CN104858284B - Forward-spinning spinning method - Google Patents
Forward-spinning spinning method Download PDFInfo
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- CN104858284B CN104858284B CN201510245570.1A CN201510245570A CN104858284B CN 104858284 B CN104858284 B CN 104858284B CN 201510245570 A CN201510245570 A CN 201510245570A CN 104858284 B CN104858284 B CN 104858284B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/14—Spinning
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Abstract
The invention provides a forward-spinning spinning method. The outside spinning technology is combined with synchronous rotation, a short core mold, tension spinning and other technologies to achieve integral spinning forming of super-long thin-wall cylindrical parts, and therefore the technical problem that the common outside spinning technological method cannot be used for spinning the super-long thin-wall cylindrical parts is solved. According to the forward-spinning spinning method, the function of synchronous rotation of the two ends of workpieces is increased, the problem of torsional deformation of the super-long thin-wall cylindrical parts is solved, and therefore the precision of products is improved; the short core mold is adopted, so that the problems that core molds of the super-long thin-wall cylindrical parts lower heads and vibrate, the manufacturing cost is high, and demolding is difficult are solved. According to the forward-spinning spinning method, longitudinal drawing tension movement of the workpieces is increased, so that the super-long cylindrical parts are subjected to longitudinal force in the spinning process, the deforming and flowing of materials are facilitated, the problem that the ultra-long cylindrical parts bend and deform is solved, the product precision is improved, and integral spinning forming of the ultra-long thin-wall cylindrical parts is achieved.
Description
Technical field
The present invention relates to a kind of dextrorotation spin-on process, belongs to metal pipe material pressure processing technology field.
Background technology
Three spinning roller strength outside spinnings are current topmost thin-wall tube-shaped element manufacturing process, have spinning tonnage big, three rotations
Wheel can automatic centering, the features such as spinning Product Precision is high, be widely used in Thin-wall cylindrical part, with outer modal circumferential stiffening rib and little
The mould pressing of cone angle part.The characteristics of due to rotary wheel mechanism structure and function, in spinning overlength (more than 10 meters of length) thin-walled
During cylindrical member, core is it is necessary to have sufficient intensity, rigidity and surface quality, more than 10 meters of core manufacture difficulty, in spinning mistake
Occur that the ultralong thin walled barrel type part demoulding is difficult in journey and spin-forming procedure in mould is bowed, ultralong thin walled barrel type part is in spinning mistake
One end transmitting torque causes workpiece torsional deflection, ultralong thin walled barrel type part length long because the reasons such as deadweight produce bending in journey
Deformation, and material flow during rotary pressure deformation it is not smooth, swell before spinning roller and excessive drop off, Product Precision is reduced etc. occur
Problem.Existing cold-drawing technology can produce more than 10 meters of tubing, but its wall thickness is big, evenness of wall thickness is poor, circularity and linearity etc.
Form and position tolerance is difficult to control to；The existing cold rolling tubing for only producing difficult-to-machine material of the diameter less than 200 millimeters, high precision but efficiency
It is low.
The problems such as to solve a ultralong thin walled barrel type part spinning process core mould manufacture difficult problem, demoulding difficulty, Xiao Zuoyi exists《Pipe
Shape part shear spinning new technique --- floating core modulus method》Propose to adopt floating core die in (forging technology the 5th phase in 1999), float
Core is shorter, adopts the stepped cylindrical structure with the shaft shoulder, floating core die to be placed on inside spinning blank, and core is axially being rubbed
The axial thrust that spinning roller suffered by power and the shaft shoulder is applied, due to the effect of the axial thrust that spinning roller suffered by the shaft shoulder is applied,
Make core constantly travel forward in spinning process, be relatively fixed with spinning roller position, keep the seriality of deformation.But this structure
The floating core die of form, the internal diameter of spinning blank will accommodate the shaft shoulder, and rotary pressing processing amount is big；Simultaneously in spinning, floating core die turns
Moving may be not coaxial with spinning blank, makes spinning blank lengthwise movement be obstructed and tube wall thickness is uneven.
