A CNC machining fixture

Abstract

The utility model relates to mechanical processing auxiliary equipment technical field especially, a kind of CNC machining fixture for being installed on CNC processing equipment, including bottom plate, the top fixed connection of bottom plate has locating block, two support blocks are arranged on the opposite sides of locating block on bottom plate, the top of two support blocks is respectively fixedly connected with hinged block, the top of two hinged blocks is respectively hinged with hinged plate by pin shaft, the top of two hinged plates is respectively hinged with material pressing swing arm by pin shaft, the similar end of two material pressing swing arms is respectively hinged with conical material pressing block by pin shaft, two conical material pressing blocks are above locating block, the far end of two material pressing swing arms is respectively hinged with drive assembly by pin shaft;The utility model realizes two conical material pressing blocks to place the uniform clamping force of workpiece in locating block by drive assembly, it is favorable to improve processing accuracy;The utility model's locating block can realize stable and reliable positioning to the workpiece of circular, square, polygon or special-shaped structure, can improve processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary equipment for mechanical processing, and in particular to a CNC machining fixture. Background Technology

[0002] In CNC machining, to ensure machining accuracy and operational safety, fixtures are needed to securely fix the workpiece. Existing CNC machining fixtures often cannot simultaneously fix round, square, polygonal, or irregularly shaped workpieces. CNC fixtures for round workpieces often require a square jig to achieve positioning, resulting in low clamping efficiency, high cost, and cumbersome jig replacement. In addition, some CNC machining fixtures lack a positioning system, making it difficult to achieve stable and reliable positioning and clamping. This can easily lead to displacement or vibration during machining, resulting in increased machining errors and even scrapping of the workpiece. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned problems in the prior art and provide a CNC machining fixture with a reasonable structural design and simple operation. It can achieve stable and reliable positioning and clamping of workpieces with circular, square, polygonal or irregular shapes without the need for additional machining fixtures, and can effectively improve machining efficiency and accuracy.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A CNC machining fixture for mounting on a CNC machining equipment includes a base plate, a positioning block fixedly connected to the top of the base plate, two support blocks on opposite sides of the positioning block on the base plate, hinge blocks fixedly connected to the top of the two support blocks, hinge plates hinged to the top of the two hinge blocks by pins, and pressure arms hinged to the top of the two hinge plates by pins. Conical pressure blocks are hinged to the adjacent ends of the two pressure arms by pins, the two conical pressure blocks are located above the positioning block, and drive components are hinged to the distant ends of the two pressure arms by pins.

[0005] Furthermore, the drive assembly includes two sliding plates hinged to the far ends of the two pressure arms, and two guide plates fixedly connected to opposite ends of the base plate. The two sliding plates are slidably fitted onto the two guide plates. A rack is provided on the opposite side of each sliding plate, and a transmission gear is meshed on each rack. The two transmission gears are respectively sleeved on two transmission rods. Both transmission rods are rotatably mounted on a CNC machining equipment. A first bevel gear is sleeved on one end of each transmission rod. Two second bevel gears are respectively meshed on the adjacent sides of the two first bevel gears. Both second bevel gears are sleeved on the same rotating rod. One end of the rotating rod is connected to the shaft of a drive motor, and the drive motor is mounted on the CNC machining equipment.

[0006] Furthermore, a groove is provided on one side of the guide plate, and two guide bars that slide in cooperation with the groove are provided on opposite sides of the sliding plate.

[0007] Furthermore, an anti-slip rubber pad is provided on the side of the conical pressing block facing the positioning block.

[0008] Furthermore, a rectangular placement groove is provided on the top of the positioning block, and two triangular placement grooves connecting the placement groove are also provided on the top of the positioning block. A detachable positioning post is provided at the center of the rectangular placement groove.

[0009] Furthermore, one end of the material pressing arm hinged to the conical material pressing block is spoon-shaped.

