CN207681306U - A kind of automobile drive axle adjusting nut deep-drawing shaping die - Google Patents
A kind of automobile drive axle adjusting nut deep-drawing shaping die Download PDFInfo
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- CN207681306U CN207681306U CN201721673773.1U CN201721673773U CN207681306U CN 207681306 U CN207681306 U CN 207681306U CN 201721673773 U CN201721673773 U CN 201721673773U CN 207681306 U CN207681306 U CN 207681306U
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- loading
- plate
- unloading material
- bolt
- ejector
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Abstract
The utility model discloses a kind of automobile drive axle adjusting nut deep-drawing shaping dies, including upper mold and lower die, upper mold includes cope plate, upper padding plate, upper mould fixed plate and loading and unloading material device, forming convax mould is equipped among the bottom of upper mould fixed plate, loading and unloading material device includes loading and unloading material spring and loading and unloading material plate, loading and unloading material plate is suspended in the lower section of upper mould fixed plate by loading and unloading material spring horizontal, the intermediate discharging hole of loading and unloading material plate and the punch-pin mould body of forming convax mould are slidably connected, it is additionally provided with downlink limiting device between the loading and unloading material plate and cope plate, lower die includes molding concave die, lower bolster and lower template, the forming recess bosom of molding concave die is equipped with locating piece, the lower section of locating piece is equipped with bottom knockout bar, the lower section of bottom knockout bar is equipped with ejector.The utility model can be such that blank drawing and forming and the overall process of discharging stablizes；It can ensure that die point gap is stablized for a long time, improve die life.
Description
Technical field
The utility model belongs to machine processing field, is related to a kind of adjusting nut deep-drawing shaping die, more particularly to
A kind of mold of automobile drive axle adjusting nut drawing and forming.
Background technology
The adjusting nut of automobile drive axle is mounted on the component of final drive casing and main reducing gear shell cover composition, mainly
Effect is to adjust the installation site of differential bearing, while playing the role of reinforcing differential case bearing bracket rigidity.
The traditional mode of production of adjusting nut is that point six procedures are processed, and first single-point plate shearing machine is used to implement process
One blanking is processed, and then uses single-point open type steam-operating forcing press to implement the processing of two blanking of process, then use single-point open type steam-operating pressure
Power machine implements process three and rushes center hole machined, then uses Closed Hydraulic machine to implement the processing of four drawing and forming of process, followed by adopting
Implement the punching installation hole machined of process five with single-point open type steam-operating forcing press, finally uses lathe to implement six outer circle thread of process and add
Work.Wherein, four drawing and forming of process using traditional processing technology is produced using Closed Hydraulic machine, and used mould structure is multiple
It is miscellaneous, operating procedure is more, cause production time-consuming, cause production efficiency relatively low.
The utility model is based on optimization property existing for production technology in the prior art and considers, designs a kind of adjustment spiral shell
The mold of female drawing and forming can be such that blank drawing and forming process stablizes, in this way by designing a kind of energy satisfaction production adjusting nut
The mold of drawing and forming improves the production efficiency of product, just seems very necessary.
Utility model content
The purpose of this utility model is that optimizing the deficiency of existing production technology, adapts to reality and need, a kind of automobile is provided
The mold of drive axle adjusting nut drawing and forming.
In order to realize that the purpose of this utility model, the technical solution adopted in the utility model be：
A kind of automobile drive axle adjusting nut deep-drawing shaping die, including upper mold and lower die,
The upper mold includes cope plate, upper padding plate, upper mould fixed plate and loading and unloading material device, the bottom of the upper mould fixed plate
Centre is equipped with forming convax mould, and the loading and unloading material device includes loading and unloading material spring and loading and unloading material plate, and loading and unloading material plate passes through loading and unloading material bullet
Spring horizontal suspension connects in the lower section of upper mould fixed plate, the intermediate discharging hole of loading and unloading material plate and the punch-pin mould body sliding of forming convax mould
It connects, downlink limiting device is additionally provided between the loading and unloading material plate and cope plate,
The lower die includes molding concave die, lower bolster and the lower template being fastenedly connected successively from top to bottom,
The forming recess bosom of the molding concave die is equipped with locating piece, and the lower section of locating piece is equipped with bottom knockout bar, under
The lower section of ejector beam is equipped with ejector, the forming convax mould, molding concave die and locating piece collectively constitute the drawing of adjusting nut at
Type cavity.
