CN106111814B - Drawing die - Google Patents
Drawing die Download PDFInfo
- Publication number
- CN106111814B CN106111814B CN201610650080.4A CN201610650080A CN106111814B CN 106111814 B CN106111814 B CN 106111814B CN 201610650080 A CN201610650080 A CN 201610650080A CN 106111814 B CN106111814 B CN 106111814B
- Authority
- CN
- China
- Prior art keywords
- hydraulic cylinder
- lower die
- holder
- blank holder
- die
- 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.)
- Expired - Fee Related
Links
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- 230000001276 controlling effect Effects 0.000 claims abstract description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 3
- 210000003205 muscle Anatomy 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 239000011324 bead Substances 0.000 description 7
- 238000000465 moulding Methods 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 210000001578 tight junction Anatomy 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/22—Deep-drawing with devices for holding the edge of the blanks
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The present invention provides a kind of drawing dies, including the upper die and lower die to shape forming cavity, the blank holder, the upper die holder upper mold to be mounted on press ram, the lower die holder to be mounted on lower die on press bench that are arranged in the lower die, further include be arranged between lower die holder and press bench, the hydraulic system of pressure-pad-force to regulating and controlling effect on blank holder.The pressure-pad-force acted on plate in forming process is regulated and controled by hydraulic system, shape technological parameter can be precisely controlled to, is conducive to improve forming effect when drawing die carries out workpiece drawing processing.
Description
Technical field
The present invention relates to a kind of drawing dies.
Background technique
Draw forming is a kind of important sheet metal forming method, as modern product part shape becomes increasingly complex,
Precision is higher and higher, also higher and higher to the technical requirements of drawing forming process, for complex parts draw forming, traditional pressure
Flange often applies identical pressure-pad-force on plate, however in large complicated drawn component (such as automobile panel) forming process
The flowing of each position metal material is inconsistent, if all applying identical pressure-pad-force around plate, has been easy to cause
A little position corrugations, some brokens.It needs to meet complex parts drawing it is necessary to alloing the pressure-pad-force of mold according to reality
Border needs to be adjusted, and blank holder is applied to the pressure-pad-force size on plate when control drawing deforms.
The pressure variable edge force that the patent of Patent No. CN201010548548.1 discloses a kind of mechanical and hydraulic linkage control is drawn
Prolong mold, including upper layer blank holder and lower layer's blank holder, is equipped with two hydraulic pumps, the work of the hydraulic pump in lower layer's blank holder lower surface
Stopper rod is connect by screw thread with lower layer blank holder, be embedded between lower layer's blank holder upper surface and upper layer blank holder lower surface it is several and
The small top pillar of the two transition fit, upper layer blank holder is by including that the insert structure of straight flange insert and arm of angle insert is constituted.It is pressing
When power machine carries out drawing to plate, the active force of hydraulic pump passes to lower layer's blank holder by piston rod, then by small top pillar power
It passes in each insert of upper layer blank holder, it is thus big to adjust the pressure-pad-force that blank holder is applied on plate when drawing deforms
It is small.However, structure is complicated and it is inaccurate to be applied to the kiss gating-feeder on plate for this technical solution.
Summary of the invention
In view of this, it is a primary object of the present invention to provide a kind of drawing die that can accurately control pressure-pad-force.
The present invention provides a kind of drawing die, including to shape forming cavity upper die and lower die, be arranged in the lower die
Blank holder, to the upper mold is mounted on press ram upper die holder, the lower die is mounted on press machine
Lower die holder on workbench further includes that setting exists between the lower die holder and the press bench, to regulating and controlling effect
The hydraulic system of pressure-pad-force on the blank holder.
Using this structure, by added between the lower die holder and press bench of former drawing die hydraulic system come
The pressure-pad-force acted on plate is adjusted and is controlled, shape technological parameter can be precisely controlled to, and then adjust and formed
Draw-bead structure, be conducive to improve drawing die made by bead forming effect；Meanwhile it can be with using hydraulic system
Adjustment pressure-pad-force in real time, can affecting laws preferably to forming parameters carry out experimental study, be conducive to preferably study
INTERACTION PROBLEMS between flanging and bead in understanding forming process.In addition, aforementioned hydraulic system can be added directly in former mould
Between the lower die holder and press bench of tool, without carrying out biggish structure of modification to original mould, suitability is strong.
