CN107716822A - A kind of oil pressure gold bar manufacture craft - Google Patents
A kind of oil pressure gold bar manufacture craft Download PDFInfo
- Publication number
- CN107716822A CN107716822A CN201710938204.3A CN201710938204A CN107716822A CN 107716822 A CN107716822 A CN 107716822A CN 201710938204 A CN201710938204 A CN 201710938204A CN 107716822 A CN107716822 A CN 107716822A
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- China
- Prior art keywords
- gold bar
- pressure
- gold
- sizing
- panels
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 181
- 239000010931 gold Substances 0.000 title claims abstract description 181
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 181
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 238000004513 sizing Methods 0.000 claims abstract description 69
- 238000003825 pressing Methods 0.000 claims abstract description 52
- 239000002994 raw material Substances 0.000 claims abstract description 15
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 38
- 239000011159 matrix material Substances 0.000 claims description 30
- 239000003921 oil Substances 0.000 claims description 28
- 238000004140 cleaning Methods 0.000 claims description 25
- 230000006835 compression Effects 0.000 claims description 14
- 238000007906 compression Methods 0.000 claims description 14
- 239000010720 hydraulic oil Substances 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 14
- 239000003814 drug Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 13
- 230000005021 gait Effects 0.000 claims description 12
- 238000005498 polishing Methods 0.000 claims description 12
- 239000012535 impurity Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000009966 trimming Methods 0.000 claims description 6
- 230000001680 brushing effect Effects 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 206010053615 Thermal burn Diseases 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/02—Preliminary treatment of metal stock without particular shaping, e.g. salvaging segregated zones, forging or pressing in the rough
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J3/00—Lubricating during forging or pressing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Adornments (AREA)
Abstract
The present invention relates to a kind of gold bar manufacture craft, specifically a kind of oil pressure gold bar manufacture craft, comprise the following steps：Pretreatment of raw material, first pressing, pressure-sizing and tail processing.The present invention can avoid producing the flaws such as burr, oil stain, shallow trace, lift premium.
Description
Technical field
The present invention relates to a kind of gold bar manufacture craft, specifically a kind of oil pressure gold bar manufacture craft.
Background technology
Gold bar is broadly divided into the commemorative special gold bar of collection and general system investment gold bar.Commemorative special gold bar is typically same
Can be to be worth price higher above higher than its golden raw material to issue, its price is usually fixed；General system investment gold bar is relative
International golden raw material premium is relatively low, and price changes at any time in company with international price of gold.
The premium height of commemorative special gold bar is primarily limited to its manufacture craft, and sophisticated technologies are more superior, and premium is higher,
But current commemorative special gold bar is limited by manufacture craft, the flaw such as generally existing burr, oil stain, shallow trace, causes its premium
It is relatively low.
The content of the invention
The technical problems to be solved by the invention are to provide one kind and avoid producing the flaws such as burr, oil stain, shallow trace, and lifting is overflow
The oil pressure gold bar manufacture craft of valency.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：A kind of oil pressure gold bar manufacture craft, including following step
Suddenly：
S1, pretreatment of raw material：
A, the raw material gold basis of gold content more than 99.99% is taken to be sized cutting into some pieces of gold bullions；
B, take the gold bullion to be placed on tablet press machine tabletting repeatedly to its softening, then cut into gold bar；
C, take the gold bar to be heated to reddening at a temperature of 800 DEG C~950 DEG C, then immerse dilute sulfuric acid and reject the gold bar
The impurity or spot of surface attachment；
S2, first pressing：
A, the first compression mould being made up of the thick die mould piece of two panels is taken, and is applied respectively in the thick relative side of die mould piece described in two panels
Brush hydraulic oil；
B, the gold bar in S1 after step c processing of learning from else's experience is placed between thick die mould piece described in two panels, then will it is described at the beginning of pressing mold
Tool is placed on the workbench of hydraulic press；
C, the output end of the hydraulic press grants the pressure of just 50 tons~60 tons of the compression mould, at the uniform velocity arrives at setting stroke
After return to initial bit, and so on 2~3 times, the gold bar then taken out between two pieces of thick die mould pieces obtains first pressing gold
Bar；
S3, pressure-sizing：
A, the hydraulic oil on the first pressing gold bar surface, and wiped clean are cleaned using alkalescent cleaning liquid medicine；
B, the coining die being made up of two panels pressure-sizing matrix is taken, the first pressing gold bar after cleaning is placed in smart described in two panels
Between die mould piece, then the coining die is placed on the workbench of the hydraulic press；
C, the output end of the hydraulic press grants the pressure of 200 tons~220 tons of the coining die, at the uniform velocity arrives at setting row
Initial bit is returned to after journey, and so on 3~5 times, the first pressing gold bar then taken out between two pieces of pressure-sizing matrix obtains
Pressure-sizing gold bar；
S4, tail processing：
A, by gold material side polishes smooth on the pressure-sizing gold bar, caused by two pieces of pressure-sizing matrix junctions；
B, can be dispatched from the factory after the pressure-sizing gold bar surface by grinding process being carried out into laser code.
