KR890007161Y1 - Punch for accurate burring forming - Google Patents
Punch for accurate burring forming Download PDFInfo
- Publication number
- KR890007161Y1 KR890007161Y1 KR2019850003418U KR850003418U KR890007161Y1 KR 890007161 Y1 KR890007161 Y1 KR 890007161Y1 KR 2019850003418 U KR2019850003418 U KR 2019850003418U KR 850003418 U KR850003418 U KR 850003418U KR 890007161 Y1 KR890007161 Y1 KR 890007161Y1
- Authority
- KR
- South Korea
- Prior art keywords
- punch
- burring
- molding
- accurate
- forming
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/02—Perforating by punching, e.g. with relatively-reciprocating punch and bed
- B26F1/14—Punching tools; Punching dies
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- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
내용 없음.No content.
Description
제1도는 종래의 버링펀치를 보인 정면도.1 is a front view showing a conventional burring punch.
제2도는 종래 버링펀치에 의해 성형된 제품의 단면도.2 is a cross-sectional view of a product molded by a conventional burring punch.
제3도는 본 고안의 성형제품과 펀치의 관계를 보인 단면도.3 is a cross-sectional view showing the relationship between the molded product and the punch of the present invention.
제4도는 본 고안 버링펀치의 구조를 보인 정면도.Figure 4 is a front view showing the structure of the present invention burring punch.
제5도는 본 고안의 버링 성형 과정도.5 is a burring molding process of the present invention.
제6도는 버링성형 완료도.6 is a burring molding completed.
본 고안은 정밀 버링성형용 버링(Burring)펀치에 관한것으로, 종래에는 버링성형시 제1도와 같은 펀치를 사용하여 타발과 버링성형이 프레스 기계의 1행정내에서 순차적으로 이루어지도록 되어 있다.The present invention relates to a burring punch for precision burring molding, and in the related art, punching and burring molding are sequentially performed in one stroke of a press machine by using the punch as shown in FIG.
그러나 이렇게 성형된 제품을 절단해 보면 제2도의 상태처럼 A면은 제품이 요구하는 치수로 성형되나, B부분은 스플링백 현상에 의하여 내경이 수축되므로 축을 끼워 넣을수가 없다.However, when the molded product is cut, the surface A is shaped to the size required by the product as shown in FIG. 2, but the portion B is unable to fit the shaft because the inner diameter is contracted due to the sputtering phenomenon.
종래에는 이와같은 경우에 버링 내경을 기계가공하거나 프레스금형으로 2차 성형을 시켜왔기 때문에 가공비의 증대, 생산률의 저하, 불량과다등의 단점이 있었다.Conventionally, in this case, since the burring inner diameter has been machined or secondaryly molded into a press mold, there are disadvantages such as an increase in processing cost, a decrease in production rate, and excessive defects.
본 고안은 이러한 종래 버링펀치의 결점을 시정 보완하기 위해서 펀치가 하강하여 일단 구멍을 천공한후 상승복귀할때 스프링백 현상으로 수축된 내경을 펀치자체에서 다시 교정하여 줄수 있도록 구조를 개선하여 프레스 기계의 1행정만으로 제품의 요구 기능을 만족시킬수 있게한 것으로 이를 첨부도면에 의하여 상세히 설명하면 다음과 같다.The present invention improves the structure to compensate for the shortcomings of the conventional burring punch by improving the structure so that the inner diameter contracted by the springback phenomenon can be corrected again by the punch itself when the punch is lowered and once the hole is drilled and then the return is made. It is possible to satisfy the required function of the product by only one stroke of the following.
