CN209550394U - Contactless friction process part Bending Slide Block structure and upper mold, Bending Mould - Google Patents
Contactless friction process part Bending Slide Block structure and upper mold, Bending Mould Download PDFInfo
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- CN209550394U CN209550394U CN201822095829.0U CN201822095829U CN209550394U CN 209550394 U CN209550394 U CN 209550394U CN 201822095829 U CN201822095829 U CN 201822095829U CN 209550394 U CN209550394 U CN 209550394U
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- sliding block
- slider body
- process part
- upper mold
- slide block
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Abstract
The utility model provides contactless friction process part Bending Slide Block structure and upper mold, Bending Mould, is related to bending field of mechanical technique, solves the contact friction problem between process part processing and sliding block.The Bending Slide Block structure includes slider body and the sliding block for being movably connected on its two sides, and sliding block can be moved along the inclined-plane of slider body, and sliding block is provided with the horizontal lateral guide groove for cooperating with the upper clamp plate of upper mold guiding；When slider body is relative to sliding block upstream or downstream, respective slide can be extrapolated for the inclined-plane of slider body or interior drawing.It is able to achieve uplink and downlink synchronous with upper clamp plate by lateral guide groove, sliding block in the contact friction on process part processing surface and shifts the promotion of process part processing when slider body and process part processing being avoided to contact.Sliding block and process part processing surface generates scratch and process part processing misalignment with respect to sliding when the upper mold and the Bending Mould can be avoided production bending component by Bending Slide Block structure.
Description
Technical field
The utility model relates to bending field of mechanical technique, are that a kind of contactless friction process part bending is sliding specifically
Block structure and the upper mold with the slide block structure and the Bending Mould with the slide block structure.
Background technique
Currently, sheet metal component is commonly present the case where bending material strip for being bent with back-off, in this way, bending punch-pin will use sliding block
Structure carrys out de- material.And the slider body in existing slider of bender structure is to be fixedly connected with upper clamp plate, the two of slider body
Side is flexibly connected sliding block, and under this configuration, when producing bending component, during the downlink of upper mold, sliding block can be in contact work
A moving contact friction process is just had to two side slips when sequence part surface, between sliding block and process part processing, sliding block is in lateral shifting
When dynamic, scratch can be caused to the surface of process part processing and sliding block and usually generates towards the impetus of side process part processing to lead to work
Sequence part is mobile and generates and shifts, and leading to the part of production, there are bending sizes that unstable, process part processing surface generates friction scrapes
The problem of scratches mark, in order to fixed step part, can increase in the two sides of bending female die in existing Bending Mould is process part processing
The positioning of limit is provided.Therefore, in process of production, positioning is adjusted often to meet size requirement, sliding block will be polished often
To solve the problems, such as to scratch.There is a problem of that accessory size quality is unstable, scrappage is high and production efficiency is very low.
Utility model content
The purpose of this utility model is that designing contactless friction process part Bending Slide Block structure and upper mold, bender
Tool, is able to achieve uplink and downlink synchronous with upper clamp plate by lateral guide groove, and sliding block is in work when slider body and process part processing being avoided to contact
The contact friction on sequence part surface and the promotion translocation to process part processing.The production efficiency, size and matter of bending component can be improved
The stability of amount.
The utility model is achieved through the following technical solutions:
The two sides of contactless friction process part Bending Slide Block structure, including slider body, the slider body have inclined-plane,
The two sides inclined-plane of the slider body has been movably connected with sliding block, and the sliding block can be moved along the inclined-plane of the slider body,
The sliding block is provided with horizontal lateral guide groove, and the lateral guide groove, which is used to be oriented to the upper clamp plate of upper mold, to be cooperated；The sliding block
When main body is relative to the sliding block uplink, the inclined-plane of the slider body can extrapolate the corresponding sliding block, the slider body
When relative to the slide block down, the slider body will be drawn in the corresponding sliding block.
