CN105964851B - Integral expansion extruding Driving axle housing side is rounded roller forging sheet stamping method - Google Patents
Integral expansion extruding Driving axle housing side is rounded roller forging sheet stamping method Download PDFInfo
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- CN105964851B CN105964851B CN201610497150.7A CN201610497150A CN105964851B CN 105964851 B CN105964851 B CN 105964851B CN 201610497150 A CN201610497150 A CN 201610497150A CN 105964851 B CN105964851 B CN 105964851B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
- B21J5/022—Open die forging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
- B21J5/027—Trimming
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Abstract
Roller forging sheet stamping method is rounded the invention discloses a kind of integral expansion extruding Driving axle housing side, to overcome the tube wall thickening of hollow object roller forging sheet stamping, the problem of wall unevenness is even, the step of method of the present invention:1) blanking；2) heat；3) roller forging sheet stamping：Two passage rollformings and a time shaping roll forging are carried out on forging roll and using core：(1) first passage rollforming；Forging roll forging roller, which rotates a circle, completes pipe (5) right-hand member the first passage rollforming, rectangular tube roll forging ovalisation variable-section tubular, while pipe (5) is separated with core (6)；(2) second passage rollformings：The roll forging of elliptic cross-section pipe is into round tube；(3) shaping roll forging；(4) pipe (5) Jing Guo shaping roll forging is rotated into 180 degree, clamp clamps the right-hand member of pipe (5), and rollforming pipe (5) unfashioned left end is the one end clamped when jaw starts in the same way；4) air cooling；5) alignment；6) Length-fixing cutting two ends.
Description
Technical field
The invention belongs to a kind of processing method of metal forming technical field, it more particularly relates to one
Plant and be rounded roller forging sheet stamping method for truck integral expansion extruding Driving axle housing side.
Background technology
Auto manufacturing is Chinese national economy pillar industry, and truck drive axle is automobile important spare part.
Shown according to correlation study：The car body weight for often subtracting 1% will reduce by 0.6%~1.0% fuel consumption, therefore auto parts is thin
Wall, cavitation are the directions of automotive light weight technology production development, and this requires each parts of automobile meeting strength and stiffness
Under conditions of lightweight as far as possible.
Drive axle mainly undertakes driving, carrying, the function of braking, is one of main parts size of automobile, overall at present to drive
The main manufacturing process of dynamic axle housing body has cast housing, punching-weldering housing, internal high pressure forming housing, integral expansion extruding housing.Casting
Cause shape general cylinder iron or cast steel casting is into axle housing, then axle tube is pressed into axle housing two ends, its variable wall thickness, by force
Degree, good rigidity, but total quality is big, percent defective is high, seriously polluted, is not suitable for automotive light weight technology production；Punching weldering housing is mainly
Two blocks of steel plates are struck out into half bridge shell respectively, then by two half bridge shells to welded together, its light weight, be easy to automated production,
Intensity is good, but process is more, and stock utilization is low, the phenomenons such as oil leak, fracture often occurs；Internal high pressure forming housing is by Large-diameter Steel
Convex closure part in the middle of pipe two ends undergauge, then internal high pressure forming, its stock utilization is high, and lightweight, process is few, formable complex shape
Shape, but investment is big, forming difficulty, productivity ratio is low, in being applied to, light-duty vehicle；Integral expansion extruding housing is by seamless steel pipe
Two ends shaft head point is squeezed into axle tube, and middle heat expansion centre bore, this axle housing can meet bridge compared with casting, punching-welding axle housing
Shell lightweight requirements, weld seam and machining are reduced compared with punching is welded into shape can improve stock utilization, and simplification of flowsheet is carried
High-mechanical property, equipment cost is low compared with internal high pressure forming, it is easy to shape, therefore the driving axle housing of integral expansion extrusion molding
Body will be widely used in actual production.
