CN105149444B - Die for continuously stamping U-shaped rolled cylinders and provided with suspended mandrel - Google Patents
Die for continuously stamping U-shaped rolled cylinders and provided with suspended mandrel Download PDFInfo
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- CN105149444B CN105149444B CN201510515357.8A CN201510515357A CN105149444B CN 105149444 B CN105149444 B CN 105149444B CN 201510515357 A CN201510515357 A CN 201510515357A CN 105149444 B CN105149444 B CN 105149444B
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Abstract
The invention relates to a die for stamping U-shaped rolled cylinders, in particular to a die for continuously stamping the U-shaped rolled cylinders and provided with a suspended mandrel. The problem that in an existing non-die producing and processing manner, the dimensional accuracy and batch production of cylindrical parts cannot be achieved is solved. A U-shaped stamping lower die body is arranged on a lower die base, and a semi-round rolled cylinder lower die body is arranged on the lower die base and on the right side of the U-shaped stamping lower die body. A locating plate is arranged on the outer side wall of the U-shaped stamping lower die body. A U-shaped stamping upper die body is connected with the lower end face of an upper die base. A round rolling upper die body is connected with the lower end face of the upper die base. A guide rail and a guide rail base are sequentially connected to the left end face of the round rolling upper die body from left to right. A sliding block is arranged in the guide rail and the guide rail base in a sliding manner. A connecting shaft is horizontally arranged on the suspended mandrel in a penetrating manner and connected with the lower end of the sliding block, and the suspended mandrel vertically moves along with the sliding block. The die is used for manufacturing of U-shaped and rolled cylindrical parts.
Description
Technical field
The present invention relates to a kind of mould of punching press U-shaped edge rolling cylinder, and in particular to a kind of floated core continuous punching U-shaped volume
The mould of cylinder.
Background technology
Punching press is a kind of process of machining, is to use forcing press to pressurize to metal blank by mould so as to
Produce plastic deformation, so as to obtain definite shape, size and the part of performance, it be processing method important in machine-building it
One.The part category produced using process for stamping is a lot, and its manufacturing process is also varied, by forming process species, summarizes
To be divided to two big class, one is separation circuit, and two is forming process.Forming process referred under conditions of material is not destroyed, and makes material
It is plastically deformed, so as to obtain the product of required form and size.Bending operation is one kind of shaping, and the form of bool has
It is various, wherein the bending of 〇 shapes be the bending of cylindrical part be curve form one kind.A kind of common part of cylindrical component, production
It is larger in batches, drum and dimension precision requirement it is higher, and current non-mould production and processing mode exists and cannot meet chi
Very little precision and the problem produced in batches.
The content of the invention
Cannot meet cylindrical component chi the invention aims to solve existing non-mould production and processing mode and exist
Very little precision with batch production and can continuity operation problem.And then a kind of floated core continuous punching U-shaped edge rolling cylinder is provided
Mould.
The technical scheme is that：A kind of mould of floated core continuous punching U-shaped edge rolling cylinder includes upper die component
And lower mold assemblies,
Lower mold assemblies include under die shoe, pressure U-shaped mould under mould, multiple lower mould bolts, location-plate, semicircle reel, multiple
Lower mould hangs mould post and multiple lower mould screws, and mould is arranged on die shoe, under semicircle reel by multiple lower mould screws under pressure U-shaped
Mould is arranged on die shoe by multiple lower mould screws, and mould is located at the right side of mould under pressure U-shaped under semicircle reel, and location-plate leads to
Cross multiple lower mould bolts to be arranged under pressure U-shaped on the lateral wall of mould, multiple lower moulds are hung mould post and are symmetrically connected to by itself screw thread
On former and later two end faces of die shoe,
Upper die component includes that mould, upper bolster, multiple upper moulds hang mould post, multiple upper mould screws, multiple bolts, pad on pressure U-shaped
Mould, guiderail base, floating core die, connecting shaft, back-up ring and multiple nuts in circle, guide rail, slide block, edge rolling, mould is by more on pressure U-shaped
Individual upper mould screw is connected with the lower surface of upper bolster, presses mould on U-shaped to be located at the surface of mould under pressure U-shaped, and multiple upper moulds hang mould post
It is symmetrically connected on former and later two end faces of upper bolster by itself screw thread, mould is by multiple upper mould screws and upper bolster in edge rolling
Lower surface connection, and mould is located at the right side of mould on pressure U-shaped in edge rolling, and mould is located at just going up for mould under semicircle reel in edge rolling
Side, guide rail and guiderail base pass sequentially through from left to right it is multiple be bolted in edge rolling on the left side of mould, multiple bolts with
Packing ring is provided between guide rail, slide block can be slidably mounted in guide rail and guiderail base, connecting shaft level is located on floating core die
And be connected with the lower end of slide block, and be fixedly connected by back-up ring and multiple nuts between connecting shaft and floating core die, floating core die
Move up and down with slide block,
During matched moulds, mould is extend under pressure U-shaped in the U-lag of mould on the pressure U-shaped of upper die component, mould in the edge rolling of upper die component
Withhold in the upper end of lower mold assemblies.
