CN113305635A

CN113305635A - Numerical control metal cutting machine tool and machining method thereof

Info

Publication number: CN113305635A
Application number: CN202110657788.3A
Authority: CN
Inventors: 谭宇娟
Original assignee: Shenzhen Anpusheng Technology Co ltd
Current assignee: Shenzhen Anpusheng Technology Co ltd
Priority date: 2021-06-14
Filing date: 2021-06-14
Publication date: 2021-08-27

Abstract

The invention provides a numerical control metal cutting machine tool and a machining method thereof, and relates to the technical field of metal machining. The invention provides a numerical control metal cutting machine tool and a machining method thereof, and the numerical control metal cutting machine tool comprises a machine tool body, a supporting frame, a fixing plate, an air exhaust collecting device, a dust removing mechanism, a cutting device, a waterproof mechanism and a hose, wherein the supporting frame is arranged on one side of the middle part of the machine tool body, the top end of the machine tool body between slide rails is connected with the fixing plate in a sliding mode, the air exhaust collecting device is arranged below the machine tool body, the top ends of the machine tool bodies on two sides of the fixing plate are fixedly connected with the dust removing mechanism, the middle part of the supporting frame between the dust removing mechanism is fixedly connected with the cutting device, the waterproof mechanism is fixedly connected onto the cutting device, the hose is fixedly connected onto one side, close to the edge of the machine tool, of the dust removing mechanism, and the other end of the hose is fixedly connected with the air exhaust collecting device.

Description

Numerical control metal cutting machine tool and machining method thereof

Technical Field

The invention relates to the technical field of metal processing, in particular to a numerical control metal cutting machine tool and a processing method thereof.

Background

The numerically controlled lathe is one of the widely used numerically controlled machines at present, and is mainly used for cutting and processing the inner and outer cylindrical surfaces, the inner and outer conical surfaces with any taper angle, the inner and outer curved surfaces of complex rotation, the cylindrical and conical threads and the like of shaft parts or disc parts, and can perform cutting, drilling, reaming, boring and the like.

When cutting the metal through digit control machine tool, the dust raise can appear in the lathe top in the contact between high-speed pivoted cutting piece and the metal, influences air quality in the workshop to and too much dust is piled up on the lathe and still can cause the influence to the precision of cutting, and the iron fillings that produce when making the cutting splash to cutting piece both sides and scatter all around and pile up inconvenient collecting iron fillings in the lathe.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a numerical control metal cutting machine tool and a machining method thereof, and solves the problems that dust is raised when a metal is cut by the numerical control machine tool and scrap iron generated by cutting is inconvenient to collect.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a numerical control metal cutting machine, which comprises a lathe, the support frame, the fixed plate, the collection device bleeds, dust removal mechanism, cutting device, waterproofing mechanism, the hose, there is the side in the lathe middle part to be equipped with the support frame, lathe top sliding connection has the fixed plate between the slide rail, the lathe below is equipped with the collection device that bleeds, fixed plate both sides lathe top fixedly connected with dust removal mechanism, support frame middle part fixedly connected with cutting device between the dust removal mechanism, fixedly connected with waterproofing mechanism on the cutting device, fixedly connected with hose on one side that dust removal mechanism is close to the lathe edge, the hose other end and the collection device fixed connection that bleeds.

Preferably, the cutting device comprises a rotating shaft fixedly connected with the left side of the lower half section of the cutting device, a cutting blade is fixedly connected with the left side of the rotating shaft, the top end of the dust removing mechanism is arranged below the top end of the support frame, and a collecting box is arranged at the bottom end of the air exhaust collecting device.

Preferably, the dustproof mechanism comprises a connecting electromagnet block fixedly connected with the top end of the machine tool and arranged at the top end of the machine tool, an air exhaust box is fixedly connected with the top end of the connecting electromagnet block, a connecting box is fixedly connected with one side, close to the edge of the machine tool, of the air exhaust box, a hose is fixedly connected with the other side of the connecting box, one side, far away from the edge of the machine tool, of the air exhaust box is fixedly connected with a collecting box, round notches are uniformly formed in one side, far away from the edge of the machine tool, of the air exhaust box, electromagnet covers are fixedly connected with the surfaces of the round notches, connecting springs are uniformly and fixedly connected with the inner sides, close to the edge, of the round notches, collision balls are fixedly connected with the other ends of the connecting springs, spoiler pieces are uniformly and fixedly connected with connecting rings among the collision balls, connecting blocks are arranged near the middle parts of the bottom ends of the inner sides of the round notches, and electromagnet strips are uniformly and fixedly connected with the peripheries of the connecting blocks, the other end of the electromagnet strip is fixedly connected with the inner wall of the circular notch, one side of the connecting block, which is close to the bottom end of the inner side of the notch, is fixedly connected with a limiting spring, the limiting spring penetrates through the bottom end of the circular notch and is fixedly connected with the inner wall of the air exhaust box, and the connecting block is slidably connected with the bottom end of the circular notch.