For solve material flow during rotary pressure deformation it is not smooth, the problems such as swelling excessive before spinning roller, Ma Shicheng et al.
Propose a kind of thinking for applying tension in tubular member free end；《The new spinning machine of high accuracy pole thin-walled cylindrical workpiece》In carry
To a kind of spinning with tension machine, tension force is applied by hydraulic test in tubular member free end.But this mode direction of pull is fixed not
Adjustable, according to hydraulic test, when long pipe part is processed, hydraulic test is excessively huge.
In a word, the function restriction and process of existing spinning machine is difficult to rotation ultralong thin walled barrel type part processed (more than 5
Rice), it is impossible to meet national defense industry and other civilian industry low cost, high efficiency, high accuracy, high-quality product requirements.
The content of the invention
It is an object of the invention to overcome prior art not enough, there is provided a kind of high precision, high yield rate, production efficiency are high
Dextrorotation spin-on process.
The technical solution of the present invention：A kind of dextrorotation spin-on process, comprises the following steps：
The first step, spinning blank prepares,
The spinning blank of straight tubular construction of the processing two ends with keyway；
The concrete size of spinning blank is set as techniques well known, and content refers to the old of National Defense Industry Press's publication
State and first wait work《Shear spinning technique and equipment》, it is specific as follows：
(1) spinning blank wall thickness t is determined1
According to the spinning force size of spinning machine, subtract according to the wall thickness requirement of spinning product, the limit of the material of institute's spinning
Thin rate, arrangement of spinning pass etc. calculate the wall thickness t of spinning blank1。
(2) the theoretical length L of blank is determined1
Length, wall thickness and spinning blank wall thickness t identified above according to long tubular workpiece final product structure1, foundation
Flow formed part equal-volume principle is calculated blank theoretical length, and considers that spinning blank two ends are reserved more than the technique for installing positioning
Amount determines the theoretical length L of blank1。
(3) the external diameter Φ D of spinning blank are determined2And internal diameter Φ D1
According to the external diameter of the short core of fixation, it is considered to the requirement that spinning blank passes through the short core of fixation, increase surplus.Spinning hair
Base internal diameter Φ D1Usually fix the external diameter Φ D of short core0The surplus of+0.3mm or so；Spinning blank external diameter Φ D2Usually revolve
Dabbing base internal diameter Φ D1+2t1.The external diameter Φ D of the short core of fixation0Determination, according to long tubular workpiece final product structure internal diameter
Consider that usually the internal diameter of final product structure deducts the mass runoff that rises of diameter with the mass runoff that rises of diameter after spinning.
Second step, spinning machine prepares,
Described spinning machine includes lathe bed, longitudinal feed mechanism, the short core of fixation and rotary wheel mechanism, described spinning roller machine
Structure includes spinning roller and spinning roller transverse feed mechanism, and spinning roller is fixed on lathe bed by spinning roller transverse feed mechanism, and lengthwise position is solid
Fixed, the short core of fixation is vertically fixed in spinning roller position by core pull bar, and described longitudinal feed mechanism is structure identical two
Set, is separately mounted to the two ends of rotary wheel mechanism, and described longitudinal feed mechanism includes upper leading screw, upper screw, lower leading screw, lower silk
Mother, main spindle box, main shaft, spindle drive motor and connector, main shaft and spindle drive motor be arranged on main spindle box in, upper screw and
Lower screw is fixedly connected respectively with main spindle box, and upper screw and lower screw are respectively equipped with a length feed motor, the end peace of main shaft
Load junctor；
The short core of the fixation includes core mandrel, core end cap, conical bearing and core body, and core mandrel penetrates core
Inside mould body, rolled with core body by the conical bearing at two ends and coordinated, core mandrel one end is fixed with core pull bar and connected
Connect, core end cap is arranged on core body end, and conical bearing is sealed in the oil storage formed by core mandrel and core body
Intracavity.
The upper leading screw and lower leading screw are in diagonal layout on main spindle box.
