CN106345867A - Punch forming machine for elbows made from pipes - Google Patents
Punch forming machine for elbows made from pipes Download PDFInfo
- Publication number
- CN106345867A CN106345867A CN201610769387.6A CN201610769387A CN106345867A CN 106345867 A CN106345867 A CN 106345867A CN 201610769387 A CN201610769387 A CN 201610769387A CN 106345867 A CN106345867 A CN 106345867A
- Authority
- CN
- China
- Prior art keywords
- mold core
- module
- support bar
- forming machine
- pipeline
- 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.)
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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
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/06—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies
-
- 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
Abstract
The invention relates to a punch forming machine for elbows made from pipes. The punch forming machine comprises a mount support, an external die and an internal core. The external die comprises a supporting block, a first upper die block, a second upper die block, a first lower die block, a second lower die block and a base; the internal core comprises an upper core, a lower core, a first supporting rod and a second supporting rod; the first upper die block, the second upper die block, the first lower die block, the second lower die block, the first supporting rod and the second supporting rod are synchronous in rotation so as to realize bending of pipes. After finishing machining, the first supporting rod and the second supporting rod release from the pipes under driving of a hydraulic rod, the upper core and the lower core are also released, and the whole machining process is completed automatically.
Description
Technical field
The present invention relates to a kind of control elbow-punching forming machine.
Background technology
Of the prior art for control elbow-punching forming machine, generally comprise mounting bracket, cast outer mold structure and inner core die
Tool, external mold generally comprises upper die and lower die, the bottom surface camber of upper mould and have semicircle concave inward structure, and lower mould has and upper mould
Arc that bottom surface is adapted and have semicircle concave inward structure, the cast outer mold structure design of this control elbow is so that elbow
In the radian of upper and lower mould, meanwhile, Internal core mould typically becomes separation design to punching press limited angle, and Internal core mould, in processing, is put
Enter pipeline or take out from pipeline to be all inconvenient, strong influence production efficiency, due to the knot of external mold and Internal core mould
Structure design is unreasonable, can cause the irregular phenomenon of pipeline outer peripheral face local punching press.
Content of the invention
In view of the shortcomings of the prior art, it is an object of the invention to provide a kind of good forming effect, processing technique letter
Just, flexibly, the control elbow-punching forming machine of high degree of automation.
For achieving the above object, the technical scheme is that this control elbow-punching forming machine, including installing
Support, cast outer mold structure, Internal core mould and the first hydraulic press, described mounting bracket includes upper mounted plate, fixing pole and lower fixation
Plate, described first hydraulic press is arranged in upper mounted plate, and described cast outer mold structure includes support block, the first upper module, mould on second
Block, the first lower module, the second lower module and base, described support block becomes cylinder, and the first hydraulic press is connected with support block, drives
Support block oscilaltion, described first upper module and the second upper module are connected with support block by connection sheet respectively and are placed in supporting
The both sides of block, the bottom of described first upper module and the second upper module is semi-circular recesses, the first upper module and the second upper module
When pipeline is processed, the cross-section center point with support block rotates for the center of circle, described first lower module and second time mould
Block is arranged on base, described first lower module and the second lower module junction with base with it respectively when pipeline is processed
Rotate for the center of circle, it is cavity that base is located at the first lower module and the lower section of the second lower module, and base is located at bottom plate
On, the surface of the first lower module and the second lower module is semi-circular recesses, and the first lower module and the second lower module are located in base
The end face in portion abuts and becomes the cambered surface being mutually adapted.Before processing, pipeline is placed in the first lower module and the second lower module
Semi-circular recesses in, because the end face that the first lower module and the second lower module are located in the middle part of base abuts and becomes mutually suitable
The cambered surface joined, the first lower module and the second lower module abuts so that pipeline is horizontal, Internal core mould is in hydraulic stem
Drive under enter processed pipeline, then start processing, support block drive under the first hydraulic press act on the first upper module with
Second upper module declines towards pipeline, and the bottom of the first upper module and the second upper module and pipeline fit, and pipeline is integrally wrapped
Be trapped among the first upper module, the second upper module and the first lower module, among the second lower module, in the effect further of the first hydraulic press
Under, the first upper module and the second upper module are rotated with the cross-section center point of support block for the center of circle, meanwhile, first time mould
Block and the second lower module respectively junction with base with it rotate for the center of circle so that the top of pipeline with bottom simultaneously
It is bent, because the end face that the first lower module and the second lower module are located in the middle part of base becomes the cambered surface being mutually adapted respectively, first
Lower module and the second lower module can be held against during pipe bending, realize the rule bending of pipeline.
