A valve body machining special fixture and method

Abstract

The application provides a special clamp and method for valve body machining, which comprises a fixed base and a moving base. The rear side of the fixed base is provided with an installation groove and a through center hole. The moving base comprises a sliding plate and an installation plate which are perpendicular to each other. The sliding plate is connected to the front side of the fixed base and can be adjusted in the length direction. A vertical screw is fixed on the installation plate. A fixed chuck and a movable chuck are connected to the screw in a sliding mode. A fastening nut is connected to the screw in a threaded mode. The two chucks are located between the installation plate and the fastening nut. The opposite faces of the two chucks are provided with coaxial positioning bosses, and the valve body is fixed between the two bosses. The sliding plate is provided with a positioning groove. The center hole, the positioning groove and the screw axis are coplanar. Half of the axial thickness of the valve body plus the thickness of the fixed chuck is equal to the distance from the center of the positioning groove to the installation plate. The center of the valve body thickness after being fixed is coaxial with the positioning groove through the coaxial positioning groove and the center hole, so that the machining hole is coaxial with the main shaft of the machine tool.

Description

Technical Field

[0001] The present invention relates to the technical field of valve body production and manufacturing, and in particular to a special fixture and method for valve body processing. Background Art

[0002] In the field of valve body machining technology, efficient and precise machining of various valve bodies has always been a goal that the industry continues to explore and pursue. As a key component in many mechanical devices, the machining accuracy of the valve body directly affects the overall performance and operational stability of the equipment.

[0003] refer to Figure 1 The valve body 01 shown in the figure has a nearly annular structure. Its upper end features a mounting hole 02 for mounting the valve stem, while its lower end features a threaded positioning hole 03 for positioning the ball within the valve body. During the actual valve body manufacturing process, ensuring the coaxiality of mounting hole 02 and positioning hole 03 is a crucial technical challenge.

[0004] At present, when processing the valve body on a machine tool, conventional processing technology and general fixtures are difficult to meet the strict coaxiality requirements of the mounting hole 02 and the positioning hole 03. Due to the particularity of the valve body structure, the nearly circular ring shape makes it easy to produce deviations during the clamping and positioning process. At the same time, the existing processing methods lack effective positioning and clamping means to ensure the coaxial accuracy of the front and rear processing holes when switching to process holes in different positions. This results in a large coaxiality error between the mounting hole 02 and the positioning hole 03 of the valve body after the processing is completed, which seriously affects the assembly accuracy of the valve body and the normal operation of subsequent equipment. For example, in some valve application scenarios with high requirements for fluid control, the movement of the ball in the valve body may be obstructed due to the misalignment of the mounting hole 02 and the positioning hole 03, affecting the smooth flow of the fluid and the control accuracy. Therefore, how to design a special fixture and method to achieve high-precision coaxial processing of the mounting hole 02 and the positioning hole 03 on a machine tool is a problem that needs to be solved in this application. Summary of the Invention

[0005] In response to the problems pointed out in the background technology, the present invention proposes a special fixture and method for valve body processing to solve the above technical problems.

[0006] The technical solution of the present invention is achieved as follows:

[0007] A special fixture for valve body processing, including a fixed seat and a movable seat,

[0008] The rear side of the fixing seat is provided with a mounting groove, and the center of the fixing seat is provided with a central hole running through the front and rear sides thereof;

[0009] The movable seat comprises a sliding plate and a mounting plate connected perpendicularly to each other. The sliding plate is connected to the front side of the fixed seat and can be adjusted in position along the length direction of the fixed seat.

