CN108161030B - Sphere processing tool for processing V-shaped semicircular valve ball based on numerical control lathe - Google Patents
Sphere processing tool for processing V-shaped semicircular valve ball based on numerical control lathe Download PDFInfo
- Publication number
- CN108161030B CN108161030B CN201810144245.XA CN201810144245A CN108161030B CN 108161030 B CN108161030 B CN 108161030B CN 201810144245 A CN201810144245 A CN 201810144245A CN 108161030 B CN108161030 B CN 108161030B
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- core rod
- valve ball
- core
- shaped semicircular
- semicircular valve
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- 238000003754 machining Methods 0.000 claims abstract description 25
- 238000005520 cutting process Methods 0.000 abstract description 15
- 238000007789 sealing Methods 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000007514 turning Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000000498 ball milling Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B5/00—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B5/00—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor
- B23B5/06—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor for turning valves or valve bodies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turning (AREA)
- Taps Or Cocks (AREA)
Abstract
The invention belongs to the technical field of turning and relates to a spherical surface machining tool for machining a V-shaped semicircular valve ball based on a numerical control lathe, which comprises a base and a core rod, wherein the base comprises a disc, a fixed block and a core seat which are fixed on the disc, and a movable block coaxial with the fixed block and the core seat is also arranged on the base; the fixing block and the core seat are provided with internal splines, and the middle part and the head part of the core rod are provided with external splines; the middle part of the core rod is inserted into the core seat, and the head part of the core rod is close to the fixed block and sleeved with an opening retainer ring; the movable block is provided with a propping structure for pushing the tail part of the core rod. The cutting time is short; the intermittent cutting area is small, and the service cycle of the cutter is long; manufacturing cost is reduced; the sealing effect of the valve seat and the spherical surface is improved.
Description
Technical Field
The invention belongs to the technical field of turning, relates to a machining tool for machining a V-shaped semicircular valve ball spherical surface, and particularly relates to a spherical surface machining tool for machining a V-shaped semicircular valve ball based on a numerical control lathe.
Background
In recent years, ball valves are diversified, wherein the valve ball in the V-shaped ball valve is of a V-shaped semicircular structure, so that the valve ball can be cut off, and the fluid regulating function can be realized. With the recent development of the technology field, the conventional processing technology has hardly adapted to the requirements of modern manufacturing. The blank state of the V-shaped semicircular valve ball is usually cast, the traditional spherical surface machining mode adopts rough machining and semi-finish machining of a ball lathe, and the clamping mode adopts a mandrel penetrating mode and a jacking mode. And finally, finishing the spherical surface by using a ball milling machine tool, wherein a clamping mode adopts a core rod penetrating double-ejection mode. The above sphere processing method has the following disadvantages:
1. The processing time is long. The cutting length of the cutter is about one half of the circumference during turning by adopting a one-clamping-one-pushing mode;
2. severe tool wear, poor spherical roughness and poor spherical roundness. Because the structure of the ball is semicircular V-shaped, a penetrating rod one-clamping-one-pressing machining mode is adopted, intermittent machining exists in the whole cutting process during machining, intermittent collision is generated between a workpiece and a cutter, and the cutter point is easy to wear.
3. The position degree of the spherical surface (V-shaped center line) is difficult to ensure. The spherical surface position is difficult to find the machined surface to be used as a precise reference, and only the spherical surface of a blank can be used as a reference. Resulting in the need for repair of the driven shaft during assembly of the ball valve.
4. The number of steps is large, and the manufacturing cost is high. The ball mill is used for processing the spherical surface, and the sealing effect between the spherical surface and the valve seat is poor due to the poor surface roughness and the roundness of the spherical surface, so that ball milling procedures are required to be added, and the manufacturing cost of workpieces is increased by the two procedures.
5. The sealing effect of the valve ball and the valve seat is poor. When the valve ball and the valve seat are sealed by metal hard, the processing lines of the sealing surface of the valve seat are inconsistent with the processing lines of the spherical surface of the valve ball, and leakage is easy to occur during sealing. The ball and the seat need to be ground together with the grinding paste.
The traditional spherical surface processing technology not only affects the production period and the cost, but also affects the sealing effect of the ball valve.
Disclosure of Invention
The invention aims to solve the problems, and provides a spherical surface machining tool for machining a V-shaped semicircular valve ball based on a numerical control lathe.