The beneficial effects of the invention are as follows：
1st, because the gold bar is heated to reddening at a temperature of 800 DEG C~950 DEG C, gold bar surface described in heating process is attached
The most of impurity or spot progressively disengage the gold bar surface, then immerse dilute sulfuric acid then thoroughly by impurity or spot from institute
The rejecting of gold bar surface is stated, prevents impurity or spot to be pressurized during subsequent oil pressure and form burr, oil on the gold bar surface
The flaws such as stain, shallow trace, lift finished product premium；
2nd, in first pressing, using the lubrication property brushed in the hydraulic oil of the thick relative side of die mould piece described in two panels, coordinate
The pressure of hydraulic press output, ensure that the gold bar by the smooth preliminary die mould of the hydraulic press, obtains the first pressing gold bar, carried
High oil pressure producing efficiency；
3rd, in pressure-sizing, cleaning liquid medicine using the alkalescent will wipe after the hydraulic oil cleaning on the first pressing gold bar surface
Only, avoid the hydraulic oil from being stamped into the first pressing gold bar surface in the hydraulic press coining process, prevent the pressure-sizing
Gold bar surface produces oil stain, improves finished product premium；
4th, in pressure-sizing, using the pressure of hydraulic press output, first pressing gold bar described in pressure-sizing is repeated so that the first pressing gold
Bar is obtained the clear exquisite pressure-sizing gold bar of form, is lifted finished product premium by abundant die mould.
Further, step c in S1, the gold bar are placed in crucible and are heated to reddening at a temperature of 800 DEG C~950 DEG C.
The above-mentioned further beneficial effect of technical scheme is：Heated, be beneficial to using gold bar described in the crucibles
The gold bar is heated evenly, and is quickly reddened, and lifts producing efficiency.
Further, step c in S1, the dilute sulfuric acid are 10%~15% sulfuric acid.
The above-mentioned further beneficial effect of technical scheme is：The impurity or spot for ensureing the gold bar surface are thoroughly picked
Remove.
Further, a steps in S2, the relative side of thick die mould piece described in two panels are arranged as required to rough line respectively
Road profile.
The above-mentioned further beneficial effect of technical scheme is：It is easy to the gold bar to form first pressing form as needed.
Further, b step in S3, the relative side of pressure-sizing matrix is arranged as required to fine line respectively described in two panels
Road profile.
The above-mentioned further beneficial effect of technical scheme is：It is easy to the first pressing gold bar to form pressure-sizing form as needed.
Further, step c in S2, the output end gait of march of the hydraulic press is 5mm/s~6mm/s.
The above-mentioned further beneficial effect of technical scheme is：Ensure that the first pressing gold bar is steadily molded, do not deform upon, keep away
Exempt to produce substandard products or waste product.
Further, step c in S3, the output end gait of march of the hydraulic press is 2mm/s~3mm/s.
The above-mentioned further beneficial effect of technical scheme is：Ensure that the pressure-sizing gold bar is steadily molded, do not deform upon, keep away
Exempt to produce substandard products or waste product.
Further, step c in S2, the first pressing gold bar are taken by clamp or golden shovel between two pieces of thick die mould pieces
Go out.
The above-mentioned further beneficial effect of technical scheme is：By the pressure of the hydraulic press output during first pressing makes institute
Gold bar heating is stated, therefore the first pressing gold bar just more scalds one's hand, it is necessary to by clamp or golden shovel from two pieces described in compression mould
Taken out between the thick die mould piece, ensure the personal safety of operating personnel.
Further, b step in S3, pressure-sizing matrix described in two panels is using alkalescent cleaning liquid medicine cleaning, and wipe
Totally.
