Accurate clamping fixture for machining center

Abstract

The utility model discloses an accurate clamping fixture for a machining center, relates to the technical field of machining equipment, and provides the following scheme aiming at the problems that the existing fixture lacks a calibration structure or mechanism, positioning deviation is easy to occur, and the deviation can cause lower position accuracy: the fixture comprises a base, a base plate is arranged above the base, and a clamping plate is arranged on the base plate; the clamping device comprises a base plate, a threaded rod is arranged on the base plate, clamping mechanisms are connected to the two ends of the base plate, an adjusting mechanism is connected to the middle of the upper portion of the base plate, a moving block is connected to the outer portion of the threaded rod, and the threaded rod rotates to drive the moving block to move. The position of the clamping mechanism can be accurately determined through indication of the fingertip ring and the dial; the electric telescopic rod drives the rotating rod to rotate to drive the sliding block and the push plate to move, the sensor detects the translation distance, and the clamping mechanism can effectively control the clamping force on a machined part in cooperation with the distance measuring instrument.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing equipment, in particular to a precision clamping fixture for a processing center. Background Art

[0002] In mechanical processing, the fixture is a device used to fix and position the workpiece. For the machining center, the accuracy and stability of the fixture have a direct impact on the machining accuracy;

[0003] Existing fixtures for machining centers can generally only perform positioning methods in a certain direction. Due to the lack of calibration structure or mechanism, positioning deviation is very likely to occur. This deviation will lead to low positioning accuracy and cannot meet some application scenarios with high precision requirements. In addition, the clamping method requires manual control of one end of the two cross-rods to move closer to each other, or the rods drive the push blocks forward for clamping. It is difficult to accurately control the clamping force, which can easily lead to uneven clamping force on the workpiece. Utility Model Content

[0004] The utility model provides a precision clamping fixture for a machining center, which solves the existing problems.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a precision clamping fixture for a machining center, comprising a base, a substrate is arranged above the base, and clamping mechanisms are connected to both ends of the substrate, the clamping mechanism is a telescopic rotating and moving structure, an adjustment mechanism is connected to the middle part above the substrate, and the adjustment mechanism comprises a threaded rod and a moving block, a moving block is connected to the outside of the threaded rod, the rotation of the threaded rod drives the moving block to move, the moving block and the clamping mechanism are in contact with each other, and the rotation of the moving block can drive the clamping mechanism to move its position.

[0006] Preferably, the base is a rectangular frame structure, a plurality of square grooves are provided inside the base, and slide grooves are provided on the upper sides of both ends of the base plate, and the inside of the slide grooves is in contact with the clamping mechanism.

[0007] Preferably, the clamping mechanism comprises a frame plate, the lower end of the frame plate slides in cooperation with the slide groove, an electric telescopic rod is provided inside the frame plate, one end of the electric telescopic rod is connected to a linkage block, and a first rotating block is provided at the upper end of the linkage block.

[0008] Preferably, a rotating rod is connected between the linkage block and the first rotating block, and the other end of the rotating rod is internally connected to the second rotating block.

[0009] Preferably, a slider is connected to the lower end of the second rotating block, a push plate is connected to one end of the slider, a rangefinder is connected above the slider near one end of the push plate, a sensor is connected to the middle part above the slider, and a push plate is connected below the slider, and the lower end of the push plate is in contact with the adjustment mechanism.

[0010] Preferably, the adjustment mechanism also includes a working plate, two square grooves are symmetrically provided in the upper middle part of the working plate, and circular holes that penetrate the entire adjustment mechanism are provided at both ends of the square grooves, a square block is connected to one side of the working plate corresponding to the circular hole, a rotating shaft is connected to one end of the threaded rod close to the square, and a rotating disk is connected to the other end of the rotating shaft.

[0011] Preferably, a dial is provided on the outside of the block, a calibration sleeve is provided on the outer end of the rotating shaft, and a thread is provided on the outer end of the calibration sleeve, and a fingertip ring is provided on one side of the outer dial of the calibration sleeve.