Further, the ejector include ejector top board, excellent power rubber, ejector pull rod, ejector lower platen and
Ejector fastener；Ejector top board is located at the lower section of lower template and is equipped with an excellent power rubber, the excellent power rubber below
The lower section of glue is equipped with an ejector lower platen, and the lower section of the ejector lower platen is equipped with two pieces ejector fastening nut, institute
The ejector pull rod that is internally provided with of ejector fastening nut is stated, the upper end of the ejector pull rod is located at the interior of lower template
Portion.
Further, the downlink limiting device is lifting bolt, and loading and unloading material plate is connect with cope plate by lifting bolt, hung
Bolt body and the lifting bolt hole of cope plate, upper padding plate and upper mould fixed plate for filling bolt are slidably connected, lift bolt bolt cap and
The lifting bolt hole of upper padding plate jointly limits loading and unloading material plate downlink.
Further, the upper surface of the molding concave die is uniformly distributed on peripheries with limited block, and limited block limits loading and unloading material plate downlink.
Further, the lower part of the locating piece is evenly equipped with four caging bolts, the bolt body of caging bolt and lower bolster and under
The caging bolt hole longitudinal sliding motion connection of template, caging bolt limit locating piece uplink.
Further, guide post guide sleeve structure is provided between the upper mold and lower die, the template guide sleeve is matched by interference
Conjunction is connect with the dowel hole of cope plate, and the template guide post is connect by being interference fitted with the guide pillar hole of lower template.
Further, interior guide sleeve inner guiding post structure is equipped between the upper mould fixed plate and molding concave die, the upper mold is fixed
The inside circumference of plate is equipped with four inner guiding posts, and molding concave die inside circumference is equipped with four interior guide sleeves, in four inner guiding posts and four
Guide sleeve is the clearance fit between gap is gradually reduced.
Further, the lower left corner of the cope plate, upper padding plate and upper mould fixed plate lower surface is all equipped with " L-shaped " circular hole, institute
The lower left corner for stating molding concave die, lower bolster and lower template upper surface is all equipped with " L-shaped " circular hole.
Further, the upper padding plate is mounted on the lower section of cope plate by bolt and positioning pin, and upper mould fixed plate passes through spiral shell
Bolt and positioning pin are mounted on the lower section of upper padding plate, and forming convax mould is fixed by being interference fitted and being bolted to be fastenedly connected in upper mold
The inside of plate and the lower section of upper padding plate；The loading and unloading material spring has four, four loading and unloading material springs be distributed on upper mould fixed plate with
Between loading and unloading material plate, the upper end of loading and unloading material spring is separately positioned in the through-hole inside upper mould fixed plate, and lower end is separately positioned on
In the Blind locating holes of loading and unloading material intralamellar part.
Further, the molding concave die is fastened on the top of lower bolster, the lower bolster by bolt and positioning pin
It is fastened on the top of lower template by bolt and positioning pin, the forming recess of the locating piece and molding concave die is matched for gap
Connection is closed and slides up and down, four caging bolts are connected through a screw thread mounted on the lower section of locating piece, the bottom knockout bar
There are four, intermediate ejector beam via of four bottom knockout bars respectively with lower bolster and lower template is slidably connected.
The beneficial effects of the utility model are：
1. the ejector of the utility model can effectively enhance the stability of mold discharging, blank drawing and forming and discharging can be made
Overall process stablize；
2. installation guide post guide sleeve structure can ensure mold for a long time inside the upper mould fixed plate and molding concave die of the utility model
Cutting edge radius is stablized, and die life can be effectively improved；
3. the molding concave die work cutting edge upper surface of the utility model can make blank drawing and forming by limited block limit
Process stabilization can guarantee that the face shaping of adjusting nut is regular and strength character is stablized；
4. each piece surface for stacking installation is needed to process " L-shaped " circle of identical direction in the upper and lower mould of the utility model
The structure of the anti-back mark in hole, front-rear direction is installed reversed maloperation and is occurred when can effectively prevent mold assembly.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the overlooking structure diagram of the utility model part of the lower die；
Fig. 3 is the main structure diagram after workpiece drawing and forming；
Fig. 4 is the overlooking structure diagram after workpiece drawing and forming；
In figure, cope plate 1, template guide sleeve 2, upper padding plate 3, upper mould fixed plate 4, inner guiding post 5, loading and unloading material spring 6, molding it is convex
Mould 7, loading and unloading material plate 8, molding concave die 9, limited block 10, interior guide sleeve 11, lower bolster 12, template guide post 13, adjusting nut 14, positioning
Block 15, lower template 16, bottom knockout bar 17, caging bolt 18, ejector top board 19, excellent power rubber 20, ejector pull rod 21, top
Glassware lower platen 22, ejector fastening nut 23.
