Workpiece positioning tool for numerical control milling machine

Abstract

The utility model belongs to numerical control milling machine technical field, concretely relates to a workpiece positioning frock for numerical control milling machine, including support platform, four even distribution's support foot are fixedly connected with the lower end of support platform, the upper end of support platform is contacted with three jaw chuck, the inside clamping of three jaw chuck has rotor shaft, the inside wall of three jaw chuck is fixedly connected with fixed base, the inner wall sliding of fixed base is connected with the guide plate, the end surface fixed connection of guide plate near rotor shaft one side has the clamping plate, the clamping plate is connected with the sliding of support platform. The utility model discloses through the action of motor, screw rod, guide rod etc. structure, can drive three jaw chuck to move, and then carries out adaptive adjustment processing to the position of three jaw chuck, under the action of round hole, round bar etc. structure, can carry out the rotary position of screw rod, and then carries out the positioning use to the position of three jaw chuck.

Description

Technical Field

[0001] This utility model relates to the field of CNC milling machine technology, specifically to a workpiece positioning fixture for a CNC milling machine. Background Technology

[0002] As is well known, CNC milling machines are automated machining equipment based on computer numerical control technology and are widely used in the field of machinery manufacturing. The workpiece positioning fixtures of CNC milling machines directly determine the machining accuracy, efficiency, and safety, with the most common being machine-made vises and three-jaw chucks.

[0003] The utility model patent with patent authorization announcement number CN216326618U discloses a clamping device for a wind-powered oil injection ring for a CNC milling machine. It includes a three-jaw chuck set on the worktable and a connecting member. The connecting member is connected to the chuck body of the three-jaw chuck. A fixing member is slidably provided on the worktable. The fixing member is fixed to the worktable by a locking member. The fixing member is connected to the connecting member.

[0004] However, existing workpiece positioning fixtures for CNC milling machines also have certain defects. Although existing workpiece positioning fixtures for CNC milling machines mostly use a combination of motors, screws and other structures to complete the movement of the three-jaw chuck, the movement accuracy of the three-jaw chuck is easily weakened due to the influence of external forces such as movement inertia. Utility Model Content

[0005] The purpose of this utility model is to provide a workpiece positioning fixture for CNC milling machines, which solves the problem that although existing workpiece positioning fixtures for CNC milling machines mostly use the cooperation of motors, screws and other structures to complete the movement of the three-jaw chuck, the movement accuracy of the three-jaw chuck is easily weakened due to the influence of external forces such as movement inertia.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a workpiece positioning fixture for a CNC milling machine, comprising a support platform, four evenly distributed support feet fixedly connected to the lower end of the support platform, a three-jaw chuck contacting the upper end of the support platform, a rotor shaft clamped inside the three-jaw chuck, a moving mechanism jointly provided on the three-jaw chuck and the support platform, a fixed seat fixedly connected to the inner side wall of the three-jaw chuck, a guide plate slidably connected to the inner wall of the fixed seat, a clamping plate fixedly connected to the end face of the guide plate near the rotor shaft, the clamping plate slidably connected to the support platform, the clamping plate contacting the rotor shaft, an elastic element fixedly connected to the surface of the clamping plate, and the other end of the elastic element fixedly connected to the fixed seat.

[0007] Preferably, four fixing seats are provided, and the four fixing seats are arranged in a circular array on the three-jaw chuck. The fixing seats can be used for the subsequent installation of structural components such as guide plates and clamping plates.

[0008] Preferably, the inner sidewall of the card plate is provided with multiple contact grooves, which are evenly distributed on the card plate. The contact grooves can improve the friction effect on the surface of the card plate.

