CN105852340B - A kind of noble metal pearl class processing of ornament method - Google Patents

A kind of noble metal pearl class processing of ornament method Download PDF

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Publication number
CN105852340B
CN105852340B CN201610275376.2A CN201610275376A CN105852340B CN 105852340 B CN105852340 B CN 105852340B CN 201610275376 A CN201610275376 A CN 201610275376A CN 105852340 B CN105852340 B CN 105852340B
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pearl
noble metal
metal tube
metal
press
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CN105852340A (en
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徐可
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China University of Geosciences
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China University of Geosciences
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Priority to CN201710951630.0A priority Critical patent/CN107668858A/en
Priority to CN201610275376.2A priority patent/CN105852340B/en
Publication of CN105852340A publication Critical patent/CN105852340A/en
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    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C27/00—Making jewellery or other personal adornments
    • A44C27/001—Materials for manufacturing jewellery
    • A44C27/002—Metallic materials
    • 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
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • C23C14/14—Metallic material, boron or silicon
    • C23C14/16—Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon
    • C23C14/165—Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon by cathodic sputtering
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
    • C23C14/34—Sputtering
    • C23C14/35—Sputtering by application of a magnetic field, e.g. magnetron sputtering

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Adornments (AREA)

Abstract

The invention discloses a kind of noble metal pearl class processing of ornament method, by optimizing rolling mill practice and Sheet Metal Forming Technology, noble metal pearl class jewellery are produced using technology for plating titanium and light decorations process, in the case where ensureing Forming Quality and machining accuracy, improve the wearability and corrosion resistance of noble metal pearl class jewellery, noble metal pearl class jewellery are enable to keep bright metallic luster for a long time, simultaneously, it can also make that the compatibility of obtained noble metal pearl class jewellery and application on human skin is more preferable, and the probability of the phenomena of cutaneous irritation of initiation is lower.

