Valve ball drilling tool

Abstract

The utility model belongs to valve machining technical field, especially point to a kind of valve ball drilling tool;Including pedestal, still include: driving part, be located on pedestal, driving part has the push rod of vertical arrangement;Mounting table, vertical be located on pedestal, and the side of mounting table close to driving part is equipped with transverse notch;Limiting strip, be located in transverse notch, limiting strip has the insertion part of being inserted in transverse notch and the extension part of extending from transverse notch;Positioning through-hole, along vertical be equipped in the extension part of limiting strip, positioning through-hole is passed through drill bit and is coaxially arranged with push rod;At least one locking member, be located in the top of mounting table, for the insertion part of limiting strip is locked in transverse notch;Profiling pit, respectively be equipped in the bottom surface of limiting strip extension part and the top surface of push rod, for with the upper and lower surface of valve ball is attached to position valve ball.The utility model can obtain a kind of valve ball drilling tool by the above technical scheme, which is accurate in clamping and positioning, and can ensure the coaxiality of drilling.

Description

Technical Field

[0001] This utility model belongs to the field of valve processing technology, and specifically refers to a valve ball drilling tool. Background Technology

[0002] The ball is the core moving part of a ball valve, and the machining accuracy of its valve stem positioning hole directly determines the opening and closing accuracy and sealing effect of the ball valve. The ball drilling tool, as a special equipment for machining the ball positioning hole, is widely used in valve manufacturing.

[0003] Existing valve ball drilling fixtures mostly employ side clamping or simple lifting clamping methods, lacking spherical adaptation positioning structures and dedicated drilling guide and limiting structures. After clamping, the valve ball is prone to shaking and displacement, failing to ensure that the drill hole axis coincides with the valve ball center, severely affecting the assembly accuracy and performance of the valve ball. Therefore, there is an urgent need for a valve ball drilling fixture that provides accurate clamping and positioning and ensures drill hole coaxiality. Utility Model Content

[0004] This invention solves the problems mentioned in the background art by setting a driving component with a vertical push rod, a mounting platform with a horizontal groove, a limiting strip with a positioning through hole, and upper and lower contoured recesses, and using a locking component to fix the limiting strip, thereby achieving accurate clamping and positioning of the valve ball and ensuring the coaxiality of the drilling.

[0005] The purpose of this utility model is achieved as follows: a valve ball drilling tool, including a base, and further comprising:

[0006] A driving component, disposed on the base, the driving component having a vertically arranged push rod;

[0007] The mounting platform is vertically mounted on the base, and a horizontal slot is provided on the side of the mounting platform near the driving component.

[0008] A limiting strip is provided in the transverse groove, the limiting strip having an insert portion that is inserted into the transverse groove and an extend portion that extends out of the transverse groove;

[0009] A positioning through hole is vertically formed at the protrusion of the limiting strip. The positioning through hole allows the drill bit to pass through and is coaxially arranged with the push rod.

[0010] At least one locking element is provided on the top of the mounting platform for locking the extension portion of the limiting strip in the transverse groove;

[0011] Contouring recesses are respectively formed on the bottom surface of the protruding part of the limiting strip and the top surface of the push rod, and are used to fit against the upper and lower surfaces of the valve ball to position the valve ball.

[0012] The present invention is further configured such that the driving component is a driving cylinder, and the push rod is the piston rod of the driving cylinder.

[0013] The present invention is further configured such that the locking component is a clamping bolt, and the top of the mounting platform is provided with a threaded hole adapted to the clamping bolt.

[0014] The present invention is further configured such that the bottom of the clamping bolt is provided with a clamping part, and the extension part of the limiting strip is provided with a positioning groove corresponding to the clamping part, and the clamping part can be inserted into the positioning groove to position the limiting strip.

[0015] The present invention is further configured such that the two contoured recesses are spherical recesses adapted to the spherical surface of the valve ball.

[0016] The present invention is further configured such that the axes of the two contoured recesses coincide with the axis of the positioning through hole.

[0017] The present invention is further configured such that the transverse groove is a T-shaped groove or a dovetail groove, and the extension portion of the limiting strip is provided with a guide portion that slides with the transverse groove.

[0018] By adopting the above technical solution, the beneficial effects that this utility model can achieve are:

[0019] 1. The valve ball achieves self-centering through the matching of the push rod and the contoured recess of the limit strip. Combined with the coaxial arrangement of the positioning through hole and the push rod, the machining accuracy of the valve ball positioning hole is improved.

[0020] 2. The limiting strip is locked in the transverse groove by the locking device to prevent the limiting strip from moving or shifting, thus improving the stability of the drilling process.

