises a shell body, a slide groove is provided on the top surface of the shell body, a fixing mechanism for clamping a workpiece is arranged inside the shell body, two self-locking mechanisms for limiting the fixing mechanism are arranged on the fixing mechanism, and a guide assembly is arranged on the fixing mechanism;

[0008] The fixing mechanism comprises a bidirectional screw rod rotatably connected to the inner side wall of the housing through a bearing, the surface thread of the bidirectional screw rod is matched with two screw rod sliders, and the top surfaces of the two screw rod sliders are fixed with clamping plates that are in sliding contact with the housing through a sliding groove;

[0009] The self-locking mechanism includes a fixing ring fixed to one end of the bidirectional screw rod, the side of the fixing ring is fixed with evenly distributed limiting teeth, the inner wall of the shell is fixed with a slip ring, a sliding rod penetrating the shell is slidably connected inside the slip ring, a trapezoidal block in contact with the limiting teeth is fixed to one end of the sliding rod close to the fixing ring, and a compression spring sleeved on the side of the sliding rod is arranged on the side of the sliding ring close to the shell.

[0010] Preferably, both ends of the bidirectional screw rod pass through the housing, and both ends of the bidirectional screw rod are fixed with rotating rods. The rotating rod is provided to facilitate the rotation of the bidirectional screw rod and provide a reasonable force point for rotating the bidirectional screw rod.

[0011] Preferably, a stopper is fixed to one end of the slide bar extending to the outside of the shell, and the diameter of the stopper is greater than the diameter of the slide bar. The stopper can limit the slide bar.

[0012] Preferably, a pull ring is fixed to a side of the stopper away from the slide rod, and a hole is formed on the pull ring. The pull ring is provided to facilitate pulling the stopper.

[0013] Preferably, two first limit blocks are fixed on the front side of the shell, and the side surfaces of the two first limit blocks close to each other are each provided with a first limit groove that is in sliding contact with both ends of the block. The first limit groove and the first limit block can limit the block and the sliding rod.

[0014] Preferably, two second limit blocks are fixed on the front side of the shell, and the side surfaces of the two second limit blocks close to each other are each provided with a second limit groove adapted to the two ends of the block, and the second limit block and the second limit groove can limit the block and the slide rod.

[0015] Preferably, the guide assembly comprises a guide rod fixed to the inner wall of the shell, and two guide blocks respectively fixed to the bottom surfaces of the two clamps are slidably connected to the guide rod. The guide rod and the guide blocks are provided to guide the clamps.

[0016] Preferably, two fixing blocks are fixed on the left and right sides of the shell, a first mounting groove is provided on the fixing block, a second mounting groove is provided on the first mounting groove, a diameter of the second mounting groove is greater than a diameter of the first mounting groove, the bottom of the shell is open, and a plurality of fixing plates are fixed to the bottom surface of the shell, and the device can be conveniently installed on the T-shaped workbench of the CNC machine tool through the matching arrangement among the fixing block, the first mounting groove, the second mounting groove and the fixing plate.

[0017] The working principle and beneficial effects of the utility model are:

[0018] 1. The CNC machine tool operating table clamping fixture can drive the two screw sliders and the clamping plate to move toward each other at the same time through the rotation of the bidirectional screw, thereby completing the centering of the workpiece. The fixed ring and the limit tooth can be limited by the coordinated setting of the slide bar and the trapezoidal block. Under the limitation of the fixed ring and the limit tooth, the bidirectional screw can only rotate in one direction, that is, the bidirectional screw can only drive the screw slider and the clamping plate to fix the workpiece, which effectively avoids the vibration generated during the processing of the workpiece by the CNC machine tool, resulting in the loosening of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0021] Figure 2 This is a cross-sectional view of the internal structure of the shell in the utility model;

[0022] Figure 3 For this utility model Figure 1 A schematic diagram of the structure enlargement in the middle;

[0023] Figure 4 For this utility model Figure 2 Enlarged schematic diagram of the structure at point B in the middle.

[0024] In the figure:

[0025] 1. Mounting shell; 101. Housing; 102. Fixing block; 103. Sliding groove; 104. First mounting groove; 105. Second mounting groove; 106. Fixing plate;

[0026] 2. Fixing mechanism; 201. Bidirectional screw rod; 202. Screw rod slider; 203. Clamp; 204. Rotating rod;

[0027] 3. Self-locking mechanism; 301. Fixed ring; 302. Limiting teeth; 303. Sliding ring; 304. Sliding rod; 305. Trapezoidal block; 306. Compression spring; 307. Stopper; 308. Pull ring; 309. First limiting block; 310. First limiting groove; 311. Second limiting block; 312. Second limiting groove;

[0028] 4. Guide assembly; 401. Guide rod; 402. Guide block. DETAILED DESCRIPTION

[0029] The following will be combined with 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 of 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.

