Workpiece clamping tool

Abstract

This application relates to the field of automotive fixture technology, and particularly to a workpiece clamping fixture, comprising a base, a cylindrical body, and an end plate. The end plate is fixed to one end of the cylindrical body, and an opening is provided on the end of the cylindrical body away from the end plate. An assembly step is provided on the inner side of the opening. Two oppositely distributed through holes are provided on the end plate. A positioning disc is mounted on the end plate and located between the two through holes. A sliding block is assembled in a cavity and can slide axially within the cylindrical body. A cavity is provided on the end of the sliding block away from the end plate. Two oppositely arranged tie rods are mounted on the sliding block, extending axially along the cylindrical body. The two tie rods extend from the two through holes on the end plate, respectively, and slide with the through holes. A pressure plate is installed on the end of the tie rod extending out of the end plate. The fixture of this application is specifically designed for mounting on the spindle of a CNC lathe to clamp workpieces. It can quickly and accurately clamp workpieces, reduce manual intervention, significantly shorten clamping time, and improve production efficiency.

Description

Technical Field

[0001] This application relates to the field of automotive clamping technology, and in particular to a workpiece clamping fixture. Background Technology

[0002] When CNC lathes process ordinary round workpieces, they are usually clamped by manual or hydraulic three-jaw chucks. When complex workpieces require special fixtures or there is no suitable clamping surface, using manual bolt clamping plates will become time-consuming and labor-intensive. The clamping time will increase exponentially in the entire processing cycle and become unreliable, thus affecting production efficiency. Utility Model Content

[0003] This application aims to at least partially address one of the aforementioned technical problems in the prior art. To this end, embodiments of this application provide a workpiece clamping fixture specifically designed for mounting on the spindle of a CNC lathe to clamp workpieces. This fixture enables rapid and precise workpiece clamping, reduces manual intervention, significantly shortens clamping time, and improves production efficiency.

[0004] A workpiece clamping fixture, comprising: The base includes a cylindrical body and an end plate. The end plate is fixed to one end of the cylindrical body. An opening is provided on the cylindrical body at the end away from the end plate. An assembly step is provided on the inner side of the opening. The assembly step is used to connect to the spindle of a CNC lathe. Two through holes are provided on the end plate. A positioning plate is mounted on the end plate and located between the two through holes. The positioning plate is used to cooperate with the base of the workpiece to be pressed. A sliding block is assembled in the cylinder and is axially slidable within the cylinder. A cavity is provided at the end of the sliding block away from the end plate. The cavity is used to connect a tie rod in the inner hole of the CNC lathe spindle. Two opposing tie rods are mounted on the sliding block and extend axially along the cylinder. The two tie rods extend out from two through holes on the end plate and slide in cooperation with the through holes. A pressure plate is installed at the end of the tie rod extending out of the end plate.

[0005] In an optional or preferred embodiment, sliders are provided on both sides of the sliding block, and grooves are opened on both sides of the cylinder, with the two sliders respectively assembled in the two grooves.

[0006] In an optional or preferred embodiment, the two pull rods are respectively mounted on the two sliders.

[0007] In an optional or preferred embodiment, the outer wall of the cylinder is provided with a reinforcing plate that spans the groove.

[0008] In an optional or preferred embodiment, the outer wall of the cylinder is provided with connecting platforms on both sides of the slide groove, and the two ends of the reinforcing plate are connected to the connecting platforms on both sides of the slide groove.

[0009] In an optional or preferred embodiment, a connecting hole is provided on the step surface of the assembly step.

[0010] In an optional or preferred embodiment, the inner wall of the cavity is provided with internal threads.

[0011] In an optional or preferred embodiment, the positioning disk is mounted in the middle of the end plate.

[0012] In an optional or preferred embodiment, the pressure plates on the two pull rods are arranged facing each other.

[0013] In an optional or preferred embodiment, the end of the pressure plate has a trapezoidal structure.

[0014] Based on the above technical solution, the embodiments of this application have at least the following beneficial effects: the assembly step on the inner side of the cylinder opening is connected to the CNC lathe spindle, and the cavity of the sliding block is connected to the tie rod in the inner hole of the CNC lathe spindle. When the CNC lathe tie rod moves, the sliding block can drive the two tie rods to slide, thereby causing the pressure plate on the tie rod to press and release the workpiece, thus realizing automated clamping. The fixture of this application is specifically designed to be installed on the spindle of a CNC lathe to clamp the workpiece. It can quickly and accurately clamp the workpiece, reduce manual intervention, significantly shorten clamping time, and improve production efficiency. Attached Figure Description

[0015] The present application will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a schematic diagram of the workpiece clamping fixture according to an embodiment of this application. Figure 2 yes Figure 1 A schematic diagram of the base structure in the illustrated embodiment; Figure 3 yes Figure 1 A schematic diagram showing the positional relationship between the sliding block, the pull rod, and the pressure plate in the illustrated embodiment; Figure 4 This is a schematic diagram of the workpiece clamping device according to an embodiment of this application; Figure 5 yes Figure 4 A side sectional view of the embodiment shown.