By adopting technique scheme, due to the first upper module, the second upper module and the first lower module, the first lower module
Can cooperate does circumferential movement so that the angle of pipe bending is easy to control, flexible operation, and can guarantee that flexure plane
Rule shapes.
The present invention is arranged further: also include the second hydraulic press and the 3rd hydraulic press, described Internal core mould include upper mold core,
Lower mold core, first support bar and second support bar, described second hydraulic press is connected with first support bar, described 3rd hydraulic press with
Second support bar be connected, this Internal core mould can move along processed pipeline, and upper mold core is resisted against in lower mold core, first support bar and
Upper mold core is connected, and first support bar is rotated for the center of circle with the connecting place of upper mold core with it when pipeline is processed, and second
Support bar is connected with lower mold core, and second support bar does circumference turn with the connecting place of lower mold core for the center of circle with it when pipeline is processed
Dynamic, the bottom surface of lower mold core is adapted with the shape of the inner-walls of duct after processing, and Internal core mould enters processed pipeline, upper mold core with
When lower mold core abuts, bottom center's line of lower mold core and the both ends of the surface of the first lower module and the second lower module are against formed
Face is at grade.Before processing, pipeline is placed in the first lower module and the semi-circular recesses of the second lower module, due to
The end face that one lower module and the second lower module are located in the middle part of base abuts and becomes the cambered surface being mutually adapted, the first lower module and
Second lower module abuts so that pipeline is horizontal, Internal core mould second and the 3rd hydraulic stem drive under enter
Enter processed pipeline, when upper mold core and lower mold core abut, under bottom center's line and the first lower module and second of lower mold core
The both ends of the surface of module against formed face at grade, then start processing, support block is in the presence of the first hydraulic press
The first upper module and the second upper module is driven to decline towards pipeline, the bottom of the first upper module and the second upper module and pipeline are affixed
Close, pipeline is integrally enclosed in the first upper module, the second upper module and the first lower module, among the second lower module, in the first liquid
Under the effect further of press, the first upper module and the second upper module do circumference with the cross-section center point of support block for the center of circle and turn
Dynamic, meanwhile, junction with base with it rotates so that pipeline for the center of circle respectively for the first lower module and the second lower module
Top be bent with bottom, because the end face that the first lower module and the second lower module are located in the middle part of base becomes mutual respectively simultaneously
The cambered surface of adaptation, the first lower module and the second lower module can be held against during pipe bending, further, since Internal core mould
First support bar when pipeline is processed, with it, the central point of the connecting place activity bolt with upper mold core rotates for the center of circle,
Second support bar is rotated for the center of circle with the central point of the connecting place activity bolt of lower mold core with it when pipeline is processed, on
Core rod and lower mold core abut and maintain static, that is, pipeline is stamped in BENDING PROCESS, the first upper module, the second upper module,
One lower module, the rotation of the second lower module, first support bar and second support bar keep synchronous, jointly realize the well curved of pipeline
Bent.After pipe bending machines, first support bar and second support bar are respectively in the second hydraulic press and the 3rd hydraulic press
Drive lower disengaging pipeline, because upper mold core is connected with first support bar and second support bar respectively with lower mold core, upper mold core with
Core rod is also departed from simultaneously, and whole process all completes in an automated manner.
By adopting technique scheme, the first upper module, the second upper module, the first lower module, the second lower module, first
The rotation of support bar and second support bar keeps synchronous, jointly realizes the good bending of pipeline, shapes rule, simultaneously upper mold core and
Lower mold core simultaneously enters or departs from together with first support bar and second support bar pipeline respectively, and operation is simple, high degree of automation,
Therefore, the Internal core mould of this kind of control elbow punching press has the advantages that easy and simple to handle, stable and shapes rule.
