CN107622913A - A kind of adjustment mechanism for relay spring - Google Patents
A kind of adjustment mechanism for relay spring Download PDFInfo
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- CN107622913A CN107622913A CN201710964929.XA CN201710964929A CN107622913A CN 107622913 A CN107622913 A CN 107622913A CN 201710964929 A CN201710964929 A CN 201710964929A CN 107622913 A CN107622913 A CN 107622913A
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- relay
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Abstract
The present invention relates to adaptive polarizing memory voltage time constant accessory technical field, in particular disclose a kind of adjustment mechanism for relay spring, including frame, it is arranged at the adjustment component of frame, frame is provided with supporting region, adjustment component includes being slideably positioned in the first actuator of frame, the second actuator for driving the first actuator, rotates the adjustment part set, and the first actuator is used to drive adjustment part to rotate, and adjustment part is provided with fluting；During use, relay to be adjusted is placed on supporting region, then the second actuator drives the related adjustment part of the first actuator to be moved towards close to the direction of relay, until the reed of relay is installed with fluting, then the first actuator driving adjustment part rotates forward or backwards, when adjustment part rotates, the side wall of fluting contradicts reed so as to which related reed rotates, and then the adjust automatically to crooked reed is realized, reed is manually adjusted without staff, lifts the regulated efficiency of reed.
Description
Technical field
The present invention relates to adaptive polarizing memory voltage time constant accessory technical field, in particular discloses a kind of adjustment machine for relay spring
Structure.
Background technology
Electromagnetic relay has been member substantially essential in many electronic equipments as " automatic switch " in circuit
One of part, electromagnetic relay include the spring assembly being turned on or off each other, and spring assembly mostly includes dynamic spring and quiet spring,
During the manufacturing of electromagnetic relay, it is necessary to by dynamic spring and quiet spring via material strip punch forming, then again by dynamic spring and quiet
Spring is assembled on the body of relay, after relay is completed, is moved spring or quiet spring it some times happens that crooked, so be will result in
Relay assembly failure, mainly manually adjust crooked dynamic spring or quiet spring, the tune of reed by operating personnel in the prior art
Whole efficiency is extremely low, it is impossible to meets the needs of modern production.
The content of the invention
In order to overcome shortcoming and defect present in prior art, it is an object of the invention to provide one kind to be used for relay
The adjustment mechanism of reed, realizes the adjust automatically to crooked reed, and reed is manually adjusted without staff, lifts the tune of reed
Whole efficiency.
To achieve the above object, a kind of adjustment mechanism for relay spring of the invention, including frame, are arranged at machine
The adjustment component of frame, frame, which is provided with, is used to carrying the supporting region of relay, adjustment component be used to adjusting supporting region carried after
The reed of electrical equipment；It is described adjustment component include be slideably positioned in frame the first actuator, for drive the first actuator it is close
Or the second actuator, the adjustment part of rotation setting of the relay carried away from supporting region, the first actuator, which is used to drive, to be adjusted
One integral piece rotates, and adjustment part is provided with the fluting for being used for being installed with reed.
Preferably, the adjustment component also includes the first saddle for being slideably positioned in frame, and the second actuator is used to drive
The relay that first saddle is carried closer or far from supporting region, the first actuator are installed in the first saddle, and adjustment part is rotated and set
It is placed in the first saddle.
Preferably, the adjustment component also includes dial and indication piece, and dial is installed in the first saddle or/and first
Actuator, indication piece are installed in adjustment part, and indication piece is used for the scale of indication dial disc.
Preferably, the adjustment part includes bull stick and adjustment head, and bar rotation is arranged at the first saddle, and the first actuator is used
In driving bar rotation, the one end for adjusting head is removably attachable to bull stick, and fluting is arranged at the other end of adjustment head, and fluting is certainly
The end face of the other end of adjustment head is recessed to be formed.
Preferably, the adjustment mechanism also includes being used to position relay to the positioning component of supporting region, positioning component
The movable block of frame is arranged at including being installed in the block of frame, rotating, for driving movable block closer or far from the of block
Three actuators, block, movable block are used to clamp the relay that supporting region is carried.
