JPS6219932B2 - - Google Patents
Info
- Publication number
- JPS6219932B2 JPS6219932B2 JP6176083A JP6176083A JPS6219932B2 JP S6219932 B2 JPS6219932 B2 JP S6219932B2 JP 6176083 A JP6176083 A JP 6176083A JP 6176083 A JP6176083 A JP 6176083A JP S6219932 B2 JPS6219932 B2 JP S6219932B2
- Authority
- JP
- Japan
- Prior art keywords
- block
- cold forging
- cut
- view
- asymmetrical
- 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.)
- Expired
Links
- 239000000463 material Substances 0.000 claims description 16
- 238000010273 cold forging Methods 0.000 claims description 10
- 210000002310 elbow joint Anatomy 0.000 claims description 7
- 238000003754 machining Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000005553 drilling Methods 0.000 claims 1
- 238000005452 bending Methods 0.000 description 6
- 238000005242 forging Methods 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/14—Making machine elements fittings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Branch Pipes, Bends, And The Like (AREA)
- Forging (AREA)
Description
【発明の詳細な説明】
発明の技術分野
本発明は、鍛造により製作されるエルボジヨイ
ント等の非対称形部品の製造方法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a method of manufacturing an asymmetrical component such as an elbow joint manufactured by forging.
技術的背景およびその問題点
一般にエルボジヨイント等の非対称形の部品は
熱間鍛造によりブロツクを形成した後に機械加工
により仕上げている。このブロツク形成に冷間鍛
造により加工すれば正確な形状を求められる筈で
あるが、エルボジヨイントのようにＬ字形で非対
称のものは冷間鍛造では製作することができず、
やむを得ず熱間鍛造により製作しているものであ
る。そのため、熱間鍛造による場合には、寸法的
なバラツキが大きいためにコイニングにより寸法
の一定化をはかつた後に機械加工をしている。し
かしながら、材料的に無駄が多く、組織も粗材の
ときと変つてしまうので強度が低下するものであ
る。Technical Background and Problems Generally, asymmetrical parts such as elbow joints are formed into blocks by hot forging and then finished by machining. If this block was formed by cold forging, it would be possible to obtain an accurate shape, but L-shaped and asymmetrical items such as elbow joints cannot be manufactured by cold forging.
It is manufactured by hot forging out of necessity. Therefore, when hot forging is used, dimensional variations are large, so machining is performed after the dimensions are made constant by coining. However, there is a lot of waste in terms of material, and the structure changes from that of the raw material, resulting in a decrease in strength.
発明の目的
本発明は、冷間鍛造により製作することができ
るエルボジヨイント等の非対称形部品の製造方法
を得ることを目的とする。OBJECTS OF THE INVENTION The object of the present invention is to provide a method for manufacturing asymmetrical parts such as elbow joints that can be manufactured by cold forging.
発明の概要
本発明は、一定長さに切断された素材を両側に
対称形状の曲げ部を形成するように加工するの
で、冷間鍛造による加工が可能になり、その後に
中央部を切断してＬ字形の非対称形状のブロツク
を形成するようにしたので、寸法精度が高くて機
械加工時のチヤツキングも安定しており、加工代
も少なくて材料費が低くてよく、冷間鍛造時の組
織を利用することができるため、強度も高いよう
に構成したものである。Summary of the Invention In the present invention, a material cut to a certain length is processed to form a symmetrical bent part on both sides, so processing by cold forging is possible, and then the central part is cut. Since the L-shaped asymmetric block is formed, dimensional accuracy is high, chucking during machining is stable, machining allowance is small, material costs are low, and the structure during cold forging is improved. It is designed to have high strength because it can be used for various purposes.
発明の実施例
本発明の一実施例を図面とともに説明する。ま
ず、丸棒による素材１を一定の長さに切断する。
そして、この素材１の両側に平面部２が形成され
るようにその厚さを一定にし、第３図に示すよう
に曲げダイ３内にセツトする。そして、曲げパン
チ４により第４図に示すように両側に対称形の曲
げ部５が形成されるように曲げ加工をするが、こ
のときの素材１の変形は左右対称形であるため、
冷間鍛造による加工に全く無理がない。Embodiment of the Invention An embodiment of the present invention will be described with reference to the drawings. First, a round bar material 1 is cut into a certain length.
Then, the thickness of the material 1 is made constant so that flat portions 2 are formed on both sides of the material 1, and the material 1 is set in a bending die 3 as shown in FIG. Then, bending is performed using the bending punch 4 so that symmetrical bent portions 5 are formed on both sides as shown in FIG. 4, but since the deformation of the material 1 at this time is symmetrical,
Processing by cold forging is completely reasonable.