Specific implementation mode
The utility model is further illustrated with reference to the accompanying drawings and examples：
Embodiment：Shown in Fig. 1-Fig. 4, a kind of automobile drive axle adjusting nut deep-drawing shaping die, including upper mold with
Lower die, the upper mold include cope plate 1, upper padding plate 3, upper mould fixed plate 4 and loading and unloading material device, the bottom of the upper mould fixed plate 4
Forming convax mould 7 is equipped among portion, the loading and unloading material device includes loading and unloading material spring 6 and loading and unloading material plate 8, and loading and unloading material plate 8 is by upper
6 horizontal suspension of discharging spring is in the lower section of upper mould fixed plate 4, the intermediate discharging hole of loading and unloading material plate 8 and the punch-pin mould of forming convax mould 7
Body is slidably connected, and downlink limiting device is additionally provided between the loading and unloading material plate 8 and cope plate 1, and the lower die includes from top to bottom
Molding concave die 9, lower bolster 12 and the lower template 16 being fastenedly connected successively,
The forming recess bosom of the molding concave die 9 is equipped with locating piece 15, and the lower section of locating piece 15 is equipped with bottom knockout
The lower section of bar 17, bottom knockout bar 17 is equipped with ejector, and the forming convax mould 7, molding concave die 9 and locating piece 15 collectively constitute adjustment
The drawing and forming cavity of nut 14.
The ejector includes ejector top board 19, excellent power rubber 20, ejector pull rod 21,22 and of ejector lower platen
Ejector fastener；Ejector top board 19 is located at the lower section of lower template 16 and is equipped with an excellent power rubber 20 below, described
The lower section of excellent power rubber 20 is equipped with an ejector lower platen 22, and the lower section of the ejector lower platen 22 is equipped with two pieces ejector
Fastening nut 23, the ejector fastening nut 23 are internally provided with an ejector pull rod 21, the ejector pull rod 21
Upper end is located at the inside of lower template 16.This ejector can effectively enhance the stability of mold discharging, can make blank drawing and forming
Process is stablized.
The downlink limiting device is lifting bolt, and loading and unloading material plate 8 is connect by lifting bolt with cope plate 1, lifts spiral shell
The bolt body of bolt is slidably connected with the lifting bolt hole of cope plate 1, upper padding plate 3 and upper mould fixed plate 4, lift the bolt cap of bolt with it is upper
The lifting bolt hole of backing plate 3 jointly limits 8 downlink of loading and unloading material plate.
The upper surface of the molding concave die 9 is uniformly distributed on peripheries with limited block 10, and limited block 10 limits 8 downlink of loading and unloading material plate,
Molding concave die work cutting edge upper surface can make blank drawing and forming process stabilization can guarantee adjustment spiral shell by the limit of limited block 10
Female face shaping is regular and strength character is stablized.
The lower part of the locating piece 15 is evenly equipped with four caging bolts 18, the bolt body of caging bolt 18 and lower bolster 12 and under
The caging bolt hole longitudinal sliding motion connection of template 16, caging bolt 18 limit 15 uplink of locating piece.
Be provided with guide post guide sleeve structure between the upper mold and lower die, the template guide sleeve 2 by interference fit with it is upper
The dowel hole of template 1 connects, and the template guide post 13 is connect by being interference fitted with the guide pillar hole of lower template 16.
Interior guide sleeve inner guiding post structure is equipped between the upper mould fixed plate 4 and molding concave die 9, the upper mould fixed plate 4
Inside circumference is equipped with four inner guiding posts 5, and 9 inside circumference of molding concave die is equipped with four interior guide sleeves 11, in four inner guiding posts 5 and four
Guide sleeve 11 is the clearance fit between gap is gradually reduced.Installation guide post guide sleeve structure can inside this upper mould fixed plate and molding concave die
It is long-term to ensure that die point gap stabilization effectively improves die life.
