CN103567702A - Fast online press-fitting method for flywheel ring gears - Google Patents
Fast online press-fitting method for flywheel ring gears Download PDFInfo
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- CN103567702A CN103567702A CN201210265644.4A CN201210265644A CN103567702A CN 103567702 A CN103567702 A CN 103567702A CN 201210265644 A CN201210265644 A CN 201210265644A CN 103567702 A CN103567702 A CN 103567702A
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- gear ring
- patrix
- flywheel
- ring gear
- heating
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000010438 heat treatment Methods 0.000 claims abstract description 38
- 238000003825 pressing Methods 0.000 claims abstract description 22
- 238000001816 cooling Methods 0.000 claims abstract description 14
- 238000001035 drying Methods 0.000 claims abstract description 3
- 238000005507 spraying Methods 0.000 claims abstract description 3
- 230000007246 mechanism Effects 0.000 claims description 29
- 230000006835 compression Effects 0.000 claims description 15
- 238000007906 compression Methods 0.000 claims description 15
- 230000006698 induction Effects 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000013011 mating Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
- B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits
- B23P11/025—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits by using heat or cold
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/001—Article feeders for assembling machines
- B23P19/002—Article feeders for assembling machines orientating the articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/001—Article feeders for assembling machines
- B23P19/006—Holding or positioning the article in front of the applying tool
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Assembly (AREA)
Abstract
The invention discloses a fast online press-fitting method for flywheel ring gears. The fast online press-fitting method for flywheel ring gears includes a preparing procedure before heating a ring gear, a ring gear heating procedure, a ring gear shrink fitting procedure, a water-spraying cooling and drying procedure and a ring gear pressing procedure. The full-range conveying tasks of workpieces among the procedures can be completed through a continuous conveying belt and continuous conveying roller way; in the ring gear heating procedure, the ring gear is heated through a dry self-cooling power-frequency inducting heater. According to the fast online press-fitting method for flywheel ring gears, the dry self-cooling power-frequency inducting heater is used for heating the ring gear, the rigidity requirements of ring gear press-fitting can be met; furthermore, a press=fitting machine is adopted to perform press fitting on the ring gear, assembling speed is increased, assembling quality is improved, and defects of ring gear tooth chipping and flywheel spigot edge chipping are avoided.
Description
Technical field
The present invention relates to engine art, particularly the online gear ring quick press mounting of a kind of flywheel method.
Background technology
Flywheel is High Rotation Speed part, is a very heavy cast iron disk, and flywheel foreign steamer is pressed with gear ring, gear ring and flywheel interference fit.Gear ring is to mesh with the driven wheel of actuating motor, for piloting engine.As shown in Figure 1, the hardness of gear ring 1 required HRC(56-63 before being pressed into flywheel 2), be pressed into the rear requirement of flywheel 2 and be controlled at HRC(52-63), gear ring 1 is not more than 0.2mm with flywheel 2 mating surface end clearances 11.
Between cars on hand, the method major part of pinion rings is a dead lifts, with well formula resistance furnace heating gear ring, in stove, temperature retention time wants 1-1.5 hour temperature just even, reach the swollen amount of rising of gear ring, operative employee lifts by hand flywheel and removes after exposing mating surface and must overlap one by one while hot upper ring gear, assembling speed does not catch up with the swollen quantity not sufficient that rises of gear ring that the gear ring causing swollen rise quantity not sufficient or heating itself cause, and all can cause gear ring cover not enter flywheel.Gap is not reached to beaing gear ring is pressed onto to position with hammer of 0.2mm.
The shortcoming of existing pinion rings method:
First, gear ring press-fits front employing and heats with shaft furnace, and heating and heat preservation, for up to 120-150min, consumes energy high, and gear ring case hardness declines up to 8HRC, does not reach the hardness requirement that gear ring press-fits, and the fault of the driven gear wear of gear ring is occurred often.
Secondly, the existing flywheel formula of setting up a stall is deposited, and the ground area of standing is large, and workshop is limited; If move a flywheel when pinion rings, just put a gear ring, need operative employee's muscle power to move and at least 4 people cooperation, mobile carrying affects assembling speed, need, to gear ring post bake, cause fruitless labour also to affect assembly quality.