[0009] Preferably, the moving mechanism includes fixed ears, and fixed ears are fixedly connected to both the left and right ends of the support platform. A guide rod is fixedly connected between the two fixed ears. A guide block is slidably sleeved on the outer side of the guide rod. The guide block is slidably connected to the support platform and fixedly connected to a three-jaw chuck. A motor is fixedly installed at the left end of the support platform. A screw is fixedly connected to the output shaft of the motor. A slider is threadedly connected to the outer side of the screw. The slider is slidably connected to the support platform and fixedly connected to the three-jaw chuck. A fixed plate is fixedly connected to the right end of the support platform. The screw is rotatably connected to the fixed plate. A rotating disk is fixedly connected to the right end of the screw. A round hole is opened at the left end of the rotating disk. A fixed block is fixedly connected to the right end of the fixed plate. A movable frame is slidably connected to the inner wall of the fixed block. A round rod is fixedly connected to the inner wall of the vertical part of the movable frame. The round rod is slidably connected to the round hole. Through the cooperation of the motor, screw, guide rod and other structures, the three-jaw chuck can be driven to move, improving the adaptability of the positioning fixture. Under the action of the round hole, round rod and other structures, the screw can be rotated and limited, thereby positioning the three-jaw chuck.

[0010] Preferably, a limiting disc one is fixedly sleeved on the outer side of the screw, and the limiting disc one is rotatably connected to the fixing plate. A limiting disc two is fixedly sleeved on the outer side of the screw, and the limiting disc two is rotatably connected to the fixing plate. Through the function of the limiting disc one, the limiting disc two and other structures, the screw can be rotated and limited.

[0011] Preferably, multiple circular holes are provided, and the multiple circular holes are arranged in a circular array on the rotating disk. The circular holes facilitate the use of the circular rod for locking.

[0012] Preferably, an elastic body is fixedly connected to the left end of the round rod, and the other end of the elastic body is fixedly connected to the fixing plate. The round rod can be connected and used by means of the elastic body.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model can pre-position the rotor shaft through the function of the clamping plate, elastic element and other structures. Under the action of the contact groove, the clamping stability of the clamping plate can be improved, which facilitates the subsequent clamping and fixing of the rotor shaft by the three-jaw chuck and makes it convenient for operators to use.

[0014] 2. This utility model uses a motor, screw, guide rod and other structures to drive the three-jaw chuck to move, thereby making adaptive adjustments to the position of the three-jaw chuck. Under the action of the round hole, round rod and other structures, the screw can be rotated and limited, thereby positioning the three-jaw chuck for use. Attached Figure Description

[0015] Figure 1 This is a three-dimensional view of the overall structure of this utility model; Figure 2 For the present utility model Figure 1 Side view; Figure 3 For the present utility model Figure 1 Top view; Figure 4 For the present utility model Figure 3 Enlarged view of point A; Figure 5 For the present utility model Figure 3 Enlarged view of the rotating disk.

[0016] In the diagram: 1. Support platform; 2. Support foot; 3. Three-jaw chuck; 4. Rotor shaft; 5. Moving mechanism; 6. Fixed seat; 7. Guide plate; 8. Clamping plate; 9. Contact groove; 10. Elastic element; 50. Fixed ear; 51. Guide rod; 52. Guide block; 53. Motor; 54. Screw; 55. Slider; 56. Fixed plate; 57. Limiting plate one; 58. Limiting plate two; 59. Rotating disk; 590. Round hole; 591. Fixed block; 592. Moving frame; 593. Round rod; 594. Elastic body. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5A workpiece positioning fixture for a CNC milling machine includes a support table 1. The lower end of the support table 1 is fixedly connected to four evenly distributed support feet 2. The upper end of the support table 1 contacts a three-jaw chuck 3. A rotor shaft 4 is clamped inside the three-jaw chuck 3. A fixed seat 6 is fixedly connected to the inner side wall of the three-jaw chuck 3. A guide plate 7 is slidably connected to the inner wall of the fixed seat 6. A clamping plate 8 is fixedly connected to the end face of the guide plate 7 near the rotor shaft 4. The clamping plate 8 is slidably connected to the support table 1 and contacts the rotor shaft 4. An elastic element 10 is fixedly connected to the surface of the clamping plate 8. The other end of the elastic element 10 is fixedly connected to the fixed seat 6.

[0019] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 There are four fixed seats 6, which are arranged in a ring array on the three-jaw chuck 3. The fixed seats 6 can be used for the installation of subsequent structural components such as guide plates 7 and chuck plates 8. Multiple contact grooves 9 are opened on the inner side wall of the chuck plate 8. The multiple contact grooves 9 are evenly distributed on the chuck plate 8. The contact grooves 9 can improve the friction effect on the surface of the chuck plate 8.

