CN209157215U - Boring equipment is used in a kind of processing of pipe fitting - Google Patents
Boring equipment is used in a kind of processing of pipe fitting Download PDFInfo
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- CN209157215U CN209157215U CN201822154635.3U CN201822154635U CN209157215U CN 209157215 U CN209157215 U CN 209157215U CN 201822154635 U CN201822154635 U CN 201822154635U CN 209157215 U CN209157215 U CN 209157215U
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- pipe fitting
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- boring equipment
- fitting processing
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Abstract
The utility model relates to a kind of pipe fitting processing boring equipments, including be set side by side and can on, several heads of lower lifting and it is arranged below head and positioning component on the other side, and holding down assembly between two neighboring head is set, the lower rotation of head is connected with knife bar, positioning component includes locating piece, locating slot is provided on the locating piece at both ends, the opposite V-type positioning plate that is open is provided in two locating slots, one of V-type positioning plate can be mobile towards or away from the direction of another V-type positioning plate, it holds down assembly including the cushion block being located along the same line with locating piece, and it is arranged on rear side of cushion block and can be towards the pressing plate that cushion block direction rotates.The utility model can disposably carry out porous bore hole operation, and guarantee the accuracy positioned during bore hole, improve the efficiency and quality of bore hole.
Description
Technical field
The utility model belongs to mechanical pipe fitting processing technique field, and in particular to boring equipment is used in a kind of processing of pipe fitting.
Background technique
In some mechanical equipment, the use of square tube is seen everywhere.In elevator, it is used to support the support arm of lifting platform
As rhs-structure, both ends and centre are required to connect by the way of hinged, and hinged for convenience, need putting pipe
Both ends and middle position welding on the axle sleeve of articulated shaft is installed, and certain change can be generated in the process of welding in axle sleeve
Shape needs to carry out after the completion of welding to carry out bore hole to it to guarantee the rounding of its inner hole.And in traditional Boring
In technique, generally single-piece is carried out, and using manually being calibrated, calibration process is more troublesome, and calibration accuracy is low, not only
The quality of finished product is influenced, and reduces working efficiency.
Utility model content
The purpose of the utility model is to provide a kind of pipe fitting processing boring equipments, to solve asking for pipe fitting bore hole low efficiency
Topic.
A kind of pipe fitting processing of the utility model is achieved in that with boring equipment
A kind of pipe fitting processing boring equipment, exists including several heads that is set side by side and can go up and down above and below and setting
Head lower section and positioning component on the other side, and holding down assembly between two neighboring head is set, the head
Lower rotation is connected with knife bar, and the positioning component includes locating piece, is provided with locating slot on the locating piece at both ends, and two
The opposite V-type positioning plate that is open is provided in the locating slot, one of V-type positioning plate can be towards or away from another V
The direction of type positioning plate is mobile, described to hold down assembly including the cushion block being located along the same line with the locating piece, and setting
On rear side of cushion block and the pressing plate that can be rotated towards the cushion block direction.
Further, the head and positioning component respectively include three, and two groups of compression groups are provided between adjacent mechanism
Part, and every group of head setting to hold down assembly respectively close to its direction.
Further, further include rack and the table top for being arranged on the rack top, the positioning component and hold down assembly point
It She Zhi not be on table top.
Further, the head passes through head column respectively and is fixed on table top, the front side setting of the head column
There is the ball-screw of vertical direction, the head is mounted on ball-screw；
Servo motor is connected at the top of the ball-screw.
Further, motor is provided on front side of the head, the motor passes through the transmission mechanism and knife inside head
Bar transmission connection.
Further, one of V-type positioning plate, which is fixed on, is arranged where it in locating slot, another V-type positioning plate
Outer end be connected with cylinder I.
Further, the center of the locating piece and locating slot is arranged and corresponding through-hole above and below knife bar, the through-hole
It is communicated across table top with the iron filings case being arranged in rack.
Further, opposite rectangular location hole is provided between the locating piece and the table top.
