CN107695276A - The new manufacturing process of spherical flange core axial workpiece and mould - Google Patents
The new manufacturing process of spherical flange core axial workpiece and mould Download PDFInfo
- Publication number
- CN107695276A CN107695276A CN201711089082.1A CN201711089082A CN107695276A CN 107695276 A CN107695276 A CN 107695276A CN 201711089082 A CN201711089082 A CN 201711089082A CN 107695276 A CN107695276 A CN 107695276A
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- Prior art keywords
- cavity plate
- mould
- pin
- cup
- punch
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/06—Making machine elements axles or shafts
- B21K1/12—Making machine elements axles or shafts of specially-shaped cross-section
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/06—Making machine elements axles or shafts
- B21K1/063—Making machine elements axles or shafts hollow
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
A kind of spherical flange mandrel class part manufacturing process, pass through the pretreatment by slab by electric roller-way stove heat and graphite coating, then slab is placed in the first work step of hydraulic press table top mould drop-down plutonic cup shell, jumping-up is carried out along cup shell upper surface using punch-pin in the second work step mould again, it is the semi-finished product that the shaft-like other end is cup to obtain one end, finally carries out cold-finishing processing to semi-finished product and obtains spherical flange bobbin-type part.The present invention devises brand-new pressure processing method as requested, has the small loss technique of more high production rate.High labor productivity is not only ensure that, material is saved, reduces energy consumption, or even can be completed now in a secondary mould by several processes originally.
Description
Technical field
The present invention relates to a kind of technology of mechanical manufacturing field, specifically a kind of spherical flange core axial workpiece is new
Manufacturing process and mould.
Background technology
It is as shown in Figure 1 with spherical flange-type part.In various industrial department automobiles, robot technology, Aero-Space, instrument
Instrument, it can be seen that such part uses as main ball pivot chain rivet.Even when lens are processed, fixed using its half concave surface
Abrasive material is as polishing tool.High request is proposed to part according to performance and geometrical precision at present, had in its manufacture
It is a series of to be difficult to solve the problems, such as, and then need high consumptive material and more with hemispherical flange core bar type part according to common process manufacture
Process hot forging, being equipped with a large amount of machinings could complete, and automobile out star wheel-class parts as shown in Figure 2 are, it is necessary to 20 multiple working procedures.
The content of the invention
The present invention is directed to deficiencies of the prior art, proposes a kind of new manufacture of spherical flange core axial workpiece
Technique and mould, brand-new pressure processing method is devised as requested, there is the small loss technique of more high production rate.Not only it ensure that
High labor productivity, save material, reduce energy consumption, or even being completed now in a secondary mould by several processes originally.
The present invention is achieved by the following technical solutions：
The present invention relates to a kind of new manufacturing process of spherical flange core axial workpiece, slab is passed through into electric roller-way stove heat
With the pretreatment of graphite coating, slab is then placed in the first work step of hydraulic press table top mould drop-down plutonic cup shell, then the
Jumping-up is carried out along cup shell upper surface using punch-pin in two work step moulds, obtain that one end is that the shaft-like other end is cup half into
Product, cold-finishing processing finally is carried out to semi-finished product and obtains spherical flange bobbin-type part.
Described slab, cleaning is preferably first passed through in advance.
Described pretreatment, in particular to：Slab is placed in electric roller furnace when being heated to 150 DEG C to slab tow sides
Graphite spraying lubricant, then proceedes to be heated to 400 DEG C to come out of the stove.
Described electric roller furnace, it is internal using low heat capacity, the high-quality ceramic fibre refractory material of low superconductivity.
The first described work step mould includes：Be arranged at the first punch-pin, the second punch-pin and pressing device on cope plate with
And fixation cavity plate, push rod and wall of cup building mortion in lower template are arranged at, wherein：Above wall of cup building mortion and side point
It is not in contact with pressing device and push rod.
The second described work step mould includes：The pellet with disk spring that is arranged inside punch-pin and therewith face
The cavity plate of setting, wherein：The center of cavity plate is provided with die hole and push rod, when hydraulic press it is descending promote punch-pin it is descending, first with
By plectane base drawing cup-shaped part in active friction cupping tool, then cup shell is moved on in the second work step mould, along cup
Part end perisporium jumping-up, force material to flow into and core bar part is formed in die hole.
The ram speed of described forcing press is advisable with 25~30mm/s.
