CN109702130A - Model is used in forging - Google Patents
Model is used in forging Download PDFInfo
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- CN109702130A CN109702130A CN201811255986.1A CN201811255986A CN109702130A CN 109702130 A CN109702130 A CN 109702130A CN 201811255986 A CN201811255986 A CN 201811255986A CN 109702130 A CN109702130 A CN 109702130A
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- Pulleys (AREA)
- Gears, Cams (AREA)
Abstract
A kind of forging model, make by forging integrally manufactured axle portion, it is coniform with the tooth crest in wheel portion, the molding process of pulley shaft of the stepless transmission for the parking gear for being disposed in the coniform back side with wheel portion, making material be full of parking gear.The Free up Memory (120) that setting is extended outward towards the diameter with wheel portion and flows out overlap in the model (100) being made of upper and lower mould (104,106), Free up Memory (120) has the diameter second space outward in diameter the first space outward for the tooth crest for being formed in parking gear, the bottom of the tooth portion for being formed in parking gear, and the circulating resistance for setting the overlap in the first space is bigger than the circulating resistance of the overlap of second space.
Description
Technical field
The present invention relates to the manufactures of the pulley shaft of the fixed pulley for constituting variable v-belt drive (hereinafter referred to as CVT)
Forging model, more particularly to be suitable for pulley the back side (face of the opposite side in pulley face) and belt wheel ratio is integrally formed
The forging model of the manufacture of the pulley shaft of the parking gear of the slightly smaller diameter of the outer diameter of belt wheel.
Background technique
Need to equip halting mechanism in the CVT for being equipped on vehicle, but it has been known that there is the park tooths that will constitute the halting mechanism
Wheel is integrally attached to the back side (patent document 1) in the pulley face of fixed pulley (pulley shaft).
Patent document 1:(Japan) Japanese Laid-Open Patent Publication 11-254084 bulletin
It the use of the content of silicon (Si) is generally that 0.2 mass % is left in the case where manufacturing above-mentioned pulley shaft by forging
Right steel, but in this case, in order to improve the durability in pulley face, need to implement micro- bead in rear process.However,
When the shot-peening for micro- bead is not completely removed and still remains on a small quantity, which becomes field trash (pollutant),
A problem that as oil vibration can be generated in the CVT of product.
Therefore, in recent years, have studied to improve the durability in pulley shaft (special especially pulley face), and in order to abolish
Micro- bead process, the high Si steel for being 0.8~1.0 mass % as materials'use silicone content.
When carrying out common warm and hot forging (1250 DEG C of front and backs of heating temperature) using above-mentioned high Si steel, oxidation with high hardness is generated
The abrasion of skin, model is in progress in a short time, therefore, is distinguished by the research of applicant etc., in order to inhibit oxidation with high hardness
The generation of skin and the service life for ensuring model, need heating temperature than usually low sub- warm and hot forging (1120 DEG C of heating temperature~
1160 DEG C) under manufacture.
However, the hardness of workpiece caused by heating reduces insufficient, the mobility of the material in model in sub- warm and hot forging
It reduces, therefore, material can not can not be full of above-mentioned park tooth wheel portion (in order to form parking throughout entire model, especially material
Gear and the groove portion of model being arranged), it is likely to become substandard products.
Summary of the invention
The present invention is set up in view of the above subject, and its purpose is to provide the production that the forging in pulley shaft carries out
In, even if carrying out sub- warm and hot forging using high Si steel, also material can be made to be filled in entire model, especially park tooth wheel portion
Model is used in forging.
(1) to achieve the goals above, the present invention provides a kind of forging model, for manufacturing axle portion, Xiang Suoshu axis
The diameter in portion outward it is extended it is coniform with wheel portion, near the peripheral part with wheel portion from the circle with wheel portion
The bottom surface of cone along the cricoid parking gear one forging molding of the axially projecting setting of the axle portion Belt-type Adjustable-speed
The pulley shaft of device, wherein being had by the die cavity that upper die and lower die are formed makes the molding figuration portion of the pulley shaft, from the figuration
The peripheral part with wheel portion outer peripheral edge that corresponds in portion is extended outward towards the diameter with wheel portion and makes overlap stream
Free up Memory out, the Free up Memory have the first sky of the diameter for the tooth crest for being formed in the parking gear outward
Between, be formed in the parking gear bottom of the tooth portion diameter second space outward, by the overlap in first space
Circulating resistance is set as bigger than the circulating resistance of the overlap of the second space.