ついで、第５図に示すように押し出しダイ６内
にセツトして押し出しパンチ７により冷間鍛造す
ると、第７図に示すようにコの字形の鍛造品８が
形成される。この鍛造品８の外形寸法はきわめて
正確である。つぎに、このような鍛造品８を中央
で切断して二分し、二個のブロツク９を形成す
る。このブロツク９を機械加工して各端部にねじ
部１０，１１を形成するとともに、内部にＬ字形
の孔１２を形成して非対称形部品としてのエルボ
ジヨイント１３が完成される。 Then, as shown in FIG. 5, it is set in an extrusion die 6 and cold forged with an extrusion punch 7, thereby forming a U-shaped forged product 8 as shown in FIG. The external dimensions of this forged product 8 are extremely accurate. Next, such a forged product 8 is cut in the center and divided into two parts to form two blocks 9. This block 9 is machined to form threaded portions 10 and 11 at each end, and an L-shaped hole 12 is formed inside to complete an elbow joint 13 as an asymmetrical part.
発明の効果
本発明は、上述のように素材の曲げおよび成形
時に対称形状の曲げ部を有するようにして行なう
ので、冷間鍛造による加工を無理なく行なうこと
ができ、これを中央から切断して非対称形状のブ
ロツクを形成し、このブロツクを機械加工するよ
うにしたので、機械加工時のチヤツキング等が容
易で操作性がよく、能率的であり、無駄な部分が
少ないので材料費も節約でき、とくに、加工費に
ついてみると熱間鍛造によるものに較べて30％も
低減することができ、しかも、冷間鍛造時の組織
をそのまゝ用いうるので、強度が高いものであ
る。Effects of the Invention In the present invention, as described above, the material is bent and formed so as to have a symmetrical bent portion, so cold forging can be performed without difficulty, and the material can be cut from the center. By forming a block with an asymmetrical shape and machining this block, chucking during machining is easy, operability is good, and efficiency is achieved.There are few wasted parts, so material costs can be saved. In particular, processing costs can be reduced by 30% compared to hot forging, and since the structure from cold forging can be used as is, the strength is high.
図面は本発明の一実施例を示すもので、第１図
ａ，ｂは素材の正面図と側面図、第２図ａ，ｂは
幅決め後の素材の正面図と側面図、第３図は曲げ
加工直前の縦断正面図、第４図は曲げ加工終了時
の縦断正面図、第５図は押し出し加工直前の縦断
正面図、第６図は押し出し加工直後の縦断正面
図、第７図ａ，ｂは鍛造品の正面図と側面図、第
８図はブロツクの正面図、第９図はエルボジヨイ
ントの正面図である。
１……素材、５……曲げ部、９……ブロツク。
The drawings show one embodiment of the present invention, and FIGS. 1a and b show a front view and a side view of the material, FIGS. 2a and b show a front view and a side view of the material after width determination, and FIG. 3 is a longitudinal front view immediately before bending, Fig. 4 is a longitudinal front view at the end of bending, Fig. 5 is a longitudinal front view immediately before extrusion, Fig. 6 is a longitudinal front view immediately after extrusion, and Fig. 7a. , b are front and side views of the forged product, FIG. 8 is a front view of the block, and FIG. 9 is a front view of the elbow joint. 1...Material, 5...Bending part, 9...Block.
Claims (1)
の素材の両側に対称形状の曲げ部が形成されるよ
う冷間鍛造により曲げ加工し、この冷間鍛造後に
中央部を切断してＬ字形のブロツクを形成し、こ
のブロツクに孔加工およびねじ切り等の機械加工
を施すようにしたことを特徴とするエルボジヨイ
ント等の非対称形部品の製造方法。1 Cut a material such as a round bar to a certain length, bend it by cold forging so that a symmetrical bent part is formed on both sides of the material, and after this cold forging, cut the center part and make an L. 1. A method for manufacturing an asymmetrical part such as an elbow joint, which comprises forming a block in the shape of a letter, and subjecting the block to machining such as drilling and threading.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6176083A JPS59185538A (en) | 1983-04-07 | 1983-04-07 | Production of asymmetrical parts like elbow joint or the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6176083A JPS59185538A (en) | 1983-04-07 | 1983-04-07 | Production of asymmetrical parts like elbow joint or the like |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59185538A JPS59185538A (en) | 1984-10-22 |
| JPS6219932B2 true JPS6219932B2 (en) | 1987-05-01 |
Family
ID=13180421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6176083A Granted JPS59185538A (en) | 1983-04-07 | 1983-04-07 | Production of asymmetrical parts like elbow joint or the like |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59185538A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009130776A1 (en) * | 2008-04-24 | 2009-10-29 | 木村 洋一 | Small-size precision bent tube joint and assembly for reducing sum total of specific environmetal load, process for producing the small-size precision bent tube joint and assembly, and mold and working machine for execution of the process |
| CN102198581B (en) * | 2011-05-19 | 2013-06-05 | 青岛鸿森重工有限公司 | Manufacturing process for air temperature adjusting bottom plate mechanism |
| CN103273275A (en) * | 2013-06-13 | 2013-09-04 | 沈阳飞机工业（集团）有限公司 | Numerical control machining method of bending pipe die free of benchmark |
| CN108620518B (en) * | 2018-05-04 | 2020-01-31 | 建龙北满特殊钢有限责任公司 | forging method for reducing weight of arched plate forging for coiler mandrel |
-
1983
- 1983-04-07 JP JP6176083A patent/JPS59185538A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59185538A (en) | 1984-10-22 |
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