CN102392656A - Reinforced serrated knife with flat head - Google Patents
Reinforced serrated knife with flat head Download PDFInfo
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- CN102392656A CN102392656A CN2011102116780A CN201110211678A CN102392656A CN 102392656 A CN102392656 A CN 102392656A CN 2011102116780 A CN2011102116780 A CN 2011102116780A CN 201110211678 A CN201110211678 A CN 201110211678A CN 102392656 A CN102392656 A CN 102392656A
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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 tack serrated knife, 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 convexities are set on the two sides of cutter hub.
Background technology
The shield tunnel development machine is called for short shield machine.Be a kind of special engineering machinery of tunnel piercing, be widely used in 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 a shield, and it plays a part interim support to the also unlined tunnel section of excavating, and bears the pressure of soil layer on every side, also bears ground water pressure and with underground water retaining outside sometimes.Operations such as excavation, casting, lining cutting are carried out under the shielding of shield.Shield machine cutter also is shield machine key and important components as the main cutting element of driving.The cutter that assembles on the shield machine is divided into two types, promptly go ahead of the rest cutter (like hobboing cutter, shell cutter etc.) and bite (like tack serrated knife, edge scraper etc.).
Existing tack serrated knife comprises handle of a knife, cutter hub, and cemented carbide body is installed on the cutter hub.The tack serrated knife is carrying out soil body when cutting, and when running into the higher soil body of lithosphere or sandy gravel stratum isodensity, the cemented carbide body wearing and tearing on the cutter hub are comparatively serious.Chinese patent 200710195270.2 discloses a kind of metro shield and has used cutter; Original subway is improved with shield cutter; Concrete improvement content comprises three: 1) the improvement cutter has the iron and steel kind on the basis of original shield cutter structure, selects for use 35CrMnSi as the cutter hub manufactured materials; 2) settle the carbide alloy installing hole at new system cutter periphery knife-edge part, add the weldering hard alloy layer around in the hole as being connected of carbide alloy and cutter hub with soldering tech, formation " ball tooth " soldering is assembled, and is used for improving the 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, strengthens the 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 pass through the layer of sand that reaches 540 meters quartz content height and good fluidity 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 possibly occur gushing at any time, do not allow replacing cutter under the normal pressure, difficulty of construction is very big, and urgent need will have more high-wear resistance and more the tack serrated knife of long life.So the present invention proposes a kind of reinforced tack serrated knife to solve above-mentioned construction problem.
Summary of the invention
The object of the present invention is to provide a kind of reinforced tack serrated knife, 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 convexities 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 realize by following technical proposals: a kind of reinforced tack serrated knife, comprise handle of a knife, cutter hub, the head of said cutter hub is provided with mounting groove, the interior fixedly cutting teeth of said mounting groove, the notch edge build-up wear-resistant coating of said mounting groove; A plurality of wear-resisting stakes are set on the dorsal horn face of said cutter hub, and the top of said wear-resisting stake is a spherical shape, and its spherical radius is 5～7mm; The periphery of the dorsal horn face of said cutter hub is provided with wear-resisting chimb, and many wear-resisting convexities are set on the two sides of said cutter hub, and the height of said many wear-resisting convexities 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 prolonged the application life of tack serrated knife.
2, many wear-resisting convexities are set on the two sides of cutter hub of the present invention, make to be installed in two adjacent on cutter head of shield machine tack serrated knives, slowed down the wearing and tearing of layer of sand, prolonged the application life of tack serrated knife the cutter hub both sides along overlapping on the movement locus.
3, the periphery of the dorsal horn face of cutter hub of the present invention is provided with wear-resisting chimb, and the height of wear-resisting chimb is higher than the height of wear-resisting stake, makes wear-resisting chimb play the certain protection effect to its inboard wear-resisting stake.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Fig. 1, structural representation of the present invention;
The sketch map of cutter hub dorsal horn face among Fig. 2, the present invention;
The scheme of installation of wear-resisting stake among Fig. 3, the present invention;
The sketch map of wear-resisting boss among Fig. 4, the present invention.
