CN109365912B

CN109365912B - Cutting mechanical device

Info

Publication number: CN109365912B
Application number: CN201811327714.8A
Authority: CN
Inventors: 王子芹
Original assignee: Suzhou Leying Technology Consulting Co Ltd
Current assignee: Suzhou Leying Technology Consulting Co., Ltd
Priority date: 2018-11-08
Filing date: 2018-11-08
Publication date: 2020-10-13
Anticipated expiration: 2038-11-08
Also published as: CN109365912A

Abstract

The invention discloses a building steel bar multi-group cutting mechanical device in the field of building cutting, which comprises an adjusting mechanism, a moving mechanism, a clamping mechanism and a cutting mechanism, wherein the adjusting mechanism comprises an operating platform, a motor is arranged on the outer side of the operating platform, a fixed plate and a threaded shaft are arranged in an inner cavity of the operating platform, the fixed plate is in threaded connection with the threaded shaft, a scale is arranged on the outer side of the operating platform, the moving mechanism comprises a mounting plate, the lower end of the mounting plate is fixedly connected with a supporting leg, the lower end of the supporting leg is provided with a walking wheel, the clamping mechanism comprises a supporting table, the upper end of the supporting table is provided with a fastening hoop, the inner side of the threaded rod is provided with a fastening plate, the cutting mechanism comprises a cutting frame, the. The portable steel bar cutting machine has the advantages that the whole structure is movable and portable, meanwhile, a plurality of groups of steel bars can be cut together, the fixing effect is good, and in addition, pollution caused by spark splashing can be effectively prevented during cutting.

Description

Cutting mechanical device

Technical Field

The invention relates to the field of building cutting, in particular to a multi-group cutting mechanical device for building steel bars.

Background

The construction industry is an industry that has developed around the design, construction, finishing, management of buildings. The urban building is an important part of the city, and the building is not only an artificial work for people to rest and entertain, but also is associated with the economy, culture and life in a large aspect. The building industry has a wide range, a large number of enterprises in the industry and low enterprise concentration of the industry. In many construction enterprises in China, only three or forty companies are listed, small enterprises, particularly contractors, are even countless, and only in this point, competition among the existing enterprises in the industry is strong enough, but competition projects or links among the enterprises are different due to different scales. It is considered that large-sized marketing companies compete mainly with the contract of large-sized projects such as real estate construction and infrastructure construction, and small-sized companies compete mainly with sub-industries such as architectural decoration or the like or subcontract projects of large-sized projects.

In the field of construction, building steel is often required for support in building construction. Construction steel materials can be generally classified into steel for steel structures and reinforcing steel for reinforced concrete structures. The steel for steel structure mainly comprises common carbon structural steel and low alloy structural steel. The varieties include section steel, steel pipes and reinforcing steel bars. The section steel comprises angle steel, I-shaped steel and channel steel. The steel bar for the reinforced concrete structure can be divided into the following steps according to the processing method: hot rolling steel bars, heat treating steel bars, cold drawing low carbon steel wires and steel stranded wires; can be divided into plain steel bars and screw threads according to the surface shape; according to the steel variety, the steel can be divided into low carbon steel, medium carbon steel, high carbon steel, alloy steel and the like. The reinforcing steel bars in China can be classified into five grades of I, II, III, IV and V according to the strength.

In a building, steel bars are often required to be cut according to actual building requirements, so that more and more related patents of steel bar cutting devices are disclosed, for example, the chinese patent with application number CN201711032224.0 discloses a steel bar cutting device with a steel bar section collecting box, which comprises a base, a sliding support seat, a steel bar right end fixing device, a steel bar cutting device, a steel bar left end fixing device, a control module and a straightening limiting device; the sliding support seat is fixed on the base; a sliding groove is formed in the middle of the upper end face of the sliding support seat; the right end fixing device of the steel bar is arranged on the right side of the upper end surface of the sliding support seat; the control module is arranged at the upper front part of the left end surface of the sliding support seat; the left end fixing device of the reinforcing steel bar is arranged on the sliding support seat in a left-right sliding manner; the steel bar cutting device is arranged on the sliding support seat in a left-right sliding manner and is positioned between the steel bar right end fixing device and the steel bar left end fixing device; a supporting blanking unit is arranged on the reinforcing steel bar right end fixing device; a rectangular frame-shaped collecting box is inserted into the containing groove from right to left. The invention fully automatically straightens and cuts the construction steel bar without manual intervention; the reinforcing bar section directly drops to the collection incasement after the cutting, makes things convenient for follow-up transportation.