The lower left corner of 4 lower surface of the cope plate 1, upper padding plate 3 and upper mould fixed plate all be equipped with " L-shaped " circular hole, it is described at
The lower left corner of 16 upper surface of type cavity plate 9, lower bolster 12 and lower template is all equipped with " L-shaped " circular hole.It needs to stack installation in this upper and lower mould
Each part equipped with " L-shaped " circular hole counnter attack mark structure mold can be effectively prevent to assemble when front-rear direction reversed maloperation is installed
Occur.
The upper padding plate 3 is mounted on the lower section of cope plate 1 by bolt and positioning pin, upper mould fixed plate 4 by bolt and
Positioning pin is mounted on the lower section of upper padding plate 3, and forming convax mould 7 is fastenedly connected by being interference fitted and being bolted in upper mould fixed plate
4 inside and the lower section of upper padding plate 3；The loading and unloading material spring 6 has four, and four loading and unloading material springs 6 are distributed on upper mould fixed plate 4
Between loading and unloading material plate 8, the upper end of loading and unloading material spring 6 is separately positioned in the through-hole inside upper mould fixed plate 4, and lower end is set respectively
It sets in the Blind locating holes inside loading and unloading material plate 8.
The molding concave die 9 is fastened on the top of lower bolster 12 by bolt and positioning pin, and the lower bolster 12 is logical
It crosses bolt and positioning pin is fastened on the top of lower template 16, between the forming recess of the locating piece 15 and molding concave die 9 is
Gap coordinates and slides up and down connection, and four caging bolts 18 are connected through a screw thread mounted on the lower section of locating piece 15, described
Bottom knockout bar 17 has four, and four bottom knockout bars 17 connect with lower bolster 12 and the sliding of the intermediate ejector beam via of lower template 16 respectively
It connects.
The operation principle of utility model is summarized as follows：
The adjusting nut of such drive axle be by 4.5mm thickness hot rolled plate it is stamped be processed into, in blanking procedure and fall
The processing of deep-drawing shaping die can be used for after material punching operation：
The utility model mold is mounted on single-point open type steam-operating 160T forcing presses by the first step.
Adjusting nut 14 after blanking and punching process is placed on the top of locating piece 15, and makes adjusting nut by second step
14 intermediate inner hole sleeve is in the outer end of the positioning spigot of locating piece 15.
Third walks, and starts forcing press and carries out punch process to adjusting nut 14, workbench on lathe, forming convax mould 7 and
Loading and unloading material plate 8 moves downwardly together, and in the process, inner guiding post 5 is introduced into the inside of interior guide sleeve 11, then loading and unloading material plate 8 with
The upper surface of adjusting nut 14 first contacts and is moved upwards with 6 thrust downward because of compression of loading and unloading material spring, then adjusts
The lower surface of nut 14 is contacted with the upper surface of molding concave die 9, and at the same time, locating piece 15 is with four caging bolts 18, four
The upward thrust and adjusting nut 14 that part bottom knockout bar 17 and ejector top board 19 are generated with excellent power rubber 20 by compression
It moves downwardly together, then forming convax mould 7 is in contact with the upper surface of adjusting nut 14 and keeps adjusting nut 14 recessed into being molded
In the forming recess of mould 9, until loading and unloading material plate 8 contacted with four limited blocks 10 and position relative to forming convax mould 7 no longer to
Until upper movement, make adjusting nut 14 between forming convax mould 7, molding concave die 9 and locating piece 15 under the action of finishing drawing at
Type is processed, and 83.0-φ of molding outer diameter φ, 83.08 mm, 14.0-14.14 mm of drawing height, molding Inner arc are reached
R1.0-R1.5 mm, 42.24-φ of diameter of bore φ, 42.36 mm, after drawing and forming, structure such as Fig. 3, the figure of workpiece
Shown in 4.
