Valve body machining center front face clamp

Abstract

The utility model discloses a valve body machining center positive face clamp, it includes jig plate, air cylinder, cushion block, clamping block, flat bottom surface, alignment block and alignment groove. Multiple air cylinders are arranged on the jig plate with equal interval, and the air cylinder top is equipped with cushion block and sliding clamping block, and the clamping block realizes radial movement clamping valve body through the drive of gas source, the alignment groove on the alignment block cooperates with the valve body convex rib and realizes accurate positioning. The utility model can realize high accuracy alignment, stable clamping and efficient space utilization, solves the problem of traditional clamp positioning inaccuracy, unstable clamping and low space utilization, and significantly improves the processing efficiency and product quality.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, and in particular to a front fixture for a valve body machining center. Background Technology

[0002] In the field of machining, the valve body, as a crucial component, directly impacts the performance of the final product through its machining accuracy and stability. Traditional valve body machining typically relies on manual clamping or simple mechanical fixtures for fixation. These methods often struggle to guarantee the accuracy and stability of clamping when dealing with valve bodies of complex shapes. Particularly when machining the reverse side of the valve body, due to its unique structure—for example, a protruding section extending outwards at one end and a raised ridge in the middle—traditional fixtures struggle to achieve precise alignment and reliable clamping, easily leading to movement during machining and affecting machining accuracy and efficiency. Furthermore, existing fixture designs often fail to adequately consider space utilization and multi-station machining requirements, making it difficult to assemble more valve bodies within limited space, thus limiting production efficiency. Simultaneously, the complex structure and cumbersome operation of traditional fixtures fail to meet the demands of modern machining centers for efficient and automated production. Therefore, developing a valve body machining center front-side fixture capable of achieving high-precision alignment, stable clamping, and balancing space utilization and ease of operation has become a pressing technical challenge. Utility Model Content

[0003] The purpose of this invention is to provide a front fixture for valve body machining centers to overcome the shortcomings of existing technologies.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A front-side fixture for a valve body machining center includes a jig plate, a cylinder, a pad, a clamping block, a flat bottom surface, an alignment block, and an alignment groove, wherein: The fixture plate serves as the base platform for the clamp, and its upper surface is provided with multiple mounting holes for fixing to the worktable of the machining center by bolts or pins; multiple cylinders are arranged at equal intervals on the upper surface of the fixture plate, and each cylinder is fixed to the fixture plate by threaded connection or welding to achieve uniform distribution and installation of various functional components.

[0005] Furthermore, the cylinder is a double-acting cylinder with a sliding mechanism at its top. The sliding mechanism includes a guide rail and a slider, which is fixedly connected to the clamping block. The cylinder drives the slider to move radially via an air source, thereby causing the clamping block to perform clamping or releasing actions. The cylinder's air inlet and outlet are connected to an external air source via air pipes. The pressure and flow rate of the air source can be adjusted by a solenoid valve to accommodate the clamping requirements of valve bodies of different sizes and materials.

[0006] Specifically, the pad is annularly mounted on the top of the cylinder and fixed to the outer periphery of the cylinder by bolts or adhesive bonding. Its upper surface is precision ground to ensure that the flatness and parallelism meet the requirements of high-precision machining. The height of the pad is designed to be consistent with the height of the flat bottom surface of the clamping block, thereby providing uniform support for the valve body during clamping and avoiding deformation or movement caused by uneven force.

[0007] Furthermore, the clamping block is slidably mounted on top of the cylinder, and its bottom is provided with a sliding groove that engages with the guide rail on top of the cylinder to achieve smooth radial movement. The top of the clamping block has a downward-extending flat surface, the vertical height of which is consistent with the vertical height of the top of the pad block, and the flat surface is arranged in a ring between adjacent clamping blocks to hold the valve body and ensure its stability. The inner surface of the clamping block is provided with an anti-slip texture or coating to increase friction when in contact with the valve body and prevent slippage during processing.

[0008] Specifically, the flat bottom surface is fixed to the top of the clamping block by bolts or welding, and its lower end extends to the bottom of the clamping block, forming a complete support structure. The surface of the flat bottom surface is hardened to improve wear resistance and impact resistance, while ensuring that the height consistency error between it and the pad is controlled within ±0.02mm, thereby ensuring the stability of the valve body when placed.

[0009] Furthermore, the alignment block is fixedly mounted on the top of the cylinder, and is secured to the center of the cylinder by bolts or pins. A downward-extending alignment groove is formed on its top. The width and depth of the alignment groove are designed according to the dimensions of the central convex ridge of the valve body, and its inner wall is polished to reduce frictional resistance when in contact with the valve body. When the valve body is placed above the cylinder, the alignment block provides initial positioning of the valve body, and the central convex ridge of the valve body can engage in the alignment groove, thereby achieving precise alignment and stable placement.

