CN100515802C - Technological process of making coin with multiple-surface concealed engraving - Google Patents
Technological process of making coin with multiple-surface concealed engraving Download PDFInfo
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- CN100515802C CN100515802C CNB2004100206922A CN200410020692A CN100515802C CN 100515802 C CN100515802 C CN 100515802C CN B2004100206922 A CNB2004100206922 A CN B2004100206922A CN 200410020692 A CN200410020692 A CN 200410020692A CN 100515802 C CN100515802 C CN 100515802C
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- engraving
- multiaspect
- conical surface
- master pattern
- latent image
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000005516 engineering process Methods 0.000 claims description 36
- 239000011159 matrix material Substances 0.000 claims description 35
- 230000007306 turnover Effects 0.000 claims description 8
- 238000000137 annealing Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000005498 polishing Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000013401 experimental design Methods 0.000 description 1
- 238000010147 laser engraving Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
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Abstract
The technological process of making coin with multiple-surface concealed engraving includes the following steps: 1. making concealed image engraving locus with female pattern dot structure; 2. making multiple-surface concealed image for prototype mold and determining the basic technological parameters including half conic angle alpha of 45-60 deg, bottom carving work angle beta equal to 0.5 alpha and maximum bottom carving angle W; and 3. making multiple-surface concealed image mold. The present invention adopts laser carving technique in making various patterns, and the concealed patterns may be observed in different angles. The present invention is used in anti-fake of currency coin and commemorative coin, and has significance in raising their grade and anti-fake capacity.
Description
Affiliated technical field
The present invention relates to a kind of process with the stealthy engraving technology manufacturing of multiaspect coin, belong to the coin manufacturing technology, especially gold and silver coin (chapter), common commemorative coin (chapter), circulation currency system are done technology.
Background technology
In recent years, along with development of technology and development, RMB faces by imitated danger more and more serious, has had increasing counterfeit money to appear at the field of circulation.Therefore, remove outside the measures such as adopting the money flow of legal system standard, increase the coin technology content, improve imitated threshold, development and application advanced person's anti-counterfeiting technology becomes the severe problem that coinage enterprise faces.At present, there has been multinomial anti-counterfeiting technology successfully to develop and be applied to the coin product.As limit portion roll the word technology, the silk tooth roll word technology, groove type technology, micro text technology and double-side hidden engraving technology etc.Wherein, the double-side hidden engraving technology is state key technological development (tackling key problem) project, has applied for secret patent.Adopt the double-side hidden engraving technology to increase the anti-counterfeiting performance of product, obtained effect preferably.And the stealthy engraving technology of multiaspect is to innovate on the basis of double-side hidden engraving technology and develop.Can predict, the stealthy engraving technology of multiaspect will with other anti-counterfeiting technologies together, become one of false proof means of important popularity of coin or souvenir badge.
Summary of the invention
The purpose of this invention is to provide a kind of process of making coin with the stealthy engraving technology of multiaspect, this method is in carving area, the equidistant dot matrix groove structure of internal or female screw that at first to obtain by one group of section be the conical surface, secondly, each image generates on the conical surface of all same inclinations, and promptly the substrate of same image has been formed on the inclined-plane of equidirectional.Dot matrix around above-mentioned setting is arranged groove, observes with certain angle, can observe the above independently image of at least three groups.Different images replaces appearance according to the difference of the angle of light: can see an image from a certain angle, and when sculptured surface tilts or during upset, this picture drop-out and another image occurs.
The present invention comprises the steps: with the process of the stealthy engraving technology manufacturing of multiaspect coin
1. make latent image engraving track
Engraving dot matrix conical surface track forms the equidistant dot matrix groove structure of internal or female screw on the boss of straight carving mould;
Determine the relative position of image on the dot matrix conical surface;
Determine the dot matrix conical surface that all and this image intersect;
With the above-mentioned dot matrix conical surface is the standard equilbrium position, produces the engraving track in the other orientation of equilbrium position.
2. make grand master pattern multiaspect latent image
Straight carving grand master pattern base carries out annealing in process;
Determining of basic fundamental parameter:
Determine the degree of depth h of the dot matrix conical surface, degree of depth h generally is no more than 0.10 millimeter;
α is 1/2 jiao of the conical surface, α=45 °～60 °; β is incised work angle, bottom, β=α/2; W is the Breadth Maximum of bottom engraving, W=graver point of a knife width;
The engraving of above-mentioned grand master pattern multiaspect latent image adopts engraving machine to finish;
3. make multiaspect latent image mould
After the stealthy carved image refine of straight carving grand master pattern multiaspect that above-mentioned engraving is finished, under the atmosphere protection condition, heat-treat operation;
The above-mentioned grand master pattern tip conical surface is carried out polishing;
To pressing the blank of submodule to carry out annealing in process in order to turn over;
Turn over the pressure submodule with above-mentioned grand master pattern, produce mould with multiaspect latent image.
