WO2016154774A1 - 金属管镶套层叠拼嵌金属棒的币章坯材及制备方法 - Google Patents

金属管镶套层叠拼嵌金属棒的币章坯材及制备方法 Download PDF

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WO2016154774A1
WO2016154774A1 PCT/CN2015/000350 CN2015000350W WO2016154774A1 WO 2016154774 A1 WO2016154774 A1 WO 2016154774A1 CN 2015000350 W CN2015000350 W CN 2015000350W WO 2016154774 A1 WO2016154774 A1 WO 2016154774A1
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metal
laminated
coin
pipe
tube
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PCT/CN2015/000350
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English (en)
French (fr)
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张跃群
赵多平
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张跃群
赵多平
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Publication of WO2016154774A1 publication Critical patent/WO2016154774A1/zh

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    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C3/00—Medals; Badges
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C21/00—Coins; Emergency money; Beer or gambling coins or tokens, or the like

Definitions

  • the invention relates to the field of manufacture of coins, currency, commemorative coins (chapter) badges and chips (game coins), and more particularly to a coin-shaped blank material with excellent pattern, recognition performance and anti-counterfeiting performance and preparation thereof method.
  • Chips game currency
  • anti-counterfeiting features are more demanding. Because it is not subject to the control of national financial institutions, the design space and materials are widely used, and the application of anti-counterfeiting technology is also diverse.
  • high-end products are generally made of plastic, ceramic or organic composite materials embedded in chips, but they have defects such as high cost, poor hand feeling and short service life.
  • the method of making double (multiple) color coins is combined by stamping, which is limited to simple symmetrical graphics, and the color is single, and the material utilization rate of the blank stamping process is low.
  • the object of the present invention is to overcome the deficiencies of the prior art, and to provide a metal pipe inlaid laminated metal rod of a metal rod and a preparation method thereof for improving and improving the current manufacturing and anti-counterfeiting level of the coinage industry.
  • a metal tube inlay is stacked with a coin-shaped blank material embedded in a metal rod.
  • the coin billet material is made of one or more metal tubes
  • the laminated metal rod is formed by radially laminating two or more layers of metal rods.
  • the cross section of the material is a variety of geometric patterns and shaped patterns.
  • the laminated metal rods include tubes, rods and profiles.
  • the layered composite metal rods are non-ferrous metals and alloys thereof, ferrous metals and alloys thereof, and noble metals and alloys thereof.
  • the laminated metal rod composite nickel-iron alloy is laminated.
  • a metal tube inlay layered with a metal rod of a coin-shaped blank material relates to a preparation method:
  • the outer metal tube and the inner layer laminated metal rod are obtained by extrusion, rolling, drawing, forging and powder metallurgy process technology alone or in combination to form a billet blank with different cross-sections, and after vacuum heat treatment And then through the cutting process to obtain the coins of the blank, the specific steps are as follows:
  • the blank tube is inspected and placed in a drawing machine for sizing and drawing, and the metal tube of the designed size and shape is obtained by drawing technology, and the wall thickness tolerance of the metal tube is controlled to be ⁇ 0.1 mm;
  • the pipe after drawing is degreased, degreased and heat treated, and the hardness of the pipe is controlled to be below 150HV 1 ;
  • the inner wall of the pipe is cleaned by a rotating wire brush, and the particles of metal scraps on the inner wall of the pipe are purged with compressed N 2 gas, and then the inside of the pipe is filled with N 2 gas and sealed for use;
  • the laminated metal rod is made of two or more metal materials of different or the same metal, different or the same size, different or the same shape, which are coated, nested and laminated;
  • the individual materials constituting the laminated metal rods can be obtained by extrusion, rolling, forging, drawing, powder metallurgy processes alone or in combination, and the material dimensional tolerance is controlled to ⁇ 0.05 mm;
  • the material hardness is controlled below 150HV 1 ;
  • the fabricated laminated metal rod is sent into the metal tube through the mechanical device, and the end is rolled and positioned by the shrinking mechanism to avoid the misalignment of the inner layers of the metal, and the end which is crushed by the shrinking head according to the requirements of the composite process Putting in the rolling, drawing and forging of the inlet of any one of the equipment, the corresponding processing is carried out, so that the metal tube and the laminated metal rod are tightly combined;
  • a metal tube which has been laminated and embedded with a metal rod is inserted into a metal tube having a larger diameter, and is rolled, drawn and forged by a crimped end.
