CN102950166A

CN102950166A - Method for making multi-pass joint

Info

Publication number: CN102950166A
Application number: CN2012104288682A
Authority: CN
Inventors: 播磨宏
Original assignee: NINGBO SANJIN ELECTROMECHANICAL TECHNOLOGY Co Ltd
Current assignee: NINGBO SANJIN ELECTROMECHANICAL TECHNOLOGY Co Ltd
Priority date: 2011-11-11
Filing date: 2012-10-31
Publication date: 2013-03-06
Anticipated expiration: 2032-10-31
Also published as: CN102950166B; JP2013104465A

Abstract

Provided is a method for making multi-pass irregular pipe joint with a metal pipe, comprising the following steps: inserting a club-like plastic resin material inside the metal pipe; putting the metal pipe inserted with resin at the molding position inside the die; pressing the resin material at two end portions of the metal pipe, thereby making the central section of the metal pipe be protrude; sawing off the front end of the protruding portion again; and finally removing the resin material inside the pipe with a mechanical processing method and cleaning off the resin in the metal pipe. A procedure of drilling a hole at the central section of the metal pipe is also included before the insertion of the plastic resin. The metal pipe having received plastic resin treatment can have heating and annealing treatment and then be bent into various shapes of pipe joints. The invention effectively reduces the high cost of making the pipe joint with low-melting metal. The related problems are also solved, such as poor working environment, serious environmental problems resulting from lead, chemical sulfuric acid, nitric acid, and the like.

Description

The manufacture method of multiple way union

Technical field:

The present invention is a kind of manufacture method of making many logical special-shaped pipe joints with metal pipe.

Background technology:

The special-shaped pipe joints such as claw type, Y shape, cross, four-way have been adopted between the pipeline fitting in the heat exchanger of air-conditioning etc.We can be from following record patent documentation: JP 7-106407 communique is known the manufacture method of special-shaped pipe joint [day].

The manufacture method of the document is: in metal pipe, pour into the low melting point metal material that is lower than the metal pipe fusing point, then put into mould, again with two ends the low-melting-point metal pressurization to pour into of press from metal pipe, protrude after making the middle part pressurized of metal pipe, amputate and protrude position part foremost, at last the pipe after being shaped is added the low-melting-point metal that heat abstraction pours into.

But there is a problem in the manufacture method of prior art, has contained the lead that environment is had severe contamination in the low-melting-point metal that namely pours into.In addition, with stove heating and melting metal the time, not only the cost height of equipment and operating environment is abominable, even if behind the heating molten lead, the surface of pipe also has residual lead, needs for a long time to soak the lead thawing that makes its surface with chemical sulfuric acid nitric acid etc., and environmental disruption is very big.

Summary of the invention:

The technical problem to be solved in the present invention is, overcome above existing technological deficiency, a kind of manufacture method of multiple way union is provided, solved to essence and above-mentionedly made expensive that pipe joint produces with low-melting-point metal, the environmental issues such as serious environmental pollution that poor, the plumbous and chemical sulfuric acid nitric acid of operating environment etc. brings.

Technical solution of the present invention is that a kind of manufacture method of multiple way union is provided.At first in metal pipe, insert bar-shaped plastic resin material; Secondly put into the metal pipe that inserts resin at the shaping position of mould inside; Then the two-end part at metal pipe pressurizes to resin material, and the middle part of metal pipe is protruded; Again amputate the front end that protrudes the position; Remove the interior resin material of pipe with mach method at last, then process the resin in the clean metal pipe.Before inserting plastic resin, can also be included in the step of metal pipe middle part boring.Metal pipe after plastic resin is processed can carry out bending to behind the heating anneal pipe joint of various shapes again.

The present invention compared with prior art has a bit significant and beneficial effect: 1. manufacturing approach craft is simple, weak point consuming time.2. the plastic resin that removes with mach way can reclaim again to be reused, and cost is extremely cheap.3. replace metal with plastic resin, solved the serious environmental pollution that plumbous and chemical sulfuric acid nitric acid etc. bring, environmental benefit is outstanding.