However, the conventional steel bar cutting device has a single steel bar fixing structure and a poor fixing effect, and is inconvenient for cutting a plurality of groups of steel bars, so that the production efficiency of the steel bars is influenced; meanwhile, when the existing device is used for cutting, a protective cover is not arranged, cutting sparks are easy to splash, and pollution influence is caused; in addition, the cutting table is heavy in structure and inconvenient to move, and the practical practicability of portability is difficult to embody in the actual construction site.

Aiming at the problems, the invention designs a multi-group cutting mechanical device for construction steel bars, so as to solve the background problems.

Disclosure of Invention

The invention aims to provide a multi-group cutting mechanical device for construction steel bars, which aims to solve the problems that the conventional steel bar cutting device in the background technology has a single fixing structure and a poor fixing effect on the steel bars, and is inconvenient for cutting the steel bars, so that the production efficiency of the steel bars is influenced; meanwhile, when the existing device is used for cutting, a protective cover is not arranged, cutting sparks are easy to splash, and pollution influence is caused; in addition, the cutting table is heavy in structure and inconvenient to move, and the problem of portability and practicability is difficult to embody in an actual construction site.

In order to achieve the purpose, the invention provides the following technical scheme: a multi-group cutting mechanical device for construction steel bars comprises an adjusting mechanism, a moving mechanism, a clamping mechanism and a cutting mechanism, wherein the adjusting mechanism comprises an operating platform, a motor is arranged on the outer side of the operating platform, a chute is arranged at the upper end of the operating platform, a fixed plate and a threaded shaft are arranged in an inner cavity of the operating platform, the fixed plate is in threaded connection with the threaded shaft, a support column is fixedly arranged at the upper end of the fixed plate, a scale is arranged on the outer side of the operating platform, the moving mechanism comprises a mounting plate, a supporting leg is fixedly connected to the lower end of the mounting plate, a traveling wheel is arranged at the lower end of the supporting leg, a turntable is arranged on the outer side of the supporting leg, a connecting plate is rotatably connected to the turntable, a first, another group the fixture activity sets up in adjustment mechanism upper end, it includes a supporting bench to add the mechanism of holding, a supporting bench upper end is provided with the fastening hoop, both sides and the fastening hoop outside of supporting bench all are provided with the engaging lug, and are adjacent be provided with the second fluid pressure pole between the engaging lug, and rotate between second fluid pressure pole both ends through rotating pin and the engaging lug and be connected, fastening hoop transverse thread is connected with the threaded rod, the threaded rod inboard is provided with the mounting plate, cutting mechanism sets up between two sets of fixture, cutting mechanism is including cutting frame, cutting frame upper end is provided with the roof, the roof upper end is provided with the pneumatic cylinder, pneumatic cylinder lower extreme fixedly connected with actuating lever, actuating lever lower extreme fixedly connected with connecting plate, be provided with cutting blade on the connecting.

Preferably, sliding grooves are formed in two sides of an inner cavity of the operating platform, sliding rods are arranged on two sides of the fixing plate, and the sliding grooves are connected with the sliding rods in a sliding mode.

Preferably, one end of the threaded shaft is fixedly connected with the power output end of the motor, and the other end of the threaded shaft is rotatably connected with the inner cavity of the operating platform through a bearing.

Preferably, the walking wheel is of a universal wheel structure, and a foot brake is arranged on the walking wheel.

Preferably, the mounting panel passes through bolt and operation platform bottom demountable installation, the mounting panel bottom is provided with the iron sheet.

