CN106001380A - Crankshaft production method - Google Patents
Crankshaft production method Download PDFInfo
- Publication number
- CN106001380A CN106001380A CN201610119575.4A CN201610119575A CN106001380A CN 106001380 A CN106001380 A CN 106001380A CN 201610119575 A CN201610119575 A CN 201610119575A CN 106001380 A CN106001380 A CN 106001380A
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- China
- Prior art keywords
- mold
- lower mold
- forming
- pin
- bent axle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/06—Making machine elements axles or shafts
- B21K1/08—Making machine elements axles or shafts crankshafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
-
- 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
Abstract
The invention provides a crankshaft production method, which is characterized in that materials in each step can be easily positioned, and the yield rate is prevented from decreasing. As a lower die (210) of a rough forging die (200), a lower die (210) is used having a bottom face of a groove (221) positioned in a direction orthogonal to an axial direction of a second pin shaping portion (214) has a sloped face (S) for suppressing the growth of burrs (931). A production method of crankshafts for inline 3-cylinder engines is characterized by, in the rough forging step, each burr formed in the material (910) in the upset forging step is made to engage with the grooves (221) in the lower die (210) of the upset forging die (200) in the rough forging step, respectively, and the material (920) shaped in the upset forging step is position relative to the lower die (210) of the rough forging die (200).
Description
Technical field
The present invention relates to the manufacture method of a kind of bent axle.
Background technology
The manufacture method (such as patent documentation 1) of the most known a kind of three-cylinder engine bent axle in upright arrangement.Triplex in upright arrangement
1st pin of the bent axle of electromotor, the 2nd pin and the 3rd pin, due to blast interval, are arranged in axle with the interval of 120 degree
In the circumference of neck shaft core.So, the bent axle for three-cylinder engine in upright arrangement is complex-shaped, by hot-forging forming bent axle
In the case of, it is difficult to make the bent axle directly demoulding from mould of shape.Therefore, it is shaped to the easy demoulding in employing
The mould of shape material is carried out forging molding after, implement distortion processing, this distortion is processed with journal shaft
Centered by axle center, respectively to reverse clockwise and counterclockwise every time the angle of regulation, such as 60 °.
In forging molding, in the situation not carrying out distortion processing and the bent axle of three-cylinder engine in upright arrangement is shaped
Under, due to the 1st pin, the 2nd pin and the phase place of the 3rd pin, the split position of mould produces difference of height (the most special
Profit document 2).Additionally, suppress less technology as the burr for producing in forging molding, known one exists
The technology (such as patent documentation 3) tilting jump face is formed on mould.
Prior art literature
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2012-86265 publication
Patent documentation 2: Japanese Laid-Open Patent Publication 58-132342 publication
Patent documentation 3: Japanese Patent Publication 62-45009 publication
Summary of the invention
Invent problem to be solved
In forging molding, in the situation not carrying out distortion processing and the bent axle of three-cylinder engine in upright arrangement is shaped
Under, as it was previously stated, produce difference of height on the split position of mould.Therefore, forging molding is implemented roller-compaction work
When sequence, roughing molding procedure and polish molding procedure, when material is sent to next process from each operation
The material location relative to mould must be carried out.For this location, it is necessary to the burr produced in each operation of forging are set
Put jump etc. to tackle.But, in this case, owing to burr must be made energetically to produce, it may occur that yield rate
Lower degradation unfavorable condition.
It is an object of the invention to provide the manufacture method of a kind of bent axle, the manufacture method of this bent axle can be in each operation
It is easily positioned material, and decrease in yield can be suppressed.
For solving the means of problem
In order to achieve the above object, the present invention provides the manufacture method of a kind of bent axle, enters in the manufacture method of this bent axle
Row has roller-compaction operation, roughing molding procedure and the forge hot of polish molding procedure, the manufacture of described bent axle
Method is characterised by, in described roller-compaction operation, by cylindrical billet (billet the most described later (material)
910) as raw material, use and there is lower mold (lower mold 110 the most described later) and the roller-compaction mould of upper mold
(roller-compaction mould 100 the most described later), according to the shape of each bent axle, makes the billet molding as material
For being similar to the shape of the finished form of bent axle, in described roughing molding procedure, use and there is lower mold (after such as
The lower mold 210 stated) and the roughing mold for forming (roughing mold for forming 200 the most described later) of upper mold, make
The material (material 920 the most described later) of molding in described roller-compaction operation is shaped to more be similar to the one-tenth of bent axle
The shape of product shape, in described polish molding procedure, use have lower mold (lower mold 310 the most described later) and
The polish mold for forming (polish mold for forming 300 the most described later) of upper mold, makes described roughing molding
In operation, the material of molding is shaped to the finished form with the bent axle of allowance, as described roller-compaction mould
Lower mold, the lower mold of described roughing mold for forming, the lower mold of described polish mold for forming, use following this
The lower mold of sample: in vertical direction, (the most described later in the journal shaft forming part that the journal shaft of bent axle is shaped
Journal shaft forming part 112,212) lower section, be arranged with the to bent axle the 2nd pin be shaped the 2nd pin forming part
(the 2nd pin forming part 114,214 the most described later), is formed with the groove connected with described 2nd pin forming part (such as
Dovetail groove 121,221 described later), described groove caves in vertical lower section, and along described roller-compaction mould, institute
State each die joint (die joint the most described later of roughing mold for forming and described polish mold for forming
111,211) extending, described groove, at least formed with a pair, produces the hair that the 2nd pin with bent axle is connected in described groove
Limit (burr 931 the most described later), as the lower mold of described roughing mold for forming, under employing is the most such
Mould: be positioned at the bottom surface with the described groove on the direction axially intersected of described 2nd pin forming part and there is inclined plane (such as
Inclined plane S described later), described inclined plane suppresses material from described groove along the typing of described roughing mold for forming
The generation of the burr that surface current goes out and constitutes, in described roughing molding procedure, makes in described roller-compaction operation in institute
State each described burr being formed on material in the described groove of the lower mold of roller-compaction mould respectively with described roughing
The described groove engaging of the lower mold of mold for forming, makes the material of molding in described roller-compaction operation slightly add relative to described
The lower mold location of work mold for forming.
According to the present invention, by being supported burr by least one pair of groove, it is possible to relative to the lower mold of roughing mold for forming
Locator material such that it is able to stably supporting material in the lower mold of roughing mold for forming.Additionally, utilize
The generation of the burr that face can suppress material to go out from concentrated flow and constitute.Therefore, it is possible to suppression decrease in yield.It addition,
On a pair groove, only forming inclined plane, in the case of other parts are formed without inclined plane, it is possible to during suppression forging
Load becomes big.Additionally, with form inclined plane on the 2nd pin groove that connect of forming part in the case of, it is possible to suppression ought be with
The 2nd adjacent arm of pin is not provided with producing of burr during counterweight and becomes situation how.Accordingly, because can suppress burr from
Roughing mould stretches out, it is thus possible to the mould being used in other operations is adjacent to configuration, further, it is possible to suppression
During forged article transmission etc., burr cause the situation of obstacle.Furthermore it is possible to the generation of suppression burr, correspondingly can be efficient
And easily at the intracavity packing material of mould.
Further, in described roller-compaction operation, as the lower mold of described roller-compaction mould, employing is following so
Lower mold (lower mold 110 the most described later): by the 1st pin forming part (the most described later 1st pin forming part 113)
The region surrounded with arm forming part (arm forming part 116 the most described later) has the 1st and rolls mould tabular surface
(the most described later 1st rolls mould tabular surface 124), described 1st pin forming part is sold into the 1st of bent axle the
Type, the arm adjacent with the 1st pin of bent axle is shaped by described arm forming part, by the 3rd pin forming part (example
The 3rd pin forming part 115 as be described hereinafter) district that surrounds with arm forming part (arm forming part 118 the most described later)
Territory has the 3rd and rolls mould tabular surface (the most described later 3rd rolls mould tabular surface 125), described 3rd pin
3rd pin of bent axle is shaped by forming part, and the arm adjacent with the 3rd pin of bent axle is carried out by described arm forming part
Molding, in described roughing molding procedure, as the lower mold of described roughing mold for forming, employing is following so
Lower mold 210: by the 1st pin forming part (the most described later 1st pin forming part 213) and arm forming part (example
Arm forming part 216 as be described hereinafter) region that surrounds has the 1st preform moulds tabular surface (the most described later
1 preform moulds tabular surface 224), the 1st pin of bent axle is shaped by described 1st pin forming part, and described arm becomes
The arm adjacent with the 1st pin of bent axle is shaped by type portion, by the 3rd pin forming part the (the most described later 3rd
Pin forming part 215) region that surrounds with arm forming part (arm forming part 218 the most described later) has the 3rd
Preform moulds tabular surface (the 3rd preform moulds tabular surface 225 the most described later), described 3rd pin forming part pair
3rd pin of bent axle is shaped, and the arm adjacent with the 3rd pin of bent axle is shaped by described arm forming part, from
The die joint of the lower mold of described roller-compaction mould to the described 1st roll the degree of depth of mould tabular surface with from described slightly
The die joint of the lower mold of machine-shaping mould is identical, from described stone roller to the degree of depth of described 1st preform moulds tabular surface
The die joint of the lower mold of molded mould to described 3rd degree of depth rolling mould tabular surface becomes with from described roughing
The die joint of the lower mold of type mould is identical to the degree of depth of described 3rd preform moulds tabular surface.