Preferably, the hydraulic system includes one being arranged in parallel between the lower die holder and the press bench
Hydraulic cylinder case and the multiple hydraulic cylinders being mounted on the hydraulic cylinder case, the end of the piston rod of this multiple hydraulic cylinders and the pressure
The bottom of flange connects.
Preferably, the multiple hydraulic cylinder is located at below the blank holder and along the circumferentially distributed of the blank holder.
Blank holder stress can be guaranteed since the multiple hydraulic cylinder is along the circumferentially distributed of blank holder using this structure
Uniformly, so improve drawing die made by bead forming effect.
Preferably, the side surface of the hydraulic cylinder case has opening outwardly and the multiple hydraulic cylinder is more correspondingly
A groove, the main body of the hydraulic cylinder are placed in corresponding groove.
Using this structure, the structure of the hydraulic system can simplify, compress its occupied installation space, make drawing
The topology layout of mold is more reasonable, and structure is more compact.
Preferably, it is equipped with and is corresponded along the vertical direction through setting, with the multiple hydraulic cylinder on the lower die holder
Multiple mandrils, the bottom of the blank holder be equipped with connect with it and with the multiple transition correspondingly of the multiple mandril
Bar, the top of the piston rod of the hydraulic cylinder passes sequentially through the mandril, transiting rod is connect with the blank holder.
Using this structure, the top of the piston rod of the hydraulic cylinder passes sequentially through the mandril, transiting rod and the pressure
Flange connection, with piston rod compared with blank holder is directly connected to, on the one hand can reduce the requirement to piston rod intensity, another party
Face can be buffered with the reciprocating motion of the piston rod of hydraulic cylinder.
Preferably, the connector sleeve through its setting, the top of the piston rod are equipped on the top plate of the hydraulic cylinder case
It is connect with the bottom end of mandril by the connector sleeve.
Alignment using this structure, when can guarantee that piston rod is connect with mandril by the connector sleeve.
Preferably, the top plate of the hydraulic cylinder case has reinforcing rib, and the mounting hole to configure the connector sleeve is provided with
On the reinforcing rib.
Using this structure, it can guarantee the intensity of the hydraulic cylinder case volume top plate to open up mounting hole, and then guarantee liquid
The setting stability of cylinder pressure.
Preferably, the upper mold is cavity plate, and the lower die is punch-pin.
Preferably, the shape specification of the type chamber and automobile panel is consistent, to shape the automobile panel.
Detailed description of the invention
Fig. 1 is the perspective view of drawing die；
Fig. 2 is the cross-sectional view of drawing die；
Fig. 3 is the sectional front view of drawing die shown in Fig. 2；
Fig. 4 is the schematic diagram of lower die holder；
Fig. 5 is the exploded view of partition and hydraulic cylinder case.
Specific embodiment
It is described in detail referring to the specific embodiment of Fig. 1~5 pair drawing die of the present invention.
As shown in fig. 1~fig. 5, drawing die of the present invention mainly includes being sequentially overlapped to connect the upper of setting from top to bottom
Partition 11, upper die holder 12, cavity plate (constituting upper mold) 13, blank holder 21, punch-pin (constituting lower die) 22, lower die holder 23, partition 24, liquid
Cylinder pressure case 25, lower clapboard 26, wherein upper spacer 11 is mounted on press ram 31, and cavity plate 13 is arranged on upper die holder 12；Under
Partition 26 is mounted on press bench 32, and punch-pin 22 and blank holder 21 are arranged on lower die holder 23, in addition, in lower die holder 23
Wearing plate is additionally provided between blank holder 21；Drawing die is under molding state, and cavity plate 13 is interlocked with punch-pin 22, by the two
The region structure forming cavity limited, in the present embodiment, the shape specification of the type chamber and automobile panel is consistent, at
Shape automobile panel.Draw-bead structure is typically provided in the side binder area (i.e. between cavity plate 13 and blank holder 21) of cavity plate 13.
In the drawing die course of work, punch-pin 22 and the components such as blank holder 21 and lower die holder 23 are usually fixed, press ram
31 drive cavity plate 13 to move back and forth on direction relative to punch-pin 22 in molding/die sinking by upper die holder 12.