Preferably, the movable block includes body and the clamping part being connected with body, and block, clamping part are used to clamp
The relay that supporting region is carried, one end of body, which rotates, is arranged at frame, is provided between the other end and frame of body
First elastic component, the first elastic component are used to drive movable block reset, and the output end of the 3rd actuator is used to contradict the another of body
One end.
Preferably, the positioning component also include be slideably positioned in body the second saddle, be installed in the second saddle with
The second elastic component between body, the second saddle are used to contradict the relay that supporting region is carried, block, clamping part, second
Relay is positioned at supporting region by saddle jointly, and the second elastic component is used to drive the second saddle to reset.
Preferably, the positioning component also includes impeller, and one end of impeller is connected with the output end of the 3rd actuator,
The other end of impeller is provided with the projection portion of bending extension, and projection portion is used for the other end for contradicting movable block.
Preferably, the adjustment mechanism also includes displacement detecting component, and displacement detecting component is used to detect adjustment component tune
The displacement of whole reed, displacement detecting component include the displacement transducer for being arranged at frame and the light coordinated with displacement transducer
Line transmitter, the detection light that light emitters are sent expose to reed to be adjusted and are reflected back displacement transducer.
Preferably, the test component that the relay that the adjustment mechanism also includes being used to carry supporting region is powered, is surveyed
Testing component includes the power supply source for the test head and test head electric connection for being movably set in frame, for driving test head to move
Fourth drive member.
Beneficial effects of the present invention：During actual use, the crooked relay of reed is placed on carrying by extraneous manipulator
Qu Shang, then the second actuator drives the related adjustment part of the first actuator to be moved towards close to the direction of relay, until relay
Reed be installed with fluting, then the first actuator driving adjustment part rotate forward or backwards, adjustment part rotate when, fluting
Side wall contradicts reed so as to which related reed rotates, and then realizes the adjust automatically to crooked reed, is adjusted manually without staff
Whole reed, lift the regulated efficiency of reed.
Brief description of the drawings
Fig. 1 is the dimensional structure diagram of the present invention；
Fig. 2 is the dimensional structure diagram of the adjustment component of the present invention；
Fig. 3 is the close-up schematic view of part A in Fig. 2；
Fig. 4 is that the present invention hides the dimensional structure diagram after adjustment component, test component；
Fig. 5 is the close-up schematic view of part B in Fig. 4；
Fig. 6 is the dimensional structure diagram of the test component of the present invention.
Reference includes：
1-frame, 2-supporting region 3-adjustment component
4-the first actuator 6-adjustment part of the 5-the second actuator
7-fluting, 8-the first 9-dial of saddle
11-indication piece, 12-bull stick 13-adjustment head
14-positioning component, 15-block, 16-movable block
17-the three actuator 18-body, 19-clamping part
21-the first elastic component the 23-the second elastic component of the 22-the second saddle
24-impeller, 25-projection portion, 26-detection components
27-test component 28-first 29-fourth drive member of test.
Embodiment
For the ease of the understanding of those skilled in the art, the present invention is made further with reference to embodiment and accompanying drawing
Bright, the content that embodiment refers to not is limitation of the invention.
Refer to shown in Fig. 1 to Fig. 3, a kind of adjustment mechanism for relay spring of the invention, including frame 1, if
The adjustment component 3 in frame 1 is put, frame 1 is provided with the supporting region 2 for being used for carrying relay, and adjustment component 3 is held for adjustment
Carry the reed for the relay that area 2 is carried；The adjustment component 3 includes the first actuator 4, the use being slidably arranged in frame 1
The adjustment that the second actuator 5, rotation in the relay that the first actuator 4 of driving is carried closer or far from supporting region 2 are set
Part 6, it is preferable that the first actuator 4 is motor, and adjustment part 6 can be directly installed on the output shaft of the first actuator 4, first
Actuator 4 is used to drive adjustment part 6 to rotate forward or backwards, and adjustment part 6, which is provided with, to be used to be installed with the fluting 7 of reed, slot 7 width
Thickness of the degree more than the reed of relay.
