CN106903520B - A kind of clamp assembly of clamping square cross - Google Patents
A kind of clamp assembly of clamping square cross Download PDFInfo
- Publication number
- CN106903520B CN106903520B CN201710121734.9A CN201710121734A CN106903520B CN 106903520 B CN106903520 B CN 106903520B CN 201710121734 A CN201710121734 A CN 201710121734A CN 106903520 B CN106903520 B CN 106903520B
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- Prior art keywords
- grip block
- clamping
- workpiece
- spring
- clamp assembly
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Classifications
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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
- 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
-
- 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
Abstract
A kind of clamp assembly of clamping square cross, including clamp assembly (3), it is characterized by: the clamp assembly (3) includes shell (31), being provided in the middle part of the shell (31) can be relatively close in left and right directions and with respect to two grip blocks deviated from: left grip block (42) and right grip block (41) are respectively arranged with left spring (421) and right spring (411) between the bottom right extended spot and the shell (31) of the left grip block (42), at the lower-left stretching of the right grip block (41) between institute's shell (31).
Description
Technical field
This application involves machine-building equipment field, specially a kind of clamp assembly of clamping square cross.
Background technique
CNC milling machine can be wide with processing technology range, and precision is higher, so using increasingly wider.But current processing object is
The workpiece of processing is mostly the rectangular or cylindrical workpiece of regular shape.When processing rectangular piece, mostly use versatility stronger
Flat-nose pliers clamping workpiece, in batch production, since the scale error or blank dimension of workpiece itself are in the same size, in replacement work
Need again to determine knife the origin of workpiece coordinate system when part, so as to cause processing when non-cutting time it is too long, processing efficiency by
To certain influence.
Summary of the invention
The object of the present invention is to provide a kind of clamp assembly of clamping square cross, can overcome it is in the prior art after
State defect.
A kind of clamp assembly of clamping square cross according to the present invention, including clamp assembly, it is characterised in that: the folder
Having component includes shell, and the housing central section is provided with can be relatively close in left and right directions and with respect to two grip blocks deviated from:
Left grip block and right grip block, between the bottom right extended spot and the shell of the left grip block, a left side for the right grip block
It is respectively arranged with left spring and right spring between institute's shell at lower stretching, left side and the right clamping in the left grip block
One is each provided on the right side of block can go up the left wedge block and right wedge block of downslide, between the left wedge block and the left grip block
And be in contact between the right wedge block and the right grip block with inclined-plane, the lower end of the left wedge block and the right wedge block
Face is provided with inclined-plane, and the inclined-plane holds out against portion and the right inclined-plane held out against above portion with a gradient left side with clamp bracket two sides and is in contact,
The upper end of the left wedge block and right wedge block be each provided with a spring, between the left grip block and right grip block in
Portion be provided with one be fixedly connected with the lifting screw for extending downward and through housing central section boss on the determination workpiece
The top plate of lower direction position, the axial elongated slot of the lifting screw setting one and anti-rotation teeth portion phase wedging, the lower part of lifting screw
It is provided with a nut, the nut is integrally fixed with the worm gear in the Worm Wheel System being made of worm gear and worm shaft, institute
The front-rear side walls that worm shaft front-rear direction is installed and is erected at the shell are stated, the clamp bracket includes that a left side holds out against portion, right top
Tight portion and the connection left side hold out against portion and the right side and hold out against the pushing part in portion, and one and clamping are provided in the middle part of the pushing part
The screw hole that the lines of the push rod front of motor mutually screws is jacked, is arranged on the push rod between the front inner wall and pushing part of shell
There are a clutch and a driving pulley, driving pulley passes through lifting and driving band connection with the drive pulley being mounted on worm shaft,
The through-hole of a centering component for installing front-rear direction centering, the centering component are additionally provided at the top of the left grip block
Including shape L-shaped fore-stock and after-poppet, the fore-stock includes columned preceding guide part and front clamp portion, described
A back bevel is arranged in the end of preceding guide part, and there are two face contacts in clamping and on front side of workpiece for the inside setting in front clamp portion
On idler wheel, the annulus before the preceding guide part is provided with one at the back bevel, the preceding annulus and the left grip block
Through-hole between a front stretching spring is installed, preceding guide part be provided at front clamp portion one with before the through-hole on left grip block
