CN113458459A - But machining reducing perforating device - Google Patents
But machining reducing perforating device Download PDFInfo
- Publication number
- CN113458459A CN113458459A CN202110664337.2A CN202110664337A CN113458459A CN 113458459 A CN113458459 A CN 113458459A CN 202110664337 A CN202110664337 A CN 202110664337A CN 113458459 A CN113458459 A CN 113458459A
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- China
- Prior art keywords
- fixed
- punching
- adjusting rod
- column
- telescopic cylinder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B47/00—Constructional features of components specially designed for boring or drilling machines; Accessories therefor
-
- 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
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
The invention discloses a machining variable-diameter punching device which comprises an installation frame, a punching motor, pressing handles, a connecting sleeve, screw holes, a punching frame and a hexagon bolt, wherein the punching motor is vertically installed in the middle of the upper end of the installation frame, the lower side of a rotating shaft of the punching motor vertically penetrates through the middle of the installation frame, the pressing handles are respectively installed on the left side and the right side of the upper end of the installation frame, the connecting sleeve is vertically fixed at the lower end of the rotating shaft of the punching motor, the screw holes are respectively formed in the lower sides of the left end and the right end of the connecting sleeve, and the upper end of the punching frame is inserted in the middle of the lower end of the connecting sleeve and is fixed through the hexagon bolt. According to the invention, the motor drives the punching frame to rotate so as to realize punching, the punching frame can be rapidly disassembled and is convenient to replace and maintain, the adjustment of the diameter of the drilled hole is realized by rotating the adjusting disc to control the linear distance between the two cutter heads, and the drilling machine is more rapid and convenient compared with the replacement of different drill bits.
Description
Technical Field
The invention relates to the field of machining, in particular to a variable-diameter punching device for machining.
Background
The drilling machine tool is generally used for punching a workpiece in the field of machining, when the workpiece is large, the workpiece is difficult to be placed into the drilling machine tool, a drilling machine needs to be manually used for punching, drill bits with different diameters are selected according to the diameter of the drilled hole, different drill bits need to be continuously replaced when holes with different diameters need to be machined, the machining efficiency is greatly reduced due to frequent replacement of the drill bits, the drill bits with different sizes need to be carried when the drilling machine is carried, and more spaces can be occupied.
Disclosure of Invention
The invention aims to provide a punching device capable of reducing during machining, so as to solve the technical problem.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a but machining reducing perforating device, includes mounting bracket, the motor of punching, presses handle, connecting sleeve, screw, the frame of punching, hex bolts, the vertical motor of punching of installing in mounting bracket upper end middle part, and the vertical mounting bracket middle part that runs through of motor shaft downside of punching, the handle of pressing is respectively installed to the mounting bracket upper end left and right sides, the lower extreme of motor shaft of punching is vertical to be fixed with the connecting sleeve, and the connecting sleeve is controlled both ends downside and is respectively opened there is the screw, peg graft in connecting sleeve lower extreme middle part in the frame of punching upper end, and fix through hex bolts.
On the basis of the technical scheme, the mounting frame comprises a mounting plate, sliding blocks, a left supporting cylinder, a through groove, a right supporting cylinder, a spring, an anti-skidding sleeve and a bearing, wherein the sliding blocks are respectively fixed on the front side and the rear side of the left end of the mounting plate, and the front side and the rear side of the right end of the mounting plate are respectively fixed with a slide block, the upper side of the right end of the left supporting cylinder is vertically provided with a through groove, the left sides of the two sliding blocks at the left end of the mounting plate respectively penetrate through the through grooves of the two left supporting cylinders to be connected with the left supporting cylinders in a sliding manner, the upper sides of the left ends of the two right supporting cylinders are respectively and vertically provided with through grooves, the right sides of the two sliding blocks at the right end of the mounting plate respectively penetrate through the through grooves of the two right supporting cylinders to be connected with the right supporting cylinders in a sliding manner, springs are respectively vertically fixed at the lower sides of the inner ends of the left supporting cylinder and the right supporting cylinder, and the lower ends of the left supporting cylinder and the right supporting cylinder are respectively fixed with an anti-skidding sleeve, the middle part of the mounting plate is horizontally fixed with a bearing, and the rotating shaft of the punching motor vertically penetrates through the middle part of the bearing.
