CN106475502A - A kind of jag draws the manufacture method of cap blank - Google Patents
A kind of jag draws the manufacture method of cap blank Download PDFInfo
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- CN106475502A CN106475502A CN201610861405.3A CN201610861405A CN106475502A CN 106475502 A CN106475502 A CN 106475502A CN 201610861405 A CN201610861405 A CN 201610861405A CN 106475502 A CN106475502 A CN 106475502A
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- jag
- moulds
- cap blank
- manufactured goods
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- 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
- B21J5/008—Incremental forging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention discloses a kind of jag draws the manufacture method of cap blank, it is in cylinder that jag draws the main body of cap blank, the cylinder has the bigger centre bore of median pore radius, there is the jag muscle bloated in the middle of several on the surface of cylinder, the bottom of the cylinder does not have jag muscle, and the aperture of bottom is little compared with the aperture above which, and jag draws the upper end of cap blank to have T connector, T connector is rounded, has step below T connector.The present invention carries out the shaping completely that jag draws cap blank in cold header, without secondary operation again.Present invention reduces the loss of stub bar, material tail, reduces the large-area lathe surplus such as endoporus so that raw material loss reduces by 50%, so as to reduce cost；Using the continuously shaped production of multi-station cold-heading, speed of production can reach 60PCS/ minute, and average daily production 21000PCS, production efficiency are improved efficiency, and greatly reduce the cost of investment of human and material resources than 78 times of original lifting.
Description
Technical field
The present invention relates to a kind of multi-station cold-heading technical field, and in particular to a kind of jag draws the multistation of cap blank cold
Upsetting one-shot forming method field of manufacturing.
Background technology
Jag draws cap to be primarily useful for plastic parts, the steel and iron parts of relatively thin scope or need the relatively low position for installing strength.Mesh
Before be widely used in the electromechanical and light industrial goods such as automobile, aviation, railway, refrigeration, elevator, switch, instrument, furniture, decoration
Fit on, with the firm efficiency high of riveting, feature easy to use.
At present domestic to using straight bar production more than this product manufacturing, endoporus must the processing mode repaiied of car, four in profile
Bar muscle needs milling machine to process.Produced using straight bar or hot upsetting, multistation quantity-produced requirement is not reached, endoporus needs large area
Finishing processing, four in profile muscle needs milling machine to process, and needs punch press expansion jag, its production not only waste of materials,
And operation is various, processed complex, production cost are high, and efficiency is low, and quality also cannot ensure accordingly, its process equipment and
Every combination property of product cannot meet the requirement of domestic and international market.
Content of the invention
The technical problem to be solved in the present invention is to provide the manufacture method that a kind of jag draws cap blank, cold using multistation
Upsetting one-shaping technique, saves raw material, reduces production cost, improves product quality and production efficiency.
For solving the above problems, the technical scheme is that：
A kind of jag draws the manufacture method of cap blank, is first annealed using steel billet materials, then carries out phosphate surface process, essence
Sizing processing is taken out, in cold header, the molding procedure that jag draws cap blank is finally carried out, specifically includes following steps：
（1）, essence is taken out the circle of the disk after sizing material automatic shearing in cold header sent into by feed wheel be cut into single jag and draw cap
Blank raw material part；
（2）, jag drawing cap blank raw material part moved on to a mould mouth of cold header, will by the tool that rushes of a die nose
Jag draws cap blank raw material part to head in a female die of die, through the cold-heading manufacture in a mould, makes making for a mould
Product front end is molded T connector, and extrudes the first location hole on T connector, while reducing entire length, makes the manufactured goods of a mould whole
Body length is shorter than jag drawing cap blank, and the T connector of the manufactured goods of a mould is rounded, and its diameter draws cap blank than jag
T connector diameter is little, and thickness draws the T connector thickness of cap blank big than jag；
（3）, the manufactured goods of a mould are moved on to No. two mould mouths, rush tool by the manufactured goods top of a mould by No. two die nose
Enter in No. two female die of die, through the cold-heading manufacture in No. two moulds, go out the manufactured goods outer surface upsetting of No. two moulds and draw with jag