As shown in figure 5, hydraulic cylinder case 25 be in partially flat box-like, it be arranged between lower die holder 23 and lower clapboard 26 and with this two
The parallel setting of person is equipped with 12 grooves 251 of opening outwardly, in the groove 251 on the side surface of hydraulic cylinder case 25
The first mounting hole 252 is offered on lower wall (i.e. the bottom plate of hydraulic cylinder case 25), in upper wall (the i.e. hydraulic cylinder case 25 of the groove 251
Top plate) on be typically provided with reinforcing rib, offered at reinforcing rib on the upper wall of groove 251 opposite with the first mounting hole 252
The second mounting hole (constituting mounting hole) 253 being arranged, is equipped with the top plate through hydraulic cylinder case 25 in second mounting hole 253
The connector sleeve 42 of setting.It is received respectively in aforementioned 12 grooves 251 hydraulic equipped with 12 be arranged in a one-to-one correspondence with them
Cylinder 4, as shown in Figures 2 and 3, the bottom end of hydraulic cylinder 4 are mounted on lower clapboard 26, remainder (i.e. the main body of hydraulic cylinder 4)
It is housed in groove 251, the top of the piston rod 41 of hydraulic cylinder 4 is placed in connector sleeve 42 by lower section.As shown in Figure 1 and Figure 5, preceding
It states 12 hydraulic cylinders 4 and is located at the lower section of blank holder 21 and circumferentially distributed along its.
As shown in Figures 2 and 3, it is equipped on lower die holder 23 and runs through setting and 12 hydraulic cylinders 4 one by one along the vertical direction
Corresponding 12 mandrils 231, the bottom of blank holder 21 open up with aforementioned 12 mandrils 231 correspond and it is opening down
12 blind holes, in each blind hole be equipped with transiting rod 211.The bottom end of mandril 231 is placed in connector sleeve 42 by top, the top
The top of bar 231 is connect with the bottom end of transiting rod 211, and the top of transiting rod 211 is connected on blank holder 21, thus makes hydraulic cylinder
The top of 4 piston rod 41 passes sequentially through connector sleeve 42, mandril 231, transiting rod 211 and connect with blank holder 21.By aforementioned hydraulic
25,12 hydraulic cylinders 4 of cylinder case constitute hydraulic system of the present invention, this 12 hydraulic cylinders 4 by drawing die control
System control, to adjust pressure-pad-force of the control action on blank holder 21 in Auto Panel Forming Processes.
Above structure is combined to describe referring to Figure of description 1~5, to the working principle of drawing die of the present invention
It is briefly described.
The plate for being used to make automobile panel is placed on blank holder 21, cavity plate 13 drives lower edge in press ram 31
Molding direction move down, then cavity plate 13 is contacted with blank holder 21, plate is pressed on punch-pin 22 by the cavity plate 13, complete
Molding；
Upper die holder 12 drives cavity plate 13 to move downward, and when cavity plate 13 is contacted with plate, external hydraulic cylinder 4 starts band dynamic pressure
Flange 21 moves upwards, and cavity plate 13 is moved downward with 21 zonula occludens movable plate part of blank holder, and external hydraulic cylinder 4 keeps constant pressure at this time
Power, to guarantee to provide stable pressure-pad-force for the forming of plate, until workpiece is fully formed end；
It being demoulded after workpiece draw forming, upper die holder 12 drives cavity plate 13 to move upwards, when moving to home position,
External hydraulic cylinder 4 drives blank holder 21 to move upwards, and blank holder 21 drives Forming Workpiece to move upwards at this time, carries out discharging.
Drawing die of the present invention is mainly used for automobile panel draw forming, passes through the lower die holder in former drawing die
Hydraulic system is added between 23 and press bench 32 the pressure-pad-force acted on plate is adjusted and be controlled, it can
It is precisely controlled to shape technological parameter, and then adjusts and is formed by draw-bead structure, is conducive to improve drawing made by drawing die
Prolong the forming effect of muscle；Meanwhile pressure-pad-force can be adjusted in real time using hydraulic system, it can be preferably to the shadow of forming parameters
Sound rule carries out experimental study, is conducive to interact between flanging and bead in preferably research understanding forming process and ask
Topic.In addition, aforementioned hydraulic system can be added directly between the lower die holder 23 and press bench 32 of original mould, without to original
Mold carries out biggish structure of modification, and suitability is strong.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention.It is all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
For example, in the above-described embodiments, the top of the piston rod 41 of hydraulic cylinder 4 pass sequentially through connector sleeve 42, mandril 231,
Transiting rod 211 is connect with blank holder 21, however is not limited to this, can also omit connector sleeve 42, mandril 231 and transiting rod 211,
Blank holder 21 will be entered after the upper cover for sequentially passing through hydraulic cylinder 4 after the extension of piston rod 41 of hydraulic cylinder 4 from bottom to top, lower die holder 23
In the blind hole of bottom, it is achieved in the connection of piston rod 41 Yu blank holder 21.
