CN107971774A - A kind of novel steel tube processes clamping device - Google Patents
A kind of novel steel tube processes clamping device Download PDFInfo
- Publication number
- CN107971774A CN107971774A CN201710942532.0A CN201710942532A CN107971774A CN 107971774 A CN107971774 A CN 107971774A CN 201710942532 A CN201710942532 A CN 201710942532A CN 107971774 A CN107971774 A CN 107971774A
- Authority
- CN
- China
- Prior art keywords
- portal frame
- seat board
- clamping wheel
- axostylus axostyle
- clamping
- 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.)
- Pending
Links
Classifications
-
- 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
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
- B23K37/0533—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor external pipe alignment clamps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Clamps And Clips (AREA)
Abstract
The invention discloses a kind of novel steel tube to process clamping device,Including seat board,At the top of the seat board positioning clamping component is provided with leftward position,Riser is provided with the seat board top right side position,Threaded hole is offered in the riser,There is push threaded rod by the threaded hole screw-internal thread fit,The right end of the push threaded rod is provided with the first rotational handle,The left end of the push threaded rod is provided with pushing plate,The top of the seat board and it is provided with bracket between the positioning clamping component and riser,The carrying annular groove of supporting steel pipe is provided with the top of the bracket,Present apparatus overall structure is relatively simple,Gripping for steel pipe can be achieved by the cooperation of the first clamping wheel and the second clamping wheel,After the completion of steel pipe clamping fixation,By the rotation of the first clamping wheel and the second clamping wheel steel pipe can be driven to carry out displacement.
Description
Technical field
The present invention relates to field of machining, more particularly to a kind of novel steel tube processing clamping device.
Background technology
In field of machining, generally require just be processed operation after gripping workpiece, particularly exist
Steel pipe is welded, rupturing operation when, existing method is typically that steel pipe is directly placed in what is operated on ground, by
Irregularities in ground, cause in operation steel pipe can occur position movement, directly affect welding or cut-out quality, greatly
The big work difficulty for adding welding or cut-out.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of novel steel tube to process clamping device, it can solve above-mentioned existing
In the art the problem of.
To solve the above problems, the present invention adopts the following technical scheme that：
A kind of novel steel tube processing clamping device of the present invention, including seat board, the seat board top are set at leftward position
There is positioning clamping component, riser is provided with the seat board top right side position, threaded hole is offered in the riser, passes through institute
Stating threaded hole screw-internal thread fit has push threaded rod, and the right end of the push threaded rod is provided with the first rotational handle, described to push away
Send the left end of threaded rod to be provided with pushing plate, the top of the seat board and set between the positioning clamping component and riser
There is bracket, the carrying annular groove of supporting steel pipe is provided with the top of the bracket, the positioning clamping component includes connection institute
State the first portal frame of seat board, the lower inside of first portal frame is provided with the first axostylus axostyle, inside first portal frame
Front and rear sides wall on be symmetrically arranged with two the first sleeves for supporting first axostylus axostyle, each first sleeve and institute
State and be combined with the first screw between the first axostylus axostyle, the first clamping wheel, first folder are provided with the outside of first axostylus axostyle
Hold and be combined with clutch shaft bearing between wheel and first axostylus axostyle, two are symmetrically arranged with before and after the top of first portal frame and is inserted
Groove, is combined with the second portal frame between two slots, and two ends of second portal frame extend downward into described
The inside of first portal frame, is provided with the second axostylus axostyle between two ends of second portal frame, second portal frame
Two tip insides are symmetrically arranged with two the second sleeves for supporting second axostylus axostyle, each second sleeve with it is described
The second screw is combined between second axostylus axostyle, the second clamping wheel, second clamping are provided with the outside of second axostylus axostyle
Second bearing is combined between wheel and second axostylus axostyle, annular is respectively provided with first clamping wheel and second clamping wheel
Groove, the top middle position of first portal frame are provided with nut, and thread fitting has elevating screw thread bar, institute in the nut
State and force block is provided with the top of elevating screw thread bar, the outside of the force block is provided with the second rotational handle, the lifting spiral shell
The bottom of rasp bar is connected by rotatable at the top of fourth bearing and first portal frame, on the first portal frame end face
It is additionally provided with jack unit.
As preferable technical solution, multiple even holes, the riser and the seat are provided through at the top of the seat board
Deep floor, the deep floor triangular shape are provided between plate.