The present invention is arranged further: also include drop front and limited block, described drop front be arranged on upper mounted plate and
Between support block, drop front is connected with the first hydraulic press, drives drop front lifting by the first hydraulic press, and support block connects
In the lower section of drop front, support block lifting is driven by drop front, because limited block is arranged on fixing pole, works as active face
When plate moves to the position of limited block, trigger limit function, the first hydraulic press stops pressure.
By adopting technique scheme, when drop front drops to certain distance, touch limited block, triggering
Limit function, the first hydraulic press stops pressure, can guarantee that the bending of pipeline controls in rational scope.
The present invention is arranged further: the side of described support block is arc concave shape, mould on described first upper module and second
The side that block is connected with support block is arc evagination, and described arc concave shape is adapted with the shape of described arc evagination.
By adopting technique scheme, in processing, the first upper module and the second upper module are with the cross section of support block
Central point rotates for the center of circle, and the structure that arc concave shape is adapted with the shape of described arc evagination can guarantee that and circumferentially rotates
Carry out is more smooth, and the course of processing is more stable.
The present invention is arranged further: is the semicolumn metal derby with inclined-plane on the left of described upper mold core, is gold on the right side of upper mold core
Belong to piece, sheet metal is located at the middle part of metal derby, and the upper end of metal derby flushed with the upper end of sheet metal, metal derby lower end and sheet metal
Lower end forms shoulder rank, sheet metal has through hole, the outside of sheet metal is inclined design, under the outside of sheet metal and sheet metal
Hold transition at a right angle.
By adopting technique scheme, the inclined design on the left of upper mold core can guarantee that second support bar can be more in processing
Good carrying out circumferentially rotates, and metal derby lower end and sheet metal lower end form shoulder rank, can make upper mold core after entering pipeline or
During pipeline processing, can more stable be formed with lower mold core against, sheet metal has through hole can be easy to its with first
The connection of support, the outside of sheet metal is inclined design, the outside of sheet metal and the transition at a right angle of the lower end of sheet metal, can allow first
Support bar before processing can with upper mold core formed against, be maintained on unified direction, due to sheet metal outside be inclined design,
Ensure in processing first support bar with its connecting place with upper mold core for the center of circle rotate more smooth.
The present invention is arranged further: described lower mold core integrally becomes semiellipse shape, and lower mold core bottom surface is ellipse arc, lower mold core
It is square posts on the left of surface, be provided with through hole in lug, lower mold core surface middle part is provided with boss, lower mold core surface middle part boss
And it is respectively provided with groove between on the left of lower mold core surface and on the right side of lower mold core surface.
By adopting technique scheme, lower mold core bottom surface is ellipse arc, can preferably be adapted with the inwall of pipeline,
It is square posts on the left of lower mold core surface, be provided with through hole in lug, the design of through hole can make lower mold core and second support bar
It is easy to connect, before processing, lug can be formed against so that lower mold core is maintained at second support bar with second support bar simultaneously
On unified direction, meanwhile, ensure what the connecting place with it with lower mold core for the second support bar rotated for the center of circle in processing
More smooth.The setting of lower mold core surface middle part boss, before processing or processing when, allow upper mold core and lower mold core against more
Stable.
The present invention is arranged further: one end of described first support bar is provided with connecting hole, and other end top is projection, bottom
Middle part with first support bar is shoulder rank transition, and the middle part of projection is provided with breach, and projection is provided with through hole, described first support bar
Identical with the structure of second support bar.
By adopting technique scheme, first support bar is identical with the structure of second support bar, wherein the setting of connecting hole
Put the connection that first support bar and hydraulic stem can be made stable, the setting of projection and its breach, can guarantee that before processing or add
Man-hour, the connection of support bar and upper mold core or lower mold core, against and relatively rotate etc. and to be all more smoothed out.
The present invention is arranged further: described bottom plate is provided with groove on the direction placed perpendicular to pipeline, described bottom
Seat bottom surface be provided with raised line, the shape of described raised line is adapted with the shape of described groove, described base can on bottom plate edge
Groove direction moves.
