CN117358955A - High-precision lathe for machining conical surface of valve core - Google Patents
High-precision lathe for machining conical surface of valve core Download PDFInfo
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- CN117358955A CN117358955A CN202311437660.1A CN202311437660A CN117358955A CN 117358955 A CN117358955 A CN 117358955A CN 202311437660 A CN202311437660 A CN 202311437660A CN 117358955 A CN117358955 A CN 117358955A
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- 238000003754 machining Methods 0.000 title claims abstract description 33
- 238000005520 cutting process Methods 0.000 claims abstract description 170
- 239000002994 raw material Substances 0.000 claims abstract description 36
- 238000003825 pressing Methods 0.000 claims description 43
- 230000000087 stabilizing effect Effects 0.000 claims description 22
- 230000007246 mechanism Effects 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 239000011162 core material Substances 0.000 description 52
- 238000013459 approach Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
The invention discloses a high-precision lathe for machining a conical surface of a valve core, which comprises the following steps: a clamping assembly; the feeding assembly, it includes the cutter seat that removes the feeding, has the cutter group on the cutter seat clamping, wherein: the cutter set comprises a conical surface turning tool and a cutting-off tool, a conical surface blade is arranged on the conical surface turning tool, the cutting-off tool penetrates through the conical surface turning tool and is arranged on the cutter seat, and the cutting-off blade on the cutting-off tool is aligned with the tail end of the conical surface blade. According to the high-precision lathe for machining the valve core conical surface, when the conical surface turning tool and the cutting tool are clamped, only the upper end part of the cutting tool is required to be subjected to tool setting with valve core raw materials, and the conical surface turning tool is fixed with the cutting tool, so that secondary tool setting is not required, position errors caused by repeated tool setting are avoided, machining precision of the lathe is improved, the conical surface of the valve core is machined through the conical surface blade of the conical surface turning tool, and transverse and longitudinal matching errors possibly caused by oblique movement of the cutting edge of the traditional turning tool can be avoided.
Description
Technical Field
The invention relates to the technical field of high-precision lathes, in particular to a high-precision lathe for machining a conical surface of a valve core.
Background
The high-speed precision machine tool is used for various rotary turning processes, such as turning inner and outer cylindrical surfaces, end surfaces, conical surfaces and other rotary surfaces; metric, english, modulus and diameter section threads are processed; drilling, reaming, oil groove pulling and the like.
According to publication number CN105757274a, publication date: 2016.07.13, a conical surface valve is disclosed, and the technical scheme is: the valve comprises a fixed nut, a handle and a valve body with an inlet and an outlet, wherein the valve rod end of a valve rod with a valve core is connected with the fixed nut and the handle, the valve core end of a conical surface of the valve rod with the valve core is connected with the inlet and the outlet in the valve body, and a valve core fluid hole is formed in the valve core end of the conical surface; the valve rod with the valve core is a component which is formed by integrating the valve rod end and the conical surface valve core end. The invention has the beneficial effects that: the invention adopts a conical design between the valve core end and the valve body, and the conical valve core end can enhance the sealing performance of the valve core end and the valve body by utilizing fluid pressure, so the valve has the function of automatically preventing leakage, is durable in use, has the filtering function, and is not easy to damage.
In the prior art including above-mentioned patent, the conical surface case end of the case on the valve rod links to each other with the import and the export in the valve body, consequently the conical surface form precision of case can directly influence the leakproofness of valve body, and current case conical surface processing is processed through high-speed precision machine tool, install the lathe tool on the lathe promptly, the centre gripping is fixed on the main shaft is installed to the case raw materials, the case raw materials is rotatory through the main shaft, and the lathe tool removes and feeds and carry out the turning shaping of conical surface on the case raw materials, still need change the cutting off knife in order to excision the unnecessary section of case afterwards, and the turning and the cutting off of the conical surface of case divide into two steps, adopt two knives to process, consequently need carry out twice manual tool setting in the course of working of case conical surface, the problem of position error can appear in the increase of tool setting number inevitably, and then reduce the machining precision of conical surface.
Disclosure of Invention
The invention aims to provide a high-precision lathe for machining a valve core conical surface, which is used for solving the problem that multiple tool setting is needed in the machining process of the valve core conical surface, so that the machining precision of the conical surface is reduced.
In order to achieve the above object, the present invention provides the following technical solutions: a high-precision lathe for machining a valve core conical surface comprises:
the clamping assembly is used for clamping the valve core raw material and driven to vertically and axially rotate;
the feeding assembly, it includes the cutter seat that removes the feeding, the clamping has cutter group on the cutter seat, wherein:
the cutter set comprises a conical surface turning tool and a cutting-off cutter, wherein a conical surface blade is arranged on the conical surface turning tool, the cutting-off cutter penetrates through the conical surface turning tool and is arranged on a cutter seat, and the cutting-off blade on the cutting-off cutter is aligned with the tail end of the conical surface blade.
Preferably, the feeding assembly further comprises a vertical movable seat and a horizontal movable seat, wherein the horizontal movable seat keeps longitudinal horizontal movement, and the cutter seat is horizontally and movably arranged on the horizontal movable seat so as to enable the cutter group on the cutter seat to be aligned relative to the axis of the valve core raw material.
Preferably, the cutter comprises a cutter seat, a cutter body and a driving assembly, wherein the cutter body is provided with a conical surface edge, the conical surface edge is provided with a conical surface, and the cutter body is provided with a plurality of cutting edges.
Preferably, the cutting knife further comprises a locking assembly, wherein the locking assembly comprises a fixed seat and an extending rod movably arranged on the fixed seat, the extending rod is provided with a locking block, and the extending rod is used for enabling the locking block to lock the cutting knife.