Thus in roller-compaction operation, it is possible to roll mould tabular surface and the 3rd the 1st and roll mould tabular surface and upload
Put the billet as material, therefore, it is possible to make cylinder with the position relationship the most consistent with the axle center of journal shaft forming part
The billet of shape is arranged in roller-compaction mould.Therefore, it is possible to the axle center of the billet of suppression cylinder is relative to axle journal
The axle center of axle forming part becomes the decrease in yield that the position relationship of inclination is caused.
Additionally, in roughing molding procedure, the burr of material are divided by a pair groove of the lower mold of roughing mold for forming
Not supporting, meanwhile, the 1st preform moulds tabular surface bearing surface of material, the 3rd preform moulds tabular surface support
Junction is supported by the 1st preform moulds tabular surface, the 3rd preform moulds tabular surface respectively.I.e., it is possible to utilize and slightly add
Four part supporting materials altogether of work mold for forming.Therefore, it is possible to do not produce loosely relative to roughing molding
With the lower mold locator material of mould such that it is able to stably supporting material in the lower mold of roughing mold for forming.
Further, in described polish molding procedure, as the lower mold of described polish mold for forming, below employing
Such lower mold (lower mold 310 the most described later): by the 1st pin forming part (the 1st pin forming part the most described later
313) region surrounded with arm forming part (arm forming part 316 the most described later) has the 1st material supporting
Portion's (the 1st material support 324 the most described later), the 1st pin of bent axle is shaped by described 1st pin forming part,
The arm adjacent with the 1st pin of bent axle is shaped by described arm forming part, is being sold forming part (after such as by the 3rd
The 3rd pin forming part stated) region that surrounds with arm forming part has the 3rd material support, the described 3rd sells into
3rd pin of bent axle is shaped by type portion, and the arm adjacent with the 3rd pin of bent axle is become by described arm forming part
Type, from the degree of depth of the die joint of the lower mold of described polish mold for forming to described 1st material support with from described
The die joint of the lower mold of roughing mold for forming is identical, from described to the degree of depth of described 1st preform moulds tabular surface
The die joint of the lower mold of polish mold for forming becomes to the degree of depth of described 3rd material support with from described roughing
The die joint of the lower mold of type mould is identical to the degree of depth of described 3rd preform moulds tabular surface.
Thus in polish molding procedure, the burr of material are finish-machined at least one pair of groove of the lower mold of type mould
Support respectively, meanwhile, the 1st material support bearing surface of material, the 3rd material support bearing surface respectively by
The prominent end face of the 1st material support, the jag surface bearing of the 3rd material support.I.e., it is possible to utilize polish
Four part supporting materials altogether of mold for forming.Use relative to polish molding loosely therefore, it is possible to do not produce
The lower mold locator material of mould such that it is able to stably supporting material in the lower mold of polish mold for forming.
The effect of invention
In accordance with the invention it is possible to provide the manufacture method of a kind of bent axle, the manufacture method of this bent axle can be in each operation
It is easily positioned material, and decrease in yield can be suppressed.
Accompanying drawing explanation
Fig. 1 be the three-cylinder engine bent axle in upright arrangement illustrating an embodiment of the invention manufacture method in use
The roller-compaction top view of the lower mold 110 of mould 100.
Fig. 2 is the stone roller of the manufacture method of the three-cylinder engine bent axle in upright arrangement being shown in an embodiment of the invention
In molded operation, billet 910 is placed in the 1st of the lower mold 110 of roller-compaction mould 100, and to roll mould smooth
The amplification view of the state on face 124.
Fig. 3 be the three-cylinder engine bent axle in upright arrangement illustrating an embodiment of the invention manufacture method in use
The top view of lower mold 210 of roughing mold for forming 200.
Fig. 4 is the thick of the manufacture method of the three-cylinder engine bent axle in upright arrangement being shown in an embodiment of the invention
In machine-shaping operation, material 920 is placed in the 1st roughing mould of the lower mold 210 of roughing mold for forming 200
The amplification view of the state on tool tabular surface 224.
Fig. 5 be the three-cylinder engine bent axle in upright arrangement illustrating an embodiment of the invention manufacture method in use
The amplification view of inclined plane S of roughing mold for forming 200.
Fig. 6 be the three-cylinder engine bent axle in upright arrangement illustrating an embodiment of the invention manufacture method in use
The lower mold 210 of roughing mold for forming 200 and the top view of material.
Fig. 7 is the sectional view of the line B-B along Fig. 6.
Fig. 8 is the sectional view of the line A-A along Fig. 6.
Fig. 9 is the sectional view of the line C-C along Fig. 6.
Figure 10 is the essence of the manufacture method of the three-cylinder engine bent axle in upright arrangement being shown in an embodiment of the invention
In machine-shaping operation, material 930 is placed in the 1st material supporting of the lower mold 310 of polish mold for forming 300
The amplification view of the state in portion 324.
Label declaration
100: roller-compaction mould；
110: lower mold；
111,211: die joint；
112,212: journal shaft forming part；
113: the 1 pin forming parts；
114,214: the 2 pin forming part；
115: the 3 pin forming parts；
116: arm forming part；
118: arm forming part；
121,221: dovetail groove (groove)；
125: the 3 roll mould tabular surface；
200: roughing mold for forming；
210: lower mold；
213: the 1 pin forming parts；
215: the 3 pin forming parts；
216: arm forming part；
218: arm forming part；
223: inclined plane；
224: the 1 preform moulds tabular surfaces；
225: the 3 preform moulds tabular surfaces；
300: polish mold for forming；
310: lower mold；
313: the 1 pin forming parts；
316: arm forming part；
324: the 1 material supports；
910: billet (material)；
920: material；
931: burr.
Detailed description of the invention
While referring to the drawings while an embodiment of the invention is described in detail.
Fig. 1 be the three-cylinder engine bent axle in upright arrangement illustrating an embodiment of the invention manufacture method in use
The roller-compaction top view of the lower mold 110 of mould 100.Fig. 2 is shown in an embodiment of the invention
In the roller-compaction operation of the manufacture method of three-cylinder engine bent axle in upright arrangement, billet 910 is placed in roller-compaction mould
The amplification view of the state on mould tabular surface 124 is rolled in the 1st of the lower mold 110 of tool 100.Fig. 3 is to illustrate this
The roughing forming mould used in the manufacture method of the three-cylinder engine bent axle in upright arrangement of one embodiment of invention
The top view of the lower mold 210 of tool 200.
Fig. 4 is the thick of the manufacture method of the three-cylinder engine bent axle in upright arrangement being shown in an embodiment of the invention
In machine-shaping operation, material 920 is placed in the 1st roughing mould of the lower mold 210 of roughing mold for forming 200
The amplification view of the state on tool tabular surface 224.Fig. 5 is the triplex in upright arrangement illustrating an embodiment of the invention
The amplification view of inclined plane S of the roughing mold for forming 200 used in the manufacture method of electromotor bent axle.
Fig. 6 be the three-cylinder engine bent axle in upright arrangement illustrating an embodiment of the invention manufacture method in use thick
The machine-shaping lower mold 210 of mould 200 and the top view of material.Fig. 7 is the sectional view of the line B-B along Fig. 6.
