CN206578207U - A kind of U-shaped heavy forging continuous bending mould - Google Patents
A kind of U-shaped heavy forging continuous bending mould Download PDFInfo
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- CN206578207U CN206578207U CN201720152478.5U CN201720152478U CN206578207U CN 206578207 U CN206578207 U CN 206578207U CN 201720152478 U CN201720152478 U CN 201720152478U CN 206578207 U CN206578207 U CN 206578207U
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- bending
- forging
- mould
- cavity plate
- arc
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Abstract
The utility model discloses a kind of U-shaped heavy forging continuous bending mould, it is characterised in that including an arc entrance cavity plate, the back pressure mould of matched two bending guide plates of punch-pin and band；Wherein, the arc entrance cavity plate working surface profile is the 1/4 of complete circular arc, has been evenly arranged 38 roll shafts per side along operative orientation on arc surface, the roll shaft working surface and arc surface are tangent；The arc entrance cavity plate bottom is dovetail-shape, and is fastened with base with drift, and the dovetail other end is provided with spacer groove；Two positioning bars axially are disposed with along bending on the outside of the punch-pin lower surface, the detent formed with the inner surface precompressed of forging middle part matches；The back pressure mould is arranged inside arc entrance concave die cavity, and bending area shape does not match surface machined surface profile with outside in the middle part of forging thereon, and lower end is connected offer constant backpressure with hydraulic cylinder；This bending mould results in high dimensional accuracy and the bending forging of surface quality while saving production cost.
Description
Technical field
The utility model is related to a kind of machined die, more particularly to a kind of for adding to the progress bending of U-shaped heavy forging
The continuous bend processing mold of work.
Background technology
Curved super-long structure is still a great problem of the high-quality heavy forging bending production of restriction.U-shaped heavy forging is in bending
Easily cause load mutation, deformed area to be acutely thinned in deformation process, forging galled spots it is big, U-bend is cranked arm symmetry difference
Problem, forging total quality is low, easily causes potential safety hazard.Mainstream technology using common apparatus bending preform be aided with it is cold/
The bending special plane of thermal recalibration process or purchasing expensive avoids this technical barrier, causes process route tediously long, production cost pole
It is big to improve.
Therefore, to those skilled in the art, exploitation one kind can realize heavy forging essence on general forging equipment
Really, the heavy forging design of bending die of lossless, efficient bending production, to significantly reduce production cost, Improving The Quality of Products is very
It is necessary.
The content of the invention
In view of this, the purpose of this utility model is to provide a kind of U-shaped heavy forging that can implement on general forging equipment
Bending mould, to overcome the excessively scratch of the mutation of shaping load present in prior art, forging and contacting dies area and forge
The problem of part symmetry is poor.
The purpose of this utility model is achieved through the following technical solutions：
A kind of U-shaped heavy forging continuous bending mould, it is characterised in that：Matched including an arc entrance cavity plate, with cavity plate
Punch-pin and back pressure mould, be connected to the hydraulic cylinder of back pressure mould lower end, the bending guide plate for transmitting bending force and be arranged at cavity plate
Spacer groove on base；The arc entrance cavity plate is fixed on cavity plate base with drift, while can pass through spacer groove internal gasket
Two positioning bars axially are disposed with along bending on the outside of the increase and decrease adjustment clearance between punch and die of thickness, the punch-pin lower surface, with forging
The detent that middle part inner surface precompressed is formed matches, and the back pressure mould is arranged inside concave die cavity, thereon surface type face
Bending area shape does not match profile with outside in the middle part of forging, and lower end is connected offer constant backpressure, the bending with hydraulic cylinder
Guide plate hinge is connected with back pressure mould end, and the hydraulic cylinder is not by can be by back pressure mould top to arc entrance cavity plate upper table during external force
Face, now bending guide plate flattening is overlapped on arc entrance cavity plate horizontal segment.
Further, the arc entrance cavity plate profile is the 1/4 of complete circular arc, and radius is 100-350mm.
Further, the arc entrance cavity plate working surface has been evenly arranged 3-8 roll shaft along the direction of motion per side, described
Roll shaft is in dumbbell shape, and its radius of clean-up is 15-40mm, and it is 8-10mm's that roll shaft is reserved with depth with the surface that bending guide plate is contacted
Rectangle groove, groove width reserved 1-3mm gaps unilateral with respect to bending guide plate width, and channel inlet does chamfered.
Further, the surface that the bending guide plate is contacted with forging is reserved with the groove that depth is forging thickness 1/3-2/3,
Groove width reserved 3-5mm gaps unilateral with respect to forging width, and channel inlet does chamfered.
