Polishing device for piston rod machining

Abstract

The utility model discloses a grinding device for piston rod machining, and belongs to the field of electromagnetic valves. The grinding device comprises a base and a fixing structure arranged on the base and used for fixing an electromagnetic valve piston rod; the fixed structure comprises a fixed support plate, a first tip which is rotationally inserted into the fixed support plate, and a first motor which is fixedly mounted on the fixed support plate and is used for driving the first tip to rotate; the fixing structure further comprises a movable supporting plate, a three-jaw chuck and a jacking mechanism, wherein the three-jaw chuck is rotationally connected to the movable supporting plate in an inserted mode, and the jacking mechanism is arranged on the three-jaw chuck and used for being matched with the first tip. Through the design of the fixing structure, the mode of clamping through two tips or the mode of clamping through cooperation of a three-jaw chuck and the tips can be flexibly selected according to the requirement of the piston rod during grinding, and the multifunctionality of clamping of the piston rod is greatly improved. Stable clamping can be achieved without forming grooves in the two ends of the piston rod, and particularly, a more reliable clamping scheme is provided for the piston rod which is not provided with grooves.

Description

Technical Field

[0001] This application relates to the field of solenoid valve technology, specifically a grinding device for processing piston rods. Background Technology

[0002] As a key component in automated control systems, the surface quality of the internal piston rod of a solenoid valve significantly impacts its performance and lifespan. Therefore, polishing the outer wall of the piston rod is a crucial process in the production of solenoid valves. Currently, various solenoid valve piston rod polishing devices are available on the market. Among them, Chinese utility model patent CN221248317U discloses a solenoid valve piston rod polishing device (202322763830.7). This device, through the arrangement of a power frame, power unit, polishing wheel, slide rail groove, track wood, threaded hole, threaded rod, second servo motor, first servo motor, support plate, hydraulic push rod, and clamping cone, achieves the clamping, positioning, and mechanical rotation of the piston rod. Simultaneously, the power unit drives the polishing wheel to rotate, achieving automatic polishing and grinding of the piston rod. In addition, the device is equipped with components such as a receiving port, drawer slots, and protective cover collection boxes to block and collect the dust generated during grinding, effectively preventing dust from falling to the outside and being absorbed by workers, thereby maintaining the cleanliness of the processing workshop environment and ensuring the safety of workers during processing.

[0003] However, while the device has achieved some success in polishing the solenoid valve piston rod, it still has shortcomings in the method of fixing the piston rod. Specifically, the device can only use a center clamping method to fix the piston rod during grinding. This method requires grooves to be made at both ends of the piston rod to match the centers, preventing the piston rod from detaching from the centers during grinding. However, this method of fixing the piston rod is too simplistic and lacks flexibility. When fixing a piston rod without grooves, the inability to form an effective clamping force can easily cause the piston rod to detach from the centers during grinding, leading to safety accidents and affecting processing efficiency and product quality.

[0004] Therefore, this application provides a grinding apparatus for piston rod processing to solve the above-mentioned problems. Utility Model Content

[0005] This application provides a grinding device for piston rod processing, which aims to solve the problems mentioned in the background art, such as the inability to form an effective clamping force when fixing an ungrooved piston rod, which easily causes the piston rod to detach from the two centers during the grinding process, thereby causing safety accidents, affecting processing efficiency and product quality.