Description

A kind of noble metal pearl class processing of ornament method
Technical field
The invention belongs to noble metal to shape technical field, more particularly to a kind of noble metal pearl class processing of ornament side Method.
Background technology
Noble metal is typically conventional to be had：Au Ag Pt Pd and its alloy, manufacture ornaments and industrial components it is general use with Lower process manufacture：Make by hand, hot investment casting, pressure processing, machining, electroforming, the methods of welding.In noble metal pearl In class ornament, the pearl class and chain class noble metal jewelry of various styles and moulding so that the species of precious metal jewelry is complicated, but Therefore the technological ability and technical merit of manufacturing enterprise are challenged, therefore, noble metal jewelry processing factory is generally provided with stock portion, With realize noble metal ingot is stretched in various plant equipment, punching press, winding, the operation such as shearing, be entering for other departments The processing of one step prepares preliminary blank, therefore, the plant equipment developed in noble metal processing have arm-tie, drawing machine, tablet press machine, Oil pressure die press, eat up part of die press, twisted piece machine etc..
In the existing noble metal pearl class jewellery used, quality, dimensional accuracy and the surface flatness of pearl shape part are all shadows The necessary factor of its price is rung, during people's long periods of wear these pearl shape dress ornaments, pearl shape dress ornaments are often by outside Environment and be corroded and aoxidize, if people are when wearing gold jewelry, gold can absorb the toxin or meeting and skin of application on human skin On sweat interaction and black jaundice, meanwhile, gold can also be reacted with the sulphur in the mercury and air in cosmetics and Black, when gold is with platinum phase mutual friction, can also turn white on the surface of gold because rubbing upper platinum, these can all cause gold Lose metallic luster and influence the decorative value of gold；When people wear silver jewellery, desilver can be outer by external environment condition oxidation, by It is inadequate in silver jewellery surface flatness, it can also accelerate the oxidation of silver surface, and cause silver jewellery to lose metallic luster, and then influence The decorative value of jewellery.Further, since gold and silver that purity is higher, their pliability is higher, and wearability is lower, when When people wear these jewellery, in long-term scratch, gold and silver quality can slowly reduce, and then owner is caused through Ji loss.
The content of the invention
The goal of the invention of the present invention is：For above-mentioned problem, there is provided a kind of noble metal pearl class processing of ornament side Method, by optimizing rolling mill practice and Sheet Metal Forming Technology, noble metal pearl class jewellery are produced using technology for plating titanium and light decorations process, are being protected In the case of demonstrate,proving Forming Quality and machining accuracy, the wearability and corrosion resistance of noble metal pearl class jewellery are improved, makes noble metal pearl Class jewellery can keep bright metallic luster for a long time, simultaneously, moreover it is possible to make the compatible of obtained noble metal pearl class jewellery and application on human skin Property is more preferable, and the probability of the phenomena of cutaneous irritation of initiation is lower.
To reach above-mentioned purpose, the technical solution adopted by the present invention is as follows：A kind of noble metal pearl class processing of ornament method, bag Include following steps：
Step 1: according to the product design figure of the noble metal of required processing, the diel of press is made, so that rear The stamping products for meeting design can be obtained in continuous stamping procedure；
Step 2: the blank of noble metal is pressed into the lath for meeting design requirement by roll squeezer；
Step 3: last layer titanium film is plated by magnetron sputtering method on a surface of noble metal lath；
Step 4: the noble metal lath in step 3 is subjected to recrystallization annealing, to eliminate processing hardening phenomenon, Ran Houyong Coiling machine is curled into pipe fitting, wherein, the one of titanium film is coated with facing in pipe, two sides is then subjected to seamless weldings again, with shape Into circular tube shaped metal tube；
Step 5: metal tube is made annealing treatment, then on strain plate by metal tube drawing step by step from coarse to fine, directly To being drawn into the metal tube that meets design size；
Step 6: the metal tube drawn is put into the diel of press, required outer shape is pressed into, is obtained To the metal tube of pearl shape series winding；
Step 7: being cut to the metal tube of pearl shape series winding, pearl shape part is obtained, titanizing then is carried out to pearl shape part again, Method still uses magnetron sputtering method；
Step 8: obtained pearl shape part is carried out into surface clean, driving flower processing is then entered on the surface of pearl shape part, is obtained The pearl shape part of required surface configuration；
Step 9: obtained pearl shape part is carried out into surface clean, light decorations process, light decorations are then carried out by centrifugal finishing machine After having handled, place into and 1-3h is soaked in absolute ethyl alcohol, finally take out drying, detect and check and accept after drying.
