CN107262820B - Sawing machine convenient for sawing valve body material section - Google Patents

Abstract

The invention relates to a sawing machine convenient for sawing a valve body material section, which comprises a saw disc, a saw rack, a fixing frame, a driving mechanism, an automatic filing mechanism, a chip removing mechanism, an oiling mechanism and an extension workbench, wherein the saw rack comprises a sawing section and a twisting section which are positioned at the lower part, a horizontal section which is positioned at the upper part, the automatic filing mechanism is arranged on the fixing frame and sequentially performs filing on saw teeth passing through the horizontal section, the chip removing mechanism is positioned below the twisting section and is close to the chip discharging end part of the sawing section, the oiling mechanism is positioned at the rear of the automatic filing mechanism and can perform oiling protection on the surface of the saw rack after filing, and the extension workbench is positioned at the outer end part of a sawing platform and can support a material rod which can overflow the sawing platform. During sawing, the invention sweeps the scraps adhered to the saw rack, and simultaneously ensures that the end face after sawing is arranged in parallel with the saw blade of the sawing section; when the saw is not saw cut, the file teeth of the saw teeth and the maintenance of the saw tooth strips are realized on the premise that the saw tooth strips do not need to be taken down.

Description

Sawing machine convenient for sawing valve body material section

Technical Field

The invention belongs to the field of sawing machines, and particularly relates to a sawing machine convenient for sawing a valve body material section.

Background

As is well known, sawing machines can be classified into circular sawing machines, band sawing machines and hacksawing machines, and for valve body casting industry, the sawing machines mainly saw the whole material rod into a plurality of sections, obviously, the circular sawing machines and the hacksawing machines are not suitable, and the band sawing machines are very common.

Currently, a band sawing machine comprises a base, a sawing platform, a locating clamp, a band saw rack and a driving mechanism for driving the band saw rack to saw a material rod, wherein the saw is cut into segments through chip processing of the material rod by the saw rack.

However, during actual operation, it has the following drawbacks:

1) When sawing is finished, particularly when the saw tooth bar is in a bump, the saw tooth bar is required to be taken down from the sawing machine and then the file teeth are carried out, so that the operation is very tedious and inconvenient.

2) Because in sawing, need guarantee the lubrication and the cooling of saw rack, consequently, the sawtooth strip is in moist state all the time, and so, a lot of piece adhesion is on the sawtooth, if not in time clear away remaining sawdust, will directly influence saw cutting efficiency and effect, still remain in saw dish frame simultaneously easily, causes saw cutting back piece's clearance work very complicated and loaded down with trivial details.

3) Because the size of the sawing platform is limited, once the end part of the bar section to be cut extends out of the sawing platform, the end surface is sawn to the end, and the end surface is an inclined surface due to the loss of support, so that the waste of the inclined section is caused, and the end surface is further ground or subjected to flatness processing, so that the working intensity is increased, and meanwhile, the cost is increased.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide an improved sawing machine which is convenient for sawing the valve body material section. When sawing, the scraps adhered to the saw rack can be swept along with the movement of the saw rack, and the brushing range and force can be adjusted at any time, so that the scraps remained on the saw rack are thoroughly cleared before entering the saw disc frame, the sawing efficiency and effect are further ensured, the scraps are convenient to clean after sawing, in addition, the material rod suspending out of the sawing platform can be movably adjusted and supported on the premise of being flush with the upper surface of the sawing platform, the end face after sawing is ensured to be parallel to the saw blade of the sawing section, the subsequent grinding work is reduced, and the cost is reduced; on the other hand, when not saw cutting, under the premise of not taking down the sawtooth strip, the file teeth of the sawtooth and the maintenance of the sawtooth strip are realized, the operation is very convenient, the structure is simple, and the cost is low.

