CN116652604B - High-precision bidirectional drilling processing technology based on stainless steel tiny parts - Google Patents
High-precision bidirectional drilling processing technology based on stainless steel tiny parts Download PDFInfo
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- CN116652604B CN116652604B CN202310637258.1A CN202310637258A CN116652604B CN 116652604 B CN116652604 B CN 116652604B CN 202310637258 A CN202310637258 A CN 202310637258A CN 116652604 B CN116652604 B CN 116652604B
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- fixedly connected
- rotary machine
- main shaft
- hole
- linear module
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- 238000005553 drilling Methods 0.000 title claims abstract description 13
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 13
- 239000010935 stainless steel Substances 0.000 title claims abstract description 13
- 238000005516 engineering process Methods 0.000 title claims abstract description 11
- 230000002457 bidirectional effect Effects 0.000 title abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 63
- 238000005498 polishing Methods 0.000 claims abstract description 13
- 238000003754 machining Methods 0.000 claims description 15
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000000428 dust Substances 0.000 description 9
- 238000004140 cleaning Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/04—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass for both machining and other metal-working operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0042—Devices for removing chips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
-
- 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)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Abstract
The invention discloses a high-precision bidirectional drilling processing technology based on a stainless steel minimum part, which belongs to the field of precision part processing and comprises a base, wherein the right part of the upper end of the base is fixedly connected with a linear module, the left end of the linear module is provided with a first rotating machine, the right end of the first rotating machine is fixedly connected with a stepping motor, the output end of the stepping motor is fixedly connected with a gear, the middle part of the first rotating machine is provided with a hole, the lower end of the hole is fixedly connected with a limiting strip, the upper part and the lower part of the middle part of the first rotating machine, which are positioned at the left end of the hole, are fixedly provided with electric telescopic blocks, the middle part of the hole is slidably connected with an ash removing structure, so that the quick processing and grinding polishing of metal bars through a front main shaft and a auxiliary main shaft and the ash removing and blanking work of the inside the metal bar processing holes can be realized, the production efficiency of products is improved, and the size and the roughness reach standard requirements.
Description
Technical Field
The invention relates to the field of precision part machining, in particular to a high-precision bidirectional drilling machining technology based on a stainless steel tiny part.
Background
At present, electronic products such as mobile phones, notebooks, optics and the like are becoming smaller and thinner, and corresponding parts are also becoming smaller and smaller, so that various technical challenges are faced to the production and manufacturing industry.
The traditional method adopts a nonstandard miniature integral inner diameter cutter to process an inner hole of a small metal part, the cutter handle and the cutter edge of the cutter are integrally formed, the cost is too high, the smaller the product hole is, the cutter is difficult to cut into the hole, the cutter is small in rigidity, the cutting quantity is small each time, the processing efficiency is low, the size is unstable, and the roughness is not easy to meet the requirement.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems existing in the prior art, the invention aims to provide a high-precision bidirectional drilling processing technology based on stainless steel tiny parts, which can realize the rapid processing, grinding and polishing of metal bars through a front main shaft and an auxiliary main shaft, and the ash cleaning and blanking work of an ash cleaning structure in a metal bar processing hole, so that the production efficiency of products is improved, and the size and the roughness meet the standard requirements.
2. Technical proposal
In order to solve the problems, the invention adopts the following technical scheme.
