CN102392656B - Reinforced serrated knife with flat head - Google Patents
Reinforced serrated knife with flat head Download PDFInfo
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- CN102392656B CN102392656B CN2011102116780A CN201110211678A CN102392656B CN 102392656 B CN102392656 B CN 102392656B CN 2011102116780 A CN2011102116780 A CN 2011102116780A CN 201110211678 A CN201110211678 A CN 201110211678A CN 102392656 B CN102392656 B CN 102392656B
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Abstract
The invention relates to a reinforced serrated knife with a flat head. The serrated knife comprises a knife handle and a knife body; a mounting groove with a cutting tooth fixed therein is arranged at the head part of the knife body; a wear-resistant cover layer is arranged at the edge of the groove mouth of the mounting groove through build-up welding; a plurality of wear-resistant poles are arranged on the negative angle surface of the knife body, and spherical faces with a radius of 5 to 7mm are arranged at the top of the wear-resistant poles; wear-resistant convex edges are arranged on the periphery on the negative angle surface of the knife body; a wear-resistant lug boss is arranged on the positive angle surface of the knife body through build-up welding; and a plurality of wear-resistant protrusions with a height of 4 to 6mm are arranged on the two side surfaces of the knife body. The invention has the advantages of higher wear-resistant performance and longer service life, can protect the cutter head of a shield machine against wearing, improves construction speed, and saves construction cost.
Description
Technical field
The present invention relates to a kind of reinforced serrated knife with flat head, comprise handle of a knife, cutter hub, the head of cutter hub is cutting teeth fixedly, and a plurality of wear-resisting stakes are set on the dorsal horn face of cutter hub, and many wear-resisting projections are set on the two sides of cutter hub.
Background technology
Shielding tunnel excavator, be called for short shield machine.Be a kind of special engineering machinery of tunnel piercing, be widely used in the construction of tunnel such as subway, railway, highway, municipal administration, water power.The basic functional principle of shield machine is exactly that a cylindrical steel assembly excavates soil while pushing ahead along the tunnel axis.The housing of this cylinder component is shield, and it plays a part temporary supporting to the also unlined Tunnel Section of excavating, and bears the pressure of soil layer on every side, sometimes also bears ground water pressure and underground water is kept off outside.The operations such as excavation, casting, lining cutting are carried out under the shielding of shield.Shield machine cutter, as the main cutting element of driving, is also shield machine key and important parts.The cutter assembled on shield machine is divided into two classes, i.e. dual-pilot cutter (as hobboing cutter, shell cutter etc.) and bite (as serrated knife with flat head, edge scraper etc.).
Existing serrated knife with flat head comprises handle of a knife, cutter hub, and cemented carbide body is installed on cutter hub.Serrated knife with flat head is when carrying out soil cutting, and when running into the higher soil body of lithosphere or sandy gravel stratum isodensity, the cemented carbide body wearing and tearing on cutter hub are comparatively serious.Chinese patent 200710195270.2 discloses a kind of cutter for metro shield, original subway is improved with shield cutter, concrete improvement content comprises three: 1) improved tool has the iron and steel kind on the basis of original shield cutter structure, selects 35CrMnSi as the cutter hub manufactured materials; 2) at new system cutter periphery knife-edge part, settle the carbide alloy installing hole, with soldering tech, be welded with the connection of hard alloy layer as carbide alloy and cutter hub in hole on every side, form " ball tooth " soldering assembling, be used for improving hardness and the abrasion resistance of hole; 3) application heap welding technology, at a kind of high-performance resurfacing welding material of peripheral knife-edge part built-up welding, strengthen shock resistance and the wear-resistant ability of shield cutter periphery.This invention can obviously improve the functional performance of shield structure with cutter, reduces maintenance frequency.But, when shield machine need to pass through the layer of sand that reaches the high and good fluidity of 540 meters quartz contents continuously, be easy to cause the wearing and tearing of cutter hub dorsal horn face and both sides and cause cutter to be scrapped, even cause the wearing and tearing of shield cutter; Owing to may occurring at any time gushing, do not allow to change cutter under normal pressure, difficulty of construction is very big, and urgent need will have more high-wear resistance and the more serrated knife with flat head of long life.So the present invention proposes a kind of reinforced serrated knife with flat head to solve above-mentioned construction problem.
