Positioning fixture for blank valve milling

Abstract

The utility model relates to a positioning fixture for milling a blank valve, which comprises a base table provided with a processing panel, a supporting and moving plate capable of vertically lifting is arranged on the base table, and the supporting and moving plate is positioned below the processing panel, the positioning fixture for milling the blank valve comprises the base table provided with the processing panel, and the supporting and moving plate capable of vertically lifting is arranged on the base table. The supporting and moving plate is located below the machining panel, an inward pushing assembly is arranged on the base table, two movable clamping components are connected to the supporting and moving plate, in the vertical rising process of the supporting and moving plate, the movable clamping components can make contact with the inward pushing assembly, and the inward pushing assembly applies horizontal pushing force to the movable clamping components rising vertically. The valve supporting and clamping device has the advantages that a blank valve can be supported and moved from a low position to a high position, the blank valve is clamped in the supporting and moving process, manual carrying is not needed, manual operation is not needed for clamping the blank valve, manpower is saved, supporting and clamping can be conducted synchronously, and machining efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of blank valve processing, and in particular relates to a positioning fixture for blank valve milling. Background Art

[0002] Some valve body workpieces such as valves are formed by a series of processes of processing a blank valve body. During the manufacturing process, the blank valve body needs to be machined. During the machining process, the blank valve body needs to be positioned to ensure that the blank valve body is in a stable state during the processing. In the prior art, a positioning fixture for valve body processing is disclosed, and the document number is: CN218110033U. This solution adjusts the distance between the clamping tools by driving a motor device to facilitate the positioning and clamping of the valve body. By setting a turntable and a rotating shaft, the valve body is turned over to improve work efficiency; by setting a fixing groove, a fixing block, a groove, a bayonet and a compression spring, the clamping tool is convenient for quick installation and disassembly, and the valve bodies of different sizes, models and shapes are convenient for positioning and clamping, thereby improving installation stability;

[0003] The above scheme can stably clamp the valve body to be processed, but before clamping the valve body, the staff is required to move the valve body to be processed from the ground to the mounting seat. Since the valve body is heavy, the labor intensity of the staff will increase and the processing efficiency of the valve body will be reduced. Utility Model Content

[0004] The utility model aims to provide a positioning fixture for milling a blank valve, which can support and move the blank valve and stably clamp the blank valve during the support and movement process.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a positioning fixture for milling a blank valve, comprising a base platform provided with a processing panel, a supporting plate which can be vertically lifted and lowered is provided on the base platform, and the supporting plate is located below the processing panel. The main structural points are that an inner push assembly is provided on the base platform, and two movable clamping members are connected to the supporting plate. During the vertical rising process of the supporting plate, the movable clamping member will contact the inner push assembly, and the inner push assembly applies a horizontal thrust to the vertically rising movable clamping member; the movable clamping member comprises a side hanging arm, which is fixedly connected to the supporting plate, and a clamping positioning rod is slidably connected to the side hanging arm, one end of the clamping positioning rod is connected to a clamping piece, and the other end is connected to an anti-slip disk, and the anti-slip disk can contact the inner push assembly; the inner push assembly comprises an oblique push arm, and a path channel is provided on the oblique push arm. When the clamping positioning rod rises, its end can move along the path channel, and during the movement, the clamping piece moves in a direction close to the blank valve; a rectangular notch is provided on the processing panel, and the blank valve can extend from the rectangular notch.

[0006] Furthermore, the inner push assembly also includes a vertical arm, the upper end of the vertical arm is connected to the lower end of the diagonal support arm, and the lower end of the vertical arm is fixed to the base platform.

[0007] Furthermore, a hydraulic cylinder is arranged on the base platform, the upper end of the hydraulic cylinder is fixed to the supporting plate, and the hydraulic cylinder controls the vertical lifting and lowering of the supporting plate.

[0008] Furthermore, the supporting plate is a rectangular plate, the side hanging arms are fixed on both sides of the supporting plate close to the inclined push arms, the upper surface of the supporting plate is provided with a placement area, and the blank valve is placed in the placement area.

