CN114535700A

CN114535700A - Metal band sawing machine for sheet metal processing

Info

Publication number: CN114535700A
Application number: CN202210351037.3A
Authority: CN
Inventors: 张敏
Original assignee: Kunshan Hengsheng Metal Technology Co ltd
Current assignee: Kunshan Hengsheng Metal Technology Co ltd
Priority date: 2022-04-02
Filing date: 2022-04-02
Publication date: 2022-05-27
Anticipated expiration: 2042-04-02
Also published as: CN114535700B

Abstract

The application discloses strap sawing machine for panel beating relates to panel beating processing technology field, including workstation and the sash of setting on the workstation, be equipped with driving pulley, driven pulleys and sash on the sash, driving pulley and driven pulleys rotate to be connected on the sash, be equipped with the band pulley motor on the sash, the output shaft of band pulley motor links to each other with driving pulley, be equipped with the adjustment mechanism who is used for carrying out the regulation to driven pulleys's position on the sash, establish on the driven pulleys and be used for carrying out the straining to the sash. Saw cut not hard up back many times at the saw band, can finely tune the saw band through straining device, realize the tensioning to the saw band to can guarantee to saw cut the effect.

Description

Metal band sawing machine for sheet metal processing

Technical Field

The application relates to the technical field of sheet metal processing, in particular to a metal band sawing machine for sheet metal processing.

Background

The conventional band sawing machine generally comprises a saw frame, a driving belt wheel, a driven belt wheel and a saw belt, wherein the driving belt wheel and the driven belt wheel are arranged on the saw frame, the saw belt is wound on the driving belt wheel and the driven belt wheel, and the driving belt wheel drives the saw belt to circularly move, so that the band sawing machine can complete the task of sawing a metal plate.

Aiming at the technical scheme, the inventor finds that after the saw band is subjected to multiple sawing tasks, the saw band is easy to loosen, so that the sawing effect is influenced.

Disclosure of Invention

In order to solve the problem of saw cutting effect because of the not hard up influence of saw band, this application provides a metal band sawing machine for panel beating.

The application provides a pair of strap sawing machine for panel beating adopts following technical scheme: the utility model provides a metal band sawing machine for panel beating, includes workstation and the sash of setting on the workstation, be equipped with driving pulley, driven pulleys and saw band on the sash, driving pulley and driven pulleys rotate to be connected on the sash, be equipped with the band pulley motor on the sash, the output shaft of band pulley motor links to each other with driving pulley, be equipped with the adjustment mechanism who is used for adjusting driven pulleys's position on the sash, establish the straining device who is used for carrying out the tensioning to the saw band on the driven pulleys.

By adopting the technical scheme, the distance between the driven belt wheel and the driving belt wheel can be adjusted by arranging the adjusting mechanism, so that the saw belt can be initially tensioned, and is convenient to wind the saw belt on the driving belt wheel and the driven belt wheel and then tensioned; through setting up straining device, saw cut not hard up back many times at the saw band, can finely tune the saw band, realize the tensioning to the saw band to can guarantee to saw cut the effect.

In a specific embodiment, the driven pulley comprises a plurality of tensioning blocks, a chassis and a limiting disc, the chassis is arranged on the saw frame, the plurality of tensioning blocks are arranged on the chassis in a circumferential mode, the limiting disc is arranged on the tensioning blocks, and the tensioning mechanism is arranged among the plurality of tensioning blocks.

Through adopting above-mentioned technical scheme, through setting up straining device, straining device can promote the tensioning piece, when polylith tensioning piece was kept away from each other, can finely tune the saw area, makes the saw area tensioning, helps realizing better saw cutting effect.

In a specific embodiment, the tensioning mechanism comprises a driving assembly and a positioning assembly, wherein the driving assembly is used for driving a plurality of tensioning blocks to move away from each other, and the positioning assembly is used for positioning the tensioning blocks.

Through adopting above-mentioned technical scheme, through setting up drive assembly, drive assembly can promote the tensioning piece, and through setting up locating component, locating component can fix a position the tensioning piece after promoting, avoids driving the tensioning piece to reset when driven drive rotates as far as possible, and positioning mechanism can make the saw band keep the tensioning state, realizes better saw cutting effect.

