CN101775484B - Furnace roller of roller-hearth heat treatment furnace - Google Patents
Furnace roller of roller-hearth heat treatment furnace Download PDFInfo
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- CN101775484B CN101775484B CN2010101421118A CN201010142111A CN101775484B CN 101775484 B CN101775484 B CN 101775484B CN 2010101421118 A CN2010101421118 A CN 2010101421118A CN 201010142111 A CN201010142111 A CN 201010142111A CN 101775484 B CN101775484 B CN 101775484B
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Abstract
The invention relates to a furnace roller of a roller-hearth heat treatment furnace, which comprises a roller body, wherein both ends of the roller body are respectively connected with a taper pipe big end of a taper pipe, the taper pipe small end of the taper pipe is respectively connected with a neck journal, the taper pipe is provided with an air hole, the embedded position of the neck journal and the taper pipe small end and the embedded position of the taper pipe big end and the roller body adopt interference fit, the length of the neck journal embedded into the taper pipe small end is 1.2-1.4 times of the diameter of the neck journal, the length of the taper pipe big end embedded into the roller body is 0.25-0.3 time of the diameter of the taper pipe big end, the length of the taper pipe big end embedded into the roller body is not less than 80mm, and the roller body is in butt welding with the taper pipe and the taper pipe is in butt welding with the neck journal. The invention can realize the integral homometric service of each part of the furnace roller.
Description
Technical field
The relevant a kind of furnace roller of the present invention, particularly a kind of furnace roller that is used for roller hearth heat-treated furnace.
Background technology
Roller hearth heat-treated furnace is unique industrial furnace that can carry out continuous heat treatment (quenching, normalizing, annealing, tempering etc.) after the metallurgy industry Medium and Heavy Plate Rolling, and furnace roller wherein is a key device.Because it is long-term, continuous in the very heavy Plate Steel of 680-1200 ℃ condition lower support that furnace roller is wanted, and realize steel plate moving in stove with the rotation of furnace roller, therefore require furnace roller will have oxidation-resistance property, hot strength and wear resistance, each parts that also requires to form furnace roller assemble rationally, connect reliable.
Fig. 2 a and Fig. 2 b are the synoptic diagram of the body of roll of the prior art and Taper Pipe connection place, the connecting mode that the connecting mode that Fig. 2 a adopts Taper Pipe 2 to embed in the body of roll 3, Fig. 2 b adopt the body of roll 3 to embed in the Taper Pipe 2.But when which kind of mode no matter, the furnace roller assembling of prior art all is to adopt transition fit and lap fillet welding to connect.Because fillet weld welding scope is little, welding strength is low, and transition fit can be gapped in the combination section, makes weld seam need bear stress in bending, is easy to cause fatigue cracking.
And the Taper Pipe upper air-vent position of prior art is random big, open middle part mostly at Taper Pipe, the Taper Pipe inner thermal insulator stacks irregular, like this hot gas of furnace roller inside apart from the supporting furnace roller bearing apart from weak point, effect of heat insulation is poor, cause the lubricant effect of bearing position bad, the easy Yin Wendu of bearing is raise and damage.
Because development of technology, parts such as the existing body of roll, Taper Pipe can satisfy various working condition requirements substantially when using separately, but it is because improper in the above-mentioned background technology to the assembling of each parts, whole furnace roller was lost efficacy in advance, can not adapt with the life-span of parts such as the body of roll, Taper Pipe, or because of bearing failure needs stopping production replacing bearing, influence is produced and the business economic benefit.
Summary of the invention
The invention provides a kind of furnace roller of roller hearth heat-treated furnace, with solve exist in the background technology because the assembling of each parts is improper, whole furnace roller was lost efficacy in advance, can not with the technical problem of the life-span equivalence of parts such as the body of roll, Taper Pipe.