By adopting technique scheme, adjust the placement of pipeline by the position of adjusting base it is ensured that elbow is processed
Effect.
The invention will be further described below in conjunction with the accompanying drawings.
Brief description
Fig. 1 is the structure chart of the present invention；
Fig. 2 is the Structure explosion diagram of the present invention；
Fig. 3 is the Structure explosion diagram of the cast outer mold structure of the present invention；
Fig. 4 is the Structure explosion diagram of the Internal core mould of the present invention；
In figure 1- mounting bracket, 11- upper mounted plate, 12- fixation pole, 13- bottom plate, 2- cast outer mold structure, 21- support block,
22- first upper module, 23- second upper module, 24- first lower module, 25- second lower module, 26- base, 27- connection sheet, 3-
Internal core mould, 31- upper mold core, 32- lower mold core, 33- first support bar, 34- second support bar, 4- first hydraulic press, 5- second
Hydraulic press, 6- the 3rd hydraulic press, 7- drop front, 8- limited block.
Specific embodiment
Referring to accompanying drawing 1 to accompanying drawing 4, the present invention discloses a kind of control elbow-punching forming machine, for achieving the above object, this
Bright provide a kind of following technical scheme: control elbow-punching forming machine, including mounting bracket 1, cast outer mold structure 2, Internal core mould 3
With the first hydraulic press 4, described mounting bracket 1 includes upper mounted plate 11, fixing pole 12 and bottom plate 13, described first hydraulic pressure
Machine 4 is arranged in upper mounted plate 11, described cast outer mold structure 2 include support block 21, the first upper module 22, the second upper module 23,
One lower module 24, the second lower module 25 and base 26, described 21 one-tenth cylinders of support block, described first hydraulic press 4 and support block
21 are connected, and described first upper module 22 is connected with support block 21 by connection sheet 27 respectively with the second upper module 23 and is placed in supporting
The both sides of block 21, the bottom of described first upper module 22 and the second upper module 23 is semi-circular recesses, the first upper module 22 and the
Two upper modules 23 are rotated for the center of circle with the cross-section center of support block 21 point when pipeline is processed, described first time mould
Block 24 and the second lower module 25 are installed on base plate 26, and described first lower module 24 and the second lower module 25 are when pipeline is processed
Rotated for the center of circle with it with the junction of base 26 respectively, base 26 is located at the first lower module 24 and the second lower module 25
Lower section be cavity, the surface of the first lower module 24 and the second lower module 25 is semi-circular recesses, the first lower module 24 and second
The end face that lower module 25 is located at base 26 middle part abuts and becomes the cambered surface being mutually adapted.This control elbow-punching forming machine is also
Including the second hydraulic press 5 and the 3rd hydraulic press 6, described Internal core mould 3 includes upper mold core 31, lower mold core 32, first support bar 33
With second support bar 34, described second hydraulic press 5 is connected with first support bar 33, described 3rd hydraulic press 6 and second support bar
34 are connected, and this Internal core mould 3 can move along processed pipeline, and upper mold core 31 is resisted against in lower mold core 32, first support bar 33 and
Upper mold core 31 is connected, and first support bar 33 does circumference turn with the connecting place of upper mold core 31 for the center of circle with it when pipeline is processed
Dynamic, second support bar 34 is connected with lower mold core 32, second support bar 34 being connected with lower mold core 32 with it when pipeline is processed
Locate to rotate for the center of circle, the bottom surface of lower mold core 32 is adapted with the shape of the inner-walls of duct after processing, and Internal core mould 2 enters
When processed pipeline, upper mold core 31 and lower mold core 32 abut, bottom center's line of lower mold core 32 and the first lower module 24 and
The both ends of the surface of the second lower module 25 are against formed face at grade.This control elbow-punching forming machine also includes active face
Plate 7 and limited block 8, described drop front is arranged between upper mounted plate 11 and support block 21, and described limited block 8 is arranged on fixation
On pole 12, described first hydraulic press 4 is connected with described drop front 7 and can drive drop front 7 oscilaltion.Described support
The side of block 21 is arc concave shape, and the side that described first upper module 22 is connected with support block 21 with the second upper module 23 is arc
Shape evagination, described arc concave shape is adapted with the shape of described arc evagination.Described upper mold core 31 left side is the semicircle with inclined-plane
Post metal derby, upper mold core 31 right side is sheet metal, and sheet metal is located at the middle part of metal derby, and the upper end of metal derby is upper with sheet metal
