Fixture for numerical control automatic machining of hardware and rapid and precise positioning and clamping

Abstract

The utility model relates to the technical field of machining clamps, in particular to a hardware numerical control automatic machining fast and precise positioning and clamping clamp, when a first distance sensor detects that a workpiece is close to each other, an electric signal is sent to a control box, and the control box controls a stepping motor to rotate anticlockwise; the stepping motor can drive a transmission rod to rotate clockwise through a straight tooth gear set, the transmission rod can drive two threaded rods to rotate through a bevel gear set, and therefore the threaded rods rotate to enable a sliding clamping plate to slide on a clamping base, and the sliding clamping plate can clamp a workpiece through sliding; when the second distance sensor abuts against the workpiece along with sliding of the sliding clamping plate, an electric signal is sent to the control box to enable the stepping motor to stop rotating, the pull sleeve overcomes the elastic force of the spring to slide towards the side end, the pull sleeve slides to enable the first distance sensor to be away from the surface of the workpiece, and the control box controls the stepping motor to rotate clockwise. Therefore, the sliding clamping plate is dragged to reset.

Description

Technical Field

[0001] The utility model relates to the technical field of processing fixtures, in particular to a fixture for fast and precise positioning and clamping of numerically controlled automated processing of hardware parts. Background Art

[0002] In the CNC automated processing of hardware parts, the fixture is one of the key factors to achieve efficient and precise production. It not only ensures the stability of the hardware during the processing, but also improves the processing accuracy and shortens the processing time, thereby improving the overall production efficiency.

[0003] Existing Chinese patent: A fixture for fast and precise positioning and clamping of CNC automated machining of hardware parts, patent number: CN214979298U, comprises a base plate with a positioning clamping plate fixedly connected to the rear side of the upper end of the base plate. The front side of the upper end of the base plate defines a bilaterally symmetrical adjustment slot, in which an adjustment block is slidably connected. A movable clamping plate is fixedly connected to the upper end of each adjustment block and another adjustment block. The front end of the positioning clamping plate is fixedly connected to a bilaterally symmetrical long threaded rod, which extends forward through a through hole. The upper ends of the positioning clamping plate and the movable clamping plate each define a bilaterally symmetrical sliding slot, in which a sliding block is slidably connected. The upper end of each sliding block is fixedly connected to a vertical support plate. This fixture for fast and precise positioning and clamping of hardware parts for CNC automated machining of hardware parts utilizes a rubber pressure column and an L-shaped positioning support plate to clamp hardware parts from different directions and from the top, making it suitable for hardware of varying thicknesses.

[0004] However, during the implementation of the above technical solution, it was found that there are at least the following technical problems: the above-mentioned clamp requires manual rotation of two threaded rods to slide the movable clamping plate to clamp the workpiece. Manual rotation of the threaded rods not only has a low degree of automation but also is slow. Utility Model Content

[0005] (1) Technical problems solved

[0006] In response to the shortcomings of the existing technology, the utility model provides a fixture for fast and precise positioning and clamping of CNC automated processing of hardware parts, which solves the technical problems of the above-mentioned fixture, which requires manual rotation of two threaded rods to make the movable clamping plate slide and clamp the workpiece. Manual rotation of the threaded rods not only has a low degree of automation but also has a slow speed.

[0007] (2) Technical solution

[0008] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] A fixture for fast and precise positioning and clamping of CNC automated processing of hardware parts, comprising a clamping seat, a sliding clamping plate, a threaded rod, a pulling sleeve, a first distance sensor, a second distance sensor, a stepping motor, a spur gear set, a transmission rod, a bevel gear set, a control box, a rubber pad and a spring. The sliding clamping plate is slidably mounted on the clamping seat, the threaded rod is symmetrically rotationally mounted on both sides of the clamping seat, the pulling sleeve is slidably mounted on the side ends of the clamping seat, and the first distance sensor is fixedly mounted on the inner side wall of the pulling sleeve; the sliding clamping plate and the threaded rod are threadedly connected, the spring is mounted between the clamping seat and the pulling sleeve, the second distance sensor is fixedly mounted on the sliding clamping plate, the stepping motor is fixedly mounted on the side end of the clamping seat, the transmission rod is rotationally mounted on the side end of the clamping seat, the spur gear set is mounted at the connection between the stepping motor and the transmission rod, and the bevel gear set is mounted at the connection between the threaded rod and the transmission rod.

[0010] Preferably, the control box is fixedly mounted on a side end of the clamping seat; the control box is connected to the first distance sensor, the second distance sensor and the stepping motor via wires.