According to the technical scheme, the spherical surface machining tool based on the numerical control lathe for machining the V-shaped semicircular valve ball comprises a base and a core rod, wherein the base comprises a disc, a fixed block and a core seat which are fixed on the disc, and a movable block coaxial with the fixed block and the core seat is further arranged on the base; the fixing block and the core seat are provided with internal splines, and the middle part and the head part of the core rod are provided with external splines; the middle part of the core rod is inserted into the core seat, and the head part of the core rod is close to the fixed block and sleeved with an opening retainer ring; the movable block is provided with a propping structure for pushing the tail part of the core rod.
Further, the heights of the tail part of the core rod, the movable block and the fixed block are lower than the height of the rotation center line of the V-shaped semicircular valve ball.
Furthermore, one end of the head of the core rod, which is close to the core seat, is provided with a step, and the opening retaining ring is sleeved on the step.
Further, a threaded hole is formed in the center of the upper end of the movable block, and the jacking structure is a screw installed in the threaded hole.
Further, a stop block is arranged at the tail part of the core rod.
Further, the split ring is in a ring-shaped U-shaped shape.
Compared with the prior art, the invention has the following advantages: the cutting time is short: the cutter cutting length is about one quarter of the circumference; the intermittent cutting area is small, the arc surface in the sealing range is ensured to have no intermittent cutting, and the service cycle of the cutter is long; the distance between the fixing block and the center of the base is ensured at the position of the (V-shaped center line) of the V-shaped semicircular valve ball spherical surface; the numerical control lathe digital information and the cutter compensation principle are utilized, the rough and finish machining is completed in the same working procedure, the grinding working procedure is reduced, and the manufacturing cost is reduced; the roughness and roundness of the spherical surface are guaranteed, and the cutting lines of the spherical surface are consistent with the lines of the sealing surface of the valve seat, so that the sealing effect of the valve seat and the spherical surface is improved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of a base structure of the present invention.
Fig. 3 is a left side view of fig. 2.
FIG. 4 is a schematic view of the core rod of the present invention.
FIG. 5 is a schematic view of a circlip according to the present invention.
FIG. 6 is an isometric view of a machined valve ball according to the present invention.
Fig. 7 is a schematic view of a V-shaped half ball.
Reference numerals illustrate: 1-base, 11-fixed block, 12-core seat, 13-disc, 2-core rod, 21-dog, 3-movable block, 4-split washer, 5-tight structure, 6-hexagon head bolt, 7-V type semicircle valve ball.
Detailed Description
The invention will be further described with reference to specific examples and figures.
As shown in the figure: the utility model provides a sphere processing frock based on numerical control lathe processing V type semicircle valve ball, includes base 1 and plug 2, and base 1 includes disc 13 and fixed block 11 and core seat 12 on disc 13, still is equipped with on the base 1 with fixed block 11 and the coaxial movable block 3 of core seat 12. The fixed block 11 and the core seat 12 are provided with internal splines, and the middle part and the head part of the core rod 2 are provided with external splines; the middle part of the core rod 2 is inserted into the core seat 12, and the head part of the core rod 2 is close to the fixed block 11 and sleeved with the split ring 4. The movable block 3 is provided with a jacking structure 5 for pushing the tail part of the core rod 2, and specifically, the center of the upper end of the movable block 3 is provided with a threaded hole, and the jacking structure 5 is a screw arranged in the threaded hole. The tail part of the core rod 2 is provided with a stop block 21, so that the pushing of the pushing structure 5 is facilitated. In order to ensure that the spherical cutting of the V-shaped semicircular valve ball 7 is free from interference, the heights of the tail part of the core rod 2, the movable block 3 and the fixed block 11 are lower than the height of the rotation center line of the V-shaped semicircular valve ball 7. The head of the core rod 2 is provided with a step at one end close to the core seat 12, and the split retaining ring 4 is sleeved on the step to avoid the position movement. The split ring 4 is in a ring-shaped U-shaped shape, and is convenient to assemble and disassemble.
The working process comprises the following steps: the invention is used with a numerical control lathe, the model of the lathe is determined by whether a lathe chuck can clamp the tool disc 13, other working procedures of the V-shaped semicircular valve ball 7 are finished, and only the spherical surface is left unprocessed, and the spherical surface is a casting surface. The fixture base 1 is arranged on a chuck of a numerically controlled lathe, the outer circle of the base 1 is corrected by a dial indicator, the center of the chuck is concentric with the outer circle of the base 1, and finally, the clamping jaws are clamped.
The excircle of the base 1 is used as a tool setting point of the X axis of the machine tool. The core rod 2 is inserted into the core seat 12, and the highest point of the outer circle surface of the core rod 2 is used as a Z-axis tool setting point. And setting the coordinates of the valve ball on the tool in the machine tool parameters.