In order to eliminate in jumping-up, cylindrical section is being started because action of compressive stress unstability folds using above-mentioned pellet
It can just be contacted during jumping-up with cup blank wall portion.
Described cold-finishing processing refers to：Go after flash removed and remove the miscellaneous of workpiece surface and mould impression with compressed air
Matter, and honing and ultrasonic polishing are carried out to finishing mold impression, impression surface roughness is reached Ra0.2.Finishing cavity plate
Depth of die cavity is greater than the length of workpiece bar portion.The uniformity and interchangeability of product are ensure that after finishing.The roughness on surface
Ra1.6 is brought up to by Ra3.2.
Technique effect
Compared with prior art, technique effect of the invention includes：
1) blank, which is placed in the first work step, has drawing in active friction mould, and compared with general backward extrusion, deformation force can be with
30% is reduced to, the punch-pin life-span improves 2~3 times.Trimming process not only laborsaving but also that release is cumbersome；
2) Part Surface Roughness is fine after longitudinal upsetting squeeze.By retrofit, reach impression surface roughness
Ra0.2.The uniformity and interchangeability of product are ensure that after finishing.The roughness on surface also brings up to Ra1.6 by Ra3.2.
3) upsetting squeeze technical process especially reduces sheet material elastic recovery.The diameter accuracy of part reaches 3~5 grades.
4) each part reduces half by former 20 multiple working procedures, compared with current technology section material 24%；Production efficiency improves 1 times.
Brief description of the drawings
Fig. 1 is spherical flange core barrel part schematic diagram；
In figure：D is axle diameter, d1For cylindrical flange internal diameter, d2For cylindrical flange external diameter, l1For cylindrical flange
Highly, l2For cylindrical flange+spherical segment height, l3For part height；
Fig. 2 is bell-jar net-size forging schematic diagram；
Fig. 3 is embodiment blank deformation process schematic diagram；
In figure：A be slab punching blanking, B be drawing cup-shaped part, C be upsetting into being upsetting squeeze with cylindrical section hemispherical, D
Combination process；
Fig. 4 is the second work step mould schematic diagram；
In figure：401 it is punch-pin, 402 be pellet, 403 be cavity plate, 404 be cup shell, 405 be push rod, 406 is dish-shaped bullet
Spring, 407 are die hole；
Fig. 5 is the first work step mould schematic diagram；
In figure：501 cope plates, 502 punch-pin, 503 punch-pin, 504 cavity plate walls, 505 lower templates, 506 guide pillars, 507 guide pin bushings,
Cavity plate, 515 push back pins, 516 tops are fixed in 508 pillars, 509 elevating levers, 510 guide pillars, 511 pressing plates, 512 poles, 513 springs, 514
Bar, 517 cushion pads；
Fig. 6 be cavity plate it is spherical from cylinder bore sentence different radius of corner union piece mandrels and start extruding form moment
In figure：Part A r=2mm；Part B r=8mm；
Fig. 7 (a) is extruding force and half radius of a ball R relations；(b) friction coefficient μ relation is shown between extruding force and sheet material and cavity plate
It is intended to；
Fig. 8 (a) is that core bar is located above hemisphere and (b) core bar is located at hemisphere both sides Compound Extrusion schematic diagram.
Embodiment
The present embodiment devises brand-new shaping work step, as shown in Fig. 3, Fig. 4, Fig. 5, for the shaping work step of the present embodiment use
And mould structure.The present embodiment specifically uses ball internal diameter R=35mm, wall thickness S=2.5mm, the high 20mm of cylindrical section, blank material aluminium
Alloy 5A03 (GJB2351-1995), the material is not heat-treatable strengthened, hydraulic press maximum, force 10MN.
The slab that blanking cleaning has been dried is placed in electric roller furnace, using low heat capacity, the high-quality pottery of low superconductivity in stove
Porcelain fiber fireproof material, day island proper electricity FP93 may be programmed PID regulator and realize high-precision temperature control system.Survey the loss of furnace wall appearance
Temperature is less than 56 DEG C；Stove temp precision reaches ± 1 DEG C.Automatic spray coating mechanism is preset when being heated to 150 DEG C, in stove automatically will
Blank tow sides graphite spraying lubricant.Then proceed to be heated to 400 DEG C to come out of the stove.
