Clamp mechanism of numerical control milling machine for machining test parts

Abstract

A clamp mechanism of a numerical control milling machine for machining a test part belongs to the technical field of numerical control milling machines and comprises a clamp base and the test part, a positioning part for positioning the test part is arranged at the top end of the clamp base, and the positioning part comprises two lead screws which are arranged on the left side and the right side of the top end of the clamp base in a relatively rotating mode. The two positioning blocks can synchronously position the left side and the right side of the upper surface of the test part, compared with a traditional point-by-point positioning mode, the steps are simpler, positioning is rapid and convenient, it is guaranteed that the relative positions of the positioned positioning blocks and the upper surface of the test part are the same, and positioning is more accurate compared with the point-by-point positioning mode; in addition, the clamp can flexibly meet the positioning requirements of the test part with the flat upper surface or the test part with the upper surface different in height, the adaptability of clamp positioning is high, and the universality is wider.

Description

Technical Field

[0001] The utility model belongs to the technical field of numerical control milling machines, and in particular relates to a clamp mechanism of a numerical control milling machine for processing test components. Background Art

[0002] CNC milling machines are an automatic processing equipment developed on the basis of general milling machines. The processing technology of the two is basically the same, and the structure is somewhat similar. CNC milling machines are divided into two categories: without tool magazine and with tool magazine. Among them, CNC milling machines with tool magazine are also called machining centers. In the production process of existing cabin test parts, CNC milling machines are also needed to perform cutting and other processing on cabin test parts;

[0003] At present, before a CNC milling machine performs milling processing on a test component, it is necessary to use a fixture to position the test component on the working platform of the CNC milling machine. However, when the existing fixture positions the test component, it is necessary to operate the two positioning claws of the fixture one by one to position the two sides of the test component point by point. The above-mentioned point-by-point positioning method has complicated steps and is not simple enough. In addition, since the positioning of the two positioning claws is operated separately, it is difficult to ensure that the positioning angles of the two positioning claws relative to the test component are the same. Based on this, the present utility model is proposed. Utility Model Content

[0004] In view of the problems that the existing CNC milling machine method for point-by-point positioning of the test component is complicated and not simple enough, and because the positioning of the two positioning claws is operated separately, it is difficult to ensure that the two positioning claws have the same positioning angle relative to the test component, the utility model provides a clamp mechanism for a CNC milling machine for processing test components, which can realize the synchronous positioning of the left and right sides of the upper surface of the test component by two positioning blocks. Compared with the traditional point-by-point positioning method, the steps are simpler, the positioning is quick and convenient, and the two second bevel gears set on the left and right sides are synchronously driven by the rotating rod and the first bevel gears at both ends of the rotating rod to achieve synchronous rotation, ensuring that the relative position of the positioning block after positioning is the same as the upper surface of the test component. Compared with the point-by-point positioning method, the positioning is more accurate, and the stability of the test component after positioning is further ensured. The specific technical scheme is as follows:

[0005] A fixture mechanism for a numerically controlled milling machine for processing a test component, comprising a fixture base and a test component, wherein a positioning component for positioning the test component is disposed at the top of the fixture base, wherein the positioning component comprises two lead screws disposed at the left and right sides of the top of the fixture base for relative rotation, wherein the top of each lead screw extends upwardly out of the outer wall of the fixture base, wherein the top of each lead screw is respectively threadedly connected with a second positioning nut, a positioning claw and a first positioning nut from top to bottom, and a positioning block is installed at the bottom end of the outer wall of each positioning claw;

[0006] A self-locking cylinder is arranged in the middle of the inner cavity of the clamp base, a lifting seat is installed at the output end of the self-locking cylinder, limit seats are installed on the left and right sides of the bottom end of the inner wall of the lifting seat, rotating rods are arranged through the outer walls of the two limit seats from left to right, first bevel gears are installed on the left and right sides of the rotating rods, the two lead screws extend downward into the inner cavity of the lifting seat and are rotatably connected to the bottom end of the outer wall of the lifting seat, second bevel gears are installed on the bottom ends of the outer walls of the two lead screws, and each of the first bevel gears is meshed and connected with the outer wall of each of the second bevel gears.

[0007] In the above technical solution, a worm wheel is installed on the outer wall of the rotating rod, a worm is connected to the inner wall of the lifting seat for rotation from front to rear, and the worm extends out of the outer wall of the lifting seat to the front side, a motor is installed on the front side of the outer wall of the lifting seat, and the output end of the motor is connected to the front side of the worm.

[0008] In the above technical solution, the two lead screws are symmetrically arranged with the vertical center axis of the clamp base as the axis.