Fig. 8 is the sectional view of the line A-A along Fig. 6.Fig. 9 is the sectional view of the line C-C along Fig. 6.Figure 10 is to be shown in
In the polish molding procedure of the manufacture method of the three-cylinder engine bent axle in upright arrangement of an embodiment of the invention, material
Putting of state on 1st material support 324 of the lower mold 310 that material 930 is placed in polish mold for forming 300
Big sectional view.
The bent axle using the manufacture method of three-cylinder engine bent axle in upright arrangement of present embodiment and forge is at automobile etc.
In internal combustion engine (electromotor), collaboratively the reciprocating motion of piston is converted to rotary motion with connecting rod.Bent axle is configured to
For three-cylinder engine in upright arrangement.
Bent axle is to be formed by the forge hot carried out in the manufacture method at the three-cylinder engine bent axle in upright arrangement of present embodiment
Type.Forge hot has roller-compaction operation, roughing molding procedure and polish molding procedure.In roller-compaction work
In sequence, have employed and there is lower mold 110 and the roller-compaction mould 100 of upper mold (not shown).In roughing molding
In operation, have employed the roughing mold for forming 200 with lower mold 210 and upper mold 250.In polish molding work
In sequence, have employed and there is lower mold 310 and the polish mold for forming 300 of upper mold (not shown).
First, the roller-compaction mould 100 used in roller-compaction operation is illustrated.Roller-compaction mould
100 according to the shape of each bent axle, makes the cylindrical billet 910 as material (with reference to the line D-D along Fig. 1
Amplification view, i.e. Fig. 2) it is shaped to be similar to the shape of the finished form of bent axle.
As it is shown in figure 1, the lower mold 110 of roller-compaction mould 100 has lower mold die joint 111, journal shaft molding
Portion the 112, the 1st pin forming part the 113, the 2nd pin forming part the 114, the 3rd pin forming part 115, arm forming part 116,
117,118, counterweight part forming part 119, dovetail groove 121, convex shaped part the 122,123, the 1st roll mould tabular surface
124 and the 3rd rolls mould tabular surface 125.
In roller-compaction operation, when lower mold 110 and the upper mold of roller-compaction mould 100 clip the base as material
When ingot 910 is shaped, a part for die joint 111 abuts with the upper mold die joint of upper mold (not shown).Axle journal
Axle forming part 112 in bent axle so that the part in the cylinder block of electromotor, i.e. journal shaft can be supported in the way of rotating
(not shown) is shaped.Journal shaft forming part 112 is formed as having in lower mold 110 mutually joins across compartment of terrain
Put position relationship on the same axis, mutually configure on the same axis across compartment of terrain so that multiple journal shaft has
Position relationship.Each journal shaft forming part 112 of lower mold 110 has generally cylindrical shaped with cutting containing its axle center
Face cutting and the shape that obtains, thus each by each journal shaft forming part 112 of lower mold 110 and upper mold (not shown)
Journal shaft forming part defines substantial cylindrical.
1st pin forming part the 113, the 2nd pin forming part the 114, the 3rd pin forming part 115 is respectively configured at axle journal
On the axis direction (left and right directions of Fig. 1) of axle forming part 112, in the position, axle center of deviation journal shaft forming part 112
The position put, lays respectively between multiple journal shaft forming part 112.1st pin forming part 113 makes and piston
Connecting rod connect bent axle the 1st pin molding.Similarly, make the connecting rod with piston even in the 2nd pin forming part 114
2nd pin molding of the bent axle connect, at the 3rd the 3rd pin selling the bent axle making the connecting rod with piston be connected in forming part 115
Molding.
2nd pin forming part 114 is arranged in the journal shaft forming part that the journal shaft to bent axle is shaped in vertical direction
The lower section of 112.Specifically, the 2nd pin forming part 114 is in journal shaft forming part 112 and journal shaft forming part 112
Between, from the shaft core position of the journal shaft forming part 112 with the position relationship consistent with die joint 111 to vertical
Cave in and formed in side.
On the other hand, the 1st pin forming part 113 is formed as having following position relationship: when from journal shaft forming part 112
The bearing of trend in axle center just look at the direction observation by front of the 1st pin forming part 113 to the 2 pin forming part 114 up
Time (during to observe from the direction of the from left to right of Fig. 1), the 1st pin forming part 113 with journal shaft forming part 112
Centered by axle center, relative to the 2nd pin forming part 114 counterclockwise along week in axle center of journal shaft forming part 112
Phase place to skew 120 °.Therefore, in the 1st pin forming part 113 of lower mold 110, the 1st pin is only molded very
A few part, the molding in the 1st pin forming part of upper mold (not shown) of the major part of the 1st pin.
Similarly, the 3rd pin forming part 115 is formed as having following position relationship: when from journal shaft forming part 112
When the bearing of trend in axle center just looks at the direction observation that the 1st pin forming part 113 to the 2 pin forming part 114 leans on front up
(during to observe from the direction of the from left to right of Fig. 1), the 3rd pin forming part 115 is with the axle of journal shaft forming part 112
Centered by the heart, relative to the 2nd pin forming part 114 clockwise along the circumference in axle center of journal shaft forming part 112
Offset the phase place of 120 °.Therefore, in the 3rd pin forming part 115 of lower mold 110, the little of the 3rd pin is only molded
A part, the molding in the 3rd pin forming part of upper mold (not shown) of the major part of the 3rd pin.
Arm forming part 116,117,118 to respectively with the 1st of bent axle the pin, the 2nd pin, the 3rd pin integrated
Arm is shaped.Axis direction (Fig. 1 of arm forming part 116,117,118 connection journal shaft forming part 112
Left and right directions) on the 1st pin forming part the 113, the 2nd pin forming part the 114, the 3rd pin forming part 115 each
End and journal shaft forming part 112 so that arm to the direction the most orthogonal with journal shaft from the 1st pin, the
2 pins, the 3rd pin extend to journal shaft a pair and one-body molded with journal shaft respectively over the ground.
Counterweight part is shaped by counterweight part forming part 119, and this counterweight part is substantially orthogonal with journal shaft from journal shaft edge
Direction plate-like extends towards the direction left from the 1st pin, the 3rd pin respectively.Counterweight forming part 119 is formed as respectively
Connect with arm forming part 116,118 and width is wider than arm forming part 116,118, so that counterweight part and arm one
Body formed and be shaped to width and be wider than the tabular of arm.Arm forming part 116,118 is to be formed in pairs, and arm becomes
Type portion 116,118 is formed in pairs so that counterweight part integrated with each arm is also formed for a pair over the ground respectively.It addition,
The most one-body molded counterweight part on integrated arm is being sold with the 2nd.Therefore, do not formed and connect with arm forming part 117
Counterweight part forming part.
Dovetail groove 121 has following such trapezoidal shape: the cross section orthogonal with the length direction of dovetail groove 121 along with
It is tapered close to bottom land (with reference to the roughing forming mould roughly the same with dovetail groove 121 shape shown in Fig. 9
The dovetail groove 221 of the lower mold 210 of tool 200).Dovetail groove 121 caves in the most vertical lower section of forming direction, and along
The die joint 111 of roller-compaction mould 100 to the direction orthogonal with the axis direction of journal shaft forming part 112, i.e.
Extend in couples in the way of separated from one another to the above-below direction of Fig. 1.The base end part of dovetail groove 121 and the 2nd pin molding
Portion 114 connects.The dovetail groove 121 projecting end on the direction along die joint 111 is positioned at the edge of lower mold 110.
When the billet 910 as material passes through roller-compaction with mould 100 molding, a part of material enters dovetail groove 121.
Thus, the burr that the 2nd pin with bent axle is connected are produced.The a part of material i.e. entering dovetail groove 121 becomes burr
A part.
Convex shaped part 122,123 to vertical protruding above, and along roller-compaction with the die joint 111 of mould 100 to
The direction orthogonal with the axis direction of journal shaft forming part 112, i.e. extend the most in couples to the lower section of Fig. 1, top.