Integral expansion extrudes housing frequently with square pipe to shape, and must be become round at such spindle nose.Due to square tube
Four edges and corners deflections are big, and deformation is unstable, directly extrude undergauge difficulty greatly with square tube, axial unstability easily occur, therefore can
Square section first is become into smooth circular section to carry out extruding the shaft portion of reducing formation half again.Common hollow object forming technology has rotation
Pressure, radial forging, drawing etc., these process equipment costs are high, and roller forging sheet stamping efficiency high, and equipment investment is low, and suitable for big
It is plastically deformed, the higher preferable tubular blank of the form and dimensional precision needed for can obtaining extruding spindle nose makes spindle nose end
Extruding is possibly realized.This invention is exactly to provide preferable round tubular blank for extruding spindle nose.
The content of the invention
The technical problems to be solved by the invention are that the tube wall for the hollow object roller forging sheet stamping for overcoming prior art presence increases
It is thick, be rounded roller forging sheet stamping method there is provided a kind of integral expansion extruding Driving axle housing side the problem of wall unevenness is even.
In order to solve the above technical problems, the present invention adopts the following technical scheme that realization：Described integral expansion extruding
It is as follows including step that Driving axle housing side is rounded roller forging sheet stamping method:
1) blanking；
2) heat；
3) roller forging sheet stamping：
Two passage rollformings and a time shaping roll forging are carried out on forging roll and using core：
(1) first passage rollforming
Roll forging machinery hand vice mouthful clamp the left end of pipe and the right-hand member of pipe are enclosed on the outer surface of the first passage core,
While pipe and the first passage roll forging die enabling positioning are in right-hand delivery the first passage roll forging die enabling of pipe, wherein the first passage
Core position is fixed and vertical with forging roller, and forging roll forging roller, which rotates a circle, completes the first passage rollforming of pipe right-hand member, side
Shape pipe roll forging ovalisation variable-section tubular, while pipe is separated with the first passage core；
(2) second passage rollformings
First passage roll forging part is moved to second station by roll forging manipulator, and clamp is by the first passage roll forging part along its axle
Line is rotated by 90 °, and is enclosed on the second passage core and is positioned with the second passage roll forging die enabling, forging roller, which rotates a circle, completes the second passage roller
It is swaged into shape, the roll forging of elliptic cross-section pipe is into round tube；
(3) shaping roll forging
Second passage roll forging part is moved to the 3rd station by roll forging manipulator again, and clamp is by the second passage roll forging part along axle
Line is rotated by 90 °, and is enclosed on shaping roll forging core and is positioned with the roll forging die enabling of shaping roll forging, forging roller, which rotates a circle, completes shaping roller
Forging, the metal bump formed when eliminating the second passage shaping circular tube at roll gap；
(4) the roll forging part Jing Guo shaping roll forging is placed on blanking table and rotates 180 degree, mechanical-hand clamp clamps the right side of pipe
End, the unfashioned left end of step rollforming pipe, obtains the roll forging part of the equal shaping in the left and right two ends of pipe in the same way；
4) air cooling；
5) alignment；
6) Length-fixing cutting two ends.
Blanking described in technical scheme refers to：It is true according to the maximum square-section for the overall Driving axle housing to be processed into
The specification of fixed tube base, cuts into hot rolling square seamless steel pipe using band sawing machine the pipe of desired size, described desired size
Pipe a length of L4, L4=a+b+2c
In formula：A is the pipe length size determined according to Volume conservation law, and unit is mm；
B is considers the pipe length size corresponding to allowance, and unit is mm；
C is the length dimension that roll forging process blank end clamp position needs, and is taken as 20mm~50mm.
Heating described in technical scheme refers to：It is respectively that the pipe of well cutting is left and right each using Medium Frequency Induction Heating Furnace
A length of L0Two ends be heated to 1000 DEG C~1200 DEG C；
Wherein：L0=d+e+ (20~50) mm,
D is to need to be rounded the square tube length of tube section, and unit is mm；
E is the corresponding square tube length of transition region, and unit is mm.
