CN109604886A - A kind of needle roller grinds the welder of limit sleeve in positioning disk - Google Patents
A kind of needle roller grinds the welder of limit sleeve in positioning disk Download PDFInfo
- Publication number
- CN109604886A CN109604886A CN201811380906.5A CN201811380906A CN109604886A CN 109604886 A CN109604886 A CN 109604886A CN 201811380906 A CN201811380906 A CN 201811380906A CN 109604886 A CN109604886 A CN 109604886A
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- China
- Prior art keywords
- positioning disk
- limit sleeve
- grinding
- disk
- bottom plate
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Classifications
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- 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
- B23K37/02—Carriages for supporting the welding or cutting element
- B23K37/0252—Steering means
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The invention discloses the welder of limit sleeve in a kind of needle roller grinding positioning disk, the clutch disk including rotating setting on bottom plate is connected with positioning disk at the top of clutch disk；Bottom plate is equipped with the first driving motor for being drivingly connected disk rotational, is circumferentially on bottom plate along clutch disk and grinds mechanism and welding mechanism；It grinds mechanism and is equipped with grinding rod, the bistrique end of grinding rod sticks on positioning disk upper surface, and corresponding for inserting the circular passage position that each mounting hole of limit sleeve is surrounded on positioning disk；After the welding position end on positioning disk is ground by grinding mechanism, limit sleeve is successively inserted in the mounting hole on positioning disk, the position of welding gun is adjusted, each limit sleeve is welded and fixed.All limit sleeves on positioning disk are carried out disposable rotating welding using automatic welding mode, welding efficiency is fast, and weld strength is high by the welder of limit sleeve in a kind of needle roller grinding positioning disk provided by the invention.
Description
Technical field
The present invention relates to welding fields, and specifically a kind of needle roller grinds the welder of limit sleeve in positioning disk.
Background technique
During the processing and manufacturing of needle roller, a procedure is to carry out corresponding milled processed to the both ends of needle roller.It is existing
Have in technology, when grinding simultaneously to needle roller both ends, needs to use a round positioning disk, as shown in Figure 1, including one
Disc body is uniformly equipped with several mounting holes 100.1 in its circumferential edge, and limit sleeve 110 is equipped in mounting hole 100.1,
Specifically, the form that each limit sleeve 110 is all made of welding with positioning disk is fixed.In the prior art, usually artificial right one by one
Limit sleeve 110 is welded with positioning disk, that is, is just welded after inserting a limit sleeve 110 in this way, welding efficiency
It is low, and since limit sleeve 110 and 100.1 surrounding of mounting hole are not used to form the space of weld seam, after welding, weld seam can be abnormal
It is prominent, also, weld strength is inadequate.
The content of present invention
The technical problems to be solved by the present invention are: the welder of limit sleeve in a kind of needle roller grinding positioning disk is provided,
Disposable rotating welding is carried out to all limit sleeves on positioning disk using automatic welding mode, welding efficiency is fast, and weld seam is strong
Degree is high.
The technical solution used in the present invention is: providing the welder of limit sleeve in a kind of needle roller grinding positioning disk, packet
The installation frame being made of bottom plate and four support footing is included, rotation is equipped with clutch disk, the top of clutch disk on the bottom plate
Portion is removable to be equipped with positioning disk to be welded；Bottom is equipped with the first driving motor for being drivingly connected disk rotational, the bottom
Grinding mechanism and welding mechanism are circumferentially with along clutch disk on plate；
Grind it is removable in mechanism be equipped with grinding rod, the bistrique end of the grinding rod sticks on positioning disk upper surface, and with
The circular passage position that each mounting hole on positioning disk for inserting limit sleeve is surrounded is corresponding, the bistrique of the grinding rod
Diameter be greater than mounting hole diameter；
Welding mechanism includes fixed link and welding gun, and the welding gun is removable to be located in fixed link, and welding gun is close to fixed
One end of bar can adjust position with any angle, when grinding mechanism is to position corresponding with welding on two end faces on positioning disk
After grinding, limit sleeve is successively inserted in the mounting hole on positioning disk, adjusts the position of welding gun, the first driving motor is drivingly connected
Disk rotational starts welding gun, for each limit sleeve to be welded and fixed so that positioning disk be driven to rotate.