  • the corresponding process is processed, so that the outer ring metal pipe is tightly sheathed with the inner ring metal pipe, and so on, until the plurality of metal pipe inserts are stacked and the metal bar of the metal bar is laminated;
  • the present invention has the following beneficial effects:
  • the special identification materials can be laminated together by layered metal composite technology to achieve the purpose of machine-readable anti-counterfeiting;
  • the inlaying process adopts rolling and forging technology.
  • the bonding strength between the layers of metal is larger than that of the drawing process, and there is no defect of looseness between layers.
  • the coin material of the present invention is closely combined by the outer metal pipe 1 and the inner layer laminated metal bar 2 by extrusion, hole rolling, drawing and forging processes. Together, the coins of different shapes are formed, and after vacuum heat treatment, the blanks of the coins are obtained through the cutting process, that is, the coins, the blanks and the blanks.
  • the metal blank tube is obtained by metal extrusion or casting process, and the blank tube is inspected and surface treated and sent to a pilger cold rolling tube machine for pore rolling, and the rolled tube is inspected and placed.
  • the drawing machine is used for sizing and drawing, and the metal pipe of the designed size and shape is obtained by drawing technology, and the wall thickness tolerance of the pipe is controlled to ⁇ 0.1 mm.
  • the drawn pipe is degreased, degreased and heat treated to control the hardness of the pipe below 150 HV 1 .
  • the inner wall of the tube is cleaned by a rotating wire brush, and the particles such as metal debris on the inner wall of the tube are purged with compressed N 2 gas, and then the inside of the tube is filled with N 2 gas sealing treatment and then used.
  • inner layer laminated metal rod 2 Preparation of inner layer laminated metal rod 2: inner layer laminated metal rod 2, generally composed of two or more different or the same metal materials, metal bars of different or the same size, different or the same shape , piled up or set.
  • the shape and size of each metal rod can be obtained by extrusion, rolling, forging, drawing, powder metallurgy alone or in combination, and the material dimensional tolerance is controlled at ⁇ 0.05mm.
  • heat is selected at a suitable temperature to control the hardness of the material below 150 HV 1 , and the heat-treated material is designed according to the pattern.
  • Stacking, stacking or kits are required to form a strip for use.
  • the composite of the outer metal tube 1 and the inner layer of the laminated metal rod 2 the previously prepared laminated metal rod is sent into the outer metal tube 1 through a mechanical device, and the end is rolled and positioned by the shrinking mechanism to avoid The metals in the inner layer are misaligned with each other. According to the requirements of the composite process, the end of the shrink-rolling is placed in the inlet of any of the previously selected rolling, drawing or forging equipment, and the corresponding process is processed to make the outer metal pipe 1 tightly nested inside.
  • the metal bars 2 are laminated and laminated.
  • a plurality of metal pipe 1 inlaid laminated metal bars 2 are inserted into a metal pipe having a diameter larger than a diameter of a metal pipe 1 which has been laminated and embedded in a metal bar 2, and rolled into a rolling end by a crimped end. Pulling and forging the inlet of any one of the equipment, processing the corresponding process, so that the outer ring metal pipe is tightly sheathed with the inner ring metal pipe, and so on, until the metal pipe 1 is embedded and the metal bar 2 is stacked. Chapter blank bar (see Figure 3 to Figure 5).
  • Heat treatment of the billet bar The head of the coin billet is cut to length and then sent to a vacuum heat treatment furnace for brazing or diffusion annealing. According to the nature of the metal, select the appropriate temperature and keep it for 2 ⁇ 5h. According to the requirements of the brazing or diffusion annealing process of the composite material, H 2 , N 2 , and Ar gases may be added during the vacuum heat treatment.
  • Slicing of the billet bar The coagulation of the billet bar after heat treatment is straightened, and the bending degree is controlled to be 1/1000 mm or less.
  • the straightened coin billet is placed in a metal slicer and cut according to the thickness requirements of coins, chapters and emblems.
  • the metal blank obtained after cutting has a thickness tolerance of ⁇ 0.06 mm or less.
  • the coin billet is composed of a metal tube 1 inlaid with a laminated metal rod 2.
  • the metal pipe 1 is made of a copper-nickel alloy tube having a grade of C70600 (ASTM) and a specification of ⁇ 35 ⁇ 4.5 mm and a length of 6000 mm.
  • the copper-nickel alloy pipe is obtained by extrusion ⁇ hole rolling ⁇ drawing ⁇ straightening ⁇ cutting sawing ⁇ heat treatment process.
