CN202461218U - Electro-hydraulic servo single cylinder bending machine - Google Patents
Electro-hydraulic servo single cylinder bending machine Download PDFInfo
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- CN202461218U CN202461218U CN2012200567564U CN201220056756U CN202461218U CN 202461218 U CN202461218 U CN 202461218U CN 2012200567564 U CN2012200567564 U CN 2012200567564U CN 201220056756 U CN201220056756 U CN 201220056756U CN 202461218 U CN202461218 U CN 202461218U
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- oil cylinder
- axle bed
- slide plate
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Abstract
The utility model discloses an electro-hydraulic servo single cylinder bending machine. The bending machine comprises a rack, a sliding plate, a rear stop device, moulds, left and right protection doors, a rear protection door, a numerical control system, an electric box, a suspension arm, a foot switch, a grating, a hydraulic system, an oil pump motor and an oil cylinder, wherein the rear stop device is installed in the rack and comprises stop fingers, an R axle lifting seat and an X axle seat; the stop fingers are installed on a Z axle slider; the R axle lifting seat is installed on an axle seat sliding plate; and the X axle seat is installed on channel steel of the rack. The bending machine uses the simplest universal moulds to carry out straight-line bending at all angles on small sheets, is simple to operate and has good universality; moreover, the moulds are low in cost and can be changed conveniently.
Description
Technical field
The utility model relates to a kind of bender, relates in particular to a kind of electro-hydraulic servo single cylinder bender.
Background technology
The weak point of original little tonnage electro-hydraulic servo bender: 1) speed is lower, and labor productivity is not high.Migration velocity is between 100～150mm/s, and pressing speed is between 8～12mm/s, and return speed is between 80～130mm/s; 2) the process oil temperature is higher, and there have to be overheated, the phenomenon of leakage; 3) in operation, noise is higher all the time for oil pump in the bending process, and energy consumption is big.
Electronic industry develop rapidly now, various communication converter tools are of a great variety, and output is huge.As: various palmtop computers: Game boy, PSP, NDSL, GBA; All kinds of mobile phones: economical mobile phone, commercial type mobile phone, intelligent mobile phone, the type of taking pictures mobile phone, entertaining mobile phone, music type mobile phone etc.These electronic product shell all have common characteristic: all be thin thickness, and the little plate of appearance and size (length and width), bending precision requires high.
The utility model content
The purpose of the utility model is to solve the problems of the prior art, provides a kind of stable working reliable, easy to operate electro-hydraulic servo single cylinder bender.
The technical scheme of the utility model is: electro-hydraulic servo single cylinder bender comprises frame, slide plate, rear material stopping device, mould, left and right sides protective door, back protective door, digital control system, electronic box, arm, floor push, grating chi, hydraulic system, Oil pump electrical machinery, oil cylinder; Said frame adopts the steel plate structure that is welded as a whole; Fuel tank, oil cylinder installing plate and channel-section steel are welded between the left and right sides riser; Above the left and right sides riser, be welded with hanger, the under-chassis plate is welded on left and right sides riser below, on the riser of right side, is connected with C shape plate; The workbench riser is through being connected on the frame behind the skewback adjustment height up and down, and workbench and preceding material supporting rack are connected on the workbench riser; Oil cylinder is installed on the oil cylinder installing plate, and the oil cylinder piston bar links to each other with slide plate, and slide block is connected on the oil cylinder installing plate; Line slideway is connected on the slide plate, and the oil cylinder cover is connected on the slide plate, and slide plate moves up and down through flexible, the line slideway and the slider guide of oil cylinder piston bar; Mould comprises upper die and lower die, and patrix joins with slide plate through the fast folder of rotary spanner, and counterdie and die holder, die-cushion aggregate erection are on worktable panel; Said rear material stopping device is installed in the frame, and rear material stopping device comprises that retaining refers to, R axle elevating bracket and X axle bed, keeps off referring to be installed on the Z axle slide block; Said R axle elevating bracket is installed on the axle bed slide plate, and said X axle bed is installed on the channel-section steel of frame.
Said R axle elevating bracket comprises interior seat, outer seat, crossbeam, first servomotor, be connected Z axle line slideway on the crossbeam, be installed on the seat R axle slide block and ball-screw and be installed in R axle line slideway and the ball-screw nut on outer; Said crossbeam is installed on the outer seat.
