CN206305249U - A kind of swing type bending mechanism - Google Patents

A kind of swing type bending mechanism Download PDF

Info

Publication number
CN206305249U
CN206305249U CN201621363167.5U CN201621363167U CN206305249U CN 206305249 U CN206305249 U CN 206305249U CN 201621363167 U CN201621363167 U CN 201621363167U CN 206305249 U CN206305249 U CN 206305249U
Authority
CN
China
Prior art keywords
plate
punching pin
shaping punching
son
clamping plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201621363167.5U
Other languages
Chinese (zh)
Inventor
骆兴顺
钱晓晨
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzhou Helin Micro Technology Co., Ltd
Original Assignee
Suzhou Helin Micro-Nano Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Suzhou Helin Micro-Nano Technology Co Ltd filed Critical Suzhou Helin Micro-Nano Technology Co Ltd
Priority to CN201621363167.5U priority Critical patent/CN206305249U/en
Application granted granted Critical
Publication of CN206305249U publication Critical patent/CN206305249U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

The utility model discloses a kind of swing type bending mechanism, the bending mechanism includes cooperating and does the upper die plate and lower template of open and close movement, clamping plate is fixedly installed on upper die plate successively, the back of the body de- plate and stripper plate, clamping plate is provided with clamping plate and enters son, it is provided with to take off on stripper plate and expects into son, a shaping punching pin being driven by drift is additionally provided with upper die plate, shaping punching pin sequentially passes through clamping plate, the back of the body de- plate and stripper plate, a modulator block and lower mould bent insert are fixedly installed in lower template, workpiece to be added is placed between stripper plate and lower mould bent insert, shaping punching pin is moved downward under the driving of drift, shaping punching pin is in contact with adjustment block, shaping punching pin be adjusted block side force swing to the left so that drives be molded punching pin carry out 90 degree of bendings to machined part.The processing cost of workpiece to be added is reduced using the swing type bending mechanism, it is to avoid the frequent displacement of existing structure punching pin, the bending and molding for solving existing structure is unstable and improve the convenience of maintenance.