On the basis of the technical scheme, the punching frame comprises a hinged seat, a connecting column, a perforation, a left cutting leg, a right cutting leg, a mounting groove, a tool bit, a T-shaped groove, a left adjusting sleeve, a right adjusting sleeve, a circle center telescopic column, an adjusting rod, a baffle ring and an adjusting disc, wherein the connecting column is vertically fixed in the middle of the upper end of the hinged seat, the middle of the connecting column is horizontally opened with the perforation, the upper side of the connecting column is vertically inserted in the middle of the lower end of the connecting sleeve, a hexagonal bolt horizontally penetrates through the perforation and is connected with the two screw holes for fixing, the left cutting leg is hinged on the left side of the lower end of the hinged seat, the right cutting leg is hinged on the right side of the lower end of the hinged seat, the mounting groove is opened at the left end of the lower side of the left hinged leg, the tool bit is fixed at the right end of the mounting groove through the bolt, the T-shaped groove can be opened at the upper sides of the left cutting leg and the right cutting leg, the utility model discloses a telescopic hinge joint of cutting leg, including the support, the support is fixed with the support.
On the basis of the technical scheme, the circle center telescopic column comprises a fixed column, an adjusting rod perforation, a first telescopic cylinder, a second telescopic cylinder, a circle center pointer, a first spring and a second spring, the upper end of the fixed column is vertically fixed in the middle of the lower end of a hinged seat, the middle of the lower side of the fixed column is horizontally provided with the adjusting rod perforation, the middle of the adjusting rod horizontally penetrates through the adjusting rod perforation, the lower end of the fixed column is fixed with the first telescopic cylinder, the lower side of the inside of the first telescopic cylinder is vertically and slidably provided with the second telescopic cylinder, the circle center pointer is vertically and slidably arranged on the lower side of the inside of the second telescopic cylinder, the first telescopic cylinder is communicated with the inner side, the upper end of the second telescopic cylinder is vertically and fixedly provided with the first spring, the second telescopic cylinder is inner side, and the upper end of the circle center pointer is vertically and fixedly provided with the second spring.
Compared with the prior art, the invention has the following advantages: according to the invention, the motor drives the punching frame to rotate to realize punching, the punching frame can be quickly disassembled and is convenient to replace and maintain, the adjustment of the diameter of the punched hole is realized by rotating the adjusting disc to control the linear distance between the two tool bits, compared with the replacement of different drill bits, the punching device is quicker and more convenient, the punching device can be quickly placed through the circle center telescopic column according to the position of the circle center, and the punching efficiency is favorably improved.
Drawings
Fig. 1 is a schematic view of the external structure of the present invention.
Fig. 2 is a schematic view of the external structure of the mounting rack of the present invention.
FIG. 3 is a schematic view of the outer structure of the hole drilling frame of the present invention.
Fig. 4 is a schematic view of the appearance structure of the adjusting lever of the present invention.
FIG. 5 is a schematic cross-sectional view of the center telescopic column of the present invention.
Fig. 6 is a schematic view of the installation of the punching frame of the present invention.
In the figure: 1. mounting bracket, 2, punching motor, 3, pressing handle, 4, connecting sleeve, 5, screw hole, 6, punching frame, 7, hexagon bolt, 8, mounting plate, 9, slider, 10, left supporting cylinder, 11, through groove, 12, right supporting cylinder, 13, spring, 14, antiskid cover, 15, bearing, 16, hinged seat, 17, connecting column, 18, through hole, 19, left cutting leg, 20, right cutting leg, 21, mounting groove, 22, tool bit, 23, T-shaped groove, 24, left adjusting sleeve, 25, right adjusting sleeve, 26, centre of a circle flexible post, 27, adjusting rod, 28, baffle ring, 29, adjusting disk, 30, fixed column, 31, adjusting through hole, 32, first flexible cylinder, 33, second flexible cylinder, 34, centre of a circle pointer, 35 first spring, 36, second spring.
