CN105750577B - A kind of bearing ring turning inner clamping type floating clamp - Google Patents
A kind of bearing ring turning inner clamping type floating clamp Download PDFInfo
- Publication number
- CN105750577B CN105750577B CN201610250715.1A CN201610250715A CN105750577B CN 105750577 B CN105750577 B CN 105750577B CN 201610250715 A CN201610250715 A CN 201610250715A CN 105750577 B CN105750577 B CN 105750577B
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- Prior art keywords
- holder
- hole
- positioning seat
- pin
- forms
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
- B23B31/16233—Jaws movement actuated by oblique surfaces of a coaxial control rod
- B23B31/16254—Jaws movement actuated by oblique surfaces of a coaxial control rod using fluid-pressure means to actuate the gripping means
- B23B31/16258—Jaws movement actuated by oblique surfaces of a coaxial control rod using fluid-pressure means to actuate the gripping means using mechanical transmission through the spindle
Abstract
The invention discloses a kind of bearing ring turning inner clamping type floating clamp, include the transition disc being fixedly connected on machine tool chief axis, housing is connected with transition disc, shell one end inwall forms the conical surface wide outside and narrow inside；The inwall of housing slidably connects a holder fixed plate, and a middle pull bar being connected with lathe piston rod is equipped with middle pull bar perforation；The holder of holder fixed plate periphery coordinates is arranged with one group of holder on shoulder, and holder is locked by fixed spring to be fixed in holder fixed plate；One end outer wall of the holder away from holder fixed plate forms the driven conical surface being slidably connected with the cone match；Master jaw is connected with holder, claw is connected with master jaw；Positioning seat is connected with transition disc, the positioning seat is connected with locating ring.The present invention is simple in construction, debugging is convenient, is adapted to the blank that scattered error is bigger, oval and larger taper, to the quality requirement of blank than relatively low.
Description
Technical field
The invention belongs to bearing ring processing equipment field, and in particular to a kind of bearing ring turning inner clamping type, which floats, to be pressed from both sides
Tool.
Background technology
The inner clamping type fixture jaw body that tradition uses all is fixed, requirement ratio during turning bearing ring to blank
Higher, if blank dimension scattered error is bigger, oval and taper is big, the product that turning goes out is difficult to meet technological requirement.
The content of the invention
The technical problems to be solved by the invention are：In view of the deficienciess of the prior art, provide a kind of simple in construction, tune
Examination is convenient, processing is simple, being adapted to scattered error, bigger, the larger blank of oval and taper bearing ring turning inner clamping type floats
Fixture.
To realize the purpose of the present invention, it is achieved using following technical scheme：A kind of bearing ring turning inner clamping type floats
Dynamic fixture, includes the transition disc being fixedly connected on machine tool chief axis, and one end periphery on transition disc different from machine tool chief axis is fixed
The housing of a circular tube shaped is connected with, one end inwall of the housing away from transition disc forms the conical surface wide outside and narrow inside；
The inwall of the housing slidably connects a holder fixed plate, and holder fixed plate intermediary form has middle pull bar to wear
Hole, a middle pull bar being connected with lathe piston rod is equipped with the perforation of middle pull bar；The holder fixed plate is away from transition disc one
The intermediary form at end has middle pull bar to coordinate step, the holder fixed plate periphery close to one end of transition disc form with housing
The housing that wall is slidably matched coordinates shoulder, and the described one end of holder fixed plate periphery away from transition disc forms holder and coordinates platform
Shoulder；
The transition disc intermediary form has the central hole that pull bar passes through in confession；
The holder of the holder fixed plate periphery coordinates is arranged with one group of holder on shoulder, and the holder passes through fixed spring
It is locked and is fixed in holder fixed plate；
The holder is circumferentially made up of 6 structure identical clamping plates, and the holder inwall forms matches somebody with somebody with the holder
The locating groove that shoulder coordinates positioning is closed, the holder outer wall forms the spring card slot for installing the fixed spring；Institute
State one end outer wall of the holder away from holder fixed plate and form the driven conical surface being slidably connected with the cone match；
One end on the holder close to the driven conical surface is fixedly connected with master jaw, and card is fixedly connected with the master jaw
Pawl；
A positioning seat is connected with by positioning seat supporting pin on the transition disc, the positioning seat is close to one end of clamping jaw
It is fixedly connected with locating ring.