When using above-mentioned setting structure, because increasing a horizontal lateral guide groove on the slide block, when on existing
When increasing the cross slide way for cooperating with lateral guide groove guiding on the upper clamp plate of mould, just the sliding block can be passed through institute
It states lateral guide groove and cross slide way is attached realization guiding cooperation, the sliding block then can be along the cross slide way and the transverse direction
The guide direction of guide groove kept while reciprocating movement the sliding block with the upstream or downstream of upper mold uplink synchronization or downlink.This
Sample, by after being flexibly connected of the slider body and upper mold, when the slider body downlink, the sliding block can then pass through the cunning
Block main body takes the lead in Contact operation part and moves outside, contacts that the sliding block when process part processing is no longer outer to be moved after the sliding block；The cunning
When block main body uplink, the sliding block prior to the slider body uplink and can be detached from the process part processing, therefore, described contactless to rub
It wipes process part processing Bending Slide Block structure and is able to achieve the sliding block to not sliding with process part processing in the bending process of the process part processing
Rubbing action, the purpose of scratch will not be generated on the process part processing by being able to achieve the sliding block, improve the steady of manufactured parts quality
It is qualitative, reduce parts scrap rate, and the sliding block will not push the process part processing to shift, improve production efficiency and
Dimensional stability.
It is further preferably to realize the utility model, especially use following setting structures: the slider body it is oblique
Face has oblique chute, and the sliding block has convex block, and the convex block and the oblique chute slide-and-guide cooperate.
Further to realize the utility model to be better, especially use following setting structures: the oblique chute is dovetail
Slot, the convex block are dovetail.
Further to realize the utility model to be better, especially use following setting structures: the lateral guide groove is T-type
Slot.
The utility model additionally provides a kind of upper mold with contactless friction process part Bending Slide Block structure, including from upper
Sequentially connected upper die holder, upper clamp plate and above-mentioned contactless friction process part Bending Slide Block structure under and；The upper clamp plate is set
It is equipped with horizontal cross slide way, the sliding block is cooperated by the lateral guide groove and cross slide way guiding, the sliding block master
Body is movably connected on the upper die holder, and the slider body can be moved up and down relative to the upper clamp plate, the slider body
Bottom surface is lower than the bottom surface of the sliding block, and the up stroke of the slider body is equal to the horizontal throw of the sliding block.
When using above-mentioned setting structure, upper mold downlink, the slider body takes the lead in contacting the upper surface of the process part processing simultaneously
Relative to sliding block uplink, the sliding block is mobile to the outside of the slider body, when the bottom of the slider body and the sliding block
When face is concordant, the sliding block is no longer outer to be moved, and mobile friction will not occur with the surface of the process part processing for the sliding block.Upper mold uplink
When, it is temporarily contacted with the surface of the process part processing under the restoring force effect that the slider body is acted in self gravity or therewith,
And the sliding block is then moved up relative to the slider body and to the slider body medial movement, the sliding block will not with it is described
Mobile friction occurs for the surface of process part processing.In this way, in the upper mold for when producing, the sliding block will not be on the process part processing
Scratch is generated, the stability of manufactured parts quality is improved, reduces parts scrap rate, and the sliding block will not push the work
Sequence part shifts, and can be improved production efficiency and dimensional stability.
Further to realize the utility model to be better, especially use following setting structures: the upper die holder is provided with
Vertically arranged upper mold spring, the free end of the upper mold spring are connected to the slider body, and the upper mold spring is for driving
Reset the slider body downlink.
Further to realize the utility model to be better, especially use following setting structures: the upper die holder is provided with
The free end of vertically arranged contour sleeve and guide post guide sleeve, the contour sleeve and guide post guide sleeve is separately connected the sliding block master
Body.
Further to realize the utility model to be better, especially use following setting structures: the slider body is located at
When top dead centre, the bottom surface of the slider body is concordant with the bottom surface of the sliding block.
The utility model additionally provides a kind of Bending Mould with contactless friction process part Bending Slide Block structure, including
Lower die and the above-mentioned upper mold with contactless friction process part Bending Slide Block structure.
When using above-mentioned setting structure, because of the structure of the upper mold, in manufactured parts, the sliding block will not be in the work
Scratch is generated on sequence part, the stability of manufactured parts quality can be improved, reduces parts scrap rate, and the sliding block will not push away
It moves the process part processing to shift, improves production efficiency and dimensional stability, and because the process part processing does not shift, it can
Cancel the positioning in existing Bending Mould.