[0006] To achieve the above objectives, this application provides the following technical solution: a grinding device for piston rod processing, comprising a base and a fixing structure disposed on the base for fixing a solenoid valve piston rod; differing from conventional piston rod grinding devices, the fixing structure includes a fixed support plate, a first tip rotatably inserted into the fixed support plate, and a first motor fixedly mounted on the fixed support plate for driving the first tip to rotate; the fixing structure further includes a movable support plate, a three-jaw chuck rotatably inserted into the movable support plate, and a top-holding mechanism disposed on the three-jaw chuck for matching the first tip; during the piston rod clamping process, a suitable clamping method is first selected according to the type of piston rod and grinding requirements. Then, the piston rod is placed in the fixing structure, and stable clamping of the piston rod is achieved by adjusting the movable support plate and tightening the three-jaw chuck. Next, the first motor is started to drive the first tip to rotate, and the grinding wheel is turned on to grind the outer wall of the piston rod. During the grinding process, the position and speed of the grinding wheel can be adjusted as needed to obtain the best grinding effect. The holding mechanism includes a fixed sleeve fixedly disposed at the end of the three-jaw chuck away from the first tip, a limiting plate disposed within the fixed sleeve, a second tip inserted into the fixed sleeve and fixedly connected to the limiting plate, and a spring disposed within the fixed sleeve at the end of the limiting plate away from the second tip. Through the cooperation of the first and second tips, and the clamping of the piston rod end by the three-jaw chuck, multiple clamping methods for the piston rod are achieved, meeting the grinding requirements of different types of piston rods.

[0007] Preferably, a first bearing is provided between the first tip and the fixed support plate, and a second bearing is provided between the second tip and the movable support plate.

[0008] Preferably, to facilitate adjustment of the position of the movable support plate: the base is provided with an adjustment structure for adjusting the position of the movable support plate. The adjustment structure includes a guide frame plate fitted onto the movable support plate, a drive screw threaded onto the movable support plate and rotatably connected to the guide frame plate, and a second motor fixedly mounted on the guide frame plate for driving the drive screw to rotate. The fixed support plate is fixed to one end of the guide frame plate. By driving the drive screw to rotate via the second motor, precise adjustment of the position of the movable support plate can be achieved, meeting the requirements for different clamping positions of the piston rod. The design of the adjustment structure makes adjusting the position of the movable support plate simple and quick, reducing operational difficulty and labor intensity.

[0009] Preferably, to facilitate the movement of the piston rod towards the grinding wheel: the base is provided with a drive structure for driving the guide frame plate to rotate circumferentially. The drive structure includes two support plates symmetrically fixed on the base, a hinge plate hinged to the inner side of the support plates and fixedly connected to the lower end of the guide frame plate, and a worm gear assembly fixedly mounted on one of the support plates. The worm gear shaft of the worm gear assembly is fixedly connected to the hinge shaft of the hinge plate. The drive structure allows for circumferential adjustment of the guide frame plate, facilitating the movement of the piston rod fixed on the guide frame plate towards or away from the grinding wheel, thereby facilitating the grinding of the outer wall of the piston rod. The design of the drive structure makes adjusting the position of the piston rod simple and quick, reducing operational difficulty and labor intensity.

[0010] Preferably, the worm shaft of the worm gear combination is fixedly connected to a handwheel.

[0011] This application, through its fixed structure design, allows for flexible selection of two-center clamping or a three-jaw chuck with centers for clamping, depending on the needs of the piston rod during grinding, greatly improving the versatility of piston rod clamping. Stable clamping can be achieved without creating grooves at both ends of the piston rod, providing a more reliable clamping solution, especially for ungrooved piston rods. The first motor drives the first center to rotate, combined with the grinding wheel, enabling efficient grinding of the piston rod's outer wall. The stable clamping method ensures safety during the grinding process, preventing accidents caused by the piston rod falling off.

[0012] This application utilizes a second motor to drive the lead screw, enabling precise adjustment of the movable support plate's position and meeting the requirements for different clamping positions of the piston rod. The design of the adjustment structure simplifies and speeds up the adjustment of the movable support plate's position, reducing operational difficulty and labor intensity. The guide frame provides stable guidance for the movement of the movable support plate, ensuring stability and reliability during the adjustment process.

[0013] This application utilizes a drive structure to circumferentially adjust the guide frame plate, facilitating the movement of the piston rod fixed to the guide frame plate towards or away from the grinding wheel, thereby simplifying the grinding of the piston rod's outer wall. The drive structure design simplifies and speeds up piston rod position adjustment, reducing operational difficulty and labor intensity. The support plate and hinge plate design provide stable support and guidance for the movement of the guide frame plate and piston rod, ensuring stability and reliability during the adjustment process. Attached Figure Description

[0014] Figure 1 A schematic diagram of a grinding device for processing piston rods;

[0015] Figure 2 for Figure 1 A schematic diagram of the other side of the structure;

[0016] Figure 3 for Figure 1 Top view of the structure in the image;

[0017] Figure 4 This is a cross-sectional view of the supporting mechanism.