Further, the tailstock for holding down assembly including oil cylinder and being hinged on the oil cylinder rear end, the pressing plate
Rear side is hinged on the telescopic end of the oil cylinder using hinge, and bottom is hinged on a pressed seat, and the pressed seat is arranged in cushion block
Rear side.
Further, conveying roller is provided on the table top, the conveying roller and positioning component are located at same straight line
On；
The conveying roller is rotatably arranged in roller mount, is provided with the fixation being mounted on table top below the roller mount
Plate, cylinder II is provided with below the fixed plate, and the telescopic end of the cylinder II passes through fixed plate and is connected with roller mount.
After above-mentioned technical proposal, the utility model is had the beneficial effect that
(1) the utility model can be stuck in due to being provided with V-type positioning plate in positioning component at pipe fitting both ends
On axle sleeve, the precise positioning of pipe fitting is realized, guarantee the quality of bore hole effect and finished product；
(2) the utility model can carry out precise positioning by positioning component pipe fitting, and be realized automatically by holding down assembly
It is fixed, and drive knife bar to realize the bore hole of multiple axle sleeves on pipe fitting using multiple heads, guarantee the quality of bore hole, improves work effect
Rate.
Detailed description of the invention
The present invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the structure chart of the pipe fitting processing boring equipment of the preferred embodiment in the utility model；
Fig. 2 is the structure chart of the head section of the pipe fitting processing boring equipment of the preferred embodiment in the utility model；
Fig. 3 is the knot of the positioning component of wherein one end of the pipe fitting processing boring equipment of the preferred embodiment in the utility model
Composition；
Fig. 4 is the structure of the other end positioning component of the pipe fitting processing boring equipment of the preferred embodiment in the utility model
Figure；
Fig. 5 is the structure chart of the pipe fitting processing boring equipment of the preferred embodiment in the utility model to hold down assembly；
Fig. 6 is the structure chart of the conveying roller part of the pipe fitting processing boring equipment of the preferred embodiment in the utility model；
In figure: head 10, knife bar 11, head column 12, ball-screw 13, mounting plate 14, servo motor 15, servo motor
Fixed plate 16, linear guide 17, linear slider 18, motor 19, positioning component 20, locating piece 21, locating slot 22, V-type positioning plate
23, cylinder I 24, through-hole 25, rectangular location hole 26 holds down assembly 30, cushion block 31, pressing plate 32, oil cylinder 33, tailstock 34, hinge 35,
Pressed seat 36, pipe fitting 40, axle sleeve 41, rack 50, table top 51, iron filings case 52, conveying roller 53, roller mount 54, fixed plate 55, gas
Cylinder II 56, guide rod 57.
Specific embodiment
It is practical below in conjunction with this to keep the purposes, technical schemes and advantages of the utility model embodiment clearer
The technical solution in the utility model embodiment is clearly and completely described in attached drawing in novel embodiment, shows
So, described embodiment is a part of embodiment of the utility model, rather than whole embodiments.It is practical based on this
Embodiment in novel, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment is fallen within the protection scope of the utility model.
Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit below and is wanted
The scope of the utility model of protection is sought, but is merely representative of the selected embodiment of the utility model.Based on the utility model
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Mode is fallen within the protection scope of the utility model.
As shown in figures 1 to 6, a kind of pipe fitting processing boring equipment, including being set side by side and can go up and down above and below several
Head 10 and it is arranged below head 10 and positioning component on the other side 20, and is arranged between two neighboring head 10
Hold down assembly 30, the lower rotation of head 10 is connected with knife bar 11, and positioning component 20 includes locating piece 21, the positioning positioned at both ends
It is provided with locating slot 22 on block 21, the opposite V-type positioning plate 23 that is open is provided in two locating slots 22, one of V-type is fixed
Position plate 23 can be mobile towards or away from the direction of another V-type positioning plate 23, and holding down assembly 30 includes being located at locating piece 21
Cushion block 31 on same straight line, and the rear side of cushion block 31 is set and can be towards the pressing plate 32 that 31 direction of cushion block rotates.