3rd step, rotary pressure process parameter is selected, and determines spinning program；
Rotary pressure process parameter selects to include that spinning pass, reduction, roller working radius, feed rate, spinning roller are wrong away from amount, master
(rotary pressure process parameter selects to be known in the art technology rotating speed etc., and particular content refers to the old of National Defense Industry Press's publication
State and first wait work《Shear spinning technique and equipment》), spinning program is worked out based on rotary pressure process parameter and track.
4th step, spinning blank is installed,
A4.1, spinning blank are placed in the support meanss of spinning machine by lifting device；
A4.2, the longitudinal feed mechanism that will be far from core pull bar are fixedly connected with one end of spinning blank, length feed machine
Structure drives spinning blank to move through the short core of fixation；
A4.3, the movement of another set of longitudinal feed mechanism, are fixedly connected with the other end of spinning blank, and support meanss fall；
5th step, the spinning program set according to the 3rd step carries out spinning,
A5.1, determine active longitudinal feed mechanism, it is another set of for driven longitudinal feed mechanism；
The determination of the dynamic longitudinal feed mechanism of principal and subordinate sets according to spinning process needs, mainly by the direction of length feed,
Spinning determined using the factor such as dextrorotation or derotation, wherein it is a set of for active longitudinal feed mechanism, it is another set of just to enter for driven longitudinal direction
To mechanism, spinning process needs the dynamic longitudinal feed mechanism of change principal and subordinate flexibly to exchange.
A5.2, principal and subordinate move the main shaft drives spinning blank synchronous rotary of longitudinal feed mechanism and vertically move, and make spinning hair
Longitudinal original position of base to spinning procedure stipulation, spinning roller transverse feed mechanism drives spinning roller to be fed into the horizontal stroke of spinning procedure stipulation
To in original position；
A5.3, the spinning blank synchronous rotary under driving and driven main shaft drives, spinning blank is in rotary course by actively indulging
Length feed is driven to feed mechanism, spinning roller lengthwise position is fixed, during active longitudinal feed mechanism length feed, actively longitudinal direction is entered
Identical with material flow direction during spinning blank spinning to the length feed direction of mechanism, driven longitudinal feed mechanism speed is automatic
Adaptation follows active longitudinal feed mechanism to vertically move, while it is in opposite direction with length feed to be applied to the driven one end of spinning blank
Identical tension；
The length feed motor of driven longitudinal feed mechanism is operated under permanent moment of torsion maximum (top) speed mode of operation, realizes speed
Automatically adapt to follow active longitudinal feed mechanism to vertically move, while being applied to the driven one end of spinning blank and length feed direction
Contrary identical tension.The speed of driven longitudinal feed mechanism is set as the speed highest of length feed motor by digital control system, one
As be more than operating rate an order of magnitude, disclosure satisfy that the demand of speed adaptive；Driven longitudinal feed mechanism realizes that tension force revolves
Length feed motor is set as permanent moment of torsion by pressure, digital control system, and the driven one end for making spinning blank is received and length feed direction phase
Anti- identical tension.The identical tension size that driven longitudinal feed mechanism applies sets according to technological requirement, permanent less than active centripetal force
Tension force optimum range is σ1=0.1 σ2~0.5 σ2, σ2For the yield strength of spinning blank material.
A5.4, the short core of fixation rotate in the presence of the horizontal spinning force of spinning roller, and spinning blank is rotated while indulging
To the gap being moved through between spinning roller and the short core of fixation, the spinning of a passage of workpiece is realized；
A5.5, sofening treatment will be carried out after the workpiece of a passage spinning is unloaded；
The sofening treatment of workpiece is the hardness for reducing material, increases plasticity, and typically using heat treatment, sofening treatment is ability
Domain known technology, the temperature of concrete heat treatment is determined by material category.
6th step, repeats the 4th step and the 5th step until completing the spinning of all passages.