Preferably, the collision ball is evenly provided with a round opening, the spoiler is W-shaped, one side of the middle part of the spoiler, which is convex, faces one side of the electromagnet cover, the collection box penetrates through the air pumping box and is fixedly connected with the air pumping box, one half of the collection box is arranged in the air pumping box, and the spoiler is distributed in the collision ball in a left-right staggered manner.

Preferably, waterproofing mechanism include with cutting device first section left side fixed connection's link, the link is close to left side bottom fixedly connected with water jet, cutting device second section left side fixedly connected with water jet, the pivot left and right sides is arranged in to the water jet, the cutting piece is close to the bottom left and right sides and is equipped with first collection frame, first collection frame is kept away from cutting piece one side fixedly connected with second and is collected the frame, bottom fixed connection has the water guide plate in the first collection frame, be equipped with the arc cover on the cutting piece top, arc cover bottom and link top fixed connection, link bottom fixed connection has the telescopic link, telescopic link bottom and first collection frame top fixed connection.

Preferably, there is the arc arch first collection frame bottom, and the water jet inclines to one side at cutting piece place, and the second is collected the frame and is expanded to one side of keeping away from the cutting piece, and the arc covers for the arc.

A machining method of a numerical control metal cutting machine tool comprises the following steps,

s1: placing metal between fixing plates on a machine tool for fixing, starting a cutting device to drive a rotating shaft to rotate, and driving a cutting blade to rotate by rotating the rotating shaft so as to cut the metal;

s2: when metal is cut, the air exhaust and collection device is started to suck air outside the air exhaust box into the air exhaust box through the hose and the connection box so as to inhibit dust generated by cutting the metal, and the electromagnet cover and the electromagnet strip are electrified so as to filter scrap iron entering a circular notch on the air exhaust box;

s3: when cooling down the cutting blade through water jet blowout cooling water, collect the frame through the second, first collection frame, the arc cover blocks the water of flying squirt from the cutting blade to and when the cutting blade is absorbed into gradually in the metal through the arc protrusion and the metal surface contact of first collection frame bottom make the telescopic link shrink, make waterproof mechanism can adapt to the cutting to the metal of different thickness.

(III) advantageous effects

(1) According to the invention, dust and scrap iron generated in the metal cutting process are collected through the electromagnet cover, the electromagnet strip, the air suction box and the air suction collection device which are arranged in the dust removal mechanism, the scrap iron and the dust are prevented from scattering around to influence the air quality of a workshop in the cutting process, the scrap iron and the dust are prevented from being accumulated in a machine tool for a long time to influence the normal operation of the machine tool and the scrap iron to be collected conveniently and then to be reused, the dust and the scrap iron are separated through the electromagnet cover and the electromagnet strip, the scrap iron is prevented from entering the air suction collection device to be accumulated in the air suction collection device to influence the normal operation of the air suction collection device, and therefore, the effect of inhibiting the dust raising generated in the metal cutting process is influenced.

(2) According to the invention, through the spoiler, the collision ball and the limiting spring arranged in the dust removal mechanism, when airflow flows in the circular notch arranged on the air exhaust box, the collision ball can swing left and right under the action of the spoiler and the limiting spring to collide with the electromagnet cover and the electromagnet strip, so that scrap iron adsorbed on the electromagnet cover and the electromagnet strip is collided, and the phenomenon that the clearance between the electromagnet cover and the electromagnet strip is blocked to influence the air entering the air exhaust box due to the fact that excessive scrap iron is adsorbed between the electromagnet cover and the electromagnet strip is prevented, thereby influencing the inhibiting effect on dust generated in metal cutting is avoided.

(3) According to the invention, the second collecting frame, the first collecting frame, the water guide plate and the arc-shaped cover which are arranged in the cutting device are used for blocking the cooling water splashed around when the cutting blade rotates, so that the phenomenon that the excessive cooling water is splashed around when being in contact with the cutting blade rotating at a high speed in the process of cutting metal and is in contact with the raised dust on the machine tool to condense and accumulate dust in the machine tool is prevented.