The pipe fitting 40 that pipe fitting processing boring equipment is processed provided by the present embodiment by taking the support arm of elevator as an example,
The both ends and centre of the pipe fitting 40 are welded with axle sleeve 41, therefore in the present embodiment, in order to realize while to three axle sleeves 41
Bore hole is carried out, head 10 and positioning component 20 respectively include three, and two groups are provided between adjacent mechanism and holds down assembly 30, and is every
Group hold down assembly 30 respectively close to its direction head 10 be arranged.
The quantity of head 10 and position can be determined according to the quantity of 40 Upper shaft sleeve 41 of pipe fitting and position.
Head 10 and positioning component 20 are oppositely arranged, and are held down assembly 30 for fixing pipe fitting 40, are prevented in bore hole process
Middle generation is shaken, to cause the deviation of bore hole.
For convenience by the fixation and installation of head 10 and various components, boring equipment further includes rack 50 and is arranged in machine
The table top 51 of 50 upper top of frame, positioning component 20 and holding down assembly 30 are separately positioned on table top 51.
It needs that pipe fitting 50 is placed on positioning component 20 first before bore hole, head 10 is to pipe fitting 50 in order to prevent
Movement impacts, and the position of head 10 need to be higher compared to the height of its position during bore hole at this time, because, in order to realize
The lifting of head 10, head 10 are fixed on table top 51 by head column 10 respectively, and the front side of head column 12 is provided with perpendicular
Histogram to ball-screw 13, head 10 is mounted on ball-screw 13.
The rear side of head 10 is provided with mounting plate 14, and the trailing flank of mounting plate 14 is fixed on the ball nut of ball-screw 13
On, when ball-screw 13 rotates, ball nut can drive head 10 to move up and down by mounting plate 14.
In order to increase the degree of automation and precision of the adjustment of about 10 head, the top of ball-screw 13, which is connected with, to be watched
Take motor 15.
It can be rotated, and the angle of rotation can be carried out accurate with automatic traction ball-screw 13 by servo motor 15
Setting, to increase the precision of bore hole and the quality of finished product.
Preferably, servo motor 15 is mounted on front side of the top of head column 12 by servo motor fixed plate 16.
Preferably, servo motor 15 can use but be not limited only to the servo motor of model MSMF202L1C6.
Preferably, in order to prevent the generating deviation when moving up and down of head 10 and influence the effect of bore hole, ball-screw 13
Two sides be provided with the linear guide 17 parallel with ball-screw 13, the rear side of head 10 is slidably arranged in linear guide 17.
The rear side both ends of mounting plate 14 are respectively arranged with linear slider 18, and linear slider 18 is slidably arranged in linear guide 17
On, servo motor 15 drives ball-screw 13 to rotate, and ball nut then drives head 10 to carry out moving up and down in linear guide 17
It is dynamic.
The setting of head 10 is for driving knife bar 11 to rotate, to be rotated into row boring in axle sleeve 41 using knife bar 11
Hole, and in order to realize the rotation of knife bar 11, the front side of head 10 is provided with motor 19, and motor 19 passes through the transmission inside head 10
Mechanism and knife bar 11 are sequentially connected.
Preferably, motor 19 can be selected but be not limited only to the asynchronous machine of model D090.
In order to realize the precise positioning of pipe fitting 40, one of V-type positioning plate 23, which is fixed on, is arranged where it locating slot
In 22, the outer end of another V-type positioning plate 23 is connected with cylinder I 24.
After pipe fitting 40 is moved on positioning component 20, cylinder I 24 pushes coupled V-type positioning plate 23 to another
23 direction of V-type positioning plate is mobile, so that V-type positioning plate 23 to be caught in the both ends of pipe fitting 40, and by the axis at 40 both ends of pipe fitting
Set 41 is stuck in V-type positioning plate 23 is open, to realize the precise positioning to pipe fitting 40.
Preferably, cylinder I 24 can be selected but be not limited only to the plunger type cylinder of model TN32*175.