Moreover gear ring can not overlap to put in place and not reach that mating surface gap requires, and needs manually with "painted-face" character in opera or aluminium hammer hammering gear ring, be difficult to reach fit clearance and be less than 0.2mm requirement, and hammering hand-manipulated is just clicked, often can not meet whole circumference and all reach gap requirement, labour intensity is very big.Beat gear ring and easily cause and collapse tooth, discontinuity make flywheel seam cracking, collapse limit, and behaviour's sound is large, does not meet safety and environmental protection requirement.
Summary of the invention
The present invention is in order to overcome defect in above-mentioned prior art, according to the invention provides, a kind ofly can meet the hardness requirement that gear ring press-fits, the online gear ring quick press mounting of the flywheel method that assembling speed is fast, quality is high.
For achieving the above object, according to the invention provides the online gear ring quick press mounting of a kind of flywheel method, comprise: preparatory process, gear ring heating process, gear ring hot jacket operation, cooling operation and the gear ring compression operation of drying up of spraying water before gear ring heating, task is carried in all fronts that each inter process adopts continuous conveyor and conveying raceway to complete workpiece, and gear ring heating process adopts the self cooling line-frequency induction heater heating of dry type gear ring.
In technique scheme, the self cooling line-frequency induction heater of dry type heats two to three gear rings simultaneously.
In technique scheme, gear ring compression operation employing pressing machine completes the online gear ring of flywheel and press-fits, and pressing machine comprises: stepping transfer bar mechanism, center contraposition mechanism and patrix rotary pressing mechanism; Stepping transfer bar mechanism comprises: motor, decelerator, carrier chain and push rod, the V-shaped location of push rod shape, for revising the position of flywheel on conveying raceway.
Technique scheme Zhong， center contraposition mechanism comprises: upper top gas cylinder and the centralized positioning taper pin that is subject to top air cylinder driven.
In technique scheme, patrix rotary pressing mechanism comprises: patrix rotating mechanism and compression patrix, patrix rotating mechanism comprises: motor, decelerator, sprocket shaft group and patrix bearing support, and be welded on the patrix sprocket on patrix bearing support circumscribed circle, motor drives patrix sprocket, patrix bearing support to rotate by decelerator and sprocket shaft group, compresses patrix and is fixed on described patrix bearing support.
Compared with prior art, the present invention has following beneficial effect: the online gear ring quick press mounting of this flywheel method, by adopting the self cooling line-frequency induction heater heating of dry type gear ring, can meet the hardness requirement that gear ring press-fits; Adopt in addition pressing machine to carry out gear ring and press-fit, improved assembling speed and assembly quality, avoided gear ring to collapse the defect that tooth and flywheel seam collapse limit.
Accompanying drawing explanation
Fig. 1 is the assembly structure schematic diagram of gear ring of the present invention and flywheel;
Fig. 2 is the flow chart of the online gear ring quick press mounting of flywheel of the present invention method;
Fig. 3 is the pressing machine structural representation of the online gear ring quick press mounting of flywheel of the present invention method;
Fig. 4 is the main TV structure schematic diagram of compression patrix of the pressing machine of the online gear ring quick press mounting of flywheel of the present invention method;
Fig. 5 is the compression patrix sectional structure schematic diagram of the pressing machine of the online gear ring quick press mounting of flywheel of the present invention method;
Fig. 6 is the compression patrix plan structure schematic diagram of the pressing machine of the online gear ring quick press mounting of flywheel of the present invention method.
The specific embodiment
Below in conjunction with accompanying drawing, a specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention is not subject to the restriction of the specific embodiment.It will be appreciated that, mentioned in following embodiment of the present invention " on ", D score, " left side ", " right side ", " front " and " reverse side " all take the direction shown in each figure as benchmark, these words that are used for limiting direction are only used to be convenient to explanation, do not represent the restriction to the concrete technical scheme of the present invention.