Claims (4)
1. a kind of drawing die, including to shape forming cavity upper die and lower die, be arranged in the lower die blank holder (21), use
With the upper mold is mounted on press ram (31) upper die holder (12), to by the lower die be mounted on press machine work
Lower die holder (23) on platform (32), which is characterized in that further include being arranged in the lower die holder (23) and the press bench
(32) hydraulic system of the pressure-pad-force between, to regulating and controlling effect on the blank holder (21),
The hydraulic system includes the liquid being arranged in parallel between the lower die holder (23) and the press bench (32)
Cylinder pressure case (25) and the multiple hydraulic cylinders (4) being mounted on the hydraulic cylinder case (25),
The side surface of the hydraulic cylinder case (25) have opening outwardly, with the multiple hydraulic cylinder (4) correspondingly it is multiple recessed
Slot (251), the hydraulic cylinder case (25) have top plate and bottom plate, the upper of the groove (251) are made of a part of the top plate
Wall is made of the lower wall of the groove (251) a part of the bottom plate,
The hydraulic cylinder (4) is placed in corresponding groove (251), and the bottom end of the hydraulic cylinder (4) is mounted on the groove
(251) on lower wall, the top of the piston rod (41) of the hydraulic cylinder (4) passes through the company through the setting of the groove (251) upper wall
Fitting is connect with the bottom of the blank holder (21)；
The multiple hydraulic cylinder (4) is located at below the blank holder (21) and along the circumferentially distributed of the blank holder (21)；
It is equipped on the lower die holder (23) one-to-one more through setting, with the multiple hydraulic cylinder (4) along the vertical direction
A mandril (231) is equipped in the bottom of the blank holder (21) and connects with it and correspond with the multiple mandril (231)
Multiple transiting rods (211),
The top of the piston rod (41) of the hydraulic cylinder (4) passes sequentially through the mandril (231), transiting rod (211) and the pressure
Flange (21) connection；
It is equipped with the connector sleeve (42) through its setting on the top plate of the hydraulic cylinder case (25), institute is constituted by the connector sleeve (42)
Connector is stated, the top of the piston rod (41) is connect with the bottom end of mandril (231) by the connector sleeve (42).
2. drawing die according to claim 1, which is characterized in that the top plate of the hydraulic cylinder case (25), which has, to be reinforced
Muscle, the mounting hole (253) to configure the connector sleeve (42) are provided on the reinforcing rib.
3. drawing die according to claim 1, which is characterized in that the upper mold is cavity plate (13), and the lower die is convex
Mould (22).
4. drawing die according to claim 1, which is characterized in that the shape specification of the type chamber and automobile panel is protected
It holds unanimously, to shape the automobile panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610650080.4A CN106111814B (en) | 2016-08-09 | 2016-08-09 | Drawing die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610650080.4A CN106111814B (en) | 2016-08-09 | 2016-08-09 | Drawing die |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106111814A CN106111814A (en) | 2016-11-16 |
| CN106111814B true CN106111814B (en) | 2019-02-01 |
Family
ID=57257617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610650080.4A Expired - Fee Related CN106111814B (en) | 2016-08-09 | 2016-08-09 | Drawing die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106111814B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111203485B (en) * | 2020-02-28 | 2024-07-05 | 深圳新顿科技有限公司 | High-strength aluminum alloy thermoforming drawing feeding control method, blank holder and die |
| CN112338035A (en) * | 2020-10-29 | 2021-02-09 | 燕山大学 | A device and method for hot deep drawing with controllable blank holder force |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3509785A (en) * | 1966-11-04 | 1970-05-05 | Western Electric Co | Methods of deep drawing solid plastic material |
| GB1308641A (en) * | 1970-01-27 | 1973-02-21 | Shoreham Precision Tools Ltd | Presses |
| CN1434282A (en) * | 2003-03-07 | 2003-08-06 | 江苏大学 | Edge pressing force and punching speed changeable single moving sheet hydraulic test machine |