To axle sleeve 41 inner hole carry out bore hole when, a large amount of iron filings can be generated, in order to prevent iron filings it is random trickle down and
Working environment, the center setting of locating piece 21 and locating slot 22 through-hole 25 corresponding with about 11 knife bar are influenced, through-hole 25 is worn
Table top 51 is crossed to communicate with the iron filings case 52 being arranged in rack 50.
Knife bar is protruded into from the upper end of axle sleeve 41 carries out boring work in axle sleeve 41, iron filings can fall into rack by through-hole 25
In iron filings case 52 inside 50.
The rear side of iron filings case 52 is provided with cooling water tank, the setting of cooling water tank be for head 10 knife bar 11 provide it is cold
But water is used, avoids temperature during bore hole of knife bar 11 excessively high, extends the service life of knife bar 11.
In order to guarantee the precise positioning of positioning component 20, and prevent during bore hole generate movement, locating piece 21 with
Opposite rectangular location hole 26 is provided between table top 51.
During bore hole, square key is inserted into rectangular location hole 26, the upper and lower ends of square key are stuck in locating piece
21 in the rectangular location hole 26 of table top 51, to prevent each locating piece 21 from relatively moving, it is ensured that its accuracy positioned.
The setting of pressing plate 32 is to prevent it from generating movement, in order to realize pressing plate for fixing pipe fitting 40 in bore hole
32 rotation, holding down assembly 30 includes oil cylinder 33 and is hinged on the tailstock 34 of 33 rear end of oil cylinder, and the rear side of pressing plate 32 utilizes hinge
Chain 35 is hinged on the telescopic end of oil cylinder 33, and bottom is hinged on a pressed seat 36, and the rear side of cushion block 31 is arranged in pressed seat 36.
Direction where the piston rod of oil cylinder 33 towards cushion block 31, when needing to compress pipe fitting 40, oil cylinder 33
Piston rod stretches out, and pushes pressing plate 32 to rotate forward on pressed seat 36, to be pressed on the top of pipe fitting 40.
In order to guarantee that the stability of compaction process, the height of pressed seat 36 are higher than the height of cushion block 31, can make to press in this way
Plate 32 is horizontally oriented when compressing pipe fitting 40, so that the contact area between pressing plate 32 and pipe fitting 40 is kept maximum, to protect
Demonstrate,prove the stability compressed.
Preferably, oil cylinder 33 can be selected but be not limited only to model MOB-CA monaural type hydraulic cylinder.
In order to realize back and forth conveying of the pipe fitting 40 on table top 51, conveying roller 53, conveying roller are provided on table top 51
53 are located along the same line with positioning component 20.
During pipe fitting conveying, on the conveying roller 53 placed, it is possible to reduce the difficulty of transmission process.
Preferably, the side of conveying roller 53 can connect feeder motor, so that the automatic rotation of conveying roller 53 is driven,
Increase its intelligence degree.
For the ease of the conveying and positioning of pipe fitting 40, the height of conveying roller 53 be it is adjustable, it is in the present embodiment, defeated
It send idler wheel 53 to be rotatably arranged in roller mount 54, the fixed plate 55 being mounted on table top, fixed plate is provided with below roller mount 54
55 lower section is provided with cylinder II 56, and the telescopic end of cylinder II 56 passes through fixed plate 55 and is connected with roller mount 54.
When pipe fitting 40 is delivered on boring equipment or is transferred out from boring equipment, cushion block 31 in order to prevent
The movement of pipe fitting 40 is caused to stop with positioning component 20, the piston rod of cylinder II 56 stretches out, pushing rolling wheels seat 54 and conveying
Idler wheel 53 increases, to realize the smooth movement of pipe fitting 40.
During pipe fitting 40 carries out bore hole, on the cushion block 31 and positioning component 20 that need to place pipe fitting 40, at this time
The piston rod of cylinder II 53 bounces back, and drives roller mount 54 and conveying roller 53 to decline, so that pipe fitting 40 is fallen in 31 He of cushion block
On positioning component 20.
