Multi-station machining tool for valve rod hole of gate valve

Abstract

The utility model discloses a multi-station machining tool for a valve rod hole of a gate valve, relates to the technical field of tools, and aims to solve the problems that a large amount of feeding and discharging time is consumed and the machining efficiency of the valve rod hole of the gate valve is influenced by adopting a single-station machining mode when the valve rod of the gate valve is subjected to hole machining in batches in the prior art. A center column is fixedly installed in the middle of the upper portion of the tool table, station tables are fixedly installed on the outer side of the center column, the number of the station tables is four, the four station tables are located in the four directions of the center column respectively, a clamping mechanism is arranged above each station table, and the number of the clamping mechanisms is two. A motor is fixedly installed in the middle of the lower portion of the tool table, the output end of the motor is fixedly connected with the center column, the clamping mechanism comprises a bottom box, a fixed bottom plate, a back plate, a top plate, a fixed pressing plate and an electric cylinder, and the bottom box is fixedly connected with the station table.

Description

Technical Field

[0001] This utility model relates to the field of tooling technology, specifically to a multi-station machining tooling for gate valve stem holes. Background Technology

[0002] The valve stem of a gate valve is an important component, serving as a key link between the valve actuator and the valve core (gate). The position of the gate is controlled by the up-and-down movement of the valve stem, thus enabling the gate valve to open or close. When the valve stem rises, the gate rises accordingly, opening the fluid passage; when the valve stem descends, the gate comes into tight contact with the valve seat, preventing fluid from passing through and providing a seal. During the processing of the gate valve stem, drilling is required, and the valve stem must be mounted on a tooling fixture to fix its position during drilling.

[0003] For example, the authorized patent with announcement number CN216758229U (a tooling for machining the valve stem hole of a ball valve body) includes a base plate, a clamping and positioning mechanism and a drilling mechanism. The clamping and positioning mechanism is fixedly installed on one side of the upper end of the base plate, and the drilling mechanism is fixedly installed on the other side of the upper end of the base plate. The valve body is clamped in the middle of the clamping and positioning mechanism.

[0004] While the existing technology described above places the valve body on the upper end of the mounting plate and uses a telescopic cylinder to move the pressure plate and protective layer downwards to clamp and fix the valve body, the valve stem is processed in a single-station manner. Consequently, when processing the holes in a batch of gate valve stems, this single-station processing method consumes a significant amount of loading and unloading time, affecting the processing efficiency of the gate valve stem holes. Therefore, there is an urgent market need to develop a multi-station machining fixture for gate valve stem holes to help solve the existing problems. Utility Model Content

[0005] The purpose of this utility model is to provide a multi-station machining fixture for gate valve stem holes, so as to solve the problem mentioned in the background art that when the single-station machining method is used for batch machining of gate valve stem holes, it will consume a lot of loading and unloading time and affect the machining efficiency of gate valve stem holes.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a multi-station machining fixture for gate valve stem holes, comprising a fixture table, a central column fixedly installed in the middle above the fixture table, and four workstations fixedly installed on the outer side of the central column. The four workstations are respectively located at the four positions of the central column. Each workstation is provided with a clamping mechanism above it, and there are two clamping mechanisms. A motor is fixedly installed in the middle below the fixture table, and the output end of the motor is fixedly connected to the central column.

[0007] Preferably, the clamping mechanism includes a base box, a fixed base plate, a back plate, a top plate, a fixed pressure plate, and an electric cylinder, wherein the base box is fixedly connected to the workstation.

[0008] Preferably, the fixed base plate is fixedly installed in the middle of the top of the base box, the back plate is fixedly installed in the middle of the rear end of the base box, the top plate is fixedly installed above the front end of the back plate, the fixed pressure plate is located directly above the fixed base plate, the electric cylinder is fixedly installed above the top plate, and the push rod end of the electric cylinder slides through the top plate and is fixedly connected to the fixed pressure plate.

[0009] Preferably, a fixing bottom groove is provided on the upper end surface of the fixing base plate, and a fixing pressure groove is provided on the lower end surface of the fixing pressure plate.

