CN211758227U - Steel bar cutting machine - Google Patents

Abstract

The utility model relates to a steel bar cutting machine, which comprises a bod, the organism internal fixation has the driving piece, be provided with fixed sword and removal sword relatively on the organism, it is driven by the driving piece to remove the sword, be provided with the workstation on the organism of the bottom of fixed sword and removal sword, organism one side is provided with the baffle, the baffle is close to one side of organism the spacing groove of having seted up, spacing groove position forms the spacing chamber that supplies the reinforcing bar to place between cell wall and the briquetting of briquetting downside, the spacing inslot slides along upper and lower direction and is connected with the briquetting, the top of briquetting is fixed with the pull rod, the other end of pull rod articulates there is the. The utility model discloses have the effect that improves machining efficiency, improvement security.

Description

Steel bar cutting machine

Technical Field

The utility model belongs to the technical field of the technique of reinforcing bar processing equipment and specifically relates to a bar cutter is related to.

Background

A tool for shearing a steel bar in a steel bar shearing machine. The fixed-length cutting device is one of indispensable devices for processing reinforcing steel bars, and is mainly used for fixed-length cutting of the reinforcing steel bars in buildings, bridges, tunnels, power stations, large-scale water conservancy projects and the like. Compared with other cutting equipment, the steel bar cutting machine has the characteristics of light weight, less energy consumption, reliable work, high efficiency and the like, so that the steel bar cutting machine is widely applied to back-off machining, small steel rolling mills and the like gradually in recent years, and plays an important role in various fields of national economic construction.

The existing Chinese patent with publication number CN208628334U discloses a steel bar cutting machine, which comprises a machine body, wherein a cutting opening is arranged on the machine body, a horizontal groove is arranged on the machine body, one end of the horizontal groove, which is close to the cutting opening, is hinged with a graduated scale, a baffle is arranged on the graduated scale, and the baffle is perpendicular to the graduated scale and is connected with the graduated scale in a sliding manner.

The above prior art solutions have the following drawbacks: the reinforcing bar cuts off through the fracture, and wherein the fracture comprises two swoves, and in the cutting process, two crisscross cutting of sword, reinforcing bar atress are the slant atress, and the reinforcing bar takes place the skew easily, probably takes place the striking with baffle and scale, also can injure the staff, has the potential safety hazard.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a bar cutter, have the advantage that the security that improves equipment used that the reinforcing bar emergence skew of waiting in the prevention cutting is not enough to prior art exists, the utility model aims at providing a bar cutter.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the utility model provides a steel bar cutting machine, includes the organism, the organism is internal to be fixed with the driving piece, be provided with fixed sword and removal sword on the organism relatively, it is driven by the driving piece to move the sword, be provided with the workstation on the organism of the bottom of fixed sword and removal sword, organism one side is provided with the baffle, the baffle is close to the spacing groove of having seted up of one side of organism, spacing groove position forms the spacing chamber that supplies the reinforcing bar to place between cell wall and the briquetting of briquetting downside, the spacing inslot slides along upper and lower direction and is connected with the briquetting, the top of briquetting is fixed with the pull rod, the other end of pull rod articulates there is the control rod.

Through adopting above-mentioned technical scheme, during the use, will wait to cut off the reinforcing bar and place between stationary knife and removal sword, push down the control rod, it rises to drive the pull rod, thereby it upwards slides along the spacing inslot lateral wall to drive the briquetting, will wait to cut the one end butt of reinforcing bar at the tank bottom of spacing groove, loosen the control rod, the pull rod is descended by the effect of gravity of piece, the while briquetting slides downwards along the spacing inslot lateral wall, the bottom butt of briquetting is waiting to cut reinforcing bar lateral wall, it carries out the centre gripping to treat cutting reinforcing bar, prevent to treat that cutting reinforcing bar takes place the skew when the cutting, the security that improve equipment used.

The utility model discloses further set up to: the organism is provided with the subassembly that slides that is used for driving the baffle to remove, the subassembly that slides includes along vertical movement sword moving direction set up in the fifth spout of two parallels each other between workstation and the organism, slide and connect in the catch bar of fifth spout, and the one end and the baffle of catch bar are fixed.

Through adopting above-mentioned technical scheme, the promotion of catch bar drives the baffle and removes to adjust the distance between removal sword and the baffle.

The utility model discloses further set up to: a supporting plate is fixed on the machine body above the fixed knife and the movable knife, a tape measure is fixed on the upper surface of the supporting plate, and a tape measure hook of the tape measure is fixed on the baffle through a screw.