[0020] Please see Figure 1 , Figure 2 , Figure 3 , Figure 5 A moving mechanism 5 is jointly provided on the three-jaw chuck 3 and the support platform 1. The moving mechanism 5 includes fixed ears 50. Fixed ears 50 are fixedly connected to both the left and right ends of the support platform 1. A guide rod 51 is fixedly connected between the two fixed ears 50. A guide block 52 is slidably sleeved on the outer side of the guide rod 51. The guide block 52 is slidably connected to the support platform 1 and fixedly connected to the three-jaw chuck 3. A motor 53 is fixedly installed on the left end of the support platform 1. A screw 54 is fixedly connected to the output shaft of the motor 53. A slider 55 is threadedly connected to the outer side of the screw 54. The slider 55 is slidably connected to the support platform 1 and fixedly connected to the three-jaw chuck 3. A fixed plate 56 is fixedly connected to the right end of the support platform 1. The screw 54 is rotatably connected to the fixed plate 56. A rotating disk 59 is fixedly connected to the right end of the screw 54. A round hole 590 is opened at the left end of the rotating disk 59. A fixed block 591 is fixedly connected to the right end of the fixed plate 56. A movable frame 592 is slidably connected to the inner wall of the fixed block 591. A round rod 593 is fixedly connected to the inner wall of the vertical part of the movable frame 592. The round rod 593 is slidably connected to the round hole 590. Through the cooperation of the motor 53, screw 54, guide rod 51 and other structures, the three-jaw chuck 3 can be driven to move, improving the adaptability of the positioning fixture. Under the action of the round hole 590, round rod 593 and other structures, the screw 54 can be rotated and limited, thereby positioning the three-jaw chuck 3.

[0021] Please see Figure 1 , Figure 2 , Figure 3 , Figure 5 The outer side of the screw 54 is fixedly sleeved with a limiting disk 57, which is rotatably connected to the fixing plate 56. The outer side of the screw 54 is fixedly sleeved with a limiting disk 58, which is rotatably connected to the fixing plate 56. Through the function of the limiting disk 57, the limiting disk 58 and other structures, the screw 54 can be rotated and limited.

[0022] Please see Figure 1 , Figure 2 , Figure 3 , Figure 5 Multiple circular holes 590 are provided, and the multiple circular holes 590 are arranged in a ring array on the rotating disk 59. The circular holes 590 are provided to facilitate the use of the circular rod 593 for snapping. An elastic body 594 is fixedly connected to the left end of the circular rod 593, and the other end of the elastic body 594 is fixedly connected to the fixing plate 56. The circular rod 593 can be connected and used through the setting of the elastic body 594.