Summary of the invention
The object of the present invention is to provide a kind of reinforced serrated knife with flat head, comprise handle of a knife, cutter hub, the head of cutter hub is cutting teeth fixedly, and a plurality of wear-resisting stakes are set on the dorsal horn face of cutter hub, and many wear-resisting projections are set on the two sides of cutter hub.The present invention has higher anti-wear performance and longer application life, can protect the cutterhead of shield machine not frayed.
The objective of the invention is to be realized by following technical proposals: a kind of reinforced serrated knife with flat head, comprise handle of a knife, cutter hub, the head of described cutter hub is provided with mounting groove, the interior fixedly cutting teeth of described mounting groove, the notch edge Induction Overlaying Welding Wear-resisting Coating of described mounting groove; A plurality of wear-resisting stakes are set on the dorsal horn face of described cutter hub, and the top of described wear-resisting stake is spherical shape, and its spherical radius is 5～7mm; The periphery of the dorsal horn face of described cutter hub arranges wear-resisting chimb, and many wear-resisting projections are set on the two sides of described cutter hub, and the height of described many wear-resisting projections is 4～6mm.
The present invention compared with prior art has following advantage:
1, a plurality of wear-resisting stakes are set on the dorsal horn face of cutter hub of the present invention, in the tunneling process of shield machine, wear-resisting stake directly contacts with layer of sand, has slowed down the wearing and tearing of layer of sand to cutter hub, has extended the application life of serrated knife with flat head.
2, many wear-resisting projections are set on the two sides of cutter hub of the present invention, make to be arranged on two serrated knife with flat heads adjacent on cutter head of shield machine along on movement locus, overlapping, slowed down the wearing and tearing of layer of sand to the cutter hub both sides, extended the application life of serrated knife with flat head.
3, the periphery of the dorsal horn face of cutter hub of the present invention arranges wear-resisting chimb, and the height of wear-resisting chimb, higher than the height of wear-resisting stake, makes wear-resisting chimb play certain protective effect to the wear-resisting stake of its inboard.
The accompanying drawing explanation
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1, structural representation of the present invention;
The schematic diagram of cutter hub dorsal horn face in Fig. 2, the present invention;
The scheme of installation of wear-resisting stake in Fig. 3, the present invention;
The schematic diagram of wear-resisting boss in Fig. 4, the present invention.
The specific embodiment
Referring to Fig. 1, Fig. 2, Fig. 3 (Fig. 2 is the top view of Fig. 1, and Fig. 3 is partial sectional view), reinforced serrated knife with flat head of the present invention, comprise handle of a knife 1, cutter hub 2, the head of described cutter hub is provided with mounting groove, the interior fixedly cutting teeth 3 of described mounting groove, the notch edge Induction Overlaying Welding Wear-resisting Coating 4 of described mounting groove; Induction Overlaying Welding Wear-resisting Coating can guarantee the firm welding of cutting teeth and reduce the wearing and tearing of layer of sand to cutting teeth, prevents that the phenomenon of tooth from occurring; A plurality of wear-resisting stakes 5 are set on the dorsal horn face 7 of described cutter hub, and wear-resisting stake adopts the carbide alloy of the YG13C trade mark to process, and its hardness is greater than 88.5HRA.In the present embodiment, seven wear-resisting stakes are set on the dorsal horn face of cutter hub; The top of described wear-resisting stake is spherical shape, and its spherical radius is 5～7mm; The periphery of the dorsal horn face of described cutter hub arranges wear-resisting chimb 6, on the two sides of described cutter hub, arrange many wear-resisting protruding 8, the thickness of described many wear-resisting projections is 4～6mm.Described many wear-resisting projections form mesh shape by the crisscross built-up welding of wear resistant alloy material on the cutter hub of steel work, and due to the wearproof alloy weld rod built-up welding, easily be out of shape on the cutter hub of steel work and faint crackle arranged, thus need not full weld, and the waste material; With mesh shape, replace plane, economical and effective.