Preferably, the bottom of the first hydraulic rod is fixedly connected with a bottom plate, the lower end of the bottom plate is provided with a magnet, the magnet is in magnetic fit with an iron sheet, and a sucker is arranged at the bottom of the bottom plate.

Preferably, it is adjacent fastening hoop bottom is connected through pivot and host's platform rotation, the fastening hoop top all is provided with the connecting block, and adjacent fastening hoop top realizes fixed connection through connecting block and bolt cooperation.

Preferably, the threaded rod inboard is provided with the bearing, and the threaded rod inboard passes through the bearing and is connected with the mounting plate rotation, the fixed rotation handle that is provided with in the threaded rod outside, it is provided with the friction line to rotate the handle outward appearance.

Preferably, exhaust fans are arranged in two side walls of the cutting frame.

Preferably, a cutting motor is arranged in the connecting plate, and the power output end of the cutting motor is fixedly connected with the cutting blade.

Compared with the prior art, the invention has the beneficial effects that:

1. the integral movement is realized through the travelling wheel of the universal structure at the lower end of the moving mechanism, the fixing is realized by matching with the foot brake arranged on the travelling wheel, and meanwhile, the hydraulic rod capable of accommodating and lifting is arranged to match with the sucker at the bottom to realize the support and reinforcement of the whole body, so that the influence of overlarge vibration in the cutting process on the stability of the whole body can be effectively prevented;

2. the steel bar cutting device is provided with the adjusting mechanism, and the distance between the two groups of clamping mechanisms is adjusted by matching with a scale outside the adjusting mechanism through the driving of a motor, namely the cutting distance of the steel bars is adjusted according to the actual cutting requirement;

3. the clamping mechanism is arranged, two groups of fastening hoops are driven and adjusted by the hydraulic telescopic rod to realize fastening of a plurality of groups of reinforcing steel bars, and the fastening hoops are matched with manually adjusted fastening plates to carry out reinforcement, so that the number of the reinforcing steel bars to be cut at one time is increased, and the stability of the reinforcing steel bars during cutting is also increased;

4. the cutting mechanism is arranged to drive the cutting blade to cut through the hydraulic cylinder, the cutting frame can effectively prevent pollution and damage caused by spark splashing during cutting, and the exhaust fan can effectively reduce the temperature of the cutting mechanism during cutting and prevent the whole cutting machine from being damaged due to overhigh temperature.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front view of the perspective structure of FIG. 1 in accordance with the present invention;

FIG. 3 is a schematic view of the adjusting mechanism of FIG. 1 according to the present invention;

FIG. 4 is a cross-sectional view of the adjustment mechanism of FIG. 1 in accordance with the present invention;

FIG. 5 is a schematic view of the moving mechanism of FIG. 1 according to the present invention;

FIG. 6 is a schematic view of the clamping mechanism of FIG. 1 according to the present invention;