The feather key of the sliding cooperation of portion's axial direction straight trough, the after-poppet includes columned rear guide part and rear clamping part, is led after described
One front bevel is set to the end in portion, there are two the rollings in clamping with face contact on front side of workpiece for the inside setting of rear clamping part
It takes turns, the annulus after the rear guide part is provided with one at the front bevel, on the rear annulus and the left grip block
Adjustable spring after installation one, rear guide part are provided with one and the through-hole rear portion on left grip block at rear clamping part between through-hole
The feather key of the sliding cooperation of axial straight trough, a two sides is equipped between the front bevel and back bevel, top in the slope is arranged
Pin, the ejector pin right end stretches out the work department of left grip block, and left end is provided with a centering spring, when the left grip block and described
Right grip block is relatively close and when clamping workpiece, the workpiece is first contacted with the ejector pin, described during gradually clamping
Ejector pin is headed into the left grip block, meanwhile, the preceding guide part and rear guide part are respectively in the front stretching spring with after
The front clamp portion and the rear clamping part is made to move inward and realize that the workpiece front and back is right under the action of adjustable spring
Middle positioning, the clamping jack and are provided with silencing means on motor.
Further technical solution is equipped with conveyer belt for conveying completion of processing workpiece in the clamp assembly right
Chute feeder, be provided with storagetank on the left of the clamp assembly, be equipped with positioned at the storagetank above for pushing dividing for workpiece
Expect pushing meanss, workpiece is processed on vertical numerical control milling machine after positioning clamping in the clamp assembly, after completion of processing
Workpiece is seen off to required next website by the chute feeder.
Further technical solution, when the clamping jacking motor drives the pushing part to move inward, the left wedge
Tight block and right wedge block move up, to push the left grip block and right grip block is relatively close and clamping workpiece, work as institute
When stating clamping jacking motor the pushing part being driven to move outward, the left wedge block and right wedge block are in the spring and bullet
It is moved down under the action of spring, meanwhile, the left grip block and the right grip block are respectively in the left spring and the right bullet
It is opposite under the action of spring to deviate from and unclamp workpiece.
Further technical solution, when the clutch is engaged with driving pulley, by described in the promotion of lifting and driving band
Worm shaft rotation, then drives the worm gear to rotate, and the lifting screw generates the movement of lifting and makes workpiece in above-below direction
Realize positioning.
Further technical solution, the silencing means are set on the outside of the clamping jacking motor, the silencing means
Interior to be filled with silencing cotton, the silencing cotton is used to absorb the noise that the clamping jacking motor work generates.
Through the invention, automatic centering around workpiece being made to realize in clamping process in both direction, it is ensured that
Workpiece only needs once when processing on CNC milling machine to knife in batch.Due to be provided with can the sliding grip block in left and right, pass through clamping
The back-and-forth motion of frame, while keeping left grip block synchronous with right grip block relatively close and realize the centering positioning of left and right directions
It realizes the clamping to workpiece, simultaneously as being provided with the spring of left and right spring and wedge block upper end, two grip blocks of left and right is made to exist
Reliable operation when deviating from opposite directions；Due to being provided with centering component, in left and right, grip block is relatively close and during clamping workpiece,
Ejector pin is pressed into left grip block and makes fore-stock and after-poppet while pressing to workpiece by the workpiece, to make workpiece in front-rear direction
Also self-centering function is realized；Due to being provided with lifting screw, workpiece can be risen into required position before clamping, made
Workpiece top surface rises from the certain height in left and right grip block top surface, prevent in process jaw by cutter institute mill off, in addition,
Lifting screw can also be used to after work pieces process is complete workpiece ejecting jaw, in order under the promotion of sub-material pushing meanss by work
Part is pushed into chute feeder；Due to being provided with clutch, two movements of clamping and jacking are completed by clamping jacking motor, reduce electricity
Machine quantity, reduces manufacturing cost.Whole equipment structure is relatively simple, and stabilized structure, cost is relatively low, reliable for operation, can replace
For manual maintenance, drawing-in type is carried out for controller cabinet and clears up dedusting, guarantees the normal operation of controller cabinet；Not only it is able to achieve square
Shape workpiece in the both direction of front and rear, left and right to middle positioning, reduce the non-cutting time of process operation, and realize workpiece
The control of top surface stretching grip block distance, it is ensured that the safety of process operation.
