JPS5933043A

JPS5933043A - Manufacture of hollow cam shaft

Info

Publication number: JPS5933043A
Application number: JP57142400A
Authority: JP
Inventors: Hisashi Oki; 久大木
Original assignee: Individual
Current assignee: Individual
Priority date: 1982-08-17
Filing date: 1982-08-17
Publication date: 1984-02-22

Abstract

PURPOSE:To enable easy manufacture of a cam shaft that has a large ratio of diameter of the shaft to the larger diameter of the cam part by combining bulging and drawing. CONSTITUTION:A metallic tube 1 having diameter equal to shorter diameter of the cam part of desired cam shaft is bulged, and projection 2 of the cam part is formed. Then, the shaft 3 and bearing parts 4, 4 are formed by drawing by roller rolling or press working to obtain a cam shaft 5. In this way, only the projection 2 is bulged by bulging, and accordingly, working is easy and thickness deviation is small. At the same time, the side of the cam part is not slanted. Consequently, a cam shaft having a large ratio of diameter of the shaft 3 to longer diameter of cam part can be manufactured easily.

Description

【発明の詳細な説明】通宮カムシャフトは、金属棒材を切削加工して製造する
が、この方法は、製作が甚だ面倒であるとともに、素材
に多動°の無、駄が出るので、高・側となる。[Detailed Description of the Invention] The Togu camshaft is manufactured by cutting a metal bar material, but this method is extremely troublesome to manufacture, and the material is wasted due to hyperactivity. Becomes high/side.

１だ、比較的軽１１荷の個所に・１す・用するカムシャ
　　　　　　　１７トに、バルジ加工ににす、ｌｉ単か
つ安価に製造しつるが、このや法は、軸部の径とカム部
のＪテ２径との比が犬さくなるに従い、カム部の側内の
煩多１角度が大きくなり、かつ偏肉が著しくなるととも
に、加工そのものが困難となる。1. The camshaft is used in places with relatively light loads. 17. It is easy to manufacture li for bulge machining, and it is easy to manufacture at low cost. As the ratio of the diameter of the cam part to the 2nd diameter of the cam part becomes smaller, the angle of the inner side of the cam part becomes larger, the uneven thickness becomes more noticeable, and the machining itself becomes difficult.

とにより、−１−述の従来方法の久〜解消１７だ、カム
シャフトの製榊刀法に関するもの人以トーイ（Ｊｊ（＋
１の図面に基１いて一体的に説明子る。Therefore, the conventional method described in -1-17 has been resolved.
An integral explanation will be given based on the drawing in Figure 1.

第」図〜、第６−は、本発明の第］実施例を示すもので
、’ｉｔ’４１１ｉ図り２図に示＋（ｉ、）　畝所望の
カム１　ジャラドの□カム與３の短畔と等径をな、す金
属Ｉ・で、　ある。Figures 1 to 6 show the embodiment of the present invention, and are shown in Figure 2. There is a metal I, which has the same diameter as .

この素管□；１）を、・第３図と第４図に示すように、
バルジ加工によりカム部の突出部（２）を成形する。This raw tube □;1), as shown in Figures 3 and 4,
The protruding part (2) of the cam part is formed by bulge processing.

しかるイな、第５図と第６図Ｖこ示すように、ローラ転
造また（げブレス加工により絞り力［ｌ工して、軸部（
３）と軸受部（４）（４）を成形すると、カッ・シャフ
ト（５）が弁りら１−＋る。However, as shown in Figures 5 and 6, the shaft part (
3) and the bearing part (4) (4), the cup shaft (5) will be removed from the valve.

