CN101812856A - Production process of steel pile structure of cutter suction dredger - Google Patents

Abstract

The invention discloses a production process of the steel pile structure of a cutter suction dredger. The production process comprises the following steps: blanking boards, preparing a jig, machining and bending, performing sectionalized assembly of round tubes, performing integral-type assembling, measuring pin holes, positioning and installing, coating, removing the jig, etc. the invention has the advantages of high production precision, convenient preparation and good operational effect.

Description

Production process of steel pile structure of cutter suction dredger

Technical field:

The present invention relates to a kind of production process of steel pile structure of cutter suction dredger.

Background technology:

The cutter suction dredger stern is provided with two location piling bars, wherein main piling bar is mounted on the shiftable track chassis, its position is in the middle of the ship stern, 42 meters of main piling bar total lengths, body thickness of slab specification is respectively DH36 (25mm, 30mm, 40mm, 50mm, 60mm), three pin holes are arranged on the pile body in addition, and existing processes generally is difficult to satisfy Design Requirement Drawing.

Summary of the invention:

The object of the present invention is to provide a kind of production process of steel pile structure of cutter suction dredger of making precision height, easy to make, good working effect.

Technical solution of the present invention is:

A kind of production process of steel pile structure of cutter suction dredger is characterized in that: comprise the following steps:

(1) plate cutting: according to the drawing requirement, select the pretreated plate cutting of DH36, blank size is the most size of no surplus, and cutting stock precision is strict controlled in below the 1mm, the diagonal error is also below 1mm, hold successfully simultaneously during the groove blanking, the pipe crimping longitudinal weld longitudinal seam is " X " groove, and root 2mm is stayed in the centre, " v " font formula is adopted in the tube and tube butt joint, so the sheet material positive and negative is noted in blanking, reverse side is opened 30 ° of groove roots and is stayed the 2mm surplus, considers that thickness of slab difference position holds the transition groove successfully to scooping out;

(2) moulding bed is made: moulding bed is that bottom L125 angle steel supports, and top is that the semi arch template of Numerical control cutting R800mm is formed, and it is fixed that the moulding bed center line adopts laser transit to get, error control 0.5mm;

(3) machine volume circle: machine will be noted the positive and negative of sheet material, adds man-hour center of circle degree and is controlled in the 0.5mm, and the roll bending butt joint is " X " font groove, and root 2mm is stayed in the centre, positive CO ₂Capping is welded in welding automatically, electric current 180-200A, and voltage 24-26V, gas flow 20-25L/min carries out preheating to groove and both sides, 150 ℃-200 ℃ of preheat temperatures before the welding; Reverse side carbon arc air gouging back chipping goes out CO backward ₂Welding is carried out ultrasonic testing/ ultrasonic examination after every section pipe welding finishes, and in time reprocess at defective place;

(4) pipe segmentation assembling: pipe segmentation assembling is meant the pipe of identical wall thickness is winched on the moulding bed, allows it fit fully with the moulding bed template and docks moulding, and per two sections pipes should place 2mm welding allowance for shrinkage in the butt joint; Slope type adopts reverse side " v " font groove to stay root 2mm; Outside carbon plane back chipping goes out white, and longitudinal weld longitudinal seam answers anchor to open below the 300mm, and CO is adopted in butt joint ₂Or SMAW; When adopting SMAW, welding rod must cure 1 hour through 350 ℃-430 ℃ before using, put into 100-150 ℃ of insulating box then, ready access upon use, before the welding groove and both sides are carried out preheating, preheat temperature 150-200 ℃, be incubated with the rock wool blanket after welding is finished, after the insulation slow cooling, carry out straightness accuracy and proofread and correct;

(5) integral assembling: adopt segmentation assembling scheme to carry out integral assembling; The long 42m of pile body, the long 40m of pipe, precision control is adopted every 10 meters and is drawn wire to cooperate the firer to proofread and correct; Then with pile crown member welding assembly;

(6) pin hole measure, location and installation: pin hole full stake welding finish and concentricity, straight line degree measurement after the assay was approved, carry out measurement and positioning and install; With the pipe upper surface is datum, vertically draws chalk line to make pipe range direction straight line, rules with straight steel ruler flow control one pin hole position with the tube head benchmark in addition, draws the symmetrical holes of symmetrical end face after the perforate with weight, uses the position of finding out second and third hole with quadrat method.