Present invention beneficial effect compared with prior art：
(1) outside spinning technology of the present invention is using synchronous rotary, short core (core is very short and longitudinally fixed), the rotation of dextrorotation tension force
Pressure technology, meets the high integral spinning forming of ultralong thin walled cylinder high precision, high yield rate, production efficiency；
(2) present invention adopts two sets of longitudinal feed mechanisms of structure identical, spinning with tension can be very easily realized, while root
According to spinning process and production requirement, principal and subordinate's feed mechanism can flexibly set, so that the identical tension side that driven feed mechanism applies
To flexibly change；
(3) present invention adopts spinning blank synchronous rotary technique in two ends in longitudinal movement, reduces long tubular
Part torsional deflection, improves the precision of product；
(4) core that the present invention is adopted is very short and longitudinally fixed, under spinning force effect, using conical bearing core is realized
Body with spinning blank synchronous rotary, solve a great diameter and long thin-wall tube-shaped element spinning mandrel manufacture difficult problem, the demoulding it is difficult and
The problems such as mould is bowed, vibrates in spin-forming procedure, it is to avoid long mold stiffness is low, external reinforcing ribs in service precision low impact
The problem of axiality, reduces mould resetting difficulty, improves service precision, provides guarantee to shape high-precision product, together
When avoid using existing floating core die, the uneven defect of retard motion and tube wall thickness when spinning blank is vertically moved,
Gap is less between spinning process SMIS mould body and spinning blank, and the circumferential processing capacity of spinning blank is little, is mould pressing
High-precision product is provided and ensured；
(5) tension function by increased driven longitudinal feed mechanism of the invention, realizes flow formed part in spinning mistake
All the time the effect of a longitudinal tension force is born in journey, ultralong thin walled barrel type part length is solved long because the reasons such as deadweight are produced
Flexural deformation, material flow during rotary pressure deformation it is not smooth, swell before spinning roller and excessive drop off, Product Precision is reduced etc. occur
Problem, improves the precision of product；
(6) present invention realizes vertically moving using screw, screw structure, and simple structure, the leading screw of longitudinal feed mechanism exists
Arranged using double lead-screw diagonal on main spindle box, the problems such as creeping under the disturbing moment of elimination main spindle box and heavy duty；
(7) present invention can be used for Thin-walled Straight cylindrical work pieces, with the ultralong thin walled cylinder of outer modal circumferential stiffening rib and small-angle thin-walled
Cylinder mould pressing, combination property is good, and forming accuracy is high, low cost, it is to avoid ultralong thin walled part solder design deformation etc.
Technical barrier.
Figure of description
Fig. 1 is spinning machine topology layout schematic diagram of the present invention；
Fig. 2 is spinning machine longitudinal feed mechanism structural representation of the present invention；
Fig. 3 is Fig. 2 B-B directions view of the present invention；
Fig. 4 is rotary pressing processing schematic diagram of the present invention；
Fig. 5 is that spinning machine of the present invention fixes short core mold structure schematic diagram；
Fig. 6 is present invention process flow chart；
Fig. 7 is spinning blank front view of the present invention；
Fig. 8 is spinning blank side view of the present invention.
Specific embodiment
Below in conjunction with accompanying drawing and instantiation, the present invention is described in detail.
Processing super long thin-wall tube-shaped element, its wall thickness 5mm, factory length L be 8000mm, product external diameter φ D be 504mm, material
Expect for 0Cr18Ni9 stainless steel alloys.
Preparation process by following steps as shown in fig. 6, realized：
1st, spinning blank is prepared
(1) Blank Design
It is straight tubular construction as shown in Figure 7,8 by spinning Blank Design, its wall thickness t1According to the spinning force of spinning machine
Size, wall thickness requirement, the limit attenuating rate of the material of institute's spinning, design of spinning pass of spinning product etc. calculate spinning blank
Wall thickness t1, blank length L1According to equal-volume computational methods and obtained by the reserved process allowance COMPREHENSIVE CALCULATING of consideration, the wall of its blank
Thick t1=23mm, internal diameter Φ D1It is designed as 494mm, external diameter Φ D2It is designed as 540mm, length L1For 1960mm, two ends process allowance
Respectively 80mm.