Through adopting above-mentioned technical scheme, fix the chi hook of tape measure on the baffle, the length of book strip can be flexible along with the removal that the catch bar drove the baffle, measures the distance between removal sword to the baffle.

The utility model discloses further set up to: be provided with the fixed subassembly that fixes the subassembly that slides on the organism, fixed subassembly is including the U type groove that is fixed in fifth spout one end, wear to locate the bolt of U type groove lateral wall and the rubber slab that is located one side that the bolt wore to establish U type groove, the opening in U type groove makes progress, the catch bar passes U type groove and slides with the fifth spout and is connected, bolt and U type groove lateral wall threaded connection.

Through adopting above-mentioned technical scheme, waiting to cut the reinforcing bar and slide when the catch bar drives, detect through the tape measure by butt board to the stationary knife between wait to cut reinforcing bar length when for the length of processing, to the U type inslot tight bolt of screwing, the rubber slab butt drives the catch bar butt at the lateral wall in U type groove, forms fixedly to the catch bar, and the rubber slab increases the frictional force between butt board and the catch bar, strengthens fixed effect.

The utility model discloses further set up to: the control rod comprises a front control rod and a rear control rod, the two ends of the front control rod are hinged to the pull rod and the rear control rod respectively, first sliding grooves are formed in the side walls of the two sides of the front control rod, second sliding grooves are formed in the side walls of the two sides of the rear control rod, a first rotation stopping block is connected with the first sliding grooves in a sliding mode and the second sliding grooves in a sliding mode, and the length of the first rotation stopping block is at least smaller than that of any one of the first sliding grooves or the two sliding grooves of the second sliding grooves.

Through adopting above-mentioned technical scheme, when the bar cutter was in operating condition, the back pole of will manipulating rotated to with the same water flat line of the preceding pole of manipulation, with first only revolve the piece by first spout or second spout position, slide to half and be located first spout and half and be located the position of second spout, the restriction is manipulated the back pole and is rotated downwards around articulated preceding pole, makes things convenient for the control lever to remove along with the removal of catch bar.

The utility model discloses further set up to: the catch bar is including promoting preceding pole and promotion back pole, the one end of pole is fixed with the baffle before promoting, the pole other end is articulated with the promotion back pole before promoting, the third spout has been seted up to the both sides lateral wall of pole before promoting, the fourth spout has been seted up to the both sides lateral wall of promotion back pole, third spout and fourth spout slide and are connected with the second and end the piece of revolving, the length that the second ended the piece of revolving is less than the length of any one in two spouts of third spout or fourth spout.

Through adopting above-mentioned technical scheme, when the bar cutter was in operating condition, will promote the back pole and rotate to the same water flat line with the pole before promoting, stop the piece with the second and revolve the piece by third spout or fourth spout position, slide to the first stop and revolve the position that the piece half is located the third spout and half is located the fourth spout to the first, the restriction promotes the back pole and rotates around promoting the pole downwards before, makes things convenient for the catch bar to promote the baffle and removes.

The utility model discloses further set up to: the installation groove has been seted up along length direction both sides lateral wall to the back pole of manipulation, the embedded barrier rod that is equipped with of mounting groove, barrier rod one end articulates in the mounting groove inside wall, the fixed slot that supplies barrier rod scarf joint is seted up to the pole after promoting, the barrier rod can be put into in the fixed slot.

Through adopting above-mentioned technical scheme, when bar cutter needs to remove, drive the baffle butt at the organism lateral wall through the pulling catch bar, pole and manipulation rear rod before the manipulation, the pin joint of pole and promotion rear rod all is located the organism side before the promotion, with first only the piece that revolves slide in before the manipulation completely, the second only the piece that revolves slide in before the promotion completely, the pole rotates downwards after the manipulation, the pole upwards rotates after the promotion, the separation pole gets into in the fixed slot, will promote rear rod and manipulation rear rod and carry out spacing each other.

The utility model discloses further set up to: the side wall of the machine body is fixed with a rotating shaft, the rotating shaft is rotatably connected with a blocking plate, the side wall of the machine body is fixed with a limiting rod, and the limiting rod limits the blocking plate to rotate.

Through adopting above-mentioned technical scheme, rotate the baffler butt at articulated back pole upper surface, with the gag lever post butt simultaneously, will articulate the back pole and promote the back pole and fix at the organism lateral wall.

