CN85105562A - Flail type pipe cutter - Google Patents

Abstract

The present invention be a flail type pipe cutter it have an elongated cutting head and with a common round cutter sheet do the circle to circumscribed movement locus, a device that drives this cutting head, and one be used for flexible axle that cutting head and whirligig are coupled together.A circular saw flank of tooth is arranged on this circular shear blade, and form two cutting teeths.In addition, this cutting head also has a head portion, in order to increase cutting teeth for being cut the bump strength that tube inner wall applies.The present invention is a kind of rapid pipe cutting machine, because its little diameter makes it can conveniently make a circulation to pass recessed by internal diameter and some pipes restriction that neck bush causes.

Description

Flail type pipe cutter

The interior caliber pipe cutter of mode work is whipped in a kind of employing of this invention narration.

The narration of prior art:

Interior caliber pipe cutter is well-known in the prior art.Prevailing a kind of like this cutting machine includes and a pair ofly prolongs axle against cutting knife and extend the cutting knife of the symmetry of its length.During operation, the cutting machine of this form is put into pipe lightly and is gone cutting, and cutting knife prolongs axle firmly to be wedged in the cutting knife by axial trough, and this moment, cutting machine began to rotate.The cutting mode of this cutting machine is the same simple with the can opener that average family is used.Producing a pressure stable when there, workpiece rotates with respect to cutting knife makes cutting knife cut tube wall.

General this in the caliber pipe cutter can provide satisfied result in many instances, some problem has but appearred when pipe cutter that this mode designs cuts pipe for the acquisition sample cell in the nuclear energy steam boiler.For example, for the internal diameter of inspection by sampling pipe around the gripper shoe of steam boiler inwardly recessed, perhaps, tube interior be prevent seepage have neck bush the time, adopt traditional interior caliber pipe cutter just can not be smoothly by because the restriction that internal diameter is inwardly recessed or lining is caused in pipe.If the direction that addresses this problem just will reduce the width of this cutting machine, it can slip over this restriction so.Its mechanical strength but will reduce, and will be worn or scrap after some pipes of cutting.The another one problem in addition that the caliber pipe cutter interrelates in planting therewith, that tube wall that just is to use this cutting machine to cut off pipe needs long clipping time.When cutting sample pipe from a nuclear energy steam boiler, this problem is especially sharp-pointed.In this active environment,,, will be exposed among the radiation for a long time so carry out the personnel of this kind operation because this cutting machine needs long clipping time.

Thereby, be that its cross section will be small enough to slip over because the restriction that recessed song and bushing pipe cause in pipe for the requirement of an interior caliber pipe cutter, its mechanical strength does not fracture even as big as cutting tube wall or wearing and tearing too much again simultaneously.Except wish volume little and durable wish also whether it can cut the tube wall that will cut pipe rapidly so that the operating personnel of nuclear energy steam boiler work are exposed to the dosage minimum of radiation.We wish that simplicity of design is arranged, use easily, and the cheap a kind of pipe cutter of cost.

This invention has been summarized with cutting head the inwall of a pipeline has been imposed the equipment that the mode whipped is cut, and above-mentioned cutting head, and above-mentioned equipment includes:

A) elongated cutting head, it has a longitudinal axis, can do the circumscribed action of garden shape by a kind of garden shape cutting edge.Blade has a zigzag mouth like this, to form two cutting teeths;

B) device that above-mentioned cutting head is always rotated round above-mentioned axle.

C) flexible axle, its end is connected on the above-mentioned cutting head, and the other end is connected on the above-mentioned whirligig, makes above-mentioned cutting head round above-mentioned longitudinal axis rotation.When above-mentioned whirligig rotates, therefore when cutting, whip above-mentioned side opposite by above-mentioned cutting blade.

What Xu Shu optimum implementation was said herein is a kind of equipment, and it is the inwall that is used for cutting such as the pipeline of pipe.This equipment generally includes the elongated cutting head with a cutting blade, a kind of device that is used for rotary cutting head, and in order to connect a kind of flexible axle of whirligig and the first end of cutting.In cutting head was inserted into pipe, whirligig made the cutting head rotation by flexible axle, and the cutting blade on the cutting head is effectively whipped around inner-walls of duct, and method is cut it thus.

