CN111531045B - Metal piece riveting process - Google Patents
Metal piece riveting process Download PDFInfo
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- CN111531045B CN111531045B CN202010262188.2A CN202010262188A CN111531045B CN 111531045 B CN111531045 B CN 111531045B CN 202010262188 A CN202010262188 A CN 202010262188A CN 111531045 B CN111531045 B CN 111531045B
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- arc
- shaped bulge
- metal piece
- riveting
- shaped
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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
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
Abstract
The invention relates to a metal piece riveting process which comprises a first metal piece 1 and a second metal piece 2 to be riveted, wherein the first metal piece 1 and the second metal piece 2 are firstly punched and torn to form a first arc-shaped bulge and a second arc-shaped bulge, then the second arc-shaped bulge 4 of the second metal piece is assembled in a concave cavity formed by the first arc-shaped bulge, the first arc-shaped bulge of the first metal piece and the second arc-shaped bulge of the second metal piece are riveted and extruded after assembly, and the first metal piece and the second metal piece are riveted together through the first arc-shaped bulge and the second arc-shaped bulge. The invention realizes rivet-free riveting by a novel riveting method, and compared with other existing rivet-free riveting, the riveting structure has enhanced strength.
Description
Technical Field
The invention relates to a riveting process.
Background
In the prior art, the connection between the two metal parts can be realized by screws, welding or riveting. The traditional riveting method is characterized in that rivets are riveted into holes of two metal parts, the riveting cost is high, a lug is forged on one metal part and is riveted into a hole of another metal component, and although the cost of the riveting assembly is reduced by the method, the defect of unstable connection is caused.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a metal riveting process which is stable in connection and does not increase the riveting cost.
The invention is realized by the following technical scheme:
a metal riveting process is characterized in that:
(1) stamping and tearing the first metal piece to form a first arc-shaped bulge;
(2) stamping and tearing the second metal piece to form a second arc-shaped bulge matched with the first arc-shaped bulge;
(3) assembling a second arc-shaped bulge of a second metal piece in a concave cavity formed by the first arc-shaped bulge;
(4) riveting and extruding the first arc-shaped bulge of the assembled first metal piece and the second arc-shaped bulge of the second metal piece;
(5) in the extrusion process, the surface of the second arc-shaped bulge extends into the periphery of the concave cavity formed by the first arc-shaped bulge, and the second arc-shaped bulge is pressed and clamped between the first arc-shaped bulge and the first metal piece;
(6) the first metal piece and the second metal piece are riveted together through the first arc-shaped bulge and the second arc-shaped bulge.
Preferably, in step (3), the first metal part includes a first surface on the same side as the convex side of the first arc-shaped protrusion and a second surface opposite to the first surface, the convex surface of the second arc-shaped protrusion includes a convex surface close to the first arc-shaped protrusion and a concave surface opposite to the convex surface, the vertex of the concave surface is located on the outer side of the first surface, and the distance between the vertex and the first surface is smaller than the thickness of the second metal part.
Preferably, in step (3), the width of the second arc-shaped protrusion is smaller than or equal to the width of the cavity formed by the first arc-shaped protrusion.
Preferably, in step (3), the second arc-shaped protrusion is tightly fitted in the cavity formed by the first arc-shaped protrusion.
Preferably, in the step (4), the upper riveting device is a punch with a common shape, and the bottom riveting device is a rectangular or square riveting tool matched with the arc-shaped protrusion.
Preferably, in the step (6), the vertex position of the concave surface of the second arc-shaped protrusion is located inside the first surface of the first connecting member.
Preferably, in the step (6), after the caulking, the first arc-shaped protrusion and the second arc-shaped protrusion are formed into a trapezoid shape, and a compressive stress is formed between the bottom of the trapezoid shape.
In the riveting process, a novel rivet-free riveting mode is adopted, firstly, a first arc-shaped bulge and a second arc-shaped bulge which are matched with each other are formed by punching and tearing at the riveting position of a first metal piece and a second metal piece respectively, the second arc-shaped bulge is tightly matched in a concave cavity formed by the first arc-shaped bulge, then extrusion riveting is carried out, the first arc-shaped bulge and the second arc-shaped bulge are deformed, particularly the surface of the second arc-shaped bulge extends, part of the second arc-shaped bulge extends to the periphery of the concave cavity, and the second arc-shaped bulge is tightly pressed between the first arc-shaped bulge and the first metal piece, so that riveting of the first metal piece and the second metal piece is realized.
The invention has the beneficial effects that: the invention realizes rivet-free riveting by a novel riveting method, and compared with other existing rivet-free riveting, the riveting structure has enhanced strength.