[0009] Furthermore, a sliding channel is provided on the side suspension arm, and the sliding channel passes through the side suspension arm. The clamping positioning rod is slidably connected in the sliding channel and can slide in the sliding channel.

[0010] Furthermore, a return spring is sleeved on the clamping positioning rod, the return spring is located between the side suspension arm and the clamping piece, and two ends of the return spring are fixedly connected to the side suspension arm and the clamping piece respectively.

[0011] Furthermore, the clamping positioning rod includes an outer sleeve and an inner moving rod. The outer sleeve is sleeved on the inner moving rod. A compression return spring is arranged in the outer sleeve. One end of the compression return spring is fixed to the inner wall of the outer sleeve, and the other end is fixed to the end of the inner moving rod.

[0012] Furthermore, the clamping positioning rod is connected to a vertical extension column, which is arranged parallel to the upright arm and fixedly connected to the anti-slip disc.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: in the process of the hydraulic cylinder controlling the support plate to rise, the inner push assembly and the movable clamping member cooperate to enable the movable clamping member to clamp the blank valve on the support plate; wherein, by setting the oblique push arms, the distance between the upper ends of the oblique push arms is smaller than the distance between the lower ends of the oblique push arms, so that the movable horizontal length of the clamping positioning rods gradually decreases during the vertical rise process, thereby approaching each other; by setting the path channel and the sliding channel, it can be ensured that the clamping positioning rods can always rise vertically and approach in a straight line without deviation and shaking; at the same time, a rectangular notch is set on the processing panel, and when the clamping positioning rod cooperates in the path channel and moves to the upper end of the path channel, the upper surface of the clamped blank valve can be extended from the rectangular notch, so that it is convenient to process it;

[0014] The utility model can support and move the blank valve from a low position to a high position, and clamp the blank valve during the support and movement process. No manual handling is required, and no manual operation is required to clamp the blank valve, which saves manpower. The support and movement and clamping can be performed simultaneously, thereby improving processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a schematic diagram of the overall structure of the utility model in the initial state;

[0016] Figure 2 It is a schematic diagram of the overall structure of the utility model in the processing state;

[0017] Figure 3 It is a side view structural diagram of the movable clamping member of the utility model;

[0018] Figure 4 This is a schematic diagram of the main structure of the movable clamping component of the utility model;

[0019] Figure 5 It is a schematic diagram of the connection structure between the movable clamping member and the oblique push arm in the processing state of the utility model;

[0020] Figure 6 It is a structural schematic diagram of the processing state of a blank valve of a larger specification in another embodiment;

[0021] Figure 7 It is a structural schematic diagram of the processing state of a blank valve of smaller specifications in another embodiment;

[0022] Figure 8 is a schematic cross-sectional view of a clamping and positioning rod structure of another embodiment;

[0023] Fig. 9 is a schematic diagram of the overall structure of the second embodiment;

[0024] Among them, 1-base platform, 2-support plate, 3-placing area, 4-inner push assembly, 5-movable clamping component, 6-hydraulic cylinder, 7-side boom, 8-clamping positioning rod, 9-sliding channel, 10-sliding rod, 11-clamping piece, 12-anti-slip disk, 13-return spring, 14-upright arm, 15-oblique push arm, 16-path channel, 17-processing panel, 18-support arm, 19-rectangular slot, 20-outer sleeve, 21-inner move rod, 22-compression return spring, 23-vertical extension column, 24-displacement screw, 25-locking disk. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various configurations. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the utility model. In the embodiment, the components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but only represents the selected embodiments of the present application.

