CN103785699B - Method for forming hollowing portion of shaft portion - Google Patents
Method for forming hollowing portion of shaft portion Download PDFInfo
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- CN103785699B CN103785699B CN201310499190.1A CN201310499190A CN103785699B CN 103785699 B CN103785699 B CN 103785699B CN 201310499190 A CN201310499190 A CN 201310499190A CN 103785699 B CN103785699 B CN 103785699B
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Abstract
Provided is a method for forming a hollowing portion of a shaft portion. The method does not deform a pulley portion (15). A hollow portion (12) is formed by traversing the internal diameter side of the pulley portion (15) in the shaft portion (11). In the shaft portion (11) of the pulley portion (15) extended towards the outer side of radial direction at the middle position of the length direction, the hollow portion (12) is formed by extrusion processing of a columnar punch (P) and is extended from one end (11a) of the shaft portion (11) to the other end (11b) via the internal diameter side of the pulley portion (15). In the method for forming the hollowing portion (12) of the shaft portion (11), before the front end (Pa) of the punch (P) reaches the internal diameter side of the pulley portion (15), the hollowing portion (12) is formed by forward extrusion processing, and the hollowing portion (12) is formed by forward extrusion processing after the front end (Pa) of the punch (P) reaches the internal diameter side of the pulley portion (15).
Description
Technical field
The present invention relates to half-way in the longitudinal direction has the flange extending to radial outside by extrusion process
The method forming hollow bulb in the axle portion in portion.
Background technology
The belt wheel of variable v-belt drive possess fixing circular cone plate and between this fixation circular cone plate formed V-groove can
Dynamic circular cone plate, is retreated along rotation direction of principal axis by movable circular cone plate and moves, thus, the groove width of V-groove changes.
In fixing circular cone plate, flange shape sheave portion is from along the outer circumference radial outside rotating the axle portion that direction of principal axis extends
Extend, in axle portion, be formed with oilhole along rotation direction of principal axis.
At present, this oilhole is formed by cutting using drill bit etc., if but the light-weighted requirement according to buncher and
When making the internal diameter of oilhole become big, then can produce and operating cost increase greatly, and the material because of cutting are become due to the area of cutting
Quantitative change is many and the problem such as yield penalty.
Therefore, in order to solve these problems, motion has the reverse extrusion processing by making material plasticity deform, and forms axle portion
Oilhole method (for example, patent document 1).
Patent document 1：Japanese Unexamined Patent Publication 2003-343672 publication
Patent Document 1 discloses a kind of one end from the length direction of axle portion and the other end squeeze into drift respectively,
Method to form hollow bulb in axle portion.
In the case of the above-described method, by the rubble being squeezed out from drift (remaining meat) opposition side from the moving direction to drift
(rear side) extrudes, and forms hollow bulb, therefore, to form hollow bulb in the way of the internal side diameter crossing sheave portion, then simultaneously
Due to the rubble of extruding, the shape of sheave portion can change.
Accordingly, it would be desirable to constrain sheave portion from one end of axle portion and another side, prevent the deformation of sheave portion, accordingly, there exist
The problem of the structure large-scale of forging apparatus can be made.
Content of the invention
Then, the present invention provides a kind of forming method of the hollow bulb of axle portion, and it is the method that can more easily carry out,
That is, half-way in the longitudinal direction has in the axle portion of flange part, during formation hollow bulb molding by extrusion, will not make convex
Edge deforms, and can form hollow bulb in the way of the internal side diameter crossing flange part.
The present invention provides a kind of forming method of the hollow bulb of axle portion, and half-way in the longitudinal direction has to radially
In the axle portion of flange part that outside extends, formed by using the extrusion process of the drift of column and exceed from one end of this axle portion
The hollow bulb that the lateral another side of internal diameter of described flange part extends it is characterised in that reach described in the front end of described drift
Before the internal side diameter of flange part, described hollow bulb is formed by forward extrusion (front is given as security and gone out) processing, described convex reaching
After the internal side diameter of edge, described hollow bulb is formed by reverse extrusion (Hou side gives as security and goes out) processing.
According to the present invention, before the front end of drift reaches the internal side diameter of flange part, by the rubble being extruded by drift forward
The extruding of square side, forms hollow bulb simultaneously, after reaching the internal side diameter of flange, rubble is extruded rearward, in being formed simultaneously
Empty portion.
