CN115383216A

CN115383216A - Band sawing machine

Info

Publication number: CN115383216A
Application number: CN202210790008.7A
Authority: CN
Inventors: 吕俊; 吕丽楠; 王葛勇; 项坚冰
Original assignee: ZHEJIANG HUJIN MACHINE TOOL CO LTD
Current assignee: ZHEJIANG HUJIN MACHINE TOOL CO LTD
Priority date: 2022-07-06
Filing date: 2022-07-06
Publication date: 2022-11-25
Anticipated expiration: 2042-07-06
Also published as: CN115383216B

Abstract

The invention relates to the technical field of saw cutting equipment, in particular to a band sawing machine, which comprises a machine body, a saw band, two guide arms and a cleaning mechanism, wherein the saw band is rotatably arranged on the machine body; the cleaning mechanism comprises a mounting seat and two cleaning and scraping components arranged on the mounting seat, and the cleaning and scraping components can freely turn over around a rotating axis; the scraping component comprises scraping plates, the two scraping plates are arranged oppositely, one side, far away from the saw belt, of the scraping component is provided with a spray head used for spraying liquid, under the working state, the spray head sprays liquid to the scraping plates, the scraping plates are driven to overturn under the impact force of the liquid so that the end sides of the scraping plates abut against the side walls of the saw belt, and the scraping of the side walls of the saw belt is achieved. The water flow sprayed by the spray head enables the cleaning component to turn over, and the end side of the scraper blade is abutted against the saw belt, so that the scraps attached to the saw belt are scraped by the scraper blade, and the scraps are prevented from being brought into the guide block by the saw belt.

Description

Band sawing machine

Technical Field

The invention relates to the technical field of sawing equipment, in particular to a band sawing machine.

Background

The band sawing machine is widely applied to cutting of various workpieces as a high-efficiency cutting machine tool, such as long-axis metal parts and the like, and mainly realizes cutting of the workpieces by means of an annular saw band rotating on a machine body at a high speed.

For example, the invention with the application number of 201621284671.6 discloses a horizontal band sawing machine with a pressing mechanism, wherein a guide arm is arranged on a cross beam, a guide head is arranged at the bottom end of the guide arm, the guide head comprises a guide body, a bearing fixing mechanism is arranged on one side of the guide body, a double-row guide bearing is arranged on the bearing fixing mechanism, a saw belt penetrates through the guide bearing after passing through the guide body, and the saw belt is guided downwards by the guide body and the guide bearing to enable the saw cutting section of the saw belt to be kept in a vertical state.

The guide bodies are also generally called guide blocks and guide blades, and are generally made of alloy materials, and the guide bodies comprise two guide bodies which are arranged oppositely, a saw belt is clamped between the two guide blocks, so that the saw belt runs between the two guide blocks in a vertical state through the clamping of the two guide blocks, and the purpose of guiding is achieved, and for the guide blocks, reference is made to a saw belt guide head of a belt sawing machine disclosed by application number 201320668164.2.

The existing saw band machine can realize good guide for the saw band by arranging the guide block, but in actual use, the guide block is seriously abraded, and the main reasons are that firstly, the saw band is abraded by long-term friction with the guide block, and secondly, in the sawing process, some cutting waste chips attached to the saw band are brought into the guide block along with the saw band, so that the abrasion of the guide block is further increased; therefore, in order to reduce the cutting waste chips brought into the guide block, a spray head is usually arranged beside the saw blade, the saw band is washed by spraying water through the spray head, but the cleaning effect of the mode of washing only by spraying water is general, and some waste chips still can be adhered to the saw band, therefore, in the related technology, a scraper is arranged on the side of the saw band, and a spring is arranged, the scraper is kept in a state of being inconsistent with the saw blade through the spring so as to clean the saw blade through the scraper, although the waste chips can be well cleaned through the mode of cleaning the saw band through the scraper, the scraper always offsets with the saw band under the action of the spring, even in the state of stopping the saw band, the scraper can also offset with the saw band, which is equivalent to that the scraper is always in a stressed state, thereby the problem of bending deformation of the scraper is easier to occur, and the service life of the scraper is not favorable for the service life of the scraper.

Disclosure of Invention

In order to solve at least one technical problem mentioned in the background, an object of the present invention is to provide a band sawing machine.