The base end part of the convex shaped part 122 extended to the lower section of Fig. 1 and the 1st pin forming part 113 connect, and convex shaped part 122 is on edge
The edge of downside that the projecting end on the direction of die joint 111 is positioned at Fig. 1 of lower mold 110.To the top of Fig. 1
The base end part of the convex shaped part 123 extended and the 3rd pin forming part 115 connect, and convex shaped part 123 is along die joint 111
Direction on projecting end be positioned at the edge of upside of Fig. 1 of lower mold 110.Therefore, as in figure 2 it is shown, with axle
In the cross section of the lower mold 110 that the axle center of neck axle forming part 112 is orthogonal, from convex shaped part 122 to the 1st pin forming part 113
Define downward inclination.
Further, in the top view shown in Fig. 1, by be positioned in inclination the 1st pin forming part 113, to bent axle with
1st pin a pair arm forming part 116 being shaped of adjacent pair arm and with a pair arm forming part 116
The portion in the region of the lower mold 110 that connection a pair counterweight part forming part 119 being shaped a pair counterweight part surround
Point, i.e. the part in the left side from terminating downward-sloping part shown in Fig. 2 has the 1st and rolls mould tabular surface
124.1st rolls mould tabular surface 124 in roller-compaction operation, as the part from the 1st pin to counterweight part
Material part on form the 1st preform moulds tabular surface bearing surface 921 (with reference to Fig. 4) being made up of tabular surface.
About the convex shaped part 123 being connected with the 3rd pin forming part 115 similarly, as it is shown in figure 1, sold into by the 3rd
Type portion 115, to bent axle with the 3rd pin a pair arm forming part 118 being shaped of adjacent pair arm and
The a pair counterweight part forming part 119 connected with a pair arm forming part 118 and be shaped a pair counterweight part surrounds
The part in the region of lower mold 110 has the 3rd and rolls mould tabular surface 125.3rd rolls mould tabular surface 125 is grinding
In molded operation, it is being made up of tabular surface with being formed in the 3rd pin material part suitable to the part of counterweight part
3rd preform moulds tabular surface bearing surface (not shown).
Journal shaft forming part the 112, the 1st pin forming part the 113, the 2nd pin forming part the 114, the 3rd pin forming part 115,
Arm forming part 116,117,118, counterweight part forming part the 119, the 1st roll mould tabular surface 124 and the 3rd
Roll mould tabular surface 125 and constitute a part for chamber, this chamber in roller-compaction operation from the billet as material
910 mold the part becoming bent axle.
It addition, the part of the upper mold of roller-compaction mould 100 (not shown), i.e. in roller-compaction operation from material
The part being positioned in upper mold of chamber that material molds the part becoming bent axle is configured to: to bent axle in lower mold 110
Part outside a part for molding is shaped.That is, the journal shaft that upper mold (not shown) has with lower mold 110 becomes
The journal shaft forming part that type portion 112 is same.It addition, upper mold (not shown) have relative with lower mold die joint 111 also
The upper mold die joint abutted.And, upper mold has not shown the 1st and sells forming part, the 3rd pin forming part, arm one-tenth
Type portion and counterweight part forming part, they to not by lower mold 110 molding the 1st pin part, the 3rd pin part,
The part of arm and the part of counterweight part are shaped.
Additionally, upper mold is formed with trapezoidal protuberance and concave groove, described trapezoidal protuberance is trapezoidal with formed in lower mold 110
Groove 121 engages, and has the shape more smaller than dovetail groove 121, and described concave groove is convex with formed in lower mold 110
Shape portion 122 engages, and more bigger than convex shaped part 122.
Then, the roughing mold for forming 200 used in roughing molding procedure is illustrated.Roughing molding
The material 920 making molding in roller-compaction operation with mould 200 is shaped to the shape closer to the bent axle as finished product
Shape.Therefore, the lower mold 210 of roughing mold for forming 200 and the roller-compaction lower mold 110 of mould 100
Similarly, have lower mold die joint 211, journal shaft forming part the 212, the 1st pin forming part the 213, the 2nd sells molding
Portion the 214, the 3rd pin forming part 215, arm forming part 216,217,218 and counterweight part forming part 219.This
Material can be shaped by a little parts to be more similar to the shape of each several part shape of the bent axle as finished product.Omit
About the explanation of these parts roughly the same with the structure of roller-compaction mould 100, below in addition with
The characteristic structural of the roughing mold for forming 200 that the structure of roller-compaction mould 100 is different illustrates.
Such as Fig. 5, i.e. along shown in the sectional view of the F-F line of Fig. 3, the lower mold 210 of roughing mold for forming 200
The bottom surface of dovetail groove 221 has inclined plane S.Inclined plane S is present in the bottom surface of dovetail groove 221, is i.e. positioned at and the 2nd
The bottom surface of the dovetail groove 221 in the most orthogonal direction (top in Fig. 3, lower section) of pin forming part 214.Tilt
Face S has the position relationship orthogonal with the bearing of trend of dovetail groove 221 (above or below in Fig. 3), to traverse
The mode of dovetail groove 221 exists.Therefore, as it is shown in figure 5, with inclined plane S as border, be located remotely from the 2nd pin-shaped
The bottom surface of the dovetail groove 221 of the side in one-tenth portion is relative to the dovetail groove 221 of the side being located adjacent to the 2nd pin forming portion
Bottom surface, there is the position relationship exceeding a section in vertical direction.That is, to cutting along the line A-A shown in Fig. 6
Burr in dovetail groove 221 in face 931 (with reference to Fig. 8) and trapezoidal along the cross section of the line B-B shown in Fig. 6
Burr 931 (with reference to Fig. 7) in groove 221 compare, then be configured to the hair formed in the bottom of dovetail groove 221
The position of the height on limit 931 is different.
The dovetail groove 221 of the lower mold 210 of roughing mold for forming 200, the portion that is equivalent to a pair trapezoidal hypotenuse
Points 220 (with reference to Fig. 8 etc.), relative to the inclination angle of vertical direction (above-below direction of Fig. 8) and suitable with it
Roller-compaction mould 100 lower mold 110 dovetail groove 121, the part that is equivalent to trapezoidal two hypotenuse (not
Diagram), identical relative to the inclination angle of vertical direction.
It addition, as it is shown in figure 5, engage with the dovetail groove 221 of the lower mold 210 of roughing mold for forming 200,
The bottom of the trapezoidal protuberance of the upper mold (not shown) of roughing mold for forming 200 has and is similar to lower mold 210
Dovetail groove 221 and the shape of inclined plane S.Inclined plane S suppression burr in roughing molding procedure produce and from ladder
The burr diffusion that shape groove 221 flows out along die joint 211 and spreads, the generation of suppression burr.
As it is shown on figure 3, the convex shaped part 222,223 of the lower mold 210 of roughing mold for forming 200 and roller-compaction
With the convex shaped part 122,123 of the lower mold 110 of mould 100 similarly, to vertical protruding above, and along roughing
The die joint 211 of mold for forming 200 is to the direction orthogonal with the axis direction of journal shaft forming part, i.e. to Fig. 3's
Lower section, top each extend over.The base end part of the convex shaped part 222 extended to the lower section of Fig. 1 and the 1st pin forming part 213
Connection, the projecting end along die joint 211 of convex shaped part 222 is positioned at the edge of the downside of Fig. 3 of lower mold 210.
Connect to base end part and the 3rd pin forming part 215 of the convex shaped part 223 extended above of Fig. 3, the edge of convex shaped part 223
The edge of upside that the projecting end of die joint 211 is positioned at Fig. 3 of lower mold 210.Therefore, as in roughing molding
With under the state having loaded material 920 in the lower mold 210 of mould 200, along Fig. 6 E-E line amplification cross section i.e.
Shown in Fig. 4, in the cross section of the lower mold 210 orthogonal with the axle center of journal shaft forming part 212, from convex shaped part 222
Downward inclination is defined to the 1st pin forming part 213.
Further, in the top view shown in Fig. 3, by be positioned in inclination the 1st pin forming part 213 and to bent axle with
The region part of the lower mold 210 that a pair arm forming part 216 that the 1st pin adjacent pair arm is shaped surrounds,
I.e. in lower mold 210 from shown in Fig. 4 terminate downward-sloping part the part in left side there is the 1st roughing mould
Tool tabular surface 224.On forming direction i.e. vertical direction, from the lower mold 110 of aforesaid roller-compaction mould 100
Die joint 111 roll the degree of depth of mould tabular surface 124 and the lower mold from roughing mold for forming 200 to the 1st
The die joint 211 of 210 is identical to the degree of depth of the 1st preform moulds tabular surface 224.