Therefore, during reaching in the front end of drift before the internal side diameter of flange part, rubble will not be to side and rear sidesway
Dynamic, therefore, rubble will not make the shape of flange part become big to flange part side shifting.
In addition, after the front end of drift reaches the internal side diameter of flange part, if continuing, by rubble, forwards side extrudes, convex
Forwards side is pulled it may occur however that fracture of the foundation of flange part etc. the wall of edge side, but reaches flange in the front end of drift
In the moment of the internal side diameter in portion, rubble is extruded rearward, therefore, the wall of flange part side will not forwards draw layback, also will not
There is fracture of foundation of flange part etc..
Therefore, will not significantly damage the shape of flange part, just can be formed in axle portion and exceed flange from one end of axle portion
The hollow bulb that the lateral another side of internal diameter in portion extends.
Brief description
Fig. 1 is the flow chart of the forming method of the hollow bulb of embodiment；
Fig. 2 (a), (b) are the figures of the forming method of the hollow bulb that embodiment is described；
Fig. 3 (a), (b) are the figures of the forming method of the hollow bulb that embodiment is described；
Fig. 4 (a), (b) are the figures of the forming method of the hollow bulb that embodiment is described；
Fig. 5 (a), (b) are the figures of the forming method of the hollow bulb that embodiment is described.
Symbol description
11 axle portions
11a one end
The 11b other end
111 base portions
112 large-diameter portions
113 reducing diameter parts
114 central diameter portions
115 reducing diameter parts
116 minor diameter parts
12 hollow bulbs
12a patchhole
15 sheave portion
15a pulley face
15b heavy section
30 knock-pins
30a upper end
50 punch dies
50a work mounting s face
51 hole portions
511 large diameter hole portions
512 undergauge hole portions
513 central diameter hole portions
514 undergauge hole portions
515 path hole portions
Lm1 assumes line
P drift
Pa front end
S space
W1 workpiece
W2 workpiece
W3 workpiece
W4 workpiece
Wa is spaced
X-axis line
Specific embodiment
Below, the forming method of the hollow bulb of the present invention is set forth in the movable circular cone plate of the belt wheel constituting automatic transmission
Axle portion in formed hollow bulb in case of illustrate.
Fig. 1 is the flow chart of the forming method of the hollow bulb of embodiment.
Fig. 2 is the figure of the forming method of the hollow bulb that embodiment is described, wherein, Fig. 2 (a) represents original shape
Workpiece W1 is positioned in the figure of the state of punch die 50, and Fig. 2 (b) is the forming process representing the hollow bulb 12 according to forward extrusion
Figure.
In addition, in the following, when the moving direction of the rubble to the workpiece being extruded by drift P illustrates, by drift P
Moving direction side (on the downside of in figure) be labeled as front, the opposition side (on the upside of in figure) of moving direction is labeled as rear.
As shown in Fig. 2 in the forming method of the hollow bulb of embodiment, to the length direction in columned axle portion 11
On half-way form the workpiece W1 of the flange shape sheave portion 15 that oriented radial outside extends, using columned drift P
Carry out extrusion process, so that the shape of the front of axle portion 11 is neat, form hollow bulb 12 in axle portion 11 simultaneously.
Therefore, when forming hollow bulb 12, after being processed into the surface application of lubricating of workpiece W1 of original shape, by work
Part W1 is arranged in (Fig. 1 on the punch die 50 of moving direction side (on the downside of in figure) of drift P：Step S101, reference Fig. 2 (a)).
Here, illustrating to the workpiece W1 of original shape.
In workpiece W1, the periphery of the position from one end 11a near the length direction of axle portion 11 for the sheave portion 15, along axle
Radially extending of central axis (below for axis X) in portion 11, throughout the complete cycle of the circumference around axis X, high with same radial
Degree is formed.
The other end 11b side (on the downside of in figure) of sheave portion 15 becomes the pulley face 15a that relative axis X tilts predetermined angular θ,
The internal side diameter of sheave portion 15 is changed into being formed as the heavy section 15b thicker than outside diameter.
One end 11a side of the sheave portion 15 of axle portion 11 is the base portion 111 of the patchhole 12a being formed with drift P.Patchhole
12a has the internal diameter mating with drift P and cross sectional shape, with hollow bulb 12 same inner diameter being formed in axle portion 11 and coaxial
Mode, with the axial length L 1 of the heavy section 15b of the internal side diameter to sheave portion 15 for one end 11a from base portion 111, along axis X
Formed.