The described making grand master pattern of the above-mentioned process of the present invention multiaspect latent image step also comprises: directly carve the grand master pattern sculptured surface perpendicular to the graver axis; Graver rises and falls the position in the same side, repeatedly feed, running orbit direction unanimity.
The basic fundamental parameter can also be defined as in the described making grand master pattern of the above-mentioned process of the present invention multiaspect latent image step:
α is 1/2 jiao of the conical surface, α=48-55 °; β is incised work angle, bottom, β=α/2.
The basic fundamental parameter can also be defined as in the described making grand master pattern of the above-mentioned process of the present invention multiaspect latent image step:
α is 1/2 jiao of the conical surface, α=50 °; β is incised work angle, bottom, β=α/2=25 °.
The invention has the beneficial effects as follows:
The present invention uses laser engraving technology to make patterns such as the stealthy literal of multiaspect, figure and grid on the coinage mould, realize that the multiaspect stealth technique combines with traditional mould making process, in order to improve the popular anti-counterfeiting performance of coin product, satisfy technology, application approach and the specification requirement of coin production in enormous quantities.The stealthy engraving technology of multiaspect is that utilization mathematical knowledge and computer graphics techniques design, and carves out by all types of English alphabets and Chinese character the multiaspect pattern (literal) of formation on the coinage mould.From a plurality of angles of cut for (360 °/n) direction can be observed a plurality of stealthy literal, has obtained very good effect.The stealthy engraving technology of multiaspect is the popular anti-counterfeiting technologies of novel and effective, is used for gold and silver coin (chapter), common commemorative coin so that coin circulation false proof, and product technology content, class and anti-counterfeit capability are significant for improving.
Description of drawings
Fig. 1 is the schematic diagram of the stealthy engraving technology of multiaspect.
Fig. 2 is the profile of conical surface dot matrix.
Fig. 3-Fig. 5 is the generative process of " ten thousand " word engraving track.
The specific embodiment
Describe the present invention in detail below in conjunction with drawings and Examples:
As shown in Figure 1,1-conical surface dot matrix; 2,3,4,5-is respectively down, left, last, right sculptured surface.
In carving area, the equidistant dot matrix groove structure of internal or female screw that at first should to obtain by one group of section be the conical surface, secondly, each image generates on the conical surface of all same inclinations, and promptly the substrate of same image has been formed on the inclined-plane of equidirectional.
The readability of image directly depends on density, cone angle, product property, the engraving area of the conical surface dot matrix of engraving, and conical surface dot matrix distance and inclination angle of inclined plane also influence the definition of image.
As shown in Figure 2, basic fundamental parameter of the present invention, α is 1/2 jiao of the conical surface; β is incised work angle, bottom, and W is the Breadth Maximum of bottom engraving.
Accurately strictly determining the spacing and the degree of depth of W, α, β value, the dot matrix conical surface, is the key that solves following problems:
1) is applied to the possibility of coinage;
2) prevent to copy with traditional method for anti-counterfeit;
3) production technology of base cake and mould;
4) die life.
In order to adapt to the requirement of molding and imprint process, must the degree of depth of the dot matrix conical surface be limited (generally being no more than 0.10 millimeter).In this case, cone angle has significant effects to the definition of latent image: α is more little, and image is clear more, and imitation difficulty is big; α is big more, and image definition is poor more, is easy to conventional method imitated.In addition, incised work angle β also produces certain influence to the definition of latent image, and within the specific limits, β is more littler than α, and then latent image is clear more.In addition, must limit bottom maximum engraving width W, W is big more, and conical surface dot matrix local strength is low more, is unfavorable for Mold Making and die life-span, therefore must rationally set the W value.
Usually, W, α, β set value as follows:
α=45 °～60 °; β=α/2; W=graver point of a knife width.
Track is accurate, latent image is clear in order to ensure carving, and must use the engraving equipment of enough machining accuracies and positioning accuracy.The present invention adopts the vertical CNC engraving machine of LANG, and these facility have following working ability: 1) drive resolution ratio＜0.001 millimeter
2) peak acceleration 0.14 meter per second
2
3) main shaft maximum (top) speed 5000～60000rpm
Embodiment 1:
The present invention adopts the stealthy engraving technology of multiaspect to carry out experimental design and makes and commemorate silver-colored chapter, is that 90 ° direction can be observed " uniting like one man " four stealthy literal from four angles of cut, has obtained very good effect.