In the present embodiment, described cutter hub is selected the 40Cr steel, quenches and increases temperature tempering after machining, makes the hardness of cutter hub reach HRC30～40, has enough rigidity and good welding performance to guarantee cutter hub.Adopt and forge rear machining processes, metal structure after the forging method thermal processing distortion due to distortion and the recrystallization of metal, make original large dendritic crystal and columnar grain become the axle recrystallized structures such as crystal grain is thinner, of uniform size, make compacting and the seam such as original segregation in steel ingot, loose, pore, slag inclusion, its tissue becomes tightr, has improved plasticity and the mechanical property of metal.Therefore, compare with foundry goods, cutter hub can significantly improve its organizational styucture and mechanical property after forging processing.Described mounting groove is the rectangular recess that both sides connect, and described cutting teeth embeds in described mounting groove, has increased the contact area of cutting teeth and layer of sand, and the cutting power of serrated knife with flat head is improved.Described cutting teeth adopts carbide alloy to process.Through the geologize survey report, high for the stratum quartz content, and the characteristics of the distance of working continuously, the cutting teeth in the present embodiment selects relatively high, the anti-wear carbide alloy of 702 trades mark relatively preferably of hardness to process.Described cutting teeth and cutter hub are fixed together by welding manner, and carbide cutting tooth and cutter hub adopt medium, high frequency CO
2Gas shielded welding, scolder adopt the copper silver composite soldering of domestic copper base-material series and import, and after welding, close inspection insulation, to eliminate welding stress, are guaranteed the quality of cutter.
Referring to Fig. 2, Fig. 3, in the present embodiment, seven wear-resisting stake installing holes 9 are set on the dorsal horn face of described cutter hub, described wear-resisting stake installing hole divides two rows to arrange, wherein first row arranges four wear-resisting stake installing holes, second row arranges three wear-resisting stake installing holes, and the wear-resisting stake of described two row installing hole shifts to install.Described wear-resisting stake 5 is cylinders of total length 25mm, diameter 10mm; In the present embodiment, the top of wear-resisting stake also can be circular flat, also can be arranged to chamfering between the circular flat of wear-resisting stake and cylinder.Fixed installation in described wear-resisting stake installing hole is implanted respectively in seven wear-resisting stakes, and fixing mode can be welding, can be also riveted joint.The above part of dorsal horn face of cutter hub is exposed in described wear-resisting stake, and namely the height of wear-resisting stake is 3～4mm.The periphery of the dorsal horn face of described cutter hub arranges wear-resisting chimb 6, and the width of described wear-resisting chimb is 4～6mm, and the height of wear-resisting chimb is 4～6mm.Described wear-resisting chimb, higher than wear-resisting stake 1～2mm, prevents that wear-resisting stake from exposing and collapse or come off, and makes wear-resisting chimb at the initial stage of shield-tunneling construction, play certain protective effect to the wear-resisting stake of its inboard.Wear-resisting chimb is formed on the cutter hub of steel work by the antifriction alloy built-up welding.
In the present embodiment, many wear-resisting projections are set on the two sides of described cutter hub, described many wear-resisting projections are formed by the welding rod built-up welding of wear resistant alloy material.The hardness of the wear resistant alloy material that requirement is selected is greater than 60HRC, and in the present embodiment, described wear resistant alloy material is cast tungsten carbide.The height of described many wear-resisting projections is 4～6mm, and the height of many wear-resisting projections can be selected in the scope of 4～6mm, and most preferred height is 6mm.Described many wear-resisting projections also can be formed by the Hardmetal materials built-up welding.