Control cabinet is additionally provided on the bottom plate, the control cabinet is electrically connected with the first driving motor, welding gun.
Compared with the prior art, the present invention has the following advantages: welder of the invention, including grinding mechanism and welding
Mechanism, and also there is the clutch disk of rotation setting, for connecting positioning disk, before welding, pass through grinding mechanism first
On grinding rod ground to the corresponding position in circular passage is formed by positioning disk with all mounting holes, formed corresponding
Annular groove, in such structure, after limit sleeve is inserted into mounting hole, the side wall of limit sleeve and positioning disk upper installing hole side
Welding space is formed between wall can be with the formation of more convenient weld seam that is, after welding, and the intensity of weld seam is higher.Specifically
When welding, do not need one by one to weld limit sleeve, but after all limit sleeves are inserted into corresponding mounting hole, starting
Welding mechanism, rotation connection disk drive positioning disk to rotate simultaneously, i.e., clutch disk rotates one week, realize all limit sleeves and determine
The welding of position disk, specifically, it is only necessary to which the welding of all limit sleeves, efficiency can be realized in the welding for carrying out twice circular weld
It is high.
Further, the grinding mechanism includes support rod, and the support rod is equipped with limiting section, the support rod
On be arranged with installation casing, integrally formed with mounting plate on the installation sleeve side walls, the upper surface of the mounting plate is equipped with edge
Second driving motor of vertical direction setting, the grinding rod are detachably connected on the output shaft of the second driving motor；Installation
The top of casing is equipped with tight loop, and tight loop is set in outside support rod；It is additionally provided with spring between tight loop and installation casing,
One end of spring acts against the bottom surface of tight loop, and the other end acts against the top of installation casing, and spring is set in first
On strut.
Preferably, be provided along its length the first kidney slot on the mounting plate, second driving motor it is defeated
Shaft is threaded through in the first kidney slot.The setting of first waist-shaped hole allows the position of the second driving motor along mounting plate
Length direction be adjusted correspondingly, to guarantee that grinding rod accurate position on positioning disk carries out attrition process.
As an improvement, be radially equipped with the open slot of upper and lower end face connection on the tight loop, the open slot and tight
Admittedly enclosing inner hole connection, and extend to other end side wall；It is equipped with fastening bolt close to the open side of open slot on the tight loop, when
When tight loop is set on support rod, fastening bolt is tightened, is clamped for connecting open slot two sides.
It improves again, the output shaft of the first driving motor, which turns downward, to be threaded through on bottom plate, and the lower end of output shaft is connected with
Drive pulley；The bottom surface of the clutch disk center is equipped with shaft, and the lower end of shaft is rotatably located at by bearing
On bottom plate, and the lower end of shaft is equipped with driven pulley, is connected between drive pulley and driven pulley by driving belt.
Improved again, the bottom surface of the bottom plate is equipped with adjustable plate close to driving belt position, and described adjustable plate one end is set
Have the second waist-shaped hole, be equipped with attachment screw in the second waist-shaped hole, for adjustable plate to be connected to bottom plate, adjustable plate it is another
End is equipped with locating piece, and locating piece is equipped with through-hole, and driving belt is movable to be worn in through-holes；The position of adjustable plate is adjusted, is used
In the elasticity for adjusting driving belt.
Detailed description of the invention
Fig. 1 is the positioning disk structural schematic diagram of the prior art.
Fig. 2 is the structural schematic diagram of the welder of limit sleeve in a kind of needle roller grinding positioning disk of the invention.
Fig. 3 is that another angle of the welder of limit sleeve in a kind of needle roller grinding positioning disk of the invention is partially schematic
Figure.(removal part)
Fig. 4 is amplification assumption diagram at X in Fig. 3.
Fig. 5 is the partial sectional view of the welder of limit sleeve in a kind of needle roller grinding positioning disk in the present invention.
Fig. 6 is the structural schematic diagram that mechanism is ground in the present invention.