Two gradient undergauges are divided along the direction away from sheave portion 15 in the other end 11b side of the sheave portion 15 of axle portion 11, from cunning
The columned large-diameter portion 112 that the internal side diameter of wheel portion 15 extends is via with the reducing diameter part that external diameter diminishes away from sheave portion 15
113, it is connected with columned central diameter portion 114.And, it is provided with the front end in central diameter portion 114 and become with away from sheave portion 15 external diameter
The reducing diameter part 115 of little truncated cone shape.
In addition, punch die 50 has the insertion hole portion 51 of axle portion 11 of workpiece W1 and the pulley face 15a side in supporting pulley portion 15
Work mounting s face 50a.
Work mounting s face 50a and pulley face 15a is same, and relative axis X tilts predetermined angular θ, is placed in punching in workpiece W1
During mould 50, it is kept in the state of the substantially entire surface of pulley face 15a is contacted with work mounting s face 50a.
Hole portion 51 is arranged along axis X axially through punch die 50, has with the workpiece W4's (with reference to Fig. 5) ultimately forming
The corresponding shape of the external diameter of axle portion 11.
In embodiments, hole portion 51 divides three gradient undergauges along the direction away from work mounting s face 50a, from work mounting s
Face 50a side becomes large diameter hole portion 511, undergauge hole portion 512, central diameter hole portion 513, undergauge hole portion 514, path hole portion 515 successively.
Undergauge hole portion 512 side (on the downside of in figure) in large diameter hole portion 511 is along the cylinder being axially formed as same inner diameter of axis X
Shape, the shape of the heavy section 15b of the corresponding sheave portion 15 in opposition side of undergauge hole portion 512, with expanding towards on the upside of in figure.
Large diameter hole portion 511 via as towards on the downside of in figure, the undergauge hole portion 512 of undergauge is connected with central diameter hole portion 513,
Central diameter hole portion 513 is via as towards on the downside of in figure, the undergauge hole portion 514 of undergauge is connected with path hole portion 515.
Path hole portion 515 extends along axis X, is inserted with columned knock-pin 30 in the lower end side of this path hole portion 515.
The upper end 30a of knock-pin 30 with being spaced apart of the other end 11b of the axle portion 11 of the workpiece W1 being arranged at punch die 50
It is spaced Wa and arranges, the starting stage before starting extrusion process, in path hole portion 515, guarantee there is space S.
Return to the explanation of the forming method of hollow bulb 12, when workpiece W1 is to (Fig. 1 after being provided with of punch die 50：Step
S101), after insertion setting drift P in the patchhole 12a of axle portion 11, make the other end 11b side (figure to axle portion 11 for the drift P
Middle downside) mobile, start to make the extrusion process of the material cold plastic deformation of composition workpiece W1.
Here, due to being provided with space S between the other end 11b and knock-pin 30 of workpiece W1, therefore, adding when starting extruding
After work, the rubble of the workpiece W1 being extruded from drift P moves to the lower section of knock-pin 30 side in this space S.
Therefore, during before the rubble of workpiece W1 reaches knock-pin 30 (filling up in space S), by forward extrusion plus
Work, makes the shape of the minor diameter part 116 of axle portion 11 neat, forms hollow bulb 12 (Fig. 1 in axle portion 11 simultaneously：Step S102, reference
Fig. 2 (b)).
Here, in embodiments, it is pre-formed with patchhole 12a in the base portion 111 of axle portion 11, according to extrusion process
The formation of hollow bulb 12 is carried out from the internal side diameter of the heavy section 15b of sheave portion 15.
For example, it is not pre-formed with the situation of patchhole 12a and the length in the axis X direction of patchhole 12a in base portion 111
In the case of shorter, when hollow bulb 12 is formed, the wall being extruded by drift P may move radially makes base portion 111 become large deformation.
In embodiments, patchhole 12a is formed with length L1 to the internal side diameter of sheave portion 15 (heavy section 15b), is extruded by drift P
Wall will not radially move in large quantities, therefore, base portion 111 and its nearby will not earth deformation.
In addition, in the following description, the hollow bulb that will be become by drift p-shaped in axle portion 11, comprise the insertion of drift P
The part of hole 12a, using symbol 12, mark is as hollow bulb 12.