For solving the problems of the technologies described above, the furnace roller of a kind of roller hearth heat-treated furnace of the present invention, comprise the body of roll, each links to each other described body of roll two ends with the Taper Pipe major part of a Taper Pipe, the Taper Pipe microcephaly of described Taper Pipe respectively connects an axle journal, offer pore on the described Taper Pipe, shrink-fit is all adopted in embedding place of described axle journal and Taper Pipe microcephaly's embedding place and the described Taper Pipe major part and the body of roll, described axle journal embedding Taper Pipe microcephaly's length is 1.2-1.4 times of axle journal diameter, the length of the described Taper Pipe major part embedding body of roll is 0.25-0.3 times of Taper Pipe diameter at butt end, and the length that described Taper Pipe major part embeds the body of roll is not less than 80mm, between the described body of roll and the Taper Pipe and Taper Pipe be with welding between the axle journal and dock welding.
Described axle journal is that H7/r6 cooperates with shrink-fit between the Taper Pipe microcephaly, and described Taper Pipe major part is that H7/r6 cooperates with shrink-fit between the body of roll.
Described axle journal embeds Taper Pipe microcephaly's length than more than the short 5mm of the length of Taper Pipe microcephaly endoporus.
Described pore satisfies relation apart from the distance L 2 of Taper Pipe major part welding position: 30mm＜L2≤50mm.
Be filled with alumina silicate fibre blanket in the described Taper Pipe, described Taper Pipe major part place is covered with the foraminous baffle plate.
Described alumina silicate fibre blanket for closely compressing, does not compress between pore and baffle plate between Taper Pipe microcephaly and pore.
The weld of described Taper Pipe microcephaly and axle journal all offers the groove of " U " font, offers " U " font groove on the body of roll of the described body of roll and Taper Pipe major part weld.
The roughness of described Taper Pipe microcephaly and axle journal mating surface is Ra3.2-1.6, and the roughness of described Taper Pipe major part and body of roll mating surface is Ra3.2-1.6.
Described Taper Pipe wall thickness is basic size+1mm, and body of roll external diameter is basic size+2mm.
Described body surface is a red bayberry particle uniform distribution.
The furnace roller of roller hearth heat-treated furnace of the present invention, by above technical scheme, the useful technique effect that reaches is: make between the body of roll of furnace roller and the Taper Pipe major part and the assembling between axle journal and the Taper Pipe microcephaly more firm, the weldquality of weld is reliable, resistant to bending stresses is strong and not easy to crack, the temperature at furnace roller axle journal place can remain on below 80 ℃, makes bearing and lubricating grease reliable operation.The present invention can realize that the integral body of each parts of furnace roller is with imitating military service.
Description of drawings
Fig. 1 is the structural representation of the furnace roller among the present invention;
Fig. 2 a and Fig. 2 b are the synoptic diagram of the body of roll of the prior art and Taper Pipe connection place.
Description of reference numerals
The 1-axle journal; The 2-Taper Pipe; The 3-body of roll; The 4-baffle plate; The 5-lagging material; The 6-bearing support; The 7-bearing; The 8-shaft coupling; The 9-motor; The 10-furnace wall; The 11-end cap; The L-furnace widths; The L1-roll body length; The L2-pore is apart from the distance of Taper Pipe major part welding position.
Embodiment
For shape of the present invention, structure and characteristics can be understood better, below will enumerate preferred embodiment and also be elaborated in conjunction with the accompanying drawings.
Furnace roller structure of the present invention comprises the body of roll 3 as shown in Figure 1, and each links the body of roll 3 two ends with the Taper Pipe stub end of a Taper Pipe 2, and the little head end of the Taper Pipe of Taper Pipe 2 respectively connects an axle journal 1.Under the heat insulation situation of needs, the stub end place of Taper Pipe 2 is covered with foraminous baffle plate 4, is filled with lagging material 5 in the cavity of Taper Pipe 2 and baffle plate 4 formation.
In furnace roller when work,, the body of roll 3 is located at the centre of two furnace walls 10, and its length L 1 is generally than the narrow 200mm of width L of stove, and Taper Pipe 2 is transition portions of 1 of the body of roll 3 and axle journal, is installed in the furnace wall 10.Axle journal 1 is installed in 7 li on bearing in the bearing support 6, and bearing 7 is used grease lubrication.Axle journal 1 usefulness end cap 11 sealings of furnace roller one end, the axle journal 1 usefulness shaft coupling 8 of the other end joins with motor 9, drives furnace roller by motor 9 and rotates, thereby the steel plate of placing on the furnace roller is moved.