(4) According to the invention, through the telescopic rod arranged in the cutting device and the arc-shaped bulge at the bottom end of the first collecting frame, when different metals are cut, the first collecting frame and the second collecting frame can move upwards along with the deepening of the cutting blade entering the metals, so that excessive cooling water can not splash into a machine tool when the cutting blade cuts the metals with different thicknesses.

Drawings

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

FIG. 2 is a front view of the suction box of the present invention;

FIG. 3 is a side cross-sectional view of the evacuation cartridge of the present invention;

FIG. 4 is a schematic view of an attachment ring structure according to the present invention;

FIG. 5 is a side cross-sectional view of the impact ball of the present invention;

FIG. 6 is a front view of the waterproofing mechanism of the present invention;

FIG. 7 is a side cross-sectional view of the waterproofing mechanism of the present invention;

FIG. 8 is an enlarged view of the structure of FIG. 3A according to the present invention.

The device comprises a machine tool 1, a support frame 2, a fixing plate 3, an air extraction collection device 4, a dust removal mechanism 5, a connecting electromagnet block 501, an air extraction box 502, a connecting box 503, a collection box 504, an electromagnet cover 505, a connecting spring 506, a collision ball 507, a spoiler 508, a connecting ring 509, a connecting block 510, an electromagnet strip 511, a limiting spring 512, a cutting device 6, a rotating shaft 601, a cutting blade 602, a waterproof mechanism 7, a connecting frame 701, a water spray opening 702, a first collection frame 703, a second collection frame 704, a water guide plate 705, an arc cover 706, a telescopic rod 707 and a hose 8.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings 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.

As shown in fig. 1-8, an embodiment of the present invention provides a numerical control metal cutting machine, including a machine tool 1, a supporting frame 2, a fixing plate 3, an air-extracting and collecting device 4, a dust-removing mechanism 5, a cutting device 6, a waterproof mechanism 7, and a hose 8, wherein the supporting frame 2 is arranged on the right side of the middle portion of the machine tool 1, the fixing plate 3 is slidably connected to the top end of the machine tool 1 between slide rails, the air-extracting and collecting device 4 is arranged below the machine tool 1, the dust-removing mechanism 5 is fixedly connected to the top ends of the machine tool 1 on both sides of the fixing plate 3, the cutting device 6 is fixedly connected to the middle portion of the supporting frame 2 between the dust-removing mechanism 5, the waterproof mechanism 7 is fixedly connected to the cutting device 6, the hose 8 is fixedly connected to one side of the dust-removing mechanism 5 close to the edge of the machine tool 1, the other end of the hose 8 is fixedly connected to the air-extracting and collecting device 4, the cutting device 6 includes a rotating shaft 601 fixedly connected to the left side of the lower half section of the cutting device 6, the left side of the rotating shaft 601 is fixedly connected with a cutting blade 602, the top end of the dust removing mechanism 5 is arranged below the top end of the support frame 2, and the bottom end of the air exhaust and collection device 4 is provided with a collection box.

The dustproof mechanism comprises a connecting electromagnet block 501 which is arranged at the top end of a machine tool 1 and fixedly connected with the top end of the machine tool 1, an air exhaust box 502 is fixedly connected with the top end of the connecting electromagnet block 501, a connecting box 503 is fixedly connected with one side of the air exhaust box 502 close to the edge of the machine tool 1, a hose 8 is fixedly connected with the other side of the connecting box 503, a collecting box 504 is fixedly connected with one side of the air exhaust box 502 far away from the edge of the machine tool 1 close to the bottom end, round notches are uniformly arranged on one side of the air exhaust box 502 far away from the edge of the machine tool 1, an electromagnet cover 505 is fixedly connected with the surface of each round notch, a connecting spring 506 is uniformly and fixedly connected with the inner side of each round notch close to the edge, a collision ball 507 is fixedly connected with the other end of the connecting spring 506, a flow disturbing sheet 508 is uniformly and fixedly connected in each collision ball 507, a connecting ring 509 is fixedly connected between the collision balls 507, and a connecting block 510 is arranged at the inner side of each round notch close to the middle part of the bottom end, even fixedly connected with electromagnetism strip 511 on the circumference of connecting block 510, the electromagnetism strip 511 other end and circular recess inner wall fixed connection, connecting block 510 is close to the inboard one side fixedly connected with spacing spring 512 of bottom of recess, spacing spring 512 passes circular recess bottom and bleeds box 502 inner wall fixed connection, connecting block 510 and circular recess bottom sliding connection, the round mouth has evenly been seted up on the collision ball 507, spoiler 508 is the W type, the bellied one side in spoiler 508 middle part is towards one side that electromagnetism cover 505 was located, collect box 504 and pass and bleed box 502 fixed connection, collect box 504 and arrange in the box 502 that bleeds in half outside the box 502 that bleeds in the box 502 that collects, spoiler 508 is in the collision ball 507 about staggered distribution.