It addition, the dovetail groove 221 of roughing mold for forming 200 in vertical direction is smooth with the 1st preform moulds
The position relationship in face 224 and the dovetail groove 121 and the 1st of roller-compaction mould 100 roll mould tabular surface 124
Position relationship identical.In roughing molding procedure, the 1st preform moulds tabular surface bearing surface 921 and the 1st
Preform moulds tabular surface 224 is abutted by face, and the 1st preform moulds tabular surface bearing surface 921 is by roller-compaction
The tabular surface being formed in operation on material is constituted.Further, the 1st preform moulds tabular surface 224 is in roughing molding
In operation, the material part suitable to the part of arm with from the 1st pin forms the 1st material being made up of tabular surface
Support bearing surface 932 (with reference to Figure 10).
Further, the part of counterweight part forming part 219 is more leaned on than the 1st preform moulds tabular surface 224, i.e. shown in Fig. 4
The keep left part of side of ratio the 1st preform moulds tabular surface 224 be also formed with from the 1st preform moulds tabular surface 224
The inclination declined, the part surrounded by counterweight part in declining the part of end, i.e. top view shown in Fig. 3, also shape
Become to have the tabular surface 226 for a part for counterweight part is shaped.
About terminating convex shaped part 223 that downward-sloping part is connected with the 3rd pin forming part 215 similarly, scheming
In top view shown in 3, by the 3rd pin forming part 215 and becoming with the 3rd pin adjacent pair arm bent axle
The part in the region of the lower mold 210 that a pair arm forming part 218 of type surrounds has the 3rd preform moulds tabular surface
225 (with reference to Fig. 3).On forming direction i.e. vertical direction, from the lower mold 110 of aforesaid roller-compaction mould 100
Die joint 111 roll the degree of depth of mould tabular surface 125 and the lower mold from roughing mold for forming 200 to the 3rd
The die joint 211 of 210 is identical to the degree of depth of the 3rd preform moulds tabular surface 225.
It addition, the dovetail groove of roughing mold for forming 200 in vertical direction and the 3rd preform moulds tabular surface
The position relationship of 225 and the dovetail groove the 121 and the 3rd of roller-compaction mould 100 roll the position of mould tabular surface 125
Put relation identical.In roughing molding procedure, the 3rd preform moulds tabular surface bearing surface (not shown) and the 3rd
Preform moulds tabular surface 225 is abutted by face, and the 3rd preform moulds tabular surface bearing surface is by roller-compaction operation
In the tabular surface that is formed on material constitute.Further, the 3rd preform moulds tabular surface 225 is in roughing molding procedure
In, the material part suitable to the part of arm with from the 3rd pin is formed the 3rd material supporting being made up of tabular surface
Portion's bearing surface (not shown).
Further, than the 3rd preform moulds tabular surface 225 more by counterweight part forming part 219 (lower section in Fig. 1)
Part is also formed with the inclination declined from the 3rd preform moulds tabular surface 225, is declining part, the i.e. Fig. 3 terminated
The part surrounded by counterweight part forming part 219 in shown top view, is also formed with for entering a part for counterweight part
The tabular surface 227 of row molding.
Then, the polish mold for forming 300 used in polish molding procedure is illustrated.Polish molding
The material of molding in roughing molding procedure is made to be shaped to the bent axle with allowance with mould 300 (with reference to Figure 10)
Finished form.Therefore, the lower mold 310 of polish mold for forming 300 and roughing mold for forming 200 times
Mould 210 similarly, has lower mold die joint (not shown), journal shaft forming part (not shown), the 1st pin forming part
313, the 2nd pin forming part (not shown), the 3rd pin forming part (not shown), arm forming part 316, Yi Jipei
Weight portion forming part 319, they have each several part of the bent axle of allowance for molding.Thus, omit about with slightly
The explanation of these parts that the structure of machine-shaping mould 200 is roughly the same, below in addition and roughing
The characteristic structural of the polish mold for forming 300 that the structure of mold for forming 200 is different illustrates.
As shown in Figure 10, the convex shaped part 322 of the lower mold 310 of polish mold for forming 300 is used with roughing molding
The convex shaped part 222 of the lower mold 210 of mould 200 similarly, respectively to vertical protruding above, and along polish molding
Extend towards the direction orthogonal with the axis direction of journal shaft forming part (not shown) with the typing of mould 300.Therefore,
As shown in Figure 10, in the cross section of the lower mold 310 orthogonal with the axle center of journal shaft, from convex shaped part 322 to the 1st pin
Forming part 313 defines downward inclination.
Further, by the 1st pin forming part 313 being positioned in inclination and entering with the 1st pin adjacent pair arm bent axle
The region of the lower mold 310 that a pair arm forming part 316 of row molding surrounds (with in roughing molding procedure shown in Fig. 3
By the 1st pin forming part 213 and to bent axle with the 1st pin a pair arm molding being shaped of adjacent pair arm
The region that the region of the lower mold 210 that portion 216 surrounds is suitable) part, i.e. from shown in Figure 10 in lower mold 310
The part terminating the left side that downward-sloping part rises has tabular surface.Formed in the end by counterweight part of this tabular surface
There is the 1st material support 324.As shown in Figure 10, the 1st material support 324 is orthogonal with journal shaft forming part
Cross section in there is generally trapezoidal shape, and to vertical protruding above.On forming direction i.e. vertical direction, from finishing
The die joint (not shown) of the lower mold 310 of work mold for forming 300 is to the prominent end face of the 1st material support 324
The die joint 211 of the degree of depth and lower mold 210 from roughing mold for forming 200 to the 1st preform moulds tabular surface
The degree of depth of 224 is identical.
It addition, the dovetail groove (not shown) of polish mold for forming 300 in forming direction i.e. vertical direction and the
The position relationship of the prominent end face of 1 material support 324 and the dovetail groove 221 of roughing mold for forming 200 and
The position relationship of 1 preform moulds tabular surface 224 is identical.1st material support bearing surface 932 is connected to the 1st material
On the prominent end face of material support 324, the 1st material support bearing surface 932 is formed by roughing molding procedure
Tabular surface on material is constituted.
The dovetail groove 221 of the lower mold 210 of roughing mold for forming 200, the portion that is equivalent to trapezoidal two hypotenuse
Points 220 (with reference to Fig. 8 etc.), relative to the inclination angle of vertical direction (above-below direction of Fig. 8) and suitable with it
Polish mold for forming 300 lower mold 310 dovetail groove, the part that is equivalent to trapezoidal two hypotenuse,
Identical relative to the inclination angle of vertical direction.
Additionally, more leaning on the part of counterweight part forming part 319 than the 1st material support 324, i.e. shown in Figure 10
Ratio the 1st material support 324 keep left the part of side, be also formed with for a part for counterweight part is shaped
Tabular surface 325.
It follows that to the roller-compaction mould 100, roughing mold for forming 200 and the essence that use said structure
The manufacture method of the three-cylinder engine bent axle in upright arrangement of machine-shaping mould 300 illustrates.
In the manufacture method of three-cylinder engine bent axle in upright arrangement, carrying out forge hot as previously mentioned, forge hot has roller-compaction
Operation, roughing molding procedure and polish molding procedure, and carry out forge hot in this order.
As in figure 2 it is shown, in roller-compaction operation, cylindrical billet 910 is rolled into as raw material, employing
Type mould 100 (with reference to Fig. 1), according to the shape of each bent axle, makes to be shaped to approximation as the billet 910 of material
Shape in the finished form of bent axle.Specifically, first, in lower mold 110, in the portion constituting a part of chamber
Point, the position relationship configuration the most consistent with the axle center of journal shaft forming part 112 of axle center using billet 910 is as material
Cylindrical billet 910.Now, as in figure 2 it is shown, billet 910 is carried near the 1st pin forming part 113
It is placed in the 1st to roll on mould tabular surface 124.Similarly, billet 910 is carried near the 3rd pin forming part 115
It is placed in the 3rd to roll on mould tabular surface 125.
