CN101053884A

CN101053884A - Expansion clinch bolt sleeve punching forming technology and special purpose cover die

Info

Publication number: CN101053884A
Application number: CN 200710017838
Authority: CN
Inventors: 李忠礼
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-04-27
Filing date: 2007-04-27
Publication date: 2007-10-17
Anticipated expiration: 2027-04-27
Also published as: CN100464891C

Abstract

The invention relates to a stamping forming technology of casing pipe with expansion rivet and bolt, including the following steps: (1) blanking: select tube having material, calibre and wall thickness according with the requirement and cutting out the tube into a predetermined length; (2) stamping hook: pressing one end of the casing pipe by a mould with a taper recess into a barb after clamping and fixing the casing pipe; (3) slotting: after clamping and fixing the casing pipe, punching the casing pipe to form a slot while a press head with a plurality of ribs inserting into the casing pipe;(4) closing up to cut waste material: cutting off waste material via cutting edge of the mould margin by inserting one end of the casing pipe with the barb into a mould for closing up and cutting waste material, pressing to contracting the end part of the casing pipe; (5) forming boss: holding and fixing the casing pipe by moulds in opposite directions, then inserting the pressing head into the other end and punching the same to form a boss. Special moulds in each procedure are also provided in the invention. By using stamping forming of the tube, the invention has advantages of high production efficiency and material utilization factor, in addition, due to an opening and closing manner is used by the moulds, requirement of device route height is reduced and the power consumption is lowered by achieving the punch using a small-tonnage punching machine, thus the invention reaches the specifications requirement of the product basically.

Description

Expansion riveting bolt sleeve punching forming technology and special-purpose cover die

Technical field

The present invention relates to five metals standard component manufacturing technology field, specifically a kind of expansion riveting bolt process for stamping and forming and special-purpose cover die.

Background technology

The method of at present general production expansion bolt sleeve pipe is at first to be inserted in inner core (counterdie) back from tube wall side jet-bedding in tubing, the large tonnage punch press of such arts demand, and four grooves divide and finish for four times, and efficient is also low, simultaneously can only make big caliber sleeve pipe, powerless to little caliber.

The new construction expansion riveting bolt of applicant's design is made up of sleeve pipe and a steel core of a band awl hook, boss, and its structure as shown in Figure 1.The expansion tube bottom is shaped on taper reducing groove, makes its underpart form tapering, and in addition, the expansion tube upper end is shaped on the bolt cap, and the lower end is shaped on fixed teeth, and steel core is cylindrical, and is positioned at expansion tube.Simple in structure, cost is low, processes easy for installationly, and installed surface is smooth smooth, and theftproof performance is good, particularly can normally use in narrow positions in the same old way, has solved expansion bolt in the out of use difficult problem of narrow positions.New construction expansion riveting bolt can be used for occasions such as building, all kinds of door and window, household electrical appliance installation in a large number.It is the regeneration product that modern architecture is installed a large amount of expansion bolts that use.

The expansion riveting bolt of new construction has the assembly that a cover pipe racks awl colludes, and this part casing length 65mm, pipe thickness 1～1.5mm are at the grooving of cover pipe racks awl hook one end along circumference towards long 25mm, wide 3.2mm, to guarantee its needs that close up.But if adopt traditional die-cut mode to be difficult to finish, and this procedure is the key point of this part processing.Adopt common process can't finish the making of this new construction expansion riveting bolt.

Summary of the invention

The object of the invention provides a kind of expansion riveting bolt sleeve punching forming technology and special-purpose cover die.

Specifically, expansion riveting bolt sleeve punching forming technology, it is to finish according to following steps:

(1) blanking: choose all satisfactory tubing of material, caliber and wall thickness and intercept into specific length;

(2) rammer hook: sleeve pipe is gripped the back strike out barb a at sleeve pipe one end with the mould that has a taper annular groove;

(3) fluting: sleeve pipe is gripped the back insert the sleeve pipe backlash grooving of cultrating with the drift that has a plurality of fins;

(4) close up and to cut waste material: have barb one end to stretch closing in that one of people has a taper hole sleeve pipe and cut in the waste material mould punching press and cannula tip is shunk and utilize the cutting edge of die edge to cut away waste material;

(5) shaping boss: utilize a mould holding fixed sleeving of splitting, in its other end, insert drift and the other end of sleeve pipe is made boss b by punching press.