(2) spinning blank processing
By the seamless tubular goods purchased from producer according to the spinning blank requirement of design, requirement is processed into by method for turning
Size, shape, inner circle falls 2 × 30 ° of chamferings, is easy to blank to install, the circumferential uniform some installing holes 81 in spinning blank two ends, is used for
It is connected with connector.
Spinning blank machining-size, required precision are as follows：
Blank thickness：23mm
Blank external diameter：540mm
Blank internal diameter：494mm
Blank length：1960mm
Blank both sides flatness：≤0.2mm
Wall thickness tolerance：≤0.2mm
Diameter tolerance：≤0.3mm.
Two ends keyway：Per the arc keyway of one end 4, long 50mm, wide 20mm, deep 23mm.
2nd, spinning machine prepares
Spinning machine used herein is as shown in figure 1, including lathe bed 11, rotary wheel mechanism, support meanss 7, length feed
Mechanism and the short core 12 of fixation, rotary wheel mechanism includes spinning roller 9 and spinning roller transverse feed mechanism 10, and spinning roller 9 is laterally entered by spinning roller
It is fixed on lathe bed 11 to mechanism 10, lengthwise position is fixed, the short core 12 of fixation is pierced in spinning blank 8, by core pull bar 4
The position of spinning roller 9 is vertically fixed in, the short core 12 of fixation and spinning roller 9 are constant in spinning process lengthwise position.
The various mechanical parts of the arrangement connection above of lathe bed 11 and guide rail, bearing various force and works can realize, the portion such as main spindle box
Movement of the part on its guide rail, another aspect lathe bed is connected by fang bolt and ground, improves system stiffness.Lathe bed 11 is casting
Make or welding structure, it is contemplated that the problems such as manufacture, transport, multistage processing can be divided into and be finally rigidly connected and formed.
Support meanss 7 support the short core 12 of fixation and spinning blank 8 to load and unload, and lift and are driven by hydraulic jack.Spinning roller is horizontal
Feed servo-system drives the three 120 ° uniform traverse feeds of spinning roller 9, with the mutual interpolation of longitudinal feed mechanism, forms spinning roller
Processing trace curve.Spinning roller traverse feed servosystem drives three 120 ° of uniform oil cylinders, oil cylinder using electrohydraudic servomechanism
Bar is fixed, and cylinder body movement promotes gliding mass and rotary wheel base transverse shifting, grating scale detection feedback to constitute closed-loop control system.Work as rotation
Dabbing base 8 is rotated while when moving longitudinally through the gap of the setting between spinning roller 9 and the short core 12 of fixation, spinning blank
8 wall thickness are thinned, length elongation, realize the mould pressing of spinning blank 8, as shown in Figure 4.
Longitudinal feed mechanism is two sets of structure identical, is respectively mounted the two ends of rotary wheel mechanism, wherein a set of indulge for active
Another set of for driven longitudinal feed mechanism to feed mechanism, the determination that principal and subordinate moves is determined according to technique, active longitudinal feed mechanism
The blank movement of drive spinning is vertically moved, by technique initialization, driven longitudinal feeding device must follow mobile and speed to moving direction
Degree self adaptation.
During spinning, active longitudinal feed mechanism is vertically moved with spinning blank, and driven longitudinal feed mechanism is capable of achieving to open
Power spinning, the length feed motor of driven longitudinal feed mechanism is operated under permanent moment of torsion maximum (top) speed mode of operation, is made driven vertical
Active longitudinal feed mechanism is followed to vertically move to feed mechanism speed adaptive, while being applied to the driven one end of spinning blank
Identical tension.
