CN105798538B - Differential carrier squeezes punching technology - Google Patents
Differential carrier squeezes punching technology Download PDFInfo
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- CN105798538B CN105798538B CN201410833955.5A CN201410833955A CN105798538B CN 105798538 B CN105798538 B CN 105798538B CN 201410833955 A CN201410833955 A CN 201410833955A CN 105798538 B CN105798538 B CN 105798538B
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Abstract
The present invention relates to differential mechanism processing technique fields,More particularly to a kind of differential carrier squeezes punching technology,It first passes through forging by blank forging into initial forging,During forging,Bottom shaping groove among forging deep bid,It is molded in cylindrical end end face and flows downward the resistance slot of resistance for increasing metal,The groove of big tray bottom is pressed down against by punch again,Thickness during extruding between groove and resistance slot reduces to form gross weight,Excess metal between groove and resistance slot is to cylindrical end surrounding and lower flow,So that the length elongation of cylindrical end,The diameter of cylindrical end increases,It is full that the cavity of extruding lower die fills type,Then gross weight is washed out by punching die and forms through-hole,The present invention is by optimizing forging structure,Resistance slot is conducive to metal when squeezing and flows around,It is molded conducive to cylindrical end,The processing of through-hole is completed by punching again,Without drilling,Reduce reaming,The workload of bore hole,Improve stock utilization,Reduce production cost.
Description
Technical field
The present invention relates to differential mechanism processing technique fields, and punching technology is squeezed more particularly to a kind of differential carrier.
Background technology
Differential carrier is one of important component of differential mechanism, is a kind of housing of approximate rotary type, and differential carrier is smaller
One end is cylindrical end, and the other end is bowl-shape deep bid, is used to support differential mechanism major part, big tray bottom has along cylindrical end axis
To through-hole, which is used for across transmission shaft.Differential carrier generally by forging molding, then carries out metalworking again, existing
There is technology, if Patent No. " 201120535083.6 ", patent name are for " differential carrier blank precision forging mold "
Chinese utility model patent, by base, blocking, finish-forging three-step process, so as to be molded deep bid and cylindrical end, then follow-up
Metalworking in by drilling, reaming, Boring cylindrical end through-hole.
The prior art has following defect：First, due to the length of cylindrical end about 80 mm~120mm, the diameter about 50 of through-hole
Mm~70mm, therefore in drilling, reaming, bore hole, machining period is long, leads to production cost height；2nd, the metal material of through hole
On the one hand it is heated before forging together with blank, is also required to flow deformation in forging, high energy consumption, the portion of material is in metalworking
Shi Zuowei waste materials remove, and the utilization rate of forged material is low.
Invention content
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to and a kind of differential carrier is provided and squeezes punching technology, should
Technique by optimizing forging structure, with reference to squeeze punching technology processing differential carrier, do not need to drill, reduce reaming,
The workload of bore hole, improves stock utilization, reduces production cost.
The technical solution adopted by the present invention to solve the technical problems is：A kind of differential carrier squeezes punching technology, first leads to
Forging is crossed by blank forging into initial forging, during forging, the bottom shaping groove among forging deep bid, cylindrical end end face into
Type is used to increasing metal and flows downward the resistance slot of resistance, and the length of the cylindrical end of forging is L1, cylindrical end lower end it is a diameter of
D1, then be pressed down against by punch the groove of big tray bottom, a diameter of D2, D2 of extrusion die Correspondent cy linder end part during extruding
>D1, thickness during extruding between groove and resistance slot reduce to form gross weight, and the excess metal between groove and resistance slot is to cylinder
Hold surrounding and lower flow so that the length elongation of cylindrical end to L2, the diameter of cylindrical end increase to D2, ensure to squeeze lower die
It is full that cavity fills type, and then washing out gross weight by punching die forms through-hole.
Further, L1=0.90*L2~0.94*L2, D1=0.95*D2~0.97*D2.
Further, the resistance slot of the initial forging is upward arch, and the depth capacity of resistance slot is 15mm.
Further, the cylindrical end includes the first cylinder, the second cylinder, and the first cylinder is located at the top of the second cylinder,
The diameter of first cylinder is more than the diameter of the second cylinder, and deformation during extruding is happened at the second cylinder.
Further, the outer wall draft angle of first cylinder and the second cylinder is 3 °.
Further, after initial forging completes hot extrusion on extrusion die, go to punching die, forging under hot into
Row punching, then again by forging natural cooling.
When further, using punching die punching, it is carried out at the same time correction, cuts overlap.