[0010] Specifically, the opening of the alignment groove is chamfered at a 45° angle with a width of 1mm to facilitate the rapid insertion of the valve body protrusion into the alignment groove, reducing the time required for manual intervention. An elastic buffer pad made of polyurethane is provided at the bottom of the alignment groove to provide cushioning when the valve body protrusion is engaged, preventing damage to the valve body surface due to excessive impact.

[0011] The valve body clamping process of this utility model includes the following steps: S1: Place the valve body above the cylinder and use the alignment block and alignment groove for initial positioning to ensure that the convex edge of the valve body is accurately engaged in the alignment groove; S2: Drive the cylinder with an external air source to move the slider along the guide rail, which in turn drives the clamping block to move towards the center in the radial direction until the inner surface of the clamping block is in close contact with the outer surface of the valve body, thus completing the clamping action. S3: After processing, the cylinder is driven by an external air source to make the slider move in the opposite direction along the guide rail, which in turn drives the clamping block to move outward in the radial direction, releasing the valve body and making it easier to remove the processed valve body.

[0012] Furthermore, the moving speed and clamping force of the clamping block can be precisely controlled by adjusting the air source pressure. The maximum clamping force of the clamping block ranges from 500N to 1500N, and the moving speed ranges from 5mm / s to 20mm / s, in order to adapt to the processing requirements of valve bodies of different materials and sizes.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: By incorporating alignment blocks and grooves on the top of the cylinder, the valve body can be quickly and accurately aligned during placement, avoiding positioning errors caused by manual adjustments in traditional fixtures and significantly improving machining accuracy. The use of elastic buffer pads within the alignment grooves reduces hard contact between the valve body and the fixture, effectively protecting the surface quality of the valve body.

[0014] Furthermore, the clamping block achieves automatic clamping via air supply, with clamping force evenly distributed on the outer surface of the valve body. This ensures the stability of the valve body during processing and avoids movement caused by insufficient or uneven clamping force, thus improving processing efficiency. The anti-slip texture or coating on the inner surface of the clamping block further enhances the reliability of clamping, making it particularly suitable for machining valve bodies with high hardness or smooth surfaces.

[0015] In particular, the design of arranging multiple cylinders at equal intervals on the jig plate makes full use of limited space, allowing multiple valve bodies to be assembled simultaneously within the same machining center, meeting the needs of multi-station machining and significantly improving production efficiency. Furthermore, the fixture's overall structural design is reasonable, its operation is simple, and it can seamlessly interface with the automated control system of modern machining centers, meeting the requirements of high-efficiency, automated production.

[0016] In summary, this utility model achieves high-precision alignment, stable clamping, and efficient space utilization by optimizing the fixture structure design, solving the technical problems existing in the prior art, and has significant technical progress and practical value. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the clamping valve body of this utility model; Figure 3 This is a structural schematic diagram from another perspective of the present invention.

[0018] Attached image annotations: 1. Cylinder; 2. Fixture plate; 3. Valve body; 4. Flat bottom surface; 5. Pad block; 6. Cylinder body; 7. Clamping block; 8. Alignment groove; 9. Alignment block. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings: like Figure 1-3 As shown in the figure, this embodiment provides a front fixture for a valve body machining center. Its structure is rationally designed and easy to operate, significantly improving the accuracy and efficiency of valve body machining. The fixture includes a jig plate 2, a cylinder 1, a pad block 5, a clamping block 7, a flat bottom surface 4, an alignment block 9, and an alignment groove 8. These components work together to achieve high-precision alignment and stable clamping.

[0020] The jig plate 2 serves as the base platform for the fixture. Its upper surface has multiple mounting holes for fixing it to the worktable of the machining center using bolts or pins, ensuring the overall stability of the fixture. Multiple cylinders 1 are evenly spaced on the upper surface of the jig plate 2. Each cylinder 1 is fixed to the jig plate 2 via threaded connection or welding. This evenly distributed design allows the fixture to assemble more valve bodies within a limited space, thus meeting the needs of multi-station machining. The cylinders 1 employ a double-acting cylinder design, with a sliding mechanism at the top. The sliding mechanism includes a guide rail and a slider. The slider is fixedly connected to the clamping block 7. The cylinder 1 drives the slider to move radially via an air source, thereby causing the clamping block 7 to perform clamping or releasing actions. The air inlet and outlet of the cylinder 1 are connected to an external air source via air pipes. The pressure and flow rate of the air source can be adjusted by a solenoid valve to accommodate the clamping requirements of valve bodies of different sizes and materials.