Said X axle bed comprises axle bed, second servomotor, line slideway and slide block, ball-screw and nut, axle bed slide plate; Said line slideway is connected on the axle bed, and ball-screw is installed on the axle bed and with said servomotor through bearing block and bearing and joins, and the axle bed slide plate of axle bed is connected with slide block, nut seat, and nut seat links to each other with ball-screw nut.
The utility model carries out the straight-line bending of various angles with the simplest universal mold to small-sized thin plate, and simple to operate, versatility is good; Die cost is low, and it is convenient to change, and machine itself has only basic exercise rectilinear motion up and down reciprocatingly; To the how curved workpiece of a small-sized thin plate, according to the program of setting, the bending function adjusts ram travel automatically and the backstop material level is put; And setting-up time, whole bending operations of a part are carried out automatically continuously, and numerical control bender all has the direct programing function of angle; As long as the several data of input through once examination folding and correction, can be accomplished adjustment work.
Description of drawings
Fig. 1 is axis side views 1 such as the utility model electro-hydraulic servo single cylinder bender;
Fig. 2 is axis side views 2 such as the utility model electro-hydraulic servo single cylinder bender;
Fig. 3 is axis side views such as the utility model electro-hydraulic servo single cylinder bender frame;
Fig. 4 is the utility model electro-hydraulic servo single cylinder bender vertical view;
Fig. 4 a is the A-A cutaway view of Fig. 4;
Fig. 4 b is the B-B cutaway view of Fig. 4;
Fig. 5 is the scheme of installation of rear material stopping device in the utility model;
Fig. 5 a is the composition sketch map of rear material stopping device in the utility model;
Fig. 5 b is the composition sketch map of X axle bed in the utility model;
Fig. 5 c is the rearview of R axle elevating bracket in the utility model;
Fig. 5 d is the cutaway view C-C of R axle elevating bracket in the utility model;
Fig. 6 is the composition sketch map of digital control system and electric component in the utility model;
Fig. 7 is the composition sketch map of hydraulic system, Oil pump electrical machinery and oil cylinder in the utility model;
Fig. 8 is the fundamental diagram of the utility model;
Shown in Figure 9 is the hydraulic schematic diagram of the utility model.
The specific embodiment
Understand for technological means, technical characterictic, utility model purpose and the technique effect that the utility model is realized is easy to understand,, further set forth the utility model below in conjunction with concrete diagram.
Like Fig. 1, Fig. 2 and shown in Figure 7; The utility model electro-hydraulic servo single cylinder bender mainly comprises frame 1, slide plate 2, rear material stopping device 3, mould 4, left and right sides protective door 5, back protective door 6, digital control system 7, electronic box 7a, arm 7b, floor push 7c, grating chi 7d, hydraulic system 8, Oil pump electrical machinery 8a, oil cylinder 8b; As shown in Figure 3, frame 1 adopts welded-steel plate construction, and fuel tank 1a, oil cylinder installing plate 1b and channel-section steel 1c are welded between the left and right sides riser 1d; Pump adpting flange 1l is welded on the fuel tank 1a; Hanger 1e is welded on left and right sides riser 1d top, and under-chassis plate 1f is welded on left and right sides riser 1d below, and C shape plate 1g is connected on the riser of right side; Workbench riser 1h is through being connected on the frame 1 behind the skewback 1i adjustment height up and down, and workbench 1j and material frame 1k are connected on the workbench riser 1h.
Shown in Fig. 4, Fig. 4 a and Fig. 4 b; Oil cylinder 8b is installed on the oil cylinder installing plate 1b; Oil cylinder piston bar 8c links to each other with slide plate 2, and slide block 2a is connected on the oil cylinder installing plate 1b, and line slideway 2b is connected on the slide plate 2; Oil cylinder cover 2c is connected on the slide plate 2, and slide plate 2 leads with slide block 2a and moves up and down through flexible, the line slideway 2b of oil cylinder piston bar 8c; Mould 4 comprises patrix 4a and counterdie 4b, and patrix 4a presss from both sides 4c soon through rotary spanner and slide plate 2 joins, and counterdie 4c and die holder, die-cushion aggregate erection are on workbench 1j.