  • ⁇ 35 ⁇ 4.5mm copper-nickel alloy tube outer diameter tolerance is ⁇ 0.15mm
  • wall thickness tolerance is ⁇ 0.03mm
  • bending degree is controlled below 3/1000mm
  • heat treatment hardness is controlled below 150HV 1 .
  • the pipe was inspected without surface defects such as peeling, cracks, and inclusions.
  • the laminated metal rod 2 is composed of two metal rods having a "D" shape in section and a rectangular metal rod having a drum shape in section.
  • the selected metal grade is C68700 (ASTM), and the metal rod with a cross section of "D" shape, a size of 21.2 ⁇ 8 mm, and a length of 6500 mm.
  • the cross section is a rectangular metal bar with a metal bar of C11000 (ASTM), a size of 22 x 6 mm and a length of 6500 mm.
  • the above metal rod is obtained by continuous extrusion ⁇ drawing ⁇ straightening ⁇ cutting sawing ⁇ heat treatment process. Shape and size tolerance of ⁇ 0.03mm, controlled bending of the 2 / 1000mm or less, heat treatment hardness control 150HV 1 or less.
  • the metal bars were inspected without surface defects such as peeling, cracks, and inclusions.
  • the inner wall of the prepared ⁇ 35 ⁇ 4.5mm copper-nickel alloy tube is cleaned with a rotating wire brush and then purged with N 2 gas to ensure that there is no oil, dust, etc., and it is sealed and used after being filled with nitrogen.
  • the surface of the metal rod with the cross section "D" shape and the rectangular drum type is sandblasted with 80 mesh iron sand, and fine pits appear on the surface.
  • the cleaned "D" shape and the drum-shaped rectangular metal rod are stacked in a design pattern, and one end is fixed by electric welding, the welding length is controlled within 100 mm, and the other end is free.
  • the welded metal rod is welded to the copper-nickel alloy metal tube prepared by the mechanical clamping device, and one end of the metal tube and the metal rod having the welded end are compacted by a metal shrinking machine.
  • the compression length is controlled within 150mm.
  • the compacted end is placed in the loading port of the LD30 multi-row rolling mill, the rolling specification is ⁇ 30mm, the feeding feed is adjusted to 10-20mm, the rolling speed is 80 times/min, then the rolling is started, and the billet is rolled. It is a coin-shaped billet with an outer diameter of ⁇ 30mm.
  • the rolled and finished metal coins of the outer diameter of ⁇ 30 mm were cut off by 200 mm each, and the composite effect was examined from the cut surface.
  • the surface of the billet bar is degreased, sent to a vacuum heat treatment furnace, filled with H 2 gas, vacuum brazed, and the temperature is controlled at 800 ° C for 2 hours.
  • the hardness of the coin billet after vacuum brazing is ⁇ 150HV 1 .
  • the annealed coin billet is straightened by a roll straightener, and the degree of curvature is controlled to be 1/1000 mm or less.
  • the straightened coin billet is placed in a metal slicer for radial cutting to obtain the bill member blank shown in FIG.
  • the billet can be used as a billet for anti-counterfeiting functions such as coinage, stamp making, emblem and chip (game currency).
  • the metal pipe 1 is formed of two kinds of laminated metal rods 2 of the same size and symmetrical shape to form a coin-shaped blank material having a section of "taiji diagram".
  • the metal pipe 1 is made of a copper-nickel alloy tube having a size of C71500 (ASTM) and a specification of ⁇ 35 ⁇ 5 mm and a length of 5000 mm.
  • the copper-nickel alloy pipe is obtained by extrusion ⁇ hole rolling ⁇ drawing ⁇ straightening ⁇ cutting sawing ⁇ heat treatment process.
  • the "Taichi diagram" metal rod 2 is composed of two kinds of metal rods 2 of metal grades C11000 (ASTM) and C26000 (ASTM), and the combined specifications are one metal rod having an outer diameter of mm20 mm and a length of 6000 mm.
  • the metal rod 2 is obtained by continuous extrusion ⁇ drawing ⁇ straightening ⁇ fixed length sawing ⁇ heat treatment process.
  • the metal rod 2 is inspected for surface defects such as peeling, cracking, and inclusions on the inner and outer surfaces.
  • the inner wall of the prepared ⁇ 35 ⁇ 5mm metal pipe 2 is cleaned with a rotating wire brush and then purged with N 2 gas to ensure that there is no oil, dust, etc., and it is filled with N 2 gas seal and used.
  • the surface of the metal rod 2 is sandblasted with 80 mesh iron sand. It is better to have fine pits on the surface. The sandblasting process is carried out before compounding and used as soon as possible to avoid secondary oxidation.