[0030] Example 1

[0031] like Figure 1~Figure 4 As shown, this embodiment proposes a clamping tool for a CNC machine tool operating table, including a mounting shell 1, the mounting shell 1 includes a shell body 101, a slide groove 103 is opened on the top surface of the shell body 101, and a fixing mechanism 2 for clamping a workpiece is arranged inside the shell body 101, the fixing mechanism 2 includes a bidirectional screw rod 201 rotatably connected to the inner wall of the shell body 101 through a bearing, the surface thread of the bidirectional screw rod 201 is equipped with two screw rod sliders 202, the top surfaces of the two screw rod sliders 202 are fixed with clamping plates 203 that are in sliding contact with the shell body 101 through the slide groove 103, both ends of the bidirectional screw rod 201 pass through the shell body 101, and both ends of the bidirectional screw rod 201 are fixed with rotating rods 204.

[0032] The clamping plate 203 is limited by the guide rod 401 and the guide block 402, and the screw slider 202 is limited by the slide groove 103. Therefore, the rotation of the bidirectional screw 201 will drive the two screw sliders 202 to move closer to each other, and the two screw sliders 202 approaching each other will also drive the two clamping plates 203 to move closer to each other, thereby completing the center positioning of the workpiece for subsequent processing of the workpiece.

[0033] Please refer to Figure 2 A guide assembly 4 is provided on the fixing mechanism 2, and the guide assembly 4 includes a guide rod 401 fixed to the inner wall of the shell 101, and two guide blocks 402 respectively fixed to the bottom surfaces of the two clamps 203 are slidably connected to the guide rod 401. When the clamps 203 move, they will also drive the guide blocks 402 to slide on the guide rod 401. Through the cooperation of the guide rod 401 and the guide blocks 402, the clamps 203 can be supported and guided.

[0034] Please refer to Figure 3 and Figure 4Two self-locking mechanisms 3 for limiting the fixing mechanism 2 are provided on the fixing mechanism 2. The self-locking mechanism 3 includes a fixing ring 301 fixed to one end of the bidirectional screw rod 201, and evenly distributed limiting teeth 302 are fixed to the side of the fixing ring 301. A slip ring 303 is fixed to the inner wall of the shell 101. A sliding rod 304 that penetrates the shell 101 is slidably connected in the slip ring 303. A trapezoidal block 305 that contacts the limiting teeth 302 is fixed to one end of the sliding rod 304 close to the fixing ring 301, and a compression spring 306 that is sleeved on the side of the sliding rod 304 is provided on the side of the slip ring 303 close to the shell 101.

[0035] The rotation of the bidirectional screw rod 201 will also drive the fixed ring 301 and the limiting tooth 302 fixed on the fixed ring 301 to rotate. The rotating limiting tooth 302 will squeeze the trapezoidal block 305, so that the trapezoidal block 305 drives the sliding rod 304 to slide on the sliding ring 303, and the sliding rod 304 will squeeze the compression spring 306. When the limiting tooth 302 no longer resists the trapezoidal block 305, under the action of the elastic force generated by the deformation of the compression spring 306, the sliding rod 304 and the trapezoidal block 305 will be reset. At this time, due to the limitation of the sliding rod 304 and the trapezoidal block 305, the limiting tooth 302 and the fixed ring 301 cannot rotate in the opposite direction, thereby realizing the limitation of the bidirectional screw rod 201.

[0036] Please refer to Figure 3 and Figure 4 A stopper 307 is fixed to one end of the slide bar 304 extending to the outside of the shell 101, and the diameter of the stopper 307 is greater than the diameter of the slide bar 304. A pull ring 308 is fixed to the side of the stopper 307 away from the slide bar 304, and a hole is provided on the pull ring 308. Two first limit blocks 309 are fixed to the front of the shell 101, and the sides of the two first limit blocks 309 close to each other are each provided with a first limit groove 310 that is in sliding contact with the two ends of the stopper 307. Two second limit blocks 311 are fixed to the front of the shell 101, and the sides of the two second limit blocks 311 close to each other are each provided with a second limit groove 312 that is compatible with the two ends of the stopper 307.

[0037] The first limit block 309 and the first limit groove 310 limit the stop block 307, so that the sliding rod 304 and the trapezoidal block 305 can be prevented from rotating, so that the trapezoidal block 305 can be adapted to the limit tooth 302, and the depth value of the second limit groove 312 is less than the depth value of the first limit groove 310. By pulling the rotating pull ring 308, the stop block 307 can be driven to be stuck in the second limit groove 312. At this time, the trapezoidal block 305 and the limit tooth 302 are not in contact, and the bidirectional screw rod 201 can be reversed to disassemble the workpiece.

