CN108188674A - A kind of high speed nut molding machine nut stroke mould processing method - Google Patents
A kind of high speed nut molding machine nut stroke mould processing method Download PDFInfo
- Publication number
- CN108188674A CN108188674A CN201711461664.8A CN201711461664A CN108188674A CN 108188674 A CN108188674 A CN 108188674A CN 201711461664 A CN201711461664 A CN 201711461664A CN 108188674 A CN108188674 A CN 108188674A
- Authority
- CN
- China
- Prior art keywords
- mold core
- formwork
- processing method
- endoporus
- nut
- 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.)
- Pending
Links
Classifications
-
- 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
- B23P15/24—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass dies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
The invention discloses a kind of high speed nut molding machine nut stroke mould processing method, nut stroke mould includes the stroke formwork with formwork endoporus and the upper mold core, the lower mold core that are fixedly installed in formwork endoporus, including：Formwork makes, mold core makes, formwork and mold core are the same as four mill group die face taper, electric spark high current machining center seat, group mould, electric spark moldings.Compared with prior art, processing method of the present invention can improve mold service life, promote cold upsetting production operating efficiency, reduce the cost in period die life.
Description
Technical field
The present invention relates to mould manufacturing field, especially a kind of high speed nut molding machine nut stroke mould processing method.
Background technology
At present, the hex nut within M10 ~ M24 generally using high-speed cold heading machine produce, high-speed cold heading machine have at a high speed, it is high-precision
The productive prospectings such as degree, high stable, cold-heading speed between 100 ~ 300/minute, be higher by than the speed of traditional cold headers 2 times ~
5 times.During high speed cold-pressed nut, mold bears the effect of high temperature, high speed, heavy shock loads, and traditional molding die makes
Use the service life<520h, average life span 260h or so.Since mold service life is short, cause cold upsetting production operating efficiency low, the mold longevity
Cost in the life period remains high.
Invention content
The present invention provides a kind of high speed nut molding machine nut stroke mould processing method that can improve service life.
To achieve the above object, the present invention provides a kind of high speed nut molding machine nut stroke mould processing method, nut
Stroke mould includes the stroke formwork with formwork endoporus and the upper mold core, the lower mold core that are fixedly installed in formwork endoporus, including：
Formwork makes, mold core makes, formwork and mold core are the same as mill group die face taper, electric spark high current machining center seat, group mould, electric spark
Four moldings.
In a wherein embodiment, formwork making includes vehicle hole, milling side, heat treatment, cylindrical grinding, grinding out.
In a wherein embodiment, mold core making includes the cylindrical grinding of upper mold core and lower mold core, mill endoporus step.
In a wherein embodiment, formwork is that formwork passes through computer controlled grinding with upper and lower mold core with mill group die face taper with mold core
Machine is ground processing using same set of grinding clamp and angle.
In a wherein embodiment, grinding clamp includes fixed seat and the three-jaw card being rotatably mounted in fixed seat
Disk, scroll chuck center line can be relatively fixed a transverse rotation predetermined angle, to grind the cone of predetermined angle in formwork endoporus
Degree, mold core outer circle grind the taper of predetermined angle.
In a wherein embodiment, electric spark high current machining center seat is that upper mold core is packed into the endoporus of formwork, right
The carry out roughing of the endoporus of upper mold core.
In a wherein embodiment, group mould is that upper and lower mold core and interior regular hexagon bolt are fitted into formwork endoporus, and
Upper mold core carries out the compression molding operation that intrusion is 2.5 ~ 3mm.
In a wherein embodiment, edm forming is that four electrical discharge machinings are carried out to upper and lower mold core, every time using not
Electrode together, electric current, equipment.
In a wherein embodiment, lower mold core is using the hard alloy for meeting following physical performance index：Hardness 84 ~
85HRA, 3100 ~ 3200N/mm2 of bending strength, cobalt magnetic 16 ~ 17%, 2 ~ 2.5 μm of granularity, A02+B00 grades of porosity, free charcoal element
C00 grades, α phases 1 ~ 2, β phases 0.5 ~ 2.0, it is impossible to have η phases.
In a wherein embodiment, upper mold core is using the hard alloy for meeting following physical performance index：Hardness 84 ~
85HRA, 3100 ~ 3200N/mm2 of bending strength, cobalt magnetic 16 ~ 17%, 2 ~ 2.5 μm of granularity, A02+B00 grades of porosity, free charcoal element
C00 grades, α phases 1 ~ 2, β phases 0.5 ~ 2.0, it is impossible to have η phases；Or using the hard alloy for meeting following physical performance index：Hardness
82 ~ 85HRA, 2200 ~ 2500N/mm2 of bending strength, cobalt magnetic 20%, 1.2 μm of granularity.