[0026] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be an electrical connection; it can be a hydraulic oil circuit connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] See also Figures 1 to 5 As shown, a positioning fixture for milling a blank valve comprises a horizontally arranged base platform 1, a driving component is arranged on the base platform 1, the upper end of the driving component is connected with a supporting plate 2, the upper surface of the supporting plate 2 is provided with a placing area 3, the blank valve can be placed in the placing area 3 on the supporting plate 2, the driving component can drive the supporting plate 2 to rise and fall vertically, and during the lifting process, the blank valve is sent to a suitable height for processing, an inner push component 4 is also symmetrically arranged on the base platform 1, and a movable clamping member 5 is connected to the supporting plate 2, during the vertical lifting of the supporting plate 2, the movable clamping member 5 will contact the inner push component 4, and the inner push component 4 will push the movable clamping member 5 to contact the blank valve on the supporting plate 2, thereby realizing the clamping of the blank valve in the process of supporting the blank valve to a suitable processing height. Such a setting avoids the need to manually control the clamping of the blank valve after the blank valve is transported to a suitable height, thereby saving processes and time.

[0028] The above-mentioned driving component is a hydraulic cylinder 6, and the supporting plate 2 is connected to the piston rod of the hydraulic cylinder 6. The supporting plate 2 is a rectangular plate. The hydraulic cylinder 6 can control the supporting plate 2 to stably perform vertical lifting and lowering. The movable clamping member 5 is symmetrically arranged on the supporting plate 2. The movable clamping member 5 is set as two and has the same structure. The movable clamping member 5 includes a side hanging arm 7, and the side hanging arm 7 is fixedly connected to the two sides of the supporting plate 2 close to the inner push component 4. The side hanging arm 7 is curved in an arc shape, and the upper end of the side hanging arm 7 is higher than the supporting plate 2. A clamping positioning rod 8 is slidably connected to each side hanging arm 7. When the hydraulic cylinder 6 controls the supporting plate 2 to rise vertically, the clamping positioning rod 8 rises accordingly. In this process, the clamping positioning rod 8 will contact the inner push component 4. As the supporting plate 2 continues to rise, the clamping positioning rod 8 is horizontally pushed by the inner push component 4 during the process of rising, so that the two clamping positioning rods 8 slide along their length direction and approach each other until the blank valve in the placement area 3 is clamped. Specifically:

[0029] A sliding channel 9 is provided on the side suspension arm 7, and the sliding channel 9 includes a circular opening and a strip opening. The strip opening is symmetrically distributed on the outside of the circular opening and is connected to the circular opening. The clamping and positioning rod 8 is matched in the circular opening. The clamping and positioning rod 8 is connected with a sliding rod 10 matched with the strip opening. The sliding rod 10 extends along the length direction of the clamping and positioning rod 8, and the sliding rod 10 can pass through the corresponding strip opening. During the sliding process, the cooperation between the sliding rod 10 and the strip opening can make the clamping and positioning rod 8 always maintain horizontal sliding without tilting; at this time, the ends of the two clamping and positioning rods 8 that are close to each other are respectively connected with a clamping piece 11, and the two clamping pieces 11 can cooperate to clamp the blank valve, and the ends of the two clamping and positioning rods 8 that are far away from each other are respectively connected with an anti-slip disk 12 to prevent the clamping and positioning rod 8 from separating from the side suspension arm 7;

[0030] The return spring 13 is also sleeved on the clamping positioning rod 8. The return spring 13 can generate a restoring force when stretched. The return spring 13 is arranged between the side suspension arm 7 and the clamping piece 11 on the same side. One end of the return spring 13 is fixedly connected to the side suspension arm 7, and the other end is fixedly connected to the clamping piece 11. When the hydraulic cylinder 6 controls the supporting plate 2 to rise vertically, the clamping positioning rod 8 will contact the inner push component 4 and be pushed by it. In the process that the two clamping positioning rods 8 approach each other, the return spring 13 is stretched to generate a restoring force until the clamping piece 11 forms a large clamping force on the blank valve, so that the blank valve is stably clamped. After the processing of the blank valve is completed, when the hydraulic cylinder 6 controls the supporting plate 2 to descend vertically, the clamping positioning rod 8 is no longer pushed by the inner push component 4, but is gradually reset under the action of the restoring force of the return spring 13. At the same time, in this process, the clamping force of the clamping piece 11 on the blank valve gradually disappears, which is convenient for removing the blank valve.