Fig. 3 is the figure of the forming method of the hollow bulb that embodiment is described, wherein, Fig. 3 (a) be represent drift P reach from
The figure of the state of the switching point to reverse extrusion processing is processed in forward extrusion, represents the intermediate shape being obtained by forward extrusion processing
Workpiece W2, Fig. 3 (b) be represent according to reverse extrusion processing hollow bulb 12 forming process figure.
After square side pressure enters further downward, workpiece W1 is to the front side (lower section of rubble for position shown in from Fig. 2 (b) for the drift P
Side) movement be subject to because of knock-pin 30 hinder (Fig. 1：Step S103, be, with reference to Fig. 3 (a)).
Then, the rubble being extruded by drift P (upper side) movement rearward in hole portion 51, from large diameter hole portion 511 quilt
Extruding.
Therefore, when shown in this Fig. 3 (a), extrusion process switches to reverse extrusion processing from forward extrusion processing.
At this moment, the basic configuration in large diameter hole portion 511 forms substantially cylindrical shape, and the moving direction giving the rubble of extruding refers to
Tropism.Therefore, the rubble of extruding keep large diameter hole portion 511 cross sectional shape in the state of along axis X (top rearward
Side) mobile, make the large-diameter portion 112 on workpiece W2 axially extending along axis X.
Here, in embodiments, the other end 11b of the workpiece W1 in the original shape and upper end 30a of knock-pin 30
Setting interval Wa so that the front end of drift P reach the crosspoint by the hypothesis line lm1 of pulley face 15a and axis X when
Carve, the movement of the rubble of workpiece W1 forwards side is because of knock-pin 30 (with reference to Fig. 2 (a)) hindered.
For example, after becoming the workpiece W2 of the intermediate shape shown in Fig. 3 (a), in the state of forward extrusion, drift P's
Front end Pa exceedes hypothesis line lm1 and is just pressed into further along, in the case of reaching the position shown in figure wave-like line, in this process
In, the wall of the heavy section 15b side of sheave portion 15 follow drift P movement and forwards side (on the downside of in figure) pulled (in figure, ginseng
According to assuming line arrow), this is due to it may happen that the fracture of foundation of sheave portion 15 and crackle.
Therefore, in embodiments, in when that the front end Pa in drift P reaches the internal side diameter of sheave portion 15, squeeze from positive
Pressure processing switches to reverse extrusion processing, and the wall constituting sheave portion 15 will not be pulled to the moving direction side of drift P.
Therefore, form hollow bulb by reverse extrusion in the workpiece W2 to the intermediate shape being obtained by forward extrusion processing
12 period, (Fig. 3 (b), reference arrow) is extruded rearward by the rubble that drift P extrudes, therefore, the shape of sheave portion 15 is not
Can damage, so that large-diameter portion 112 is extended rearward.
Fig. 4 is the figure of the forming method of the hollow bulb that embodiment is described, wherein, Fig. 4 (a) be illustrate drift P reach from
Reverse extrusion processes the figure of the state of the switching point to forward extrusion processing, represents the intermediate shape being obtained by reverse extrusion processing
Workpiece W3, the figure of the state that Fig. 4 (b) is expressed as carrying out forward extrusion processing and unloads knock-pin 30 from punch die.
State shown in from Fig. 3 (b), when the formation of the hollow bulb 12 continuing according to reverse extrusion processing, before drift P
End Pa reaches internal side diameter (Fig. 1 of reducing diameter part 113：Step S105, be, with reference to Fig. 4 (a)).
Then, in this moment, unload knock-pin 30 (with reference to Fig. 4 (b)).Thus, the rubble being extruded by drift P can be forward
Square side (on the downside of in figure) is mobile, and therefore, extrusion process switches to forward extrusion processing (Fig. 1 from reverse extrusion processing：Step
S106, reference Fig. 4 (a), (b)).
For example, after becoming the workpiece W3 of the intermediate shape shown in Fig. 4 (a), in the state of reverse extrusion, drift P's
Front end Pa is pressed into the lower section of reducing diameter part 113, before reaching the position of the internal side diameter in central diameter portion 114 shown in figure wave-like line
In the case of, in this process, the wall in the central diameter portion 114 of the front side of drift P is by the gap △ between central diameter hole portion 513
W (difference in height), rearward (on the upside of in figure) pulled (in figure, with reference to assume line arrow).
