A ring clamp

Abstract

The application discloses a kind of circular ring piece clamping devices, it is related to mechanical tooling jig technical field.The device includes mandrel, double-face eccentric cam, slide column, pressing plate and lateral clamping assembly.Double-face eccentric cam rotation is set on mandrel, slide column is as driven member and its two sides are attached;Pressing plate is hinged on mandrel, and slide column pushes pressing plate to rotate around shaft to lock the up-down direction of workpiece;Lateral clamping assembly is horizontally clamped to workpiece.The application utilizes eccentric cam stroke difference to quickly realize compression and release, cooperate reset spring automatic rebound, and limit workpiece deviation and shaking through up-down, left-right two-way limiting.The device is stable, accurate positioning, quick operation, effectively solve the problem of traditional tooling eccentric and low efficiency, suitable for circular ring piece batch and precision machining.

Description

Technical Field

[0001] This invention belongs to the field of mechanical tooling and fixture technology. It is specifically applied to the precise positioning and clamping operations of processes such as inner wall slots, milling inner holes, and milling end faces of annular parts. It can be adapted to batch production and single-piece precision machining in workshops and has strong versatility and practicality. Background Technology

[0002] Currently, traditional bolt clamping structures are mostly used for operations such as slotting of ring-shaped parts. This structure is cumbersome to operate, relying heavily on manual tightening of bolts to adjust the clamping force, resulting in low clamping and disassembly efficiency and an inability to quickly switch between clamping states. Furthermore, traditional structures cannot automatically reset, making them prone to problems such as offset, wobbling, and eccentricity during operation. This leads to poor positioning accuracy and easily causes machining errors and workpiece damage from impacts, seriously affecting the machining accuracy and production efficiency of rings. Summary of the Invention

[0003] The purpose of this invention is to provide a ring clamping device, which optimizes the design to address the shortcomings of existing tooling. The core of the device adopts a double-sided eccentric cam clamping structure and a lateral auxiliary positioning structure to achieve precise fixation of the ring workpiece from all directions.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a ring clamping device, wherein the workpiece pressure plate is in contact with a double-sided eccentric cam via connecting bolts. Utilizing the stroke difference generated by the rotation of the eccentric cam, the vertical lifting stroke of the pressure plate is precisely adjusted, quickly switching between the clamping and loosening states of the workpiece. The pressure plate is equipped with a return spring; after the cam releases the external force, the spring force allows the pressure plate to automatically spring back to its original position, eliminating the need for manual adjustment and simplifying the operation process. Furthermore, a dedicated clamping device is added to the side of the device to clamp and limit the ring workpiece from the side, forming a bidirectional limit with the top cam clamping structure, completely restricting the ring workpiece's offset, rotation, and wobbling freedom.

[0005] The beneficial effects of this invention are as follows: By using both upper and lower clamping and lateral bidirectional clamping and positioning, the problems of eccentricity, wobbling, and displacement of traditional tooling ring parts are completely solved. The tooling exhibits strong clamping stability and significantly improved positioning accuracy, effectively reducing machining deviations and ensuring product processing quality. Simultaneously, clamping and releasing can be quickly completed by rotating and adjusting the double-sided eccentric cam, and with the automatic spring reset function, clamping and disassembly speeds are fast, greatly improving work efficiency and making it suitable for batch production operations. The device has a compact overall structure, low failure rate, and uniform and controllable clamping force, and can be used for workpiece clamping in slotting machines, CNC machining centers, and other equipment. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0007] Figure 2 This is a structural diagram of the present invention;

[0008] Figure 3 This is a schematic diagram of the clamping process for machining parts.

[0009] Explanation of reference numerals in the attached figures:

[0010] 1-Handle; 2-Reset spring; 3-Spring spindle fixing bolt; 4-Spring pressure plate fixing bolt; 5-Clamping screw; 6-Pressure plate rotating shaft; 7-Pressure plate; 8-Processed part; 9-Spindle; 10-Slide column; 11-Double-sided eccentric cam; 12-Bearing; 13-Nut; 14-Handle; 15-Fixing block; 16-Positioning block. Detailed Implementation

[0011] A ring clamping device includes a mandrel (9), a double-sided eccentric cam (11), a slide column (10), a pressure plate (7), and a lateral clamping assembly. The double-sided eccentric cam (11) is rotatably mounted on the mandrel (9), and the slide column (10) acts as a follower and is in contact with both sides of the double-sided eccentric cam (11). The pressure plate (7) is hinged to the mandrel (9) via a rotating shaft (6), and the slide column (10) is used to push the pressure plate (7) to rotate and swing around the rotating shaft (6) to achieve locking and positioning of the workpiece (8) in the vertical direction. The lateral clamping assembly is disposed on the side of the mandrel (9) and is used to clamp and position the workpiece (8) in the horizontal direction.

