CN112719077A - Stamping head tool for semi-circular head rivet - Google Patents
Stamping head tool for semi-circular head rivet Download PDFInfo
- Publication number
- CN112719077A CN112719077A CN202011473495.1A CN202011473495A CN112719077A CN 112719077 A CN112719077 A CN 112719077A CN 202011473495 A CN202011473495 A CN 202011473495A CN 112719077 A CN112719077 A CN 112719077A
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- China
- Prior art keywords
- head
- stamping
- rivet
- rod
- punching press
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Insertion Pins And Rivets (AREA)
Abstract
A semi-circular head rivet punching head tool relates to a punching head tool. The invention aims to solve the problems that the semi-circular head rivet head which is punched by the existing tool scheme is incomplete in shape and has a part of flat head. The stamping device comprises a stamping rod (1) and a stamping head (2), wherein the stamping rod (1) is a cylindrical stamping rod, the stamping head (2) is a frustum-shaped stamping head, the stamping rod (1) and the stamping head (2) are coaxially and fixedly connected, a pit (3) is formed in the center of the small end face of the stamping head (2), exhaust holes (4) are formed in the stamping rod (1) and the stamping head (2) along the axial direction of the stamping rod and the stamping head, and the exhaust holes (4) are communicated with the pit (3). In the stamping process, the invention avoids forming a closed space in the concave slot of the stamping cap tire, and the rivet wire material is completely stamped and filled into the concave slot, thereby avoiding the generation of flat heads. The invention is used for rivet stamping.
Description
Technical Field
The invention relates to a stamping head tool, in particular to a semi-circular head rivet stamping head tool.
Background
The ideal state and the flat state of the half-round head rivet are shown in figure 1. The structure of the stamping head tooling for processing the rivet cap by optimizing the front stamping is shown in figure 2. The working principle is as follows: and (4) cold stamping the cut surface of the rivet wire by using a stamping head with a pit to form the rivet cap head. The ideal state parameters of the stamping head recess and the rivet head are the same.
The top of the stamped rivet head is usually incompletely stamped, and the residual rivet wire is cut into a flat head. According to the technical condition of acceptance inspection of the finished rivet product, the diameter Dp of the flat head part should not exceed 20 percent of the diameter D of the rivet head. In fact, in batch processing, some rivets are always rejected due to the over-tolerance of the size of the flat head. The quantity of batch processing is large, the rivet particles are small, and the identification and sorting capacity of 100 percent is not provided.
In conclusion, the semi-circular head rivet cap punched by the existing tool scheme has the problems of incomplete cap shape and partial flat head.
Disclosure of Invention
The invention aims to solve the problems that the semi-circular head rivet cap punched by the existing tool scheme is incomplete in shape and has a part of flat head. And then provides a semi-circular head rivet punching head tool.
The technical scheme of the invention is as follows: the utility model provides a first frock of semicircle head rivet punching press, it includes stamping rod and punching press head, and the stamping rod is cylindrical stamping rod, and the punching press head is frustum shape punching press head, and stamping rod and the first coaxial fixed connection of punching press, the little terminal surface central point department of putting of punching press head set up the slot, and the exhaust hole has all been seted up along its axis direction to stamping rod and punching press head, exhaust hole and slot intercommunication.
Further, the aperture of the vent hole is not more than 0.2 mm.
Further, the taper angle of the punch is 35-45 °.
Further, the taper angle of the punch is 40 °.
Furthermore, the end face of the stamping rod is provided with a chamfer.
Further, the center of the dimple is on the axis of the through hole, and the position error is not more than phi 0.05 mm.
Compared with the prior art, the invention has the following effects:
1. the invention carries out optimization design on the tooling for punching the semi-circular head rivet cap. The invention provides an engineering scheme for a half-round head rivet nut cap, which aims to eliminate or reduce the head of the nut cap, eliminate the diameter Dp of the flat head part from being more than 20% of the diameter D of the nut cap and improve the qualification rate of rivets. The problem that the inspection difficulty of the flat head of the rivet is high due to small size and large batch processing quantity of the rivet is effectively solved.
2. The invention analyzes the reason for the formation of the flat head of the rivet. The parameters of the stamping head concave slot and the ideal state of the rivet head are the same, the shape of the formed rivet head should be in the ideal state, namely a complete semicircle, and the flat head is remained in reality. Analysis shows that in the stamping process, a closed space is formed in a stamping head recess, air is compressed, the pressure is increased, the rivet wire material cannot be completely filled into the recess, and the compressed air partially forms a flat head of a screw cap. The invention discharges compressed air by arranging the aligning holes, thereby effectively solving the flat head problem of the rivet cap head in the processing process.