The beneficial effects of the invention are as follows：Processing method of the present invention can improve mold service life, promote cold upsetting production operation
Efficiency reduces the cost in period die life.
Description of the drawings
Fig. 1 is the exploded sectional view of high speed nut molding machine nut stroke mould of the embodiment of the present invention.
Fig. 2 is the bottom view of stroke formwork in the nut stroke mould of high speed nut molding machine shown in Fig. 1.
Fig. 3 is the bottom view of interior regular hexagon bolt in the nut stroke mould of high speed nut molding machine shown in Fig. 1.
Fig. 4 is the assembling view of the nut stroke mould of high speed nut molding machine shown in Fig. 1.
Fig. 5 is for formwork in high speed nut molding machine nut stroke mould processing method of the embodiment of the present invention with mold core with mill group
The schematic diagram of die face taper step.
Fig. 6 is that electric spark high current is processed in high speed nut molding machine nut stroke mould processing method of the embodiment of the present invention
The schematic diagram of centre mount step.
Fig. 7 is four molding steps of electric spark in high speed nut molding machine nut stroke mould processing method of the embodiment of the present invention
Rapid schematic diagram.
Fig. 8 is first time molding electrode shape schematic diagram in four moldings of electric spark shown in Fig. 7.
Fig. 9 is second of molding electrode shape schematic diagram in four moldings of electric spark shown in Fig. 7.
Figure 10 is the molding electrode shape schematic diagram of third time in four moldings of electric spark shown in Fig. 7.
Figure 11 is the 4th molding electrode shape schematic diagram in four moldings of electric spark shown in Fig. 7.
Specific embodiment
Below in conjunction with the accompanying drawings and example, the present invention will be further described.
In the present embodiment, high speed nut molding machine is primarily adapted for use in the high speed nut of 5 stations, 6 stations with nut stroke mould
Molding machine, nut specification limit are to meet GB/T6170, GB/T6171, GB/T6172.1, GB/T6173, GB/T6174, GB/
The nut of the cold heading technique production of M10 ~ M24 of the national regulations such as T56, due to the mold materials of this series and manufacturing process principle
Unanimously, parameter similar, the present embodiment are mainly illustrated by taking the mold of M12 as an example.
In the present embodiment, as shown in Fig. 1 to 5, high speed nut molding machine includes stroke formwork 1, upper mold with nut stroke mould
Core 2, lower mold core 3, retaining element（Retaining element is interior regular hexagon bolt 4 in the present embodiment）.1 interposition of stroke formwork installs
There is formwork endoporus 11, formwork endoporus top is bellmouth, to accommodate upper mold core 2 and lower mold core 3.Formwork endoporus lower part is screw thread
Hole with interior regular hexagon bolt 4 to coordinate, coordinates to fix upper mold core 2 under by interior regular hexagon bolt 4 and threaded hole
Mold core 3.
Upper mold core 2 uses hard alloy material with lower mold core 3, is satisfied by physical performance index：84 ~ 85HRA of hardness, bending resistance
3100 ~ 3200N/mm of intensity2, cobalt magnetic 16 ~ 17%, 2 ~ 2.5 μm of granularity, A02+B00 grades of porosity, C00 grades of free charcoal element, α phases 1 ~
2, β phases 0.5 ~ 2.0, it is impossible to have η phases.Can also lower mold core 3 use above-mentioned material, and upper mold core 2 using traditional YG20C,
YG20 or performance make similar to the hard alloy of the trade mark, 82 ~ 85HRA of hardness of this series hard alloy, and bending strength 2200 ~
2500N/mm2, cobalt magnetic 20%, 1.2 μm or so of granularity.
The failure that traditional high speed cold-heading nut mold has 90% ratio is appeared in lower mold core, and the form of expression of failure has circle
Arc bottom selenodont pit, inner bore perimeter collapse block, the separation of upper mold core lower mold core and seamed edge abrasion, lower mold core bottom surface pockmark
Deng.Curved bottom crescent moon pit, the separation of upper mold core lower mold core and seamed edge abrasion, lower mold core bottom table are judged according to failure analysis
It may be cemented carbide material mechanical property problem that face pockmark, which is, it is also possible to be process issues.Interior sky periphery collapses block only
It can be cemented carbide material mechanical property problem.