Shown in Fig. 5 and Fig. 5 a, rear material stopping device 3 is installed in the frame 1, mainly refers to that by retaining 3c, R axle elevating bracket 3b and X axle bed 3a form.
Shown in Fig. 5 and Fig. 5 b, X axle bed 3a is installed on the channel-section steel 1c of frame, mainly is made up of the first servomotor 3d, axle bed 3e, line slideway 3f and slide block 3g, ball-screw 3h and nut 3i, axle bed slide plate 3j; Line slideway 3f is connected on the axle bed 3e, and ball-screw 3h is installed on the axle bed 3e through bearing block 3k and bearing, and axle bed slide plate 3j is connected with slide block 3g, nut seat 3l, and nut seat 3k links to each other with ball-screw nut 3i; The first servomotor 3d drives ball-screw 3h (band transmission), and axle bed slide plate 3j realizes seesawing of X axle through the guiding of ball-screw 3h transmission, line slideway 3f and slide block 3g, near the extreme position of switch 3w detection limit X axle.
Shown in Fig. 5 a, Fig. 5 c and Fig. 5 d, R axle elevating bracket 3b is installed on the axle bed slide plate 3j, and R axle elevating bracket 3b mainly is made up of interior seat 3m, outer seat 3n and crossbeam 3o; Seat 3m went up in R axle slide block 3p and ball-screw 3q were installed in, R axle line slideway 3r and ball-screw nut 3s be installed on the outer seat 3n; The first servomotor 3t drives ball-screw 3q (band transmission), and outer seat 3n realizes moving up and down of R axle through the guiding of ball-screw 3q transmission, R axle line slideway 3r and slide block 3p, near the extreme position of switch 3w detection limit R axle.Crossbeam 3o is installed on the outer seat 3n, and Z axle line slideway 3u is connected on the crossbeam 3o, and retaining refers to that 3c is installed on the Z axle slide block 3v, and retaining refers to that 3c manually horizontally slips through the guiding of Z axle line slideway 3u and slide block 3v.
Like Fig. 1, Fig. 2 and shown in Figure 6; X axle and R rays close switch 3w signal are transferred to electronic box 7a on floor push 7c, the rear material stopping device; Electronic box 7a is installed on the riser 1d of frame right side; Electronic box 7a transfers signals to digital control system 7 again, and digital control system 7 is installed on the riser 1d of frame right side through arm 7b; Grating chi 7d and grating chi guard shield 7e are installed on C shape plate 1g, and grating chi 7d signal directly is transferred to digital control system 7.
Like Fig. 1, Fig. 2 and shown in Figure 7, Oil pump electrical machinery 8a links to each other with fuel tank 1a through electric-motor pump flange 1l, and hydraulic system 8 is installed in the top of fuel tank 1a, links to each other with topping up flange seat 8c through pipeline with oil cylinder 8b.
Like Fig. 8 is the fundamental diagram of the utility model, and the operator imports the bending workpieces parameter in DNC (being digital control system), and system calculates bending power automatically, X, R axle driver (electrical equipment in the electronic box) location dimension; Driven by servomotor, the position of rotation semiclosed loop feedback rear material stopping device, the rear material stopping device location; Step on floor push, the starting of Y axle driver (electrical equipment in the electronic box) control Oil pump electrical machinery, the position of grating chi closed loop feedback slide plate, the piston rod of oil cylinder stretches out, and down, the worker advances slide plate soon, return after bending is accomplished.
Like following table 1 is the basic parameter of the utility model bender machine:
Table 1
The electrichydraulic control process of the utility model bender is: when the operator imported some basic parameters of bending workpieces in DNC after, DNC went out the bending power of this workpiece of bending, the location dimension of X, R axle, the distance of slide plate rapid movement according to the calculation of parameter of input.The position of rate conversion point, the position of bottom dead centre, upper dead center position or the like, and difference control ratio overflow valve, X, R axle driver, proportional reversing valve etc., the action of control entire machine.