Preferably：One end of the transition disc forms the cooperation concave station b being connected with machine tool chief axis, described
The other end of transition disc forms the cooperation concave station a being connected with the housing；6 counterbores are also formed on the transition disc
A, 6 counterbore b and 3 screwed hole a, the counterbore a are fixedly connected with the casing by screw, and the counterbore b passes through screw and mistake
Disk connection is crossed, described positioning seat supporting pin one end is threadedly coupled with the screwed hole a；
Described positioning seat supporting pin one end forms the transition disc connecting screw being connected with the screwed hole a, positioning seat branch
The other end of support pin forms the positioning seat connecting screw hole being connected with positioning seat, and positioning seat supporting pin connects spiral shell close to positioning seat
The position in hole forms the spanner cooperation step that positioning seat supporting pin was tightened or unclamped to spanner easy to use.
Preferably：The one end of the housing away from the conical surface forms screwed hole b corresponding with the counterbore a；Institute
Housing sidewall is stated to form to mitigate the lightening hole of case weight.
Preferably：The position that positioning seat supporting pin is corresponded in the holder fixed plate is formed for positioning seat supports
Sell through supporting pin perforation.
Preferably：Each clamping plate of the holder forms two master jaw connections close to one end of the driven conical surface
Screw, the position on each clamping plate between two master jaw connecting screw holes form a pin-and-hole a.
Preferably：The intermediary form of the positioning seat has locating ring positioning hole, and support is also formed on positioning seat
Pin connection counterbore and more than 2 groups of locating ring connecting screw hole, every group of locating ring connecting screw hole include setting along positioning seat is circumferentially equidistant
3 put, support pin connection counterbore are fixedly connected by screw with the positioning seat connecting screw hole in positioning seat supporting pin.
Preferably：One end intermediary form of the locating ring has the positioning being connected with locating ring positioning hole
Head；The other end periphery of the locating ring forms 3 locating dowels, and the locating ring periphery is between two neighboring locating dowel
Part be plane.
Preferably：It is heavy to form holder connection for position corresponding with master jaw connecting screw hole on the master jaw
Hole, it is fixedly connected between holder connection counterbore and master jaw connecting screw hole by screw；It is corresponding with pin-and-hole a on the master jaw
Position forms pin-and-hole b, and pin-and-hole b internal diameter is less than pin-and-hole a internal diameter, and alignment pin is plugged between pin-and-hole a and pin-and-hole b；Institute
State and form claw connection screw thread hole close to the position of holder connection counterbore on master jaw.
Preferably：The claw is curved, and cylindrical hole is formed on claw, and cylindrical hole passes through screw and the card
Pawl connection screw thread hole connects, and is inserted with support set in the cylindrical hole, the position between cylindrical hole and the claw connection screw thread hole
Put pad and be provided with O-ring；The claw side wall is the clamping face of dentation.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention is simple in construction, debugging is convenient, processing is simple,
The blank that scattered error is bigger, oval and larger taper is adapted to, to the quality requirement of blank than relatively low.Solves existing inner clip
Requirement of the formula chuck to blank is higher, if blank dimension scattered error is bigger, oval and taper is big, the product that turning goes out is difficult
The problem of meeting technological requirement.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Fig. 2 is Fig. 1 right view.
Fig. 3 is the structural representation of transition disc.
Fig. 4 is Fig. 3 right view.
Fig. 5 is the structural representation of housing.
Fig. 6 is Fig. 5 left view.
Fig. 7 is the structural representation of holder fixed plate.
Fig. 8 is Fig. 7 left view.
Fig. 9 is the structural representation of positioning seat supporting pin.
Figure 10 is the structural representation of holder.
Figure 11 is Figure 10 right view.
Figure 12 is the structural representation of positioning seat.