[0031] The number of the inner push components 4 is the same as that of the clamping and positioning rods 8. The inner push component 4 includes an upright arm 14 and an oblique push arm 15. The lower end of the upright arm 14 is fixed on the base platform 1, and the oblique push arm 15 is fixed to the upper end of the corresponding upright arm 14. The oblique push arm 15 extends directly above the center position of the supporting plate 2. Since there are two clamping and positioning rods 8, the upper ends of the two oblique push arms 15 are close to each other, that is, at this time, the distance between the lower ends of the two oblique push arms 15 is greater than the distance between the upper ends of the two oblique push arms 15. A path channel 16 is opened on the surface where the oblique push arms 15 contact the clamping and positioning rod 8. The path channel 16 extends along the length direction of the oblique push arms 15. The end of the clamping and positioning rod 8 connected to the anti-slip disk 12 can enter the path channel 16 and move along the path channel 16. The lower end of the path channel 16 is an opening, and the clamping and positioning rod 8 enters the path channel 16 from this opening. The upper end of the path channel 16 is closed, and the clamping and positioning rod When the valve body 10 moves to the upper end of the path channel 16, it has reached the maximum lifting height and cannot move further upward. At this time, a processing panel 17 is arranged at the upper end of the inclined push arm 15, and the processing panel 17 is fixed to the base platform 1 through the support arm 18. A rectangular notch 19 is provided on the processing panel 17, and the upper end of the inclined push arm 15 is located in the rectangular notch 19. When the blank valve is driven to rise by the supporting plate 2, the end of the clamping and positioning rod 8 moves synchronously in the path channel 16 and is pushed by the inclined push arm 15 until the blank valve is firmly clamped by the clamping piece 11, and the clamping and positioning rod 8 is always located below the rectangular notch 19 during the process. When the clamping and positioning rod 8 moves to the upper end of the path channel 16 and cannot continue to rise, the blank valve reaches the specified processing position and is subjected to the maximum clamping force, forming the most firmly clamped. At this time, the upper surface of the blank valve passes through the rectangular notch 19 and is located above the rectangular notch 19, so the upper surface of the blank valve can be directly processed.

[0032] In the initial state, the horizontal height of the inclined push arm 15 is higher than the horizontal height of the supporting plate 2, and the return spring 13 is in a relaxed state. When the blank valve needs to be processed, the blank valve to be processed is placed in the placement area 3 on the supporting plate 2, and then the supporting plate 2 is controlled to rise vertically by the hydraulic cylinder 6 until the clamping positioning rod 8 contacts the inclined push arm 15 and enters the path channel 16 to move. As the supporting plate 2 continues to rise, the clamping positioning rod 8 rises along the path channel 16. In this process, the inclined push arm 15 generates a horizontal thrust on the clamping positioning rod 8. This thrust can make the clamping positioning rod 8 approach each other along the sliding channel 9 on the side boom 7, and then make the clamping pieces 11 approach each other, and this thrust causes the return spring 13 to be stretched to generate a restoring force until the clamping piece 11 contacts the blank valve in the placement area 3. As the thrust continues, the contact between the clamp 11 and the blank valve gradually changes to a firm clamp, and the clamping positioning rod 8 also moves to the uppermost end of the path channel 16. At this time, the upper surface of the blank valve is located above the processing panel 17, and the upper surface of the blank valve can be processed. After the processing is completed, the hydraulic cylinder 6 controls the vertical descent of the support plate 2. During the descent, the clamping positioning rod 8 moves downward along the path channel 16. During this process, the thrust generated by the inclined push arm 15 on the clamping positioning rod 8 gradually decreases until the clamping positioning rod 8 is separated from the path channel 16, and the thrust disappears. The corresponding clamping force of the clamp 11 on the blank valve also gradually decreases until it disappears, and the return spring 13 also returns to the initial relaxed state under the action of its own restoring force, and the processed blank valve can be removed from the support plate 2.