[0012] The beneficial effects of the utility model are as follows: the device adjusts the position of the clamping mechanism through the rotating shaft so that the threaded rod can adjust the position of the clamping mechanism through the rotating shaft and the fingertip ring, and the position of the clamping mechanism can be accurately determined through the indication of the fingertip ring and the dial; at the same time, the distance between the distance meter and the workpiece is measured through the distance meter in the clamping mechanism, and the measurement information is transmitted and displayed on the display screen above the distance meter; the position of the push plate can be conveniently and accurately adjusted to achieve accurate clamping of the workpiece; the electric telescopic rod is controlled to drive the rotating rod to rotate and drive the slider and the push plate to move the position, the translation distance is detected through the sensor, and the workpiece is clamped from both ends in cooperation with the distance meter, so that the clamping mechanism can effectively control the clamping force of the workpiece, and reduce the uneven clamping force of the clamping mechanism on the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Figure 2 It is a schematic diagram of the disassembly of the base of the utility model.

[0015] Figure 3 It is a schematic diagram of the clamping mechanism of the utility model.

[0016] Figure 4 It is a schematic diagram of the adjustment mechanism of the utility model.

[0017] Figure 5 For the utility model Figure 4 An enlarged schematic diagram of point A.

[0018] Numbers in the figure: 1, base; 2, base plate; 201, slide groove; 3, clamping mechanism; 301, shelf; 302, electric telescopic rod; 303, linkage block; 304, first rotating block; 305, rotating rod; 306, second rotating block; 307, slider; 308, push plate; 309, rangefinder; 310, sensor; 4, adjustment mechanism; 401, threaded rod; 402, moving block; 403, working plate; 404, square groove; 405, round hole; 406, square; 407, rotating shaft; 408, dial; 409, calibration sleeve; 410, fingertip ring. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Reference Figure 1-Figure 5 A precision clamping fixture for a machining center includes a base 1, a substrate 2 is arranged above the base 1, and clamping mechanisms 3 are connected to both ends of the substrate 2, the clamping mechanism 3 is a telescopic rotating and moving structure, an adjustment mechanism 4 is connected to the middle of the upper part of the substrate 2, and the adjustment mechanism 4 includes a threaded rod 401 and a moving block 402, the threaded rod 401 is externally connected to the moving block 402, the threaded rod 401 rotates to drive the moving block 402 to move, the moving block 402 and the clamping mechanism 3 are in contact with each other, and the rotation of the moving block 402 can drive the clamping mechanism 3 to move its position, the base 1 is a rectangular frame structure, a plurality of square grooves are opened inside the base 1, and slide grooves 201 are opened on the upper sides of both ends of the substrate 2, and the inside of the slide groove 201 is in contact with the clamping mechanism 3.

[0021] refer to Figure 3 The clamping mechanism 3 includes a frame plate 301, the lower end of the frame plate 301 slides with the slide groove 201, an electric telescopic rod 302 is arranged inside the frame plate 301, one end of the electric telescopic rod 302 is connected to a linkage block 303, a first rotating block 304 is arranged on the upper end of the linkage block 303, a rotating rod 305 is connected between the linkage block 303 and the first rotating block 304, and a second rotating block 306 is connected inside the other end of the rotating rod 305, a slider 307 is connected to the lower end of the second rotating block 306, one end of the slider 307 is connected to a push plate 308, and the slider 30 A rangefinder 309 is connected to one end of the push plate 308 above the slider 307, a sensor 310 is connected to the middle part of the slider 307, and a push plate 308 is connected to the slider 307 below. The lower end of the push plate 308 contacts the adjustment mechanism 4. The electric telescopic rod 302 extends to drive the linkage block 303 forward, so that the rotating rod 305 rotates to drive the slider 307 to move toward the electric telescopic rod 302. The electric telescopic rod 302 retracts to drive the linkage block 303 backward, so that the rotating rod 305 rotates to drive the slider 307 to move away from the electric telescopic rod 302.

[0022] refer to Figure 4 , Figure 5 The adjustment mechanism 4 also includes a working plate 403, and two square grooves 404 are parallel and symmetrically provided in the upper middle part of the working plate 403, and circular holes 405 that penetrate the entire adjustment mechanism 4 are provided at both ends of the square grooves 404. A block 406 is connected to one side of the working plate 403 and corresponds to the circular hole 405. A rotating shaft 407 is connected to one end of the threaded rod 401 close to the block 406, and a rotating disk is connected to the other end of the rotating shaft 407. A dial 408 is arranged on the outside of the block 406, and a calibration sleeve 409 is arranged on the outer end of the rotating shaft 407, and a thread is arranged on the outer end of the calibration sleeve 409. A fingertip ring 410 is arranged on one side of the dial 408 outside the calibration sleeve 409. The threaded rod 401 is driven to rotate by the rotating shaft 407 to move the clamping mechanism 3 to an approximate position, and the calibration sleeve 409 is rotated to clamp the fingertip ring 410. The indicated angle of the fingertip ring 410 is displayed on the dial 408 to move the clamping mechanism 3 to an accurate position.