Figure 13 is Figure 12 right view.
Figure 14 is the structural representation of locating ring.
Figure 15 is Figure 14 right view.
Figure 16 is the structural representation of master jaw.
Figure 17 is the cross section structure diagram of master jaw.
Figure 18 is the structural representation of claw.
1st, machine tool chief axis；
2nd, transition disc；20th, central hole；21st, concave station a is coordinated；22nd, counterbore a；23rd, counterbore b；24th, concave station b is coordinated；25、
Screwed hole a；
3rd, housing；31st, the conical surface；32nd, lightening hole；33rd, screwed hole b；
4th, holder fixed plate；41st, holder coordinates shoulder；42nd, housing coordinates shoulder；43rd, middle pull bar coordinate step, 44, in
Pull bar perforation, 45, supporting pin perforation；
5th, middle pull bar；
6th, positioning seat supporting pin；61st, positioning seat connecting screw hole；62nd, spanner coordinates step；63rd, transition disc connecting screw；
7th, fixed spring；
8th, holder；81st, master jaw connecting screw hole；82nd, the driven conical surface；83rd, locating groove；84th, spring card slot；85th, pin-and-hole
a；
9th, positioning seat；91st, locating ring connecting screw hole, 92, support pin connection counterbore, 93, locating ring positioning hole；
10th, locating ring；101st, locating dowel；102nd, positioning seat connection counterbore；103rd, positioning head；
11st, master jaw；111st, holder connection counterbore；112nd, pin-and-hole b；113rd, claw connection screw thread hole；
12nd, O-ring；
13rd, claw；131st, cylindrical hole；132nd, clamping face；14th, support set；15th, alignment pin.
Embodiment
The embodiment of the present invention is made a detailed explanation below according to accompanying drawing.
Embodiment 1
According to Fig. 1 and Figure 18, a kind of bearing ring turning inner clamping type floating clamp described in the present embodiment, include
The transition disc 2 being fixedly connected on machine tool chief axis 1, one end periphery on transition disc different from machine tool chief axis are fixedly connected with a circle
The housing 3 of tubulose, one end inwall of the housing away from transition disc form the conical surface 31 wide outside and narrow inside.
The inwall of the housing slidably connects a holder fixed plate 4, and holder fixed plate intermediary form has middle pull bar to wear
Hole 44, a middle pull bar 5 being connected with lathe piston rod is equipped with the perforation of middle pull bar；The holder fixed plate is away from transition disc
The intermediary form of one end has middle pull bar to coordinate step 43, and the holder fixed plate periphery is formed close to one end of transition disc and shell
The housing that internal wall is slidably matched coordinates shoulder 42, and the described one end of holder fixed plate periphery away from transition disc forms holder and matched somebody with somebody
Close shoulder 41.
The transition disc intermediary form has the central hole 20 that pull bar passes through in confession.
The holder of the holder fixed plate periphery, which coordinates, is arranged with one group of holder 8 on shoulder, the holder passes through fixed bullet
Spring 7, which is locked, to be fixed in holder fixed plate.
The holder is circumferentially made up of 6 structure identical clamping plates, and the holder inwall forms matches somebody with somebody with the holder
The locating groove 83 that shoulder coordinates positioning is closed, the holder outer wall forms the spring card slot for installing the fixed spring
84；One end outer wall of the holder away from holder fixed plate forms the driven conical surface 82 being slidably connected with the cone match.
One end on the holder close to the driven conical surface is fixedly connected with master jaw 11, is fixedly connected with the master jaw
Claw 13.
A positioning seat 9 is connected with by positioning seat supporting pin on the transition disc, the positioning seat close to clamping jaw one
End is fixedly connected with locating ring 10.
