Rotary workpiece axial positioning and clamping device

Abstract

The application provides a rotating workpiece axial positioning and pressing device. The device solves the problem of insufficient stability of the existing thin-walled workpiece clamping, and the thin-walled workpiece is easy to move during processing, which affects the processing quality. In the application, the fluid ejected from the nozzle on the fluid pressure disc is used to press the workpiece against the rotating disc to complete the fixation of the workpiece, the workpiece is more stable during installation, and deformation does not occur, and the overturning moment generated during processing can be resisted under the condition that the height of the radial positioning device installed on the rotating disc is very low.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and in particular to a rotating workpiece axial positioning and clamping device. Background Technology

[0002] In machining, the processing of ring-shaped workpieces is frequently encountered, especially certain types. These ring-shaped workpieces are typically held using a three-jaw chuck. However, the jaws of a three-jaw chuck can easily deform the workpiece when clamping it. Therefore, suction cups were initially used to pick up the end faces of the ring-shaped workpieces for processing. However, the suction area of ​​the suction cup is insufficient for many ring-shaped workpieces; that is, the contact area between the suction cup and the end face of the ring-shaped workpiece is small, resulting in a small force-bearing area and insufficient clamping stability. The ring-shaped workpiece is prone to movement during processing, affecting the machining quality. Furthermore, when machining the inner and outer diameters of the ring-shaped workpiece, the clamping or positioning height needs to be lowered significantly; otherwise, it will interfere with the machining tools and grinding wheels. In such cases, the machining process will generate a large overturning torque, making existing processes difficult to implement, and there are areas for improvement in the current technology. Summary of the Invention

[0003] The present invention addresses the aforementioned existing conditions by providing a rotating workpiece axial positioning and clamping device, which is installed on a machine tool. The machine tool spindle is equipped with a radial positioning device for positioning the workpiece. The axial positioning and clamping device includes a rotating disk mounted on the machine tool spindle and perpendicular to the spindle axis. A fluid pressure disk is provided on the machine tool bed and can be fixedly mounted relative to the bed. The workpiece is located between the rotating disk and the fluid pressure disk, with a certain gap between the fluid pressure disk and the workpiece. The fluid pressure disk is equipped with several nozzles that spray fluid onto the end face of the workpiece, causing the workpiece to press against the rotating disk.

[0004] Preferably, the fluid pressure plate has a notch for the cutting tool to enter the fluid pressure plate and cut the inside of the workpiece, and the fluid pressure plate is C-shaped.

[0005] Preferably, the nozzles are evenly distributed on the end face of the fluid pressure plate facing the main shaft.

[0006] Preferably, the fluid pressure plate is mounted on the machine tool via a connecting rod that is movably mounted on the machine tool, and the position of the fluid pressure plate can be adjusted along the length of the spindle via the connecting rod.

[0007] Preferably, the radial positioning device includes two positioning blocks fixedly mounted on the rotating disk, which abut against the workpiece. The rotating disk is provided with a pressing block for pressing the workpiece against the positioning block. The positioning block and the pressing block are located on the inner and outer sides of the workpiece, respectively.

[0008] Preferably, the rotary disk is a suction cup, and the radial positioning device includes a plurality of pressure blocks disposed on the outer periphery of the workpiece.

[0009] Preferably, the pressure block is provided with a pressing surface that contacts the workpiece, and a driving mechanism for driving the pressure block to move is provided on one side of the pressure block.

[0010] Preferably, the driving mechanism includes a guide block fixedly mounted on a rotary disk, a guide rod movably mounted on the guide block, one end of the guide rod fixedly mounted on the pressure block, and a spring sleeved on the guide rod to drive the pressure block to move away from the guide block. A base is fixedly mounted on the rotary disk, and a wedge block is movably mounted on the side of the base facing the workpiece. The pressure block is fixedly mounted on the end face of the wedge block facing the workpiece. The spring is located above the wedge block and abuts against the wedge block. A certain gap is left between the guide rod and the wedge block. The machine tool is provided with a push rod for driving the wedge block to move towards the spring.

[0011] Preferably, the driving mechanism is a pneumatic cylinder or a hydraulic cylinder.

[0012] Compared with the prior art, in this invention, the workpiece is fixed by the fluid sprayed from the nozzle on the fluid pressure plate pressing it against the rotating plate. The workpiece is installed more stably and will not be deformed. At the same time, it can resist the overturning torque generated during processing even when the radial positioning device installed on the rotating plate is very low in height. Attached Figure Description

[0013] Figure 1 This is an overall structural view of the present invention;

[0014] Figure 2 This is an overall structural view of the fluid pressure plate;

[0015] Figure 3 This is an overall structural view of the rotating disk;

[0016] Figure 4 This is a schematic diagram of the structure of Example 3;

[0017] Figure 5 This is a schematic diagram of the structure of Example 5.