Description

A kind of swing type bending mechanism
Technical field
The utility model is related to machinery manufacturing technology field, and in particular to a kind of swing type bending mechanism.
Background technology
Bending is the positive and negative in same sheet material while there is the deformation of tensile stress and compression stress, sheet material is arrived in bending After angle on target, due to the effect of tensile stress and compression stress after plus-pressure is removed, material will have and be returned to originally The bounce-back of shape, this bounce-back is referred to as bending bounce-back.The amount of bending resilience typically represents that this amount will be by material with angle The influence of the conditions such as matter, thickness of slab, plus-pressure, radius bend.Because folding gulf power is very big, the tonnage of the lathe must also increase, Die wear is increased, and mould can only use pressure-resistant mould higher.
In machinery industry, Bending Processing is carried out to sheet metal component commonly using stamping die, the flanging after bending is generally all deposited In a certain degree of bending resilience, cause bending angle unqualified.When required sheet metal component bending angle is more than 90 degree, can Many certain angles are directly rolled over for compensating bending resilience, so as to ensure that bending angle is qualified;However, when required sheet metal component folding When bending angle is 90 degree, it is desirable to roll over many certain angles for compensating bending resilience, then sheet metal component bending angle now is actually subjected to Less than 90 degree, that is, need to carry out negative angle bending to sheet metal component, just can guarantee that bending angle is qualified.Conventional sheet metal component negative angle bending Mode is mostly that, by two sets of stamping dies, by first latter two operation, could complete negative angle bending, and then reach compensation bending to return Bullet ensures the qualified purpose of bending angle.Using the conventional wrap direction, though negative angle bending can be completed, compensation bending resilience is reached Ensure the qualified purpose of bending angle, but need two molds, two operations, not only die cost is high, and manufacturing procedure is more.
Existing 90 degree of wrap directions bending in two steps, first pre-folds one 45 degree, then 90 degree of bendings is being molded, to improve folding Curved stability.As shown in figure 1, traditional bending mechanism includes that punching pin 100, lower mould enter son 200, take off and expect into son 300, workpiece to be added 400 are placed on lower mould enters son 200 and takes off to expect between sub 300, and traditional wrap direction increased die length, correspondingly also increase Die cost, produces bending unstable after punching pin 100 and lower mould enter the abrasion of son 200, and modulation bending angle need to add and subtract punching pin 100 and lower mould enter son 200 wall thickness, cause maintenance it is extremely inconvenient.
The content of the invention
The purpose of this utility model is exactly, in order to solve the above-mentioned problems in the prior art, to propose a kind of maintenance side Just it is, simple to operate, it is possible to resolve a kind of unstable swing type bending mechanism of bending and molding.
The purpose of this utility model is achieved through the following technical solutions:A kind of swing type bending mechanism, including phase interworking The upper die plate and lower template of open and close movement are done in conjunction, and the upper die plate includes clamping plate, the back of the body de- plate and stripper plate, set on the clamping plate There is clamping plate to enter son, be provided with the stripper plate it is de- expect into son, one is additionally provided with the upper die plate and is driven by drift Shaping punching pin, the shaping punching pin sequentially passes through the clamping plate, the back of the body de- plate and stripper plate, and one is fixedly installed in the lower template Modulator block and lower mould bent insert, are placed with workpiece to be added, the shaping punching between the stripper plate and the lower mould bent insert Son is moved downward under the driving of the drift, and the shaping punching pin is in contact with the adjustment block, and the shaping punching pin is subject to The side force of the adjustment block swing to the left so that drive it is described shaping punching pin 90 degree of bendings are carried out to the workpiece to be added.
Preferably, the adjustment block is pasted with the pad of an optional thickness relative to the side of the lower mould bent insert, It is 0.1mm ~ 0.15mm that the thickness range of the pad is interval.
Preferably, the adjustment block is provided with an inclined-plane with the side of the stamp punching pin, and two inclined-planes are oppositely arranged, The stamp punching pin is moved downward under the driving of the drift and contacts the oblique of the stamp punching pin with adjustment block generation face Angle mutually suits with the oblique angle of the modulator block.
Preferably, a fixed mechanism is additionally provided with the clamping plate, the fixed mechanism includes pressing plate and plate screw, institute State and offer the screw worn for the plate screw on clamping plate and the pressing plate.
Preferably, when the upper module is mold closing state with the lower module, the back of the body takes off plate, the stripper plate, institute State to take off and expect to be moved downward into son, the pressing plate, the plate screw, the clamping plate enter sub, described shaping punching pin and move downward, when When the stripper plate touches the lower template, the fixed mechanism, the clamping plate enter sub, described shaping punching pin and continue fortune downwards It is dynamic, the shaping punching pin from it is described it is de- expect to be stretched out into the inside of son, the adjustment block provides one tiltedly to the shaping punching pin Swing and then drive the shaping punching pin to the left to the power driving shaping punching pin carries out 90 degree of bendings to the workpiece to be added.