The cutting blade of this equipment must include a zigzag mouth, and it is to be again in order to make the cutting blade rotation time force rotation to depart from the central axis of cutting head and to form a kind of eccentric motion mode in order to form a pair of cutting teeth.In addition, cutting head must include a head portion that is positioned at cutting blade top.When flexible axle makes cutting blade rotate to form a garden shape when whipping track, can increase the bump strength of cutting edge in pipeline.Whip movement locus normally in order to form, the size of garden shape blade diameter can be between cutting bore size about 75% to 95%.Best, garden shape cutting edge diameter be internal diameter of the pipeline about 82% to 86% between.

In addition, the flexible axle of this equipment also must be fenced up by a flexible shaft protecting, and this flexible shaft protecting can prevent cutting head displacement vertically when cutting operation of equipment, so that garden shape cutting edge can whipped same place, promptly form a garden circle clearly, finally be cut off up to tube wall at inner-walls of duct.In addition, this equipment in the invention also need comprise an adjustable positioner that Cylinder constituted with a plurality of dog screws.So that the fixing position of cutting head upper cutter sheet, be located at the pipe that will cut along the y direction desired position.At last, the equipment of this in the invention also must comprise a motor apparatus, and its output shaft is to be connected on the flexible axle of cutting head.The cutting head that this motor also must have the rotation of making surpasses 15,000 rev/mins ability.And a handle also is housed in the rear end of motor apparatus, before beginning cutting, can make cutting head adjust its position easily like this.

From the narration of following most preferred embodiment, from given example and as follows to this invention understood in detail in conjunction with the accompanying drawings.

Figure 1A and 1B are the side views of the part section of an embodiment of apparatus of the present invention.

Fig. 2 is the vertical view of cutter in the most preferred embodiment of this invention.

Fig. 3 is the partial cut away side views of whipping cutting head in pipe.The cutting mode of whipping in order to the cutting edge of explanation on cutting head.

Referring now to Figure 1A, 1B and 2, wherein identical digitized representation identical parts, it is by the end at flexible axle 31 cylindricality cutting head 3 other ends, common garden to be housed to connect high speed electric motor 52 that the most preferred embodiment of this pipe cutter 1 is formed, preferably this flexible axle is wrapped up by gooseneck type axle sleeve 33, and this point hereinafter will discuss in more detail.In addition, pipe cutter 1 includes an adjustable positioner 37, and it has a Cylinder, and this Cylinder relies on dog screw 45a, 45b, 45c can moving axially along axle sleeve 33.The general work mode of this positioner 37 is to adjust its axial location to make the cutting head 3 of pipe cutter 1 go cutting in the y direction insertion pipe of pipe.

Turn back to Figure 1A and 2 now, the cutting head 3 of pipe cutter 1 includes a Cylinder head portion 5, and there is an inclined-plane 7 on its top, as shown in the figure.Also have an end portion 9 and a connecting axle 11 to constitute so that the dismounting between the tail end of flexible axle 31 and the cutting head 3 with connect.It is not shown in the figures that connecting axle 11 has a central configuration chamber 13().The tail end of flexible axle 31 is inserted in the central configuration chamber.Connecting axle 11 also disposes a pair of six side's screw 15a and 15b to be securely fixed in the end of aforesaid central configuration chamber 13 in flexible axle 31.As end top portion 5, the end face of end portion 9 equally preferably also has an inclined-plane 17.Be positioned at cutting head 3 end portion 9 directly over be central taper part 19.Best, this taper part 19 merges to a neck part 21 that is shaped as Cylinder.A garden shape cutting edge 23 is configured between Cylinder neck part 21 and top part 5 of cutting head 3, as shown in the figure.Garden shape cutting edge 23 is emphasis for the operation of cutting head 3.It requires garden shape blade 23 to do garden shape to circumscribed movement locus and perpendicular with the rotation of Cylinder cutting head 3.This device can guarantee that when electro-motor 52 fast rotational the cutting rotational trajectory of garden shape cutting edge 23 can form a thinner garden to the inwall of pipe or other pipeline, and this point is narration more later on.Should be noted that a bit that in addition that is compared with internal diameter pipe cutter of the prior art exactly, the blade 25 of garden shape cutting edge 23 is more blunt from profile, and it constitutes an about angle of 60 ℃.Yet the angle that blade 25 is limited at broad has in fact but improved robustness and durability widely for cutting edge 23.Such specific character is even more important for the pipe cutter 1 in this invention, because its cutting mode mainly depends on the bump component of whipping motion with cutting head 3.Yet the blade 25 of garden shape cutting edge 23 also can be become a narrower angle by grinding gradually.This sharp keen blade tends to cause too much wearing and tearing, is not exactly by blunt by chipping, and this also depends on the relative fragility or the flexibility of the material that uses when making.In this optimum implementation, all parts of cutting head 3 are all made with same M-3 tool steel integral body, and the Rockwell hardness of this tool steel is greatly between 60 to 65.

