JPS5873704A - Sizing method for sintered parts - Google Patents
Sizing method for sintered partsInfo
- Publication number
- JPS5873704A JPS5873704A JP17082781A JP17082781A JPS5873704A JP S5873704 A JPS5873704 A JP S5873704A JP 17082781 A JP17082781 A JP 17082781A JP 17082781 A JP17082781 A JP 17082781A JP S5873704 A JPS5873704 A JP S5873704A
- Authority
- JP
- Japan
- Prior art keywords
- punch
- sintered
- sizing
- sintered part
- die
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、焼結部品の外径円筒度の精度を向上させるた
めのサイジング方法に関する４ので島る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sizing method for improving the accuracy of outer diameter cylindricity of sintered parts.
サイジングとは、焼結成形した部品をプレスしてその歪
取シを行う加工を意味するが、従来のサイジング法１％
に、第１図に示すような歯部１ａと中間部１ｂとの段差
ＬＸが小さい焼結部品１の場合Ｋｆ１．焼結部品１の外
径部分の円筒度を出すために、内側部分ＩＣの形状と同
形状のｌ１２ａを有するパンチ２を使用し、加圧時にこ
の１１２＆を内側部分１ｃ Ｋ １１！つて圧入させる
ことにより。Sizing refers to the process of pressing sintered parts to remove distortion, but the conventional sizing method is 1%
In the case of a sintered part 1 with a small step LX between the tooth portion 1a and the intermediate portion 1b as shown in FIG. 1, Kf1. In order to obtain cylindricity in the outer diameter portion of the sintered part 1, a punch 2 having l12a having the same shape as the inner portion IC is used, and when pressurized, this 112& is inserted into the inner portion 1c K 11! By press-fitting.
歯部１ａが内側へ変形しないように拘束しつつサイジン
グ加工を施している。このように、一部１＆と中間部１
ｂとの段差Ｌ１が小さめ場合には、十分な円筒度を確保
し得るのであるが、パゝ第２ＷＪに示すように、歯部−
と中間部３ｂとの段差Ｌ２が大きな焼結部品３の場合に
は、その内側部分３０に型２１Ｌを沿わせて型打ちする
のみでは、サイジング後の外枠円筒度を十分に確保でき
ないのである。すなわち、第２図示の焼結部品３が昇化
１２０φであるとすると、その外型円筒部は上側が下側
よりも直性でＱ、１ｍｍ小さなテーパ状に表るのである
。また、サイジング加工前の粗Ｗとしての焼結部品３が
抜き勾配としてその内側部分３ｃに１″〜３″のテーパ
を有している場合には、とのテーパ角度と型きのテーパ
角度とを合わせながら平面部をサイジングしようとする
と、型かと内側部分３ｃとの崗テーパ面の当シを１寸法
上。The sizing process is performed while restraining the tooth portion 1a from deforming inward. In this way, part 1 & and middle part 1
If the step L1 with respect to b is small, sufficient cylindricity can be secured, but as shown in the second WJ of the piston, the tooth part -
In the case of a sintered part 3 with a large step L2 between the inner part 30 and the intermediate part 3b, sufficient cylindricity of the outer frame after sizing cannot be ensured simply by placing the mold 21L along the inner part 30 of the sintered part 3. . That is, assuming that the sintered part 3 shown in the second figure has a diameter of 120φ, the upper side of the outer cylindrical part is straighter than the lower side and appears in a tapered shape with Q1 mm smaller. In addition, when the sintered part 3 as a rough W before sizing processing has a taper of 1'' to 3'' on its inner part 3c as a draft, the taper angle of and the taper angle of the mold If you try to size the flat part while matching the sizing, it will be one size larger than the contact between the mold and the inner part 3c of the granite taper surface.
十分にとることができないため、前記した場合と同様に
、外径円筒部は上側が下側よシも小さなテーパ状になる
。Since this is not possible, the outer diameter cylindrical portion has a small taper shape on the upper side as well as on the lower side, as in the case described above.
本発明の目的は、薄肉で、かつ段差の大きな焼結部品を
加工する場合にも、加工後の外径円筒部の円筒膨管十分
に確保することがで勇る焼結部品のサイジング方法を提
供することにある。The purpose of the present invention is to provide a sizing method for sintered parts that is effective in ensuring a sufficient cylindrical expansion tube in the outer diameter cylindrical part after processing, even when processing thin-walled sintered parts with large steps. It is about providing.
本発明の構成上、特徴となるところは、焼結部品の内側
面に圧入されるパンチの局面に突起、 部分を形成しＳ
仁のパンチによって焼結部品をダイスに゛加圧して挿入
する際、前記突起部分が焼結部品の内側面のパンチ圧入
側端部に拡張部分を形成し、焼結部品の上側が前記突起
部分によって、内方へ湾曲不可能に拘束されるサイジン
グ方法である。これによって、焼結部品の外径円筒部は
十分な円筒度を確保し得ることとなる。The feature of the present invention is that a protrusion or part is formed on the surface of the punch that is press-fitted into the inner surface of the sintered part.