Preferably, the device further comprises a stabilizing assembly comprising a sliding block, a first elastic member and a stabilizing block arranged in the horizontal movable seat, wherein:
under the default state of the first elastic piece, the stabilizing block always abuts against one end of the cutting knife back to the cutting edge, and the abutting direction is consistent with the turning compression direction of the cutting edge.
Preferably, the device further comprises an adjusting mechanism, which comprises a pushing rod arranged on the cutter seat and axially sliding relative to the sliding block, wherein the cutter seat is positioned on two opposite side surfaces of the horizontal movable seat for sliding, and the adjusting mechanism comprises:
the first side surface moves down so that the abutting rod abuts against the sliding block to compress the first elastic piece;
the second side moves, and the cutting knife slides to compress the first elastic piece relative to the sliding block.
Preferably, the device further comprises an air pipe which is communicated with the inside of the fixed seat, the extending rod is communicated with the inside of the fixed seat, the locking block is movably arranged on the movable hole of the extending rod, the two ends of the cutting knife are stressed simultaneously, so that the locking block is pressed to movably open the movable hole, and after the air in the air pipe is filled into the locking groove along the movable hole, the air flows to the cutting edge along the outflow groove.
Preferably, the locking assembly further comprises a pressing plate and a second elastic piece, the pressing plate is axially arranged on the extending rod in a sliding mode, and the extending rod extends out to enable the pressing plate to be pressed on one side, opposite to the outflow groove, of the locking groove under the driving of the second elastic piece.
Preferably, the cooperation of the extending rod and the pressing plate at least comprises a rotary extending stroke, and the pressing plate pushes the sliding block to compress the first elastic piece in the rotary extending stroke process, and then the first elastic piece is separated from the sliding block and is pressed on the cutting blade.
Preferably, the adjusting assembly further comprises a worm wheel and a worm which are rotatably arranged on the cutter seat and are mutually coupled, the worm wheel is in threaded fit with the pushing rod, and the worm is provided with a gear part which is coupled with the tooth part on the horizontal movable seat.
In the technical scheme, the high-precision lathe for machining the conical surface of the valve core has the following beneficial effects: when the clamping of the conical surface turning tool and the cutting tool is completed, the upper end part of the cutting tool is only required to be subjected to tool setting with the valve core raw material, and the conical surface turning tool is fixed with the cutting tool, so that secondary tool setting is not required, further, position errors caused by repeated tool setting are avoided, the machining precision of the conical surface of the valve core is improved, the machining precision of a machine tool is improved, the conical surface edge of the conical surface turning tool is used for machining the conical surface of the valve core, firstly, transverse and longitudinal matching errors possibly occurring when the cutting edge of the traditional turning tool moves obliquely to the turning cutting edge can be avoided, secondly, the planar cutting edge is used for turning instead of the driven punctiform cutting edge, the strength of the cutting edge is increased, and the turning damage of the valve core raw material caused by breakage of the cutting edge is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
FIG. 1 is a schematic view of the overall structure provided by an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a vertical movable seat and a cutter seat according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a vertical movable seat and a cutter seat according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a tool holder, a stabilizing mechanism and an adjusting mechanism according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a locking mechanism, a stabilizing mechanism, an adjusting mechanism and a cutting knife according to an embodiment of the present invention;
fig. 6 is an exploded mechanism schematic view of a locking mechanism according to an embodiment of the present invention;
FIG. 7 is a schematic view of a portion of the present invention at A;
FIG. 8 is a schematic view of a portion at B according to an embodiment of the present invention;
FIG. 9 is a schematic view of a portion of the embodiment of the present invention at C;
fig. 10 is a schematic diagram of a raw material after processing according to an embodiment of the present invention.
Reference numerals illustrate:
1. a base frame; 11. a blanking seat; 2. a clamping assembly; 3. a feed assembly; 31. a vertical movable seat; 32. a horizontal movable seat; 321. a tooth portion; 33. a cutter seat; 34. an adjusting rod; 341. a grip portion; 35. the pushing block; 36. a telescopic cylinder; 4. a cutter set; 41. conical turning tool; 411. a conical surface blade; 42. a cutting knife; 421. a cutting edge; 422. a locking groove; 423. entering a groove; 424. an outflow groove; 51. a fixing seat; 511. a vertical sliding groove; 512. a rotary groove; 52. an extension rod; 521. a movable hole; 522. a movable part; 523. a mounting part; 53. an air pipe; 54. a locking block; 55. a compacting plate; 56. a second elastic member; 61. a sliding block; 611. a limit groove; 612. a contact portion; 613. slide out of the groove; 62. a first elastic member; 63. a stabilizing block; 71. a push rod; 711. a chute; 72. a worm wheel; 73. a worm; 731. a gear portion; 8. a flexible contact layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. It will be apparent that the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments, which can be made by one of ordinary skill in the art without the need for inventive faculty, are within the scope of the present disclosure, based on the described embodiments of the present disclosure.
As shown in fig. 1 to 10, a high-precision lathe for machining a conical surface of a valve element comprises:
the clamping assembly 2 is used for clamping the valve core raw material and driven to vertically and axially rotate;
the feeding assembly 3 comprises a cutter seat 33 for moving and feeding, wherein a cutter group 4 is clamped on the cutter seat 33, and the feeding assembly comprises the following components:
the cutter set 4 includes a taper-face cutter 41 and a cutter 42, the taper-face cutter 41 is provided with a taper-face blade 411, the cutter 42 penetrates the taper-face cutter 41 and is mounted on the cutter holder 33, and the cutter 421 on the cutter 42 is aligned with the tip of the taper-face blade 411.