[0023] Working principle: First, rotate the rotating shaft 407 so that the threaded rod 401 can adjust the position of the clamping mechanism 3 through the rotating shaft 407 and the fingertip ring 410, rotate the calibration sleeve 409 to clamp the fingertip ring 410, and display the indicated angle on the dial 408 through the fingertip ring 410 to move the clamping mechanism 3 to the accurate position. Then, use the rangefinder 309 in the clamping mechanism 3 to measure the distance between the rangefinder 309 and the workpiece, and transmit the measurement information to be displayed on the display screen above the rangefinder 309. Then, control the electric telescopic rod 302 so that the electric telescopic rod 302 drives the rotating rod 305 to rotate and drive the slider 307 and the push plate 308 at one end of the slider 307 to adjust the position, detect the translation distance through the sensor 310, and cooperate with the rangefinder 309 to stably clamp the workpiece from both ends.

[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A precision clamping fixture for a machining center, comprising a base (1), characterized in that: A base plate (2) is arranged above the base (1), and clamping mechanisms (3) are connected to both ends of the base plate (2); the clamping mechanism (3) is a telescopic rotational movable structure; an adjustment mechanism (4) is connected to the middle of the base plate (2); the adjustment mechanism (4) comprises a threaded rod (401) and a moving block (402); the threaded rod (401) is externally connected to the moving block (402); the threaded rod (401) rotates to drive the moving block (402) to move; the moving block (402) and the clamping mechanism (3) are in contact with each other; the rotation of the moving block (402) can drive the clamping mechanism (3) to move its position.

2. The precision clamping fixture for a machining center according to claim 1, characterized in that: The base (1) is a rectangular frame structure, a plurality of square grooves are provided inside the base (1), and sliding grooves (201) are provided on the upper sides of both ends of the base plate (2), and the interior of the sliding grooves (201) is in contact with the clamping mechanism (3).

3. The precision clamping fixture for a machining center according to claim 1, characterized in that: The clamping mechanism (3) comprises a frame plate (301), the lower end of the frame plate (301) slidingly cooperates with the slide groove (201), an electric telescopic rod (302) is provided inside the frame plate (301), one end of the electric telescopic rod (302) is connected to a linkage block (303), and a first rotating block (304) is provided at the upper end of the linkage block (303).

4. The precision clamping fixture for a machining center according to claim 3, characterized in that: A rotating rod (305) is connected between the linkage block (303) and the first rotating block (304), and a second rotating block (306) is internally connected to the other end of the rotating rod (305).

5. The precision clamping fixture for a machining center according to claim 4, characterized in that: The lower end of the second rotating block (306) is connected to a slider (307), one end of the slider (307) is connected to a push plate (308), and the upper end of the slider (307) close to the push plate (308) is connected to a distance meter (309), the upper middle part of the slider (307) is connected to a sensor (310), and the lower part of the slider (307) is connected to the push plate (308), and the lower end of the push plate (308) is in contact with the adjustment mechanism (4).

6. The precision clamping fixture for a machining center according to claim 1, characterized in that: The adjustment mechanism (4) further comprises a working plate (403), wherein two square grooves (404) are arranged in parallel and symmetrically in the middle of the upper part of the working plate (403), and circular holes (405) penetrating the entire adjustment mechanism (4) are arranged at both ends of the square grooves (404); a square block (406) corresponding to the circular hole (405) is connected to one side of the working plate (403); a rotating shaft (407) is connected to one end of the threaded rod (401) close to the square block (406), and a rotating disk is connected to the other end of the rotating shaft (407).

7. The precision clamping fixture for a machining center according to claim 6, characterized in that: A scale plate (408) is arranged outside the block (406), a calibration sleeve (409) is arranged at the outer end of the rotating shaft (407), and a thread is arranged at the outer end of the calibration sleeve (409), and a fingertip ring (410) is arranged on one side of the scale plate (408) outside the calibration sleeve (409).

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