Plectane will be heated to be placed on the cavity plate of the first work step mould, as shown in Figure 5.Plectane base is first passed through into the first work step
Mould drawing is into cup shell as shown in Figure 3 B.The first work step mould includes：The first punch-pin being arranged on cope plate 501
502nd, the second punch-pin 503 and pressing device and the fixation cavity plate 514, push rod 516 and the wall of cup shaping that are arranged in lower template 505
Device, wherein：Above wall of cup building mortion and side is in contact with pressing device and push rod 516 respectively.
Described cope plate 501 and lower template 505 realizes alignment positioning by guide pillar guide sleeve structure.
Described wall of cup building mortion includes：Drive end and configured ends, wherein：Configured ends and drive end rotation connection, drive
Moved end is connected with lower template 501, and configured ends are in contact with pressing device and push rod 516 respectively.
Described configured ends include：Cavity plate wall 504 and pole 512 and the buffering for being arranged at cavity plate wall both sides about 504
Pad 517, wherein：Pole 12 is used to adjust the action time of pressing plate 11, and cushion pad 17 is used for cavity plate wall 504 and resets cushioning effect.
Described drive end includes：Elevating lever 509 and push back pin 515, wherein：Cavity plate in elevating lever 509 and configured ends
Wall 504 is rotatablely connected.
Described pressing device is realized by guide pillar 510, pressing plate 511 and spring 513.
Template 1 in the first work step mould moves downward and is placed on the working portion of punch-pin 503 and pressing plate 511 recessed
Blank contact in mould 514, when power necessary to reaching blanked metal deformation, metal starts to punch-pin 503 and cavity plate wall 504
Between gap flowing, in the presence of pressing plate 511, the upper surface of blank has obtained uniform deformation.When the stroke of punch-pin arrives
During up to 1/3 impulse stroke, the motion of cavity plate wall 504 starts motion upwards under mechanical lifting effect, and its speed lifted surmounts
Metal flows to the speed (establishing positive friction) of wall portion.Compared with general backward extrusion, deformation force can be reduced to 30%,
The punch-pin life-span improves 2~3 times.
In the presence of pressing plate 511, pillar 512 is removed.Then pressing plate 511 moves upwardly together with cavity plate wall, until
Untill the numerical requirements for reaching cup shell base thickness.Then template 501 rises to home position, forcing press push rod ejection workpiece.It is recessed
Die wall 504 recovers home position in the presence of response agency 515.Cup shell is then moved on to the second work step as shown in Figure 4
In mould.
As shown in figure 4, the second work step mould includes used by the present embodiment：It is arranged inside punch-pin 401 and carries dish
The cavity plate 403 that the pellet 402 of shape spring 406 and therewith face are set, wherein：Cup shell 404 is arranged at cavity plate 403 and 401
Between punch-pin, the center of cavity plate 403 is provided with die hole 407 and push rod 405.
Cup shell perisporium jumping-up is forced material to flow into die hole 407 as shown in Figure 4 and formed by the second work step mould
Core bar part 404 as shown in Figure 4.In jumping-up, usually there is defect, in cylindrical section due to action of compressive stress, cylindrical section unstability
Fold.Folded to eliminate, using inner support pellet 402.In order that support block just can be with cup hair when starting jumping-up
Base wall portion contacts, and is provided with disk spring on support block top, with slide block down, compression spring, support pellet is attached to always
Sheet material inwall, prevent sheet material unstability in whole upsetting process.To take out forging, push rod 405 is set.
In order to determine that the specification of blank power and stress state have used the simulation of QForm V8 softwares should in upsetting-crowded recombination process
Process.In order to select cavity plate optimum geometry, radius of corner r changes pair between spherical part cavity plate and cylinder bore are determined
Mandrel, which is formed, starts extruding influence.It was observed that being gradually formed as radius of corner r increase folds, the folding that Fig. 6 is formed is exactly
Formed in r=8mm.
In order to select cavity plate optimum geometry, excessive radius of corner between spherical part cavity plate and cylinder bore is determined
R changes, which start extruding on mandrel, to be influenceed, aperture=2S=5mm of described die hole 407.It was observed that the increasing with radius of corner
Big fold is formed (see Fig. 6).In radius of corner r=2mm, do not have and fold out when spherical upsetting squeeze forms core bar into hole
It is existing.
Described pellet 402 uses electroslag remelting H13 hot die steels, 46~49HRC of vacuum heat hardness.