上述の本発明方法Ｖこよれｒコ、バルジ加工により膨出
させるＲ１ｆ分は、突出部（２）のみであるｋめ力１］
−［は容易で、偏肉が僅かであるとともに、カム部Ｉ；
の１１１１１而（６）が傾斜ぜす、従って、軸部（３）
の径とカム部の長径の比の大きいものも、容易に製造す
ることができる。In the above-mentioned method of the present invention, the R1f portion bulged by the bulge processing is only the protrusion (2), which is the tightening force 1]
- [ is easy, the thickness deviation is slight, and the cam part I;
11111 (6) is inclined, therefore, the shaft part (3)
It is also possible to easily manufacture one with a large ratio of the diameter of the cam part to the major axis of the cam part.

第７図〜第１０図は、本発明の第２来施＋＋ｌｌを示す
もので、前実施例と同一の個所には、同一符号な付して
説明を省略する。7 to 10 show a second embodiment of the present invention, and the same parts as in the previous embodiment are given the same reference numerals and their explanation will be omitted.

不実施ｉ夕１．ｉにおいては、第７図と第８図に示すよ
うに、累層（１，）　’ｒ　、才ず絞り加工により、細
部（３）と軸受ｊｌｆ　（’・）（４・）ケ成形する。Not implemented 1. In step i, as shown in FIGS. 7 and 8, the detail (3) and the bearing jlf ('·) (4·) are formed by layer (1,) 'r and sill drawing.

しかる１友、壱′４９図と弔］０図に示すように、バル
ジ加工により、力ｌ・部の突出部（２）　’ｗ成形し−
でも、Ｉ；ｔ’、’　ｌ天〃オリ例にすパけるのと同様
のカッ・シャフト（５）ヲ製造することが−Ｃきイ〕、
。However, as shown in Figure 1' 49 and Condolences], by bulge machining, the protruding part (2) 'w of the force l section is formed.
However, it would be better to manufacture a shaft (5) similar to the one used in the original example.
.

本実施例も一：上／こ、前実施例と同様の作用と効果が
ある。This embodiment also has the same functions and effects as the previous embodiment.

・１回向の１ＩＩｉ′１県な説、明り）１１図は、本発明の第１実／ｌｆｆ１例において用
いる素管の中火縦断１ト而図、第２図は、第１図１１−１１趣Ｉ断面図、第３図は、第
１実施例におけるバルジ加工を１］つだ素管の中央縦断
ｉ１：而図面第４図は、第３図ＩＶ−ＩＶ線断面図、第５図は、カム
シャフトの中央縦断ＩＦ向図、第６図−１、第５図■−
■糺１断面図、第７図（は、本発明の化２象、施１＋ｌ
Ｊにおける絞り加工を行った素管の中央Ｍ回正面図、第８図は、第７図＼）ｔｌ　−Ｖｌｌｌ線１祈而図、面
図図は、カムシャフトの中央縦断止、面図、第１０図は
、第９図Ｘ−ＸＮ回向図である。・1IIi'1 prefecture of one direction, light) Figure 11 is a medium-heat longitudinal cross-sectional view of the raw pipe used in the first example of the present invention/lff1, and Figure 2 is a diagram of Figure 1 11- Fig. 3 shows the bulge processing in the first embodiment, and Fig. 4 shows the cross-sectional view taken along line IV--IV in Fig. 3. are central longitudinal IF views of the camshaft, Figure 6-1, Figure 5 ■-
■Cross-sectional view of adhesive 1, Figure 7 (is the second embodiment of the present invention,
Figure 8 is a front view of the center M times of the blank tube that has been drawn at J. FIG. 10 is an X-XN diagonal diagram of FIG. 9.

Claims

[Claims] +1. , l is the same diameter as the short diameter of the cam portion of the desired camshaft. A method for manufacturing a hollow camshaft, which comprises forming a protruding part in a cam part by bulging a metal tube, and forming a shaft part and a bearing part by drawing. (2) A special Nf construction characterized by first bulge-processing the plain fabric to form the protruding part of the cam part, and then forming the Jl: 1lIII+ part and the bearing part by drawing process. The method described in the range quantity (1) term vc. (3) First, the shaft portion and the bearing portion are formed by machining, and the cam portion abutment 1B is formed by bulge machining. )).