Air cooling described in technical scheme refers to：The roll forging part of the equal shaping in left and right two ends is placed on sky by roll forging manipulator
Natural cooling in gas.
Alignment described in technical scheme refers to：The roll forging part handled through air cooling is placed on full-automatic alignment by roll forging manipulator
On machine, the clamping device of full automatic straightening machine clamps the roll forging part two ends handled through air cooling, automatically by roll forging part alignment.
Length-fixing cutting two ends described in technical scheme refer to：The roll forging part after alignment is respectively cut using band sawing machine
Left and right two ends, it is ensured that left and right two terminal circle section length of pipe section is L1, obtain final roll forging part.
Compared with prior art the beneficial effects of the invention are as follows：
1. integral expansion extruding Driving axle housing side of the present invention is rounded roller forging sheet stamping method and common hollow object
Roller forging sheet stamping technique is compared to many individual cores, geomery needed for being obtained by the gap between core and upper and lower roll forging die
Product.
2. integral expansion extruding Driving axle housing side of the present invention, which is rounded roller forging sheet stamping method, can effectively solve thickness
The even problem of tube wall thickening, wall unevenness that wall hollow object roll forging process occurs, the preparation for load-carrying vehicle drive axle shell blank has
Significance, is conducive to automotive light weight technology to produce.
3. integral expansion extruding Driving axle housing side of the present invention is rounded roller forging sheet stamping method stock utilization height, roller
Forge stability and forming accuracy is higher than thick-wall hollow part centreless mould roller forging sheet stamping, be conducive to parts lightweight to produce.
Brief description of the drawings
The present invention is further illustrated below in conjunction with the accompanying drawings：
Fig. 1 is the schematic diagram that integral expansion extruding Driving axle housing side of the present invention is rounded roller forging sheet stamping method；
Fig. 2-a are certain that integral expansion of the present invention extruding Driving axle housing side is rounded that roller forging sheet stamping method processed
The front view of load-carrying vehicle drive axle shell；
Fig. 2-b are certain that integral expansion of the present invention extruding Driving axle housing side is rounded that roller forging sheet stamping method processed
The left view of load-carrying vehicle drive axle shell；
Fig. 3 is that integral expansion extruding Driving axle housing side of the present invention is rounded the base to be prepared in roller forging sheet stamping method
The front view of material；
Fig. 4-a are the profiles of blank at A-A in Fig. 3；
Fig. 4-b are the profiles of blank at B-B in Fig. 3；
Fig. 5-a are that integral expansion of the present invention extruding Driving axle housing side is rounded roller forging sheet stamping method and shapes certain load-carrying
The front view of pipe employed in the embodiment of car banjo axle；
Fig. 5-b are the profiles of pipe at C-C in Fig. 5-a；
Fig. 6-a are that integral expansion of the present invention extruding Driving axle housing side is rounded that roller forging sheet stamping method used
The front view of a time roll forging die enabling；
Fig. 6-b be in Fig. 6-a direction view from D to the upper mould of the first passage roll forging die enabling；
Fig. 6-c are the profiles of the first passage roll forging die enabling at E-E in Fig. 6-a；
Fig. 7-a are the first passages that integral expansion extruding Driving axle housing side of the present invention is rounded roller forging sheet stamping method
The front view of roll forging part；
Fig. 7-b are the profiles of the first passage roll forging part at F-F in Fig. 7-a；
Fig. 7-c are the profiles of the first passage roll forging part at G-G in Fig. 7-a；
Fig. 8-a are that integral expansion of the present invention extruding Driving axle housing side is rounded that roller forging sheet stamping method used
The front view of two passage roll forging die enablings；
Fig. 8-b be in Fig. 8-a direction view from H to the upper mould of the second passage roll forging die enabling；
Fig. 8-c are the profiles of the second passage roll forging die enabling at I-I in Fig. 8-a；
Fig. 9 is the roller forging sheet stamping mistake that integral expansion extruding Driving axle housing side of the present invention is rounded roller forging sheet stamping method
The front view of shaping passage core employed in journey；
Figure 10-a are that integral expansion of the present invention extruding Driving axle housing side is rounded roller forging sheet stamping method and has core roller
Profile at the circular section of forging；
Figure 10-b are that integral expansion extruding Driving axle housing side of the present invention is rounded roller forging sheet stamping method centreless die
Profile at the circular section of forging；
Figure 11 is that integral expansion of the present invention extrudes the FB(flow block) that Driving axle housing side is rounded roller forging sheet stamping method；
In figure：1. on forge roller, 2. times forging rollers, mould, 4. times moulds, 5. pipes, 6. first passage cores on 3..