Here, central diameter portion 114 is the path less than large-diameter portion 112, thus the amount of the wall that can move rearward is subject to greatly
The restriction of footpath portion 112 side, therefore, in the movement with drift P forwards side, the wall of central diameter portion 114 side is to large-diameter portion 112 side quilt
During pull, because of the deficiency of moveable wall, the part of reducing diameter part 113 is it may happen that crackle.
Therefore, in embodiments, drift P front end Pa be located at reducing diameter part 113 internal side diameter period any when
Carve (in figure, the optional position in the scope shown in △ L), by unloading knock-pin 30, switch to forward direction from reverse extrusion processing
Extrusion process, thus not making the wall of central diameter portion 114 side move to the rear of large-diameter portion 112 side, and make wall in central diameter portion 114 to
Front side is extruded, and reduces the possibility of crackle generation.
As long as in addition, processing the front end Pa of the switching drift P to forward extrusion processing shown in figure △ L from reverse extrusion
In the range of carry out, but be preferably drift P front end Pa reach reducing diameter part 113 large-diameter portion 112 side cardinal extremity when
Quarter is carried out.This is due to close to central diameter portion 114 side, can the wall of (on the upside of in figure) movement rearward quantitative change few.
Fig. 5 is the figure of the forming method of the hollow bulb that embodiment is described, wherein, Fig. 5 (a) is to represent that drift P reaches root
Formation according to the hollow bulb 12 of forward extrusion processing completes the figure of state a little, represents and processes obtain final according to forward extrusion
The workpiece W4 of shape, Fig. 5 (b) are that the figure that the workpiece W4 of net shape unloads from punch die 50 is described.
State shown in from Fig. 4 (b) for the drift P is when square side is pressed in further downward, and drift P is by rubble forwards side
(on the downside of in figure) extruding, makes the minor diameter part 116 of workpiece W4 axially extending along axis X, forms hollow bulb in axle portion 11 simultaneously
12.
And, when the length of hollow bulb 12 being formed in axle portion 11 by this forward extrusion processing reach prespecified
(Fig. 1 during specific length (for example, the length shown in figure L2)：Step S107, be, with reference to Fig. 5 (a)), complete drift P to figure
In lower direction movement, complete formation (Fig. 1 of the hollow bulb 12 according to forward extrusion processing：Step S108).
In embodiments, before the front end Pa of drift P will reach the internal side diameter of reducing diameter part 115, complete according to just
Formation to the hollow bulb 12 of extrusion process.If this is because the front end Pa in drift P reaches the position of the internal side diameter of reducing diameter part 115
Put the formation carrying out hollow bulb 12, then forming the reducing diameter part 115 after hollow bulb 12 can become too thin.
After completing forward extrusion processing, such as shown in Fig. 5 (b), by drift P after the workpiece W4 of net shape extracts, pass through
, thus, workpiece W4 is unloaded in knock-pin 30 insertion hole portions 51 (path hole portion 515) from punch die 50 to push up workpiece W4.
As described above, when the extrusion process by using columned drift P forms hollow bulb 12 in axle portion 11,
By suitably switching the direction of extrusion of the rubble being extruded by drift P, the deformation of sheave portion 15 and the root of sheave portion 15 will not occur
Fracture of base etc., can form hollow bulb 12 in the way of crossing the internal side diameter of sheave portion 15.Therefore, there is no need to as conventional example
The situation of forming method from the axial both sides constraint sheave portion 15 of axis X, only prepares to constrain rushing of the side of sheave portion 15 like that
Mould 50, therefore, will not make forging apparatus maximize, the formation of hollow bulb can be made more easily to carry out.
As previously discussed, in embodiments, provide a kind of forming method of the hollow bulb 12 of axle portion 11, in length direction
On half-way have to radial outside extend sheave portion 15 (flange part) axle portion 11 in, by using the drift of column
The extrusion process of P and formed from one end 11a of this axle portion 11 exceed sheave portion 15 internal diameter lateral other end 11b side extend
Empty portion 12, wherein, before the front end Pa of drift P reaches the internal side diameter of sheave portion 15, is processed by forward extrusion and forms hollow
Portion 12, after reaching the internal side diameter of sheave portion 15, is processed by reverse extrusion and forms hollow bulb 12.