In a specific can embodiment, the drive assembly includes cam and driving motor, driving motor sets up on spacing dish, driving motor's output shaft passes spacing dish and links to each other with the cam, the tensioning piece sets up in the chassis towards one side of cam, be equipped with connecting rod and gyro wheel between tensioning piece and the cam, connecting rod one end links to each other with the tensioning piece, and the other end links to each other with the gyro wheel, the gyro wheel contradicts with the cam, the cam is used for making the tensioning piece keep away from each other.

Through adopting above-mentioned technical scheme, driving motor drives the cam and rotates, and at cam pivoted in-process, the outer fringe and the gyro wheel of cam are contradicted, and the cam outwards releases the gyro wheel to the gyro wheel drives the connecting rod and outwards releases the tensioning piece, can realize simultaneously the promotion to polylith tensioning piece, is convenient for finely tune the tensile force of saw area, makes the saw area keep the tensioning state.

In a specific can embodiment, locating component includes locating piece and position sleeve, the locating piece sets up on the chassis, seted up in the locating piece and held the chamber, it is the toper to hold the chamber, the bore that holds the chamber reduces along the direction of keeping away from the tensioning piece gradually, position sleeve sets up and is holding the intracavity, position sleeve's outer wall and the inner wall laminating of locating piece, a plurality of through-holes have been seted up on position sleeve's the lateral wall, be equipped with the ball in the through-hole, the connecting rod sets up in position sleeve.

Through adopting above-mentioned technical scheme, when the cam released the locating lever, produce the friction between locating lever and the ball, the connecting rod outwards pushed the ball, the ball drives the position sleeve simultaneously and squints towards keeping away from cam one side, when the external force was received to the tensioning piece, the tensioning piece promoted the connecting rod and removes towards being close to cam one side, drive the position sleeve and remove towards being close to cam one side, owing to it is little to hold the bore that the chamber is close to cam one side, the locating piece extrudees the ball, the ball presss from both sides the connecting rod tightly, is convenient for fix a position the connecting rod.

In a specific implementation scheme, a reset block is arranged on the chassis on one side, close to the tensioning block, of the positioning block, a reset groove is formed in one side, facing the positioning block, of the reset block, a spring groove is formed in one side, facing the reset block, of the positioning block, a spring is arranged in the spring groove, one end of the spring is abutted against the inner wall of the reset groove, and the other end of the spring is abutted against the inner wall of the spring groove.

Through adopting above-mentioned technical scheme, through setting up the spring, outwards release the connecting rod at the cam, when the connecting rod outwards released the position sleeve, position sleeve extrusion spring, the spring applyed reverse pressure to position sleeve, made the ball can press from both sides tightly the connecting rod, helped avoiding the locating lever to remove in position sleeve as far as possible.

In a specific implementation scheme, the cover is equipped with the slip ring on the connecting rod, the one end that the gyro wheel was kept away from to the connecting rod is equipped with the sliding block, the sliding tray has been seted up towards one side of cam to the tensioning piece, the sliding block set up in the sliding tray and with sliding tray sliding fit, rotate on the slip ring and be connected with the gag lever post, rotate on the gag lever post and be connected with the grip block, the grip block is equipped with the polylith and sets up in the sliding tray of sliding block both sides, be equipped with the setting element that is used for advancing line location to the slip ring on the slip ring.

Through adopting above-mentioned technical scheme, through adjusting the position of slip ring on the connecting rod, can adjust the position of grip block in the sliding tray, when the slip ring moves down, the grip block that can drive the sliding block both sides is close to each other, carry out the centre gripping at the grip block to the stopper and fix the back, fix the slip ring, can realize fixing the sliding block, the rethread setting element is fixed a position the slip ring, help avoiding the connecting rod to produce when removing as far as possible and rock, make the connecting rod remove more stably.

In a specific possible embodiment, the driven pulley is provided with a reset mechanism for driving the tensioning block to reset.

Through adopting above-mentioned technical scheme, through setting up canceling release mechanical system, after adjusting the tensioning piece, make the tensioning piece reset, the tensioning piece of being convenient for is next to be carried out the tensioning to the saw area.

