Second-generation valve body machining tooling

Abstract

The utility model provides a second generation valve body processing frock, including valve body base, valve body base fixed mounting is on the hydraulic chuck, three valve body clamping jaws of sliding installation on its valve body base are connected with the wedge of hydraulic chuck, the limit seat and the counterweight seat are fixedly installed on the valve body base, the limit post of sliding installation on the limit seat is connected with the spring of installation in itself, two valve body stops and a plurality of height limiting screws are installed on the valve body base, and the valve body casting is clamped by the valve body clamping jaw, the utility model provides the accurate axial reference through the height limiting screw of valve body base, and the limit post of spring drive is inserted into the valve body hole hole when being assembled, and the problem of the inconsistent problem of repeated clamping positioning is solved fundamentally in combination with the limitation of angular rotation, the guarantee of circumferential positioning accuracy.

Description

Technical Field

[0001] This utility model belongs to the field of valve body tooling technology, and in particular relates to a second-generation valve body processing tooling. Background Technology

[0002] In the valve manufacturing industry, the Y-102S second-generation valve body, as a mass-produced cast aluminum part, places extremely high demands on the precision and efficiency of clamping during its precision machining process. Currently, the industry generally uses ordinary three-jaw chucks for clamping. This clamping method has the following main drawbacks: First, the clamping speed is slow, the operation process is cumbersome and laborious, resulting in long equipment downtime, which cannot meet the cycle time requirements of mass production lines; second, the positioning consistency is poor during repeated clamping, which easily leads to cumulative errors, causing the angular position of the workpiece to be inconsistent, resulting in out-of-tolerance machining dimensions or even workpiece scrap; third, existing general-purpose chucks lack effective mistake-proofing mechanisms, and operators are prone to clamping the workpiece skewed or in the wrong direction during rapid repetitive operations, which not only affects the machining quality but also brings safety hazards.

[0003] Therefore, it is essential to invent a second-generation valve body machining tool. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a second-generation valve body processing fixture, including a valve body base, valve body claws, a limiting seat, a counterweight seat, a limiting post, a spring, a valve body stop, a height limiting screw, and a valve body casting. The valve body base is fixedly installed on a hydraulic chuck. Three valve body claws slidably installed on the valve body base are connected to the wedge block of the hydraulic chuck. The limiting seat and the counterweight seat are fixedly installed on the valve body base. The limiting post slidably installed on the limiting seat is connected to the spring installed inside the limiting seat. Two valve body stops and several height limiting screws are installed on the valve body base. The valve body casting is clamped by the valve body claws.

[0005] Preferably, the limiting seat, counterweight seat, valve body block and height limiting screw are arranged around the three valve body claws, and a height limiting screw is provided on the outer side of each valve body block.

[0006] Preferably, the upper end face of the height limiting screw is in contact with the lower surface of the valve body casting to provide a base surface for the bottom surface of the valve body casting, and the valve body base is provided with a screw hole that is threadedly connected to the height limiting screw.

[0007] Preferably, the valve body stop has an "L" shaped structure, the valve body stop is a foolproof block, it is located in the inner ring of the valve body casting, the vertical height of the valve body stop is higher than the height of the height limiting screw, and the valve body stop is located on one side of one of the valve body claws.

[0008] Preferably, the limiting seat provided on one side of the valve body claw is an inverted "T" shaped structure. Its horizontal part is fixedly connected to the valve body base by bolts, and its vertical part is provided with a sliding groove. The limiting post is slidably installed in the sliding groove of the vertical part of the limiting seat. The limiting post can be inserted into the hole of the valve body casting. The spring in the sliding groove of the limiting seat can provide elastic force for the limiting post.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] This invention provides a precise reference plane for the lower surface of the valve body casting by using a height-limiting screw on the valve body base, ensuring axial positioning accuracy. Simultaneously, a spring-loaded limiting post automatically inserts into the valve body hole during clamping, effectively limiting angular rotation of the workpiece and ensuring accurate circumferential positioning. The combination of these two features fundamentally solves the technical problem of inconsistent positioning during repeated clamping.

[0011] The "L"-shaped valve body stop block of this utility model constitutes a key foolproof structure. Its vertical height is higher than that of the height-limiting screw, which can physically prevent the workpiece from being installed in the wrong direction or position, thus avoiding clamping misalignment or angular misalignment caused by operator negligence, greatly reducing the scrap rate and improving operational safety.

[0012] This utility model features a compact structure with functional components such as a limit seat, counterweight seat, and valve body stop block arranged around three jaws. The inverted "T"-shaped limit seat structure is stable, ensuring the guiding accuracy of the limit column's movement. The counterweight seat helps balance the overall tooling, suppressing vibration during high-speed machining and further ensuring stable machining quality. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the assembly valve body casting structure of this utility model.