If so constituting, before the front end Pa of drift P reaches the internal side diameter of sheave portion 15, by the workpiece of original shape
The forwards side extruding of the rubble of W1 forms hollow bulb 12, after reaching the internal side diameter of sheave portion 15, by intermediate shape simultaneously
The rubble of workpiece W2 extrudes formation hollow bulb 12 simultaneously rearward.
Therefore, the front end Pa in drift P reaches the period before the internal side diameter of sheave portion 15, and rubble is not to the shifting of drift P
The radial outside in dynamic direction and rear side shifting, therefore, rubble will not the shape of sheave portion 15 be to sheave portion 15 side shifting
Can become big.
In addition, after the front end Pa of drift P reaches the internal side diameter of sheave portion 15, if continuing the extruding of rubble forwards side,
Then forwards side is pulled the wall of sheave portion 15 side, and sheave portion 15 is possible to deform, and the foundation of sheave portion 15 is likely to occur disconnected
Split and crackle, but when the front end Pa of drift P reaches the internal side diameter of sheave portion 15, extrude rubble rearward, therefore, sliding
The wall of wheel portion 15 side will not forwards layback draw and the shape of sheave portion 15 will not become big, also will not send out in the foundation of sheave portion 15
Raw fracture and crackle.
Therefore, will not significantly damage shape of sheave portion 15 etc., and form one end 11a from axle portion 11 in axle portion 11
Exceed the hollow bulb 12 that the internal diameter lateral other end 11b side of sheave portion 15 extends.
Particularly, the reverse extrusion processing by making material plasticity deform, is formed into the hollow of oil circuit in axle portion 11
Portion 12, therefore, will not produce the process problem of cutting chip as formed the situation of hollow bulb in machining.In addition,
Even if making the internal diameter of hollow bulb become big, also will not produce formed in machining problem in the case of hollow bulb i.e., operation
Cost increases, and the amount due to discarded material increases and yield penalty of material etc..
In axle portion 11, the external diameter being provided with axle portion 11 in the other end 11b side of sheave portion 15 becomes with away from sheave portion 15
Little reducing diameter part 113,
When the front end Pa of drift P reaches with the border of reducing diameter part 113, hollow bulb 12 be formed into from reversely squeezing
Pressure processing switches to the forming method of the hollow bulb 12 in the axle portion 11 of composition of forward extrusion processing.
If after the front end Pa of drift P reaches reducing diameter part 113, when continuation rubble extrudes rearward, then before reducing diameter part 113
The quantitative change of the moveable wall in central diameter portion 114 side in face is few, and therefore, reducing diameter part 113 is it may happen that crackle etc..
Constitute as described above, when the front end Pa side of drift P reaches reducing diameter part 113, central diameter portion 114 side will not be made
Rear from wall to large-diameter portion 112 side move, but by by the wall in central diameter portion 114 forwards side extruding, contracting can be reduced
The possibility that footpath portion 113 cracks.
Further, since bigger than the situation in forward extrusion to the loading of drift applying in the case of reverse extrusion, therefore,
In the case of only passing through existing reverse extrusion formation hollow bulb, if the length of the hollow bulb being formed in axle portion, phase
Ying Di, the length of drift, therefore, drift may fracture.
In embodiments, when the extrusion process by using drift P forms hollow bulb, by forward extrusion, reversely squeeze
Pressure, the order of forward extrusion, change the direction of extrusion of the rubble being extruded by drift P, and combination reverse extrusion and forward extrusion are formed
Hollow bulb 12.Therefore, the loading acting on drift can be reduced by the entirety of extrusion process, therefore, the durability of drift
Improve.