As preferable technical solution, the seat board front end face is provided with baffle, the baffle bottom at leftward position
Portion is provided with supporting plate, is fixedly connected between the baffle and the seat board by the 3rd screw, the supporting plate and the gear
Plate is an integral structure.
As preferable technical solution, the slot bottom height phase of the annular groove of first clamping wheel and the carrying annular groove
With and first clamping wheel annular groove and it is described carrying annular groove radian it is also identical, the annular of first clamping wheel
Soft bed course is both provided with groove, the annular groove of second clamping wheel and the carrying annular groove.
As preferable technical solution, the right end of the pushing plate is provided with installation set, is provided with the installation set
The 3rd bearing being connected with the push threaded rod left end.
As preferable technical solution, the distance between described bracket to the positioning clamping component is arrived less than the bracket
The distance between described riser.
As preferable technical solution, the jack unit includes being fixedly mounted on the first portal frame left side lower part
First compression bar at place and the second compression bar being fixedly mounted at the first portal frame right side lower part, first top pressure
Bar and the second compression bar are fixedly connected with the seat board upper surface respectively.
The beneficial effects of the invention are as follows：
1. the steel pipe support by that will need to process then passes through rotation in the annular groove and carrying annular groove of the first clamping wheel
Second rotational handle causes elevating screw thread bar to rotate, and elevating screw thread bar, which rotates, causes the second portal frame to move downward, second gantry
Frame, which moves downward, promotes the second clamping wheel to move downward, when the annular groove of the second clamping wheel is abutted with the steel pipe that needs are processed,
At this time, the first clamping wheel and the second clamping wheel, which are in the steel pipe that needs are processed, grips state, grips safety and stability.
2. the first clamping wheel and the second clamping wheel respectively by clutch shaft bearing and second bearing and corresponding first axostylus axostyle and
Second axostylus axostyle is rotatably connected, and rotates push threaded rod by handle, push threaded rod is rotated to left movement, pushes spiral shell
Rasp bar is to left movement, so as to promote pushing plate to left movement so that pushing plate is abutted with the steel pipe one end for needing to process, pushing plate
The steel pipe that needs process can be promoted to the left to left movement, so that the convenient steel pipe processed to needs is welded or cut work
Industry, facilitates the mechanical processing of steel pipe.
3. present apparatus overall structure is relatively simple, steel pipe can be achieved by the cooperation of the first clamping wheel and the second clamping wheel
Grip, steel pipe clamping fixation after the completion of, steel pipe can be driven by the rotation of the first clamping wheel and the second clamping wheel
Displacement is carried out, passes through the promotion of pushing plate so that operation is more light, conveniently realizes gripping for steel pipe, meets steel pipe
Welding or rupturing operation, and manufacture cost is more cheap, is adapted to promote the use of.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the overlooking the structure diagram that novel steel tube of the present invention processes clamping device；
Fig. 2 is the structure diagram of positioning clamping component in the present invention；
Fig. 3 is the left view structural representation of riser in Fig. 1.
Embodiment
The preferred embodiment of the present invention is described in detail below in conjunction with the accompanying drawings, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
Refering to shown in Fig. 1-3, a kind of novel steel tube of the invention processing clamping device, including seat board 1, the seat board 1 push up
Portion is provided with positioning clamping component 2 at leftward position, and riser 3 is provided with the 1 top right side position of seat board, described perpendicular
Threaded hole 31 is offered in plate 3, has push threaded rod 4 by 31 screw-internal thread fit of threaded hole, the push threaded rod 4
Right end is provided with the first rotational handle 401, and the left end of the push threaded rod 4 is provided with pushing plate 444, the top of the seat board 1
Portion and bracket 5 is provided between the positioning clamping component 2 and riser 3, the top of the bracket 5 is provided with supporting steel pipe
Carrying annular groove 501, first portal frame 201 of the positioning clamping component 2 including connecting the seat board 1, described first