The present invention has the effect that compared with prior art：
The floated core pressure U-shaped edge rolling cylinder progressive die of the present invention, is the continuous mould for pressing U-shaped and edge rolling two procedures,
Pressure two kinds of process moulds of U-shaped and edge rolling are installed on same upper and lower die holder, are pumped using friction press, drive
Upper die component moves up and down, and once up and down reciprocatingly completes in stroke to be pressed into U-shaped and is rolling cylinder two procedures.Compacting U-shaped
It is with cylinder pressing process is rolled：Every time during compacting, initial workpiece needs first to suppress after a U-shaped workpiece, could realize being pressed into U-shaped
With roll cylinder two procedures while carrying out.By processing cylindrical component using mould, rapidly sheet material can be rolled into
Cylinder, the time for often making a cylindrical component was down to 5 minutes by original 30 minutes, and production efficiency improves 6 times, then will pressure
U-shaped processed and roll cylinder two procedures and be combined with each other, on the basis of using mould production efficiency, production efficiency is made again than single
The production efficiency of operation pressure-shaped mould is doubled again, and is not only able to ensure dimensional accuracy, additionally it is possible to carry out high-volume raw
Produce.
Description of the drawings
Fig. 1 is general assembly drawing front view of the present invention；Fig. 2 is Fig. 1 left views；Fig. 3 is Fig. 1 right views；Fig. 4 is Fig. 1 in A-A
The sectional view at place；Fig. 5 is that Fig. 1 removes upper die component top view；Fig. 6 is lower mold assemblies front view；Fig. 7 is Fig. 6 left views；Fig. 8
It is Fig. 6 right views；Fig. 9 is upper die component front view；Figure 10 is Fig. 9 left views；Figure 11 is Fig. 9 right views；Figure 12 is that Fig. 9 exists
Sectional view at B-B；Figure 13 is sectional views of the Figure 12 at C-C；Figure 14 is the front view of cylindrical workpieces；Figure 15 is Figure 14
Top view.
Specific embodiment
Specific embodiment one：Present embodiment is illustrated with reference to Fig. 1 to Figure 13, present embodiment includes upper die component with
Membrane module,
Lower mold assemblies include mould 1-2, multiple lower mould bolt 1-3, location-plate 1-4, semicircle volume under die shoe 1-1, pressure U-shaped
The lower mould 1-5 of cylinder, multiple lower moulds hang mould post 1-6 and multiple lower mould screw 1-7, and mould 1-2 passes through multiple lower mould screw 1-7 under pressure U-shaped
On die shoe 1-1, mould 1-5 is arranged on die shoe 1-1 by multiple lower mould screw 1-7 under semicircle reel, and half
Mould 1-5 is located at the right side of mould 1-2 under pressure U-shaped under circular reel, and location-plate 1-4 is arranged on pressure U-shaped by multiple lower mould bolt 1-3
On the lateral wall of lower mould 1-2, multiple lower moulds hang mould post 1-6 by itself screw thread be symmetrically connected to die shoe 1-1 former and later two
On end face,
Upper die component include mould 2-1 on pressure U-shaped, upper bolster 2-2, multiple upper moulds hang mould post 2-3, multiple upper mould screw 2-4,
Mould 2-9, guiderail base 2-10, floating core die 2-11, company in multiple bolt 2-5, packing ring 2-6, guide rail 2-7, slide block 2-8, edge rolling
Spindle 2-12, back-up ring 2-13 and multiple nut 2-14, press mould 2-1 on U-shaped to pass through multiple upper mould screw 2-4 and upper bolster 2-2's
Lower surface connects, and presses mould 2-1 on U-shaped to be located at the surface of mould 1-2 under pressure U-shaped, and multiple upper moulds hang mould post 2-3 by itself screw thread
It is symmetrically connected on former and later two end faces of upper bolster 2-2, mould 2-9 is by multiple upper mould screw 2-4 and upper bolster 2-2 in edge rolling
Lower surface connection, and mould 2-9 is located at the right side of mould 2-1 on pressure U-shaped in edge rolling, and mould 2-9 is located under semicircle reel in edge rolling
