CN1139745A - Method of molding poppet valve having smaller diameter portion - Google Patents
Method of molding poppet valve having smaller diameter portion Download PDFInfo
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- CN1139745A CN1139745A CN 95107712 CN95107712A CN1139745A CN 1139745 A CN1139745 A CN 1139745A CN 95107712 CN95107712 CN 95107712 CN 95107712 A CN95107712 A CN 95107712A CN 1139745 A CN1139745 A CN 1139745A
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- die
- valve
- die cavity
- diameter
- poppet valve
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Abstract
Heated material is filled into a cavity which has three portion having different diameter. By compressing the material in the cavity by a punch, there is formed a poppet valve which comprises a valve head, a valve stem and a smaller diameter portion which is provided at the end of the valve stem.
Description
The present invention relates to a kind of hot forging method of poppet valve, particularly also have the more die forging method of the poppet valve of fraction of a diameter in the valve rod end.This poppet valve uses in the internal-combustion engine of automobile.
Poppet valve is made with the hot-forging die method shown in Fig. 2 (A) to (C) usually.Fig. 2 (A) represents cylindrical steel 101 (blank), and it is full of counterdie 102 in first work step shown in Fig. 2 (B) after being heated to uniform temperature.The counterdie 102 that uses in first work step has a die cavity, and the shape of the valve rod 105 that valve head 104 that the shape of this die cavity and diameter are bigger and diameter are less adapts.Blank 101 through heat temperature raising is exerted pressure by a drift 106 (patrix), forging stock 103 in the middle of being forged into, and then, middle forging stock is inserted in the counterdie 107 of second work step shown in Fig. 2 (C).The counterdie 107 that uses in second work step have one with the valve head 109 of the poppet valve 108 of final die-forging forming and the die cavity that valve rod 105 adapts.The valve head 104 of middle forging stock 103 is made valve head 109 at the punching press counterdie of drift 110, is swaged into whole poppet valve 108.
As shown in Figure 3, on poppet valve 111, also have the diameter part 114 littler than valve rod.For poppet valve is contained in the motor, this section diameter more also is shaped on a cotter way 115 on the fraction 114, a pair of pin (not shown) and the engagement of this cotter way.
Be the diameter of valve rod 113 ends of making poppet valve 111 as shown in Figure 3 fraction 114 more, valve head 112 and valve rod 113 are made shaping in the work step shown in Fig. 2 (C), and then through machining, the for example processing of centerless grinding machine, this method can cause the mechanical processing process needed time to increase, work efficiency reduces, thereby manufacture cost is increased.Also the emery wheel lost of life may appear, the problem that needs often maintenance to renew.
For overcoming above-mentioned shortcoming, it is a kind of in the die forging poppet valve that one object of the present invention promptly is to provide, and makes the more method of fraction of diameter in the lower mould of valve rod.
The invention provides a kind of more die forging method of the poppet valve of fraction of diameter that has in the valve rod end, this method comprises following work step: the blank after will heating is inserted has the die cavity that forms valve head, form the die cavity of valve rod and form the more die cavity of fraction of diameter, and the counterdie that is interconnected of each die cavity; With the upper end portion of the blank of drift punching press in die cavity, make poppet valve through forge hot.
According to the method for manufacturing poppet valve of the present invention, diameter more fraction does not form with machining, but with hot forging forming, thereby has reduced the machining work step after forging and pressing, and has improved work efficiency and has prolonged working life of cutter.The part that need grind away in grinding has reduced, and has not only saved raw material, has also reduced manufacture cost.More fraction is through forging and hardness increases for diameter, and intensity has also improved, and tensile breaking strength is especially compared with the machining goods and to be significantly improved.
Describe the present invention with reference to the accompanying drawings, feature of the present invention and advantage will show more clear obviously.In the accompanying drawing:
Fig. 1 is for implementing the sectional view of forge hot processing device of the present invention;
Fig. 2 (A) is blank for the schematic representation of the manufacturing work step commonly used of description poppet valve, (B) is first work step, (C) is second work step;
Fig. 3 is for there being the more stereogram of the poppet valve of fraction of diameter in the valve rod end.