The above-mentioned further beneficial effect of technical scheme is：Ensure that the pressure-sizing matrix surface is adhered to without oil stain, it is ensured that institute
State pressure-sizing gold bar surface to produce without oil stain, lift finished product premium.
Further, a steps in S4, the gold material side of the pressure-sizing gold bar are completed by trimming, filing, frosted and polishing successively
Polishing.
The above-mentioned further beneficial effect of technical scheme is：Ensure the surprised gold bar gold material side be polished it is smooth.
Embodiment
The embodiment of technical solution of the present invention will be described in detail below.Following examples are only used for clearer
Ground illustrates technical scheme, therefore be only used as example, and can not be limited the scope of the invention with this.
Embodiment 1
A kind of oil pressure gold bar manufacture craft, comprises the following steps：
S1, pretreatment of raw material：
A, the raw material gold basis of gold content more than 99.99% is taken to be sized cutting into some pieces of gold bullions；
B, take the gold bullion to be placed on tablet press machine tabletting repeatedly to its softening, then cut into gold bar；
C, take the gold bar to be heated to reddening at a temperature of 800 DEG C, it is attached then to immerse the dilute sulfuric acid rejecting gold bar surface
The impurity or spot；
S2, first pressing：
A, the first compression mould being made up of the thick die mould piece of two panels is taken, and is applied respectively in the thick relative side of die mould piece described in two panels
Brush hydraulic oil；
B, the gold bar in S1 after step c processing of learning from else's experience is placed between thick die mould piece described in two panels, then will it is described at the beginning of pressing mold
Tool is placed on the workbench of hydraulic press；
C, the output end of the hydraulic press grants the pressure of just 50 tons of the compression mould, is returned after at the uniform velocity arriving at setting stroke
Initial bit, and so on 3 times, the gold bar then taken out between two pieces of thick die mould pieces obtains first pressing gold bar；
S3, pressure-sizing：
A, the hydraulic oil on the first pressing gold bar surface, and wiped clean are cleaned using alkalescent cleaning liquid medicine；
B, the coining die being made up of two panels pressure-sizing matrix is taken, the first pressing gold bar after cleaning is placed in smart described in two panels
Between die mould piece, then the coining die is placed on the workbench of the hydraulic press；
C, the output end of the hydraulic press grants the pressure of 200 tons of the coining die, is returned after at the uniform velocity arriving at setting stroke
Initial bit is returned, and so on 5 times, the first pressing gold bar then taken out between two pieces of pressure-sizing matrix obtains pressure-sizing gold bar；
S4, tail processing：
A, by gold material side polishes smooth on the pressure-sizing gold bar, caused by two pieces of pressure-sizing matrix junctions；
B, can be dispatched from the factory after the pressure-sizing gold bar surface by grinding process being carried out into laser code.
The beneficial effects of the invention are as follows：
Preferably, step c in S1, the gold bar are placed in crucible and are heated to reddening at a temperature of 800 DEG C.
Preferably, step c in S1, the dilute sulfuric acid are 10% sulfuric acid.
Preferably, a steps in S2, the relative side of thick die mould piece described in two panels are arranged as required to rough line respectively
Road profile.
Preferably, b step in S3, the relative side of pressure-sizing matrix is arranged as required to fine line respectively described in two panels
Road profile.
Preferably, step c in S2, the output end gait of march of the hydraulic press is 5mm/s.
Preferably, step c in S3, the output end gait of march of the hydraulic press is 2mm/s.
Preferably, step c in S2, the first pressing gold bar are taken by clamp or golden shovel between two pieces of thick die mould pieces
Go out.
Preferably, b step in S3, pressure-sizing matrix described in two panels is using alkalescent cleaning liquid medicine cleaning, and wipe
Totally.
Preferably, a steps in S4, the gold material side of the pressure-sizing gold bar are completed by trimming, filing, frosted and polishing successively
Polishing.