Further to realize the utility model to be better, especially use following setting structures: the lower die includes from upper
Sequentially connected bending female die, lower bolster, lower die holder, lower padding iron, lower pallet under and, the bending female die inside are provided with lower de-
Plate, the bottom of the lower de- plate are connected with lower die spring, and the free end of the lower die spring connects the lower die holder.
It is further to realize the utility model to be better, especially use following setting structures: the bullet of the lower die spring
Power is greater than the elastic force of the upper mold spring.
The utility model have the following advantages that and the utility model has the advantages that
(1) in the Bending Slide Block structure of the utility model, Bending Slide Block structure as Bending Mould upper mold wherein one
Component is assembled in upper mold, and when being able to achieve production has the bending component of barb, the surface of process part processing will not be with sliding block
Surface occurs sliding friction and generates scratch, does not need to improve the stability of manufactured parts quality, drop to sliding block and part polishing
Low parts scrap rate, and the sliding block will not push the process part processing to shift, and improve production efficiency and size is steady
It is qualitative.
(2) in the upper mold of the utility model, wherein component part of the upper mold as Bending Mould is assembled in bender
When on tool, by the drive of bending machine, when upper mold downlink, slider body take the lead in Contact operation part upper surface and relative to sliding block
Uplink, sliding block is mobile to the outside of slider body, and when slider body is concordant with the bottom surface of the sliding block, sliding block is no longer outer to be moved,
Mobile friction will not occur with the surface of process part processing for sliding block.When upper mold uplink, what slider body was acted in self gravity or therewith
It is temporarily contacted with the surface of process part processing under restoring force effect, and sliding block is then moved up relative to slider body and on the inside of slider body
Mobile, mobile friction will not occur with the surface of process part processing for sliding block.In this way, in upper mold for when producing, sliding block will not be in process
Scratch is generated on part, improves the stability of manufactured parts quality, reduces parts scrap rate, and the sliding block will not push institute
It states process part processing to shift, can be improved production efficiency and dimensional stability.
(3) in the Bending Mould of the utility model, when Bending Mould is assemblied on bending machine, because of the structure of upper mold, in life
When producing part, sliding block will not generate scratch on process part processing, can improve the stability of manufactured parts quality, reduce part rejection
Rate, and sliding block will not push the process part processing to shift, and improve production efficiency and dimensional stability, and because of process part processing
It does not shift, the positioning in existing Bending Mould can be canceled.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of existing Bending Mould；
Fig. 2 is the structural schematic diagram under the die opening state of the Bending Mould in the utility model；
Fig. 3 is the structural schematic diagram under the closed mode state of the Bending Mould in the utility model；
Fig. 4 is the perspective structure schematic diagram that upper mold is in die opening state；
In the figure, it is marked as
1- upper die holder；The high sleeves-such as 2；3- upper mold spring；4- guide post guide sleeve；5- upper clamp plate；6- lateral guide groove；7- is sliding
Block；8- slider body；9- process part processing；10- Bending Mould；Plate is taken off under 11-；12- lower bolster；13- lower die holder；14- lower padding iron；
15- lower pallet；16- lower die spring；17- positioning；18- cross slide way.
Specific embodiment
To keep the purpose of this utility model, technical solution and advantage clearer, below by the technology to the utility model
Scheme is described in detail.Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work
Obtained all other embodiment is put, the range that the utility model is protected is belonged to.
Embodiment 1:
Contactless friction process part Bending Slide Block structure is able to achieve uplink and downlink synchronous with upper clamp plate by lateral guide groove,
Sliding block is in the contact friction on process part processing surface and to the promotion translocation of process part processing when slider body and process part processing being avoided to contact.