The present invention is driven to indulge as shown in figure 4, the direction of length feed is identical with flow direction during spinning blank material spinning
The identical tension applied to feed mechanism is in opposite direction with vertically moving for active longitudinal feed mechanism, and identical tension optimum range is σ1
=0.1 σ2~0.5 σ2。
Longitudinal feed mechanism as shown in Figure 2,3, including upper leading screw 2, upper screw 13, lower leading screw 3, lower screw 14, main spindle box
5th, main shaft 15, spindle drive motor and connector 6, main shaft 15 and spindle drive motor be arranged on main spindle box 5 in, upper leading screw 2, under
One end of leading screw 3 is fixedly mounted on lathe bed 11 by support 1, and the other end is fixedly mounted on spinning roller transverse feed mechanism 10,
Upper screw 13 and lower screw 14 are fixedly connected respectively with main spindle box 5, and upper screw 13 and lower screw 14 are respectively equipped with a length feed
Motor, drives screw to drive main spindle box 5 to vertically move along leading screw, and connector 6, the other end of connector 6 are installed in the end of main shaft 15
It is connected with the one end of spinning blank 8, the main shaft of the dynamic longitudinal feed mechanism of principal and subordinate is coaxial, the main shaft synchronization of the dynamic longitudinal feed mechanism of principal and subordinate
Spinning blank two ends synchronous rotary is made by connector during rotation.
Main spindle box adopts one piece casting case structure, main motor current to determine that motor is in rated power according to load design
Hereinafter work operation, makes motor feels hot be reduced to minimum.The speed of mainshaft has stepless time adjustment, uniformly linear function, meets spinning
The requirement of technique.Connector is heavy wall cylindrical part, and one end is that short wimble structure cone short with main shaft is connected, and the other end is fixed by internal diameter
Position and pin are connected with spinning blank one end.
Longitudinal feed mechanism moves drive shaft case and vertically moves using screw in rotation, and ball-screw does not rotate, and compiles
Code device detection feedback, constitutes closed-loop control system.Arranged in main spindle box diagonal using double ball-screws, eliminate the top of main spindle box
Cover the problems such as creeping under torque and heavy duty.
The short core 12 of fixation is as shown in figure 5, including core mandrel 1201, core end cap 1202, conical bearing 1203 and core
Mould body 1204, core mandrel 1201 is penetrated inside core body 1204, by the conical bearing 1203 at two ends and core body
1204 roll cooperation, and the one end of core mandrel 1201 is fixedly connected with core pull bar 4 by flange, and the other end is consolidated by nut 1205
Fixed, core end cap 1202 is separately mounted to the two ends of core body 1204 by two, and conical bearing 1203 is sealed in by core
In the shoe cream room 1207 that mandrel 1201 and core body 1204 are formed, fuel feed hole 1206 is processed on core body 1204.
The short core 12 of fixation is vertically fixed at the position of spinning roller 9, and spinning is placed in spinning blank 8 when working (length is thin-wall tube-shaped
Part) it is internal, due to spinning force effect and spinning blank 8 between the frictional force that produces drive the passive rotation of core body 1204,
Bear the horizontal spinning force and dynamic balance of three spinning rollers.
The short core 12 of fixation is manufactured using alloy tool steel material, built-in two groups of bearings for carrying cross force and longitudinal force
1203, core mandrel 1201 does not rotate, and is passively rotated by frictional force core body 1204.Core mandrel 1201 and core pull bar
4 are rigidly connected, and bear longitudinal force, and lateral attitude is determined by spinning blank 8 and three horizontal spinning rollers during work.
3rd, spinning process is selected
Spinning pass prepared according to the limit attenuating rate of 0Cr18Ni9 materials, raw material and spinning machine working ability come
Design, according to spinning blank wall thickness t1=23mm, is divided into three passage mould pressings.First passage reduction is 30.4%, second
Passage reduction is 43.8%, and the 3rd passage reduction is 44.4%.
According to institute's spinning blank wall thickness, roller working radius is 6mm；
Feed rate is selected：First passage is 0.8mm/rpm, and the first passage is 1mm/rpm, and the first passage is 1.5mm/rpm；
Three spinning roller mistakes are to be 5mm away from amount；
Speed of mainshaft 60rpm；
Tension force is 50KN.