Drawings
Fig. 1 is a schematic view of the structure of the present invention before riveting.
Fig. 2 is a schematic sectional structure view of fig. 1.
Fig. 3 is a partial structural schematic diagram of fig. 1.
Fig. 4 is a schematic view of the riveted structure of the present invention.
Fig. 5 is a schematic cross-sectional structure of fig. 4.
Fig. 6 is a partial structural schematic view of fig. 4.
Detailed Description
The invention is described in further detail below with reference to the figures and the detailed description.
As shown in fig. 1 to 6, a metal riveting process includes a first metal part 1 and a second metal part 2 to be riveted, and includes the following steps:
(1) stamping and tearing the first metal piece 1 to form a first arc-shaped bulge 3;
(2) the second metal piece 2 is punched and torn to form a second arc-shaped bulge 4 matched with the first arc-shaped bulge;
(3) assembling a second arc-shaped bulge 4 of a second metal piece in a concave cavity formed by the first arc-shaped bulge;
(4) riveting and extruding the first arc-shaped bulge of the assembled first metal piece and the second arc-shaped bulge of the second metal piece;
(5) in the extrusion process, the surface of the second arc-shaped bulge extends into the periphery of the concave cavity formed by the first arc-shaped bulge, and the second arc-shaped bulge is pressed and clamped between the first arc-shaped bulge and the first metal piece;
(6) the first metal piece and the second metal piece are riveted together through the first arc-shaped bulge and the second arc-shaped bulge.
As shown in fig. 1, 2 and 3, in step (3), the first metal part includes a first surface 5 on the same side as the convex side of the first arc-shaped protrusion and a second surface 6 opposite to the first surface, the convex surface of the second arc-shaped protrusion includes a convex surface 7 close to the first arc-shaped protrusion and a concave surface 8 opposite to the convex surface, the vertex position of the concave surface 8 is located on the outer side of the first surface 5, and the distance between the vertex and the first surface is smaller than the thickness of the second metal part.
As shown in fig. 4, 5, and 6, after riveting, the surface of the second arc-shaped protrusion extends, the second arc-shaped protrusion is transformed from fig. 3 to fig. 6, and the second arc-shaped protrusion extends into the periphery of the concave cavity, that is, the second arc-shaped protrusion 4 is clamped between the first arc-shaped protrusion 3 and the first metal part 1. Before riveting, the vertex of the concave surface 8 of the second arc-shaped protrusion is positioned outside the first surface 55 of the first metal part, and the distance between the vertex and the first surface cannot be too large and needs to be smaller than the thickness of the second metal part. After riveting, the apex of the concave surface is located between the first surface and the second surface due to the compression.
Before riveting, the width of the second arc-shaped protrusion 4 is smaller than or equal to the width of the concave cavity formed by the first arc-shaped protrusion, and preferably, the second arc-shaped protrusion is tightly matched with the concave cavity formed by the first arc-shaped protrusion.
In the step (4), the upper riveting device is a punch with a common shape, and the bottom riveting device is a cuboid or square riveting tool matched with the arc-shaped bulge.
In the step (6), the vertex position of the concave surface 8 of the second arc-shaped protrusion is located inside the first surface of the first connecting member. As shown in fig. 4, after riveting, the first arc-shaped protrusion and the second arc-shaped protrusion are trapezoidal, and extrusion stress is formed at the bottom of the trapezoid.
In the riveting process, a novel rivet-free riveting mode is adopted, firstly, a first arc-shaped bulge 3 and a second arc-shaped bulge 4 which are matched with each other are formed by punching and tearing at the riveting position of a first metal piece 1 and a second metal piece 2 respectively, the second arc-shaped bulge is tightly matched in a concave cavity formed by the first arc-shaped bulge, then extrusion riveting is carried out, the first arc-shaped bulge and the second arc-shaped bulge are deformed, particularly the surface of the second arc-shaped bulge 4 extends, part of the second arc-shaped bulge extends to the periphery of the concave cavity, and the second arc-shaped bulge is tightly pressed between the first arc-shaped bulge and the first metal piece, so that riveting of the first metal piece and the second metal piece is realized.
Compared with riveting with a rivet, the method of the invention can not only save partial cost of the rivet and production process cost, but also meet the temperature rise detection of conductive parts due to larger contact surface of the riveting part when applied to conductive parts.
During riveting, the upper riveting device can adopt a punch head in a common shape, and the bottom riveting device adopts a cuboid or square riveting tool matched with the arc-shaped bulge.