The furnace roller of roller hearth heat-treated furnace of the present invention, when assembling between the body of roll 3 and the Taper Pipe 2 and Taper Pipe 2 all adopt to embed shrink-fit and dock the array mode of welding connection with the connection place between the axle journal 1 and assemble, specifically comprise the steps:
1, determine the body of roll 3 external diameters and Taper Pipe 2 wall thickness, determine between Taper Pipe microcephaly and the axle journal 1 and Taper Pipe major part and the body of roll 3 between the parameter that matches and the roughness of mating surface.
The roughness of mating surface was selected Ra3.2-1.6 by its quality of fit and economy thereof when Taper Pipe microcephaly and axle journal 1, Taper Pipe major part and the body of roll 3 assembled.For guaranteeing the intensity of the body of roll 3 and Taper Pipe 2, Taper Pipe 2 wall thickness are basic size+1mm, and the external diameter of the body of roll 3 is basic size+2mm.
All adopt shrink-fit between Taper Pipe microcephaly and the axle journal 1 and between the Taper Pipe major part and the body of roll 3, when determining to embed the parameter of combination section, the surface of external diameter is extruded in when needing to consider assembling, the crest value of original surface roughness has been reduced, can influence the modified value of mating surface shrink range, so shrink range adds the 1/3-1/2 roughness with the Theoretical Calculation minimum value.The microcephaly is long and diameter is little because of insert length, so select 1/3; Major part selects 1/2 because of the short diameter of insert length is big.Also consider the body of roll 3, Taper Pipe 2 simultaneously and roll neck is selected differing materials for use and cause linear expansivity there are differences, preferably select for use H7/r6 to cooperate so embed shrink-fit.
2, according to calculating the dimensioned body of roll 3, Taper Pipe 2, baffle plate 4 and the axle journal of determining 1.
Press the material mark prepared furnace charge, smelt the back rotational casting body of roll 3 with intermediate frequency furnace, the body of roll 3 surfaces are red bayberry particle uniform distribution.The red bayberry particle is that the spun cast pipe surface forms projection and the erratic surface particle in distribution of shapes gap, and its effect is the heat transfer area that increases furnace roller.
Precision casting Taper Pipe 2 does not allow Taper Pipe 2 surfaces that casting flaws such as crackle or shrinkage cavity are arranged, and offer pore on Taper Pipe 2.Pore is L2 apart from the distance of Taper Pipe major part welding position, and L2 subtracts furnace roller length L 1 with stove insied width L, divided by 2, considers that again the safe distance of pore and furnace wall comes to determine behind the elongation when deducting furnace roller work again.About L-L1=200mm, the elongation during furnace roller work is 60mm-80mm, considers that again pore and furnace wall have the safe distance of 10mm during general the design, so select the distance L 2≤50mm of pore apart from Taper Pipe major part welding position; Pore stops up when preventing to weld simultaneously, thus select pore apart from Taper Pipe major part welding position apart from 30mm＜L2≤50mm.The processing pore needs to carry out before welding, in order to avoid when gases are heated, they expand in the Taper Pipe 2 during welding, makes Taper Pipe 2 internal pressures excessive.
Forge axle journal 1, machining bevel for welding, and the size that cooperatively interacts of processing the body of roll 3, Taper Pipe 2 and axle journal 1 according to the parameter in the step 1.What the processing bevel for welding was concrete is the groove of all offering " U " font at the weld of Taper Pipe microcephaly and axle journal 1, forms the butt weld of " U " font; On the body of roll 3 of the body of roll 3 and Taper Pipe major part weld, offer " U " font groove.
With sheet material punching out baffle plate 4, and bore breather hole; Outsourcing lagging material 5, the anti-1260 ℃ high temperature alumina silicate fiber felt that can select producers such as Luyang, Shandong, Zhejiang Tim Cahill for use that lagging material is concrete.
3, hot charging Taper Pipe 2 and axle journal 1.
