CN222885784U - A riveting device for controlling riveting deformation of aluminum alloy structural parts at multiple levels - Google Patents

Abstract

Compared with the conventional riveting process, the synchronous pre-pressing mechanism is arranged in the riveting process, the pressing mechanism adopts a two-stage pressing mode, the local and cumulative plastic deformation of the aluminum alloy structural member is respectively controlled, the integral riveting deformation of the structural member is effectively restrained, equipment automatically returns to the initial position after riveting, and the whole process is simple, continuous and stable.

Description

Multi-stage control riveting deformation pressing and riveting device for aluminum alloy structural part

Technical Field

The utility model relates to the technical field of riveting, in particular to a press riveting device for multi-stage control riveting deformation of an aluminum alloy structural member.

Background

Because the aluminum alloy material has the advantages of high specific strength, low density, large weight reduction potential and the like, the aluminum alloy material is widely applied to the light-weight field of new energy electric automobiles at present, such as battery shells, automobile bodies, automobile chassis, hubs, anti-collision beams and other automobile components. In the automobile manufacturing industry, the press riveting connection technology effectively improves the strength, the rigidity and the production efficiency of a riveting point by rapidly generating plastic deformation between connecting pieces, and is particularly suitable for aluminum alloy materials with excellent plasticity. Therefore, the press riveting technology is always favored in the field of new energy electric automobiles. However, because the strength and rigidity of the aluminum alloy are low, local plastic deformation is easy to generate in the conventional press riveting process, and the adopted rivet head and rivet die are limited by the structure and volume of the product, the effect of inhibiting the riveting deformation is difficult to realize by simply optimizing the structure. For the automobile structural part, the press riveting connection requirement is thousands, and the local plastic deformation is easy to form an accumulated plastic deformation effect in a specific direction under the limitation of multiple processing conditions, so that on one hand, the integral deformation of the product is easy to cause, on the other hand, the residual larger stress of the structural part is easy to cause, and the risk of product failure is greatly increased. Therefore, it is necessary to develop a device for controlling the press riveting deformation of the aluminum alloy structural member for the new energy automobile, so as to improve the processing precision of the product.

Disclosure of utility model

The utility model aims to provide a press riveting device for controlling riveting deformation of an aluminum alloy structural member in multiple stages, which is used for controlling local and cumulative plastic deformation of the aluminum alloy structural member for a new energy automobile and effectively inhibiting the whole press riveting deformation of the structural member.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

A press riveting device for multi-stage control riveting deformation of an aluminum alloy structural member comprises a primary pre-compression module, a secondary rivet press forming module and a bottom frame; the first-stage pre-compression module comprises a lower die fixing plate, guide post springs, guide posts, an upper die fixing plate, linear bearings, limiting blocks, lower sizing dies and a pressing block module, wherein the lower die fixing plate is arranged on the supporting plate, the lower sizing dies are arranged on the lower die fixing plate, the guide posts are symmetrically arranged in two, the lower ends of the guide posts are fixed on the lower die fixing plate through threads, limiting blocks are arranged at the upper ends of the guide posts, the linear bearings are arranged on the upper die fixing plate, the upper die fixing plate and the guide posts can relatively slide up and down through the linear bearings, the guide post springs are sleeved on the guide posts, the upper ends of the guide post springs are propped against the lower plane of the upper die fixing plate and limited through the limiting blocks, the pressing block module is provided with two pressing block modules, the two pressing block modules are all arranged on the upper die fixing plate, the second-stage pressing module comprises a hollow sleeve, a pressing sleeve pre-compression spring, a pressing sleeve and a pressing head, the upper part of the pressing head is symmetrically arranged in an inner cavity of the hollow sleeve, the upper end of the pressing head is propped against the top end of the inner cavity, the upper end of the inner cavity is fixed through the linear bearings, the upper die fixing plate can be fixed with the upper die fixing sleeve through the upper step and the upper die fixing sleeve through the upper step, and the upper step pressing sleeve can be fixed in the hole through the upper die fixing sleeve through the upper step, and the upper step fixing sleeve through the pressing sleeve.

The press riveting device for the aluminum alloy structural member multistage control riveting deformation comprises four support columns, press briquetting springs and press briquetting bodies, wherein the four support columns are fastened on an upper die fixing plate through threads, the press briquetting bodies are rectangular, circular grooves are formed in the upper surface and the lower surface of each press briquetting body, the lower ends of the support columns sink into the lower grooves and are positioned through steps at the lower ends of the support columns, the press briquetting bodies can move up and down along the support columns, the lower ends of the press briquetting springs sink into the upper grooves of the press briquetting bodies, and the upper ends of the press briquetting springs tightly prop against the top ends of the upper inner cavities of the upper die fixing plate.