Referring to Fig. 4 (Fig. 4 is the left side view of Fig. 1), a plurality of wear-resisting stakes are set on the dorsal horn face of cutter hub of the present invention, in the tunneling process of shield machine, wear-resisting stake directly contacts with layer of sand, has slowed down the wearing and tearing of layer of sand to cutter hub, has extended the application life of serrated knife with flat head; Many wear-resisting projections are set on the two sides of cutter hub, make two serrated knife with flat heads adjacent on the cutterhead of shield machine along on movement locus, overlapping, slowed down layer of sand directly to the wearing and tearing of cutter hub both sides, extended the application life of serrated knife with flat head.In order to strengthen the protection of the positive edged surface 11 of cutter hub, build-up wear-resistant boss 10 on the positive edged surface of cutter hub, the height of described wear-resisting boss is 4～6mm.In the present embodiment, wear-resisting boss forms mesh shape by the crisscross built-up welding of wearproof alloy weld rod on the cutter hub of steel work, and due to the wearproof alloy weld rod built-up welding, easily be out of shape on the cutter hub of steel work and faint crackle arranged, thus need not full weld, and the waste material; With mesh shape, replace plane, effective more economically.
Reinforced serrated knife with flat head of the present invention can be arranged on the EPB shield machine of extra large Rake company, on the cutterhead of this shield machine altogether configuration center double-edged hobbing cutter 4, front and edge single-blade hob 31, reinforced serrated knife with flat head 64, edge scraper 8,1, the cutter of backbreaking.What configure 64 is contained in serrated knife with flat head respectively on four auxiliarys of cutterhead, on the same trajectories line, arrange two just two anti-communisms four serrated knife with flat head is participated in to cutting.Layout and the installation of reinforced serrated knife with flat head belong to prior art, are not described in detail herein.Apply shield-tunneling construction of the present invention tunnel, layer of sand is distributed more widely general in the horizontal direction, and on vertical direction, distributed pole is inhomogeneous, slightly close shape～in close shape, and quartz content is high.The most of crown in tunnel or full section face pass through layer of sand, reach continuously 540 meters, for current domestic shield-tunneling construction passes through the longest section of layer of sand, and pass through from the below of Airport Expwy, change during this time cutter dangerous large, owing to may occurring at any time gushing, do not allow to change cutter under normal pressure, difficulty of construction is very big.For arranging dorsad, when carrying out soil cutting, layer of sand requires very high to the anti-wear performance of rear corner surface due to adjacent two serrated knife with flat heads.
Facts have proved, assemble the shield machine of reinforced serrated knife with flat head of the present invention in the situation that do not change cutter, the continuous layer of sand that has passed through to reach 540m of success, and continuous operation 610m, wherein the reinforced serrated knife with flat head wearing and tearing all, between 4-7mm, belong to the normal wear scope.Serrated knife with flat head ensures together as the last of cutter head of shield machine, has reduced cutterhead damages in layer of sand risk.
Simultaneously in wide Buddhist subway 10 marks, the driving of right line success 1100m, cutter hub is complete, wearing and tearing all, between 3-8mm, belong to the normal wear scope, and in process, do not change 1 serrated knife.In wide Buddhist 10 mark stratum, the life-span of common serrated knife is 600-800m, and the life-span of reinforced serrated knife with flat head is greater than 1100m, is equivalent to save 1 whole dish serrated knife and bolt.Its price be 1700 yuan/, though than common serrated knife list expensive 200 yuan, wide Buddhist two-wire serrated knife overall expenses saving is larger, only direct cost is saved approximately 172800 yuan of RMB (disregard indirect expense: labour cost, electric power, duration etc.).
Claims (3)
1. a reinforced serrated knife with flat head, comprise handle of a knife, cutter hub, it is characterized in that: the head of described cutter hub is provided with mounting groove, the interior fixedly cutting teeth of described mounting groove, the notch edge Induction Overlaying Welding Wear-resisting Coating of described mounting groove; A plurality of wear-resisting stakes are set on the dorsal horn face of described cutter hub, and the top of described wear-resisting stake is spherical shape, and its spherical radius is 5～7mm; The periphery of the dorsal horn face of described cutter hub arranges wear-resisting chimb, and described wear-resisting chimb is higher than described wear-resisting stake 1～2mm; Many wear-resisting projections are set on the two sides of described cutter hub, and described many wear-resisting projections form mesh shape by the crisscross built-up welding of wear resistant alloy material on described cutter hub, and the height of described many wear-resisting projections is 4～6mm.