Further, the bending guide plate length takes 1/2 forging to bend arm lengths and hinge and arc entrance cavity plate planar section
The higher value of horizontal range, thickness need to ensure that bending guide plate has enough rigidity after groove is made.
Further, the bending guide plate preferably with hot die steel and is aided with Surface hardening treatment, it is ensured that case hardness is not
Less than 60HRC.
Further, the bending guide plate is hinged with back pressure mould, and the fit tolerance in joint pin and hole is not less than H10/
d10。
Further, the cross section of the hydraulic cylinder piston rod is square.
Further, the thickness of the pad is 0.3-1.0mm.
The beneficial effects of the utility model：
(1) bending load is significantly reduced, process steady and smooth.The utility model mould is made using cavity plate curved profile
, will (invention ZL200910104156.3) power can be concentrated once or twice in the prior art acute phase for bending movement locus
Property deformation change into once lasting continuous bend deformation process, flexural loading position with punch-pin it is descending from deformation effect area by
Step is transferred to the large deformation area of forging root, and forging bend arm is with the descending angle change recurred from 0 ° to 90 ° of punch-pin.It is whole
Individual process bending load, which is presented, to be risen, maintains to the smooth change declined, and the power without generally existing in the prior art can dash forward
Become (1-2 times) situation.Effectively reduction bending load and forging contact the damage at stand under load position with cavity plate, bring bending forging matter
The essence lifting of amount.
(2) positioning precision of bending machining process is significantly improved.Prior art is not given to process positioning precision
Enough attention, do not take effective measure to be ensured yet.In the utility model technical scheme of this application, first
Positioning bar is provided with punch-pin and the detent matched with positioning bar shape is provided with forging relevant position, bending fortune
Dynamic process forging is firmly locked in the presence of press ram and back pressure with punch-pin, overcomes spot placement accuracy in the prior art
Slip and offsetting that deficiency is caused；Secondly, by making groove on the inside of roll shaft working position and bending guide plate, formed cavity plate,
Moving component is all in default motion rail in roll shaft, bending guide plate and forging deformation position state all linked with one another, BENDING PROCESS
Implement processing operation in road, coordinate the piston rod of square-section, can effectively limit rotation and offsetting of the forging in X, Y plane.
With reference to back pressure mechanism, the positioning precision in process can be effectively improved, it is ensured that final forging's block dimension is precise and stable.
(3) mold work life-span and production flexibility are greatly improved., will be recessed in the utility model technical scheme of this application
Mould bottom design is dove-tail form and base engagement, and fastens positioning using wedge.In drift groove to being provided with pad on wing base
Film trap, and pre-install certain thickness pad when new molding jig is assembled.Can in real time it be measured according to the progress of production because minimum enters
Roll shaft abrasion or the die orifice of cavity die gap change caused by frock insufficient rigidity at mouthful, and existed by rationally increasing and decreasing spacer thickness
Adjustment in time and guarantee mould assembly precision in the course of work.The design of drift and spacer groove avoids the change of mould fitted position
The trouble of the cavity plate repeated disassembled and assembled positioning caused, it is ensured that BENDING PROCESS is accurate, continuous high-efficient is carried out, and greatly improves a whole set of bending
The working life and production flexibility of frock.
(4) the problem of forging deformation position is abraded fundamentally is solved.The utility model proposes technical scheme with it is existing
Compared based on the method that common apparatus is bent, most outstanding feature is that forging body is not straight with bending die and roll shaft
Contact, but the guiding of movement locus and the transmission of bending force are carried out using bending guide plate.Existing skill is solved from sheet
Forging is during 1-2 aggressive bend in art, and forging is seriously abraded with roll shaft contact site caused by load mutation, is excessively subtracted
Thin the problem of.
Brief description of the drawings
Fig. 1, by structural representation of the utility model using device, is forging in figure in bending is carried out.
Fig. 2 is roll shaft structure schematic diagram.
Embodiment
In order to illustrate more clearly of shape and structure of the present utility model, below using railway van coupler yoke forge piece as showing
Example forging, and the utility model is described in further detail with reference to its accompanying drawing.Herein it should be strongly noted that couple yoke
It is a kind of strength member of railway freight-car, is typical U-frame structure, is particularly suitable for implementation of the present utility model.
