CN101543856A

CN101543856A - Novel broaching device

Info

Publication number: CN101543856A
Application number: CN200810231455A
Authority: CN
Inventors: 张士军
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-12-22
Filing date: 2008-12-22
Publication date: 2009-09-30

Abstract

The invention relates to a novel broaching device which can make turned-over edges on pipes made of copper, aluminum and alloys of the copper and the aluminum, is used for enhancing the connection strength of a T-shaped branch pipe and widely used in industries, such as cooling, food, medicine, chemistry, and the like. A tool of a same type of the novel broaching device is only a T-shaped broaching device produced in Germany, the T-shaped broaching device has simple structure, unbalanced bearing force and more accessories, and a serious problem is as follows: the T-shaped broaching device can not process holes with the diameter of smaller than 10; the novel broaching device can process holes with the diameter of 8 or smaller holes, is convenient to operate and has more extensive application in practical production. The invention has the advantages that: (1) hooks are made of spring steel wires, thereby having high strength and abrasion resistance; (2) the novel broaching device has balanced bearing force during work due to three hooks, thereby having high broaching quality; (3) a mechanical type arrearage mechanism is adopted to rotate the hooks, thereby the operation process is simplified; and (4) the novel broaching device can make the turned-over edges of the holes with the diameter of 8 or the smaller holes.

Description

Novel broaching device

Technical field:

This implementation name is called " novel broaching device ".Can on the pipe of soft copper, semihard copper, hard copper, aluminium and aluminium alloy manufacturing, pull out flange.Be widely used in the industries such as refrigeration, food, medicine, chemical industry.

Background technology:

A kind of " the T type broaching device " that similar tools has only Germany to produce.But his is simple in structure, and problem is more.Such as, being subjected to force unbalance, more, the maximum problem of annex is to process the hole of Φ below 10.And this instrument can be processed Φ 8 or littler hole, uses more extensive in actual production.

Summary of the invention:

In industries such as refrigeration, food, medicine, chemical industry, run into two cross-coupled situations of copper pipe through regular meeting.When two different copper pipes of diameter interconnect, generally be on the big copper pipe of diameter, to bore a hole identical with the tubule diameter, will weld in the tubule patchhole then.Long when main, when general purpose tool can't reach internal work, it was just relatively more difficult to make flange.Generally speaking, because the wall thickness of copper pipe is thinner, the contact area between tubule and the bassoon is very little, and welding back mechanical strength is lower, and influence connects welding quality.If the hole of boring in bassoon is slightly less than the diameter of tubule.Then, hole wall is outwards pulled out a flange, weld then, will improve the contact area between two pipes.After the welding, mechanical strength also can increase greatly.Thereby the quality of product is improved greatly.And our instrument designs in order to pull out a flange on the hole of bassoon.

Description of drawings:

1, drag hook; 2, mandrel; 3, reinforce cover; 4, first guide pin bushing; 5, thread cap; 6, screw rod; 7, have strong market potential; 8, short pin; 9, base; 10, copper pipe.

Operation principle:

One, the tip of " pulling eye instrument " is inserted in the hole of accomplishing fluently turn " screw rod " (6).Owing to a spacing is arranged, about 2mm between " first guide pin bushing " (4) and " reinforcing cover " (3).Therefore, in the 2mm at first that screw rod begins to move, have only " first guide pin bushing " (4) 2mm that moves up, cause " drag hook " (1) below " first guide pin bushing " upwards to be dug.Rotation is about 30 ° in the groove of " mandrel " (2).Thereby the tip that makes " drag hook " (1) is outwards overturn 30 ° in rotation.Make three residing enlarged diameter of drag hook.This mechanism is called " time-delay mechanism " of machinery.

Two, at this moment, continue rotation " screw rod " (6), " having strong market potential " (7) contact above the slotted hole with " reinforcing cover " (3) having moved 2mm after, thereby begin to drive " mandrel " (2) and " reinforce and overlap " (3) move up together, rotate simultaneously.Under this effect, the moment of torsion of screw rod passes to " drag hook " (1) fully by the groove of mandrel, causes copper pipe and drag hook contact portion to produce plastic deformation under forceful action and produces " flange ".Contacting the back until the last plane of all parts with the lower plane of inside, " thread cap " (5) produces resistance and stops the rotation of " screw rod " (6), the complete operation process.

Three, take off this instrument after, reverse rotation " screw rod " (6).Because the existence of " time-delay " of this mechanism effect when the 2mm that " screw rod " moves down at first, has only " first guide pin bushing " (4) to move down and drive " drag hook " and produces reverse rotation, and " drag hook " (1) is resetted.The tip diameter of three " drag hooks " is dwindled.

Four, continue rotation " screw rod " (6), " having strong market potential " (7) contact below " reinforcing cover " (3) slotted hole having moved down 2mm after, thereby begin to drive " mandrel " (2) and " reinforce and overlap " (3) move down together, rotate simultaneously.Generation resistance after the lower plane of all parts and inner the last plane contact in " base " (9) and stop the rotation of " screw rod " (6), thus internal mechanism is resetted fully, finish the operation of a cyclic process.

The effect of " reinforcing cover " is to make the processing of " mandrel " easier, and increases the intensity and " drag hook " more reasonable stress when work of " mandrel ".Stress is concentrated and the minimizing life-span in order to avoid " drag hook " produces when work.

The effect of " short pin " is that " reinforcing cover " and " mandrel " are connected as one, and also can be welded as a whole with argon arc welding after two processing.

The technical characterstic of this instrument is: the drag hook that 1. adopts spring steel wire to make, and intensity is higher, wearability good; 2. three are drawn Stress balance when hook makes work, pulling eye quality height; 3. adopt mechanical type retardation mechanism to rotate drag hook, simplify the operation course. 4. can To make Φ 8 or the flange of aperture more.

Claims

1, a kind of rotation with screw rod by the mechanism of wrapping up in the enclosure, makes drag hook rotation back at the edge of copper pipe middle part boring, pulls out the novel trombone slide instrument of flange.It is characterized in that: by the once rotation of screw rod, make three drag hooks of this instrument finish the rotation of drag hook, overhanging and whole operations of stretching, make hole on the copper pipe tube wall around local deformation takes place, thereby produce outside tubular flange.

2, require described trombone slide instrument according to right 1, it is characterized in that:

1. the drag hook made from high manganese spring steel silk improves intensity and wearability;

Stress balance when 2. three drag hooks make work guarantees the pulling eye quality;

3. adopt mechanical type retardation mechanism controls drag hook, make three drag hooks finish the rotation of drag hook, overhanging and whole operations of stretching automatically, thereby simplify the operation course.