During actual use, the crooked relay of reed is placed on supporting region 2 by extraneous manipulator, then the second driving
Part 5 drives the first actuator 4 to be moved towards the direction of the relay carried close to supporting region 2, and the first actuator 4 is related when moving
Adjustment part 6 moves towards close to the direction of relay together, until the reed of relay is installed with fluting 7, then the second driving
Part 5 stops, and subsequent first actuator 4 drives adjustment part 6 to rotate forward or backwards, and when adjustment part 6 rotates, 7 side wall of slotting is supported
Reed is touched so as to which related reed rotates, and then realizes the adjust automatically to crooked reed, reed is manually adjusted without staff,
Lift the regulated efficiency of reed.After the completion of reed adjustment, the second actuator 5 drives 4 related adjustment part 6 of the first actuator multiple
Position, the adjustment operation for adjustment part 6 next time are ready.
According to being actually needed, the quantity for adjusting component 3 can be two, and relay is adjusted respectively using two adjustment components 3
The dynamic spring and quiet spring of device, further lift the regulated efficiency of the reed of relay, it is preferable that two adjustment components 3 are located at respectively
The both sides of supporting region 2, in the operation process that two adjust component 3, prevent two adjustment components 3 from colliding interference, lifted
The performance of adjustment mechanism.
The adjustment component 3 also includes the first saddle 8 being slidably arranged in frame 1, and the first saddle 8 is substantially in flat board
Shape, slide rail (non-label in figure) is installed in frame 1, the first saddle 8 is slidably connected on slide rail, using slide rail to the first saddle
8 glide direction is guided, and avoids the first saddle 8 from occurring crooked, the second actuator 5 be used to driving the first saddle 8 close or
The relay carried away from supporting region 2, the first actuator 4 are installed on the first saddle 8, and adjustment part 6 is rotatably arranged on first
On saddle 8, adjustment part 6 is supported using the first saddle 8；In the present embodiment, the outer sheath of adjustment part 6 is provided with rolling bearing (in figure
Non- label), rolling bearing is arranged on the first saddle 8.
The adjustment component 3 also includes dial 9 and indication piece 11, and dial 9 is installed on the first saddle 8 or/and the
On one actuator 4, indication piece 11 is installed on adjustment part 6, and dial 9 is provided with the multiple scales being spaced and (do not shown in figure
Show), indication piece 11 is used for the scale of indication dial disc 9, and the scale of dial 9 is used for the rotational angle size for showing adjustment part 6.
In the present embodiment, dial 9 is substantially in sector, and the center of dial 9 is return-to-zero, and multiple scales are on the point symmetry that is zeroed
Set.When first actuator 4 driving adjustment part 6 rotates forward or backwards, the related indication piece 11 of adjustment part 6 rotates together, uses
Person can learn the actual rotation angular dimension of adjustment part 6 via the cooperation of indication piece 11 and dial 9, convenient to be driven to first
The setting of the actual operation parameters of part 4.
The adjustment part 6 includes bull stick 12 and adjustment first 13, and bull stick 12 is rotatably arranged on the first saddle 8, bull stick 12
Outer sheath is provided with rolling bearing, and rolling bearing is arranged on the first saddle 8, and the first actuator 4 is used to drive bull stick 12 to rotate, and adjusts
Whole first 13 one end is detachably connected on bull stick 12, and fluting 7 is arranged on the other end of adjustment first 13,7 self-adjustings of slotting
The end face of first 13 other end is recessed to be formed；In the present embodiment, cylindric, the edge of fluting 7 adjustment of the substantially strip of adjustment first 13
First 13 radial direction is through adjustment first 13.After crooked reed is installed with fluting 7, the first actuator 4 driving bull stick
12 rotate forward or backwards, bull stick 12 rotate when related adjustment first 13 rotate together, adjustment it is first 13 rotate when can drive it is crooked
Reed rotate, and then realize to the adjust automatically of crooked reed.