1. make latent image engraving track
According to the stealthy engraving technology principle of multiaspect, stealthy engraving track is composited by the dot matrix conical surface and latent image.As shown in Figure 3-Figure 5, carve the generative process of track for " ten thousand " word.
Wherein Fig. 3 is a track of carving the dot matrix conical surface of carving on the boss of mould straight, Fig. 4 is the relative position of " ten thousand " word on the dot matrix conical surface, Fig. 5 is the dot matrix conical surface that all and this word intersect, with these balance dot matrix conical surfaces is normal place, below the equilbrium position, produce the engraving track, as shown in Figure 1.Like this, observe, just can clearly see " ten thousand " word, and can not find from other directions from certain angle of oblique upper of stealthy carving area.Other three stealthy text engraving track generation reasons are identical.Therefore, compare, a plurality of (more than at least three) image can be arranged in theory by stealth with the two-way stealth technique of parallel groove structure.All these tracks generate and can finish with CAD software.
2. make grand master pattern multiaspect latent image
At first,, accurate positioning smooth in order to ensure image should make the strictness of straight carving grand master pattern sculptured surface perpendicular to the graver axis, and therefore, the straight carving of reply grand master pattern carries out levelling and centering before the engraving, measures the depth of parallelism after being installed, and is no more than 0.02 millimeter.
Secondly, directly carve the mould base and should carry out annealing in process, avoid tool wear and jack knife.
Once more, choose reasonable is carved parameter substantially.After taking all factors into consideration invisible structure intensity and definition, basic parameter is determined as follows: α=50 °, β=22.5 °, W=0.03 millimeter.Simultaneously, require the point of a knife width error less than 0.01 millimeter, the nose angle Size Error is no more than 0.5 °.
At last, rationally determine the engraving scheme.Prior to testing on the copper mould base, observe stealthy effect after definite engraving parameter, adjust parameters such as α, β, W in view of the above, after obtaining promising result, formally carve again.
For obtaining promising result, take following measure in the test:
Graver rises and falls the position in the same side, running orbit direction unanimity;
Sculptured surface crimp is avoided in repeatedly feed.
3. make multiaspect latent image mould
Manually refine after the stealthy engraving of grand master pattern multiaspect structure engraving finishes, the referable heat treatment step.But add the atmosphere protection of pining for to implement strictness in heat treatment, avoid the sculptured surface oxidation.
Answer annealed processing in order to turn over the blank of pressing submodule, reach the purpose that reduces resistance of deformation and improve plasticity, in addition, turn over and press the preceding reply grand master pattern tip conical surface to carry out polishing, prevent that " shadow " defective from producing.
Embodiment 2:
1. make latent image engraving track
Engraving dot matrix conical surface track forms the equidistant dot matrix groove structure of internal or female screw on the boss of straight carving mould;
Determine the relative position of image on the dot matrix conical surface;
Determine the dot matrix conical surface that all and this image intersect;
With the above-mentioned dot matrix conical surface is the standard equilbrium position, produces the engraving track in the other orientation of equilbrium position.
2. make grand master pattern multiaspect latent image
Straight carving grand master pattern base carries out annealing in process;
Determining of basic fundamental parameter:
The degree of depth h that determines the dot matrix conical surface is 0.08 millimeter;
α is 1/2 jiao of the conical surface, α=45 °; β is incised work angle, bottom, β=α/2=22.5 °; W is the Breadth Maximum of bottom engraving, W=graver point of a knife width;
Straight carving grand master pattern sculptured surface is perpendicular to the graver axis;
Graver rises and falls the position in the same side, repeatedly feed, running orbit direction unanimity;
The engraving of above-mentioned grand master pattern multiaspect latent image adopts the vertical CNC engraving machine of LANG to finish;
3. make multiaspect latent image mould
After the manual refine of the stealthy carved image of straight carving grand master pattern multiaspect that above-mentioned engraving is finished, under the atmosphere protection condition, heat-treat operation;
The above-mentioned grand master pattern tip conical surface is carried out polishing;
To pressing the blank of submodule to carry out annealing in process in order to turn over;
Turn over the pressure submodule with above-mentioned grand master pattern, produce mould with multiaspect latent image.
Embodiment 3:
1. make latent image engraving track
2. make grand master pattern multiaspect latent image
The degree of depth h that determines the dot matrix conical surface is 0.06 millimeter;
α is 1/2 jiao of the conical surface, α=60 °; β is incised work angle, bottom, β=α/2=30 °; W is the Breadth Maximum of bottom engraving, W=graver point of a knife width;
3. make multiaspect latent image mould.All the other contents of embodiment 3 are with embodiment 1.