The utility model provides a based on two-way drilling processing technique of little part high accuracy of stainless steel, the on-line screen storage device comprises a base, the linear module of base upper end right part fixedly connected with, first rotary machine is installed to linear module left end, first rotary machine right-hand member fixedly connected with step motor, step motor output fixedly connected with gear, the hole has been seted up at first rotary machine middle part, hole lower extreme fixedly connected with spacing, the equal fixed mounting in two parts has electric telescopic block about the first rotary machine middle part is located the hole left end, hole middle part sliding connection has ash removal structure, linear module left end lower part fixed mounting has positive main shaft, positive main shaft lower part left part fixedly connected with coarse grinding drill bit, positive main shaft lower extreme left part is located coarse grinding drill bit downside fixedly connected with accurate grinding drill bit, positive main shaft rear end fixedly connected with knife rest, knife rest dismantlement is connected with cutting knife, base left end fixedly connected with second rotary machine, base middle part upper end fixedly connected with support, support upper end fixedly connected with guide pin bushing, base upper end fixedly connected with positive main shaft, vice main shaft right side fixedly connected with metal bar, second rotary machine right side fixedly connected with metal bar. The metal bar is rapidly machined, ground and polished through the front main shaft and the auxiliary main shaft, and the dust removing structure is used for removing dust and discharging materials in the metal bar machining holes, so that the production efficiency of the product is improved, and the size and the roughness meet the standard requirements.
Further, the ash removal structure includes the cylindricality pole, cylindricality pole upper end middle part fixedly connected with rack, the bar groove has been seted up at cylindricality pole lower extreme middle part, cylindricality pole left end fixedly connected with push rod, push rod left end fixedly connected with rubber ball for the metal rod after the processing can realize ash removal and unloading operation.
Further, the rack is connected with the gear in a meshed mode, and the limiting strips are matched with the strip-shaped grooves, so that the gear can drive the rack to move, and the limiting strips can control the movement direction of the strip-shaped grooves.
Further, the diameter of the rough grinding bit is 0.15mm smaller than that of the fine grinding bit, and the diameter of the polishing bit is the same as that of the fine grinding bit, so that the rough grinding bit and the fine grinding bit can punch the middle part of the metal bar, and the polishing bit can polish a machining hole.
Further, two the electric telescopic blocks clamp the metal bar, and the diameter of the metal bar is smaller than that of the hole, so that the metal bar can be inserted into the hole, and the metal bar can be limited by the electric telescopic blocks.
Further, the stepping motor is provided with a processor in the middle, and the processor is electrically connected with the electric telescopic block, so that the stepping motor can control the extension and retraction of the electric telescopic block through the processor.
Further, the middle part of the metal bar forms a processing hole in the processing process, and the diameter of the rubber ball is 0.1mm larger than that of the processing hole, so that the rubber ball can carry out ash cleaning work on scraps existing in the processing hole.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) According to the scheme, the metal bar is rapidly machined, ground and polished through the front main shaft and the auxiliary main shaft, and the dust removing structure is used for removing dust and discharging the inside of the metal bar machining hole, so that the production efficiency of the product is improved, and the size and the roughness meet the standard requirements.
(2) The ash removal structure includes the cylindricality pole, cylindricality pole upper end middle part fixedly connected with rack, and the bar groove has been seted up at cylindricality pole lower extreme middle part, cylindricality pole left end fixedly connected with push rod, push rod left end fixedly connected with rubber ball for the metal rod after the processing can realize ash removal and unloading operation.
(3) The rack is connected with the gear in a meshed manner, and the limiting strips are matched with the strip-shaped grooves, so that the gear can drive the rack to move, and the limiting strips can control the movement direction of the strip-shaped grooves.
(4) The diameter of the rough grinding bit is 0.15mm smaller than that of the fine grinding bit, and the diameter of the polishing bit is the same as that of the fine grinding bit, so that the rough grinding bit and the fine grinding bit can punch the middle part of the metal bar, and the polishing bit can polish a machining hole.
(5) The two electric telescopic blocks clamp the metal bar, the diameter of the metal bar is smaller than that of the hole, the metal bar can be inserted into the hole, and the metal bar can be limited by the electric telescopic blocks.
(6) The stepping motor is provided with a processor in the middle, and the processor is electrically connected with the electric telescopic block, so that the stepping motor can control the extension and retraction of the electric telescopic block through the processor.
(7) The metal bar forms the processing hole in the middle part in the course of working, and the diameter of rubber ball is 0.1mm more than the processing hole for the rubber ball can carry out the deashing work to the piece that exists in the processing hole.