Refer to shown in Fig. 1 to Fig. 5, the adjustment mechanism also includes being used to position relay to the positioning of supporting region 2
Component 14, positioning component 14 include be installed in frame 1 block 15, be rotatably arranged in frame 1 movable block 16, for driving
Closer or far from the 3rd actuator 17 of block 15, block 15, movable block 16 are carried dynamic movable block 16 for clamping supporting region 2
Relay.After treating that the crooked relay of reed is placed on the supporting region 2 of frame 1, the 3rd actuator 17 driving movable block
16 move towards close to the direction of block 15, and then clamp relay using the cooperation of block 15 and movable block 16, then adjust
Component 3 can be adjusted to crooked reed, and during adjustment component 3 adjusts to reed, positioning component 14 is by reed
Supporting region 2 is positioned at, prevents relay from position movement, the yield of lifting reed adjustment occurs in supporting region 2.
The movable block 16 includes body 18 and the clamping part 19 being connected with body 18, and block 15, clamping part 19 are used
In the relay that clamping supporting region 2 is carried, one end of body 18 is rotatably arranged in frame 1, for example, the one of body 18
End is articulated in frame 1 via pivot, and the first elastic component 21, the first elasticity are provided between the other end and frame 1 of body 18
Part 21 is used to drive movable block 16 to reset, and in the present embodiment, the first elastic component 21 is spring, and the both ends of spring contradict frame respectively
1 and the other end of body 18, the output end of the 3rd actuator 17 is used for the other end for contradicting body 18.
After treating that the crooked relay of reed is placed on the supporting region 2 of frame 1, the 3rd actuator 17 driving body 18
The other end so that body 18 rotates relative to frame 1, body 18 rotate during, the length of the first elastic component 21
It is elongated or shortens so that 21 flexible restoring force of the first elastic component, related clamping part 19 is towards close when body 18 rotates
The direction movement of block 15, and then relay is clamped using clamping part 19 and block 15, it is then i.e. right using adjustment component 3
Reed is adjusted；After the completion for the treatment of reed adjustment, the 3rd actuator 17 reverse movement resets, the first elastic component 21 driving movable block
16 reverse movements reset.
The positioning component 14 also include be slidably arranged on body 18 the second saddle 22, be installed in the second saddle 22
The second elastic component 23 between body 18, the second elastic component 23 are used to drive the second saddle 22 to reset, and the second saddle 22 is used
In contradicting the relay that is carried of supporting region 2, in the present embodiment, the second elastic component 23 is spring, the both ends of the second elastic component 23
One end of the saddle 22 of body 18 and second is connected respectively, the other end of the second saddle 22 is used for the relay for contradicting supporting region 2,
Relay is positioned at supporting region 2 by block 15, clamping part 19, the second saddle 22 jointly.In the present embodiment, body 18 is provided with
Guide groove (non-label in figure), the second saddle 22 are slided and are installed with guide groove, and the second saddle 22 runs through body 18.
After the crooked relay of reed is placed on supporting region 2, the 3rd actuator 17 drives the other end of body 18, makes
Obtain body 18 to rotate relative to frame 1, and then clamping part 19 is moved towards close to the direction of block 15, now the second saddle 22
The other end contradict on the side of relay, with being rotated further for body 18, clamping part 19 clamps respectively with block 15
In the side wall of the other both sides of relay, block 15, clamping part 19, the second saddle 22 contradict in different three of relay respectively
In side wall, it is ensured that relay is steadily positioned at supporting region 2, and then reed is adjusted using adjustment component 3, treats reed
After the completion of adjustment, the 3rd actuator 17 reverse movement resets, and the second elastic component 23 drives the second saddle 22 reverse movement to reset.
The positioning component 14 also includes impeller 24, and impeller 24 is substantially in tabular, one end of impeller 24 and the
The output end connection of three actuators 17, the other end of impeller 24 are provided with the projection portion 25 of bending extension, and projection portion 25 is used to support
Touch the other end of movable block 16.During actual use, the 3rd actuator 17 driving impeller 24 moves, and mobile impeller 24 is related
Projection portion 25 moves together, and projection portion 25 can promote movable block 16 to rotate when moving.