Specifically, the valve core cutting machine further comprises a base frame 1, the clamping assembly 2 is arranged on the base frame 1, when the valve core raw material is clamped on the clamping assembly 2, the axis is vertical, the blanking seat 11 on the base frame 1 is positioned below the clamping assembly 2, when cutting is required, the base frame 1 is provided with a driving device to drive the clamping assembly 2 to rotate, the feeding assembly 3 is used for driving the cutter group 4 on the cutter seat 33 to move relative to the valve core raw material for turning, generally, the valve core is usually processed by adopting a stepped shaft raw material to reduce the required turning amount and improve the processing efficiency; the driving device on the base frame 1 for driving the clamping assembly 2 to rotate is a common knowledge of a person skilled in the art, and is not described herein.
The cutter set 4 is divided into a conical turning tool 41 and a cutting tool 42, which are clamped on the cutter set 4, wherein a conical blade 411 on the conical turning tool 41 is consistent with the inclination of the conical surface of the valve core, when clamping is carried out, the conical turning tool 41 is firstly installed and fixed on the cutter seat 33, then the cutting tool 42 extends into the cutter seat 33 through a through groove formed on the conical turning tool 41, and then the cutting tool 42 is clamped;
when the clamping of the conical surface turning tool 41 and the cutting tool 42 is completed, and as shown in fig. 2, the cutting edge 421 of the cutting tool 42 extends out of the conical surface edge 411 of the conical surface turning tool 41, and the upper end part of the cutting tool 42 is aligned with the lower end of the conical surface edge 411, so that when the tool is set, only the upper end part of the cutting tool 42 is required to be set with the valve core raw material, and the conical surface turning tool 41 is fixed with the cutting tool 42, so that secondary tool setting is not required, further position errors caused by repeated tool setting are avoided, the machining precision of the conical surface of the valve core is improved, and the machining precision of the machine tool is improved; when turning is performed after the tool setting is completed, as shown in fig. 1, the cutter seat 33 is driven to move so as to drive the cutting edge 421 to be close to the valve core raw material and gradually turn the redundant section of the valve core raw material, the conical surface edge 411 of the conical surface turning tool 41 is gradually close to the valve core raw material so as to turn the conical surface on the raw material, and the conical surface of the valve core is machined through the conical surface edge 411 of the conical surface turning tool 41. And because the conical surface turning tool 41 and the cutting tool 42 synchronously process, the cutting and conical surface turning operations are simultaneously performed, thereby reducing the processing time and improving the processing efficiency.
Moreover, due to the adoption of the vertical clamping valve core raw material, when turning is carried out, waste directly falls on the blanking seat 11 due to gravity, so that the processing and discharging are facilitated, the actual use is facilitated, and the vertical clamping valve core raw material can also facilitate the spraying and cooling of cooling liquid.
Further, the tool holder 33 may be clamped with a mounting bolt to clamp the conical lathe tool 41, and may be clamped with a vice type movable block to clamp the conical lathe tool 41, or may be directly screwed with the tool holder 33 and the conical lathe tool 41 by a bolt to complete the clamping, or may be replaced by other structures known to those skilled in the art that can clamp the conical lathe tool 41 on the tool holder 33.
In the above technical scheme, when the clamping of the conical surface turning tool 41 and the cutting tool 42 is completed, only the upper end part of the cutting tool 42 is required to be subjected to tool setting with the valve core raw material, and the conical surface turning tool 41 is fixed with the cutting tool 42, so that secondary tool setting is not required, further, position errors caused by repeated tool setting are avoided, the machining precision of the conical surface of the valve core is improved, the machining precision of the machine tool is improved, the conical surface of the valve core is machined through the conical surface blade 411 of the conical surface turning tool 41, firstly, horizontal and longitudinal matching errors possibly occurring when the cutting edge of the traditional turning tool moves obliquely can be avoided, secondly, the planar cutting edge is adopted to replace the driven punctiform cutting edge for turning, the strength of the cutting edge is increased, and the valve core raw material turning damage caused by cutting edge breakage is avoided.
As a further embodiment provided by the present invention, the feed assembly 3 further comprises a vertically movable seat 31 and a horizontally movable seat 32, the horizontally movable seat 32 being maintained longitudinally horizontally movable, and the cutter seat 33 being horizontally movable laterally disposed on the horizontally movable seat 32 to move the cutter set 4 thereon into alignment with respect to the spool material axis.
Specifically, as shown in fig. 1, the base frame 1 is vertically slidably disposed on the vertical movable seat 31, the horizontal movable seat 32 is longitudinally and horizontally slidably disposed on the vertical movable seat 31, the tool seat 33 is horizontally and horizontally disposed on the horizontal movable seat 32, the movement of Z, X, Y axis of the tool set 4 is realized by the respective movements of the vertical movable seat 31, the horizontal movable seat 32 and the tool seat 33, and when the tool seat 33 horizontally moves to realize the Y axis movement of the tool set 4, the conical surface edge 411 of the conical surface turning tool 41 and the cutting edge 421 of the cutting tool 42 can synchronously move along the Y axis, so that the conical surface edge 411 and the cutting edge 421 can be moved to be aligned with the axis movement of the valve core raw material fixed on the clamping assembly 2, the axis alignment of the tool set 4 and the valve core raw material can be realized, the turning stability can be increased, and then the tool set 4 can be more conveniently adjusted to be aligned with the valve core raw material by changing the position mode of the tool set 4 by adopting the movement of the tool seat 33 to align with the valve core raw material, thereby facilitating the actual operation and improving the processing efficiency of the workpiece.
The movements of the vertical movable seat 31, the horizontal movable seat 32 and the tool seat 33 can be driven by a motor and a threaded screw rod, or can be driven by a telescopic rod, or can be driven by a motor matched with a gear set and a rack, or can be replaced by other structures known to those skilled in the art, which can drive the movements of the vertical movable seat 31, the horizontal movable seat 32 and the tool seat 33 to move.