So, billet 910 is placed in the 1st and rolls mould tabular surface 124 and the 3rd and roll mould tabular surface 125
On, therefore as the axle center in axle center with billet 910 of the cylindrical billet 910 of material with journal shaft forming part 112
The most consistent position relationship is stably configured.In this condition, the die joint 111 of lower mold 110 is made with upper mold (not
Diagram) die joint close to each other and abut, thus carry out matched moulds, by lower mold 110 and upper mold (not shown) shape
In the chamber become, cylindrical billet 910 is shaped to be similar to the shape of the finished form of bent axle.Now, it is placed in
1st rolls mould tabular surface the 124, the 3rd part rolling the material on mould tabular surface 125 is rolled mould by the 1st
Tabular surface the 124, the 3rd rolls mould tabular surface 125 and presses.Thus, as shown in Figure 4, at these of material 920
It is formed in part with the 1st preform moulds tabular surface bearing surface the 921, the 3rd preform moulds being made up of respectively tabular surface
Tabular surface bearing surface (not shown).It addition, be formed with trapezoidal burr in dovetail groove 121 (shown in Fig. 8
The burr that trapezoidal burr in roughing molding procedure are same).
Then, in roughing molding procedure, use roughing mold for forming 200, make roller-compaction operation becomes
The material 920 of type is shaped to more be similar to the shape of the finished form of bent axle.Specifically, first, will be rolled into
The material 920 of molding in type operation is arranged in a part of chamber of composition in the lower mold 210 of roughing mold for forming 200
The part of room.
Now, shown as the lower mold 210 at roughing mold for forming 200 in the sectional view along the line C-C of Fig. 6
On loaded material 920 state Fig. 9 shown in, make in roller-compaction operation on roller-compaction mould 100 times
The a pair trapezoidal burr 931 being formed on material in the dovetail groove 121 of mould 110 respectively with roughing mold for forming
The dovetail groove 221 of the lower mold 210 of 200 engages.Meanwhile, make roller-compaction operation utilizes roller-compaction mould
The 1st of the lower mold 110 of tool 100 is rolled mould tabular surface the 124, the 3rd and is rolled the 1st of mould tabular surface 125 molding
Preform moulds tabular surface bearing surface the 921, the 3rd preform moulds tabular surface bearing surface (not shown) is respectively with the 1st
Preform moulds tabular surface the 224, the 3rd preform moulds tabular surface 225 abuts.
That is, as it is shown in figure 9, in the dovetail groove 221 of the lower mold 210 of roughing mold for forming 200, dovetail groove
At roller-compaction mould 100 in the part 220 being equivalent to trapezoidal two hypotenuse of 221 and roller-compaction operation
The part of two hypotenuses of the trapezoidal burr 931 being formed on material in the dovetail groove 121 of lower mold 110 is passed through respectively
Face abuts, and therefore, trapezoidal burr 931 reliably engage with dovetail groove 221, and material 920 is stably supported on slightly
The machine-shaping lower mold 210 of mould 200.It addition, the 1st preform moulds tabular surface bearing surface the 921, the 3rd is thick
Processing mold tabular surface bearing surface (not shown) respectively with the 1st preform moulds tabular surface the 224, the 3rd roughing mould
Tool tabular surface 225 is abutted by face.Thus, material is by a pair dovetail groove the 221, the 1st preform moulds tabular surface 224
And the 3rd preform moulds tabular surface 225 these four part supporting, will not produce loosening, relative to roughing molding
It is positioned by the lower mold 210 of mould 200, thus is stably bearing in the lower mold of roughing mold for forming 200
In 210.
In this condition, the die joint 211 making lower mold 210 is close to each other with the die joint of upper mold 250 (not shown)
And abut, thus carry out matched moulds, in the chamber formed by lower mold 210 and upper mold 250, material 920 is shaped to more
Add the shape of the finished form being similar to bent axle.Now, the 1st preform moulds tabular surface the 224, the 3rd it is placed in thick
The part of the material on processing mold tabular surface 225 is by the 1st preform moulds tabular surface the 224, the 3rd preform moulds
Tabular surface 225 presses, these the 1st material support bearing surfaces 932 being formed in part with being made up of tabular surface respectively,
3rd material support bearing surface (not shown).It addition, in the dovetail groove 221 of roughing mold for forming 200
It is formed with Fig. 7, trapezoidal burr as shown in Figure 8.Now, due to the lower mold of roughing mold for forming 200
Inclined plane S (with reference to Fig. 5) of the dovetail groove 221 of 210, the burr 931 spreading from dovetail groove 221 and flowing out are subject to
Resistance, it is suppressed that spread further, thus inhibit the generation of burr 931.Due to roughing mold for forming 200
Inclined plane S of dovetail groove 221, be formed with the part of inclined plane type in the stage casing of trapezoidal burr 931.
It follows that in polish molding procedure, use polish mold for forming 300, make roughing molding procedure
The material of middle molding is shaped to the finished form with the bent axle of allowance.Specifically, as shown in Figure 10, first
First, the material 920 of molding in roughing molding procedure is configured in the lower mold 310 of polish mold for forming 300
In the part constituting a part of chamber.
Now, the dovetail groove 221 of lower mold 210 at roughing mold for forming 200 in roughing molding procedure is made
In a pair trapezoidal burr being formed on material respectively with a pair ladder of the lower mold 310 of polish mold for forming 300
Shape groove (not shown) engages.Meanwhile, make in roughing molding procedure by roughing mold for forming 200 times
1st material of the 1st preform moulds tabular surface the 224, the 3rd preform moulds tabular surface 225 molding of mould 210 props up
Bearing portion bearing surface 932, the 3rd material support bearing surface (not shown) respectively with the 1st material support 324,
The prominent end face of 3 material supports (not shown) abuts.
That is, in the same manner as roughing molding procedure, in the dovetail groove of the lower mold 310 of polish mold for forming 300,
In the part being equivalent to trapezoidal two hypotenuse of the dovetail groove (not shown) of lower mold 310 and roughing molding procedure
The trapezoidal burr 931 being formed on material in the dovetail groove 221 of the lower mold 210 of roughing mold for forming 200
The part of two hypotenuses abutted by face respectively, therefore, trapezoidal burr reliably engage with dovetail groove 221, material
Material 930 is stably supported on the lower mold 310 of polish mold for forming 300.It addition, the 1st material support abuts
Face the 932, the 3rd material support bearing surface (not shown) props up with the 1st material support the 324, the 3rd material respectively
The prominent end face of bearing portion (not shown) is abutted by face.Thus, material 930 is same with the situation of roughing molding procedure
Sample ground, by a pair dovetail groove (not shown), the prominent end face of the 1st material support 324 and the supporting of the 3rd material
The prominent end face in portion (not shown) these four part supporting, will not produce loosening, relative to polish mold for forming
The lower mold 310 of 300 is positioned, thus by the lower mold 310 being stably bearing in polish mold for forming 300.
In this condition, the die joint (not shown) of lower mold 310 and the die joint phase mutual connection of upper mold (not shown) are made
Near and abut, thus carry out matched moulds, in the chamber formed by lower mold 310 and upper mold, material 930 is shaped to be had
The finished form of the bent axle of allowance.Now, trapezoidal due to the lower mold 310 at polish mold for forming 300
Being also formed with inclined plane in groove (not shown), the diffusion of burr is suppressed, thus inhibits the generation of burr.
According to present embodiment, play following effect.
In present embodiment, carrying out having roller-compaction operation, roughing molding procedure, polish molding procedure
In the manufacture method of the three-cylinder engine bent axle in upright arrangement of forge hot, in roller-compaction operation, by cylindrical billet
910 as raw material, uses and has lower mold 110 and the roller-compaction mould 100 of upper mold (not shown), according to
The shape of each bent axle, makes to be shaped to be similar to the shape of the finished form of bent axle as the billet 910 of material, slightly
In machine-shaping operation, use the roughing mold for forming 200 with lower mold 210 and upper mold, make roller-compaction work
The material 920 of molding in sequence is shaped to more be similar to the shape of the finished form of bent axle, in polish molding procedure
In, use the polish mold for forming 300 with lower mold 310 and upper mold, make molding in roughing molding procedure
Material 930 is shaped to the finished form with the bent axle of allowance.
As the roller-compaction lower mold 110 of mould 100, the lower mold 210 of roughing mold for forming 200, finishing
The lower mold 310 of work mold for forming 300, uses following such lower mold: in vertical direction, at the axle to bent axle
The arranged beneath of the journal shaft forming part that neck axle is shaped has the 2nd pin molding that the to bent axle the 2nd pin is shaped
Portion, is formed with the dovetail groove connected with the 2nd pin forming part, and this dovetail groove caves in vertical lower section, and along being rolled into
Each die joint of type mould 100, roughing mold for forming 200 and polish mold for forming 300 extends,
Dovetail groove, at least formed with a pair, produces the burr that the 2nd pin with bent axle is connected in dovetail groove.
