CN112296169A - Automatic hole puncher of deburring of polishing - Google Patents
Automatic hole puncher of deburring of polishing Download PDFInfo
- Publication number
- CN112296169A CN112296169A CN202011136436.5A CN202011136436A CN112296169A CN 112296169 A CN112296169 A CN 112296169A CN 202011136436 A CN202011136436 A CN 202011136436A CN 112296169 A CN112296169 A CN 112296169A
- Authority
- CN
- China
- Prior art keywords
- cavity
- bevel gear
- shaft
- gear
- fixedly connected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/34—Perforating tools; Die holders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/26—Perforating, i.e. punching holes in sheets or flat parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B39/00—General-purpose boring or drilling machines or devices; Sets of boring and/or drilling machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
- B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
- B24B9/04—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of metal, e.g. skate blades
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The invention discloses a puncher capable of automatically polishing and deburring, which comprises a base, a punching machine and a base, wherein a moving cavity, a punch cavity with upper and lower openings and a vertical bevel gear, a transverse bevel gear and a transverse bevel gear cavity are arranged in the punching machine, the punch cavity is positioned on the left side of the moving cavity, the vertical bevel gear is positioned on the left side of the punch cavity, the transverse bevel gear is positioned on the upper end of the vertical bevel gear and is communicated with the vertical bevel gear, a motor is fixedly connected in the right cavity wall of the vertical bevel gear, the left side of the motor is in power connection with a motor shaft, and the motor bevel gear is fixedly connected to the proper position on the motor shaft.
Description
Technical Field
The invention relates to the related field of punching machines, in particular to a puncher capable of automatically polishing and deburring.
Background
The metal punches a hole is a common technology, and is quick effective, but because the ductility that most metal material that is used for punching a hole all has, can lead to the hole of punching out to have unsmooth two faces, and the protrusion face generally still can have sharp-pointed burr limit mouth, leads to the quality of hole not good, still can influence the application in hole under the partial condition, and the burr limit mouth that generally need get rid of this face needs the corresponding process of polishing of independent design.
Disclosure of Invention
The invention aims to provide a puncher capable of automatically polishing and deburring, which can automatically remove burr and side openings while realizing metal punching.
The invention is realized by the following technical scheme.
The invention relates to a puncher capable of automatically polishing and deburring, which comprises a machine base, a punching machine and a base, wherein a moving cavity, a punch cavity with upper and lower openings and a vertical bevel gear are arranged on the left side of the moving cavity, a transverse bevel gear is arranged on the upper end of the vertical bevel gear and communicated with the vertical bevel gear, a motor is fixedly connected in the right cavity wall of the vertical bevel gear, the left side of the motor is in power connection with a motor shaft, the motor shaft is fixedly connected with a motor bevel gear in a proper position, a rotating shaft is rotatably connected between the upper cavity wall and the lower cavity wall of the transverse bevel gear and is splined with a cake bevel gear in a proper position, an extrusion spring is slidably connected between the cake bevel gear and the lower cavity wall of the transverse bevel gear, a cake gear is also splined on the upper end of the cake bevel gear, and is fixedly connected with the cake bevel gear, the cake gear right side part stretches out to the punch chamber in from the cross bevel gear chamber, remove the chamber upper chamber wall internal fixation and be connected with the pneumatic cylinder, pneumatic cylinder power connection has hydraulic piston downwards, sliding connection has the movable plate just in removing the chamber the movable plate upper end with motor bevel gear lower extreme fixed connection, the movable plate left end stretch into to in the punch chamber and in the suitable position rotation be connected with the punch, the punch upwards passes movable plate and fixedly connected with thick gear, thick gear with cake gear engagement, punch lower extreme fixedly connected with drift.
Furthermore, the machine base is provided with a large gear cavity, an upper sliding cavity with a right opening and positioned at the right end, a lower sliding cavity with a right opening and positioned at the lower side of the upper sliding cavity, and a workpiece area which is positioned between the upper sliding cavity and the lower sliding cavity and has openings at the right sides of the front side and the rear side, the upper sliding cavity is connected with a part extending out of the left side of the punching machine in a sliding way, an upper fixed shaft is rotationally connected with the left cavity wall at a proper position on the upper side of the big gear cavity, an upper spline shaft is fixedly connected to the upper fixed shaft and penetrates through the base and the upper sliding cavity rightwards to enter the punching machine, the upper spline shaft is rotationally connected with the base, the upper spline shaft is in sliding connection with the punching machine, the left side part of the motor shaft extends into the upper spline shaft and is in spline connection with the upper spline shaft.
