JPS60181238U - Forging method for segment sprockets - Google Patents
Forging method for segment sprocketsInfo
- Publication number
- JPS60181238U JPS60181238U JP20394383U JP20394383U JPS60181238U JP S60181238 U JPS60181238 U JP S60181238U JP 20394383 U JP20394383 U JP 20394383U JP 20394383 U JP20394383 U JP 20394383U JP S60181238 U JPS60181238 U JP S60181238U
- Authority
- JP
- Japan
- Prior art keywords
- forging
- die
- segment
- sprocket
- forged
- 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
- Forging (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第1図はセグメント・スプロケットの従来の横材式鍛造
工法による5枚歯の該鍛造品の平面図、第2図は該鍛造
品13−B’断面図、第3図は従来の縦材式による該鍛
造品の平面図、第4図は該鍛造品のC−C’断面図、第
5図は本案による工法で製作されたセグメント・スプロ
ケット鍜造品の平面図、第6図は該鍛造品の[)−D’
断面図、第7図は本案で使用する縦打金型平面図で5枚
の歯型36と余肉湯面37を示す。第8図はトリミング
矯正金型の断面図であると同時に図中A −A’線を界
して左右にてトリミング矯正工程の前後の効果を示す。Fig. 1 is a plan view of a segment sprocket with 5 teeth made by the conventional cross member type forging method, Fig. 2 is a sectional view taken along the line 13-B' of the forged product, and Fig. 3 is a conventional longitudinal member type forged product. Fig. 4 is a plan view of the forged product, Fig. 4 is a cross-sectional view of the forged product, Fig. 5 is a plan view of the segment sprocket forged product manufactured by the method according to the present invention, and Fig. 6 is a plan view of the forged product. Product [)-D'
The sectional view and FIG. 7 are plan views of the vertical stamping mold used in the present invention, showing five tooth molds 36 and an excess metal surface 37. FIG. 8 is a cross-sectional view of the trimming straightening mold, and at the same time shows the effects before and after the trimming straightening process on the left and right sides of the line A-A' in the figure.
Claims (1)
ロケットを製作するための鍛造工法である。 従来のセグメント・スプロケットの鍛造工法は、横材式
及び縦材式鍛造工法による。第1図は横材式による5枚
歯の該鍛造品の平面図、第2図はそのB−B’断面図、
第3図は縦材式による該鍜−造品の平面図、第4図はそ
のC−C’断面図である。従来のセグメント・スプロケ
ット鍜造品は第1図より第4図までの外観及び断面図で
も判出来るよう該鍛造品を機械部品として使用するまで
には多種工程の機械仕上加工を必要とする欠点がある。 本案は該鍛造品を機械部品とするまで必要な多工程の機
械加工を出来るだけ除去し、製品価格の軽廉を目的とし
て考案された鍛造工法である。 本案によるセグメント・スプロケット型打鍛造工法では
型打鍛造工程、トリミング矯正工程、コイニング工程が
順次行は孔、何れの工程も熱間処理される。該3種類の
工法は大別して第1工法を型打鍛造工程とトリミング矯
正工程を組合せた作業工程とし第2工法として該工程で
鍛造された鍛造品を精密仕上する熱間コイニング工程と
する。本実用新案登録請求の範囲にあるセグメント・ス
プロケットの鍛造工法は前記の第1工法に該当する。第
5図は本考案によるセグメント・スプロケット型打鍛造
品の平面図、第6図はそのD−D′断面図である。該鍛
造工程に使用する金型の彫込み方向は第6図に示す如(
余肉面9に対し、歯面2を平行になるようにする。但し
両端面の歯型26.27及び両端面4,5逆抜勾配にな
るため、抜勾配がつく範囲に該スプロケットの正規寸法
の円弧3を広げる。即ち本案の鍛造工法は鍛造金属素材
を、広げた該円弧の金型で型打鍛造し、該鍛造品をば熱
間トリミング矯正工程にて正規寸“法の金型で正規寸法
の鍛造品に矯正することを特徴とする工法。[Scope of Claim for Utility Model Registration] This proposal is a forging method for producing segment sprockets by die forging a forged metal material. Conventional forging methods for segment sprockets include horizontal and vertical forging methods. Fig. 1 is a plan view of the five-tooth forged product using the cross member type, Fig. 2 is a sectional view taken along line B-B',
FIG. 3 is a plan view of the vertical member type bolt structure, and FIG. 4 is a cross-sectional view taken along the line CC'. As can be seen from the external appearance and cross-sectional views shown in Figures 1 to 4, conventional forged segment and sprocket products have the disadvantage that they require multiple machining processes before they can be used as machine parts. be. This is a forging method devised for the purpose of reducing the cost of the product by eliminating as much as possible the multi-step machining process required to turn the forged product into a machine part. In the segment sprocket die forging method according to the present invention, the die forging process, the trimming straightening process, and the coining process are sequentially performed to form holes, and each process is hot-treated. The three methods can be roughly divided into the first method, which is a work process that combines a die forging process and a trimming straightening process, and the second method, which is a hot coining process that precisely finishes the forged product produced in this process. The segment sprocket forging method within the scope of this utility model registration claim falls under the above-mentioned first method. FIG. 5 is a plan view of the segment sprocket die forging according to the present invention, and FIG. 6 is a sectional view taken along line DD'. The engraving direction of the die used in the forging process is as shown in Fig. 6 (
The tooth surface 2 is made parallel to the surplus surface 9. However, since the tooth patterns 26 and 27 on both end faces and the opposite draft angle on both end faces 4 and 5, the arc 3 of the regular size of the sprocket is expanded to the range where the draft angle is formed. In other words, the proposed forging method involves punching and forging a forged metal material in an expanded circular arc die, and then converting the forged product into a forged product with regular dimensions using a regular-size die in a hot trimming and straightening process. A construction method characterized by straightening.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20394383U JPS60181238U (en) | 1983-12-28 | 1983-12-28 | Forging method for segment sprockets |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20394383U JPS60181238U (en) | 1983-12-28 | 1983-12-28 | Forging method for segment sprockets |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS60181238U true JPS60181238U (en) | 1985-12-02 |
Family
ID=30766347
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20394383U Pending JPS60181238U (en) | 1983-12-28 | 1983-12-28 | Forging method for segment sprockets |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60181238U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010095542A1 (en) * | 2009-02-19 | 2010-08-26 | 株式会社小松製作所 | Method of manufacturing sprocket segment, and sprocket segment |
-
1983
- 1983-12-28 JP JP20394383U patent/JPS60181238U/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010095542A1 (en) * | 2009-02-19 | 2010-08-26 | 株式会社小松製作所 | Method of manufacturing sprocket segment, and sprocket segment |
CN102281965A (en) * | 2009-02-19 | 2011-12-14 | 株式会社小松制作所 | Method of manufacturing sprocket segment, and sprocket segment |
US8904844B2 (en) | 2009-02-19 | 2014-12-09 | Komatsu Ltd. | Method of manufacturing sprocket segment, and sprocket segment |
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