The lower inside of portal frame 201 is provided with the first axostylus axostyle 202, symmetrical on the front and rear sides wall inside first portal frame 201
Two the first sleeves 203 for supporting first axostylus axostyle 202 are provided with, each first sleeve 203 and the first axle
The first screw 211 is combined between bar 202, is provided with the first clamping wheel 204 in the outside of first axostylus axostyle 202, described
Clutch shaft bearing 212 is combined between one clamping wheel 204 and first axostylus axostyle 202, before and after the top of first portal frame 201
It is symmetrically arranged with two slots（It is not shown）, the second portal frame 205, described second gantry are combined between two slots
Two ends of frame 205 extend downward into the inside of first portal frame 201, two ends of second portal frame 205
Between be provided with the second axostylus axostyle 206, two tip insides of second portal frame 205 are symmetrically arranged with support second axis
Two the second sleeves 207 of bar 206, are each combined with the second spiral shell between second sleeve 207 and second axostylus axostyle 206
Silk 213, the second clamping wheel 208, second clamping wheel 208 and described second are provided with the outside of second axostylus axostyle 206
Second bearing 214 is combined between axostylus axostyle 206, annular is respectively provided with first clamping wheel 204 and second clamping wheel 208
Groove 222, the top middle position of first portal frame 201 are provided with nut 223, there is thread fitting in the nut 223
Elevating screw thread bar 224, the top of the elevating screw thread bar 224 are provided with force block 225, the exterior setting of the force block 225
There is the second rotational handle 226, the bottom of the elevating screw thread bar 224 is pushed up by fourth bearing 333 and first portal frame 201
Portion is rotatably connected, and the fourth bearing 333 is fixedly connected with the top of the first portal frame 201, so that by described
Elevating screw thread bar 224 controls the lift work of second portal frame 205, described to unclamp or clamp the steel pipe for needing to process
First portal frame is additionally provided with jack unit on 201 end face.
Wherein, the top of the seat board 1 is provided through multiple company holes 121, by multiple even holes 121 easy to described in fixation
Seat board 1, is provided with deep floor 323 between the riser 3 and the seat board 1,323 triangular shape of deep floor, from
And facilitate steel pipe of push 4 side-to-side movement of threaded rod to promote needs to process.
Wherein, 1 front end face of seat board is provided with baffle 131 at leftward position, and 131 bottom of baffle is provided with
Supporting plate 132, is fixedly connected between the baffle 131 and the seat board 1 by the 3rd screw 141, the supporting plate 132 and the institute
State baffle 131 to be an integral structure, can be stopped by the baffle 131 and caused spark is processed to steel pipe, passed through
The supporting plate 132 collects part and caused chip is processed to steel pipe.
Wherein, the annular groove 222 of first clamping wheel 204 with it is described carrying annular groove 501 slot bottom highly it is identical simultaneously
And the annular groove 222 of first clamping wheel 204 is also identical with the radian of the carrying annular groove 501, first clamping wheel
It is both provided with 204 annular groove 222, the annular groove 222 of second clamping wheel 208 and the carrying annular groove 501 soft
Bed course, so as to avoid, when clamping needs the steel pipe processed, abrasion being produced to steel tube surface, so as to preferably grip needs
The steel pipe of processing.
Wherein, the right end of the pushing plate 444 is provided with installation set 445, be provided with the installation set 445 with it is described
Push the 3rd bearing that 4 left end of threaded rod is connected（It is not shown）, 444 length of pushing plate is more than the steel pipe for needing to process
Diameter so that the pushing plate 444 can promote the steel pipe that needs are processed, in order to which the steel pipe processed to needs carries out
Welding or cut-out operation.
Wherein, the bracket 5 to the distance between described positioning clamping component 2 be less than the bracket 5 to the riser 3 it
Between distance so that convenient preferably support needs the steel pipe processed.
Wherein, the jack unit includes being fixedly mounted on the first top at the 201 left side lower part of the first portal frame
Compression bar 250 and the second compression bar 251 being fixedly mounted at the 201 right side lower part of the first portal frame, first top pressure
250 and second compression bar 251 of bar is fixedly connected with 1 upper surface of seat board respectively, by the setting of jack unit, so that effectively
Increase the connectivity robustness of first portal frame 201 and the seat board 1, prevent 201 double swerve of the first portal frame.