In order to achieve the purpose, the invention provides the following technical scheme:

a band sawing machine comprises a machine body, a saw band and two guide arms, wherein the saw band is rotatably arranged on the machine body, the two guide arms are arranged on the machine body, one guide arm is positioned on the entering side of a saw blade, the other guide arm is positioned on the output side of the saw blade, the guide arms comprise guide heads for guiding the saw blade, the guide heads comprise two guide blocks which are oppositely arranged, the saw blade passes through the space between the two guide blocks, the band sawing machine further comprises a cleaning mechanism for cleaning the saw blade, and the cleaning mechanism is arranged on the inner sides of the guide blocks on the output side of the saw blade along the advancing direction of the saw blade; the cleaning mechanism comprises a mounting seat and two cleaning and scraping components arranged on the mounting seat, the cleaning and scraping components can freely turn over around a rotating axis, and the rotating axis is parallel to the side wall of the saw blade; the clear component of scraping includes the scraper blade, and two scraper blades set up relatively, the saw area passes through between two scraper blades, two it all is equipped with the shower nozzle that is used for spraying liquid to scrape one side that the component kept away from the saw area clearly, the spraying direction orientation of shower nozzle is towards the scraper blade that corresponds with it, under the operating condition, the shower nozzle sprays liquid to the scraper blade, orders about the scraper blade upset so that the distolateral conflict of scraper blade is in realize scraping the clear of the lateral wall of saw area on the lateral wall of saw area under the impact force of liquid.

Compare prior art, the advantage of this scheme of adoption lies in:

in this scheme, including the clean component and the shower nozzle of scraper blade through setting up, so at the during operation, the shower nozzle is to scraper blade jet liquid (for example coolant liquid or clear water etc.), shower nozzle spun rivers can produce a great impact force to the scraper blade, make clean component overturn, final clean component can make the side conflict of scraper blade on the saw band after the upset, so the saw band is convenient for constantly by the scraper blade clear scraping at the continuous operation in-process, thereby will adhere to sweeps on the saw band through the scraper blade and strike off, prevent that the saw band from bringing these sweeps into the guide block.

It is worth explaining, the produced conflict power of scraper blade derives from the rivers impact force of shower nozzle in this scheme, so as long as the shower nozzle lasts the water spray, the scraper blade just can offset with the saw band lateral wall all the time, and in case shut down the shower nozzle and stop the water spray, the scraper blade just no longer receives the impact force of rivers, just can not take place relative conflict with the saw band, be equivalent to the scraper blade at this moment and no longer receive the effect of external force, just can not take place easily and buckle deformation, so than traditional mode that utilizes the spring to provide the conflict power to the scraper blade, the life that is more favorable to the scraper blade undoubtedly.

Furthermore, shower nozzle water spray not only can play and provide the effect of conflict to the scraper blade in this scheme, and shower nozzle spun water will be clearly scraped the in-process and attach to the sweeps on the scraper blade and wash away along the scraper blade to can improve the clear effect of scraping of scraper blade.

Preferably, a rotating shaft is fixedly arranged on the mounting seat, the scraping member is rotatably arranged on the rotating shaft by taking the central axis of the rotating shaft as a rotating axis, a water channel is arranged in the rotating shaft, and the rotating shaft is provided with a water inlet communicated with the water channel; the peripheral wall of the rotating shaft is provided with a water outlet communicated with the water channel, the spray head is arranged on the rotating shaft, and the spray head is communicated with the water outlet.

Preferably, the water channel and the water outlet both extend along the axial direction of the rotating shaft, and the spray head is a flat nozzle spray head.

Preferably, the scraping member further comprises a turning plate and an installation frame, the turning plate freely rotates around the rotation axis, the installation frame is arranged on the turning plate, and the scraping plate is detachably installed on the installation frame.

Preferably, the mounting frame comprises a connecting part for connecting the scraper and at least two guide rods fixed with the connecting part, the guide rods are movably arranged in the turning plate in a penetrating manner and can move between a first position and a second position along a direction perpendicular to the rotation axis, the connecting part is accommodated in the mounting seat and is closed with the turning plate at the first position, and the connecting part is positioned outside the mounting seat at the second position; the turning plate and the top of the connecting part are relatively fixed through a vertically arranged locking bolt; the top of the mounting seat is provided with an operation hole penetrating through the top wall of the mounting seat; when the turning plate is turned to the assembling position and the guide rod is at the first position, the locking bolt is axially aligned with the operation hole.