Further, as shown in fig. 3, an adjusting rod 34 is rotatably arranged on the horizontal movable seat 32, the adjusting rod 34 penetrates through the cutter seat 33 and is in threaded fit with the cutter seat 33, a holding part 341 is arranged on the adjusting rod 34, the holding part 341 is used for rotating the adjusting rod 34, and then the cutter seat 33 is driven to drive the cutter set 4 to carry out Y-axis moving feeding together, further manual adjustment alignment of the cutter set 4 and the valve core raw material is completed, practical use is facilitated, repeated clamping in a gasket mode is not needed, so that axial alignment of the cutter set 4 and the valve core raw material is realized, and clamping efficiency of the cutter set 4 is improved.
As still another embodiment of the present invention, the present invention further includes a driving unit, in which the cutter 42 is slidably disposed on the cutter holder 33, and the driving unit horizontally moves the cutter 421 with respect to the conical surface 411, and a scale surface is disposed on a side surface of the cutter 42.
Specifically, as shown in fig. 3, the penetrating conical turning tool 41 of the cutting tool 42 is slidably disposed on the tool seat 33, the driving assembly is disposed in the horizontal movable seat 32, a scale surface is disposed on a side surface of the cutting tool 42, not shown in the drawing, when the cutting tool 42 is clamped, the scale surface extends to the outer side of the conical turning tool 41, and the driving assembly can push the cutting tool 42 to slide so as to enable the cutting edge 421 to horizontally move relative to the conical edge 411, when the cutting tool is clamped manually, the cutting edge 421 of the cutting tool 42 is moved horizontally relative to the conical edge 411 as close as possible, then the cutting edge 421 can be extended to adjust the cutting depth of the cutting tool 42 on the valve core raw material, specifically, the specific extending distance of the cutting tool 42 can be defined by carving the extending scale of the scale surface on the cutting tool 42, so that difficulty in self-breaking or difficult cutting of the raw material due to the excessive or too small extending length of the cutting tool 42 is avoided, furthermore, when the cutting tool 42 is clamped integrally due to turning, the cutting tool 42 can be retracted by the scale line after the cutting tool is clamped again, the scale surface 411 is moved as far as close to the conical edge 411, and then the extending length can be adjusted as far as possible, the extending distance of the cutting tool 42 can be adjusted, and the required for the extending distance can be worn.
Further, the driving component may be a pushing block 35 and a telescopic cylinder 36 which are slidably disposed, and the telescopic cylinder 36 may drive the pushing block 35 to slide relative to the cutter seat 33 to push the cutter 42, so as to realize horizontal movement of the cutter 42 and the conical blade 411, or drive the cutter 42 to slide through an electric telescopic rod, or drive the cutter 42 to slide through a motor and a rack and pinion, or other driving components which are known to those skilled in the art and can drive the cutter 42 to slide may be used.
As still another embodiment of the present invention, a locking assembly is further provided, which includes a fixed seat 51 and a protruding rod 52 movably disposed thereon, the protruding rod 52 being provided with a locking block 54, the protruding rod 52 being used to lock the locking block 54 to the cutter 42.
Specifically, the extending rod 52 of the locking assembly is movably disposed on the fixing seat 51, the extending rod 52 is provided with a locking block 54, and the cutting tool 42 is provided with a locking groove 422, so that the extending rod 52 can extend out movably relative to the fixing seat 51 to enable the locking block 54 to abut against the locking groove 422 so as to lock the cutting tool 42, thereby ensuring the stability of the cutting tool 42 during turning cutting operation and ensuring the turning precision of the cutting tool 42.
Further, the flexible contact layer 8 is further fixedly arranged in the locking groove 422, the locking block 54 is embedded into the flexible contact layer 8 and abuts against the locking groove 422 to lock and fix the cutting knife 42, the effect of vibration generated when the cutting knife 42 is turned can be weakened due to the existence of the flexible contact layer 8, shake of the cutting knife 42 is reduced, vibration breakage during operation is avoided, vibration transmitted to the locking component by the cutting knife 42 is buffered, and locking stability of the locked component is further guaranteed.
The extending rod 52 of the locking assembly can be driven by the electric push rod to axially slide and stretch on the fixed seat 51, or can be driven by a driving motor and a gear rack to realize radial movable extension and retraction of the extending rod 52, or can be replaced by other structures known to those skilled in the art for driving the extending rod 52 to extend movably.
As a further embodiment of the present invention, there is also provided a stabilizing assembly comprising a sliding block 61, a first elastic member 62 and a stabilizing block 63 disposed within the horizontal movable base 32, wherein:
under the default state of the first elastic member 62, the stabilizing block 63 always abuts against one end of the cutting blade 42 facing away from the cutting blade 421, and the abutting direction is consistent with the turning pressed direction of the cutting blade 421.