The consistent outwardly axial ribs of the jag muscle quantity of cap blank, the axial ribs width of the manufactured goods of No. two moulds and jag draw
The width of the jag muscle on cap blank surface is consistent, and the radius of the axial ribs and jag draw cap blank not have the bottom of muscle
Radius consistent, the axial ribs extend to the bottom of the manufactured goods of No. two moulds but do not extend to its bottom from the lower section of T connector,
Also, the manufactured goods front end face upsetting in No. two moulds goes out the first counterbore, the aperture of the first counterbore and jag draw cap blank centre bore
Consistent with the minimum-value aperture of the corresponding hole section of jag muscle, also, thicken the thickness of the T connector of a molded product and elongate entirety
Length, but the manufactured goods entire length of No. two moulds draws cap blank short than jag；
（4）, the manufactured goods of No. two moulds are moved on to No. three mould mouths, rush tool by the manufactured goods top of No. two moulds by No. three die nose
Enter in No. three female die of die, through the cold-heading manufacture in No. three moulds, the manufactured goods of No. three moulds are made on the basis of the first counterbore,
Continue downwards upsetting and go out the second counterbore, the diameter of the second counterbore is less than the diameter of the first counterbore, and goes out the second location hole in rear end upsetting,
And make the manufactured goods of No. three moulds do not have the bottom of axial ribs external diameter consistent with the external diameter of the axial ribs, make setting axial ribs
The surface at place switchs to groove type, also, elongates entire length, makes the manufactured goods entire length of No. three moulds and jag draw cap blank
Length consistent, the manufactured goods of No. three moulds do not have the length of the bottom of axial ribs and jag draws cap blank not have jag muscle
Lower length consistent；
（5）, the manufactured goods of No. three moulds are moved on to No. four mould mouths, rush tool by the manufactured goods top of No. three moulds by No. four die nose
Enter in No. four female die of die, through the cold-heading manufacture in No. four moulds, determine the second counterbore of the manufactured goods of No. three moulds and second
By logical iron filings between the hole of position, the second counterbore after insertion and second positions hole length and jag drawing cap blank with jag muscle
Bottom length consistent with internal diameter, formed jag draw cap blank not have jag muscle bottom, make the system of No. four moulds
Finished product；
（6）, the manufactured goods of No. four moulds are moved on to No. five mould mouths, rush tool by the manufactured goods top of No. four moulds by No. five die nose
Enter in No. five female die of die, through the cold-heading manufacture in No. five moulds, be counter-bored the top of the first counterbore section, No. five moulds
Manufactured goods form two knotholes in the first counterbore section, and and hole below constitute the centre bore of the manufactured goods of No. five moulds, two sections
The position of the connecting part in hole and jag draw the position at the maximum gauge that cap blank jag muscle is bloated corresponding, and by No. two moulds
The T connector of formation is depressed into, formation jag drawing cap blank consistent with the consistency of thickness of the T connector of jag drawing cap blank, diameter
T connector, and formed jag draw cap blank T connector below step；
（7）, the manufactured goods of No. five moulds are moved on to No. six mould mouths, rush tool by the manufactured goods top of No. five moulds by No. six die nose
Enter in No. six female die of die, through the cold-heading manufacture in No. five moulds, the centre bore of the manufactured goods of No. five moulds is strutted, completes jag
The work of cap blank jag is drawn, is formed jag and draws the bigger center of jag muscle that the centre of cap blank bloats and median pore radius
Hole, makes final jag and draws cap blank；The jag for being formed draws the main body of cap blank in cylinder, and the cylinder has centre
The bigger centre bore in aperture, the bottom that there is the jag muscle bloated in the middle of several, the cylinder on the surface of cylinder do not have jag muscle,
The aperture of bottom is little compared with the aperture above which, and jag draws the upper end of cap blank to have T connector, and T connector is rounded, below T connector
There is step.
Beneficial effects of the present invention：
（1）, straight bar and fracture replaced using disk circle material, multi-station cold-heading quantity-produced requirement can be completed, reduce stub bar,
The loss of material tail, while using after multi-station cold-heading one-shot forming, reduce the large-area lathe surplus such as endoporus so that former material
Material loss reduces by 50%, so as to reduce cost；
（2）, adopt the continuously shaped production of multi-station cold-heading, speed of production can reach 60PCS/ minute, average daily production
21000PCS, production efficiency is than 7-8 times of original lifting, improve production efficiency.