[0010] Compared with the prior art, the CNC machining fixture provided by this utility model has the following beneficial effects: This invention achieves synchronous movement of two conical pressure blocks through a drive assembly, applying a uniform clamping force to the workpiece placed on the positioning block, ensuring the stability and reliability of clamping, and improving machining accuracy. The positioning block of this invention can achieve stable and reliable positioning of workpieces with circular, square, polygonal, or irregular shapes, without the need for additional matching machining fixtures, thus improving machining efficiency. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of a CNC machining fixture according to the present invention; Figure 2 This is a schematic diagram of the overall structure of another side of a CNC machining fixture according to the present invention; Figure 3 This is a front view schematic diagram of a CNC machining fixture according to the present invention.

[0012] Labels in the diagram: 1-Base plate; 2-Positioning block; 21-Rectangular placement slot; 22-Triangular placement slot; 23-Positioning column; 3-Support block; 4-Hinge block; 5-Hinge plate; 6-Pressure arm; 7-Conical pressure block; 71-Anti-slip rubber pad; 8-Drive assembly; 81-Sliding plate; 811-Rack; 812-Guide bar; 82-Guide plate; 83-Transmission gear; 84-Transmission rod; 85-First bevel gear; 86-Second bevel gear; 87-Rotating rod; 88-Drive motor. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0014] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0015] like Figures 1-3 As shown, a CNC machining fixture for mounting on a CNC machining equipment includes a base plate 1. A positioning block 2 is fixedly connected to the top of the base plate 1. Two support blocks 3 are arranged on the base plate 1 on opposite sides of the positioning block 2. Hinged blocks 4 are fixedly connected to the top of the two support blocks 3 respectively. Hinged plates 5 are hinged to the top of the two hinged blocks 4 respectively by pins. Pressure arms 6 are hinged to the top of the two hinged plates 5 respectively by pins. Conical pressure blocks 7 are hinged to the adjacent ends of the two pressure arms 6 respectively by pins. The conical pressure block 7 is located above the positioning block 2. The two pressure swing arms 6 are respectively hinged to the drive assembly 8 by a pin at their far ends. The end of the pressure swing arm 6 that is hinged to the conical pressure block 7 is spoon-shaped. When the pressure swing arm 6 raises the conical pressure block 7 to its highest point, the spoon-shaped pressure swing arm 6 can accommodate the conical pressure block 7, which can prevent the conical pressure block 7 from colliding with the pressure swing arm 6. Moreover, the conical pressure block 7 is conical, which can better press the workpiece and effectively prevent the workpiece from vibrating and loosening during processing.

[0016] Specifically, the drive assembly 8 includes two sliding plates 81 respectively hinged to the far ends of the two pressure arms 6, and two guide plates 82 respectively fixedly connected to the opposite ends of the base plate 1. The two sliding plates 81 are slidably fitted on the two guide plates 82. A rack 811 is provided on the opposite side of the two sliding plates 81. The two racks 811 are respectively meshed with transmission gears 83. The two transmission gears 83 are respectively sleeved on the two transmission rods 84. The two transmission rods 84 are rotatably mounted on the CNC machining equipment. A first bevel gear 85 is sleeved on one end of the two transmission rods 84. Two second bevel gears 86 are respectively meshed on the adjacent sides of the two first bevel gears 85. The two second bevel gears 86 are both sleeved on the same rotating rod 87. The rotating shaft of the drive motor 88 is connected to one end of the rotating rod 87. The drive motor 88 is mounted on the CNC machining equipment.

[0017] More specifically, a groove is provided on one side of the guide plate 82, and two guide bars 812 that slide in cooperation with the groove are provided on the opposite sides of the sliding plate 81, which can ensure that the sliding plate 81 slides smoothly up and down, thereby ensuring the working stability of the pressure swing arm 6.

[0018] A non-slip rubber pad 71 is provided on the side of the conical pressure block 7 facing the positioning block 2. The non-slip rubber pad 71 is made of hard rubber material and has a certain friction force, which can avoid direct contact between the conical pressure block 7 and the workpiece, protect the surface of the workpiece, and enhance the clamping and fixing effect of the workpiece.