The utility model in the specific implementation, railway van coupler yoke forge piece 1 is realized by constructional device shown in Fig. 1, Fig. 2
Brake forming, its structure is, including an arc entrance cavity plate 7, and matched punch-pin 21 and the back of the body with bending guide plate 2
Pressing mold 16 realizes, wherein, the working surface 5 that the arc entrance cavity plate 7 is contacted with bending guide plate 2 is the 1/4 of complete circular arc, institute
State on arc surface 5 and to be evenly arranged 5 roll shaft 6a-6e per side along operative orientation, as shown in Fig. 2 the roll shaft 6 is in dumbbell shape,
The surface 24 contacted with bending guide plate 2 is reserved with rectangle groove 25, and the groove width reserves an order with respect to the width of bending guide plate 2
Side gap 23.Wherein roll shaft 6a working surfaces and arc entrance cavity plate top surface horizontal segment 18 is tangent, roll shaft 6b, 6c and 6d work
Surface and cambered surface 5 are tangent, and the die orifice upright side walls 15 of roll shaft 6e working surfaces and arc entrance cavity plate are tangent.The bending guide plate
2 end hinges 17 are connected with back pressure mould 16, and rectangular cross-section is designed with the surface 3 that bending guide plate 2 is contacted with couple yoke
Through slot 26, the whole deformation position of BENDING PROCESS couple yoke 1, which is all limited in through slot 26, to be carried out.The punch-pin lower surface 20
Outside is axially disposed with two positioning bars 4, the positioning bar 4 and the positioning that inner surface precompressed is formed in the middle part of couple yoke along bending
Groove 19 matches.The back pressure mould 16 is arranged inside the die cavity of arc entrance cavity plate 7, thereon surface machined surface profile and hook tail
Bending area shape does not match on the outside of in the middle part of frame, and lower end is connected offer constant backpressure with hydraulic cylinder 12, and the hydraulic cylinder 12 connects
Be connected to section for square piston rod 11, the hydraulic cylinder 12 not by back pressure mould 16 can be pushed up during external force to bending die cavity upper table
Face, is overlapped on the supporting surface that the horizontal segment of arc entrance cavity plate 7 is formed with roll shaft 3a working faces while bending guide plate 2 is flattened.Institute
State 7 bottoms of arc entrance cavity plate dovetail-shape, and fastened with base 10 with drift 9, the base 10 is another with cavity plate dovetail 14
One end is provided with spacer groove 13, and pre-installs when new molding jig is assembled certain thickness pad 8；When it is implemented, the punch-pin
21 upper ends are fabricated to staged, and coupler yoke forge piece 1 departs from concave die cavity with the backhaul of punch-pin 21 after convenient bending.Back pressure mould 16 is in liquid
Cylinder pressure 12 can stablize at idle position, original state that its surface is equal with the top surface 18 of arc entrance cavity plate under acting on, and work as exhibition
Open forging and trimming complete coupler yoke forge piece 1 be put on arc entrance cavity plate 7 after, the upper table of 1 backrest pressing mold of coupler yoke forge piece 16
Face shape coarse positioning.When it is implemented, the arc radius reasonable value scope of arc entrance cavity plate 7 is 280-300mm, roll shaft 6
Working portion radius reasonable value scope, which is that rectangle groove 25 is unilateral relative to bending guide plate width on 25-30mm, roll shaft, 1-
2mm gap 23, the depth of groove 25 is 8-10mm, and the length of bending guide plate 2 takes the 1/2 of couple yoke bending brachium, about 450mm,
The thickness of bending guide plate 2 takes 65-70 mm, it is contemplated that couple yoke flexural deformation back root part can produce the broadening of horizontal direction, so folding
Through slot 26 that curved guide plate 2 and coupler yoke forge piece 1 coordinate is unilateral to stay 5mm gaps 22, and gash depth is 17-20mm, pad 8
Thickness range is 0.3-1.0mm.After each parameter makees above-mentioned span, bending effect can be made optimal.
As the further improvement to above-described embodiment, the hydraulic cylinder piston rod is square cross section, to avoid
Back pressure modular belt moves rotation and offsetting of the coupler yoke forge piece in X, Y plane in BENDING PROCESS.
Using the utility model proposes the accurate continuous bending method of U-shaped heavy forging, and the ginseng limited according to claim
Number reasonable value production coupler yoke forge piece, products obtained therefrom is proposed with conventional bending mould and invention ZL200910104156.3
Couple yoke properties of product obtained by two-part bending mould are compared, and beneficial effect is very notable.Concrete outcome is as follows：
Note：Ratio data is in traditional first order buckling method as contrast benchmark in table
Finally illustrate, above example is only used for being illustrated more clearly that operation principle of the present utility model and process,
Limitation is not produced to the utility model.The utility model can be applicable to process the heavy forging of other shapes, and it processes former
Reason has no difference with examples detailed above, therefore is not required to repeat to illustrate.The utility model makes the place of creative contribution to prior art,
It is to propose a kind of New-Type U heavy forging continuous bend mould, efficiently solves universal in prior art and its improved technology
The problem of shaping load mutation, forging and contacting dies area excessively scratch of presence and poor forging symmetry, beneficial effect is very
Significantly.