Embodiment is explained in detail to the present invention below in conjunction with the accompanying drawings：
Roller forging sheet stamping side is rounded it is an object of the invention to provide a kind of bogie integral expansion extruding Driving axle housing side
Method, by managing the roll forging of square tube two ends into square tube wall thickness identical circular section in the concrete-cored mould of roll forging process, for subsequent extrusion
Axle tube is used.Its core mould is fixed, serves the effect of internal model, is conducive to internal surface of bloom metal axial to flow,
The wall thickness of pipe can be effectively controlled, makes uniform wall thickness, the quality and precision of pipe fitting is improved, increases the utilization rate of material.
The use of core also add the supporting role to internal surface of bloom simultaneously, improve the stability of whole roll forging process.
Integral expansion of the present invention extruding Driving axle housing side is rounded roller forging sheet stamping method, by square-ellipse-
The circular passage rollforming of type groove system two, it is comprised the following steps that：
1. blanking
Refering to Fig. 5-a and Fig. 5-b, pipe is determined according to the maximum square-section for the overall Driving axle housing to be processed into
Specification, then the square seamless steel pipe of hot rolling is cut into band sawing machine the pipe of desired size, the pipe 5 of described desired size is grown
For L4, wherein：L4=a+b+2c
In formula：A is the pipe length size determined according to Volume conservation law, and unit is mm；
B is considers the pipe length size corresponding to allowance, and unit is mm；
C is the length dimension that roll forging process blank end clamp position needs, generally 20mm~50mm；
2. heating
Using Medium Frequency Induction Heating Furnace respectively by each a length of L of the pipe of well cutting or so0Two ends be heated to initial forging temperature,
Usual 1000 DEG C~1200 DEG C；
Wherein：L0=d+e+ (20~50) mm,
D is to need to be rounded the square tube length of tube section, and unit is mm；
E is the corresponding square tube length of transition region, and unit is mm；
3. roller forging sheet stamping
On D42-1000 forging rolls and (side-oval-circle) two passage rollformings are carried out using core and a time is whole
Shape roll forging：
1) the first passage rollforming
Roll forging machinery hand vice mouthful clamp the left end of pipe 5 and the right-hand member of pipe 5 are enclosed on into the outer surface of the first passage core 6
On, while the passage roll forging die enabling positioning of pipe 5 and first is in the right-hand delivery roll forging die enabling of pipe 5, wherein the first passage core 6
Position is fixed and vertical with forging roller, and forging roll forging roller, which rotates a circle, completes the first passage rollforming of the right-hand member of pipe 5, square
Variable-section tubular roll forging ovalisation variable-section tubular, while pipe 5 is separated with the first passage core 6；
2) the second passage rollforming
First passage roll forging part is moved to second station by roll forging manipulator, and clamp is by the first passage roll forging part along its axle
Line is rotated by 90 °, and is enclosed on the second passage core and is positioned with the second passage forge rolling die, forging roller, which rotates a circle, completes the second passage roll forging
Shaping, the roll forging of elliptic cross-section pipe is into circular tube；
3) shaping roll forging
Second passage roll forging part is moved to the 3rd station by roll forging manipulator again, clamp by the second passage roll forging part along its
Axis is rotated by 90 °, and is enclosed on shaping roll forging core and is positioned with the forge rolling die of shaping roll forging, forging roller, which rotates a circle, completes shaping roller
Forging, the metal bump formed when eliminating the second passage shaping circular tube at roll gap；
4) rotation of shaping roller forging is placed on blanking table for 180 ° by last roll forging manipulator, and mechanical-hand clamp has clamped pipe
Shaping roller is swaged into the right-hand member of circular tube, in the same way the unfashioned left end of rollforming pipe, obtains left and right two ends
The roll forging part of equal shaping；
4. air cooling；
The roll forging part of the equal shaping in left and right ends is put together natural cooling in atmosphere by roll forging manipulator；
5. alignment；
The roll forging part handled through air cooling is placed on the correct position of full automatic straightening machine, the clamping of straightener by roll forging manipulator
Device clamps roll forging part two ends, automatically by roll forging part alignment；