In a specific implementation scheme, the reset mechanism comprises a linkage plate, a linkage cylinder and a linkage rod, wherein a reset frame is arranged on one side of the limiting disc, which is far away from the chassis, the linkage cylinder is arranged on the reset frame and faces the limiting disc, a piston rod of the linkage cylinder penetrates through the reset frame to be connected with the linkage plate, and a plurality of linkage rods are arranged on one side of the linkage plate, which faces the cam; the linkage device is characterized in that a linkage block is arranged on the side wall of the positioning sleeve, facing one side of the cam, the linkage block is arranged in a manner of inclining towards the side wall of one side of the linkage rod, the linkage rod is arranged in a manner of inclining towards the side wall of one side of the linkage block, and the linkage rod penetrates through the limiting disc and is attached to the linkage block.

By adopting the technical scheme, the linkage cylinder drives the linkage rod to move towards one side close to the cam, the linkage rod pushes the linkage block outwards, the linkage block pushes the positioning sleeve outwards, and the positioning sleeve is large in caliber at one side close to the tensioning block and is pressed to the tensioning block, so that the tensioning block can be pushed to move towards one side close to the cam, and the resetting of the tensioning block is facilitated.

In a specific embodiment, the adjusting mechanism comprises an adjusting cylinder and an adjusting slide rail, the adjusting cylinder and the adjusting slide rail are arranged on one side of the saw frame deviating from the chassis, an adjusting block is arranged in the adjusting slide rail, the adjusting block is in sliding fit with the adjusting slide rail, a piston rod of the adjusting cylinder is connected with the adjusting block, an adjusting rod is arranged on the adjusting block, a waist-shaped groove is formed in one side of the saw frame deviating from the chassis, and the adjusting rod penetrates through the waist-shaped groove to be connected with the chassis.

Through adopting above-mentioned technical scheme, adjust cylinder drives the regulating block and removes, and the regulating block drives driven pulleys and removes, is convenient for adjust the distance between driving pulley and the driven pulleys to be convenient for install and the tensioning to the saw area.

In summary, the present application includes at least one of the following beneficial technical effects:

1. by arranging the tensioning mechanism, after the saw band is loosened by sawing for many times, the saw band can be finely adjusted, so that the saw band can be tensioned, and the saw sawing effect can be ensured;

2. the drive assembly can promote the tensioning piece, and locating component can fix a position the tensioning piece after promoting, avoids driving the tensioning piece to reset when driven drive rotates as far as possible, and positioning mechanism can make the saw band keep the tensioning state, realizes better saw cutting effect.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is a schematic structural diagram of an adjusting mechanism in the embodiment of the present application.

Fig. 3 is a sectional view of the internal structure of the tension mechanism in the embodiment of the present application.

Fig. 4 is a sectional view of the internal structure of the driven pulley in the embodiment of the present application.

Fig. 5 is a partial schematic view of the internal structure of the driven pulley in the embodiment of the present application.

Fig. 6 is a schematic structural diagram of a positioning assembly in an embodiment of the present application.

Description of reference numerals:

1. a work table; 11. a saw frame; 12. a driving pulley; 13. a driven pulley; 14. a saw band; 15. a waist-shaped groove; 2. an adjustment mechanism; 20. a fixing plate; 21. an adjusting cylinder; 22. adjusting the slide rail; 23. adjusting a rod; 24. an adjusting block; 25. a moving block; 27. a moving groove; 3. a chassis; 31. a tensioning block; 4. a tensioning mechanism; 41. a drive assembly; 411. a drive motor; 412. a cam; 413. a central portion; 414. a projection; 415. a connecting rod; 416. a roller; 42. a slider; 421. a sliding groove; 422. a slip ring; 423. a limiting rod; 424. a clamping block; 425. a positioning member; 43. a positioning assembly; 431. positioning blocks; 432. a positioning sleeve; 433. an accommodating chamber; 434. a ball bearing; 435. a reset block; 436. a reset groove; 437. a spring slot; 438. a spring; 439. a through hole; 51. a limiting disc; 6. a reset mechanism; 61. a linkage plate; 62. a linkage cylinder; 63. a linkage rod; 64. a linkage block; 65. a reset frame; 7. a support rail; 71. a support block; 72. and a support groove.

Detailed Description

The present application is described in further detail below with reference to the attached drawings.