Preferably, when the upper module is die opening state with the lower module, the fixed mechanism, the clamping plate enter son After driving the shaping punching pin to move and walked LAP upwards, so drive the de- plate of the stripper plate, the back of the body, it is de- expect into son to Upper motion, the upper die plate and lower template are separated.
Preferably, it is described shaping punching pin and it is described it is de- expect son between be provided with gap, the shaping punching pin and the clamping plate Gap is provided between entering son.
Preferably, one is provided with above the adjustment block and the pad for fixed screw, the screw is T The hexagon socket head cap screw of font.
Preferably, the top of the shaping punching pin is semicircle, and the contact that the shaping punching pin enters son with the clamping plate is Face contacts.
The advantage of technical solutions of the utility model is mainly reflected in:Mould is shortened using the swing type bending mechanism long Degree, reduces the processing cost of workpiece to be added, it is to avoid the frequent displacement of existing structure punching pin, and bending angle is easily adjusted, and saves Repair a die the time, solve existing structure bending and molding it is unstable and improve maintenance convenience.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model prior art bending mechanism;
Fig. 2 is the structural representation of the utility model swing type bending mechanism;
Fig. 3 is the structural representation of the utility model workpiece to be added;
Fig. 4 is the structural representation that the utility model workpiece to be added bends 90 degree.
Specific embodiment
The purpose of this utility model, advantage and feature, will carry out figure by the non-limitative illustration of preferred embodiment below Show and explain.These embodiments are only the prominent examples for applying technical solutions of the utility model, all to take equivalent or wait Effect conversion and the technical scheme that is formed, all fall within the utility model it is claimed within the scope of.
As shown in Fig. 2 the upper die plate 1 and lower template of open and close movement are done in a kind of swing type bending mechanism, including mutual cooperation 2, the upper die plate includes clamping plate 3, the back of the body de- plate 4 and stripper plate 5, clamping plate is provided with the clamping plate 3 and enters son 31, the stripper plate It is provided with to take off on 5 and expects, into son 51, a shaping punching pin 6 being driven by drift, the shaping to be additionally provided with the upper die plate 1 Punching pin 7 sequentially passes through the clamping plate 3, the back of the body de- plate 4 and stripper plate 5, be fixedly installed in the lower template 2 modulator block 21 and under Mould bent insert 22, is placed with workpiece to be added 7 between the stripper plate 5 and the lower mould bent insert 22, the shaping punching pin 6 exists Moved downward under the driving of the drift, the shaping punching pin is in contact with the adjustment block 21, the shaping punching pin 6 is subject to institute State adjustment block 21 side force swing to the left so that drive it is described shaping the workpiece to be added 7 of punching pin 6 pairs carry out 90 degree of bendings.
As shown in Fig. 2 the adjustment block 21 is pasted with an optional thickness relative to the side of the lower mould bent insert 22 Pad 23, the thickness range of the pad 23 is interval is 0.1mm ~ 0.15mm, and the thickness of thin of the pad can be with thick not In the present embodiment, the thickness of the pad 23 is preferably 0.1mm to row, and the amount that the pad 23 is adjusted as needed adds and subtracts it The thickness of itself, when the mechanism can open the folding for modulating the workpiece to be added by changing the thickness of the pad in the course of the work Bending angle, has prevented when without 45 degree of unstability of 90 degree of the direct bending that pre-bends.The adjustment block 21 and the stamp punching pin 6 Side be provided with an inclined-plane, and two inclined-planes are oppositely arranged, and the stamp punching pin 6 is moved downward under the driving of the drift Mutually suit with the oblique angle that the generation face of the adjustment block 21 contacts the stamp punching pin 6 and the oblique angle of the modulator block 21.The tune Monoblock 21 does 30 degree ~ 45 degree oblique angles, convenient adjustment and correcting with the shaping contact portion of punching pin 6, in the present embodiment, described Adjustment block 21 does 30 degree of oblique angles with the shaping contact portion of punching pin 6.
As shown in Fig. 2 being additionally provided with a fixed mechanism 8 on the clamping plate 3, the fixed mechanism 8 includes pressing plate 81 and pressure The screw worn for the plate screw, the fixed machine are offered on plate screw 82, the clamping plate 3 and the pressing plate 81 The setting of structure 8 enters son 31 and the shaping punching pin 6 for fixing the clamping plate, and when die sinking and mold closing, the clamping plate enters sub 31 Will not be shaken with the shaping punching pin 6 and then the final molding to the workpiece to be added is impacted.
It is the pressing plate 81 and institute by the fixed mechanism after shaping punching pin 6 and the clamping plate enter son 31 to be coordinated Plate screw 82 is stated to be fixed on the clamping plate 3, it is described it is de- expect into it is packaged enter the stripper plate, the shaping punching pin and the folder Plate enter it is sub and it is described it is de- expect into the unilateral gap for having 0.02 ~ 0.04mm of block, the big I in the gap is according to material is thick and bending angle Tolerance values determine.