[0018] In the picture:

[0019] 1. Base; 2. Fixing structure; 21. Fixing support plate; 211. First bearing; 22. First center; 23. First motor; 24. Movable support plate; 241. Second bearing; 25. Three-jaw chuck; 26. Supporting mechanism; 261. Fixing sleeve; 262. Limiting plate; 263. Second center; 264. Spring; 3. Adjusting structure; 31. Guide frame plate; 32. Drive screw; 33. Second motor; 4. Drive structure; 41. Support plate; 42. Hinge plate; 43. Worm gear combination; 431. Handwheel. Detailed Implementation

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

[0021] Example 1

[0022] This embodiment provides a grinding device for piston rod machining, such as... Figure 1-4 As shown, the grinding device includes a base 1 and a fixing structure 2 disposed on the base 1 for fixing the solenoid valve piston rod;

[0023] Unlike traditional piston rod grinding devices, the fixed structure 2 includes a fixed support plate 21, a first center 22 rotatably inserted into the fixed support plate 21, and a first motor 23 fixedly mounted on the fixed support plate 21 to drive the first center 22 to rotate. The fixed structure 2 also includes a movable support plate 24, a three-jaw chuck 25 rotatably inserted into the movable support plate 24, and a support mechanism 26 mounted on the three-jaw chuck 25 to match the first center 22. Through the design of the fixed structure 2, the clamping method can be flexibly selected according to the needs of piston rod grinding, either by clamping with two centers or by clamping with the three-jaw chuck 25 and the centers, greatly improving the versatility of piston rod clamping. Stable clamping can be achieved without creating grooves at both ends of the piston rod, providing a more reliable clamping solution, especially for ungrooved piston rods. The first motor 23 drives the first center 22 to rotate, combined with the grinding wheel, to achieve efficient grinding of the outer wall of the piston rod. The stable clamping method ensures safety during the grinding process, avoiding accidents caused by the piston rod falling off. During the piston rod clamping process, a suitable clamping method is first selected based on the piston rod type and grinding requirements. Then, the piston rod is placed in the fixed structure 2, and stable clamping is achieved by adjusting the movable support plate 24 and tightening the three-jaw chuck 25. Next, the first motor 23 is started to drive the first center 22 to rotate, and the grinding wheel is activated to grind the outer wall of the piston rod. During grinding, the position and speed of the grinding wheel can be adjusted as needed to obtain the best grinding effect.

[0024] In use, when it is necessary to clamp both ends of the piston rod with the center, firstly, one end of the piston rod is brought into contact with the first center 22, and the holding mechanism 26 is fixed by the three-jaw chuck 25. Then, by moving the movable support plate 24, the holding mechanism 26 on it is brought into contact with the other end of the piston rod, so that the ends of the first center 22 and the holding mechanism 26 are respectively inserted into the grooves at the end of the piston rod, thereby making the piston rod stably placed between the first center 22 and the holding mechanism 26. When it is necessary to clamp the end of the piston rod, firstly... One end of the piston rod is brought into contact with the first tip 22. Then, the movable support plate 24 is moved so that the holding mechanism 26 on the movable support plate 24 comes into contact with the other end of the piston rod. The movable support plate 24 is then moved further so that the holding mechanism 26 moves into the three-jaw chuck 25 under the pressure of the piston rod, until the end of the piston rod is inserted into the three-jaw chuck 25. The movable support plate 24 is then stopped, and the end of the piston rod is stably placed on the three-jaw chuck 25 by tightening it, ensuring the stability of the piston rod clamping. The outer wall of the piston rod can then be ground with a grinding wheel.