End flushes, and metal derby lower end and sheet metal lower end form shoulder rank, sheet metal have through hole, the outside of sheet metal sets for inclined-plane
Meter, the outside of sheet metal and the transition at a right angle of the lower end of sheet metal.Described lower mold core 32 entirety becomes semiellipse shape, lower mold core 32 bottom
Face is ellipse arc, is square posts, is provided with through hole, lower mold core 32 surface middle part is provided with lug on the left of lower mold core 32 surface
It is respectively provided with groove between on the left of boss, lower mold core 32 surface middle part boss and lower mold core 32 surface and on the right side of lower mold core 32 surface.Institute
The one end stating first support bar 33 is provided with connecting hole, and other end top is projection, and bottom is shoulder with the middle part of first support bar 33
Rank transition, the middle part of projection is provided with breach, and projection is provided with through hole, the structure of described first support bar 33 and second support bar 34
Identical.Described bottom plate 13 is provided with groove on the direction placed perpendicular to pipeline, and described base 26 bottom surface is provided with raised line, institute
The shape stating raised line is adapted with the shape of described groove, and described base 26 can move along groove direction on bottom plate 13.
Claims (10)
1. a kind of control elbow-punching forming machine, including mounting bracket, cast outer mold structure, Internal core mould and the first hydraulic press, described
Mounting bracket includes upper mounted plate, fixing pole and bottom plate, and described first hydraulic press is arranged in upper mounted plate, its feature
It is: described cast outer mold structure includes support block, the first upper module, the second upper module, the first lower module, the second lower module and bottom
Seat, described support block becomes cylinder, and described first hydraulic press is connected with support block, and described first upper module and the second upper module divide
It is not connected with support block by connection sheet and is placed in the both sides of support block, the bottom of described first upper module and the second upper module is
Semi-circular recesses, the first upper module and the second upper module are done for the center of circle with the cross-section center of support block point when pipeline is processed
Circumferentially rotate, described first lower module and the second lower module are arranged on base, described first lower module and the second lower module exist
Rotated for the center of circle with it with the junction of base respectively when pipeline is processed, base is located under the first lower module and second
The lower section of module is cavity, and the surface of the first lower module and the second lower module is semi-circular recesses, under the first lower module and second
The end face that module is located in the middle part of base abuts and becomes the cambered surface being mutually adapted.
2. a kind of control elbow-punching forming machine according to claim 1 it is characterised in that: also include the second hydraulic press and
3rd hydraulic press, described Internal core mould includes upper mold core, lower mold core, first support bar and second support bar, described second hydraulic pressure
Machine is connected with first support bar, and described 3rd hydraulic press is connected with second support bar, and this Internal core mould can move along processed pipeline
Dynamic, upper mold core is resisted against in lower mold core, and first support bar is connected with upper mold core, first support bar when pipeline is processed with itself and
The connecting place of upper mold core rotates for the center of circle, and second support bar is connected with lower mold core, and second support bar is processed in pipeline
Shi Yiqi is rotated for the center of circle with the connecting place of lower mold core, the bottom surface of lower mold core with processing after inner-walls of duct shape phase
Adaptation, Internal core mould enters processed pipeline, when upper mold core and lower mold core abut, bottom center's line of lower mold core and first
The both ends of the surface of lower module and the second lower module are against formed face at grade.
3. a kind of control elbow-punching forming machine according to claim 1 and 2 it is characterised in that: also include drop front
And limited block, described drop front is arranged between upper mounted plate and support block, and described limited block is arranged on fixing pole, institute
State the first hydraulic press to be connected with described drop front and drop front oscilaltion can be driven.
4. a kind of control elbow-punching forming machine according to claim 1 and 2 it is characterised in that: the side of described support block
Face is arc concave shape, and the side that described first upper module and the second upper module are connected with support block is arc evagination, described arc
Shape indent is adapted with the shape of described arc evagination.