The specific embodiment
Referring to Fig. 1, Fig. 2, Fig. 3 (Fig. 2 is the vertical view of Fig. 1, and Fig. 3 is a partial sectional view), reinforced tack serrated knife of the present invention; Comprise handle of a knife 1, cutter hub 2; The head of said cutter hub is provided with mounting groove, the interior fixedly cutting teeth 3 of said mounting groove, the notch edge build-up wear-resistant coating 4 of said mounting groove; The build-up wear-resistant 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 taking place; A plurality of wear-resisting stakes 5 are set on the dorsal horn face 7 of said 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 said wear-resisting stake is a spherical shape, and its spherical radius is 5～7mm; The periphery of the dorsal horn face of said cutter hub is provided with wear-resisting chimb 6, be provided with on the two sides of said cutter hub many wear-resisting protruding 8, the thickness of said many wear-resisting convexities is 4～6mm.Said many wear-resisting convexities form mesh shape by the crisscross built-up welding of wear resistant alloy material on the cutter hub of steel work, because wearproof alloy weld rod built-up welding easy deformation and faint crackle is arranged on the cutter hub of steel work, thus need not full weld, and waste material; Replace plane, economical and effective with mesh shape.
In the present embodiment, said cutter hub is selected the 40Cr steel for use, and quenching after the machining increases temperature tempering, makes the hardness of cutter hub reach HRC30～40, has enough rigidity and good welding performance to guarantee cutter hub.Adopt and forge the back machining processes; Metal structure passes through behind the forging method thermal processing distortion because metal deformation and crystallization again; Make original large dendritic crystal and columnar grain become axle recrystallized structures such as crystal grain is thinner, of uniform size; Make compacting and seam such as original segregation in the steel ingot, loose, pore, slag inclusion, its tissue becomes tightr, has improved the 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.Said mounting groove is the rectangular recess that both sides connect, and said cutting teeth embeds in the said mounting groove, has increased the contact area of cutting teeth and layer of sand, and the cutting power of tack serrated knife is improved.Said cutting teeth adopts carbide alloy to process.Through the geologize survey report, high to the stratum quartz content, and the characteristics of the distance of working continuously, the cutting teeth in the present embodiment selects for use higher relatively, the anti-wear carbide alloy of 702 trades mark relatively preferably of hardness to process.Said cutting teeth and cutter hub are fixed together through welding manner, and carbide cutting tooth and cutter hub adopt middle and high frequency CO
2The compound weld tabs of copper silver of homemade copper base-material series and import is adopted in gas shield welding, scolder, and welding back close inspection and insulation are guaranteed the quality of cutter to eliminate welding stress.
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 said cutter hub, and said wear-resisting stake installing hole divides two rows to be provided with, and wherein first row is provided with four wear-resisting stake installing holes; Second row is provided with three wear-resisting stake installing holes, and the wear-resisting stake of said two rows installing hole shifts to install.Said 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 the cylinder.Fixed installation in the said wear-resisting stake installing hole is implanted in seven wear-resisting stakes respectively, and fixing mode can be welding, also can be riveted joint.The above part of dorsal horn face of cutter hub is exposed in said wear-resisting stake, and the height of promptly wear-resisting stake is 3～4mm.The periphery of the dorsal horn face of said cutter hub is provided with wear-resisting chimb 6, and the width of said wear-resisting chimb is 4～6mm, and the height of wear-resisting chimb is 4～6mm.Said wear-resisting chimb is higher than wear-resisting stake 1～2mm, prevents that wear-resisting stake from exposing and collapse or come off, and makes wear-resisting chimb play the certain protection effect to its inboard wear-resisting stake at the initial stage of shield-tunneling construction.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 convexities are set on the two sides of said cutter hub, said many wear-resisting convexities 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 for use is greater than 60HRC, and in the present embodiment, said wear resistant alloy material is a cast tungsten carbide.The height of said many wear-resisting convexities is 4～6mm, and the height of many wear-resisting convexities can be selected in the scope of 4～6mm, and most preferred height is 6mm.Said many wear-resisting convexities 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 prolonged the application life of tack serrated knife; Many wear-resisting convexities are set on the two sides of cutter hub, make two adjacent on the cutterhead of shield machine tack serrated knives, slowed down layer of sand, prolonged the application life of tack serrated knife directly to the wearing and tearing of cutter hub both sides along overlapping on the movement locus.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 said 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, because wearproof alloy weld rod built-up welding easy deformation and faint crackle is arranged on the cutter hub of steel work, thus need not full weld, and waste material; Replace the plane with mesh shape, effective more economically.