6. Length-fixing cutting two ends.
Refering to Fig. 3, the left and right two ends of the roll forging part after alignment are respectively cut using band sawing machine, it is ensured that left and right two terminal circle is cut
Facial canal segment length is L1, obtains final roll forging part.
It is the schematic diagram of the roller forging sheet stamping on forging roll refering to Fig. 1, in figure, represents the position that roll forging part has just been bitten by forging roll
Put figure.
Roll forging die enabling
The roll forging die enabling of described each passage includes two sections of transition region and uiform section area；The first described passage roll forging die enabling
The die cavity in uiform section area is ellipse, and the die cavity in the second passage roll forging die enabling uiform section area is circle, shaping roll forging die enabling and the
Two road roll forging die enablings are identical；Wherein described the first passage, the second passage and shaping roll forging die enabling are symmetrical above and below, mould outlet with
Porch radius of corner R1, such as Fig. 6-a and Fig. 8-a；Gap between upper and lower roll forging die is s；Described core is cylinder
Solid bar, the core diameter of the first passage and the second passage is slightly less than square section, the maximum inscribe of oval cross section inner surface respectively
Circular diameter, but more than shaping passage core diameter, the core diameter of shaping passage is fixed, the gap between roll forging die enabling and core
For the circular section pipe thickness to be shaped, core is lubricated with aquadag before the use.
Embodiment
Refering to Fig. 2-a, certain bogie integral housing includes axle housing 7 and 2 structure identical axle tubes 8, overall
Axle housing 7 and 2 structure identical axle tubes 8 are integrated by axle housing.
It is the blank of the overall Driving axle housing of production, i.e., the roll forging to be shaped in the present embodiment shown in figure refering to Fig. 3
Part, the blank of the overall Driving axle housing of production is bilateral symmetry part, wherein:The circular section segment length L1=of rollforming
The changeover portion L2=45mm of 400mm, square-section and circular cross-section.
Refering to Fig. 3, Fig. 4-a and Fig. 4-b, the embodiment of the present invention mainly manages the two ends roll forging of square tube pipe into circular section,
Overall Driving axle housing roller forging sheet stamping is realized, qualified blank is provided for follow-up two ends extruding axle tube.
The roll forging device of the embodiment of the present invention includes the forging roll of upper and lower roll forging mould, core and D42-1000.