[0011] Preferably, the rubber pads are installed on the side ends of the clamping seat and the sliding clamping plate.

[0012] (3) Beneficial effects

[0013] 1. The position of the workpiece is detected by the first distance sensor to control the stepping motor to rotate forward and reverse, so that the threaded rod rotates to push the sliding clamp to clamp the workpiece, achieving the effect of clamping the workpiece quickly and automatically.

[0014] Second, the stepper motor drives the transmission rod to rotate through the spur gear set, and the transmission rod then drives the threaded rod to rotate simultaneously through two bevel gear sets, so that the force on both sides of the sliding clamp is even, and the pressure applied by the sliding clamp to clamp the workpiece is balanced. At the same time, the second distance sensor can stop the stepper motor in time after it is close to the workpiece, avoiding excessive pressure on the workpiece, achieving the effect of accurate clamping position and preventing the workpiece from being deformed by clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0016] Figure 1 This is a structural diagram of the clamping seat of the utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the pull sleeve of the present utility model;

[0018] Figure 3 This is a structural diagram of the transmission rod of the utility model;

[0019] Figure 4 For this utility model Figure 2 A magnified structure diagram.

[0020] Legend: 1. Clamping seat; 2. Sliding clamp; 3. Threaded rod; 4. Pull sleeve; 5. First distance sensor; 6. Second distance sensor; 7. Stepper motor; 8. Spur gear set; 9. Transmission rod; 11. Bevel gear set; 12. Control box; 13. Rubber pad; 14. Spring. DETAILED DESCRIPTION

[0021] The embodiment of the present application effectively solves the above-mentioned clamp by providing a clamp for fast and precise positioning and clamping of CNC automated processing of hardware. It is necessary to manually rotate two threaded rods to make the movable clamping plate slide to clamp the workpiece. Manual rotation of the threaded rod not only has a low degree of automation but also has a slow speed. The first distance sensor detects the position of the workpiece to control the stepper motor to rotate forward and reverse, so that the threaded rod rotates to push the sliding clamp to clamp the workpiece, achieving the effect of being able to clamp the workpiece quickly and automatically. The stepper motor drives the transmission rod to rotate through a spur gear set, and the transmission rod then drives the threaded rod to rotate simultaneously through two bevel gear sets, so that the force on both sides of the sliding clamp is evenly distributed, so that the pressure applied by the sliding clamp to clamp the workpiece is balanced. At the same time, the second distance sensor can stop the stepper motor in time after it is close to the workpiece, avoiding excessive pressure on the workpiece, and achieving the effect of accurately clamping the position and preventing the workpiece from being clamped and deformed.

[0022] Example

[0023] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the technical solution in the embodiment of the present application effectively solves the technical problem that the above-mentioned clamp needs to manually rotate the two threaded rods to slide the movable clamping plate to clamp the workpiece, and the manual rotation of the threaded rods not only has a low degree of automation but also is slow. The overall idea is as follows:

[0024] In response to the problems existing in the prior art, the utility model provides a fixture for fast and precise positioning and clamping of CNC automated processing of hardware, including a clamping seat 1, a sliding splint 2, a threaded rod 3, a pull sleeve 4, a first distance sensor 5, a second distance sensor 6, a stepping motor 7, a spur gear set 8, a transmission rod 9, a bevel gear set 11, a control box 12, a rubber pad 13 and a spring 14. The sliding splint 2 is slidably installed on the clamping seat 1, the threaded rod 3 is symmetrically rotationally installed on both sides of the clamping seat 1, and the pull sleeve 4 is slidably installed on the side end of the clamping seat 1.

[0025] The first distance sensor 5 is fixedly mounted on the inner wall of the pull sleeve 4; the sliding splint 2 and the threaded rod 3 are threadedly connected, the spring 14 is installed between the clamping seat 1 and the pull sleeve 4, the second distance sensor 6 is fixedly mounted on the sliding splint 2, the stepping motor 7 is fixedly mounted on the side end of the clamping seat 1, and the transmission rod 9 is rotatably mounted on the side end of the clamping seat 1.

[0026] The spur gear set 8 is installed at the connection between the stepper motor 7 and the transmission rod 9, the bevel gear set 11 is installed at the connection between the threaded rod 3 and the transmission rod 9, and the control box 12 is fixedly installed on the side end of the clamping seat 1; the control box 12 is connected to the first distance sensor 5, the second distance sensor 6 and the stepper motor 7 through wires, and the rubber pad 13 is installed on the side ends of the clamping seat 1 and the sliding splint 2.