[0025] The holding mechanism 26 includes a fixed sleeve 261 fixedly disposed at the end of the three-jaw chuck 25 away from the first tip 22, a limiting plate 262 disposed within the fixed sleeve 261, a second tip 263 inserted into the fixed sleeve 261 and fixedly connected to the limiting plate 262, and a spring 264 disposed within the fixed sleeve 261 at the end of the fixed sleeve 261 away from the limiting plate 262 and the second tip 263. Through the cooperation of the first tip 22 and the second tip 263, and the clamping of the piston rod end by the three-jaw chuck 25, multiple clamping methods for the piston rod are achieved, meeting the grinding requirements of different types of piston rods. In the two-tip clamping method, the second tip 263 is fixed in position by the three-jaw chuck 25, effectively preventing axial movement and ensuring clamping stability. When clamping both ends of the piston rod with the center, the piston rod can be clamped by the cooperation of the first center 22 and the second center 263. During this process, the second center 263 is fixed in position by the three-jaw chuck 25 to prevent the second center 263 from moving axially. When clamping the end of the piston rod, when the piston rod pushes the second center 263 to move into the fixed sleeve 261, the second center 263 drives the limiting plate 262 to compress the spring 264 to retract and store force. Then, by tightening the three-jaw chuck 25, the end of the piston rod is stably placed on the three-jaw chuck 25 to ensure the stability of the piston rod clamping.

[0026] Specifically, a first bearing 211 is provided between the first tip 22 and the fixed support plate 21, and a second bearing 241 is provided between the second tip 263 and the movable support plate 24.

[0027] To facilitate the adjustment of the position of the movable support plate 24, the base 1 is equipped with an adjustment structure 3 for adjusting the position of the movable support plate 24. The adjustment structure 3 includes a guide frame plate 31 fitted onto the movable support plate 24, a drive screw 32 threaded into the movable support plate 24 and rotatably connected to the guide frame plate 31, and a second motor 33 fixedly mounted on the guide frame plate 31 to drive the drive screw 32. The fixed support plate 21 is fixed to one end of the guide frame plate 31. By driving the drive screw 32 to rotate via the second motor 33, precise adjustment of the position of the movable support plate 24 can be achieved, meeting the requirements for different clamping positions of the piston rod. The design of the adjustment structure 3 makes adjusting the position of the movable support plate 24 simple and quick, reducing operational difficulty and labor intensity. The guide frame plate 31 provides stable guidance for the movement of the movable support plate 24, ensuring stability and reliability during the adjustment process. When the position of the movable support plate 24 needs to be adjusted, the second motor 33 is first started, causing it to drive the drive screw 32 to rotate. Since the movable support plate 24 is threadedly connected to the drive screw 32, it moves axially under the guidance of the guide frame plate 31 as the drive screw 32 rotates. Precise control of the moving direction and speed of the movable support plate 24 can be achieved by controlling the direction and speed of the second motor 33. When the movable support plate 24 moves to the desired position, the rotation of the second motor 33 stops. At this time, the top holding mechanism 26 on the movable support plate 24 can cooperate with the first center point 22 on the fixed support plate 21 to clamp and fix the piston rod. During clamping, a suitable clamping method can be selected according to the type of piston rod and grinding requirements, such as clamping with two centers or clamping with a three-jaw chuck 25 and the centers.

