CN102615262A

CN102615262A - Method for lengthening pipe die of centrifugal cast pipe by build-up welding

Info

Publication number: CN102615262A
Application number: CN2012101131805A
Authority: CN
Inventors: 朱传斌; 张钊善; 马立
Original assignee: HEBEI XINXING DUCTILE IRON PIPES CO Ltd
Current assignee: HEBEI XINXING DUCTILE IRON PIPES CO Ltd
Priority date: 2012-04-18
Filing date: 2012-04-18
Publication date: 2012-08-01

Abstract

The invention discloses a method for lengthening a pipe die of a centrifugal cast pipe by build-up welding, and belongs to the technical field of metal welding processing. The method comprises the following steps of: (1) fixing a cylindrical base body at the excircle of one end of the pipe die of the centrifugal cast pipe to be lengthened, and performing build-up welding of an inner circle on the cylindrical base body; and (2) lathing off the cylindrical base body on a lathe, and turning and molding the pipe die, which is lengthened by build-up welding, of the centrifugal cast pipe on the lathe. By the method, the pipe die which is not long enough can be lengthened and recycled to fulfill the aim of energy saving and consumption reduction; and the method is convenient to operate, is simple in equipment and low in cost, and has good use and popularization values.

Description

A kind of method with built-up welding lengthening spun cast pipe pipe die

Technical field

The present invention relates to the metal solder processing technique field, especially a kind of method with built-up welding lengthening spun cast pipe pipe die.

Background technology

During with Lincoln weld built-up welding spun cast pipe pipe die, need the matrix that carries welding wire and solder flux during the beginning built-up welding, so can only on existing pipe die matrix, justify or cylindrical in the built-up welding under normal conditions.Like this, can only pipe die be welded thick, can't pipe die weldering is long.In the past pipe die repeatedly car weldering shrink and shorten above using after the tolerance, cause waste.

Summary of the invention

The present invention provides a kind of method with built-up welding lengthening spun cast pipe pipe die, and pipe die lengthening that can length is not enough is also recycled, and reaches energy saving purposes; Easy to operate, equipment is simple, cost is low, has value for applications preferably.

The technical scheme that the present invention taked is:

A kind of method with built-up welding lengthening spun cast pipe pipe die comprises the steps:

(1) the fixing tubular matrix at an end cylindrical place of the spun cast pipe pipe die of needs lengthenings is justified in the built-up welding on the tubular matrix;

(2) go up lathe tubular matrix car is fallen, the spun cast pipe pipe die that built-up welding is extended is lathed type on lathe.

Best, the tubular matrix is that thickness is that the band steel of 7-10mm is welded, will be with the steel car to fall after, be matrix built-up welding cylindrical with the interior circle of built-up welding, the spun cast pipe pipe die that then built-up welding is extended is lathed type on lathe.

The Lincoln weld built-up welding is adopted in built-up welding.

Spun cast pipe pipe die thickness is more than the 15mm, and spun cast pipe pipe die thickness leaks the pipe die weldering less than 15mm the time easily.

The length that the axial length of employed tubular matrix should will extend greater than the spun cast pipe pipe die.

When adopting a built-up welding, the internal diameter of tubular matrix is greater than more than the spun cast pipe pipe die external diameter 7mm.

Adopt the beneficial effect that technique scheme produced to be:

1. the pipe die lengthening that the present invention can be not enough with length comes into operation the pipe die that can't use originally again, reaches energy saving purposes.

2. the present invention has does not need extra used device, cost low, simple to operate, has value for applications preferably.

The specific embodiment

Embodiment 1

(1) at one week of an end cylindrical place of spun cast pipe pipe die welding band steel, is matrix, adopts circle in the Lincoln weld built-up welding with the band steel.Wherein, the thickness of band steel is 7-10mm.

(2) going up lathe and will be with the steel car to fall, is matrix built-up welding cylindrical with the interior circle of built-up welding;

(3) the spun cast pipe pipe die with the built-up welding lengthening is lathed type on lathe.

Embodiment 2

(1) at an end cylindrical place welded still pipe of spun cast pipe pipe die (internal diameter of steel pipe greater than spun cast pipe pipe die external diameter 7mm more than), be matrix with the steel pipe, circle in the built-up welding; Strip electrode electroslag surfacing is adopted in built-up welding.

(2) go up lathe the steel pipe car is fallen, the spun cast pipe pipe die that built-up welding is extended is lathed type on lathe.

Embodiment 3

(1) at end cylindrical place's socket cast iron pipe of spun cast pipe pipe die (internal diameter of cast iron pipe greater than spun cast pipe pipe die external diameter 7mm more than), be matrix with the cast iron pipe, circle in the built-up welding; Plasma arc surfacing is adopted in built-up welding.

(2) go up lathe the cast iron pipe car is fallen, the spun cast pipe pipe die that built-up welding is extended is lathed type on lathe.

Claims

1. the method with built-up welding lengthening spun cast pipe pipe die is characterized in that comprising the steps:

2. a kind of method with built-up welding lengthening spun cast pipe pipe die according to claim 1 is characterized in that said tubular matrix is welded for the band steel.

3. a kind of method with built-up welding lengthening spun cast pipe pipe die according to claim 2 after it is characterized in that band steel car fallen, is a matrix built-up welding cylindrical with the interior circle of built-up welding, and the spun cast pipe pipe die that then built-up welding is extended is lathed type on lathe.

4. according to claim 1,2 or 3 described a kind of methods, it is characterized in that said built-up welding is the Lincoln weld built-up welding with built-up welding lengthening spun cast pipe pipe die.

5. a kind of method with built-up welding lengthening spun cast pipe pipe die according to claim 2, the thickness that it is characterized in that said band steel is 7-10mm.