（3）, produced using multistation cold-forge forming, reduce operation, the jag of this technique productions draws cap blanking inner hole complete
Shaping, without secondary operation again, expands jag, reduces cost, Yuan Xu 5-6 road work without secondary drilling again, milling machine groove milling, punch press
Sequence, existing one-shot forming are completed, and greatly reduce the cost of investment of human and material resources, it is ensured that endoporus quality, and riveting firmly, is riveted
Pulling force is high.
Description of the drawings
Fig. 1 is the multi-station cold-heading one-shot forming production technology flow chart of the present invention.
Fig. 2 is the upward view of Fig. 1.
Specific embodiment
Referring to accompanying drawing, jag provided by the present invention is drawn the manufacture method of cap blank, is first annealed using steel billet materials, so
After carry out phosphate surface process, essence takes out sizing processing, finally carry out in cold header jag draw cap blank shaping
Operation, specifically includes following steps：
（1）, essence is taken out the circle of the disk after sizing material automatic shearing in cold header sent into by feed wheel be cut into single jag and draw cap
Blank raw material part 100；
（2）, jag drawing cap blank raw material part mechanical clamp is automatically shifted to a mould mouth of cold header, by a mould
Jag is drawn cap blank raw material part 100 to head in a female die of die by the tool that rushes of tool front end, as there are push rod, die in die rear end
Internal diameter front end have a step, punching tool front end has the step of projection again, applies under stressed extruding tool is rushed, makes a mould
1 front end of manufactured goods is molded T connector 11, and extrudes the first location hole 12 on T connector 11, while reducing entire length, makes No. one
1 entire length of manufactured goods of mould is shorter than jag drawing cap blank 6, and the T connector 11 of the manufactured goods 1 of a mould is rounded, its diameter
Draw 52 diameter of T connector of cap blank 6 little than jag, thickness draws 52 thickness of T connector of cap blank 6 big than jag.
（3）, the manufactured goods 1 of a mould are automatically shifted to No. two mould mouths with mechanical clamp, by rushing for No. two die nose
Tool heads into the manufactured goods 1 of a mould in No. two female die of die, and as the interior pars intramuralis of die has four muscle, the front end for rushing tool has
Raised cone, applies, under pressure punching press, to make the 2 outer surface upsetting of manufactured goods of No. two moulds go out four outwardly axial directions in punching tool
Muscle 21,21 width of axial ribs of the manufactured goods 2 of No. two moulds and jag draw the width of the jag muscle 61 on cap blank surface consistent, institute
State the radius of axial ribs 21 and jag draw cap blank do not have the bottom 42 of muscle radius consistent, the axial ribs 21 are from T-shaped
The lower section of head extends to the bottom of the manufactured goods of No. two moulds but does not extend to its bottom, also, the manufactured goods front end in No. two moulds
Face upsetting goes out the first counterbore 22, the hole section corresponding with jag muscle 61 of the aperture of the first counterbore 22 and jag drawing cap blank centre bore 62
Minimum-value aperture consistent, also, thicken the thickness of T connector 11 and elongate entire length, but 1 entire length of manufactured goods of No. two moulds
Draw cap blank short than jag, drawing reference numeral 23 is the T connector of the manufactured goods 2 of No. two moulds.
（4）, the manufactured goods 2 of No. two moulds are automatically shifted to No. three mould mouths using mechanical clamp, by No. three die nose
Punching tool heads into the manufactured goods of No. two moulds in No. three female die of die, and as there is the cone of projection punching tool front end, in die, rear end has
Push rod, the front end of push rod have the step of projection, apply under stressed extruding tool is rushed, and make the manufactured goods 3 of No. three moulds heavy first
On the basis of hole 22, continue downwards upsetting and go out the second counterbore 31, the diameter of the second counterbore 31 is less than the diameter of the first counterbore 22, and
Rear end upsetting goes out the second location hole 32, and makes the manufactured goods 3 of No. three moulds not have the external diameter of the bottom 33 of axial ribs and the axial direction
The external diameter of muscle 21 is consistent, makes the surface at setting axial ribs switch to groove type, and drawing reference numeral 34 is the groove on surface, also, draws
Long entire length, makes 3 entire length of manufactured goods of No. three moulds and jag draw the length of cap blank 6 consistent, the making of No. three moulds
Product 3 do not have the length of the bottom 33 of axial ribs and jag draws bottom 42 length of the cap blank with jag muscle 61 consistent.