Garden shape blade 23 preferably has an independent serrated face 27, as shown in the figure.Referring now to Fig. 2, this serrated face 27 has three critical functions at least.The first, it has formed the cutting teeth 29a and the 29b of a pair of symmetry, in fact, drives cutting heads 23 by electro-motor 52 and all puts together on to cutting teeth at this at cutting force that tube wall rotates and produced during shake.The second, to sharp mouth the component motion of whipping of the cutting head 3 that produces owing to cutting head 3 beating between the inwall 75 of pipe 72 has been strengthened by serrated face 27 formed these.Partly pressed partially as the wheel of same train, by zigzag partly 27 form this sharp mouth is hindered easy motion.Between the inwall of cutting edge 23 and pipe 72, constantly close and rotating.The 3rd function that serrated face 27 is risen is the pivot center that it little by little has been offset cutting head 3, just produced an eccentricity component for rotatablely moving of cutting head 3 thus.The centrifugal component of this motion that is produced by serrated face 27 is playing an important function to cutting head 3 towards the motion of whipping of the inwall of pipe 72, because cutting head 3 reversals of the natural order of things here are in pipe 72, rather than upwards inserts pipe from the bottom of opening.Therefore, in the previous case, when electro-motor began to start, cutting head 3 can not contact with the inwall of pipe 72.Guarantee that cutting head 3 begins to whip towards the inwall of pipe 72 immediately and wave, and needn't go to consider the directionality of motor 52 position that cutting head 3 is located when beginning to start in pipe 72 by the off-centre that serrated face 27 is provided.In brief, because a pair of cutting teeth 29a, 29b are provided on cutting head 3, produced the condition of an off-centre simultaneously, so, strengthened the component of whipping of motion during rotation greatly, thereby made serrated face 27 increase the cutting efficiency of cutting edge 23 in its inwall 75 shake facing to pipe 72.

The result who has serrated face 27 these measures on common garden shape cutting edge 23 is that cutting head 3 adopts when cutting the inwall of pipe 72 to beat and becomes overlapping open-work at last at a series of overlapping grooves and make pipe 73 by a kind of like this mode of final cutting.The working method of flexible axle pipe cutter forms sharp contrast in this cutting mode and the prior art.In the prior art cutting machine this be just to rely on centrifugal action when rotating garden shape cutting edge at a slow speed and being garden Zhou Yundong to the tube wall of pipe 72, the cutting mode of the can opener of using with average family is identical substantially.Owing to mention the importance of whipping component in this invention, top partly 5, and cutting edge 23 and neck partly 21, and their normal diameter scope just become very important, as the material of selecting cutting head 3.

The top of cutting head 3 partly 5 plays two important function.The first, between the blade 25 of above-mentioned cutting head 3 and garden shape cutting edge 23 motion whip component significantly increased making a concerted effort of machinery owing to exist the quality of end top part 5.The motion of the more complicated of cutting head 3 makes our the just very difficult quality that is illustrated as what top part 5 quantitatively can increase the gross efficiency of the blade cutting of cutting edge 25 in pipe 72, if possible, the applicant believes partly 7 fairly make this garden shape cutting edge 23 approach " centre of percussion " or approach by the terminal partly second moment of 2 determined Cylinder quality in cutting head 3 and flexible axle 31 axle sleeves 33 junctions of top.

