CN109794535A - A kind of internal rolling manufacturing process - Google Patents
A kind of internal rolling manufacturing process Download PDFInfo
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- CN109794535A CN109794535A CN201711136817.1A CN201711136817A CN109794535A CN 109794535 A CN109794535 A CN 109794535A CN 201711136817 A CN201711136817 A CN 201711136817A CN 109794535 A CN109794535 A CN 109794535A
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Abstract
The present invention proposes a kind of internal rolling manufacturing process, using internal rolling technology combination spinning with tension technology, it solves by the introducing of spinning with tension using traditional inward turning pressing formation, workpiece is too long, outer surface of workpiece and mould contact surface product are excessive, the problem of frictional force is big, and workpiece can not demould realizes efficient, quick, accurate, the inexpensive forming of long cylinder.
Description
Technical field
The present invention relates to a kind of internal rolling manufacturing process, belong to spin forming technique field.
Background technique
Outside spinning is a kind of traditional spinning process technology, use outside spinning technology can it is long with production length, with additional
The tubular revolving parts of strengthening tendons, have it is high-efficient, hot spinning, the processable bent spies such as bus shape and conical part can be carried out
Point.But outside spinning die length requires to be longer than product length, manufacture difficulty is big, adjustment precision is low, high production cost, most heavy
It wants, the product using outer shear spinning process forming with interior modal circumferential stiffening rib must use valving die, every production one
Part product must dismount mold again, and production efficiency is extremely low, be not suitable for batch production, it is low to can no longer meet national defense industry product
The requirement of cost, high efficiency, high-precision, high quality.
Internal rolling technology is a kind of newer rotary pressure technology, can be produced using internal rolling technology with interior modal circumferential stiffening rib
Tubular revolving parts have the characteristics that Product Precision height, high yield rate, high production efficiency, have certain advance.But
It is that internal rolling technology mould length requirement is longer than product length, and manufacture difficulty is big, adjustment precision is low, high production cost, most important
, product of the production length within 1m is only capable of using this technique, if fruit product is too long, outer surface of workpiece and mould contact surface
Product is excessive, and frictional force is big, and workpiece will be unable to demould, the long tubular of large-diameter high-accuracy needed for can not being applied to national defense industry development
The production of part.
Existing internal rolling equipment is as shown in Figure 1, (wherein spinning machine lathe bed 01, core model 02, spinning roller 03, workpiece 04, balance
Take turns mechanism 05, screw 06, binder ring 07, spinning roller arm 08, lateral balladeur train 09) shown in, using lateral L-type cantilevered list spinning roller inward turning
Press mechanism, axis, the radial feed of spinning roller 03 drive the L-type spinning roller arm 08 being connected on it to drive in motor by lateral balladeur train 09
Dynamic lower whole axis moves radially realization, and spinning roller arm is too long, and single-wheel spinning is rigidly extremely low, cannot achieve automatic centering spinning, and
Spinning force is smaller, can not carry out the rotary pressing processing of heavy wall difficulty moulding material, be unable to satisfy the processing of high-precision product.
Summary of the invention
It is an object of the invention to overcome the shortage of prior art, a kind of high efficiency is provided, high-precision, low cost, can be made
With compared with becate shape core model can progressive forming longer dimension long tubular product internal rolling manufacturing process.
Technical solution of the invention: a kind of internal rolling manufacturing process is realized by following steps:
The first step, the blank of straight tubular construction of the processing one end with evagination technique ring；
Blank wall thickness t1 is calculated according to cylinder reduction and is determined, blank length is according to constant-volume principle and considers reserved work
Obtained by product COMPREHENSIVE CALCULATING, outer diameter φ D is determined skill surplus according to the swollen diameter rule of internal rolling.Specific design passes through following steps
It realizes:
A1.1, blank thickness t1 is determined according to cylinder reduction distribution principle,
Cylinder reduction distribution principle is no more than limit attenuating rate；
A1.2, the theoretical length L for determining blank,
According to the blank thickness t1 that final product structure and step A1.1 are determined, hair is obtained according to spinning constant-volume principle
Base theoretical length, evagination technique ring one end installation positioning surplus of blank, the other end reserve process allowance, prevent oral area deformation acute
Strong influence Product Precision；General installation positioning surplus is 40mm or so, and process allowance is 20~40mm.