Specifically, the sliding block 61 is slidably disposed in the horizontal movable seat 32, as shown in fig. 3, the sliding block 61 is located at a side biased toward the cutting edge 421 when the clamping of the cutting blade 42 is completed, a stabilizing block 63 slidably disposed is connected to the sliding block 61 through a first elastic member 62, and an entry slot 423 is formed in the cutting blade 42, when the cutting blade 42 penetrates through the conical turning tool 41 and is clamped on the tool seat 33, an end of the cutting blade 42 facing away from the cutting edge 421 extends into the horizontal movable seat 32, at this time, the stabilizing block 63 slides through the entry slot 423 to abut against an end of the cutting blade 42 facing away from the cutting edge 421, at this time, the first elastic member 62 is located in a default state and is in a compressed state, and the first elastic member 62 drives the stabilizing block 63 to compress against an end of the cutting blade 42 facing away from the cutting edge 421;
since the cutting edge 421 of the cutting blade 42 rubs against the valve core material to perform actual turning, as shown in fig. 3, the cutting edge 421 at the left end of the cutting blade 42 receives upward turning pressure, and the first elastic member 62 applies upward pressure to the right end of the cutting blade 42 through the stabilizing block 63 to promote the pressure received by both ends of the cutting blade 42 to approach balance, thereby avoiding the problem that the cutting blade 42 is pressed askew and breaks due to the single side pressing of the cutting edge 421, ensuring the use safety of the cutting blade 42, and the elastic pressing of the cutting blade 42 by the first elastic member 62 also has the effect of buffering the vibration generated on the cutting blade 42, and further avoiding the break or the decrease of the machining precision of the cutting blade 42 due to the turning vibration;
further, in the turning process, since the cutting edge 421 at the left end of the cutting tool 42 is upwards under the turning pressure, the right end of the cutting tool 42 is upwards under the pushing pressure of the first elastic member 62 and the stabilizing block 63, the cutting tool 42 is tightly attached to the conical surface turning tool 41 under the action of the pressure at the two ends, the cutting tool 42 is responsible for the cutting operation with large turning depth, the conical surface turning tool 41 performs the surface turning with small turning depth, and different vibrations are generated between the conical surface turning tool 41 and the cutting tool 42 due to different turning depths, so that the vibrations generated by the conical surface turning tool 41 and the cutting tool 42 can be mutually interfered by each other, further, the damping effect on the conical surface turning tool 41 and the cutting tool 42 is achieved, the self resonance of the cutting tool is avoided, and the use safety and the fixing stability of the cutting tool are further improved.
As a further embodiment of the present invention, the present invention further comprises an adjusting mechanism, which includes a pushing rod 71 disposed on the tool holder 33 and axially sliding relative to the sliding block 61, and the tool holder 33 slides on two opposite sides of the horizontal movable holder 32, wherein:
the first side moves down to enable the pushing rod 71 to push the sliding block 61 to compress the first elastic piece 62;
the second side moves, and the cutoff blade 42 slides against the slide block 61 to compress the first elastic member 62.
Specifically, the pushing rod 71 is provided with a sliding groove 711 to be axially slidably disposed on the tool holder 33, as shown in fig. 5, a limiting groove 611 is formed on the sliding block 61, the sliding block 61 passes through the limiting groove 611 to be located on the horizontal movable holder 32 and has a limiting point, and the sliding block 61 is located at one side of the cutting edge 421, as shown in fig. 3, the sliding block 61 is located at the limiting point to make the sliding block 61 not be able to slide away from the cutting edge 42, and the tool holder 33 is located in the middle of the horizontal movable holder 32 in the initial state, when the tool holder 33 needs to be driven to perform Y-axis movement feeding, the tool holder 33 is driven to slide on both sides of the horizontal movable holder 32, so that the overall center of gravity of the tool holder 33 and the horizontal movable holder 32 is shifted, and the cutting pressure applied to the cutting edge 421 on the tool holder 33 is increased, thereby:
when the cutter holder 33 is driven to move to the lower side of the horizontal movable holder 32 for Y-axis moving feeding as shown in fig. 3, that is, the cutter holder 33 moves to the second side of the horizontal movable holder 32, the cutter holder 33 drives the cutter 42 to move synchronously, and the cutter 42 moves along with the movement and gradually approaches the sliding block 61, and the sliding block 61 is located at the limiting point and can not slide away from the cutter 42, so that the first elastic member 62 is gradually compressed by the stabilizing block 63 and the sliding block 61, and the pressure of the first elastic member 62 on the right end of the cutter 42 is gradually increased, so that when the cutter holder 33 moves horizontally to the peripheral side of the horizontal movable holder 32, the pressure on the right end of the cutter 42 is increased to adaptively match the increased pressure on the left end of the cutter 42 during turning cutting. Further avoiding breakage of the cutter 42 during operation, and increasing the fixation stability and machining precision of the cutter 42;
when the cutter holder 33 is driven to move to the upper side of the horizontal movable holder 32 for Y-axis moving feeding as shown in fig. 3, that is, the cutter holder 33 moves to the first side of the horizontal movable holder 32, the cutter holder 33 drives the cutting blade 42 to move upwards, and the pushing rod 71 is driven to slide relative to the sliding block 61 to push the sliding block 61 to slide close to the cutting blade 42, so that the sliding block 61 slides to compress the first elastic member 62 to increase the pressure of the right end of the cutting blade 42, and further, when the cutter holder 33 moves horizontally to the peripheral side of the horizontal movable holder 32, the pressure of the right end of the cutting blade 42 is increased to adaptively match the increased pressure of the left end of the cutting blade 42 during turning cutting. Further, breakage of the cutter 42 during operation is avoided, and the stability and machining accuracy of the cutter 42 are increased.
In summary, when the tool holder 33 moves in the Y-axis to align the tool set 4 with the axis of the valve core raw material, the presence of the adjusting lever 34, the sliding block 61, the first elastic member 62, and the stabilizing block 63 can apply adaptively increased pressure to the right end of the cutter 42 to match the increased pressure to which the left end of the cutter 42 is subjected during turning cutting, avoiding the problem of chipping due to the increase in turning pressure to which the cutter 42 is subjected caused by the change in the center of gravity generated when the tool holder 33 moves.
The pushing rod 71 may be driven by an electric telescopic rod to axially move, or driven by a motor in combination with a gear set and a rack to axially move, or replaced by other driving modes known to those skilled in the art that can drive the pushing rod 71 to axially slide.