Further, after extruding, the depth capacity of groove is 0.90*L2~0.95*L2, and the draft angle of groove is 1.5 °,
Resistance slot is the spherical crown shape that basal diameter is less than or equal to the diameter of through-hole, depth is 3mm, and the thickest of gross weight is 8mm.
Further, insert is provided in the lower die of extrusion die, the upper surface of insert and the lower face of forging, which contradict, to be connected
It connects.
Further, the upper mold of extrusion die is provided with backing-out punch, and backing-out punch is connect by nitrogen gas spring with upper mold seat, top
Go out the shape on the downside of device and the shape on the upside of forging coordinates, punch is located at the centre of backing-out punch, and punch passes through punch holder and upper mold
Seat is fixedly connected, and punch is slidably connected with backing-out punch, and when upper mold downlink, backing-out punch first contacts forging.
The beneficial effects of the invention are as follows：A kind of differential carrier squeezes punching technology, first pass through forging by blank forging into
Initial forging, during forging, the bottom shaping groove among forging deep bid is molded downward for increasing metal in cylindrical end end face
The resistance slot of flow resistance, then be pressed down against by punch the groove of big tray bottom, thickness during extruding between groove and resistance slot
Degree reduces and forms gross weight, and the excess metal between groove and resistance slot is to cylindrical end surrounding and lower flow so that cylindrical end
Length elongation, the diameter of cylindrical end increase, and squeezing the cavity of lower die, to fill type full, then washes out gross weight by punching die and is formed
Through-hole, by optimizing forging structure, resistance slot is conducive to metal when squeezing and flows around the present invention, conducive to cylindrical end into
Type, then complete by punching the processing of through-hole, without drilling, reduce reaming, bore hole workload, improve
Stock utilization reduces production cost.
Description of the drawings
Fig. 1 is that the differential carrier of the present invention squeezes the structure diagram of the initial forging of punching technology after forging.
The differential carrier that Fig. 2 is the present invention squeezes the structure diagram after the extrusion die that punching technology uses reduces.
The differential carrier that Fig. 3 is the present invention squeezes the forging structure diagram of punching technology after extrusion.
The differential carrier that Fig. 4 is the present invention squeezes forging structure diagram of the punching technology after punching.
Reference sign：
1 --- deep bid 2 --- cylindrical end
21 --- groove 22 --- resistance slots
23 --- the first cylinder 24 --- second cylinders
3 --- extrusion die 31 --- punches
32 --- backing-out punch 33 --- nitrogen gas springs
34 --- upper mold seat 35 --- punch holders
36 --- insert.
Specific embodiment
The present invention is described in further detail in the following with reference to the drawings and specific embodiments, is not the reality the present invention
Scope limitation is applied in this.
As shown in Figure 1, Figure 2, Figure 3, Figure 4, the differential carrier of the present embodiment squeezes punching technology, first passes through forging by blank
It is forged into initial forging, when forging is mainly molded the deep bid 1 of differential mechanism, and 2 shape and size after molding of cylindrical end are needed
It to be calculated according to the size of crimp, in the present embodiment, downward boss be set to exist by the upper mold of forging mold
The bottom shaping groove 21 of forging deep bid 1, groove 21 are located at the bottom centre of deep bid 1, the cross sectional shape of groove 21 be from up to
The circle of lower reduced diameter, the upward boss set by the lower die of forging mold is molded in the lower end of cylindrical end 2 to be hindered
Power slot 22, the effect of resistance slot 22 flow downward primarily to limiting metal when squeezing, increase the resistance that metal flows downward,
Circle of the cross sectional shape of resistance slot 22 for reduced diameter from bottom to up, the length of the cylindrical end 2 of forging are L1, cylindrical end
A diameter of D1 of 2 lower ends, then groove 21 is pressed down against by the punch 31 of extrusion die 3,3 Correspondent cy linder of extrusion die during extruding
Hold a diameter of D2, D2 of 2 parts>D1, therefore, during extruding, the thickness between groove 21 and resistance slot 22 reduces to form gross weight, and one
Aspect, excess metal between groove 21 and resistance slot 22 is to lower flow so that the length elongation of cylindrical end 2 to L2, it is another
Aspect, due to the effect of resistance slot 22, the excess metal between groove 21 and resistance slot 22 flows simultaneously to 2 surrounding of cylindrical end,
So that the diameter of cylindrical end 2 increases to D2, ensure that the cavity for squeezing lower die fills that type is full, especially the external margin of cylindrical end 2
Place, position molding difficulty is maximum, and metal is more advantageous to full of cavity by resistance slot 22.Then company is washed out by punching die
Skin forms through-hole, then carries out the following process such as metalworking again.The present invention is by optimizing the structure of forging, the groove of cylindrical end 2
21 and resistance slot 22 squeeze when, be conducive to metal and flow around, so as to by the diameter of the cylindrical end 2 of initial forging,
Length equidimension is designed smaller, compared with the processing technology of the prior art, has the distribution of continuous metal streamline, mechanicalness
It can be more preferable.It is molded the outer shape of cylindrical end 2 after extruding, is then punched out the processing for completing through-hole, punching along groove 21 again
Forging behind hole as shown in figure 4, without drilling, reduce reaming, bore hole workload, improve material use
Rate reduces production cost.The embodiment of the present invention, using the crank press of 400T, is not only reduced and is set when squeezing
Standby energy consumption, and the impact force that mold is subject to is reduced, improve the service life of mold.