Detailed Description
The invention is explained in further detail below with reference to the figures and the specific embodiments.
As shown in fig. 1-6, but a variable diameter perforating device of machining, include mounting bracket 1, punch motor 2, press handle 3, connecting sleeve 4, screw 5, punch frame 6, hexagon bolt 7, the vertical punch motor 2 that installs in 1 upper end middle part of mounting bracket, and punch motor 2 pivot downside is vertical to run through 1 middle part of mounting bracket, 1 upper end left and right sides of mounting bracket respectively installs and presses handle 3, the vertical connecting sleeve 4 that is fixed with of lower extreme of punch motor 2 pivot, and connecting sleeve 4 controls both ends downside and respectively opens screw 5, 6 upper ends of punch frame are pegged graft in 4 lower extreme middle parts of connecting sleeve, and fix through hexagon bolt 7, and hexagon bolt 7's length can with two screw 5 threaded connection.
The mounting rack 1 comprises a mounting plate 8, sliders 9, left supporting cylinders 10, through grooves 11, right supporting cylinders 12, springs 13, anti-skidding sleeves 14 and bearings 15, wherein the sliders 9 are respectively fixed on the front side and the rear side of the left end of the mounting plate 8, the sliders 9 are respectively fixed on the front side and the rear side of the right end of the mounting plate 8, the through grooves 11 are vertically arranged on the upper sides of the right ends of the two left supporting cylinders 10, the thicknesses of the sliders 9 are the same as the widths of the sliding grooves 11, the left sides of the two sliders 9 on the left end of the mounting plate 8 respectively penetrate through the through grooves 11 of the two left supporting cylinders 10 to be slidably connected with the left supporting cylinders 10, the through grooves 11 on the left end of the two right supporting cylinders 12 are respectively vertically arranged on the upper sides of the left ends of the two right supporting cylinders 12, the right sides of the two sliders 9 on the right end of the mounting plate 8 respectively penetrate through the through grooves 11 of the two right supporting cylinders 11 to be slidably connected with the right supporting cylinders 12, the springs 13 are respectively vertically fixed on the lower sides of the inner ends of the left supporting cylinders 10 and the right supporting cylinders 12, and the anti-skidding sleeves 14 are respectively fixed on the lower ends of the left supporting cylinders 10 and the lower ends of the right supporting cylinders 12, the height that highly is less than the slider 9 lower extreme of a plurality of springs 13 upper end, mounting panel 8 middle part level is fixed with bearing 15, and the pivot of punching motor 2 is vertical to be passed bearing 15 middle part, and the pivot external diameter of punching motor 2 is the same with bearing 15 internal diameter.