[0018] The markings in the diagram are: 1. Main shaft; 2. Rotary disk; 4. Radial positioning device; 5. Fluid pressure disk; 6. Nozzle; 7. Positioning block; 8. Pressure block; 9. Drive mechanism; 10. Guide block; 11. Guide rod; 12. Spring; 13. Connecting rod; 14. Pressing surface; 15. Base; 16. Wedge block; 17. Push rod. Detailed Implementation

[0019] The present invention will be further described below with reference to the embodiments illustrated in the accompanying drawings: Example 1

[0020] like Figure 1-3 As shown, a rotating workpiece axial positioning and clamping device is installed on a machine tool. The spindle 1 is equipped with a radial positioning device 4 for positioning the workpiece. The axial positioning and clamping device includes a rotary disk 2 mounted on the machine tool spindle 1, a rotary disk 2 perpendicular to the spindle 1's axis, and a fluid pressure disk 5 for pressing the workpiece against the rotary disk 2. The workpiece is located between the rotary disk 2 and the fluid pressure disk 5, with a certain gap between the fluid pressure disk 5 and the workpiece. Multiple nozzles 6 are fixedly installed on one end of the fluid pressure disk 5 facing the rotary disk 2, which spray water to press the workpiece against the rotary disk 2. The fluid pressure disk 5 has openings... A notch is provided for the cutting tool to enter the fluid pressure plate 5 and cut the interior of the workpiece. The fluid pressure plate 5 is C-shaped. The nozzles 6 are evenly distributed on the end face of the fluid pressure plate 5 facing the spindle 1. When machining the workpiece, the cutting tool can enter the fluid pressure plate 5 through this notch to machine the interior of the workpiece. The fluid pressure plate 5 is mounted on the machine tool via a connecting rod 13 that is movably mounted on the machine tool. The position of the fluid pressure plate 5 can be adjusted along the length of the spindle 1 via the connecting rod 13. The distance between the fluid pressure plate 5 and the rotating disk 2 can be easily adjusted via the connecting rod 13 for machining different workpieces. The radial positioning device 4 limits the workpiece in the radial direction, and the water flow sprayed from the nozzles 6 on the fluid pressure plate 5 presses the workpiece against the rotating disk 2 to complete the workpiece fixation. The workpiece is more securely installed and will not deform. At the same time, the radial positioning device 4 mounted on the rotating disk 2 can resist the overturning torque generated during machining even when the height is very low. When cutting the workpiece, the tool holder can move through the opening on the C-shaped fluid pressure plate 5 without contacting it. Simultaneously, the water flow presses the workpiece against the rotating disk 2, carrying away any residue from the machining process. The nozzle plane is parallel to the workpiece end face, and multiple nozzles are located on the same plane. Pressurized fluid is ejected from the nozzles and flows out through the gap between the nozzle plane and the workpiece end face, pressing the workpiece against the plane of the rotating disk 2.

[0021] The positioning device includes two positioning blocks 7 fixedly mounted on the rotating disk 2. Each positioning block 7 abuts against the inner wall of the workpiece. The rotating disk 2 is provided with a pressing block 8 for pressing the workpiece against the positioning blocks 7. The positioning blocks 7 and pressing blocks 8 are located on the inner and outer sides of the workpiece, respectively. Each pressing block 8 has a pressing surface 14 that contacts the workpiece. A driving mechanism 9 for moving the pressing block 8 is provided on one side of the pressing block 8. The driving mechanism 9 includes a guide block 10 fixedly mounted on the rotating disk 2. A guide rod 11 is movably mounted on the guide block 10. One end of the guide rod 11 is fixedly mounted on the pressing block 8. A spring 12 is sleeved on the guide rod 11 to drive the pressing block 8 away from the guide block 10. A base 15 is fixedly mounted on the rotating disk 2. A wedge block 16 is movably mounted on the side of the base 15 facing the workpiece. The pressing block 8 is fixedly mounted on the end face of the wedge block 16 facing the workpiece. The spring 12 is located on the wedge block. Above block 16, and with spring 12 abutting against the wedge block 16, a certain gap is left between the guide rod 11 and the wedge block 16. The machine tool is equipped with a push rod 17 for driving the wedge block 16 to move towards spring 12. When fixing the workpiece, spring 12 drives the wedge block 16 to move obliquely along base 15 and moves the pressure block 8 fixed on the wedge block 16 towards the workpiece, pressing the workpiece against the positioning block 7 to complete the workpiece fixing. After the workpiece is released by driving the wedge block 16 towards spring 12 through push rod 17, the workpiece is removed. Push rod 17 is a cylinder. Three-point positioning of the workpiece is achieved through two positioning blocks 7 and pressure block 8, and the workpiece is pressed tightly against the two positioning blocks 7 by the drive mechanism 9, making the positioning more stable and avoiding workpiece displacement during processing. Example 2