Fig. 7 is the structural schematic diagram of the tight loop in the present invention.
Fig. 8 is the structural schematic diagram of the installation casing and mounting plate in the present invention.
Fig. 9 is the structural schematic diagram after the positioning disk welding in the embodiment of the present invention.
Wherein, 1- bottom plate, 2- support footing, 3- clutch disk, the first driving motor of 4-, 5- grinding rod, 6- fixed link,
7- welding gun, 8- control cabinet, 9- support rod, 10- limiting section, 11- install casing, 12- mounting plate, the first waist-shaped hole of 12.1-, 13-
Second driving motor, 14- tight loop, 14.1- open slot, 15- spring, 16- fastening bolt, 17- drive pulley, 18- turn
Axis, 19- bearing, 20- driven pulley, 21- driving belt, 22- adjustable plate, the second waist-shaped hole of 22.1-, 23- attachment screw,
24- locating piece, 25- spanner；
100- positioning disk, 100.1- mounting hole, 110- limit sleeve, the first weld seam of 120-, the second weld seam of 13-.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and specific embodiments.
In the description of the present invention, it should be noted that term " top ", " upper surface ", " bottom surface ", " centre bit
Set ", the orientation or positional relationship of the instructions such as " lower end " be to be based on the orientation or positional relationship shown in the drawings, be merely for convenience of retouching
It states the present invention and simplifies description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific
Orientation construction and operation, therefore be not considered as limiting the invention.In addition, term " first ", " second " are only used for retouching
Purpose is stated, in order to mutually distinguish, is not understood to indicate or imply relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " connection " " is matched
Dress " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be machine
Tool connection, is also possible to be electrically connected；It can be directly connected, two members can also be can be indirectly connected through an intermediary
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in the present invention with concrete condition
Concrete meaning.
As shown in Fig. 2~8, the welder of limit sleeve in a kind of needle roller grinding positioning disk provided by the invention, including peace
Installation frame, the specific installation frame is made of a bottom plate 1 and four support footing 2, and four support footing 2 are respectively set
In the position at four angles of 1 lower surface of bottom plate, specifically, four support footing 2 can be welded with bottom plate 1, can also be spirally connected or
Person's inserting mode is fixed.
Rotation is equipped with clutch disk 3 on bottom plate 1, and the top of clutch disk 3 is removable to be equipped with positioning disk 100 to be welded；
Bottom plate 1 is equipped with the first driving motor 4 for being drivingly connected the rotation of disk 3.Specifically, the output shaft of the first driving motor 4
It turns downward and is threaded through on bottom plate 1, and the lower end of output shaft is connected with drive pulley 17.Under 3 center of clutch disk
Bottom surface is equipped with shaft 18, and the lower end of shaft 18 is rotatably located on bottom plate 1 by bearing 19, more specifically, as shown in fig. 6,
It is equipped with a through-hole on bottom plate 1, bearing block 25 is set in through-hole, is set in bearing block 25 there are two bearing 19, is turned along the vertical direction
The lower end of axis 18 is threaded through in two bearings 19.And driven pulley 20, drive pulley 17 are equipped in the lower end of shaft 18
It is connect between driven pulley 20 by driving belt 21.
In actual use, in order to facilitate the adjusting of 21 tightness of driving belt, in the close biography of the bottom surface of bottom plate 1
Dynamic 21 position of belt is arranged an adjustable plate 22, and 22 one end of adjustable plate is equipped with the second waist-shaped hole 22.1, in 22.1 hole of the second waist type
It is equipped with attachment screw 23, for adjustable plate 22 to be connected to bottom plate 1.The setting of second waist-shaped hole 22.1 is for convenient adjustment
The position of adjustable plate 22, as long as unclamping attachment screw 23, i.e., removable 22 position of adjustable plate is adjusted to required driving belt 22
When tightness, attachment screw 23 is tightened.
In the present embodiment, grinding mechanism and welding mechanism are circumferentially with along clutch disk 3 on bottom plate 1.