The punching frame 6 comprises a hinged seat 16, a connecting column 17, a perforation 18, a left cutting leg 19, a right cutting leg 20, a mounting groove 21, a tool bit 22, a T-shaped groove 23, a left adjusting sleeve 24, a right adjusting sleeve 25, a circle center telescopic column 26, an adjusting rod 27, a baffle ring 28 and an adjusting disc 29, wherein the connecting column 17 is vertically fixed in the middle of the upper end of the hinged seat 16, the perforation 18 is horizontally formed in the middle of the connecting column 17, the outer diameter of the connecting column 17 is the same as the inner diameter of the connecting cylinder 4, the upper side of the connecting column 17 is vertically inserted in the middle of the lower end of the connecting sleeve 4, a hexagonal bolt 7 horizontally penetrates through the perforation 18 and is connected and fixed with two screw holes 5 through screw holes, the left cutting leg 19 is hinged to the left side of the lower end of the hinged seat 16, the right side of the lower end of the hinged seat 16 is hinged with the right cutting leg 20, the left cutting leg 19 and the right cutting leg 20 can rotate around the hinged seat 16, the mounting groove 21 is formed in the left end of the lower side of the left hinged leg 19, and the cutter head 22 is fixed at the left end of the mounting groove 21 by a bolt, the right end of the lower side of the right cutting leg 20 is provided with the mounting groove 21, the cutter head 22 is fixed at the right end of the mounting groove 21 by a bolt, the cutter head 22 can be rapidly detached and mounted by a bolt, the mounting groove 21 plays a role of limiting the position of the cutter head 22, the upper sides of the left cutting leg 19 and the right cutting leg 20 can be provided with T-shaped grooves 23, the upper side of the T-shaped groove 23 at the upper side of the left cutting leg 19 is hinged with a left adjusting sleeve 24, the upper side of the T-shaped groove 23 at the upper side of the right cutting leg 20 is hinged with a right adjusting sleeve 25, the upper sides of the left adjusting sleeve 24 and the right adjusting sleeve 25 are hinged with the upper sides of the two T-shaped grooves 23 respectively to enable the left adjusting sleeve 24 and the right adjusting sleeve 25 to rotate in the T-shaped groove 23 respectively, the upper end of the circle center telescopic column 26 is vertically fixed at the middle part of the lower end of the hinged seat 16, the left side and the left side of the adjusting rod 27 are horizontally and the right side connected with the left adjusting sleeve 24 and the right adjusting sleeve 25 by a thread respectively, and the middle part of the adjusting rod 27 horizontally penetrates through the upper side of the circle center telescopic column 26, the outer end of the adjusting rod 27 and the left and right sides of the circle center telescopic column 26 are respectively fixed with a baffle ring 28, the adjusting rod 27 can be limited to move while rotating through the two baffle rings 28, and the right end of the adjusting rod 27 is vertically fixed with an adjusting disc 29.
The circle center telescopic column 26 comprises a fixed column 30, an adjusting rod through hole 31, a first telescopic cylinder 32, a second telescopic cylinder 33, a circle center pointer 34, a first spring 35 and a second spring 36, wherein the upper end of the fixed column 30 is vertically fixed in the middle of the lower end of the hinged seat 16, the middle of the lower side of the fixed column 30 is horizontally and transversely provided with the adjusting rod through hole 31, the middle of the adjusting rod 27 horizontally penetrates through the adjusting rod through hole 31, the diameter of the adjusting rod through hole 31 is larger than that of the adjusting rod 27, the lower end of the fixed column 30 is fixedly provided with the first telescopic cylinder 32, the lower side of the inner part of the first telescopic cylinder 32 is vertically and slidably provided with the second telescopic cylinder 33, the diameter of the upper end of the second telescopic cylinder 33 is the same as that of the inner end of the first telescopic cylinder 32, the lower side of the inner part of the second telescopic cylinder 33 is vertically and slidably provided with the circle center pointer 34, the diameter of the upper end of the circle center pointer 34 is the same as that of the inner end of the second telescopic cylinder 33, and the inner side of the first telescopic cylinder 32, and a first spring 35 is vertically fixed at the upper end of the second telescopic cylinder 33, the diameter of the first spring 35 is smaller than that of the inner end of the first telescopic cylinder 32, a second spring 36 is vertically fixed at the upper end of the circle center pointer 34 at the inner side of the second telescopic cylinder 33, and the diameter of the second spring 36 is smaller than that of the inner end of the second telescopic cylinder 33.