Second kind of function that end top portion 5 is provided is when cutoff edge 25 is cut fully and penetrated tube inner wall 75, and it helps the otch " to turning up " of pipe.With reference to the very easy understanding of this function of Fig. 3.Know among this figure and find out that this cutting has begun sight, the upper end of the top part 5 of cutting head 3 will be positioned at the place of the inwall 75 on the cutting edge 23 and close with it in pipe 72.Therefore, around impact force that the cutting head 3 at inwall 75 places of pipe 72 is generated and centrifugal component are distributed to the edge of two new pipe opening parts that form owing to cutting equably.But if the top of cutting head 3 part 5 does not exist, the impact force of these power and centrifugal component all are added to around the new pipe opening part edge that cuts off of this section that is positioned under cutting edge 25 positions individually so.These power will cause the new opening part of this pipe to turning up.Because these pipes pass the hole of one or several gripper shoe in a variety of steam generators, so the pipe opening of this cut-out makes us be difficult to this new pipe that cuts off is pulled out from these holes to the part of turning up.Therefore, preventing that otch is on this point of turning up, the effect of end top part 5 is very important, and especially in view of such fact, pipe cutter 1 of the present invention has sufficient ability to cut one fully to be used for the pipe of nuclear energy steam boiler and to have only 1 second clipping time even still less.

Illustrate most preferred embodiment by Fig. 1.When the length L 1 of cutting head 3 was 6.35 centimetres, top partly 5 length L 2 was 1.42 centimetres.Majority think that L2 is that about 22% o'clock of L1 is the most desirable, and L2 is that about 12% to 32% of L1 is feasible although the applicant believes.

Since the impact force of active force also with cutting edge 23, the top partly 5 and neck partly 21 diameter is relevant, at length discuss with regard to the concrete size of these parts in this most preferred embodiment below.

Illustrate with Fig. 3, the external diameter of cutting edge 23 should be small enough to make cutting head 3 can occur whipping motion naturally, it also should be sufficiently big simultaneously, comes to be converted into the bump and the centrifugal force of cutting pipe effectively providing by motor to rotatablely move so that these cutting head 3 common Cylinders have enough quality on the whole.If it is it is too big that the diameter D1 of cutting edge 23 compares with the inside diameter D 3 of pipe 72, then too little and can not be effectively clashing into a groove on the inwall of pipe 72 or cutting this pipe by the land angle of serrated face 27 formed cutting teeth 29a and 29b.In other words, the outer diameter D 1 of common garden shape blade 23 with respect to the inside diameter D 3 of pipe 72 become big more, the constraint of then " axle sleeveization " of cutting edge 23 (" journalled ") will get more and more, there the inwall of pipe 72 and cutting teeth 29a, the 29b approximate bump occasionally that can provide for 75 of the inwalls of pipe 72.On the other hand, if the outer diameter D 1 of cutting edge 23 is too little with respect to the inside diameter D 3 of pipe 72, then cutting head 3 do as a whole will not possess have enough quality effectively rotatablely moving of high-speed motor 52 to be changed into cutting to whip motion.The generation of this shortcoming be since the top partly the neck of 7 diameter D2 and cutting head 3 partly 21 always than the little result of cutting edge diameter D1.Because the quality of concrete parts 5 and 21 is square proportional with their radiuses separately, so it is very clear, a little decline for these concrete parts radius ratios all can make quality produce very big influence, and influences the cutting efficiency of cutting edge 23 therefrom.The applicant is according to finding when cutting head is made by M-3 tool steel the observation of experiment, if the inside diameter D 3 of pipe 72 is 1.65 centimetres then cutting edge diameter D1 can be between 1.33 centimetres to 1.65 centimetres.In other words, the span of cutting edge diameter D1 the inside diameter D 3 of pipe 72 81% to 88% between.Though it all is feasible that the applicant believes the excursion of this broad between 73% to 95%.The applicant also finds by experiment, for internal diameter is this pipe of 1.65 centimetres, the top partly 7 and the diameter of neck part 21 should between 0.889 centimetre to 1.02 centimetres (in other words ips D3 51% to 62% between) though the applicant believes that once more in the scope of this broad between about 40% to 90% all be feasible.