[0010] A screw rod perpendicular to the mounting plate is connected to the mounting plate, a fixed chuck and a movable chuck are slidably connected to the screw rod, a fastening nut is threadedly connected to the screw rod, the fixed chuck and the movable chuck are located between the mounting plate and the fastening nut, and positioning bosses coaxial with the screw rod are respectively provided on the facing surfaces of the fixed chuck and the movable chuck, and the valve body is fixed between the fixed chuck and the movable chuck;

[0011] The sliding plate is provided with a positioning groove, and the center hole, the positioning groove and the center axis of the screw are located in the same plane;

[0012] One half of the axial thickness of the valve body plus the thickness of the fixing clamping plate is equal to the distance from the center of the positioning groove to the mounting plate.

[0013] The present invention is further configured such that a sliding groove is provided on the fixing seat along its length direction, and a sliding block is provided on the sliding plate to slide in cooperation with the sliding groove.

[0014] The present invention is further configured such that a movable groove is provided on the front side surface of the fixing seat along its length direction, a rotatable screw rod is provided in the movable groove, and a nut block connected to the screw rod is provided on the sliding plate.

[0015] The present invention is further configured such that a fixed plate is provided at one end of the fixed seat in the longitudinal direction, a hole is provided on the fixed plate for the screw rod to pass through, a limit sleeve 1 and a limit sleeve 2 are fixedly connected to the screw rod, the limit sleeve 1 and the limit sleeve 2 are respectively located on both sides of the fixed plate, the limit sleeve 2 is located in the movable groove, and a scale line is provided on the outer side wall of the limit sleeve 1 along its circumference.

[0016] The present invention is further configured such that a fastening hole is provided on the sliding plate, the fastening hole is communicated with the slide groove, and a fastening bolt is threadedly connected to the fastening hole.

[0017] The present invention is further configured such that a reinforcing plate is provided between the sliding plate and the mounting plate to connect the two.

[0018] The present invention is further configured such that the mounting plate is provided with a hole connected to a screw rod, and a fastening screw sleeve is threadedly connected to the screw rod.

[0019] The present invention is further configured such that the sliding plate is provided with a notch groove adapted to be connected to the nut block, and the nut block is fixedly connected to the sliding plate via bolts.

[0020] The present invention is further configured such that a plurality of fixing holes penetrating the front and rear sides of the fixing seat are provided on the fixing seat along the circumference of the mounting groove.

[0021] A valve body processing method uses the above-mentioned fixture, the fixing seat is fixedly installed with the main shaft of the machine tool through the installation groove, and the center hole is coaxial with the main shaft, including the following steps:

[0022] Step S1, install the fixture on the spindle of the machine tool, ensuring that the center hole of the mounting slot is coaxial with the spindle;

[0023] Step S2: Adjust the position of the movable seat on the fixed seat so that the center hole and the positioning groove are coaxial;

[0024] Step S3: Install the valve body between the fixed clamping plate and the movable clamping plate, and clamp and fix the valve body by tightening the nut;

[0025] Step S4: Start the machine tool, the main shaft of the machine tool drives the fixture and the valve body to rotate, and the drilling tool on the machine tool moves toward the valve body to machine a positioning hole on the valve body;

[0026] Step S5: After the positioning hole is processed, the position of the valve body is adjusted, and the valve body is rotated so that the positioning hole on the valve body is coaxial with the positioning groove, and the valve body is clamped and fixed by tightening the nut;

[0027] Step S6: Start the machine tool, the main shaft of the machine tool drives the fixture and the valve body to rotate, and the drilling cutter on the machine tool moves toward the valve body to machine a mounting hole on the valve body that is coaxial with the positioning hole;

[0028] Step S7: Complete the processing of the valve body and disassemble the valve body.

[0029] By adopting the above technical solution, the beneficial effects of the present invention are:

[0030] The special fixture and method for valve body processing provided by the present invention can be installed on the main shaft of the machine tool and rotate with the main shaft of the machine tool. During processing, the processing position of the hole on the valve body can be kept coaxial with the main shaft of the machine tool. During processing, the positioning hole on the valve body is first processed, and then the valve body is rotated. The positioning hole and the positioning groove are made coaxial by adjustment, and then the valve body is fixed and the mounting hole is processed on the valve body.