Specifically, removable in grinding mechanism be equipped with grinding rod 5, the bistrique end of grinding rod 5 sticks on table on positioning disk 100
Face, and it is opposite for inserting the circular passage position that each mounting hole 100.1 of limit sleeve 110 is surrounded on positioning disk 100
It answers, the diameter of the bistrique of grinding rod 5 is greater than the diameter of mounting hole 100.1.
Grinding mechanism includes support rod 9, and support rod 9 is equipped with limiting section 10.In the present embodiment, limiting section 10 is to support
A limit lantern ring being arranged on the side wall of bar 9, the limit lantern ring can be integrally formed with support rod 9, can also will be limited with the later period
Position lantern ring is sleeved on outside support rod 9, is then fixed by welding manner, or fixed by screw.
More specifically, it is arranged with installation casing 11 on support rod 9, installs on 11 side wall of casing integrally formed with mounting plate
12, the upper surface of mounting plate 12 is equipped with the second driving motor 13 being arranged along the vertical direction, and grinding rod 5 is detachably connected to second
On the output shaft of driving motor 13.In the present embodiment, in order to the position of grinding rod 5 can be more accurate adjustment, in mounting plate
The first kidney slot 12.1 is provided along its length on 12, the output shaft of the second driving motor 13 is threaded through the first kidney slot 12.1
In, so in actual use, the position of grinding rod 5 can be along the length direction radiai adjustment of mounting plate 12.
The top for installing casing 11 is equipped with tight loop 14, and tight loop 14 is set in outside support rod 9；Tight loop 14 and peace
Spring 15 is additionally provided between tubing 11, one end of spring 15 acts against the bottom surface of tight loop 14, and the other end acts against installation
The top of casing 11, and spring 15 is set in first support bar 8.
When grinding rod 5 start grinding when, that is, grind 54 bottom surfaces act against on positioning disk 100 with 100.1 position of mounting hole
To there are gaps between the bottom of installation casing 11 and limiting section top when corresponding to, as grinding rod 5 is constantly to 100 table of positioning disk
The attrition process in face, the surface of positioning disk 100 are ground out corresponding annular groove, under the stretch compensation effect of spring 53,
Grinding rod 5 bottom surface is remained to be fitted closely with 100 surface of positioning disk, improves grinding efficiency.
In the present embodiment, the bistrique that whens milled grooves selects is arc-shaped bistrique, and the diameter of bistrique is greater than mounting hole
100.1 diameter improves grinding efficiency.
In this structure, more specifically, the open slot 14.1 of upper and lower end face connection, opening are radially equipped on tight loop 14
Slot 14.1 is connected to tight loop inner hole, and extends to other end side wall, until extending to the general position of 14 sidewall width of tight loop
Set, guarantee tight loop 14 along inner hole can contractile motion while；Due intensity is made it have again.On tight loop 14
Open side close to open slot 14.1 is equipped with fastening bolt 16, in the present embodiment, in order to facilitate tightening and pine for fastening bolt 16
It opens, is equipped with spanner 25 in its outer end.When tight loop 14 is set on support rod 9, as long as rotating spanner 25 can be tightened tightly
Fixing bolt 16 is clamped for connecting 14.1 two sides of open slot.
Welding mechanism includes fixed link 6 and welding gun 7, and welding gun 7 is removable to be located in fixed link 6, and welding gun 7 is close to fixed link
6 one end can adjust position with any angle.Specifically, towering realization any angle is adjustable herein, it can be by using ten thousand
It connects, any angle can be rotated according to actual needs as connector is attached, or using hose.
After grinding mechanism on two end faces on positioning disk 100 with the grinding of corresponding position is welded, in positioning disk 100
On mounting hole 100.1 in successively insert limit sleeve 110, adjust the position of welding gun 7, the first driving motor 4 is drivingly connected disk
3 rotations start welding gun 7, for each limit sleeve 110 to be welded and fixed so that positioning disk 100 be driven to rotate.
In order to facilitate control, automation process is preferably realized, control cabinet 8, control cabinet 8 and are additionally provided on bottom plate 1
One driving motor 4, welding gun 7 are electrically connected.