According to failure analysis and the Experimental Comparison of tens of times, YG20, YG20C or property of traditional molding die selection are determined
Can the hard alloy of the similar trade mark there are bending strength is low, granularity is partially thin, voidage rank is higher, carbide rank is unstable etc.
Defect.The above-mentioned physical performance index of final determining hard alloy（Material composition and technique are grasped by hard alloy producer, are met
Mechanical property）, processing technology and performance through testing hard alloy reach expected requirement.
In the present embodiment, the processing method of high speed nut molding machine nut stroke mould includes the following steps：Formwork makes
→ mold core making → formwork is with mold core with mill group die face taper → electric spark high current machining center seat → group mould（Intrusion 2.5 ~
3mm）Four molding → polishing → labels of → electric spark → inspection storage.
Key step is briefly described below.Formwork making includes vehicle hole, milling side, heat treatment, cylindrical grinding, grinding out etc.
Step.Mold core making includes cylindrical grinding, grinds endoporus.As shown in figure 5, formwork is formwork with mill group die face taper with mold core
With upper and lower mold core by computer controlled grinding machine 5, processing is ground using same set of grinding clamp and angle.Grinding clamp includes solid
Reservation（It is not drawn into）And it is rotatably mounted to the scroll chuck 6 in fixed seat（May be other clamping devices）, three-jaw card
6 center line of disk can be relatively fixed 5 degree of a transverse rotation（As indicated by the arrows in the figure）, it is rotated with reference to scroll chuck 6 itself, it can be in mould
Shell endoporus grinds 5 degree（A meanings angle in figure）Taper, upper and lower mold core peripheral milling goes out 5 degree of taper.As shown in fig. 6, electric spark
High current machining center seat is to be packed into upper mold core in the endoporus of formwork, the carry out roughing to the endoporus of upper mold core.Organizing mould is
Upper and lower mold core and interior regular hexagon bolt are fitted into formwork endoporus, and it is 2.5 ~ 3mm that upper mold core, which carries out intrusion,（H in figure
Signified size）Compression molding operation.As shown in fig. 7, four moldings of electric spark are to carry out four electrical discharge machinings to upper and lower mold core, often
Secondary electrode, electric current, equipment are all had any different.Electrode shape is respectively regular hexagonal section+end cylinder, regular hexagonal section
+ end chamfering, regular hexagonal section+end chamfering, cylinder（Respectively as shown in Fig. 8,9,10,11）, size is respectively
17.35mm（Regular hexagon opposite side size）、17.3mm、17.35mm、13.8mm.The electric current of four processing is passed step by step from 14A ~ 6A
Subtract.Preceding electrical discharge machining three times is equivalent to roughing and semifinishing, and the 4th time electrical discharge machining is equivalent to finishing.
The processing route of traditional molding die is：Formwork making → mold core cylindrical grinding, mill endoporus → group mould（Intrusion 2 ~
4mm）→ electric spark one-pass molding → polishing → label → inspection storage, according to failure analysis and Experimental Comparison, upper mold core, lower die
Core detaches and the failure modes such as seamed edge abrasion, lower mold core bottom surface pockmark, curved bottom crescent moon pit and processing technology have
Much relations, upper mold core, lower mold core separation and seamed edge abrasion belong to pressing mold and cause defect, lower mold core bottom surface pockmark, circular arc
Bottom crescent moon pit is likely to be the defects of edm forming causes.
In the present embodiment, formwork and mold core with mill group die face taper be same equipment, using same fixture and angle into
Capable processing, the advantageous angle that ensure that group die face and precision consistency, group die face are contacted for complete face, the friction of generation
Power increases considerably, and in addition formwork increases the compression of mold core, and the fatigue life value of mold increases substantially.The present invention's adds
In work technique, while the pressing mold amount of group mould is controlled more accurate, by the control of the optimum value of pressing mold amount in 2.5 ~ 3mm, favorably
Reduce die life scattered error.
In the present embodiment, the molding of electric spark four times be increased on the basis of traditional electric spark one-pass molding three times into
Type, different number edm formings choosings use at the time of molding electrode, electric current, equipment are all had any different, preceding electrical discharge machining three times
Roughing and semifinishing are equivalent to, the 4th time electrical discharge machining is equivalent to finishing.The shape of processing electrode used therein, ruler every time
It is very little different（It is specifically shown in attached drawing）, four times the electric current processed successively decreases step by step from 14A ~ 6A.Four moulding process production of electric spark
The mold bore area gone out eliminates the defects of carbon distribution generated in traditional electrical discharge machining, spot corrosion, carbide scaling loss.