Be illustrated in figure 9 as the hydraulic schematic diagram of the utility model, and with reference to like the sequence of movement table of following table 2:
Table 2
Machine is in when starting or stoping state, and all valves all are in the normal state, and pressure oil passing ratio reversal valve meta and two logical inserted valves 3. flow back to fuel tank; Machine is quick when descending; Electromagnet YV1, YV2, YV4 all switch on, and pressure oil passing ratio reversal valve right position 3. gets into the oil cylinder epicoele, and 9. the fluid of oil cylinder cavity of resorption flow back in the fuel tank through the quick electromagnetic valve; The slide plate of machine is descended because of conducting oneself with dignity fast, and the hydraulic control one-way valve that is opened carries out topping up to the oil cylinder epicoele;
When machine low speed worker advances, YV1, YV2 energising, all the other electromagnet outages, hydraulic control one-way valve is in closed condition, and pressure oil passing ratio reversal valve right bit stream is 3. gone into the oil cylinder epicoele and is promoted slide block decline, and 8. the fluid of oil cylinder cavity of resorption flow back to fuel tank through counterbalance valve; For alleviating reversing impact, need to carry out to carry out pressure release behind the compacting finished piece(s) and carry out return again the oil cylinder upper cavity pressure through a little time;
When oil cylinder returns soon; Electromagnet YV1, YV3 all switch on; 5. pressure oil get into the oil cylinder cavity of resorption through proportional reversing valve position, a left side and check valve 3.; Oil cylinder piston bar pulling slide plate rises, and 3. oil cylinder epicoele fluid flow back to fuel tank fast through hydraulic control one-way valve and the proportional reversing valve of being opened by control oil, accomplishes the one action circulation to this.
Wherein 7. valve is the safety valve of system's oil cylinder cavity of resorption.
The utility model carries out the straight-line bending of various angles with the simplest universal mold to small-sized thin plate, and simple to operate, versatility is good, and die cost is low, and it is convenient to change, and machine itself has only a basic exercise---rectilinear motion up and down reciprocatingly.
To the how curved workpiece of a small-sized thin plate, according to the program of setting, ram travel adjusted automatically by bender and the backstop material level is put, and setting-up time, and whole bending operations of a part are carried out automatically continuously.And numerical control bender all has the direct programing function of angle, as long as the several data of input through once examination folding and correction, can be accomplished adjustment work, and the workman that need not be skilled in technique, and Oil pump electrical machinery only starts energy-conserving and environment-protective in bending and backhaul process.
Because of what be directed against is small-sized thin plate, before the bending workman only needs a people to be sitting in SP-30/1020, and operation simply easily.Use the processing cost of this bender, comparable common bender practices thrift 20%～70%, and economic effect very significantly.
The fit method of the utility model is following:
(1) should assemble by the assembly technology rules, zero, the parts that are assembled on the single cylinder bender all should conform to quality requirements parts such as unspecified pad, cover on the pattern that do not allow to pack into;
(2) important fixed combinating surfaces such as frame, guide rail, workbench should fit tightly; After fastening, test, only permitted the local insertion of clearance gauge with the 0.05mm clearance gauge; Its insertion depth is not generally answered 20% of greater than width, and the cumulative length of insertable part generally should be above examining 10% of girth;
(3) machinery of single cylinder bender, electric, the hydraulic unit sound when work should be even, and irregular impulsive sound and shriek periodically must not be arranged;
(4) outer surface of single cylinder bender, the unspecified convexity of the pattern that do not have, depression or coarse injustice, the edge that parts combine should be neat, well-balanced;
(5) counter-sunk screw should not given prominence to the part outer surface, and steady pin generally should slightly protrude in the part outer surface, and outstanding value is its chamfering value, and the bolt tail end should protrude in outside the nut, and outstanding value should be greater than 1/5th of its diameter;
(6) install should be neat, attractive in appearance for the pipe of various systems, circuit, not should with other zero, friction or collision take place in parts, the tube bending place should be slick and sly;
(7) main zero, the parts of single cylinder bender expose finished surface do not have collide with, scuffing, corrosion vestige.