Taper Pipe is placed on the platform greatly upside down, and the microcephaly is heated to 200-220 ℃ with oxy-acetylene flame along microcephaly's circumferential direction last, makes the axle journal 1 mating surface Taper Pipe microcephaly endoporus 12 of packing into after axle journal 1 is sling, and firmly depresses in case of necessity.Axle journal 1 is that H7/r6 cooperates with Taper Pipe microcephaly's embedding place.
The length that axle journal 1 embeds the Taper Pipe microcephaly is 1.2-1.4 times of engage journal 1 diameter, if axle journal 1 embedding Taper Pipe microcephaly's length is too small, can make that cooperating of axle journal 1 and Taper Pipe 2 is stable inadequately, causes the furnace roller life-span to descend; If the length that embeds is long, the Taper Pipe microcephaly's of Pei Heing length also needs corresponding lengthening with it, but can cause the space of filling with insulation material 5 in the Taper Pipe 2 to narrow down, and influences the heat-proof quality of Taper Pipe 2, can cause the furnace roller life-span to descend equally.The length that axle journal 1 embeds the Taper Pipe microcephaly should produce stress concentration to avoid Taper Pipe microcephaly endoporus 12 and Taper Pipe 2 tapered sections than more than the short 5mm of the length of Taper Pipe microcephaly endoporus 12.
4, in Taper Pipe 2, adorn alumina silicate fibre blanket.
The 2 interior piecemeal alumina silicate fibre blankets of packing into from the Taper Pipe major part toward Taper Pipe, after exceeding Taper Pipe 2 pore 20mm, the alumina silicate fibre blanket that to pack into is compressed under the pore, compresses closely to guarantee pore to the alumina silicate fiber felt at Taper Pipe microcephaly place, prevents that effectively heat from reaching axle journal 1.And then the piecemeal plane that is filled to the Taper Pipe major part, need not compress, to guarantee in the boiler tube and to ventilate unimpeded on the Taper Pipe 2 between pore.Cover with foraminous baffle plate 4, and with baffle plate 4 and Taper Pipe 2 welding (spot welding or intermittent welding).
5, on the positioner of special use welding axle journal 1 and Taper Pipe microcephaly dock " U " font weld seam.
Special-purpose positioner is made up of two groups of four rollings, and one group two big rollers support the Taper Pipe major part, drives big roller with an electronic deceleration system and rotates, and realizes the rotation of workpiece; Two little rollers of another group are follow-up pulley, and supporting Taper Pipe microcephaly rotates Taper Pipe microcephaly and Taper Pipe major part synchronously.
Need before the weldering to adjust positioner, the medullary ray of Taper Pipe 2 is the level of state; With argon arc welding butt joint welding, and select for use and the consistent welding rod of Taper Pipe 2 materials.Backing welding must make the groove root fused together, carries out multi-pass welding again and connects; The postwelding penetration testing does not allow defective existence such as welding crack.
6, the hot charging body of roll 3 and Taper Pipe 2, and welding.
Adopt in the step 3 method same, with Taper Pipe 2 hot chargings of the body of roll 3 with tape spool neck 1 with hot charging Taper Pipe 2 and axle journal 1.The Taper Pipe major part is that H7/r6 cooperates with the body of roll 3 embeddings place.The mating surface roughness is selected Ra3.2-1.6 by its quality of fit.
The length of the Taper Pipe major part embedding body of roll 3 should be long as much as possible, but consider the restriction of scantlings of the structure, and the length of the optimal selection Taper Pipe major part embedding body of roll 3 is 0.25-0.3 times of Taper Pipe diameter at butt end, and length should be less than 80mm.If it is too small that the Taper Pipe major part embeds the length of the body of roll 3, then cooperate instability between Taper Pipe 2 and the body of roll 3, can influence the furnace roller assembly quality; If it is excessive that the Taper Pipe major part embeds the length of the body of roll 3, then the body of roll 3 needs the also corresponding lengthening of length of the mating surface of processing, makes that the stress point of furnace roller is farther from the supporting-point of furnace roller, causes the stress-bearing capability of furnace roller to descend, and still can influence the furnace roller life-span.To be the applicant draw according to the summary of experience of production practice for many years insert length scope between the above-mentioned body of roll 3, Taper Pipe 2 and the axle journal 1.
