KR0182078B1 - Fracture division of connecting rod - Google Patents
Fracture division of connecting rod Download PDFInfo
- Publication number
- KR0182078B1 KR0182078B1 KR1019950046382A KR19950046382A KR0182078B1 KR 0182078 B1 KR0182078 B1 KR 0182078B1 KR 1019950046382 A KR1019950046382 A KR 1019950046382A KR 19950046382 A KR19950046382 A KR 19950046382A KR 0182078 B1 KR0182078 B1 KR 0182078B1
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- South Korea
- Prior art keywords
- connecting rod
- forging
- fracture
- manufacturing
- breaking
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
- F16C7/02—Constructions of connecting-rods with constant length
- F16C7/023—Constructions of connecting-rods with constant length for piston engines, pumps or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2220/00—Shaping
- F16C2220/20—Shaping by sintering pulverised material, e.g. powder metallurgy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2220/00—Shaping
- F16C2220/40—Shaping by deformation without removing material
- F16C2220/46—Shaping by deformation without removing material by forging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2326/00—Articles relating to transporting
- F16C2326/01—Parts of vehicles in general
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
- F16C9/04—Connecting-rod bearings; Attachments thereof
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Forging (AREA)
Abstract
본 발명은 자동차나 콤프레서 등 산업기계부품인 커넥팅로드의 파단분할 제조방법에 관한 것으로서, 커텍팅로드를 분리코져하는 방향으로 파단 안내부를 제조하여 여기에 집중하중을 가하여 원하는 방향으로 판단 분할되게한 것이다.The present invention relates to a method of manufacturing the splitting of the connecting rod, which is an industrial machine part such as an automobile or a compressor, to manufacture the breaking guide part in the direction of separating and removing the connecting rod, and to apply the concentrated load thereto to determine the splitting in the desired direction. .
Description
제1도는 본 발명의 파단분할법을 이용한 제조방법의 개략도.1 is a schematic view of a manufacturing method using the breaking fraction method of the present invention.
a도는 파단분할공정의 개념.a is the concept of fracture splitting process.
b도는 파단분할면의 단면.b is the cross section of the fracture splitting surface.
제2도는 본 발명의 돌기를 이용한 파단분할 안내면 제조방법.Figure 2 is a method for producing a fracture split guide surface using the projection of the present invention.
제3도는 본 발명의 돌기를 이용하여 분말단조품에 형성된 파단분할용 안내부.3 is a rupture splitting guide formed in the powder forging using the projection of the present invention.
제4도는 본 발명에서 각 공정별 파단분할면의 조직.4 is a structure of the fracture splitting surface for each process in the present invention.
a도는 단조후 공냉과 냉각처리.a degree air-cooled and cooled after forging.
b도는 단조후 수냉과 냉각처리.b is water forging and cooling after forging.
c도는 단조후 유냉과 냉각처리.c is oil cooled and cooled after forging.
본 발명은 자동차나 콤프레서 등 산업기계부품인 커넥팅로드의 파단분할 제조방법에 관한 것이다.The present invention relates to a method for producing breakage of a connecting rod, which is an industrial machine part such as an automobile or a compressor.
직선운동을 회전운동으로 바꾸는 구동부품 가운데 가장 많이 사용되는 부품인 커넥팅로드는 상대부품과의 치수공차를 위해 지금까지는 결합부위를 정밀가공한(연마)후 볼트와 너트를 이용하여 결합하는 제조법을 이용하여 왔다. 자동차 엔진부품으로 많이 쓰이는 커넥팅로드와 같은 부품은 크랭크샤프트와 결합을 위해 캡(Cap)부와 몸체(Body)부에 형성되는 원의 진원도가 매우 정밀해야 한다. 따라서, 지금까지는 제1도와 같이 캡부(1)와 몸체부(2)를 별도로 제조한 후 진원을 유지하도록 정밀한 연마와 내경가공과 볼트구멍 가공을 통하여 제조하거나, 캡부와 몸체부를 일체형(대단부내경 : 타원)으로 제조한 후 진원 가공을 통하여 제조하여 왔다.Connecting rod, which is the most used component that converts linear motion into rotational motion, uses the manufacturing method that uses bolts and nuts after precision machining (polishing) the coupling part until now for dimensional tolerance with the counterpart. Has come. Parts such as connecting rods, which are widely used in automobile engine parts, must have very precise roundness of the circle formed in the cap part and the body part to be combined with the crankshaft. Thus, until now, as shown in FIG. 1, the cap part 1 and the body part 2 are manufactured separately, and then manufactured through precise grinding, inner diameter processing, and bolt hole processing to maintain the roundness, or the cap part and the body part are integrated (large end diameter). : Elliptical), and has been produced through round processing.
이러한 제조법은 상대 부품과의 결합을 위해 볼트와 너트의 결합력을 매우 강하게 해야 하며 진원 유지를 위해 가공공정 동안에 매우 정밀한 지그와 많은 가공시간이 필요하다.This method requires a very strong coupling force between the bolt and the nut for the mating parts, and requires very precise jig and much processing time during the machining process to maintain the roundness.