The utility model discloses further set up to: the supporting plate is fixed with a supporting rod, the other end of the supporting rod is fixed with a U-shaped seat, and the side wall of the operating rod is arranged inside the U-shaped seat.

Through adopting above-mentioned technical scheme, through the bracing piece with control lever separation department backup pad, U type seat restriction control lever and bracing piece take place to break away from simultaneously, more conveniently handle pushing down of back pole.

To sum up, the utility model discloses a following at least one useful technological effect:

through setting up the baffle, treat to cut off the reinforcing bar and realize fixing, take place the skew when preventing that the reinforcing bar from cutting off, injury staff, the security that improve equipment used.

Through setting up the tape measure, the batching strip can move along with the removal that the catch bar drove the baffle, and the length of waiting to cut the reinforcing bar is measured in real time, has reduced measuring error to improve the machining precision.

Through setting up the rubber slab, because of too little with the area of contact of catch bar when preventing the bolt precession, the lateral wall of catch bar is damaged too greatly to frictional force, influences sliding of catch bar and spout, and the rubber slab is discoid simultaneously, makes things convenient for the bolt precession.

Drawings

Fig. 1 is an axial view of the overall structure of the present invention in an operating state.

Fig. 2 is a connection diagram of the internal structure in the working state of the present invention.

Fig. 3 is a connection diagram of the internal structure in the moving state of the present invention.

In the figure, 1, a machine body; 2. fixing a knife; 3. moving the knife; 4. a universal wheel; 5. a baffle plate; 51. a limiting groove; 52. briquetting; 53. a spring; 54. a pull rod; 55. a joystick; 551. operating the front lever; 552. operating the rear lever; 56. a support bar; 57. a U-shaped seat; 6. a work table; 7. a slipping component; 71. a fifth chute; 72. a push rod; 721. pushing the front rod; 722. pushing the rear rod; 8. a fixing assembly; 81. a U-shaped groove; 82. a rubber plate; 83. a bolt; 9. a support plate; 10. a tape measure; 11. a first chute; 12. a second chute; 13. a first rotation stopping block; 14. a third chute; 15. a fourth chute; 16. a second rotation stopping block; 17. mounting grooves; 18. a blocking rod; 19. fixing grooves; 20. a rotating shaft; 21. a barrier plate; 22. a limiting rod.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for the utility model discloses a steel bar cutting machine, including organism 1, be provided with the driving piece in the organism 1, the driving piece is the pneumatic cylinder, is provided with stationary knife 2 and removal sword 3 relatively on the organism 1, and removal sword 3 is driven by the driving piece. The bottom of the machine body 1 is provided with universal wheels 4, which facilitate the movement of the steel bar cutting machine. One side of the machine body 1 is provided with a baffle 5, and the baffle 5 is just opposite to a cutting opening formed by the fixed knife 2 and the movable knife 3. Be fixed with workstation 6 on the organism 1 of fracture bottom, 6 bottoms of workstation are provided with the subassembly 7 that slides that is used for driving baffle 5 to remove, and 6 bottoms of workstation still are provided with the fixed subassembly 8 of subassembly 7 that will slide. Be fixed with backup pad 9 on the organism 1 at incision top, backup pad 9 upper surface is fixed with tape measure 10, tape measure 10's angle sign indicating number passes through the fix with screw in the one side of keeping away from organism 1 of baffle 5, and the zero scale mark of book strip just is located reinforcing bar and baffle 5's butt department. During the use, drive baffle 5 through subassembly 7 that slides, the synchronous tensile of rolling up the strip that drives, the length of cutting off of the scale through on the rolling up the strip can be known, when the reinforcing bar cuts off the length requirement that length accords with processing, it is fixed through subassembly 8 that will slide subassembly 7, thereby fixed stop 5's position, the reinforcing bar that will wait to cut is put into and is cut the fracture, the one end butt of waiting to cut the reinforcing bar is on baffle 5, fix the area cutting reinforcing bar through baffle 5, it removes to mutual butt to 2 place directions of stationary knife to move sword 3 through the driving piece drive, accomplish cutting off of reinforcing bar. When cutting the reinforcing bar of the same length once more, only need with reinforcing bar butt on baffle 5, can cut, whole process has fixed the reinforcing bar, prevents the reinforcing bar skew, reduces the potential safety hazard.