[0010] Preferably, a translation plate is symmetrically arranged on both sides of the fixed base plate above the base box, and a clamping block is fixedly installed on the inner side of each of the two translation plates. An arc-shaped groove is provided on one end face of the clamping block, and a rubber pad is provided inside the arc-shaped groove, and the rubber pad is bonded to the clamping block.

[0011] Preferably, a ball screw is rotatably installed inside the base box, the threads at both ends of the ball screw are arranged in opposite directions, and sliding blocks are slidably installed at both ends of the ball screw. A connecting plate is fixedly installed above the sliding blocks, and the connecting plate is fixedly connected to the translation plate. A motor box is fixedly installed on one side of the base box.

[0012] Preferably, a guide rod is fixedly installed inside the base box along the lower part of the ball screw, and guide plates are symmetrically slidably installed at both ends of the outer side of the guide rod, and the guide plates are fixedly connected to the sliding block.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) This utility model drives the four workstations to rotate through the central column, realizing seamless switching between workstations. This allows the other workstations to perform loading and unloading operations while the gate valve stem hole is being processed at one workstation, thus ensuring continuous operation of the drilling device and avoiding the efficiency bottleneck caused by frequent loading and unloading in single-workstation processing. This design not only improves the processing efficiency of the gate valve stem hole, but also facilitates batch processing and enhances practicality.

[0015] (2) The present invention, through the design of the clamping mechanism, through the combination of a fixed base plate, a fixed pressure plate and an electric cylinder, places the lower end of the gate valve stem in the fixed bottom groove of the fixed base plate, and then drives the fixed pressure plate to move down to vertically clamp the gate valve stem, thereby ensuring the stability and safety of the gate valve stem during the processing, reducing processing errors caused by unstable clamping, and improving processing quality.

[0016] (3) By setting up translation plates and clamping blocks, the gate valve stem can be clamped horizontally by driving the two translation plates to move closer to each other when clamping the gate valve stem. The arc-shaped groove and the rubber pad inside not only increase the clamping area and improve the clamping stability, but also protect the surface of the gate valve stem from damage through the elastic buffering effect of the rubber pad, reducing workpiece damage caused by improper clamping and increasing practicality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a multi-station machining fixture for the valve stem hole of a gate valve according to the present invention;

[0018] Figure 2 This is a schematic diagram of the clamping mechanism of this utility model;

[0019] Figure 3 This is a cross-sectional view of the clamping mechanism of this utility model;

[0020] Figure 4 This is a bottom view of the fixing plate of this utility model.

[0021] In the diagram: 1. Tooling table; 2. Central column; 3. Workstation; 4. Clamping mechanism; 5. Base box; 6. Fixed base plate; 601. Fixed bottom groove; 7. Back plate; 8. Top plate; 9. Fixed pressure plate; 901. Fixed pressure groove; 10. Electric cylinder; 11. Motor box; 12. Translation plate; 13. Clamping block; 1301. Arc-shaped groove; 14. Rubber pad; 15. Ball screw; 16. Sliding block; 17. Connecting plate; 18. Guide rod; 19. Guide plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-4 This utility model provides an embodiment of a multi-station machining fixture for gate valve stem holes, including a fixture table 1, a central column 2 fixedly installed in the middle above the fixture table 1, and four workstations 3 fixedly installed on the outer side of the central column 2. The four workstations 3 are respectively located in the four directions of the central column 2. Each workstation 3 is provided with a clamping mechanism 4 above it, and there are two clamping mechanisms 4. A motor is fixedly installed in the middle below the fixture table 1, and the output end of the motor is fixedly connected to the central column 2.

[0024] During the machining of the gate valve stem hole, the central column 2 drives the rotation of four workstations 3, allowing each workstation 3 to move to the drilling position of the gate valve stem. The rotatable arrangement of the four workstations 3 allows for the loading and unloading of gate valve stems on other workstations while one workstation is machining a hole. This enables continuous operation of the gate valve stem drilling device, reducing loading and unloading time, improving the efficiency of gate valve stem hole machining, facilitating batch processing of gate valve stems, and increasing practicality.