(7) application: carry out painting work after pile body work is all over, the inner mechanical grinding method that adopts of pile body eliminates rust, and surface cleanness is the Sa2.0 level, paints then;

(8) tread flaking: break away from moulding bed after pile body paint finishes, something that gives the game away is mended mill.

The present invention makes precision height, easy to make, good working effect.

The invention will be further described below in conjunction with embodiment.

The specific embodiment:

A kind of production process of steel pile structure of cutter suction dredger comprises the following steps:

(1) plate cutting: according to the drawing requirement, select the pretreated plate cutting of DH36, blank size is the most size of no surplus, and cutting stock precision is strict controlled in below the 1mm, the diagonal error is also below 1mm, hold successfully simultaneously during the groove blanking, the pipe crimping longitudinal weld longitudinal seam is " X " groove, and root 2mm is stayed in the centre, " v " font formula is adopted in the tube and tube butt joint, so the sheet material positive and negative is noted in blanking, reverse side is opened 30 ° of groove roots and is stayed the 2mm surplus, considers that thickness of slab difference position holds the transition groove successfully to scooping out;

(2) moulding bed is made: moulding bed is that bottom L125 angle steel supports, and top is that the semi arch template of Numerical control cutting R800mm is formed, and it is fixed that the moulding bed center line adopts laser transit to get, error control 0.5mm;

(3) machine volume circle: machine will be noted the positive and negative of sheet material, adds man-hour center of circle degree and is controlled in the 0.5mm, and the roll bending butt joint is " X " font groove, and root 2mm is stayed in the centre, positive CO ₂Capping is welded in welding automatically, electric current 180-200A, and voltage 24-26V, gas flow 20-25L/min carries out preheating to groove and both sides, 150 ℃-200 ℃ of preheat temperatures before the welding; Reverse side carbon arc air gouging back chipping goes out CO backward ₂Welding is carried out ultrasonic testing/ ultrasonic examination after every section pipe welding finishes, and in time reprocess at defective place;

(4) pipe segmentation assembling: pipe segmentation assembling is meant the pipe of identical wall thickness is winched on the moulding bed, allows it fit fully with the moulding bed template and docks moulding, and per two sections pipes should place 2mm welding allowance for shrinkage in the butt joint; Slope type adopts reverse side " v " font groove to stay root 2mm; Outside carbon plane back chipping goes out white, and longitudinal weld longitudinal seam answers anchor to open below the 300mm, and CO is adopted in butt joint ₂Or SMAW; When adopting SMAW, welding rod must cure 1 hour through 350 ℃-430 ℃ before using, put into 100-150 ℃ of insulating box then, ready access upon use, before the welding groove and both sides are carried out preheating, preheat temperature 150-200 ℃, be incubated with the rock wool blanket after welding is finished, after the insulation slow cooling, carry out straightness accuracy and proofread and correct;

(5) integral assembling: adopt segmentation assembling scheme to carry out integral assembling; The long 42m of pile body, the long 40m of pipe, precision control is adopted every 10 meters and is drawn wire to cooperate the firer to proofread and correct; Then with pile crown member welding assembly;

(6) pin hole measure, location and installation: pin hole full stake welding finish and concentricity, straight line degree measurement after the assay was approved, carry out measurement and positioning and install; With the pipe upper surface is datum, vertically draws chalk line to make pipe range direction straight line, rules with straight steel ruler flow control one pin hole position with the tube head benchmark in addition, draws the symmetrical holes of symmetrical end face after the perforate with weight, uses the position of finding out second and third hole with quadrat method.