4th, spinning blank install (as shown in figure 1)
Spinning blank 8 is placed in support meanss 7 by lifting device, and the right-hand member key of spinning blank 8 first is installed on the right side
On side connector 6, right side main spindle box 5 drives spinning blank 8 to be moved to the left and through the short core 12 of fixation, left side main spindle box is to the right
Mobile, the left end of spinning blank 8 is installed on the connector of left side, and support meanss 7 fall, and spinning blank is installed.
5th, spinning (as shown in figure 4, left side is active longitudinal feed mechanism)
Specific operation process is as follows：
(1) lengthwise position of regulation is moved to according to establishment spinning program spinning blank；
(2) start spinning according to spinning program, spinning blank two ends synchronous rotary, three spinning rollers start pre-rotation, cool down
Liquid begins to cool down, the horizontal servo feed of spinning roller；
(3) active longitudinal feed mechanism hauls spinning blank and vertically moves to the left, and spinning blank 8 is rotated while to the left
The gap of the setting between spinning roller 9 and the short core 12 of fixation is moved longitudinally through, driven longitudinal feed mechanism is applied to spinning blank
Plus tension force, tension force is 50KN, direction with main direction of feed conversely, driven longitudinal feed mechanism translational speed is self adaptation, speed
Size has the reduction decision of actively feeding and material, is passive effect, and under two-way longitudinal direction effect, follow procedure revolves spinning blank
Complete first passage；
(4) after according to spinning program finishes execution, support meanss rise support workpiece.Dismounting left side connector and spinning hair
The key of base connection, right side main spindle box drives spinning blank to move right disengaging floating core die, dismounting right side connector and spinning hair
The key of base connection, hangs tight workpiece and hangs away with crane.
(5) after the sofening treatment of workpiece, then it is installed on spinning machine, carries out second, third passage spinning.
6th, following process
Product is cut into two ends surplus on the basis of external diameter after centering, makes product meet design requirement.
Unspecified part of the present invention is known to the skilled person technology, can refer to National Defense Industry Press's publication
Statement first wait work《Shear spinning technique and equipment》.
Claims (7)
1. a kind of dextrorotation spin-on process, it is characterised in that comprise the following steps：
The first step, spinning blank prepares,
The spinning blank (8) of straight tubular construction of the processing two ends with keyway；
Second step, spinning machine prepares,
Described spinning machine includes rotary wheel mechanism and two nested structure identical longitudinal feed mechanisms, and longitudinal feed mechanism is pacified respectively
The both sides of rotary wheel mechanism are mounted in, rotary wheel mechanism lengthwise position is fixed；
3rd step, rotary pressure process parameter is selected, and determines spinning program；
4th step, spinning blank is installed,
The short core of the fixation (12) that spinning blank (8) is enclosed within spinning machine is outside, its two ends respectively with two sets of longitudinal feed mechanisms
Connection；
5th step, the spinning program set according to the 3rd step carries out spinning,
A5.1, determine active longitudinal feed mechanism, it is another set of for driven longitudinal feed mechanism；
A5.2, active longitudinal feed mechanism drive spinning blank (8) to vertically move, and make spinning blank (8) to spinning procedure stipulation
Longitudinal original position, spinning roller (9) traverse feed of rotary wheel mechanism is in the horizontal original position of spinning procedure stipulation；
A5.3, spinning blank (8) synchronous rotary under the driving of driving and driven longitudinal feed mechanism, spinning blank (8) is being rotated through
Length feed is driven by active longitudinal feed mechanism in journey, when the length feed direction of active feed mechanism is with spinning blank spinning
Stream direction is identical, and driven longitudinal feed mechanism speed adapts to follow active longitudinal feed mechanism to vertically move automatically, while applying
Add to the driven one end of spinning blank and length feed identical tension in opposite direction；
A5.4, short core (12) lengthwise position of fixation are fixed on spinning roller position, and revolve in the presence of the horizontal spinning force of spinning roller
Turn, spinning blank (8) is rotated while moving longitudinally through the gap between spinning roller (9) and the short core (12) of fixation, realization
The spinning of one passage of workpiece；
A5.5, sofening treatment will be carried out after the workpiece of a passage spinning is unloaded；
6th step, repeats the 4th step and the 5th step until completing the spinning of all passages.