In order to achieve the above purpose, the invention provides a sawing machine convenient for sawing a valve body material section, which comprises two saw discs horizontally arranged on the axial lead at the left side and the right side, a saw rack wound on the saw discs, a fixing frame arranged between the two saw discs, and a driving mechanism for driving the saw discs to rotate, wherein the saw rack comprises a sawing section and a twisting section which are arranged at the lower part, and a horizontal section which is arranged at the upper part, the driving mechanism can be switched between a stepping type and a continuous type, and when the teeth of the saw is filed, the driving mechanism is in a stepping type; when being in to saw cut, actuating mechanism is continuous type, and the sawing machine still includes setting up on the mount and carrying out the automatic file serration mechanism of file tooth to the sawtooth through the horizontal segment in proper order, be located the below of twisting section and be close to the anti-chip mechanism of the bits tip of saw cut section, be located the rear of automatic file serration mechanism and can carry out the oiling mechanism of oiling protection with the serration strip surface after the file grinds, and be located saw cut the extension workstation that the outer tip of platform can support the material stick that impoves saw cut the platform.

Preferably, the anti-dandruff mechanism comprises a support rod with one end fixed on the fixed frame and the other end extending towards the adjacent saw disc; a hanging arm with an upper end part movably hung at the other end part of the supporting rod through a connecting piece; a brush disc positioned at the bottom of the hanging arm and close to the saw rack; the brush hair is arranged on the periphery of the brush disc and can brush away the scraps adhered on the saw tooth bar, wherein the brush disc synchronously rotates around the horizontal axis direction under the driving of the movement of the saw tooth bar.

Further, the connecting piece includes the screw rod of from bottom to top wearing out branch, rotates the nut that sets up on branch and with screw rod assorted, and wherein through adjusting nut rotation, screw rod up-and-down motion, link arm upper end connection is in the screw rod bottom.

According to a specific embodiment and preferred aspect of the present invention, a connecting portion is provided at the bottom of the screw, and an upper end portion of the arm is swingably provided on the connecting portion.

Preferably, the connecting piece further comprises a tension spring with two ends connected to the connecting part and the hanging arm.

Preferably, the connecting piece further comprises a limit nut which is positioned below the supporting rod and matched with the screw rod.

According to still another specific embodiment and preferred aspect of the present invention, the bristles are made of steel wires and have a diameter of 0.56-2.0 mm.

Specifically, the diameter of the steel wire is 1.2mm.

Preferably, one end of the wire is fixedly arranged on the brush disc, and the other end extends outwards along the radial direction of the brush disc.

Meanwhile, the brush disc is connected with the hanging arm through a connecting shaft and a bearing; the supporting rod is horizontally arranged.

According to a specific implementation and preferred aspect of the present invention, the automatic rasp serration mechanism comprises a stand extending horizontally from one side of a holder, a rasp bar movably arranged on the stand in a vertical direction above the serrations of the saw rack, a driving unit for driving the rasp bar to move in a movement stroke after the rasp bar is reset after the rasp bar completes one movement stroke, wherein the rasp bar is rasped with the aligned serrations after the rasp bar completes one movement stroke.

Preferably, the driving unit and the driving mechanism are respectively communicated with a central control system of the sawing machine, and when the driving mechanism drives the saw teeth to move further back and forth, the driving unit starts to move and enables the file to reset after completing one movement stroke.

Preferably, the driving unit comprises a connecting rod connected to the upper end of the file strip, and a telescopic rod with two ends respectively connected to the connecting rod and the bracket, wherein the telescopic rod is arranged in parallel with the file strip and is communicated with (electrically communicated with) the central control system. The telescopic rod can be driven electrically, pneumatically or hydraulically.

Preferably, the file strip has many, and just sets up side by side, and the connecting rod is fixed connection mutually with the upper end of many file strips.

Preferably, there are a plurality of telescopic rods and the telescopic movement is synchronized.

According to yet another specific and preferred aspect of the present invention, the automatic rasp tooth mechanism further includes an oiling mechanism located on one side of the rasp bar and capable of oiling and rust preventing the horizontal section of the saw rack or/and the lower surface.