When the sintered part is pressurized and inserted into the die by a solid punch, the protruding part forms an expanded part at the end of the inner surface of the sintered part on the punch press-fit side, and the upper side of the sintered part is inserted into the die. This is a sizing method that prevents inward bending. Thereby, the outer diameter cylindrical portion of the sintered component can ensure sufficient cylindricity.
以下１本発明の一実施例を第３図ないし＃！７図に基づ
いて説明する。An embodiment of the present invention is shown below in Figures 3 to #! This will be explained based on FIG.
＠３図は、加圧前の状ｒｔ示し、パンチ４とダイス５と
の間に粗材としての焼結部品６が位置している。パンチ
４は、パンチ４の焼結部品側端面ムからニー足高さの位
置に環状の突起部分４ｂｔ−有し、この・１”突起部分
４ｂ Ｉｆｉ＆バンチ４の径のＯＡ％〜０．５１ｓ大径
か、あるいは０．３ｍｍ 〜０．７ｍｍだけ大径となし
、また、突起部分４ｂの軸方向の長さＦｉ３ｍｘａ〜７
ｍｍとしである。ただし、・、午の数値は焼結部品６の
内側径が４３φ〜１１３φの径を有し、更に、その軸長
Ｌ３が１５ｍｍ〜２２ｍｍの場合である。４ｃは、ダイ
ス５の歯部−と噛み合うための歯部を示し、第６図に示
す４ｄ＃′ｉパンチ取付用のボルト孔である。Figure @3 shows the state rt before pressurization, and the sintered part 6 as a raw material is located between the punch 4 and the die 5. The punch 4 has an annular protrusion 4bt at a knee height from the end surface of the sintered component side of the punch 4, and this 1" protrusion 4b Ifi & OA% of the diameter of the bunch 4 ~ 0.51s large The diameter is increased by 0.3 mm to 0.7 mm, and the axial length of the protruding portion 4b is Fi3mxa to 7.
It is mm. However, the numerical values of . and 0 are for the case where the inner diameter of the sintered component 6 is 43φ to 113φ, and the axial length L3 is 15 mm to 22 mm. Reference numeral 4c indicates a tooth portion for meshing with the tooth portion of the die 5, and is a bolt hole for attaching a punch 4d#'i shown in FIG.
次に１作用を説明すると、先ず、パンチ４が焼結部品６
の内＠ｒｊｊＪ＆３内に入プ、突起部４ｂによって、仁
の内側面６Ｃのパンチ圧入側端部が拡張され、これによ
り、この部位に拡張部分蝕が形成される仁ととなる。こ
の状態において、パンチ４と焼結部品６とは一体となっ
てダイス５に圧入さ・れ、加圧される。このとき、焼結
部品６の拡張部分＆はパン、チ４の突起部４ｂと嵌合し
。Next, to explain one action, first, the punch 4
The protruding portion 4b expands the punch press-fit side end of the inner surface 6C of the chip, thereby forming a chip in which an enlarged partial erosion is formed at this location. In this state, the punch 4 and the sintered part 6 are integrally press-fitted into the die 5 and pressurized. At this time, the expanded portion & of the sintered part 6 fits into the protrusion 4b of the punch 4.
拘束されているため、内＠面釦の焼結部品内方へのたお
れ込みは生じない。すなわち、ダイス５に焼結部品６が
圧入されたとき、内側面勿のパンチ圧入８１８部は、突
起部４ｂの存在によって常に拡張された状態を保つので
ある。そして。Since it is restrained, the inner @ surface button does not fold inward into the sintered part. That is, when the sintered part 6 is press-fitted into the die 5, the punch press-fit portion 818 on the inner surface always remains expanded due to the presence of the protrusion 4b. and.
ダイス５による焼結部品６の成形後、パンチ１は焼結部
品６’ｔダイス５内に残したまま上昇し。After forming the sintered part 6 by the die 5, the punch 1 moves up while leaving the sintered part 6' in the die 5.
最後に、焼結部品６＃ｉダイス５から抜き出される。Finally, the sintered part 6#i is extracted from the die 5.
第４崗及び第５Ｖ４には、サイジング終了後における焼
結部品６が示されており１図中、６ａは歯部、６ｂは中
間部を表わす。The sintered part 6 after the completion of sizing is shown in the fourth column and the fifth V4, and in FIG. 1, 6a represents the tooth portion, and 6b represents the intermediate portion.
以上、説明したように一本発明の焼結部品のサイジング
方法によれば、焼結部品管ダイスに圧入して加圧する際
、焼結部品の内ｌｉ１′ｒｋＪのパンチ圧入側端部はパ
ンチの突起部によって内方へのたおれ込みが不可能に％
ｉＪ束されているから。As described above, according to the method for sizing a sintered part of the present invention, when the sintered part is press-fitted into a pipe die and pressurized, the punch press-fit side end of li1'rkJ of the sintered part is Protrusions make it impossible to fold inward%
Because iJ is bundled.