[0033] See also Figures 6 to 8 As shown, another embodiment of the utility model, in the above structure, the clamping and positioning rod 8 is of fixed length. When the blank valve specification is small, it is easy for the clamping and positioning rod 8 to move to the uppermost end of the path channel 16, and the clamping piece 11 still does not contact the blank valve and form a firm clamp. If the blank valve specification is large, it is easy for the clamping and positioning rod 8 to move to the middle of the path channel 16, and the clamping piece 11 has already formed a firm clamp on the blank valve, and at this time the upper surface of the blank valve is still below the rectangular notch 19, and the blank valve cannot be processed; in order to avoid the above situation, so that blank valves of various specifications can be firmly clamped, and can also be sent to the top of the rectangular notch 19 by the supporting plate 2, which is convenient for processing, the clamping and positioning rod 8 is set to a rod body with a variable length, the upper end of the path channel 16 is also set to an opening, and the return spring 13 is removed. Specifically:

[0034] The clamping and positioning rod 8 includes an outer sleeve 20 and an inner moving rod 21. The inner moving rod 21 is a solid rod. The outer sleeve 20 is sleeved on the inner moving rod 21. A compression return spring 22 is arranged in the outer sleeve. One end of the compression return spring 22 is fixed to the inner wall of the outer sleeve 20, and the other end is fixed to the end of the inner moving rod 21. The diameter of the inner moving rod 21 is smaller than the inner diameter of the outer sleeve 20. The end of the inner moving rod 21 connected to the compression return spring 22 can enter the outer sleeve 20. In the initial state, the compression return spring 22 is in a relaxed state. The sum of the lengths of the outer sleeve 20 and the inner moving rod 21 is the maximum length of the clamping and positioning rod 8. When the compression return spring 22 reaches the maximum compression amount, the inner moving rod 21 completely enters the outer sleeve 20. At this time, the clamping and positioning rod 8 is the minimum length, that is, the minimum length of the clamping and positioning rod 8 is the length of the outer sleeve 20.

[0035] For a larger-sized blank valve, in the initial state, the clamping piece 11 is not in contact with the blank valve. When the support plate 2 rises, the clamping positioning rod 8 enters the path channel 16, and the oblique push arm 15 applies a thrust to the clamping positioning rod 8 to approach each other, so that the clamping piece 11 contacts the blank valve. Then the support plate 2 continues to rise, and the oblique push arm 15 continues to apply the thrust. At this time, the outer sleeve 20 is moved by the thrust, and the inner moving rod 21 is blocked by the blank valve in contact with the clamping piece 11 and cannot move with the outer sleeve 20, so that the compression return spring 22 is compressed to generate a return force. The return force acts on the clamping piece 11, so that the clamping piece 11 forms a clamping force on the blank valve. In this process, the length of the clamping positioning rod 8 is shortened, and the support plate 2 continues to rise until the upper surface of the blank valve extends out of the rectangular notch 19 for processing.

[0036] For smaller-sized blank valves, a vertical extension column 23 is connected to the clamping positioning rod 8. The vertical extension column 23 is arranged parallel to the upright arm 14 and fixedly connected to the anti-slip disk 12. In the initial state, the clamping piece 11 also does not contact the blank valve. As the supporting plate 2 rises, the clamping positioning rod 8 enters the path channel 16, so that the clamping pieces 11 approach each other to clamp the blank valve. When the clamping positioning rod 8 moves to the upper end of the path channel 16, the blank valve is still located below the rectangular slot 19. At this time, the supporting plate 2 is controlled to continue to rise, the clamping positioning rod 8 is separated from the path channel 16, and the vertical extension column 23 contacts the upper end of the path channel 16. At this time, the clamping positioning rod 8 extends out from the rectangular slot 19 and is higher than the rectangular slot 19 until the blank valve extends out of the rectangular slot 19 for processing.