FIG. 7 is a schematic view of the cutting mechanism shown in FIG. 1 according to the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1-an adjusting mechanism, 11-an operating platform, 111-a sliding chute, 12-a motor, 13-a sliding chute, 14-a fixing plate, 141-a sliding rod, 15-a threaded shaft, 16-a supporting column, 17-a scale, 2-a moving mechanism, 21-a mounting plate, 211-an iron sheet, 22-a supporting leg, 23-a traveling wheel, 24-a rotating disc, 25-a connecting plate, 26-a first hydraulic rod, 261-a bottom plate, 262-a magnet, 3-a clamping mechanism, 31-a supporting table, 32-a fastening hoop, 321-a rotating shaft, 322-a connecting block, 33-a connecting lug, 34-a second hydraulic rod, 35-a rotating pin, 36-a threaded rod, 361-a rotating handle, 37-a fastening plate, 4-a cutting mechanism and 41-a cutting frame, 411-suction fan, 42-top plate, 43-hydraulic cylinder, 44-driving rod, 45-connecting plate, 46-cutting blade.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides a technical solution: a multi-group cutting mechanical device for construction steel bars comprises an adjusting mechanism 1, a moving mechanism 2, clamping mechanisms 3 and a cutting mechanism 4, wherein the adjusting mechanism 1 comprises an operating platform 11, a motor 12 is arranged on the outer side of the operating platform 11, a chute 13 is arranged at the upper end of the operating platform 11, a fixing plate 14 and a threaded shaft 15 are arranged in the inner cavity of the operating platform 11, the fixing plate 14 is in threaded connection with the threaded shaft 15, a supporting column 16 is fixedly arranged at the upper end of the fixing plate 14, a scale 17 is arranged on the outer side of the operating platform 1, the moving mechanism 2 comprises a mounting plate 21, a supporting leg 22 is fixedly connected to the lower end of the mounting plate 21, a travelling wheel 23 is arranged at the lower end of the supporting leg 22, a rotary table 24 is arranged on the outer side of the supporting leg 22, the rotary table 24 is rotatably, the other group of clamping mechanism 3 is movably arranged at the upper end of the adjusting mechanism 1, the clamping mechanism 3 comprises a supporting table 31, a fastening hoop 32 is arranged at the upper end of the supporting table 31, connecting lugs 33 are arranged on the two sides of the supporting table 31 and on the outer side of the fastening hoop 32, a second hydraulic rod 34 is arranged between the adjacent connecting lugs 33, the two ends of the second hydraulic rod 34 are rotatably connected with the connecting lugs 33 through rotating pins 35, a threaded rod 36 is transversely and threadedly connected with the fastening hoop 32, a fastening plate 37 is arranged on the inner side of the threaded rod 36, a cutting mechanism 4 is arranged between the two groups of clamping mechanisms 3, the cutting mechanism 4 comprises a cutting frame 41, a top plate 42 is arranged at the upper end of the cutting frame 41, a hydraulic cylinder 43 is arranged at the upper end of the top plate 42, a driving rod 44 is.

Wherein, the operation platform 1 has the slide groove 111 on both sides of the inner cavity, and the fixed plate 14 has the slide bar 141 on both sides, and the slide groove 111 is connected with the slide bar 141 in a sliding manner. One end of the threaded shaft 15 is fixedly connected with the power output end of the motor 12, and the other end of the threaded shaft 15 is rotatably connected with the inner cavity of the operating platform 11 through a bearing. The walking wheel 23 is of a universal wheel structure, and a foot brake is arranged on the walking wheel 23, so that the walking wheel is convenient to move integrally, and the integral portability is improved. The mounting plate 21 is detachably mounted with the bottom of the operating platform 1 through bolts, and an iron sheet 211 is arranged at the bottom of the mounting plate 21. First hydraulic stem 26 bottom fixedly connected with bottom plate 261, bottom plate 261 lower extreme are provided with magnet 262, magnet 262 and iron sheet 211 magnetic coordination, are convenient for to accomodating of bottom plate 261, and bottom plate 261 bottom is provided with the sucking disc, has increased the stability of whole support. The bottom of the adjacent fastening hoop 32 is rotatably connected with the host table 31 through a rotating shaft 321, the top of the fastening hoop 32 is provided with a connecting block 322, and the top of the adjacent fastening hoop 32 is fixedly connected with the bolt through the connecting block 322 in a matched mode. The inside of the threaded rod 36 is provided with a bearing, the inside of the threaded rod 36 is rotatably connected with the fastening plate 37 through the bearing, a rotating handle 361 is fixedly arranged on the outside of the threaded rod 36, and friction grains are arranged on the outer surface of the rotating handle 361, so that the threaded rod is convenient for a worker to hold. Two side walls of the cutting frame 41 are provided with exhaust fans 411. A cutting motor is arranged in the connecting plate 45, and the power output end of the cutting motor is fixedly connected with the cutting blade 46.