(7) application: carry out painting work after pile body work is all over, the inner mechanical grinding method that adopts of pile body eliminates rust, and surface cleanness is the Sa2.0 level, paints then;

(8) tread flaking: break away from moulding bed after pile body paint finishes, something that gives the game away is mended mill.

Claims (1)

1. a production process of steel pile structure of cutter suction dredger is characterized in that: comprise the following steps:

(1) plate cutting: according to the drawing requirement, select the pretreated plate cutting of DH36, blank size is the most size of no surplus, and cutting stock precision is strict controlled in below the 1mm, the diagonal error is also below 1mm, hold successfully simultaneously during the groove blanking, the pipe crimping longitudinal weld longitudinal seam is " X " groove, and root 2mm is stayed in the centre, " v " font formula is adopted in the tube and tube butt joint, so the sheet material positive and negative is noted in blanking, reverse side is opened 30 groove roots and is stayed the 2mm surplus, considers that thickness of slab difference position holds the transition groove successfully to scooping out;

(2) moulding bed is made: moulding bed is that bottom L125 angle steel supports, and top is that the semi arch template of Numerical control cutting R800mm is formed, and it is fixed that the moulding bed center line adopts laser transit to get, error control 0.5mm;

(3) machine volume circle: machine will be noted the positive and negative of sheet material, adds man-hour center of circle degree and is controlled in the 0.5mm, and the roll bending butt joint is " X " font groove, and root 2mm is stayed in the centre, positive CO ₂Capping is welded in welding automatically, electric current 180-200A, and voltage 24-26V, gas flow 20-25L/min carries out preheating to groove and both sides, 150 ℃-200 ℃ of preheat temperatures before the welding; Reverse side carbon arc air gouging back chipping goes out CO backward ₂Welding is carried out ultrasonic testing/ ultrasonic examination after every section pipe welding finishes, and in time reprocess at defective place;

(4) pipe segmentation assembling: pipe segmentation assembling is meant the pipe of identical wall thickness is winched on the moulding bed, allows it fit fully with the moulding bed template and docks moulding, and per two sections pipes should place 2mm welding allowance for shrinkage in the butt joint; Slope type adopts reverse side " v " font groove to stay root 2mm; Outside carbon plane back chipping goes out white, and longitudinal weld longitudinal seam answers anchor to open below the 300mm, and CO2 or SMAW are adopted in butt joint; When adopting SMAW, welding rod must cure 1 hour through 350 ℃-430 ℃ before using, put into 100-150 ℃ of insulating box then, ready access upon use, before the welding groove and both sides are carried out preheating, preheat temperature 150-200 ℃, be incubated with the rock wool blanket after welding is finished, after the insulation slow cooling, carry out straightness accuracy and proofread and correct;

(5) integral assembling: adopt segmentation assembling scheme to carry out integral assembling; The long 42m of pile body, the long 40m of pipe, precision control is adopted every 10 meters and is drawn wire to cooperate the firer to proofread and correct; Then with pile crown member welding assembly;

(6) pin hole measure, location and installation: pin hole full stake welding finish and concentricity, straight line degree measurement after the assay was approved, carry out measurement and positioning and install; With the pipe upper surface is datum, vertically draws chalk line to make pipe range direction straight line, rules with straight steel ruler flow control one pin hole position with the tube head benchmark in addition, draws the symmetrical holes of symmetrical end face after the perforate with weight, uses the position of finding out second and third hole with quadrat method.

(7) application: carry out painting work after pile body work is all over, the inner mechanical grinding method that adopts of pile body eliminates rust, and surface cleanness is the Sa2.0 level, paints then;

(8) tread flaking: break away from moulding bed after pile body paint finishes, something that gives the game away is mended mill.