[0025] Please see Figure 2 and Figure 4 The clamping mechanism 4 includes a base box 5, a fixed base plate 6, a back plate 7, a top plate 8, a fixed pressure plate 9, and an electric cylinder 10. The base box 5 is fixedly connected to the workstation 3. The fixed base plate 6 is fixedly installed in the middle above the base box 5. The back plate 7 is fixedly installed in the middle of the rear end of the base box 5. The top plate 8 is fixedly installed above the front end of the back plate 7. The fixed pressure plate 9 is located directly above the fixed base plate 6. The electric cylinder 10 is fixedly installed above the top plate 8. The push rod end of the electric cylinder 10 slides through the top plate 8 and is fixedly connected to the fixed pressure plate 9. A fixed bottom groove 601 is provided on the upper end surface of the fixed base plate 6, and a fixed pressure groove 901 is provided on the lower end surface of the fixed pressure plate 9.

[0026] The clamping mechanism 4 is designed by combining the fixed base plate 6, the fixed pressure plate 9 and the electric cylinder 10. By placing the lower end of the gate valve stem in the fixed bottom groove 601 of the fixed base plate 6, and then driving the fixed pressure plate 9 to move down, the gate valve stem is vertically clamped, which ensures the stability and safety of the gate valve stem during the processing, reduces the processing error caused by unstable clamping, and improves the processing quality.

[0027] Please see Figure 2 and Figure 3 A sliding plate 12 is symmetrically arranged on both sides of the fixed base plate 6 above the base box 5. A clamping block 13 is fixedly installed on the inner side of each sliding plate 12. An arc-shaped groove 1301 is provided on one end face of the clamping block 13. A rubber pad 14 is provided inside the arc-shaped groove 1301 and is bonded to the clamping block 13. The gate valve stem is clamped by driving the two sliding plates 12 to move. The arc-shaped groove 1301 improves the clamping stability.

[0028] The arrangement of the translation plate 12 and the clamping block 13 allows the gate valve stem to be clamped horizontally by driving the two translation plates 12 to move closer to each other during clamping. The arc-shaped groove 1301 and the rubber pad 14 inside it not only increase the clamping area and improve the clamping stability, but also protect the surface of the gate valve stem from damage through the elastic buffering effect of the rubber pad 14, reducing workpiece damage caused by improper clamping and increasing practicality.

[0029] Please see Figure 3 Inside the base box 5, a ball screw 15 is rotatably installed. The threads at both ends of the ball screw 15 are arranged in opposite directions. Sliding blocks 16 are slidably installed at both ends of the ball screw 15. A connecting plate 17 is fixedly installed above the sliding block 16. The connecting plate 17 is fixedly connected to the translation plate 12. A motor box 11 is fixedly installed on one side of the base box 5. The motor box 11 is equipped with a drive motor for the ball screw 15. By driving the ball screw 15 to rotate, it is convenient to drive the two translation plates 12 to move and perform the clamping work of the gate valve stem.

[0030] The ball screw 15 is designed to facilitate the movement of the translation plate 12. When the gate valve stem is clamped, the ball screw 15 is driven to rotate, so that the two sliding blocks 16 can move closer to each other synchronously. Then, through the transmission of the connecting plate 17, the two translation plates 12 are driven synchronously, which is beneficial to the clamping work of the gate valve stem.

[0031] Please see Figure 3 Inside the base box 5, a guide rod 18 is fixedly installed below the ball screw 15. Guide plates 19 are symmetrically slidably installed at both ends of the outer side of the guide rod 18. The guide plates 19 are fixedly connected to the sliding block 16.

[0032] The combined use of guide rod 18 and guide plate 19 provides guiding capability, ensuring the linearity and smoothness of the movement of sliding block 16 on ball screw 15, avoiding clamping errors caused by movement trajectory deviation, and further improving machining accuracy and stability.