4th step, forcing press upper table face, forming convax mould 7 and loading and unloading material plate 8 one at first position back up, then ejector
Top board 19 is with excellent power rubber 20 because compressing the upward thrust generated by four bottom knockout bars 17, locating piece 15 with four
Caging bolt 18 and adjusting nut 14 jack up upwards together, until the following table of the upper surface of ejector top board 19 and lower template 16
Until face is in contact, then in guide sleeve 11 detached with inner guiding post 5, then with adsorb hand by the good adjusting nut 14 of drawing and forming from calmly
It is removed and placed in body feed tank on the block 15 of position.
The adjusting nut appearance and size made of the automobile drive axle adjusting nut deep-drawing shaping die of the utility model
Stablize in molding 83.0-φ of outer diameter φ, 83.08 mm, 14.0-14.14 mm of drawing height, molding Inner arc R1.0-
R1.5 mm, 42.24-φ of diameter of bore φ, 42.36 mm, the consistency of monnolithic case is regular, and sustainable stabilization ensures to adjust
The appearance and size of whole nut reaches the design requirement of product drawing.Production capacity is also improved while improving product quality, is adjusted
Its blank binder of nut drawing and forming process and discharging process are sufficiently stable.Single products split run production capacity is also promoted to by 2840
3800, split run production capacity improves 33.8%.
Claims (10)
1. a kind of automobile drive axle adjusting nut deep-drawing shaping die, including upper mold and lower die, which is characterized in that
The upper mold includes cope plate (1), upper padding plate (3), upper mould fixed plate (4) and loading and unloading material device, the upper mould fixed plate
(4) it is equipped with forming convax mould (7) among bottom, the loading and unloading material device includes loading and unloading material spring (6) and loading and unloading material plate (8), on
Stripper (8) is by loading and unloading material spring (6) horizontal suspension in the lower section of upper mould fixed plate (4), the intermediate discharging of loading and unloading material plate (8)
Hole and the punch-pin mould body of forming convax mould (7) are slidably connected, and downlink limit is additionally provided between the loading and unloading material plate (8) and cope plate (1)
Position device,
The lower die includes molding concave die (9), lower bolster (12) and the lower template (16) being fastenedly connected successively from top to bottom,
The forming recess bosom of the molding concave die (9) is equipped with locating piece (15), and the lower section of locating piece (15) is equipped with lower top
Expect that bar (17), the lower section of bottom knockout bar (17) are equipped with ejector, the forming convax mould (7), molding concave die (9) and locating piece (15)
Collectively constitute the drawing and forming cavity of adjusting nut (14).
2. a kind of automobile drive axle adjusting nut deep-drawing shaping die according to claim 1, which is characterized in that the top
Glassware includes ejector top board (19), excellent power rubber (20), ejector pull rod (21), ejector lower platen (22) and ejector
Fastener；Ejector top board (19) is located at the lower section of lower template (16) and is equipped with an excellent power rubber (20) below, described
The lower section of excellent power rubber (20) is equipped with an ejector lower platen (22), and the lower section of the ejector lower platen (22) is equipped with two pieces
Ejector fastening nut (23), the ejector fastening nut (23) are internally provided with an ejector pull rod (21), the top
The upper end of glassware pull rod (21) is located at the inside of lower template (16).
3. a kind of automobile drive axle adjusting nut deep-drawing shaping die according to claim 1, which is characterized in that under described
Row limiting device be lifting bolt, loading and unloading material plate (8) by lift bolt connect with cope plate (1), lift bolt bolt body and
The lifting bolt hole of cope plate (1), upper padding plate (3) and upper mould fixed plate (4) is slidably connected, and lifts the bolt cap and upper padding plate of bolt
(3) lifting bolt hole is jointly to loading and unloading material plate（8）Downlink limits.
4. a kind of automobile drive axle adjusting nut deep-drawing shaping die according to claim 1, which is characterized in that it is described at
The upper surface of type cavity plate (9) is uniformly distributed on peripheries with limited block (10), and limited block (10) limits loading and unloading material plate (8) downlink.
5. a kind of automobile drive axle adjusting nut deep-drawing shaping die according to claim 1, which is characterized in that described fixed
The lower part of position block (15) is evenly equipped with four caging bolts (18), bolt body and lower bolster (12) and the lower template of caging bolt (18)
(16) caging bolt hole longitudinal sliding motion connection, caging bolt (18) limit locating piece (15) uplink.