  • the two metal rods 2 after sandblasting are assembled together, one end is fixed by electric welding, and then mechanically passed through a 35 ⁇ 5 mm metal tube 1, and one end of the metal tube 1 and the metal rod 2 having one end welded by electric welding are passed through a metal shrinkage.
  • the head machine is compacted and the compression length is controlled within 150mm.
  • the compacted one of the assembled metal pipe 1 was fed into the ⁇ 40 rotary forging (radial forging) machine inlet, the forging die specification was ⁇ 30 mm, the forging frequency was 1200 times/min, and the feed speed was 10 mm/s.
  • the metal tube 1 and the laminated metal rod 2 are tightly combined to form a new coin billet, the billet bar is ⁇ 30mm, and the outer circle tolerance is ⁇ 0.03mm.
  • the forged and finished metal coin caps with a diameter of ⁇ 30 mm were cut off by 200 mm each, and the composite effect was examined from the cut surface. Then, the surface of the billet bar is degreased, sent to a vacuum heat treatment furnace, filled with H 2 gas, subjected to diffusion annealing treatment, and the temperature is controlled at 800 ° C for 2 hours.
  • the hardness of the coin billet after diffusion annealing is ⁇ 150HV 1 .
  • the annealed coin billet is straightened by a roll straightener, and the degree of curvature is controlled to be 1/1000 mm or less.
  • the straightened coin billet is placed in a metal slicer for radial cutting to obtain the bill member blank of the structure of Fig. 2.
  • the coin billet can be used as a billet for anti-counterfeiting functions such as coinage, stamp making, emblem and chip (game currency).

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Abstract