| CN201070654Y (en) * | 2007-08-16 | 2008-06-11 | 浙江科技学院 | Deep-drawing mold based on variable blank holder force |
| CN101530882A (en) * | 2009-04-13 | 2009-09-16 | 重庆工学院 | Mould with alterable brake bead resistance |
| CN102029325A (en) * | 2010-11-18 | 2011-04-27 | 江苏大学 | Drawing mold with variable blank holder force with hydraulic linkage control by machine |
| CN203649170U (en) * | 2013-11-19 | 2014-06-18 | 浙江吉利汽车研究院有限公司 | Drawing die |
| CN103949522A (en) * | 2014-04-24 | 2014-07-30 | 上海理工大学 | Design method of blank holder and edge pressing device |
| CN203751080U (en) * | 2014-04-08 | 2014-08-06 | 青岛金黄海集装箱有限公司 | Hydraulic machine for improving blank holding force |
| CN206083602U (en) * | 2016-08-09 | 2017-04-12 | 机械科学研究总院 | Drawing mold |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006272456A (en) * | 2005-03-30 | 2006-10-12 | Hitachi Zosen Fukui Corp | Die cushion device |
| EP2682200B1 (en) * | 2011-02-28 | 2021-07-21 | H-One Co., Ltd. | Load applying device, press-molding die, press-molding method |
-
2016
- 2016-08-09 CN CN201610650080.4A patent/CN106111814B/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3509785A (en) * | 1966-11-04 | 1970-05-05 | Western Electric Co | Methods of deep drawing solid plastic material |
| GB1308641A (en) * | 1970-01-27 | 1973-02-21 | Shoreham Precision Tools Ltd | Presses |
| CN1434282A (en) * | 2003-03-07 | 2003-08-06 | 江苏大学 | Edge pressing force and punching speed changeable single moving sheet hydraulic test machine |
| CN201070654Y (en) * | 2007-08-16 | 2008-06-11 | 浙江科技学院 | Deep-drawing mold based on variable blank holder force |
| CN101530882A (en) * | 2009-04-13 | 2009-09-16 | 重庆工学院 | Mould with alterable brake bead resistance |
| CN102029325A (en) * | 2010-11-18 | 2011-04-27 | 江苏大学 | Drawing mold with variable blank holder force with hydraulic linkage control by machine |
| CN203649170U (en) * | 2013-11-19 | 2014-06-18 | 浙江吉利汽车研究院有限公司 | Drawing die |
| CN203751080U (en) * | 2014-04-08 | 2014-08-06 | 青岛金黄海集装箱有限公司 | Hydraulic machine for improving blank holding force |
| CN103949522A (en) * | 2014-04-24 | 2014-07-30 | 上海理工大学 | Design method of blank holder and edge pressing device |
| CN206083602U (en) * | 2016-08-09 | 2017-04-12 | 机械科学研究总院 | Drawing mold |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106111814A (en) | 2016-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0677785B2 (en) | Cold hydraulic forming press | |
| CN106111814B (en) | Drawing die | |
| CN103386488A (en) | Mandril adjusting device for shaping die set of powder sintering part | |
| CN104759536A (en) | Adjustable mechanical bending die | |
| CN206083602U (en) | Drawing mold | |
| CN207823729U (en) | Side flanging jig | |
| CN206186214U (en) | Hydraulic press with a collection die sinking, compress tightly, device that three functions of leveling are integrative | |
| JP6536480B2 (en) | Blanking machine | |
| CN204486592U (en) | Refrigerator backboard stamping-out flanging die | |
| CN204018482U (en) | A kind of punch press servicing unit | |
| CN106180338A (en) | A kind of have the two multifunction hydraulic stamping system to auxiliary power and usings method | |
| CN102248069A (en) | Incremental forming, processing and compressing device for metal sheet | |
| CN205668028U (en) | Two-pass primary and secondary wedge | |
| CN205599770U (en) | Fixed bolster forming die | |
| CN214161130U (en) | Leveling die for end face of part with taper in high-precision die | |
| CN215090170U (en) | On-vehicle anti-reflection high printing opacity film processing is with five metals stamping forming mould | |
| CN205362342U (en) | A blank holder device for metal forming | |
| CN105344838B (en) | Double blank holder backhaul auxiliary bodies inside and outside one kind | |
| CN109622709A (en) | Sheet metal bulge molding machine | |
| CN203778767U (en) | Adjustable powder forming machine | |
| JPS60190327A (en) | Draw molding method and device therefor | |
| CN211660826U (en) | Lead forming device | |
| CN203124737U (en) | Female die floating device for powder sintering part shaping machine | |
| CN106975692B (en) | A kind of automobile body-in-white blanking apparatus | |
| CN206215762U (en) | Notebook circuit board apparatus for shaping |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190201 Termination date: 20200809 |