[0038] In this embodiment, the bidirectional screw rod 201 can be rotated by the rotating rod 204. The rotation of the bidirectional screw rod 201 will simultaneously drive the two clamps 203 respectively limited by the guide rods 401 and the guide blocks 402, and the screw slider 202 threadedly matched with the bidirectional screw rod 201 to move closer to each other. The two clamps 203 close to each other are used to complete the centering of the workpiece. At the same time, the matching arrangement of the slide rod 304, the trapezoidal block 305 and the compression spring 306 can limit the fixing ring 301 and the limiting tooth 302, so that the fixing ring 301, the limiting tooth 302 and the bidirectional screw rod 201 can only rotate in one direction, realizing self-locking, and effectively avoiding the vibration generated during the processing of the workpiece by the CNC machine tool, which causes the workpiece to loosen.

[0039] Example 2

[0040] like Figure 1-2 As shown, based on the same concept as the above embodiment 1, this embodiment further proposes:

[0041] Two fixing blocks 102 are fixed on the left and right sides of the shell 101, a first mounting groove 104 is opened on the fixing block 102, a second mounting groove 105 is opened on the first mounting groove 104, the diameter of the second mounting groove 105 is greater than the diameter of the first mounting groove 104, the bottom of the shell 101 is open, and a plurality of fixing plates 106 are fixed to the bottom surface of the shell 101.

[0042] In this embodiment, the diameter value of the second mounting groove 105 is greater than the diameter value of the first mounting groove 104, so that the shell 101 can be installed on the T-shaped workbench through bolts and T-blocks in conjunction with the fixing block 102. The bottom of the shell 101 is open to discharge the waste slag generated by machining the workpiece with the CNC machine tool. The structural strength of the shell 101 can be increased by the fixing plate 106.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The clamping tool for the CNC machine tool operating table is characterized by: The mounting shell (1) comprises a housing (101), wherein the housing (101) has a top surface provided with a slide groove (103), wherein a fixing mechanism (2) for clamping a workpiece is arranged inside the housing (101), wherein the fixing mechanism (2) is provided with two self-locking mechanisms (3) for limiting the position of the fixing mechanism (2), and wherein the fixing mechanism (2) is provided with a guide assembly (4); The fixing mechanism (2) comprises a bidirectional screw (201) rotatably connected to the inner wall of the housing (101) via a bearing, the surface of the bidirectional screw (201) being threadedly engaged with two screw sliders (202), and the top surfaces of the two screw sliders (202) are both fixed with a clamping plate (203) that is in sliding contact with the housing (101) via a sliding groove (103); The self-locking mechanism (3) comprises a fixing ring (301) fixed to one end of a bidirectional screw rod (201), the side of the fixing ring (301) being fixed with evenly distributed limiting teeth (302), the inner wall of the housing (101) being fixed with a slip ring (303), the inside of the slip ring (303) being slidably connected with a sliding rod (304) penetrating the housing (101), the end of the sliding rod (304) close to the fixing ring (301) being fixed with a trapezoidal block (305) in contact with the limiting teeth (302), and the side of the slip ring (303) close to the housing (101) being provided with a compression spring (306) sleeved on the side of the sliding rod (304).

2. The CNC machine tool operating table clamping fixture according to claim 1 is characterized in that: Both ends of the bidirectional screw rod (201) pass through the housing (101), and both ends of the bidirectional screw rod (201) are fixed with rotating rods (204).

3. The CNC machine tool operating table clamping fixture according to claim 1 is characterized in that: A stopper (307) is fixed to one end of the slide bar (304) extending to the outside of the housing (101), and the diameter of the stopper (307) is greater than the diameter of the slide bar (304).

4. The CNC machine tool operating table clamping fixture according to claim 3 is characterized in that: A pull ring (308) is fixed to a side of the stopper (307) away from the slide rod (304), and a hole is formed on the pull ring (308).

5. The CNC machine tool operating table clamping fixture according to claim 1, characterized in that: Two first limit blocks (309) are fixed on the front side of the housing (101), and first limit grooves (310) that are in sliding contact with two ends of the stop block (307) are provided on the side surfaces of the two first limit blocks (309) that are close to each other.

6. The CNC machine tool operating table clamping fixture according to claim 1, characterized in that: Two second limit blocks (311) are fixed on the front side of the housing (101), and second limit grooves (312) adapted to the two ends of the stop block (307) are provided on the side surfaces of the two second limit blocks (311) close to each other.

7. The CNC machine tool operating table clamping fixture according to claim 1, characterized in that: The guide assembly (4) comprises a guide rod (401) fixed to the inner wall of the housing (101), and two guide blocks (402) respectively fixed to the bottom surfaces of two clamping plates (203) are slidably connected to the guide rod (401).

8. The CNC machine tool operating table clamping fixture according to claim 1, characterized in that: Two fixing blocks (102) are fixed on both left and right sides of the shell (101); a first mounting groove (104) is provided on the fixing block (102); a second mounting groove (105) is provided on the first mounting groove (104); a diameter of the second mounting groove (105) is greater than a diameter of the first mounting groove (104); the bottom of the shell (101) is open; and a plurality of fixing plates (106) are fixed to the bottom surface of the shell (101).

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