Preferably, a positioning piece for abutting against the turning plate is fixedly arranged in the mounting seat or on the spray head, and when the turning plate abuts against the positioning piece, the turning plate is positioned at the assembling position.

Preferably, the top of the turning plate is provided with a first jack, and the top of the connecting part is provided with a second jack, wherein the second jack is a screw hole structure matched with the locking bolt; in an assembly state, the locking bolt is screwed into the second jack and then inserted into the first jack.

Preferably, the first and second receptacles are axially aligned when the mounting bracket is abutted against the side wall of the flap on the opposite side; or the top of the turning plate is provided with a notch, the first jack is arranged in the notch, the top of the connecting part is provided with a convex part extending towards one side close to the notch, the second jack is arranged on the convex part, and when the front end wall of the convex part is abutted against the front end wall of the notch, the first jack and the second jack are axially aligned.

Preferably, the connecting portion includes a side portion extending in the vertical direction, the scraper is attached to the bar portion by a plurality of screws, and the plurality of screws are spaced apart in the vertical direction.

Preferably, the mounting seat comprises two oppositely arranged side plates, and the spray head and the scraping member are positioned between the two side plates

Other advantages and effects of the invention are specifically set forth in the detailed description section.

Drawings

FIG. 1 is a schematic view of the present invention showing the position of the guide arm;

FIG. 2 is a cross-sectional view at the cleaning mechanism;

FIG. 3 is a schematic view of the cleaning mechanism;

FIG. 4 is a schematic view of the interior of the mounting base;

FIG. 5 is a partial schematic view of the mount with the guide bar in a second position;

FIG. 6 is a schematic view of the cleaning member with the guide bar in a second position;

FIG. 7 is a schematic view of the internal structure of the flap;

fig. 8 is an axial sectional view of the rotating shaft.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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. 1-8, the present embodiment provides a band sawing machine, as shown in fig. 1, which mainly includes a machine body (not shown), a saw band 1 rotatably disposed on the machine body, and two guide arms 2 disposed on the machine body, wherein the saw band 1 is in a ring structure, the saw band 1 is mounted on two transmission wheels on the machine body, the two transmission wheels rotate to drive the saw band 1 to rotate, and a saw segment is formed between the two guide arms 2 under the guidance of the two guide arms 2.

Along the advancing direction of saw blade, two guiding arms 2 one is located the saw blade and gets into the side, and another is located the output side of saw blade, as shown in fig. 1, saw area 1 is clockwise rotation, and the part of saw area 1 between two guiding arms 2 is the direction of turning from the right side to the left this moment, and the right side is the saw blade and gets into the side this moment, and the left side is the saw blade output side.

As shown in fig. 1 and fig. 2, the guide arm 2 includes a guide head 21 for guiding the saw blade, the guide head 21 includes two guide blocks 211 arranged oppositely, a gap for the saw band 1 to pass through is formed between the two guide blocks 211, and in operation, the saw blade passes through the gap between the two opposite guide blocks 211, so that the saw band 1 is clamped by the two guide blocks 211, and it is ensured that the saw band 1 does not deflect when rotating.

It can be understood that, as shown in fig. 1, in the present embodiment, the guide head 21 further includes two rotating bearings 212 arranged side by side, and the two rotating bearings 212 are located outside the guide block 211, and it should be noted that here, the outside refers to a side where the two guide heads 21 are far away from each other, whereas a side opposite to the two guide heads 21 is referred to as an inside.

In order to clean the saw band 1 before the saw band 1 enters the left guide block 211, so as to prevent the saw band 1 from bringing cutting waste chips into the guide block 211, in this embodiment, the band sawing machine further includes a cleaning mechanism for cleaning the saw blade, and the cleaning mechanism is disposed inside the guide block 211 located on the output side of the saw blade, that is, inside the left guide block 211, along the advancing direction of the saw blade, as shown in fig. 1.

The cleaning mechanism comprises a mounting seat 4 and two scraping members arranged on the mounting seat 4, the mounting seat 4 can be mounted on the guide head 21 or the guide arm 2, and is not limited in particular.