(2) preferably, stream of the circulation area of the overlap in setting first space than the overlap of the second space
Logical area is small.
(3) preferably, the die face of the upper mold in setting first space ratio at a distance from the die face of the lower die
The die face of the upper mold of the second space is small at a distance from the die face of the lower die.
(4) it is further preferred, that the high silicon steel for being 0.8~1.0 mass % as materials'use silicon (Si) content, is used for
The heating temperature of the material is the sub- warm and hot forging for the centre that warm and hot forging and warm forging are made.
According to the present invention, corresponding to peripheral part with wheel portion outer peripheral edge towards the diameter with wheel portion outward from figuration portion
The Free up Memory for being extended and flowing out overlap, makes the first space of the diameter for the tooth crest for being formed in parking gear outward
The circulating resistance of the second space of the diameter in bottom of the tooth portion of the circulating resistance than being formed in parking gear outward is big, therefore, Neng Goujin
One step inhibits to be formed outflow of the material to Free up Memory near the groove portion of the model of the tooth crest of parking gear, it is ensured that material flow
Enter the groove portion, the defect of the tooth crest of the parking gear of the element important as product can be prevented, substandard products can be reduced
It generates.
In addition, according to the present invention, due to the first space of setting overlap circulation area than second space overlap stream
Logical area is small and forms the difference of circulating resistance, therefore the shape of model can be made to become simply, in turn, due to setting the first space
The die face of upper mold is smaller at a distance from the die face of lower die than the die face of the upper mold of second space at a distance from the die face of lower die and shape
At the difference of circulating resistance, therefore the shape of model can be made to become simpler.
In addition, can be stayed realizing that raw material are full of due to being manufactured using high Si steel as material and by sub- warm and hot forging
Skiving wheel portion (especially tooth crest) improves the durability of product, micro- bead of process after can also omitting afterwards.
Detailed description of the invention
Fig. 1 is the explanatory diagram for indicating the process of the forging processing to workpiece, and (a) indicates first step, (b) indicate the second work
Sequence (c) indicates the third step, (d) indicates the fourth step;
Fig. 2 is that cross-sectional view is omitted in the part for the summary of forging model for indicating an embodiment of the present invention;
Fig. 3 is observed from the parking gear side of the pulley shaft of the molder of the forging by an embodiment of the present invention
Top view;
Fig. 4 is the regarding sectional view along the line A-A of Fig. 3;
Fig. 5 is the regarding sectional view along the line B-B of Fig. 3.
Description of symbols
10: pulley shaft
11d: axle portion
12d: band wheel portion
13d: parking gear
14d: flash (overlap)
100: model
104: upper mold
104a: die face
106: lower die
106a: die face
110: figuration portion
120: Free up Memory
120a: the first space
120b: second space
The die face distance of Da: the first space 120a
Db: second space 120b die face distance
Specific embodiment
Hereinafter, being described with reference to embodiments of the present invention.
In addition, embodiment as shown below only example, and do not express in non-excluded the following embodiments and the accompanying drawings
Various modifications and technical application.
Illustrate the process that processing and manufacturing pulley shaft is carried out to workpiece referring to Fig.1.
Firstly, as the preceding process for implementing forging processing, it will be using high Si steel as the columned workpiece (not shown) of material
It is heated to 1120 DEG C~1160 DEG C (sub- warm and hot forgings).
Later, the forging for implementing first step to the cylindric workpiece of heating is processed, and formation has short shown in Fig. 1 (a)
The first workpiece 10a of axis 11a.
