A piston ring clamping device capable of realizing multi-station synchronous coating

Abstract

The utility model discloses a kind of piston ring clamping devices that can realize multi-station synchronous coating, including fixture base and vertical rod, the vertical rod is vertically fixed on fixture base, forming main support structure;Vertical rod is provided with tray, rotatingly connected with rotary worm wheel on tray, fixedly provided with positioning ring on tray, positioning ring is evenly provided with radial guide slot on circumference, and clamping station is arranged at radial guide slot;Clamping station includes movable block, limit block, spring and contact head, movable block is slidably inserted on radial guide slot, limit block is fixedly connected on one side of movable block, and spring is arranged between movable block and radial guide slot;The utility model is intermittently rotated by worm gear drive mechanism, combined with radial clamping station by spring to provide flexible pressure, realize periodic rotation and low stress, small area clamping of piston ring in coating process, to ensure that film layer thickness is uniform, eliminate shadow area.

Description

Technical Field

[0001] This utility model relates to the technical field of piston ring processing devices, specifically a piston ring clamping device that can achieve multi-station synchronous coating. Background Technology

[0002] In piston ring surface treatment processes, physical vapor deposition and other coating technologies are widely used to improve their wear resistance and corrosion resistance. In this process, a large number of piston rings need to be loaded onto special fixtures and placed into a coating furnace for batch processing. Currently, the industry mainly uses two methods for clamping piston rings for coating: one is a simple rod-shaped or columnar fixture to string the piston rings one by one; the other is to use a multi-station pallet fixture that can load multiple piston rings at the same time to improve the loading capacity and work efficiency of a single coating.

[0003] However, existing multi-station clamping devices have significant specific problems in practical applications: micro-deformation of piston rings under clamping conditions and coating masking. Specifically, in order to fix piston rings, the fixture is usually designed with multiple rigid clamping points. Since the piston ring itself is an elastic thin-walled part with an opening, the rigid clamping force acts on several specific positions of the ring body, which can easily cause a slight change in its roundness and produce clamping deformation. This micro-deformation is fatal in the coating process, which will lead to uneven deposition thickness of the film layer at different positions of the ring body. In particular, there is a significant difference between the area near the clamping point and the non-clamping area, which seriously affects the consistency of the coating quality of the product. Utility Model Content

[0004] The purpose of this invention is to provide a piston ring clamping device that can achieve synchronous coating at multiple stations, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a piston ring clamping device that can realize multi-station synchronous coating, including a clamping base and a vertical rod, wherein the vertical rod is vertically fixed on the clamping base to form a main support structure;

[0006] The upright is equipped with a tray, a rotating worm gear is rotatably connected to the tray, a positioning ring is fixedly installed on the tray, radial guide grooves are evenly arranged in the circumferential direction of the positioning ring, and a clamping station is provided at the radial guide groove.

[0007] The clamping station includes a movable block, a limiting block, a spring, and a contact head. The movable block is slidably inserted into the radial guide groove, the limiting block is fixedly connected to one side of the movable block, a spring is provided between the movable block and the radial guide groove, and the contact head is fixedly connected to the end of the movable block.

[0008] Preferably, the fixture base is provided with a rotary drive mechanism and a support plate. The rotary drive mechanism includes a drive motor, a transmission worm gear driven by the drive motor, and a rotary worm wheel meshing with the transmission worm gear.

[0009] Preferably, the drive motor is fixedly installed on one side of the support plate, and the output end of the drive motor is fixedly connected to the transmission worm gear.

[0010] Preferably, positioning frames are provided on both the left and right sides of the tray, and the positioning frames on the left and right sides form a positioning for the upper and lower sides of the rotating worm gear.

[0011] Preferably, the inner side of the rotating worm gear is provided with a toggle block, the end of the toggle block has an inclined surface structure and corresponds one-to-one with the movable block, and the other end of the movable block has an inclined surface structure.