A1.3, formula is utilizedDetermine blank outer diameter φ D, wherein Φ D1For the outer diameter of final products, ε
For the swollen mass runoff of spinning,For blank and die clearance, wherein the swollen mass runoff of spinning is related with material physical property, can be touched by test
Rope determines, and blank and die clearance generally take 0.4~0.6mm.
Processing: being processed into predetermined size, shape by method for turning for the seamless tubular goods purchased from producer, has evagination work
Skill ring one end requires connection ring two sides with respect to blank outer surface verticality with higher, other end outer circle can chamfering, just
It is installed in blank.
Blank machining-size, required precision can be as follows, are also adjusted according to specific needs:
Evagination technique ring thickness: generally 6mm；
Evagination technique ring outer diameter: blank outer diameter φ D+12mm
Evagination technique ring two sides are with respect to blank outer surface verticality: generally 0.1mm
Wall thickness tolerance: generally 0.2mm
Diameter tolerance: generally 0.3mm.
Second step, blank destressing processing；
Destressing treatment process is selected for specific material, the strength of materials is reduced, meets spinning requirement.
Third step determines spinning track,
Spinning track includes into revolving section, positioning section, cylinder section；
It is designed into rotation section, positioning section and cylinder section forming mode, designs reduction, the drafts of cylinder section spinning, is completed
Spinning Trajectory Design, determines forming process.
A3.1, enter to revolve section and shaped using common internal rolling mode, i.e., traction mechanism is motionless, and spinning roller is moved to major axes orientation；
The length and technique that enter to revolve section are the well-known technique of internal rolling technique, and following technique can also be used, and enter rotation point and answer
In mold and away from 5~10mm of die face, track form is long 15mm, and entering to spin up point drafts is -0.5mm, enters to revolve terminal
Reach the slope form of positioning section drafts；
A3.2, positioning section are shaped using common internal rolling mode；
The length and technique of positioning section are the well-known technique of internal rolling technique, and following technique, length 30mm, pressure can also be used
Lower amount is consistent with product first segment drafts, starts spinning with tension after the completion of positioning section spinning, i.e. spinning roller axial position is motionless,
Traction mechanism traction blank is moved along with main shaft opposite direction according to setting speed；
A3.3, cylinder section use straight path, and drafts is determined according to product thickness, spinning rebound amount, wherein spinning is anti-
Bullet amount passes through test and gropes to determine, cylinder segment length calculates gained by product according to constant-volume principle；
4th step, composite spinning,
Blank is installed, spinning program is designed based on spinning track, traction mechanism is moved to and has made a reservation for revolve position, is opened
Beginning spinning, based on spinning track work out spinning program make liftout, pre-rotation, along the movements such as desired trajectory spinning, stoppings oneself
It is dynamic to execute；
Specific spinning process is as follows:
A4.1, blank is mounted on the traction mechanism of spinning machine by binder ring, mold is mounted on mold transmission cylinder
Inner cavity front end, traction mechanism drive blank to be axially moved to mold；
Spinning blank is lifted between traction mechanism and mold, evagination technique ring is pressed on traction mechanism by binder ring
End face, blank is put into mold it is concordant with die face to blank axial centerline, pass through binder ring adjust blank axial position
And it is fixed, realize radial and axial positioning；
A4.2, it is manufactured into rotation section,
Traction mechanism is static, and rotary wheel mechanism is moved to major axes orientation, is manufactured into rotation section using inward turning technique；
A4.3, processing positioning section,
Traction mechanism is axially static, and rotary wheel mechanism is axially moved to major axes orientation, using inward turning technique according to final products
Structure processes positioning section；
Start spinning with tension after the completion of positioning section spinning, i.e. spinning roller axial position is motionless, and traction mechanism draws blank edge
It is moved with main shaft opposite direction according to setting speed.