[0021] 3. The push rod, driven by the drive unit, lifts the valve ball and automatically fits into the contoured recess of the limit strip. With the help of the locking component, it is quickly fixed, simplifying the clamping operation process and improving the machining efficiency of drilling the valve ball. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 This is a first cross-sectional structural diagram of the present invention;

[0024] Figure 3 This is a schematic diagram of the second cross-sectional structure of this utility model.

[0025] The reference numerals in the figure are as follows: 1. Base; 2. Drive component; 3. Push rod; 4. Mounting platform; 5. Horizontal groove; 6. Limiting strip; 7. Insertion part; 8. Extension part; 9. Positioning through hole; 10. Drill bit; 11. Locking component; 12. Contour recess; 13. Valve ball; 14. Threaded hole; 15. Pressing part; 16. Positioning groove; 17. Guide part. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-3 :

[0027] Example 1:

[0028] This embodiment provides a valve ball drilling fixture, including a base 1, and further comprising:

[0029] The driving component 2 is disposed on the base 1, and the driving component 2 has a vertically arranged push rod 3;

[0030] Mounting platform 4 is vertically mounted on the base 1, and a horizontal slot 5 is provided on the side of the mounting platform 4 near the driving component 2.

[0031] A limiting strip 6 is provided in the transverse groove 5. The limiting strip 6 has an insert 7 that is inserted into the transverse groove 5 and an extendable part 8 that extends out of the transverse groove 5.

[0032] A positioning through hole 9 is vertically opened at the protrusion 8 of the limiting strip 6. The positioning through hole 9 allows the drill bit 10 to pass through and is arranged coaxially with the push rod 3.

[0033] At least one locking element 11 is provided on the top of the mounting platform 4 for locking the extension portion 7 of the limiting strip 6 into the transverse groove 5.

[0034] The contoured recesses 12 are respectively formed on the bottom surface of the protruding part 8 of the limiting strip 6 and the top surface of the push rod 3, and are used to fit with the upper and lower surfaces of the valve ball 13 to position the valve ball 13.

[0035] This tooling is used for machining the valve stem positioning hole on the valve ball 13. The whole assembly consists of a base 1, a drive component 2, a mounting platform 4, a limit bar 6, and a locking component 11. After the components are accurately assembled in the preset position, they cooperate with each other to complete the positioning, clamping, and drilling operations of the valve ball 13.

[0036] The base 1 is a plate-shaped structure placed at the bottom of the entire fixture. Its top surface is machined with two sets of threaded holes 14 corresponding to the drive component 2 and the mounting platform 4. The drive component 2 is aligned with the threaded holes 14 on the top surface of the base 1 through the mounting flange at the bottom, and is fixed by screwing fastening bolts through the flange holes into the threaded holes 14 of the base 1. The mounting platform 4 has mounting holes at the bottom that match the base 1, and is also connected to the other set of threaded holes 14 on the top surface of the base 1 through fastening bolts. The drive component 2 and the mounting platform 4 are arranged adjacent to each other on the base 1. The base 1 provides a stable assembly bearing foundation for all components through its own rigidity, ensuring the overall structural stability of the fixture.

[0037] The driving component 2 uses a driving cylinder as the specific implementation structure, which is fixed on the top surface of the base 1 near the mounting platform 4. The bottom of the cylinder body of the driving cylinder is bolted to the base 1 through the mounting flange. The piston rod inside the cylinder body is arranged vertically to form the push rod 3 of the tooling. The piston rod and the cylinder body are slidably sealed together through a sealing element. After the driving cylinder is connected to the air circuit system, it can drive the piston rod to perform reciprocating linear lifting and lowering motion in the vertical direction, providing stable vertical power for the fitting and positioning of the valve ball 13.

[0038] The push rod 3 is the piston rod of the driving cylinder. It is a solid rod-shaped component that extends vertically. Its top end is welded and fixed to the piston inside the cylinder and moves vertically in sync with the piston. The top surface of the push rod 3 is milled with a contoured recess 12 by a CNC milling machine. This recess is a spherical recess that matches the spherical surface of the valve ball 13. The surface accuracy of the recess is ensured by the running trajectory of the milling tool. It is used to fit tightly with the lower surface of the valve ball 13 to form the positioning support structure of the lower part of the valve ball 13.