As shown in fig. 6, the spline center of the V-shaped semicircular valve ball 7 is aligned with the center of the internal spline of the fixture fixed block 11 and the core seat 12, then the core rod 2 with the external spline is inserted into the fixture fixed block, and simultaneously, one end surface of the tail of the core rod 2 is parallel to the surface of the disc 1, and when the external spline of the core rod 2 is inserted into the internal spline of the V-shaped semicircular valve ball 7, one end surface of the V-shaped semicircular valve ball 7 close to the opening V is parallel to the surface of the disc 1. The movable block 3 is fixed on the disc 13 by a hexagon head bolt 6, one end of the core rod 2 is inserted into the split washer 4, and finally, a screw hole in the middle of the movable block 3 is provided with a jacking structure 5, namely a screw. The screw is screwed to enable the screw to prop against the tail end face of the core rod 2, the core rod 2 drives the split ring 4, the split ring 4 drives the V-shaped semicircular valve ball 7 to move forwards, and finally the V-shaped semicircular valve ball 7 props against one end face of the fixed block 11 and cannot move. At this time, the V-shaped semicircular valve ball 7 is completely positioned in the tool, and six degrees of freedom cannot be moved.
Because the machining is the workpiece rotation machining, the cutting force is diffused to the periphery, and the force transmitted by the inner screw is enough to ensure that the V-shaped semicircular valve ball 7 does not vibrate and loose during cutting. The spherical surface can be processed by editing a quarter-circle program, wherein intermittent cutting exists only for a distance of the V-shaped opening, and the fact that intermittent cutting does not exist in the sealing range of the spherical surface is ensured. The numerical control system can be used for editing rough machining and finish machining programs, and the spherical roughness and the spherical roundness are ensured. The spherical cutting lines are consistent with the line direction of the sealing surface of the valve seat, so that the sealing effect of the valve ball and the valve seat is improved. After the processing is finished, all screws on the movable block 3 are loosened, the split ring 4 and the core rod 2 are taken out, and finally a processed valve ball is obtained.
The invention uses the core rod to connect the valve ball and the core seat together. When the core rod receives thrust, the core rod drives the split retainer ring to push the V-shaped semicircular valve ball, the end face of the V-shaped semicircular valve ball shaft hole is close to the positioning face of the fastening block and cannot move, and finally the valve ball is completely fixed on a tool. The numerical control machine tool is combined with the tool to process the spherical surface, so that the production efficiency is improved, the quality is guaranteed, and meanwhile, the processed spherical surface and the valve seat have better sealing effect.
Claims (2)
1. The spherical surface machining tool based on the numerical control lathe for machining the V-shaped semicircular valve ball is characterized by comprising a base (1) and a core rod (2), wherein the base (1) comprises a disc (13), a fixed block (11) and a core seat (12) which are fixed on the disc (13), and a movable block (3) which is coaxial with the fixed block (11) and the core seat (12) is also arranged on the base (1); the fixing block (11) and the core seat (12) are provided with internal splines, and the middle part and the head part of the core rod (2) are provided with external splines; the middle part of the core rod (2) is inserted into the core seat (12), and the head part of the core rod (2) is close to the fixed block (11) and sleeved with the split washer (4); a jacking structure (5) for pushing the tail part of the core rod (2) is arranged on the movable block (3);
the heights of the tail part of the core rod (2), the movable block (3) and the fixed block (11) are lower than the height of the rotation center line of the V-shaped semicircular valve ball (7);
a step is arranged at one end of the head of the core rod (2) close to the core seat (12), and an opening retainer ring (4) is sleeved on the step;
The center of the upper end of the movable block (3) is provided with a threaded hole, and the jacking structure (5) is a screw arranged in the threaded hole;
a stop block (21) is arranged at the tail part of the core rod (2);
The V-shaped semicircular valve ball (7) is provided with an internal spline matched with the external spline of the core rod (2); when the external spline of the core rod (2) is inserted into the internal spline of the V-shaped semicircular valve ball (7), the end surface of the V-shaped semicircular valve ball (7) close to the V-shaped opening is ensured to be parallel to the disc (13);
The movable block (3) is fixed on the disc (13) through the hexagon head bolt (6), one end of the core rod (2) is inserted into the split washer (4), finally, a screw is arranged in a threaded hole in the middle of the movable block (3), the screw is screwed down to enable the screw to prop against the tail end face of the core rod (2), the core rod (2) drives the split washer (4), the split washer (4) drives the V-shaped semicircular valve ball (7) to move forwards, and finally, the V-shaped semicircular valve ball (7) can not move against one end face of the fixed block (11).
