CN210817243U - Combined die for processing self-plugging rivet - Google Patents
Combined die for processing self-plugging rivet Download PDFInfo
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- CN210817243U CN210817243U CN202020341807.2U CN202020341807U CN210817243U CN 210817243 U CN210817243 U CN 210817243U CN 202020341807 U CN202020341807 U CN 202020341807U CN 210817243 U CN210817243 U CN 210817243U
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- ejector rod
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Abstract
The utility model discloses a combined die for processing self-plugging rivets, which comprises a main die, a mandril, a knockout rod shell and a knockout rod die core; a cavity is arranged in the main die, a channel for leading the ejector rod to the cavity is arranged in the main die, the channel and the ejector rod are in clearance fit, and the channel is communicated with the cavity and coaxially arranged; a through hole is formed in the shell of the knockout rod along the axial direction of the shell, the through hole is in clearance fit with the ejector rod, and the front end part of the shell of the knockout rod is clamped with the rear end part of the main die; the knockout pin mold core is in clearance fit with the through hole; the knockout pin mold core front section stretches into the through hole, the ejector rod rear section stretches into the through hole, the ejector rod front section stretches into the channel and the cavity, and the knockout pin mold core front end portion is abutted against the ejector rod rear end portion. The utility model relates to a combined die is used in self-plugging rivet processing is applicable to the double-strike cold heading machine, and this suit compound die simple structure easily manufacturing can be used to batch processing, the big core bar of draw ratio, and is not fragile, is favorable to improve equipment utilization to machining efficiency.
Description
Technical Field
The utility model relates to a parts machining technical field especially relates to a combined die is used in self-plugging rivet processing.
Background
Compared with common rivets, the self-plugging rivet type rivets have the advantages of simple installation, small installation space, single-side riveting and the like, so the self-plugging rivet type rivets are used in large quantities in the aerospace field. At present, blind rivets used in China at present mainly depend on import. Therefore, the development of the blind rivet plays an important role in guaranteeing national defense type scientific research and production and civil aviation requirements and breaking the situation of foreign monopoly of related products.
The blind rivet comprises a core rod and a rivet body, as shown in figure 1, wherein the core rod is a part with large length-diameter ratio, and the processing difficulty is large. In the traditional processing and manufacturing process, the equipment model of the cold header is increased, the length of a main mold cavity is increased, and the stroke length of the ejector rod in the main mold is increased, so that the service life of the ejector rod is prolonged, but the equipment cost and the mold cost are greatly increased, and the service life of the ejector rod is improved but not completely solved.
Disclosure of Invention
An object of the utility model is just to provide a simple structure, low in manufacturing cost and durable assembling die for blind rivet processing in order to solve above-mentioned problem.
In order to achieve the purpose, the disclosure provides a combined die for machining blind rivets, which comprises a main die, an ejector rod, a knockout rod shell and a knockout rod die core;
a cavity is arranged in the main die, a channel for leading the ejector rod to the cavity is arranged in the main die, the channel and the ejector rod are in clearance fit, and the channel is communicated with the cavity and coaxially arranged;
a through hole is formed in the shell of the knockout rod along the axial direction of the shell, the through hole is in clearance fit with the ejector rod, and the front end part of the shell of the knockout rod is clamped with the rear end part of the main die;
the knockout pin mold core is in clearance fit with the through hole;
the knockout pin mold core front section stretches into the through hole, the ejector rod rear section stretches into the through hole, the ejector rod front section stretches into the channel and the cavity, and the knockout pin mold core front end portion is abutted against the ejector rod rear end portion.
The beneficial effects of the utility model reside in that:
the utility model relates to a combined die is used in self-plugging rivet processing is applicable to the double-strike cold heading machine, and this suit compound die simple structure easily manufacturing can be used to batch processing, the big core bar of draw ratio, and is not fragile, is favorable to improve equipment utilization to improve machining efficiency.