Gap is 0.1mm between described punch-pin and cavity plate wall and support block, and such gap ensures that forging end will not
There is burr.
In order to by cavity plate under arms between abrasion, the error caused by elastic deformation be minimized, negative molding material selects powder
The metallurgical superhard alloy in end, hardness reach more than HV1037, and compression strength reaches 3900MPa.
In order to solve cavity plate impression during electric machining because of the scaling loss and electric machining of electrode it is gauged caused by error, to recessed
The electro-discharge machining of the impression of mould uses roughing → middle processing → multielectrode processing technology of semifinishing → finishing, electrode
Material selects copper-tungsten.The discharging gap of reasonable selection each operation is wanted simultaneously, wherein, the unilateral setting of discharging gap of finishing
In 0.015~0.02mm, substantially eliminate electrical spark working man-hour because of electrode erosion and electrical guiding rule the error caused by mould, protect
The uniformity of impression precision is demonstrate,proved.
Such as Fig. 7 b）It is shown, described extruding force and coefficient of friction relation, by simulated test, determine blank extruding force with
Friction co-efficient value is closely related, i.e., to Same Part, coefficient of friction is bigger, and extruding force is bigger；The present invention is required to be directed to this reality
Relation/the technical requirements applied between institute's extruding force/frictional force are specially：Through experiment, friction coefficient μ=0.3 of the present invention, upsetting squeeze
Power=300 ton.
Upsetting squeeze complex method of the present invention, extruding plug can all be implemented on hemisphere or in both sides, as shown in Figure 8.
Above-mentioned specific implementation can by those skilled in the art on the premise of without departing substantially from the principle of the invention and objective with difference
Mode local directed complete set is carried out to it, protection scope of the present invention is defined by claims and not by above-mentioned specific implementation institute
Limit, each implementation in the range of it is by the constraint of the present invention.
Claims (10)
1. a kind of spherical flange mandrel class part manufacturing process, it is characterised in that slab is passed through into electric roller-way stove heat and stone
The pretreatment of ink spraying, slab is then placed in the first work step of hydraulic press table top mould drop-down plutonic cup shell, then in the second work
Walk in mould and jumping-up is carried out along cup shell upper surface using punch-pin, it is the semi-finished product that the shaft-like other end is cup to obtain one end, most
Cold-finishing processing is carried out to semi-finished product afterwards and obtains spherical flange bobbin-type part.
2. technique according to claim 1, it is characterized in that, described pretreatment, in particular to：Slab is placed in electric roller-way
To slab tow sides graphite spraying lubricant when being heated to 150 DEG C in stove, then proceed to be heated to 400 DEG C to come out of the stove.
3. technique according to claim 1, it is characterized in that, the first described work step mould includes：With active friction mould
Lamps structure：First work step mould includes：The first punch-pin, the second punch-pin and the pressing device that are arranged on cope plate and it is arranged at
Fixation cavity plate, push rod and wall of cup building mortion in lower template, wherein：Above wall of cup building mortion and side respectively with compression
Device and push rod are in contact；
Described wall of cup building mortion includes：Drive end and configured ends, wherein：Configured ends and drive end rotation connection, drive end
It is connected with cope plate, by lever actuated, configured ends are in contact with pressing device and push rod respectively；
Described configured ends include：Cavity plate wall and the elevating lever and cushion pad for being arranged at both sides above and below cavity plate wall, wherein：Lifting
Bar moves for lifting cavity plate and adjusts the pressing plate function time upwards, and cushion pad is used for cavity plate wall and resets cushioning effect；
Described drive end includes：Elevating lever and push back pin, wherein：Cavity plate wall rotation connection in elevating lever and forming ends.
4. technique according to claim 1, it is characterized in that, the second described work step mould includes：It is arranged inside punch-pin
Pellet with disk spring and face is set therewith cavity plate, wherein：The center of cavity plate is provided with die hole and push rod, when
Hydraulic press is descending to promote punch-pin descending, and first cup shell is then moved to plectane base drawing cup-shaped part in common cupping tool
Into the second work step mould, along cup shell end perisporium jumping-up, force material to flow into and core bar part is formed in die hole.
5. technique according to claim 4, it is characterized in that, the ram speed of described forcing press using 25~30mm/s as
Preferably.