一种金属管镶套层叠拼嵌金属棒的币章坯材及制备方法，币章坯材由一根或一根以上金属管（1）镶套层叠拼嵌金属棒（2）后经径向切割构成，层叠拼嵌金属棒（2）由两种或两种以上的金属棒径向包覆、叠压复合而成，币章坯材的截面为多种图案及异形图案。币章坯材制备方法是由外层金属管（1）和内层层叠拼嵌金属棒（2）通过挤压、轧制、拉拔、锻造和粉末冶金工艺技术单独或组合获得，形成其截面呈不同图案的币章坯棒，通过真空热处理后再经过切割工艺获得币章坯材，该币章坯材可作造币用币坯、制章用章坯和制徽用徽坯。

Description

金属管镶套层叠拼嵌金属棒的币章坯材及制备方法 技术领域
本发明涉及硬币、流通币、纪念币(章)徽章及筹码(游戏币)的制造领域，更具体地说，本发明涉及一种图案精美、识别性能和防伪性能强的币章坯材及制备方法。
背景技术
目前世界上各个国家在高面值流通硬币，纪念币的生产制造过程上普遍广泛应用了双金属造币技术，其防伪特征明显，机读性能可靠稳定，生产效率高，加速了产能扩大。从1982年至今数十个国家，生产了近千个品种的双金属硬币。随之，在欧元区及部分国家都有制假的双金属币出现，于是各个国家对造币的防伪又提出新的要求。近年来法国、韩国等少数国家，采用各种金属板材冲压芯和环，然后依次镶套，再经过印花机印制，做成3个金属色泽效果，防伪效果有了新的提高，但这种生产工艺制作成本高、效率低、设计受局限。
目前金属纪念币及各种徽章的制作工艺与之类似，也存在上述问题。筹码(游戏币)作为一种货币载体，防伪功能要求更高。由于不受国家金融机构管控，因此设计空间和材质使用范围很广，防伪技术应用也是种类繁多。目前高端的一般采用内部嵌入芯片的塑料、陶瓷或有机复合材料制作，但存在成本高、手感差、使用寿命短等缺陷。制作双(多)色币材的方式，采用冲压方式组合，仅限于简单对称图形，花色单一，同时坯材冲压工艺材料利用率低。目前现有技术中有种采用金属套管和冷拉拔的方法制成金属币章坯棒料，再切割成硬币、章坯饼(专利申请公布号CN102293487A)，这种方法在图案空间设计、制造工艺方面有了长足的进步，但仍未摆脱图案设计呆板、缺乏艺术感、工艺相对简单从而导致识别防伪功能的降低等弊端，特别是单一的拉拔工艺，容易产生金属的结合力不强，进而导致两种或两种以上金属之间产生松动，影响币章坯材的质量。
发明内容
本发明的目的是为了克服现有技术的不足，提供一种金属管镶套层叠拼嵌金属棒的币章坯材及制备方法，来改善和提高目前造币行业制造及防伪水平。
本发明的目的是通过以下技术方案实现的：
一种金属管镶套层叠拼嵌金属棒的币章坯材。所述币章坯材由一根或一根以上金属管 镶套层叠拼嵌金属棒呈币章坯棒后、经径向切割形成，所述层叠拼嵌金属棒由两层或两层以上的金属棒径向叠压复合而成，所述币章坯材的截面为多种几何图案及异形图案。
本发明的目的还可以通过以下技术方案实现的：
所述的层叠拼嵌金属棒包括管、棒和型材。所述的层状复合金属棒为有色金属及其合金、黑色金属及其合金和贵金属及其合金。所述层叠拼嵌金属棒复合镍铁合金。
金属管镶套层叠拼嵌金属棒的币章坯材涉及一种制备方法：
由外层金属管和内层层叠拼嵌金属棒通过挤压、轧制、拉拔、锻造和粉末冶金工艺技术单独或组合获得，形成其截面呈不同图案的币章坯棒，通过真空热处理后，再经过切割工艺获得币章坯材，其具体步骤如下：
一、金属管的制备：
a.采用金属挤压或铸造工艺获得金属毛坯管；
b.毛坯管经过检查和表面处理后送入皮尔格冷轧管机进行孔型轧制；
c.轧制后的毛坯管经过检查放入拉拔机进行定径拉拔，通过拉拔技术获得设计尺寸和形状的金属管，金属管壁厚公差控制在±0.1mm；
d.拉拔后的管材进行脱脂除油和热处理，将管材硬度控制在150HV1以下；
e.管材热处理后通过旋转钢丝刷对管材内壁进行清刷处理，用压缩N2气将管材内壁金属碎屑等颗粒进行吹扫，然后对管材内部充满N2气密封处理后待用；
二、层叠拼嵌金属棒的制备：
a.层叠拼嵌金属棒由二种或二种以上不同或相同金属材质、不同或相同尺寸、不同或相同形状的金属材料相互包覆、嵌套和叠压复合而成；
b.组成层叠拼嵌金属棒的个体材料，其外形和尺寸，可采用挤压、轧制、锻造、拉拔、粉末冶金工艺单独或组合获得，材料尺寸公差控制在±0.05mm；
c.制成的个体材料经过表面喷砂、剥皮、刻花等粗化工艺和脱脂处理后，根据其特性，选择合适的温度进行热处理，将材料硬度控制在150HV1以下；
d.热处理后的个体材料，根据图案设计要求组装成条状待用；
三、金属管与层叠拼嵌金属棒的镶套：