Furthermore, be equipped with horizontal transmission chamber in the base and be located horizontal transmission chamber left end and with the vertical transmission chamber of horizontal transmission chamber intercommunication and the ascending rotation chamber of opening with horizontal transmission chamber intercommunication in horizontal transmission chamber upper end, sliding connection in the lower sliding chamber the part that base left side stretches out, the left cavity wall internal rotation of gear wheel chamber downside suitable position is connected with down the fixed axle and down fixed axle right side part fixedly connected with spline shaft down, spline shaft passes corresponding at any time frame right side and the sliding chamber gets into in the base down, be sliding connection between spline shaft and the base down, spline shaft in the spline shaft down has spline shaft and spline shaft right-hand member passes the base gets into vertical transmission chamber and rotation connection in the right cavity wall in vertical transmission chamber, spline shaft is in down part fixedly connected with under the drive gear in the gear wheel chamber, and the part of the upper spline shaft in the large gear cavity is fixedly connected with an upper transmission gear meshed with the lower transmission gear.
Furthermore, the spline transmission shaft is partially and fixedly connected with a transmission bevel gear in the vertical transmission cavity, the lower cavity wall of the transverse transmission cavity is rotationally connected with a central shaft, the upper end of the central shaft is fixedly connected with a rotary sleeve in the transverse transmission cavity, the outer ring of the rotary sleeve is fixedly connected with a bevel gear sleeve, the bevel gear sleeve is meshed with the transmission bevel gear, an opening at the upper end of the rotary cavity is rotationally connected with a rotary seat, the upper end surface of the rotary seat is fixedly connected with a polishing piece, the inner ring of the rotary seat is in splined connection with a spline sleeve, the inner ring at the side of the spline sleeve is rotationally connected with a rotary plate, a matching groove with an opening facing upwards the spline sleeve is arranged in the rotary sleeve, and a thrust spring is slidably connected between the lower cavity wall of the.
The invention has the beneficial effects that: the device simple structure does not permit the manual work to do the action alone, just can realize the automatic burr limit mouth of polishing when punching a hole on the metal, and the fault-tolerant rate is big, the simple operation, it has accelerated the speed of punching a hole to rotate simultaneously to punch a hole, promotes the quality in hole when raising the efficiency to prolonged the life of drift, the adjustment can be taken out manually to the length of equipment, changes the maximum distance at position and panel edge that punches, increases the application range of device.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1 according to an embodiment of the present invention;
FIG. 3 is an enlarged schematic view of the embodiment of the present invention at B in FIG. 1;
FIG. 4 is a schematic cross-sectional view at C-C in FIG. 1 according to an embodiment of the present invention;
fig. 5 is an enlarged schematic structural diagram at D in fig. 4 according to an embodiment of the present invention.
Detailed Description
The invention will now be described in detail with reference to fig. 1-5, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.
The puncher capable of automatically polishing and deburring comprises a base 11, a punching machine 12 and a base 13, wherein the punching machine 12 is internally provided with a moving cavity 17, a punch cavity 18 with an upper opening and a lower opening and positioned on the left side of the moving cavity 17, a vertical bevel gear 19 positioned on the left side of the punch cavity 18, and a transverse bevel gear cavity 20 positioned at the upper end of the vertical bevel gear 19 and communicated with the vertical bevel gear 19, a motor 24 is fixedly connected in the right cavity wall of the vertical bevel gear 19, the left side of the motor 24 is in power connection with a motor shaft 25, a motor bevel gear 26 is fixedly connected at a proper position on the motor shaft 25, a rotating shaft 29 is rotatably connected between the upper cavity wall and the lower cavity wall of the transverse bevel gear cavity 20, a cake bevel gear 27 is splined at a proper position on the rotating shaft 29, and an extrusion spring 30 is slidably connected between the cake bevel gear 27 and the lower cavity, the rotating shaft 29 is located at the upper end position of the cake bevel gear 27, a cake gear 28 is further in splined connection with the cake bevel gear 27, the cake bevel gear 27 is fixedly connected with the cake gear 28, the right side part of the cake gear 28 extends out of the transverse bevel gear cavity 20 to the punch cavity 18, a hydraulic cylinder 35 is fixedly connected with the inner side of the upper cavity wall of the movable cavity 17, a hydraulic piston 36 is connected with the hydraulic cylinder 35 in a downward power mode, a movable plate 33 is connected with the upper end of the movable plate 33 in the movable cavity 17 in a sliding mode, the lower end of the movable plate 33 is fixedly connected with the lower end of the motor bevel gear 26, the left end of the movable plate 33 extends into the punch cavity 18 and is rotatably connected with a punch 32 in a proper position, the punch 32 upwards penetrates through the movable plate 33 and is fixedly connected with a thick gear 31, the thick gear 31 is meshed.
Advantageously, the machine base 11 is provided therein with a large gear cavity 14, an upper sliding cavity 16 which is positioned at the right end and is open to the right, a lower sliding cavity 15 which is positioned at the lower side of the upper sliding cavity 16 and is open to the right, and a workpiece area 55 which is positioned between the upper sliding cavity 16 and the lower sliding cavity 15 and is open at the right and left sides, the upper sliding cavity 16 is connected with a part extending out of the left side of the punching machine 12 in a sliding way, an upper fixed shaft 38 is connected with the left cavity wall at a proper position on the upper side of the large gear cavity 14 in a rotating way, an upper spline shaft 37 is fixedly connected to the upper fixing shaft 38, and the upper spline shaft 37 passes through the machine base 11 and the upper sliding cavity 16 to the right and enters the punching machine 12, the upper spline shaft 37 is rotationally connected with the base 11, the upper spline shaft 37 is slidably connected with the punching machine 12, the left side part of the motor shaft 25 extends into the upper spline shaft 37 and forms a spline connection with the upper spline shaft 37.
Beneficially, a transverse transmission cavity 21 and a vertical transmission cavity 23 located at the left end of the transverse transmission cavity 21 and communicated with the transverse transmission cavity 21 and a rotating cavity 22 located at the upper end of the transverse transmission cavity 21 and communicated with the transverse transmission cavity 21 and having an upward opening are provided in the base 13, the left side of the base 13 is slidably connected with the lower sliding cavity 15, a lower fixed shaft 41 is rotatably connected with the left cavity wall at a proper position at the lower side of the large gear cavity 14 and a lower spline shaft 42 is fixedly connected with the right side of the lower fixed shaft 41, the lower spline shaft 42 passes through the corresponding random machine base 11 and the lower sliding cavity 15 rightwards to enter the base 13, the lower spline shaft 42 is slidably connected with the base 13, a spline transmission shaft 43 is connected in the lower spline shaft 42, and the right end of the spline transmission shaft 43 passes through the base 13 to enter the vertical transmission cavity 23 and is rotatably connected in the right cavity wall of the vertical transmission cavity 23, the lower spline shaft 42 is partially and fixedly connected with a lower transmission gear 40 in the large gear cavity 14, and the upper spline shaft 37 is partially and fixedly connected with an upper transmission gear 39 engaged with the lower transmission gear 40 in the large gear cavity 14.
Advantageously, a drive bevel gear 44 is fixedly connected to the splined drive shaft 43 partially in the vertical drive chamber 23, a central shaft 46 is rotationally connected with the lower cavity wall of the transverse transmission cavity 21, the upper end of the central shaft 46 is fixedly connected with a rotary sleeve 47 in the transverse transmission cavity 21, a bevel gear sleeve 45 is fixedly connected to the outer ring of the rotating sleeve 47, the bevel gear sleeve 45 is meshed with the transmission bevel gear 44, the upper end of the rotary cavity 22 is opened and rotatably connected with a rotary seat 53, the upper end surface of the rotary seat 53 is fixedly connected with a polishing disc 54, the inner ring of the rotary seat 53 is connected with a spline housing 51 in a spline mode, the inner ring at the side of the spline housing 51 is connected with a rotary plate 50 in a rotary mode, the rotary sleeve 47 is provided therein with a fitting groove 48 opening upward against the spline housing 51, a thrust spring 49 is slidably connected between the lower cavity wall of the fitting groove 48 and the lower end surface of the rotating plate 50.
Sequence of mechanical actions of the whole device:
1: in a standby state, the hydraulic piston 36 is contracted in the hydraulic cylinder 35, the corresponding moving plate 33 with the punch 32 is positioned at the uppermost end of the stroke, the thrust spring 49 is expanded to jack the rotating plate 50, the rotating plate 50 with the spline housing 51 is lifted, the spline housing 51 is not contacted with the rotating housing 47, the extrusion spring 30 is expanded to lift the cake bevel gear 27 and the cake gear 28, and the cake bevel gear 27 is disengaged from the motor bevel gear 26;
2: when preparing to punch, the motor 24 is started, the motor shaft 25 rotates to drive the upper spline shaft 37, the upper spline shaft 37 drives the lower spline shaft 42 through the upper transmission gear 39 and the lower transmission gear 40, the lower spline shaft 42 rotates to drive the spline transmission shaft 43, the punch 34 drives the rotating sleeve 47 through the transmission bevel gear 44 and the bevel gear sleeve 45, the workpiece to be punched extends into the workpiece area 55 to align and determine the position, the hydraulic cylinder 35 is started, the hydraulic cylinder 35 extends out of the hydraulic piston 36 to enable the hydraulic piston 36 to push the moving plate 33 to move downwards, the moving plate 33 moves downwards to drive the punch 32 and the thick gear 31 to move downwards, when the thick gear 31 moves downwards, a downward force is applied to the cake gear 28 through friction to enable the cake gear 28 to drive the bevel gear 27 to compress the extrusion spring 30 to move downwards, the cake bevel gear 27 is meshed with the motor bevel gear 26, the cake gear 28 drives the thick gear 31 along with the rotation, the thick gear 31 drives the punch 32 to make the punch 32 rotate and move downwards, and the punch 34 rotates and presses downwards to start punching after contacting with a workpiece;
3: when the punch 34 drills through a workpiece and then continuously extends downwards into the rotating seat 53 to be in contact with the rotating plate 50, the rotating plate 50 can rotate along with the punch 34 to prevent damage, the thrust spring 49 is compressed to move downwards under the pushing of the punch 34, the rotating plate 50 drives the spline housing 51 to move downwards, when the hydraulic cylinder 35 extends out of the hydraulic piston 36 to the limit, the spline housing 51 enters the matching groove 48 to be matched with the rotating housing 47, the rotating housing 47 can drive the spline housing 51 to rotate, the spline housing 51 drives the rotating seat 53 and the polishing sheet 54 to rotate, and the polishing sheet 54 starts to polish the surface just punched;
4: after drilling is finished, the hydraulic cylinder 35 retracts the hydraulic piston 36, the moving plate 33 drives the punch 32 to lift up, the punch 34 leaves the rear thrust spring 49 to relax right to lift the rotating plate 50 and the spline housing 51, the rotating housing 47 is disengaged from the spline housing 51, the extrusion spring 30 relaxes to lift the cake bevel gear 27 and the cake gear 28, the cake bevel gear 27 is disengaged from the motor bevel gear 26, and the device is restored to the initial state to prepare for drilling a next hole;
5: the positions of the punching machine 12 and the base 13 on the machine base 11 can be manually extracted and adjusted to change the maximum distance between the punching position and the edge of the plate material, thereby increasing the application range of the device.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (4)
1. The utility model provides an automatic hole puncher of deckle edge of polishing, includes frame, piercing press and base, its characterized in that: the punching machine is provided with a moving cavity, a punch cavity positioned at the left upper opening and the left lower opening of the moving cavity, a vertical bevel gear positioned at the left side of the punch cavity, and a transverse bevel gear cavity positioned at the upper end of the vertical bevel gear and communicated with the vertical bevel gear, a motor is fixedly connected in the right cavity wall of the vertical bevel gear, the left side of the motor is in power connection with a motor shaft, the motor shaft is fixedly connected with a motor bevel gear at a proper position, a rotating shaft is rotatably connected between the upper cavity wall and the lower cavity wall of the transverse bevel gear cavity, a cake bevel gear is splined on the rotating shaft at a proper position, an extrusion spring is slidably connected between the cake bevel gear and the lower cavity wall of the transverse bevel gear cavity, a cake gear is also splined at the position at the upper end of the cake bevel gear and is fixedly connected between the cake bevel gear and the cake gear, the cake gear punching device is characterized in that a hydraulic cylinder is fixedly connected to the inner side of the upper cavity wall of the moving cavity, a hydraulic piston is connected to the downward power of the hydraulic cylinder, a moving plate is connected to the moving cavity in a sliding mode, the upper end of the moving plate is fixedly connected with the lower end of the motor bevel gear, the left end of the moving plate extends into the punch cavity and is rotatably connected with a punch at a proper position, the punch upwards penetrates through the moving plate and is fixedly connected with a thick gear, the thick gear is meshed with the cake gear, and the lower end of the punch is fixedly connected with a punch.