The debud mode method of the utility model is following:
(1) debugging of principal pressure: principal pressure is to realize that by the automatic calculating of DNC and by proportional pressure valve control this pressure can detect through following method:
1. connect the principal pressure table
2. DNC is at semi-automatic state
3. work out a program and use 25%, 50%, 75%, 100% of maximum bending power respectively
4. carry out the idle stroke bending
5. observe the force value on the table at slide block bottom dead centre place, its door must be listed identical with following table 3
Table 3
| Maximum bending power percentage | 25％ | 50％ | 75％ | 100％ |
| Unit | bar | bar | bar | bar |
| 300KN | 65 | 130 | 195 | 260 |
(2) debugging of numerical control axle:
The Y axle
1. under the slide block of oil cylinder position, respectively place an isometry block
2. slide block is dropped on the isometry block at a slow speed
3. shutdown, start again after 10 seconds
4. Y=patrix+counterdie+isometry block height
5. the value of Y is imported the DNC system
6. do the initialization return reference point
The X axle
1. the back backgauge is moved to the 100mm place
2. measure the distance between back backgauge finger and mold center
3. this numerical value is imported the DNC system,
4. return reference point (like needs)
The R axle
1. the R axle is moved to the workbench top
2. surveying work platform and backgauge are pointed the distance between the lower plane
3. should be worth input DNC system
4. return reference point (like needs)
Being merely the utility model preferred embodiment in sum, is not the practical range that is used for limiting the utility model.Be that all equivalences of doing according to the content of the utility model claim change and modification, all should belong to the technological category of the utility model.
Claims (3)
1. electro-hydraulic servo single cylinder bender comprises frame, slide plate, rear material stopping device, mould, left and right sides protective door, back protective door, digital control system, electronic box, arm, floor push, grating chi, hydraulic system, Oil pump electrical machinery, oil cylinder; Said frame adopts the steel plate structure that is welded as a whole; Fuel tank, oil cylinder installing plate and channel-section steel are welded between the left and right sides riser; Above the left and right sides riser, be welded with hanger, the under-chassis plate is welded on left and right sides riser below, on the riser of right side, is connected with C shape plate; The workbench riser is through being connected on the frame behind the skewback adjustment height up and down, and workbench and preceding material supporting rack are connected on the workbench riser; Oil cylinder is installed on the oil cylinder installing plate, and the oil cylinder piston bar links to each other with slide plate, and slide block is connected on the oil cylinder installing plate; Line slideway is connected on the slide plate, and the oil cylinder cover is connected on the slide plate, and slide plate moves up and down through flexible, the line slideway and the slider guide of oil cylinder piston bar; Mould comprises upper die and lower die, and patrix joins with slide plate through the fast folder of rotary spanner, and counterdie and die holder, die-cushion aggregate erection are on worktable panel; It is characterized in that; Said rear material stopping device is installed in the frame, and rear material stopping device comprises that retaining refers to, R axle elevating bracket and X axle bed, keeps off referring to be installed on the Z axle slide block; Said R axle elevating bracket is installed on the axle bed slide plate, and said X axle bed is installed on the channel-section steel of frame.
2. electro-hydraulic servo single cylinder bender according to claim 1 is characterized in that: said R axle elevating bracket comprises interior seat, outer seat, crossbeam, first servomotor, be connected Z axle line slideway on the crossbeam, be installed on the seat R axle slide block and ball-screw and be installed in R axle line slideway and the ball-screw nut on outer; Said crossbeam is installed on the outer seat.