A4.4, cylinder section processing,
Rotary wheel mechanism is axially static, and traction mechanism draws blank and is axially moved along with main shaft opposite direction, and spinning roller machine uses
Inward turning technique processes cylinder；
Spinning process realizes axial tensile force by traction mechanism traction blank, by the spinning roller radial feed being mounted on spinning roller arm
Realize internal rolling；Wherein traction mechanism blank installation position uses bearing, can contact in blank with mold after realizing blank installation
Frictional force effect under with mold rotation, while traction mechanism inner hollow passes through for spinning roller arm, real on same axis
Existing two kinds of axial movements；Traction mechanism by lead screw by be mounted on feed box servo motor driving, it can be achieved that axial position,
The accurate and PLC technology of movement velocity；And spinning roller arm is mounted on spinning roller arm seat, together by lead screw by being mounted on feeding
Servo motor on case drives the accurate and PLC technology, it can be achieved that axial position, movement velocity.
5th step carries out machine adduction heat treatment to the cylinder of the 4th step mould pressing.
Turnery processing: by product using outer diameter as benchmark centering after cut both ends surplus and carry out the special constructions such as hole, slot and add
Work makes product meet design requirement.
Heat treatment: removing Final Heat Treatment Process for the selection of specific material, guarantees that product condition of heat treatment meets design and wants
It asks.
The internal rolling equipment, including spindle box, mold transmission cylinder, rotary wheel mechanism, traction mechanism, binder ring and numerical control
Bed piece, rotary wheel mechanism include spinning roller head mechanism, spinning roller radial structure, spinning roller arm, spiral arm seat, axial feed structure, traction
Mechanism includes traction mechanism rotor, traction mechanism rotor bearing, traction mechanism seat, traction mechanism axial feed structure, mould
Tool transmission cylinder is mounted on main shaft of numerical control machine tool, and mold is mounted on mold transmission tube inner chamber front end, and traction mechanism rotor passes through
Traction mechanism rotor bearing is mounted in traction mechanism seat, and traction mechanism seat is mounted on the guide rail of numerically-controlled machine tool lathe bed, hair
Base is mounted on traction mechanism rotor by binder ring, and traction mechanism seat is realized axial by traction mechanism axial feed structure
Movement, spinning roller arm rear end and spiral arm seat are connected, front end and spinning roller head mechanism are connected, and spinning roller radial feed structure is mounted on spinning roller arm
In inner cavity, spinning roller head mechanism is connect with spinning roller radial feed structure, and spiral arm seat is mounted on the guide rail of numerically-controlled machine tool lathe bed, with axis
It is connected to feeding structure.
The spinning roller head mechanism is made of the circumferentially equally distributed spinning roller component of spinning roller head main body, drift and three groups, often
Group spinning roller component includes support rolling element, spinning roller, connecting rod and pitman shaft, and spinning roller head main body and the front end of spinning roller arm are connected, drift
It is triangular wedge structure for section, one end of connecting rod connect with support rolling element, the other end by pitman shaft is connected to spinning roller head
In main body, spinning roller is mounted in the middle part of connecting rod, and support rolling element is pressed on the inclined-plane of drift, drift rear end and spinning roller radial feed knot
Structure is connected.
The drift section is equilateral triangle, three vertex roundings.
Spring connects between adjacent links in the spinning roller head mechanism.
The axial feed structure includes axial feed lead screw and axial feed driving motor composition.
The traction mechanism axial feed structure includes traction mechanism axial feed lead screw and traction mechanism axial feed
Driving motor composition.
The spinning roller radial feed structure includes spinning roller radial feed screw and spinning roller radial feed driving motor composition.