The embodiment of the application discloses metal band sawing machine for sheet metal working, refer to fig. 1, metal band sawing machine for sheet metal working includes workstation 1 and the sash 11 of setting on workstation 1, is equipped with driving pulley 12, driven pulleys 13 and saw band 14 on the sash 11, and driving pulley 12 and driven pulleys 13 interval set up on sash 11, and saw band 14 is around adorning on driving pulley 12 and driven pulleys 13. A belt wheel motor (not shown in the figure) is fixed on the saw frame 11 on one side of the driving belt wheel 12, the belt wheel motor is fixed inside the saw frame 11, an output shaft of the belt wheel motor is coaxially fixed with the driving belt wheel 12, the driving belt wheel 12 is driven to rotate by the belt wheel motor, the driving belt wheel 12 drives the saw belt 14 and the driven belt wheel 13 to rotate, and the saw belt 14 realizes the sawing of the metal plate in the rotating process.

Referring to fig. 2, the saw frame 11 on the driven pulley 13 side is provided with an adjusting mechanism 2, and the adjusting mechanism 2 is used for adjusting the position of the driven pulley 13. Adjustment mechanism 2 includes adjustment cylinder 21 and a plurality of regulation slide rail 22, and adjustment cylinder 21 and regulation slide rail 22 are fixed on the lateral wall that the sash 11 deviates from driven pulley 13 one side, and adjustment cylinder 21 sets up towards regulation slide rail 22 one side. The adjusting slide rails 22 are provided with two adjusting blocks and are transversely arranged on the side walls of the saw frame 11, the adjusting slide rails 22 are connected with adjusting blocks 24 in a sliding mode, moving blocks 25 are fixed on the adjusting blocks 24, moving grooves 27 are formed in the adjusting slide rails 22, and the moving blocks 25 are arranged in the moving grooves 27 and are in sliding fit with the moving grooves 27. The piston rod of the adjusting cylinder 21 is fixedly connected with the adjusting block 24. An adjusting rod 23 is fixed on the adjusting block 24, a waist-shaped groove 15 is formed in the side wall of one side, away from the driven belt wheel 13, of the saw frame 11, the waist-shaped groove 15 is transversely arranged, and the adjusting rod 23 penetrates through the waist-shaped groove 15 to be connected with the driven belt wheel 13 in a rotating mode.

Referring to fig. 2, the piston rod of the adjusting cylinder 21 extends out to push the adjusting block 24 to move close to the driving pulley 12, so as to drive the driven pulley 13 to move towards one side close to the driving pulley 12, and when the distance between the driving pulley 12 and the driven pulley 13 is short, the saw belt 14 is conveniently sleeved on the driving pulley 12 and the driven pulley 13. After the saw belt 14 is sleeved on the driving belt wheel 12 and the driven belt wheel 13, the piston rod of the adjusting cylinder 21 contracts, and the adjusting cylinder 21 drives the driven belt wheel 13 to move towards one side far away from the driving belt wheel 12, so that the saw belt 14 is primarily tensioned.

Referring to fig. 2, two support rails 7 are fixed on a side wall of the saw frame 11 facing one side of the driven pulley 13, a support block 71 is arranged between the support rails 7, the support block 71 is in sliding fit with the support rails 7, a support groove 72 is formed in one side of the driven pulley 13 facing the support rails 7, and the support block 71 is arranged in the support groove 72 and is rotatably connected with the support groove 72. When the driven pulley 13 moves, the support rail 7 can guide the driven pulley 13, and by disposing the support block 71 in the support groove 72, the support block 71 can support the driven pulley 13, and the connection of the driven pulley 13 can be stabilized.

Referring to fig. 2 and 3, the driven pulley 13 includes a chassis 3, a plurality of tensioning blocks 31 provided on the chassis 3, and a stopper disc 51 fixed to the tensioning blocks 31, the stopper disc 51 being provided coaxially with the chassis 3. The diameters of the limiting disc 51 and the chassis 3 are larger than the outer diameter of the tensioning block 31, the saw belt 14 is wound on the tensioning block 31 between the chassis 3 and the limiting disc 51, the limiting disc 51 and the chassis 3 can limit the saw belt 14, and the saw belt 14 is prevented from falling off from the driven belt wheel 13 as much as possible. The chassis 3 is rotatably connected to the supporting block 71, the plurality of tensioning blocks 31 are circumferentially arranged on the chassis 3 and are in sliding fit with the chassis 3, the chassis 3 is provided with the tensioning mechanism 4, and the tensioning mechanism 4 is used for pushing the tensioning blocks 31 to approach or depart from each other. The tensioning mechanism 4 comprises a driving assembly 41 and a positioning assembly 43, wherein the driving assembly 41 is arranged between a plurality of tensioning blocks 31 and is used for pushing the tensioning blocks 31 to tension the saw band 14; the positioning assemblies 43 are provided in a plurality of sets, and each set of positioning assemblies 43 is used for positioning each tensioning block 31.