Additionally, it is provided a kind of forming method of the hollow bulb of axle portion, that is, to having axle portion 11 and the length in above-mentioned axle portion 11
The workpiece W1 of the original shape of flange shape sheave portion 15 that the half-way on degree direction extends to radial outside, carries out basis
Using the extrusion process of the cold plastic deformation of columned drift P, make the shape of above-mentioned axle portion 11 neat, simultaneously in above-mentioned axle portion 11
Interior formed from its one end exceed above-mentioned sheave portion 15 the lateral another side of internal diameter extend hollow bulb 12, said method include as
Lower step：
(A) it is set to following state：There is the hole with the corresponding shape of shape of the axle portion 11 of the workpiece W4 of net shape
On the punch die 50 of work mounting s face 50a of pulley face 15a of portion 51 and the above-mentioned sheave portion 15 of supporting, above-mentioned original shape is set
Workpiece W1, the other end 11b side of above-mentioned axle portion 11 is inserted in above-mentioned hole portion 51, makes above-mentioned pulley face 15a be bearing in workpiece and prop up
Bearing surface 50a；
(B) after the patchhole 12a insertion setting drift P of one end 11a opening of the axle portion 11 of the workpiece W1 of original shape,
Make the other end 11b side shifting to axle portion 11 for the drift P, until the front end Pa of (a) drift P reaches the internal side diameter of sheave portion 15, and
And (b) by the movement of the rubble of drift P forwards side extruding because of the knock-pin 30 inserting in above-mentioned hole portion 51 hindered is
Only, hollow bulb 12 is formed in above-mentioned axle portion 11 by forward extrusion processing, as the workpiece W2 of intermediate shape；
(C) in the workpiece W2 of above-mentioned intermediate shape, make the further other end 11b sidesway to axle portion 11 for the above-mentioned drift P
Dynamic, until the front end Pa of above-mentioned drift P reaches the border with the reducing diameter part 113 of axle portion 11 of workpiece W2, by reverse extrusion plus
Work forms hollow bulb 12 in above-mentioned axle portion 11, as the workpiece W3 of intermediate shape；
(D) by above-mentioned knock-pin 30 after above-mentioned hole portion 51 unloads, in the workpiece W3 of above-mentioned intermediate shape, above-mentioned by making
Drift P further to axle portion 11 other end 11b side shifting to carry out forward extrusion processing, thus, make the shape of above-mentioned axle portion 11
Shape is neat to form hollow bulb 12, as the workpiece W4 of net shape in above-mentioned axle portion 11 simultaneously.
If so constituting, when forming hollow bulb 12, constitute wall the rushing by movement in axle portion 11 of sheave portion 15
Head P is pulled, and sheave portion 15 will not deform, and therefore, there is no need to as the situation of the forming method of conventional example, from axis X
Axial both sides constrain sheave portion 15, only prepare the punch die 50 of the side of constraint sheave portion 15, therefore, will not make forging apparatus
Maximize, and the formation of hollow bulb can be made more easily to carry out.
In embodiments, the axle portion exemplified with the movable circular cone plate in the belt wheel constituting automatic transmission forms hollow bulb
Situation, but as long as being that half-way in the longitudinal direction is provided with the axle portion part of the flange radially extending, convex to cross
The mode of the internal side diameter of edge forms the situation of hollow bulb it is possible to suitably be suitable for the method for the present invention.Therefore, it is not only belt wheel
Movable circular cone plate, form the situation of hollow bulb it is also possible to suitably with the present invention in the axle portion of reduction gearing etc..
Claims (2)
1. a kind of forming method of the hollow bulb of axle portion, half-way in the longitudinal direction have to radial outside extend convex
In the axle portion of edge, formed by using the extrusion process of the drift of column and exceed described flange part from one end of this axle portion
The lateral another side of internal diameter extend hollow bulb it is characterised in that
Before the front end of described drift reaches the internal side diameter of described flange part, processed by forward extrusion and form described hollow
Portion, after the front end of described drift reaches the internal side diameter of described flange part, is processed by reverse extrusion and forms described hollow bulb.