Drawings
FIG. 1 is an overall perspective view of the present invention;
FIG. 2 is a perspective view of a body portion of the present invention;
FIG. 3 is a front side principal axis partial perspective view of the present invention;
FIG. 4 is a partial perspective view of a first rotary machine according to the present invention;
FIG. 5 is a partial cutaway perspective view of the first rotary machine of the present invention;
FIG. 6 is a partial semi-cutaway view of a first rotary machine according to the present invention;
FIG. 7 is a front view, partially in half section, of a first rotary machine according to the present invention;
FIG. 8 is a schematic diagram of the operation of a first rotary machine portion of the present invention;
FIG. 9 is an enlarged view of a portion of the working principle of the first rotary machine part of the present invention;
fig. 10 is a metal bar blanking state diagram of the present invention.
The reference numerals in the figures illustrate:
1. a base; 2. a linear module; 3. a first rotary machine; 4. a stepping motor; 5. a gear; 6. a hole; 7. a limit bar; 8. an electric telescopic block; 9. an ash removal structure; 901. a cylindrical rod; 902. a rack; 903. a bar-shaped groove; 904. a push rod; 905. rubber balls; 10. a front main shaft; 11. coarsely grinding a drill bit; 12. finely grinding the drill bit; 13. a tool holder; 14. a cutting blade; 15. a second rotary machine; 16. a bracket; 17. guide sleeve; 18. an auxiliary main shaft; 19. polishing the drill bit; 20. and (5) a metal bar.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present invention are within the protection scope of the present invention.
In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of the element of the adapting model. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1-10, the high-precision bidirectional drilling technology based on the tiny stainless steel parts comprises a base 1, a linear module 2 is fixedly connected to the right part of the upper end of the base 1, a first rotary machine 3 is installed at the left end of the linear module 2, a stepping motor 4 is fixedly connected to the right end of the first rotary machine 3, a gear 5 is fixedly connected to the output end of the stepping motor 4, a hole 6 is formed in the middle of the first rotary machine 3, a limit bar 7 is fixedly connected to the lower end of the hole 6, an electric telescopic block 8 is fixedly installed on the upper and lower parts of the middle of the first rotary machine 3, the middle of the hole 6 is slidably connected with a dust removing structure 9, a front main shaft 10 is fixedly installed on the lower part of the left end of the linear module 2, a rough grinding drill bit 11 is fixedly connected to the left part of the lower end of the front main shaft 10, a cutter rest 13 is fixedly connected to the rear end of the front main shaft 10, a cutting blade 14 is detachably connected to the cutter rest 13, a second rotary machine 15 is fixedly connected to the left end of the base 1, a bracket 16 is fixedly connected to the upper end of the base 1, a dust removing structure 17 is fixedly connected to the upper end of the bracket 16, a metal bar material is fixedly connected to the right end of the base 18, and a main shaft 18 is fixedly connected to the front main shaft 18.
Referring to fig. 4-8, the ash removing structure 9 includes a cylindrical rod 901, a rack 902 is fixedly connected to the middle part of the upper end of the cylindrical rod 901, a bar-shaped groove 903 is formed in the middle part of the lower end of the cylindrical rod 901, a push rod 904 is fixedly connected to the left end of the cylindrical rod 901, and a rubber ball 905 is fixedly connected to the left end of the push rod 904, so that ash removing and blanking operations can be realized on the processed metal bar 20. The rack 902 is meshed with the gear 5, and the limit bar 7 is matched with the bar-shaped groove 903, so that the gear 5 can drive the rack 902 to move, and the limit bar 7 can control the movement direction of the bar-shaped groove 903.
Referring to fig. 3 to 7, the diameter of the rough grinding bit 11 is 0.15mm smaller than that of the fine grinding bit 12, and the diameter of the polishing bit 19 is the same as that of the fine grinding bit 12, so that the rough grinding bit 11 and the fine grinding bit 12 can perform punching operation on the middle portion of the metal bar 20, and the polishing bit 19 can perform polishing operation on the machined hole. Two electric telescopic blocks 8 clamp the metal bar 20, and the diameter of the metal bar 20 is smaller than that of the hole 6, so that the metal bar 20 can be inserted into the hole 6, and the metal bar 20 can be limited by the electric telescopic blocks 8.