Reinforced tack serrated knife of the present invention can be installed on the EPB shield machine of extra large Rake company, on the cutterhead of this shield machine altogether configuration center twolip hobboing cutter 4, front and edge single-blade hobboing cutter 31, reinforced tack serrated knife 64, edge scraper 8,1 on the cutter of backbreaking.That is disposed 64 is contained in the tack serrated knife respectively on four auxiliarys of cutterhead, arrange on the same trajectories line two just two anti-communisms four participate in the tack serrated knife to cut.The layout and the installation of reinforced tack serrated knife belong to prior art, are not described in detail here.Use shield-tunneling construction of the present invention tunnel, layer of sand distributes more extensively in the horizontal direction, and distributed pole is inhomogeneous on the vertical direction, close slightly shape～in close shape, and quartz content is high.Most of crown in tunnel or full section face pass through layer of sand; Reach 540 meters continuously,, and pass through from the below of Airport Expwy for present domestic shield-tunneling construction passes through the longest section of layer of sand; It is dangerous big to change cutter during this time; Owing to possibly occur gushing at any time, do not allow replacing cutter under the normal pressure, difficulty of construction is very big.Because adjacent two tack serrated knives are for being provided with dorsad, when carrying out soil body cutting, layer of sand requires very high to the anti-wear performance of rear corner surface.
Facts have proved; Assemble the shield machine of reinforced tack serrated knife of the present invention and do not changing under the situation of cutter, the continuous layer of sand that has passed through to reach 540m of success, and continuous operation 610m; Wherein reinforced tack serrated knife wearing and tearing all between 4-7mm, belong to the normal wear scope.The tack serrated knife ensures together as the last of cutter head of shield machine, reduced the risk that cutterhead damages in layer of sand.
Simultaneously in wide Buddhist subway 10 marks, the driving that right line is successful 1100m, cutter hub is complete, wearing and tearing all between 3-8mm, genus normal wear scope, and do not change 1 serrated knife in the process.In wide Buddhist 10 mark stratum, the life-span of common serrated knife is 600-800m, and the life-span of reinforced tack serrated knife greater than 1100m, be equivalent to practice thrift 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 bigger, only direct cost is practiced thrift about 172800 yuan of RMB (disregard indirect expense: labour cost, electric power, duration etc.).
Claims (3)
1. a reinforced tack serrated knife comprises handle of a knife, cutter hub, and it is characterized in that: the head of said cutter hub is provided with mounting groove, the interior fixedly cutting teeth of said mounting groove, the notch edge build-up wear-resistant coating of said mounting groove; A plurality of wear-resisting stakes are set on the dorsal horn face of said cutter hub, and the top of said wear-resisting stake is a spherical shape, and its spherical radius is 5～7mm; The periphery of the dorsal horn face of said cutter hub is provided with wear-resisting chimb, and many wear-resisting convexities are set on the two sides of said cutter hub, and the height of said many wear-resisting convexities is 4～6mm.
2. reinforced tack serrated knife according to claim 1 is characterized in that: said many wear-resisting convexities are formed by the wear resistant alloy material built-up welding.
3. reinforced tack serrated knife according to claim 1 and 2 is characterized in that: build-up wear-resistant boss on the positive edged surface of said cutter hub, the height of said wear-resisting boss are 4～6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
|---|---|---|---|
| CN2011102116780A CN102392656B (en) | 2011-07-27 | 2011-07-27 | Reinforced serrated knife with flat head |
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| CN102392656A true CN102392656A (en) | 2012-03-28 |
| CN102392656B CN102392656B (en) | 2013-11-27 |
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| CN2011102116780A Active CN102392656B (en) | 2011-07-27 | 2011-07-27 | Reinforced serrated knife with flat head |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106216054A (en) * | 2016-08-30 | 2016-12-14 | 浙江华莎驰机械有限公司 | A kind of waste disposal combination particle toothing |
| 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 |
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| JP2002371782A (en) * | 2001-06-19 | 2002-12-26 | Toshiba Tungaloy Co Ltd | Boring bit |
| JP2006241681A (en) * | 2005-02-28 | 2006-09-14 | Shimizu Corp | Cutter bit and method of manufacturing cutter bit |
| 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 |
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2011
- 2011-07-27 CN CN2011102116780A patent/CN102392656B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002371782A (en) * | 2001-06-19 | 2002-12-26 | Toshiba Tungaloy Co Ltd | Boring bit |
| JP2006241681A (en) * | 2005-02-28 | 2006-09-14 | Shimizu Corp | Cutter bit and method of manufacturing cutter bit |
| 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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106216054A (en) * | 2016-08-30 | 2016-12-14 | 浙江华莎驰机械有限公司 | A kind of waste disposal combination particle toothing |
| 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 |
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| CN102392656B (en) | 2013-11-27 |
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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 |