Claims (9)
1. a kind of U-shaped heavy forging continuous bending mould, it is characterised in that：Matched including an arc entrance cavity plate, with cavity plate
Punch-pin and back pressure mould, the hydraulic cylinder for being connected to back pressure mould lower end, the bending guide plate for transmitting bending force and it is arranged at cavity plate bottom
Spacer groove on seat；The arc entrance cavity plate is fixed on cavity plate base with drift, while can be thick by spacer groove internal gasket
Axially it is disposed with the outside of the increase and decrease adjustment clearance between punch and die of degree, the punch-pin lower surface along bending in two positioning bars, with forging
The detent that portion's inner surface precompressed is formed matches, and the back pressure mould is arranged inside concave die cavity, and surface type face is taken turns thereon
Wide bending area shape does not match with outside in the middle part of forging, and lower end is connected offer constant backpressure with hydraulic cylinder, and the bending is led
Plate hinge is connected with back pressure mould end, and the hydraulic cylinder is not by can be by back pressure mould top to arc entrance cavity plate upper table during external force
Face, now bending guide plate flattening is overlapped on arc entrance cavity plate horizontal segment.
2. a kind of U-shaped heavy forging continuous bending mould as claimed in claim 1, it is characterised in that：The arc entrance cavity plate
Profile is the 1/4 of complete circular arc, and radius is 100-350mm.
3. a kind of U-shaped heavy forging continuous bending mould as claimed in claim 1, it is characterised in that：The arc entrance cavity plate
Working surface has been evenly arranged 3-8 roll shaft per side along the direction of motion, and the roll shaft is in dumbbell shape, and its radius of clean-up is 15-
40mm, roll shaft is reserved with the rectangle groove that depth is 8-10mm with the surface that bending guide plate is contacted, and groove width is led with respect to bending
The unilateral reserved 1-3mm gaps of plate width, and channel inlet does chamfered.
4. a kind of U-shaped heavy forging continuous bending mould as claimed in claim 1, it is characterised in that：Bending guide plate connects with forging
Tactile surface is reserved between the groove that depth is forging thickness 1/3-2/3, groove width reserved 3-5mm unilateral with respect to forging width
Gap, and channel inlet does chamfered.
5. a kind of U-shaped heavy forging continuous bending mould as claimed in claim 1, it is characterised in that：Bending guide plate length takes 1/2
Forging bends arm lengths and hinge and the higher value of arc entrance cavity plate planar section horizontal range, and thickness need to ensure that bending guide plate exists
There is enough rigidity after making groove.
6. a kind of U-shaped heavy forging continuous bending mould as claimed in claim 1, it is characterised in that：Bending guide plate is preferably with warm
Make mould steel and be aided with Surface hardening treatment, it is ensured that case hardness is not less than 60HRC.
7. a kind of U-shaped heavy forging continuous bending mould as claimed in claim 1, it is characterised in that：Bending guide plate and back pressure mould
It is hinged, the fit tolerance in joint pin and hole is not less than H10/d10.
8. a kind of U-shaped heavy forging continuous bending mould as claimed in claim 1, it is characterised in that：The horizontal stroke of hydraulic cylinder piston rod
Section is square.
9. a kind of U-shaped heavy forging continuous bending mould as claimed in claim 1, it is characterised in that：The Thickness model of pad
Enclose for 0.3-1.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720152478.5U CN206578207U (en) | 2017-02-14 | 2017-02-14 | A kind of U-shaped heavy forging continuous bending mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720152478.5U CN206578207U (en) | 2017-02-14 | 2017-02-14 | A kind of U-shaped heavy forging continuous bending mould |
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| Publication Number | Publication Date |
|---|---|
| CN206578207U true CN206578207U (en) | 2017-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720152478.5U Expired - Fee Related CN206578207U (en) | 2017-02-14 | 2017-02-14 | A kind of U-shaped heavy forging continuous bending mould |
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|---|---|
| CN (1) | CN206578207U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111496031A (en) * | 2020-05-22 | 2020-08-07 | 杭涛 | U-shaped pipe bending forming mechanism and bending process |
-
2017
- 2017-02-14 CN CN201720152478.5U patent/CN206578207U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111496031A (en) * | 2020-05-22 | 2020-08-07 | 杭涛 | U-shaped pipe bending forming mechanism and bending process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171024 Termination date: 20180214 |
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| CF01 | Termination of patent right due to non-payment of annual fee |