펀치(1)의 하단부에 버링성형을 위하여 재료에 기초 구멍을 타발해주는 타발핀(2)을 형성하고 그 윗쪽 몸체부를 원구형(3)으로 형성한 위에 요입부(4)가 형성되게 하므로서 타발핀(2)위에는 기초구멍을 넓히면서 버링높이를 형성시키기 위한 완만한 구면(5)으로 형성되고, 다시 윗쪽은 실체버링내면에 치수를 성형시킬수 있도록 펀치(1)의 굵기와 동일한 성형면(6)이 형성되면 다시 그 윗쪽은 타발된 구멍하단이 수축된 거슬 교정시키기위한 완만한 반대구면(7)으로 형성되게 한 것이다.In the lower end of the punch (1) to form a punching pin (2) for punching the base hole in the material for the burring molding, and the upper body portion is formed in a spherical shape (3) to form the recessed portion (4) On the paw pin (2) is formed with a smooth spherical surface (5) for forming a burring height while widening the base hole, and the upper side is formed with the same thickness as the thickness of the punch (1) to form a dimension on the inner surface of the actual burring (6). Once this is formed, the upper part of the punched hole is formed to have a smooth opposite spherical surface 7 for correcting the contracted backbone.
이와같이된 본 고안은 제5도에서와 같이 버링펀치(1)의 타발핀(2)이 소재에 버링기초구멍을 타발한후 프레스 기계에 의해 가속 하강되면 구면(5)에 의하여 구멍이 넓혀지면서 높이가 형성되며 이때 내면의 직선면은 펀치(1)의 외경과 동일한 직선 성형면(6)에 의해 최종 성형되고 제6도의 상태처럼 하강완료된 상태가 된다.In this way, the present invention is as shown in Figure 5 when the punching pin (2) of the burring punch (1) punches the burring base hole in the material and then accelerated and lowered by the press machine, the hole is widened by the spherical surface (5) In this case, the straight surface of the inner surface is finally formed by the straight molding surface 6, which is the same as the outer diameter of the punch 1, and is in a state of being completed to be lowered as shown in FIG.
그러나 이때 성형된 제품에는 스프링백 현상이 발생되어 내경이 수축되어 있으며 이상태에서 프레스기계가 상승하면 윗쪽의 반대구면(7)이 수축된 버링내면을 넓히면서 상승되고 뒤따라서 직선 성형면(6)에 의하여 이미 성형되었던 내면이 재 성형되므로 내면의 정밀한 공차를 유지시킬수 있고 수축 현상이 바로 잡아질수 있는 것이다.However, at this time, the molded product has a springback phenomenon, and the inner diameter is contracted. When the press machine rises in this state, the upper spherical surface 7 of the upper part is raised while widening the contracted burring inner surface, followed by the straight molding surface 6. Since the inner surface has already been molded, it can maintain precise tolerances on the inner surface and shrinkage can be corrected.
이렇게 된 본 고아은 프레스기어 1행정마으로 성형과 교정을 순차적으로 행할수 있기 때문에 버링내면 치수를 정밀하게 유지시킬수 있고 따라서 종래에 행하였던 내면의 기계 절삭 또는 교정공정 추가 등이 불필요하여 가공비의 증대 생산능률의 저하, 불량과다 발생등을 방지할수 있으며 원가절감 및 생산성향상을 꾀하수 있는효과를 가진다.Since this orphan can perform molding and straightening sequentially with one stroke of the press gear, it can maintain the internal dimension of the burring precisely, thus eliminating the need for the conventional mechanical cutting or the calibration process of the inner surface. It can prevent deterioration of efficiency and excessive occurrence of defects, and it has the effect of reducing costs and improving productivity.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2019850003418U KR890007161Y1 (en) | 1985-03-30 | 1985-03-30 | Punch for accurate burring forming |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2019850003418U KR890007161Y1 (en) | 1985-03-30 | 1985-03-30 | Punch for accurate burring forming |
Publications (2)
Publication Number | Publication Date |
---|---|
KR860011606U KR860011606U (en) | 1986-10-04 |
KR890007161Y1 true KR890007161Y1 (en) | 1989-10-20 |
Family
ID=19240978
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR2019850003418U KR890007161Y1 (en) | 1985-03-30 | 1985-03-30 | Punch for accurate burring forming |
Country Status (1)
Country | Link |
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KR (1) | KR890007161Y1 (en) |
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1985
- 1985-03-30 KR KR2019850003418U patent/KR890007161Y1/en not_active IP Right Cessation
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Publication number | Publication date |
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KR860011606U (en) | 1986-10-04 |
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