Referring to fig. 5-7, the stepping motor 4 is provided with a processor in the middle, and the processor is electrically connected with the electric telescopic block 8, so that the stepping motor 4 can control the extension and retraction of the electric telescopic block 8 through the processor. The metal bar 20 forms the processing hole in the middle part in the course of working, and the diameter of rubber ball 905 is 0.1mm bigger than the processing hole for the rubber ball 905 can carry out the deashing work to the piece that exists in the processing hole.
During processing, firstly, an unprocessed metal bar 20 passes through the guide sleeve 17 and is inserted into the middle part of the second rotary machine 15, the second rotary machine 15 is started to drive the metal bar 20 to rotate, the linear module 2 drives the front main shaft 10 to move, so that the rough grinding drill bit 11 performs first rough grinding processing on the center of the metal bar 20, then the linear module 2 drives the front main shaft 10 to move, so that the fine grinding drill bit 12 performs second fine grinding processing on the center of the metal bar 20, the second rotary machine 15 stops rotating, the linear module 2 drives the front main shaft to move forwards for a certain distance, then the linear module 2 drives the first rotary machine 3 to move leftwards, the first rotary machine 3 clamps the right end of the metal bar 20 to limit, then the first rotary machine 3 drives the metal bar 20 to rotate, the linear module 2 drives the front main shaft 10 to move, so that the cutting knife 14 cuts off the metal bar 20 through the part processed twice, and then the linear module 2 drives the first rotary machine 3 to move, so that the cut metal bar 20 is polished inside a processing hole of the polishing drill bit 19 under the driving action of the first rotary machine 3.
After the metal bar 20 is processed, the stepping motor 4 drives the gear 5 to rotate, the gear 5 drives the rack 902 to move leftwards through rotation, the rack 902 drives the ash removing structure 9 to move leftwards, the rubber ball 905 enters a processing hole to push out dust and other fragments in the processing hole, the ash removing structure 9 continues to move leftwards, when the cylindrical rod 901 is about to contact the metal bar 20, the processor in the motor 4 controls the electric telescopic block 8 to retract, the ash removing structure 9 pushes out the metal bar 20 from the first rotating machine 3, then the stepping motor 4 rotates in the direction to retract the ash removing structure 9, meanwhile, the processor controls the electric telescopic block 8 to extend, the electric telescopic block 8 prevents the metal bar 20 and the ash removing structure 9 from moving rightwards together, the metal bar 20 falls off from the left side of the ash removing structure 9, and the processing operation of the metal bar 20 is completed. The metal bar 20 can be rapidly machined, ground and polished through the front main shaft 10 and the auxiliary main shaft 18, and the dust removing structure 9 can remove dust and blanking inside the machining holes of the metal bar 20, so that the production efficiency of the product is improved, and the size and the roughness meet the standard requirements.
The above description is only of the preferred embodiments of the present invention; the scope of the invention is not limited in this respect. Any person skilled in the art, within the technical scope of the present disclosure, may apply to the present invention, and the technical solution and the improvement thereof are all covered by the protection scope of the present invention.