The present invention compared with prior art the utility model has the advantages that
(1) present invention uses internal rolling technology combination spinning with tension technology, solves use by the introducing of spinning with tension
Traditional inward turning pressing formation, workpiece is too long, and outer surface of workpiece and mould contact surface product are excessive, and frictional force is big, and workpiece can not demould
The problem of, realize efficient, quick, accurate, the inexpensive forming of long cylinder；
(2) present invention realize using shorter cyclic annular core model can long cylindrical part within shaping length 2m, substantially drop
Low long barrel molds manufacture difficulty and manufacturing cost, avoid the problem that long mold stiffness is low, service precision is low, reduce mold
Resetting difficulty improves service precision, provides guarantee for forming high-precision product；
(3) present invention optimizes product straightness precision and circularity precision by spinning with tension, is optimized by internal rolling and is produced
Product diameter accuracy and wall thickness accuracy, and product overall precision is further improved by the raising of mould and die accuracy, to obtain
Higher than traditional internal rolling, the precision of outside spinning；
(4) of the invention may be implemented on same axis using spinning machine realizes two kinds of axial movements, is internal rolling, opens
Power spinning combination process using traction mechanism provide space, realize internal rolling traction mechanism and rotary wheel mechanism coaxial line and
Mutually indepedent movement, to realize that composite spinning technique provides guarantee；
(5) spinning machine of the present invention uses 120 ° of special symmetrical three spinning rollers structures, reaches 2m, strength in jib length
Spinning force reaches spinning roller head mechanism energy automatic centering in the case where more than ten tons and obtains the stress of balance, and spinning system greatly improved
System rigidity；
(6) the cluster type cantilever design that built-in radial drive system is used in spinning machine master-plan of the present invention, solves
Rotary wheel mechanism functional component is more, working space narrow problem；
(7) spinning machine of the present invention is cooperated using drift and spinning roller component, the axis of numerical control, radial motion will accurately can be converted
Spinning roller head radial motion, realize spinning roller radial feed can accurate numerical control, so that it is accurate in small space to realize spinning roller
Axis, radial motion conversion, meet the accurate control of spinning roller radial feeds；
(8) spinning machine of the present invention is integrally axially moved carrier as spinning roller head mechanism and spinning roller arm using rotary wheel base, can
It realizes the axial feed motion that digitlization accurately controls, realizes spinning roller axial direction, collection of the radial feed function on same mechanism
At to realize that axial feed provides guarantee in internal rolling technique.
Detailed description of the invention
Fig. 1 is existing internal rolling device structure schematic diagram；
Fig. 2 is preparation technology figure of the present invention；
Fig. 3 is blahk structure figure of the present invention；
Fig. 4 is spinning machine schematic diagram of the present invention；
Fig. 5 is rotary wheel mechanism structural schematic diagram of the present invention；
Fig. 6 is that rotary wheel mechanism of the present invention and traction mechanism cooperate schematic diagram；
Fig. 7 is spinning roller header structure schematic diagram of the present invention；
Fig. 8 is that drift of the present invention and spinning roller component cooperate schematic diagram；
Fig. 9 is spinning track schematic diagram of the present invention.
Specific embodiment
Below with reference to specific example and attached drawing, the present invention is described in detail.
Process cylinder product, factory length 1300mm, with a thickness of 10mm, outer diameter 550mm, technique ring outer diameter is
562mm, material are 5A06 aluminium alloy.
Processing technology by following steps as shown in Fig. 2, realized:
1, Blank Design
By spinning blank 5 be designed as one end as shown in Figure 3 have evagination technique ring straight tubular construction, wall thickness t1 according to
It calculates and determines according to reinforcing rib section and covering section reduction, 5 length of blank is according to constant-volume principle and considers reserved process allowance
Obtained by product COMPREHENSIVE CALCULATING, outer diameter φ D is determined according to the swollen diameter rule of internal rolling.Detailed process is as follows:
(1) determine that cylinder section reduction distributes, distribution principle is no more than limit attenuating rate.It can according to product final thickness
Know, limit attenuating rate is within 40% when 5A06 aluminium alloy inward turning, and swollen diameter fitting may be implemented 10% or more in drafts
Mold, thus cylinder section reduction 34.8% is designed, determine that 5 thickness t1 of blank is 11.5mm, meets reduction distribution principle；
(2) according to final product structure and the blank thickness t1 having determined, hair is calculated according to spinning constant-volume principle
5 theoretical length of base is 1000mm, evagination technique ring one end need to reserve 40mm length surplus for install positioning, the other end need to reserve
20-40mm process allowance prevents oral area from deforming dramatic impact Product Precision, thus determines that blank length L is 1080mm, in addition outer
Convex technique ring length, 5 overall length of blank are 1086mm.