[0014] Figure 2 This is a structural schematic diagram of the unassembled valve body casting of this utility model.

[0015] Figure 3 This is a partial cross-sectional structural diagram of the limiting seat of this utility model.

[0016] In the picture:

[0017] 1. Valve body base, 2. Valve body claw, 3. Limit seat, 4. Counterweight seat, 5. Limit post, 6. Spring, 7. Valve body stop block, 8. Height limit screw, 9. Valve body casting. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0019] In the description of the embodiments, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances.

[0020] As attached Figure 1 To be continued Figure 3 As shown:

[0021] This utility model provides a second-generation valve body processing fixture, including a valve body base 1, valve body claws 2, a limiting seat 3, a counterweight seat 4, a limiting post 5, a spring 6, a valve body stop block 7, a height limiting screw 8, and a valve body casting 9. The valve body base 1 is fixedly installed on a hydraulic chuck. Three valve body claws 2 slidably installed on the valve body base 1 are connected to the wedge blocks of the hydraulic chuck. The limiting seat 3 and the counterweight seat 4 are fixedly installed on the valve body base 1. The limiting post 5 slidably installed on the limiting seat 3 is connected to the spring 6 installed inside it. Two valve body stop blocks 7 and several height limiting screws 8 are installed on the valve body base 1. The valve body casting 9 is clamped by the valve body claws 2.

[0022] Furthermore, the valve body base 1 serves as the foundation of the entire tooling, with its core clamping mechanism consisting of three radially distributed valve body claws 2. To achieve rapid and precise positioning and error prevention of the valve body casting 9, a series of functional components, including limit seats 3, counterweight seats 4, valve body blocks 7, and height-limiting screws 8, are scientifically and rationally arranged around the three valve body claws 2. This surrounding layout ensures the compactness and balance of the tooling structure, placing the positioning elements close to the clamping points and effectively improving the rigidity of the system. In particular, a height-limiting screw 8 is positioned near the outer edge of each valve body block 7. This paired arrangement forms a local positioning reference unit, allowing the valve body casting 9 to be simultaneously guided and limited during insertion, laying the foundation for subsequent stable clamping.

[0023] Furthermore, the height-limiting screw 8 is a key component for achieving precise axial (height) positioning of this tooling. It is screwed into a dedicated threaded hole machined on the valve body base 1 via a threaded connection, allowing its height to be precisely adjusted according to the theoretical reference surface height of the valve body casting 9. Its position can be fixed by tightening a nut or similar means. In the final working state, the upper surface of the precisely adjusted height-limiting screw 8 will be in complete contact with the lower surface of the suspended valve body casting 9. This contact surface serves as the axial process reference surface for the valve body casting 9 throughout the entire machining process, ensuring consistent positioning of all workpieces in the Z-axis direction. The screw design not only provides convenient height adjustment capabilities, but its robust metal material (such as 45# steel or alloy steel) also ensures the wear resistance and stability of the reference surface over long-term use, thus fundamentally eliminating dimensional deviations caused by inaccurate axial positioning.

[0024] Furthermore, the valve body stop 7 is specifically designed with an "L" shape, which allows it to constrain the valve body casting 9 both radially and axially. Its main function is to act as a foolproof (error-proof) block. This stop is securely fastened to the valve body base 1 via its horizontal base using hexagonal socket head cap screws. Its installation position is precisely calculated and located in a specific orientation within the inner space of the valve body casting 9. A key design feature is that the vertical height of the vertical portion of the valve body stop 7 (i.e., the long side of the "L") is designed to be significantly higher than the top height of the adjacent height-limiting screw 8. This height difference ensures that when installing the valve body casting 9, it can only be smoothly lowered and its bottom surface can contact the height-limiting screw 8 when it is in the only correct angular orientation. If the orientation is incorrect, the inner wall or boss of the valve body casting 9 will be blocked by the higher portion of the valve body stop 7, preventing it from being positioned, thus achieving physical-level forced error prevention. The valve body stop 7 is usually arranged on one side of one of the valve body claws 2 to form a mis-proof station that does not interfere with clamping but can effectively identify the direction.