[0022] The difference from Embodiment 1 is that the rotating disk 2 is a suction cup, which fixes the workpiece in a double manner through the suction cup and the fluid pressure disk 5, and fixes the workpiece in the radial direction through multiple pressure blocks 8 surrounding the workpiece. Example 3

[0023] The difference from Embodiment 2 is that the driving mechanism 9 is a cylinder or a hydraulic cylinder. Example 4

[0024] The difference from Embodiment 1 is that there are two pressure blocks 8, and the pressure blocks 8 are arranged opposite to the positioning blocks 7. Example 5

[0025] The difference from Embodiment 1 is that the positioning block 7 is located on the outside of the workpiece, and the pressure block 8 is located inside the workpiece. The workpiece is positioned and fixed by the outer wall of the workpiece abutting against the positioning block 7.

[0026] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A rotating workpiece axial positioning and clamping device, mounted on a machine tool, wherein the machine tool spindle (1) is provided with a radial positioning device (4) for positioning the workpiece, characterized in that, The axial positioning and clamping device includes a rotary disk (2) mounted on the machine tool spindle (1) and perpendicular to the axis of the spindle (1). A fluid pressure disk (5) is provided on the machine tool bed and can be fixedly installed relative to the bed. The workpiece is located between the rotary disk (2) and the fluid pressure disk (5). A certain gap is left between the fluid pressure disk (5) and the workpiece. The fluid pressure disk (5) is provided with several nozzles (6) to spray fluid onto the end face of the workpiece, so that the workpiece is pressed against the rotary disk (2). The fluid pressure disk (5) has openings for the cutting tool to enter the fluid pressure disk (5) to press the workpiece inside. The fluid pressure plate (5) is C-shaped and is mounted on the machine tool via a connecting rod (13) that is movably mounted on the machine tool. The fluid pressure plate (5) can be adjusted along the length of the spindle (1) via the connecting rod (13). The radial positioning device (4) includes two positioning blocks (7) fixedly mounted on the rotary disk (2). The positioning blocks (7) abut against the workpiece. The rotary disk (2) is provided with a pressing block (8) for pressing the workpiece against the positioning blocks (7). The positioning blocks (7) and the pressing block... (8) Located on the inner and outer sides of the workpiece respectively, the pressure block (8) is provided with a pressing surface (14) that contacts the workpiece. A driving mechanism (9) for driving the pressure block (8) to move is provided on one side of the pressure block (8). The driving mechanism (9) includes a guide block (10) fixedly mounted on the rotating disk (2). A guide rod (11) is movably mounted on the guide block (10). One end of the guide rod (11) is fixedly mounted on the pressure block (8). A spring (12) is sleeved on the guide rod (11) to drive the pressure block (8) to move away from the guide block (10). 2) A base (15) is fixedly provided on the rotary disk (2). A wedge block (16) is movably provided on the side of the base (15) facing the workpiece. The pressure block (8) is fixedly provided on the end face of the wedge block (16) facing the workpiece. The spring (12) is located above the wedge block (16) and abuts against the wedge block (16). A certain gap is left between the guide rod (11) and the wedge block (16). The machine tool is provided with a push rod (17) for driving the wedge block (16) to move in the direction of the spring (12).

2. The rotating workpiece axial positioning and clamping device according to claim 1, characterized in that, The nozzles (6) are evenly distributed on the end face of the fluid pressure plate (5) facing the main shaft (1).

3. The axial positioning and clamping device for a rotating workpiece according to claim 1, characterized in that, The rotating disk (2) is a suction cup, and the radial positioning device (4) includes multiple pressure blocks (8) arranged on the outer periphery of the workpiece.

4. The rotating workpiece axial positioning and clamping device according to claim 1, characterized in that, The drive mechanism (9) is a cylinder or a hydraulic cylinder.

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