Referring now to Figure 1A and 1B, pipe cutter 1 is to adopt the skin of flexible axle 31 wrapping the method that a gooseneck type axle sleeve 33 couples together cutting head 3 and electro-motor 52.In this most preferred embodiment, flexible axle 31 and diameter of axle sleeve 33 formations are 1/4th inches flexible axle apparatus system, it can buy (Flex-Shaft Division of Calco Manufacturing from being located at Ai Disheng city, Illinois flexible axle branch of Clarke manufacturing limited company, Inc., of Addison, Illinois.) axle sleeve 33 has the fixedly critical function of flexible axle 31, moves in order fully to eliminate any additional the whipping along pipe 72 y directions that causes owing to cutting head 3 when cutting.If this axle sleeve 33 is not set then flexible axle 31 will be along the y direction flutter of pipe 75, the result makes the cutoff edge 25 of cutting head 3 cut the circle of a thick wide garden post shapes from pipe 72 inwalls 75, rather than goes cutting along a thin narrow garden arc on tube wall 75.Best, flexible shaft protecting 33 connects partly 56 from axle and extends up to always and approximately be no more than 1 inch place apart from the inclined-plane 17 of cutting knife head 3.A traditional protection ring seat 35 preferably is set in order to can the not wear and tear opening portion of pipe 75 of the edge of guaranteeing the axle sleeve 33 that electric gooseneck type screw is formed around the tail end near the axle sleeve 33 of cutting head 3, perhaps makes the edge of high neck formula screw not unclamp.

In addition, also comprised an adjustable positioner 37 in the most preferred embodiment 1 so that determine the position of the cutting edge 23 of cutting head 3 along pipe 72 y directions.This adjustable positioner 37.Comprise a Cylinder 39, it has a garden shape outer wall 40, for the ease of holding, a knurled outer surface 41 is arranged on garden shape outer wall 40.Axle sleeve 33 is not shown by a center configuration chamber 43(figure who is arranged in Cylinder 39) pass.In Cylinder 39 residing positions on axle sleeve 33 y directions is by dog screw 45a, and 45b and 45c fix.Axle sleeve 33 can freely slip over the center configuration chamber 43 in the aforementioned location Cylinder 39 when these dog screws loosen.And when these set screws 45a, 45b and 45c tightened, Cylinder 39 just was fixed on the y direction that is locked in axle sleeve 33 certain a bit.

Now Figure 1B specifies, and the motor apparatus 50 in this optimum implementation generally includes the electro-motor 52 of a concrete output shaft, and this output shaft is to be connected with flexible axle 31 among being positioned at axle sleeve 33 by jockey 56.This motor apparatus 50 also comprises an inner casing 58 and the shell 60 with Cylinder 62 in addition.Electro-motor 52 and inner casing 58 can drive output shaft from one and obtain with 1.5 horsepowers the motor of having of about 25,000 rev/mins speed rotation in this most preferred embodiment.For example, cat. no is NO.9HT1749, and the 1.5hp. motor is at state, Chicago, Illinois Sears, Nuo Yibuke company (Sears, Roebuck; Co.of Chica go Illinois) makes, and it just can be used for replacing electro-motor 52 and inner casing 58.The shell of the motor that can buy on a kind of like this market is eaily to the Cylinder 62 that adopts a pair of set bolt 70a, 70b to load onto a shell 60.Front at shell 60 preferably also is provided with a front panel 64, with set bolt 57a, 57b axle connector 56 is assembled up on it.At last, the Cylinder 62 of this shell comprises a rear board 66, and it has a handle 68, is to move this whole pipe cutter 1 for the ease of the operator with hand.

When operation, operating personnel unscrew set screw, 45a, 45b on the Cylinder 39 of adjustable positioning device 37, choose the desired position on pipes 72, along axle sleeve 33 slip Cylinders 39, the distance between the garden of the garden of Cylinder 39 shape outer wall 40 and cutting head 3 shape cutting edge 23 meets pipe 72 Cutting Length desired positions.Then, operating personnel are with the openend of cutting head 3 insertion pipes 72, and the upper surface that makes cutting head 3 upwards make a circulation to advance up to garden shape outer wall 40 in pipe 72 contacts with the opening part of pipe 72.The size of the garden shape cutting blade diameter D1 of best selected cutting head 3 can successfully slip over conditional position among the inner diameter D3 of pipe 72, these restriction sites be because ips recessed or since liner sleeve cause.At last, when pipe cutter 1 is chosen the position, operating personnel's starter 52.Illustrational as Fig. 3, blade 25 beginnings of cutting edge 23 are harmonious with the inwall 75 of pipe 72, and apply a power that includes bump component and centrifugal component round a thin narrow garden arc.Narrated as the front, the cutting head 3 of this cutting machine 1 has the ability of the penetrable inconel pipe tube wall that uses in about 1 second in the nucleon steam boiler, (prolong clipping time by about 4 seconds although this pipe cutter 1 also has cutting and blocks an ability that is filled with the inconel pipe of water.What is interesting is that the applicant observes the start-up time that calculates electro-motor by experiment, whether penetrate fully, do totally unnecessary like this so that obtain the inwall of pipe 72.The applicant finds to whip cutting head and cause the clearly different Ka Lakala sounds in pipe 72 after tube wall is cut off.The applicant finds preferably not trust the cutting cycle after motor 52 starts; To turn off motor 52 more convenient on the contrary but rely on this different sound.