2. a kind of dextrorotation spin-on process according to claim 1, it is characterised in that：Driven longitudinal direction is entered in step A5.3
It is operated under permanent moment of torsion maximum (top) speed mode of operation to the length feed motor of mechanism.
3. a kind of dextrorotation spin-on process according to claim 2, it is characterised in that：Driven longitudinal direction is entered in step A5.3
The driven one end identical tension of spinning blank (8), identical tension σ are applied to mechanism1=0.1 σ2~0.5 σ2, σ2For spinning blank material
Yield strength.
4. a kind of dextrorotation spin-on process according to claim 1, it is characterised in that：The 4th step spinning blank is installed logical
Following steps realization is crossed,
A4.1, spinning blank (8) are placed in the support meanss of spinning machine (7) by lifting device；
A4.2, the longitudinal feed mechanism of core pull bar (4) that will be far from spinning machine and one end of spinning blank (8) are fixed and are connected
Connect, longitudinal feed mechanism drives spinning blank (8) to move through the short core of the fixation (12) of spinning machine；
A4.3, the movement of another set of longitudinal feed mechanism, are fixedly connected with the other end of spinning blank (8), and support meanss (7) fall
Under.
5. a kind of dextrorotation spin-on process according to claim 1, it is characterised in that：Spinning described in the second step sets
Standby also to include lathe bed (11) and the short core (12) of fixation, described rotary wheel mechanism includes spinning roller (9) and spinning roller transverse feed mechanism
(10), spinning roller (9) is fixed on lathe bed (11) by spinning roller transverse feed mechanism (10), and lengthwise position is fixed, the short core of fixation
(12) spinning roller position is vertically fixed in by core pull bar (4), described longitudinal feed mechanism includes upper leading screw (2), upper screw
(13), lower leading screw (3), lower screw (14), main spindle box (5), main shaft (15), spindle drive motor and connector (6), main shaft (15)
It is arranged in main spindle box (5) with spindle drive motor, upper screw (13) and lower screw (14) are fixed with main spindle box (5) connect respectively
Connect, upper screw (13) and lower screw (14) are respectively equipped with a length feed motor, and connector (6) is installed in the end of main shaft (15),
Connector (6) is connected with spinning blank (8).
6. a kind of dextrorotation spin-on process according to claim 5, it is characterised in that：Short core is fixed in the second step
(12) including core mandrel (1201), core end cap (1202), conical bearing (1203) and core body (1204), core mandrel
(1201) penetrate core body (1204) internal, rolled with core body (1204) by the conical bearing (1203) at two ends and matched somebody with somebody
Close, core mandrel (1201) one end is fixedly connected with core pull bar (4), and core end cap (1202) is installed in core body (1204)
End, conical bearing (1203) is sealed in the shoe cream room (1207) formed by core mandrel (1201) and core body (1204)
It is interior.
7. a kind of dextrorotation spin-on process according to claim 5, it is characterised in that：In the second step upper leading screw (2) and
Lower leading screw (3) is in diagonal layout on main spindle box (5).
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| CN105710182B (en) * | 2016-02-18 | 2018-05-04 | 江西洪都航空工业集团有限责任公司 | A kind of long barrier part plate spin forming method |
| CN109213072B (en) * | 2017-09-07 | 2019-06-11 | 中国航空制造技术研究院 | A kind of spinning machine accuracy control method |
| CN108145381B (en) * | 2017-12-13 | 2020-08-07 | 航天特种材料及工艺技术研究所 | Internal spinning forming process for curved bus thin-wall shell with annular internal reinforcing ribs |
| GB2586218B (en) * | 2019-08-01 | 2021-11-10 | Subsea 7 Ltd | Incorporating metal fittings into metal tubing |
| CN112404894B (en) * | 2020-10-26 | 2022-03-01 | 英特派铂业股份有限公司 | Preparation method of large length-diameter ratio, small-caliber and ultrathin platinum or platinum-rhodium alloy crucible |
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