Detailed description of the invention
Fig. 1 is the overall mechanism schematic diagram of the clamp assembly of clamping square cross of the invention；
Fig. 2 is the main view of the clamp assembly in Fig. 1；
Fig. 3 is the top view of the clamp assembly in Fig. 1；
Fig. 4 is the enlarged diagram of the centering component in Fig. 3.
Specific embodiment
Above in conjunction with Fig. 1-4, the present invention is described in detail.
A kind of clamp assembly of clamping square cross according to the embodiment, including clamp assembly 3, it is characterised in that: described
Clamp assembly 3 includes shell 31, and being provided in the middle part of the shell 31 can relatively close in left and right directions and opposite two deviated from
Grip block: left grip block 42 and right grip block 41, between the bottom right extended spot and the shell 31 of the left grip block 42, institute
It states and is respectively arranged with left spring 421 and right spring 411 between institute's shell 31 at the lower-left stretching of right grip block 41, on the left side
The left side of grip block 42 and the right side of the right grip block 41, which are each provided with one, can go up the left wedge block 52 and right wedge block of downslide
51, with oblique between the left wedge block 52 and the left grip block 42 and between the right wedge block 51 and the right grip block 41
Face is in contact, and the lower end surface of the left wedge block 52 and the right wedge block 51 is provided with inclined-plane, the inclined-plane and clamp bracket
60 two sides hold out against portion 62 and the right inclined-plane held out against above portion 61 with a gradient left side and are in contact, the left wedge block 52 and right wedge block 51
Upper end be each provided with a spring 521,511, the middle part between the left grip block 42 and right grip block 41 be provided with one with
Extend downward and through that the lifting screw 83 of housing central section boss is fixedly connected to determination workpiece up and down direction position
Top plate 80, the axial elongated slot 86 of the lifting screw 83 setting one and 85 phase wedging of anti-rotation teeth portion, the lower part of lifting screw 83
It is provided with a nut 84, the nut 84 and the worm gear 81 in the Worm Wheel System being made of worm gear 81 and worm shaft 82 are fixed
Integrally, the front-rear side walls of the shell 31 are installed and be erected to 82 front-rear direction of worm shaft, and the clamp bracket 60 is wrapped
Left portion 62, right portion 61 and the connection left side of holding out against of holding out against is included to hold out against portion 62 and the right side and hold out against the pushing part 63 in portion 61, it is described
The screw hole that the lines for 90 front of push rod that one jacks motor 9 with clamping mutually screws is provided in the middle part of pushing part 63, shell 31
Be provided with a clutch 91 and a driving pulley 921 on push rod 90 between front inner wall and pushing part 63, driving pulley 921 with
The drive pulley 922 being mounted on worm shaft 82 is connected by lifting and driving band 92, and the top of the left grip block 42 is also set up
There is the through-hole of a centering component for installing front-rear direction centering, the centering component includes the L-shaped fore-stock of shape
And after-poppet, the fore-stock include columned preceding guide part 71 and front clamp portion 711, the end of the preceding guide part 71 is set
Set a back bevel 715, the inside setting in front clamp portion 711 there are two the idler wheel 730 in clamping with face contact on front side of workpiece,
Annulus 714 before the preceding guide part 71 is provided with one at the back bevel 715, the preceding annulus 714 and the left clamping
One front stretching spring 713 is installed, preceding guide part 71 is provided with one and left folder at front clamp portion 711 between the through-hole on block 42
The feather key 712 of the sliding cooperation of through-hole front axial direction straight trough 422 on block 42 is held, the after-poppet includes columned rear guiding
A front bevel 725 is arranged in the end of portion 72 and rear clamping part 721, the rear guide part 72, and the inside of rear clamping part 721 is provided with