Preferably, conveying roller 53 generates offset, the bottom both ends of roller mount 54 during oscilaltion in order to prevent
It is provided with guide rod 57, the lower end of guide rod 57 is moveed downward across fixed plate 55.
During cylinder II 56 drives roller mount 54 and conveying roller 53 to move up and down, guide rod 57 can pass through solid
Fixed board 55 moves up and down.
Preferably, cylinder II 56 can be selected but be not limited only to the cylinder of model SDA60*5050.
When bore hole operation, pipe fitting 40 is never installed to the position of cylinder I 24 using conveying roller 53 to I 24 place side of cylinder
To movement, when the end movement far from cylinder I 24 is more than the V-type positioning plate 23 at the end, then stop moving, then conveying roller
53 height decline, and pipe fitting 40 is placed on locating piece 21 and cushion block 21, and the piston rod of cylinder I 24 stretches out, by coupled V
Type positioning plate 23 is stuck on the axle sleeve 41 of 40 end of pipe fitting, and pushes pipe fitting 40 to the direction of another V-type positioning plate 23, is made another
One V-type positioning plate 23 is stuck on the axle sleeve 41 of 40 other end of pipe fitting, and the piston rod of oil cylinder 33 stretches out at this time, and pressing plate 32 is pushed to press
Tightly in the top of pipe fitting 40, servo motor 15 is rotated at this time, and ball-screw 13 drives head 10 to decline, and knife bar 11 is protruded into axle sleeve
In 41 hole, the motor 19 on head 10 drives knife bar rotation, carries out boring work.
Bore hole completes axis, the piston rod retraction of cylinder I 24, by coupled V-type positioning plate 23 from the end of pipe fitting 40
It takes out, rotates backward conveying roller 53, the V-type positioning plate 23 of the pipe fitting other end is separated with pipe fitting 40, then conveying roller 53
It increases, and faces away from the direction rotation of cylinder I 24, pipe fitting 40 is transferred out.
It is enlightenment, through the above description, related work people with the above-mentioned desirable embodiment according to the utility model
Member can carry out various changes and amendments in the range of without departing from this item utility model technical idea completely.This item is real
It is not limited to the contents of the specification with novel technical scope, it is necessary to its technology is determined according to scope of the claims
Property range.
In the description of the present invention, it should be understood that indicating position or the term of positional relationship are based on attached drawing
Shown in orientation or positional relationship, be merely for convenience of describing the present invention and simplifying the description, rather than indication or suggestion institute
The equipment or element of finger must have a particular orientation, is constructed and operated in a specific orientation, therefore should not be understood as to this reality
With novel limitation.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside element.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
In addition, the terms such as term "horizontal", "vertical", " pendency " are not offered as requiring component abswolute level or pendency, and
It is that can be slightly tilted.It is not to indicate the structure if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical"
It has to fully horizontally, but can be slightly tilted.
In the present invention unless specifically defined or limited otherwise, fisrt feature is on or below second feature
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature is on second feature, top and above include fisrt feature the
Right above two features and oblique upper, or first feature horizontal height is merely representative of higher than second feature.Fisrt feature is in the second spy
Under sign, lower section and fisrt feature included below be directly below and diagonally below the second feature, or be merely representative of fisrt feature level
Height is less than second feature.
Claims (10)
1. a kind of pipe fitting processing boring equipment, which is characterized in that including several heads that is set side by side and can go up and down above and below
(10) and setting is below the head (10) and positioning component on the other side (20), and setting two neighboring head (10) it
Between hold down assembly (30), the lower rotation of the head (10) is connected with knife bar (11), and the positioning component (20) includes fixed
Position block (21), is provided with locating slot (22) on the locating piece (21) at both ends, is provided with out in two locating slots (22)
The opposite V-type positioning plate (23) of mouth, one of V-type positioning plate (23) can be towards or away from another V-type positioning plate (23)
Direction it is mobile, hold down assembly (30) include the cushion block (31) being located along the same line with the locating piece (21), and
It is arranged on rear side of the cushion block (31) and can be towards the pressing plate (32) that the cushion block direction rotates.