a.将制作好的层叠拼嵌金属棒通过机械装置送入金属管内，经过缩头机构将一端碾压定位，避免内层各金属相互错位，根据复合工艺要求，将经过缩头碾压的一端放入轧制、拉拔和锻压其中任意一种设备的入口处，进行相应工艺加工，使金属管与层叠拼嵌金属棒紧密结合在一起；
b.多根金属管镶套的制备方法：将已镶套层叠拼嵌金属棒的金属管穿入比其直径大的金属管内，经过缩头碾压的一端放入轧制、拉拔和锻压其中任意一种设备的入口处，进行相应工艺加工，使外圈金属管紧密镶套内圈金属管，以此类推，直至完成多根金属管镶套层叠拼嵌金属棒的币章坯棒；
四、币章坯棒的热处理：
a.将币章坯棒头尾进行定尺切除，然后送入真空热处理炉进行钎焊或扩散退火，根据金属性质，选择合适的温度，保温2～5h，根据复合材料钎焊或扩散退火工艺要求，真空热处理时可添加H2、N2、Ar气体；
五、币章坯棒的切片：
a.将热处理冷却后的币章坯棒进行矫直，弯曲度控制在1/1000mm以下；
b.将矫直后的币章坯棒放入金属切片机床按硬币、章、徽厚度要求进行切割，切割后获得币章坯材，其厚度公差控制在±0.06mm以下。
与现有技术相比，本发明有以下有益效果：
(1)利用不同金属的自然色彩和相互叠压组成的图案制作硬币、章、徽具有多样性、艺术性，视觉冲击力强；
(2)加工工艺复杂、技术含量高、电磁信号稳定，具有很强的防伪性和很高的公众识别度；
(3)耐磨损，使用寿命长；
(4)可以根据机读要求，将特殊识别材料利用层状金属复合技术叠压在一起，达到机读防伪的目的；
(5)较之传统板料冲裁落料制作硬币、章、徽的加工工艺，材料利用率提高5～10％，并且有较大的提升空间，可使材料成本大大降低；
(6)镶套工艺采用轧制、锻压技术，各层金属之间的结合强度较拉拔工艺大，不会出现层间松动的缺陷。
附图说明
图1、图2、图3、图4、图5为本发明截面示意图；
图中：1金属管，2层叠拼嵌金属棒。
具体实施方式
如图1至图5所示：本发明的币章坯材是由外层金属管1和内层层叠拼嵌金属棒2通过挤压、孔型轧制、拉拔、锻造工艺，紧密组合在一起，形成不同形状的币章坯棒，通过真空热处理后，再经过切割工艺获得币章坯材，即为币坯、章坯和徽坯。
外层金属管1的制备：采用金属挤压或铸造工艺获得金属毛坯管，毛坯管经过检查和表面处理后送入皮尔格冷轧管机进行孔型轧制，轧制后的管材经过检查放入拉拔机进行定径拉拔，通过拉拔技术获得设计尺寸和形状的金属管材，管材壁厚公差控制在±0.1mm。拉拔后的管材进行脱脂除油和热处理，将管材硬度控制在150HV1以下。管材热处理后通过旋转钢丝刷对管材内壁进行清刷处理，用压缩N2气将管材内壁金属碎屑等颗粒进行吹扫，然后对管材内部充满N2气密封处理后待用。
内层层叠拼嵌金属棒2的制备：内层层叠拼嵌金属棒2，一般由二种或二种以上不同或相同的金属材质、不同或相同的尺寸、不同或相同形状的金属棒叠压、堆砌或套装组成。每根金属棒的外形和尺寸，可采用挤压、轧制、锻造、拉拔、粉末冶金工艺单独或组合获得，材料尺寸公差控制在±0.05mm。制成的材料经过表面喷砂、剥皮、刻花等粗化工艺和脱脂处理后，根据其特性，选择合适的温度进行热处理，将材料硬度控制在150HV1以下，热处理后的材料，根据图案设计要求叠压、堆砌或套装组合在一起形成条状待用。
外层金属管1与内层层叠拼嵌金属棒2的复合：将事先制作好的层叠拼嵌金属棒通过机械装置送入外层金属管1管内，经过缩头机构将一端碾压定位，避免内层各金属相互错位。根据复合工艺要求，将经过缩头碾压的一端放入事先选择的轧制、拉拔或锻压其中任意一种设备的入口处，进行相应工艺加工，使外层金属管1紧密镶套内层层叠拼嵌金属棒2。
多根金属管1镶套层叠拼嵌金属棒2是将已镶套层叠拼嵌金属棒2的金属管1穿入比其直径大的金属管内，经过缩头碾压的一端放入轧制、拉拔和锻压其中任意一种设备的入口处，进行相应工艺加工，使外圈金属管紧密镶套内圈金属管，以此类推，直至完成金属管1镶套层叠拼嵌金属棒2的币章坯棒(参见图3至图5)。
币章坯棒的热处理：将币章坯棒头尾进行定尺切除，然后送入真空热处理炉进行钎焊或扩散退火，根据金属性质，选择合适的温度，保温2～5h。根据组合材料钎焊或扩散退火工艺要求，真空热处理时可添加H2、N2、Ar气体。
币章坯棒的切片：将热处理冷却后的币章坯棒进行矫直，弯曲度控制在1/1000mm以下。将矫直后的币章坯棒放入金属切片机，按硬币、章、徽厚度要求进行切割，切割后获得的金属坯材，其厚度公差控制在±0.06mm以下。