The stability of production efficiency, size and quality that bending component can be improved is specifically arranged to as shown in Figure 1, Figure 2, Figure 3, Figure 4
Following structures:
Slider body 8 including an irony, the bending of the slider body 8 and the existing process part processing for bending strip barb
The slider body structure of machine is consistent, is the trapezoidal structural member in a cross section, then the left and right sides of slider body 8 is an inclined-plane,
The two sides up and down of slider body 8 are a flat surface.There are the sliding block 7 of an irony, sliding block in the inclined-plane of the left and right sides of slider body 8 respectively
7 are flexibly connected with slider body 8, and sliding block 7 can be moved along the inclined-plane of slider body 8.The Bending Slide Block structure when in use, sliding block
Main body 8 is just put, and is up-small and down-big trapezium structure part.The lateral guide groove 6 of horizontal extension is offered in the top surface of sliding block 7, it should
Lateral guide groove 6, which is used to be oriented to the upper clamp plate 5 of upper mold, to be cooperated, and when guiding cooperates, the bottom surface of upper clamp plate 5 can fit on and the transverse direction
The matched guide frame of guide groove 6.
When the Bending Slide Block Standard is when on bending machine, and the slider body 8 is relative to 7 uplink of sliding block, sliding block master
The inclined-plane of body 8 can extrapolate respective slide 7, and when slider body 8 is relative to 7 downlink of sliding block, slider body 8 will be in respective slide 7
It draws.
Specifically, the inclined-plane of slider body 8 has at least one oblique chute, sliding block 7 has convex block, and convex block and oblique chute are sliding
Action-oriented cooperation.And a kind of preferred embodiment as oblique chute and convex block, the oblique chute are dovetail groove, which is dovetail.
Preferably, which is T-slot, and the guide frame matched with lateral guide groove 6 is T-type sliding block, the T
Type sliding block is generally fixed by screws on upper clamp plate 5.
Because increasing a horizontal lateral guide groove 6 on sliding block 7, it is used for when increasing on the upper clamp plate 5 in existing upper mold
When the cross slide way 18 cooperated with the guiding of lateral guide groove 6, just sliding block 6 can be carried out by lateral guide groove 6 with cross slide way 18
Guiding cooperation is realized in connection.Sliding block 6 then can transversely the guide direction of guide rail 18 and lateral guide groove 6 move back and forth while keep
Sliding block 7 uplink synchronization or downlink with the upstream or downstream of upper mold.In this way, by after being flexibly connected of slider body 8 and upper mold, it is sliding
When 8 downlink of block main body, the Contact operation part 9 that can then be taken the lead in by slider body 8 of sliding block 7 moves outside, and process part processing 9 is contacted after sliding block 7
When sliding block 7 is no longer outer moves；When 8 uplink of slider body, sliding block 7 prior to 8 uplink of slider body and can be detached from process part processing 9, therefore, nothing
Contact friction process part Bending Slide Block structure is able to achieve sliding block 7 to not sliding with process part processing 9 in the bending process of process part processing 9
Rubbing action, the purpose of scratch will not be generated on process part processing 9 by being able to achieve sliding block 7, improve the stability of manufactured parts quality, drop
Low parts scrap rate, and institute's sliding block 7 will not push process part processing 9 to shift, and can be improved production efficiency and dimensionally stable
Property.
Embodiment 2:
The present embodiment provides a kind of with contactless friction process part Bending Slide Block knot on the basis of the above embodiments
The upper mold of structure especially uses following setting structures:
The upper mold includes the contactless friction work in sequentially connected upper die holder 1, upper clamp plate 5 and embodiment 1 from top to bottom
Sequence part Bending Slide Block structure.The bottom surface of upper clamp plate 5 is provided with horizontal cross slide way 18, which is located at lateral guide groove
6 matched T-type sliding blocks, cross slide way 18 are removably attached to the bottom surface of upper clamp plate 5 by screw.Cross slide way 18 slides into cross
Into guide groove 6, sliding block 7 realizes slide-and-guide cooperation by lateral guide groove 6 and cross slide way 18.Slider body 8 is movably connected on
On upper die holder 1, slider body 8 can be moved up and down relative to upper clamp plate 5.Under die opening state, the bottom surface of slider body 8 should be low
In the bottom surface of sliding block 7, the up stroke of slider body 8 is equal to the horizontal throw of sliding block 7.When upper mold is assembled on bending machine,
In production process, upper mold downlink, slider body 8 can take the lead in Contact operation part 9 upper surface and relative to 7 uplink of sliding block, at this moment,
Sliding block 7 is mobile to the outside of slider body 8, and when slider body 8 is concordant with the bottom surface of sliding block 7, sliding block 7 is no longer outer to be moved, herein
In the process, mobile friction will not occur with the surface of process part processing 9 for sliding block 7.When upper mold uplink, slider body 8 in self gravity or
It is temporarily contacted with the surface of process part processing 9 under the restoring force effect acted on therewith, and sliding block 7 then moves up simultaneously relative to slider body 8
To 8 medial movement of slider body, in the process, mobile friction will not occur with the surface of process part processing 9 for sliding block 7.In this way, upper
Mould is for when producing, sliding block 7 will not to generate scratch, the stability of raising manufactured parts quality, reduction part report on process part processing 9
Useless rate, and the sliding block 7 will not push the process part processing 9 to shift, and can be improved production efficiency and dimensionally stable
Property.