[0031] The technical solution of this application utilizes the locating groove on the sliding plate to first align the locating groove with the center hole. Because the distance from the center of the locating groove to the mounting plate is equal to half the axial thickness of the valve body plus the thickness of the fixing chuck, the thickness center of the valve body, once secured to the fixture, is coaxial with the locating groove, ensuring that the machined hole remains coaxial with the machine tool's spindle.

[0032] The thickness of the fixed chuck is designed according to the axial thickness of the valve body to be machined, and after the valve body is fixed, the center of the valve body in the thickness direction is automatically aligned with the positioning groove, so that when the positioning hole is machined, the valve body only needs to be fixed, and the drilling tool on the machine tool is aligned with the spindle to perform positioning hole machining; after the positioning hole is machined, the valve body is rotated to align the positioning hole with the positioning groove, and then the valve body is fixed, and the drilling tool is aligned with the spindle to machine the mounting hole on the valve body, so that the machined mounting hole and the positioning hole can be coaxial. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0034] Figure 1 It is a structural schematic diagram of the valve body.

[0035] Figure 2 It is a structural schematic diagram of the front side of the clamp of the present application.

[0036] Figure 3 It is a structural schematic diagram of the rear side of the clamp of the present application.

[0037] Figure 4 It is a structural schematic diagram of the valve body of the clamp of the present application.

[0038] Figure 5 It is a structural schematic diagram of the front view of the clamp of the present application.

[0039] Figure 6 It is an A-A sectional view of the present application. Figure 5

[0040] Figure 7 It is an exploded schematic diagram of the present application.

[0041] Figure 8 It is a structural schematic diagram of the moving seat of the present application.

[0042] Explanation of reference numerals in the drawings: valve body 01, mounting hole 02, positioning hole 03, fixed seat 1, mounting groove 2, center hole 3, sliding plate 4, mounting plate 5, screw rod 6, fixed chuck 7, movable chuck 8, fastening nut 9, positioning boss 10, positioning groove 11, sliding groove 12, sliding block 13, moving groove 14, screw rod 15, nut block 16, fixed plate 17, limiting sleeve 18, limiting sleeve 19, fastening hole 20, fastening bolt 21, reinforcing plate 22, fastening screw sleeve 23, notch groove 24, fixed hole 25. DETAILED DESCRIPTION​

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0044] The following references are made to Figure 1-8 The present application is described as follows:

[0045] Embodiment: A special fixture for valve body machining, comprising a fixed seat 1 and a moving seat, the fixed seat 1 is a rectangular plate structure.

[0046] A circular mounting groove 2 is arranged at the center of the rear side of the fixed seat 1, and a center hole 3 is arranged at the center of the fixed seat 1 and penetrates the front and rear sides. In actual application, the fixed seat 1 will replace the original three-jaw chuck of the main shaft of the machine tool, and is fixedly connected with the main shaft and can rotate with the main shaft. The center hole 3 is coaxial with the main shaft of the machine tool, which lays a foundation for ensuring the coaxiality of the hole in the subsequent machining process.

[0047] The moving seat comprises a sliding plate 4 and a mounting plate 5 connected perpendicularly to each other, the sliding plate 4 is connected to the front side of the fixed seat 1 and can slide along the length direction of the fixed seat 1 for position adjustment, so as to realize position adjustment, and the moving direction can pass through the center of the center hole 3. This adjustable connection mode enables the moving seat to be adjusted to a suitable position according to the machining requirement.

[0048] A screw rod 6 perpendicular to the mounting plate 5 is fixedly connected to the mounting plate 5, a circular fixed chuck 7 and a movable chuck 8 are slidably connected to the screw rod 6, a fastening nut 9 is threadedly connected to the screw rod 6, the fixed chuck 7 and the movable chuck 8 are located between the mounting plate 5 and the fastening nut 9, the fixed chuck 7 abuts against the mounting plate 5, and a positioning boss 10 coaxial with the screw rod 6 is arranged on the facing surfaces of the fixed chuck 7 and the movable chuck 8, and the positioning boss 10 is circular.