According to the special-purpose cover die that above-mentioned expansion riveting bolt sleeve punching forming is adopted, it is to comprise following external member:

(1) rammer hook mould: (2-1 and counterdie (2-2) constitute, and patrix is shaped on a drift that can insert in the sleeve pipe on die body, are shaped on the cone tank of an annular in drift and die body junction by patrix; Counterdie is to have only the circular hole of placing fixed sleeving in die body;

(2) fluting mould: be made of drift (3-1), lower cavity die (3-2), drift has a plurality of fins; Lower cavity die is shaped on the circle sky of band boss in die body;

(3) the waste material mould is cut in closing in: this mould (4-1) is shaped on the taper hole that sleeve pipe barb one end is stretched on mold; An awl mouthful outward flange is shaped on cuts the waste material cutting edge;

(4) boss shaping dies: by upper punch (5-1), open mould (5-2) down and constitute; Opening mould down is that opposite opened structure and middle sky and sleeve pipe profile are coincide, and upper punch is shaped on the drift that can insert in the sleeve pipe on the mold one side.

Drift (3-1) in the fluting mould wherein is a quadrangular.Rely on four fins on the quadrangular that casing wall is broken four grooves of formation.

The present invention expand technology, the operation process of riveting bolt processing, be characterized in utilizing tube stamping to be shaped, production efficiency, stock utilization are all higher, because mould utilizes the folding mode, reduced the device travel requirement for height, and finish with little tonnage punch press, reduced energy consumption, reached the technical performance requirement of this product substantially.

Fig. 1 is the expansion riveting stud structure schematic diagram that the present invention processed.

Fig. 2 is a rammer hook mould schematic diagram.

Fig. 3 is fluting mould schematic diagram.

Fig. 4 cuts waste material mould schematic diagram for closing up.

Fig. 5 is a riveting bolt boss diel schematic diagram.

The specific embodiment

Part shown in Fig. 1 is the structural representation of expansion riveting bolt, and outer sleeve adopts the tubing of No. 35 steel, and steel core adopts first steel production.

Expansion riveting bolt sleeve punching forming technology, it is to finish according to following steps:

(4) close up and to cut waste material: have barb one end to stretch into a closing in that has a taper hole sleeve pipe and cut in the waste material mould punching press and cannula tip is shunk and utilize the cutting edge of die edge to cut away waste material;

(5) shaping boss: utilize a mould holding fixed sleeving of splitting, in its other end, insert drift and the other end of sleeve pipe is made boss b by punching press;

(6) surface press finishing.

According to the special-purpose cover die that above-mentioned expansion riveting bolt sleeve punching forming is adopted, accompanying drawing 1-5 has provided concrete structure.It comprises following external member:

(1) rammer hook mould: be made of patrix (2-1) and counterdie (2-2), patrix is shaped on a drift that can insert in the sleeve pipe on die body, is shaped on the cone tank of an annular in drift and die body junction; Counterdie is to have only the circular hole of placing fixed sleeving in die body;

(2) fluting mould: constitute the quadrangular of four fins of drift tool by drift (3-1), lower cavity die (3-2); Lower cavity die is shaped on the circle sky of band boss in die body;

This part casing length 65mm, pipe thickness 1～1.5mm is at the grooving of cover pipe racks awl hook one end along circumference towards long 25mm, wide 3.2mm, to guarantee its needs that close up.But if adopt traditional die-cut mode to be difficult to finish, and this procedure is the key point of this part processing, so designing mould is by once finishing to the mode of outer wall punching in the pipe.

Claims

1, expansion riveting bolt sleeve punching forming technology is characterized in that comprising following steps:

2, the special-purpose cover die of expansion riveting bolt sleeve punching forming is characterized in that comprising following external member:

3, the special-purpose cover die of expansion riveting bolt sleeve punching forming according to claim 2, the drift (3-1) in the mould that it is characterized in that slotting is a quadrangular.