[0021] A pad 5 is circumferentially mounted on top of cylinder 1. The pad 5 is fixed to the outer periphery of cylinder 1 by bolts or adhesive bonding. Its upper surface is precision ground to ensure flatness and parallelism meet high-precision machining requirements. The height of the pad 5 is designed to match the height of the flat bottom surface 4 of the clamping block 7, thus providing uniform support for the valve body 3 during clamping and preventing deformation or movement due to uneven force. The clamping block 7 is slidably mounted on top of cylinder 1. A sliding groove is provided at the bottom of the clamping block 7, which cooperates with the guide rail on top of cylinder 1 to achieve smooth radial movement. The top of the clamping block 7 has a downward-extending flat bottom surface 4. The vertical height of the top of the flat bottom surface 4 is consistent with the vertical height of the top of the pad 5, and the flat bottom surface 4 is arranged in a ring between adjacent clamping blocks 7 to place the valve body 3 and ensure its stability. The inner surface of the clamping block 7 is provided with an anti-slip texture or coating to increase friction when in contact with the valve body 3 and prevent slippage during machining.

[0022] The flat bottom surface 4 is fixed to the top of the clamping block 7 by bolts or welding, and its lower end extends to the bottom of the clamping block 7 to form a complete support structure. The surface of the flat bottom surface 4 is hardened to improve wear resistance and impact resistance, while ensuring that the height consistency between it and the pad block 5 is controlled within ±0.02mm, thus ensuring the stability of the valve body 3 when placed. The alignment block 9 is fixed to the top of the cylinder 1. The alignment block 9 is fixed to the center position of the cylinder 1 by bolts or pins, and its top has a downward extending alignment groove 8. The width and depth of the alignment groove 8 are designed according to the size of the convex ridge in the middle of the valve body 3, and its inner wall is polished to reduce the frictional resistance when in contact with the valve body 3. When the valve body 3 is placed above the cylinder 1, the alignment block 9 performs preliminary positioning of the valve body 3, and the convex ridge in the middle of the valve body 3 can be inserted into the alignment groove 8, thereby achieving precise alignment and stable placement.

[0023] The opening of the alignment groove 8 is chamfered at a 45° angle with a width of 1mm to facilitate the rapid insertion of the valve body 3 protrusion into the alignment groove 8, reducing manual intervention time. An elastic buffer pad made of polyurethane is installed at the bottom of the alignment groove 8 to provide cushioning when the valve body 3 protrusion is engaged, preventing damage to the valve body 3 surface due to excessive impact. The clamping process of the valve body 3 is as follows: S1. The valve body 3 is placed above the cylinder 1, and initial positioning is performed using the alignment block 9 and the alignment groove 8 to ensure the valve body 3 protrusion is accurately engaged in the alignment groove 8. S2. The cylinder 1 is driven by an external air source to move the slider along the guide rail, causing the clamping block 7 to move radially towards the center until the inner surface of the clamping block 7 is tightly fitted with the outer surface of the valve body 3, completing the clamping action. S3. After processing, the cylinder 1 is driven by an external air source to move the slider in the opposite direction along the guide rail, causing the clamping block 7 to move radially outward, releasing the valve body 3 for easy removal.

[0024] The moving speed and clamping force of the clamping block 7 are precisely controlled by adjusting the air source pressure. The maximum clamping force of the clamping block 7 ranges from 500N to 1500N, and the moving speed ranges from 5mm / s to 20mm / s to adapt to the processing requirements of valve bodies 3 of different materials and sizes. By setting the alignment block 9 and alignment groove 8 on the top of the cylinder 1, the valve body 3 can be quickly and accurately aligned during placement, avoiding the positioning errors caused by manual adjustment in traditional fixtures and significantly improving processing accuracy. The elastic buffer pad set in the alignment groove 8 reduces the hard contact between the valve body 3 and the fixture, effectively protecting the surface quality of the valve body 3.

[0025] The clamping block 7, driven by an air source, achieves automatic clamping, with the clamping force evenly distributed on the outer surface of the valve body 3. This ensures the stability of the valve body 3 during processing and avoids movement caused by insufficient or uneven clamping force, thus improving processing efficiency. The anti-slip texture or coating on the inner surface of the clamping block 7 further enhances the reliability of clamping, making it particularly suitable for machining valve bodies 3 with high hardness or smooth surfaces. The design of multiple cylinders 1 arranged at equal intervals on the fixture plate 2 makes full use of limited space, allowing multiple valve bodies 3 to be assembled simultaneously within the same machining center, meeting multi-station processing needs and significantly improving production efficiency. Furthermore, the overall structure of the fixture is rationally designed and easy to operate, seamlessly integrating with the automated control system of modern machining centers, meeting the requirements of efficient and automated production.