[0009] In the above technical solution, the left and right sides of the inner wall of the clamp base are respectively vertically installed with limit rods, the left and right sides of the outer wall of the lifting seat are respectively installed with sleeve blocks, and the sleeve blocks are slidably sleeved on the outer wall of the limit rods.

[0010] In the above technical solution, mounting blocks are respectively installed at the bottom ends of the side walls of the clamp base, and mounting holes are opened through the outer walls of the mounting blocks from top to bottom.

[0011] Compared with the prior art, the fixture mechanism of the CNC milling machine for processing test parts of the utility model has the following beneficial effects:

[0012] 1. Aiming at the problem that the method of CNC milling machine to position the test component point by point is complicated and not simple enough, the utility model can drive the two second bevel gears and the lead screw on the left and right sides to rotate synchronously toward the middle through the cooperation of the motor, worm gear, worm, rotating rod and the first bevel gear, so as to realize the synchronous rotation of the lead screw, positioning claw and positioning block on the left and right sides to the top of the test component, and drive the lifting seat and the top positioning claw and positioning block to move downward synchronously through the self-locking cylinder, so as to realize the synchronous positioning of the left and right sides of the upper surface of the test component by the positioning block. The utility model can realize the synchronous positioning of the left and right sides of the upper surface of the test component by two positioning blocks, which is simpler than the traditional point-by-point positioning method, and the positioning is quick and convenient;

[0013] Second, in view of the problem that the CNC milling machine performs point-by-point positioning of the test component and the positioning of the two positioning claws is performed separately, it is difficult to ensure that the two positioning claws have the same positioning angle relative to the test component. The utility model realizes the synchronous rotation of the two second bevel gears arranged on the left and right sides by synchronously driving the rotating rod and the first bevel gears at both ends of the rotating rod, so as to drive the lead screw and the positioning claws and the positioning blocks arranged on the outer wall of the lead screw to rotate at the same angle, thereby ensuring that the relative position of the positioning block after positioning is the same as the upper surface of the test component. The utility model can ensure that the two positioning blocks have the same positioning angle relative to the test component, which is more accurate than the point-by-point positioning method, and further ensures the stability of the test component after positioning.

[0014] 3. The utility model can adjust the height of the positioning claws corresponding to the outer wall of the lead screw by setting the lead screw, the second positioning nut and the first positioning nut, so that the two positioning claws on the left and right sides are located in the same horizontal plane or staggered, so as to flexibly adapt to the positioning requirements of the test parts with flat upper surfaces or test parts with uneven upper surfaces. The fixture positioning has high adaptability and wider versatility.

[0015] In summary, the utility model can realize the synchronous positioning of the left and right sides of the upper surface of the test component by two positioning blocks. Compared with the traditional point-by-point positioning method, the steps are simpler, the positioning is quick and convenient, and the two second bevel gears arranged on the left and right sides are synchronously driven by the rotating rod and the first bevel gears at both ends of the rotating rod to realize the synchronous rotation of the two second bevel gears arranged on the left and right sides, thereby ensuring that the relative position of the positioning block and the upper surface of the test component after positioning is the same. Compared with the point-by-point positioning method, the positioning is more accurate, and the stability of the test component after positioning is further ensured. In addition, the present fixture can flexibly adapt to the positioning requirements of test components with flat upper surfaces or test components with uneven upper surfaces. The fixture positioning has high adaptability and wider versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the positioning claw of the utility model;

[0017] Figure 2 This is a front cross-sectional view of the fixture base of the utility model;

[0018] Figure 3 This is a front cross-sectional view of the lifting seat of the utility model;

[0019] Figure 1-Figure 3 Among them, 1. fixture base, 2. test component, 3. self-locking cylinder, 4. lifting seat, 5. limit seat, 6. rotating rod, 7. first bevel gear, 8. worm gear, 9. worm, 10. motor, 11. screw, 12. second bevel gear, 13. first positioning nut, 14. second positioning nut, 15. positioning claw, 16. positioning block, 17. limit rod, 18. sleeve block, 19. mounting block, 20. mounting hole. DETAILED DESCRIPTION

[0020] The following is a combination of specific implementation cases and attached Figure 1-Figure 3 The present invention is further described below, but the present invention is not limited to these embodiments.