It is proved through test of many times, the high speed cold-heading screw nut die for carrying out selection by the present embodiment and fabricating uses the longevity
Life>1000h, average life span>900h.
Claims (10)
1. a kind of high speed nut molding machine nut stroke mould processing method, nut stroke mould includes the stroke with formwork endoporus
Formwork and the upper mold core being fixedly installed in formwork endoporus, lower mold core, which is characterized in that including：Formwork makes, mold core system
Make, formwork and mold core are the same as four mill group die face taper, electric spark high current machining center seat, group mould, electric spark moldings.
2. processing method according to claim 1, which is characterized in that formwork making includes vehicle hole, milling side, heat treatment, mill
Outer circle, grinding out.
3. processing method according to claim 1, which is characterized in that mold core making is included outside the mill of upper mold core and lower mold core
Circle, mill endoporus step.
4. processing method according to claim 1, which is characterized in that formwork and mold core with mill group die face taper be formwork with
Upper and lower mold core is ground processing by computer controlled grinding machine using same set of grinding clamp and angle.
5. processing method according to claim 4, which is characterized in that grinding clamp includes fixed seat and rotatable installation
In the scroll chuck in fixed seat, scroll chuck center line can be relatively fixed a transverse rotation predetermined angle, in formwork
Hole grinds the taper of predetermined angle, and mold core outer circle grinds the taper of predetermined angle.
6. processing method according to claim 1, which is characterized in that electric spark high current machining center seat is in formwork
Upper mold core is packed into endoporus, the carry out roughing to the endoporus of upper mold core.
7. processing method according to claim 1, which is characterized in that group mould is by upper and lower mold core and interior regular hexagon spiral shell
Bolt is fitted into formwork endoporus, and upper mold core carries out the compression molding operation that intrusion is 2.5 ~ 3mm.
8. processing method according to claim 1, which is characterized in that edm forming is to carry out four electricity to upper and lower mold core
Spark is processed, every time using different electrodes, electric current, equipment.
9. processing method according to claim 1, which is characterized in that lower mold core, which uses, meets following physical performance index
Hard alloy：84 ~ 85HRA of hardness, 3100 ~ 3200N/mm of bending strength2, cobalt magnetic 16 ~ 17%, 2 ~ 2.5 μm of granularity, porosity A02
+ B00 grades, C00 grades of free charcoal element, α phases 1 ~ 2, β phases 0.5 ~ 2.0, it is impossible to have η phases.
10. processing method according to claim 1, which is characterized in that upper mold core, which uses, meets following physical performance index
Hard alloy：84 ~ 85HRA of hardness, 3100 ~ 3200N/mm of bending strength2, cobalt magnetic 16 ~ 17%, 2 ~ 2.5 μm of granularity, porosity
A02+B00 grades, C00 grades of free charcoal element, α phases 1 ~ 2, β phases 0.5 ~ 2.0, it is impossible to have η phases；Or it uses and meets following physical property
The hard alloy of index：82 ~ 85HRA of hardness, 2200 ~ 2500N/mm of bending strength2, cobalt magnetic 20%, 1.2 μm of granularity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711461664.8A CN108188674A (en) | 2017-12-29 | 2017-12-29 | A kind of high speed nut molding machine nut stroke mould processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711461664.8A CN108188674A (en) | 2017-12-29 | 2017-12-29 | A kind of high speed nut molding machine nut stroke mould processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108188674A true CN108188674A (en) | 2018-06-22 |
Family
ID=62585731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711461664.8A Pending CN108188674A (en) | 2017-12-29 | 2017-12-29 | A kind of high speed nut molding machine nut stroke mould processing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108188674A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111230606A (en) * | 2020-02-17 | 2020-06-05 | 上海康德莱医疗器械自动化研究所有限公司 | Machining method of mold core for 6% luer conical joint |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101585132A (en) * | 2008-05-23 | 2009-11-25 | 苏州鼎金精密五金有限公司 | Processing method of unit die of nut forming machine |