Then, the first workpiece 10a forging for implementing the second step is processed, formation has long axis 11b shown in Fig. 1 (b)
Second workpiece 10b.
Next, processing to the second workpiece 10b forging for implementing the third step, formation has long axis shown in Fig. 1 (c)
The third workpiece 10c of 11c and approximately spherical belt wheel preparing portion 12c.
In turn, third workpiece 10c is placed on to forging model (the hereinafter referred to as mould of present embodiment shown in Fig. 2
Type) 100, implement the forging processing of the fourth step, formation has axle portion 11d shown in Fig. 1 (d) and with wheel portion 12d and park tooth
Take turns the 4th workpiece 10d of 13d.
Remaining is formed because material (overlap) flows out to Free up Memory (aftermentioned) of model 100 on the 4th 10d
Flash 14d.By cutting flash 14d in rear process, the pulley shaft 10 for the final article shape that is maintained.
Fig. 2 is that cross-sectional view is omitted in the part for implementing the model 100 of above-mentioned the fourth step.
As at present it is well known that original forging is made of with model multiple parts, in addition, general rule is equipped for driving
The driving device of model or for the knockout pin etc. from model discharge workpiece, but for the die cavity of clear model 100 in Fig. 2
102 shape, usually omission well-known structure.
Had by the die cavity 102 that the upper mold 104 and lower die 106 of model 100 are formed and forms the main part of pulley shaft 10 and (remove
The part of overlap) figuration portion 110, be extended from the peripheral part in the figuration portion 110 and make what the overlap of material flowed out to release
120 between emptying.
It is figuration portion 110 between two chain-dotted lines C, D (position for being equivalent to the outer peripheral edge with wheel portion 12d) of Fig. 2, outside
Side is Free up Memory 120.
In figuration portion 110, it is formed with according to the shape of pulley shaft 10 and forms the axis forming portion 111 of above-mentioned axle portion 11d, be formed
The above-mentioned belt wheel forming portion 112 with wheel portion 12d, the gear groove portion 113 for forming above-mentioned parking gear 13d.
Free up Memory 120 is from the outer peripheral edge (position of chain-dotted line C, D) of belt wheel forming portion 112 to band (the figuration portion of wheel portion 112
110) it is connected to and is extended in.
Fig. 3 is the top view that pulley shaft 10 is seen from the side parking gear 13d, indicates above-mentioned release with double dot dash line
The a part in space 120.
From the figure 3, it may be seen that parking gear 13d by being constituted than the ring bodies with the slightly smaller diameter of wheel portion 12d, be formed with side 131d with
Multiple bottom of the tooth portion 133d between multiple tooth crest 132d, each tooth crest 132d of parking bar engaging not shown.
Above-mentioned Free up Memory 120 has in the extension for being formed in above-mentioned tooth crest 132d (diameter of tooth crest 132d is outward)
The first space 120a, be formed in the extension of above-mentioned bottom of the tooth portion 133d the second space of (diameter of tooth crest 133d is outward)
120b。
Moreover, as shown in Figure 4, Figure 5, the die face 104a of the upper mold 104 of the first space 120a and the die face 106a of lower die 106
Interval (distance) Da be set as between the die face 104a of the upper mold 104 than second space 120b and the die face 106a of lower die 106
It is small every (distance) Db, the circulating resistance of overlap of the circulating resistance than second space 120b of the overlap of the first space 120a as a result,
Greatly.In addition, double dot dash line shown in fig. 5 indicates the cross section profile of tooth crest 132d shown in Fig. 4.
This forging is constituted as described above with model, due to making to be formed in the first space of the diameter of tooth crest 132d outward
The circulating resistance of the overlap of 120a greatly than other (second space 120b), therefore even if using high Si steel as material, in Asia
Pulley shaft is manufactured under the situation that the mobility of material reduces when warm and hot forging, material can also be full of and is used to form tooth crest 132d
Gear groove portion 113, be able to suppress the generation of substandard products.