Further, as shown in fig. 4, the tool holder 33 is rotatably provided with a worm wheel 72 and a worm 73, the worm wheel 72 is in threaded engagement with the push rod 71, the worm 73 is provided with a gear 731 coupled with the gear 321 of the horizontal movable holder 32, wherein the peripheral side of the push rod 71 is provided with threads, and the worm wheel 72 is coaxially provided with the push rod 71 and in threaded engagement therewith, wherein:
as shown in fig. 3, when the cutter holder 33 is located at the initial position and slides downwards relative to the horizontal movable holder 32 to perform Y-axis moving feeding, at this time, the tooth 321 is meshed with the following gear 731 to drive the worm 73 to rotate forward, the worm 73 drives the worm wheel 72 to rotate so as to enable the push rod 71 to move axially away from the sliding block 61, so that the push rod 71 is prevented from contacting the sliding block 61 and the first elastic member 62 is prevented from applying stable pressure to the right end of the cutter 42;
as shown in fig. 3, when the cutter holder 33 is located at the initial position and slides upward relative to the horizontal movable holder 32 for Y-axis moving feeding, the tooth 321 drives the worm 73 to rotate reversely due to engagement of the following gear 731, the worm 73 drives the worm wheel 72 to rotate so that the push rod 71 approaches the slide block 61 for axial moving approaching, and the push rod 71 moves to push the slide block 61 away from the limiting point, and the slide block 61 compresses the first elastic member 62 to increase the pressure of moving the first elastic member 62 to the right side of the cutter 42.
The mode of the worm wheel 72 and the worm 73 is adopted to drive the pushing rod 71 to axially move, so that the pushing rod 71 has a self-locking effect, the sliding of the sliding block 61 caused by the movement of the pushing rod 71 is prevented from interfering with the pressure change on the cutter 42, and the pressure stability of the right end of the cutter 42 is improved.
As still another embodiment of the present invention, the present invention further includes an air pipe 53 which is communicated with the inside of the fixed seat 51, the extended rod 52 is communicated with the inside of the fixed seat 51, the locking block 54 is movably disposed on the movable hole 521 of the extended rod 52, and the two ends of the cutting blade 42 are simultaneously stressed so that the locking block 54 is pressed to movably open the movable hole 521, so that the air in the air pipe 53 flows along the outflow slot 424 to the cutting blade 421 after being filled into the locking slot 422 along the movable hole 521.
Specifically, as shown in fig. 6, the locking groove 422 is provided with a flowing groove 424 facing the cutting blade 421, while the extending rod 52 is communicated with the inside of the fixed seat 51, the air pipe 53 is communicated with the inside of the fixed seat 51, and can be connected to an external air source through the air pipe 53, air is input into the fixed seat 51 through the air pipe 53 and axially extends out of the fixed seat 51 through the extending rod 52 by air pressure, the locking block 54 is movably arranged on the movable hole 521 of the extending rod 52, and the locking block 54 is provided with a shielding part positioned in the extending rod 52, when the extending rod 52 extends to enable the locking block 54 to lock the cutting blade 42, the pressure in the extending rod 52 drives the shielding part of the locking block 54 to seal the movable hole 521, at the moment, the locking block 54 is embedded into the flexible contact layer 8 to abut against the locking groove 422, and simultaneously the locking block 54 faces the side of the sliding block 61, as shown in fig. 3, when the cutter 42 performs turning cutting operation, the two ends of the cutter 42 are pressed to enable the cutter 42 to move upwards in a small extent inevitably, so that the locking groove 422 pushes the locking block 54 to slide in a small extent and retract into the extending rod 52, the shielding part of the locking block 54 does not shield the movable hole 521 any more, but the locking block 54 is still embedded into the flexible contact layer 8 and abuts against the locking groove 422 to keep locking the cutter 42, so that the air in the air pipe 53 flows to the cutter 421 through the fixing seat 51, the extending rod 52, the movable hole 521, the locking groove 422 and the outflow groove 424 in sequence, air blowing cooling is realized when the cutter 421 performs turning operation, air forming air flow can blow the cooled liquid sprayed into the cutting position of the valve core raw material to improve cooling efficiency of the cutter 42, and furthermore, the existence of the air flow can blow the waste generated by turning, thereby avoiding the abrasion of the cutter 42 caused by the falling scrap falling onto the cutter 42.
As a further embodiment of the present invention, the locking assembly further includes a pressing plate 55 and a second elastic member 56, where the pressing plate 55 is axially slidably disposed on the extending rod 52, and the extending rod 52 extends to enable the pressing plate 55 to be pressed against a side of the locking slot 422 facing away from the outflow slot 424 by the second elastic member 56.
Specifically, the pressing plate 55 is axially slidably disposed on the mounting portion 523 of the extension rod 52 through the second elastic member 56, when the extension rod 52 is driven to extend so that the locking block 54 locks and fixes the cutting knife 42, the pressing plate 55 follows the extension rod 52 to move close to the cutting knife 42 and is driven by the second elastic member 56 to approach and press against the top surface of the cutting knife 42, and further pressing of the cutting knife 42 by the pressing plate 55 is performed to realize further fixed locking of the cutting knife 42, so as to avoid reduction of machining precision caused by movement of the cutting knife 42; secondly, when the compacting plate 55 is compacted on the cutter 42, the compacting plate 55 shields the opening of the locking groove 422 facing away from one side of the outflow groove 424, so that the gas in the extending rod 52 is prevented from flowing out through the other side of the outflow groove 424, the gas outflow speed and flow rate at the outflow groove 424 are further improved, and the cooling effect and efficiency of the cutter 421 are improved.
As still another embodiment of the present invention, the engaging of the extending rod 52 with the pressing plate 55 includes at least one rotational extending stroke, and during the rotational extending stroke, the pressing plate 55 pushes the sliding block 61 to compress the first elastic member 62, and then disengages from the sliding block 61 and presses against the cutting edge 421.