[0019] The top of the positioning block 2 is provided with a rectangular placement slot 21, which is used to place workpieces with rectangular, polygonal or other structures. The top of the positioning block 2 is also provided with two triangular placement slots 22 that connect the placement slots. The triangular placement slots 22 are used to place workpieces with circular or other irregular shapes, thereby achieving fast and accurate positioning of workpieces with circular, square, polygonal or other irregular shapes. A detachable positioning post 23 is provided at the center of the rectangular placement slot 21. It is connected to the positioning block 2 by tightening the thread. When the workpiece has a hole that matches the positioning post 23, the positioning post 23 can position and limit the workpiece, which improves the fixation effect of the workpiece. When the workpiece does not have a matching hole, the positioning post 23 can be removed by loosening the thread. The operation is convenient and simple, and it is highly practical.

[0020] The working process of this utility model is as follows: In order to ensure that the workpiece is fixed stably and reliably, holes for matching positioning posts 23 are opened on the workpiece; the irregular workpiece to be processed is placed in the rectangular placement groove 21 and the triangular placement groove 22 of the positioning block 2, and the initial positioning is achieved by the positioning posts 23. Subsequently, the drive motor 88 is started, which drives the rotating rod 87 to rotate. The two second bevel gears 86 on the rotating rod 87 rotate synchronously. The two second bevel gears 86 drive the two first bevel gears 85 to rotate, which in turn drives the two transmission rods 84 and the transmission gear 83 to rotate. The transmission gear 83 meshes with the rack 811 on the sliding plate 81, causing the two sliding plates 81 to slide synchronously upward on the guide plate 82, which drives the pressure arm 6 to rotate around the hinge plate 5, thereby causing the two conical pressure blocks 7 to press the workpiece. After processing is completed, the drive motor reverses 88, all components reset, the clamping on the workpiece is released, and the workpiece can be removed.

[0021] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A CNC machining fixture for mounting on a CNC machining equipment, characterized in that, Includes a base plate (1), a positioning block (2) is fixedly connected to the top of the base plate (1), two support blocks (3) are provided on the base plate (1) on opposite sides of the positioning block (2), a hinge block (4) is fixedly connected to the top of the two support blocks (3), a hinge plate (5) is hinged to the top of the two hinge blocks (4) by a pin, a pressure swing arm (6) is hinged to the top of the two hinge plates (5) by a pin, a conical pressure block (7) is hinged to the near end of the two pressure swing arms (6) by a pin, the two conical pressure blocks (7) are located above the positioning block (2), and a drive assembly (8) is hinged to the far end of the two pressure swing arms (6) by a pin. The drive assembly (8) includes two sliding plates (81) respectively hinged to the far ends of the two pressure swing arms (6), and two guide plates (82) respectively fixedly connected to the opposite ends of the base plate (1). The two sliding plates (81) are slidably fitted on the two guide plates (82). A rack (811) is provided on the opposite side of the two sliding plates (81). The two racks (811) are respectively meshed with transmission gears (83). The two transmission gears (83) are respectively sleeved on the two transmission rods (84). The two transmission rods (84) are rotatably mounted on the CNC machining equipment. A first bevel gear (85) is sleeved on one end of the two transmission rods (84). Two second bevel gears (86) are respectively meshed on the close side of the two first bevel gears (85). The two second bevel gears (86) are both sleeved on the same rotating rod (87). The rotating rod (87) is connected to the shaft of the drive motor (88) at one end. The drive motor (88) is mounted on the CNC machining equipment.

2. The CNC machining fixture according to claim 1, characterized in that, The guide plate (82) has a groove on one side, and the sliding plate (81) has two guide bars (812) on opposite sides that slide in cooperation with the groove.

3. A CNC machining fixture according to claim 1, characterized in that, The conical pressing block (7) has an anti-slip rubber pad (71) on the side facing the positioning block (2).

4. A CNC machining fixture according to claim 1, characterized in that, The top of the positioning block (2) is provided with a rectangular placement groove (21), and the top of the positioning block (2) is also provided with two triangular placement grooves (22) connecting the placement groove. A detachable positioning post (23) is provided at the center of the rectangular placement groove.

5. A CNC machining fixture according to claim 1, characterized in that, The end of the material pressing arm (6) that is hinged to the conical material pressing block (7) is spoon-shaped.

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