| WO2010054678A1 (en) * | 2008-11-15 | 2010-05-20 | Diehl Metall Stiftung & Co. Kg | Forming tool |
| CN201760549U (en) * | 2010-07-14 | 2011-03-16 | 厦门恒耀金属有限公司 | Cold forging module structure of welded nut |
| CN102303221A (en) * | 2011-08-29 | 2012-01-04 | 西南铝业（集团）有限责任公司 | Method for processing female die with large square hole |
| CN103464996A (en) * | 2013-09-25 | 2013-12-25 | 张家港保税区冠祥贸易有限公司 | Die production process |
| CN106955960A (en) * | 2017-05-19 | 2017-07-18 | 三门通顺铆钉有限公司 | Cold upsetting die of car and its processing technology |
| CN107457544A (en) * | 2017-06-29 | 2017-12-12 | 昆山益耐特精密模具有限公司 | A kind of processing technology encapsulated with mould molding chamber |
-
2017
- 2017-12-29 CN CN201711461664.8A patent/CN108188674A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101585132A (en) * | 2008-05-23 | 2009-11-25 | 苏州鼎金精密五金有限公司 | Processing method of unit die of nut forming machine |
| WO2010054678A1 (en) * | 2008-11-15 | 2010-05-20 | Diehl Metall Stiftung & Co. Kg | Forming tool |
| CN201760549U (en) * | 2010-07-14 | 2011-03-16 | 厦门恒耀金属有限公司 | Cold forging module structure of welded nut |
| CN102303221A (en) * | 2011-08-29 | 2012-01-04 | 西南铝业（集团）有限责任公司 | Method for processing female die with large square hole |
| CN103464996A (en) * | 2013-09-25 | 2013-12-25 | 张家港保税区冠祥贸易有限公司 | Die production process |
| CN106955960A (en) * | 2017-05-19 | 2017-07-18 | 三门通顺铆钉有限公司 | Cold upsetting die of car and its processing technology |
| CN107457544A (en) * | 2017-06-29 | 2017-12-12 | 昆山益耐特精密模具有限公司 | A kind of processing technology encapsulated with mould molding chamber |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111230606A (en) * | 2020-02-17 | 2020-06-05 | 上海康德莱医疗器械自动化研究所有限公司 | Machining method of mold core for 6% luer conical joint |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102059417A (en) | Electrode and machine tool dedicated for combined machining of electric spark shaping of inner round bore and elastic honing | |
| CN207255983U (en) | A kind of emery wheel rod | |
| CN105458641A (en) | Manufacturing method for integral PCD cutters applied to small-diameter hole manufacturing | |
| CN102069243B (en) | Cathode for electrolysis mechanical combined machine tool | |
| CN110509016B (en) | Manufacturing process of ultra-fine hard alloy milling cutter | |
| CN104057271B (en) | A kind of preparation method of carbide alloy tool and mould | |
| CN108188674A (en) | A kind of high speed nut molding machine nut stroke mould processing method | |
| CN109531078B (en) | Processing method of phenolic aldehyde rubberized fabric separated entity retainer | |
| CN104475887B (en) | The EDM Grinding method of Low rigidity taper seat rod member | |
| CN105014308A (en) | Manufacturing method of miniature steel balls | |
| CN205520984U (en) | Assembled emery wheel that diameter is adjustable | |
| CN108296404A (en) | A kind of high speed nut molding machine nut stroke mould and its lower mold core | |
| CN108081114A (en) | A kind of formwork is with mold core with mill group die face taper method and system | |
| CN102717342A (en) | Milling and grinding tool capable of realizing high-efficient machining of inorganic composite material | |
| CN205085407U (en) | Accurate hard alloy cutting tool of high performance | |
| CN201483105U (en) | Electrode for processing hard alloy die with irregular surface by electric spark | |
| CN113732969B (en) | Diamond grinding wheel and manufacturing method thereof | |
| CN112719785B (en) | Method and system for processing aluminum-based composite material special-shaped nut part | |
| CN201940908U (en) | Abrasive wheel for processing bulb | |
| CN110561059B (en) | Manufacturing process of ultrathin pinion blade | |
| CN112677045B (en) | Diamond roller, preparation device and preparation method | |
| CN107225515A (en) | The multi-thread emery wheel of combined type of thread forming tap screw grinder | |
| CN204639645U (en) | Float type frock | |
| CN207058376U (en) | The multi-thread emery wheel of combined type of thread forming tap screw grinder | |
| CN101695780B (en) | Production process of screw mold tungsten steel washer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180622 |
|
| WD01 | Invention patent application deemed withdrawn after publication |