2. The spherical surface machining tool for machining the V-shaped semicircular valve ball based on the numerical control lathe according to claim 1, wherein the split retaining ring (4) is in an annular U shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810144245.XA CN108161030B (en) | 2018-02-12 | 2018-02-12 | Sphere processing tool for processing V-shaped semicircular valve ball based on numerical control lathe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810144245.XA CN108161030B (en) | 2018-02-12 | 2018-02-12 | Sphere processing tool for processing V-shaped semicircular valve ball based on numerical control lathe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108161030A CN108161030A (en) | 2018-06-15 |
| CN108161030B true CN108161030B (en) | 2024-05-10 |
Family
ID=62512431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810144245.XA Active CN108161030B (en) | 2018-02-12 | 2018-02-12 | Sphere processing tool for processing V-shaped semicircular valve ball based on numerical control lathe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108161030B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191513284A (en) * | 1915-09-17 | 1916-08-31 | William Lawes Cole | Improvements in Lathes, particularly adapted for Producing Shells and the like. |
| US4617845A (en) * | 1983-03-29 | 1986-10-21 | Mitsubishi Jukogio Kabushiki Kaisha | Method and apparatus for working peripheral wall of hemispherical shell |
| CN201880940U (en) * | 2010-03-31 | 2011-06-29 | 长春设备工艺研究所 | Device used for quickly replacing machine bit and other taper-shank tools |
| KR20140108859A (en) * | 2013-03-04 | 2014-09-15 | 김향수 | Grinding device for ball valves ball epicenter |
| CN105234721A (en) * | 2015-10-22 | 2016-01-13 | 重庆颖泉标准件有限公司 | Locating device for machining of spherical end of gear shift oscillating bar on automobile transmission |
| CN206029348U (en) * | 2016-08-24 | 2017-03-22 | 十堰高明精密机械有限公司 | Auto steering ware casing processing four -axis frock |
| CN206405790U (en) * | 2016-10-14 | 2017-08-15 | 宁夏天地奔牛实业集团有限公司 | Sliding wheel-class parts V-groove processing and loading clamp positioner |
| CN107570973A (en) * | 2017-09-28 | 2018-01-12 | 中国航发动力股份有限公司 | One kind is used for clamshell type ball bearing processing unit (plant) and its processing method |
| CN206925207U (en) * | 2017-06-30 | 2018-01-26 | 隆昌山川精密焊管有限责任公司 | A kind of hole punching positioning device for opening steel pipe |
| CN208033667U (en) * | 2018-02-12 | 2018-11-02 | 无锡智能自控工程股份有限公司 | A kind of spherical surface processing tool based on lathe in machining V-type semicircle valve ball |
-
2018
- 2018-02-12 CN CN201810144245.XA patent/CN108161030B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191513284A (en) * | 1915-09-17 | 1916-08-31 | William Lawes Cole | Improvements in Lathes, particularly adapted for Producing Shells and the like. |
| US4617845A (en) * | 1983-03-29 | 1986-10-21 | Mitsubishi Jukogio Kabushiki Kaisha | Method and apparatus for working peripheral wall of hemispherical shell |
| CN201880940U (en) * | 2010-03-31 | 2011-06-29 | 长春设备工艺研究所 | Device used for quickly replacing machine bit and other taper-shank tools |
| KR20140108859A (en) * | 2013-03-04 | 2014-09-15 | 김향수 | Grinding device for ball valves ball epicenter |
| CN105234721A (en) * | 2015-10-22 | 2016-01-13 | 重庆颖泉标准件有限公司 | Locating device for machining of spherical end of gear shift oscillating bar on automobile transmission |
| CN206029348U (en) * | 2016-08-24 | 2017-03-22 | 十堰高明精密机械有限公司 | Auto steering ware casing processing four -axis frock |
| CN206405790U (en) * | 2016-10-14 | 2017-08-15 | 宁夏天地奔牛实业集团有限公司 | Sliding wheel-class parts V-groove processing and loading clamp positioner |
| CN206925207U (en) * | 2017-06-30 | 2018-01-26 | 隆昌山川精密焊管有限责任公司 | A kind of hole punching positioning device for opening steel pipe |
| CN107570973A (en) * | 2017-09-28 | 2018-01-12 | 中国航发动力股份有限公司 | One kind is used for clamshell type ball bearing processing unit (plant) and its processing method |
| CN208033667U (en) * | 2018-02-12 | 2018-11-02 | 无锡智能自控工程股份有限公司 | A kind of spherical surface processing tool based on lathe in machining V-type semicircle valve ball |
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| Publication number | Publication date |
|---|---|
| CN108161030A (en) | 2018-06-15 |
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