Claims (6)
1. Based on two-way drilling processing technique of little part high accuracy of stainless steel, including base (1), its characterized in that: the utility model discloses a base, including base (1), linear module (2) of upper end right part fixedly connected with, first rotary machine (3) are installed to linear module (2) left end, first rotary machine (3) right-hand member fixedly connected with step motor (4), step motor (4) output fixedly connected with gear (5), hole (6) have been seted up at first rotary machine (3) middle part, hole (6) lower extreme fixedly connected with spacing (7), electric telescopic piece (8) are all fixedly installed at two parts about first rotary machine (3) middle part is located hole (6) left end upper and lower part, hole (6) middle part sliding connection has ash removal structure (9), linear module (2) left end lower part fixedly connected with positive main shaft (10), positive main shaft (10) lower extreme left part fixedly connected with coarse grinding drill bit (11), positive main shaft (10) lower extreme left part is located coarse grinding drill bit (11) downside fixedly connected with fine grinding drill bit (12), positive main shaft (10) rear end fixedly connected with knife rest (13), knife rest (13) are connected with knife rest (16) fixedly connected with base (1), base (16) are connected with fixedly, the upper end of the bracket (16) is fixedly connected with a guide sleeve (17), the upper end of the base (1) is fixedly connected with an auxiliary main shaft (18), the right end of the auxiliary main shaft (18) is fixedly provided with a polishing drill bit (19), and the middle part of the second rotary machine (15) is fixedly provided with a metal bar (20); the ash removal structure (9) comprises a cylindrical rod (901), a rack (902) is fixedly connected to the middle part of the upper end of the cylindrical rod (901), a strip-shaped groove (903) is formed in the middle part of the lower end of the cylindrical rod (901), a push rod (904) is fixedly connected to the left end of the cylindrical rod (901), and a rubber ball (905) is fixedly connected to the left end of the push rod (904);
during processing, firstly, unprocessed metal bars (20) penetrate through the guide sleeve (17) and are inserted into the middle of the second rotary machine (15), the second rotary machine (15) is started to drive the metal bars (20) to rotate, the linear module (2) drives the front main shaft (10) to move, the rough grinding drill bit (11) carries out first rough grinding processing on the centers of the metal bars (20), then the linear module (2) drives the front main shaft (10) to move, the fine grinding drill bit (12) carries out second fine grinding processing on the centers of the metal bars (20), the second rotary machine (15) stops rotating, the linear module (2) drives the front main shaft to move forwards for a certain distance, then the linear module (2) drives the first rotary machine (3) to move leftwards, the first rotary machine (3) clamps the right end of the metal bars (20) to limit, then the first rotary machine (3) drives the metal bars (20) to rotate, the linear module (2) drives the front main shaft (10) to move, the cutting knife (14) cuts off the metal bars (20) through the parts processed twice, and then the linear module (2) drives the first rotary machine (3) to move under the action of the first rotary machine (20) to cut the metal bars (19).
2. The stainless steel-based high-precision bi-directional drilling machining technology for tiny parts, according to claim 1, is characterized in that: the rack (902) is connected with the gear (5) in a meshed mode, and the limit strips (7) are matched with the strip-shaped grooves (903).
3. The stainless steel-based high-precision bi-directional drilling machining technology for tiny parts, according to claim 1, is characterized in that: the diameter of the rough grinding bit (11) is 0.15mm smaller than that of the fine grinding bit (12), and the diameter of the polishing bit (19) is the same as that of the fine grinding bit (12).
4. The stainless steel-based high-precision bi-directional drilling machining technology for tiny parts, according to claim 1, is characterized in that: the two electric telescopic blocks (8) clamp the metal bar (20), and the diameter of the metal bar (20) is smaller than that of the hole (6).
5. The stainless steel-based high-precision bi-directional drilling machining technology for tiny parts, according to claim 1, is characterized in that: the stepping motor (4) is provided with a processor in the middle, and the processor is electrically connected with the electric telescopic block (8).
6. The stainless steel-based high-precision bi-directional drilling machining technology for tiny parts, according to claim 1, is characterized in that: the metal bar (20) forms a machining hole in the middle of the machining process, and the diameter of the rubber ball (905) is 0.1mm larger than that of the machining hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310637258.1A CN116652604B (en) | 2023-05-31 | 2023-05-31 | High-precision bidirectional drilling processing technology based on stainless steel tiny parts |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310637258.1A CN116652604B (en) | 2023-05-31 | 2023-05-31 | High-precision bidirectional drilling processing technology based on stainless steel tiny parts |
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| CN116652604A CN116652604A (en) | 2023-08-29 |
| CN116652604B true CN116652604B (en) | 2024-04-12 |
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