The multi-stage riveting deformation control riveting device for the aluminum alloy structural member has the advantages that the elastic coefficients of the guide post spring, the pressing sleeve pre-tightening spring and the pressing block spring are different, and the guide post spring, the pressing sleeve pre-tightening spring and the pressing block spring are rectangular springs.

The utility model has the following advantages:

Compared with the conventional riveting process, the synchronous pre-pressing mechanism is arranged in the riveting process, the two-stage pressing mode is adopted by the pressing mechanism, the local and accumulated plastic deformation of the aluminum alloy structural member is respectively controlled by the pressing mechanism, the integral riveting deformation of the structural member is effectively restrained, the equipment automatically returns to the initial position after riveting, and the whole process is simple, continuous and stable.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

fig. 2 is a schematic perspective view of an upper die fixing plate according to the present utility model;

FIG. 3 is a front view, partially in section, of the present utility model;

The reference numerals in the figure respectively show 111, a lower die fixing plate, 112, a guide post spring, 113, a guide post, 114, an upper die fixing plate, 115, a linear bearing, 116, a limiting block, 117, an aluminum alloy structural member, 118, a lower sizing die, 119, a briquetting module, 211, a hollow sleeve, 212, a briquetting sleeve pre-tightening spring, 213, a briquetting sleeve, 214, a rivet, 215, a fixing bolt, 31, a base, 32, a supporting plate, 120, a supporting post, 121, a briquetting spring, 122 and a briquetting body.

Detailed Description

The utility model is further described below with reference to the drawings and examples.

The utility model relates to a press riveting device for multi-stage control riveting deformation of an aluminum alloy structural member, which comprises a primary pre-pressing module, a secondary rivet pressing module and a bottom frame. The primary pre-compression module is mounted on the hydraulic riveting equipment workbench through a symmetrical support plate 32, and the secondary rivet head press module is mounted on the primary pre-compression module.

According to the riveting device for the aluminum alloy structural member multistage control riveting deformation, a group of symmetrical spring guide modules are arranged on a primary pre-compression module, wherein two guide posts 113 respectively penetrate through a flanged linear bearing 115, an upper die fixing plate 114 and a rectangular spring 112, and the lower end of the guide posts is fixed on a lower die fixing plate 111. The upper die fixing plate 114 and the lower die fixing plate 111 are respectively provided with a pressing block module 119 and a lower sizing die (118) for pre-pressing the flange edges of the aluminum alloy structural members 117, and the central lines of the two pressing block bodies 122 are positioned on the same plane and symmetrically distributed along the length direction of the upper die fixing plate 114. The secondary rivet press die set is provided with a set of spring linkage arrangements in which stepped cylindrical rivets 214 pass through a bottom press sleeve 213 and a press sleeve pretension spring 212, respectively, and are connected to the hollow sleeve 211 by a set bolt 215.

The press riveting device for multistage control of riveting deformation of an aluminum alloy structural member comprises four support columns 120, press briquetting springs 121 and press briquetting bodies 122, wherein the four support columns 120 are fastened on an upper die fixing plate 114 through threads, the press briquetting bodies 122 are in cuboid shapes, round grooves are formed in the upper surface and the lower surface of each press briquetting body, the lower ends of the support columns 120 sink into the lower grooves, the press briquetting bodies 122 can move up and down along the support columns 120 through steps at the lower ends of the support columns 120, the lower ends of the press briquetting springs 121 sink into the upper grooves of the press briquetting bodies 122, and the upper ends of the press briquetting bodies tightly press the top ends of inner cavities on the upper die fixing plate 114.

The utility model relates to a riveting device for multi-stage control of riveting deformation of an aluminum alloy structural member, which has the working principle that a hollow sleeve 211 is driven by a movable end of a riveting device to move downwards, so that an upper die fixing plate 114 is driven to move downwards along guide shafts 113 on two sides, and the movement speed is controllable under the resistance action of guide column springs 112 on the periphery of a linear bearing 115. With the downward movement of the upper die fixing plate 114, the bottom of the press block body 122 is firstly contacted with the flange edge of the aluminum alloy structural member 117 placed on the lower sizing die 118, at this time, the press block spring 121 generates a pressing force, the pressing force is transmitted to the flange edge of the aluminum alloy structural member 117 through the lower sizing die 118, when the press block spring 121 is compressed to a preset compression amount, the preset pressing force is reached, different pre-pressing forces can be obtained by adjusting the press block spring 121, and thus, the flange edge of the aluminum alloy structural member 117 is effectively pressed, the pre-pressing force is adjustable, and the primary pre-pressing process is realized.