That the online gear ring quick press mounting of flywheel of the present invention method is carried out cleaning → dry up → rinsing → dry up → gear ring heating → gear ring hot jacket of Automobile flywheel and gear ring → spray water on a streamline is cooling → and dry up → compress → operations such as blanking, wherein, the cleaning of flywheel and gear ring, dry up, rinsing, dry up operation again and belong to preparatory process before gear ring heating.Task is carried in all fronts that each inter process adopts continuous conveyor and conveying raceway to complete workpiece, and all fronts remove feeding, discharge and middle heating gear ring is completed by manual operation, and other station all adopts automatic control to complete.
As shown in Figure 2, the gear ring heating process of the online gear ring quick press mounting of this flywheel method adopts the self cooling line-frequency induction heater heating of dry type gear ring, this gear ring Fast Heating method is controlled in 3HRC the decline of gear ring hardness, guaranteed the quality requirement of gear ring hardness, easy and simple to handle, and gear ring temperature is even after heating, energy-saving and cost-reducing.
Use different heating equipment, gear ring firmness change before and after 210 ± 10 ℃ of heating is learnt: shaft furnace heating hardness decline (4-8) HRC, the average super 6HRC that declines, and eddy-current heating hardness declines in 3HRC.
Concrete data are in Table 1
With the self cooling line-frequency induction heater of power 18KW dry type, the different numbers of different gear ring models, once heating are clocked, with high sensitivity point temperature meter, in the contact of gear ring end face point, liquid crystal display temperature rise value, reaches the time of 210 ± 10 ℃ of needs of gear ring heating-up temperature in Table 2.
In addition, the mode of heating of gear ring is preferably heated 2～3 gear rings simultaneously, than single heat time shortening, more than 50%, like this, can produce quickening beat, enhance productivity, and reduce the time that heating gear ring needs, greatly reduce power consumption, cost-saving.
For example: originally used well formula resistance furnace heating electric amount: 75KW heats 188 model gear rings, heats up 1 hour, is incubated 1 hour, 180 of shove charges, single electric weight=75 * (1+1 * 50%)/180=0.625KWh, average single in-furnace time 40 seconds.
And heat 188 model gear rings with inductor heating electric amount: 18KW:
One next intensification is by 38 seconds notes of the upper limit in heating parameters table 2, single electric weight=18 * 38/3600=0.19KWh
Two intensifications are by 55 seconds notes of the heating parameters table upper limit, single electric weight=18 * 55/3600/2=0.14KWh;
Three intensifications are by 58 seconds notes of the heating parameters table upper limit, single electric weight=18 * 58/3600/3=0.097KWh;
Commercial power is by 0.72 yuan/degree, and gear ring of that heating can power cost saving (0.625-0.097) * 0.72=0.38 unit/part;
One day output, by 1500, can be saved 0.38 * 1500=570 unit, and this is obvious economic benefit.
The gear ring of the online gear ring quick press mounting of this flywheel method compresses operation and adopts pressing machine to complete press-fiting of the online gear ring of flywheel.As shown in Figure 3, this pressing machine comprises: stepping transfer bar mechanism, center contraposition mechanism and patrix rotary pressing mechanism.Center contraposition mechanism and patrix rotary pressing mechanism drive by hydraulic pressure unit, the two is arranged on fixedly on four-column hydraulic press as a pressing system, this hydraulic pressure unit is connected with Hydraulic Station, adopt PLC programmable to control, to the good flywheel of contraposition automatically complete compression, pressurize, reset, patrix automatic displacement, compression, pressurize, reset again press-fit overall process.
Wherein, stepping transfer bar mechanism comprises: motor, decelerator, carrier chain and push rod, motor drives push rod to revise the position of flywheel on conveying raceway by decelerator and carrier chain.The V-shaped location of push rod shape, heating gear ring is sleeved on while entering pressing machine on flywheel 2, can be according to flywheel cylindrical (cylindrical contacting with push rod) size, adjust electronic proximity switch position, to revise voluntarily in course of conveying, flywheel 2 is positioned on the center line of conveying raceway, meets the secondary contraposition operation of support platform 3 Shang center contraposition mechanisms.