One specific application of this embodiment is: when the invention moves, the movement is realized through the universal traveling wheel 23 at the lower end of the supporting leg 22 at the bottom of the moving mechanism 2, and the fixing is realized by matching with a foot brake on the universal traveling wheel 23. Meanwhile, in order to prevent the influence on the overall stability caused by the excessive vibration during cutting, the turntable 24 can be rotated to separate the magnet 262 on the bottom plate 261 from the iron sheet 211 at the lower end of the mounting plate 21, the first hydraulic rod 26 is reused to drive the bottom plate 261 at the lower end to support the ground, and the suction cup arranged at the lower end of the bottom plate 261 is used for adsorbing the ground, so that the overall support and reinforcement are realized. It is flexible through second hydraulic stem 34, utilize pivot 321 to open two sets of fastening hoops 32, prevent a set of or multiunit reinforcing bar between the fastening hoop 32 of two sets of fixture 3 settings, it makes two sets of fastening hoops 32 closed to recycle second hydraulic stem 34, make connecting block 322 fixed connection of upper end through the bolt, it rotates handle 361 rotation threaded rod 36 rotation to rotate again, the pitch arc mounting plate 37 of drive front end realizes carrying out the centre gripping fixedly to the reinforcing bar, holistic stability when guaranteeing the reinforcing bar cutting. Before cutting, the cutting length can be observed through the scale 17 on the outer side of the adjusting mechanism 1, the starting motor 12 drives the threaded shaft 15 to rotate, the two ends of the fixing plate 14 are in limited sliding fit with the sliding grooves 111 on the two sides of the inner cavity of the operating platform 11 through the sliding rods 141, finally, the threaded shaft 15 drives the fixing plate 14 to move along the direction of the threaded shaft 15, and the fixing plate 14 drives the group of clamping mechanisms 3 at the upper end to move through the supporting columns 16, namely, the cutting length of the steel bar is adjusted according to actual cutting requirements. During the cutting, drive cutting blade 46 through exclusive cutting motor and rotate, recycle pneumatic cylinder 43 drive actuating lever 44 and descend, cut the reinforcing bar, and cutting frame 41 can effectively prevent the spark of cutting from splashing, and the air exhauster 411 of cutting frame 41 both sides can cool down cutting mechanism 4 with the air suction simultaneously, prevents that the high temperature from damaging whole production.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a construction steel bar multiunit cutting machine device, includes adjustment mechanism (1), moving mechanism (2), fixture (3) and cutting mechanism (4), its characterized in that: the adjusting mechanism (1) comprises an operating platform (11), a motor (12) is arranged on the outer side of the operating platform (11), a first sliding groove (13) is formed in the upper end of the operating platform (11), a fixing plate (14) and a threaded shaft (15) are arranged in the inner cavity of the operating platform (11), the fixing plate (14) is in threaded connection with the threaded shaft (15), a supporting column (16) is fixedly arranged on the upper end of the fixing plate (14), a scale (17) is arranged on the outer side of the operating platform (11), the moving mechanism (2) comprises a mounting plate (21), supporting legs (22) are fixedly connected to the lower end of the mounting plate (21), walking wheels (23) are arranged at the lower ends of the supporting legs (22), a rotary table (24) is arranged on the outer side of the supporting legs (22), the rotary table (24) is rotatably connected with a first connecting plate (25), and a first hydraulic rod (, the clamping mechanism (3) is provided with two groups, one group of the clamping mechanism (3) is fixedly arranged at the upper end of the adjusting mechanism (1), the other group of the clamping mechanism (3) is movably arranged at the upper end of the adjusting mechanism (1), the clamping mechanism (3) comprises a supporting table (31), a fastening hoop (32) is arranged at the upper end of the supporting table (31), connecting lugs (33) are arranged on both sides of the supporting table (31) and on the outer side of the fastening hoop (32), a second hydraulic rod (34) is arranged between the adjacent connecting lugs (33), both ends of the second hydraulic rod (34) are rotatably connected with the connecting lugs (33) through rotating pins (35), a threaded rod (36) is transversely connected with the fastening hoop (32) through threads, a fastening plate (37) is arranged on the inner side of the threaded rod (36), and the cutting mechanism (4) is arranged between the two groups of the, the