The working principle of the invention is as follows: the adjusting rod 27 is rotated by rotating the adjusting disk 29, the baffle rings 28 at the two sides of the adjusting rod 27 are tightly attached to the two ends of the fixed column 30, the adjusting rod 27 is prevented from displacing when the adjusting rod 27 rotates, the left adjusting sleeve 24 horizontally moves leftwards along the adjusting rod 27 by the rotation of the adjusting rod 27 so as to drive the left cutting leg 19 to rotate clockwise, the right adjusting sleeve 25 horizontally moves rightwards along the adjusting rod 27 while the adjusting rod 27 rotates so as to drive the right cutting leg 20 to rotate anticlockwise, thereby changing the linear distance between the two cutter heads 22, so as to achieve the purpose of changing the cutting diameter, the circle center pointer 34 is vertically placed at the circle center position needing punching, the punching motor 2 is opened to drive the whole punching frame 6 to rotate, so that the two cutter heads 22 rotate around the circle center pointer 34, and the two sliding blocks 9 at the left end and the right end of the mounting plate 8 vertically slide downwards along the two left supporting cylinders 10 and the two right supporting cylinders 10 respectively by pressing the two pressing handles 3 downwards, the two tool bits 22 are continuously close to the workpiece, and are continuously pressed until the punching is completed, the circle center pointer 34 retracts towards the inside of the second retraction cylinder 33 in the pressing process, and the second retraction cylinder 33 retracts towards the inside of the first retraction cylinder 32.
The foregoing is a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that variations, modifications, substitutions and alterations can be made in the embodiment without departing from the principles and spirit of the invention.
Claims (4)
1. The utility model provides a but machining reducing perforating device, includes mounting bracket (1), punching motor (2), presses handle (3), connecting sleeve (4), screw (5), punches frame (6), hex bolts (7), its characterized in that: the utility model discloses a punching machine, including mounting bracket (1), punch motor (2), and punch motor (2) pivot downside is vertical to run through mounting bracket (1) middle part, mounting bracket (1) upper end left and right sides respectively installs and presses down handle (3), the lower extreme of punch motor (2) pivot is vertical to be fixed with connecting sleeve (4), and connecting sleeve (4) control both ends downside and respectively open screw (5), peg graft in connecting sleeve (4) lower extreme middle part in the upper end of frame of punching (6), and fix through hex bolts (7).
2. The variable-diameter machining punching device according to claim 1, wherein: the mounting rack (1) comprises a mounting plate (8), sliders (9), left supporting cylinders (10), through grooves (11), right supporting cylinders (12), springs (13), an anti-skidding sleeve (14) and bearings (15), wherein the sliders (9) are respectively fixed on the front side and the rear side of the left end of the mounting plate (8), the sliders (9) are respectively fixed on the front side and the rear side of the right end of the mounting plate (8), the through grooves (11) are vertically formed in the upper sides of the right ends of the two left supporting cylinders (10), the left sides of the two sliders (9) at the left end of the mounting plate (8) respectively penetrate through the through grooves (11) of the two left supporting cylinders (10) to be connected with the left supporting cylinders (10) in a sliding manner, the through grooves (11) are respectively vertically formed in the upper sides of the left ends of the two right supporting cylinders (12), the right sides of the two sliders (9) at the right end of the mounting plate (8) respectively penetrate through the through grooves (11) of the two right supporting cylinders (11) to be connected with the right supporting cylinders (12) in a sliding manner, the anti-skidding type drilling machine is characterized in that springs (13) are vertically fixed to the lower sides of the inner ends of the left supporting cylinder (10) and the right supporting cylinder (12), anti-skidding sleeves (14) are fixed to the lower ends of the left supporting cylinder (10) and the right supporting cylinder (12), bearings (15) are horizontally fixed to the middle of the mounting plate (8), and a rotating shaft of the drilling motor (2) vertically penetrates through the middle of the bearings (15).