반면, 본 발명에서 개발한 파단분할법은 분리를 하고자 하는 방향으로 파단안내부를 제조하여 여기에 집중하중을 가하여 원하는 방향으로 파단분할이 되도록 하는 방법이다. 이하 발명의 요지를 그 실시예의 도면에 연계시켜 상세히 설명한다. 제1도는 파단분할법을 이용한 커넥팅로드 제조법을 나타내고 있다. 본 파단분할법을 이용하게 되면 분리된 면이 요철모양(A)이 되어 실제면적이 증가하기 때문에(투영면적은 동일) 분리된 면의 결합면적이 증가하며 그와 함께 두 부분의 파단면이 암수를 이루는 형태이므로 재결합이 수월해지고 결합력 또한 증가하게 된다. 또한, 본 파단분할법을 이용하게 되면 커넥팅로드 제조(주조, 단조 등)시 대단부의 내경을 타원(기존제조법)이 아닌 진원으로 제조할 수 있는 잇점이 있다.On the other hand, the fracture splitting method developed in the present invention is a method of making the fracture guide part in the desired direction by applying a concentrated load to the fracture guide part in the direction to be separated. The subject matter of the present invention will be described in detail with reference to the drawings of the embodiments. 1 shows a method of manufacturing a connecting rod using a break split method. When the fracture splitting method is used, the separated surface becomes uneven (A) and the actual area increases (the projection area is the same), so that the combined area of the separated surface increases, and the fracture surface of the two parts becomes Because of this form, the recombination is facilitated and the bonding force is also increased. In addition, the use of the fracture splitting method has the advantage that the inner diameter of the end portion of the connecting rod during manufacture (casting, forging, etc.) can be manufactured in a round shape instead of an ellipse (traditional manufacturing method).
파단분할법은 파단분할용 안내부를 제조하는 기술과 안내부가 형성된 제품을 파단하는 장치 및 파단분할방법이 그 핵심기술이며 본 발명은 파단분할용 안내부를 제좋는 기술에 관한 것이며 파단불할장치 및 그 방법은 등록번호 128496호에 기술되어 있다.The break splitting method is a technology for manufacturing a split guide part, a device for breaking a product formed with a guide part, and a split split method thereof. The present invention relates to a technique for better breaking split guide part. Is described in reg. No. 128496.
파단안내부는 US 4,569,109, US 4,768,694 등에 기술되 있는 바와 같이 주조, 단조, 기계가공과 같은 다양한 방법으로 제조할 수 있으며 본 발명은 분말단조로 케넥팅로드를 제조할 때 사용되는 기술로서 분말야금으로 제조된 예비성형체에 쐐기모양의 돌기를 형성하여 단조 후 돌기부위가 파단분할용 안내부 역할을 할 수 있도록 하는 제조기술이다.Break guide portion can be manufactured by various methods such as casting, forging, machining as described in US 4,569,109, US 4,768,694, etc. The present invention is a technique used when manufacturing the connecting rod by powder forging produced by powder metallurgy It is a manufacturing technology that forms a wedge-shaped protrusion on the preformed body to allow the protrusion part to serve as a guide for breaking after the forging.
제2도는 커넥팅로드 예비성형체에 쐐기 모양의 돌기(3)를 형성하여 단조후 파단 안내부(4)를 제조하는 방법을 도식적으로 나타낸 그림이다. 분말야금으로 내측면에 쐐기 모양의 돌기가 형성된 예비성형체(Preform)(5)를 1,000~1,200℃로 가열한 후 정밀단조를 거치면 소재가 유동되어 금형(Core-rod)(6)의 치수와 동일하게 변형되면서 내부에 파단안내부(4)가 형성된다.2 is a diagram schematically illustrating a method of manufacturing the broken guide part 4 after forging by forming a wedge-shaped protrusion 3 on the connecting rod preform. Powder preform (5) formed with wedge-shaped projections on the inner surface of metallurgy is heated to 1,000 ~ 1,200 ℃, and then subjected to precision forging. Breaking guide portion 4 is formed therein while being deformed.