Preferably, the oiling mechanism is located at the rear of the file bar, the saw rack firstly passes through the file teeth and then is oiled, the oiling mechanism comprises oiling units located at the upper side and the lower side of the saw rack, the oiling units comprise a shell with a cavity inside and oil absorption cloth filled in the cavity, the oil absorption cloth is coiled into a cylinder, and the part contacted with the saw rack is scattered from the end of the cylinder to the periphery to form a cloth shape.

Preferably, the shell is also provided with an oil feeding pipeline communicated with the cavity.

In addition, the oiling units located above and below can be arranged upside down. In general, the upper shell is filled with oil, and the main reason is that part of oil after wiping is stored in the lower shell, so that the upper and lower transposition can be performed regularly, and the cost is saved.

The extension workbench comprises a positioning rod, an extension bracket, an extension platform and a locking piece, wherein the positioning rod is positioned at the bottom of a sawing platform of a sawing machine and extends out of the sawing platform, the extension bracket is horizontally moved and arranged on the positioning rod, the extension platform is horizontally paved on the extension bracket, the upper surface of the extension platform is flush with the upper surface of the sawing platform, the locking piece is used for locking the extension bracket and the positioning rod relatively, and the length direction of the positioning rod is consistent with the length direction of a material rod to be sawed on the sawing platform.

Preferably, the extension bracket comprises a first clamping plate, a second clamping plate and a plurality of rollers, wherein the first clamping plate and the second clamping plate extend along the length direction of the positioning rod and are positioned on two sides of the positioning rod, the rollers are transversely arranged between the first clamping plate and the second clamping plate and are sequentially distributed along the length direction of the positioning rod, the top and the bottom of the rollers are flush, and the rollers are slidingly arranged on the positioning rod from the bottom of the rollers.

Further, the inner sides of the first clamping plate and the second clamping plate are attached to the two sides of the positioning rod.

Further, the roller is rotatably arranged around the axis of the roller, and the axis of the roller is perpendicular to the center line of the positioning rod.

According to a specific implementation and preferred aspect of the present invention, the locking member includes a plurality of brake wheels disposed on the extension bracket and located at the bottom of the positioning rod, and a driving member for driving the plurality of brake wheels toward or away from the roller, and when the extension bracket horizontally slides on the positioning rod, the brake wheels are spaced apart from the roller and from the bottom of the positioning rod; when the extension bracket is locked on the positioning rod, the brake wheel is close to the roller and is propped against the bottom of the positioning rod.

Preferably, the plurality of brake wheels are staggered with the plurality of rollers. When the brake is positioned, the pressure is uniformly distributed, and the deformation of the positioning rod is prevented.

According to another specific implementation and preferred aspect of the invention, the number of the positioning rods is two, and the positioning rods are positioned at two sides of the sawing platform, and the extending supports are arranged in one-to-one correspondence with the positioning rods and the locking pieces.

The extension workbench further comprises a support frame which is positioned below the extension platform and fixed on the sawing machine base. The stability of the extension workbench is improved, and the end face after sawing is smooth and vertical.

According to still another specific implementation and preferred aspect of the present invention, the support frame includes a stay plate disposed in parallel with the extension platform, a diagonal stay at a bottom of the stay plate, and a connection pin slidably disposed on the stay plate along a length direction of the positioning rod, wherein a pin cap portion of the connection pin is slidably disposed on the stay plate, and a pin head portion is fixedly disposed at a bottom of the extension platform.

Preferably, grooves with upward notches and open two ends are formed in the supporting plate, and the grooves are two and are positioned on two sides; four connecting bolts are arranged, and two connecting bolts are correspondingly arranged in each groove.

Compared with the prior art, the invention has the following advantages:

when sawing, the invention can sweep the scraps adhered to the saw rack along with the movement of the saw rack, and can adjust the brushing range and force at any time, thereby ensuring that the scraps remained on the saw rack are thoroughly removed before entering the saw disc frame, further ensuring sawing efficiency and effect, and being convenient for cleaning the scraps after sawing; on the other hand, when not saw cutting, under the premise of not taking down the sawtooth strip, the file teeth of the sawtooth and the maintenance of the sawtooth strip are realized, the operation is very convenient, the structure is simple, and the cost is low.