The waterproof mechanism 7 comprises a connecting frame 701 fixedly connected with the left side of the upper half section of the cutting device 6, a water spray port 702 is fixedly connected with the bottom end of the connecting frame 701 close to the left side, a water spray port 702 is fixedly connected with the left side of the lower half section of the cutting device 6, the water spray ports 702 are arranged on the left side and the right side of the rotating shaft 601, a first collecting frame 703 is arranged on the left side and the right side of the cutting blade 602 close to the bottom end, a second collecting frame 704 is fixedly connected with one side of the first collecting frame 703 far away from the cutting blade 602, a water guide plate 705 is fixedly connected with the bottom end of the first collecting frame 703, an arc cover 706 is arranged on the top end of the cutting blade 602, the bottom end of the arc cover 706 is fixedly connected with the top end of the connecting frame 701, a telescopic rod 707 is fixedly connected with the bottom end of the connecting frame 701, an arc bulge 703 is arranged at the bottom end of the first collecting frame, the water spray port 702 inclines towards one side of the cutting blade 602, and the second collecting frame 704 expands towards one side far away from the cutting blade 602, the arc cover 706 is arc-shaped.

s1: placing metal on a machine tool 1 and fixing the metal between fixing plates 3, starting a cutting device 6 to drive a rotating shaft 601 to rotate, and driving a cutting blade 602 to rotate by rotating the rotating shaft 601 so as to cut the metal;

s2: when cutting metal, the air extraction and collection device 4 is started to extract air outside the air extraction box 502 into the air extraction box 502 through the hose 8 and the connection box 503 to inhibit dust generated by cutting the metal, and the electromagnet cover 505 and the electromagnet strips 511 are electrified to filter iron chips entering a circular notch on the air extraction box 502, when the air enters the collision ball 507 from a circular hole on the collision ball 507 through the collision ball 507, the collision ball 507 swings left and right under the action of the spoiler 508 and collides with the electromagnet cover 505 and the electromagnet strips 511, and the iron chips are prevented from being adsorbed on the electromagnet cover 505 and the electromagnet strips 511;

s3: when the cutting blade 602 is cooled by the cooling water sprayed from the water spray opening 702, the water splashed from the cutting blade 602 is blocked by the second collection frame 704, the first collection frame 703 and the arc cover 706, and the telescopic rod 707 is contracted by the contact of the arc protrusion at the bottom end of the first collection frame 703 and the metal surface when the cutting blade 602 is gradually sunk into the metal, so that the waterproof mechanism 7 can adapt to the cutting of metals with different thicknesses.

During the use, the metal that will wait to cut is placed between fixed plate 3, treat through fixed plate 3 and cut the metal and fix, start cutting device 6 after accomplishing metal fixation, cutting device 6 drives cutting piece 602 through pivot 601 and rotates and cut the metal, cutting piece 602 both sides have a large amount of iron fillings to splashing to cutting piece 602 both sides when cutting piece 602 rotates at a high speed and cuts the metal, cutting piece 602 rotates at a high speed simultaneously and can make the metal vibrate thereby make the raise dust appear on lathe 1, start air extraction collection device 4 this moment and will bleed the air suction box 502 between the box 502 through hose 8 and connecting box 503 in, thereby the raise dust that produces when cutting the metal suppresses, the dust that the suction box 502 in the suction box 502 can finally get into the setting in the collection box 4 bottom of air extraction collection device through connecting