The step of embodiment of the present invention, is as follows：
1. blanking
Refering to Fig. 5-a and Fig. 5-b, from the length of side L3=160mm of the seamless square tube of square iso-cross-section, wall thickness B1
=16mm, 4 structure identical radius of corner R3=32mm, uses band sawing machine to cut into seamless square tube and requires length for L4
Pipe 5；
2. heating
Each long 380mm~400mm of seamless square tube pipe 5 two ends are heated to by the forging temperature that begins using intermediate-frequency heating furnace respectively
Degree, usually 1000 DEG C~1200 DEG C；
3. roller forging sheet stamping
The two ends of pipe 5 are carried out with (side-oval-circle) two passages respectively on D42-1000 forging rolls and using core
Rollforming and a time shaping roll forging：
1) the first passage rollforming
Roll forging machinery hand vice mouthful clamp the left end of pipe 5 and the right-hand member of pipe 5 are enclosed on into the outer surface of the first passage core 6
On, while the passage roll forging die enabling of pipe 5 and first is positioned, wherein the position of the first passage core 6 is fixed and vertical with forging roller, roll forging
Machine forging roller, which rotates a circle, completes the first passage roll forging, the right-hand member roll forging ovalisation variable-section tubular of pipe 5, while pipe 5 and first
Passage core 6 is separated；
2) the second passage rollforming
First passage roll forging part is moved to second station by roll forging manipulator, and clamp is by the first passage roll forging part around its axle
Line is rotated by 90 °, and is enclosed on the second passage core and is positioned with the second passage roll forging die enabling, forging roller, which rotates a circle, completes the second passage roller
Forging, the elliptic cross-section pipe roll forging of the right-hand member of pipe 5 is into round tube；
3) shaping roll forging
Second passage roll forging part is moved to the 3rd station by roll forging manipulator again, and clamp is by the second passage roll forging part around it
Axis is rotated by 90 °, and is enclosed on the core of shaping roll forging and is positioned with shaping roll forging die enabling, forging roller, which rotates a circle, completes shaping roll forging,
The second passage roll forging is eliminated into the metal bump of formation at roll gap during round tube；
4) refering to Fig. 4-a and Fig. 4-b, finally the roll forging part of shaping is placed on blanking table and turnback is revolved, roller
Forging mechanical-hand clamp clamps pipe, and shaping roller is swaged into the right-hand member of circular cross-section, in the same way by the left end roll forging of pipe 6
Shaping, obtains the roll forging part of the equal shaping in the left and right two ends of pipe：φ 1=154mm, wall thickness B1 manage for 16mm circular section.
4. air cooling
The roll forging part of the equal shaping in left and right two ends is placed on natural cooling in atmosphere by roll forging manipulator；
5. alignment
The roll forging part handled through air cooling is placed on the correct position of full automatic straightening machine, the clamping of straightener by roll forging manipulator
Device clamps roll forging part two ends, automatically by roll forging part alignment；
6. Length-fixing cutting two ends
Refering to Fig. 3, the left and right two ends of the roll forging part after alignment are respectively cut with band sawing machine, it is ensured that left and right two ends circular section
Segment length is 400mm, obtains final roll forging part.
Described upper and lower roll forging die is flat back die symmetrical above and below, mold materials 5CrNiMo.Upper and lower roll forging die is symmetrical
Ground is arranged on forging roll of the forging roller diameter for 680mm D42-1000, and upper and lower roll forging die gap S is 5mm.
Refering to Fig. 6-a to Fig. 6-c, the first described passage forge rolling die uiform section die cavity is ellipse, ab sections of transition region bags
Angle α 1=5 ° 24 ', whole 2=50 ° of flat back die wrap angle sigma~65 °.Longitudinal type groove front tube base bites shape and size and the side at place
Size of the pipe under initial forging temperature is consistent, as shown in mould oblique view in first of roll forging at D in Fig. 6-b, and the first passage is upper and lower
The chamfering circular arc radius R4=32mm of each groove waist and cylindrical anchor ring on forge rolling die ab segment type grooves；The width L5=of oval type groove
210.16mm, height L6=156.4mm, ellipse groove radius R5=109.7mm, the first passage upper and lower roll forging die bc segment type grooves
On each groove waist and cylindrical anchor ring chamfering circular arc radius R6=25mm, pipe 6 deforms section after the completion of the first passage roll forging
Shape such as Fig. 7-c.