On the basis of the technical scheme, the utility model discloses can also do as follows the improvement:
optionally, the cross section of the through hole is formed into a fan-shaped structure which diverges outwards from the center of the through hole, the outer circle of the ejector rod is in clearance fit with the center part of the fan-shaped structure, and the outer circle of the knockout pin mold core is in clearance fit with the fan-shaped structure.
Optionally, a limiting block is fixed at the rear end of the ejector rod, the limiting block is in clearance fit with the fan-shaped structure, and the front end of the knockout rod mold core abuts against the limiting block.
Optionally, a stop block is fixed at the rear end of the knockout pin mold core, and the cross sectional area of the stop block is larger than that of the knockout pin mold core.
Optionally, a groove extending forwards is formed in the rear end of the main mold, and the front end of the knockout pin shell is clamped into the groove.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a schematic view of the construction of a blind rivet;
FIG. 2 is a schematic structural view of the combined die for blind rivet processing according to the present invention;
fig. 3 is a schematic structural diagram of the main mold according to the present invention;
fig. 4 is a schematic structural diagram of the ejector rod of the present invention, wherein a is a sectional view of the stopper, and B is a front view of the ejector rod;
fig. 5 is a schematic structural view of the knockout pin housing of the present invention, wherein a is a sectional view of the knockout pin housing, and B is a front view of the knockout pin housing;
fig. 6 is a schematic structural diagram of the knockout pin mold core of the present invention, wherein a is a side view of the knockout pin mold core, and B is a front view of the knockout pin housing.
Description of the reference numerals
The method comprises the following steps of 1-material-beating rod mold core, 2-material-beating rod shell, 3-ejector rod, 4-main mold, 5-part, 6-through hole, 7-groove, 8-channel, 9-cavity, 10-limiting block, 11-center part and 12-stop block.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the present disclosure, unless otherwise specified, the terms of orientation such as "upper" and "lower" are generally defined based on the orientation or positional relationship shown in the drawings, and specifically refer to the direction of the drawing shown in fig. 1 in combination with the positional relationship of the corresponding parts in other drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated.
As shown in fig. 2, the combined die for blind rivet processing of the present invention comprises a main die 4, a top rod 3, a knockout pin housing 2 and a knockout pin die core 1;
as shown in fig. 3, a cavity 9 is arranged in the main mold 4, a channel 8 for leading the ejector rod 3 to the cavity 9 is arranged in the main mold 4, the channel 8 and the ejector rod 3 realize clearance fit, and the channel 8 is communicated with the cavity 9 and coaxially arranged;
the knockout pin shell 2 is provided with a through hole 6 along the axial direction, the through hole 6 is in clearance fit with the ejector rod 3, and the front end part of the knockout pin shell 2 is clamped with the rear end part of the main die 4;
the knockout pin mold core 1 is in clearance fit with the through hole 6;
the front section of the knockout pin mold core 1 extends into the through hole 6, the rear section of the ejector rod 3 extends into the through hole 6, the front section of the ejector rod 3 extends into the channel 8, and the front end part of the knockout pin mold core 1 abuts against the rear end part of the ejector rod 3.
The utility model relates to a combined die is used in self-plugging rivet processing is applicable to the double-strike cold heading machine, and this suit compound die simple structure easily manufacturing can be used to batch processing, the big core bar of draw ratio, and is not fragile, is favorable to improve equipment utilization to machining efficiency.
Alternatively, as shown in fig. 4, 5 and 6, the cross section of the through hole 6 is formed into a fan-shaped structure which diverges outwards from the center thereof, the outer circle of the ejector rod 3 is in clearance fit with the center part 11 of the fan-shaped structure, and the outer circle of the knockout pin mold core 1 is in clearance fit with the fan-shaped structure.
The fan-shaped structure of the through hole 6 can meet the requirements that the ejector rod is fixed in the knockout pin shell 2 and the knockout pin mold core 1 cannot rotate in the through hole 6, so that the knockout pin mold core 1 can transmit force to the ejector rod 3.