Drawings
FIG. 1 is a schematic view of an ideal half-head rivet. Fig. 2 is a schematic view of a flat head state.
FIG. 3 is a front view of a cap tire machined using a conventional tooling.
Fig. 4 is a partially enlarged view of fig. 3 at the cap recess a.
Figure 5 is a front view of the inventive tool.
Fig. 6 is a partially enlarged view at B in fig. 5.
Detailed Description
The first embodiment is as follows: the semi-circular head rivet stamping head tool comprises a stamping rod 1 and a stamping head 2, wherein the stamping rod 1 is a cylindrical stamping rod, the stamping head 2 is a frustum-shaped stamping head, the stamping rod 1 and the stamping head 2 are coaxially and fixedly connected, a concave groove 3 is formed in the center of the small end face of the stamping head 2, exhaust holes 4 are formed in the stamping rod 1 and the stamping head 2 along the axial direction of the stamping rod, and the exhaust holes 4 are communicated with the concave groove 3.
The rivet cap head processed by the stamping head tool of the embodiment is smooth, and no flat head is observed visually. And waste products caused by the oversize of the flat head are avoided.
The second embodiment is as follows: the present embodiment will be described with reference to fig. 5 to 6, and the aperture of the exhaust hole 4 of the present embodiment is not more than 0.2 mm. So set up, because the aperture that this embodiment adopted is not more than 0.2mm, not only can be convenient for the air of incomplete existence in the pit to discharge, when the punching press, still be difficult for forming the space, guarantee the stamping forming quality of rivet cap head, if the aperture is too big, can make rivet cap head easily produce protrudingly. Other components and connections are the same as in the first embodiment.
The third concrete implementation mode: the present embodiment is described with reference to fig. 5 to 6, and the taper angle of the punch 2 of the present embodiment is 35 ° to 45 °. So set up, be convenient for carry out the punching press to the rivet. Other components and connection relationships are the same as those in the second embodiment.
The fourth concrete implementation mode: the present embodiment will be described with reference to fig. 5 to 6, and the taper angle of the press head 2 of the present embodiment is 40 °. So set up, be convenient for carry out the punching press to the rivet. Other compositions and connection relations are the same as those of the third embodiment.
The fifth concrete implementation mode: the present embodiment will be described with reference to fig. 5 to 6, and the end surface of the press bar 1 of the present embodiment is provided with a chamfer. So set up, be convenient for process. Other compositions and connection relationships are the same as those in the first, second, third or fourth embodiment.
The sixth specific implementation mode: the present embodiment is described with reference to fig. 5 to 6, and the center of the dimple 3 of the present embodiment is on the axis of the through hole, and the positional error is not more than Φ 0.05 mm. Other compositions and connection relationships are the same as in the first, second, third, fourth or fifth embodiment.
The working principle of the present invention is explained with reference to fig. 5 to 6:
when the rivet wire punching machine is actually used, the punching rod 1 is connected to a main shaft of the punching machine, the punching head 2 faces downwards, and then rivet wires to be punched are sequentially placed. Carry out the punching press to the rivet silk, during the punching press, because punching press head 2 can produce the air current at the impact in-process, this air current is discharged by the exhaust hole when the recess, can not persist on the rivet silk, and then realizes the punching press of the rivet cap head that does not have the flat head.
Claims (6)
1. The utility model provides a first frock of semicircle head rivet punching press, it includes stamping rod (1) and punching press head (2), and stamping rod (1) is cylindrical stamping rod, and punching press head (2) are frustum shape punching press head, and stamping rod (1) and punching press head (2) coaxial fixed connection, its characterized in that: the small end face center position of the stamping head (2) is provided with a concave groove (3), the stamping rod (1) and the stamping head (2) are provided with exhaust holes (4) along the axis direction, and the exhaust holes (4) are communicated with the concave groove (3).
2. The half-round head rivet stamping head tool according to claim 1, characterized in that: the aperture of the vent hole (4) is not more than 0.2 mm.
3. The half-round head rivet stamping head tool according to claim 2, characterized in that: the cone angle of the punching head (2) is 35-45 degrees.
4. The half-round head rivet stamping head tool according to claim 3, characterized in that: the cone angle of the punch (2) is 40 degrees.
5. The half-round head rivet stamping head tool according to claim 4, characterized in that: the end surface of the stamping rod (1) is provided with a chamfer.
