CN201794592U

CN201794592U - Cutter of shield machine

Info

Publication number: CN201794592U
Application number: CN2010205497319U
Authority: CN
Inventors: 李伟; 王汉章; 魏俊伟; 李辉
Original assignee: LUOYANG JIUJIU TECHNOLOGY DEVELOPMENT Co Ltd
Current assignee: LUOYANG JIUJIU TECHNOLOGY DEVELOPMENT Co Ltd
Priority date: 2010-09-30
Filing date: 2010-09-30
Publication date: 2011-04-13
Anticipated expiration: 2020-09-30

Abstract

The utility model discloses a cutter of a shield machine. The cutter comprises a cutter body (1), a main blade (4) and an auxiliary blade (5); a step (6) and a U-shaped groove (7) are sequentially arranged on a top surface of the cutter body (1); the main blade is fixedly connected in the step, and the auxiliary blade is fixedly connected in the U-shaped groove and is higher than the top surface of the blade; and the cutter is characterized in that: the main blade has a rake angle theta in the range of between 5 and 12 degrees, a relief angle beta in the range of between 15 and 35 degrees, a main deflection angle in the range of between 8 and 20 degrees and an auxiliary deflection angle in the range of between 8 and 20 degrees. The cutter passes through a step hole positioned on the cutter through a connecting bolt and is rigidly and fixedly arranged on a cutter head of the shield machine; a main blade surface which consists of solid alloy blocks faces an excavated working face; the rational rake angle of the main blade facilitates smooth slagging; the rational relief angle greatly improves the impact resistance of the blades relative to sandy cobble strata; and the rational main and auxiliary deflection angles greatly reduces resisting moment when meeting strata with serious cementation; therefore, the cutter wear and the energy consumption are reduced.

Description

Shield machine cutter

Technical field

The utility model relates to shield machine accessory technical field, is specifically related to a kind of shield machine cutting knife.

Background technology

High speed development along with China's modernization economic construction, the construction of tunnel building cause that with the subway is representative just is surging forward, as underground warehouse, water conservancy hole letter, large-scale tunnel engineering construction such as highway, railway tunnel is more and more, and just increasing towards diameter, mileage direction more and more longer, that quality requirement is more and more higher develops, and these actual national conditions that are China has a large population and a few land determine.The shield driving construction method is widely used in the tunnel construction, and not only efficient height, safety are good for it, and economic environmental protection, be the optimal selection of modern tunnel engineering construction, and shield machine is the modern professional equipment of using in the shield driving construction method.Disk cutter and cutting knife are mounted in the dedicated tool that is used for rock cutting and soil layer on the cutter head of shield machine, they or aggregate erection or be arranged separately on the cutterhead and when constructing tunnel by in the injection rock soil layer, cutterhead is realized revolution under whirligig drives simultaneously, make hobboing cutter roll extrusion continuously on the rock soil layer, cutting knife continuous cutting and the fragmentation that dregs is peeled off in scraping of ditching continuously, therefore disk cutter and cutting knife are in shield machine and lithostratigraphy position, contacted forefront, the length in its life-span and the compliance of geological conditions become one of key factor that influences shield machine construction efficient.

Summary of the invention

Technical problem to be solved in the utility model provides a kind ofly has sufficient intensity, each basil of knife edge part is reasonable, abrasion resistance good and install and change the shield machine cutter parts that can adapt to complex geological condition easily.

For achieving the above object, the utility model adopts technical scheme as described below:

Shield machine cutter of the present utility model comprises cutter hub, major cutting edge and auxiliary blade, and described cutter hub end face has step and U type groove successively, and described major cutting edge connects firmly in step, and described auxiliary blade connects firmly in U type groove and exceeds the cutter hub end face; Described major cutting edge has the anterior angle θ of 5～12 degree scopes, the relief angle β of 15～35 degree scopes, the major-minor drift angle α of 8～20 degree scopes.

Be better implement the invention, described cutter hub is set to rectangle, and along the cutter hub width one row shoulder hole is set at least.

Further, the front end face of described cutter hub and rear end face are provided with wearing layer.

Further, described auxiliary blade is set at least one row.

Cutting knife described in the utility model rigidly fixes on the cutterhead that is installed to shield machine by the shoulder hole that connecting bolt passes on the cutter hub, partly face the face that excavates by the major cutting edge that hard alloy blocks is formed, when rotating, cutterhead revolves round the sun with cutterhead, the ploughshare of face as the arable land excavated out ring-shaped groove with face, the loosening fragmentation of carrying out is peeled off in the cutting of rock-soil layer; And the various blade anterior angles of cutting knife itself, relief angle and drift angle are reasonable, low cost of manufacture, and structural strength is reliable, and anti-wear performance is good, and impact resistance is big, changes easy accessibility in the tunnel, can effectively improve cutting knife application life.This is novel to be provided with rational anterior angle and to be convenient to smooth deslagging, reasonably relief angle comes lecture to improve the resistance to impact of blade greatly to sand-pebble layer, reasonably the major-minor drift angle can reduce the moment of resistance greatly when running into glued serious stratum, reduces tool wear and energy consumption.