3. The variable-diameter machining punching device according to claim 1, wherein: the punching frame (6) comprises a hinged seat (16), a connecting column (17), a perforation (18), a left cutting leg (19), a right cutting leg (20), a mounting groove (21), a tool bit (22), a T-shaped groove (23), a left adjusting sleeve (24), a right adjusting sleeve (25), a circle center telescopic column (26), an adjusting rod (27), a baffle ring (28) and an adjusting disc (29), wherein the connecting column (17) is vertically fixed in the middle of the upper end of the hinged seat (16), the perforation (18) is horizontally formed in the middle of the connecting column (17), the upper side of the connecting column (17) is vertically inserted in the middle of the lower end of the connecting sleeve (4), a hexagonal bolt (7) horizontally penetrates through the perforation (18) and is connected and fixed with two screw holes (5), the left cutting leg (19) is hinged to the left side of the lower end of the hinged seat (16), and the right side of the lower end of the hinged seat (16) is hinged with the right cutting leg (20), the left end of the lower side of the left hinged leg (19) is provided with a mounting groove (21), a tool bit (22) is fixed at the left end of the mounting groove (21) through a bolt, the right end of the lower side of the right cutting leg (20) is provided with the mounting groove (21), the tool bit (22) is fixed at the right end of the mounting groove (21) through a bolt, a T-shaped groove (23) can be formed on the upper sides of the left cutting leg (19) and the right cutting leg (20), a left adjusting sleeve (24) is hinged on the upper side of the T-shaped groove (23) on the upper side of the left cutting leg (19), a right adjusting sleeve (25) is hinged on the upper side of the T-shaped groove (23) on the upper side of the right cutting leg (20), the upper end of a circle center telescopic column (26) is vertically fixed in the middle part of the lower end of the hinged seat (16), the left side and the right side of the adjusting rod (27) are respectively connected with the left adjusting sleeve (24) and the right adjusting sleeve (25) through horizontal threads, and the middle part of the adjusting rod (27) horizontally penetrates through the upper side of the circle center telescopic column (26), the adjusting rod is characterized in that the outer end of the adjusting rod (27) and the left side and the right side of the circle center telescopic column (26) are respectively fixed with a baffle ring (28), and the right end of the adjusting rod (27) is vertically fixed with an adjusting disc (29).
4. The variable-diameter machining punching device according to claim 3, wherein: the circle center telescopic column (26) comprises a fixed column (30), an adjusting rod through hole (31), a first telescopic cylinder (32), a second telescopic cylinder (33), a circle center pointer (34), a first spring (35) and a second spring (36), the upper end of the fixed column (30) is vertically fixed in the middle of the lower end of the hinged seat (16), the adjusting rod through hole (31) is horizontally and transversely formed in the middle of the lower side of the fixed column (30), the middle of the adjusting rod (27) horizontally penetrates through the adjusting rod through hole (31), the lower end of the fixed column (30) is fixed with the first telescopic cylinder (32), the second telescopic cylinder (33) is vertically and slidably mounted on the lower side inside the first telescopic cylinder (32), the circle center pointer (34) is vertically and slidably mounted on the lower side inside the second telescopic cylinder (33), the first telescopic cylinder (32) is arranged on the inner side of the first telescopic cylinder (33), and the first spring (35) is vertically fixed on the upper end of the second telescopic cylinder (33), a second spring (36) is vertically fixed at the inner side of the second telescopic cylinder (33) and at the upper end of the circle center pointer (34).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110664337.2A CN113458459A (en) | 2021-06-16 | 2021-06-16 | But machining reducing perforating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110664337.2A CN113458459A (en) | 2021-06-16 | 2021-06-16 | But machining reducing perforating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113458459A true CN113458459A (en) | 2021-10-01 |
Family
ID=77869968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110664337.2A Withdrawn CN113458459A (en) | 2021-06-16 | 2021-06-16 | But machining reducing perforating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113458459A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115246076A (en) * | 2022-04-29 | 2022-10-28 | 中国一冶集团有限公司 | Dustproof punching equipment with self-adaptive adjustment of hole diameter and punching method thereof |
-
2021
- 2021-06-16 CN CN202110664337.2A patent/CN113458459A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115246076A (en) * | 2022-04-29 | 2022-10-28 | 中国一冶集团有限公司 | Dustproof punching equipment with self-adaptive adjustment of hole diameter and punching method thereof |
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Application publication date: 20211001 |
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| WW01 | Invention patent application withdrawn after publication |