（5）, the manufactured goods 3 of No. three moulds are automatically shifted to No. four mould mouths using mechanical clamp, by No. four die nose
Punching tool heads into the manufactured goods of No. three moulds in No. four female die of die, as there is the cone of projection punching tool front end, applies pressure in punching tool
Under the extruding of power, make between the second counterbore 31 of the manufactured goods of No. three moulds and the second location hole 32 by logical iron filings 41, after insertion
Second counterbore 31 and 32 length of the second location hole and jag draw cap blank 6 not have length and the internal diameter of the bottom of jag muscle 61
Unanimously, the bottom 42 without jag muscle 61 that jag draws cap blank 6 is formed, makes the manufactured goods 4 of No. four moulds.
（6）, the manufactured goods 4 of No. four moulds are automatically shifted to No. five mould mouths using mechanical clamp, by No. five die nose
Punching tool heads into the manufactured goods 4 of No. four moulds in No. five female die of die, and due to die internal diameter step not of uniform size, punching tool front end has
Raised step, applies under stressed extruding tool is rushed, is counter-bored the top of the first counterbore section, the manufactured goods of No. five moulds
5 form two knotholes, and the centre bore 54 with the manufactured goods 5 of hole No. five moulds of composition below in the first counterbore section, two knotholes
The position of connecting part 51 and jag draw the position at the maximum gauge that cap blank jag muscle is bloated corresponding, and by No. two mould shapes
The T connector 23 for becoming is depressed into, formation jag drawing cap blank consistent with the consistency of thickness of the T connector of jag drawing cap blank, diameter
T connector 52, and formed jag draw cap blank T connector below step 53.
（7）, the manufactured goods 5 of No. five moulds are automatically shifted to No. six mould mouths using mechanical clamp, by No. six die nose
Punching tool heads into the manufactured goods 5 of No. five moulds in No. six female die of die, and the front end for rushing tool has been cut into four and has had hole, mould rear end
A long cone made by push rod, applies under stressed extruding tool is rushed, and punching tool drives the manufactured goods 5 of No. five moulds to move down, and makes
Preshoot tool squeezed into by push rod afterwards, and four expansions of punching tool strut the centre bores 54 of the manufactured goods 5 of No. five moulds, complete jag and draw cap blank
Jag works, and forms jag and draws the jag muscle 61 that bloats of centre of cap blank and the centre bore 62 that median pore radius are bigger, makes
Final jag draws cap blank 6；The jag for being formed draws the main body 6 of cap blank in cylinder, and the cylinder has centre bore 62,
The mid diameter of the hole section corresponding with jag muscle 61 of centre bore 62 is bigger, and there is the jag muscle bloated in the middle of several on the surface of cylinder
61, the bottom 42 of the cylinder does not have jag muscle 61, and the aperture of bottom 42 is little compared with the aperture above which, and jag draws cap blank
Upper end have T connector 52, T connector 52 is rounded, has step 53 below T connector.