Claims (17)

1, a kind of cutting equipment, it comprises a cutting head and cuts a side opposite with the motion of whipping of above-mentioned cutting head that the said equipment includes:

(a) elongated cutting head, it has a longitudinal axis, uses a kind of common garden shape cutting blade to do the circumscribed action of garden arc, and this cutting edge has a zigzag face, to form two cutting teeths;

(b) device that above-mentioned cutting head is always rotated round above-mentioned axle,

(c) axle of a softness, its end is connected on the above-mentioned cutting head, and the other end is connected on the above-mentioned whirligig, makes cutting head rotate round the longitudinal axis.

When whirligig pivots, whip the inwall of pipeline by the cutting teeth of cutting head.

2, at a kind of device described in the claim 1, wherein cutting head is substantially a Cylinder, and the external diameter of cutting edge is bigger than the external diameter of cutting head.

3, at a kind of device described in the claim 2, wherein cutting head comprise a head portion and an end portion and endways part be connected with above-mentioned flexible axle.

4, at a kind of device described in the claim 3, wherein cutting edge can make cutting head do garden shape to circumscribed movement locus in a zone of cutting head.This zone is more approaching above-mentioned head portion compared with above-mentioned end portion.

5, at a kind of device described in the claim 3, wherein above-mentioned cutting edge can make above-mentioned cutting head do garden shape to circumscribed movement locus on a position.If it is this position is counted from the head portion of cutting head, big in about 12% to 32% scope of cutting head length.

6, at a kind of device described in the claim 4, wherein above-mentioned pipeline is a kind of pipe, and the size of cutting head external diameter is about 40 to 90% the scope of internal diameter size of the pipe that is cut.

7, at a kind of device described in the claim 4, wherein above-mentioned pipeline is a kind of pipe, and the size of cutting head external diameter is about 50 to 80% the scope of internal diameter size of the pipe that is cut.

8, at a kind of device described in the claim 4, wherein above-mentioned pipeline is a kind of pipe, and the size of the external diameter of cutting head is about 51 to 62% the scope of internal diameter size of the pipe that is cut.

9, at a kind of device described in the claim 6, wherein the diameter of garden shape cutting edge is littler than the internal diameter that is cut pipe, and comparing with the internal diameter size that is cut pipe approximately is its 95%.

10, at a kind of device described in the claim 6, wherein the diameter of garden shape cutting edge is compared greatly the scope about 90% to 78% with the ips size that is cut.

11, at a kind of device described in the claim 6, wherein the diameter of garden shape cutting edge is compared greatly the scope about 81% to 88% with the size of the internal diameter of the pipe that is cut.

12, at a kind of device described in the claim 9, wherein cutting edge can make cutting head do garden shape to be in a kind of like this position when circumscribed movement locus, it be positioned at by cutting head near near " center of impact, and the tail end of flexible axle of definite Cylinder quality.

13, at a kind of device described in the claim 10, wherein cutting edge can make cutting head do garden shape to be in a kind of like this position when circumscribed movement locus, it be positioned at by cutting head definite Cylinder quality " near the center of impact, and near the tail end of flexible axle.

14, at a kind of device described in the claim 11, wherein cutting edge can make cutting head do garden shape to be in a kind of like this position when circumscribed movement locus, it be positioned at by cutting head near the center of impact of definite Cylinder quality, and near the tail end of flexible axle.

15, at a kind of device described in the claim 1, one of them installs it is in order to drive above-mentioned cutting head and to rotate above-mentioned flexible axle with the speed that is not less than 15,000 rev/mins.

16,, comprised that also a flexible shaft protecting is in order to parcel and the above-mentioned flexible axle of localized immobilization at a kind of device described in the claim 1.

17, at a kind of device described in the claim 1, wherein cutting edge is by the M-3 tool steel processing and manufacturing of Rockwell hardness in 60 to 65 scopes.

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