Referring to fig. 1 and 2, a limiting groove 51 is provided on one side of the baffle 5 close to the machine body 1, a pressing block 52 is slidably connected in the limiting groove 51 along the up-down direction, the limiting groove 51 is located between a groove wall of the pressing block 52 on the lower side and the pressing block 52 to form a limiting cavity for placing reinforcing steel bars, a spring 53 is connected between the upper surface of the pressing block 52532 and the upper portion of the limiting groove 51 in a butting manner, a pull rod 54 is fixed at the top end of the pressing block 52, an operating lever 55 is hinged to the other end of the pull rod 54, a support rod 56 is fixed on the upper surface of the support plate 9, a U-shaped seat 57 is fixed at the top end of the. During the use, push down control rod 55 in the one side of waiting to cut the reinforcing bar and putting into, form lever principle through bracing piece 56, pull rod 54 upwards is pulled up, drive briquetting 52 upwards and slide, the one end butt of the reinforcing bar that will wait to cut off is between briquetting 52 lower surface and spacing groove 51 bottom, loosen pull rod 54, spring 53 drives pull rod 54 and briquetting 52 and slides downwards, the lower surface of briquetting 52 and spacing groove 51 bottom simultaneously with wait to cut reinforcing bar lateral wall butt, the one end butt of reinforcing bar is at spacing groove 51 tank bottom simultaneously, the completion is treated the fixed of cutting the reinforcing bar.

Referring to fig. 1 and 2, the sliding assembly 7 includes two parallel fifth sliding grooves 71 arranged between the workbench 6 and the machine body 1 along the moving direction of the vertically moving knife 3 and a push rod 72 connected to the fifth sliding grooves 71 in a sliding manner, the push rod 72 slides to drive the baffle 5 to move, and the distance between the baffle 5 and the fixed knife 2 is adjusted, so as to adjust the length of the steel bar to be cut.

Referring to fig. 1 and 2, the fixing assembly 8 includes a U-shaped groove 81 fixed at one end of the fifth sliding groove 71, a bolt 83 penetrating through a side wall of the U-shaped groove 81, and a rubber plate 82 fixed at one side of the U-shaped groove 81 where the bolt 83 is located, an opening of the U-shaped groove 81 faces upward, the rubber plate 82 is disc-shaped, the push rod 72 penetrates through the U-shaped groove 81 to be connected with the fifth sliding groove 71 in a sliding manner, and the bolt 83 is in threaded connection with a side wall of the U-shaped groove 81. When catch bar 72 drives and waits to cut the reinforcing bar and slide, detect through tape measure 10 and wait to cut reinforcing bar length by butt plate to stationary knife 2 when for the length of processing of will, to the internal tight bolt 83 of screwing of U type groove 81, rubber slab 82 butt is at the catch bar 72 lateral wall, drives catch bar 72 butt at the lateral wall of U type groove 81, and it is fixed to form catch bar 72, and rubber slab 82 increases the frictional force between butt plate and the catch bar 72, strengthens fixed effect.

Referring to fig. 2 and 3, the operating lever 55 is divided into a front operating lever 551 and a rear operating lever 552, and one end of the front operating lever 551 is hinged to the pull rod 54. Two ends of the front operating rod 551 are hinged to the pull rod 54 and the rear operating rod 552 respectively, two side walls of the front operating rod 551 are provided with first sliding grooves 11, two side walls of the rear operating rod 552 are provided with second sliding grooves 12, the first sliding grooves 11 and the second sliding grooves 12 are connected with first rotation stopping blocks 13 in a sliding mode, and the length of the first rotation stopping blocks 13 is smaller than that of the first sliding grooves 11. When the steel bar cutting machine is in a working state, the rear operating rod 552 is rotated to be in the same horizontal line with the front operating rod 551, the first rotation stopping block 13 slides to a position that one half of the first rotation stopping block is positioned in the first sliding groove 11 and the other half of the first rotation stopping block is positioned in the second sliding groove 12 from the position of the first sliding groove 11, the downward rotation of the rear operating rod 552 around the front operating rod 551 is limited, and the operating rod 55 can move conveniently along with the movement of the pushing rod 72.