[0027] Working principle:

[0028] In the first step, the control box 12 is equipped with an STM32 single-chip microcomputer. The first distance sensor 5 and the second distance sensor 6 are inductive distance sensors. The magnetic field is generated by the internal coil. When the metal object approaches the magnetic field, eddy currents are generated on the surface of the object, thereby affecting the inductance value of the coil. By measuring the change in the inductance value, the distance between the object and the sensor can be determined. The workpiece to be clamped is placed on the clamping seat 1 so that the workpiece is close to the first distance sensor 5. When the first distance sensor 5 detects that the workpiece is close, it will send an electrical signal to the control box 12, and the control box 12 will control the stepper motor 7 to rotate counterclockwise. The stepper motor 7 will drive the transmission rod 9 to rotate clockwise through the spur gear set 8, and the transmission rod 9 will drive the two threaded rods 3 to rotate through the bevel gear set 11. Since the threaded rod 3 is threadedly connected to the sliding clamp 2, the rotation of the threaded rod 3 will cause the sliding clamp 2 to slide on the clamping seat 1, and the sliding clamp 2 will clamp the workpiece by sliding. When the second distance sensor 6 slides close to the workpiece as the sliding clamp 2 slides, it will send an electrical signal to the control box 12 to stop the stepper motor 7 from rotating. The two rubber pads 13 clamp the workpiece from both sides, which can increase friction and also have a buffering effect.

[0029] In the second step, when the workpiece is processed, pull the sleeve 4 so that the sleeve 4 overcomes the elastic force of the spring 14 and slides to the side end. The sliding of the sleeve 4 can make the first distance sensor 5 away from the workpiece surface. The first distance sensor 5 detects that the workpiece is away and will send an electrical signal to the control box 12. The control box 12 will control the stepper motor 7 to rotate clockwise. The stepper motor 7 will drive the transmission rod 9 to rotate counterclockwise through the spur gear set 8. The transmission rod 9 will drive the two threaded rods 3 to reverse through the bevel gear set 11, thereby dragging the sliding splint 2 to reset, and the workpiece can be taken out. After taking out the workpiece, release the sleeve 4. The sleeve 4 will reset under the elastic force of the spring 14, and the next workpiece can be placed for processing.

[0030] Finally, it should be noted that the above embodiments are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to enumerate all embodiments here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A fixture for fast and precise positioning and clamping of CNC automated processing of hardware parts, characterized in that: The invention comprises a clamping seat (1), a sliding clamping plate (2), a threaded rod (3), a pulling sleeve (4), a first distance sensor (5), a second distance sensor (6), a stepping motor (7), a spur gear set (8), a transmission rod (9), a bevel gear set (11), a control box (12), a rubber pad (13) and a spring (14).

2. A fixture for fast and precise positioning and clamping of CNC automated processing of hardware as claimed in claim 1, characterized in that: The sliding clamp (2) is slidably mounted on the clamping seat (1), the threaded rod (3) is symmetrically rotationally mounted on both sides of the clamping seat (1), the pull sleeve (4) is slidably mounted on the side end of the clamping seat (1), and the first distance sensor (5) is fixedly mounted on the inner side wall of the pull sleeve (4); The sliding clamping plate (2) and the threaded rod (3) are threadedly connected.

3. A fixture for fast and precise positioning and clamping of CNC automated machining of hardware as claimed in claim 1, characterized in that: The spring (14) is installed between the clamping seat (1) and the pulling sleeve (4), the second distance sensor (6) is fixedly installed on the sliding clamp (2), the stepping motor (7) is fixedly installed on the side end of the clamping seat (1), and the transmission rod (9) is rotatably installed on the side end of the clamping seat (1).

4. A fixture for fast and precise positioning and clamping of CNC automated machining of hardware as claimed in claim 1, characterized in that: The spur gear set (8) is installed at the connection between the stepping motor (7) and the transmission rod (9), and the bevel gear set (11) is installed at the connection between the threaded rod (3) and the transmission rod (9).

5. The fixture for fast and precise positioning and clamping of hardware CNC automated processing according to claim 1, characterized in that: The control box (12) is fixedly mounted on the side end of the clamping seat (1); The control box (12) is connected to the first distance sensor (5), the second distance sensor (6) and the stepping motor (7) via wires.

6. A fixture for fast and precise positioning and clamping of CNC automated machining of hardware as claimed in claim 1, characterized in that: The rubber pad (13) is installed on the side ends of the clamping seat (1) and the sliding clamping plate (2).

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