Description of drawings:

Accompanying drawing 1 is the circulation figure of manufacturing process of the present invention

Accompanying drawing 2A is the flow chart making of multiple way union of the present invention

Accompanying drawing 2B is the flow chart making of multiple way union of the present invention

Accompanying drawing 2C is the flow chart making of multiple way union of the present invention

Accompanying drawing 2D is the flow chart making of multiple way union of the present invention

Accompanying drawing 2E is the flow chart making of multiple way union of the present invention

Accompanying drawing 3 is pie graphs of bender of the present invention

Accompanying drawing 4 is the three-way connection outside drawings after the moulding of the present invention

Accompanying drawing 5 is other shape outside drawings of three-way connection after the moulding of the present invention

Accompanying drawing 6 is the various many logical shape tube outside drawings after the use moulding of the present invention

In the accompanying drawing, 1, copper pipe; 1a, protrusion position; 1b, T word two-end part; 2, plastic resin; 3, mould; 4, the device of extrusion resin; 8, brace table; 8a, semi-circular grooves; 9a, three sides are all with three semicircular ditch mortises; 10, the axis of guide; 11, movable plate; 12, oil cylinder; 13, piston rod; 14, plug; 31, protrude the position; 32, tapering; 33, tapering

The specific embodiment:

The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.Multiple way union describes with a routine threeway wherein.Fig. 2 A 1 is the circulation figure of manufacturing process, and Fig. 2 A～Fig. 2 E is the shop drawings of metal pipe.

At first, S1, Fig. 2 A of copper pipe 1(Fig. 1 of sawed suitable length).Remove the copper scale (S2) at copper pipe 1 two ends then, at the interior bar-shaped plastic resin filler (S3, Fig. 2 B) that inserts circle of copper pipe 1, the length of resinous wood is identical with the length of copper pipe 1 with need.In addition, the external diameter outline of plastic resin 2 is less than the internal diameter of copper pipe 1.The kind of resinous wood 2 is circumscribed not, can adopt the resin material (for example, Merlon) of versatility etc.

Secondly, the copper pipe 1 that inserts plastic resin 2 is put into T word shaping dies (S4, Fig. 2 C).For example, shown in Fig. 2 C, it is to be 30 by straight-through position, centre that the inside of mould 3 becomes the formation structure of T font, and the middle position of protruding is 31 to consist of.Certainly protruding the position in the middle of also can accomplish greater than the external diameter that leads directly to about 1.5 times at position.The protrusion position 31 of mould 3 links to each other with 33 with tapering 32.

Then, the plastic resin 2 at copper pipe 1 two ends is pressurizeed the state of Fig. 2 C before for pressurization, Fig. 2 D state after for pressurization.Respectively there is the device 4 of 1 extrusion resin at the two ends of pressurization part, and the tonnage size of hydraulic press is not limit, and for example, the high tonnage press of 100t also can use.

After the pressurization, because being subject to the extruding of external force, plastic resin 2 drives copper pipe 1 to the direction protrusion at the intermediate space position (such as Fig. 2 D) 31 of mould.Protruding position 1a external diameter can be directly same with 1b, also can be less than or greater than 1b.Copper pipe 1 is along with external force forms T font (S4, Fig. 2 E) in mould.

After the moulding, from mould 3, take out the copper pipe 1 be shaped, after amputating copper pipe 1 and protruding the front end (S5) of position 1a, obtained the T font three-way connection shown in Fig. 2 E.At this moment, plastic resin 2 is also in the inside of copper pipe 1, and the method for removing this plastic resin is processed from the inside of copper pipe 1 clean (S6) after it being pulverized with instruments such as drill bits from P1, P2, three directions of P3 shown in Fig. 2 E.

Copper pipe 1 after plastic resin is processed can heating anneal after (S7), bend to again the pipe joint of various shapes.

