CN105880934A - Manufacturing method for high-precision cold-drawn inner-hole honed pipe - Google Patents

Abstract

The invention relates to a manufacturing method for a high-precision cold-drawn inner-hole honed pipe. The manufacturing method includes the following steps of heating, i.e., heating a tube blank in a circular furnace; perforation, i.e., perforating the hot tube blank through a perforating machine; annealing, i.e., annealing the tube blank; cold rolling, i.e., leading the annealed tube blank into a tube rolling mill for cold rolling to obtain a rolled tube; stress relief annealing, i.e., leading the rolled tube into a heating furnace for heating to obtain an annealed tube blank; acid pickling, i.e., carrying out acid pickling on the annealed tube blank to remove rust scale on the surface; phosphating, i.e., forming a chemically-generated zinc phosphate covering film on the surface of the tube blank; saponification, i.e., forming metallic soap and the like on the covering film to lubricate the covering film; cold drawing, i.e., carrying out cold drawing on the tube blank to be cold-drawn to obtain a cold-drawn tube; heat treatment, i.e., reducing residual stress of the cold-drawn tube through the quenching-tempering heat treatment process; honing, i.e., carrying out honing with a numerically controlled honing machine; and hot straightening treatment, i.e., carrying out hot straightening treatment to obtain a high-precision cold-drawn steel tube. The precision inner-hole honed tube which is high in yield strength, precise in dimension and smooth in surface is obtained by means of the method.

Description

A kind of manufacture method of high accuracy cold-drawn inner bore honing pipe

Technical field

The invention belongs to steel pipe preparing technical field, be specifically related to the system of a kind of high accuracy cold-drawn inner bore honing pipe Make method.

Background technology

As the cold process of the steel for mechanical structure pipes such as carbon steel, alloy steel or stainless steel, known to have by Drawing processing method that drawbench is carried out and the rolling processing method carried out by Pierre's form milling train.Wherein, by drawing The drawing processing method that machine is carried out, compared with the rolling processing method carried out by Pierre's form bundle machine, can be with high efficiency Ground manufactures cold working steel pipe, and this seamless steel pipe uses for oil hydraulic cylinder, pneumatic cylinder, at present, and domestic current Hi-grade steel its yield strength, dimensional discrepancy etc. of prescribed by standard all cannot meet actual oil hydraulic cylinder, air pressure The use requirement of cylinder so that the oil hydraulic cylinder of China, pneumatic cylinder seamless steel pipe can only dependence on import, constrain The development of China's cold drawing steel tube.

Summary of the invention

It is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of high accuracy cold-drawn endoporus top gem of a girdle-pendant The manufacture method of mill pipe, the accurate inner bore honing pipe that the method obtains, yield strength height, precision size, table Face is smooth, its store oil excellent performance, makes operating more smoothly, without stall condition, expanded service life, is suitable for In oil hydraulic cylinder, pneumatic cylinder, fork truck, crane, stacker, building machinery, punch press etc. various laborsaving automatically Change mechanical engineering.

The technical scheme provided according to the present invention, the manufacture method of a kind of high accuracy cold-drawn inner bore honing pipe includes Following steps:

(1), heating: 27SiMn pipe is heated in annular furnace 1300～1380 DEG C, and heat time heating time is 4～5 hours, thus ensure that heating of pipe blank is uniform；

(2), perforation: heat pipe base perforated machine is bored a hole, the temperature of hollow billet formed after perforation control 1250～ 1350 DEG C, and mesh control punch eccentricity and control pipe surface quality；

(3), annealing: pipe is introduced in continuous annealing furnace and anneals, and mesh control annealing temperature is 600～700 DEG C, annealing time is 70～90min, obtains the annealing pipe that annealing hardness (HV) is 210～217 Base；

(4), cold rolling: will annealing pipe introduce pipe mill cold rolling, the reciprocal time of the headstock of pipe mill be 50～ 60 times/min, the feeding a length of 6 every time of pipe～7mm/ time, obtain rolled pipe；

(5), stress relief annealing: rolled pipe is introduced in heating furnace and heats and be incubated, come out of the stove after furnace cooling, Obtain pipe of annealing, it is therefore intended that guarantee the intensity of steel pipe, when annealing temperature is too high, process strain recovery, Can not obtain the effect of processing hardening, annealing temperature is 550～650 DEG C, can obtain the effect of processing hardening, In order to remove the strength variance of cold tube rolling, in the stove of cold tube rolling, the retention time is 10～20 minutes；

(6), pickling processes: annealing pipe is carried out pickling, removes the scale on surface, concentration of hydrochloric acid: 7～ 19%, pickling time: 35～60 minutes, then neutralization pond rolling, roll number of times: 2～3 times, neutralizer PH Value: 9～10, then roll through clear water reserviors, roll number of times: 2～3 times；

(7), bonderizing: the chemistry forming zinc phosphate on the surface of pipe generates overlay film, zinc phosphate concentration: 20～30%, Phosphating Solution temperature: 68～75 DEG C, phosphating time: 10～20 minutes, Phosphating Solution free acidity: 4～7, General Acidity in Phosphating Solution: 45～75；

(8), saponification processes: form the lubricating film coated such as metallic soap on overlay film, saponification temperature: 55～75 DEG C, Saponification time: 8～15 minutes, saponification liquor pH value: 8～9；

(9), cold-drawn: will treat that cold-drawn pipe carries out cold-drawn processing, and obtain drawn tube, cold-drawing technology, mould plug Head and bore spacing: 3～5mm, drawing machine draft: 350～450t, saponification pipe pulls out the front storage period: 72～96h；

(10), heat treatment: using the Technology for Heating Processing that is tempered again after quenching, hardening heat is 800～900 DEG C, Hardening media is water, and temperature, at 550～650 DEG C, reduces the residual stress of drawn tube；

(11), honing: select numerical control honing machine, workpiece turn round, the form processing that honing head is reciprocating, Reach cylindricity: 0.01～0.02mm, Aperture deviation: 0.01～0.02mm, roughness: Ra0.25～0.35 High standard precision；

(12), thermal straightening processes: is incubated 45～60 minutes in low-temp temper furnace, then carries out thermal straightening process, Thermal straightening temperature 600～680 DEG C, obtain outer diameter tolerance: less than+1.0%, wall thickness tolerance: less than 10%, external diameter Out-of-roundness: less than 0.4%, eccentricity: less than 10%, linearity: less than in the precision of 0.5mm/m Hole honing tube.

Beneficial effects of the present invention is as follows: utilize the accurate inner bore honing pipe that the inventive method is produced, comprehensive Can be good, low-temperature impact toughness is good, has higher rotational deformation drag and wearability, and its yield strength exceedes 800MPa, by using cold-drawn, heat treatment and straightening process, makes described accurate inner bore honing pipe body Mechanical performance, rotational deformation drag, low-temperature impact work and anti-wear performance are up to standard, by controlling the geometry of body Size, residual stress, form variations and chemical analysis, it is possible to ensure the mechanical performance of body, high resistance to Mill property, low temperature resistant and high rotational deformation drag, precision size, smooth surface, its store oil excellent performance, make Operate more smoothly, without stall condition, expanded service life, it is adaptable to oil hydraulic cylinder, pneumatic cylinder, fork truck, The various laborsaving automated machine engineerings such as crane, stacker, building machinery, punch press.

Detailed description of the invention:

Below in conjunction with specific embodiment, the invention will be further described.

Embodiment one:

As a example by preparing a diameter of 159.3mm and the hole wall wall thickness 27SiMn steel pipe as 6.3mm, including with Lower step:

(1), heat: 27SiMn pipe is heated in annular furnace 1300 DEG C, and heat time heating time is 4 hours, Thus ensure that heating of pipe blank is uniform；

(2), boring a hole: heat pipe base perforated machine is bored a hole, the temperature of the hollow billet formed after perforation controls at 1250 DEG C, And mesh control punch eccentricity is 4%, pipe is carried out range estimation inspection, use remove pipe surface burr, Stick up skin, if pipe surface occurs or exists the obvious i.e. pit that naked eyes are obvious, runs over and injure and crackle, then should Reject, it is to avoid flow into subsequent processing, to control pipe surface quality；

(3), annealing: pipe is introduced in continuous annealing furnace and anneals, and mesh control annealing temperature is 600 DEG C, annealing time is 70min, obtains the annealing pipe that annealing hardness (HV) is 210；

(4), cold rolling: by cold rolling for annealing pipe introducing pipe mill, the reciprocal time of the headstock of pipe mill is 50 Secondary/min, being every time sent into a length of 6mm/ time of pipe, obtain rolled pipe；

(5), stress relief annealing: rolled pipe is introduced in heating furnace and heats and be incubated, come out of the stove after furnace cooling, Obtain pipe of annealing, it is therefore intended that guarantee the intensity of steel pipe, when annealing temperature is too high, process strain recovery, Can not obtain the effect of processing hardening, annealing temperature is 550 DEG C, can obtain the effect of processing hardening, in order to Removing the strength variance of cold tube rolling, in the stove of cold tube rolling, the retention time is 10 minutes；

(6), pickling processes: annealing pipe is carried out pickling, removes the scale on surface, concentration of hydrochloric acid: 7%, Pickling time: 35 minutes, then neutralization pond rolling, roll number of times: 2 times, neutralizer pH value: 9, then warp Clear water reserviors roll, and roll number of times: 2 times；

(7), bonderizing: the chemistry forming zinc phosphate on the surface of pipe generates overlay film, zinc phosphate concentration: 20%, Phosphating Solution temperature: 68 DEG C, phosphating time: 10 minutes, Phosphating Solution free acidity: 4, Phosphating Solution is total Acidity: 45；

(8), saponification processes: form the lubricating film coateds such as metallic soap, saponification temperature: 55 DEG C, saponification on overlay film Time: 8 minutes, saponification liquor pH value: 8；

(9), cold-drawn: will treat that cold-drawn pipe carries out cold-drawn processing, and obtain drawn tube, cold-drawing technology, mould plug Head and bore spacing: 3mm, drawing machine draft: 350t, saponification pipe pulls out front storage period: 72h；

(10), heat treatment: the Technology for Heating Processing being tempered again after using quenching, hardening heat is 800 DEG C, and quenching is situated between Matter is water, and temperature, at 550 DEG C, reduces the residual stress of drawn tube；

(11), honing: select numerical control honing machine, workpiece turn round, the form processing that honing head is reciprocating, Reach cylindricity: 0.01mm, Aperture deviation: 0.01mm, roughness: the high standard precision of Ra0.25；

(12), thermal straightening processes: is incubated 45 minutes in low-temp temper furnace, then carries out thermal straightening process, heat Straightening temperature 600 DEG C, obtains yield strength (MPa): 805, outer diameter tolerance :+0.5%, wall thickness tolerance: 8%, External diameter out-of-roundness: 0.3%, eccentricity: 6%, the accurate inner bore honing pipe of linearity: 0.4mm/m.

After testing, institute's inspection project meets GB/T3639-2009 standard to the product that the present embodiment obtains, and product closes Lattice, meet user to yield strength, the requirement of dimensional discrepancy.

A kind of accurate inner bore honing pipe and the contrast in technical performance of conventional steel pipe

Embodiment two:

As a example by preparing a diameter of 139.9mm and the hole wall wall thickness 27SiMn steel pipe as 7.9mm, including with Lower step:

(1), heat: 27SiMn pipe is heated in annular furnace 1380 DEG C, and heat time heating time is 5 hours, Thus ensure that heating of pipe blank is uniform；

(2), boring a hole: heat pipe base perforated machine is bored a hole, the temperature of the hollow billet formed after perforation controls at 1350 DEG C, And mesh control punch eccentricity is 5%, pipe is carried out range estimation inspection, use remove pipe surface burr, Stick up skin, if pipe surface occurs or exists the obvious i.e. pit that naked eyes are obvious, runs over and injure and crackle, then should Reject, it is to avoid flow into subsequent processing, to control pipe surface quality；

(3), annealing: pipe is introduced in continuous annealing furnace and anneals, and mesh control annealing temperature is 700 DEG C, annealing time is 90min, obtains the annealing pipe that annealing hardness (HV) is 217；

(4), cold rolling: by cold rolling for annealing pipe introducing pipe mill, the reciprocal time of the headstock of pipe mill is 60 Secondary/min, being every time sent into a length of 7mm/ time of pipe, obtain rolled pipe；

(5), stress relief annealing: rolled pipe is introduced in heating furnace and heats and be incubated, come out of the stove after furnace cooling, Obtain pipe of annealing, it is therefore intended that guarantee the intensity of steel pipe, when annealing temperature is too high, process strain recovery, Can not obtain the effect of processing hardening, annealing temperature is 650 DEG C, can obtain the effect of processing hardening, in order to Removing the strength variance of cold tube rolling, in the stove of cold tube rolling, the retention time is 20 minutes；

(6), pickling processes: annealing pipe is carried out pickling, removes the scale on surface, concentration of hydrochloric acid: 19%, Pickling time: 60 minutes, then neutralization pond rolling, roll number of times: 3 times, neutralizer pH value: 10, then warp Clear water reserviors roll, and roll number of times: 3 times；

(7), bonderizing: the chemistry forming zinc phosphate on the surface of pipe generates overlay film, zinc phosphate concentration: 30%, Phosphating Solution temperature: 75 DEG C, phosphating time: 20 minutes, Phosphating Solution free acidity: 7, Phosphating Solution is total Acidity: 75；

(8), saponification processes: form the lubricating film coateds such as metallic soap, saponification temperature: 75 DEG C, saponification on overlay film Time: 15 minutes, saponification liquor pH value: 9；

(9), cold-drawn: will treat that cold-drawn pipe carries out cold-drawn processing, and obtain drawn tube, cold-drawing technology, mould plug Head and bore spacing: 5mm, drawing machine draft: 450t, saponification pipe pulls out front storage period: 96h；

(10), heat treatment: the Technology for Heating Processing being tempered again after using quenching, hardening heat is 900 DEG C, and quenching is situated between Matter is water, and temperature, at 650 DEG C, reduces the residual stress of drawn tube；

(11), honing: select numerical control honing machine, workpiece turn round, the form processing that honing head is reciprocating, Reach cylindricity: 0.02mm, Aperture deviation: 0.02mm, roughness: the high standard precision of Ra0.35；

(12), thermal straightening processes: is incubated 60 minutes in low-temp temper furnace, then carries out thermal straightening process, heat Straightening temperature 680 DEG C, obtains outer diameter tolerance :+0.6%, wall thickness tolerance: 7%, external diameter out-of-roundness: 0.35%, wall Thickness ununiformity degree: 8%, the accurate inner bore honing pipe of linearity: 0.32mm/m.

Embodiment three:

As a example by preparing a diameter of 140.4mm and the hole wall wall thickness 27SiMn steel pipe as 8.3mm, including with Lower step:

(1), heating: 27SiMn pipe is heated in annular furnace 1350 DEG C, and heat time heating time is 4.5 little Time, thus ensure that heating of pipe blank is uniform；

(2), boring a hole: heat pipe base perforated machine is bored a hole, the temperature of the hollow billet formed after perforation controls at 1300 DEG C, And mesh control punch eccentricity is 4.5%, pipe is carried out range estimation inspection, use remove pipe surface burr, Stick up skin, if pipe surface occurs or exists the obvious i.e. pit that naked eyes are obvious, runs over and injure and crackle, then should Reject, it is to avoid flow into subsequent processing, to control pipe surface quality；

(3), annealing: pipe is introduced in continuous annealing furnace and anneals, and mesh control annealing temperature is 650 DEG C, annealing time is 80min, obtains the annealing pipe that annealing hardness (HV) is 215；

(4), cold rolling: by cold rolling for annealing pipe introducing pipe mill, the reciprocal time of the headstock of pipe mill is 55 Secondary/min, being every time sent into a length of 6.5mm/ time of pipe, obtain rolled pipe；

(5), stress relief annealing: rolled pipe is introduced in heating furnace and heats and be incubated, come out of the stove after furnace cooling, Obtain pipe of annealing, it is therefore intended that guarantee the intensity of steel pipe, when annealing temperature is too high, process strain recovery, Can not obtain the effect of processing hardening, annealing temperature is 600 DEG C, can obtain the effect of processing hardening, in order to Removing the strength variance of cold tube rolling, in the stove of cold tube rolling, the retention time is 15 minutes；

(6), pickling processes: annealing pipe is carried out pickling, removes the scale on surface, concentration of hydrochloric acid: 15%, Pickling time: 45 minutes, then neutralization pond rolling, roll number of times: 2.5 times, neutralizer pH value: 9.5, Rolling through clear water reserviors, roll number of times: 2.5 times again；

(7), bonderizing: the chemistry forming zinc phosphate on the surface of pipe generates overlay film, zinc phosphate concentration: 25%, Phosphating Solution temperature: 70 DEG C, phosphating time: 15 minutes, Phosphating Solution free acidity: 5, Phosphating Solution is total Acidity: 65；

(8), saponification processes: form the lubricating film coateds such as metallic soap, saponification temperature: 65 DEG C, saponification on overlay film Time: 12 minutes, saponification liquor pH value: 8.5；

(9), cold-drawn: will treat that cold-drawn pipe carries out cold-drawn processing, and obtain drawn tube, cold-drawing technology, mould plug Head and bore spacing: 4mm, drawing machine draft: 390t, saponification pipe pulls out front storage period: 84h；

(10), heat treatment: the Technology for Heating Processing being tempered again after using quenching, hardening heat is 850 DEG C, and quenching is situated between Matter is water, and temperature, at 600 DEG C, reduces the residual stress of drawn tube；

(11), honing: select numerical control honing machine, workpiece turn round, the form processing that honing head is reciprocating, Reach cylindricity: 0.015mm, Aperture deviation: 0.018mm, roughness: the high standard precision of Ra0.32；

(12), thermal straightening processes: is incubated 55 minutes in low-temp temper furnace, then carries out thermal straightening process, heat Straightening temperature 650 DEG C, obtains outer diameter tolerance :+0.6%, wall thickness tolerance: 8%, external diameter out-of-roundness: 0.38%, wall Thickness ununiformity degree: 7%, the accurate inner bore honing pipe of linearity: 0.45mm/m.

Claims (1)

1. the manufacture method of a high accuracy cold-drawn inner bore honing pipe comprises the steps:

(1), heating: SAE1020 pipe is heated in annular furnace 1300～1380 DEG C, and heat time heating time is 4～5 hours, thus ensure that heating of pipe blank is uniform；

(2), perforation: heat pipe base perforated machine is bored a hole, the temperature of hollow billet formed after perforation control 1250～ 1350 DEG C, and mesh control punch eccentricity and control pipe surface quality；

(3), annealing: pipe is introduced in continuous annealing furnace and anneals, and mesh control annealing temperature is 600～700 DEG C, annealing time is 70～90min, obtains the annealing pipe that annealing hardness (HV) is 210～217 Base；

(4), cold rolling: will annealing pipe introduce pipe mill cold rolling, the reciprocal time of the headstock of pipe mill be 50～ 60 times/min, the feeding a length of 6 every time of pipe～7mm/ time, obtain rolled pipe；

(5), stress relief annealing: rolled pipe is introduced in heating furnace and heats and be incubated, come out of the stove after furnace cooling, Obtain pipe of annealing, it is therefore intended that guarantee the intensity of steel pipe, when annealing temperature is too high, process strain recovery, Can not obtain the effect of processing hardening, annealing temperature is 550～650 DEG C, can obtain the effect of processing hardening, In order to remove the strength variance of cold tube rolling, in the stove of cold tube rolling, the retention time is 10～20 minutes；

(6), pickling processes: annealing pipe is carried out pickling, removes the scale on surface, concentration of hydrochloric acid: 7～ 19%, pickling time: 35～60 minutes, then neutralization pond rolling, roll number of times: 2～3 times, neutralizer PH Value: 9～10, then roll through clear water reserviors, roll number of times: 2～3 times；

(7), bonderizing: the chemistry forming zinc phosphate on the surface of pipe generates overlay film, zinc phosphate concentration: 20～30%, Phosphating Solution temperature: 68～75 DEG C, phosphating time: 10～20 minutes, Phosphating Solution free acidity: 4～7, General Acidity in Phosphating Solution: 45～75；

(8), saponification processes: form the lubricating film coated such as metallic soap on overlay film, saponification temperature: 55～75 DEG C, Saponification time: 8～15 minutes, saponification liquor pH value: 8～9；

(9), cold-drawn: will treat that cold-drawn pipe carries out cold-drawn processing, and obtain drawn tube, cold-drawing technology, mould plug Head and bore spacing: 3～5mm, drawing machine draft: 350～450t, saponification pipe pulls out the front storage period: 72～96h；

(10), heat treatment: using the Technology for Heating Processing that is tempered again after quenching, hardening heat is 800～900 DEG C, Hardening media is water, and temperature, at 550～650 DEG C, reduces the residual stress of drawn tube；

(11), honing: select numerical control honing machine, workpiece turn round, the form processing that honing head is reciprocating, Reach cylindricity: 0.01～0.02mm, Aperture deviation: 0.01～0.02mm, roughness: Ra0.25～0.35 High standard precision；

(12), thermal straightening processes: is incubated 45～60 minutes in low-temp temper furnace, then carries out thermal straightening process, Thermal straightening temperature 600～680 DEG C, obtain outer diameter tolerance: less than+1.0%, wall thickness tolerance: less than 10%, external diameter Out-of-roundness: less than 0.4%, eccentricity: less than 10%, linearity: less than in the precision of 0.5mm/m Hole honing tube.