High-efficiency positioning tool for valve shaft machining

Abstract

The utility model discloses a high -efficient positioning frock for valve shaft processing relates to valve shaft processing technical field. The utility model discloses including upper positioning clamping plate, the lower positioning clamping plate is provided with in the upper positioning clamping plate bottom, the upper positioning clamping plate one side is provided with high -efficient positioning mechanism, and the high -efficient positioning mechanism includes the positioning hole of setting respectively in the upper positioning clamping plate and the lower positioning clamping plate one side. The utility model discloses through setting the positioning hole of multiple different hole diameters on the upper positioning clamping plate and the lower positioning clamping plate, can adapt to multiple specifications's valve shaft, effectively solved the problem such as the unstable clamping, the insufficient contact area of traditional arc clamping plate because of size fixed, significantly improved frock's versatility and positioning accuracy, through setting first cylinder drive connecting frame and clamping plate integral axial movement, realizes the quick axial positioning of valve shaft in the processing process, improves the clamping efficiency, is suitable for multi -process continuous processing.

Description

Technical Field

[0001] This utility model belongs to the field of valve shaft machining technology, and in particular relates to a high-efficiency positioning fixture for valve shaft machining. Background Technology

[0002] In the valve manufacturing industry, the valve shaft, as a key transmission component, directly affects the valve's sealing performance and service life due to its machining accuracy. Turning and grinding are indispensable processes in valve shaft machining, and the accuracy and efficiency of these processes largely depend on the positioning fixtures used in the preceding processes. Currently, in the machining of valve shafts, arc-shaped clamping plates are commonly used for positioning and clamping. These fixtures typically rely on two opposing clamping plates with fixed arc contours to embrace and clamp the outer cylindrical surface of the valve shaft, aiming to achieve rapid centering and positioning of the valve shaft.

[0003] Existing positioning fixtures, when used to position and clamp valve shafts for machining, face challenges due to the wide variety of valve types and specifications, with significant differences in valve shaft diameters. While fixed arc-shaped clamping plates are designed for specific diameters, when used to clamp valve shafts of incompatible dimensions, gaps or only line contact inevitably occur between the arc-shaped surface of the clamping plate and the outer surface of the valve shaft, failing to achieve a perfect surface-to-surface fit. This insufficient fit directly reduces the clamping contact area and leads to uneven clamping force distribution, making the valve shaft prone to fretting, axial movement, or even rotation during machining. This severely affects the rigidity and stability of the clamping, necessitating fixture replacement and resulting in reduced positioning efficiency.

[0004] To address these issues, we offer a high-efficiency positioning fixture for valve shaft machining. Utility Model Content

[0005] The purpose of this invention is to provide a high-efficiency positioning fixture for valve shaft machining. By combining the high-efficiency positioning mechanism and the rotating mechanism, the problem of poor adaptability and reduced positioning efficiency of existing positioning fixtures during use is solved.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0007] This utility model relates to a high-efficiency positioning fixture for valve shaft machining, comprising an upper positioning clamping plate, with a lower positioning clamping plate at the bottom of the upper positioning clamping plate; a high-efficiency positioning mechanism is provided on one side of the upper positioning clamping plate, the high-efficiency positioning mechanism comprising positioning holes respectively opened on one side of the upper positioning clamping plate and the lower positioning clamping plate, a connecting frame fixedly connected to the front of the lower positioning clamping plate, a first cylinder fixedly connected to one side of the connecting frame, and a fixing plate provided on one side of the lower positioning clamping plate; a rotating mechanism is provided on one side of the fixing plate, the rotating mechanism comprising a motor provided on one side of the fixing plate, and a rotating rod fixedly connected to the output end of the motor.

[0008] The present invention is further configured such that the high-efficiency positioning mechanism includes a fixed frame fixedly connected to the rear of the fixed plate, and the first cylinder is fixedly connected to the fixed frame.

[0009] The present invention is further configured such that the high-efficiency positioning mechanism includes a limiting support block fixedly connected to the rear of the connecting frame, and the limiting support block is slidably connected to one side of the inside of the fixed plate.