[0037] See also Fig. 9As shown, another embodiment of the utility model, the length of the clamping positioning rod 8 is still fixed, and the horizontal position of the oblique push arm 15 is changed to adapt to blank valves of different specifications. Specifically: the upright arm 14 is removed, and the displacement screw 24 is connected to the oblique push arm 15. The displacement screw 24 passes through the support arm 18. When the displacement screw 24 is slid, the displacement screw 24 can produce horizontal displacement. The horizontal position of the oblique push arm 15 can be adjusted by sliding the displacement screw 24. At the same time, a locking disk 25 is screwed on the displacement screw 24. There are two locking disks 25, one of which is located between the support arm 18 and the oblique push arm 15, and the other is located outside the support arm 18. After the sliding displacement screw 24 makes the oblique push arm 15 reach a suitable position, the locking disk 25 can be screwed to make both locking disks 25 contact with the support arm 18.

[0038] For larger blank valves, the sliding displacement screw 24 can be used to move the oblique push arm 15 toward the support arm 18. At this time, the length of the clamping positioning rod 8 passing through the path channel 16 will become shorter, and the distance between the two clamps 11 will become larger, so that the larger blank valve can be clamped; for smaller blank valves, the sliding displacement screw 24 can be used to move the oblique push arm 15 away from the support arm 18, and the length of the clamping positioning rod 8 passing through the path channel 16 will become longer, so that the distance between the two clamps 11 will become smaller, and the smaller blank valve can be clamped.

[0039] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A positioning fixture for milling a blank valve, comprising a base table provided with a processing panel, a vertically liftable support plate provided on the base table, the support plate being located below the processing panel, characterized in that: The base platform is provided with an inner push assembly, and two movable clamping members are connected to the support plate. When the support plate is vertically ascending, the movable clamping member will contact the inner push assembly, and the inner push assembly applies a horizontal thrust to the movable clamping member that is vertically ascending; The movable clamping member comprises a side suspension arm, which is fixedly connected to the supporting plate, and a clamping positioning rod is slidably connected to the side suspension arm, one end of the clamping positioning rod is connected to a clamping piece, and the other end is connected to an anti-slip disk, and the anti-slip disk can contact the inner push assembly; The inner push assembly includes an oblique push arm, on which a path channel is provided. When the clamping and positioning rod rises, its end portion can move along the path channel, and during the movement, the clamp moves toward the direction of the blank valve; The processing panel is provided with a rectangular notch, and the blank valve can extend from the rectangular notch.

2. A positioning fixture for milling a blank valve according to claim 1, characterized in that: The inner push assembly also includes an upright arm, the upper end of the upright arm is connected to the lower end of the diagonal support arm, and the lower end of the upright arm is fixed to the base platform.

3. A positioning fixture for milling a blank valve according to claim 2, characterized in that: The base platform is provided with a hydraulic cylinder, the upper end of which is fixed to the supporting plate, and the hydraulic cylinder controls the vertical lifting and lowering of the supporting plate.

4. A positioning fixture for milling a blank valve according to claim 3, characterized in that: The supporting plate is a rectangular plate, and the side hanging arms are fixed on both sides of the supporting plate close to the oblique push arms. The upper surface of the supporting plate is provided with a placement area, and the blank valve is placed in the placement area.

5. A positioning fixture for milling a blank valve according to claim 1 or 4, characterized in that: The side suspension arm is provided with a sliding channel, the sliding channel passes through the side suspension arm, and the clamping positioning rod is slidably connected in the sliding channel and can slide in the sliding channel.

6. A positioning fixture for milling a blank valve according to claim 5, characterized in that: The clamping and positioning rod is sleeved with a return spring, which is located between the side suspension arm and the clamping piece, and the two ends of the return spring are respectively fixedly connected to the side suspension arm and the clamping piece.

7. The positioning fixture for milling a blank valve according to claim 1, characterized in that: The clamping positioning rod comprises an outer sleeve and an inner moving rod. The outer sleeve is sleeved on the inner moving rod. A compression return spring is arranged in the outer sleeve. One end of the compression return spring is fixed to the inner wall of the outer sleeve, and the other end is fixed to the end of the inner moving rod.

8. The positioning fixture for milling a blank valve according to claim 7, characterized in that: The clamping positioning rod is connected to a vertical extension column, which is arranged parallel to the upright arm and fixedly connected to the anti-slip disc.

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