[0026] In practical applications, this fixture is particularly suitable for machining valve bodies 3 with complex shapes, such as valve bodies 3 with an outwardly extending protrusion at one end and a raised ridge in the middle. During machining, the valve body 3 is first placed above the cylinder 1. By observing the positions of the alignment block 9 and the alignment groove 8, it is ensured that the raised ridge of the valve body 3 is accurately engaged in the alignment groove 8. Then, the air source is activated, and the air pressure is adjusted via the solenoid valve to move the clamping block 7 radially towards the center until the inner surface of the clamping block 7 is tightly fitted against the outer surface of the valve body 3. The anti-slip texture or coating of the clamping block 7 increases the friction between it and the valve body 3, further improving the reliability of the clamping. During machining, the stable clamping force provided by the air source ensures that the valve body 3 does not shift, thus guaranteeing machining accuracy and efficiency. After machining is completed, the air source is activated again, causing the clamping block 7 to move radially outward, releasing the valve body 3. The operator can then easily remove the machined valve body 3.

[0027] To further optimize the performance of the fixture, its parameters can be adjusted according to specific processing requirements during actual use. For example, for valve bodies 3 made of different materials, the clamping force range of the clamping block 7 can be changed by adjusting the air source pressure to adapt to the processing requirements of lightweight or high-hardness materials. In addition, for valve bodies 3 of different sizes, flexible adaptation can be achieved by replacing clamping blocks 7 of different specifications or adjusting the stroke of cylinder 1. The overall structure of the fixture is compact and the modular design facilitates maintenance and replacement of parts, further reducing operating costs.

[0028] In summary, this utility model achieves high-precision alignment, stable clamping, and efficient space utilization through optimized fixture structure design, solving the technical problems existing in the prior art and demonstrating significant technological progress and practical value. In practical applications, this fixture not only significantly improves the accuracy and efficiency of valve body 3 machining but also meets the requirements of modern machining centers for efficient and automated production, providing important technical support for the field of mechanical processing.

[0029] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. For those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A front-side fixture for a valve body machining center, characterized in that... The fixture includes a jig plate (2), a cylinder (1), a pad (5), a clamping block (7), a flat bottom surface (4), an alignment block (9), and an alignment groove (8), wherein: The fixture plate (2) serves as the base platform of the fixture. Its upper surface is provided with multiple mounting holes for fixing to the worktable of the machining center by bolts or pins. Multiple cylinders (1) are arranged at equal intervals on the upper surface of the fixture plate (2). Each cylinder (1) is fixed to the fixture plate (2) by threaded connection or welding. The cylinder (1) is a double-acting cylinder with a sliding mechanism on its top. The sliding mechanism includes a guide rail and a slider. The slider is fixedly connected to the clamping block (7). The cylinder (1) drives the slider to move in the radial direction through the air source, thereby driving the clamping block (7) to perform clamping or releasing actions. The pad (5) is arranged around the top of the cylinder (1). The pad (5) is fixed to the outer periphery of the cylinder (1) by bolts or adhesive. Its upper surface is precision ground. The height of the pad (5) is designed to be consistent with the height of the flat bottom surface (4) of the clamping block (7). The clamping block (7) is slidably arranged on the top of the cylinder (1). The bottom of the clamping block (7) is provided with a sliding groove. The sliding groove cooperates with the guide rail on the top of the cylinder (1). The top of the clamping block (7) is provided with a downwardly extending flat bottom surface (4). The vertical height of the top of the flat bottom surface (4) is consistent with the vertical height of the top of the pad (5). The alignment block (9) is fixedly arranged on the top of the cylinder (1). The alignment block (9) is fixed to the center position of the cylinder (1) by bolts or pins. Its top is provided with a downwardly extending alignment groove (8).

2. The valve body machining center front fixture according to claim 1, characterized in that... The air inlet and outlet of the cylinder (1) are connected to an external air source through air pipes, and the pressure and flow rate of the air source can be adjusted by a solenoid valve.

3. The valve body machining center front fixture according to claim 2, characterized in that... The inner surface of the clamping block (7) is provided with an anti-slip texture or coating.

4. The valve body machining center front fixture according to claim 1, characterized in that... The flat bottom surface (4) is fixed to the top of the clamping block (7) by bolts or welding, and its lower end extends to the bottom of the clamping block (7) to form a complete support structure.

5. The valve body machining center front fixture according to claim 1, characterized in that... The opening of the alignment groove (8) is provided with a chamfer structure, the chamfer angle is 45° and the width is 1mm.

6. The valve body machining center front fixture according to claim 5, characterized in that... The bottom of the alignment groove (8) is provided with an elastic buffer pad, which is made of polyurethane material.

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