As shown in fig. 2-6, the scraping member can be freely turned around a rotation axis L parallel to the side wall of the saw blade, specifically, as shown in fig. 2 and 3, two vertically arranged rotation shafts 5 are fixed in the mounting seat 4, and the two scraping members are respectively mounted on the two rotation shafts 5, so that the scraping member rotates with the central axis of the rotation shaft 5 as the rotation axis L.

As shown in fig. 2 and 4, the scraping member includes two scraping plates 31, the two scraping plates 31 are disposed opposite to each other, the saw band 1 passes between the two scraping plates 31, spray heads 32 for spraying liquid are disposed on both sides of the scraping members away from the saw band 1, and the liquid sprayed by the spray heads 32 may be a liquid medium such as cooling liquid, cutting liquid, or clean water, which is not limited in this respect.

The spraying direction of the spray head 32 faces the corresponding scraper 31, and in a working state, the spray head 32 sprays liquid to the scraper 31, and the scraper 31 is driven to overturn under the impact force of the liquid so that the end side of the scraper 31 is abutted against the side wall of the saw band 1 to clean the side wall of the saw band 1.

As a preferred embodiment, as shown in fig. 2, the scraper 31 extends in an inclined state in a state where the scraper 31 is in contact with the saw band 1, an angle α between an end side of the scraper 31 and a side wall of the saw band 1 is in a range of 30 ° to 80 °, and the spray head 32 sprays water to the scraper 31 substantially along an inclined direction of the scraper 31. As shown in fig. 2, the solid arrows indicate the spraying direction of the spray heads 32, and the hollow arrows indicate the running direction of the saw band 1.

Through the arrangement, taking the spray head 32 spraying clear water as an example, when the saw blade cleaning device works, the spray head 32 spraying water flow to the scraper 31, the water flow sprayed by the spray head 32 can generate a large impact force on the scraper 31 to drive the cleaning member to turn over, and finally the end side of the scraper 31 can be abutted against the saw belt 1 after the cleaning member is turned over, so that the state shown in fig. 2 is formed; the saw belt 1 is thus scraped by the scraping blade 31 during continuous operation, so that the scraping blade 31 scrapes off the scraps attached to the saw belt 1, and the saw belt 1 is prevented from bringing the scraps into the guide block 211.

It can be known from the above-mentioned process, the conflict power that scraper blade 31 produced in this scheme (conflict power here refers to the power that scraper blade 31 and saw area 1 lateral wall looks butt) derives from the rivers impact force of shower nozzle 32, so long as shower nozzle 32 lasts the water spray, scraper blade 31 just can offset with saw area 1 lateral wall all the time, so in case shut down shower nozzle 32 and stop the water spray, scraper blade 31 no longer receives the impact force of rivers, just can not take place relative conflict with saw area 1, be equivalent to scraper blade 31 no longer receive the effect of external force this moment, do not have the existence of interference power, so scraper blade 31 is difficult for taking place buckling deformation, so compare traditional mode that utilizes the spring to provide interference power to scraper blade 31, undoubtedly, be more favorable to scraper blade 31's life.

Furthermore, shower nozzle 32 water spray in this scheme not only can play and provide the effect of conflict to scraper blade 31, and shower nozzle 32 spun water will be clearly scraped the in-process and attached to the sweeps on scraper blade 31 and wash away along scraper blade 31 to can improve scraper blade 31 clearly scrape the effect.

The structure of the mount 4 is: as shown in fig. 3 and 5, the mounting seat 4 includes a top plate 42 and two opposite side plates 41, the spray head 32 and the scraping member are located between the two side plates 41, and the water sprayed from the spray head 32 can be limited from being widely splashed to both sides by the two side plates 41.

In order to realize the water supply to the spray head 32, in the embodiment, as shown in fig. 2 and 8, the rotating shaft 5 has a water channel 51 inside, and the rotating shaft 5 is provided with a water inlet 53 communicated with the water channel 51; a water outlet 52 communicated with the water channel 51 is formed in the peripheral wall of the rotating shaft 5, the spray head 32 is mounted on the rotating shaft 5, and the spray head 32 is communicated with the water outlet 52. Therefore, only the water pump is used for pumping water, the water outlet end of the water pump is communicated with the water channel 51, at the moment, the water is pumped into the water channel 51 and then is discharged into the spray head 32 through the water outlet 52, and finally is sprayed to the scraper 31 through the spray head 32.