Embodiment 2
A kind of oil pressure gold bar manufacture craft, comprises the following steps：
S1, pretreatment of raw material：
A, the raw material gold basis of gold content more than 99.99% is taken to be sized cutting into some pieces of gold bullions；
B, take the gold bullion to be placed on tablet press machine tabletting repeatedly to its softening, then cut into gold bar；
C, take the gold bar to be heated to reddening at a temperature of 850 DEG C, it is attached then to immerse the dilute sulfuric acid rejecting gold bar surface
The impurity or spot；
S2, first pressing：
A, the first compression mould being made up of the thick die mould piece of two panels is taken, and is applied respectively in the thick relative side of die mould piece described in two panels
Brush hydraulic oil；
B, the gold bar in S1 after step c processing of learning from else's experience is placed between thick die mould piece described in two panels, then will it is described at the beginning of pressing mold
Tool is placed on the workbench of hydraulic press；
C, the output end of the hydraulic press grants the pressure of just 55 tons of the compression mould, is returned after at the uniform velocity arriving at setting stroke
Initial bit, and so on 2 times, the gold bar then taken out between two pieces of thick die mould pieces obtains first pressing gold bar；
S3, pressure-sizing：
A, the hydraulic oil on the first pressing gold bar surface, and wiped clean are cleaned using alkalescent cleaning liquid medicine；
B, the coining die being made up of two panels pressure-sizing matrix is taken, the first pressing gold bar after cleaning is placed in smart described in two panels
Between die mould piece, then the coining die is placed on the workbench of the hydraulic press；
C, the output end of the hydraulic press grants the pressure of 210 tons of the coining die, is returned after at the uniform velocity arriving at setting stroke
Initial bit is returned, and so on 4 times, the first pressing gold bar then taken out between two pieces of pressure-sizing matrix obtains pressure-sizing gold bar；
S4, tail processing：
A, by gold material side polishes smooth on the pressure-sizing gold bar, caused by two pieces of pressure-sizing matrix junctions；
B, can be dispatched from the factory after the pressure-sizing gold bar surface by grinding process being carried out into laser code.
The beneficial effects of the invention are as follows：
Preferably, step c in S1, the gold bar are placed in crucible and are heated to reddening at a temperature of 850 DEG C.
Preferably, step c in S1, the dilute sulfuric acid are 12% sulfuric acid.
Preferably, a steps in S2, the relative side of thick die mould piece described in two panels are arranged as required to rough line respectively
Road profile.
Preferably, b step in S3, the relative side of pressure-sizing matrix is arranged as required to fine line respectively described in two panels
Road profile.
Preferably, step c in S2, the output end gait of march of the hydraulic press is 6mm/s.
Preferably, step c in S3, the output end gait of march of the hydraulic press is 3mm/s.
Preferably, step c in S2, the first pressing gold bar are taken by clamp or golden shovel between two pieces of thick die mould pieces
Go out.
Preferably, b step in S3, pressure-sizing matrix described in two panels is using alkalescent cleaning liquid medicine cleaning, and wipe
Totally.
Preferably, a steps in S4, the gold material side of the pressure-sizing gold bar are completed by trimming, filing, frosted and polishing successively
Polishing
Embodiment 3
A kind of oil pressure gold bar manufacture craft, comprises the following steps：
S1, pretreatment of raw material：
A, the raw material gold basis of gold content more than 99.99% is taken to be sized cutting into some pieces of gold bullions；
B, take the gold bullion to be placed on tablet press machine tabletting repeatedly to its softening, then cut into gold bar；
C, take the gold bar to be heated to reddening at a temperature of 950 DEG C, it is attached then to immerse the dilute sulfuric acid rejecting gold bar surface
The impurity or spot；
S2, first pressing：
A, the first compression mould being made up of the thick die mould piece of two panels is taken, and is applied respectively in the thick relative side of die mould piece described in two panels
Brush hydraulic oil；
B, the gold bar in S1 after step c processing of learning from else's experience is placed between thick die mould piece described in two panels, then will it is described at the beginning of pressing mold
Tool is placed on the workbench of hydraulic press；
C, the output end of the hydraulic press grants the pressure of just 60 tons of the compression mould, is returned after at the uniform velocity arriving at setting stroke
Initial bit, and so on 2 times, the gold bar then taken out between two pieces of thick die mould pieces obtains first pressing gold bar；
S3, pressure-sizing：
A, the hydraulic oil on the first pressing gold bar surface, and wiped clean are cleaned using alkalescent cleaning liquid medicine；
B, the coining die being made up of two panels pressure-sizing matrix is taken, the first pressing gold bar after cleaning is placed in smart described in two panels
Between die mould piece, then the coining die is placed on the workbench of the hydraulic press；
C, the output end of the hydraulic press grants the pressure of 220 tons of the coining die, is returned after at the uniform velocity arriving at setting stroke
Initial bit is returned, and so on 3 times, the first pressing gold bar then taken out between two pieces of pressure-sizing matrix obtains pressure-sizing gold bar；
S4, tail processing：
A, by gold material side polishes smooth on the pressure-sizing gold bar, caused by two pieces of pressure-sizing matrix junctions；
B, can be dispatched from the factory after the pressure-sizing gold bar surface by grinding process being carried out into laser code.