Two idler wheels 730 in clamping with face contact on front side of workpiece, guide part 72 is arranged at the front bevel 725 after described
Annulus 724 after having one, it is described after adjustable spring 723 after installation one between through-hole on annulus 724 and the left grip block 42, after
Guide part 72 is provided with one and the sliding cooperation of through-hole rear portion axial direction straight trough 424 on left grip block 42 at rear clamping part 721
Feather key 722, a two sides are installed between the front bevel 725 and back bevel 715, ejector pin 70 in the slope are set, it is described
70 right end of ejector pin stretches out the work department of left grip block, and left end is provided with a centering spring 73, when the left grip block 42 and described
Right grip block 41 is relatively close and when clamping workpiece, the workpiece is first contacted with the ejector pin 70, during gradually clamping,
The ejector pin 70 is headed into the left grip block 42, meanwhile, the preceding guide part 71 and rear guide part 72 are respectively before described
Make the front clamp portion 711 and the rear clamping part 721 under the action of adjustable spring 713 and rear adjustable spring 723 inwardly
It moves and realizes centering positioning before and after the workpiece, be provided with silencing means 901 on the clamping jacking motor 9.
Wherein, conveyer belt is installed with the chute feeder 2 for conveying completion of processing workpiece in 3 right of clamp assembly,
It is provided with storagetank 10 on the left of the clamp assembly 3, is equipped with above the storagetank 10 for pushing the sub-material of workpiece to push away
Dynamic device 11, workpiece are processed on vertical numerical control milling machine after positioning clamping in the clamp assembly 3, after completion of processing by
The chute feeder 2 sees workpiece to required next website off.
Wherein, when the clamping jacking motor 9 drives the pushing part 63 to move inward, the left wedge block 52 and the right side
Wedge block 51 moves up, so that the left grip block 42 is pushed and right grip block 41 is relatively close and clamping workpiece, when described
When clamping jacking motor 9 drives the pushing part 63 to move outward, the left wedge block 52 and right wedge block 51 are in the bullet
It is moved down under the action of spring 521 and spring 511, meanwhile, the left grip block 42 and the right grip block 41 are respectively described
It is opposite under the action of left spring 421 and the right spring 411 to deviate from and unclamp workpiece.
Wherein, when the clutch 91 is engaged with driving pulley 921, the worm shaft is pushed by lifting and driving band 92
82 rotations, then drive the worm gear 81 to rotate, and the lifting screw 83 generates the movement of lifting and makes workpiece in above-below direction
Realize positioning.
Wherein, the silencing means 901 is set in 9 outside of clamping jacking motor, filling in the silencing means 901
There is silencing cotton, the silencing cotton is used to absorb the noise that the clamping jacking work of motor 9 generates.
The clamping jacking motor can be stepper motor, be also possible to AC servo motor.
The automatic centering around present apparatus can be such that workpiece realizes in clamping process in both direction, it is ensured that in batch
Workpiece only needs once when processing on CNC milling machine to knife.
Due to making left grip block and right clamping by the back-and-forth motion of clamp bracket provided with the grip block that can control cunning
Block synchronizes the clamping realized while centering positioning that is relatively close and realizing left and right directions to workpiece, simultaneously as setting
The spring of left and right spring and wedge block upper end, make two grip blocks of left and right it is opposite away from when reliable operation.
Due to being provided with centering component, in left and right, grip block is relatively close and during clamping workpiece, the workpiece will
Ejector pin is pressed into left grip block and makes fore-stock and after-poppet while pressing to workpiece, so that workpiece be made also to realize automatically in front-rear direction
Centering function.