Drawings

FIG. 1 is a schematic front view of a sawing machine according to the present invention;

FIG. 2 is an enlarged fragmentary schematic view of the automatic rasping mechanism of FIG. 1;

FIG. 3 is an enlarged partial schematic view of the oiling station of FIG. 1;

FIG. 4 is a left side schematic view of the extension table of FIG. 1;

in the accompanying drawings: 1. a saw disc; 2. a saw rack; 20. sawing the section; 21. a twisting section; 22. a horizontal section; 3. a fixing frame; 4. an automatic filing and sawing mechanism; 40. a bracket; 41. filing a file; 42. a driving unit; 420. a connecting rod; 421. a telescopic rod; 43. an oiling mechanism; 5. an anti-dandruff device; 50. a support rod; 51. a connecting piece; 510. a screw; 511. a nut; 512. a connection part; 513. a tension spring; 514. a limit nut; 515. a limiting piece; 52. a hanging arm; 53. brushing a disc; 54. brushing; 6. an oiling mechanism; 60. an oiling unit; 60a, a housing; 60b, oil absorption cloth; 60c, a fuel filling pipeline; 7. a connecting shaft; 8. a bearing; 9. sawing the platform; A. an extension table; a2, a positioning rod; a3, extending the bracket; a31, a first clamping plate; a32, a second clamping plate; a33, a roller; a4, extending the platform; a5, a locking piece; a50, a brake wheel; a51, a driving piece; a6, a material rod; a7, sliding sleeve; a8, locking the bolt; a9, a base; a10, supporting frames; 100. a supporting plate; 100a, grooves; 101. diagonal bracing; 102. and a connecting bolt.

Detailed Description

The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 4, the sawing machine provided in this embodiment includes two saw discs 1 disposed horizontally on the left and right sides of the axis, a saw blade 2 wound around the saw discs 1, a fixing frame 3 disposed between the two saw discs 1, a driving mechanism (not shown in the drawings) for driving the saw discs 1 to rotate, and a sawing platform 9, wherein the saw blade 2 is divided into a sawing section 20 and a twisting section 21 disposed at the lower portion, and a horizontal section 22 disposed at the upper portion, the driving mechanism is capable of switching between a stepping type and a continuous type, and when the file teeth are formed, the driving mechanism is in a stepping type; when being in sawing, actuating mechanism is continuous, and the sawing machine still includes setting up on mount 3 and carrying out automatic file serration mechanism 4 of file tooth to the sawtooth through horizontal segment 22 in proper order, be located the below of twisting section 21 and be close to the chip removing mechanism 5 of the section 20 that saw cuts, be located automatic file serration mechanism 4 the rear and can carry out the oiling mechanism 6 of oiling protection with the sawtooth strip 2 surface after the file grinds, and be located saw cut the extension workstation A that the outer tip of platform 9 can support the material stick A6A that saw cut platform 9 to the emission.

Specifically, the automatic filing and hacking mechanism 4 includes a holder 40 horizontally extending from one side of the holder, a filing bar 41 movably disposed on the holder 40 in a vertical direction and located above the saw teeth of the saw rack 2, a driving unit 42 for driving the movement of the filing bar 41 to a movement stroke after descending, wherein the filing bar 41 is matched with the saw teeth of the saw tooth bar 2, and when the filing bar 41 is reset after completing a movement stroke, and the filing bar 41 is filed with the aligned saw teeth in the stroke.

The driving unit 42 is respectively communicated with the driving mechanism in the central control system of the sawing machine, and when the driving mechanism drives the saw teeth, the driving unit starts to move and enables the file strip 41 to reset after completing one movement stroke.

Specifically, the driving unit 42 includes a connecting rod 420 connected to the upper end of the file 41, and a telescopic rod 421 with two ends connected to the connecting rod 420 and the support 40, respectively, where the telescopic rod 421 is disposed parallel to the file 41 and is in communication (electric communication) with the central control system. The telescopic rod 421 can be driven electrically, pneumatically or hydraulically.