One end of the transition disc 2 form with machine tool chief axis be connected cooperation concave station b24, the transition disc it is another
One end forms the cooperation concave station a21 being connected with the housing；Also formed on the transition disc 6 counterbore a22,6
Counterbore b23 and 3 screwed hole a25, the counterbore a are fixedly connected by screw with housing 3, and the counterbore b passes through screw and mistake
Disk connection is crossed, described positioning seat supporting pin one end is threadedly coupled with the screwed hole a；Described positioning seat supporting pin one end forms
The transition disc connecting screw 63 being connected with the screwed hole a, the other end of positioning seat supporting pin form what is be connected with positioning seat
Positioning seat connecting screw hole 61, and positioning seat supporting pin forms spanner easy to use close to the position of positioning seat connecting screw hole and tightened
Or the spanner cooperation step 62 of positioning seat supporting pin is unclamped, spanner coordinates step to be one group of parallel wall surface.
The one end of the housing away from the conical surface forms screwed hole b33 corresponding with the counterbore a；The housing sidewall into
Type has the lightening hole 32 for mitigating case weight.
The position that positioning seat supporting pin is corresponded in the holder fixed plate forms the support passed through for positioning seat supporting pin
Pin perforation 45.
Each clamping plate of the holder forms two master jaw connecting screw holes 81 close to one end of the driven conical surface, each folder
Position on plate between two master jaw connecting screw holes forms a pin-and-hole a85.
The intermediary form of the positioning seat 9 has locating ring positioning hole 93, and support pin connection counterbore is also formed on positioning seat
More than 92 and 2 groups of locating ring connecting screw hole 91, every group of locating ring connecting screw hole are included along the 3 of the circumferentially equidistant setting of positioning seat
Individual, support pin connection counterbore is fixedly connected by screw with the positioning seat connecting screw hole in positioning seat supporting pin.
One end intermediary form of the locating ring 10 has the positioning head 103 being connected with locating ring positioning hole；It is described fixed
The other end periphery of position ring forms 3 locating dowels 101, part of the locating ring periphery between two neighboring locating dowel
For plane；The positioning seat connection counterbore 102 corresponding with locating ring connecting screw hole position, positioning seat are formed on the locating ring
Connection counterbore is connected by screw with locating ring connecting screw hole.
Position corresponding with master jaw connecting screw hole forms holder connection counterbore 111 on the master jaw 11, and holder connects
Connect and be fixedly connected between counterbore and master jaw connecting screw hole by screw；Position shaping corresponding with pin-and-hole a on the master jaw
There is pin-and-hole b112, and pin-and-hole b internal diameter is less than pin-and-hole a internal diameter, and alignment pin 15 is plugged between pin-and-hole a and pin-and-hole b；The card
In pawl seat claw connection screw thread hole 113 is formed close to the position of holder connection counterbore.
The claw is curved, and cylindrical hole 131 is formed on claw, and cylindrical hole passes through screw and the claw connection screw thread
Hole connects, and is inserted with support set 14 in the cylindrical hole, and the position pad between cylindrical hole and the claw connection screw thread hole is provided with O
Type circle 12；The claw side wall is the clamping face 132 of dentation.
In use, transition disc and housing are connected first, then transition disc and housing are fixed on lathe together,
Then root fixed spring is attached in the spring card slot of holder, then holder is attached in holder fixed plate, then holder consolidated
Fixed board is engaged with housing, and then middle pull bar is connected on lathe piston rod, and positioning seat supporting pin is then connected to transition
On disk, then positioning seat is connected in positioning seat supporting pin, then claw fixed seat is attached on holder with alignment pin, is used in combination
It is bolted on holder, resilient, elastomeric and support set is loaded in six pieces of claws and claw is all connected to six screws
On master jaw, then locating ring is connected on positioning seat.So inner clamping type floating clamp installation, has debugged concentricity
Afterwards, it is possible to process lasso.During processing, first workpiece P is put on claw, bucket cylinder pedal is then stepped on, makes piston rod band
Pull bar in dynamic, middle pull bar band dynamic holder fixed plate move to lathe inside, so pass through the relative slip of the conical surface and the driven conical surface
Claw is set to reduce clamping collar external diameter.
In summary, only the preferred embodiments of the invention, does not limit protection scope of the present invention, Fan Yibenfa with this
The equivalent changes and modifications that bright the scope of the claims and description are made, it is all within the scope of the utility model patent covers.