In the prior art for there is hole forging also to have by directly being forged in hole after base, blocking, finish-forging or base
Then interior formation gross weight recycles punching press to wash out gross weight, but for differential carrier, since the size of product is larger, one
It is possible that blocking of not arranging, finish-forging die, this just needs to increase forging equipment, and forging cost is very high on platform forging host；
On the other hand, it is directly forged after base and gross weight is formed in hole, since punch is very long, punch is easily tilted and deformed, and is caused
The offset of forging hole position causes forging to scrap；And punch is long, and forging easily generates folding in deformation process, and demoulding is also stranded
Difficulty, low production efficiency.And be not required to be molded on forging host using the present invention, without drawbacks described above.
Further, according to our calculating and repetition test, the length L1 of the cylindrical end 2 of the forging of the present embodiment is best
Size is about 0.90*L2~0.94*L2, and the diameter D1 optimum sizes of 2 lower end of cylindrical end are about 0.95*D2~0.97*D2.Groove
The volume of reduction between 21 and resistance slot 22 is equal to cylindrical end diameter and length is increased leads to increased volume.
As shown in Figure 1, the resistance slot 22 of the initial forging is upward arch, the depth capacity of resistance slot 22 is
15mm。
As shown in Figure 1, Figure 3, the cylindrical end 2 includes the first cylinder 23, the second cylinder 24, and the first cylinder 23 is located at second
The top of cylinder 24, the diameter of the first cylinder 23 are more than the diameter of the second cylinder 24, are used to install after processing at the first cylinder 23
Bearing.Deformation during above-mentioned extruding is happened at the second cylinder 24, and the first cylinder 23 does not deform upon.First cylinder, 23 He
The outer wall draft angle of second cylinder 24 is 3 °, both convenient for draft, the also less processing capacity of metalworking.
Further, after initial forging completes hot extrusion on extrusion die 3, punching die is gone to, forging is under hot
It is punched out, punching while is corrected, cuts overlap, then again by forging natural cooling.
As shown in figure 3, after squeezing, the depth capacity of groove 21 is 0.90*L2~0.95*L2, and the draft angle of groove 21 is
1.5 °, resistance slot 22 is the spherical crown shape that basal diameter is less than or equal to the diameter of through-hole, depth is 3mm, and the depth of resistance slot 22 is not
Preferably excessive, convenient for punching in subsequent processing, the thickest of gross weight is 8mm, and after the wall thickness of gross weight refers to extruding, resistance slot 22 is most
For high point the distance between to the minimum point of groove 21, the optimum wall thickness of gross weight is 5mm-6mm.
After extruding, the depth capacity of groove is 0.90*L2~0.95*L2, and the draft angle of groove is 1.5 °, and resistance slot is bottom
The spherical crown shape that face diameter is less than or equal to the diameter of through-hole, depth is 3mm, the thickest of gross weight is 8mm.
As shown in Fig. 2, insert 36 is provided in the lower die of extrusion die 3, the upper surface of insert 36 and the lower face of forging
Connection is contradicted, insert 36 can be replaced, in forging extrusion process, stress at the arc edge of the drag intracavitary of extrusion die 3
It concentrates, easily cracks, and then forging is caused to generate burr in cracks, such case is then avoided by insert 36, is improved
Die life and product quality.Further, as shown in Fig. 2, the middle part of insert 36 is provided with boss, the boss stretches into during extruding
In resistance slot 22, be conducive to metal and flow around.
