CN111604523A - Positioning and punching device for producing electromechanical products - Google Patents
Positioning and punching device for producing electromechanical products Download PDFInfo
- Publication number
- CN111604523A CN111604523A CN202010420297.2A CN202010420297A CN111604523A CN 111604523 A CN111604523 A CN 111604523A CN 202010420297 A CN202010420297 A CN 202010420297A CN 111604523 A CN111604523 A CN 111604523A
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- CN
- China
- Prior art keywords
- fixed
- punching device
- positioning
- vertically arranged
- dust collection
- Prior art date
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Classifications
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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
- 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
- B23Q11/0046—Devices for removing chips by sucking
-
- 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
- B23Q11/08—Protective coverings for parts of machine tools; Splash guards
-
- 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
- B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
- B23Q15/20—Automatic control or regulation of feed movement, cutting velocity or position of tool or work before or after the tool acts upon the workpiece
- B23Q15/22—Control or regulation of position of tool or workpiece
- B23Q15/24—Control or regulation of position of tool or workpiece of linear position
-
- 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
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- 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
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/22—Feeding members carrying tools or work
- B23Q5/28—Electric drives
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The invention belongs to the technical field of electromechanical equipment, in particular to a positioning punching device for producing electromechanical products, which aims at solving the problem that the existing punching device is inconvenient for the fixing process by clamping when a workpiece is fixed. According to the invention, under the condition that the top of the telescopic ejection column is not stressed, the telescopic spring at the bottom position can directly eject the telescopic ejection column at the top position to be kept horizontal with the top of the fixed ejection cover, when an operator places an electromechanical product workpiece to be drilled at the top of the telescopic ejection column, due to stress, the stressed part of the telescopic ejection column is directly pressed down, the telescopic spring is pressed down, the telescopic ejection column which is not stressed keeps horizontal, the electromechanical device workpiece can be fixed at a proper position, and stability is kept.
Description
Technical Field
The invention relates to the technical field of electromechanical equipment, in particular to a positioning and punching device for electromechanical product production.
Background
The punching device is a mechanical device which completes punching by applying a punching die on a material under the driving of a power mechanism after the raw material is installed, can perform the operation of forcing metal to enter the die such as sheet processing, stamping, die pressing, embossing and the like, has wider and wider application field along with the development of high and new technology, and has been expanded to the fields of machinery, medical treatment and the like from the initial national defense field and the aerospace field.
Through the retrieval, chinese patent application number is CN 108380734B's patent, discloses an effectual mechatronic punching device punches a hole, which comprises a fixing plate and i, the equal fixedly connected with landing leg in four corners department of fixed plate bottom, the rear side fixedly connected with at fixed plate top supports the riser, the positive top fixedly connected with of support riser supports the diaphragm, the mid point department fixedly connected with cylinder at support diaphragm top, the bottom of cylinder runs through the support diaphragm and extends to its outside fixedly connected with connecting plate, the bottom fixedly connected with head of punching a hole of connecting plate. The punching apparatus in the above patent has the following disadvantages: in the drilling and punching processes, the workpieces of the whole device are fixed in a clamping fixing mode, so that the whole workpieces are inconvenient to fix and the punching process is inconvenient to carry out for special-shaped equipment processing.
Disclosure of Invention
The invention provides a positioning punching device for producing an electromechanical product, which is based on the technical problem that the prior punching device is inconvenient for the fixing process through clamping when a workpiece is fixed.
The invention provides a positioning and punching device for producing an electromechanical product, which comprises a fixed machine table, wherein two ends of the top of the fixed machine table are both connected with a vertically arranged fixed top frame through bolts, the top of two fixed top frames is connected with the same horizontally arranged horizontal top frame through bolts, the middle of the top of the fixed machine table is connected with a horizontally arranged fixed top cover through bolts, a vertically arranged fixed bottom column is connected between the inner walls of the bottoms of the fixed top covers through bolts, a vertically arranged telescopic groove is formed in the inner wall of the top of the fixed bottom column, a vertically arranged sleeving block is sleeved on the inner wall of the top of the telescopic groove, a vertically arranged telescopic top column is fixed at the top of the sleeving block, the top of the telescopic top column is positioned on the inner wall of the top of the fixed top cover in a sliding sleeving manner, a vertically arranged telescopic spring is fixed in the middle of the bottom of the sleeving block, and expanding spring's bottom is connected with the bottom inner wall of fixed foundation, expanding spring is located the inside of flexible recess and cup joints, the slip recess that the level set up is seted up to the bottom inner wall of horizontal roof-rack, slip joint has the sliding block that the level set up between the both sides inner wall of slip recess, the hydraulic stem of vertical setting has been cup jointed to the bottom of sliding block, the bottom of hydraulic stem is fixed with the removal bottom block of vertical setting.