In this example, a plurality of file strips 41 are arranged side by side, and the connecting rod 420 fixedly connects the upper end portions of the file strips 41.

There are a plurality of telescopic rods 421 and the telescopic motions are synchronized.

Meanwhile, the automatic rasp sawtooth mechanism 4 described above further includes an oiling mechanism 6 which is provided at one side of the rasp bar 41 and is capable of oiling and rust preventing the saw tooth bar passing through the horizontal section 22 on or/and with the lower surface.

In this example, the saw blade 2 rotates anticlockwise with the chip-discharging end of the saw segment 20 on the right.

The anti-dandruff device 5 comprises a supporting rod 50, the left end part of which is fixed on the fixed frame 3, and the right end part of which extends towards the saw disc 1 which is close to the fixed frame; a hanging arm 52 whose upper end is movably hung on the right end of the strut 50 through a connecting piece 51; a brush plate 53 positioned at the bottom of the hanging arm 52 and close to the saw rack 2; bristles 54 provided on the outer circumference of the brush plate 53 and capable of brushing out the chips adhered to the saw blade 2, wherein the brush plate 53 is rotated synchronously about the horizontal axis direction by the movement of the saw blade 2.

Specifically, the connection member 51 includes a screw 510 penetrating the strut 50 from bottom to top, a nut 511 rotatably disposed on the strut 50 and matched with the screw 510, and a limiting member 515 for limiting rotation of the screw 510, wherein the screw 510 moves up and down (i.e., a screw-nut matching manner) by rotating the adjusting nut 511, and an upper end portion of the hanging arm 52 is connected to a bottom of the screw 510.

The screw 510 is provided with a connecting portion 512 at the bottom thereof, and the stoppers 515 are clamped on both sides of the connecting portion 512, thereby restricting the rotation of the screw 510 by restricting the rotation of the connecting portion 512.

Further, the upper end of the stopper 515 is fixed to the bottom of the strut 50.

The upper end of the hanging arm 52 is swingably provided on the connecting portion 512.

Further, in this embodiment, the connecting member 51 further includes a tension spring 513 with two ends connected to the connecting portion 512 and the hanging arm 52, and a limit nut 514 located below the strut 50 and engaged with the screw 510.

In this example, the bristles 54 are steel wires and have a diameter of 0.56 to 2.0mm. Specific optional 14# steel wire: diameter: 2mm;18# wire: diameter: 1.2mm;20# wire: diameter: 0.9mm;24# wire: diameter: 0.56mm. In this example, 18# wire was selected.

One end of the wire is fixedly provided on the brush plate 54, and the other end extends outward in the radial direction of the brush plate 54.

The brush plate 54 is connected to the connecting shaft 7 and the bearing 8 between the suspension arms 52.

At the same time, the struts 50 are disposed horizontally.

In this example, the saw-tooth bar 2 located at the horizontal section 22 moves leftward as seen from the counterclockwise rotation of the saw-tooth bar 2, and the oiling mechanism 6 is located at the left side of the rasp bar.

The oiling mechanism 6 comprises oiling units 60 positioned on the upper side and the lower side of the saw rack 2, the oiling units 60 comprise a shell 60a with a cavity inside and oil absorption cloth 60b filled in the cavity, wherein the oil absorption cloth is coiled into a cylinder shape, and the part contacted with the saw rack 2 is scattered from the end of the cylinder to the periphery to form a cloth strip shape.

Meanwhile, a fuel filling pipe 60c communicating with the cavity is also provided on the housing.

In addition, the oiling unit 60 located up and down can be disposed upside down. In general, the upper shell is filled with oil, and the main reason is that part of oil after wiping is stored in the lower shell, so that the upper and lower transposition can be performed regularly, and the cost is saved.

Then, in the present application, the purpose of oiling is on the one hand to ensure that the saw-tooth bar surface does not rust; on the other hand, the scraps after filing are removed, and the scraps on the oil absorption cloth are removed by slight shaking.