Description of drawings

Fig. 1 is the structural representation of the utility model cutting knife;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is the A-A cut-away view of Fig. 2;

Fig. 4 is the structural representation of the utility model cutting knife cutter hub;

Fig. 5 is the structural representation of the utility model cutting knife major cutting edge;

Among the figure:

The 1-cutter hub; The 2-shoulder hole; The 3-wearing layer; The 4-major cutting edge; 5-assists blade; The 6-step; 7-U type groove.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is explained further, be it should be noted that the utility model is not limited to following embodiment, open the purpose of this utility model is intended to protect all changes and improvements in the utility model scope.

In conjunction with Fig. 1, Fig. 2 and Fig. 3, shield machine cutter of the present utility model, cutter hub 1 is set to rectangle, and the cutter hub width is provided with two row shoulder holes 2; The front end face of cutter hub 1 and rear end face are provided with wearing layer 3, and cutter hub 1 end face has step 6 and two U type grooves 7 successively, and wherein, the step of the front end face top of cutter hub and the end face of cutter hub forms the open type groove; Welding major cutting edge 4 in the open type groove, U type groove 7 welds auxiliary blade 5 respectively, and exceeds the cutter hub end face after 5 welding of auxiliary blade.Major cutting edge 4 has the anterior angle of 5～12 degree scopes, the relief angle of 15～35 degree scopes, the major and minor drift angle of 8～20 angular ranges.The purpose of She Zhiing like this, reasonably anterior angle is convenient to smooth deslagging, reasonably relief angle comes lecture to improve the resistance to impact of blade greatly to sand-pebble layer, and reasonably the major-minor drift angle can reduce the moment of resistance greatly running into glued serious stratum, reduces energy consumption and tool wear.

Cutting knife described in the utility model directly acts on rock or soil layer face as a crucial tool parts of shield machine driving excavation, by the continuous rotation of cutter head of shield machine, makes cutting knife continuously cut face, realizes continuous excavation operation.Its each part need according to technical requirement on design process respectively, through after the assay was approved, again through assembling and carry out special welding and heat treatment forms, specific implementation method is as follows:

The manufacturing of cutting knife cutter hub 1:

In conjunction with Fig. 4, carbon chrome-moly steel in the cutting knife cutter hub material selection is made blank through forging earlier, through mechanical roughing,, carry out machine finishing according to design drawing size and required precision then then again through heat treatment, be coated with coating rubbing-layer, treat the assembling welding through being up to the standards.

The making of major cutting edge:

In conjunction with Fig. 5, major cutting edge adopts toughness and all extraordinary Hardmetal materials manufacturing of abrasion resistance, earlier carry out the mould manufacturing by each basil that designs and size, carry out HTHP moulding and heat treatment again, process through mechanical grinding then, reach designing requirement, treat the assembling welding through being up to the standards.

Wherein, the manufacture process and the major cutting edge of auxiliary blade are similar, and this paper does not do tired stating.

The assembling of cutting knife:

In conjunction with Fig. 1, cutting knife cutter hub 1 and major cutting edge 4, auxiliary blade 5 are machined through after the assay was approved according to design drawing, assemble; At first with apolegamy good scolder and solder flux, major cutting edge 4, auxiliary blade 5 are welded with cutter hub 1, heat-treat then, clear up reconditioning at last, after the assay was approved, the related a kind of novel shield machine cutter manufacturing of the utility model is finished.

Claims

1. shield machine cutter, comprise cutter hub (1), major cutting edge (4) and auxiliary blade (5), described cutter hub (1) end face has step (6) and U type groove (7) successively, and described major cutting edge (4) connects firmly in step (6), and described auxiliary blade (5) connects firmly in U type groove (6) and exceeds the cutter hub end face; It is characterized in that: described major cutting edge (4) has the anterior angle θ of 5～12 degree scopes, the relief angle β of 15～35 degree scopes, the tool cutting edge angle α of 8～20 degree scopes, the auxiliary angle α of 8～20 degree scopes.

2. shield machine cutter according to claim 1 is characterized in that: described cutter hub (1) is set to rectangle, and along the cutter hub width one row shoulder hole (2) is set at least.

3. shield machine cutter according to claim 1 is characterized in that: the front end face of described cutter hub (1) and rear end face are provided with wearing layer (3).

4. shield machine cutter according to claim 1 is characterized in that: described auxiliary blade (5) is set at least one row.