Referring to fig. 3, the driving assembly 41 includes a cam 412 and a driving motor 411, the driving motor 411 is fixed on the limiting disc 51, the cam 412 is disposed on one side of the chassis 3 facing the driving motor 411, the cam 412 is rotatably connected with the adjusting rod 23, an output shaft of the driving motor 411 passes through the limiting disc 51 and is coaxially fixed with the cam 412, and the driving motor 411 drives the cam 412 to rotate.

Referring to fig. 4, the cam 412 includes a central portion 413 and a protruding portion 414, the central portion 413 and the protruding portion 414 are fixedly connected, in this embodiment, the central portion 413 is disposed in a circular shape, and the protruding portions 414 are disposed in four and circumferentially arranged on a side wall of the central portion 413. A connecting rod 415 and a roller 416 are arranged between the tensioning block 31 and the cam 412, one end of the connecting rod 415 is connected with the tensioning block 31, the other end of the connecting rod 415 is rotatably connected with the roller 416, and the roller 416 is abutted against the outer wall of the protruding part 414 of the cam 412. The driving motor 411 drives the cam 412 to rotate, the cam 412 drives the roller 416 and the connecting rod 415 to push out the tensioning block 31, the tensioning block 31 is positioned through the positioning assembly 43 after being pushed out, when the saw band 14 is loosened, the tensioning block 31 is pushed out outwards, fine adjustment of the saw band 14 can be achieved, the saw band 14 is tensioned, and better sawing effect is achieved.

Referring to fig. 5, a sliding block 42 is fixed to one end of the connecting rod 415 away from the roller 416, a sliding groove 421 is opened on one side of the tensioning block 31 facing the cam 412, and the sliding block 42 is disposed in the sliding groove 421 and is in sliding fit with the sliding groove 421. The cover is equipped with slip ring 422 on the connecting rod 415, and the last articulated two gag lever posts 423 that have of slip ring 422, rotates on every gag lever post 423 and is connected with grip block 424, and grip block 424 sets up in sliding tray 421 and sets up respectively in the both sides of sliding block 42. Be equipped with the setting element 425 on the slip ring 422, setting element 425 is used for fixing a position the slip ring 422, and setting element 425 specifically is the bolt, and the bolt is with slip ring 422 screw-thread fit, supports tightly through bolt and connecting rod 415 and can carry out spacingly to the slip ring 422. Through removing the slip ring 422, when the slip ring 422 moves towards the one end that is close to gyro wheel 416, the gag lever post 423 in slider 42 both sides drives the slip ring 422 and is close to each other, carries out the centre gripping to slider 42, fixes the slip ring 422 through the bolt behind the centre gripping to can realize the fixed to slider 42.

Referring to fig. 6, the positioning assembly 43 includes a positioning block 431 and a positioning sleeve 432, the positioning block 431 is fixed on one side of the chassis 3 facing the cam 412, a containing cavity 433 is formed in the positioning block 431, the containing cavity 433 is tapered, the aperture of the containing cavity 433 is gradually reduced along a direction close to the cam 412, the positioning sleeve 432 is arranged in the positioning block 431 and penetrates through the positioning block 431, and the outer wall of the positioning sleeve 432 is attached to the inner wall of the positioning block 431. A plurality of through holes 439 are formed in the side wall of the positioning sleeve 432, and balls 434 are arranged in the through holes 439. One side of the positioning block 431, which is far away from the roller 416, is provided with a reset block 435, one side of the reset block 435, which faces the positioning block 431, is provided with a reset groove 436, one side of the positioning sleeve 432, which faces the reset block 435, is provided with a spring 437, the reset groove 436 is internally provided with a spring 438, one end of the spring 438 abuts against the inner wall of the reset groove 436, and the other end of the spring 438 abuts against the inner wall of the spring groove 437.