2. reinforced serrated knife with flat head according to claim 1, it is characterized in that: described many wear-resisting projections are formed by the wear resistant alloy material built-up welding.
3. reinforced serrated knife with flat head according to claim 1 and 2, it is characterized in that: build-up wear-resistant boss on the positive edged surface of described cutter hub, the height of described wear-resisting boss are 4～6mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102116780A CN102392656B (en) | 2011-07-27 | 2011-07-27 | Reinforced serrated knife with flat head |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102116780A CN102392656B (en) | 2011-07-27 | 2011-07-27 | Reinforced serrated knife with flat head |
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| CN102392656A CN102392656A (en) | 2012-03-28 |
| CN102392656B true CN102392656B (en) | 2013-11-27 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104060993A (en) * | 2014-06-30 | 2014-09-24 | 无锡市威海达机械制造有限公司 | Shield machine cutter |
| CN104060994A (en) * | 2014-06-30 | 2014-09-24 | 无锡市威海达机械制造有限公司 | Shield machine cutter |
| CN106238152A (en) * | 2016-08-30 | 2016-12-21 | 浙江华莎驰机械有限公司 | A kind of lithotrite tooth head |
| CN106216054B (en) * | 2016-08-30 | 2018-05-04 | 浙江华莎驰机械有限公司 | A kind of waste disposal combination particle toothing |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201241709Y (en) * | 2008-08-20 | 2009-05-20 | 刘玉海 | Scraper for shield machine |
| CN101451437A (en) * | 2007-12-06 | 2009-06-10 | 北京赛亿表面工程技术有限公司 | Cutter for metro shield |
| CN201778821U (en) * | 2010-01-22 | 2011-03-30 | 邵祥顺 | Super-wear-resistant shield cutter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4526212B2 (en) * | 2001-06-19 | 2010-08-18 | 株式会社タンガロイ | Drilling bit |
| JP4413800B2 (en) * | 2005-02-28 | 2010-02-10 | 清水建設株式会社 | Cutter bit |
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- 2011-07-27 CN CN2011102116780A patent/CN102392656B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101451437A (en) * | 2007-12-06 | 2009-06-10 | 北京赛亿表面工程技术有限公司 | Cutter for metro shield |
| CN201241709Y (en) * | 2008-08-20 | 2009-05-20 | 刘玉海 | Scraper for shield machine |
| CN201778821U (en) * | 2010-01-22 | 2011-03-30 | 邵祥顺 | Super-wear-resistant shield cutter |
Non-Patent Citations (2)
| Title |
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| JP特开2002-371782A 2002.12.26 |
| JP特开2006-241681A 2006.09.14 |
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Inventor after: Bi Shufeng Inventor after: Dong Zhendan Inventor after: Liu Baoxu Inventor after: Fan Yaping Inventor after: Wang An Inventor after: Wang Jianjun Inventor after: Bao Shibo Inventor after: You Guangwen Inventor after: Tang Dashuang Inventor before: Dong Zhendan Inventor before: Bi Shufeng Inventor before: Liu Baoxu Inventor before: Fan Yaping Inventor before: Wang An Inventor before: Wang Jianjun Inventor before: Bao Shibo Inventor before: You Guangwen Inventor before: Tang Dashuang |
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Free format text: CORRECT: INVENTOR; FROM: DONG ZHENTAN BI SHUFENG LIU BAOXU FAN YAPING WANG AN WANG JIANJUN BAO SHIBO YOU GUANGWEN TANG DASHUANG TO: BI SHUFENG DONG ZHENTAN LIU BAOXU FAN YAPING WANG AN WANG JIANJUN BAO SHIBO YOU GUANGWEN TANG DASHUANG |