[0049] When the valve body needs to be machined and fixed, the valve body is placed between the fixed chuck 7 and the movable chuck 8. The diameter of the positioning boss 10 is equal to the inner diameter of the annular valve body, and the positioning boss 10 will enter the valve body to form radial positioning of the valve body and limit the movement of the valve body in the radial direction. Then, the fastening nut 9 is tightened, the valve body is clamped and fixed in the axial direction and cannot be displaced in the axial direction, and at this time, the valve body can be drilled and machined.

[0050] During machining, the fixture, with its unique structural design, effectively ensures the coaxiality of the mounting hole and the locating hole. Specifically, the fixture is mounted on the machine tool spindle and rotates with it, ensuring that the machining position of the valve body hole remains coaxial with the machine tool spindle during machining. Initially, the locating hole on the valve body is machined. The valve body is then rotated and adjusted to align the locating hole with the locating slot 11. The valve body is then fixed, and the mounting hole is machined.

[0051] In the technical solution of the present application, the positioning groove 11 on the sliding plate 4 is first aligned coaxially with the center hole 3. Since the distance from the center of the positioning groove 11 to the mounting plate 5 is equal to half the axial thickness of the valve body plus the thickness of the fixing chuck 7, the center of the thickness direction of the valve body fixed in the fixture is coaxial with the positioning groove 11, thereby ensuring that the machined hole remains coaxial with the main axis of the machine tool.

[0052] The thickness of the fixing chuck 7 is specifically designed based on the axial thickness of the valve body to be machined. Once the valve body is secured, its thickness center automatically aligns with the locating slot 11. Therefore, machining the locating hole requires only securing the valve body and ensuring the drill on the machine tool is aligned with the spindle. Once the locating hole is machined, the valve body is rotated to align the locating hole with the locating slot 11. The valve body is then secured again, and the drill is aligned with the spindle again to machine the mounting hole. This ensures that the machined mounting hole and the locating hole remain coaxial.

[0053] Sliding plate 4 is provided with a positioning groove 11 (which can be a hole extending through or through the plate). This groove 11 serves as a crucial positioning reference during the entire valve body manufacturing process. Spatially, the center hole 3, positioning groove 11, and the central axis of the screw 6 lie in the same plane. This structural design is not accidental but a deliberate arrangement for precise positioning.

[0054] The coplanarity of the central axes of these three components ensures consistent and stable positional relationships between the various positioning datums and the workpieces during machining. When center hole 3 is coaxial with the machine tool spindle, and positioning slot 11 is adjusted to be coaxial with center hole 3, the central axis of screw 6 also lies in the same plane, forming a stable positional relationship with them. This relationship ensures that the fixed chuck 7, movable chuck 8, and clamped valve body, which are fixed to screw 6, maintain a predetermined geometric relationship in space with the axis of the machine tool spindle, providing a foundational framework for subsequent coaxial machining.

[0055] Furthermore, half the axial thickness of the valve body plus the thickness of the fixing clamp 7 is equal to the distance from the center of the positioning groove 11 to the mounting plate 5. This is the core guarantee for achieving coaxial alignment between the center of the valve body thickness direction and the positioning groove 11.

[0056] Specifically, the fixed chuck 7 abuts the mounting plate 5 and has a fixed thickness, while the axial thickness of the valve body is a known parameter before machining. When the valve body is clamped between the fixed chuck 7 and the movable chuck 8, one side of the fixed chuck 7 contacts one end face of the valve body, while the movable chuck 8 contacts the other end face of the valve body. At this point, the valve body's center, halfway along its axial thickness, is defined as its thickness center. Due to this dimensional relationship, when the valve body is clamped and secured, this center coincides with the center of the positioning groove 11, achieving coaxial alignment.