Referring to fig. 3, the push rod 72 is divided into a front push rod 721 and a rear push rod 722, one end of the front push rod 721 is fixed to the baffle 5, the other end of the front push rod 721 is hinged to the rear push rod 722, third sliding grooves 14 are formed in side walls of two sides of the front push rod 721, fourth sliding grooves 15 are formed in side walls of two sides of the rear push rod 722, a second rotation stopping block 16 is connected to the third sliding grooves 14 and the fourth sliding grooves 15 in a sliding manner, and the length of the second rotation stopping block 16 is smaller than that of the third sliding grooves 14. When the steel bar cutting machine is in a working state, the pushing rear rod 722 rotates to be at the same horizontal line with the pushing front rod 721, the second rotation stopping block 16 slides to the position where one half of the first rotation stopping block 13 is located in the third sliding groove 14 and the other half is located in the fourth sliding groove 15 from the position of the third sliding groove 14, the pushing rear rod 722 is limited to rotate downwards around the pushing front rod 721, and the pushing rod 72 is convenient to push the baffle 5 to move.

Referring to fig. 3, the installation groove 17 has been seted up along length direction's both sides lateral wall to control back pole 552, the embedded barrier rod 18 that is equipped with of installation groove 17, the one end of barrier rod 18 articulates in installation groove 17 inside wall, the fixed slot 19 that supplies barrier rod 18 scarf joint is seted up to promotion back pole 722, in fixed slot 19 can be put into to barrier rod 18, the lateral wall of organism 1 is fixed with axis of rotation 20, axis of rotation 20 rotates and is connected with baffler 21, organism 1 lateral wall is fixed with gag lever post 22, gag lever post 22 restriction baffler 21's rotation. When the steel bar cutting machine needs to move, the pushing rod 72 is pulled to drive the baffle 5 to abut against the side wall of the machine body 1, hinged points of the front operating rod 551, the rear operating rod 552, the front pushing rod 721 and the rear pushing rod 722 are located on the side edge of the machine body 1, the first rotation stopping block 13 completely slides into the front operating rod 551, the second rotation stopping block 16 completely slides into the front pushing rod 721, the rear operating rod 552 rotates downwards, the rear pushing rod 722 rotates upwards, the blocking rod 18 enters the fixing groove 19, the rotation blocking plate 21 abuts against the upper surface of the rear hinged rod and abuts against the limiting rod 22, the rear operating rod 552 and the rear pushing rod 722 are fixed on the side wall of the machine body 1, the size of the machine body 1 during moving is reduced, and the space movement limitation of the steel bar cutting machine is reduced.

The implementation principle of the embodiment is as follows:

when in a working state:

pushing the pushing rod 72 to slide along the sliding rail to the direction of the baffle 5, and screwing the bolt 83 to fix the pushing rod 72 when the pushing rod 72 drives the baffle 5 to slide until the distance from the zero scale mark of the coil strip to the fixed cutter 2 is the requirement of the processing length of the steel bar to be cut; one end of the operating lever 55, which is far away from the pull rod 54, is pressed downwards, the operating lever 55 drives the pull rod 54 to rise, so that the press block 52 is driven to move upwards, one end of the steel bar to be cut extends between the fixed knife 2 and the movable knife 3 and abuts against the bottom of the limiting groove 51 on the baffle 5; the movable knife 3 is driven by the driving piece to move towards the fixed knife 2, and the movable knife 3 and the fixed knife 2 are mutually abutted to cut off the steel bars to be cut; later when processing the reinforcing bar that the same length required, only need press the one end of control rod 55 down, drive pull rod 54 upwards the pulling, will wait to cut the bottom of one end butt at spacing groove 51 of reinforcing bar, loosen the pressure to control rod 55 one end, spring 53 drives pull rod 54 downstream, wait to cut the lateral wall of reinforcing bar and respectively the butt at the lateral wall of briquetting 52 and spacing groove 51, form spacingly, drive movable sword 3 through the drive driving piece and remove to fixed sword 2 direction, movable sword 3 and fixed sword 2 butt each other, treat that the reinforcing bar of cutting off, need not carry out many times again and measure, improve machining efficiency and staff only need in fixed subassembly 8 place one side operation can, the security performance is higher.

When the movement is needed:

the pushing rod 72 is pulled to drive the baffle 5 to abut against the side wall of the machine body 1, hinged points of the front operating rod 551, the rear operating rod 552 and the front operating rod 721 and the rear operating rod 722 are all located on the side edge of the machine body 1, the first rotation stopping block 13 completely slides into the front operating rod 551, the second rotation stopping block 16 completely slides into the front operating rod 721, the rear operating rod 552 rotates downwards, the rear operating rod 722 rotates upwards, the blocking rod 18 enters the fixing groove 19, the blocking plate 21 abuts against the upper surface of the rear operating rod 552 and abuts against the limiting rod 22, the rear operating rod 552 and the rear operating rod 722 are fixed on the side wall of the machine body 1, the overall size of the steel bar cutting machine is reduced, and the spatial movement limitation of the steel bar cutting machine is reduced.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (9)