[0039] Mounting platform 4 is a vertically extending block structure, which is vertically fixed to the top surface of base 1 by fastening bolts at the bottom. On the side of mounting platform 4 near the drive component 2, a transverse groove 5 is milled in the horizontal direction. The transverse groove 5 can be a T-slot or dovetail groove structure. The top of mounting platform 4 has a threaded hole 14 that runs through the transverse groove 5 in the vertical direction. The diameter of the threaded hole 14 matches the outer diameter of the locking component 11. Mounting platform 4 provides space for the assembly and sliding of the limit strip 6, and also provides a reliable threaded connection base for the locking component 11.

[0040] The transverse groove 5 is a groove-shaped structure extending in the horizontal direction. The groove wall is ground to ensure flatness. The groove width and the thickness of the insertion part 7 of the limiting strip 6 are in clearance fit, which can allow the limiting strip 6 to slide smoothly without excessive shaking. The length of the groove is slightly longer than the length of the insertion part 7 of the limiting strip 6, leaving room for adjusting the position of the limiting strip 6. The transversely extending groove structure makes it convenient for the limiting strip 6 to be directly inserted or removed from the side.

[0041] The limiting strip 6 is a long strip structure, made entirely of metal, and consists of an integrally formed indentation 7 and an extension 8. The width of the indentation 7 is adapted to the transverse slot 5, and its outer side is integrally formed with a guide 17 corresponding to the shape of the transverse slot 5. When the transverse slot 5 is a T-slot, the guide 17 is a T-shaped boss; when the transverse slot 5 is a dovetail slot, the guide 17 is a dovetail boss. The guide 17 fits against the inner wall of the transverse slot 5, forming a smooth sliding fit. This guiding fit restricts the limiting strip 6 from disengaging from the transverse slot 5 in the vertical direction, allowing the limiting strip 6 to move only in the horizontal direction along the transverse slot 5. The extension 8 extends out from the outside of the transverse slot 5, and is located directly above the push rod 3 of the drive component 2. The bottom surface of the protruding part 8 of the limiting strip 6 is milled with a contoured recess 12, which is also a spherical recess that matches the spherical surface of the valve ball 13. The protruding part 8 is drilled with a through positioning hole 9 in the vertical direction. The limiting strip 6 can be detachably assembled by the cooperation of the guide part 17 of the extension part 7 and the transverse groove 5. The contoured recess 12 of the protruding part 8 is used to fit with the upper surface of the valve ball 13 to form the positioning structure on the upper part of the valve ball 13.

[0042] The positioning through hole 9 is a circular hole that passes through the protrusion 8 of the limiting strip 6. Its axis is aligned with the axis of the push rod 3, ensuring that the tool always feeds along the center of the valve ball 13 during drilling. During assembly, the coaxial alignment of the positioning through hole 9 and the axis of the push rod 3 can be achieved by adjusting the horizontal position of the limiting strip 6 within the transverse slot 5. After alignment, the limiting strip 6 is fixed by the locking element 11. The inner wall of the positioning through hole 9 is smooth, which is used to constrain the movement path of the drilling tool and prevent tool deviation.

[0043] The locking element 11 is a clamping bolt. The threaded hole 14 on the top of the mounting platform 4 is a through-hole type. The number of locking elements 11 can be set to one or more according to the length of the limiting strip 6. Multiple locking elements 11 are distributed at intervals along the extension direction of the transverse slot 5 to adapt to the locking requirements of limiting strips 6 of different lengths. The clamping bolt is screwed into the threaded hole 14 from the top of the mounting platform 4 to form a threaded connection with the threaded hole 14. The bottom of the clamping bolt is integrally machined with a cylindrical clamping part 15. The top surface of the extension part 7 of the limiting strip 6 corresponds to the position of the clamping part 15 and is milled with a circular positioning slot 16. The diameter of the positioning slot 16 is clearance-fitted with the outer diameter of the clamping part 15. When the clamping bolt is tightened, the bolt moves downward along the threaded hole 14, and the bottom clamping part 15 gradually inserts into the positioning groove 16 of the limiting strip 6. Through the insertion and engagement of the boss and the groove, the extension part 7 of the limiting strip 6 is firmly fixed inside the transverse groove 5, which not only prevents the limiting strip 6 from moving laterally, but also prevents it from falling off vertically.

[0044] The contoured recesses 12 are machined on the bottom surface of the protruding part 8 of the limiting strip 6 and the top surface of the push rod 3, respectively. Both are inwardly recessed spherical structures. CNC machining ensures that the curved surface contours perfectly match the spherical surface of the valve ball 13 to be machined. The axes of the two contoured recesses 12 are completely coincident with the axis of the positioning through hole 9. After assembly, they are tightly fitted to the upper and lower surfaces of the valve ball 13, respectively. The curved surface contact fully limits the position of the valve ball 13, ensuring that the center of the valve ball 13 is accurately aligned with the axis of the positioning through hole 9. During assembly, the position of the limiting strip 6 can be finely adjusted to keep the axes of the two contoured recesses 12 and the positioning through hole 9 collinear, achieving axis alignment without additional alignment fixtures.