Through the riveting extrusion, first arc arch 3 all takes place deformation with second arc arch 4, and first arc arch, second arc arch are all flattened by the part, and the second arc arch extends through the extrusion and is in the same place with the protruding riveting of first arc. After riveting, the vertex position of the concave surface 8 of the second arc-shaped protrusion is located on the inner side of the first surface of the first connecting piece. After the second arc-shaped bulge extends, the width of the second arc-shaped bulge is larger than that of the concave cavity. After riveting, the first arc-shaped bulge and the second arc-shaped bulge are trapezoidal, and extrusion stress is formed at the bottom of the trapezoid.
The invention realizes rivet-free riveting by a novel riveting method, and compared with other existing rivet-free riveting, the riveting structure has enhanced strength.
Claims (7)
1. A metal piece riveting process is characterized by comprising the following steps:
(1) stamping and tearing the first metal piece to form a first arc-shaped bulge;
(2) stamping and tearing the second metal piece to form a second arc-shaped bulge matched with the first arc-shaped bulge;
(3) assembling a second arc-shaped bulge of a second metal piece in a concave cavity formed by the first arc-shaped bulge;
(4) riveting and extruding the first arc-shaped bulge of the assembled first metal piece and the second arc-shaped bulge of the second metal piece;
(5) in the extrusion process, the surface of the second arc-shaped bulge extends into the periphery of the concave cavity formed by the first arc-shaped bulge, and the second arc-shaped bulge is pressed and clamped between the first arc-shaped bulge and the first metal piece;
(6) the first metal piece and the second metal piece are riveted together through the first arc-shaped bulge and the second arc-shaped bulge.
2. A metal part riveting process according to claim 1, wherein: in step (3), the first metal piece includes a first surface on the same side as the protruding side of the first arc-shaped protrusion and a second surface opposite to the first surface, the protruding surface of the second arc-shaped protrusion includes a protruding surface close to the first arc-shaped protrusion and a concave surface opposite to the protruding surface, the vertex position of the concave surface is located on the outer side of the first surface, and the distance between the vertex and the first surface is smaller than the thickness of the second metal piece.
3. A metal part riveting process according to claim 1, wherein: in the step (3), the width of the second arc-shaped bulge is smaller than or equal to the width of the concave cavity formed by the first arc-shaped bulge.
4. A metal part riveting process according to claim 3, wherein: in the step (3), the second arc-shaped bulge is tightly matched in the concave cavity formed by the first arc-shaped bulge.
5. A metal part riveting process according to claim 1, wherein: in the step (4), the upper riveting device is a punch with a common shape, and the bottom riveting device is a cuboid or square riveting tool matched with the arc-shaped bulge.
6. A metal part riveting process according to claim 1, wherein: in the step (6), after riveting, the vertex position of the concave surface of the second arc-shaped protrusion is located on the inner side of the first surface of the first connecting piece.
7. A metal part riveting process according to claim 1, wherein: in the step (6), after riveting, the first arc-shaped protrusion and the second arc-shaped protrusion are trapezoidal, and extrusion stress is formed at the bottom of the trapezoid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010262188.2A CN111531045B (en) | 2020-04-06 | 2020-04-06 | Metal piece riveting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010262188.2A CN111531045B (en) | 2020-04-06 | 2020-04-06 | Metal piece riveting process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111531045A CN111531045A (en) | 2020-08-14 |
| CN111531045B true CN111531045B (en) | 2022-03-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010262188.2A Active CN111531045B (en) | 2020-04-06 | 2020-04-06 | Metal piece riveting process |
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| CN (1) | CN111531045B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3579809A (en) * | 1968-12-13 | 1971-05-25 | Frantz Mfg Co | Method of joining sheets of rigid deformable material |
| US5177861A (en) * | 1980-09-08 | 1993-01-12 | Btm Corporation | Apparatus for joining sheet material |
| SE9301097D0 (en) * | 1993-03-31 | 1993-03-31 | Attexor Equipements Sa | A METHOD FOR JOINING TOGETHER TWO OR SEVERAL OVERLAYING SHEET FORMED MEMBERS, AN APPARATUS FOR CARRYING OUT SAID METHOD AND A JOINT RESULTING FROM SAID METHOD |
| ZA200904683B (en) * | 2007-02-13 | 2010-09-29 | Inventio Ag | Method and tool for clinching thich sheet metal, and use of the tool |
| CN110899498A (en) * | 2019-11-20 | 2020-03-24 | 四川大学 | Movable reverse rivetless riveting die |
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2020
- 2020-04-06 CN CN202010262188.2A patent/CN111531045B/en active Active
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| Publication number | Publication date |
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| CN111531045A (en) | 2020-08-14 |
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