The surface of mould 1-5, guide rail 2-7 and guiderail base 2-10 pass sequentially through from left to right multiple bolt 2-5 and are connected to mould in edge rolling
On the left side of 2-9, packing ring 2-6 is provided between multiple bolt 2-5 and guide rail 2-7, slide block 2-8 can be slidably mounted at guide rail 2-7
In guiderail base 2-10, connecting shaft 2-12 level is located on floating core die 2-11 and is connected with the lower end of slide block 2-8, and even
It is fixedly connected by back-up ring 2-13 and multiple nut 2-14 between spindle 2-12 and floating core die 2-11, floating core die 2-11 is with cunning
Block 2-8 moves up and down,
During matched moulds, mould 2-1 is extend under pressure U-shaped in the U-lag of mould 1-2 on the pressure U-shaped of upper die component, the volume of upper die component
Mould 2-9 is withheld in the upper end of lower mold assemblies on circle.
The floated core pressure U-shaped edge rolling cylinder progressive die of present embodiment, the application is pressure U-shaped and edge rolling two procedures group
Into the progressive die, first elongate steel plate is pressed into into U-shaped, then roll into cylinder, pressing process is：Every time during compacting, initial workpiece is needed
After first suppressing a U-shaped workpiece, could realize being pressed into U-shaped and roll cylinder two procedures while carrying out.This mould is existed
After installing on equipment, the elongate steel plate sheared in advance is placed under pressure U-shaped on mould 1-2 and location-plate 1-4, startup sets
Standby, equipment top shoe drives upper die component descending, and mould 2-1 is pressed into steel plate under U-shaped in mould 1-2 half slots, by length on pressure U-shaped
Bar steel plate is pressed into U-shaped, and control device slide block is returned up, and will be pressed into U-shaped workpiece and takes out in mould 1-2 under pressure U-shaped, will
It is placed under semicircle edge rolling in mould 1-5, again the elongate steel plate sheared in advance is placed on into mould 1-2 under pressure U-shaped
On location-plate 1-4, starting device, equipment top shoe drives upper die component descending, and steel plate is pressed into pressure U-shaped by mould 2-1 on pressure U-shaped
In lower mould 1-2 half slots, elongate steel plate is pressed into into U-shaped；Mould 2-9 and floating core die 2-11 collective effects are by U-shaped in edge rolling
Part is pressed into cylinder, and control device slide block is returned up, and floating core die 2-11 upwards takes up the cylindrical workpieces being pressed into, while
Floating core die 2-11 is together moved downward with slide block 2-8 along guide rail 2-7, floating core die 2-11 gradually with mould 2-9 in edge rolling
Disengage, after equipment slide block stop motion, compressing cylinder is extracted out from floating core die 2-11, complete a compacting circulation.
The guide rail 2-7 of present embodiment is provided with gag lever post 2-7-1, is fluctuated to gag lever post 2- by connecting shaft 2-12
Space at 7-1 ensures the compacting quality and precision of cylindrical component ensureing the floating distance of floating core die 2-11.
The guide rail 2-7 and guiderail base 2-10 of present embodiment passes sequentially through from left to right multiple bolt 2-5 and is connected to volume
On circle on the left side of mould 2-9, avoided with this dry with mould 1-5 generations under semicircle reel during compacting cylindrical component
Relate to, affect the compacting of part.
The slide block 2-8 of present embodiment is the slide block of " 7 " font, and during slide block slide downward, horizontal segment can
It is installed on gag lever post 2-7-1, is that moving down for slide block provides necessary position-limiting action, band of the anti-limited slip block in floating core die 2-11
Dynamic lower directly landing, it is ensured that the quality and continuous operation property of mould.