Through setting up water course 51 in pivot 5 and installing shower nozzle 32 on pivot 5 in this scheme, so design can be so that the structure is more compact, make full use of the space.

In order to increase the spraying area of the spray head 32, in this embodiment, as shown in fig. 6 and 8, the spray head 32 is a flat nozzle spray head, the length of the nozzle of the spray head 32 extends along the axial direction of the rotating shaft 5, and the corresponding water channel 51 and the water outlet 52 extend along the axial direction of the rotating shaft 5.

In this embodiment, as shown in fig. 4 and 6, the scraping member further includes a turning plate 33 and a mounting bracket 34, the turning plate 33 freely rotates around the rotation axis L, specifically, ear plates 54 are respectively disposed on the upper portion and the lower portion of the turning plate 33, the turning plate 33 is rotatably disposed on the rotating shaft 5 through the ear plates 54, and the mounting bracket 34 is disposed on the turning plate 33.

Since the end side of the blade 31 (i.e., the end abutting the saw band 1) is easily worn out during long-term use, and the blade 31 needs to be replaced if the wear is serious, the blade 31 is detachably mounted on the mounting bracket 34 in the present embodiment, for example, the blade 31 is mounted on the mounting bracket 34 by screwing.

In practical applications, the scraper 31 and the mounting bracket 34 are located at the mounting seat 4, and the space inside the mounting seat 4 is relatively small, so that it is difficult to attach and detach screws in the mounting seat 4 by a screwdriver, and therefore, the present embodiment is further improved to attach and detach screws connecting the scraper 31 and the mounting bracket 34, so as to attach and detach the scraper 31.

In this embodiment, as shown in fig. 6, the mounting frame 34 includes a connecting portion 341 for connecting the scraper 31 and at least two guide rods 342 fixed to the connecting portion 341, the connecting portion 341 includes a side portion 341a extending in the vertical direction, the scraper 31 is mounted on the bar portion by a plurality of screws, the plurality of screws are distributed at intervals in the vertical direction, and the scraper 31 and the side portion 341a can be connected more stably by the plurality of screws.

The guide rod 342 is movably disposed through the turning plate 33 and can move between a first position and a second position along a direction perpendicular to the rotation axis L, specifically, as shown in fig. 7, a channel 333 for the guide rod 342 to move is disposed in the turning plate 33 at a position corresponding to the guide rod 342, the channel 333 is disposed along a direction perpendicular to the rotation axis L, one end of the guide rod 342 is fixed on the connecting portion 341, and the other end of the guide rod 342 is inserted into the channel 333.

Of course, in order to prevent the guide rod 342 from being removed from the channel 333 when the guide rod 342 is pulled out, in this embodiment, a stopper 342a is provided at one end of the guide rod 342 located in the channel 333, and a stop step 333a is provided at the mouth of the channel 333, so that the stopper 342a is stopped by the stop step 333a, and the guide rod 342 is prevented from being pulled out.

In the first position, referring to the states shown in fig. 3 and 4, the connecting portion 341 is accommodated in the mounting seat 4 and is closed with the turning plate 33; in the second position, as can be seen in fig. 5 and 6, the connection portion 341 is outside the mounting seat 4; thus, when the scraper 31 needs to be replaced, the guide rod 342 can be pulled to the second position, and the screw connection position of the connection portion 341 and the scraper 31 is located outside the mounting seat 4, so that the screw can be assembled and disassembled by the screwdriver without being limited by the interference of the mounting seat 4.

As shown in fig. 4 and 6, the flap 33 and the top of the connecting portion 341 are fixed to each other by a vertically disposed locking bolt 6, specifically, the top of the flap 33 has a first insertion hole 332, and the top of the connecting portion 341 has a second insertion hole 343a, where the second insertion hole 343a is a screw hole structure adapted to the locking bolt 6; the locking bolt 6 is screwed into the second insertion hole 343a and then inserted into the first insertion hole 332, so that the flap 33 and the connecting portion 341 are connected together, and the connecting portion 341 and the scraper 31 cannot move relative to the flap 33, as shown in fig. 4.