또한, 제3도는 분말야금으로 제조된 예비성형체에 형성되어 있는 돌기가 단조 후 파단분할용 안내부로 제조된 모습을 나타내고 있다. 분말단조는 분말야금으로 단조용 예비성형체를 제조한 후 이를 정밀열간단조를 통해 최종 단조품을 제좋는 기술로서 일반적인 단조와는 달리 예비성형체의 제조가 필수적이며 따라서, 예비성형체 제조시 돌기를 형성하여 단조에 의해 파단안내부를 제조하는 기술은 파단용 안내부(예 : 노치)를 기게가공에 의해 제조하는 경합공정 보다 많은 잇점이 있다. 이렇게 제조된 파단용 안내부는 파단시 하중이 작용되면 파단안내부가 형성되어 있는 방향으로 크랙(Crack)이 발생, 진전되어 원하는 방향으로 파단이 이루어지며, 파단시 커넥팅로드 대단부가 변형이 발생되지 않도록 주의를 해야 한다. 대단부의 변형을 방지하기 위해서는 재료의 취성을 증가시키는 방법을 이용할 수 있다. 재료의 취성을 증가시키면 파단분할에 필요한 요구하중을 감소시킬 수 있고 치수의 변화를 방지할 수 있다. 파단분할을 행할 부위에 액체질소를 통과시켜 원하는 부위(파단안내부)의 취성을 증가시킨 후 파단하게 되면 파단시 요구하중을 감소시킬 수 있으며 비파단부 위의 변형도 방지할 수 있어 제품의 특성에 영향을 미치지 않고 분할을 할 수 있다.In addition, FIG. 3 shows a state in which the protrusions formed on the preform made of powder metallurgy are made of the guide part for breaking after forging. Powder forging is a technique for producing a preform for forging with powder metallurgy and then forging the final forging through precision hot forging. Unlike general forging, it is necessary to manufacture the preform, and therefore, forging the process by forming protrusions The technique of producing the break guide by means of the advantage is more than the competition process of manufacturing the break guide (eg notch) by machine processing. When the breaking guide part is manufactured in this way, a crack is generated in the direction in which the breaking guide part is formed when the load is applied, and the breaking is performed in the desired direction, so that the breaking part of the connecting rod is not deformed when breaking. Should. In order to prevent deformation at the extreme end, a method of increasing the brittleness of the material may be used. Increasing the brittleness of the material can reduce the required load required for breaking and prevent the change of dimensions. If the liquid nitrogen is passed through the site to be broken, the brittleness of the desired part (break guide part) is increased and then broken, it can reduce the required load at the time of breaking and prevent deformation on the non-breaking part. Partitioning can be done without affecting.
분말단조 커넥팅로드는 예비성형체의 열간단조 후 냉각방법에 따라 그 조직이 다르게 형성되므로 냉각상태에 따라서 파단분할의 양상 또한 다르게 나타난다. 제4도는 각 냉각방법에 따른 파단면 사진으로 각 공정에 따라 파단면에 나타나 있는 딤플(Dimple)의 크기 및 모양이 다르게 나타나고 있다. 따라서, 최적의 파단분할면을 얻기 위해서는 단조 후 냉각을 최적상태로 제어한 후 파단분할을 실시하는 것이 요구된다.Since the structure of the powder forged connecting rod is formed differently according to the cooling method after hot forging of the preform, the aspect of fracture splitting also appears according to the cooling state. 4 is a picture of the fracture surface according to each cooling method, the size and shape of the dimples shown on the fracture surface are different according to each process. Therefore, in order to obtain an optimum fracture dividing surface, it is required to perform fracture division after controlling the cooling after forging to an optimum state.
본 발명에 의하여 분리된 커넥팅로드 대단부의 파단면은 파단면 고유의 거친 형태가 되며, 캡부와 몸체부에 각각 형성된 파단면은 서로 암수의 형태로 형성되므로 재결합시 제위치를 정확하게 찾아가며, 접촉면적이 증가하는 역할에 의해 결합력이 증가되므로 볼트와 너트에 의한 결합체계를 너트없는 볼트체계만으로도 요구 결합력을 충분히 얻을 수 있기 때문에 부품수 및 중량 감소에 따른 엔진 효율 증대와 공정 단축에 따른 원가절감 효과를 얻을 수 있다.The fracture surface of the connecting rod large end separated by the present invention becomes a rough shape inherent in the fracture surface, and the fracture surfaces formed in the cap part and the body part are formed in the shape of male and female, so that when the recombination is repositioned, the contact area is precisely located and the contact area is As the binding force is increased by this increasing role, the required coupling force can be obtained by using only the bolt-less nut system for the bolt and nut coupling system. Therefore, the engine efficiency is increased due to the reduction of the number of parts and weight, and the cost reduction effect is shortened. You can get it.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950046382A KR0182078B1 (en) | 1995-12-04 | 1995-12-04 | Fracture division of connecting rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950046382A KR0182078B1 (en) | 1995-12-04 | 1995-12-04 | Fracture division of connecting rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR970045860A KR970045860A (en) | 1997-07-26 |
| KR0182078B1 true KR0182078B1 (en) | 1999-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019950046382A KR0182078B1 (en) | 1995-12-04 | 1995-12-04 | Fracture division of connecting rod |
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| KR (1) | KR0182078B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160118866A (en) | 2015-04-03 | 2016-10-12 | 김정만 | Sunvisor for a vehicle |
-
1995
- 1995-12-04 KR KR1019950046382A patent/KR0182078B1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160118866A (en) | 2015-04-03 | 2016-10-12 | 김정만 | Sunvisor for a vehicle |
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| Publication number | Publication date |
|---|---|
| KR970045860A (en) | 1997-07-26 |
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