[0057] This coaxial alignment is of great significance. When machining the locating hole, because the center of the valve body thickness is coaxial with the locating groove 11, and the locating groove 11 is coaxial with the center hole 3 and the machine tool spindle, when the drill is machining with the spindle as the reference, the axis of the locating hole drilled must pass through the center of the valve body thickness and remain coaxial with the locating groove 11, the center hole 3, and the spindle.

[0058] When machining the mounting hole, the valve body is rotated to make the locating hole coaxial with the locating groove 11. Since the center of the valve body thickness is always coaxial with the locating groove 11, the axis of the locating hole also coincides with the center of the valve body thickness. In this case, when machining with a drill that is also coaxial with the main spindle, the axis of the drilled mounting hole will also pass through the center of the valve body thickness, thus ensuring the coaxiality of the mounting hole and the locating hole.

[0059] It can be said that the arrangement of positioning groove 11 on sliding plate 4, the coplanar relationship between center hole 3, positioning groove 11, and the central axis of screw 6, and the specific dimensional constraints together constitute a precise positioning system. This system, with its dual approach of structural and dimensional considerations, ensures that the clamped valve body is always in the precisely preset position during machining. This provides solid technical support for the coaxial machining of the mounting and positioning holes, avoids coaxiality errors caused by inaccurate positioning, and significantly improves the machining accuracy of the valve body.

[0060] The fixed base 1 is provided with a slide groove 12 along its length, and the sliding plate 4 is provided with a slider 13 that slides in cooperation with the slide groove 12. The cooperation between the slide groove 12 and the slider 13 provides a guide for the movement of the sliding plate 4, ensuring that the sliding plate 4 can only move along the length of the fixed base 1, avoiding deviation or shaking, and ensuring the accuracy of the movement direction.

[0061] A movable groove 14 is defined along the front side of the fixed seat 1 along its length. A rotatable screw 15 is positioned within this groove, and a nut block 16 is attached to the sliding plate 4. When the screw 15 is rotated, the threaded engagement between the screw 15 and the nut block 16 converts the rotational motion of the screw 15 into linear motion of the sliding plate 4, thereby adjusting the position of the movable seat. This screw drive system offers high transmission accuracy and stable adjustment, enabling precise control of the movement distance of the sliding plate 4 and meeting the positioning accuracy requirements of valve body processing.

[0062] A fixing plate 17 is provided at one end of the fixing base 1 in the longitudinal direction. The fixing plate 17 is provided with a hole for the screw rod 15 to pass through. A first limiting sleeve 18 and a second limiting sleeve 19 are fixedly connected to the screw rod 15. The first limiting sleeve 18 and the second limiting sleeve 19 are located on either side of the fixing plate 17, respectively. The first limiting sleeve 18 and the second limiting sleeve 19 cooperate with the fixing plate 17 to limit the axial movement of the screw rod 15, allowing the screw rod 15 to rotate, ensuring that the screw rod 15 does not axially move during rotation, thereby ensuring transmission stability. The second limiting sleeve 19 is located within the movable groove 14.

[0063] When the screw rod 15 rotates, the limit sleeve 18 rotates with the screw rod 15. The outer wall of the limit sleeve 18 is provided with scale lines along its circumference. When the screw rod 15 rotates, the limit sleeve 18 rotates with it. By observing the changes in the scale lines, the distance moved by the sliding plate 4 can be intuitively judged, which is convenient for the operator to make precise adjustments and improves the efficiency and accuracy of position adjustment.

[0064] The sliding plate 4 is provided with a fastening hole 20, which is connected to the chute 12. A fastening bolt 21 is threadedly connected to the inner thread of the fastening hole 20. After the position of the movable seat is adjusted, the fastening bolt 21 is tightened so that the fastening bolt 21 abuts against the bottom of the chute 12. The sliding plate 4 is fixed in its current position through friction, preventing it from moving due to factors such as vibration during the processing process. This ensures the stability of the movable seat's positioning and provides a reliable positioning foundation for valve body processing.