The extending workbench A comprises a locating rod A2, an extending support A3, an extending platform A4 and a locking piece A5, wherein the locating rod A2 is arranged at the bottom of a sawing platform 9 of the sawing machine and extends out of the sawing platform 9, the extending support A3 is horizontally arranged on the locating rod A2, the extending platform A4 is horizontally paved on the extending support A3, the upper surface of the extending platform A4 is flush with the upper surface of the sawing platform 9, and the locking piece A5 is used for locking the extending support A3 and the locating rod A2 relatively, wherein the length direction of the locating rod A2 is consistent with the length direction of a material rod A6 to be sawed, which is positioned on the sawing platform 9.

Specifically, the extending bracket A3 includes a first clamping plate a31 and a second clamping plate a32 extending along the length direction of the positioning rod A2 and located at two sides of the positioning rod A2, and a plurality of rollers a33 transversely arranged between the first clamping plate a31 and the second clamping plate a32 and sequentially distributed along the length direction of the positioning rod A2, wherein the tops and bottoms of the plurality of rollers a33 are flush, and the bottoms of the rollers a33 are slidingly arranged on the positioning rod A2.

The inner sides of the first clamping plate A31 and the second clamping plate A32 are attached to the two sides of the positioning rod A2. Thereby defining the direction of movement of the extension platform A4.

Further, the roller a33 is rotatably disposed around its own axis, and the axis of the roller a33 is perpendicular to the center line of the positioning rod A2.

The locking piece A5 comprises a plurality of brake wheels A50 arranged on the extending bracket A3 and positioned at the bottom of the positioning rod A2, and a driving piece 51 used for driving the brake wheels A50 to be close to or far away from the roller A33, wherein when the extending bracket A3 horizontally slides on the positioning rod A2, the brake wheels A50 are far away from the roller A33 and are arranged at a distance from the bottom of the positioning rod A2; when the extension bracket A3 is locked on the positioning rod A2, the brake wheel a50 is close to the roller a33 and is abutted against the bottom of the positioning rod A2.

The plurality of brake wheels A50 and the plurality of rollers A33 are distributed in a staggered manner. When the brake is positioned, the pressure is uniformly distributed, and the deformation of the positioning rod A2 is prevented.

The number of the positioning rods A2 is two, and the positioning rods A2 are positioned at two sides of the sawing platform 9.

Specifically, a sliding sleeve A7 and a locking bolt A8 are arranged at the bottom of the sawing platform 9, and a positioning rod A2 is movably arranged in the sliding sleeve A7.

In this example, the extension brackets A3 are disposed in one-to-one correspondence with the positioning rods A2 and the locking members A5. In other words, there are two sets of extension brackets A3 and two sets of locking members A5.

Meanwhile, the extension workbench further comprises a support frame 10 which is positioned below the extension platform A4 and fixed on the sawing machine base A9. The stability of the extension workbench is improved, and the end face after sawing is smooth and vertical.

The support frame 10 comprises a supporting plate 100 arranged in parallel with the extension platform A4, an inclined strut 101 positioned at the bottom of the supporting plate 100, and a connecting bolt 102 capable of being arranged on the supporting plate 100 in a sliding manner along the length direction of the positioning rod A2, wherein a bolt cap part of the connecting bolt 102 is arranged on the supporting plate 100 in a sliding manner, and a bolt head part is fixedly arranged at the bottom of the extension platform A4.

Specifically, grooves 100a with upward notches and open at two ends are formed in the supporting plate 100, and the grooves 100a are two and are located at two sides; four connecting bolts 102 are provided, and two connecting bolts 102 are correspondingly arranged in each concave groove 100 a.

The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the same, but are not intended to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.