The structural representation of workpiece to be added 7 is illustrated in figure 3, the length L of the workpiece to be added is 6.60mm, described to be added The width W of workpiece is 2.0mm.It is illustrated in figure 4 workpiece to be added and bends the structural representation after 90 degree, the bending angle of workpiece to be added Degree θ is 90 degree, and the bending length L1 of workpiece to be added is 2mm, and the thickness D of workpiece to be added is 0.2mm, the circle of workpiece bending to be added Arc radius are R, and the value of arc radius R is 0.40.During mould is descending, the stripper plate 5 compresses described to be processed Part 7, mould is continued traveling downwardly and drives the shaping punching pin 6 descending, after being contacted with the adjustment block 21, due to the shaping punching pin 6 Top be 1/2R.Can be swung to the left when after side force of the shaping punching pin 6 by adjustment block, so that negative angle shaping is completed, When profile angle is more than 90 degree, the modulation pad 23 can be increased in the side of the adjustment block, force the shaping punching pin The amplitude for swinging to the left is more greatly reaching the purpose of adjustment angle.It is described shaping punching pin 6 and it is described it is de- expect son 51 between be provided with Gap, the gap is 0.02 ~ 0.04mm, and it is movable that the gap can make the shaping punching pin 6 carry out left and right in punching course;It is described into Type punching pin 6 and the clamping plate are provided with gap between entering son 31, and the gap is 0.02 ~ 0.04mm, and the gap can make the shaping punching Son carries out left and right activity in punching course.One is provided with for fixed spiral shell in the top of the adjustment block 21 and the pad 23 Silk 9, the screw 9 is the hexagon socket head cap screw of T fonts, and the setting of the screw can push down the adjustment block 21 and the pad 23, when die sinking and mold closing, the adjustment block and the pad will not be rocked.The top of the shaping punching pin is semicircle, institute State shaping punching pin and enter the contact of son for face contacts with the clamping plate.
The course of work:When the upper module is mold closing state with the lower module, the back of the body takes off plate, the stripper plate, It is described it is de- expect to be moved downward into son, it is described it is de- expect into son herein to the stamp punching pin play a part of be oriented to and adjust, institute State pressing plate, the plate screw, the clamping plate and enter sub, described shaping punching pin and move downward, when the stripper plate touch it is described During lower template, the fixed mechanism, the clamping plate enter sub, described shaping punching pin to be continued to move downward, described to be molded punching pin from institute State to take off and expect to be stretched out into the inside of son, the adjustment block provides a skew force and drives the shaping punching pin to the shaping punching pin Swing and then drive the shaping punching pin to the left carries out 90 degree of bendings to the workpiece to be added.
When the upper module is die opening state with the lower module, the fixed mechanism, the clamping plate enter the dynamic institute of subband State after shaping punching pin moves and walked LAP upwards, and then drive the de- plate of the stripper plate, the back of the body, de- expect into sub fortune upwards Dynamic, the upper die plate and lower template are separated.
A kind of processing method of swing type bending mechanism, comprises the following steps:
S1, compaction step, are placed in workpiece to be added between stripper plate and lower mould bent insert first, carry out to machined part It is fixed;
S2, actuation step, the drift shaping punching pin interlocked with it that works and drive are descending, and then drive the shaping punching pin Be in contact with the adjustment block, when the stripper plate touches the lower template, the fixed mechanism, the clamping plate enter son, The shaping punching pin continues to move downward in the presence of drift;
S3, bending step, the shaping punching pin in the presence of drift from it is described it is de- expect into son the inside stretch out, drive institute State adjustment block and provide skew force to the shaping punching pin, the shaping punching pin is swung to the left, complete to the workpiece to be added 90 degree of bendings;
S4, trim step, after S3 steps terminate, at this moment the bending angle to the workpiece to be added judges, such as institute The bending angle of workpiece to be added is stated more than 90 degree, the adjust pad for adjusting is placed in the side of adjustment block, in bending process Middle adjust pad can force shaping punching pin to do the amplitude for swinging bigger bending angle to machined part to the left and be adjusted.
Die length is shortened using the swing type bending mechanism, reduce the processing cost of workpiece to be added, it is to avoid be existing There is the frequent displacement of structure punching pin, bending angle is easily adjusted, saving repairs a die the time, the bending and molding for solving existing structure is unstable Convenience that is fixed and improving maintenance.
It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and And in the case of without departing substantially from spirit and essential characteristics of the present utility model, can in other specific forms realize that this practicality is new Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new The scope of type limits by appended claims rather than described above, it is intended that the equivalency fallen in claim is contained All changes in justice and scope are included in the utility model, any reference in claim should not be considered as into limitation Involved claim.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each implementation method is only wrapped Containing an independent technical scheme, this narrating mode of specification is only that for clarity, those skilled in the art should Specification an as entirety, the technical scheme in each embodiment can also be formed into those skilled in the art through appropriately combined May be appreciated other embodiment.