(3) 5 outer diameter φ D of blank is mainly true by product outer diameter, spinning is swollen mass runoff, blank 5 and three, 3 gap of mold parameter
Fixed, wherein the swollen mass runoff of spinning is related with material physical property, gropes to determine that knowing is 0.3mm by test, and blank 5 and mold
3 gaps take 0.4mm, therefore 5 outer diameter φ D of blank is designed as 549.3mm.
(4) blank is processed: the seamless tubular goods purchased from producer is processed into predetermined size, shape, band by method for turning
There is evagination technique ring one end that connection ring two sides is required to all have higher level degree precision, other end outer circle falls 2 × 30 ° of chamferings,
Convenient for blank installation.
5 processing dimension of blank, required precision are as follows:
Evagination technique ring thickness: 6mm；
Evagination technique ring outer diameter: blank outer diameter φ D+12mm
Evagination technique ring two sides flatness: 0.1mm
Wall thickness tolerance: 0.2mm；
Diameter tolerance: 0.3mm；
2, destressing is handled
Specification is handled according to aluminum alloy heat, blank 5 is heat-treated using following heat treating regime, with drop
5 intensity of blank, meets spinning requirement:
Equipment for Heating Processing: aluminium alloy heating treatmentfurnace, temperature-controlled precision are not more than ± 5mm；
Heating mode: it heats up with furnace；
Holding temperature: 320 DEG C；
Soaking time: 1.5h；
The type of cooling: it comes out of the stove after cooling to 260 DEG C with the furnace.
3, spinning Trajectory Design
Spinning track as shown in Figure 9 is designed, including enters to revolve section 501, positioning section 502 and cylinder section 503, designs each section of rotation
Reduction, the drafts of pressure complete spinning Trajectory Design, determine forming process.
Detailed process is as follows:
(1) enter to revolve section 501 to shape using internal rolling mode, i.e., traction mechanism is motionless, and spinning roller is moved to major axes orientation, enters
For rotation point in mold and away from die face 10mm, track form is long 15mm, and entering to spin up point drafts is -0.5mm, enters to revolve terminal
Reach the slope form of positioning section drafts；
(2) positioning section 502 is shaped using internal rolling mode, and length 30mm, drafts is consistent with 503 drafts of cylinder section,
Start spinning with tension after the completion of positioning section spinning, i.e. spinning roller axial position is motionless, and traction mechanism draws blank edge and main shaft phase
Opposite direction is moved according to setting speed；
(3) cylinder section 503 uses straight path, and drafts is determined according to product thickness, spinning rebound amount, wherein spinning
Rebound amount is groped to be determined as 0.2mm by test, and pressure measures 4.2mm, and 503 length of cylinder section is according to constant-volume principle by producing
Product calculate gained.
4, composite spinning
The blank 5 handled according to step 2 destressing is installed on spinning machine, the spinning determined according to step 3
Track carries out composite spinning.
Spinning machine is as shown in figure 4, include spindle box 1, mold transmission cylinder 2, rotary wheel mechanism, traction mechanism 9, binder ring 10
With numerical control bed piece 11, mold transmission cylinder 2 is mounted on main shaft of numerical control machine tool, before mold 3 is mounted on 2 inner cavity of mold transmission cylinder
End, rotary wheel mechanism, traction mechanism 9 are mounted on numerically-controlled machine tool lathe bed 11.