In above-mentioned processing step, increased technology for plating titanium can greatly improve the anti-wear performance of noble metal, and technology for plating titanium is A kind of titanizing/zirconium metallic surface processing method, to improve the wearability of object surface, in the present invention, using Vacuum Magnetic Control sputtering method to carry out coating film treatment to precious metal surface, according to the color and luster color of noble metal lath, selects matched The color of plated film, selectable color have gold, brass, silvery white etc., then last layer titanium film are plated on its surface, due to adopting It is vacuum magnetic-control sputtering method, the thickness of obtained plated film is not over 1 μm, in follow-up drawing and stamping procedure, due to The extensional of metal tube, the titanium film thickness on precious metal surface is further reduced, pass through rough calculation, the weight of plated film Very little very little, can be ignored, the weight very little of the pearl shape ornaments obtained to the later stage, to the dimensional accuracy shadow of pearl shape part Ring very little.On anti-wear performance, titanium film have the characteristics that high rigidity, it is antifriction, do not peel off, be not easy to scratch, under ultraviolet light not It can peel, these performances can make precious metal jewelry not to be worn in scratch friction process, and the weight of noble metal can be protected almost Hold constant weight；In corrosion resistance, titanium film has a height anti-corrosive properties, Surface of Titanium Film either titanium nitride, titanium carbide or titanium carbonitride, All there is very strong chemical stability, not with general acid-base reaction, be not easy to be etched electrochemically, will not be with the chemical industry of mercury etc Element reaction, the surface of precious metal jewelry can be protected, make precious metal surface that the phenomenon turned white will not occur, will not also adhere to Other metal ingredients；In processing characteristics, titanium film has good plasticity, more than 90-degree bent, be not easy to occur fracture, The defects of decortication and galled spots, therefore, the noble metal lath after titanizing, influence smaller in following process on the quality of coating； In durability, the color of the titanium film of formation will not also fade in long-term use, and anti-destructive is stronger, surface easy cleaning, After light is adornd, the coupler surface of titanium film can maintain more than 20 years；When being coated with the noble metal of titanium film and directly being contacted with human body skin, The occurrence probability of allergic phenomena can be reduced, part is also worn the crowd of the noble metal allergy such as yellow gold, silver.
In order to ensure that the machining accuracy of noble metal and surface are moist, using by metal tube drawing step by step from coarse to fine, Until being drawn into the design size met, it so can guarantee that the thickness of pipe of resulting metal tube is uniform, surface is moist, and nothing is split The defects of line, fold, rupture；By carrying out light decorations process to obtained pearl shape part, make the surface of pearl shape part smooth, delay its table Electrochemical corrosion suffered by face, increase the surface quality and aesthetic appearance of pearl shape part.
Uniform in order to preferably obtain thickness, the high noble metal lath of dimensional accuracy, in step 2, pressing process specifically wraps Include：First noble metal blank is made annealing treatment, in order to which packing pressure is processed, breaking down then is carried out to noble metal blank, just After rolling, noble metal blank is made annealing treatment, to eliminate processing hardening phenomenon and residual stress, finish rolling is carried out after annealing.
Further, in step 4, the thickness of general pearl shape part is between 0.5-2mm, therefore seamless welding uses tungsten electrode argon Arc-welding, tungsten electrode a diameter of 0.6-1.0mm, gage of wire 1.6mm, welding current 120-160A, argon flow amount 14-18L/ Min, nozzle bore 8-12mm, wire feed rate 108-117cm/min, to obtain satisfactory weld seam.
Further, in step 5, before drawing is carried out, the drawing mould of a set of required geomery is chosen, then by gold Belong in one end insertion pulling eye of pipe, applying pulling force to metal tube is passed to pulling eye, then makes metal tube again by relatively previously drawing The small pulling eye in hole aperture, to reach progressively deformation, finally give the metal tube for meeting design size.
To ensure metal tube be not in fold in hammer pearl deformation process, rupture the defects of, in step 6, pressed metal Pipe concretely comprises the following steps：
Step 1, the charging aperture feeding by the metal tube drawn from press, the head of metal tube enters in punching press grinding tool The length of less than one pearl section；
Step 2, the parameter request according to deisgn product, it is determined that the diameter of obtained noble metal pearl class, pearl section length, hammer pearl into shape Rotary index when machine hammers pearl into shape is 60 °；
Step 3, start press, press is once hammered diel, metal tube produces to be plastically deformed for the first time；
After the completion of step 4, metal tube are plastically deformed for the first time, 60 ° of rotating metallic pipe, then repeat step 3, until metal Pipe has turned 360 °；
After the completion of step 5, step 4, the press demoulding, the length for one pitch that metal tube is advanced into mould, suppress Machine matched moulds, using the process for stamping of gradually increase amount of plastic deformation, while complete second of necking down and second of first pearl section The first time necking down shaping of individual pearl section, repeat step 3 to step 4, until completing the shaping of whole metal tube, obtain pearl shape series winding Metal tube, in above-mentioned, pitch refers to length of the section of pearl in the materials in the tube shaping the latter pearl section in pipe axial direction.
Further, in step 9, obtained pearl shape part is put into the keg of centrifugal finishing machine, start motor, adjust from The major parameter of heart light polishing machine, the rotating speed for making centrifugal finishing machine are 180-200rad/min.