[0045] During the processing operation, first slide the extension 7 of the limiting strip 6 into the side of the transverse groove 5 of the mounting table 4, so that the guide 17 fits against the groove wall. Adjust the front and back position of the limiting strip 6 so that the positioning through hole 9 is directly opposite the push rod 3 below. Then, use a wrench to turn the clamping bolt on the top of the mounting table 4 until the clamping part 15 at the bottom of the bolt is fully inserted into the positioning groove 16 of the limiting strip 6, thus fixing the position of the limiting strip 6. Next, start the drive cylinder to move the push rod 3 upward to the preset clamping position, and place the valve ball 13 to be processed on the contoured recess 12 on the top surface of the push rod 3 so that the lower surface of the valve ball 13 fits completely against the recess. Continue to circulate air through the drive cylinder to drive the push rod 3 to rise slowly until the upper surface of the valve ball 13 fits tightly against the contoured recess 12 on the bottom surface of the extension 8 of the limiting strip 6. The clamping force of the valve ball 13 is provided by the vertical lifting force of the drive component 2. The continuous lifting force ensures that the valve ball 13 does not shift during processing. At this time, the valve ball 13 is clamped and positioned by the upper and lower contoured recesses 12, and the center of the ball is completely aligned with the axis of the positioning through hole 9. Finally, the drilling tool is inserted from above the positioning through hole 9, and the drilling equipment is started to feed the tool downward along the inner wall of the positioning through hole 9, thus machining the valve stem positioning hole at the preset position of the valve ball 13. After machining, the drilling equipment is turned off, the drive cylinder is controlled to exhaust air, and the push rod 3 drives the valve ball 13 to move downward. The valve ball 13 separates from the contoured recesses 12 of the limit strip 6, and the machined valve ball 13 can be directly removed to start the next machining operation. If it is necessary to machine valve balls 13 of different specifications, simply loosen the clamping bolt, pull out the original limit strip 6, replace it with a limit strip 6 with the corresponding specification contoured recesses 12 and positioning through holes 9, and then tighten it again.

[0046] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A valve ball drilling fixture, comprising a base (1), characterized in that, Also includes: A driving member (2) is provided on the base (1), and the driving member (2) has a vertically arranged push rod (3); Mounting platform (4) is vertically mounted on the base (1), and a horizontal slot (5) is provided on the side of the mounting platform (4) near the driving component (2). A limiting strip (6) is provided in the transverse slot (5). The limiting strip (6) has an insertion part (7) that is inserted into the transverse slot (5) and an extension part (8) that extends out of the transverse slot (5). A positioning through hole (9) is vertically opened at the protrusion (8) of the limiting strip (6). The positioning through hole (9) allows the drill bit (10) to pass through and is coaxially arranged with the push rod (3). At least one locking element (11) is provided on the top of the mounting platform (4) for locking the extension (7) of the limiting strip (6) into the transverse slot (5); Contouring recesses (12) are respectively opened on the bottom surface of the extension (8) of the limiting strip (6) and the top surface of the push rod (3) to fit with the upper and lower surfaces of the valve ball (13) to position the valve ball (13).

2. The valve ball drilling fixture according to claim 1, characterized in that, The driving component (2) is a driving cylinder, and the push rod (3) is the piston rod of the driving cylinder.

3. The valve ball drilling fixture according to claim 1, characterized in that, The locking component (11) is a clamping bolt, and the top of the mounting platform (4) is provided with a threaded hole (14) that is compatible with the clamping bolt.

4. The valve ball drilling fixture according to claim 3, characterized in that, The bottom of the clamping bolt is provided with a clamping part (15), and the extension part (7) of the limiting strip (6) is provided with a positioning slot (16) corresponding to the clamping part (15). The clamping part (15) can be inserted into the positioning slot (16) to position the limiting strip (6).

5. The valve ball drilling fixture according to claim 1, characterized in that, The two contoured recesses (12) are spherical recesses that are adapted to the spherical surface of the valve ball (13).

6. The valve ball drilling fixture according to claim 1, characterized in that, The axes of the two contoured recesses (12) coincide with the axis of the positioning through hole (9).

7. The valve ball drilling fixture according to claim 1, characterized in that, The transverse groove (5) is a T-groove or a dovetail groove, and the extension part (7) of the limiting strip (6) is provided with a guide part (17) that slides with the transverse groove (5).

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