Center contraposition mechanism is arranged on support platform below 3, and for flywheel 2 is carried out to secondary contraposition, concrete structure comprises: upper top gas cylinder 41 and centralized positioning taper pin 42.Upper top gas cylinder 41 carries out secondary or repeatedly drives centralized positioning taper pin 42 to utilize flywheel centre bore position back and forth to revise flywheel center after workpiece to be installed enters support platform 3, to guarantee that gear ring 1 aligns compression patrix, thereby guarantees to press-fit quality.
Patrix rotary pressing mechanism comprises: patrix rotating mechanism and the compression patrix 6 that is arranged on patrix rotating mechanism bottom.Wherein, patrix rotating mechanism comprises: motor, decelerator, sprocket shaft group 51 and patrix bearing support 52, and be welded on the patrix sprocket 53 on patrix bearing support circumscribed circle.Motor drives patrix sprocket 53, patrix bearing support 52 to be rotated by decelerator and sprocket shaft group 51, and patrix rotating mechanism rotation return amount can be revised (to adjust, compress the rear time to patrix rotation return, meet productive temp).The side of patrix bearing support 52 is also provided with sender bar 54.
As shown in Figures 4 to 6, compress patrix 6 for circular arc (overlooking direction), upper lateral offers 61， bottom, two construction bolt holes, and to be hierarchic structure compress 62.Two cover patrixes are arranged at interval of interior while of patrix bearing support 52, and every cover patrix forms by compressing patrixes 6 for three of certain specification gear ring internal diameter coupling, and three compress patrixes 6 and are distributed on patrix bearing support 52 bottom surfaces, by two bolt-connections to patrix bearing support 52.While press-fiting, compacting machine is transformed into the downward pressure of hold-down cylinder to compress patrix 6, compresses twice six point pressures of 6 pairs of gear rings 1 of patrix, guarantees that gear ring 1 is adhered to the mating surface of flywheel 2, has also avoided gear ring to collapse the defect that tooth and flywheel seam collapse limit simultaneously.
Full-automatic compaction step detailed process: 1. push rod conveying workpieces enters → put in place sender and returns and stop for 0.5 second; On liftout tank top locate → return → liftout tank on top locate → return; Hold-down cylinder press down that pressurize → return, sender, patrix bearing support rotation → hold-down cylinder press down, pressurize → be retracted into original position sender.4. on acceptance line, supplied materials signal enters next operation cycle program automatically, completes an operation cycle in 30 seconds.
The online gear ring quick press mounting of this flywheel method, by adopting the self cooling line-frequency induction heater heating of dry type gear ring, can meet the hardness requirement that gear ring press-fits; Adopt in addition pressing machine to carry out gear ring compression, improved assembling speed and assembly quality, avoided gear ring to collapse the defect that tooth and flywheel seam collapse limit.
Disclosed is above only several specific embodiment of the present invention, and still, the present invention is not limited thereto, and the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (5)
1. the online gear ring quick press mounting of a flywheel method, comprise: preparatory process, gear ring heating process, gear ring hot jacket operation, cooling operation and the gear ring compression operation of drying up of spraying water before gear ring heating, it is characterized in that, task is carried in all fronts that each inter process adopts continuous conveyor and conveying raceway to complete workpiece, and described gear ring heating process adopts the self cooling line-frequency induction heater heating of dry type gear ring.
2. the online gear ring quick press mounting of flywheel according to claim 1 method, is characterized in that: the self cooling line-frequency induction heater of described dry type heats two to three gear rings simultaneously.
3. the online gear ring quick press mounting of flywheel according to claim 1 and 2 method, it is characterized in that: described gear ring compression operation employing pressing machine completes the online gear ring of flywheel and press-fits, and described pressing machine comprises: stepping transfer bar mechanism, center contraposition mechanism and patrix rotary pressing mechanism; Described stepping transfer bar mechanism comprises: motor, decelerator, carrier chain and push rod, the V-shaped location of described push rod shape, for revising the position of flywheel on conveying raceway.
4. the online gear ring quick press mounting of flywheel according to claim 3 method, is characterized in that: described center contraposition mechanism comprises: upper top gas cylinder and be subject to the centralized positioning taper pin of described upper top air cylinder driven.