2. pipe fitting processing boring equipment according to claim 1, which is characterized in that the head (10) and positioning component
(20) three are respectively included, two groups are provided between adjacent mechanism and is held down assembly (30), and every group hold down assembly (30) lean on respectively
Head (10) setting of its nearly direction.
3. pipe fitting processing boring equipment according to claim 1, which is characterized in that further include that rack (50) and setting exist
The table top (51) of rack (50) upper top, the positioning component (20) and hold down assembly (30) be separately positioned on table top (51).
4. pipe fitting processing boring equipment according to claim 3, which is characterized in that the head (10) passes through machine respectively
Head column (12) is fixed on table top (51), and the ball-screw of vertical direction is provided on front side of the head column (12)
(13), the head (10) is mounted on ball-screw (13)；
Servo motor (15) are connected at the top of the ball-screw (13).
5. pipe fitting processing boring equipment according to claim 1 or 4, which is characterized in that the front side of the head (10)
It is provided with motor (19), the motor (19) is sequentially connected by the transmission mechanism inside head with knife bar (11).
6. pipe fitting processing boring equipment according to claim 1, which is characterized in that one of V-type positioning plate (23)
It is fixed on and is arranged where it in locating slot (22), the outer end of another V-type positioning plate (23) is connected with cylinder I (24).
7. pipe fitting processing boring equipment according to claim 3, which is characterized in that the locating piece (21) and locating slot
(22) corresponding through-hole (25), the through-hole (25) pass through table top (51) and exist with setting up and down with knife bar (11) for center setting
Iron filings case (52) in rack (50) communicates.
8. pipe fitting processing boring equipment according to claim 3, which is characterized in that the locating piece (21) and described
Opposite rectangular location hole (26) is provided between face (51).
9. pipe fitting processing boring equipment according to claim 1, which is characterized in that described hold down assembly (30) include oil
The rear side of cylinder (33) and the tailstock (34) for being hinged on the oil cylinder (33) rear end, the pressing plate (32) is hinged using hinge (35)
Telescopic end in the oil cylinder (33), bottom are hinged on a pressed seat (36), and the pressed seat (36) is arranged in cushion block (31)
Rear side.
10. pipe fitting processing boring equipment according to claim 3, which is characterized in that be provided on the table top (51)
Conveying roller (53), the conveying roller (53) are located along the same line with positioning component (20)；
The conveying roller (53) is rotatably arranged on roller mount (54), is provided with below the roller mount (54) and is mounted on table top
(51) fixed plate (55) on, is provided with cylinder II (56) below the fixed plate (55), the cylinder II (56) it is flexible
End is connected across fixed plate (55) with roller mount (54).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822154635.3U CN209157215U (en) | 2018-12-20 | 2018-12-20 | Boring equipment is used in a kind of processing of pipe fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822154635.3U CN209157215U (en) | 2018-12-20 | 2018-12-20 | Boring equipment is used in a kind of processing of pipe fitting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209157215U true CN209157215U (en) | 2019-07-26 |
Family
ID=67344485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822154635.3U Active CN209157215U (en) | 2018-12-20 | 2018-12-20 | Boring equipment is used in a kind of processing of pipe fitting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209157215U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110774362A (en) * | 2019-10-25 | 2020-02-11 | 北京五木家具有限公司 | Double-end type hinge puncher |
| CN112247178A (en) * | 2020-09-21 | 2021-01-22 | 贵州新安航空机械有限责任公司 | Automatic drilling equipment |
-
2018
- 2018-12-20 CN CN201822154635.3U patent/CN209157215U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110774362A (en) * | 2019-10-25 | 2020-02-11 | 北京五木家具有限公司 | Double-end type hinge puncher |
| CN110774362B (en) * | 2019-10-25 | 2021-11-09 | 北京五木家具有限公司 | Double-end type hinge puncher |
| CN112247178A (en) * | 2020-09-21 | 2021-01-22 | 贵州新安航空机械有限责任公司 | Automatic drilling equipment |
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