The present invention is in use, first by annular groove 222 and institute of the steel pipe support for needing to process in first clamping wheel 204
State in carrying annular groove 501, then rotated by rotating the second rotational handle 226 elevating screw thread bar 224, institute
State elevating screw thread bar 224 to rotate so that second portal frame 205 moves downward, second portal frame 205, which moves downward, to be pushed away
Move second clamping wheel 208 to move downward, when the annular groove 222 of second clamping wheel 208 is supported with the steel pipe for needing to process
When connecing, stop operating second rotational handle 226, and at this time, first clamping wheel 204 and second clamping wheel 208 are right
The steel pipe for needing to process is in and grips state, then rotates the push threaded rod 4 by the handle 401, described to push away
Threaded rod 4 is sent to rotate to left movement, the push threaded rod 4 is to left movement, so as to promote the pushing plate 444 to transport to the left
It is dynamic so that the pushing plate 444 is abutted with the steel pipe one end for needing to process, due to first clamping wheel 204 and described second
Clamping wheel 208 passes through the clutch shaft bearing 212 and the second bearing 214 and corresponding first axostylus axostyle 202 and institute respectively
The second axostylus axostyle 206 is stated rotatably to be connected, so that the pushing plate 444 can promote the steel pipe that needs are processed to the left,
In order to which follow-up bonding machine and cutting machine weld the steel pipe processed of needs or cutting operation.
The beneficial effects of the invention are as follows：
1. the steel pipe support by that will need to process then passes through rotation in the annular groove and carrying annular groove of the first clamping wheel
Second rotational handle causes elevating screw thread bar to rotate, and elevating screw thread bar, which rotates, causes the second portal frame to move downward, second gantry
Frame, which moves downward, promotes the second clamping wheel to move downward, when the annular groove of the second clamping wheel is abutted with the steel pipe that needs are processed,
At this time, the first clamping wheel and the second clamping wheel, which are in the steel pipe that needs are processed, grips state, grips safety and stability.
2. the first clamping wheel and the second clamping wheel respectively by clutch shaft bearing and second bearing and corresponding first axostylus axostyle and
Second axostylus axostyle is rotatably connected, and rotates push threaded rod by handle, push threaded rod is rotated to left movement, pushes spiral shell
Rasp bar is to left movement, so as to promote pushing plate to left movement so that pushing plate is abutted with the steel pipe one end for needing to process, pushing plate
The steel pipe that needs process can be promoted to the left to left movement, so that the convenient steel pipe processed to needs is welded or cut work
Industry, facilitates the mechanical processing of steel pipe.
3. present apparatus overall structure is relatively simple, steel pipe can be achieved by the cooperation of the first clamping wheel and the second clamping wheel
Grip, steel pipe clamping fixation after the completion of, steel pipe can be driven by the rotation of the first clamping wheel and the second clamping wheel
Displacement is carried out, passes through the promotion of pushing plate so that operation is more light, conveniently realizes gripping for steel pipe, meets steel pipe
Welding or rupturing operation, and manufacture cost is more cheap, is adapted to promote the use of.
Basic principle, main feature and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, various changes and modifications of the present invention are possible without departing from the spirit and scope of the present invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent defines.
Claims (7)
1. a kind of novel steel tube processes clamping device, including seat board, it is characterised in that：At the top of the seat board at leftward position
Positioning clamping component is provided with, riser is provided with the seat board top right side position, threaded hole is offered in the riser, is led to
Crossing the threaded hole screw-internal thread fit has push threaded rod, and the right end of the push threaded rod is provided with the first rotational handle, institute
The left end for stating push threaded rod is provided with pushing plate, the top of the seat board and between the positioning clamping component and riser
Bracket is provided with, the carrying annular groove of supporting steel pipe is provided with the top of the bracket, the positioning clamping component includes connecting
The first portal frame of the seat board is connect, the lower inside of first portal frame is provided with the first axostylus axostyle, first portal frame
Two the first sleeves for supporting first axostylus axostyle are symmetrically arranged with internal front and rear sides wall, each first sleeve
The first screw is combined between first axostylus axostyle, is provided with the first clamping wheel on the outside of first axostylus axostyle, described
Clutch shaft bearing is combined between one clamping wheel and first axostylus axostyle, two are symmetrically arranged with before and after the top of first portal frame
A slot, is combined with the second portal frame between two slots, and two ends of second portal frame extend downward into
The inside of first portal frame, is provided with the second axostylus axostyle, described second gantry between two ends of second portal frame
Two tip insides of frame are symmetrically arranged with two the second sleeves for supporting second axostylus axostyle, each second sleeve with
The second screw is combined between second axostylus axostyle, is provided with the second clamping wheel on the outside of second axostylus axostyle, described second
Second bearing is combined between clamping wheel and second axostylus axostyle, is respectively provided with first clamping wheel and second clamping wheel
Annular groove, the top middle position of first portal frame are provided with nut, and thread fitting has elevating screw thread in the nut
Bar, is provided with force block at the top of the elevating screw thread bar, the outside of the force block is provided with the second rotational handle, the liter
The bottom for dropping threaded rod is connected by rotatable at the top of fourth bearing and first portal frame, described first gantry frame end
Jack unit is additionally provided with face.