[0010] The present invention is further configured such that the high-efficiency positioning mechanism includes a clearance groove formed on one side of the fixed plate, the size of which is adapted to the connecting frame.

[0011] The present invention is further configured such that the high-efficiency positioning mechanism includes a horizontal plate disposed on the top of the upper positioning clamping plate, and a second cylinder fixedly connected to the bottom of the horizontal plate.

[0012] The present invention is further configured such that the rotating mechanism includes a support plate movably connected to the surface of the rotating rod, and a support frame fixedly connected to one side of the motor.

[0013] The present invention is further configured such that a support rod is fixedly connected to one side of the fixed plate, a movable groove is provided on one side of the support rod, a movable block is slidably connected inside the movable groove, and a mounting bracket is provided at the bottom of the fixed plate.

[0014] The present invention has the following beneficial effects.

[0015] 1. This utility model, by setting multiple positioning holes of different diameters on the upper and lower positioning clamping plates, can adapt to valve shafts of various specifications, effectively solving the problems of unstable clamping and insufficient contact area caused by the fixed size of traditional arc-shaped clamping plates, significantly improving the versatility and positioning accuracy of the tooling. By setting the first cylinder to drive the connecting frame and the clamping plate to move axially as a whole, the valve shaft can be quickly axially positioned during the processing, improving clamping efficiency and making it suitable for multi-process continuous processing.

[0016] 2. This utility model utilizes a motor-driven rotating rod and a fixed plate to rotate as a whole, enabling the valve shaft to be positioned at multiple angles during processing. This facilitates complex processes such as turning and grinding, improving processing flexibility and efficiency. The combination of the limiting support block and the limiting support groove inside the fixed plate, along with the sliding connection structure between the support rod and the movable block, enhances the rigidity and stability of the tooling during movement and rotation, effectively preventing deviation during processing. The second cylinder drives the upper positioning clamping plate to achieve rapid opening and closing. Combined with the horizontal plate structure, this simplifies the clamping and disassembly process of the valve shaft, further improving operational convenience and production efficiency.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 A perspective view of a high-efficiency positioning fixture used for valve shaft machining.

[0020] Figure 2 This is a diagram showing the movement of the upper positioning clamp in a high-efficiency positioning fixture used for valve shaft machining.

[0021] Figure 3 This is a cross-sectional view of the fixed plate in a high-efficiency positioning fixture used for valve shaft machining.

[0022] Figure 4 This is a left view of a partial structure in a high-efficiency positioning fixture used for valve shaft machining.

[0023] Figure 5 This is a cross-sectional view of the support plate in a high-efficiency positioning fixture used for valve shaft machining.

[0024] In the attached diagram: 1. Upper positioning clamp; 2. Lower positioning clamp; 3. High-efficiency positioning mechanism; 31. Positioning hole; 32. Connecting frame; 33. First cylinder; 34. Fixing plate; 35. Fixing frame; 36. Limiting support block; 37. Leaving groove; 38. Horizontal plate; 39. Second cylinder; 4. Rotating mechanism; 41. Motor; 42. Rotating rod; 43. Support plate; 44. Support frame; 5. Support rod; 6. Mounting frame. Detailed Implementation

[0025] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Example 1

[0027] Please see Figures 1-5 This utility model is a high-efficiency positioning fixture for valve shaft processing, including an upper positioning clamping plate 1, and a lower positioning clamping plate 2 at the bottom of the upper positioning clamping plate 1; a high-efficiency positioning mechanism 3 is provided on one side of the upper positioning clamping plate 1, the high-efficiency positioning mechanism 3 includes positioning holes 31 respectively opened on one side of the upper positioning clamping plate 1 and the lower positioning clamping plate 2, a connecting frame 32 fixedly connected to the front of the lower positioning clamping plate 2, a first cylinder 33 fixedly connected to one side of the connecting frame 32, and a fixing plate 34 provided on one side of the lower positioning clamping plate 2; a rotating mechanism 4 is provided on one side of the fixing plate 34, the rotating mechanism 4 includes a motor 41 provided on one side of the fixing plate 34, and a rotating rod 42 fixedly connected to the output end of the motor 41.