This new manufacturing approach craft is simple, and cost is extremely cheap, and plastic resin can reclaim again and reuse.The equipment such as plumbous thawing furnace that use during to original technical employing low-melting point lead filling also no longer need, and greatly reduce cost and manpower.In addition, the most important thing is not re-use metal, solved plumbous pollution problem fully, protected environment and blood lead poisoning problem.

At last, make the pipe joint of claw type shape toward same direction bend pipe with the method for bending machining.Also can make according to the demand of product the pipe joint of various shapes, such as logical, horizontal logical, the claw branch junction in Y shape top, eccentric three-way, four-way etc.

Fig. 3 (a) (b) is processed into the bender that claw branch junction is used for the method for the effective bending machining of T word after the moulding.This device, counterdie be brace table 8 and be with fluted 8a to form, and patrix 9 all is comprised of with three semicircular ditch mortise 9a three sides, projection 1a and about straight-through part 1b put into semicircular ditch mortise 8a on the brace table 8.Push down 1a and the middle difference position of 1b with patrix 9 when crooked.The device of the T word pipe left and right sides 1b of branch pipe section and projection 1a can move alone.

In addition, the edge of each brace table 8 is fixing with the axis of guide 10, and this is equipped with again movable plate 11 on guide shaft 10.Then, the bottom of this movable plate 11 has been fixed the end of the piston rod 13 of oil cylinder 12 and has been fixed below support platform 8, and in addition, the upper strata is fixed with the end of inserting the plug 14 in 1b and the 1a again.So plug 14 changes along with oil cylinder 12 and moves.

The T font shaped article of need processing is put into above-mentioned bender T position, 1a and 1b external diameter are supporting in groove 8a, pressing mold 9 is pushed down the tripartite difference middle part of T word pipe T, then in 1a and 1b, insert respectively the plug 14 that links to each other with each oil cylinder 12, take the difference center of 1a and 1b as fulcrum, cylinder action drives plug and naturally is bent upwards, and makes 1a and 1b respectively behind pressurized, embeds in the groove 9a of patrix 9.As shown in Figure 4, about 2 of T word pipe the 1b of pipe section with become claw branch junction (S8, Fig. 4) after 1a is bent.

Claw branch junction joint after the moulding, after cleaning (S10), product inspection (S11), packing (S13).

Other shapes embodiment:

Except the claw branch junction joint, can also make the joint of a variety of other shapes.For example, such as the Y shape of Fig. 5, Fig. 6, H-shaped threeway, four-way etc. also applicable the present invention.The present invention is not limited to three-way shape, can also be used for the pipe joint of other Multiple Shape, and such as a in the accompanying drawing 6, b, c, d, e, f, g, h are exactly the various many logical shape tube outside drawings after the use moulding of the present invention.

The present invention also allows other variation, and as the large pipe of diameter is being inserted before or after the plastic resin, in the position boring that pipe need be shaped, the orientation that is conducive to the formingspace position is protruded.

The present invention is applicable to various metal pipes, and illustrational is take copper pipe as example, and the present invention also is applicable to other metal tube, such as aluminum pipe etc.

Claims

1. a metal pipe is made the manufacture methods of leading to special-shaped pipe joints more, may further comprise the steps:

(1) inserts bar-shaped plastic resin material in the metal pipe;

(2) put into the metal pipe that inserts resin at the shaping position of mould inside;

(3) two-end part at metal pipe pressurizes to resin material, and the middle part of metal pipe is protruded;

(4) amputate the front end that protrudes the position;

(5) remove the interior resin material of pipe with mach method, then process the resin in the clean metal pipe.

2. a kind of metal pipe according to claim 1 is made the manufacture method of many logical special-shaped pipe joints, it is characterized in that: in the front step that can also be included in the boring of metal pipe middle part of step (1).

3. a kind of metal pipe according to claim 1 is made the manufacture methods of many logical special-shaped pipe joints, it is characterized in that: after step (5), also comprise the step of metal pipe being carried out bending to behind the heating anneal again the pipe joint of various shapes.