Refering to Fig. 8-a to Fig. 8-c, the second described passage forge rolling die as shown in FIG., because roll forging process is typically to make
Blank extends, so the cornerite of the second passage forge rolling die is more than the cornerite of the first passage forge rolling die.Uiform section die cavity is circle, de
3=6 ° 2 ' of section transition region wrap angle sigma, whole 4=59 ° of flat back die wrap angle sigma~74 °.Longitudinal type groove front tube base bites place's section shape
Shape and size are identical with the first passage mould；Such as Fig. 8-b, the diameter phi 2 of round groove is beginning to forge temperature for roll forging part circular section section
The chamfering circular arc radius R7 of each groove waist and cylindrical anchor ring on size under degree, the second passage upper and lower roll forging die ef segment type grooves
=10mm.
Shaping passage mould is identical with the second passage mould.
Refering to Fig. 9, described each passage core is cylindrical base solid rod.First passage core 6 is straight with the second passage core
Footpath is slightly less than square section, the maximum inscribed circle diameter of oval cross section inner surface and the core diameter phi 3 for being more than shaping passage respectively,
φ 3=123.83mm, the two ends radius of corner R2=15mm of shaping passage core；Described its center line of core position, pipe
The center line of center line and upper and lower roll forging die will align.
Be respectively band core (Figure 10-a) refering to Figure 10-a and Figure 10-b, in figure with without core (Figure 10-b) roll forging into
The circular section pipe of shape, integral housing circular section thickness is identical with square section, and belt carcass mould roller forging sheet stamping wall thickness can accurately reach
16mm, without the tube wall thickening about 1.5mm of core roll forging part, and wall unevenness is even, there is certain ovality, forming accuracy compared with
It is low.
Claims (6)
1. a kind of integral expansion extruding Driving axle housing side is rounded roller forging sheet stamping method, it is characterised in that, described integral expansion
It is as follows including step that extruding Driving axle housing side is rounded roller forging sheet stamping method:
1) blanking；
2) heat；
3) roller forging sheet stamping：
Two passage rollformings and a time shaping roll forging are carried out on forging roll and using core：
(1) first passage rollforming
Roll forging machinery hand vice mouthful clamp the left end of pipe (5) and the right-hand member of pipe (5) are enclosed on to the appearance of the first passage core (6)
On face, while pipe (5) and the first passage roll forging die enabling positioning are in right-hand delivery the first passage roll forging die enabling of pipe (5),
Wherein first passage core (6) position is fixed and vertical with forging roller, and forging roll forging roller rotates a circle the of completion pipe (5) right-hand member
A time rollforming, rectangular tube roll forging ovalisation variable-section tubular, while pipe (5) is separated with the first passage core (6)；
(2) second passage rollformings
First passage roll forging part is moved to second station by roll forging manipulator, and clamp revolves the first passage roll forging part along its axis
Turn 90 °, be enclosed on the second passage core and with the second passage roll forging die enabling position, forging roller rotate a circle completion the second passage roll forging into
Shape, the roll forging of elliptic cross-section pipe is into round tube；
(3) shaping roll forging
Second passage roll forging part is moved to the 3rd station by roll forging manipulator again, and clamp revolves the second passage roll forging part along axis
Turn 90 °, be enclosed on shaping roll forging core and positioned with the roll forging die enabling of shaping roll forging, forging roller, which rotates a circle, completes shaping roll forging, disappears
The metal bump formed when shaping circular tube except the second passage at roll gap；
(4) the roll forging part Jing Guo shaping roll forging is placed on blanking table and rotates 180 degree, mechanical-hand clamp clamps the right-hand member of pipe,
Step rollforming pipe (5) unfashioned left end, obtains the roll forging of the equal shaping in pipe (5) left and right two ends in the same way
Part；
4) air cooling；
5) alignment；
6) Length-fixing cutting two ends.