The adjustment mechanism also includes displacement detecting component 26, and displacement detecting component 26 is used for detection adjustment component 3 and adjusted
Reed displacement, displacement detecting component 26 include being arranged on displacement transducer (not shown) in frame 1 and with position
The light emitters (not shown) that displacement sensor coordinates, the detection light that light emitters are sent expose to spring to be adjusted
Piece is simultaneously reflected back displacement transducer.During actual use, after treating that relay is placed on supporting region 2, what light emitters were sent
Detection light is radiated on crooked reed is reflected back displacement transducer again, and the crooked inclined of reed is detected using displacement transducer
Amount, it then can trigger adjustment component 3 and adjust reed, during adjustment component 3 adjusts reed, displacement detecting component 26 is examined
Survey the displacement of reed and then ensure that reed is adjusted to predetermined correct position.
Refer to shown in Fig. 1 to Fig. 6, the adjustment mechanism also includes being used for the relay power supply for carrying supporting region 2
Test component 27, test component 27 include being movably arranged on test in frame 1 it is first 28, with testting first 28 confessions being electrically connected with
Power supply (not shown), the fourth drive member 29 for driving first 28 movement of test.Relay is placed on supporting region 2 it
Afterwards, first 28 movement of the driving of fourth drive member 29 test, and then cause test first 28 to contradict the power supply terminal of turn-on relay, then
Power supply source is powered to relay, and then is realized and relay is test to determine whether reed adjusts OK.
Above content is only presently preferred embodiments of the present invention, for one of ordinary skill in the art, according to the present invention's
Thought, there will be changes, this specification content should not be construed as to the present invention in specific embodiments and applications
Limitation.
Claims (10)
1. a kind of adjustment mechanism for relay spring, including frame, being arranged at the adjustment component of frame, frame, which is provided with, to be used for
The supporting region of relay is carried, adjustment component is used for the reed for adjusting the relay that supporting region is carried；It is characterized in that：It is described
Adjustment component includes being slideably positioned in the first actuator of frame, held for the first actuator of driving closer or far from supporting region
Second actuator of the relay of load, the adjustment part set is rotated, the first actuator is used to drive adjustment part to rotate, and adjustment part is set
There is the fluting for being installed with reed.
2. the adjustment mechanism according to claim 1 for relay spring, it is characterised in that：The adjustment component also wraps
The first saddle for being slideably positioned in frame is included, the second actuator is used to drive what the first saddle was carried closer or far from supporting region
Relay, the first actuator are installed in the first saddle, and adjustment part rotates and is arranged at the first saddle.
3. the adjustment mechanism according to claim 2 for relay spring, it is characterised in that：The adjustment component also wraps
Dial and indication piece are included, dial is installed in the first saddle or/and the first actuator, and indication piece is installed in adjustment part, instruction
Part is used for the scale of indication dial disc.
4. the adjustment mechanism according to claim 2 for relay spring, it is characterised in that：The adjustment part includes turning
Bar and adjustment head, bar rotation are arranged at the first saddle, and the first actuator is used to drive bar rotation, and the one end for adjusting head is removable
It is connected to bull stick with unloading, fluting is arranged at the other end of adjustment head, and the end face of the other end for self-adjusting head of slotting is recessed to be formed.
5. the adjustment mechanism according to claim 1 for relay spring, it is characterised in that：The adjustment mechanism also wraps
Include and be arranged at for relay to be positioned to the positioning component of supporting region, positioning component including being installed in the block of frame, rotating
The movable block of frame, for driving threeth actuator of the movable block closer or far from block, block, movable block, which are used to clamp, to be carried
The relay that area is carried.
6. the adjustment mechanism according to claim 5 for relay spring, it is characterised in that：The movable block includes this
Body portion and the clamping part being connected with body, block, clamping part are used to clamp the relay that supporting region is carried, and the one of body
End rotation is arranged at frame, and the first elastic component is provided between the other end and frame of body, and the first elastic component is used to drive work
Motion block resets, and the output end of the 3rd actuator is used for the other end for contradicting body.
7. the adjustment mechanism according to claim 6 for relay spring, it is characterised in that：The positioning component also wraps
Include the second saddle, the second elastic component being installed between the second saddle and body for being slideably positioned in body, the second saddle
Relay is positioned at supporting region by the relay carried for contradicting supporting region, block, clamping part, the second saddle jointly, the
Two elastic components are used to drive the second saddle to reset.