[0021] In view of the problems that the existing CNC milling machine has complicated steps for positioning the test component point by point, and is not simple enough, and because the positioning of the two positioning claws is operated separately, it is difficult to ensure that the positioning angles of the two positioning claws relative to the test component are the same, refer to Figure 1-Figure 3 As shown, a fixture mechanism of a CNC milling machine for processing a test component is proposed. The fixture mechanism is arranged on the worktable of the CNC milling machine and is suitable for CNC milling machines of commonly used models on the market. The model of the milling machine is not limited here. It includes a fixture base 1 and a test component 2. The test component 2 is positioned on the upper surface of the fixture base 1 to realize the cutting processing test of the test component 2 on the CNC milling machine. A positioning component for positioning the test component 2 is arranged on the top of the fixture base 1. The positioning component includes two lead screws 11 arranged on the left and right sides of the top of the fixture base 1 and rotating relatively. The top of each lead screw 11 extends upward from the outer wall of the fixture base 1. The top of each lead screw 11 is threadedly connected with a second positioning nut 14 and a fixing nut 15 from top to bottom. The positioning claw 15 and the first positioning nut 13, each positioning claw 15 is installed with a positioning block 16 at the bottom end of the outer wall, the first positioning nut 13 can be used to limit the installation height of the positioning claw 15, and the second positioning nut 14 can be used to prevent the positioning claw 15 from moving upward along the surface of the screw 11. Similarly, by adjusting the positions of the first positioning nut 13 and the second positioning nut 14, the position of the positioning claw 15 on the outer wall of the screw 11 can be adjusted and positioned, so that the left and right positioning claws 15 can be adjusted to the same height to adapt to the positioning requirements of the test component 2 with a regular upper surface, and the left and right positioning claws 15 can be adjusted to be staggered in height to adapt to the positioning requirements of the test component 2 with uneven upper surfaces on the left and right sides.

[0022] See also Figure 2-Figure 3As shown, a self-locking cylinder 3 is arranged in the middle of the inner cavity of the clamp base 1. The self-locking cylinder 3 is a commonly used cylinder on the market, and its output end can stay at any position of the stroke and realize self-locking. A lifting seat 4 is installed at the output end of the self-locking cylinder 3. By opening the self-locking cylinder 3, the lifting seat 4 can be driven to lift to any position and remain stable. Limit seats 5 are installed on the left and right sides of the bottom end of the inner wall of the lifting seat 4. The outer walls of the two limit seats 5 are penetrated from left to right with rotating rods 6. The first bevel gears 7 are respectively installed on the left and right sides of the rotating rod 6. Two lead screws 11 extend downward into the inner cavity of the lifting seat 4 and are rotatably connected to the bottom end of the outer wall of the lifting seat 4 through bearings. The outer walls of the two lead screws 11 A second bevel gear 12 is installed at the bottom end, and each first bevel gear 7 is meshed and connected with the outer wall of each second bevel gear 12; a worm wheel 8 is installed on the outer wall of the rotating rod 6, and a worm 9 is rotatably connected to the inner wall of the lifting seat 4 from front to rear through a bearing, and the worm 9 extends to the front side of the outer wall of the lifting seat 4, and a motor 10 is installed on the front side of the outer wall of the lifting seat 4, and the output end of the motor 10 is connected to the front side of the worm 9. The worm 9 is driven to rotate by the output end of the motor 10 to drive the worm wheel 8 and the rotating rod 6 to rotate synchronously, and the rotating rod 6 drives the first bevel gears 7 at both ends to rotate synchronously, so as to promote the synchronous rotation of the two second bevel gears 12 meshed and connected to the outer walls of the two first bevel gears 7.

[0023] In order to ensure that the second positioning nut 14, the positioning claw 15 and the first positioning nut 13 on the outer walls of the two screws 11 are symmetrical on the left and right, the two screws 11 are symmetrically arranged with the vertical center axis of the fixture base 1 as the axis, thereby ensuring that when the two positioning claws 15 are rotated inwardly by the same angle, two symmetrical points on the upper surface of the test component 2 can be synchronously positioned.

[0024] See also Figure 3 As shown, in order to ensure that the lifting seat 4 can perform stable lifting and lowering movements, limit rods 17 are vertically installed on the left and right sides of the inner wall of the clamp base 1, and sleeve blocks 18 are installed on the left and right sides of the outer wall of the lifting seat 4, and the sleeve blocks 18 are slidably sleeved on the outer walls of the limit rods 17. During the descending process of the lifting seat 4, the sleeve blocks 18 are driven to move downward along the outer walls of the limit rods 17 to ensure that the lifting seat 4 performs stable descending movements.

[0025] In addition, mounting blocks 19 are respectively installed at the bottom ends of the side walls of the fixture base 1. Mounting holes 20 are opened on the outer walls of the mounting blocks 19 from top to bottom. Bolts are passed through the mounting holes 20 and positioned on the work surface of the CNC milling machine. The mounting blocks 19 can be installed on the CNC milling machine, that is, the fixture base 1 can be connected and installed on the CNC milling machine.