Preferably, the bottom both ends of fixed board all are fixed with the support column of vertical setting.
Preferably, the bottom of the fixed machine table is provided with a first hole, the bottom of the first hole is fixedly provided with a dust collection bottom cover which is horizontally arranged, and the top position of the dust collection bottom cover is communicated with the bottom of the fixed top cover.
Preferably, the bottom end of the fixed machine table is connected with a dust collection motor through a bolt, the air inlet end of the dust collection motor is communicated with one end of the dust collection bottom cover, and the air outlet end of the dust collection motor is sleeved with a horizontally arranged dust removal pipe.
Preferably, a vertically arranged drilling motor is fixed on the inner wall of the bottom of the movable bottom block.
Preferably, the inner walls of the two ends of the horizontal top frame are positioned in the middle of the sliding groove and are sleeved with a horizontally arranged movable screw rod through a bearing, and the circumferential outer wall of the movable screw rod is in threaded sleeve connection with the sliding block.
Preferably, one end of the horizontal top frame is connected with a horizontally arranged moving motor through a bolt, and an output shaft of the moving motor is connected with one end of the moving screw rod.
Preferably, the output shaft of the drilling motor is sleeved with a vertically arranged drilling bit.
Preferably, the bottom two ends of the movable bottom block are connected with horizontally arranged dust absorption side boxes through bolts, and the air inlet positions of the dust absorption side boxes are inclined to the positions of the drilling bits.
Preferably, one side of the movable bottom block is fixed with a vertically arranged dust collection air pipe, the bottom of the dust collection air pipe is sleeved with the dust collection side box, and the top of the dust collection air pipe is sleeved with the air inlet end of the dust collection motor.
Compared with the prior art, the invention provides a positioning and punching device for producing electromechanical products, which has the following beneficial effects:
1. this fitment hanging flower basket that security performance is high for building, under the circumstances of the top atress not through setting up flexible fore-set, the expanding spring of bottom position can be directly with the flexible fore-set jack-up of top position, keep the level with the top of fixed overhead guard, operating personnel will treat when the electromechanical product work piece of drilling is placed at the top of flexible fore-set, because the atress, the part of flexible fore-set atress directly pushes down, push down expanding spring, the flexible fore-set that does not have the atress keeps the level, can fix the electromechanical device work piece in suitable position, keep stable.
2. This fitment hanging flower basket that security performance is high for building controls the removal through the removal motor through the removal bottom block that sets up the top position, carries out the process of drilling, and the dust piece that the drilling process produced falls down to the dust absorption end cover of bottom position through the gap, carries out the dust absorption through the dust absorption fan and handles for the use of device is cleaner and tidier more.
3. This fitment hanging flower basket that security performance is high for building installs dust absorption side box through setting up in the bottom both ends position that removes the bottom block, and the piece that the top was flied up can directly absorb through dust absorption side box, absorbs to dust absorption fan inside through the dust absorption tuber pipe at top and collects, can improve the clean ability of whole device.
Drawings
FIG. 1 is a schematic sectional front view of a positioning and punching apparatus for manufacturing an electromechanical device according to the present invention;
FIG. 2 is a schematic structural view of a telescopic fixing mechanism of a positioning and punching device for producing an electromechanical product according to the present invention;
FIG. 3 is a schematic structural view of a telescopic column of the positioning and punching device for producing electromechanical products according to the present invention;
fig. 4 is a schematic structural view of a dust suction mechanism of the positioning and punching device for producing the electromechanical products.
In the figure: the device comprises a support column 1, a fixed machine table 2, a fixed top frame 3, a fixed top cover 4, a movable screw rod 5, a horizontal top frame 6, a movable bottom block 7, a drilling motor 8, a sliding block 9, a drilling bit 10, a sliding groove 11, a movable motor 12, a dust suction fan 13, a dust suction pipe 14, a dust suction bottom cover 15, a telescopic top column 16, a sleeving block 17, a fixed bottom column 18, a telescopic groove 19, a telescopic spring 20, a dust suction side box 21 and a dust suction air pipe 22.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
Example 1:
a positioning punching device for producing an electromechanical product, as shown in figures 1-3, comprises a fixed machine table 2, wherein two ends of the top of the fixed machine table 2 are both connected with a vertically arranged fixed top frame 3 through bolts, a horizontal top frame 6 horizontally arranged is connected between the tops of the two fixed top frames 3 through bolts, the middle of the top of the fixed machine table 2 is connected with a horizontally arranged fixed top cover 4 through bolts, a vertically arranged fixed bottom column 18 is connected between the inner walls of the bottom of the fixed top cover 4 through bolts, a vertically arranged telescopic groove 19 is formed in the inner wall of the top of the fixed bottom column 18, a vertically arranged sleeve joint block 17 is sleeved on the inner wall of the top of the telescopic groove 19, a vertically arranged telescopic top column 16 is fixed on the top of the sleeve joint block 17, the top of the telescopic top column 16 is positioned on the inner wall of the top of the fixed top cover 4 and is slidably sleeved, a vertically arranged telescopic spring 20 is fixed in the middle, and the bottom of expanding spring 20 is connected with the bottom inner wall of fixed foundation 18, and expanding spring 20 is located the inside of flexible recess 19 and cup joints, and the slip recess 11 that the level set up is seted up to the bottom inner wall of horizontal roof-rack 6, and the slip joint has the sliding block 9 of level setting between the both sides inner wall of slip recess 11, and the hydraulic stem of vertical setting has been cup jointed to the bottom of sliding block 9, and the bottom of hydraulic stem is fixed with the removal bottom block 7 of vertical setting.