In the present embodiment, as shown in fig. 3, the top of the mounting seat 4 has an operation hole 40 penetrating through the top wall of the mounting seat 4, since the connection portion 341 and the scraper 31 are required to be firstly pulled out from the mounting seat 4, so that the locking bolt 6 connecting the turning plate 33 and the connection portion 341 is required to be firstly screwed up to be pulled out from the first insertion hole 332, and in the assembled state, the locking bolt 6 is in the mounting seat 4, and the screwdriver cannot operate the locking bolt 6 in the mounting seat 4; when the flap 33 is turned to the assembly position and the guide rod 342 is in the first position, the locking bolt 6 is axially aligned with the operation hole 40, so that when the locking bolt 6 needs to be pulled out of the first insertion hole 332, the flap 33 can be first turned to the assembly position, the operation hole 40 and the locking bolt 6 are just axially aligned, namely, the operation hole is positioned right above the locking bolt, so that a screwdriver can be vertically inserted downwards from the top of the operation hole 40, finally, the screwdriver bit can be inserted into the notch at the head end of the locking bolt 6, and thus, the screwdriver can be rotated to move the locking bolt 6 upwards until the locking bolt is pulled out of the first insertion hole 332.

In order to enable the turning plate 33 to be turned to the assembling position accurately, in the embodiment, as shown in fig. 4 and fig. 6, the positioning element 7 for abutting against the turning plate 33 is fixedly installed on the spray head 32, and of course, in other alternative embodiments, the positioning element 7 may also be installed on the inner wall of the installation seat 4; when the flap 33 is against the positioning element 7, said flap 33 is in the assembly position. In this way, as soon as the flap 33 is turned over against the securing element 7, it is indicated that the locking bolt 6 has fallen directly below the actuating opening 40.

In order to align the first insertion hole 332 and the second insertion hole 343a when they are butted, as shown in fig. 6, in this embodiment, the top of the flap 33 has a cutout 331, the first insertion hole 332 is disposed in the cutout 331, the top of the connecting portion 341 has a protrusion 343 extending to a side close to the cutout 331, the second insertion hole 343a is disposed on the protrusion 343, and when a front end wall 343b of the protrusion 343 abuts against a front end wall 331a of the cutout 331, the first insertion hole 332 and the second insertion hole 343a are axially aligned.

In other alternative embodiments, the first and

second receptacles

332, 343a are axially aligned when the mounting bracket 34 is against the side wall of the flap 33 on the opposite side; both of the above manners can achieve the alignment of the first insertion hole 332 and the second insertion hole 343 a.

In order to better understand the technical solution, the following description will be made in detail on the replacement process of the scraper 31:

first, the flap 33 is turned by hand or by a tool until it abuts against the positioning element 7, whereupon the flap 33 is in the assembly position in which the locking bolt 6 is in direct axial alignment with the actuating opening 40.

Then, a screwdriver is inserted from the top of the operation hole 40 from top to bottom to penetrate through the operation hole 40 to be abutted with the locking bolt 6, then the screwdriver is rotated to enable the locking bolt 6 to continuously move upwards until the locking bolt 6 is disengaged from the first insertion hole 332, at this time, the locking bolt 6 does not form a connecting effect on the turning plate 33 and the connecting portion 341 any more, so that the connecting portion 341 can be pulled and pulled relative to the turning plate 33, and it is worth mentioning that in the process again, the locking bolt 6 still stays in the second insertion hole 343a and moves together with the connecting portion 341.

Then, the connecting portion 341 is pulled outward by hand or tool until the connecting portion 341 is completely located outside the mounting seat 4, and the screws of the connecting scraper 31 and the connecting portion 341 are located outside the mounting seat 4, at this time, the screws can be directly detached one by using a screwdriver, new scrapers 31 are replaced, and the screws are reused for locking.

Then, the connecting portion 341 is pushed into the mounting seat 4 again until the connecting portion 341 cannot be pushed further, at this time, the front end wall of the protrusion 343 abuts against the front end wall of the cutout 331, and the first insertion hole 332 and the second insertion hole 343a are axially aligned.