Claims (8)

1. The utility model provides a sawing machine convenient to valve body material section saw cuts, its including being located two saw discs that left and right sides axial lead level set up, winding saw rack on the saw disc, be located two mount between the saw disc, be used for the drive saw disc pivoted actuating mechanism, saw cutting platform, wherein the saw rack including saw cutting section and the distortion section that are located the lower part and the horizontal segment that is located upper portion, its characterized in that: the driving mechanism can be switched between a stepping type and a continuous type, and is in a stepping type when the file teeth are formed; when sawing, the driving mechanism is continuous, the sawing machine further comprises an automatic filing mechanism which is arranged on the fixing frame and sequentially files the sawteeth passing through the horizontal section, a chip removing mechanism which is positioned below the twisting section and is close to the chip outlet end part of the sawing section, an oiling mechanism which is positioned behind the automatic filing mechanism and can carry out oiling protection on the surface of the sawteeth after filing, and an extension workbench which is positioned at the outer end part of the sawing platform and can support the material rod which emerges from the sawing platform, wherein the oiling mechanism comprises oiling units positioned at the upper side and the lower side of the sawteeth, the oiling units comprise a shell with a cavity inside, and oil absorption cloth which is filled in the cavity, and the cloth is coiled into a cylinder shape, and the part contacted with the sawteeth is scattered from the end part of the cylinder to the periphery to form a cloth strip shape; the extension workbench comprises a positioning rod, an extension support, an extension platform and a locking piece, wherein the positioning rod is located at the bottom of a sawing platform of the sawing machine and extends out of the sawing platform, the extension support is horizontally arranged on the positioning rod, the extension platform is horizontally paved on the extension support, the upper surface of the extension platform is flush with the upper surface of the sawing platform, the locking piece is used for locking the extension support and the positioning rod relatively, and the length direction of the positioning rod is consistent with the length direction of a material rod to be sawed on the sawing platform.

2. Sawing machine facilitating the sawing of valve body segments according to claim 1, characterized in that: the anti-dandruff mechanism comprises a supporting rod, one end part of which is fixed on the fixed frame, and the other end part of which extends towards the saw disc which is close to the fixed frame; a hanging arm with an upper end part movably hung at the other end part of the supporting rod through a connecting piece; a brush disc positioned at the bottom of the hanging arm and close to the saw rack; the brush hair is arranged on the periphery of the brush disc and can brush away the scraps adhered on the saw tooth bar, and the brush disc synchronously rotates around the horizontal axis direction under the driving of the movement of the saw tooth bar.

3. Sawing machine facilitating the sawing of valve body segments according to claim 2, characterized in that: the connecting piece include from bottom to top wear out the screw rod of branch, rotate set up on the branch and with screw rod assorted nut, wherein through adjusting the nut rotates, the screw rod up-and-down motion, the link arm upper end connection be in the screw rod bottom.

4. A sawing machine facilitating the sawing of valve body segments according to claim 3, wherein: the bottom of the screw is provided with a connecting part, and the upper end part of the hanging arm is arranged on the connecting part in a swinging way.

5. The sawing machine facilitating sawing of valve body sections according to claim 4, wherein: the connecting piece also comprises a tension spring with two ends connected with the connecting part and the hanging arm.

6. Sawing machine facilitating the sawing of valve body segments according to claim 1, characterized in that: the automatic file sawtooth mechanism comprises a support, a file strip and a driving unit, wherein the support horizontally extends from one side of the fixing frame, the file strip can be movably arranged on the support along the vertical direction and is located above the sawteeth of the sawtooth strip, the driving unit is used for driving the file strip to move into a movement stroke after descending and resetting, the file strip is matched with the sawteeth of the sawtooth strip, the file strip resets after completing the movement stroke, and in the stroke, the file strip and the aligned sawteeth are subjected to file grinding.

7. The sawing machine facilitating sawing of valve body sections according to claim 6, wherein: the driving unit and the driving mechanism are respectively communicated with the central control system of the sawing machine, and when the driving mechanism drives the saw teeth to move further back and forth, the driving unit starts to move and enables the file to reset after completing a movement stroke.

8. The sawing machine facilitating sawing of valve body sections according to claim 7, wherein: the driving unit comprises a connecting rod connected to the upper end part of the file strip, and a telescopic rod with two ends respectively connected to the connecting rod and the bracket, wherein the telescopic rod is arranged in parallel with the file strip and is communicated with the central control system; the file strip have many, just set up side by side, the connecting rod with many the upper end of file strip looks fixed connection.

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