[0012] Includes a return spring (2), which is fixedly connected to the spindle (9) and the pressure plate (7) respectively, and is used to make the pressure plate (7) automatically spring back to reset after the external force is released by the double-sided eccentric cam (11).

[0013] The reset spring (2) is fixed to the spindle (9) by the spring spindle fixing bolt (3) and fixed to the pressure plate (7) by the spring pressure plate fixing bolt (4).

[0014] The double-sided eccentric cam (11) is supported on the spindle (9) by a bearing (12). A handle (1) is connected to the top of the double-sided eccentric cam (11), and the handle (1) is fixed by a nut (13).

[0015] The clamping screw (5) is used to clamp the sliding column (10) and drive the pressure plate (7) to move.

[0016] The lateral clamping assembly includes a handle (14), a fixing block (15), and a positioning block (16); the fixing block (15) is used to support and constrain the running direction of the handle (14), and the forward and backward movement of the handle (14) drives the positioning block (16) to perform lateral clamping and limiting on the processed part (8).

[0017] The upper part of the mandrel (9) has a slot for the cutting tool to advance and retract.

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] like Figures 1 to 3 As shown, this embodiment provides a ring clamping device. The specific implementation steps are as follows:

[0020] First, turn handle 1 to Figure 1 With the pressure plate 7 released as shown, place the workpiece 8 into the corresponding position on the mandrel 9. Then rotate the handle 1, causing the double-sided eccentric cam 11 to rotate around the mandrel 9. Figure 3 Position: The double-sided eccentric cam 11 has smooth arc-shaped curved surfaces on both sides, and the height difference of the curved surfaces forms the lifting stroke. During rotation, the two curved surfaces will synchronously push the sliding columns 10 that they are attached to extend outward, push the clamping screw 5, and drive the pressure plate 7 to rotate along the pressure plate rotation axis 6, so that the pressure plate 7 firmly locks the workpiece and prevents the workpiece from shifting in the vertical direction. After the workpiece 8 is clamped, the handle 14 is turned. The handle 14, through the fixing block 15, ensures that the screw moves forward and backward along the horizontal axis, preventing the screw from deviating or shaking during the tightening process, so that the thrust is accurately applied to the positioning block 16, ensuring that the lateral clamping force is in the correct direction, and clamping and positioning the workpiece 8 in the horizontal direction. The slot on the upper part of the mandrel 9 allows the slotting tool of the slotting machine to perform slotting on the workpiece 8, which facilitates tool retraction and multiple feed operations to achieve the corresponding dimensional requirements.

[0021] After machining part 8 is completed, rotate handle 1 to position the double-sided eccentric cam 11. Figure 1 In the state shown, part 8 can be removed for processing the next workpiece. Throughout the process, the pressure plate 7 is fixed by the return spring 2 in both clamping and releasing states to prevent it from rotating randomly.

Claims

1. A ring clamping device, characterized in that, The assembly includes a mandrel (9), a double-sided eccentric cam (11), a slide column (10), a pressure plate (7), and a lateral clamping assembly. The double-sided eccentric cam (11) is rotatably mounted on the mandrel (9), and the slide column (10) acts as a follower and is in contact with both sides of the double-sided eccentric cam (11). The pressure plate (7) is hinged to the mandrel (9) via a rotating shaft (6), and the slide column (10) is used to push the pressure plate (7) to rotate and swing around the rotating shaft (6) to achieve locking and positioning of the workpiece (8) in the vertical direction. The lateral clamping assembly is located on the side of the mandrel (9) and is used to clamp and position the workpiece (8) in the horizontal direction.

2. The ring clamping device according to claim 1, characterized in that: It also includes a return spring (2), which is fixedly connected to the spindle (9) and the pressure plate (7) respectively, and is used to make the pressure plate (7) automatically spring back to reset after the external force is released by the double-sided eccentric cam (11).

3. The ring clamping device according to claim 2, characterized in that: The reset spring (2) is fixed to the spindle (9) by the spring spindle fixing bolt (3) and fixed to the pressure plate (7) by the spring pressure plate fixing bolt (4).

4. The ring clamping device according to claim 1, characterized in that: The double-sided eccentric cam (11) is supported on the spindle (9) by a bearing (12). A handle (1) is connected to the top of the double-sided eccentric cam (11), and the handle (1) is fixed by a nut (13).

5. A ring clamping device according to claim 1, characterized in that: The clamping screw (5) is used to clamp the sliding column (10) and drive the pressure plate (7) to move.

6. A ring clamping device according to claim 1, characterized in that: The lateral clamping assembly includes a handle (14), a fixing block (15), and a positioning block (16); the fixing block (15) is used to support and constrain the running direction of the handle (14), and the forward and backward movement of the handle (14) drives the positioning block (16) to perform lateral clamping and limiting on the processed part (8).

7. A ring clamping device according to claim 1, characterized in that: The upper part of the mandrel (9) has a slot for the cutting tool to advance and retract.

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