[0016] Figure label: 100-Base; 110-Cylinder; 111-Assembly step; 112-Connecting hole; 113-Slide groove; 114-Connecting platform; 120-End plate; 200-Positioning plate; 300-Sliding block; 310-Cavity; 320-Slider; 400-Workpiece; 500-Tie rod; 510-Pressure plate; 600-Reinforcing plate. Detailed Implementation

[0017] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0018] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0020] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0021] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0022] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0023] When CNC lathes process ordinary round workpieces, they are usually clamped by manual or hydraulic three-jaw chucks. When complex workpieces require special clamping parts or there is no suitable clamping surface, using manual bolt clamping plates will become time-consuming and laborious. The clamping time will increase exponentially in the entire processing cycle and become unreliable.

[0024] To facilitate understanding of the technical solution of this utility model, a detailed description is provided below with reference to different embodiments. The workpiece clamping fixture of this utility model, through its reasonable structural design, effectively solves the problems of time-consuming, labor-intensive, and unreliable clamping during the machining of complex workpieces on CNC lathes.

[0025] Reference Figures 1 to 5 This application provides a workpiece clamping fixture, including a base 100, a positioning plate 200 and a sliding block 300.

[0026] The base 100 includes a cylindrical body 110 and an end plate 120. The end plate 120 is fixedly installed at one end of the cylindrical body 110. The other end of the cylindrical body 110 has an opening. An assembly step 111 is provided on the inner side of the opening. The assembly step 111 is a stepped structure formed by the inner side of the cylindrical wall of the end of the cylindrical body 110 away from the end plate 120, which is recessed inward along the axial direction of the cylindrical body 110. It is used to connect with the spindle of a CNC lathe. Specifically, a connecting hole 112 is provided on the step surface of the assembly step 111. After the spindle is assembled into the assembly step 111, a screw is passed through the connecting hole 112 to achieve a fixed connection between the spindle and the base 100.

[0027] The positioning plate 200 is mounted on the end plate 120. Specifically, the positioning plate 200 is fixed to the middle of the end plate 120 by three bolts. The positioning plate 200 has a stepped structure and is used to cooperate with the base of the workpiece 400 to achieve the initial positioning of the workpiece 400. By setting the positioning plate 200, the workpiece 400 can be prevented from shifting during clamping, ensuring the concentricity of the workpiece 400 and the CNC lathe spindle, and improving machining accuracy.

[0028] Two through holes are provided on the end plate 120, which are oppositely distributed, for the pull rod 500 to pass through. The two through holes are located on both sides of the positioning plate 200.

[0029] The sliding block 300 is assembled in the inner cavity of the cylinder 110. The sliding block 300 has a columnar structure and can slide along the axial direction of the cylinder 110. Two oppositely arranged tie rods 500 are installed on the sliding block 300. The tie rods 500 extend along the axial direction of the cylinder 110. The two tie rods 500 extend out from two through holes on the end plate 120 respectively. The tie rods 500 slide with the through holes. A pressure plate 510 is installed at the end of the tie rods 500 that extends out of the end plate 120.

[0030] The sliding block 300 has a cavity 310 at the end away from the end plate 120. The cavity 310 is connected to the push rod in the inner hole of the CNC lathe spindle. When the CNC lathe push rod moves, the sliding block 300 can drive the two pull rods 500 to slide, thereby causing the pressure plate 510 on the pull rod 500 to press and release the workpiece 400, thus realizing automated clamping.

[0031] The fixture of this application is specifically designed to be mounted on the spindle of a CNC lathe to clamp the workpiece 400. It can quickly and accurately clamp the workpiece 400, reduce manual intervention, significantly shorten clamping time, and improve production efficiency.

[0032] In some embodiments, sliders 320 are provided on both sides of the sliding block 300, and grooves 113 that cooperate with the sliders 320 are provided on both sides of the cylinder 110, with the two sliders 320 respectively assembled in the grooves 113. Through the guiding effect of the sliders 320 and the grooves 113, the sliding block 300 can achieve smooth linear movement inside the cylinder 110, effectively avoiding the jamming problem caused by eccentric force.

[0033] Specifically, the slider 320 is a rectangular block structure that is vertically set on the outer wall of the slider block 300, and the sliding grooves 113 on both sides of the cylinder 110 are also rectangular groove structures. The sliding grooves 113 extend axially from the end of the cylinder 110 away from the end plate 120 to the end of the cylinder 110 near the end plate 120.