3. electro-hydraulic servo single cylinder bender according to claim 1 and 2 is characterized in that: said X axle bed comprises axle bed, second servomotor, line slideway and slide block, ball-screw and nut, axle bed slide plate; Said line slideway is connected on the axle bed, and ball-screw is installed on the axle bed and with said servomotor through bearing block and bearing and joins, and the axle bed slide plate of axle bed is connected with slide block, nut seat, and nut seat links to each other with ball-screw nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200567564U CN202461218U (en) | 2012-02-21 | 2012-02-21 | Electro-hydraulic servo single cylinder bending machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200567564U CN202461218U (en) | 2012-02-21 | 2012-02-21 | Electro-hydraulic servo single cylinder bending machine |
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| CN202461218U true CN202461218U (en) | 2012-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200567564U Expired - Fee Related CN202461218U (en) | 2012-02-21 | 2012-02-21 | Electro-hydraulic servo single cylinder bending machine |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103111500A (en) * | 2013-02-26 | 2013-05-22 | 昆山市天之衣精工机械设备有限公司 | Electric bending machine |
| CN103302151A (en) * | 2013-05-09 | 2013-09-18 | 诸暨市米蓝机械有限公司 | Improved structure of bending machine |
| CN103691777A (en) * | 2013-12-31 | 2014-04-02 | 安徽中瑞机床制造有限公司 | High-precision hydraulic plate bending machine |
| CN104209379A (en) * | 2014-09-19 | 2014-12-17 | 东莞市泽威五金制品有限公司 | Numerical control full-servo bending machine |
| CN108555162A (en) * | 2018-01-05 | 2018-09-21 | 海宁市豪派新材料科技有限公司 | A kind of Integral ceiling corner profile production equipment |
| CN109570285A (en) * | 2018-12-11 | 2019-04-05 | 拓普森(常州)数控科技有限公司 | A kind of electro-hydraulic numerical control Synchronous Bending machine of double servo-pump controls |
| CN107044466B (en) * | 2016-12-30 | 2019-04-09 | 天水锻压机床(集团)有限公司 | Boom bending machine special efficient energy-saving electric-hydraulic ratio system |
| CN109794527A (en) * | 2019-03-26 | 2019-05-24 | 江苏中威重工机械有限公司 | A kind of efficient bending equipment |
| CN110947858A (en) * | 2019-12-24 | 2020-04-03 | 株洲特装智能装备有限公司 | Electro-hydraulic synchronous numerical control bending machine |
| CN113118251A (en) * | 2021-04-30 | 2021-07-16 | 黄柏然 | Precise numerical control equipment with high safety coefficient for part machining |
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2012
- 2012-02-21 CN CN2012200567564U patent/CN202461218U/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103111500A (en) * | 2013-02-26 | 2013-05-22 | 昆山市天之衣精工机械设备有限公司 | Electric bending machine |
| CN103302151A (en) * | 2013-05-09 | 2013-09-18 | 诸暨市米蓝机械有限公司 | Improved structure of bending machine |
| CN103302151B (en) * | 2013-05-09 | 2015-05-13 | 诸暨市米蓝机械有限公司 | Improved structure of bending machine |
| CN104985030B (en) * | 2013-12-31 | 2017-07-28 | 安徽中瑞机床制造有限公司 | A kind of hydrolic plate bender |
| CN103691777A (en) * | 2013-12-31 | 2014-04-02 | 安徽中瑞机床制造有限公司 | High-precision hydraulic plate bending machine |
| CN104985030A (en) * | 2013-12-31 | 2015-10-21 | 安徽中瑞机床制造有限公司 | Hydraulic plate bending machine |
| CN103691777B (en) * | 2013-12-31 | 2015-11-04 | 安徽中瑞机床制造有限公司 | A kind of high-precision hydrolic plate bender |
| CN104209379A (en) * | 2014-09-19 | 2014-12-17 | 东莞市泽威五金制品有限公司 | Numerical control full-servo bending machine |
| CN104209379B (en) * | 2014-09-19 | 2016-04-20 | 东莞市泽威五金制品有限公司 | The full servo bender of numerical control |
| CN107044466B (en) * | 2016-12-30 | 2019-04-09 | 天水锻压机床(集团)有限公司 | Boom bending machine special efficient energy-saving electric-hydraulic ratio system |
| CN108555162A (en) * | 2018-01-05 | 2018-09-21 | 海宁市豪派新材料科技有限公司 | A kind of Integral ceiling corner profile production equipment |
| CN109570285A (en) * | 2018-12-11 | 2019-04-05 | 拓普森(常州)数控科技有限公司 | A kind of electro-hydraulic numerical control Synchronous Bending machine of double servo-pump controls |
| CN109794527A (en) * | 2019-03-26 | 2019-05-24 | 江苏中威重工机械有限公司 | A kind of efficient bending equipment |
| CN110947858A (en) * | 2019-12-24 | 2020-04-03 | 株洲特装智能装备有限公司 | Electro-hydraulic synchronous numerical control bending machine |
| CN113118251A (en) * | 2021-04-30 | 2021-07-16 | 黄柏然 | Precise numerical control equipment with high safety coefficient for part machining |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
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