In addition, due to the circulating resistance for the overlap for reducing second space 120b, so it is able to suppress the molding of model 100
The rising of load, it can be ensured that the service life of model 100.
It this concludes the description of embodiments of the present invention, but the present invention can be by the appropriate deformation implementation of embodiment.
For example, in the above-described embodiment, the die face of the model 100 by changing first and second space 120a, 120b
Distance between 104a, 106a, the circulating resistance for being formed in overlap is equipped with the structure of difference, by making between die face 104a, 106a
Apart from identical, from prominent setting protrusion of die face 104a, 106a of the first space 120a etc., the circulation area for reducing overlap (increases
Circulating resistance), also it can be obtained and the same effect of above embodiment.
In addition, in the present embodiment, materials'use silicon (Si) content as forging molding is 0.8~4.0 mass %
High Si steel, but the material of forging molding is without being limited thereto, applicable various metal materials.
In addition, this forging with model such as in embodiments illustratively, the heating temperature suitable for material is warm and hot forging and temperature
The sub- warm and hot forging of the centre of forging, but it is not limited to sub- warm and hot forging, it can also be applied to other forging technology.
Claims (4)
1. a kind of forging model, for manufacturing the coniform band for being extended the diameter of axle portion, Xiang Suoshu axle portion outward
Wheel portion is set along the axially projecting of the axle portion near the peripheral part with wheel portion from the bottom surface of the circular cone with wheel portion
The pulley shaft of the variable v-belt drive for the cricoid parking gear one forging molding set, which is characterized in that
Being had by the die cavity that upper die and lower die are formed makes the molding figuration portion of the pulley shaft, corresponds to institute from the figuration portion
The Free up Memory that the peripheral part with wheel portion outer peripheral edge is extended outward towards the diameter with wheel portion and flows out overlap is stated,
The Free up Memory has the diameter the first space outward for the tooth crest for being formed in the parking gear, is formed in
The second space of the diameter in the bottom of the tooth portion of the parking gear outward,
The circulating resistance of the overlap in first space is set as bigger than the circulating resistance of the overlap of the second space.
2. forging model as described in claim 1, which is characterized in that
The circulation area for setting the overlap in first space is smaller than the circulation area of the overlap of the second space.
3. forging model as claimed in claim 2, which is characterized in that
The die face of the upper mold in first space is set at a distance from the die face of the lower die than the institute of the second space
The die face for stating upper mold is small at a distance from the die face of the lower die.
4. forging model according to any one of claims 1 to 3, which is characterized in that
The high silicon steel for being 0.8~1.0 mass % as materials'use silicon (Si) content, the heating temperature for the material are heat
The sub- warm and hot forging for the centre that forging and warm forging are made.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2017207203A JP6953275B2 (en) | 2017-10-26 | 2017-10-26 | Forging die |
JP2017-207203 | 2017-10-26 |
Publications (2)
Publication Number | Publication Date |
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CN109702130A true CN109702130A (en) | 2019-05-03 |
CN109702130B CN109702130B (en) | 2021-06-15 |
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Family Applications (1)
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CN201811255986.1A Active CN109702130B (en) | 2017-10-26 | 2018-10-26 | Forging mold |
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JP (1) | JP6953275B2 (en) |
CN (1) | CN109702130B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111618541A (en) * | 2020-05-20 | 2020-09-04 | 江苏威鹰机械有限公司 | Precision forging plastic forming process of belt wheel shaft for stepless speed changer |
CN113260470A (en) * | 2019-09-20 | 2021-08-13 | 本田技研工业株式会社 | Forging method |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN113260470A (en) * | 2019-09-20 | 2021-08-13 | 本田技研工业株式会社 | Forging method |
CN111618541A (en) * | 2020-05-20 | 2020-09-04 | 江苏威鹰机械有限公司 | Precision forging plastic forming process of belt wheel shaft for stepless speed changer |
Also Published As
Publication number | Publication date |
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CN109702130B (en) | 2021-06-15 |
JP2019076943A (en) | 2019-05-23 |
JP6953275B2 (en) | 2021-10-27 |
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