[0028] As a preferred embodiment of the above: the upper positioning clamp 1 and the lower positioning clamp 2 cooperate to quickly clamp and position the valve shaft. The positioning hole 31 is semi-circular. When the upper positioning clamp 1 and the lower positioning clamp 2 are in close contact, they can form multiple circular positioning holes 31. The diameter of the multiple circular positioning holes 31 increases sequentially from back to front. At the same time, the diameter of the multiple circular positioning holes 31 is designed to be the size of several common valve shafts. The output end of the first cylinder 33 is connected to the connecting frame 32. The positioning holes 31 are suitable for clamping valve shafts of different specifications, improving the versatility and adaptability of the tooling. The connecting frame 32 transmits the driving force of the cylinder, driving the clamp and valve shaft to move as a whole, realizing the shaft... For positioning, the first cylinder 33 provides axial driving force, causing the clamped valve shaft to move axially to the processing position, achieving rapid axial positioning. The fixed plate 34 serves as the mounting base for the rotating mechanism 4, supporting the rotating rod 42, and is also connected to the high-efficiency positioning mechanism 3 to ensure the stability of the overall structure. The rotating rod 42 is fixedly connected to the fixed plate 34. The motor 41 provides rotational power, driving the rotating rod 42 and the fixed plate 34 to rotate as a whole, enabling the valve shaft to achieve multi-angle positioning during processing, facilitating multi-process machining such as turning and grinding. The rotating rod 42 serves as the output shaft of the motor 41, transmitting torque and driving the fixed plate 34 and the clamped valve shaft to rotate.

[0029] Example 2

[0030] Please see Figures 1-5Based on embodiment 1, the high-efficiency positioning mechanism 3 further includes a fixed frame 35 fixedly connected to the rear of the fixed plate 34, and the first cylinder 33 is fixedly connected to the fixed frame 35. The high-efficiency positioning mechanism 3 also includes a limiting support block 36 fixedly connected to the rear of the connecting frame 32, and the limiting support block 36 is slidably connected to one side of the interior of the fixed plate 34. The high-efficiency positioning mechanism 3 also includes a clearance groove 37 opened on one side of the fixed plate 34, the size of which is adapted to the connecting frame 32. The high-efficiency positioning mechanism 3 also includes a horizontal plate 38 set on the top of the upper positioning clamping plate 1, and a second cylinder 39 fixedly connected to the bottom of the horizontal plate 38. The rotating mechanism 4 also includes a support plate 43 movably connected to the surface of the rotating rod 42, and a support frame 44 fixedly connected to one side of the motor 41. A support rod 5 is fixedly connected to one side of the fixed plate 34, and a movable groove is provided on one side of the support rod 5. A movable block is slidably connected inside the movable groove. A mounting frame 6 is provided at the bottom of the fixed plate 34.

[0031] As a preferred embodiment of the above: a limiting support groove adapted to the limiting support block 36 is provided on one side of the fixed plate 34; the horizontal plate 38 is fixedly connected to the connecting frame 32; the output end of the second cylinder 39 is fixedly connected to the upper positioning clamping plate 1; the fixed frame 35 fixes the first cylinder 33, enhancing the stability and rigidity of the first cylinder 33 during operation; the limiting support block 36 cooperates with the limiting support groove inside the fixed plate 34 to limit the movement range of the connecting frame 32, preventing overshoot or offset, ensuring positioning accuracy; the clearance groove 37 provides movement space for the connecting frame 32, avoiding interference with the fixed plate 34 during axial movement, ensuring smooth movement; the horizontal plate 38 connects the upper positioning clamping plate 1 and the second cylinder 39. Cylinder 39, the second cylinder 39 drives the upper clamping plate to move up and down, realizing the rapid clamping and release of the valve shaft. The support plate 43 is movably connected to the rotating rod 42 through the bearing. The bottom of the support plate 43 and the support frame 44 are fixedly connected to the mounting frame 6. The top of the mounting frame 6 is provided with a mounting hole. The movable block is fixedly connected to the support rod 5. The support plate 43 supports the rotating rod 42, improving the rotational stability and accuracy. The support frame 44 fixes the motor 41 to ensure rotational stability. The support rod 5 cooperates with the movable block to enhance the lateral support of the fixed plate 34 during rotation, prevent swaying, and improve the overall rigidity. The mounting frame 6 serves as the mounting base of the entire tooling and is fixed to the machine tool or workbench through the mounting hole to ensure the stable operation of the tooling.