6. The half-round head rivet stamping head tool according to claim 5, characterized in that: the center of the concave groove (3) is on the axis of the through hole, and the position error is not more than phi 0.05 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011473495.1A CN112719077A (en) | 2020-12-15 | 2020-12-15 | Stamping head tool for semi-circular head rivet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011473495.1A CN112719077A (en) | 2020-12-15 | 2020-12-15 | Stamping head tool for semi-circular head rivet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112719077A true CN112719077A (en) | 2021-04-30 |
Family
ID=75602221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011473495.1A Pending CN112719077A (en) | 2020-12-15 | 2020-12-15 | Stamping head tool for semi-circular head rivet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112719077A (en) |
Citations (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4009625A (en) * | 1975-10-24 | 1977-03-01 | Bernal Incorporated | Self-stripping punch with ears |
| GB1476227A (en) * | 1973-12-20 | 1977-06-10 | Warnke Umformtech Veb K | Method of manufacturing a hollow rivet on a can lid |
| WO1981003632A1 (en) * | 1980-06-12 | 1981-12-24 | K Castles | Punch and die assembly |
| SU1412877A1 (en) * | 1986-06-02 | 1988-07-30 | Харьковский авиационный институт им.Н.Е.Жуковского | Holder for single-impact riveting |
| US5015136A (en) * | 1990-07-06 | 1991-05-14 | Truth Incorporated | Rivet joint and method of manufacture |
| JPH04118141A (en) * | 1990-09-07 | 1992-04-20 | Tanaka Kikinzoku Kogyo Kk | Die for working header |
| US5332349A (en) * | 1993-08-19 | 1994-07-26 | Gerwin Jon R | Flush rivet with compound radius domed head |
| US5896772A (en) * | 1998-02-19 | 1999-04-27 | Ube Industries, Ltd. | Extruder |
| EP1229254A2 (en) * | 2001-02-02 | 2002-08-07 | Richard Bergner Verbindungstechnik GmbH & Co KG | Punch riveting and hollow punch rivet |
| CA2739635A1 (en) * | 2001-06-26 | 2003-01-03 | Magna Structural Systems Inc. | Method of forming a rivet using a riveting apparatus |
| JP2004001093A (en) * | 1998-02-06 | 2004-01-08 | Amada Co Ltd | Forming die |
| JP2004074215A (en) * | 2002-08-16 | 2004-03-11 | Metts Corp | Electrode and method for electrically staking |
| US20070204670A1 (en) * | 2006-03-06 | 2007-09-06 | Ping-Sen Chen | Riveting kit for an eyelet |
| CN201900180U (en) * | 2010-10-20 | 2011-07-20 | 北京新立机械有限责任公司 | Special multifunctional punch die for rivet |
| CN202283551U (en) * | 2011-09-29 | 2012-06-27 | 衡阳风顺车桥有限公司 | Cold extruding punch head |
| US20130004263A1 (en) * | 2011-06-29 | 2013-01-03 | United Technologies Corporation | Rivet and rivet removal method thereof |
| CN103008523A (en) * | 2006-06-21 | 2013-04-03 | 休曼吉特·辛格 | Punch rivet and die |
| CN103128224A (en) * | 2011-11-22 | 2013-06-05 | 福特全球技术公司 | Die with multi-sided cavity for self-piercing riveting process |
| JP5283028B1 (en) * | 2012-11-22 | 2013-09-04 | 通 山田 | Metal member joining method and metal member joined body |
| AT513292B1 (en) * | 2012-09-03 | 2015-05-15 | Zizala Lichtsysteme Gmbh | Method for producing a positive connection |
| JP2016175140A (en) * | 2015-03-19 | 2016-10-06 | 幸雄 中原 | Punching shaft, punch, punch blade and package bag |
| CN109311075A (en) * | 2016-06-10 | 2019-02-05 | 罗伯特·博世有限公司 | It fills out and/or the formed punch of riveting set and fills out or the method for riveting workpiece for pressing for pressing |
| US20190078601A1 (en) * | 2016-05-11 | 2019-03-14 | Newfrey Llc | Self-piercing rivet and self-piercing riveted joint |
| CN208643865U (en) * | 2018-08-31 | 2019-03-26 | 贵州航铄工业股份有限公司 | A kind of novel high locked bolts formed punch of exhaust |