Claims (6)
- A kind of 1. bearing ring turning inner clamping type floating clamp, it is characterised in that：Include and be fixedly connected on machine tool chief axis Transition disc, one end periphery on transition disc different from machine tool chief axis are fixedly connected with the housing of a circular tube shaped, and the housing is remote One end inwall of transition disc forms the conical surface wide outside and narrow inside；The inwall of the housing slidably connects a holder fixed plate, and holder fixed plate intermediary form has middle pull bar to perforate, in A middle pull bar being connected with lathe piston rod is equipped with pull bar perforation；The holder fixed plate is away from transition disc one end Between form middle pull bar and coordinate step, the holder fixed plate periphery is formed close to one end of transition disc and inner walls are slided The housing of cooperation coordinates shoulder, and the described one end of holder fixed plate periphery away from transition disc forms holder and coordinates shoulder；The transition disc intermediary form has the central hole that pull bar passes through in confession；The holder of the holder fixed plate periphery coordinates is arranged with one group of holder on shoulder, and the holder is locked by fixed spring It is fixed in holder fixed plate；The holder is circumferentially made up of 6 structure identical clamping plates, and the holder inwall forms coordinates platform with the holder Shoulder coordinates the locating groove of positioning, and the holder outer wall forms the spring card slot for installing the fixed spring；The folder One end outer wall of the seat away from holder fixed plate forms the driven conical surface being slidably connected with the cone match；One end on the holder close to the driven conical surface is fixedly connected with master jaw, and claw is fixedly connected with the master jaw；A positioning seat is connected with by positioning seat supporting pin on the transition disc, the positioning seat is fixed close to one end of clamping jaw It is connected with locating ring；One end of the transition disc forms the cooperation concave station b being connected with machine tool chief axis, the other end of the transition disc into Type has the cooperation concave station a being connected with the housing；6 counterbore a, 6 counterbore b and 3 are also formed on the transition disc Screwed hole a, the counterbore a are fixedly connected with the casing by screw, and the counterbore b is connected by screw with transition disc, described fixed Position seat supports pin one end is threadedly coupled with the screwed hole a；Described positioning seat supporting pin one end forms the transition disc connecting screw being connected with the screwed hole a, positioning seat supporting pin The other end form the positioning seat connecting screw hole being connected with positioning seat, and positioning seat supporting pin is close to positioning seat connecting screw hole Position forms the spanner cooperation step that positioning seat supporting pin was tightened or unclamped to spanner easy to use；The one end of the housing away from the conical surface forms screwed hole b corresponding with the counterbore a；The housing sidewall forms use To mitigate the lightening hole of case weight；The position that positioning seat supporting pin is corresponded in the holder fixed plate forms the supporting pin passed through for positioning seat supporting pin and worn Hole.
- A kind of 2. bearing ring turning inner clamping type floating clamp according to claim 1, it is characterised in that：The holder Each clamping plate forms two master jaw connecting screw holes close to one end of the driven conical surface, connects on each clamping plate positioned at two master jaws Connect the position between screw and form a pin-and-hole a.
- A kind of 3. bearing ring turning inner clamping type floating clamp according to claim 1, it is characterised in that：The positioning seat Intermediary form have locating ring positioning hole, also formed on positioning seat support pin connection counterbore and more than 2 groups locating ring connection Screw, every group of locating ring connecting screw hole include 3 along the circumferentially equidistant setting of positioning seat, support pin connection counterbore by screw with Positioning seat connecting screw hole in positioning seat supporting pin is fixedly connected.
- A kind of 4. bearing ring turning inner clamping type floating clamp according to claim 3, it is characterised in that：The locating ring One end intermediary form have with locating ring positioning hole be connected positioning head；The other end periphery of the locating ring forms 3 Individual locating dowel, part of the locating ring periphery between two neighboring locating dowel are plane.