[0032] The working principle of this utility model is as follows: When using this tooling, firstly, select the corresponding positioning hole 31 in the upper positioning clamping plate 1 and the lower positioning clamping plate 2 according to the diameter of the valve shaft to be processed. Start the second cylinder 39 to drive the upper positioning clamping plate 1 to move upward, placing the valve shaft in the positioning hole 31 of the lower positioning clamping plate 2. Then, control the second cylinder 39 to press the upper positioning clamping plate 1 downward, completing the radial clamping of the valve shaft. Subsequently, start the first cylinder 33 to push the connecting frame 32 and the clamped valve shaft to move axially, making it accurately positioned to the processing position. During the processing, if multi-angle processing is required, the motor 41 can be started, and the rotating rod 42 can drive the fixed plate 34 and the valve shaft to rotate as a whole, realizing multi-station processing. Throughout the process, the limiting support block 36, the support rod 5, and the movable block work together to ensure the stability and accuracy of movement and rotation.

[0033] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high-efficiency positioning fixture for valve shaft machining, comprising an upper positioning clamp (1), characterized in that: The lower positioning clamp (2) is provided at the bottom of the upper positioning clamp (1); A high-efficiency positioning mechanism (3) is provided on one side of the upper positioning clamp (1). The high-efficiency positioning mechanism (3) includes positioning holes (31) respectively opened on one side of the upper positioning clamp (1) and the lower positioning clamp (2), a connecting frame (32) fixedly connected to the front of the lower positioning clamp (2), a first cylinder (33) fixedly connected to one side of the connecting frame (32), and a fixing plate (34) provided on one side of the lower positioning clamp (2). A rotating mechanism (4) is provided on one side of the fixed plate (34). The rotating mechanism (4) includes a motor (41) provided on one side of the fixed plate (34) and a rotating rod (42) fixedly connected to the output end of the motor (41).

2. The high-efficiency positioning fixture for valve shaft machining according to claim 1, characterized in that: The high-efficiency positioning mechanism (3) also includes a fixed frame (35) fixedly connected to the rear of the fixed plate (34), and the first cylinder (33) is fixedly connected to the fixed frame (35).

3. The high-efficiency positioning fixture for valve shaft machining according to claim 1, characterized in that: The high-efficiency positioning mechanism (3) also includes a limiting support block (36) fixedly connected to the rear of the connecting frame (32), and the limiting support block (36) is slidably connected to one side of the inside of the fixing plate (34).

4. The high-efficiency positioning fixture for valve shaft machining according to claim 1, characterized in that: The high-efficiency positioning mechanism (3) also includes a clearance groove (37) opened on one side of the fixed plate (34), the size of which is adapted to the connecting frame (32).

5. The high-efficiency positioning fixture for valve shaft machining according to claim 1, characterized in that: The high-efficiency positioning mechanism (3) also includes a horizontal plate (38) disposed on the top of the upper positioning clamp (1) and a second cylinder (39) fixedly connected to the bottom of the horizontal plate (38).

6. The high-efficiency positioning fixture for valve shaft machining according to claim 1, characterized in that: The rotating mechanism (4) also includes a support plate (43) movably connected to the surface of the rotating rod (42) and a support frame (44) fixedly connected to one side of the motor (41).

7. The high-efficiency positioning fixture for valve shaft machining according to claim 1, characterized in that: A support rod (5) is fixedly connected to one side of the fixed plate (34), and a movable groove is provided on one side of the support rod (5). A movable block is slidably connected inside the movable groove, and an installation bracket (6) is provided at the bottom of the fixed plate (34).

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