Specific embodiment two：Present embodiment, pressure U of present embodiment are illustrated with reference to Fig. 1, Fig. 2, Fig. 5, Fig. 6 and Fig. 7
Mould 1-2 is the rectangular module that half slot is provided with module upper level direction under shape.It is arranged such, is easy to be pressed into U-shaped circle
Barrier part.Other compositions and annexation are identical with specific embodiment one.
Specific embodiment three：With reference to Fig. 2 and Figure 11 explanation present embodiments, mould 2-1 bags on the pressure U-shaped of present embodiment
/ 2nd cylinder 2-1-1, connecting plate 2-1-2 and fixed plate 2-1-3 are included, fixed plate 2-1-3 is arranged on upper bolster 2-2,
Connecting plate 2-1-2 and fixed plate 2-1-3 be from top to bottom fixedly mounted on successively the lower end of fixed plate 2-1-3 and with fixed plate 2-1-
3 are formed integrally.It is arranged such, enough placement spaces, 1/2nd circles can be provided for U-shaped cylindrical element at connecting plate 2-1-2
Cylinder 2-1-1 is easy to suppress U-shaped cylindrical element.Other compositions and annexation are identical with specific embodiment two.
Specific embodiment four：Present embodiment, present embodiment are illustrated with reference to Fig. 1, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 8
Semicircle reel under mould 1-5 be the rectangular module that interior concave arc is provided with module upper level direction, and in the rectangular mold
Two angles are cut away respectively in the rear and front end of block.It is arranged such, is easy to be engaged with the madial wall of mould 2-9 in edge rolling, while ensures
The integrality of cylindrical component compacting.Other compositions and annexation are identical with specific embodiment three.
Specific embodiment five：Present embodiment, the edge rolling of present embodiment are illustrated with reference to Fig. 1 to Fig. 4, Figure 10 to Figure 14
Upper mould 2-9 is to open up the cumulative inverted U-shaped groove rectangular module of bore, the inverted U-shaped groove and semicircle reel in module bottom
The two angle outer walls cut away on lower mould 1-5 fit.It is arranged such, is easy to be engaged with mould 1-5 under semicircle reel.Other groups
Into identical with specific embodiment one, two, three or four with annexation.
Specific embodiment six：Present embodiment is illustrated with reference to Fig. 1, Fig. 3, Fig. 4, Figure 10 and Figure 11, present embodiment
Floating core die 2-11 is cylindrical floating core die.It is arranged such, is easy to for the cylindrical component for having made U-shaped to be pressed into cylinder
Shape.Other compositions and annexation are identical with specific embodiment one, two, three, four or five.
Specific embodiment seven：This enforcement is illustrated with reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 8, Figure 11, Figure 12 and Figure 13
Mode, the multiple lower mould of present embodiment hangs mould post 1-6 and multiple upper moulds hang the quantity of mould post 2-3 and are 4.It is arranged such,
It is easy to ensure handling this mould of safety and steady.Other compositions and annexation and specific embodiment one, two, three, four, five or
Six is identical.
Illustrate that the operation principle of the present invention is with reference to Fig. 1 to Figure 15：
Using the plasticity of metal, permanent deformation is produced in the presence of external force, so as to obtain the zero of definite shape and size
Part.This patent is pumped using friction press, drives upper die component to move up and down, once up and down reciprocatingly in stroke
Complete to be pressed into U-shaped and roll cylinder two procedures.Suppressing U-shaped and rolling cylinder pressing process is：Every time during compacting, initial workpiece is needed
After first suppressing a U-shaped workpiece, could realize being pressed into U-shaped and roll cylinder two procedures while carrying out.This mould is existed
After installing on equipment, the elongate steel plate sheared in advance is placed under pressure U-shaped on mould 1-2 and location-plate 1-4, startup sets
Standby, equipment top shoe drives upper die component descending, and mould 2-1 is pressed into steel plate under U-shaped in mould 1-2 half slots, by length on pressure U-shaped
Bar steel plate is pressed into U-shaped, and control device slide block is returned up, and will be pressed into U-shaped workpiece and takes out in mould 1-2 under pressure U-shaped, will
It is placed under semicircle edge rolling in mould 1-5, again the elongate steel plate sheared in advance is placed on into mould 1-2 under pressure U-shaped
On location-plate 1-4, starting device, equipment top shoe drives upper die component descending, and steel plate is pressed into pressure U-shaped by mould 2-1 on pressure U-shaped
In lower mould 1-2 half slots, elongate steel plate is pressed into into U-shaped；Mould 2-9 and floating core die 2-11 collective effects are by U-shaped in edge rolling
Part is pressed into cylinder, and control device slide block is returned up, and floating core die 2-11 upwards takes up the cylindrical workpieces being pressed into, slide block
2-8 can be slided up and down in guide rail 2-7, during upper die component is moved upwards with equipment slide block, floating core die 2-
11 together move downward with slide block 2-8 along guide rail 2-7, and floating core die 2-11 is gradually disengaged with mould 2-9 in edge rolling, and equipment is slided
After block stop motion, compressing cylinder is extracted out from floating core die 2-11, complete a compacting circulation, suppressed later with this
Analogize, move in circles.