[0026] The working principle of the fixture mechanism of a CNC milling machine for processing a test component in this embodiment is as follows:

[0027] The test component 2 is placed on the upper surface of the fixture base 1, and the worm 9 is driven to rotate by the output end of the motor 10 to drive the worm wheel 8 and the rotating rod 6 to rotate synchronously. The rotating rod 6 drives the first bevel gears 7 at both ends to rotate synchronously, so as to promote the two second bevel gears 12 meshed and connected with the outer walls of the two first bevel gears 7 to rotate synchronously. The two rotating second bevel gears 12 drive the positioning claws 15 and the positioning blocks 16 at the top ends of the two lead screws 11 to rotate synchronously toward the middle, so as to promote the two positioning blocks 16 on the left and right sides to correspond to the left and right ends of the upper surface of the test component 2 respectively; the lifting seat 4 is driven to move downward by the output end of the opened self-locking cylinder 3, so as to realize the synchronous downward movement of the two lead screws 11 in the inner cavity of the lifting seat 4, so as to realize the synchronous downward movement of the positioning claws 15 and the positioning blocks 16 on the outer wall of the lead screw 11, until the two positioning blocks 16 are in contact with the upper surface of the test component 2, so as to realize the synchronous positioning of the two points of the test component 2 on the upper surface of the fixture base 1, and in the process of the lifting seat 4 descending, the driving sleeve block 18 moves downward along the outer wall of the limit rod 17 to ensure the stable descending movement of the lifting seat 4;

[0028] The utility model can realize that the two positioning blocks 16 can synchronously position the left and right sides of the upper surface of the test component 2. Compared with the traditional point-by-point positioning method, the steps are simpler, the positioning is quick and convenient, and the two second bevel gears 12 set on the left and right sides are synchronously driven by the rotating rod 6 and the first bevel gears 7 at both ends of the rotating rod 6 to realize the synchronous rotation of the two second bevel gears 12 set on the left and right sides, ensuring that the relative position of the positioning blocks 16 and the upper surface of the test component 2 after positioning is the same, the positioning is more accurate than the point-by-point positioning method, and the stability of the test component 2 after positioning is further ensured. In addition, the present fixture can flexibly adapt to the positioning requirements of test components 2 with flat upper surfaces or test components 2 with uneven upper surfaces, and the fixture positioning has high adaptability and wider versatility.

[0029] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A fixture mechanism for a CNC milling machine for machining a test component, comprising a fixture base (1) and a test component (2), characterized in that: The top of the fixture base (1) is provided with a positioning component for positioning the test component (2), and the positioning component includes two lead screws (11) arranged on the left and right sides of the top of the fixture base (1) for relative rotation, the top of each lead screw (11) extending upward from the outer wall of the fixture base (1), the top of each lead screw (11) is respectively threadedly connected with a second positioning nut (14), a positioning claw (15) and a first positioning nut (13) from top to bottom, and a positioning block (16) is installed at the bottom end of the outer wall of each positioning claw (15); A self-locking cylinder (3) is arranged in the middle of the inner cavity of the clamp base (1), and a lifting seat (4) is installed at the output end of the self-locking cylinder (3). Limit seats (5) are installed on the left and right sides of the bottom end of the inner wall of the lifting seat (4). A rotating rod (6) is arranged through the outer walls of the two limit seats (5) from left to right. The first bevel gears (7) are installed on the left and right sides of the rotating rod (6). The two lead screws (11) extend downward into the inner cavity of the lifting seat (4) and are rotatably connected to the bottom end of the outer wall of the lifting seat (4). The second bevel gears (12) are installed at the bottom end of the outer wall of the two lead screws (11), and each of the first bevel gears (7) is meshed with the outer wall of each of the second bevel gears (12).

2. The fixture mechanism of a CNC milling machine for processing a test component according to claim 1, characterized in that: A worm wheel (8) is installed on the outer wall of the rotating rod (6); a worm (9) is connected to the inner wall of the lifting seat (4) so ​​as to rotate from front to rear, and the worm (9) extends out of the outer wall of the lifting seat (4) toward the front side; a motor (10) is installed on the front side of the outer wall of the lifting seat (4), and the output end of the motor (10) is connected to the front side of the worm (9).

3. The fixture mechanism of a CNC milling machine for processing a test component according to claim 2, characterized in that: The two lead screws (11) are disposed symmetrically with respect to the vertical center axis of the clamp base (1).

4. The fixture mechanism of a CNC milling machine for processing a test component according to claim 2, characterized in that: Limit rods (17) are vertically mounted on the left and right sides of the inner wall of the clamp base (1), and sleeve blocks (18) are mounted on the left and right sides of the outer wall of the lifting seat (4), and the sleeve blocks (18) are slidably mounted on the outer wall of the limit rods (17).

5. The fixture mechanism of a CNC milling machine for processing a test component according to claim 4, characterized in that: The bottom ends of the side walls of the clamp base (1) are respectively provided with mounting blocks (19), and the outer walls of the mounting blocks (19) are provided with mounting holes (20) running through from top to bottom.

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