box

503 and 8, the air enters into the suction box 502 under the effect of air extraction collection device 4 and makes and can bring partial iron fillings together into in the suction box 502 When the scrap iron splashes to the two sides of the cutting blade 602, part of the scrap iron enters the circular groove on the air extracting box 502, the rest of the scrap iron is adsorbed on the connecting electromagnet block 501 and falls into the part of the collecting box 504 arranged outside the air extracting box 502, when the scrap iron enters the circular groove, the electromagnet cover 505 and the electromagnet strip 511 are electrified, so that the scrap iron is adsorbed on the electromagnet cover 505 and the electromagnet strip 511, the scrap iron is prevented from entering the air extracting and collecting device 4 along with air through the connecting box 503 and the hose 8, the scrap iron is accumulated in the air extracting and collecting device 4 to influence the normal operation of the air extracting and collecting device 4, and the scrap iron is convenient to be collected, so that the follow-up scrap iron can be reused, when the air enters the air extracting box 502 through the circular notch, the collision ball 507 can move towards the inner side of the circular notch due to the blocking of the air flow disturbing piece 508, the collision ball 507 is reset when contacting with the electromagnet strips 511 under the action of the limiting spring 512, so that the collision ball 507 can swing left and right when air flows through a circular notch, the collision ball 507 can continue to swing left and right under the action of inertia and the limiting spring 512 for a period of time to collide the electromagnet cover 505 and the electromagnet strips 511 when the air-extracting and collecting device 4 stops working, the electromagnet cover 505 and the electromagnet strips 511 stop being electrified when the arc-shaped air-extracting and collecting device 4 stops working, iron filings can fall from the electromagnet cover 505 and the electromagnet strips 511 into the collecting box 504, and the electromagnet cover 505 and the electromagnet strips 511 are collided through the swinging of the collision ball 507, the iron filings are prevented from being adsorbed on the electromagnet cover 505 and the electromagnet strips 511 after being magnetized and being accumulated on the electromagnet cover 505 and the electromagnet strips 511, and the influence of the blockage of a gap between the electromagnet cover 505 and the electromagnet strips 511 caused by excessive iron filings accumulated on the electromagnet cover 505 and the electromagnet strips 511 is prevented And dust emission during metal cutting is inhibited.

When the cutting blade 602 is cooled by the water jet 702, the cutting blade 602 rotates at a high speed to splash water sprayed on the cutting blade 602, when the splashed water contacts dust on the machine tool 1, the dust agglomerates are agglomerated to form dust agglomerates, when the dust agglomerates are excessively accumulated, the accuracy of metal cutting may be affected, when water splashes on the cutting blade 602, the splashed water is blocked by the second collecting frame 704 and the first collecting frame 703, the water falling into the first collecting frame 703 and the second collecting frame 704 flows to the surface of the cutting blade 602 through the water guide plate 705 to cool the cutting blade 602, so that excessive cooling water is prevented from splashing around, the top end of the cutting blade 602 is shielded by the arc cover 706, the water on the cutting blade 602 is prevented from being thrown out by the top end of the arc cover 706 due to the centrifugal force, when metal is cut by the cutting blade 602, under the action of the telescopic rod 707, the first collecting frame 703 and the water guide plate 705 can move upwards along with the depth deepening of the cutting blade 602 entering the metal, so that the excessive cooling water can be prevented from splashing around in the cutting process when the metal with different thicknesses is cut.

Claims

1. The utility model provides a numerical control metal cutting lathe, includes lathe (1), support frame (2), fixed plate (3), the collection device (4) of bleeding, dust removal mechanism (5) (5), cutting device (6), waterproofing mechanism (7), hose (8), its characterized in that: lathe (1) middle part has the side to be equipped with support frame (2), lathe (1) top sliding connection has fixed plate (3) between the slide rail, lathe (1) below is equipped with collection device (4) of bleeding, fixed plate (3) both sides lathe (1) top fixedly connected with dust removal mechanism (5), support frame (2) middle part fixedly connected with cutting device (6) between dust removal mechanism (5), fixedly connected with waterproofing mechanism (7) are gone up in cutting device (6), fixedly connected with hose (8) are gone up to one side that dust removal mechanism (5) are close to lathe (1) edge, hose (8) other end and collection device (4) fixed connection bleed.

2. A numerically controlled metal cutting machine according to claim 1, wherein: cutting device (6) include with cutting device (6) half section left side fixed connection's pivot (601), pivot (601) left side fixed connection has cutting piece (602), support frame (2) top below is arranged in on dust removal mechanism (5) top, and collection device (4) bottom of bleeding is equipped with the collecting box.