| CN109538633A (en) * | 2018-12-21 | 2019-03-29 | 中国航发哈尔滨轴承有限公司 | Deep groove ball bearing and processing method with oilhole ribbon retainer |
| US20190291311A1 (en) * | 2016-07-20 | 2019-09-26 | Sacmi Cooperativa Meccanici Imola Societa' Cooperativa | Punch for compression molds |
| CN111842637A (en) * | 2020-07-03 | 2020-10-30 | 北京航星机器制造有限公司 | Titanium alloy deep cavity component composite forming die and forming method |
-
2020
- 2020-12-15 CN CN202011473495.1A patent/CN112719077A/en active Pending
Patent Citations (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1476227A (en) * | 1973-12-20 | 1977-06-10 | Warnke Umformtech Veb K | Method of manufacturing a hollow rivet on a can lid |
| US4009625A (en) * | 1975-10-24 | 1977-03-01 | Bernal Incorporated | Self-stripping punch with ears |
| WO1981003632A1 (en) * | 1980-06-12 | 1981-12-24 | K Castles | Punch and die assembly |
| SU1412877A1 (en) * | 1986-06-02 | 1988-07-30 | Харьковский авиационный институт им.Н.Е.Жуковского | Holder for single-impact riveting |
| US5015136A (en) * | 1990-07-06 | 1991-05-14 | Truth Incorporated | Rivet joint and method of manufacture |
| JPH04118141A (en) * | 1990-09-07 | 1992-04-20 | Tanaka Kikinzoku Kogyo Kk | Die for working header |
| US5332349A (en) * | 1993-08-19 | 1994-07-26 | Gerwin Jon R | Flush rivet with compound radius domed head |
| JP2004001093A (en) * | 1998-02-06 | 2004-01-08 | Amada Co Ltd | Forming die |
| US5896772A (en) * | 1998-02-19 | 1999-04-27 | Ube Industries, Ltd. | Extruder |
| EP1229254A2 (en) * | 2001-02-02 | 2002-08-07 | Richard Bergner Verbindungstechnik GmbH & Co KG | Punch riveting and hollow punch rivet |
| CA2739635A1 (en) * | 2001-06-26 | 2003-01-03 | Magna Structural Systems Inc. | Method of forming a rivet using a riveting apparatus |
| JP2004074215A (en) * | 2002-08-16 | 2004-03-11 | Metts Corp | Electrode and method for electrically staking |
| US20070204670A1 (en) * | 2006-03-06 | 2007-09-06 | Ping-Sen Chen | Riveting kit for an eyelet |
| CN103008523A (en) * | 2006-06-21 | 2013-04-03 | 休曼吉特·辛格 | Punch rivet and die |
| CN201900180U (en) * | 2010-10-20 | 2011-07-20 | 北京新立机械有限责任公司 | Special multifunctional punch die for rivet |
| US20130004263A1 (en) * | 2011-06-29 | 2013-01-03 | United Technologies Corporation | Rivet and rivet removal method thereof |
| CN202283551U (en) * | 2011-09-29 | 2012-06-27 | 衡阳风顺车桥有限公司 | Cold extruding punch head |
| CN103128224A (en) * | 2011-11-22 | 2013-06-05 | 福特全球技术公司 | Die with multi-sided cavity for self-piercing riveting process |
| AT513292B1 (en) * | 2012-09-03 | 2015-05-15 | Zizala Lichtsysteme Gmbh | Method for producing a positive connection |
| JP5283028B1 (en) * | 2012-11-22 | 2013-09-04 | 通 山田 | Metal member joining method and metal member joined body |
| JP2016175140A (en) * | 2015-03-19 | 2016-10-06 | 幸雄 中原 | Punching shaft, punch, punch blade and package bag |
| US20190078601A1 (en) * | 2016-05-11 | 2019-03-14 | Newfrey Llc | Self-piercing rivet and self-piercing riveted joint |
| CN109311075A (en) * | 2016-06-10 | 2019-02-05 | 罗伯特·博世有限公司 | It fills out and/or the formed punch of riveting set and fills out or the method for riveting workpiece for pressing for pressing |
| US20190291311A1 (en) * | 2016-07-20 | 2019-09-26 | Sacmi Cooperativa Meccanici Imola Societa' Cooperativa | Punch for compression molds |
| CN208643865U (en) * | 2018-08-31 | 2019-03-26 | 贵州航铄工业股份有限公司 | A kind of novel high locked bolts formed punch of exhaust |
| CN109538633A (en) * | 2018-12-21 | 2019-03-29 | 中国航发哈尔滨轴承有限公司 | Deep groove ball bearing and processing method with oilhole ribbon retainer |
| CN111842637A (en) * | 2020-07-03 | 2020-10-30 | 北京航星机器制造有限公司 | Titanium alloy deep cavity component composite forming die and forming method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20210430 |