1. The utility model provides a steel bar cutting machine, includes organism (1), organism (1) internal fixation has the driving piece, be provided with stationary knife (2) and removal sword (3) on organism (1) relatively, it is driven by the driving piece to remove sword (3), be provided with workstation (6), its characterized in that on organism (1) of the bottom of stationary knife (2) and removal sword (3): organism (1) one side is provided with baffle (5), baffle (5) are close to organism (1) one side seted up spacing groove (51), spacing groove (51) are located and form the spacing chamber that supplies the reinforcing bar to place between cell wall and briquetting (52) of briquetting (52) downside, it is connected with briquetting (52) to slide along the upper and lower direction in spacing groove (51), the top of briquetting (52) is fixed with pull rod (54), the other end of pull rod (54) articulates there is control lever (55).

2. A bar cutter according to claim 1, wherein: organism (1) is provided with and is used for driving the subassembly (7) that slides that baffle (5) removed, subassembly (7) that slides include along vertical removal sword (3) moving direction set up in workstation (6) and organism (1) between two fifth spout (71) that are parallel to each other, slide and connect catch bar (72) in fifth spout (71), and the one end and the baffle (5) of catch bar (72) are fixed.

3. A bar cutter according to claim 2, wherein: a supporting plate (9) is fixed on the machine body (1) above the fixed knife (2) and the movable knife (3), a tape measure (10) is fixed on the upper surface of the supporting plate (9), and a tape hook of the tape measure (10) is fixed on the baffle (5) through a screw.

4. A bar cutter according to claim 3, wherein: be provided with on organism (1) and carry out fixed subassembly (8) fixed to subassembly (7) that slides, fixed subassembly (8) including be fixed in U type groove (81) of fifth spout (71) one end, wear to locate bolt (83) of U type groove (81) lateral wall and be located bolt (83) and wear to establish rubber slab (82) of one side of U type groove (81), the opening in U type groove (81) makes progress, catch bar (72) pass U type groove (81) and slide with fifth spout (71) and be connected, bolt (83) and U type groove (81) lateral wall threaded connection.

5. A bar cutter according to claim 2, wherein: the operating rod (55) comprises an operating front rod (551) and an operating rear rod (552), two ends of the operating front rod (551) are respectively hinged to the pull rod (54) and the operating rear rod (552), two side walls of the operating front rod (551) are provided with first sliding grooves (11), two side walls of the operating rear rod (552) are provided with second sliding grooves (12), the first sliding grooves (11) and the second sliding grooves (12) are connected with first rotation stopping blocks (13) in a sliding mode, and the length of each first rotation stopping block (13) is at least smaller than that of any one of the two sliding grooves of the first sliding grooves (11) or the second sliding grooves (12).

6. A bar cutter according to claim 5, wherein: the utility model discloses a length of four spout stopper, including catch bar (72), catch bar (721) and promotion back pole (722), the one end of pushing bar (721) is fixed with baffle (5) before promoting, it is articulated with promotion back pole (722) to promote the other end of preceding pole (721), third spout (14) have been seted up to the both sides lateral wall of promotion front pole (721), fourth spout (15) have been seted up to the both sides lateral wall of promotion back pole (722), third spout (14) and fourth spout (15) slide and are connected with the second and end and revolve piece (16), the length of second end and revolve piece (16) is less than the length of any one in two spouts of third spout (14) or fourth spout (15).

7. A bar cutter according to claim 6, wherein: operating back pole (552) and having seted up mounting groove (17) along length direction both sides lateral wall, the embedded barrier rod (18) that is equipped with in mounting groove (17), barrier rod (18) one end articulates in mounting groove (17) inside wall, fixed slot (19) that supply barrier rod (18) scarf joint are seted up in promotion back pole (722), barrier rod (18) can be put into in fixed slot (19).

8. A bar cutter according to claim 2, wherein: the side wall of the machine body (1) is fixed with a rotating shaft (20), the rotating shaft (20) is rotatably connected with a blocking plate (21), the side wall of the machine body (1) is fixed with a limiting rod (22), and the limiting rod (22) limits the rotation of the blocking plate (21).

9. A bar cutter according to claim 3, wherein: a supporting rod (56) is fixed on the supporting plate (9), a U-shaped seat (57) is fixed at the other end of the supporting rod (56), and the side wall of the operating rod (55) is arranged in the U-shaped seat (57).

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