Specifically, as shown in fig. 6, a movable portion 522 is disposed on the extending rod 52, as shown in fig. 7, a vertical sliding groove 511 and a rotating groove 512 which are communicated are formed in the fixed seat 51, and the movable portion 522 is movably disposed in the vertical sliding groove 511 and the rotating groove 512, so that when the extending rod 52 is extended from the fixed seat 51 under the action of air pressure, the movable portion 522 is firstly located in the vertical sliding groove 511 to vertically slide and extend the extending rod 52, then the movable portion 522 enters the rotating groove 512 to axially rotate and slidingly extend the extending rod 52 to have a rotation extending stroke, and since the locking block 54 and the compacting plate 55 are both disposed on the extending rod 52, the locking block 54 and the compacting plate 55 have a rotation extending stroke following the fixed extending rod 52;
when the extending rod 52 is extended in a vertical axial sliding manner, the locking block 54 enters the locking groove 422 due to movement, and the pressing plate 55 moves along with the extending rod 52 in a vertical axial direction; when the extending rod 52 enters the rotary extending stroke, the extending rod 52 rotates to enable the locking block 54 to rotate towards one side of the sliding block 61, so that the locking block 54 is embedded into the flexible contact layer 8 and abuts against the locking groove 422 to lock the cutting knife 42;
the pressing plate 55 also rotates along with the extension rod 52, since the sliding block 61 is located in the rotation stroke of the pressing plate 55 and the contact portion 612 and the sliding-out groove 613 are provided on the sliding block 61, the pressing plate 55 firstly rotates to abut against the contact portion 612 and push the sliding block 61 to slide and compress the first elastic member 62, and then the pressing plate 55 continues the rotation stroke to slide the pressing plate 55 from the contact portion 612 and slide out of the sliding-out groove 613, so that the pressing plate 55 is separated from the sliding block 61, and the pressing plate 55 is pressed on the top of the cutting knife 42 at this time to further lock the cutting knife 42; the cutter 42 is fixed by the pressing plate 55 after the pressure of the first elastic piece 62 is increased by the sliding block 61, so that the fixing stability of the cutter 42 is further increased; during the rotation and downward movement of the pressing plate 55, the pressing plate 55 is separated from the sliding block 61 by the sliding-out groove 613, so that the sliding block 61 is reset to the limit point by the first elastic member 62 to generate a sound which can be used for prompting the fixing of the cut-off knife 42 in place; and because the sliding block 61 is separated from the pressing plate 55, vibration is generated on the pressing plate 55, and the pressing plate 55 is connected with the extending rod 52, so that the vibration generated by separation is transmitted to the extending rod 52 to shake off impurities possibly adhered to the outer side of the movable hole 521, and the outer side of the movable hole 521 is prevented from being blocked due to the adhesion of the impurities.
Working principle: clamping valve core raw materials onto the clamping assembly 2, firstly installing and fixing the conical turning tool 41 onto the tool seat 33, then enabling the cutting tool 42 to extend into the tool seat 33 through a penetrating groove formed in the conical turning tool 41, enabling the stabilizing block 63 to slide through the entering groove 423 to abut against one end of the cutting tool 42, which is opposite to the cutting edge 421, enabling the first elastic piece 62 to be in a default state and in a compressed state, and enabling the first elastic piece 62 to drive the stabilizing block 63 to press one end of the cutting tool 42, which is opposite to the cutting edge 421;
when the extension rod 52 is extended by the air pipe 53 in a vertical and axial sliding manner, the locking block 54 enters the locking groove 422 due to movement, and the pressing plate 55 moves along with the extension rod 52 in a vertical and axial direction; when the extending rod 52 enters the rotary extending stroke, the extending rod 52 rotates to enable the locking block 54 to rotate towards one side of the sliding block 61, so that the locking block 54 is embedded into the flexible contact layer 8 and abuts against the locking groove 422 to lock the cutting knife 42; in this process, the pressing plate 55 also rotates along with the extending rod 52, since the sliding block 61 is located in the rotation stroke of the pressing plate 55 and the sliding block 61 is provided with the contact portion 612 and the sliding-out groove 613, the pressing plate 55 firstly rotates to abut against the contact portion 612 and pushes the sliding block 61 to slide and compress the first elastic member 62, and then the pressing plate 55 continues the rotation stroke to slide the pressing plate 55 from the contact portion 612 and out of the sliding-out groove 613, so that the pressing plate 55 is separated from the sliding block 61, and the pressing plate 55 is pressed on the top of the cutting blade 42 at this time to further lock the cutting blade 42, the sliding block 61 is reset to the limit point by the first elastic member 62 to generate a sound, and the sound can be used for prompting the cutting blade 42 to be fixed in place;
the holding part 341 rotates the adjusting rod 34, so that the cutter seat 33 is driven to drive the cutter set 4 to perform Y-axis moving feeding together, manual adjustment alignment of the cutter set 4 and valve core raw materials is further completed, when the cutter seat 33 is driven to move to the lower side of the horizontal movable seat 32 to perform Y-axis moving feeding as shown in fig. 3, namely, the cutter seat 33 moves to the second side surface of the horizontal movable seat 32, the cutter seat 33 drives the cutter 42 to synchronously move, and the cutter 42 moves along with the cutter and gradually approaches the sliding block 61 and compresses the first elastic piece 62, so that the pressure of the first elastic piece 62 to the right end of the cutter 42 is gradually increased; when the cutter holder 33 is driven to move to the upper side of the horizontal movable holder 32 for Y-axis moving feeding as shown in fig. 3, that is, the cutter holder 33 moves to the first side of the horizontal movable holder 32, the tooth 321 drives the worm 73 to rotate reversely due to the engagement of the following gear 731, the worm 73 drives the worm wheel 72 to rotate so that the push rod 71 approaches the sliding block 61 to axially move closer, and the push rod 71 moves to push the sliding block 61 to disengage from the limiting point, and the sliding block 61 compresses the first elastic member 62 to increase the pressure of moving the first elastic member 62 to the right side of the cutter 42.