Referring to fig. 3, the driving motor 411 drives the cam 412 to rotate, so as to push the roller 416 and the connecting rod 415 outward, and during the pushing process, the connecting rod 415 pushes the ball 434 outward, and the ball 434 drives the positioning sleeve 432 to move toward the side away from the roller 416. When the tensioning block 31 is squeezed by an external force, the tensioning block 31 pushes the connecting rod 415 to move towards one side of the cam 412, the connecting rod 415 rubs against the balls 434, the balls 434 drive the positioning sleeve 432 to move towards one side close to the cam 412, and as the caliber of the positioning sleeve 432 gradually becomes smaller, the balls 434 squeeze the connecting rod 415 to clamp the connecting rod 415.

Referring to fig. 3, a reset frame 65 is fixed on one side of the limiting disc 51 away from the chassis 3, a reset mechanism 6 for driving the tensioning block 31 to reset is arranged on the limiting disc 51, the reset mechanism 6 includes a linkage plate 61, a linkage cylinder 62 and linkage rods 63, the linkage cylinder 62 is fixed on the reset frame 65 and arranged toward the limiting disc 51, piston rods of the linkage cylinder 62 penetrate through the reset frame to be connected with the linkage plate 61, the linkage rods 63 are fixed on one side of the linkage plate 61 facing the cam 412, and the linkage rods 63 are provided with a plurality of groups, specifically four in this embodiment; a linkage block 64 is fixed on the side wall of the positioning sleeve 432 facing the cam 412, the linkage block 64 is obliquely arranged facing the side wall of the linkage rod 63, the linkage rod 63 is obliquely arranged facing the side wall of the linkage block 64, and the linkage rod 63 passes through the limiting disc 51 and is attached to the linkage block 64.

Referring to fig. 3, when the tensioning block 31 needs to be reset, the piston rod of the linkage cylinder 62 contracts, the linkage cylinder 62 drives the linkage plate 61 and the linkage rod 63 on the linkage plate 61 to move towards the side close to the chassis 3, the linkage rod 63 pushes the linkage block 64 to move towards the side far from the cam 412, and the linkage block 64 pushes the positioning sleeve 432 outwards, so that the tensioning block 31 can be reset by pressing the tensioning block 31 inwards.

The implementation principle of the embodiment of the application is as follows: the position of the driven belt wheel 13 is adjusted through the adjusting cylinder 21, when the driven belt wheel 13 is close to the driving belt wheel 12, the saw belt 14 is sleeved on the driving belt wheel 12 and the driven belt wheel 13, the driven belt wheel 13 is driven by the adjusting cylinder 21 to be far away from the driving belt wheel 12, and the saw belt 14 is primarily tensioned. After the sawing belt 14 is loosened by multiple times of sawing, the driving motor 411 drives the cam 412 to rotate, so that the plurality of tensioning blocks 31 are far away from each other, and the tensioning blocks 31 finely adjust the sawing belt 14, so that the sawing belt 14 is kept in a tensioning state. The linkage cylinder 62 drives the linkage plate 61 to move towards one side close to the cam 412, the linkage rods 63 drive the linkage blocks 64 to be away from each other, the linkage blocks 64 push the positioning sleeve 432 outwards, pressure is applied to the tensioning blocks 31 at the moment, the tensioning blocks 31 are close to each other, the tensioning blocks 31 can be reset, and next operation is facilitated.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a strap sawing machine for sheet metal working, includes workstation (1) and saw frame (11) of setting on workstation (1), be equipped with driving pulley (12), from the driven pulleys (13) and saw band (14) on saw frame (11), driving pulley (12) and from the driven pulleys (13) rotate to be connected on saw frame (11), be equipped with the band pulley motor in saw frame (11), the output shaft of band pulley motor links to each other its characterized in that with driving pulley (12): the saw frame (11) is provided with an adjusting mechanism (2) for adjusting the position of a driven belt wheel (13), and the driven belt wheel (13) is provided with a tensioning mechanism (4) for tensioning a saw belt (14).

2. The metal band sawing machine for sheet metal working according to claim 1, wherein: driven pulley (13) include polylith tensioning block (31), chassis (3) and spacing dish (51), chassis (3) set up on sash (11), the polylith tensioning block (31) circumference is arranged on chassis (3), spacing dish (51) set up on tensioning block (31), straining device (4) set up between polylith tensioning block (31).

3. The metal band sawing machine for sheet metal working according to claim 2, wherein: the tensioning mechanism (4) comprises a driving assembly (41) and a positioning assembly (43), the driving assembly (41) is used for driving the tensioning blocks (31) to move away from each other, and the positioning assembly (43) is used for positioning the tensioning blocks (31).