Claims (7)
1. a kind of mould of floated core continuous punching U-shaped edge rolling cylinder, it is characterised in that：It includes upper die component and lower module
Part,
Lower mold assemblies include mould (1-2), multiple lower mould bolts (1-3), location-plate (1-4), semicircle under die shoe (1-1), pressure U-shaped
Mould (1-5), multiple lower moulds hang mould post (1-6) and multiple lower mould screws (1-7) under shape reel, and mould (1-2) is by multiple under pressure U-shaped
Lower mould screw (1-7) is arranged on die shoe (1-1), and mould (1-5) is installed by multiple lower mould screws (1-7) under semicircle reel
On die shoe (1-1), and mould (1-5) is located at the right side of mould (1-2) under pressure U-shaped under semicircle reel, and location-plate (1-4) passes through
Multiple lower mould bolts (1-3) are arranged under pressure U-shaped on the lateral wall of mould (1-2), and multiple lower moulds hang mould post (1-6) by itself spiral shell
Line is symmetrically connected on former and later two end faces of die shoe (1-1),
Upper die component includes that mould (2-1), upper bolster (2-2), multiple upper moulds hang mould post (2-3), multiple upper mould screws on pressure U-shaped
(2-4), multiple bolts (2-5), packing ring (2-6), guide rail (2-7), slide block (2-8), mould (2-9), guiderail base (2- in edge rolling
10), floating core die (2-11), connecting shaft (2-12), back-up ring (2-13) and multiple nuts (2-14), mould (2-1) passes through on pressure U-shaped
Multiple upper mould screws (2-4) are connected with the lower surface of upper bolster (2-2), press mould (2-1) on U-shaped to be located at mould (1-2) under pressure U-shaped
Surface, multiple upper moulds are hung mould post (2-3) and are symmetrically connected on former and later two end faces of upper bolster (2-2) by itself screw thread,
Mould (2-9) is connected by multiple upper mould screws (2-4) with the lower surface of upper bolster (2-2) in edge rolling, and mould (2-9) position in edge rolling
The right side of mould (2-1) on pressure U-shaped, mould (2-9) is located at the surface of mould (1-5) under semicircle reel, guide rail (2-7) in edge rolling
Multiple bolts (2-5) are passed sequentially through from left to right with guiderail base (2-10) to be connected on the left side of mould in edge rolling (2-9), it is many
Packing ring (2-6) is provided between individual bolt (2-5) and guide rail (2-7), slide block (2-8) can be slidably mounted at guide rail (2-7) and guide rail
In base (2-10), connecting shaft (2-12) level is located on floating core die (2-11) and is connected with the lower end of slide block (2-8), and
It is fixedly connected by back-up ring (2-13) and multiple nuts (2-14) between connecting shaft (2-12) and floating core die (2-11), floating core
Mould (2-11) moves up and down with slide block (2-8), and slide block (2-8) is the slide block of " 7 " font；
During matched moulds, mould (2-1) is extend under pressure U-shaped in the U-lag of mould (1-2) on the pressure U-shaped of upper die component, the volume of upper die component
Mould (2-9) is withheld in the upper end of lower mold assemblies on circle.