Claims (1)
1. a kind of jag draws the manufacture method of cap blank, is first annealed using steel billet materials, then carries out phosphate surface process,
Essence takes out sizing processing, finally carries out the molding procedure that jag draws cap blank in cold header, specifically includes following steps：
（1）, essence is taken out the circle of the disk after sizing material automatic shearing in cold header sent into by feed wheel be cut into single jag and draw cap
Blank raw material part；
（2）, jag drawing cap blank raw material part moved on to a mould mouth of cold header, will by the tool that rushes of a die nose
Jag draws cap blank raw material part to head in a female die of die, through the cold-heading manufacture in a mould, makes making for a mould
Product front end is molded T connector, and extrudes the first location hole on T connector, while reducing entire length, makes the manufactured goods of a mould whole
Body length is shorter than jag drawing cap blank, and the T connector of the manufactured goods of a mould is rounded, and its diameter draws cap blank than jag
T connector diameter is little, and thickness draws the T connector thickness of cap blank big than jag；
（3）, the manufactured goods of a mould are moved on to No. two mould mouths, rush tool by the manufactured goods top of a mould by No. two die nose
Enter in No. two female die of die, through the cold-heading manufacture in No. two moulds, go out the manufactured goods outer surface upsetting of No. two moulds and draw with jag
The consistent outwardly axial ribs of the jag muscle quantity of cap blank, the axial ribs width of the manufactured goods of No. two moulds and jag draw
The width of the jag muscle on cap blank surface is consistent, and the radius of the axial ribs and jag draw cap blank not have the bottom of muscle
Radius consistent, the axial ribs extend to the bottom of the manufactured goods of No. two moulds but do not extend to its bottom from the lower section of T connector,
Also, the manufactured goods front end face upsetting in No. two moulds goes out the first counterbore, the aperture of the first counterbore and jag draw cap blank centre bore
Consistent with the minimum-value aperture of the corresponding hole section of jag muscle, also, thicken the thickness of the T connector of a molded product and elongate entirety
Length, but the manufactured goods entire length of No. two moulds draws cap blank short than jag；
（4）, the manufactured goods of No. two moulds are moved on to No. three mould mouths, rush tool by the manufactured goods top of No. two moulds by No. three die nose
Enter in No. three female die of die, through the cold-heading manufacture in No. three moulds, the manufactured goods of No. three moulds are made on the basis of the first counterbore,
Continue downwards upsetting and go out the second counterbore, the diameter of the second counterbore is less than the diameter of the first counterbore, and goes out the second location hole in rear end upsetting,
And make the manufactured goods of No. three moulds do not have the bottom of axial ribs external diameter consistent with the external diameter of the axial ribs, make setting axial ribs
The surface at place switchs to groove type, also, elongates entire length, makes the manufactured goods entire length of No. three moulds and jag draw cap blank
Length consistent, the manufactured goods of No. three moulds do not have the length of the bottom of axial ribs and jag draws cap blank not have jag muscle
Lower length consistent；
（5）, the manufactured goods of No. three moulds are moved on to No. four mould mouths, rush tool by the manufactured goods top of No. three moulds by No. four die nose
Enter in No. four female die of die, through the cold-heading manufacture in No. four moulds, determine the second counterbore of the manufactured goods of No. three moulds and second
By logical iron filings between the hole of position, the second counterbore after insertion and second positions hole length and jag drawing cap blank with jag muscle
Bottom length consistent with internal diameter, formed jag draw cap blank not have jag muscle bottom, make the system of No. four moulds
Finished product；
（6）, the manufactured goods of No. four moulds are moved on to No. five mould mouths, rush tool by the manufactured goods top of No. four moulds by No. five die nose
Enter in No. five female die of die, through the cold-heading manufacture in No. five moulds, be counter-bored the top of the first counterbore section, No. five moulds
Manufactured goods form two knotholes in the first counterbore section, and and hole below constitute the centre bore of the manufactured goods of No. five moulds, two sections