Due to being provided with lifting screw, workpiece can be risen into required position before clamping, make workpiece top surface liter
The certain height in left and right grip block top surface out, prevents in process that jaw is by cutter institute mill off, in addition, lifting screw is also
It can be used for after work pieces process is complete workpiece ejecting jaw, in order to which workpiece is pushed into feeding under the promotion of sub-material pushing meanss
Slot.
Due to being provided with clutch, two movements of clamping and jacking are completed by clamping jacking motor, reduce motor number
Amount, reduces manufacturing cost.Whole equipment structure is relatively simple, and stabilized structure, cost is relatively low, reliable for operation, can substitute people
Work maintenance carries out drawing-in type for controller cabinet and clears up dedusting, guarantees the normal operation of controller cabinet；Not only it is able to achieve rectangle work
Part in the both direction of front and rear, left and right to middle positioning, reduce the non-cutting time of process operation, and realize workpiece top surface
Stretch out the control of grip block distance, it is ensured that the safety of process operation.
By later mode, those skilled in the art can make according to operating mode various within the scope of the invention
Change.
Claims (5)
1. a kind of clamp assembly of clamping square cross, including clamp assembly (3), it is characterised in that: clamp assembly (3) includes shell
Body (31), shell (31) middle part is provided with can be relatively close in left and right directions and with respect to two grip blocks deviated from: left grip block
(42) and right grip block (41), between the bottom right extended spot and shell (31) of left grip block (42), a left side for right grip block (41)
Left spring (421) and right spring (411) are respectively arranged at lower stretching between institute's shell (31), on a left side for left grip block (42)
One is each provided on the right side of side and right grip block (41) can go up the left wedge block (52) and right wedge block (51) of downslide, left wedge block
(52) it is in contact between left grip block (42) and between right wedge block (51) and right grip block (41) with inclined-plane, left wedge block
(52) and the lower end surface of right wedge block (51) is provided with inclined-plane, and inclined-plane and clamp bracket (60) two sides band gradient left side hold out against portion (62)
It holds out against the inclined-plane of portion (61) above with the right side to be in contact, the upper end of left wedge block (52) and right wedge block (51) is each provided with a spring
(521,511), the middle part between left grip block (42) and right grip block (41) are provided with one and extend downward and through shell
The top plate (80) to determine workpiece up and down direction position that the lifting screw (83) of middle part boss is fixedly connected, lifting screw
(83) the axial elongated slot (86) of setting one and anti-rotation teeth portion (85) phase wedging, the lower part of lifting screw (83) is provided with a nut
(84), the worm gear (81) in nut (84) and the Worm Wheel System being made of worm gear (81) and worm shaft (82) is fixed into one
The front-rear side walls of shell (31) are installed and are erected to body, worm shaft (82) front-rear direction, and clamp bracket (60) includes that a left side holds out against portion
(62), the right side holds out against portion (61) and a connection left side and holds out against portion (62) and the right side and hold out against the pushing part (63) of portion (61), in pushing part (63)
Portion is provided with the screw hole that the lines of push rod (90) front that one jacks motor (9) with clamping mutually screws, the front of shell (31)
A clutch (91) and a driving pulley (921), driving pulley are provided on push rod (90) between inner wall and pushing part (63)
(921) it is connect with the drive pulley (922) being mounted on worm shaft (82) by lifting and driving band (92), left grip block (42)
Top is additionally provided with the through-hole of a centering component for installing front-rear direction centering, and centering component includes that shape is L-shaped
Fore-stock and after-poppet, fore-stock include columned preceding guide part (71) and front clamp portion (711), the end of preceding guide part (71)
A back bevel (715) are arranged in portion, and there are two the rollings in clamping with face contact on front side of workpiece for the inside setting of front clamp portion (711)
It takes turns (730), annulus (714), preceding annulus (714) and left folder before preceding guide part (71) are provided with one at back bevel (715)
It holds and a front stretching spring (713) is installed between the through-hole on block (42), preceding guide part (71) is arranged at front clamp portion (711)