[0023] The specific implementation process of this utility model is as follows: In use, by pushing the rotor shaft 4 into the inner wall of the three-jaw chuck 3, the clamping plate 8 slides along the surface of the rotor shaft 4, and the guide plate 7 moves under the pressure, causing the guide plate 7 to slide along the inner wall of the fixed seat 6. The elastic element 10 deforms, and under the action of the deformation force of the elastic element 10, the clamping plate 8 can be pushed to fit tightly with the rotor shaft 4, so as to quickly position the rotor shaft 4 and achieve a good pre-positioning effect, which facilitates the subsequent clamping and fixing of the rotor shaft 4 by the three-jaw chuck 3. The output shaft is driven to rotate by the motor 53, which in turn drives the screw 54 to rotate. Under the threaded connection, the slider 55 can be driven to move, which in turn drives the three-jaw chuck 3 to move, so that the guide block 52 slides along the surface of the guide rod 51 to ensure that the three-jaw chuck 3 is in a stable moving state, and the position of the three-jaw chuck 3 can be adaptively adjusted. When the screw 54 rotates, it drives the first limiting plate 57 and the second limiting plate 58 to rotate along the surface of the fixed plate 56 to ensure the stability of the screw 54's rotation. When the screw 54 rotates, it drives the rotating disk 59 to rotate. Under the pressure of the inner wall of the circular hole 590, it pushes the circular rod 593 to move, thereby driving the moving frame 592 to slide along the inner wall of the fixed block 591. The elastic body 594 deforms, eventually causing the circular rod 593 to disengage from the circular hole 590. Under the action of force, the circular rod 593 can slide along the surface of the rotating disk 59. When the circular rod 593 slides into the next circular hole 590, the elastic body 594 restores its deformation, thereby pushing the circular rod 593 to be inserted into the next circular hole 590, limiting the rotating disk 59, and thus limiting the screw 54, avoiding unnecessary movement of the three-jaw chuck 3.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A workpiece positioning tool for a numerical control milling machine, comprising a support table (1), characterized in that: The lower end of the support platform (1) is fixedly connected to four evenly distributed support feet (2). The upper end of the support platform (1) is in contact with a three-jaw chuck (3). The rotor shaft (4) is clamped inside the three-jaw chuck (3). A moving mechanism (5) is provided on both the three-jaw chuck (3) and the support platform (1). A fixed seat (6) is fixedly connected to the inner side wall of the three-jaw chuck (3). A guide plate (7) is slidably connected to the inner wall of the fixed seat (6). A clamping plate (8) is fixedly connected to the end face of the guide plate (7) near the rotor shaft (4). The clamping plate (8) is slidably connected to the support platform (1). The clamping plate (8) is in contact with the rotor shaft (4). An elastic element (10) is fixedly connected to the surface of the clamping plate (8). The other end of the elastic element (10) is fixedly connected to the fixed seat (6).

2. The workpiece positioning fixture for a CNC milling machine according to claim 1, characterized in that: Four fixing seats (6) are provided, and the four fixing seats (6) are arranged in a ring array on the three-jaw chuck (3).

3. The workpiece positioning fixture for a CNC milling machine according to claim 1, characterized in that: The inner sidewall of the card plate (8) is provided with a plurality of contact grooves (9), which are evenly distributed on the card plate (8).

4. The workpiece positioning fixture for a CNC milling machine according to claim 1, characterized in that: The moving mechanism (5) includes fixed ears (50). Fixed ears (50) are fixedly connected to both the left and right ends of the support platform (1). A guide rod (51) is fixedly connected between the two fixed ears (50). A guide block (52) is slidably sleeved on the outer side of the guide rod (51). The guide block (52) is slidably connected to the support platform (1). The guide block (52) is fixedly connected to the three-jaw chuck (3). A motor (53) is fixedly installed on the left end of the support platform (1). A screw (54) is fixedly connected to the output shaft of the motor (53). A slider (55) is threadedly connected to the outer side of the screw (54). The slider (55) is connected to the support platform (1). The slider (55) is fixedly connected to the three-jaw chuck (3). The right end of the support platform (1) is fixedly connected to the fixing plate (56). The screw (54) is rotatably connected to the fixing plate (56). The right end of the screw (54) is fixedly connected to the rotating disk (59). The left end of the rotating disk (59) is provided with a round hole (590). The right end of the fixing plate (56) is fixedly connected to the fixing block (591). The inner wall of the fixing block (591) is slidably connected to the moving frame (592). The inner wall of the vertical part of the moving frame (592) is fixedly connected to the round rod (593). The round rod (593) is slidably connected to the round hole (590).

5. A workpiece positioning fixture for a CNC milling machine according to claim 4, characterized in that: The outer side of the screw (54) is fixedly sleeved with a limiting disk one (57), the limiting disk one (57) is rotatably connected to the fixing plate (56), and the outer side of the screw (54) is fixedly sleeved with a limiting disk two (58), the limiting disk two (58) is rotatably connected to the fixing plate (56).

6. A workpiece positioning fixture for a CNC milling machine according to claim 4, characterized in that: Multiple circular holes (590) are provided, and the multiple circular holes (590) are arranged in a ring array on the rotating disk (59).

7. A workpiece positioning fixture for a CNC milling machine according to claim 4, characterized in that: An elastic body (594) is fixedly connected to the left end of the round rod (593), and the other end of the elastic body (594) is fixedly connected to the fixing plate (56).

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