CN105414364A - Method for connecting thin metal plate with thick metal plate through punching compound die - Google Patents

Abstract

The invention relates to a connecting method for a thin metal plate and a thick metal plate, in particular to a method for connecting the thin metal plate with the thick metal plate through a punching compound die. The method includes the steps that firstly, a cylindrical outer-layer male die body and a cylindrical inner-layer male die body with a shoulder are combined into the punching compound die, the punching compound die is installed on a punching machine, multiple through holes with the large diameter are punched in the thin metal plate through the outer-layer male die body, then the thick metal plate is placed on the thin metal plate, the inner-layer male die body descends, and multiple through holes with the small diameter are punched in the thick metal plate, wherein the axes of the through holes in the thick metal plate and the through holes in the thin metal plate coincide with each other, and the number of the through holes in the thick metal plate and the number of the through holes in the thin metal plate are equal; the inner-layer male die body descends continuously, the edges of the through holes in the thick metal plate are extruded through the shoulder so as to be deformed to form hollow protruding parts, and the protruding parts penetrate the through holes in the thin metal plate and extend outwards by small sections; and the protruding parts are upset and flattened through an upsetting machine to form connecting joints, the connecting joints are tightly attached to the outer surface of the thin metal plate, and therefore the thick metal plate and the thin metal plate are firmly connected together.

Description

A kind of method utilizing punching hole composite die connection metal thin plate and slab

Technical field

What the present invention relates to is the method for attachment of a kind of sheet metal and slab, a kind of specifically method utilizing punching hole composite die connection metal thin plate and slab.

Background technology

The syndeton of metal foil slab is widely used in the manufacture fields such as railway transportation, Marine engineering, Aero-Space, auto industry, household electrical appliances.Metal foil slab connects often takes welding method, but sheet metal is compared with metal thick plate, and self constraint (restraint) degree is less, and during welding, distortion is comparatively large, and particularly larger to some thermal coefficient of expansions such as stainless steels material, is out of shape particularly serious.Distortion can have a strong impact on the structural strength of thin and thick plate structure, the accuracy of manufacture and serviceability.

Metal foil slab is connected, usually Mulit-point Connection guarantee bonding strength is needed, if employing spot welding method, consider that the thickness of actual sheet material exists fluctuation, difference position adopts same welding method parameter, and bonding strength must be caused to decline, as difference position method of adjustment parameter ensures weld strength, then can increase considerably the difficulty of automatic welding, production efficiency reduces.

Summary of the invention

The present invention is directed to prior art above shortcomings, propose a kind of method utilizing punching hole composite die connection metal thin plate and slab, the stress that spot welding can be avoided to cause is concentrated, and ensures bonding strength.

The present invention relates to a kind of method utilizing punching hole composite die connection metal thin plate and slab, realized by following steps:

The first step, first the cylindric internal layer punch set of the outer punch of a cylindrical shape and a band shoulder is synthesized a punching hole composite die, described internal layer punch periphery and described outer punch inner headed face are slidably matched, and are arranged on stamping machine by this punching hole composite die;

Second step, is placed on sheet metal on described stamping machine, and the drift of described stamping machine orders about described outer punch and declines, and described sheet metal goes out the larger through hole of multiple diameter according to proportional spacing, and then described drift drives outer punch to rise;

3rd step, metal thick plate is placed on described sheet metal, the two is made to need partly overlapping of connection, the drift of described stamping machine orders about described internal layer punch and declines, described slab is gone out the less through hole of multiple diameter, the dead in line of described slab through hole and described thin plate through hole and quantity is equal;

4th step, described internal layer punch continues to decline, and makes it be deformed into a hollow jut at the edge of described metal thick plate through hole by shoulder part by extruding, and this jut passes described thin plate through hole and extends outward a bit of;

5th step, described metal thick plate, sheet metal entirety are transported on upsetting machine, the thick punch of pier of described upsetting machine presses down, the part upsetting flat exposed by described jut becomes connected node, make it be close to the outer surface of described sheet metal, thus described metal thick plate, sheet metal are linked together securely.