实施例1
结合图1用实施例说明本发明的具体实施方式：
如图1所示：币章坯棒由金属管1镶套层叠拼嵌金属棒2构成。金属管1采用牌号为C70600(ASTM)，规格为Ф35×4.5mm，长度为6000mm的铜镍合金管一根。铜镍合金管材采用挤压→孔型轧制→拉拔→矫直→定尺锯切→热处理工艺获得。Ф35×4.5mm铜镍合金管外径公差为±0.15mm，壁厚公差为±0.03mm，弯曲度控制在3/1000mm以下，热处理硬度控制在150HV1以下。管材经检查没有起皮、裂纹、夹杂等表面缺陷。层叠拼嵌金属棒2由两根截面为“D”形金属棒和一根截面为鼓型的长方形金属棒组成。选取的金属牌号为C68700(ASTM)，截面为“D”形、规格为21.2×8mm，长度为6500mm的金属棒2根。截面为长方鼓型金属棒牌号为C11000(ASTM)，规格为22×6mm，长度为6500mm的金属棒1根。上述金属棒采用连续挤压→拉拔→矫直→定尺锯切→热处理工艺获得。形状尺寸公差为±0.03mm，弯曲度控制在2/1000mm以下，热处理硬度控制在150HV1以下。金属棒经检查没有起皮、裂纹、夹杂等表面缺陷。对准备好的Ф35×4.5mm铜镍合金管内壁用旋转钢丝刷清理后用N2气进行吹扫，确保没有油污、尘粒等，充入氮气后密封待用。截面为“D”形和长方鼓型金属棒表面采用80目铁砂喷砂处理，以表面出现细密的凹坑为佳。将清理好的“D”形和鼓型长方形金属棒按设计图案进行叠装，一端用电焊熔接固定，熔接长度控制在100mm以内，另一端自由。将叠装好的金属棒经过电焊熔接的一端通过机械夹送装置穿入事先准备好的铜镍合金金属管内，将金属管的一端与有电焊熔接一端的金属棒通过金属缩头机压实，压缩长度控制在150mm以内。将压实的一端放入LD30多排辊轧管机上料端口，轧辊轧制规格为Ф30mm，调节送料进给量为10～20mm，轧制速度80次/分钟，然后开始轧制，将坯料轧成外径为Ф30mm的币章坯棒。将轧制好的外径为Ф30mm的金属币章坯棒头尾各切除200mm，从切面检查复合效果。然后对币章坯棒表面进行除油处理，送入真空热处理炉，充入H2气，进行真空钎焊处理，温度控制在800℃，保温2小时。真空钎焊处理后的币章坯棒硬度≤150HV1。将退火后的币章坯棒通过辊式矫直机进行矫直，弯曲度控制在1/1000mm以下。将矫直后的币章坯棒放入金属切片机进行径向切割，便获得图1所示的币章坯材。该坯材可以用来做为造币、制章、制徽和筹码(游戏币)等需要防伪功能的坯材。
实施例2
结合附图2用实施例说明本发明的具体实施方式：
如图2所示：金属管1与两种规格相同、形状对称的层叠拼嵌金属棒2镶套构成截面 呈“太极图”的币章坯材。金属管1采用牌号为C71500(ASTM)，规格为Ф35×5mm，长度为5000mm的铜镍合金管一根。铜镍合金管材采用挤压→孔型轧制→拉拔→矫直→定尺锯切→热处理工艺获得。Ф35×5mm铜镍合金管外径公差为±0.15mm，壁厚公差为±0.03mm，弯曲度控制在3/1000mm以下，热处理硬度控制在150HV1以下。管材经检查没有起皮、裂纹、夹杂等表面缺陷。“太极图”金属棒2由金属牌号为C11000(ASTM)和C26000(ASTM)的两种金属棒2组成，组合规格为外径Ф20mm，长度为6000mm的金属棒各1根。金属棒2采用连续挤压→拉拔→矫直→定尺锯切→热处理工艺获得。形状尺寸公差为±0.03mm，弯曲度控制在2/1000mm以下，热处理硬度控制在150HV1以下。金属棒2经检查内外表面没有起皮、裂纹、夹杂等表面缺陷。对准备好的Ф35×5mm金属管2内壁用旋转钢丝刷清理后用N2气进行吹扫，确保没有油污、尘粒等，充入N2气密封后待用。金属棒2表面采用80目铁砂喷砂处理，以表面出现细密的凹坑为佳，喷砂工艺在复合前进行，尽快使用，避免二次氧化。将喷砂后的两根金属棒2组装在一起，一端用电焊熔接固定后经机械装置穿Ф35×5mm金属管1内，将金属管1的一端与有电焊熔接一端的金属棒2通过金属缩头机压实，压缩长度控制在150mm以内。将组装好的金属管1压实的一头送入Ф40旋锻(径向锻造)机入口，锻造模具规格为Ф30mm，锻造频率1200次/分钟，送料速度10mm/s。经过锻造后，金属管1与层叠拼嵌金属棒2紧密结合在一起，形成新的币章坯棒，币章坯棒规格为Ф30mm，外圆公差为±0.03mm。将锻造好的外径为Ф30mm的金属币章坯棒头尾各切除200mm，从切面检查复合效果。然后对币章坯棒表面进行除油处理，送入真空热处理炉，充入H2气，进行扩散退火处理，温度控制在800℃，保温2小时。扩散退火处理后的币章坯棒硬度≤150HV1。将退火后的币章坯棒通过辊式矫直机进行矫直，弯曲度控制在1/1000mm以下。将矫直后的币章坯棒放入金属切片机进行径向切割，便获得图2结构的币章坯材。该币章坯材可以用来作为造币、制章、制徽和筹码(游戏币)等需要防伪功能的坯材。