Claims (9)

1. a kind of swing type bending mechanism, including mutual cooperation does the upper die plate and lower template of open and close movement(2), its feature exists In:The upper die plate includes clamping plate(3), the de- plate of the back of the body(4)And stripper plate(5), the clamping plate(3)On be provided with clamping plate and enter son (31), the stripper plate(5)On be provided with and de- expect into son(51), the upper die plate(1)On be additionally provided with one and driven by drift Dynamic shaping punching pin(6), the shaping punching pin(6)Sequentially pass through the clamping plate(3), the de- plate of the back of the body(4)And stripper plate(5), it is described Lower template(2)On be fixedly installed an adjustment block(21)With lower mould bent insert(22), the stripper plate(5)Rolled over the lower mould It bend into son(22)Between be placed with workpiece to be added(7), the shaping punching pin(6)Moved downward under the driving of the drift, it is described Shaping punching pin(6)With the adjustment block(21)It is in contact, the shaping punching pin(6)By the adjustment block(21)Side force to Left swing is dynamic and then drives the shaping punching pin(6)To the workpiece to be added(7)Carry out 90 degree of bendings.
2. a kind of swing type bending mechanism according to claim 1, it is characterised in that:The adjustment block(21)Relative to institute State lower mould bent insert(22)Side be pasted with the pad of an optional thickness(23), the pad(23)Thickness range it is interval It is 0.1mm ~ 0.15mm.
3. a kind of swing type bending mechanism according to claim 1, it is characterised in that:The adjustment block(21)With it is described into Type punching pin(6)Side be provided with an inclined-plane, and two inclined-planes are oppositely arranged, the shaping punching pin(6)In the drive of the drift Moved downward and the adjustment block under dynamic(21)Generation face contacts the shaping punching pin(6)Oblique angle and the adjustment block(21)'s Oblique angle mutually suits.
4. a kind of swing type bending mechanism according to claim 1, it is characterised in that:The clamping plate(3)On be additionally provided with One fixed mechanism(8), the fixed mechanism(8)Including pressing plate(81)And plate screw(82), the clamping plate(3)With the pressing plate (81)On offer the screw worn for the plate screw.
5. a kind of swing type bending mechanism according to claim 4, it is characterised in that:When the upper die plate and the lower mould Plate(2)During for mold closing state, the back of the body takes off plate(4), the stripper plate(5), it is described de- to expect into son(51)Move downward, the pressure Plate(81), the plate screw(82), the clamping plate enter son(31), the shaping punching pin(6)Move downward, when the stripper plate (5)Touch the lower template(2)When, the fixed mechanism(8), the clamping plate enter son(31), the shaping punching pin(6)Continue Move downward, the shaping punching pin(6)De- expect into son from described(51)The inside is stretched out, the adjustment block(21)Rushed to the shaping Son(6)The shaping punching pin is driven to swing to the left and then drive the shaping punching pin there is provided a skew force(6)Treated to described Workpiece carries out 90 degree of bendings.
6. a kind of swing type bending mechanism according to claim 1 or claim 4, it is characterised in that:When the upper mould Plate and the lower template(2)During for die opening state, the fixed mechanism(8), the clamping plate enter son(31)Drive the shaping punching Son(6)After moving and walked LAP upwards, and then drive the stripper plate(5), the de- plate of the back of the body(4), de- expect into son(51)To Upper motion, the upper die plate(1)And lower template(2)Separate.
7. a kind of swing type bending mechanism according to claim 1, it is characterised in that:The shaping punching pin(6)With it is described It is de- to expect into son(51)Between be provided with gap, the shaping punching pin(6)Enter son with the clamping plate(31)Between be provided with gap.
8. a kind of swing type bending mechanism according to claim 2, it is characterised in that:In the adjustment block(21)With it is described Pad(23)Top be provided with one for fixed screw(9), the screw is the hexagon socket head cap screw of T fonts.
9. a kind of swing type bending mechanism according to claim 1, it is characterised in that:The shaping punching pin(6)Top It is semicircle, the shaping punching pin(6)Enter son with the clamping plate(31)Contact be face contact.
CN201621363167.5U 2016-12-13 2016-12-13 A kind of swing type bending mechanism Active CN206305249U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201621363167.5U CN206305249U (en) 2016-12-13 2016-12-13 A kind of swing type bending mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201621363167.5U CN206305249U (en) 2016-12-13 2016-12-13 A kind of swing type bending mechanism