2. the mould of a kind of floated core continuous punching U-shaped edge rolling cylinder according to claim 1, it is characterised in that：Pressure U
Mould (1-2) is the rectangular module that half slot is provided with module upper level direction under shape.
3. the mould of a kind of floated core continuous punching U-shaped edge rolling cylinder according to claim 2, it is characterised in that：Pressure U
Mould (2-1) includes 1/2nd cylinders (2-1-1), connecting plate (2-1-2) and fixed plate (2-1-3), fixed plate (2-1- in shape
3) on upper bolster (2-2), connecting plate (2-1-2) and fixed plate (2-1-3) are from top to bottom fixedly mounted on successively fixation
The lower end of plate (2-1-3) is simultaneously formed integrally with fixed plate (2-1-3).
4. the mould of a kind of floated core continuous punching U-shaped edge rolling cylinder according to claim 3, it is characterised in that：Half
Mould (1-5) is the rectangular module that interior concave arc is provided with module upper level direction under circular reel, and in the rectangular module
Rear and front end cut away two angles respectively.
5. the mould of a kind of floated core continuous punching U-shaped edge rolling cylinder according to claim 4, it is characterised in that：Volume
Mould (2-9) is to open up the cumulative inverted U-shaped groove rectangular module of bore, the inverted U-shaped groove and semicircle in module bottom on circle
The two angle outer walls cut away on mould (1-5) under reel fit.
6. a kind of mould of floated core continuous punching U-shaped edge rolling cylinder according to claim 1 or 5, it is characterised in that：
Floating core die (2-11) is cylindrical floating core die.
7. the mould of a kind of floated core continuous punching U-shaped edge rolling cylinder according to claim 1, it is characterised in that：It is many
Individual lower mould hangs mould post (1-6) and multiple upper moulds hang the quantity of mould post (2-3) and are 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510515357.8A CN105149444B (en) | 2015-08-21 | 2015-08-21 | Die for continuously stamping U-shaped rolled cylinders and provided with suspended mandrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510515357.8A CN105149444B (en) | 2015-08-21 | 2015-08-21 | Die for continuously stamping U-shaped rolled cylinders and provided with suspended mandrel |
Publications (2)
| Publication Number | Publication Date |
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| CN105149444A CN105149444A (en) | 2015-12-16 |
| CN105149444B true CN105149444B (en) | 2017-05-10 |
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| CN201510515357.8A Active CN105149444B (en) | 2015-08-21 | 2015-08-21 | Die for continuously stamping U-shaped rolled cylinders and provided with suspended mandrel |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106180403B (en) * | 2016-07-29 | 2018-07-17 | 成都宏明双新科技股份有限公司 | A kind of float mould core Clincher and method of bending |
| CN108500136B (en) * | 2018-04-23 | 2023-04-14 | 昆山捷胜精密电子有限公司 | Preforming mold of clamping piece and forming process of clamping piece |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS62142026A (en) * | 1985-12-16 | 1987-06-25 | Kawasaki Steel Corp | Tubular body forming machine |
| CN2476360Y (en) * | 2001-02-27 | 2002-02-13 | 番禺珠江钢管有限公司 | Make-up machine |
| CN1784289A (en) * | 2003-05-08 | 2006-06-07 | 普罗托特优伯股份有限公司 | Process for press forming metal tubes |
| CN2754767Y (en) * | 2004-12-07 | 2006-02-01 | 嘉善长盛滑动轴承有限公司 | Four position punching mould |
| CN2792641Y (en) * | 2005-06-02 | 2006-07-05 | 南京工业职业技术学院 | Mould with float mould core structure |
| DE102010037534A1 (en) * | 2010-09-14 | 2012-03-15 | Thyssenkrupp Steel Europe Ag | Apparatus and method for producing at least partially closed hollow profiles with rotatable die halves and low cycle time |
| CN103600006B (en) * | 2013-11-25 | 2016-04-20 | 天津津荣天宇精密机械股份有限公司 | Automobile volume circle part forming methods |
| CN204470388U (en) * | 2015-02-03 | 2015-07-15 | 北京绿创环保设备股份有限公司 | A kind of pipe punching hole mould |
| CN204817733U (en) * | 2015-08-21 | 2015-12-02 | 哈尔滨建成集团有限公司 | Mould of continuous punching press U -shaped edge rolling section of thick bamboo of floated mandrel |
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