Traction mechanism 9 is as shown in fig. 6, include traction mechanism rotor 901, traction mechanism rotor bearing 902, dragger
Structure seat 903, traction mechanism axial feed lead screw 904 and traction mechanism axial feed driving motor 905, traction mechanism rotor
901 are mounted in traction mechanism seat 903 by traction mechanism rotor bearing 902, and traction mechanism seat 903 is mounted on numerically-controlled machine tool
On the guide rail of lathe bed 11, blank 5 is mounted on traction mechanism rotor 901 by binder ring 10, and traction mechanism seat 903 is by leading
Draw mechanism axial direction feed screw 904 and traction mechanism axial feed driving motor 905 is realized and is axially moved.
Rotary wheel mechanism is as shown in Figure 5,6, including spinning roller head mechanism 4, spinning roller radial feed screw 12, spinning roller radial feed drive
Dynamic motor 13, spinning roller arm 6, spiral arm seat 7, axial feed lead screw 14, feed box 8 and axial feed driving motor 15, feed box 8 are solid
Be scheduled on 11 tail end of numerically-controlled machine tool lathe bed, inside axial feed driving motor 15 is installed, center line and machine tool chief axis center
Line is overlapped；Spiral arm seat 7 is mounted on the guide rail of numerically-controlled machine tool lathe bed 11, and center line is overlapped with machine tool chief axis center line, is passed through
Axial feed lead screw 14 is connected with feed box 8, spiral arm seat 7 can be made to make speed, position by numerical control programming driving axial feed screw 14
Set the axial feed motion accurately controlled；Spinning roller arm 6 is fixed by screws in spiral arm seat 7, in center line and machine tool chief axis
Heart line is overlapped, and is divided into several segments, is connected by screw bolts, inner hollow, for placing spinning roller radial feed driving motor 13,
And it can the demolition and maintenance at segmentation；Spinning roller radial feed driving motor 13 is fixed on 6 inner cavity of spinning roller arm close to spinning roller head mechanism 4 one
End；12 one end of spinning roller radial feed screw and spinning roller head mechanism 4 are connected, and the other end is pacified by spinning roller radial feed driving motor 13
Mounted in 6 inner cavity of spinning roller arm, spinning roller radial feed screw 12 can be driven to move by numerical control programming.
Spinning roller head mechanism 4 is as shown in fig. 7, by three groups of circumferentially equally distributed spinning roller components, spinning roller head main body 406 and drift
401 compositions, every group of spinning roller component include support rolling element 402, spinning roller 403, connecting rod 404 and pitman shaft 405, spinning roller head main body
406 are connected by screw and spinning roller arm 6, and spinning roller 403 is connected in spinning roller head main body 406 by connecting rod 404 and pitman shaft 405,
Spring is connected between adjacent links 404, effect is that spinning roller is made to keep tightening in nature；Spinning roller radial feed screw 12
It is connect with 401 one end of drift.Connecting rod 404 is three-link structure, will for connecting support rolling element 402 and spinning roller head main body 406
The axial movement of drift 401 passes to spinning roller 403.
For drift 401 as shown in figure 8, section is the triangular wedge structure of equilateral triangle, three vertex roundings effectively prevent phase
Movement interference between neighbour's support rolling element 402, drift 401 are placed between the inside of spinning roller head main body 406, three connecting rods,
It is connected by spinning roller radial feed screw 12 with the servo motor being placed on inside spiral arm, servo motor drives lead screw rotation,
And then drift 10 is driven to be axially moved；And when the axial movement of drift 401, the support that 3 inclined-planes are connect with 404 front end of connecting rod rolls
The radial motion of spinning roller 403 is realized in the contact of body 402, can between the amount of axial movement of drift 401 and the radial feeds of spinning roller 403
It by mathematical computations, the proportionate relationship of Cheng Yiding, and is reflected in numerical control program control, realizing 403 radial feed of spinning roller can
Numerical control programming control.