In summary, by adopting the above-described technical solution, the beneficial effects of the invention are as follows：The noble metal pearl class of the present invention Processing of ornament method, by optimizing rolling mill practice and Sheet Metal Forming Technology, noble metal pearl is produced using technology for plating titanium and light decorations process Class jewellery, in the case where ensureing processing characteristics and machining accuracy, improve the wearability of noble metal pearl class jewellery and anticorrosive Property, noble metal pearl class jewellery is kept bright metallic luster for a long time, simultaneously, moreover it is possible to make obtained noble metal pearl class jewellery with The compatibility of application on human skin is more preferable, and the probability of the phenomena of cutaneous irritation of initiation is lower.
Embodiment
With reference to embodiment, the present invention is described in detail.
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to Limit the present invention.
A kind of noble metal pearl class processing of ornament method, the noble metal include gold and silver, and processing method includes following step Suddenly：
Step 1: according to the product design figure of the noble metal of required processing, the diel of press is made；
Step 2: first being made annealing treatment to noble metal blank, then noble metal blank is delivered into progress breaking down at roll squeezer, After breaking down, noble metal blank is made annealing treatment, finish rolling is carried out after annealing, to obtain the lath for meeting design requirement；
Step 3: last layer titanium film is plated by magnetron sputtering method on a surface of noble metal lath；
Step 4: the noble metal lath in step 3 is subjected to recrystallization annealing, to eliminate processing hardening phenomenon, Ran Houyong Coiling machine is curled into pipe fitting, wherein, the one of titanium film is coated with facing in pipe, and two sides are then subjected to seamless weldings again, it is seamless Welding uses argon tungsten-arc welding, tungsten electrode a diameter of 0.6-1.0mm, gage of wire 1.6mm, welding current 120-160A, argon Throughput is 14-18L/min, nozzle bore 8-12mm, wire feed rate 108-117cm/min, obtains having qualified weld seam Circular tube shaped metal tube；
Step 5: metal tube is made annealing treatment, then on strain plate by metal tube drawing step by step from coarse to fine, Before carrying out drawing, the drawing mould of a set of required geomery is chosen, is then inserted one end of metal tube in pulling eye, to metal Pipe applies pulling force and is passed to pulling eye, then makes metal tube again by the small pulling eye in more previous pulling eye aperture, to reach progressively shape Become, until being drawn into the metal tube for meeting design size；
Step 6: the metal tube drawn is put into the diel of press, required outer shape is pressed into, is obtained To the metal tube of pearl shape series winding；
Step 7: being cut to the metal tube of pearl shape series winding, pearl shape part is obtained；
Step 8: obtained pearl shape part is carried out into surface clean, driving flower processing is then entered on the surface of pearl shape part, is obtained The pearl shape part of required surface configuration, then carries out titanizing to pearl shape part again, and method still uses magnetron sputtering method；
Step 9: obtained pearl shape part is carried out into surface clean, light decorations process is then carried out by centrifugal finishing machine, specifically The light decorations process time determines according to the species, the size of obtained pearl shape part and the size of the disposable treating capacity of light polishing machine of noble metal It is fixed, after light decorations process is complete, obtained pearl shape part is put into the keg of centrifugal finishing machine, starts motor, adjusts centrifugal finishing machine Major parameter, the rotating speed for making centrifugal finishing machine is 180-200rad/min, places into and 1-3h is soaked in absolute ethyl alcohol, finally take Go out drying, detect and check and accept after drying.
In above-mentioned procedure of processing, the step 6 concretely comprises the following steps：
Step 1, the charging aperture feeding by the metal tube drawn from press, the head of metal tube enters in punching press grinding tool The length of less than one pearl section；
Step 2, the parameter request according to deisgn product, it is determined that the diameter of obtained noble metal pearl class, pearl section length, hammer pearl into shape Rotary index when machine hammers pearl into shape is 60 °；
Step 3, start press, press is once hammered diel, metal tube produces to be plastically deformed for the first time；
After the completion of step 4, metal tube are plastically deformed for the first time, 60 ° of rotating metallic pipe, then repeat step 3, until metal Pipe has turned 360 °；
After the completion of step 5, step 4, the press demoulding, the length for one pitch that metal tube is advanced into mould, suppress Machine matched moulds, using the process for stamping of gradually increase amount of plastic deformation, while complete second of necking down and second of first pearl section The first time necking down shaping of individual pearl section, repeat step 3 to step 4, until completing the shaping of whole metal tube, obtain pearl shape series winding Metal tube, metal tube segments moulding process complete.
The processing method improves the wear-resisting of noble metal pearl class jewellery in the case where ensureing processing characteristics and machining accuracy Property and corrosion resistance, noble metal pearl class jewellery is kept bright metallic luster for a long time, simultaneously, moreover it is possible to make obtained noble metal The compatibility of pearl class jewellery and application on human skin is more preferable, and the probability of the phenomena of cutaneous irritation of initiation is lower.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.