[0065] A reinforcing plate 22 is provided between the sliding plate 4 and the mounting plate 5 to connect the two. Two reinforcing plates 22 are provided, one on each side of the mounting plate 5. The reinforcing plates 22 connect the sliding plate 4 and the mounting plate 5, effectively dispersing the forces acting on the connecting portion. This enhances the structural strength of the vertically connected sliding plate 4 and mounting plate 5, prevents deformation or damage to the connecting portion due to excessive forces during machining, and extends the life of the fixture.

[0066] The mounting plate 5 is provided with a hole for connecting to the screw 6. The screw 6 can be fixedly connected to the mounting plate 5 in two ways: one is to thread the fastening screw 23 onto the screw 6, thereby securing the screw 6 to the mounting plate 5 with the help of the fastening screw 23; the other is to directly weld the screw 6 to the mounting plate 5. Both connection methods ensure the firm connection between the screw 6 and the mounting plate 5, ensuring that the screw 6 will not loosen when clamping the valve body.

[0067] The sliding plate 4 is provided with a notched slot 24 adapted to connect with the nut block 16. The nut block 16 is fixedly connected to the sliding plate 4 by bolts. This connection method facilitates the installation and removal of the nut block 16, while ensuring the stability of the connection between the nut block 16 and the sliding plate 4, ensuring that the sliding plate 4 can be reliably moved when the screw rod 15 rotates.

[0068] A plurality of fixing holes 25 are provided on the fixing base 1 along the circumference of the mounting groove 2, extending through the front and rear sides of the fixing base 1. When connecting the fixing base 1 to the machine tool spindle, the mounting groove 2 first serves as a coaxial positioning function, ensuring the coaxiality of the fixing base 1 and the machine tool spindle. Bolts then pass through the fixing holes 25 to connect the fixing base 1 to the machine tool spindle, thus securing the fixing base 1 to the machine tool spindle and ensuring stable rotation of the fixing base 1 with the spindle during machining.

[0069] A valve body processing method uses the above-mentioned fixture, wherein the fixing seat 1 is fixedly installed with the main shaft of the machine tool through the installation groove 2, and the center hole 3 is coaxial with the main shaft, including the following steps:

[0070] Step S1: Fixing the fixture to the machine tool spindle

[0071] In this step, the fixture's fixed base 1 needs to be fixedly installed with the machine tool's spindle through the mounting slot 2 behind it. During the installation process, it is necessary to strictly ensure that the center of the mounting slot 2, the center hole 3, and the machine tool's spindle remain coaxial. This is because the center hole 3 will later serve as one of the benchmarks in the machining process, and its coaxiality with the spindle directly determines the positional accuracy of the subsequent machining holes. If coaxiality deviation occurs in this step, the positioning holes and mounting holes of the subsequent machining will have precision errors from the initial stage, which will affect the final performance of the valve body. After the installation is completed, the tightness of the connection between the fixed base 1 and the spindle needs to be checked with special tools to prevent the fixture from loosening due to factors such as vibration during the machining process.

[0072] Step S2: Adjustment of the position of the mobile seat

[0073] The core goal of adjusting the position of the movable seat on the fixed seat 1 is to make the center hole 3 coaxial with the positioning groove 11. Since the sliding plate 4 can slide along the length direction of the fixed seat 1, and its moving direction can pass through the center of the center hole 3, this provides a structural basis for precise adjustment. During adjustment, auxiliary calibration can be carried out with the help of the positioning device or special measuring tool on the machine tool, and the position of the sliding plate 4 can be gradually fine-tuned by observing the reading or positioning mark of the measuring tool. When the axis of the center hole 3 and the positioning groove 11 completely coincide, the position of the movable seat is fixed. The key to this step is to ensure the coaxiality of the two, which is a prerequisite for the subsequent coaxial processing of the positioning hole and the mounting hole through the positioning groove 11.