After the primary pre-compaction process is completed, the riveting device provides a larger downward pressure, and continuously drives the hollow sleeve 211 to move downwards, so that the briquetting spring 121 is further contracted, and the secondary rivet head pressing module is driven to continuously move downwards until the pressing sleeve 213 is in contact with the upper surface of the aluminum alloy structural part 117. Subsequently, the press sleeve pretension spring 212 connected to the press sleeve 213 starts to contract, causing the press sleeve 213 to gradually press the upper surface area of the aluminum alloy structural member 117, achieving a secondary compression of the local area around the press rivet.

The primary pre-compression module and the secondary rivet head module continuously press downwards to drive the rivet head 214 to press downwards and press the press rivet nut, after the hydraulic cylinder of the press rivet device reaches a set pressure value, the moving end of the press rivet device is lifted upwards slowly, then the secondary rivet head module and the primary pre-compression module are relieved in sequence, the press sleeve pre-compression spring 212 and the press block spring 121 rebound to drive the press sleeve 213 and the press block body 122 to return to the initial positions. The upper die fixing plate 114 rises to the initial position with the rebound of the guide post spring 112.

Under the drive of the press riveting equipment, the continuous actions of the pre-compression of the primary press forming die, the compression of the secondary riveting head, the press riveting and the recovery process are successfully realized through the setting of springs with different spring constants, and the plastic deformation generated in the press riveting process is effectively controlled.

And (3) switching the press riveting position of the aluminum alloy structural member 117, and repeating the steps to finally realize effective control of the integral plastic deformation of the aluminum alloy structural member.

Claims (3)

1. A riveting device for multistage control of riveting deformation of an aluminum alloy structural part is characterized by comprising a primary pre-compression module, a secondary riveting head shape pressing module and a bottom frame, wherein the primary pre-compression module is arranged on the bottom frame, the bottom frame consists of a base (31) and a supporting plate (32), the primary pre-compression module comprises a lower die fixing plate (111), a guide post spring (112), a guide post (113), an upper die fixing plate (114), a linear bearing (115), a limiting block (116), a lower sizing die (118) and a pressing block module (119), the lower die fixing plate (111) is arranged on the supporting plate (32), the lower sizing die (118) is arranged on the lower die fixing plate (111), two guide posts (113) are symmetrically arranged, the lower ends of the guide posts (113) are fixed on the lower die fixing plate (111) through threads, limiting blocks (116) are arranged at the upper ends of the guide posts (113), the upper die fixing plate (114) and the guide posts (113) can slide relatively upwards and downwards through the linear bearing (115), the guide posts (113) are sleeved with the limiting blocks (112), and the two guide posts (112) are fixed on the upper die fixing plate (114) through the upper die fixing plate (111) through threads, the limiting blocks (114) are arranged on the upper die fixing plate (114), and the guide posts (113) can slide relatively The die comprises a die-pressing sleeve pre-tightening spring (212), a die-pressing sleeve (213) and a rivet (214), wherein the upper part of the rivet (214) penetrates into an inner cavity of the hollow sleeve (211), the upper end of the rivet is propped against the top end of the inner cavity and is fixed by using a fixing bolt (215), the die-pressing sleeve (213) is hooked with a step on the rivet (214) through the step, is arranged in a hole on an upper die fixing plate (114) and can move up and down in the hole, and the die-pressing sleeve pre-tightening spring (212) is arranged above the die-pressing sleeve (213).

2. The press riveting device for multistage control of riveting deformation of an aluminum alloy structural member according to claim 1, wherein the press riveting module (119) comprises four support columns (120), press briquetting springs (121) and press briquetting bodies (122), the support columns (120) are fastened on an upper die fixing plate (114) through threads, the press briquetting bodies (122) are rectangular, circular grooves are formed in the upper surface and the lower surface, the lower ends of the support columns (120) are sunk into the lower grooves, positioning is conducted through steps at the lower ends of the support columns (120), the press briquetting bodies (122) can move up and down along the support columns (120), the lower ends of the press briquetting springs (121) are sunk into the upper grooves of the press briquetting bodies (122), and the upper ends of the press briquetting springs are tightly propped against the top ends of inner cavities on the upper die fixing plate (114).

3. The multi-stage riveting deformation control riveting device for aluminum alloy structural members according to claim 1, wherein the guide post springs (112), the pressing sleeve pre-tightening springs (212) and the pressing block springs (121) are rectangular springs with different elastic coefficients.