With similar in the step 5, on positioner, weld the body of roll 3 and Taper Pipe major part with butt-welded mode then, and select the welding rod multi-pass welding consistent for use with the mother metal material with argon arc welding.
7, the machining axle journal 1, with the geometrical shape that meets drawing and with the requirement that cooperates of bearing.
The furnace roller of the roller hearth heat-treated furnace that forms by above step, axle journal and Taper Pipe microcephaly's embedding place and embedding place of the Taper Pipe major part and the body of roll are shrink-fit, and use level is H7/r6, and the roughness of mating surface is Ra3.2-1.6.The tolerance of Taper Pipe wall thickness is basic size+1mm, and the tolerance of body of roll external diameter is basic size+2mm, and each inter-module that makes furnace roller is in conjunction with firm.
Each embedding place of furnace roller cooperates stable, and axle journal embedding Taper Pipe microcephaly's length is 1.2-1.4 times of axle journal diameter, and axle journal embeds Taper Pipe microcephaly's length than more than the short 5mm of the length of Taper Pipe microcephaly endoporus.The length of the Taper Pipe major part embedding body of roll is 0.25-0.3 times of Taper Pipe diameter at butt end, and length is not less than 80mm.
Furnace roller adopts the butt joint welding in addition, and the weld of Taper Pipe microcephaly and axle journal all offers the groove of " U " font, offers " U " font groove on the body of roll of the body of roll and Taper Pipe major part weld.Offer pore on the Taper Pipe; pore satisfies relation apart from the distance L 2 of Taper Pipe major part welding position: 30mm＜L2≤50mm; the alumina silicate fibre blanket of loading in the Taper Pipe between Taper Pipe microcephaly and pore for closely compressing; between pore and baffle plate, do not compress; can effectively control bearing temperature; it is heat insulation with the protection bearing.
Below enumerate 2 Comparative Examples of 3 specific embodiments and prior art, compare explanation with concrete data.
Embodiment 1:
The Taper Pipe major part embeds the chimeric place of the body of roll: the connecting mode and the butt-welded welding process that adopt interference to embed.Taper Pipe diameter at butt end 335mm, insert length 84mm, insert length is 0.25 times of Taper Pipe diameter at butt end, and embedding place adopts H7/r6 to cooperate, and groove type is a U-shaped;
Axle journal embeds Taper Pipe microcephaly's chimeric place: the connecting mode and the butt-welded welding process that adopt interference to embed.Axle journal diameter 70mm, insert length 84mm, insert length is 1.2 times of axle journal diameter, and embedding place adopts H7/r6 to cooperate, and the length 95mm of Taper Pipe microcephaly endoporus, axle journal embed Taper Pipe microcephaly's length than the short 11mm of the length of Taper Pipe microcephaly endoporus, and groove type is a U-shaped;
Pore apart from Taper Pipe major part welding position apart from 50mm;
Effect: with the equivalence of body of roll life-span, can reach 3 years normal work-ing life.
Embodiment 2:
The Taper Pipe major part embeds the chimeric place of the body of roll: the connecting mode and the butt-welded welding process that adopt interference to embed.Taper Pipe diameter at butt end 335mm, insert length 90mm, insert length is 0.27 times of Taper Pipe diameter at butt end, and embedding place adopts H7/r6 to cooperate, and groove type is a U-shaped;
Axle journal embeds Taper Pipe microcephaly's chimeric place: the connecting mode and the butt-welded welding process that adopt interference to embed.Axle journal diameter 70mm, insert length 90mm, insert length is 1.3 times of axle journal diameter, embedding place adopts H7/r6 to cooperate, the length 100mm of Taper Pipe microcephaly endoporus, axle journal embed Taper Pipe microcephaly's length than the short 10mm of the length of Taper Pipe microcephaly endoporus, and groove type is a U-shaped;
Pore apart from Taper Pipe major part welding position apart from 50mm;
Effect: with the equivalence of body of roll life-span, can reach 3 years normal work-ing life.