As the lower mold 210 of roughing mold for forming 200, use following such lower mold: be positioned at and sell into the 2nd
The bottom surface of the dovetail groove 221 on the direction axially intersected in type portion 214 has inclined plane S, this inclined plane S suppression material
The product of the burr that material 920 flows out along the die joint 211 of roughing mold for forming 200 from dovetail groove 221 and constitutes
Raw.
In roughing molding procedure, make the ladder of lower mold 110 at roller-compaction mould 100 in roller-compaction operation
The each burr 931 being formed on material in shape groove 121 respectively with the ladder of the lower mold 210 of roughing mold for forming 200
Shape groove 221 engages, and makes the material 920 of molding in roller-compaction operation relative to roughing mold for forming 200 times
Mould 210 positions.
Thus, by being supported trapezoidal burr 931 by a pair dovetail groove 221, it is possible to relative to roughing forming mould
Lower mold 210 locator material 920 of tool 200 such that it is able to stably in the lower mold 210 of roughing mold for forming 200
Middle supporting material 920.Additionally, the burr utilizing inclined plane S that material can be suppressed to flow out from dovetail groove 221 and constituting
The generation of 931.Therefore, it is possible to suppression decrease in yield.Incline further, since only formed on a pair dovetail groove 221
Inclined-plane S, is formed without inclined plane S in other parts, therefore, it is possible to load during suppression forging becomes big.Additionally, due to
The dovetail groove 221 connected with the 2nd pin forming part 214 defines inclined plane S, as in the present embodiment,
In the case of the arm adjacent with the 2nd pin is not provided with counterweight, it is possible to the burr that suppression produces become many.Accordingly, because energy
Enough suppression burr 931 stretch out from roughing mold for forming 200, it is thus possible to the mould being used in other operations is adjacent
Ground configuration, further, it is possible to burr 931 cause the situation of obstacle during suppression forged article transmission etc..Furthermore it is possible to suppression
The generation of burr 931, correspondingly can efficiently and easily packing material in the chamber of mould.
Further, in roller-compaction operation, as the roller-compaction lower mold 110 of mould 100, employing is following so
Lower mold 110: in the region surrounded by the 1st pin forming part 113 and a pair arm forming part 116, have the 1st grind
Compression mould tabular surface 124, the 1st pin of bent axle is shaped by described 1st pin forming part 113, the pair of arm
Forming part 116 being shaped with the 1st pin adjacent pair arm bent axle, by the 3rd pin forming part 115 and
Is had in the region that arm forming part 118 is surrounded the 3rd and rolls mould tabular surface 125, described 3rd pin forming part 115
The 3rd of bent axle pin is shaped, the pair of arm forming part 118 to bent axle with the 3rd pin adjacent pair arm
Portion is shaped.
In roughing molding procedure, as the lower mold 210 of roughing mold for forming 200, use following such
Lower mold 210: have the 1st in the region surrounded by the 1st pin forming part 213 and a pair arm forming part 216 and slightly add
Tool and mould tabular surface 224, the 1st pin of bent axle is shaped by described 1st pin forming part 213, the pair of arm
Forming part 216 being shaped with the 1st pin adjacent pair arm bent axle, by the 3rd pin forming part 215 and
Is had in the region that arm forming part 218 is surrounded the 3rd preform moulds tabular surface 225, described 3rd pin forming part
3rd pin of 215 pairs of bent axles is shaped, the pair of arm forming part 218 one adjacent with the 3rd pin to bent axle
Arm is shaped.
The deep of mould tabular surface 124 is rolled to the 1st from the die joint 111 of the lower mold 110 of roller-compaction mould 100
Degree is deep with the die joint of the lower mold 210 from roughing mold for forming 200 to the 1st preform moulds tabular surface 224
Spend identical, roll mould tabular surface 125 from the die joint 111 of the lower mold 110 of roller-compaction mould 100 to the 3rd
The die joint of the degree of depth and lower mold 210 from roughing mold for forming 200 to the 3rd preform moulds tabular surface 225
The degree of depth identical.
Thus in roller-compaction operation, it is possible to roll mould tabular surface 124 and the 3rd the 1st and roll mould tabular surface
The billet 910 as material is loaded on 125, therefore, it is possible to the most consistent with the axle center of journal shaft forming part 212
Position relationship make cylinder billet 910 be arranged in roller-compaction mould 100.Therefore, it is possible to suppression cylinder
The axle center of the billet 910 of shape becomes, relative to the axle center of journal shaft forming part 212, the one-tenth that the position relationship of inclination is caused
Product rate declines.
Additionally, in roughing molding procedure, the trapezoidal burr 931 of material 920 are by roughing mold for forming
A pair dovetail groove 221 of the lower mold 210 of 200 supports respectively, meanwhile, and the 1st preform moulds of material 920
Tabular surface bearing surface the 921, the 3rd preform moulds tabular surface bearing surface (not shown) is respectively by the 1st preform moulds
Tabular surface the 224, the 3rd preform moulds tabular surface 225 supports, and material 920 is by roughing mold for forming 200
Amount to four part supportings.Therefore, material 920 can not produce loosely relative to roughing mold for forming 200
Lower mold 210 be positioned, thus by the lower mold 210 being stably bearing in roughing mold for forming 200.
Further, in polish molding procedure, as the lower mold 310 of polish mold for forming 300, below employing
Such lower mold 310: have the in the region surrounded by the 1st pin forming part 313 and a pair arm forming part 316
1 material support 324, the 1st pin of bent axle is shaped by described 1st pin forming part 313, the pair of arm
Forming part 316 being shaped with the 1st pin adjacent pair arm bent axle, by the 3rd pin forming part and a pair arm
Having the 3rd material support (not shown) in the region that portion's forming part surrounds, described 3rd pin forming part is to bent axle
3rd pin is shaped, the pair of arm forming part being shaped with the 3rd pin adjacent pair arm bent axle.
From the degree of depth of the die joint of the lower mold 310 of polish mold for forming 300 to the 1st material support 324 with from
The die joint 211 of the lower mold 210 of roughing mold for forming 200 is to the degree of depth of the 1st preform moulds tabular surface 224
Identical, from the die joint of the lower mold 310 of polish mold for forming 300 to the 3rd material support (not shown)
The die joint 211 of the degree of depth and the lower mold 210 from roughing mold for forming 200 is to the 3rd preform moulds tabular surface
The degree of depth of 225 is identical.
Thus in polish molding procedure, the trapezoidal burr 931 of material 930 are finish-machined to type mould 300
A pair dovetail groove (not shown) of lower mold 310 support respectively, meanwhile, the 1st material supporting of material 930
Portion's bearing surface the 932, the 3rd material support bearing surface (not shown) prominent by the 1st material support 324 respectively
End face, the jag surface bearing of the 3rd material support, material 930 be finish-machined to type mould 300 amount to four
Individual part supports.Therefore, material 930 can not produce loosely relative to the lower mold of polish mold for forming 300
310 are positioned, thus by the lower mold 310 being stably bearing in polish mold for forming 300.
The invention is not restricted to above-mentioned embodiment, it is possible to reach the deformation in the range of the object of the invention, improvement etc. and all wrap
Containing in the present invention.
Such as, in the present embodiment, the roller-compaction lower mold 110 of mould 100, roughing mold for forming 200
Lower mold 210, polish mold for forming 300 lower mold 310 in, define a pair dovetail groove, but be not limited to this
Structure.As long as dovetail groove is at least formed a pair.It addition, the manufacture method of three-cylinder engine bent axle in upright arrangement is adopted
The structure of mould be not limited in present embodiment roller-compaction mould 100, roughing mold for forming 200,
The structure of polish mold for forming 300.