The beneficial effects of the invention are as follows：
Preferably, step c in S1, the gold bar are placed in crucible and are heated to reddening at a temperature of 950 DEG C.
Preferably, step c in S1, the dilute sulfuric acid are 15% sulfuric acid.
Preferably, a steps in S2, the relative side of thick die mould piece described in two panels are arranged as required to rough line respectively
Road profile.
Preferably, b step in S3, the relative side of pressure-sizing matrix is arranged as required to fine line respectively described in two panels
Road profile.
Preferably, step c in S2, the output end gait of march of the hydraulic press is 6mm/s.
Preferably, step c in S3, the output end gait of march of the hydraulic press is 3mm/s.
Preferably, step c in S2, the first pressing gold bar are taken by clamp or golden shovel between two pieces of thick die mould pieces
Go out.
Preferably, b step in S3, pressure-sizing matrix described in two panels is using alkalescent cleaning liquid medicine cleaning, and wipe
Totally.
Preferably, a steps in S4, the gold material side of the pressure-sizing gold bar are completed by trimming, filing, frosted and polishing successively
Polishing.
Embodiment 4
A kind of oil pressure gold bar manufacture craft, comprises the following steps：
S1, pretreatment of raw material：
A, the raw material gold basis of gold content more than 99.99% is taken to be sized cutting into some pieces of gold bullions；
B, take the gold bullion to be placed on tablet press machine tabletting repeatedly to its softening, then cut into gold bar；
C, take the gold bar to be heated to reddening at a temperature of 900 DEG C, it is attached then to immerse the dilute sulfuric acid rejecting gold bar surface
The impurity or spot；
S2, first pressing：
A, the first compression mould being made up of the thick die mould piece of two panels is taken, and is applied respectively in the thick relative side of die mould piece described in two panels
Brush hydraulic oil；
B, the gold bar in S1 after step c processing of learning from else's experience is placed between thick die mould piece described in two panels, then will it is described at the beginning of pressing mold
Tool is placed on the workbench of hydraulic press；
C, the output end of the hydraulic press grants the pressure of just 55 tons of the compression mould, is returned after at the uniform velocity arriving at setting stroke
Initial bit, and so on 3 times, the gold bar then taken out between two pieces of thick die mould pieces obtains first pressing gold bar；
S3, pressure-sizing：
A, the hydraulic oil on the first pressing gold bar surface, and wiped clean are cleaned using alkalescent cleaning liquid medicine；
B, the coining die being made up of two panels pressure-sizing matrix is taken, the first pressing gold bar after cleaning is placed in smart described in two panels
Between die mould piece, then the coining die is placed on the workbench of the hydraulic press；
C, the output end of the hydraulic press grants the pressure of 215 tons of the coining die, is returned after at the uniform velocity arriving at setting stroke
Initial bit is returned, and so on 4 times, the first pressing gold bar then taken out between two pieces of pressure-sizing matrix obtains pressure-sizing gold bar；
S4, tail processing：
A, by gold material side polishes smooth on the pressure-sizing gold bar, caused by two pieces of pressure-sizing matrix junctions；
B, can be dispatched from the factory after the pressure-sizing gold bar surface by grinding process being carried out into laser code.
The beneficial effects of the invention are as follows：
Preferably, step c in S1, the gold bar are placed in crucible and are heated to reddening at a temperature of 900 DEG C.
Preferably, step c in S1, the dilute sulfuric acid are 15% sulfuric acid.
Preferably, a steps in S2, the relative side of thick die mould piece described in two panels are arranged as required to rough line respectively
Road profile.
Preferably, b step in S3, the relative side of pressure-sizing matrix is arranged as required to fine line respectively described in two panels
Road profile.
Preferably, step c in S2, the output end gait of march of the hydraulic press is 5mm/s.
Preferably, step c in S3, the output end gait of march of the hydraulic press is 2mm/s.
Preferably, step c in S2, the first pressing gold bar are taken by clamp or golden shovel between two pieces of thick die mould pieces
Go out.
Preferably, b step in S3, pressure-sizing matrix described in two panels is using alkalescent cleaning liquid medicine cleaning, and wipe
Totally.