The tool holder 33X is then driven to move axially by the feeding assembly 3 to perform turning, as shown in fig. 3, the left end cutting edge 421 of the cutting tool 42 is subjected to upward turning pressure, while the first elastic member 62 applies upward pressure to the right end of the cutting tool 42 via the stabilizing block 63 to promote the pressure applied to both ends of the cutting tool 42 to approach balance, so that both ends of the cutting tool 42 are pressed to inevitably perform small upward movement, and the locking groove 422 pushes the locking block 54 to slide slightly into the protruding rod 52, the shielding portion of the locking block 54 no longer shields the movable hole 521, but the locking block 54 is still embedded in the flexible contact layer 8 and abuts against the locking groove 422 to keep locking the cutting tool 42, so that gas in the gas pipe 53 sequentially passes through the fixing seat 51, the protruding rod 52, the movable hole 521, the locking groove 422 and the outflow groove 424 to flow to the cutting tool 42, and the finished spool workpiece can then continue to perform the spool cavity hollow operation as shown in fig. 10.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the invention, which is defined by the appended claims.
Claims (10)
1. A high-precision lathe for processing a conical surface of a valve core is characterized by comprising the following steps:
the clamping assembly (2) is used for clamping the valve core raw material and driven to vertically and axially rotate;
-a feed assembly (3) comprising a mobile feed tool holder (33), said tool holder (33) being clamped with a tool set (4), wherein:
the cutter set (4) comprises a conical surface turning tool (41) and a cutting-off cutter (42), a conical surface blade (411) is arranged on the conical surface turning tool (41), the cutting-off cutter (42) penetrates through the conical surface turning tool (41) and is arranged on the cutter seat (33), and the cutting-off blade (421) on the cutting-off cutter (42) is aligned with the tail end of the conical surface blade (411).
2. The high-precision lathe for machining a valve core conical surface according to claim 1, characterized in that the feeding assembly (3) further comprises a vertical movable seat (31) and a horizontal movable seat (32), the horizontal movable seat (32) keeps longitudinally and horizontally movable, and the cutter seat (33) is horizontally and horizontally movably arranged on the horizontal movable seat (32) so as to enable the cutter group (4) on the cutter seat to be aligned relative to the axis of the valve core raw material.
3. The high-precision lathe for machining a conical surface of a valve element according to claim 2, further comprising a drive unit for slidably disposing the cutting blade (42) on the tool holder (33), wherein the drive unit horizontally moves the cutting blade (421) with respect to the conical surface blade (411), and wherein a scale surface is disposed on a side surface of the cutting blade (42).
4. The high-precision lathe for machining a conical surface of a valve core according to claim 3, further comprising a locking assembly including a fixed seat (51) and a protruding rod (52) movably provided thereon, the protruding rod (52) being provided with a locking block (54), the protruding rod (52) being used for locking the locking block (54) to the cutoff knife (42).
5. The high-precision lathe for machining a tapered surface of a valve element according to claim 4, further comprising a stabilizing unit including a slide block (61), a first elastic member (62), and a stabilizing block (63) provided in the horizontal movable seat (32), wherein:
under the default state of the first elastic piece (62), the stabilizing block (63) always abuts against one end of the cutting knife (42) opposite to the cutting edge (421), and the abutting direction is consistent with the turning compression direction of the cutting edge (421).
6. The high-precision lathe for machining a conical surface of a valve element according to claim 5, further comprising an adjusting mechanism including a push rod (71) provided on a tool holder (33) and axially sliding with respect to a slide block (61), the tool holder (33) being located on opposite side surfaces of the horizontal movable holder (32) and sliding, wherein:
under the movement of the first side surface, the abutting rod (71) pushes the sliding block (61) to compress the first elastic piece (62);
the second side moves, and the cutoff blade (42) slides against the slide block (61) to compress the first elastic member (62).
7. The high-precision lathe for machining a conical surface of a valve core according to claim 6, further comprising an air pipe (53) which is communicated with the inside of the fixed seat (51), wherein the extending rod (52) is communicated with the inside of the fixed seat (51), the locking block (54) is movably arranged on the movable hole (521) of the extending rod (52), and the two ends of the cutting knife (42) are simultaneously stressed to enable the locking block (54) to be pressed and move to open the movable hole (521) so that the air in the air pipe (53) fills the locking groove (422) along the movable hole (521) and then flows to the cutting blade (421) along the outflow groove (424).
8. The high-precision lathe for machining a conical surface of a valve core according to claim 7, wherein the locking assembly further comprises a pressing plate (55) and a second elastic member (56), the pressing plate (55) is axially and slidably arranged on the extending rod (52), and the extending rod (52) extends so that the pressing plate (55) is pressed on the side, opposite to the outflow groove (424), of the locking groove (422) under the driving of the second elastic member (56).
9. The high-precision lathe for machining a conical surface of a valve core according to claim 8, wherein the cooperation of the protruding rod (52) and the pressing plate (55) at least comprises a rotary protruding stroke, and the pressing plate (55) pushes the sliding block (61) to compress the first elastic member (62) during the rotary protruding stroke, and then is separated from the sliding block (61) and pressed on the cutting edge (421).
10. The high-precision lathe for machining a conical surface of a valve core according to claim 9, wherein the adjusting assembly further comprises a worm wheel (72) and a worm (73) which are rotatably arranged on the tool holder (33) and are mutually coupled, the worm wheel (72) is in threaded fit with the pushing rod (71), and a gear part (731) which is coupled with a tooth part (321) on the horizontal movable holder (32) is arranged on the worm (73).
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| CN202311437660.1A CN117358955B (en) | 2023-11-01 | 2023-11-01 | High-precision lathe for machining conical surface of valve core |
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| CN202311437660.1A CN117358955B (en) | 2023-11-01 | 2023-11-01 | High-precision lathe for machining conical surface of valve core |
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| CN117358955B (en) | 2024-04-09 |
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