Publications (1)

Publication Number Publication Date
CN206305249U true CN206305249U (en) 2017-07-07

Family

ID=59252286

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201621363167.5U Active CN206305249U (en) 2016-12-13 2016-12-13 A kind of swing type bending mechanism

Country Status (1)

Country Link
CN (1) CN206305249U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106734408A (en) * 2016-12-13 2017-05-31 苏州和林微纳科技有限公司 A kind of swing type bending mechanism and its processing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106734408A (en) * 2016-12-13 2017-05-31 苏州和林微纳科技有限公司 A kind of swing type bending mechanism and its processing method

Similar Documents

Publication Publication Date Title
CN103521622B (en) A kind of ultrahigh-strength steel plates hat section part punching manufacturing process
CN202893995U (en) Device for solving bending and resilience of sheet metal part
CN103831335B (en) A kind of high-tension plate forming device
CN202725696U (en) One-step forming titanium alloy plate bending mechanism
CN204381209U (en) The diel of side-wall outer-plate
CN206009593U (en) A kind of pair of slip Bending Mould
CN102921807A (en) Novel drawing die
CN206305249U (en) A kind of swing type bending mechanism
CN106734408A (en) A kind of swing type bending mechanism and its processing method
CN203002958U (en) Vehicle side body drawing die capable of preventing yawing force from producing
CN107186081A (en) One kind is used for Rear cover inner mould
CN205571066U (en) Rotatory crimp mechanism
CN206794528U (en) Bao Gang sides stamping die for shaping after a kind of automobile
CN105537399A (en) Novel four-direction wedge die mechanism and using method thereof
CN204412917U (en) A kind ofly be applicable to the upwards shaping modified node method of high-speed stamping die
CN201799525U (en) Die with tapered wedge
CN201684840U (en) Punching die capable of finely adjusting punch of die
CN106140999A (en) A kind of multi link edge covering mechanism being applied to aluminium alloy door closure bound edge
CN102825111A (en) Fast molding mechanism for negative angle of die processing product
CN202934027U (en) Continuous punching and shaping die for porous products
CN107552647A (en) A kind of part swaging device
CN205362474U (en) Mechanism is dodged to tong
CN204975172U (en) A cold mould of passing through many hands or places of putting for producing trapezoidal terminal surface tooth meshing cover has
CN208600576U (en) A kind of two times punch mold for the forming of zigzag shape beam piece
CN203304420U (en) Die for bending molding of tube parts of vehicle body

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CP03 Change of name, title or address

Address after: 215000 Emei Mountain Road, 80 hi tech Zone, Jiangsu, Suzhou

Patentee after: Suzhou Helin Micro Technology Co., Ltd

Address before: 215000 Emei road 80, hi tech Zone, Suzhou, Jiangsu, Suzhou

Patentee before: Suzhou Helin Micro-Nano Technology Co., Ltd.

CP03 Change of name, title or address