2. it is rounded roller forging sheet stamping method according to the integral expansion extruding Driving axle housing side described in claim 1, it is characterised in that,
Described blanking refers to：
The specification of pipe is determined according to the maximum square-section for the overall Driving axle housing to be processed into, using band sawing machine by hot rolling
Square seamless steel pipe cuts into the pipe (5) of desired size, pipe (5) a length of L4, L4=a+b+2c of described desired size
In formula：A is the pipe length size determined according to Volume conservation law, and unit is mm；
B is considers the pipe length size corresponding to allowance, and unit is mm；
C is the length dimension that roll forging process blank end clamp position needs, and is taken as 20mm~50mm.
3. it is rounded roller forging sheet stamping method according to the integral expansion extruding Driving axle housing side described in claim 1, it is characterised in that,
Described heating refers to：
Using Medium Frequency Induction Heating Furnace respectively by the left and right each a length of L of the pipe (5) of well cutting0Two ends be heated to 1000 DEG C~
1200℃；
Wherein：L0=d+e+ (20~50) mm,
D is to need to be rounded the square tube length of tube section, and unit is mm；
E is the corresponding square tube length of transition region, and unit is mm.
4. it is rounded roller forging sheet stamping method according to the integral expansion extruding Driving axle housing side described in claim 1, it is characterised in that,
Described air cooling refers to：
The roll forging part of the equal shaping in left and right two ends is placed natural cooling in atmosphere by roll forging manipulator.
5. it is rounded roller forging sheet stamping method according to the integral expansion extruding Driving axle housing side described in claim 1, it is characterised in that,
Described alignment refers to：
The roll forging part handled through air cooling is placed on full automatic straightening machine by roll forging manipulator, and the clamping device of full automatic straightening machine will
The roll forging part two ends handled through air cooling are clamped, automatically by roll forging part alignment.
6. it is rounded roller forging sheet stamping method according to the integral expansion extruding Driving axle housing side described in claim 1, it is characterised in that,
Described Length-fixing cutting two ends refer to：
The left and right two ends of the roll forging part after alignment are respectively cut using band sawing machine, it is ensured that left and right two terminal circle section length of pipe section is equal
For L1, final roll forging part is obtained.
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| CN201610497150.7A CN105964851B (en) | 2016-06-30 | 2016-06-30 | Integral expansion extruding Driving axle housing side is rounded roller forging sheet stamping method |
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| CN201610497150.7A CN105964851B (en) | 2016-06-30 | 2016-06-30 | Integral expansion extruding Driving axle housing side is rounded roller forging sheet stamping method |
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| CN108672634A (en) * | 2018-08-15 | 2018-10-19 | 山东千里马锻压自动化设备有限公司 | Crank roller forging sheet stamping shaping dies |
| CN110125294B (en) * | 2019-06-18 | 2024-04-26 | 山东金锻自动化设备有限公司 | Roll forging forming process, roll forging die and full-automatic roll forging machine |
| CN112903174B (en) * | 2020-12-30 | 2024-01-16 | 南京晨光东螺波纹管有限公司 | Corrugated pipe for nuclear fusion and manufacturing process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3120591B2 (en) * | 1992-08-28 | 2000-12-25 | 石川島播磨重工業株式会社 | Round bar forging method |
| CN100493821C (en) * | 2007-10-15 | 2009-06-03 | 湖北三环车桥有限公司 | Manufacturing method of the coupler yoke for railway wagon |
| CN201267858Y (en) * | 2008-08-15 | 2009-07-08 | 北京机电研究所 | Roll forging mold of railway goods train coupler yoke frame |
| CN101549384B (en) * | 2009-02-18 | 2010-12-22 | 北京机电研究所 | Roll forging technology for producing roll forging parts with length exceeding maximum permissible length of roll forging machine |
| CN102319867A (en) * | 2011-09-29 | 2012-01-18 | 芜湖禾田汽车工业有限公司 | Forging forming process for control arm |
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