The bottom two ends of a fixed machine table 2 are both fixed with a vertically arranged support column 1, the bottom of the fixed machine table 2 is provided with a first hole, the bottom of the first hole is fixed with a horizontally arranged dust absorption bottom cover 15, the top position of the dust absorption bottom cover 15 is communicated with the bottom of a fixed top cover 4, one end of the bottom of the fixed machine table 2 is connected with a dust absorption motor 13 through a bolt, the air inlet end of the dust absorption motor 13 is communicated with one end of the dust absorption bottom cover 15, the air outlet end of the dust absorption motor 13 is sleeved with a horizontally arranged dust removal pipe 14, the bottom inner wall of a movable bottom block 7 is fixed with a vertically arranged drilling motor 8, the inner walls of the two ends of a horizontal top frame 6 are positioned in the middle of a sliding groove 11 and are sleeved with a horizontally arranged movable screw rod 5 through a bearing, the circumferential outer wall of the movable screw rod 5 is sleeved with a sliding block 9 through a thread, one, and the output shaft of the mobile motor 12 is connected with one end of the mobile screw rod 5, and the output shaft of the drilling motor 8 is sleeved with a vertically arranged drilling bit 10.
In the embodiment, when the positioning and punching device for electromechanical product production is used, an operator firstly moves the punching device to a proper working position, fixes and stabilizes the punching device through the supporting column 1 at the bottom position, and connects the punching device to a power supply, when the punching device is used, under the condition that the top of the telescopic supporting column 16 is not stressed, the telescopic spring 20 at the bottom position can directly jack up the telescopic supporting column 16 at the top position and keep horizontal with the top of the fixed top cover 4, when the operator places an electromechanical product workpiece to be drilled at the top of the telescopic supporting column 16, due to stress, the stressed part of the telescopic supporting column 16 is directly pressed down, the telescopic spring 20 is pressed down, the telescopic supporting column 16 without stress keeps horizontal, the electromechanical device workpiece can be fixed at a proper position and keeps stable, the movable bottom block 7 at the top position is controlled and moved by the movable motor 12, and (3) drilling, wherein dust scraps generated in the drilling process fall to the dust collection bottom cover 15 at the bottom through a gap, and dust collection is carried out through the dust collection fan 13.
Example 2:
a positioning punching device for electromechanical product production is disclosed, as shown in figures 1-4, the two ends of the bottom of a movable bottom block 7 are connected with horizontally arranged dust absorption side boxes 21 through bolts, the air inlet position of each dust absorption side box 21 is inclined to the position of a drilling bit 10, a vertically arranged dust absorption air pipe 22 is fixed on one side of the movable bottom block 7, the bottom of the dust absorption air pipe 22 is sleeved with the dust absorption side boxes 21, and the top of the dust absorption air pipe 22 is sleeved with the air inlet end of a dust absorption motor 13.