Specifically, penetrating and being fixed with vertically arranged contour sleeve 2, upper mold spring 3 at the top of slider body 8 and lead
Column guide sleeve 4, the top of contour sleeve 2, upper mold spring 3 and guide post guide sleeve 4 pass through upper clamp plate 5 and are fixed in upper die holder 1, etc.
High sleeve 2 realizes the limit to slider body 8, and guide post guide sleeve 4 realizes guiding when moving up and down to slider body 8 to mention
High operation stability, upper mold spring 3 is that slider body 8 provides screen resilience, for driving 8 downlink of slider body to reset.It is sliding
When block main body 8 is located at top dead centre, the bottom surface of slider body 8 is concordant with the bottom surface of sliding block 7.
Embodiment 3:
The present embodiment provides a kind of with contactless friction process part Bending Slide Block knot on the basis of the above embodiments
The Bending Mould of structure especially uses following setting structures:
The upper mold with contactless friction process part Bending Slide Block structure including lower die and embodiment 2.
Specifically, lower die includes sequentially connected bending female die 10, lower bolster 12, lower die holder 13, lower padding iron from top to bottom
14, lower pallet 15 are provided with lower de- plate 11 on the inside of bending female die 10, and the bottom of lower de- plate 11 is connected with vertically arranged lower die bullet
The bottom end of spring 16, lower die spring 16 connects lower die holder 13.Wherein, the elastic force of lower die spring 16 is greater than the bullet of the upper mold spring 3
Power.
The general structure of Bending Mould in the prior art is similar to the structure of the Bending Mould in the present embodiment, and institute is different
, the slider body in existing Bending Mould when in use with the slider body 8 in the present embodiment at the relationship of inversion, and
Slider body in existing Bending Mould is fixedly connected with upper clamp plate, and sliding block connects as the two sides activity of slider body
It connects, therefore, existing Bending Mould can increase positioning 17 in the two sides of bending female die and come to work in order to avoid the offset of process part processing
Sequence part realizes limit.
Because of the structure of upper mold, when producing bending component, sliding block 7 will not generate scratch on process part processing 9, can improve production
The stability of part quality reduces parts scrap rate, and sliding block 7 will not push process part processing 9 to shift, and improve production
Efficiency and dimensional stability, and because process part processing 9 does not shift, the positioning 17 in existing Bending Mould can be canceled.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
In this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation
Or replacement, it should be covered within the scope of the utility model.
Claims (11)
1. contactless friction process part Bending Slide Block structure, it is characterised in that: including slider body (8), the slider body (8)
Two sides there is inclined-plane, the two sides inclined-plane of the slider body (8) has been movably connected with sliding block (7), and the sliding block (7) can edge
The inclined-plane of the slider body (8) is mobile, and the sliding block (7) is provided with horizontal lateral guide groove (6), the lateral guide groove (6)
Cooperation is oriented to for the upper clamp plate (5) with upper mold；
When the slider body (8) is relative to the sliding block (7) uplink, the inclined-plane of the slider body (8) can incite somebody to action corresponding described
Sliding block (7) extrapolation, when the slider body (8) is relative to the sliding block (7) downlink, the slider body (8) will be corresponding described
It is drawn in sliding block (7).