The position of the connecting part in hole and jag draw the position at the maximum gauge that cap blank jag muscle is bloated corresponding, and by No. two moulds
The T connector of formation is depressed into, formation jag drawing cap blank consistent with the consistency of thickness of the T connector of jag drawing cap blank, diameter
T connector, and formed jag draw cap blank T connector below step；
（7）, the manufactured goods of No. five moulds are moved on to No. six mould mouths, rush tool by the manufactured goods top of No. five moulds by No. six die nose
Enter in No. six female die of die, through the cold-heading manufacture in No. five moulds, the centre bore of the manufactured goods of No. five moulds is strutted, completes jag
The work of cap blank jag is drawn, is formed jag and draws the bigger center of jag muscle that the centre of cap blank bloats and median pore radius
Hole, makes final jag and draws cap blank；The jag for being formed draws the main body of cap blank in cylinder, and the cylinder has centre
The bigger centre bore in aperture, the bottom that there is the jag muscle bloated in the middle of several, the cylinder on the surface of cylinder do not have jag muscle,
The aperture of bottom is little compared with the aperture above which, and jag draws the upper end of cap blank to have T connector, and T connector is rounded, below T connector
There is step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610861405.3A CN106475502B (en) | 2016-09-29 | 2016-09-29 | A kind of jag draws the manufacturing method of cap blank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610861405.3A CN106475502B (en) | 2016-09-29 | 2016-09-29 | A kind of jag draws the manufacturing method of cap blank |
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| CN106475502A true CN106475502A (en) | 2017-03-08 |
| CN106475502B CN106475502B (en) | 2018-12-11 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106964748A (en) * | 2017-03-24 | 2017-07-21 | 常州永茂特种紧固件有限公司 | The processing method and its processing tool of piston rod |
| CN109013996A (en) * | 2018-09-06 | 2018-12-18 | 宁波思明汽车附件有限公司 | A kind of cold-heading molding valve cock and its moulding process |
| CN109092986A (en) * | 2018-10-29 | 2018-12-28 | 佛山市南海区桥亿五金电器有限公司 | A kind of processing method of T font component |
| CN110180988A (en) * | 2019-06-13 | 2019-08-30 | 广州市科镁隆五金有限公司 | A kind of lantern type rivet nut production technology |
| CN112247053A (en) * | 2020-09-22 | 2021-01-22 | 宁波华虹机械有限公司 | Production process of damper bushing blank |
| CN113857420A (en) * | 2021-08-23 | 2021-12-31 | 宁波安拓实业有限公司 | Manufacturing method of vehicle chassis system fixing rod |
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| US3570031A (en) * | 1966-05-27 | 1971-03-16 | Garonne Ets Auriol & Cie | Die,and method of manufacturing calibrated rivets |
| CN1476945A (en) * | 2002-08-21 | 2004-02-25 | 宏达科技股份有限公司 | Tension cap forming method |
| CN102125943A (en) * | 2010-11-29 | 2011-07-20 | 宁波安拓实业有限公司 | Manufacturing process of hose coupling |
| CN102152061A (en) * | 2010-11-29 | 2011-08-17 | 宁波安拓实业有限公司 | Process for manufacturing outer sleeve blanks |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB685834A (en) * | 1949-01-21 | 1953-01-14 | Patent Und Versuchs Anstalt | A process for the manufacture of high strength shaped articles |
| US3570031A (en) * | 1966-05-27 | 1971-03-16 | Garonne Ets Auriol & Cie | Die,and method of manufacturing calibrated rivets |
| CN1476945A (en) * | 2002-08-21 | 2004-02-25 | 宏达科技股份有限公司 | Tension cap forming method |
| CN102125943A (en) * | 2010-11-29 | 2011-07-20 | 宁波安拓实业有限公司 | Manufacturing process of hose coupling |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106964748A (en) * | 2017-03-24 | 2017-07-21 | 常州永茂特种紧固件有限公司 | The processing method and its processing tool of piston rod |
| CN109013996A (en) * | 2018-09-06 | 2018-12-18 | 宁波思明汽车附件有限公司 | A kind of cold-heading molding valve cock and its moulding process |
| CN109092986A (en) * | 2018-10-29 | 2018-12-28 | 佛山市南海区桥亿五金电器有限公司 | A kind of processing method of T font component |
| CN110180988A (en) * | 2019-06-13 | 2019-08-30 | 广州市科镁隆五金有限公司 | A kind of lantern type rivet nut production technology |
| CN112247053A (en) * | 2020-09-22 | 2021-01-22 | 宁波华虹机械有限公司 | Production process of damper bushing blank |
| CN113857420A (en) * | 2021-08-23 | 2021-12-31 | 宁波安拓实业有限公司 | Manufacturing method of vehicle chassis system fixing rod |
| CN113857420B (en) * | 2021-08-23 | 2023-07-07 | 宁波安拓实业有限公司 | Manufacturing method of chassis system fixing rod for vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106475502B (en) | 2018-12-11 |
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