JPS56131045A - Integral casting method of crank shaft - Google Patents
Integral casting method of crank shaftInfo
- Publication number
- JPS56131045A JPS56131045A JP3519880A JP3519880A JPS56131045A JP S56131045 A JPS56131045 A JP S56131045A JP 3519880 A JP3519880 A JP 3519880A JP 3519880 A JP3519880 A JP 3519880A JP S56131045 A JPS56131045 A JP S56131045A
- Authority
- JP
- Japan
- Prior art keywords
- crank
- recess
- arm
- hollowed
- pin
- 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.)
- Pending
Links
Landscapes
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
PURPOSE: To constitute a hollowed recess extremely easily by setting a die corresponding to the shape of the hollowed recess into a sand mold after applying antiburn-on treatment on the casting surface thereof in forming the hollowed recess to a crank arm surface close to the revolving center of a shaft.
CONSTITUTION: In constituting an engine crank shaft, two pieces a pair of crank arms 3 are provided successively in continuation to a journal 1 concentrical to the axial center of the crank, and these are connected by means of a crank pin 2 to provide arm corner parts (a) and balance weights 4, thence the crankshaft is cast. At this time, a hollowed recess 5 which relieves the concentration of tensile stress is formed to the arm 3 surface in proximity to the pin of the part near the rotating center of the crank shaft at the connected part of the crank pin 2 and the crank arm 3. In forming said part 5, a die 6 bulged and formed with a raised part 6a of a partially cylidrical shape corresponding to said recess is made and in order to prevent melt-sticking to molten metal, a mold coating material is coated thereon, thence it is set in the prepared position of the sand mold and casted.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3519880A JPS56131045A (en) | 1980-03-18 | 1980-03-18 | Integral casting method of crank shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3519880A JPS56131045A (en) | 1980-03-18 | 1980-03-18 | Integral casting method of crank shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56131045A true JPS56131045A (en) | 1981-10-14 |
Family
ID=12435161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3519880A Pending JPS56131045A (en) | 1980-03-18 | 1980-03-18 | Integral casting method of crank shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56131045A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106270382A (en) * | 2016-08-12 | 2017-01-04 | 宁波全力机械模具有限公司 | A kind of electric machine casing water jacket core mould |
-
1980
- 1980-03-18 JP JP3519880A patent/JPS56131045A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106270382A (en) * | 2016-08-12 | 2017-01-04 | 宁波全力机械模具有限公司 | A kind of electric machine casing water jacket core mould |
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