2. The hole punch for automatically sanding and deflashing as set forth in claim 1, wherein: be equipped with the bull gear chamber in the frame and be located right-hand member and opening go up the sliding chamber and be located go up the opening of sliding chamber downside down the sliding chamber right with be located go up the sliding chamber with slide down between the chamber and around the equal open-ended work piece district in side right side, go up sliding connection in the sliding chamber the part that the piercing press left side was stretched out, the rotation of bull gear chamber upside suitable position left side chamber wall is connected with the fixed axle, go up fixedly connected with on the fixed axle just go up the integral key shaft and pass right the frame with it gets into to go up the sliding chamber the piercing press, go up the integral key shaft with be connected for rotating between the frame, go up the integral key shaft with be sliding connection between the piercing press, motor shaft left side part stretch into to go up in the integral key shaft and with constitute splined connection between the last integral key shaft.
3. The hole punch for automatically sanding and deflashing as set forth in claim 1, wherein: the base is internally provided with a transverse transmission cavity, a vertical transmission cavity which is positioned at the left end of the transverse transmission cavity and communicated with the transverse transmission cavity, and a rotating cavity which is positioned at the upper end of the transverse transmission cavity, communicated with the transverse transmission cavity and provided with an upward opening, the lower sliding cavity is internally provided with a part which is slidably connected with the left side of the base and extends out, the left cavity wall of the proper position at the lower side of the gear wheel cavity is rotatably connected with a lower fixed shaft, the right part of the lower fixed shaft is fixedly connected with a lower spline shaft, the lower spline shaft penetrates through the corresponding random machine base rightwards and enters the base through the lower sliding cavity, the lower spline shaft is slidably connected with the base, the spline shaft in the lower spline shaft is connected with a spline transmission shaft, the right end of the spline shaft penetrates through the base to enter the vertical transmission cavity and is rotatably connected with the right cavity wall, and the part of the upper spline shaft in the large gear cavity is fixedly connected with an upper transmission gear meshed with the lower transmission gear.
4. The hole punch for automatically sanding and deflashing as set forth in claim 1, wherein: the spline transmission shaft is arranged in the vertical transmission cavity, a transmission bevel gear is fixedly connected to the middle of the vertical transmission cavity, a central shaft is rotationally connected to the lower cavity wall of the horizontal transmission cavity, the upper end of the central shaft is fixedly connected with a rotary sleeve in the horizontal transmission cavity, the outer ring of the rotary sleeve is fixedly connected with a bevel gear sleeve, the bevel gear sleeve is meshed with the transmission bevel gear, an opening in the upper end of the rotary cavity is rotationally connected with a rotary base, a polishing piece is fixedly connected to the upper end face of the rotary base, a spline sleeve is connected to the inner ring of the rotary base in a spline connection mode, a rotary plate is rotationally connected to the inner ring of the spline sleeve in a side mode, a matching groove with an opening facing the spline sleeve upwards is formed in the rotary sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011136436.5A CN112296169A (en) | 2020-10-22 | 2020-10-22 | Automatic hole puncher of deburring of polishing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011136436.5A CN112296169A (en) | 2020-10-22 | 2020-10-22 | Automatic hole puncher of deburring of polishing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112296169A true CN112296169A (en) | 2021-02-02 |
Family
ID=74328437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011136436.5A Withdrawn CN112296169A (en) | 2020-10-22 | 2020-10-22 | Automatic hole puncher of deburring of polishing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112296169A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114160662A (en) * | 2021-12-07 | 2022-03-11 | 乐清市匠心机械有限公司 | Stamping process and equipment for sheet workpiece |
-
2020
- 2020-10-22 CN CN202011136436.5A patent/CN112296169A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114160662A (en) * | 2021-12-07 | 2022-03-11 | 乐清市匠心机械有限公司 | Stamping process and equipment for sheet workpiece |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
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Application publication date: 20210202 |