[0074] Step S3: Installation and clamping of the valve body

[0075] When placing the valve body between the fixed chuck 7 and the movable chuck 8, the positioning bosses 10 on the fixed chuck 7 and the movable chuck 8 must accurately enter the interior of the valve body. Since the diameter of the positioning boss 10 is equal to the inner diameter of the valve body, it can form an effective radial positioning for the valve body and limit the movement of the valve body in the horizontal direction. Subsequently, tighten the fastening nut 9 to move the fixed chuck 7 and the movable chuck 8 toward each other, applying an axial clamping force to the valve body. During the clamping process, it is necessary to control the tightening force of the fastening nut 9, to ensure that the valve body is firmly fixed to avoid displacement during processing, and to prevent deformation of the valve body due to excessive clamping force. After clamping is completed, check whether the valve body is in a horizontal and stable state to ensure that it does not shake during processing.

[0076] Step S4: Processing of positioning holes

[0077] After the machine tool is started, the spindle will drive the fixture and the fixed valve body to rotate together. The rotation speed needs to be reasonably set according to the material of the valve body, the processing accuracy requirements and the type of drill. The drill on the machine tool moves toward the valve body according to the preset feed parameters and begins to process the positioning hole on the valve body. During the processing, the axis of the drill must be consistent with the axis of the machine tool spindle. This is the key to ensuring the position accuracy of the positioning hole. Since the center hole 3, the positioning groove 11 and the spindle are coaxial at this time, and the valve body is stably fixed by the positioning boss 10 and the clamping force, the drill can accurately form a positioning hole that meets the size requirements on the valve body during the feeding process.

[0078] Step S5: Adjusting and re-fixing the valve body position

[0079] After completing the processing of the positioning hole, it is necessary to loosen the fastening nut 9 and adjust the position of the valve body. The specific operation is to rotate the valve body so that the processed positioning hole and the positioning groove 11 are coaxial. The adjustment of this step can be achieved through a special positioning tool. For example, a positioning pin that matches the size of the positioning hole is inserted into the positioning hole and the positioning groove 11. If the positioning pin can be inserted smoothly and there is no obvious gap, it means that the two are coaxial. After confirming the coaxiality, tighten the fastening nut 9 again to clamp and fix the valve body. The fixing requirements are consistent with step S3, which must ensure tightness and avoid deformation of the valve body. The purpose of this step is to use the positioning hole as a new benchmark to provide an accurate positioning reference for the subsequent processing of the mounting hole.

[0080] Step S6: Processing of mounting holes

[0081] After starting the machine tool, the spindle also drives the fixture and valve body to rotate. The rotation parameters can be kept consistent with those when machining the locating holes or adjusted appropriately according to the machining requirements of the mounting holes. The drill is fed into the valve body according to the set feed rate to machine the mounting hole on the valve body. Since the locating hole and the locating groove 11 are coaxial at this time, and the locating groove 11 remains coaxial with the center hole 3 and the spindle, the axis of the drill is consistent with the axis of the spindle, so the machined mounting hole can naturally remain coaxial with the locating hole. During the machining process, it is necessary to control the feed speed and cutting depth of the drill to ensure that the dimensional accuracy and surface roughness of the mounting hole meet the design requirements. At the same time, to avoid excessive temperature of the valve body due to continuous machining, cooling measures can be taken as needed.

[0082] Step S7: disassembly of the valve body

[0083] After machining the mounting holes, shut down the machine. Wait until the spindle and valve body have completely stopped rotating. Loosen the retaining nut 9 and remove the valve body from between the fixed chuck 7 and the movable chuck 8. During disassembly, exercise caution to avoid collision between the valve body and the fixture, which could damage or deform the machined holes. After removing the valve body, perform a preliminary visual inspection to check for surface defects in the positioning and mounting holes. Use specialized measuring tools to verify that the coaxiality of the two holes meets design standards. If any issues are found, analyze the cause and make adjustments during subsequent machining.