Spinning process draws blank 5 by traction mechanism 9 and realizes axial tensile force, real by the spinning roller 403 being mounted on spinning roller arm 6
Existing internal rolling；Wherein 5 installation position of blank uses bearing on traction mechanism 9, and realizing can be in blank 5 and mold 3 after blank 5 is installed
It is rotated under the frictional force effect of contact with mold 3, while 9 inner hollow of traction mechanism passes through for spinning roller arm 6, in same axis
Two kinds of axial movements are realized on line；Traction mechanism 9 by lead screw by be mounted on feed box 8 servo motor driving, it can be achieved that
The accurate and PLC technology of axial position, movement velocity；And spinning roller arm 6 is mounted on spinning roller arm seat 7, together by lead screw by
The servo motor being mounted on feed box 8 drives the accurate and PLC technology, it can be achieved that axial position, movement velocity.
When work, by blank 5 by binder ring 10, it is pressed on traction mechanism 9 by screw connection manner, is with spinning track
Traction mechanism 9 is moved to and has made a reservation for revolve position, starts spinning by basic engineering spinning program.Spinning program finishes execution, by work
Part removes.
Detailed process is as follows:
(1) evagination technique ring is pressed on dragger by binder ring 10 between traction mechanism 9 and mold 3 by the lifting of blank 5
9 end face of structure, blank 5 is put into mold 3 it is concordant with die face to 5 axial centerline of blank, pass through binder ring 10 adjust blank
Radial and axial positioning is realized in axial position and fixation；
(2) press track based on establishment spinning program make liftout, pre-rotation, along the movements such as desired trajectory spinning, stoppings oneself
Dynamic to execute, basic technological parameters are as follows:
The speed of mainshaft: 100r/min；
Enter to revolve section inward turning feed speed: 60mm/min；
Positioning section inward turning feed speed: 80mm/min；
Hauling speed: 80mm/min.
(3) spinning program starts spinning；
(4) it is finished, hangs tight product with crane, dismantle binder ring 10, dismantle product.
5, it processes
By product using outer diameter as benchmark centering after cut both ends surplus, so that product is met design requirement.
6, it is heat-treated
Specification is handled according to aluminum alloy heat, blank 5 is heat-treated using following heat treating regime, with drop
5 intensity of blank, meets spinning requirement:
Equipment for Heating Processing: aluminium alloy heating treatmentfurnace, temperature-controlled precision are not more than ± 5mm；
Heating mode: it heats up with furnace；
Holding temperature: 320 DEG C；
Soaking time: 1.5h；
The type of cooling: it comes out of the stove after cooling to 260 DEG C with the furnace.
Unspecified part of the present invention is known to the skilled person technology.
Claims (9)
1. a kind of internal rolling manufacturing process, which is characterized in that realized by following steps:
The first step, the blank of straight tubular construction of the processing one end with evagination technique ring；
Second step, blank destressing processing；
Third step determines spinning track,
Spinning track includes into revolving section, positioning section and cylinder section；
4th step, composite spinning,
A4.1, the blank handled through second step is installed on spinning machine,
The spinning machine includes spindle box (1), mold transmission cylinder (2), rotary wheel mechanism, traction mechanism (9), binder ring (10)
With numerical control bed piece (11), blank (5) is mounted on traction mechanism (9) by binder ring (10), and mold (3) is mounted on mold
Transmission cylinder (2) inner cavity front end, traction mechanism (9) drive blank to be axially moved to mold；
A4.2, it is manufactured into rotation section,
Traction mechanism is axially static, and rotary wheel mechanism is moved to major axes orientation, is manufactured into rotation section using inward turning technique；
A4.3, processing positioning section,
Traction mechanism is axially static, and rotary wheel mechanism is axially moved to major axes orientation, using inward turning technique according to cylinder final products
Structure processes positioning section；
A4.4, cylinder section processing,
Rotary wheel mechanism is axially static, and traction mechanism draws blank and is axially moved along with main shaft opposite direction, and spinning roller machine uses inward turning
Technique and spinning with tension technique process cylinder section；
5th step carries out machine adduction heat treatment to the cylinder of the 4th step mould pressing.