[0034] Furthermore, the two pull rods 500 are respectively mounted on the two sliders 320, so that the pull rods 500 are always constrained by the sliders 320 during movement, thereby maintaining the stability and accuracy of the movement direction, preventing the pull rods 500 from deviating, and thus improving the operational reliability of the entire device and the clamping stability of the workpiece 400. In addition, integrating the pull rods 500 into the sliders 320 also makes the overall structure more compact and saves space.

[0035] Since the cylinder 110 has grooves 113 on both sides, in some embodiments, the outer wall of the cylinder 110 is reinforced. Specifically, a reinforcing plate 600 is provided laterally on the outer wall of the cylinder 110 at the location of the groove 113, and the reinforcing plate 600 is connected to the outer wall of the cylinder 110 across the groove 113.

[0036] To further improve the stability of the connection, the outer wall of the cylinder 110 is provided with connection platforms 114 on both sides of the slide groove 113, and the two ends of the reinforcing plate 600 are connected to the connection platforms 114 on both sides of the slide groove 113.

[0037] This structure can effectively disperse the concentrated stress generated by the clamping force at the slide groove 113, enhance the overall deformation resistance of the cylinder 110, and ensure that the device can maintain structural stability under high-intensity clamping without affecting the clamping accuracy due to local deformation of the cylinder 110.

[0038] In some embodiments, the ends of the pressure plates 510 are designed as trapezoidal structures. The two pressure plates 510 are arranged facing each other, and when the pneumatic action drives the pull rod 500, the pressure plates 510 can move synchronously toward the workpiece 400 and clamp it.

[0039] The symmetrical arrangement of the double pressure plates 510 ensures the balance of forces on the workpiece 400, keeping it stable during high-speed cutting. Not only is the clamping force more stable, but it can also adapt to the clamping requirements of workpieces 400 with different shapes, reducing workpiece loosening and machining errors.

[0040] In some embodiments, the inner wall of the cavity 310 at the end of the sliding block 300 away from the end plate 120 is provided with an internal thread. This threaded structure can be threadedly connected to the push rod in the inner hole of the CNC lathe spindle, thereby achieving detachable fixation. The threaded connection method is more convenient for maintenance or replacement, with fast disassembly and assembly speed and high repeatability.

[0041] The workpiece clamping fixture of this utility model can achieve rapid and reliable clamping of workpiece 400 while ensuring structural strength and clamping stability, and solves the technical problems of traditional clamping methods such as time-consuming and labor-intensive, inaccurate positioning and unstable clamping.

[0042] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A workpiece clamping fixture, characterized in that, include: The base includes a cylindrical body and an end plate. The end plate is fixed to one end of the cylindrical body. An opening is provided on the cylindrical body at the end away from the end plate. An assembly step is provided on the inner side of the opening. The assembly step is used to connect to the spindle of a CNC lathe. Two through holes are provided on the end plate. A positioning plate is mounted on the end plate and located between the two through holes. The positioning plate is used to cooperate with the base of the workpiece to be pressed. A sliding block is assembled in the cylinder and is axially slidable within the cylinder. A cavity is provided at the end of the sliding block away from the end plate. The cavity is used to connect a tie rod in the inner hole of the CNC lathe spindle. Two opposing tie rods are mounted on the sliding block and extend axially along the cylinder. The two tie rods extend out from two through holes on the end plate and slide in cooperation with the through holes. A pressure plate is installed at the end of the tie rod extending out of the end plate.

2. The workpiece clamping fixture according to claim 1, characterized in that: The sliding block is provided with sliders on both sides, and the cylinder is provided with grooves on both sides, with the two sliders respectively assembled in the two grooves.

3. The workpiece clamping fixture according to claim 2, characterized in that: The two pull rods are respectively mounted on the two sliders.

4. The workpiece clamping fixture according to claim 2, characterized in that: The outer wall of the cylinder is provided with a reinforcing plate that spans the slide groove.

5. The workpiece clamping fixture according to claim 4, characterized in that: The outer wall of the cylinder is provided with connecting platforms on both sides of the slide groove, and the two ends of the reinforcing plate are connected to the connecting platforms on both sides of the slide groove.

6. The workpiece clamping fixture according to claim 1, characterized in that: The assembly step has connection holes on its surface.

7. The workpiece clamping fixture according to claim 1, characterized in that: The inner wall of the cavity is threaded.

8. The workpiece clamping fixture according to claim 1, characterized in that: The positioning disk is installed in the middle of the end plate.

9. The workpiece clamping fixture according to claim 1, characterized in that: The pressure plates on the two pull rods are arranged facing each other.

10. The workpiece clamping fixture according to claim 9, characterized in that: The end of the pressure plate has a trapezoidal structure.

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