[0084] Through the above series of steps, the structural features of the specialized fixture and precise operating procedures effectively ensure the coaxiality of the mounting and locating holes on the valve body, meeting the precision requirements of valve body processing. Each step is interrelated and mutually influential. Deviations in any step may affect the final processing quality. Therefore, strict adherence to specifications is required in actual operation.

[0085] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

The cam is fixedly mounted on the front of the fixing plate and is adapted to move the fixing plate towards the rear of the fixing plate so as to enable the fixing plate to move relative to the fixing plate when the fixing plate is in a fixed position. The fixing seat is fixed to the main shaft of the machine tool through the mounting groove, and the center hole is coaxial with the main shaft, including the following steps: Step S1, install the fixture on the spindle of the machine tool, ensuring that the center hole of the mounting slot is coaxial with the spindle; Step S2: Adjust the position of the movable seat on the fixed seat so that the center hole and the positioning groove are coaxial; Step S3: Install the valve body between the fixed clamping plate and the movable clamping plate, and clamp and fix the valve body by tightening the nut; Step S4: Start the machine tool, the main shaft of the machine tool drives the fixture and the valve body to rotate, and the drilling tool on the machine tool moves toward the valve body to machine a positioning hole on the valve body; Step S5: After the positioning hole is processed, the position of the valve body is adjusted, and the valve body is rotated so that the positioning hole on the valve body is coaxial with the positioning groove, and the valve body is clamped and fixed by tightening the nut; Step S6: Start the machine tool, the main shaft of the machine tool drives the fixture and the valve body to rotate, and the drilling cutter on the machine tool moves toward the valve body to machine a mounting hole on the valve body that is coaxial with the positioning hole; Step S7: Complete the processing of the valve body and disassemble the valve body.

2. A valve body processing method according to claim 1, characterized in that: The fixing seat is provided with a sliding groove along its length direction, and the sliding plate is provided with a sliding block that is slidably matched with the sliding groove.

3. A valve body processing method according to claim 1, characterized in that: A movable groove is provided on the front side surface of the fixing seat along its length direction, a rotatable screw rod is provided in the movable groove, and a nut block connected with the screw rod is provided on the sliding plate.

4. A valve body processing method according to claim 3, characterized in that: A fixing plate is provided at one end of the fixing seat in the longitudinal direction, and a hole is provided on the fixing plate for the screw rod to pass through. A limit sleeve 1 and a limit sleeve 2 are fixedly connected to the screw rod. The limit sleeve 1 and the limit sleeve 2 are respectively located on both sides of the fixing plate. The limit sleeve 2 is located in the movable groove, and scale lines are provided on the outer side wall of the limit sleeve 1 along its circumference.

5. A valve body processing method according to claim 2, characterized in that: The sliding plate is provided with a fastening hole, the fastening hole is communicated with the sliding groove, and a fastening bolt is connected to the inner thread of the fastening hole.

6. A valve body processing method according to claim 1, characterized in that: A reinforcing plate connecting the sliding plate and the mounting plate is provided between the sliding plate and the mounting plate.

7. A valve body processing method according to claim 1, characterized in that: The mounting plate is provided with a hole connected to a screw rod, and a fastening screw sleeve is threadedly connected to the screw rod.

8. A valve body processing method according to claim 3, characterized in that: The sliding plate is provided with a notch groove adapted to be connected with the nut block, and the nut block is fixedly connected to the sliding plate by bolts.

9. A valve body processing method according to claim 1, characterized in that: The fixing seat is provided with a plurality of fixing holes penetrating the front and rear sides of the fixing seat along the circumference of the mounting groove.

Images