Method of the present invention comprises two forge hot work steps, forging stock in the middle of first formula step becomes the raw material manufacturing, and second work step becomes poppet valve with middle forging stock die forging.Fig. 1 is the device that first operation is used.The counterdie that is used for first work step comprises that the upper cavity die that a upper cavity die 1 and is positioned under the upper cavity die 1 inserts 2.Upper cavity die 1 have one with the bigger valve head 7 corresponding die cavities 3 of diameter of middle forging stock.With a die cavity 4 in order to make valve rod 8.Inserting of upper cavity die 2 has the diameter die cavity 5 littler than die cavity 4.
The formation diameter more die cavity 5 of fraction is communicated with through an arc curved edge 10 with the die cavity 4 of upper cavity die 1, and like this, diameter more fraction 9 has just coupled together sleekly with valve rod 3.
Heated blank (not shown) is inserted in the die cavity 3 through the upper shed of upper cavity die 1, under the impact of drift 6, forged and pressed, material flows downward because of plastic deformation, thereby valve head 7 and valve rod 8 have been formed, compressive deformation is proceeded, the material of valve rod 8 underparts continues to flow into upper cavity die and inserts in 2 the die cavity, forms more fraction 9 of diameter.Diameter more fraction and valve rod 8 couples together through a concave surface that is formed by the arc-shaped transition edge 10 on die cavity 5 and top, thereby has formed the middle forging stock of the part 9 that comprises that valve head 7, valve rod 8 and diameter are littler than valve rod 8.
Then, the poppet valve that obtains of expectation is made in second work step, diameter more the cotter slot that gives on the fixed position on the fraction then make through machining, like this, finally manufactured finished product poppet valve shown in Figure 3.
In the present embodiment, diameter more fraction 9 just makes in first work step, but it also can make in second work step.Upper cavity die is inserted and 2 also can be made one with upper cavity die 1.
The above only relates to one embodiment of the present of invention.The scope that does not exceed following claim, those skilled in the art may make various modifications and variations.But all be to break away from the included scope of the application's claims.
Claims (2)
1. die forging method that has the poppet valve of the diameter part littler than the diameter of valve rod, this method comprises following work step:
The material of heating is inserted in the counterdie, and this counterdie comprises that one forms the die cavity of valve head, and a die cavity and that forms valve rod forms the more die cavity of fraction of diameter, is interconnected between each die cavity; And,
With the last top pressurization of drift material in die cavity, carry out hot forging, manufacture poppet valve.
2. the method for claim 1 is characterized in that, the die cavity that is used to form valve head and valve rod is arranged in the upper strata die of counterdie, and the die cavity that is used to form smaller-diameter portion is set in place in the upper strata die plate insert of upper strata die below.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95107712 CN1139745A (en) | 1995-07-04 | 1995-07-04 | Method of molding poppet valve having smaller diameter portion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95107712 CN1139745A (en) | 1995-07-04 | 1995-07-04 | Method of molding poppet valve having smaller diameter portion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1139745A true CN1139745A (en) | 1997-01-08 |
Family
ID=5076425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95107712 Pending CN1139745A (en) | 1995-07-04 | 1995-07-04 | Method of molding poppet valve having smaller diameter portion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1139745A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102921863A (en) * | 2012-10-23 | 2013-02-13 | 如皋透平叶片制造有限公司 | Forging die for valve rod blank |
| CN108817290A (en) * | 2018-06-25 | 2018-11-16 | 太仓久信精密模具股份有限公司 | A kind of nozzle needle valve body cold extrusion technology |
| CN112719201A (en) * | 2020-12-02 | 2021-04-30 | 浙江欧伦泰防火设备有限公司 | Valve forging and pressing process |
-
1995
- 1995-07-04 CN CN 95107712 patent/CN1139745A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102921863A (en) * | 2012-10-23 | 2013-02-13 | 如皋透平叶片制造有限公司 | Forging die for valve rod blank |
| CN108817290A (en) * | 2018-06-25 | 2018-11-16 | 太仓久信精密模具股份有限公司 | A kind of nozzle needle valve body cold extrusion technology |
| CN108817290B (en) * | 2018-06-25 | 2024-05-03 | 太仓久信精密模具股份有限公司 | Cold extrusion forming process for needle valve body of oil nozzle |
| CN112719201A (en) * | 2020-12-02 | 2021-04-30 | 浙江欧伦泰防火设备有限公司 | Valve forging and pressing process |
| CN112719201B (en) * | 2020-12-02 | 2022-09-23 | 浙江欧伦泰防火设备有限公司 | Valve forging and pressing process |
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| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |