CN100562587C - A kind of heating process of titanium oblique perforating rod ingot - Google Patents
A kind of heating process of titanium oblique perforating rod ingot Download PDFInfo
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- CN100562587C CN100562587C CNB2007100175650A CN200710017565A CN100562587C CN 100562587 C CN100562587 C CN 100562587C CN B2007100175650 A CNB2007100175650 A CN B2007100175650A CN 200710017565 A CN200710017565 A CN 200710017565A CN 100562587 C CN100562587 C CN 100562587C
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Abstract
The invention discloses a kind of heating process of titanium oblique perforating rod ingot, adopt horizontal stepped start-stop system Medium Frequency Induction Heating Furnace to replace traditional Sloping Hearth gas furnace, horizontal stepped start-stop system Medium Frequency Induction Heating Furnace has automatic feed mechanism, core watch temperature difference supervisory system and the fast material mechanism that proposes, and heat-processed is carried out automatically by program and the productive temp requirement set; Technology comprises that the titanium rod lifts on the storage rack by overhead traveling crane, is arranged in parallel on movable bin; Lifting gear rises to the rod of the titanium on the movable bin on the feeding rack of landslide by root by the productive temp of setting, and enters horizontal stepped start-stop system Medium Frequency Induction Heating Furnace in turn, and in burner hearth, the titanium rod moves forward by the beat stepped start-stop system of setting, and heats up gradually and soaking; When the titanium rod vertically and the discharging when all reaching processing requirement of radial temperature difference and samming time, and enter in the blow tank of Mannesmann piercing mill the titanium rod and become hollow forging by the cross piercing of nipping of the roll of Mannesmann piercing mill.Technological operation of the present invention is simple accurately, safety, environmental protection, cost are low.
Description
Technical field
The present invention relates to a kind of heating means of the metal pipe material course of processing, be specifically related to a kind of heating process of titanium oblique perforating rod ingot.
Background technology
In the process of making the titanium or titanium alloy seamless tubular goods, to be processed into titanium pipe or titanium " hollow forging " with the titanium rod earlier.One of technology of producing " hollow forging " is the cross piercing method.This method is that the solid titanium rod that will be about 1 meter is heated under the condition of high temperature, between promptly 900 ℃～1050 ℃, sends into two rollers then or the three-high cross piercing machine is rolling, under the acting in conjunction of roll and perforating head, through 20～30 seconds, real core titanium rod just was processed into the titanium pipe, i.e. the titanium hollow forging.In industrial production, heat real core titanium rod and adopt Sloping Hearth gas furnace or Sloping Hearth resistance furnace usually.Because gas furnace running cost is lower, in fact all adopts the Sloping Hearth gas furnace.The high end of wedged bottom stove one end is low, the real core titanium bar that is arranged in parallel is from the high end entrance of low temperature (about 600 ℃), and the low side to high temperature (1050 ℃) rolls gradually, and comes out of the stove from low side in turn by certain beat (1～2 minute), by one section roller-way, send into Mannesmann piercing mill then.
The gordian technique of titanium oblique perforating rod ingot heating is the homogeneity of heating and the stability of the preceding temperature of perforation.During rod base non-uniform temperature, the perforation procedure instability easily produces " back card " (wearing not saturating), and the perforating head damage is big, and main frame " vexed car " increases problems such as waste defective tube.
The heating that the Sloping Hearth gas furnace is used for steel, stainless oblique perforating rod ingot is a kind of suitable mature technology.But the pyrochemistry of titanium activity and thermal property and steel have a great difference, when the Sloping Hearth gas furnace is applied to the heating of titanium or titanium alloy oblique perforating rod ingot, have following shortcoming or problem:
1, the pyrochemistry of titanium is active strong, at high temperature easily oxidation, air-breathing.The titanium rod slowly heats up in the high temperature sloping hearth furnace, the long action time of titanium and furnace atmosphere (more than 1 hour) at high temperature, and pipe appearance zone of oxidation and air suction layer are thicker, are unfavorable for following process.
2, the Sloping Hearth gas furnace is bulky, can't with the Mannesmann piercing mill compact arrangement.Must the long roller-way of configuration between the outlet of Sloping Hearth gas furnace and the inlet of Mannesmann piercing mill.The thermal capacity of titanium is little, and cooling is fast, and there is bigger and unsettled temperature drop in the back titanium rod base of coming out of the stove on roller-way, and the excellent base temperature instability of boring a hole is unfavorable for perforation.
3, gas furnace contaminate environment, noise is big, and the workman will constantly carry out the high temperature stirring, poor working environment, labour intensity is big.
4, every stove will be adorned many material, during the intermittent type operation heating-up time long, be unsuitable for small serial production.
5, the gas furnace hot loss is big, the energy consumption of unit product height.
6, operator many (at least 4 people).
In industry, also often induction furnace is used for the heating of excellent base, as the heating of extrusion billet or the heating of die forging blank.But there is the bigger core table temperature difference in common induction heater because the induced current surface action makes excellent base heating inhomogeneous, can not satisfy the heat request that adds of oblique perforating rod ingot.
Summary of the invention
Defective and deficiency at above-mentioned prior art exists the objective of the invention is to, and a kind of heating process of titanium oblique perforating rod ingot is provided, adopt this technology can be quick, easy, reliably titanium rod base is heated, satisfy the requirement of cross piercing better.
In order to realize above-mentioned task, the present invention takes following technical solution:
A kind of heating process of titanium oblique perforating rod ingot, it is characterized in that, this process using stepped start-stop system Medium Frequency Induction Heating Furnace replaces Sloping Hearth gas furnace heating titanium rod, this kind process furnace has automatic feed mechanism, core watch temperature difference supervisory system and the fast material mechanism that proposes, heat-processed is carried out automatically by program and the productive temp requirement set, specifically comprises the following steps:
1) at first bundled titanium rod is lifted on the storage rack by overhead traveling crane;
2) the titanium rod on the storage rack is arranged in parallel on movable bin;
3), the rod of the titanium on the movable bin is risen on the feeding rack of landslide by root by the productive temp of setting by lifting gear;
4) the titanium rod order skid on the feeding rack of landslide enters horizontal stepped start-stop system Medium Frequency Induction Heating Furnace to the fire door of horizontal stepped start-stop system Medium Frequency Induction Heating Furnace in turn by charging ram, can hold 3～4 titanium rods in the burner hearth;
5) in burner hearth, the titanium rod moves forward by the beat stepped start-stop system of setting, and heats up gradually and soaking;
6) the titanium rod was heated to 900 ℃～1000 ℃ by room temperature in 3～4 minutes, and make the material core table temperature difference of titanium rod and radial temperature difference≤5 ℃, when the titanium rod vertically and radial temperature difference and samming time when all reaching processing requirement, the titanium rod that device will heat of carrying soon of discharging mechanism takes out from horizontal stepped start-stop system Medium Frequency Induction Heating Furnace rapidly;
7) the titanium rod of Qu Chuing enters in the blow tank of Mannesmann piercing mill rapidly by switching mechanism;
8) under the effect of push rod, the titanium rod is become hollow forging by the cross piercing of nipping of the roll of Mannesmann piercing mill.
The technical characterstic that method of the present invention is brought is:
1, heating is rapid, and oxidation is few.The titanium rod can be heated to 900 ℃～1000 ℃ by room temperature in 3～4 minutes, and make the bar core table temperature difference and radial temperature difference reach≤5 ℃, help the perforation.
2, equipment volume is little, and floor space is little, and process furnace appearance temperature is low, is convenient to form compact layout with Mannesmann piercing mill.Can enter Mannesmann piercing mill in moment (about 2 seconds) after titanium rod base is come out of the stove, the temperature drop after coming out of the stove is few, and the starting temperature substantially constant of blank perforation helps cross piercing and the quality that improves hollow forging.
3, every stove is suitable for production in enormous quantities as long as a small amount of material of dress just can operation, also is suitable for small serial production.
4, process furnace does not need preheating in advance and long-time cooling, can be with opening with stopping, and the production handiness is good.Particularly at main frame (tapping machine) when breaking down, horizontal stepped start-stop system Medium Frequency Induction Heating Furnace can quit work immediately; Main frame just often, horizontal stepped start-stop system Medium Frequency Induction Heating Furnace can restart immediately, cooperates host work.And the Sloping Hearth gas furnace does not allow blowing out immediately when main frame breaks down, and easily makes the empty burning of blank, causes blank oxidation and waste energy.
5, furnace charge (titanium rod) directly heating under faradic effect, thermosteresis is few, the thermo-efficiency height.Under intermittent type operation situation, the thermo-efficiency of horizontal stepped start-stop system Medium Frequency Induction Heating Furnace is more apparently higher than the Sloping Hearth gas furnace.
6, during this equipment work, no flue gas, noiseless, no inflammable and explosive substances, security is good, helps environmental protection.
7, during this equipment work, after the titanium rod hangs storage rack, can realize unattended operation, operator few (1 people), labour intensity is little.
When 8, using this equipment, the processing parameter of heat-processed comprises that the core table temperature difference of bar and vertical temperature difference etc. can show automatically, write down, store and print, and process controllability and trackability are good.
9, this equipment volume is little, makes electricity consumption and without coal gas or Sweet natural gas, floor space is little, and the equipment supplementary unit is few, the workshop less investment.
10, maintenance of the equipment is comparatively simple, and running cost is low.
Description of drawings
Fig. 1 is a process flow sheet of the present invention;
Fig. 2 be horizontal stepped start-stop system Medium Frequency Induction Heating Furnace and with the location diagram of oblique bundle tapping machine.
Fig. 3 is that the A of Fig. 2 is to view;
Fig. 4 is the heating unit main body and carries the apparatus structure synoptic diagram soon;
Label in the accompanying drawing is represented respectively: 1, storage rack, 2, movable bin, 3, lifting gear, 4, the landslide feeding rack, 5, charging ram, 6, horizontal stepped start-stop system Medium Frequency Induction Heating Furnace, 7, device is carried in discharging soon, 8, material stirring-up mechanism, 9, blow tank, 10, the Mannesmann piercing mill charging ram, 11, the Mannesmann piercing mill roll, 12, the Mannesmann piercing mill motor, 13, the fire-resistant boiler tube of tiing a knot, 14, the water-cooled inductor block, 15, thermal insulation layer, 16, the bakelite furnace shell, 17, the first vertical temperature difference transmitter, 18, the second vertical temperature difference transmitter, 19, the transmitter of radial temperature difference, 20, baffle plate, 21, inductor block, 22, from active roll, 23, carry drive-motor and speed reduction unit soon, 24, active roll, 25, turn-down rig, 26, chain.
The present invention is described in further detail below in conjunction with accompanying drawing.
Embodiment
The heating process of titanium oblique perforating rod ingot of the present invention adopts horizontal stepped start-stop system Medium Frequency Induction Heating Furnace to replace traditional Sloping Hearth gas furnace, is used for the heating of cross piercing titanium rod base.Process furnace has automatic charging and discharging mechanism, and heat-processed is automatically carried out by program and the productive temp requirement set.
Step of the present invention, the horizontal know-why of advancing the formula Medium Frequency Induction Heating Furnace was:
Utilize coil that exchange current is changed into induced current and heating of metal titanium rod by alternating magnetic field.By the frequency of continuous adjusting exchange current and the power of input, the heat radiation on control metal bar surface and the heat transfer to the bar core solve because the homogeneity question that the titanium bar that induced current " surface action " brings radially heats; Vertically move type of heating by stepped start-stop system, solve the axially homogeneity question of heating of titanium bar.By shortening the distance that process furnace discharge port and Mannesmann piercing mill are nipped mouthful, reduce the temperature drop after coming out of the stove simultaneously, guarantee the starting temperature substantially constant of oblique perforating rod ingot, be beneficial to bore a hole.The present invention adopts the stepped start-stop system Medium Frequency Induction Heating Furnace to replace traditional Sloping Hearth gas furnace, with titanium rod base be rapidly heated, all gentleness is sent into tapping machine fast and is formed a kind of accurately efficient, high-quality, safety, environment-friendly type, the heating technique of titanium cross piercing cheaply.
Referring to Fig. 4, horizontal stepped start-stop system Medium Frequency Induction Heating Furnace 6 comprises bakelite furnace shell 16, the fire-resistant boiler tube 13 of knotting, on fire-resistant boiler tube 13 internal surfaces of tiing a knot steel water-cooled guide rail 12 is arranged; Water-cooled inductor block 14 is arranged on the outside surface, bakelite furnace shell 16 and tie a knot and between the fire-resistant boiler tube 13 thermal insulation layer 15 is arranged also is equipped with first, second vertical temperature difference transmitter 17,18 of monitoring metal bar and the radial temperature difference transmitter 19 of monitoring metal bar in the horizontal induction furnace of stepped start-stop system tubulose.The burner hearth internal diameter of horizontal stepped start-stop system Medium Frequency Induction Heating Furnace 6 is little, only passes through for the single piece of metal rod, and whole boiler tube length only can be held 3 metal bars, and promptly total length gets final product for about 3 meters, is convenient to be configured in by the Mannesmann piercing mill compactly.Because the process furnace radiation heat loss is few, can influence the electric installation (as big motor) of Mannesmann piercing mill and hinder the workman on the tapping machine to operate.Because it can be configured in by the Mannesmann piercing mill compactly, thereby makes the floor space of Mannesmann piercing mill and process furnace integral body little.
Adopt horizontal stepped start-stop system Medium Frequency Induction Heating Furnace of the present invention that the metal bar base is heated to only about 3 minutes of required total time of specified temperature, rate of heating is fast, burning is air-breathing few, and in gas furnace or resistance furnace, need 60～90 minutes (depending on excellent base diameter) heat-up time, rapid heating helps reducing the oxidation of metal stock.The metal titanium rod strong for high temperature active is particularly important.
The transmitter 19 of monitoring metal bar vertical temperature difference transmitter 17,18 and radial temperature difference is used for vertical temperature difference and radial temperature difference (heart table temperature difference) monitoring at heat-processed metal bar base.Make metal bar base homogeneous heating, excellent base temperature-stable.After coming out of the stove, but metal bar moment (about 2 seconds) enters tapping machine, and the temperature drop after coming out of the stove is few, and the starting temperature of blank perforation is basicly stable, helps cross piercing.
Do not need preheating in advance during horizontal induction furnace 6 blow-ons of stepped start-stop system tubulose, and do not need long-time cooling during blowing out, can be with opening with stopping, the production handiness is good, the tapping machine higher to failure rate of machinery can be avoided blank long-time " the empty burning ", and this point is particularly important concerning the titanium rod.And every stove is suitable for production in enormous quantities as long as a small amount of material of dress just can operation, also is suitable for small serial production.
Referring to Fig. 4, carry device soon and mainly comprise and carry drive-motor and speed reduction unit 23, active roll 24 and a plurality of driven running roller 23 (at least five) soon turn-down rig 25 is being arranged from running roller 23 next doors; Carry drive-motor and speed reduction unit 23 driving gears soon and rotate, drive active roll 24, drive driven running roller 23 by chain 26 then and rotate together, impelling, the titanium rod of plug for outlet moves rapidly to active roll 24 directions by driven running roller 23.When the titanium rod touched baffle plate 20, inductor block 21 sent signal, and turn-down rig 25 starts after receiving signal immediately, the titanium rod is sent in the blow tank of Mannesmann piercing mill.The push rod 10 of Mannesmann piercing mill is sent into metal bar in the roll of Mannesmann piercing mill immediately then, under the acting in conjunction of roll and top, wears " hollow forging " (pipe).
Below be the embodiment that the contriver provides.
Referring to Fig. 1, the step of concrete enforcement of the present invention is as follows:
1, a collection of titanium rod with same length hangs on the storage rack 1.
2, the titanium rod have be arranged in parallel on the movable bin 2 of vibrating device neat.
3,, the titanium rod is risen on the feeding rack 4 of landslide by root by ordinary production beat (as 1 piece/minute or according to the processing requirement setting) or special order by lifting gear 3.
4, the titanium rod of titanium rod from landslide feeding rack skid to the heating fire door enters the horizontal stepped start-stop system Medium Frequency Induction Heating Furnace 6 in turn by push rod 5.Can hold 3 titanium rods in the burner hearth at most, head-to-tail before and after each titanium rod.
5, in burner hearth, titanium rod press beat (as 1 piece/minute, or set according to the diameter of titanium rod) and is moved forward along water-cooled guide rail stepped start-stop system, and intensification and soaking gradually.
6, the titanium rod was heated to 900 ℃～1000 ℃ by room temperature in 3～4 minutes, when the vertical temperature difference and the radial temperature difference of titanium rod reaches processing requirement (as≤5 ℃), and the samming time is when reaching specified requirement (as 1 minute), and the titanium rod that device 7 will heat of carrying soon of discharging mechanism takes out from stove rapidly.
7, by turn-down rig 8, the titanium of coming out of the stove rod (2 seconds) rapidly enters Mannesmann piercing mill blow tank 9.
8, under the effect of Mannesmann piercing mill push rod 10, high temperature titanium rod is nipped by the roll of Mannesmann piercing mill 11, and under the acting in conjunction of roll and perforating head, cross piercing becomes hollow forging.
Claims (3)
1. the heating process of a titanium oblique perforating rod ingot, it is characterized in that, this process using stepped start-stop system Medium Frequency Induction Heating Furnace replaces Sloping Hearth gas furnace and induction furnace distribution resistance soaking pit, and heat-processed is carried out automatically by program and the productive temp requirement set, specifically comprises the following steps:
1) at first bundled titanium rod is lifted on the storage rack by overhead traveling crane;
2) the titanium rod on the storage rack is arranged in parallel on movable bin;
3), the rod of the titanium on the movable bin is risen on the feeding rack of landslide by root by the productive temp of setting by lifting gear;
4) the titanium rod order skid on the feeding rack of landslide enters horizontal stepped start-stop system Medium Frequency Induction Heating Furnace to the fire door of horizontal stepped start-stop system Medium Frequency Induction Heating Furnace in turn by charging ram, can hold 3～4 titanium rods in the burner hearth;
5) in burner hearth, the titanium rod moves forward by the beat stepped start-stop system of setting, and heats up gradually and soaking;
6) the titanium rod was heated to 900 ℃～1000 ℃ by room temperature in 3～4 minutes, and make the core table temperature difference of titanium rod and radial temperature difference≤5 ℃, when the titanium rod vertically and radial temperature difference and samming time when all reaching processing requirement, the titanium rod that device will heat of carrying soon of discharging mechanism takes out from horizontal stepped start-stop system Medium Frequency Induction Heating Furnace rapidly;
7) the titanium rod of Qu Chuing enters in the blow tank of Mannesmann piercing mill rapidly by switching mechanism;
8) under the effect of push rod, the titanium rod is become hollow forging by the cross piercing of nipping of the roll of Mannesmann piercing mill.
2. technology as claimed in claim 1 is characterized in that, has vibrating device on the described movable bin.
3. technology as claimed in claim 1 is characterized in that, described stepped start-stop system Medium Frequency Induction Heating Furnace has automatic feed mechanism, core watch temperature difference supervisory system and the fast material mechanism that proposes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100175650A CN100562587C (en) | 2007-03-27 | 2007-03-27 | A kind of heating process of titanium oblique perforating rod ingot |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100175650A CN100562587C (en) | 2007-03-27 | 2007-03-27 | A kind of heating process of titanium oblique perforating rod ingot |
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| CN101029348A CN101029348A (en) | 2007-09-05 |
| CN100562587C true CN100562587C (en) | 2009-11-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101985132A (en) * | 2010-10-15 | 2011-03-16 | 中冶东方工程技术有限公司 | Method for producing thermally tandem-rolled seamless steel pipes |
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| CN107413852B (en) * | 2017-09-22 | 2019-04-30 | 攀钢集团研究院有限公司 | Preparation method for the pure titanium hollow billet of TA2 |
| CN107971706A (en) * | 2017-11-30 | 2018-05-01 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of production method of super large caliber titanium alloy seamless pipe |
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| CN113083904B (en) * | 2021-05-14 | 2022-03-15 | 燕山大学 | Pipe perforating method and device |
| CN115301731B (en) * | 2022-08-12 | 2023-10-31 | 索罗曼(常州)合金新材料有限公司 | Equidistant rolling method for spiral conical rollers of large-size titanium alloy bars |
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2007
- 2007-03-27 CN CNB2007100175650A patent/CN100562587C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985132A (en) * | 2010-10-15 | 2011-03-16 | 中冶东方工程技术有限公司 | Method for producing thermally tandem-rolled seamless steel pipes |
| CN101985132B (en) * | 2010-10-15 | 2013-06-26 | 中冶东方工程技术有限公司 | Method for producing thermally tandem-rolled seamless steel pipes |
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| CN101029348A (en) | 2007-09-05 |
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