6. technique according to claim 1, it is characterized in that, described cold-finishing processing refers to：Go after flash removed and with pressure
The impurity of contracting air clean workpiece surface and mould impression, and honing and ultrasonic polishing are carried out to finishing mold impression, make mould
Thorax surface roughness reaches Ra0.2；The depth of die cavity of finishing cavity plate is greater than the length of workpiece bar portion.
7. technique according to claim 4, it is characterized in that, aperture=2S=5mm of described die hole；Cavity plate and cylinder
Excessive radius of corner r=2mm between body opening.
8. technique according to claim 4, it is characterized in that, gap is between described punch-pin and cavity plate wall and support block
0.1mm。
9. technique according to claim 4, it is characterized in that, described pellet uses electroslag remelting H13 hot die steels, vacuum
46~49HRC of heat treatment hardness.
10. technique according to claim 4, it is characterized in that, the impression of described cavity plate uses roughing in electro-discharge machining
→ middle processing → multielectrode processing technology of semifinishing → finishing, the material selection copper-tungsten of electrode；Finishing is put
Electric gap is unilateral to be arranged to 0.015~0.02mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711089082.1A CN107695276A (en) | 2017-11-08 | 2017-11-08 | The new manufacturing process of spherical flange core axial workpiece and mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711089082.1A CN107695276A (en) | 2017-11-08 | 2017-11-08 | The new manufacturing process of spherical flange core axial workpiece and mould |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107695276A true CN107695276A (en) | 2018-02-16 |
Family
ID=61178313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711089082.1A Pending CN107695276A (en) | 2017-11-08 | 2017-11-08 | The new manufacturing process of spherical flange core axial workpiece and mould |
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| JP2005211929A (en) * | 2004-01-29 | 2005-08-11 | Sanyo Special Steel Co Ltd | Method for producing unit bearing having good material yield with horizontal type forging machine |
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| CN101389424A (en) * | 2006-02-27 | 2009-03-18 | 本田技研工业株式会社 | Process for manufacturing outer ring member for constant-velocity joint |
| CN202256074U (en) * | 2011-10-14 | 2012-05-30 | 上海工程技术大学 | Mould for carrying out steel metal cup drawing test on servo press |
| CN202316878U (en) * | 2011-11-23 | 2012-07-11 | 十堰园钧工贸有限公司 | Extrusion molding device for fork half shaft of automobile |
| CN202655473U (en) * | 2012-05-31 | 2013-01-09 | 李建明 | Primary-procedure stretching mold for cup shell |
| CN103192021A (en) * | 2013-04-12 | 2013-07-10 | 吴桥县华锋五金工具有限责任公司 | Flange shaft forging method |
| JP6197136B1 (en) * | 2017-04-03 | 2017-09-13 | マテック株式会社 | Method for manufacturing cup structure |
| CN107523761A (en) * | 2017-08-30 | 2017-12-29 | 宁波正凯机械有限公司 | The method that rzeppa joint is made using finish forge plastic forming technique |
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2017
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Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10257471A1 (en) * | 2002-12-09 | 2004-07-01 | New Form Tec Gmbh | Hollow object producing process for outer hub of constant-velocity ball joint involves producing pre-molded part with pockets in its walls |
| JP2005211929A (en) * | 2004-01-29 | 2005-08-11 | Sanyo Special Steel Co Ltd | Method for producing unit bearing having good material yield with horizontal type forging machine |
| JP2005246400A (en) * | 2004-03-02 | 2005-09-15 | Nissan Motor Co Ltd | Die apparatus for forging and forging method |
| CN1784278A (en) * | 2004-04-16 | 2006-06-07 | 株式会社博世汽车系统 | Molding method by forging and molding method for case |
| JP2007196259A (en) * | 2006-01-26 | 2007-08-09 | Nissan Motor Co Ltd | Forging apparatus and forging method |
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| CN202256074U (en) * | 2011-10-14 | 2012-05-30 | 上海工程技术大学 | Mould for carrying out steel metal cup drawing test on servo press |
| CN202316878U (en) * | 2011-11-23 | 2012-07-11 | 十堰园钧工贸有限公司 | Extrusion molding device for fork half shaft of automobile |
| CN202655473U (en) * | 2012-05-31 | 2013-01-09 | 李建明 | Primary-procedure stretching mold for cup shell |
| CN103192021A (en) * | 2013-04-12 | 2013-07-10 | 吴桥县华锋五金工具有限责任公司 | Flange shaft forging method |
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Application publication date: 20180216 |
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