There are the feather key (712) of one with the sliding cooperation of through-hole front axial direction straight trough (422) on left grip block (42), after-poppet includes circle
A front bevel (725) are arranged in the end of guide part (72) and rear clamping part (721) after columnar, rear guide part (72), rear to clamp
The inside setting in portion (721) is close in rear guide part (72) there are two the idler wheel (730) in clamping with face contact on front side of workpiece
Annulus (724) after being provided with one at front bevel (725) installs one between the through-hole on rear annulus (724) and left grip block (42)
Adjustable spring (723) afterwards, rear guide part (72) are provided with one and the through-hole on left grip block (42) at rear clamping part (721)
The feather key (722) of the sliding cooperation of rear portion axial direction straight trough (424), is equipped with one between front bevel (725) and back bevel (715)
Ejector pin (70) in the slope is arranged in two sides, and ejector pin (70) right end stretches out the work department of left grip block, and left end is provided with a centering bullet
Spring (73), when left grip block (42) and right grip block (41) is relatively close and when clamping workpiece, workpiece is first contacted with ejector pin (70),
During gradually clamping, ejector pin (70) is headed into left grip block (42), meanwhile, preceding guide part (71) and rear guide part
(72) make front clamp portion (711) and rear clamping part under the action of front stretching spring (713) and rear adjustable spring (723) respectively
(721) move inward and realize centering positioning before and after workpiece, be provided with silencing means (901) in clamping jacking motor (9).
2. a kind of clamp assembly of clamping square cross according to claim 1, it is characterised in that: in the clamp assembly
(3) right is equipped with conveyer belt with the chute feeder (2) for conveying completion of processing workpiece, clamp assembly (3) left side setting
There are storagetank (10), is located at the sub-material pushing meanss (11) being equipped with above the storagetank (10) for pushing workpiece, workpiece exists
It is processed on vertical numerical control milling machine after positioning clamping in the clamp assembly (3), by the chute feeder (2) after completion of processing
Workpiece is seen off to required next website.
3. a kind of clamp assembly of clamping square cross according to claim 1, it is characterised in that: the clamping jacking electricity
When machine (9) drives the pushing part (63) to move inward, the left wedge block (52) and right wedge block (51) are moved up, from
And push the left grip block (42) and right grip block (41) is relatively close and clamping workpiece, when the clamping jacks motor (9)
When the pushing part (63) being driven to move outward, the left wedge block (52) and right wedge block (51) are in the spring (521)
It is moved down under the action of spring (511), meanwhile, the left grip block (42) and the right grip block (41) are respectively described
It is opposite under the action of left spring (421) and the right spring (411) to deviate from and unclamp workpiece.
4. a kind of clamp assembly of clamping square cross according to claim 1, it is characterised in that: when the clutch
(91) it when being engaged with driving pulley (921), pushes the worm shaft (82) to rotate by lifting and driving band (92), then drives institute
Worm gear (81) rotation is stated, the lifting screw (83) generates the movement of lifting and workpiece is made to realize positioning in above-below direction.
5. a kind of clamp assembly of clamping square cross according to claim 1, it is characterised in that: the silencing means
(901) it is set on the outside of clamping jacking motor (9), silencing cotton, the silencing cotton is filled in the silencing means (901)
The noise generated for absorbing clamping jacking motor (9) work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710121734.9A CN106903520B (en) | 2017-03-02 | 2017-03-02 | A kind of clamp assembly of clamping square cross |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710121734.9A CN106903520B (en) | 2017-03-02 | 2017-03-02 | A kind of clamp assembly of clamping square cross |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106903520A CN106903520A (en) | 2017-06-30 |
| CN106903520B true CN106903520B (en) | 2018-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710121734.9A Active CN106903520B (en) | 2017-03-02 | 2017-03-02 | A kind of clamp assembly of clamping square cross |
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| CN107627405A (en) * | 2017-09-20 | 2018-01-26 | 俞灿 | A kind of environment-friendly sheet equipment |
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| CN106903520A (en) | 2017-06-30 |
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