Beneficial effect: the inventive method is more solid and reliable than welding method, this syndeton can complete once with equipment, especially the punching hole composite die completing this syndeton is very simple, can on a pressing equipment once property all tie points of metal thick plate, sheet metal have all been manufactured; Production and processing is convenient and swift, compared with prior art significantly improves production efficiency.

Accompanying drawing explanation

The invention will be further described in conjunction with the embodiments with reference to the accompanying drawings.

Fig. 1 is thin plate punching operation;

Fig. 2 is thick sheet piercing operation;

Fig. 3 is the extrusion process of slab through hole;

Fig. 4 is the state diagram after extrusion process completes;

Fig. 5 is connected node pier unskilled workman sequence;

The enlarged drawing of A point in Fig. 6 Fig. 5.

In figure: 1, punching hole composite die, 2, die, 3, the thick punch of pier, the thick die of 4 pier.

Detailed description of the invention

In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.

In describing the invention, it will be appreciated that, term " longitudinal direction ", " transverse direction ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.

The inventive method is applicable to the connection of steel thin and thick plate, irony thin and thick plate, hard copper alloy sheets and hard aluminium alloy plate.

The first step, see Fig. 1, as shown in the figure, first the cylindric internal layer punch set of the outer punch of a cylindrical shape and a band shoulder is synthesized a punching hole composite die 1, internal layer punch periphery and outer punch inner headed face are slidably matched, and are arranged on the drift of stamping machine by this punching hole composite die;

Second step, adopts 45# steel annealed state plate, wherein plank thickness 1.5mm, lamella thickness 0.5mm.First be placed on by thin plate on the die 2 of stamping machine, the drift of stamping machine orders about outer punch and declines, and thin plate is gone out according to proportional spacing the through hole of multiple diameter 1.5mm, and then drift drives outer punch to rise;

3rd step, see Fig. 2, as shown in the figure, be placed on by slab on thin plate, make the two need partly overlapping of connection, the drift of stamping machine orders about internal layer punch and declines, slab is gone out the through hole of multiple diameter 6mm, the dead in line of slab through hole and thin plate through hole and quantity is equal;

4th step, see Fig. 3, as shown in the figure, internal layer punch continues to decline, punch presses down 3mm through whole thin plate through hole, make it be deformed into a hollow jut by extruding at the edge of slab through hole by shoulder part, this jut passes thin plate through hole and extends outward a bit of (as shown in Figure 4).

5th step, see Fig. 5, slab, thin plate entirety are transported on the thick die 4 of pier of upsetting machine, the thick punch 3 of pier of upsetting machine presses down, the part upsetting flat exposed by jut becomes connected node, make its outer surface being close to thin plate (as shown in Figure 6), thus slab, thin plate are fit together completely.

Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments without departing from the principles and spirit of the present invention, scope of the present invention is by claims and equivalents thereof.

Claims (1)

1. utilize a method for punching hole composite die connection metal thin plate and slab, it is characterized in that

The method has following steps:

The first step, first the cylindric internal layer punch set of the outer punch of a cylindrical shape and a band shoulder is synthesized a punching hole composite die, described internal layer punch periphery and described outer punch inner headed face are slidably matched, and are arranged on stamping machine by this punching hole composite die;

Second step, is placed on sheet metal on described stamping machine, and the drift of described stamping machine orders about described outer punch and declines, and described sheet metal goes out the larger through hole of multiple diameter according to proportional spacing, and then described drift drives outer punch to rise;

3rd step, metal thick plate is placed on described sheet metal, the two is made to need partly overlapping of connection, the drift of described stamping machine orders about described internal layer punch and declines, described slab is gone out the less through hole of multiple diameter, the dead in line of described slab through hole and described thin plate through hole and quantity is equal;

4th step, described internal layer punch continues to decline, and makes it be deformed into a hollow jut at the edge of described metal thick plate through hole by shoulder part by extruding, and this jut passes described thin plate through hole and extends outward a bit of;

5th step, described metal thick plate, sheet metal entirety are transported on upsetting machine, the thick punch of pier of described upsetting machine presses down, the part upsetting flat exposed by described jut becomes connected node, make it be close to the outer surface of described sheet metal, thus described metal thick plate, sheet metal are linked together securely.