Claims (4)
- The stealthy engraving technology of 1 usefulness multiaspect is made the method for coin, it is characterized in that it comprises the steps:(1). make latent image engraving trackEngraving dot matrix conical surface track forms the equidistant dot matrix groove structure of internal or female screw on the boss of straight carving mould;Determine the relative position of image on the dot matrix conical surface;Determine the dot matrix conical surface that all and this image intersect;With the above-mentioned dot matrix conical surface that intersects with this image is the standard equilbrium position, produces the engraving track in other different azimuth of equilbrium position;(2). make grand master pattern multiaspect latent imageStraight carving grand master pattern base carries out annealing in process;Determining of basic fundamental parameter:Determine the degree of depth h of the dot matrix conical surface, degree of depth h is no more than 0.10 millimeter;α is 1/2 jiao of the conical surface, α=45 °～60 °; β is incised work angle, bottom, β=α/2; W is the Breadth Maximum of bottom engraving, W=graver point of a knife width;The engraving of above-mentioned grand master pattern multiaspect latent image adopts engraving machine to finish;(3). make multiaspect latent image mouldAfter the stealthy carved image refine of straight carving grand master pattern multiaspect that above-mentioned engraving is finished, under the atmosphere protection condition, heat-treat operation;The above-mentioned dot matrix conical surface that intersects with this image is carried out polishing;To pressing the blank of submodule to carry out annealing in process in order to turn over;Turn over the pressure submodule with above-mentioned grand master pattern, produce mould with multiaspect latent image.
- 2. the method with the stealthy engraving technology manufacturing of multiaspect coin according to claim 1 is characterized in that also comprising in the described making grand master pattern multiaspect latent image step: directly carve the grand master pattern sculptured surface perpendicular to the graver axis; Graver rises and falls the position in the same side, repeatedly feed, running orbit direction unanimity.
- 3. according to claim 1ly make the method for coin, it is characterized in that being defined as of basic fundamental parameter in the described making grand master pattern multiaspect latent image step with the stealthy engraving technology of multiaspect:α is 1/2 jiao of the conical surface, α=48 °～55 °; β is incised work angle, bottom, β=α/2.
- 4. according to claim 1ly make the method for coin, it is characterized in that being defined as of basic fundamental parameter in the described making grand master pattern multiaspect latent image step with the stealthy engraving technology of multiaspect:α is 1/2 jiao of the conical surface, α=50 °; β is incised work angle, bottom, β=α/2=25 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100206922A CN100515802C (en) | 2004-06-08 | 2004-06-08 | Technological process of making coin with multiple-surface concealed engraving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100206922A CN100515802C (en) | 2004-06-08 | 2004-06-08 | Technological process of making coin with multiple-surface concealed engraving |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1706663A CN1706663A (en) | 2005-12-14 |
| CN100515802C true CN100515802C (en) | 2009-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100206922A Expired - Lifetime CN100515802C (en) | 2004-06-08 | 2004-06-08 | Technological process of making coin with multiple-surface concealed engraving |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100427320C (en) * | 2006-04-21 | 2008-10-22 | 中国印钞造币总公司 | Manufacturing method of metal surface multiple latent image and antifalse product made by said method |
| JP4961944B2 (en) * | 2006-10-24 | 2012-06-27 | 凸版印刷株式会社 | Display and printed matter |
| CN102332187B (en) * | 2011-09-30 | 2014-08-20 | 中钞长城金融设备控股有限公司 | Coin detection equipment |
| CN102488367B (en) * | 2011-12-20 | 2014-05-21 | 上海造币有限公司 | Nickel-clad steel coin by combining lines and fine patterns as well as making technology thereof |
| CN102488366B (en) * | 2011-12-20 | 2014-05-21 | 上海造币有限公司 | Nickel-coated steel coin with double-face hidden pattern, and manufacturing technology thereof |
| CN113545573A (en) * | 2021-07-23 | 2021-10-26 | 浙江运发实业有限公司 | Commemorative coin and anti-counterfeiting invisible method thereof |
-
2004
- 2004-06-08 CN CNB2004100206922A patent/CN100515802C/en not_active Expired - Lifetime
Non-Patent Citations (2)
| Title |
|---|
| 硬币防伪技术. 胡福庆，鲁国才.中国防伪报道，第1期. 2004 |
| 硬币防伪技术. 胡福庆，鲁国才.中国防伪报道，第1期. 2004 * |
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| CN1706663A (en) | 2005-12-14 |
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Address after: 100044 Beijing city Xicheng District Xizhimen Street No. 143 triumph building Patentee after: China Banknote Printing and Minting Group Co.,Ltd. Address before: 100044 Beijing city Xicheng District Xizhimen Street No. 143 Patentee before: CHINA BANKNOTE PRINTING AND MINTING Corp. |
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Granted publication date: 20090722 |