5. a kind of control elbow-punching forming machine according to claim 3 it is characterised in that: the side of described support block is
The side that arc concave shape, described first upper module and the second upper module are connected with support block is arc evagination, in described arc
Recessed and described arc evagination shape is adapted.
6. a kind of control elbow-punching forming machine according to claim 1 and 2 it is characterised in that: on the left of described upper mold core
For the semicolumn metal derby with inclined-plane, it is sheet metal on the right side of upper mold core, sheet metal is located at the middle part of metal derby, the upper end of metal derby
Flush with the upper end of sheet metal, metal derby lower end and sheet metal lower end form shoulder rank, sheet metal has through hole, outside sheet metal
Side is inclined design, the outside of sheet metal and the transition at a right angle of the lower end of sheet metal.
7. a kind of control elbow-punching forming machine according to claim 6 it is characterised in that: described lower mold core integrally becomes half
Ellipticity, lower mold core bottom surface is ellipse arc, is square posts, is provided with through hole, lower mold core in lug on the left of lower mold core surface
Surface middle part is provided with boss, on the left of lower mold core surface middle part boss and lower mold core surface and on the right side of lower mold core surface between be respectively provided with recessed
Groove.
8. a kind of control elbow-punching forming machine according to claim 6 it is characterised in that: the one of described first support bar
End is provided with connecting hole, and other end top is projection, and bottom is shoulder rank transition with the middle part of first support bar, and the middle part of projection is provided with
Breach, projection is provided with through hole, and described first support bar is identical with the structure of second support bar.
9. a kind of control elbow-punching forming machine according to claim 7 it is characterised in that: the one of described first support bar
End is provided with connecting hole, and other end top is projection, and bottom is shoulder rank transition with the middle part of first support bar, and the middle part of projection is provided with
Breach, projection is provided with through hole, and described first support bar is identical with the structure of second support bar.
10. a kind of control elbow-punching forming machine according to claim 1 and 2 it is characterised in that: described bottom plate exists
The direction placed perpendicular to pipeline is provided with groove, and described base end face is provided with raised line, the shape of described raised line and described groove
Shape be adapted, described base can on bottom plate along groove direction move.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610769387.6A CN106345867B (en) | 2016-08-30 | 2016-08-30 | A kind of control elbow-punching forming machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610769387.6A CN106345867B (en) | 2016-08-30 | 2016-08-30 | A kind of control elbow-punching forming machine |
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| CN106345867B CN106345867B (en) | 2018-10-23 |
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| CN107321856A (en) * | 2017-08-17 | 2017-11-07 | 徐州徐工施维英机械有限公司 | A kind of hydraulic press bend pipe mould |
| CN109013904A (en) * | 2018-09-04 | 2018-12-18 | 烟台泰利汽车模具股份有限公司 | A kind of hollow pipe bending die |
| CN112091640A (en) * | 2020-08-31 | 2020-12-18 | 温州良军电气有限公司 | Processing technology of metal round fastener |
| CN114472702A (en) * | 2022-04-06 | 2022-05-13 | 宁波沃特汽车部件有限公司 | Auxiliary frame hollow pipe forming device and process |
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| CN107321856A (en) * | 2017-08-17 | 2017-11-07 | 徐州徐工施维英机械有限公司 | A kind of hydraulic press bend pipe mould |
| CN109013904A (en) * | 2018-09-04 | 2018-12-18 | 烟台泰利汽车模具股份有限公司 | A kind of hollow pipe bending die |
| CN109013904B (en) * | 2018-09-04 | 2024-03-19 | 烟台泰利汽车模具股份有限公司 | Hollow tube bending die |
| CN112091640A (en) * | 2020-08-31 | 2020-12-18 | 温州良军电气有限公司 | Processing technology of metal round fastener |
| CN114472702A (en) * | 2022-04-06 | 2022-05-13 | 宁波沃特汽车部件有限公司 | Auxiliary frame hollow pipe forming device and process |
| CN114472702B (en) * | 2022-04-06 | 2022-08-02 | 宁波沃特汽车部件有限公司 | Auxiliary frame hollow pipe forming device and process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106345867B (en) | 2018-10-23 |
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