[0028] Example 2

[0029] Unlike Embodiment 1, to facilitate the movement of the piston rod towards the grinding wheel, a drive structure 4 for driving the guide frame plate 31 to rotate circumferentially is provided on the base 1. The drive structure 4 includes two support plates 41 symmetrically fixed on the base 1, a hinge plate 42 hinged to the inner side of the support plates 41 and fixedly connected to the lower end of the guide frame plate 31, and a worm gear assembly 43 fixedly mounted on one of the support plates 41. The worm gear shaft of the worm gear assembly 43 is fixedly connected to the hinge shaft of the hinge plate 42. The drive structure 4 allows for circumferential adjustment of the guide frame plate 31, facilitating the movement of the piston rod fixed on the guide frame plate 31 towards or away from the grinding wheel, thereby facilitating the grinding of the outer wall of the piston rod. The design of the drive structure 4 simplifies and speeds up the adjustment of the piston rod position, reducing operational difficulty and labor intensity. The design of the support plates 41 and the hinge plate 42 provides stable support and guidance for the movement of the guide frame plate 31 and the piston rod, ensuring stability and reliability during the adjustment process. The design of the drive structure 4 allows it to be adapted to piston rods of different lengths and diameters, improving the versatility and adaptability of the device. When circumferential adjustment of the piston rod position is required, the worm gear combination 43 is first activated, driving the hinge plate 42 to rotate hingedly around the support plate 41. Since the hinge plate 42 is fixedly connected to the lower end of the guide frame plate 31, the guide frame plate 31 and the piston rod fixed thereon will also undergo corresponding circumferential adjustment as the hinge plate 42 rotates. By controlling the direction and speed of the worm gear combination 43, precise control of the piston rod's movement direction and speed can be achieved. During the grinding process, the worm gear combination 43 can be set to rotate in the forward direction, causing the piston rod to move closer to the grinding wheel until it contacts the grinding wheel and grinding begins. After the piston rod is ground, the worm gear combination 43 is driven in the reverse direction, causing the piston rod to move away from the grinding wheel, thus completing the entire grinding process.

[0030] The worm shaft of the worm gear combiner 43 is fixedly connected to a handwheel 431. The handwheel 431 allows the worm gear combiner 43 to be easily driven to rotate the hinge plate 42 around the support plate 41, thereby enabling the piston rod to rotate circumferentially and move the piston rod closer to the grinding wheel.

[0031] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A grinding device for processing piston rods, comprising a base (1) and a fixing structure (2) disposed on the base (1) for fixing a solenoid valve piston rod; Its features are: The fixed structure (2) includes a fixed support plate (21), a first tip (22) rotatably inserted into the fixed support plate (21), and a first motor (23) fixedly installed on the fixed support plate (21) for driving the first tip (22) to rotate; the fixed structure (2) also includes a movable support plate (24), a three-jaw chuck (25) rotatably inserted into the movable support plate (24), and a top holding mechanism (26) provided on the three-jaw chuck (25) for matching the first tip (22); The top holding mechanism (26) includes a fixed sleeve (261) fixedly disposed at one end of the three-jaw chuck (25) away from the first tip (22), a limiting plate (262) disposed in the fixed sleeve (261), a second tip (263) inserted into the fixed sleeve (261) and fixedly connected to the limiting plate (262), and a spring (264) disposed in the fixed sleeve (261) at one end of the limiting plate (262) away from the second tip (263).

2. The grinding device for piston rod processing according to claim 1, characterized in that: A first bearing (211) is provided between the first tip (22) and the fixed support plate (21), and a second bearing (241) is provided between the second tip (263) and the movable support plate (24).

3. The grinding device for piston rod processing according to claim 1, characterized in that: The base (1) is provided with an adjustment structure (3) for adjusting the position of the movable support plate (24). The adjustment structure (3) includes a guide frame plate (31) fitted on the movable support plate (24), a drive screw (32) threaded into the movable support plate (24) and rotatably connected to the guide frame plate (31), and a second motor (33) fixedly installed on the guide frame plate (31) for driving the drive screw (32) to rotate. The fixed support plate (21) is fixed to one end of the guide frame plate (31).

4. The grinding device for piston rod processing according to claim 3, characterized in that: The base (1) is provided with a drive structure (4) for driving the guide frame plate (31) to rotate circumferentially. The drive structure (4) includes two support plates (41) symmetrically fixed on the base (1), a hinge plate (42) hinged to the inner side of the support plate (41) and fixedly connected to the lower end of the guide frame plate (31), and a worm gear assembly (43) fixedly installed on one of the support plates (41). The worm gear shaft of the worm gear assembly (43) is fixedly connected to the hinge shaft of the hinge plate (42).

5. The grinding device for piston rod processing according to claim 4, characterized in that: The worm shaft of the worm gear assembly (43) is fixedly connected to a handwheel (431).

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