[0025] Furthermore, a dedicated limiting seat 3 is provided on one side of one of the valve body claws 2. This limiting seat 3 is designed as an inverted "T" shape, with its horizontal portion rigidly connected to the valve body base 1 via high-strength bolts to ensure its stability. Its vertical portion serves as a guide mechanism, with a precisely machined vertical groove inside. A limiting post 5 is slidably installed within this groove, allowing for a small range of vertical movement. Below the limiting post 5, at the bottom of the groove, a spring 6 is installed, continuously providing an upward elastic preload to the limiting post 5. In its natural state, this elastic force causes the upper end of the limiting post 5 to protrude from the top of the guide block. When the valve body casting 9 is placed on the lower height-limiting screw 8, the upper end of the limiting post 5 automatically inserts into a pre-drilled hole or groove at the bottom of the valve body casting 9 under the push of the spring 6. This action automatically and precisely defines the angular position of the workpiece, effectively preventing circumferential rotation that may occur during processing and ensuring angular consistency in processes such as drilling. This elastic design allows the limiting post 5 to retract via the compression spring 6 even in cases of slight workpiece misalignment, providing a degree of fault tolerance and preventing rigid collisions.

[0026] The working principle is as follows: First, the operator initially places the valve body casting 9 into the tooling area. During this process, the valve body stop 7 first plays its foolproof role. Its unique "L"-shaped structure and height design above the height limit screw 8 ensure that the valve body casting 9 can only pass smoothly when it is in the only correct angular orientation. Otherwise, it will be physically blocked, thus preventing misinstallation from the source.

[0027] Once the valve body casting 9 is placed in the correct orientation, its lower surface will eventually make stable contact with the upper surfaces of multiple precisely adjusted height-limiting screws 8. These height-limiting screws 8 together form a precise axial reference plane, ensuring the consistent positioning of the valve body casting 9 in the height direction.

[0028] Almost simultaneously with the contact between the valve body casting 9 and the height limiting screw 8, the limiting post 5 is pushed under the continuous elastic force of the spring 6, causing its upper end to automatically and precisely insert into the corresponding pre-set hole or groove at the bottom of the valve body casting 9. This action completes the precise positioning of the circumferential angle of the valve body casting 9, effectively preventing rotation that may occur during subsequent processing.

[0029] Finally, the external hydraulic system drives the hydraulic chuck, and power is transmitted through wedge blocks to the three intermittently connected valve body jaws 2. The valve body jaws 2 slide synchronously towards the center on the radial guide rails of the valve body base 1, thereby stably and reliably clamping the accurately positioned valve body casting 9 from the side. At this point, the valve body casting 9 is fully constrained in the axial, radial, and angular directions, and high-precision machining can begin. The entire workflow is smooth and efficient, and relies heavily on the guiding and positioning functions of the tooling itself, significantly reducing the dependence on operator skills.

[0030] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A second-generation valve body machining fixture, characterized in that, The valve body includes a valve body base (1), valve body claws (2), a limit seat (3), a counterweight seat (4), a limit post (5), a spring (6), a valve body stop (7), a height limit screw (8), and a valve body casting (9). The valve body base (1) is fixedly mounted on a hydraulic chuck. Three valve body claws (2) slidably mounted on the valve body base (1) are connected to the wedge block of the hydraulic chuck. The limit seat (3) and the counterweight seat (4) are fixedly mounted on the valve body base (1). The limit post (5) slidably mounted on the limit seat (3) is connected to the spring (6) installed inside the limit seat. Two valve body stops (7) and several height limit screws (8) are mounted on the valve body base (1). The valve body casting (9) is clamped by the valve body claws (2).

2. The second-generation valve body machining fixture as described in claim 1, characterized in that: The three valve body claws (2) are surrounded by the limiting seat (3), the counterweight seat (4), the valve body block (7) and the height limiting screw (8), and a height limiting screw (8) is provided on the outer side of each valve body block (7).

3. The second-generation valve body machining fixture as described in claim 2, characterized in that: The upper end face of the height limiting screw (8) is in contact with the lower surface of the valve body casting (9) to provide a base surface for the bottom surface of the valve body casting (9). The valve body base (1) is provided with a screw hole that is threadedly connected to the height limiting screw (8).

4. The second-generation valve body machining fixture as described in claim 3, characterized in that: The valve body stop (7) has an "L" shaped structure and is a foolproof block. It is located in the inner ring of the valve body casting (9). The vertical height of the valve body stop (7) is higher than the height of the height limiting screw (8). The valve body stop (7) is located on one side of one of the valve body claws (2).

5. The second-generation valve body machining fixture as described in claim 4, characterized in that: The limiting seat (3) provided on one side of the valve body claw (2) is an inverted "T" shaped structure. Its horizontal part is fixedly connected to the valve body base (1) by bolts, and its vertical part is provided with a sliding groove. The limiting post (5) is slidably installed in the sliding groove of the vertical part of the limiting seat (3). The limiting post (5) can be inserted into the hole of the valve body casting (9). The spring (6) in the sliding groove of the limiting seat (3) can provide elastic force for the limiting post (5).

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