Claims (6)

  1. A kind of 1. noble metal pearl class processing of ornament method, it is characterised in that comprise the following steps：
    Step 1: according to the product design figure of the noble metal of required processing, the diel of press is made；
    Step 2: the blank of noble metal is pressed into the lath for meeting design requirement by roll squeezer；
    Step 3: last layer titanium film is plated by magnetron sputtering method on a surface of noble metal lath；
    Step 4: the noble metal lath in step 3 is subjected to recrystallization annealing, to eliminate processing hardening phenomenon, then with batching Machine is curled into pipe fitting, wherein, the one of titanium film is coated with facing in pipe, two sides is then subjected to seamless weldings again, to form circle Tubular metal pipe；
    Step 5: metal tube is made annealing treatment, then by metal tube drawing step by step from coarse to fine on strain plate, until drawing The metal tube for meeting design size is made；
    Step 6: the metal tube drawn is put into the diel of press, required outer shape is pressed into, obtains pearl The metal tube of shape series winding；
    Step 7: being cut to the metal tube of pearl shape series winding, pearl shape part is obtained；
    Step 8: obtained pearl shape part is carried out into surface clean, driving flower processing is then entered on the surface of pearl shape part, is obtained required The pearl shape part of surface configuration, then carries out titanizing to pearl shape part again, and method still uses magnetron sputtering method；
    Step 9: obtained pearl shape part is carried out into surface clean, light decorations process, light decorations process are then carried out by centrifugal finishing machine After complete, place into and 1-3h is soaked in absolute ethyl alcohol, finally take out drying, detect and check and accept after drying.
  2. 2. noble metal pearl class processing of ornament method as claimed in claim 1, it is characterised in that in step 2, pressing process tool Body includes：First noble metal blank is made annealing treatment, breaking down then is carried out to noble metal blank, after breaking down, to noble metal base Material is made annealing treatment, and finish rolling is carried out after annealing.
  3. 3. noble metal pearl class processing of ornament method as claimed in claim 1, it is characterised in that in step 4, seamless welding is adopted With argon tungsten-arc welding, tungsten electrode a diameter of 0.6-1.0mm, gage of wire 1.6mm, welding current 120-160A, argon flow amount For 14-18L/min, nozzle bore 8-12mm, wire feed rate 108-117cm/min, to obtain satisfactory weld seam.
  4. 4. noble metal pearl class processing of ornament method as claimed in claim 1, it is characterised in that in step 5, carrying out drawing Before, the drawing mould of a set of required geomery is chosen, then by one end insertion pulling eye of metal tube, metal tube is applied and drawn Power is passed to pulling eye, then makes metal tube again by the small pulling eye in more previous pulling eye aperture, final to obtain to reach progressively deformation To the metal tube for meeting design size.
  5. 5. noble metal pearl class processing of ornament method as claimed in claim 1, it is characterised in that in step 6, pressed metal pipe Concretely comprise the following steps：
    Step 1, the charging aperture feeding by the metal tube drawn from press, the head of metal tube, which enters in punching press grinding tool, to be less than The length of one pearl section；
    Step 2, the parameter request according to deisgn product, it is determined that the diameter of obtained noble metal pearl class, pearl section length, hammer pearl machine hammer Rotary index during pearl is 60 °；
    Step 3, start press, press is once hammered diel, metal tube produces to be plastically deformed for the first time；
    After the completion of step 4, metal tube are plastically deformed for the first time, 60 ° of rotating metallic pipe, then repeat step 3, until metal tube turns Complete 360 °；
    After the completion of step 5, step 4, the press demoulding, the length for one pitch that metal tube is advanced into mould, press conjunction Mould, using the process for stamping of gradually increase amount of plastic deformation, while complete second of necking down and second pearl that first pearl is saved The first time necking down shaping of section, repeat step 3 to step 4, until completing the shaping of whole metal tube, obtains the gold of pearl shape series winding Category pipe.
  6. 6. noble metal pearl class processing of ornament method as claimed in claim 1, it is characterised in that in step 9, the pearl that will obtain Shape part is put into the keg of centrifugal finishing machine, starts motor, adjusts the major parameter of centrifugal finishing machine, makes turning for centrifugal finishing machine Speed is 180-200rad/min.
CN201610275376.2A 2016-04-29 2016-04-29 A kind of noble metal pearl class processing of ornament method Expired - Fee Related CN105852340B (en)

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CN106862870A (en) * 2017-02-17 2017-06-20 深圳粤通国际珠宝股份有限公司 A kind of method for processing noble metal
CN108618288A (en) * 2018-05-21 2018-10-09 深圳市萃华珠宝首饰有限公司 A kind of bullion processing method
CN109263385A (en) * 2018-09-20 2019-01-25 广州市飞时达钟表有限公司 A kind of preparation method of embossment wrist-watch gold dial plate
CN109590687A (en) * 2018-12-11 2019-04-09 山东梦金园珠宝首饰有限公司 A kind of ball processing method
CN109590688B (en) * 2018-12-11 2022-02-22 山东梦金园珠宝首饰有限公司 Processing method of round beads

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CN102517546B (en) * 2011-12-30 2013-11-13 山推工程机械股份有限公司 Machining method of wear-resistant cutters
CN102758176A (en) * 2012-07-31 2012-10-31 宁波威霖住宅设施有限公司 Method for carrying out full dry method composite film plating on metal surface
CN105105434B (en) * 2015-09-08 2016-10-05 佛山市顺德区汇伦生产力促进服务中心有限公司 Hollow bead automatic moulding machine

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