[0012] Preferably, the outer side of the positioning ring is provided with a stop to prevent the toggle block from dislodging.

[0013] Preferably, the contact head is a spherical structure made of hard alloy, and the piston ring contacts are in point contact mode.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention utilizes an intermittent rotation mechanism driven by a worm gear and a radial clamping station with flexible pressure provided by a spring to achieve periodic self-rotation of the piston ring during the coating process and low-stress, small-area clamping, thereby ensuring uniform film thickness and eliminating shadow areas. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the piston ring clamping device of this utility model, which enables simultaneous coating at multiple workstations.

[0017] Figure 2 This is a schematic diagram of the structure of the tray of this utility model.

[0018] Figure 3 This is a schematic diagram of the clamping station of this utility model.

[0019] In the diagram: 1-Clamping base; 2-Upright pole; 3-Pattern; 31-Rotating worm gear; 32-Transmission worm; 33-Supporting plate; 34-Drive motor; 35-Toggle block; 36-Positioning frame; 4-Positioning ring; 41-Stop block; 5-Clamping station; 51-Moving block; 52-Limiting block; 53-Spring; 54-Contact head. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1 to 3 The present invention provides a technical solution: a piston ring clamping device that can realize multi-station synchronous coating provided by the embodiment of the present invention includes a clamping base 1 and a vertical rod 2. The vertical rod 2 is vertically installed at the center of the upper surface of the clamping base 1 by welding. The two together constitute the rigid main support structure of the entire device.

[0022] A tray 3 is coaxially fixed on the upright 2. A rotating worm gear 31 is rotatably connected to the tray 3. The bottom of the rotating worm gear 31 is embedded in the predetermined annular groove of the tray 3. An annular positioning ring 4 is fixed on the tray 3 by welding. Multiple radial guide grooves are evenly opened in the circumference of the positioning ring 4.

[0023] A rotary drive mechanism is provided on the fixture base 1. A support plate 33 is fixed to the fixture base 1 by welding. The rotary drive mechanism includes a drive motor 34, a transmission worm 32, and a rotary worm wheel 31. The drive motor 34 is fixedly installed on one side of the support plate 33 by bolts. The output shaft of the drive motor 34 is fixedly connected to one end of the transmission worm 32 by a coupling. The other end of the transmission worm 32 is rotatably supported on the support plate 33 on the other side by a bearing. The rotary worm wheel 31 meshes with the transmission worm 32.

[0024] A toggle block 35 is welded to the inner edge of the rotating worm gear 31. The end of the toggle block 35 is machined into an inclined surface structure, and its number corresponds one-to-one with the movable block 51. The end of the movable block 51 located inside the positioning ring 4 is also machined with an inclined surface structure that matches it. The inclined surface of the toggle block 35 and the inclined surface of the movable block 51 interact with each other, converting the rotational motion into the radial linear motion of the movable block 51, thereby realizing multi-station synchronous clamping.

[0025] The drive motor 34 starts, driving the transmission worm 32 to rotate. The transmission worm 32 drives the rotating worm wheel 31 that meshes with it to rotate, which in turn drives the actuating block 35 to rotate.

[0026] Each radial guide groove is provided with a clamping station 5. The clamping station 5 includes a movable block 51, a limiting block 52, a spring 53 and a contact head 54. The movable block 51 is slidably inserted into the radial guide groove and can slide radially along the groove. The limiting block 52 is fixedly connected to one end of the movable block 51 located at the positioning ring 4 to prevent the movable block 51 from completely coming out of the radial guide groove.

[0027] A spring 53 is provided between the movable block 51 and the bottom of the radial guide groove. The spring 53 is a compression spring, with one end pressing against the movable block 51 and the other end pressing against the positioning ring 4, thereby continuously applying a radially inward elastic pressure to the movable block 51. The contact head 54 is fixedly connected to the end of the movable block 51 located outside the positioning ring 4 by a threaded connection.