Embodiment 3:
The Taper Pipe major part embeds the chimeric place of the body of roll: the connecting mode and the butt-welded welding process that adopt interference to embed.Taper Pipe diameter at butt end 335mm, insert length 100mm, insert length is 0.3 times of Taper Pipe diameter at butt end, and embedding place adopts H7/r6 to cooperate, and groove type is a U-shaped;
Axle journal embeds Taper Pipe microcephaly's chimeric place: the connecting mode and the butt-welded welding process that adopt interference to embed.Axle journal diameter 70mm, insert length 98mm, insert length is 1.4 times of axle journal diameter, and embedding place adopts H7/r6 to cooperate, and the length 105mm of Taper Pipe microcephaly endoporus, axle journal embed Taper Pipe microcephaly's length than the short 7mm of the length of Taper Pipe microcephaly endoporus, and groove type is a U-shaped;
Pore apart from Taper Pipe major part welding position apart from 50mm;
Effect: with the equivalence of body of roll life-span, can reach 3 years normal work-ing life.
Comparative Examples 1:
The Taper Pipe major part embeds the chimeric place of the body of roll: adopt the connecting mode of transition embedding and the welding process of welded corner joint.Taper Pipe diameter at butt end 344mm, insert length 70mm, insert length is 0.2 times of Taper Pipe diameter at butt end, embedding place adopts H7/k6 to cooperate, and does not offer groove;
Axle journal embeds Taper Pipe microcephaly's chimeric place: the connecting mode and the butt-welded welding process that adopt transition to embed.Axle journal diameter 175mm, insert length 80mm, insert length is 0.46 times of axle journal diameter, embedding place adopts H7/k6 to cooperate, the length 90mm of Taper Pipe microcephaly endoporus, axle journal embed Taper Pipe microcephaly's length than the short 10mm of the length of Taper Pipe microcephaly endoporus, and groove type is a U-shaped;
Pore apart from Taper Pipe major part welding position apart from 157mm;
Effect:, in 1 year, occur losing efficacy with body of roll life-span inequivalence.
Comparative Examples 2:
The Taper Pipe major part embeds the chimeric place of the body of roll: adopt the connecting mode of transition embedding and the welding process of welded corner joint.Taper Pipe diameter at butt end 336mm, insert length 80mm, insert length is 0.24 times of Taper Pipe diameter at butt end, embedding place adopts H7/k6 to cooperate, and does not offer groove;
Axle journal embeds Taper Pipe microcephaly's chimeric place: the connecting mode and the butt-welded welding process that adopt transition to embed.Axle journal diameter 90mm, insert length 80mm, insert length is 0.89 times of axle journal diameter, and embedding place adopts H7/n6 to cooperate, and the length 80mm of Taper Pipe microcephaly endoporus, axle journal embed Taper Pipe microcephaly's length than the short 0mm of the length of Taper Pipe microcephaly endoporus, and groove type is a U-shaped;
Pore apart from Taper Pipe major part welding position apart from 145mm;
Effect:, in 1 year, occur losing efficacy with body of roll life-span inequivalence.
The present invention is the standardization of the assembly method of furnace roller structure, selects embedded shrink-fit for use and docks the combination coupling method of bevelling molten weldering on a large scale between the clear and definite furnace roller body of roll and the Taper Pipe major part and between axle journal and the Taper Pipe microcephaly.The length that embeds the body of roll with the Taper Pipe major part be the Taper Pipe diameter at butt end 0.25-0.3 doubly, and length is not less than 80mm; Axle journal embedding Taper Pipe microcephaly's length is 1.2-1.4 times of axle journal diameter, and than more than the short 5mm of bore length in the Taper Pipe microcephaly; The Taper Pipe pore apart from Taper Pipe major part weld apart from 30mm＜L2≤50mm.
The furnace roller of roller hearth heat-treated furnace of the present invention, make between the body of roll of furnace roller and the Taper Pipe major part and the assembling between axle journal and the Taper Pipe microcephaly more firm, the weldquality of weld is reliable, resistant to bending stresses is strong and not easy to crack, the temperature at furnace roller axle journal place can remain on below 80 ℃, makes bearing and lubricating grease reliable operation.The present invention can realize the integral body of each parts of furnace roller with the effect military service, and workable, can improve economic benefit of enterprises.
The above description of this invention is illustrative, and nonrestrictive, and those skilled in the art is understood, and can carry out many modifications, variation or equivalence to it within spirit that claim limits and scope, but they will fall within the scope of protection of the present invention all.