3. A numerically controlled metal cutting machine according to claim 1, wherein: the dustproof mechanism comprises a connecting electromagnet block (501) which is arranged at the top end of a machine tool (1) and fixedly connected with the top end of the machine tool (1), an air pumping box (502) is fixedly connected with the top end of the connecting electromagnet block (501), a connecting box (503) is fixedly connected with one side of the air pumping box (502) close to the edge of the machine tool (1), a hose (8) is fixedly connected with the other side of the connecting box (503), a collecting box (504) is fixedly connected with one side of the air pumping box (502) far away from the edge of the machine tool (1) close to the bottom end, round notches are uniformly formed in one side of the air pumping box (502) far away from the edge of the machine tool (1), an electromagnet cover (505) is fixedly connected with the surface of the round notch, a connecting spring (506) is uniformly and fixedly connected with the inner side of the round notch close to the edge, a collision ball (507) is fixedly connected with the collision ball (507), and flow disturbing pieces (508) are uniformly and fixedly connected with the inner part of the collision ball (507), fixedly connected with go-between (509) between collision ball (507), the circular recess inboard is close to the bottom middle part and is equipped with connecting block (510), even fixedly connected with electromagnetism iron strip (511) on connecting block (510) circumference, the electromagnetism iron strip (511) other end and circular recess inner wall fixed connection, connecting block (510) are close to one side fixedly connected with spacing spring (512) of the inboard bottom of recess, spacing spring (512) pass circular recess bottom and take out gas box (502) inner wall fixed connection, connecting block (510) and circular recess bottom sliding connection.

4. A numerically controlled metal cutting machine according to claim 3, wherein: round openings are uniformly formed in the collision ball (507), the spoiler (508) is W-shaped, one side, protruding in the middle of the spoiler (508), faces to one side where the electromagnet cover (505) is located, the collection box (504) penetrates through the air exhaust box (502) and is fixedly connected with the air exhaust box (502), one half of the collection box (504) is arranged in the air exhaust box (502), the other half of the collection box is arranged outside the air exhaust box (502), and the spoilers (508) are distributed in the collision ball (507) in a left-right staggered mode.

5. A numerically controlled metal cutting machine according to claim 1, wherein: waterproof machanism (7) include with cutting device (6) first section left side fixed connection's link (701), link (701) are close to left side bottom fixedly connected with water jet (702), cutting device (6) second section left side fixedly connected with water jet (702), pivot (601) left and right sides are arranged in to water jet (702), cutting piece (602) are close to the bottom left and right sides and are equipped with first collection frame (703), cutting piece (602) one side fixedly connected with second collection frame (704) are kept away from in first collection frame (703), bottom end fixedly connected with water deflector (705) in first collection frame (703), be equipped with arc cover (706) on cutting piece (602) top, arc cover (706) bottom and link (701) top fixed connection, link (701) bottom fixedly connected with telescopic link (707), telescopic link (707) bottom and first collection frame (703) top fixed connection.

6. A numerically controlled metal cutting machine according to claim 5, wherein: the bottom end of the first collecting frame (703) is provided with an arc-shaped bulge, the water spray opening (702) inclines to one side where the cutting blade (602) is located, the second collecting frame (704) expands to one side far away from the cutting blade (602), and the arc-shaped cover (706) is arc-shaped.

7. A machining method of a numerical control metal cutting machine tool is characterized by comprising the following steps: comprises the following steps of (a) carrying out,

s1: placing metal between fixing plates (3) on a machine tool (1) for fixing, starting a cutting device (6) to drive a rotating shaft (601) to rotate, and driving a cutting blade (602) to rotate by the rotation of the rotating shaft (601) so as to cut the metal;

s2: when metal is cut, the air extraction and collection device (4) is started to extract air outside the air extraction box (502) into the air extraction box (502) through the hose (8) and the connection box (503) to inhibit dust generated by cutting the metal, the electromagnet cover (505) and the electromagnet strip (511) are electrified to filter scrap iron entering a circular notch on the air extraction box (502), and when the air enters the collision ball (507) from the circular hole on the collision ball (507) through the collision ball (507), the collision ball (507) swings left and right under the action of the flow disturbing sheet (508) and collides with the electromagnet cover (505) and the electromagnet strip (511), so that the scrap iron is prevented from being adsorbed on the electromagnet cover (505) and the electromagnet strip (511);

s3: when the cutting blade (602) is cooled by cooling water sprayed from the water spray opening (702), the cutting blade is cooled by the second collecting frame (704), the first collecting frame (703) and the arc cover (706) block water splashed from the cutting blade (602), and when the cutting blade (602) is gradually sunk into metal, the telescopic rod (707) is contracted by the contact of the arc protrusion at the bottom end of the first collecting frame (703) and the metal surface, so that the waterproof mechanism (7) can adapt to the cutting of the metal with different thicknesses.