Finally, the turning plate 33 is turned over again to enter the assembling position, the screwdriver is inserted into the operation hole 40 again until the screwdriver is connected with the locking bolt 6, and then the screwdriver drives the locking bolt 6 to rotate so as to be continuously inserted into the first insertion hole 332, so that the replacement is completed.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. A band sawing machine comprises a machine body, a saw band and two guide arms, wherein the saw band is rotatably arranged on the machine body, the two guide arms are arranged on the machine body, one guide arm is positioned at the entering side of a saw blade and the other guide arm is positioned at the output side of the saw blade along the advancing direction of the saw blade, the guide arms comprise guide heads for guiding the saw blade, the guide heads comprise two guide blocks which are oppositely arranged, and the saw blade passes through the space between the two opposite guide blocks; the cleaning mechanism comprises a mounting seat and two cleaning and scraping components arranged on the mounting seat, the cleaning and scraping components can freely turn over around a rotating axis, and the rotating axis is parallel to the side wall of the saw blade; the clear component of scraping includes the scraper blade, and two scraper blades set up relatively, the saw area passes through between two scraper blades, two it all is equipped with the shower nozzle that is used for spraying liquid to scrape one side that the component kept away from the saw area clearly, the spraying direction orientation of shower nozzle is towards the scraper blade that corresponds with it, under the operating condition, the shower nozzle sprays liquid to the scraper blade, orders about the scraper blade upset so that the distolateral conflict of scraper blade is in realize scraping the clear of the lateral wall of saw area on the lateral wall of saw area under the impact force of liquid.

2. The band sawing machine according to claim 1, wherein a rotating shaft is fixedly arranged on the mounting seat, the scraping member is rotatably arranged on the rotating shaft by taking a central axis of the rotating shaft as a rotating axis, a water channel is arranged in the rotating shaft, and the rotating shaft is provided with a water inlet communicated with the water channel; the peripheral wall of the rotating shaft is provided with a water outlet communicated with the water channel, the spray head is arranged on the rotating shaft and is communicated with the water outlet.

3. The band saw machine according to claim 2, wherein the water channel and the water outlet both extend in the axial direction of the rotating shaft, and the nozzle is a flat nozzle.

4. The band sawing machine according to claim 1, wherein the scraping member further comprises a turning plate and a mounting frame, the turning plate freely rotates around the rotation axis, the mounting frame is arranged on the turning plate, and the scraping plate is detachably mounted on the mounting frame.

5. The band sawing machine according to claim 2, wherein the mounting bracket comprises a connecting portion for connecting the scraper and at least two guide rods fixed to the connecting portion, the guide rods are movably inserted into the turning plate and can move between a first position and a second position along a direction perpendicular to the rotation axis, the connecting portion is retracted into the mounting seat and closed to the turning plate in the first position, and the connecting portion is located outside the mounting seat in the second position; the turning plate and the top of the connecting part are relatively fixed through a vertically arranged locking bolt; the top of the mounting seat is provided with an operation hole penetrating through the top wall of the mounting seat; when the turning plate is turned to the assembling position and the guide rod is at the first position, the locking bolt is axially aligned with the operation hole.

6. A band sawing machine according to claim 5, characterized in that a positioning element against which the flap abuts is fixedly mounted in the mounting seat or on the nozzle, and the flap is in the assembly position when the flap abuts against the positioning element.

7. The band sawing machine according to claim 5, wherein the top of the turning plate is provided with a first jack, the top of the connecting part is provided with a second jack, and the second jack is a screw hole structure matched with the locking bolt; in the assembling state, the locking bolt is screwed into the second jack and then inserted into the first jack.

8. A band saw machine according to claim 7 wherein the first and second sockets are axially aligned when the mounting bracket is located against the side wall of the flap on the opposite side; or the top of the turning plate is provided with a notch, the first jack is arranged in the notch, the top of the connecting part is provided with a convex part extending towards one side close to the notch, the second jack is arranged on the convex part, and when the front end wall of the convex part is abutted against the front end wall of the notch, the first jack and the second jack are axially aligned.

9. A band saw machine according to claim 5, wherein said connecting portion includes a vertically extending lip, and said scraper is mounted on the bar portion by a plurality of screws spaced vertically apart.

10. A band saw machine according to claim 1, wherein said mounting base comprises two oppositely disposed side plates, said spray head and said scraping member being located between said side plates.