8. the adjustment mechanism according to claim 6 for relay spring, it is characterised in that：The positioning component also wraps
Impeller is included, one end of impeller is connected with the output end of the 3rd actuator, and the other end of impeller is provided with the prominent of bending extension
Block portion, projection portion are used for the other end for contradicting movable block.
9. the adjustment mechanism according to claim 1 for relay spring, it is characterised in that：The adjustment mechanism also wraps
Displacement detecting component is included, displacement detecting component is used for the displacement for detecting the reed of adjustment component adjustment, displacement detecting component bag
Include the displacement transducer for being arranged at frame and the light emitters coordinated with displacement transducer, the detection light that light emitters are sent
Line exposes to reed to be adjusted and is reflected back displacement transducer.
10. the adjustment mechanism according to claim 1 for relay spring, it is characterised in that：The adjustment mechanism is also
Include the test component of the relay power supply for being carried to supporting region, test component includes being movably set in the test of frame
Head, the power supply source being electrically connected with test head, the fourth drive member for driving test head movement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710964929.XA CN107622913B (en) | 2017-10-17 | 2017-10-17 | A kind of adjustment mechanism for relay spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710964929.XA CN107622913B (en) | 2017-10-17 | 2017-10-17 | A kind of adjustment mechanism for relay spring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107622913A true CN107622913A (en) | 2018-01-23 |
| CN107622913B CN107622913B (en) | 2019-07-16 |
Family
ID=61092193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710964929.XA Active CN107622913B (en) | 2017-10-17 | 2017-10-17 | A kind of adjustment mechanism for relay spring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107622913B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108447736A (en) * | 2018-03-26 | 2018-08-24 | 三友联众集团股份有限公司 | A kind of automatic adjusting machine for relay |
| CN113314384A (en) * | 2021-04-14 | 2021-08-27 | 厦门锐大自动化设备有限公司 | Relay movable spring equipment of bending |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB734490A (en) * | 1951-03-09 | 1955-08-03 | Telephone Mfg Co Ltd | Improvements in and relating to the adjustment of electrical contact springs |
| CN104124106A (en) * | 2014-07-21 | 2014-10-29 | 哈尔滨工业大学 | Relay capable of adjusting mechanical parameters and device and method for measuring fusion welding force of relay |
| CN105070595A (en) * | 2015-07-29 | 2015-11-18 | 东莞市三友联众电器有限公司 | Relay parameter automatic adjustment device |
| CN105845506A (en) * | 2016-05-25 | 2016-08-10 | 苏州博众精工科技有限公司 | Over-travel parameter setting apparatus of relay |
| CN207398024U (en) * | 2017-10-17 | 2018-05-22 | 三友联众集团股份有限公司 | A kind of adjustment mechanism for relay spring |
-
2017
- 2017-10-17 CN CN201710964929.XA patent/CN107622913B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB734490A (en) * | 1951-03-09 | 1955-08-03 | Telephone Mfg Co Ltd | Improvements in and relating to the adjustment of electrical contact springs |
| CN104124106A (en) * | 2014-07-21 | 2014-10-29 | 哈尔滨工业大学 | Relay capable of adjusting mechanical parameters and device and method for measuring fusion welding force of relay |
| CN105070595A (en) * | 2015-07-29 | 2015-11-18 | 东莞市三友联众电器有限公司 | Relay parameter automatic adjustment device |
| CN105845506A (en) * | 2016-05-25 | 2016-08-10 | 苏州博众精工科技有限公司 | Over-travel parameter setting apparatus of relay |
| CN207398024U (en) * | 2017-10-17 | 2018-05-22 | 三友联众集团股份有限公司 | A kind of adjustment mechanism for relay spring |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108447736A (en) * | 2018-03-26 | 2018-08-24 | 三友联众集团股份有限公司 | A kind of automatic adjusting machine for relay |
| CN113314384A (en) * | 2021-04-14 | 2021-08-27 | 厦门锐大自动化设备有限公司 | Relay movable spring equipment of bending |
| CN113314384B (en) * | 2021-04-14 | 2024-05-14 | 厦门锐大自动化设备有限公司 | Relay movable spring bending equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107622913B (en) | 2019-07-16 |
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