2. a kind of internal rolling manufacturing process according to claim 1, it is characterised in that: blahk structure is logical in the first step
Cross following steps realization:
A1.1, determine blank thickness t1 according to cylinder section reduction distribution principle, cylinder section reduction distribution principle be no more than
Limit attenuating rate；
A1.2, the theoretical length L for determining blank,
According to the blank thickness t1 that cylinder final product structure and step A1.1 are determined, hair is obtained according to spinning constant-volume principle
Base theoretical length, the reserved installation positioning surplus in evagination technique ring one end of blank, the other end reserve process allowance；
A1.3, formula is utilizedDetermine blank outer diameter φ D, wherein Φ D1For the outer diameter of cylinder final products, ε
For the swollen mass runoff of spinning,For blank and die clearance.
3. a kind of internal rolling manufacturing process according to claim 1, it is characterised in that: spinning roller machine described in step A4.1
Structure includes spinning roller head mechanism (4), spinning roller radial feed structure, spinning roller arm (6), spiral arm seat (7) and axial feed structure, dragger
Structure (9) includes traction mechanism rotor (901), traction mechanism rotor bearing (902), traction mechanism seat (903), traction mechanism
Axial feed structure, mold transmission cylinder (2) are mounted on main shaft of numerical control machine tool, and mold (3) is mounted on mold transmission cylinder (2) inner cavity
Front end, traction mechanism rotor (901) are mounted in traction mechanism seat (903) by traction mechanism rotor bearing (902), are led
Draw mechanism seat (903) to be mounted on numerically-controlled machine tool lathe bed (11), blank (5) is mounted on traction mechanism rotation by binder ring (10)
On body (901), traction mechanism seat (903) by traction mechanism axial feed structure realize be axially moved, spinning roller arm (6) rear end with
Spiral arm seat (7) is connected, front end and spinning roller head mechanism (4) are connected, and spinning roller radial feed structure is mounted in spinning roller arm (6) inner cavity,
Spinning roller head mechanism (4) is connect with spinning roller radial feed structure, and spiral arm seat (7) is mounted on numerically-controlled machine tool lathe bed (11), with axial direction
Feeding structure connection.
4. a kind of internal rolling manufacturing process according to claim 3, it is characterised in that: the spinning roller head mechanism (4) by
The circumferentially equally distributed spinning roller component composition of drift (401), spinning roller head main body (406) and three groups, every group of spinning roller component includes branch
Support rolling element (402), spinning roller (403), connecting rod (404) and pitman shaft (405), spinning roller head main body (406) with before spinning roller arm (6)
End is connected, and drift (401) is that section is triangular wedge structure, and one end of connecting rod (404) connect with support rolling element (402), is another
One end is connected in spinning roller head main body (406) by pitman shaft (405), and spinning roller (403) is mounted in the middle part of connecting rod (404), support
Rolling element (402) is pressed on the inclined-plane of drift (401), and drift (401) rear end and spinning roller radial feed structure are connected.
5. a kind of internal rolling manufacturing process according to claim 3, it is characterised in that: described drift (401) section is
Equilateral triangle, three vertex roundings.
6. a kind of internal rolling manufacturing process according to claim 3, it is characterised in that: in the spinning roller head mechanism (4)
Spring connects between adjacent links (404).
7. a kind of internal rolling manufacturing process according to claim 3, it is characterised in that: the axial feed structure includes
Axial feed lead screw (14) and axial feed driving motor (15).
8. a kind of internal rolling manufacturing process according to claim 3, it is characterised in that: the traction mechanism axial feed
Structure includes traction mechanism axial feed lead screw (904) and traction mechanism axial feed driving motor (905).
9. a kind of internal rolling manufacturing process according to claim 3, it is characterised in that: the spinning roller radial feed structure
Including spinning roller radial feed screw (12) and spinning roller radial feed driving motor (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN113042560A (en) * | 2021-03-16 | 2021-06-29 | 西北工业大学 | Metal cylindrical part inner rolling extrusion forming device and forming method |
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