Preferably, a steps in S4, the gold material side of the pressure-sizing gold bar are completed by trimming, filing, frosted and polishing successively
Polishing.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme, it all should cover among the claim of the present invention and the scope of specification.
Claims (10)
1. a kind of oil pressure gold bar manufacture craft, it is characterised in that comprise the following steps：
S1, pretreatment of raw material：
A, the raw material gold basis of gold content more than 99.99% is taken to be sized cutting into some pieces of gold bullions；
B, take the gold bullion to be placed on tablet press machine tabletting repeatedly to its softening, then cut into gold bar；
C, take the gold bar to be heated to reddening at a temperature of 800 DEG C~950 DEG C, then immerse dilute sulfuric acid and reject the gold bar surface
The impurity or spot of attachment；
S2, first pressing：
A, the first compression mould being made up of the thick die mould piece of two panels is taken, and distinguishes brushing liquid in the relative side of thick die mould piece described in two panels
Force feed；
B, the gold bar in S1 after step c processing of learning from else's experience is placed between thick die mould piece described in two panels, then will it is described at the beginning of compression mould put
In on the workbench of hydraulic press；
C, the output end of the hydraulic press grants the pressure of just 50 tons~60 tons of the compression mould, is returned after at the uniform velocity arriving at setting stroke
Initial bit is returned, and so on 2~3 times, the gold bar then taken out between two pieces of thick die mould pieces obtains first pressing gold bar；
S3, pressure-sizing：
A, the hydraulic oil on the first pressing gold bar surface, and wiped clean are cleaned using alkalescent cleaning liquid medicine；
B, the coining die being made up of two panels pressure-sizing matrix is taken, the first pressing gold bar after cleaning is placed in pressure-sizing type described in two panels
Between piece, then the coining die is placed on the workbench of the hydraulic press；
C, the output end of the hydraulic press grants the pressure of 200 tons~220 tons of the coining die, after at the uniform velocity arriving at setting stroke
Initial bit is returned to, and so on 3~5 times, the first pressing gold bar then taken out between two pieces of pressure-sizing matrix obtains pressure-sizing
Gold bar；
S4, tail processing：
A, by gold material side polishes smooth on the pressure-sizing gold bar, caused by two pieces of pressure-sizing matrix junctions；
B, can be dispatched from the factory after the pressure-sizing gold bar surface by grinding process being carried out into laser code.
2. a kind of oil pressure gold bar manufacture craft according to claim 1, it is characterised in that step c in S1, the gold bar are put
In being heated to reddening at a temperature of 800 DEG C~950 DEG C in crucible.
A kind of 3. oil pressure gold bar manufacture craft according to claim 1 or 2, it is characterised in that step c in S1, it is described dilute
Sulfuric acid is 10%~15% sulfuric acid.
A kind of 4. oil pressure gold bar manufacture craft according to claim 1, it is characterised in that a steps in S2, it is thick described in two panels
The relative side of die mould piece is arranged as required to rough lines profile respectively.
5. a kind of oil pressure gold bar manufacture craft according to claim 1, it is characterised in that b step in S3, essence described in two panels
The relative side of die mould piece is arranged as required to fine lines profile respectively.
6. a kind of oil pressure gold bar manufacture craft according to claim 1 or 4, it is characterised in that step c in S2, the oil
The output end gait of march of press is 5mm/s~6mm/s.
7. a kind of oil pressure gold bar manufacture craft according to claim 1 or 5, it is characterised in that step c in S3, the oil
The output end gait of march of press is 2mm/s~3mm/s.
A kind of 8. oil pressure gold bar manufacture craft according to claim 1 or 4, it is characterised in that step c in S2, it is described first
Pressure gold bar is taken out by clamp or golden shovel between two pieces of thick die mould pieces.
9. a kind of oil pressure gold bar manufacture craft according to claim 1 or 5, it is characterised in that b step in S3, two panels institute
Pressure-sizing matrix is stated to clean using alkalescent cleaning liquid medicine, and wiped clean.
10. a kind of oil pressure gold bar manufacture craft according to claim 1 or 5, it is characterised in that a steps in S4, the essence
The gold material side of gold bar is pressed to complete polishing by trimming, filing, frosted and polishing successively.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115156851A (en) * | 2022-07-15 | 2022-10-11 | 北京数字造办科技有限公司 | Oil pressure process for manufacturing noble metal ornaments by standard gram weight |
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