6. a kind of automobile drive axle adjusting nut deep-drawing shaping die according to claim 1, which is characterized in that described
Guide post guide sleeve structure, template guide sleeve are provided between upper mold and lower die（2）Connected with the dowel hole of cope plate (1) by being interference fitted
It connects, template guide post（13）It is connect with the guide pillar hole of lower template (16) by being interference fitted.
7. a kind of automobile drive axle adjusting nut deep-drawing shaping die according to claim 1, which is characterized in that on described
Interior guide sleeve inner guiding post structure, the inside circumference of the upper mould fixed plate (4) are equipped between mould fixed plate (4) and molding concave die (9)
Equipped with four inner guiding posts (5), molding concave die (9) inside circumference is equipped with four interior guide sleeves (11), four inner guiding posts (5) with four in
Guide sleeve (11) is the clearance fit between gap is gradually reduced.
8. a kind of automobile drive axle adjusting nut deep-drawing shaping die according to claim 1, which is characterized in that on described
The lower left corner of template (1), upper padding plate (3) and upper mould fixed plate (4) lower surface is all equipped with " L-shaped " circular hole, the molding concave die
(9), the lower left corner of lower bolster (12) and lower template (16) upper surface is all equipped with " L-shaped " circular hole.
9. a kind of automobile drive axle adjusting nut deep-drawing shaping die according to claim 1, which is characterized in that on described
Backing plate (3) is mounted on the lower section of cope plate (1) by bolt and positioning pin, and upper mould fixed plate (4) is pacified by bolt and positioning pin
Lower section mounted in upper padding plate (3), forming convax mould (7) are fastenedly connected by being interference fitted and being bolted in upper mould fixed plate (4)
Inside and upper padding plate (3) lower section；The loading and unloading material spring (6) has four, and it is solid that four loading and unloading material springs (6) are distributed on upper mold
Between fixed board (4) and loading and unloading material plate (8), the upper end of loading and unloading material spring (6) is separately positioned on the internal through-hole of upper mould fixed plate (4)
In, lower end is separately positioned in the internal Blind locating holes of loading and unloading material plate (8).
10. a kind of automobile drive axle adjusting nut deep-drawing shaping die according to claim 5, which is characterized in that described
Molding concave die (9) is fastened on the top of lower bolster (12) by bolt and positioning pin, and the lower bolster (12) passes through bolt
And positioning pin is fastened on the top of lower template (16), between the forming recess of the locating piece (15) and molding concave die (9) is
Gap coordinates and slides up and down connection, and four caging bolts (18) are connected through a screw thread the lower section mounted on locating piece (15),
The bottom knockout bar (17) has four, four bottom knockout bars (17) respectively with lower bolster (12) and the intermediate liftout of lower template (16)
Bar via is slidably connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721673773.1U CN207681306U (en) | 2017-12-06 | 2017-12-06 | A kind of automobile drive axle adjusting nut deep-drawing shaping die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721673773.1U CN207681306U (en) | 2017-12-06 | 2017-12-06 | A kind of automobile drive axle adjusting nut deep-drawing shaping die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207681306U true CN207681306U (en) | 2018-08-03 |
Family
ID=62996542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721673773.1U Expired - Fee Related CN207681306U (en) | 2017-12-06 | 2017-12-06 | A kind of automobile drive axle adjusting nut deep-drawing shaping die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207681306U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111589976A (en) * | 2020-05-27 | 2020-08-28 | 武汉轻工大学 | Forming device for disc type thin-wall nut |
| CN112605273A (en) * | 2020-12-23 | 2021-04-06 | 成都宏明双新科技股份有限公司 | Leveling die for end face of part with taper in high-precision die |
-
2017
- 2017-12-06 CN CN201721673773.1U patent/CN207681306U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111589976A (en) * | 2020-05-27 | 2020-08-28 | 武汉轻工大学 | Forming device for disc type thin-wall nut |
| CN111589976B (en) * | 2020-05-27 | 2021-11-02 | 武汉轻工大学 | Forming device for disc type thin-wall nut |
| CN112605273A (en) * | 2020-12-23 | 2021-04-06 | 成都宏明双新科技股份有限公司 | Leveling die for end face of part with taper in high-precision die |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180803 Termination date: 20181206 |
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| CF01 | Termination of patent right due to non-payment of annual fee |