5. the online gear ring quick press mounting of flywheel according to claim 3 method, it is characterized in that: described patrix rotary pressing mechanism comprises: patrix rotating mechanism and compression patrix, described patrix rotating mechanism comprises: motor, decelerator, sprocket shaft group and patrix bearing support, and be welded on the patrix sprocket on patrix bearing support circumscribed circle, described motor drives described patrix sprocket, patrix bearing support to rotate by decelerator and sprocket shaft group, and described compression patrix is fixed on described patrix bearing support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210265644.4A CN103567702B (en) | 2012-07-30 | 2012-07-30 | Flywheel online gear ring quick press mounting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210265644.4A CN103567702B (en) | 2012-07-30 | 2012-07-30 | Flywheel online gear ring quick press mounting method |
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| Publication Number | Publication Date |
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| CN103567702A true CN103567702A (en) | 2014-02-12 |
| CN103567702B CN103567702B (en) | 2016-01-20 |
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| CN201210265644.4A Active CN103567702B (en) | 2012-07-30 | 2012-07-30 | Flywheel online gear ring quick press mounting method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105351088A (en) * | 2015-11-12 | 2016-02-24 | 广西科技大学鹿山学院 | FSAE racing engine rotor and manufacturing method thereof |
| CN105945512A (en) * | 2016-07-12 | 2016-09-21 | 长沙飞斯特机械制造有限公司 | Flywheel gear ring pressing machine |
| CN106271379A (en) * | 2016-08-26 | 2017-01-04 | 武汉船用机械有限责任公司 | A kind of bearing installation method |
| CN112222759A (en) * | 2020-07-20 | 2021-01-15 | 武汉光谷航天三江激光产业技术研究院有限公司 | Method and device for segmented heating and press fitting before welding |
| CN112935765A (en) * | 2021-01-29 | 2021-06-11 | 重庆新炬鑫机械有限公司 | Flywheel gear ring rapid pressing machine |
| CN114799720A (en) * | 2022-06-28 | 2022-07-29 | 烟台黄金职业学院 | A processingequipment that is used for gold and jade setting to assemble |
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| KR100216822B1 (en) * | 1996-12-31 | 1999-09-01 | 박문규 | Press-fit device of vehicle flywheel and ring gear |
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2012
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| US3775831A (en) * | 1972-07-20 | 1973-12-04 | Park Ohio Industries Inc | Method of producing a ring gear and flywheel assembly |
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Non-Patent Citations (1)
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105351088A (en) * | 2015-11-12 | 2016-02-24 | 广西科技大学鹿山学院 | FSAE racing engine rotor and manufacturing method thereof |
| CN105351088B (en) * | 2015-11-12 | 2017-12-19 | 广西科技大学鹿山学院 | A kind of FSAE racing engines rotor and preparation method thereof |
| CN105945512A (en) * | 2016-07-12 | 2016-09-21 | 长沙飞斯特机械制造有限公司 | Flywheel gear ring pressing machine |
| CN106271379A (en) * | 2016-08-26 | 2017-01-04 | 武汉船用机械有限责任公司 | A kind of bearing installation method |
| CN106271379B (en) * | 2016-08-26 | 2018-10-02 | 武汉船用机械有限责任公司 | A kind of bearing installation method |
| CN112222759A (en) * | 2020-07-20 | 2021-01-15 | 武汉光谷航天三江激光产业技术研究院有限公司 | Method and device for segmented heating and press fitting before welding |
| CN112935765A (en) * | 2021-01-29 | 2021-06-11 | 重庆新炬鑫机械有限公司 | Flywheel gear ring rapid pressing machine |
| CN112935765B (en) * | 2021-01-29 | 2022-09-06 | 重庆新炬鑫机械有限公司 | Flywheel gear ring rapid pressing machine |
| CN114799720A (en) * | 2022-06-28 | 2022-07-29 | 烟台黄金职业学院 | A processingequipment that is used for gold and jade setting to assemble |
| CN114799720B (en) * | 2022-06-28 | 2022-09-09 | 烟台黄金职业学院 | A processing device for shape-setting assembly of gold and jade |
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| CN103567702B (en) | 2016-01-20 |
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