Claims (5)

  1. 一种金属管镶套层叠拼嵌金属棒的币章坯材，其特征在于：所述币章坯材由一根或一根以上金属管镶套层叠拼嵌金属棒呈币章坯棒后、经径向切割形成，所述层叠拼嵌金属棒由两层或两层以上的金属棒径向叠压复合而成，所述币章坯材的截面为多种几何图案及异形图案。
  2. 根据权利要求1所述的金属管镶套层叠拼嵌金属棒的币章坯材，其特征在于：所述的层叠拼嵌金属棒包括管、棒和型材。
  3. 根据权利要求2所述的金属管镶套层叠拼嵌金属棒的币章坯材，其特征在于：所述的层叠拼嵌金属棒为有色金属及其合金、黑色金属及其合金和贵金属及其合金。
  4. 根据权利要求3所述的金属管镶套层叠拼嵌金属棒的币章坯材，其特征在于：所述层叠拼嵌金属棒复合镍铁合金。
  5. 根据权利要求1所述的金属管镶套层叠拼嵌金属棒的币章坯材涉及一种制备方法，由外层金属管和内层层叠拼嵌金属棒通过挤压、轧制、拉拔、锻造和粉末冶金工艺技术单独或组合获得，形成其截面呈不同图案的币章坯棒，通过真空热处理后，再经过切割工艺获得币章坯材，其具体步骤如下：
    一.金属管的制备：
    a.采用金属挤压或铸造工艺获得金属毛坯管；
    b.毛坯管经过检查和表面处理后送入皮尔格冷轧管机进行孔型轧制；
    c.轧制后的毛坯管经过检查放入拉拔机进行定径拉拔，通过拉拔技术获得设计尺寸和形状的金属管，金属管壁厚公差控制在±0.1mm；
    d.拉拔后的管材进行脱脂除油和热处理，将管材硬度控制在150HV1以下；
    e.管材热处理后通过旋转钢丝刷对管材内壁进行清刷处理，用压缩N2气将管材内壁金属碎屑等颗粒进行吹扫，然后对管材内部充满N2气密封处理后待用；
    二.层叠拼嵌金属棒的制备：
    a.层叠拼嵌金属棒由二种或二种以上不同或相同金属材质、不同或相同尺寸、不同或相同形状的金属材料相互包覆、嵌套和叠压复合而成；
    b.组成层叠拼嵌金属棒的个体材料，其外形和尺寸，可采用挤压、轧制、锻造、拉拔、粉末冶金工艺单独或组合获得，材料尺寸公差控制在±0.05mm；
    c.制成的个体材料经过表面喷砂、剥皮、刻花等粗化工艺和脱脂处理后，根据其特性， 选择合适的温度进行热处理，将材料硬度控制在150HV1以下；
    d.热处理后的个体材料，根据图案设计要求组装成条状待用；
    三.金属管与层叠拼嵌金属棒的镶套：
    a.将制作好的层叠拼嵌金属棒通过机械装置送入金属管内，经过缩头机构将一端碾压定位，避免内层各金属相互错位，根据复合工艺要求，将经过缩头碾压的一端放入轧制、拉拔和锻压其中任意一种设备的入口处，进行相应工艺加工，使金属管与层叠拼嵌金属棒紧密结合在一起；
    b.多根金属管镶套的制备方法：将已镶套层叠拼嵌金属棒的金属管穿入比其直径大的金属管内，经过缩头碾压的一端放入轧制、拉拔和锻压其中任意一种设备的入口处，进行相应工艺加工，使外圈金属管紧密镶套内圈金属管，以此类推，直至完成多根金属管镶套层叠拼嵌金属棒的币章坯棒；
    四.币章坯棒的热处理：
    a.将币章坯棒头尾进行定尺切除，然后送入真空热处理炉进行钎焊或扩散退火，根据金属性质，选择合适的温度，保温2～5h，根据复合材料钎焊或扩散退火工艺要求，真空热处理时可添加H2、N2、Ar气体；
    五.币章坯棒的切片：
    a.将热处理冷却后的币章坯棒进行矫直，弯曲度控制在1/1000mm以下；
    b.将矫直后的币章坯棒放入金属切片机床按硬币、章、徽厚度要求进行切割，切割后获得币章坯材，其厚度公差控制在±0.06mm以下。
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