2. the hollow bulb of axle portion as claimed in claim 1 forming method it is characterised in that
In described axle portion, it is provided with the external diameter of described axle portion with away from described flange part in the described another side of described flange part
And the reducing diameter part diminishing,
When the front end of described drift reaches reducing diameter part, the formation of described hollow bulb switches to from the processing of described reverse extrusion
Described forward extrusion processing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-239304 | 2012-10-30 | ||
| JP2012239304A JP5713982B2 (en) | 2012-10-30 | 2012-10-30 | Method for forming hollow portion in shaft portion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103785699A CN103785699A (en) | 2014-05-14 |
| CN103785699B true CN103785699B (en) | 2017-02-22 |
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ID=50661993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310499190.1A Active CN103785699B (en) | 2012-10-30 | 2013-10-22 | Method for forming hollowing portion of shaft portion |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5713982B2 (en) |
| CN (1) | CN103785699B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6197136B1 (en) | 2017-04-03 | 2017-09-13 | マテック株式会社 | Method for manufacturing cup structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1672863A (en) * | 2004-03-26 | 2005-09-28 | 北京机电研究所 | Fast precise semi-axle casing extruding formation process |
| CN101648227A (en) * | 2009-08-27 | 2010-02-17 | 浙江拓进五金工具有限公司 | Multi-location cold extruding forming method of sleeve barrel |
| CN101690965A (en) * | 2009-10-10 | 2010-04-07 | 济南中森机械制造有限公司 | Hot extrusion forming process of half-shaft casings and special device |
| CN101829697A (en) * | 2010-05-06 | 2010-09-15 | 胡杰 | One-die double-top extrusion forming technology for automotive axle housing tube or engineering mechanical supporting axle |
| CN102172656A (en) * | 2010-12-10 | 2011-09-07 | 深圳航空标准件有限公司 | Resonance rod cold heading manufacturing method |
| CN102513791A (en) * | 2011-12-27 | 2012-06-27 | 十堰园钧工贸有限公司 | Technical method for forming semi-axle housing tube for large-diameter flange |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB121104A (en) * | 1918-05-06 | 1918-12-05 | Schneider & Cie | Method of and Apparatus for Making Metal Cylinders, Closed at One End and Provided with a Collar. |
| JPS5152360A (en) * | 1974-11-01 | 1976-05-08 | Daido Steel Co Ltd | SAKUSHUTSUTANZOHOHO |
| JPS62238040A (en) * | 1986-04-09 | 1987-10-19 | Aisan Ind Co Ltd | Cold forming method for hollow shaft like part with flange |
| JPS63126632A (en) * | 1986-11-17 | 1988-05-30 | Yamaguchi Seisakusho:Kk | Manufacture of base pin for fluorescent lamp |
| JP3164253B2 (en) * | 1992-12-25 | 2001-05-08 | 愛知製鋼株式会社 | Manufacturing method of hollow shaft-shaped forging with flange |
| JP3759396B2 (en) * | 2000-10-10 | 2006-03-22 | 大岡技研株式会社 | Hub high clutch, hub high clutch manufacturing method, and cold forging device for hub high clutch manufacturing |
| JP2003103340A (en) * | 2001-09-27 | 2003-04-08 | Toto Ltd | Manufacturing method for metallic part |
| JP4301767B2 (en) * | 2002-05-31 | 2009-07-22 | 株式会社ユニバンス | Method for forming hollow shaft pulley for belt type continuously variable transmission |
| JP4763977B2 (en) * | 2004-06-24 | 2011-08-31 | 株式会社神戸製鋼所 | Method for manufacturing cylindrical member or bottomed cylindrical member |
| US7055359B2 (en) * | 2004-07-26 | 2006-06-06 | Jinn Ruey Industries Co., Ltd. | Method for forging/molding a coarse blank of an oil cylinder |
| JP2006043716A (en) * | 2004-08-02 | 2006-02-16 | Toyota Motor Corp | Method for manufacturing hollow shaft with flange, and die for forming hollow shaft with flange |
-
2012
- 2012-10-30 JP JP2012239304A patent/JP5713982B2/en active Active
-
2013
- 2013-10-22 CN CN201310499190.1A patent/CN103785699B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1672863A (en) * | 2004-03-26 | 2005-09-28 | 北京机电研究所 | Fast precise semi-axle casing extruding formation process |
| CN101648227A (en) * | 2009-08-27 | 2010-02-17 | 浙江拓进五金工具有限公司 | Multi-location cold extruding forming method of sleeve barrel |
| CN101690965A (en) * | 2009-10-10 | 2010-04-07 | 济南中森机械制造有限公司 | Hot extrusion forming process of half-shaft casings and special device |
| CN101829697A (en) * | 2010-05-06 | 2010-09-15 | 胡杰 | One-die double-top extrusion forming technology for automotive axle housing tube or engineering mechanical supporting axle |
| CN102172656A (en) * | 2010-12-10 | 2011-09-07 | 深圳航空标准件有限公司 | Resonance rod cold heading manufacturing method |
| CN102513791A (en) * | 2011-12-27 | 2012-06-27 | 十堰园钧工贸有限公司 | Technical method for forming semi-axle housing tube for large-diameter flange |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103785699A (en) | 2014-05-14 |
| JP5713982B2 (en) | 2015-05-07 |
| JP2014087827A (en) | 2014-05-15 |
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