Working principle: being uniformly preset with mounting hole 100.1 along its circumferencial direction on positioning disk 100 first, will position
Disk 100 is fixed on clutch disk 3 with any one end face direction, is adjusted the position of grinding rod 5, is made itself and mounting hole 100.1
Position is corresponding, by adjusting 14 position of tight loop 5 bistrique end face of grinding rod is acted against on 100 surface of positioning disk, this process
The bistrique used is arc-shaped bistrique；Grinding rod 5 is run, runs the first driving motor 4 at the same time, is rotated in grinding rod 5
Meanwhile positioning disk 100 realizes the grinding that circumference is carried out on 100 surface of positioning disk with clutch disk 3 together circular-rotation,
Form the groove of annular.After the completion of one end surface grinding, positioning disk 100 is dismantled, is converted direction, upward with another end face
It is repositioned on clutch disk 3, similarly carries out annular abrasion, form corresponding annular groove.
After the completion of two end faces are all ground, it is inserted into limit sleeve 110 one by one in mounting hole 100.1, due in advance fixed
Annular groove is ground in position disk 100, so having after limit sleeve 110 is inserted into mounting hole 100.1 in the circumferential direction of limit sleeve 110
Recess space increases the contact area of positioning disk 100 and limit sleeve 110, improves weld seam for facilitating the formation of welded seam
Intensity.
Also, due to the presence of clutch disk 3, there is good positioning action when inserting limit sleeve 110, as long as by each
The inserting of limit sleeve 110 adjusts the position of welding gun 7 after the completion of the inserting of each limit sleeve 110 to bottom, keeps its alignment each
A limit sleeve 110 starts welding gun 7, operation close to the side in 100 center of circle of positioning disk and the position of 100.1 respective side walls of mounting hole
First driving motor 4, positioning disk 100 make circumference operation, and as positioning disk 100 rotates one week, welding gun 7 is along the circumferential direction right one by one
Limit sleeve 110 is welded, and is welded between all limit sleeve 110 and positioning disk 100, as shown in Fig. 9, forms first
Road circular weld 120.
Then the position for adjusting welding gun 7, makes it be directed at the side in remotely located 100 center of circle of disk of each limit sleeve 110 and peace
The position for filling 100.1 respective side walls of hole carries out same soldering, forms second weld seam 130, limit sleeve each in this way
There is welding position at two between 110 uniform location disks 100, and all welded into same in two end faces of positioning disk 100,
Realization limit sleeve 110 is fixedly connected with positioning disk 100.
After the completion of two end faces are all welded, the bistrique on grinding rod 5 is replaced, surface wheel head is changed, on positioning disk 100
Welding position carries out horizontal milled processed, makes it have certain flatness.
Preferred embodiments of the present invention are described above, but are not to be construed as limiting the scope of the invention.This hair
Bright to be not only limited to above embodiments, specific structure is allowed to vary, all institutes in the protection scope of demand for independence of the present invention
The various change of work is within the scope of the invention.
Claims (6)
1. the welder of limit sleeve in a kind of needle roller grinding positioning disk, including be made of bottom plate (1) and four support footing (2)
Installation frame, it is characterised in that: rotation is equipped with clutch disk (3) on the bottom plate (1), and the top of clutch disk (3) is removable
Formula is equipped with positioning disk (100) to be welded；Bottom plate (1) is equipped with the first driving motor for being drivingly connected disk (3) rotation
(4), grinding mechanism and welding mechanism are circumferentially with along clutch disk (3) on the bottom plate (1)；
Removable in grinding mechanism to be equipped with grinding rod (5), the bistrique end of the grinding rod (5) sticks on table on positioning disk (100)
Face, and the circular passage position surrounded with each mounting hole (100.1) for being used to insert limit sleeve (110) on positioning disk (100)
Set corresponding, the diameter of the bistrique of the grinding rod (5) is greater than the diameter of mounting hole (100.1)；
Welding mechanism includes fixed link (6) and welding gun (7), and the welding gun (7) is removable to be located on fixed link (6), and welding gun
(7) one end close to fixed link (6) can adjust position with any angle, when grinding mechanism is to two ends on positioning disk (100)
On face after position grinding corresponding with welding, limit sleeve is successively inserted in the mounting hole (100.1) on positioning disk (100)
(110), the position of welding gun (7) is adjusted, the first driving motor (4) is drivingly connected disk (3) rotation, to drive positioning disk
(100) it rotates, starts welding gun (7), for each limit sleeve (110) to be welded and fixed.