2. novel steel tube according to claim 1 processes clamping device, it is characterised in that：The top of the seat board, which is run through, to be set
Multiple even holes are equipped with, deep floor, the deep floor triangular shape are provided between the riser and the seat board.
3. novel steel tube according to claim 1 processes clamping device, it is characterised in that：The seat board front end face is close to left
Baffle is provided with side position, the baffle bottom is provided with supporting plate, passes through the 3rd screw between the baffle and the seat board
It is fixedly connected, the supporting plate is an integral structure with the baffle.
4. novel steel tube according to claim 1 processes clamping device, it is characterised in that：The annular of first clamping wheel
Groove is highly identical with the slot bottom of the carrying annular groove and the annular groove of first clamping wheel and the carrying annular groove
Radian is also identical, in the annular groove of first clamping wheel, the annular groove of second clamping wheel and the carrying annular groove
It is provided with soft bed course.
5. novel steel tube according to claim 1 processes clamping device, it is characterised in that：The right end of the pushing plate is set
There is installation set, the 3rd bearing being connected with the push threaded rod left end is installed in the installation set.
6. novel steel tube according to claim 1 processes clamping device, it is characterised in that：The bracket is to the locating clip
The distance between component is held less than the distance between described bracket to the riser.
7. novel steel tube according to claim 1 processes clamping device, it is characterised in that：The jack unit includes fixing
The first compression bar at the first portal frame left side lower part and it is fixedly mounted on the first portal frame right side
The second compression bar at lower part, first compression bar and the second compression bar are fixedly connected with the seat board upper surface respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710942532.0A CN107971774A (en) | 2017-10-11 | 2017-10-11 | A kind of novel steel tube processes clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710942532.0A CN107971774A (en) | 2017-10-11 | 2017-10-11 | A kind of novel steel tube processes clamping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107971774A true CN107971774A (en) | 2018-05-01 |
Family
ID=62012379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710942532.0A Pending CN107971774A (en) | 2017-10-11 | 2017-10-11 | A kind of novel steel tube processes clamping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107971774A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030037061A (en) * | 2001-11-02 | 2003-05-12 | 주식회사 포스코 | A holder for treating guide roller |
| CN202935907U (en) * | 2012-11-02 | 2013-05-15 | 无锡华联科技集团有限公司 | Pipe delivery compressing mechanism |
| CN202935849U (en) * | 2012-11-02 | 2013-05-15 | 无锡华联科技集团有限公司 | Double-roller pinching mechanism for pipes |
| CN105710677A (en) * | 2016-04-18 | 2016-06-29 | 句容五星机械制造有限公司 | Auxiliary clamping mechanism for tubular and rod workpieces |
| CN205685097U (en) * | 2015-10-23 | 2016-11-16 | 向杰 | A kind of Steel pipe hold-down gag |
| CN205857479U (en) * | 2016-07-30 | 2017-01-04 | 平庆义 | A kind of architectural engineering curtain wall |
-
2017
- 2017-10-11 CN CN201710942532.0A patent/CN107971774A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030037061A (en) * | 2001-11-02 | 2003-05-12 | 주식회사 포스코 | A holder for treating guide roller |
| CN202935907U (en) * | 2012-11-02 | 2013-05-15 | 无锡华联科技集团有限公司 | Pipe delivery compressing mechanism |
| CN202935849U (en) * | 2012-11-02 | 2013-05-15 | 无锡华联科技集团有限公司 | Double-roller pinching mechanism for pipes |
| CN205685097U (en) * | 2015-10-23 | 2016-11-16 | 向杰 | A kind of Steel pipe hold-down gag |
| CN105710677A (en) * | 2016-04-18 | 2016-06-29 | 句容五星机械制造有限公司 | Auxiliary clamping mechanism for tubular and rod workpieces |
| CN205857479U (en) * | 2016-07-30 | 2017-01-04 | 平庆义 | A kind of architectural engineering curtain wall |
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Application publication date: 20180501 |