薄肉でかつ段差の大きな焼結部品をサイジング加工する
場合にも、・加工後の外径円筒部の円筒度を十分に確保
し得るという効果を生ずる。Even when sizing a sintered part that is thin and has a large step difference, the cylindricity of the outer diameter cylindrical portion after processing can be ensured sufficiently.
第１図は従来のサイジング工程を示す断面図。
第２図は薄肉でかつ段差の大きな焼結部品の断面図、第
３図は本発明のサイジング工程の加圧前の状態における
断面図、第４図は本発明のサイジング終了後の焼結部品
の断面図、第５図は本発明のサイジング加工後の焼結部
品、、とパンチとの関係を表わす断面図、第６図は本発
明のパンチの断面図、第７図は第６図の突起部の拡大断
面図である。
４・・０パンチ。
４ｂ−・・・突起部。
４８１１１１１１１１歯部。
６・−・・焼結部品。
６ｃ・・・・内側面。
け・・・−拡張部分。
第１図 第２図
第３図
第５図
第６図
ＡFIG. 1 is a sectional view showing a conventional sizing process. Figure 2 is a cross-sectional view of a sintered part that is thin and has large steps, Figure 3 is a cross-sectional view of the sintered part before pressurization in the sizing process of the present invention, and Figure 4 is a sectional view of the sintered part after the sizing process of the present invention is completed. FIG. 5 is a cross-sectional view showing the relationship between the sintered part after sizing processing of the present invention and a punch, FIG. 6 is a cross-sectional view of the punch of the present invention, and FIG. 7 is a cross-sectional view of the punch of the present invention. FIG. 3 is an enlarged cross-sectional view of a protrusion. 4...0 punch. 4b--Protrusion. 4811111111 Tooth section. 6.--Sintered parts. 6c...inner surface. Ke...-Extension part. Figure 1 Figure 2 Figure 3 Figure 5 Figure 6 A
Claims (1)
って前記焼結部品をダイ、スに加圧して挿入する焼結部
品のサイジング方法において、前記パンチの馬面に形成
した突起部分により前記焼結部品の前記内側面の前記パ
ンチ圧入側端部に拡張部分を形成することｔ４？徴とす
る焼結部品のサイジング方法。 ・（２７特許請求の範囲第１項記載の焼結部品のすイジ
ング方法において、前記突起部分の高さを前記パンチの
径の０．４−ないしＯ，ＳＳとし、かつ、前記突起部分
の軸方向長さを４ｗｍないし５ｍｍとしたもの。 （３）％許請求の範囲第１項又は第２項記載の焼結部品
のサイジング方法において、前記突起部分を環状突起に
よって形成したもの。 （４） 特許請求の範囲第１項ないし一゛３項のうち
のいずれか１項に記載した焼結部品のサイジグ方法にお
いて、前記突起部分をＱ、３ｍｍないしα７ｍｍだけ大
径にすると共に、前配央起部分の長さを３ｍｍないし７
１１１１１としたもの。[Scope of Claims] (1) A sizing method for a sintered part in which the sintered part is pressurized and inserted into a die by a punch that is press-fitted into the inner surface of the sintered part; A sizing method for a sintered part, the method comprising: forming an expanded part at the punch press-fit side end of the inner surface of the sintered part by the formed protrusion. In the method for swiping a sintered part, the height of the protruding portion is 0.4-0.0, SS of the diameter of the punch, and the axial length of the protruding portion is 4 wm to 5 mm. (3) A method for sizing a sintered part according to claim 1 or 2, in which the protruding portion is formed by an annular projection. (4) Claims 1 to 13 In the method for sizing a sintered part described in any one of the above items, the diameter of the protruding portion is increased by Q, 3 mm to α7 mm, and the length of the front central origin is increased from 3 mm to α7 mm.
11111.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17082781A JPS5873704A (en) | 1981-10-27 | 1981-10-27 | Sizing method for sintered parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17082781A JPS5873704A (en) | 1981-10-27 | 1981-10-27 | Sizing method for sintered parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5873704A true JPS5873704A (en) | 1983-05-04 |
| JPS6252001B2 JPS6252001B2 (en) | 1987-11-02 |
Family
ID=15912060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17082781A Granted JPS5873704A (en) | 1981-10-27 | 1981-10-27 | Sizing method for sintered parts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5873704A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58205417A (en) * | 1982-05-07 | 1983-11-30 | ディ−ア・アンド・カンパニ− | Harvester |
-
1981
- 1981-10-27 JP JP17082781A patent/JPS5873704A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58205417A (en) * | 1982-05-07 | 1983-11-30 | ディ−ア・アンド・カンパニ− | Harvester |
| JPH047170B2 (en) * | 1982-05-07 | 1992-02-10 | Deere & Co |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6252001B2 (en) | 1987-11-02 |
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