As shown in Fig. 2, the upper mold of extrusion die 3 is provided with backing-out punch 32, backing-out punch 32 passes through nitrogen gas spring 33 and upper mold
Seat 34 connects, and the shape on the upside of the shape and forging of 32 downside of backing-out punch coordinates, and punch 31 is located at the centre of backing-out punch 32, punch
31 are fixedly connected by punch holder 35 with upper mold seat 34, and punch 31 is slidably connected with backing-out punch 32, when upper mold downlink, backing-out punch
32 first contact forging, and backing-out punch 32 can compress forging, and in extrusion process, backing-out punch 32 limits forging deformation, and works as punch
31 when exiting, and backing-out punch 32 pushes down forging, is exited convenient for punch 31 from forging, and when reducing contact of the punch 31 with forging
Between, avoiding punch 31, overlong time damages at high temperature, it is also possible to be conveniently replaceable punch 31.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention rather than the present invention is protected
The limitation of range is protected, although being explained in detail with reference to preferred embodiment to the present invention, those of ordinary skill in the art should
Work as understanding, technical scheme of the present invention can be modified or replaced equivalently, without departing from the reality of technical solution of the present invention
Matter and range.
Claims (7)
1. differential carrier squeezes punching technology, it is characterised in that：Forging is first passed through by blank forging into initial forging, during forging,
Bottom shaping groove among forging deep bid is molded in cylindrical end end face and flows downward the resistance of resistance for increasing metal
Slot, the length of the cylindrical end of forging is L1, a diameter of D1 of cylindrical end lower end, then be pressed down against big tray bottom by punch
Groove, a diameter of D2, D2 of extrusion die Correspondent cy linder end part during extruding>D1, thickness during extruding between groove and resistance slot
Degree reduces and forms gross weight, and the excess metal between groove and resistance slot is to cylindrical end surrounding and lower flow so that cylindrical end
Length elongation to L2, the diameter of cylindrical end increases to D2, L1=0.90*L2~0.94*L2, D1=0.95*D2~0.97*D2, protects
Card squeezes the cavity of lower die, and to fill type full, then washes out gross weight by punching die and forms through-hole, initial forging is in extrusion die
After upper completion hot extrusion, punching die is gone to, forging is punched out under hot, is carried out at the same time correction, is cut overlap, then again will
Forging natural cooling.
2. differential carrier according to claim 1 squeezes punching technology, it is characterised in that：The resistance slot of the initial forging
For upward arch, the depth capacity of the resistance slot is 15mm.
3. differential carrier according to claim 1 squeezes punching technology, it is characterised in that：The cylindrical end includes the first circle
Column, the second cylinder, the first cylinder are located at the top of the second cylinder, and the diameter of the first cylinder is more than the diameter of the second cylinder, squeezes
When deformation be happened at the second cylinder.
4. differential carrier according to claim 3 squeezes punching technology, it is characterised in that：First cylinder and the second circle
The outer wall draft angle of column is 3 °.
5. differential carrier according to claim 1 squeezes punching technology, it is characterised in that：After extruding, the maximum of groove is deep
It spends for 0.90*L2~0.95*L2, the draft angle of groove is 1.5 °, and resistance slot is less than or equal to the diameter of through-hole, depth for basal diameter
The spherical crown shape for 3mm is spent, the thickest of gross weight is 8mm.
6. differential carrier according to claim 1 squeezes punching technology, it is characterised in that：It is set in the lower die of extrusion die
There is insert, the upper surface of insert and the lower face of forging, which contradict, to be connected.
7. differential carrier according to claim 1 squeezes punching technology, it is characterised in that：The upper mold of extrusion die is provided with
Backing-out punch, backing-out punch are connect by nitrogen gas spring with upper mold seat, the shape cooperation on the upside of the shape and forging on the downside of backing-out punch, punching
Head is located at the middle part of backing-out punch, and punch is fixedly connected by punch holder with upper mold seat, and punch is slidably connected with backing-out punch, works as upper mold
During downlink, backing-out punch first contacts forging.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410833955.5A CN105798538B (en) | 2014-12-30 | 2014-12-30 | Differential carrier squeezes punching technology |
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|---|---|---|---|
| CN201410833955.5A CN105798538B (en) | 2014-12-30 | 2014-12-30 | Differential carrier squeezes punching technology |
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| CN105798538B true CN105798538B (en) | 2018-06-08 |
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| CN109611460A (en) * | 2019-01-30 | 2019-04-12 | 江苏格尔顿传动有限公司 | A kind of the propeller shaft yoke class forging part and its processing method of high production efficiency |
| CN111975291A (en) * | 2020-07-24 | 2020-11-24 | 重庆文理学院 | Near-net forging forming method for precision forging of aluminum alloy special-shaped shell |
| CN112570611B (en) * | 2020-11-25 | 2022-11-08 | 湖北三环锻造有限公司 | Differential mechanism shell extrusion punching process |
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