It is additionally provided with control cabinet (8) on the bottom plate (1), the control cabinet (8) is electrically connected with the first driving motor (4), welding gun (7)
It connects.
2. the welder of limit sleeve in a kind of needle roller grinding positioning disk according to claim 1, it is characterised in that: described
Grinding mechanism include support rod (9), the support rod (9) is equipped with limiting section (10), is arranged on the support rod (9)
It installs casing (11), integrally formed with mounting plate (12), the upper table of the mounting plate (12) on installation casing (11) side wall
Face is equipped with the second driving motor (13) being arranged along the vertical direction, and the grinding rod (5) is detachably connected to the second driving motor
(13) on output shaft；The top for installing casing (11) is equipped with tight loop (14), and tight loop (14) is set in support rod (9) outside
Portion；It is additionally provided with spring (15) between tight loop (14) and installation casing (11), one end of spring (15) acts against tight loop (14)
Bottom surface, the other end acts against the top of installation casing (11), and spring (15) is set on first support bar (8).
3. the welder of limit sleeve in a kind of needle roller grinding positioning disk according to claim 2, it is characterised in that: described
Mounting plate (12) on be provided along its length the first kidney slot (12.1), the output shaft of second driving motor (13) is worn
It is located in the first kidney slot (12.1).
4. the welder of limit sleeve in a kind of needle roller grinding positioning disk according to claim 2 or 3, it is characterised in that:
The open slot (14.1) of upper and lower end face connection, the open slot (14.1) and fastening are radially equipped on the tight loop (14)
Inner hole connection is enclosed, and extends to other end side wall；Open side on the tight loop (14) close to open slot (14.1) is equipped with tight
Fixing bolt (16) tightens fastening bolt (16) when tight loop (14) is set on support rod (9), is used for open slot
(14.1) two sides connection clamps.
5. the welder of limit sleeve in a kind of needle roller grinding positioning disk according to claim 1, it is characterised in that: first
The output shaft of driving motor (4), which turns downward, to be threaded through on bottom plate (1), and the lower end of output shaft is connected with drive pulley
(17)；The bottom surface of clutch disk (3) center is equipped with shaft (18), and the lower end of shaft (18) can by bearing (19)
Rotation is located on bottom plate (1), and the lower end of shaft (18) is equipped with driven pulley (20), drive pulley (17) and follower belt
It takes turns and is connected between (20) by driving belt (21).
6. the welder of limit sleeve in a kind of needle roller grinding positioning disk according to claim 5, it is characterised in that: described
The bottom surface of bottom plate (1) is equipped with adjustable plate (22) close to driving belt (21) position, and described adjustable plate (22) one end is equipped with second
Waist-shaped hole (22.1) is equipped with attachment screw (23) in second waist type (22.1) hole, for adjustable plate (22) to be connected to bottom plate
(1) on, the other end of adjustable plate (22) is equipped with locating piece (24), and locating piece (24) is equipped with through-hole, and driving belt (21) can live
It is dynamic to wear in through-holes；The position for adjusting adjustable plate (22), for adjusting the elasticity of driving belt (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811380906.5A CN109604886B (en) | 2018-11-20 | 2018-11-20 | Welding device for limiting sleeve in needle roller grinding positioning disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811380906.5A CN109604886B (en) | 2018-11-20 | 2018-11-20 | Welding device for limiting sleeve in needle roller grinding positioning disc |
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| CN109604886A true CN109604886A (en) | 2019-04-12 |
| CN109604886B CN109604886B (en) | 2023-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811380906.5A Active CN109604886B (en) | 2018-11-20 | 2018-11-20 | Welding device for limiting sleeve in needle roller grinding positioning disc |
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| CN109604886B (en) | 2023-06-30 |
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