2. contactless friction process part Bending Slide Block structure according to claim 1, it is characterised in that: the slider body
(8) inclined-plane has oblique chute, and the sliding block (7) has convex block, and the convex block and the oblique chute slide-and-guide cooperate.
3. contactless friction process part Bending Slide Block structure according to claim 2, it is characterised in that: the oblique chute is
Dovetail groove, the convex block are dovetail.
4. contactless friction process part Bending Slide Block structure according to claim 1 or 2 or 3, it is characterised in that: the cross
It is T-slot to guide groove (6).
5. the upper mold with contactless friction process part Bending Slide Block structure, it is characterised in that: including being sequentially connected from top to bottom
Upper die holder (1), upper clamp plate (5) and the described in any item contactless friction process part Bending Slide Block structures of claim 1-4；Institute
It states upper clamp plate (5) to be provided with horizontal cross slide way (18), the sliding block (7) passes through the lateral guide groove (6) and the transverse direction
Guide rail (18) guiding cooperation, the slider body (8) are movably connected on the upper die holder (1), and the slider body (8) can be opposite
It is moved up and down in the upper clamp plate (5), the bottom surface of the slider body (8) is lower than the bottom surface of the sliding block (7), the sliding block master
The up stroke of body (8) is equal to the horizontal throw of the sliding block (7).
6. the upper mold according to claim 5 with contactless friction process part Bending Slide Block structure, it is characterised in that: institute
It states upper die holder (1) and is provided with vertically arranged upper mold spring (3), the free end of the upper mold spring (3) is connected to the sliding block
Main body (8), the upper mold spring (3) is for driving the slider body (8) downlink to reset.
7. the upper mold according to claim 6 with contactless friction process part Bending Slide Block structure, it is characterised in that: institute
It states upper die holder (1) and is provided with vertically arranged contour sleeve (2) and guide post guide sleeve (4), the contour sleeve (2) and guide post guide sleeve
(4) free end is separately connected the slider body (8).
8. the upper mold according to claim 7 with contactless friction process part Bending Slide Block structure, it is characterised in that: institute
When stating slider body (8) and being located at top dead centre, the bottom surface of the slider body (8) is concordant with the bottom surface of the sliding block (7).
9. the Bending Mould with contactless friction process part Bending Slide Block structure, it is characterised in that: wanted including lower die and right
Seek the described in any item upper molds with contactless friction process part Bending Slide Block structure of 6-8.
10. the Bending Mould according to claim 9 with contactless friction process part Bending Slide Block structure, feature exist
In: the lower die includes sequentially connected bending female die (10), lower bolster (12), lower die holder (13), lower padding iron from top to bottom
(14), lower pallet (15), bending female die (10) inside are provided with lower de- plate (11), the bottom connection of the lower de- plate (11)
Have lower die spring (16), the free end of the lower die spring (16) connects the lower die holder (13).
11. the Bending Mould according to claim 10 with contactless friction process part Bending Slide Block structure, feature
Be: the elastic force of the lower die spring (16) is greater than the elastic force of the upper mold spring (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822095829.0U CN209550394U (en) | 2018-12-13 | 2018-12-13 | Contactless friction process part Bending Slide Block structure and upper mold, Bending Mould |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822095829.0U CN209550394U (en) | 2018-12-13 | 2018-12-13 | Contactless friction process part Bending Slide Block structure and upper mold, Bending Mould |
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| CN209550394U true CN209550394U (en) | 2019-10-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112517750A (en) * | 2020-11-26 | 2021-03-19 | 童丹桂 | Female die for local secondary forming of section steel |
| CN112547926A (en) * | 2020-11-26 | 2021-03-26 | 童丹桂 | Local forming device of C shaped steel |
-
2018
- 2018-12-13 CN CN201822095829.0U patent/CN209550394U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112517750A (en) * | 2020-11-26 | 2021-03-19 | 童丹桂 | Female die for local secondary forming of section steel |
| CN112547926A (en) * | 2020-11-26 | 2021-03-26 | 童丹桂 | Local forming device of C shaped steel |
| CN112517750B (en) * | 2020-11-26 | 2023-04-21 | 山东德昊交通设施有限公司 | Female die for local secondary forming of section steel |
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