cutting mechanism (4) comprises a cutting frame (41), a top plate (42) is arranged at the upper end of the cutting frame (41), a hydraulic cylinder (43) is arranged at the upper end of the top plate (42), a driving rod (44) is fixedly connected at the lower end of the hydraulic cylinder (43), a second connecting plate (45) is fixedly connected at the lower end of the driving rod (44), a cutting blade (46) is arranged on the second connecting plate (45), second sliding grooves (111) are formed in two sides of an inner cavity of the operating platform (11), sliding rods (141) are arranged in two sides of the fixing plate (14), the second sliding grooves (111) are in sliding connection with the sliding rods (141), one end of a threaded shaft (15) is fixedly connected with a power output end of a motor (12), the other end of the threaded shaft (15) is rotatably connected with an inner cavity of the operating platform (11) through, be provided with the service brake on walking wheel (23), mounting panel (21) pass through bolt and operation platform (11) bottom demountable installation, mounting panel (21) bottom is provided with iron sheet (211), first hydraulic stem (26) bottom fixedly connected with bottom plate (261), bottom plate (261) lower extreme is provided with magnet (262), magnet (262) and iron sheet (211) magnetic fit, bottom plate (261) bottom is provided with the sucking disc, and is adjacent fastening hoop (32) bottom is rotated with supporting bench (31) through pivot (321) and is connected, fastening hoop (32) top all is provided with connecting block (322), and adjacent fastening hoop (32) top realizes fixed connection through connecting block (322) and bolt cooperation, threaded rod (36) inboard is provided with the bearing, and threaded rod (36) inboard passes through bearing and mounting plate (37) rotation connection, a rotating handle (361) is fixedly arranged on the outer side of the threaded rod (36), friction grains are arranged on the outer surface of the rotating handle (361), exhaust fans (411) are arranged in two side walls of the cutting frame (41), a cutting motor is arranged in the second connecting plate (45), the power output end of the cutting motor is fixedly connected with a cutting blade (46), the cutting motor is moved through a universal traveling wheel (23) at the lower end of a supporting leg (22) at the bottom of the moving mechanism (2), and is fixed by being matched with a foot brake on the universal traveling wheel (23); meanwhile, in order to prevent the influence on the overall stability caused by excessive vibration during cutting, the turntable (24) can be rotated to separate the magnet (262) on the bottom plate (261) from the iron sheet (211) at the lower end of the mounting plate (21), the first hydraulic rod (26) is used for driving the bottom plate (261) at the lower end to support the ground, and the sucking disc arranged at the lower end of the bottom plate (261) is used for sucking the ground, so that the overall support and reinforcement are realized; the second hydraulic rod (34) stretches, the two groups of fastening hoops (32) are opened by the aid of the rotating shaft (321), one or more groups of steel bars are placed between the fastening hoops (32) arranged on the two groups of clamping mechanisms (3), the second hydraulic rod (34) is used for closing the two groups of fastening hoops (32), the connecting blocks (322) at the upper ends are fixedly connected through bolts, the rotating handle (361) is rotated to rotate the threaded rod (36), the front arc fastening plate (37) is driven to clamp and fix the steel bars, and overall stability during cutting of the steel bars is guaranteed; before cutting, the cutting length can be observed through a scale (17) on the outer side of the adjusting mechanism (1), the starting motor (12) drives the threaded shaft (15) to rotate, two ends of the fixing plate (14) are in limited sliding fit with second sliding grooves (111) on two sides of an inner cavity of the operating platform (11) through sliding rods (141), finally, the threaded shaft (15) drives the fixing plate (14) to move along the direction of the threaded shaft (15), the fixing plate (14) drives a group of clamping mechanisms (3) at the upper end to move through supporting columns (16), and the cutting length of the steel bar is adjusted according to actual cutting requirements; during the cutting, drive cutting blade (46) through exclusive cutting motor and rotate, recycle pneumatic cylinder (43) drive actuating lever (44) and descend, cut the reinforcing bar, and cutting frame (41) can effectively prevent the spark of cutting and splash, and air exhauster (411) of cutting frame (41) both sides can cool down cutting mechanism (4) with the air suction simultaneously, prevent that the high temperature from producing the damage to the whole.