When the dust collection device is used, on the basis of the first embodiment, the dust collection side boxes 21 are installed at the two ends of the bottom of the movable bottom block 7, the fragments flying from the top can be directly absorbed by the dust collection side boxes 21, and are absorbed by the dust collection air pipe 22 at the top into the dust collection fan 13 for collection, so that the cleaning capability of the whole device can be improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The positioning and punching device for the production of the electromechanical products comprises a fixed machine table (2), wherein two ends of the top of the fixed machine table (2) are both connected with a vertically arranged fixed top frame (3) through bolts, and two horizontal top frames (6) which are arranged at the same level are connected between the tops of the fixed top frames (3) through bolts, the positioning and punching device is characterized in that a horizontally arranged fixed top cover (4) is connected in the middle of the top of the fixed machine table (2) through bolts, a vertically arranged fixed bottom column (18) is connected between the inner walls of the bottom of the fixed top cover (4) through bolts, a vertically arranged telescopic groove (19) is formed in the inner wall of the top of the fixed bottom column (18), a vertically arranged telescopic connecting block (17) is sleeved on the inner wall of the top of the telescopic groove (19), a vertically arranged telescopic top column (16) is fixed at the top of the telescopic connecting block (17), the top of flexible fore-set (16) is located the top inner wall slip of fixed hood (4) and cup joints, be fixed with expanding spring (20) of vertical setting in the middle of the bottom of grafting piece (17), and the bottom of expanding spring (20) is connected with the bottom inner wall of fixed fore-set (18), expanding spring (20) are located the inside of flexible recess (19) and cup joint, the slip recess (11) that have the level to set up are seted up to the bottom inner wall of horizontal roof-rack (6), the slip joint has sliding block (9) that the level set up between the both sides inner wall of slip recess (11), the hydraulic stem of vertical setting has been cup jointed to the bottom of sliding block (9), the bottom of hydraulic stem is fixed with the removal bottom block (7) of vertical setting.
2. The positioning and punching device for the production of electromechanical products according to claim 1, wherein vertically arranged supporting columns (1) are fixed at both ends of the bottom of the fixed machine table (2).
3. The positioning and punching device for the production of electromechanical products according to claim 1, wherein a first hole is formed in the bottom of the fixed machine table (2), a horizontally arranged dust absorption bottom cover (15) is fixed at the bottom of the first hole, and the top position of the dust absorption bottom cover (15) is communicated with the bottom of the fixed top cover (4).
4. The positioning and punching device for the production of electromechanical products according to claim 3, wherein one end of the bottom of the fixed machine table (2) is connected with a dust collection motor (13) through a bolt, an air inlet end of the dust collection motor (13) is communicated with one end of a dust collection bottom cover (15), and an air outlet end of the dust collection motor (13) is sleeved with a horizontally arranged dust removal pipe (14).
5. The positioning and punching device for the production of electromechanical products according to claim 1, characterized in that a vertically arranged drilling motor (8) is fixed to the bottom inner wall of the movable bottom block (7).
6. The positioning and punching device for the production of electromechanical products according to claim 5, wherein the inner walls of the two ends of the horizontal top frame (6) are positioned in the middle of the sliding groove (11) and are sleeved with the horizontally arranged moving screw rod (5) through a bearing, and the outer wall of the circumference of the moving screw rod (5) is in threaded sleeve connection with the sliding block (9).
7. The positioning and punching device for the production of electromechanical products according to claim 6, characterized in that one end of the horizontal top frame (6) is connected with a horizontally arranged moving motor (12) through a bolt, and an output shaft of the moving motor (12) is connected with one end of a moving screw rod (5).
8. The positioning and punching device for the production of electromechanical products according to claim 5, characterized in that an output shaft of the drilling motor (8) is sleeved with a vertically arranged drilling bit (10).
9. The positioning and punching device for the production of electromechanical products according to claim 8, characterized in that the two ends of the bottom of the movable bottom block (7) are connected with horizontally arranged dust-absorbing side boxes (21) through bolts, and the air inlet positions of the dust-absorbing side boxes (21) are inclined to the position of the drilling bit (10).
10. The positioning and punching device for the production of electromechanical products according to claim 9, wherein a vertically arranged dust collection air duct (22) is fixed to one side of the movable bottom block (7), the bottom of the dust collection air duct (22) is sleeved with the dust collection side box (21), and the top of the dust collection air duct (22) is sleeved with the air inlet end of the dust collection motor (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010420297.2A CN111604523A (en) | 2020-05-18 | 2020-05-18 | Positioning and punching device for producing electromechanical products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010420297.2A CN111604523A (en) | 2020-05-18 | 2020-05-18 | Positioning and punching device for producing electromechanical products |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111604523A true CN111604523A (en) | 2020-09-01 |
Family
ID=72202086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010420297.2A Withdrawn CN111604523A (en) | 2020-05-18 | 2020-05-18 | Positioning and punching device for producing electromechanical products |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111604523A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113369538A (en) * | 2021-06-07 | 2021-09-10 | 苏州精科裕精密模架有限公司 | Vertical machining equipment and machining method |
| CN116550858A (en) * | 2023-07-10 | 2023-08-08 | 南通华敏运动用品有限公司 | Punching device and punching method for machining end workpiece of barbell rod |
-
2020
- 2020-05-18 CN CN202010420297.2A patent/CN111604523A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113369538A (en) * | 2021-06-07 | 2021-09-10 | 苏州精科裕精密模架有限公司 | Vertical machining equipment and machining method |
| CN116550858A (en) * | 2023-07-10 | 2023-08-08 | 南通华敏运动用品有限公司 | Punching device and punching method for machining end workpiece of barbell rod |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20200901 |