Optionally, the rear end of the ejector rod 3 is fixed with a limiting block 10, the limiting block 10 is in clearance fit with the fan-shaped structure, and the front end of the knockout rod mold core 1 abuts against the limiting block 10.
The limiting block 10 limits the ejector rod 3 to rotate in the through hole 6, and prevents the ejector rod 3 from being separated from the main die 4.
Optionally, a stopper 12 is fixed at the rear end of the knockout pin mold core 1, and the cross-sectional area of the stopper 12 is larger than that of the knockout pin mold core 1.
Optionally, the rear end of the main mold 4 is provided with a groove 7 extending forward, and the front end of the knockout pin housing 2 is snapped into the groove 7.
The utility model relates to a combined die theory of operation is as follows for self-plugging rivet processing:
firstly, the blank enters a cavity 9 of a main die 4, and the ejector rod 3 is pushed to move backwards along the channel 8 and the through hole 6; after the part 5 is formed, the knockout pin mold core 1 pushes the knockout pin 3 to move forwards along the channel 8 and the through hole 6, and the knockout pin 3 finally ejects the part 5.
The forming process of the part 5 has the advantages that: in the whole forming process, the ejector rod 3 moves in the main die 4 and the knockout pin shell 2 which are in clearance fit and small, and the ejector rod 3 is stressed uniformly and is not easy to damage.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (5)
1. The combined die for processing the blind rivet is characterized by comprising a main die, an ejector rod, a knockout rod shell and a knockout rod die core;
a cavity is arranged in the main die, a channel for leading the ejector rod to the cavity is arranged in the main die, the channel and the ejector rod are in clearance fit, and the channel is communicated with the cavity and coaxially arranged;
a through hole is formed in the shell of the knockout rod along the axial direction of the shell, the through hole is in clearance fit with the ejector rod, and the front end part of the shell of the knockout rod is clamped with the rear end part of the main die;
the knockout pin mold core is in clearance fit with the through hole;
the knockout pin mold core front section stretches into the through hole, the ejector rod rear section stretches into the through hole, the ejector rod front section stretches into the channel and the cavity, and the knockout pin mold core front end portion is abutted against the ejector rod rear end portion.
2. The assembling die for blind rivet processing according to claim 1, characterized in that: the cross section of the through hole is formed into a fan-shaped structure which is outwards dispersed from the center of the through hole, the excircle of the ejector rod is in clearance fit with the central part of the fan-shaped structure, and the excircle of the knockout pin mold core is in clearance fit with the fan-shaped structure.
3. The assembling die for blind rivet processing according to claim 2, characterized in that: a limiting block is fixed at the rear end part of the ejector rod, the limiting block is in clearance fit with the fan-shaped structure, and the front end part of the knockout pin mold core abuts against the limiting block.
4. The assembling die for blind rivet processing according to claim 2, characterized in that: the rear end part of the knockout pin mold core is fixed with a stop block, and the cross section area of the stop block is larger than that of the knockout pin mold core.
5. The assembling die for blind rivet processing according to claim 1, characterized in that: the rear end part of the main die is provided with a groove extending forwards, and the front end part of the shell of the knockout pin is clamped in the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020341807.2U CN210817243U (en) | 2020-03-18 | 2020-03-18 | Combined die for processing self-plugging rivet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020341807.2U CN210817243U (en) | 2020-03-18 | 2020-03-18 | Combined die for processing self-plugging rivet |
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| CN210817243U true CN210817243U (en) | 2020-06-23 |
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| CN202020341807.2U Active CN210817243U (en) | 2020-03-18 | 2020-03-18 | Combined die for processing self-plugging rivet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111843392A (en) * | 2020-07-30 | 2020-10-30 | 贵州精立航太科技有限公司 | Machining process of core rod of self-plugging rivet |
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2020
- 2020-03-18 CN CN202020341807.2U patent/CN210817243U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111843392A (en) * | 2020-07-30 | 2020-10-30 | 贵州精立航太科技有限公司 | Machining process of core rod of self-plugging rivet |
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