Claims (8)
1. the furnace roller of a roller hearth heat-treated furnace, comprise the body of roll, each links to each other described body of roll two ends with the Taper Pipe major part of a Taper Pipe, the Taper Pipe microcephaly of described Taper Pipe respectively connects an axle journal, offer pore on the described Taper Pipe, it is characterized in that, shrink-fit is all adopted in embedding place of described axle journal and Taper Pipe microcephaly's embedding place and the described Taper Pipe major part and the body of roll, described axle journal embedding Taper Pipe microcephaly's length is 1.2-1.4 times of axle journal diameter, described axle journal embeds Taper Pipe microcephaly's length than more than the short 5mm of the length of Taper Pipe microcephaly endoporus, the length of the described Taper Pipe major part embedding body of roll is 0.25-0.3 times of Taper Pipe diameter at butt end, and the length that described Taper Pipe major part embeds the body of roll is not less than 80mm, between the described body of roll and the Taper Pipe and Taper Pipe be with welding between the axle journal and dock welding; Described pore satisfies relation apart from the distance L 2 of Taper Pipe major part welding position: 30mm＜L2≤50mm.
2. the furnace roller of roller hearth heat-treated furnace as claimed in claim 1 is characterized in that, described axle journal is that H7/r6 cooperates with shrink-fit between the Taper Pipe microcephaly, and described Taper Pipe major part is that H7/r6 cooperates with shrink-fit between the body of roll.
3. the furnace roller of roller hearth heat-treated furnace as claimed in claim 1 is characterized in that, is filled with alumina silicate fibre blanket in the described Taper Pipe, and described Taper Pipe major part place is covered with the foraminous baffle plate.
4. the furnace roller of roller hearth heat-treated furnace as claimed in claim 3 is characterized in that, described alumina silicate fibre blanket for closely compressing, does not compress between pore and baffle plate between Taper Pipe microcephaly and pore.
5. the furnace roller of roller hearth heat-treated furnace as claimed in claim 1 is characterized in that, the weld of described Taper Pipe microcephaly and axle journal all offers the groove of " U " font, offers " U " font groove on the body of roll of the described body of roll and Taper Pipe major part weld.
6. the furnace roller of roller hearth heat-treated furnace as claimed in claim 1 is characterized in that, the roughness of described Taper Pipe microcephaly and axle journal mating surface is Ra3.2-1.6, and the roughness of described Taper Pipe major part and body of roll mating surface is Ra3.2-1.6.
7. the furnace roller of roller hearth heat-treated furnace as claimed in claim 1 is characterized in that, described Taper Pipe wall thickness is basic size+1mm, and body of roll external diameter is basic size+2mm.
8. the furnace roller of roller hearth heat-treated furnace as claimed in claim 1 is characterized in that, described body surface is a red bayberry particle uniform distribution, and described red bayberry particle is that body surface forms the erratic surface particle of projection and distribution of shapes gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101421118A CN101775484B (en) | 2010-03-30 | 2010-03-30 | Furnace roller of roller-hearth heat treatment furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101421118A CN101775484B (en) | 2010-03-30 | 2010-03-30 | Furnace roller of roller-hearth heat treatment furnace |
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| CN101775484A CN101775484A (en) | 2010-07-14 |
| CN101775484B true CN101775484B (en) | 2011-08-10 |
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| CN103224320A (en) * | 2013-05-16 | 2013-07-31 | 刘景忠 | Glass annealing lehr roller with heat dissipating holes |
| CN103667670A (en) * | 2013-10-29 | 2014-03-26 | 浦杰 | Nodulation-free furnace roller of roller-hearth type thermal treatment furnace |
| CN209416057U (en) * | 2018-12-04 | 2019-09-20 | 苏州中门子工业炉科技有限公司 | A kind of leakproofness furnace roller component of perhydro roller bottom furnace |
| CN109628863B (en) * | 2018-12-04 | 2023-08-29 | 苏州中门子工业炉科技有限公司 | Roller hearth furnace and process for full-hydrogen bright solid solution heat treatment of high-temperature nickel-base alloy pipe |
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