- A kind of 5. bearing ring turning inner clamping type floating clamp according to claim 2, it is characterised in that：The master jaw Upper position corresponding with master jaw connecting screw hole forms holder connection counterbore, holder connection counterbore and master jaw connecting screw hole it Between be fixedly connected by screw；Position corresponding with pin-and-hole a forms pin-and-hole b on the master jaw, and pin-and-hole b internal diameter is less than Pin-and-hole a internal diameter, alignment pin is plugged between pin-and-hole a and pin-and-hole b；On the master jaw close to holder connection counterbore position into Type has claw connection screw thread hole.
- A kind of 6. bearing ring turning inner clamping type floating clamp according to claim 5, it is characterised in that：The claw is in Arc, cylindrical hole is formed on claw, cylindrical hole is connected by screw with the claw connection screw thread hole, the cylindrical hole interpolation Provided with support set, the position pad between cylindrical hole and the claw connection screw thread hole is provided with O-ring；The claw side wall is dentation Clamping face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610250715.1A CN105750577B (en) | 2016-04-21 | 2016-04-21 | A kind of bearing ring turning inner clamping type floating clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610250715.1A CN105750577B (en) | 2016-04-21 | 2016-04-21 | A kind of bearing ring turning inner clamping type floating clamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105750577A CN105750577A (en) | 2016-07-13 |
| CN105750577B true CN105750577B (en) | 2018-03-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610250715.1A Active CN105750577B (en) | 2016-04-21 | 2016-04-21 | A kind of bearing ring turning inner clamping type floating clamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105750577B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106695392A (en) * | 2017-03-10 | 2017-05-24 | 于浩 | Spring clamp for machining bearing outer ring |
| CN110421484A (en) * | 2019-07-31 | 2019-11-08 | 沈阳建筑大学 | A kind of pneumatic inner support clamping device for processing ceramic bearing ring interior raceway groove |
| CN111730501B (en) * | 2020-06-19 | 2021-05-04 | 南京晨光集团有限责任公司 | Processing device for precise micropore flow calibration |
| CN112719976A (en) * | 2020-12-22 | 2021-04-30 | 中船重工龙江广瀚燃气轮机有限公司 | Thin-wall part turning clamping device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86105360A (en) * | 1986-08-29 | 1988-03-09 | 架夹盘公司 | Fast change top jaw system |
| CN202461575U (en) * | 2011-10-31 | 2012-10-03 | 吴朱刚 | Novel chuck |
| CN202779871U (en) * | 2012-07-23 | 2013-03-13 | 山东省宇捷轴承制造有限公司 | Fixture |
| CN205551509U (en) * | 2016-04-21 | 2016-09-07 | 浙江天马轴承有限公司 | Unsteady anchor clamps of formula of pressing from both sides in bearing ring turning |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61152306A (en) * | 1984-12-25 | 1986-07-11 | Toyoda Mach Works Ltd | Eccentric chuck device for crankshaft |
| DE202009014451U1 (en) * | 2009-09-10 | 2010-02-11 | Schenck Rotec Gmbh | Chuck with jaws moved radially outwards for clamping |
-
2016
- 2016-04-21 CN CN201610250715.1A patent/CN105750577B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86105360A (en) * | 1986-08-29 | 1988-03-09 | 架夹盘公司 | Fast change top jaw system |
| CN202461575U (en) * | 2011-10-31 | 2012-10-03 | 吴朱刚 | Novel chuck |
| CN202779871U (en) * | 2012-07-23 | 2013-03-13 | 山东省宇捷轴承制造有限公司 | Fixture |
| CN205551509U (en) * | 2016-04-21 | 2016-09-07 | 浙江天马轴承有限公司 | Unsteady anchor clamps of formula of pressing from both sides in bearing ring turning |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105750577A (en) | 2016-07-13 |
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Address after: 313200 8 Canal Road, Lin Hang industrial area, Lei Dian Town, Deqing County, Huzhou, Zhejiang Patentee after: ZHEJIANG TIANMA BEARING GROUP Co.,Ltd. Address before: 313200 8 Canal Road, Lin Hang industrial area, Lei Dian Town, Deqing County, Huzhou, Zhejiang Patentee before: ZHEJIANG TIANMA BEARING Co.,Ltd. |
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