[0028] When the piston ring is placed in the central area of ​​the positioning ring 4, the end of the actuating block 35 rotates and presses the inclined surface of the movable block 51. As a result, the actuating block 35 moves radially toward the center along the positioning ring 4. The movement of the limiting block 52 compresses the spring 53. The circumferential movable block 51 moves radially inward in sync until the contact head 54 at its end contacts the outer circumferential surface of the piston ring and applies a flexible clamping force. This elastic restoring force provided by the spring avoids the rigid groove from hard squeezing the piston ring. It can adapt to the small dimensional tolerances and roundness errors of the piston ring and effectively prevent roundness distortion caused by multi-point rigid clamping, laying a structural foundation for obtaining a uniform coating thickness in the future.

[0029] Positioning frames 36 are symmetrically fixed on the left and right sides of the tray 3 by bolts. The two positioning frames 36 limit the rim of the rotating worm gear 31 from the top and bottom directions to prevent it from moving axially during rotation and ensure the smoothness of the rotation.

[0030] A stop 41 is welded to the outside of the positioning ring 4. The stop 41 is used to prevent the ejected movable block 51 from displacing too much, and plays a secondary limiting and protection role. The contact head 54 is a spherical structure made of hard alloy. Its contact with the piston ring is a precise point contact. The hard alloy material ensures the wear resistance of the contact head. The spherical design minimizes the contact area with the piston ring, thereby minimizing the coating masking effect and leaving only tiny uncoated spots on the ring surface.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A piston ring clamping device capable of multi-station synchronous coating, comprising a clamping base (1) and a vertical rod (2), characterized in that: The upright (2) is vertically fixed on the clamp base (1) to form the main support structure; The upright (2) is provided with a tray (3), a rotating worm gear (31) is rotatably connected to the tray (3), a positioning ring (4) is fixedly provided on the tray (3), a radial guide groove is evenly provided on the circumference of the positioning ring (4), and a clamping station (5) is provided at the radial guide groove. The clamping station (5) includes a movable block (51), a limiting block (52), a spring (53), and a contact head (54). The movable block (51) is slidably inserted into the radial guide groove, the limiting block (52) is fixedly connected to one side of the movable block (51), the spring (53) is provided between the movable block (51) and the radial guide groove, and the contact head (54) is fixedly connected to the end of the movable block (51).

2. The piston ring clamping device for multi-station synchronous coating as described in claim 1, characterized in that: The fixture base (1) is provided with a rotary drive mechanism and a support plate (33). The rotary drive mechanism includes a drive motor (34), a transmission worm gear (32) driven by the drive motor (34), and a rotary worm wheel (31) meshing with the transmission worm gear (32).

3. The piston ring clamping device for multi-station synchronous coating as described in claim 2, characterized in that: The drive motor (34) is fixedly installed on one side of the support plate (33), and the output end of the drive motor (34) is fixedly connected to the transmission worm (32).

4. The piston ring clamping device for multi-station synchronous coating as described in claim 1, characterized in that: Positioning frames (36) are provided on both the left and right sides of the tray (3), and the positioning frames (36) on the left and right sides form a positioning for the upper and lower sides of the rotating worm gear (31).

5. A piston ring clamping device capable of multi-station synchronous coating according to claim 1, characterized in that: The inner side of the rotating worm gear (31) is provided with a toggle block (35). The end of the toggle block (35) has an inclined surface structure and corresponds one-to-one with the movable block (51). The other end of the movable block (51) has an inclined surface structure.

6. The piston ring clamping device for multi-station synchronous coating according to claim 1, characterized in that: The outer side of the positioning ring (4) is provided with a stop (41) to prevent the toggle block (35) from falling out.

7. A piston ring clamping device capable of multi-station synchronous coating according to claim 1, characterized in that: The contact head (54) is a spherical structure made of hard alloy, and the piston ring contacts in a point contact manner.

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