4. The metal band sawing machine for sheet metal working according to claim 3, wherein: drive assembly (41) includes cam (412) and driving motor (411), driving motor (411) set up on spacing dish (51), the output shaft of driving motor (411) passes spacing dish (51) and links to each other with cam (412), tensioning block (31) set up in chassis (3) one side towards cam (412), be equipped with connecting rod (415) and gyro wheel (416) between tensioning block (31) and cam (412), connecting rod (415) one end links to each other with tensioning block (31), and the other end links to each other with gyro wheel (416), gyro wheel (416) contradict with cam (412), cam (412) are used for making tensioning block (31) keep away from each other.

5. The metal band sawing machine for sheet metal working according to claim 4, wherein: locating component (43) includes locating piece (431) and locating sleeve (432), locating piece (431) sets up on chassis (3), it holds chamber (433) to have seted up in locating piece (431), it is the toper to hold chamber (433), the bore that holds chamber (433) reduces along the direction of keeping away from tensioning block (31) gradually, locating sleeve (432) set up in holding chamber (433), the outer wall of locating sleeve (432) and the inner wall laminating of locating piece (431), a plurality of through-holes (439) have been seted up on the lateral wall of locating sleeve (432), be equipped with ball (434) in through-hole (439), connecting rod (415) sets up in locating sleeve (432).

6. The metal band sawing machine for sheet metal working according to claim 5, wherein: the positioning block (431) is provided with a reset block (435) on the chassis (3) close to one side of the tensioning block (31), the reset groove (436) is formed in one side, facing the positioning block (431), of the reset block (435), the spring groove (437) is formed in one side, facing the reset block (435), of the positioning block (431), the spring groove (438) is formed in the spring groove (437), one end of the spring (438) is abutted to the inner wall of the reset groove (436), and the other end of the spring is abutted to the inner wall of the spring groove (437).

7. The metal band sawing machine for sheet metal working according to claim 4, wherein: the cover is equipped with slip ring (422) on connecting rod (415), the one end that gyro wheel (416) were kept away from in connecting rod (415) is equipped with sliding block (42), sliding tray (421) have been seted up towards one side of cam (412) in tensioning piece (31), sliding block (42) set up in sliding tray (421) and with sliding tray (421) sliding fit, it is connected with gag lever post (423) to rotate on slip ring (422), rotates on gag lever post (423) and is connected with grip block (424), and grip block (424) are equipped with the polylith and set up in sliding tray (421) of sliding block (42) both sides, be equipped with the setting element that is used for carrying out the location to slip ring (422) on slip ring (422).

8. The metal band sawing machine for sheet metal working according to claim 5, wherein: and a reset mechanism (6) for driving the tensioning block (31) to reset is arranged on the driven belt wheel (13).

9. The metal band sawing machine for sheet metal working according to claim 8, wherein: the resetting mechanism (6) comprises a linkage plate (61), a linkage cylinder (62) and a linkage rod (63), a resetting frame (65) is arranged on one side, away from the chassis (3), of the limiting disc (51), the linkage cylinder (62) is arranged on the resetting frame (65) and faces the limiting disc (51), a piston rod of the linkage cylinder (62) penetrates through the resetting frame (65) to be connected with the linkage plate (61), and a plurality of linkage rods (63) are arranged on one side, facing the cam (412), of the linkage plate (61); the positioning sleeve (432) is provided with linkage block (64) on the lateral wall towards cam (412) one side, linkage block (64) sets up towards the lateral wall slope of gangbar (63) one side, gangbar (63) sets up towards the lateral wall slope of gangbar (64) one side, gangbar (63) pass spacing dish (51) and linkage block (64) laminating.

10. The metal band sawing machine for sheet metal working according to claim 4, wherein: adjustment mechanism (2) are including adjusting cylinder (21) and regulation slide rail (22), waist type groove (15) have been seted up to one side that saw frame (11) deviate from chassis (3), the one end of keeping away from cam (412) in regulation pole (23) is equipped with regulating block (24), regulating block (24) and regulation slide rail (22) sliding fit, adjusting cylinder (21) set up on saw frame (11), the output shaft of adjusting cylinder (21) links to each other with regulating block (24).