Claims (3)
1. a manufacture method for bent axle, carries out having roller-compaction operation, slightly add in the manufacture method of this bent axle
Work molding procedure and the forge hot of polish molding procedure, the manufacture method of described bent axle is characterised by,
In described roller-compaction operation, using cylindrical billet as raw material, use the stone roller with lower mold and upper mold
Molded mould, according to the shape of each bent axle, makes to be shaped to be similar to the finished product shape of bent axle as the billet of material
The shape of shape,
In described roughing molding procedure, use the roughing mold for forming with upper die and lower die, make described stone roller
In molded operation, the material of molding is shaped to more be similar to the shape of the finished form of bent axle,
In described polish molding procedure, use and there is the polish mold for forming of lower mold and upper mold, make described slightly
In machine-shaping operation, the material of molding is shaped to the finished form with the bent axle of allowance,
As the lower mold of described roller-compaction mould, the lower mold of described roughing mold for forming, described in be finish-machined to
The lower mold of type mould, uses following such lower mold: in vertical direction, is being shaped the journal shaft of bent axle
The arranged beneath of journal shaft forming part have the 2nd pin forming part that the to bent axle the 2nd pin is shaped, be formed and institute
Stating the groove of the 2nd pin forming part connection, described groove caves in vertical lower section, and along described roller-compaction mould, institute
Each die joint stating roughing mold for forming and described polish mold for forming extends, and described groove is at least formed
Have a pair, described groove produce the burr that the 2nd pin with bent axle is connected,
As the lower mold of described roughing mold for forming, use following such lower mold: be positioned at and sell into the described 2nd
The bottom surface of the described groove on the direction axially intersected in type portion has inclined plane, and described inclined plane suppression material is from described groove
The generation of the burr that the die joint along described roughing mold for forming flows out and constitutes,
In described roughing molding procedure, make the lower mold at described roller-compaction mould in described roller-compaction operation
Described groove in each described burr that are formed on material respectively with described in the lower mold of described roughing mold for forming
Groove engages, and makes the material of molding in described roller-compaction operation fixed relative to the lower mold of described roughing mold for forming
Position.
The manufacture method of bent axle the most according to claim 1, it is characterised in that
In described roller-compaction operation, as the lower mold of described roller-compaction mould, the following such lower mold of employing:
Become with to the arm adjacent with the 1st pin of bent axle by the 1st pin forming part that the 1st of bent axle pin is shaped
In the region that the arm forming part of type surrounds, have the 1st and roll mould tabular surface, carried out by the 3rd of bent axle pin
The district that 3rd pin forming part of molding and the arm forming part being shaped with the 3rd adjacent arm of pin to bent axle surround
In territory, have the 3rd and roll mould tabular surface,
In described roughing molding procedure, as the lower mold of described roughing mold for forming, use following such
Lower mold: by the 1st of bent axle being sold the 1st pin forming part being shaped and the arm adjacent with the 1st pin to bent axle
In the region that the arm forming part being shaped surrounds, there is the 1st preform moulds tabular surface, by bent axle
The 3rd pin forming part that 3 pins are shaped and the arm forming part being shaped with the 3rd adjacent arm of pin to bent axle
In the region surrounded, there is the 3rd preform moulds tabular surface,
From the die joint of the lower mold of described roller-compaction mould to the described 1st roll the degree of depth of mould tabular surface with from
The die joint of the lower mold of described roughing mold for forming is identical to the degree of depth of described 1st preform moulds tabular surface,
From the die joint of the lower mold of described roller-compaction mould to the described 3rd roll the degree of depth of mould tabular surface with from
The die joint of the lower mold of described roughing mold for forming is identical to the degree of depth of described 3rd preform moulds tabular surface.
The manufacture method of bent axle the most according to claim 2, it is characterised in that
In described polish molding procedure, as the lower mold of described polish mold for forming, use following such
Lower mold: by the 1st of bent axle being sold the 1st pin forming part being shaped and the arm adjacent with the 1st pin to bent axle
In the region that the arm forming part being shaped surrounds, there is the 1st material support, by the 3rd of bent axle is sold into
3rd pin forming part of row molding and the arm forming part being shaped with the 3rd adjacent arm of pin to bent axle surround
In region, there is the 3rd material support,
From the degree of depth of the die joint of the lower mold of described polish mold for forming to described 1st material support and from institute
The die joint of the lower mold stating roughing mold for forming is identical to the degree of depth of described 1st preform moulds tabular surface,
From the degree of depth of the die joint of the lower mold of described polish mold for forming to described 3rd material support and from institute
The die joint of the lower mold stating roughing mold for forming is identical to the degree of depth of described 3rd preform moulds tabular surface.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015060613A JP5992064B1 (en) | 2015-03-24 | 2015-03-24 | Crankshaft manufacturing method |
| JP2015-060613 | 2015-03-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106001380A true CN106001380A (en) | 2016-10-12 |
| CN106001380B CN106001380B (en) | 2018-12-28 |
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ID=56921007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610119575.4A Active CN106001380B (en) | 2015-03-24 | 2016-03-03 | The manufacturing method of crankshaft |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5992064B1 (en) |
| CN (1) | CN106001380B (en) |
| CA (1) | CA2923915C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109127999A (en) * | 2018-10-31 | 2019-01-04 | 中冶陕压重工设备有限公司 | A kind of forging method of recessed shelves axis |
| CN113260470A (en) * | 2019-09-20 | 2021-08-13 | 本田技研工业株式会社 | Forging method |
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| JPS59223132A (en) * | 1983-06-02 | 1984-12-14 | Honda Motor Co Ltd | Hot forging device |
| GB2145949A (en) * | 1983-07-26 | 1985-04-11 | Honda Motor Co Ltd | Method of forging a crankshaft |
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| US6199275B1 (en) * | 1998-05-19 | 2001-03-13 | Honda Giken Kogyo Kabushiki Kaisha | Method for forming crank shaft and method for producing crank shaft |
| CN201815620U (en) * | 2010-09-28 | 2011-05-04 | 西南大学 | Die for forging high-precision crank shaft |
| CN102548684A (en) * | 2010-09-17 | 2012-07-04 | 丰田自动车株式会社 | Crankshaft production method and production apparatus |
| WO2014091730A1 (en) * | 2012-12-12 | 2014-06-19 | 新日鐵住金株式会社 | Device for forming finish-forging element for forged crankshaft for 3-cylinder engine and method for producing forged crankshaft for 3-cylinder engine using same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004322137A (en) * | 2003-04-23 | 2004-11-18 | Nissan Motor Co Ltd | Method and die for forging crankshaft |
| JP6190487B2 (en) * | 2016-04-14 | 2017-08-30 | サミー株式会社 | Bullet ball machine |
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2015
- 2015-03-24 JP JP2015060613A patent/JP5992064B1/en active Active
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- 2016-03-03 CN CN201610119575.4A patent/CN106001380B/en active Active
- 2016-03-16 CA CA2923915A patent/CA2923915C/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58132342A (en) * | 1982-01-29 | 1983-08-06 | Nissan Motor Co Ltd | Forging method of coarse material of crank shaft |
| JPS59223132A (en) * | 1983-06-02 | 1984-12-14 | Honda Motor Co Ltd | Hot forging device |
| GB2145949A (en) * | 1983-07-26 | 1985-04-11 | Honda Motor Co Ltd | Method of forging a crankshaft |
| JPH06190487A (en) * | 1992-12-22 | 1994-07-12 | Mazda Motor Corp | Forging method |
| US6199275B1 (en) * | 1998-05-19 | 2001-03-13 | Honda Giken Kogyo Kabushiki Kaisha | Method for forming crank shaft and method for producing crank shaft |
| CN102548684A (en) * | 2010-09-17 | 2012-07-04 | 丰田自动车株式会社 | Crankshaft production method and production apparatus |
| CN201815620U (en) * | 2010-09-28 | 2011-05-04 | 西南大学 | Die for forging high-precision crank shaft |
| WO2014091730A1 (en) * | 2012-12-12 | 2014-06-19 | 新日鐵住金株式会社 | Device for forming finish-forging element for forged crankshaft for 3-cylinder engine and method for producing forged crankshaft for 3-cylinder engine using same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109127999A (en) * | 2018-10-31 | 2019-01-04 | 中冶陕压重工设备有限公司 | A kind of forging method of recessed shelves axis |
| CN113260470A (en) * | 2019-09-20 | 2021-08-13 | 本田技研工业株式会社 | Forging method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2016179480A (en) | 2016-10-13 |
| JP5992064B1 (en) | 2016-09-14 |
| CN106001380B (en) | 2018-12-28 |
| CA2923915A1 (en) | 2016-09-24 |
| CA2923915C (en) | 2018-05-22 |
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