[0033] Working principle: During use, the central column 2 on the tooling table 1 is driven to rotate by a motor, which drives the four workstations 3 to rotate sequentially to the drilling position for processing the gate valve stem. Each workstation is equipped with two clamping mechanisms 4. The lower end of the gate valve stem is placed in the fixed bottom groove 601 of the fixed base plate 6 of the clamping mechanism 4. The fixed pressure plate 9 is driven to move down by the electric cylinder 10, which, together with the fixed base plate 6, achieves vertical and stable clamping of the gate valve stem. At the same time, the translation plate 12 above the base box 5 moves synchronously through the connecting plate 17 under the drive of the ball screw 15, so that the arc groove 1301 on the clamping block 13 and the rubber pad 14 inside it clamp the gate valve stem in the horizontal direction. When the gate valve stem on one workstation 3 is being drilled, the other workstations 3 can be loaded or unloaded at the same time, realizing continuous operation, significantly improving processing efficiency, and facilitating the batch processing of gate valve stems.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A multi-station machining fixture for gate valve stem holes, comprising a fixture table (1), characterized in that: A central column (2) is fixedly installed in the middle above the tooling table (1). A workstation (3) is fixedly installed on the outside of the central column (2). There are four workstations (3), which are located in the four directions of the central column (2). Each workstation (3) is equipped with a clamping mechanism (4) above it, and there are two clamping mechanisms (4). A motor is fixedly installed in the middle below the tooling table (1), and the output end of the motor is fixedly connected to the central column (2).

2. The multi-station machining fixture for the valve stem hole of a gate valve according to claim 1, characterized in that: The clamping mechanism (4) includes a base box (5), a fixed base plate (6), a back plate (7), a top plate (8), a fixed pressure plate (9), and an electric cylinder (10). The base box (5) is fixedly connected to the workstation (3).

3. The multi-station machining fixture for the valve stem hole of a gate valve according to claim 2, characterized in that: The fixed base plate (6) is fixedly installed in the middle above the base box (5), the back plate (7) is fixedly installed in the middle of the rear end of the base box (5), the top plate (8) is fixedly installed above the front end of the back plate (7), the fixed pressure plate (9) is set directly above the fixed base plate (6), the electric cylinder (10) is fixedly installed above the top plate (8), and the push rod end of the electric cylinder (10) slides through the top plate (8) and is fixedly connected to the fixed pressure plate (9).

4. The multi-station machining fixture for the valve stem hole of a gate valve according to claim 3, characterized in that: The upper end surface of the fixed base plate (6) is provided with a fixed bottom groove (601), and the lower end surface of the fixed pressure plate (9) is provided with a fixed pressure groove (901).

5. The multi-station machining fixture for the valve stem hole of a gate valve according to claim 4, characterized in that: The bottom box (5) is symmetrically provided with translation plates (12) on both sides of the fixed bottom plate (6) above it. Clamping blocks (13) are fixedly installed on the inner side of each of the two translation plates (12). An arc-shaped groove (1301) is provided on one end face of the clamping block (13). A rubber pad (14) is provided inside the arc-shaped groove (1301), and the rubber pad (14) is bonded to the clamping block (13).

6. The multi-station machining fixture for the valve stem hole of a gate valve according to claim 5, characterized in that: A ball screw (15) is rotatably installed inside the base box (5). The threads at both ends of the ball screw (15) are arranged in opposite directions. Sliding blocks (16) are slidably installed at both ends of the ball screw (15). A connecting plate (17) is fixedly installed above the sliding block (16). The connecting plate (17) is fixedly connected to the translation plate (12). A motor box (11) is fixedly installed on one side of the base box (5).

7. The multi-station machining fixture for the valve stem hole of a gate valve according to claim 6, characterized in that: Inside the base box (5), a guide rod (18) is fixedly installed below the ball screw (15). Guide plates (19) are symmetrically slidably installed at both ends of the outer side of the guide rod (18). The guide plates (19) are fixedly connected to the sliding block (16).

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