CN114904986A

CN114904986A - Bar cutting equipment

Info

Publication number: CN114904986A
Application number: CN202210365970.6A
Authority: CN
Inventors: 王文明; 王旭斌
Original assignee: Ningbo Fenghua Fengming Machinery Co ltd
Current assignee: Ningbo Fenghua Fengming Machinery Co ltd
Priority date: 2022-04-08
Filing date: 2022-04-08
Publication date: 2022-08-16
Anticipated expiration: 2042-04-08
Also published as: CN114904986B

Abstract

The invention discloses bar cutting equipment, which comprises a base, wherein a feeding mechanism, a straightening mechanism and a cutting mechanism are arranged on the base, the cutting mechanism comprises a cutting assembly, a rail and a leaning grid structure, the rail is arranged along the feeding direction of bars, a return spring is sleeved on the rail, the cutting assembly has the tendency of moving towards the direction opposite to the feeding direction of the bars under the action of the return spring, the cutting assembly comprises a cutting frame and a cutter arranged on the cutting frame, the leaning grid structure comprises a mounting rod and a sensor, the mounting rod is connected with the cutting frame, a hanging arm is arranged on the mounting rod, a top rod corresponding to the position of the bars is arranged at one end, close to the bars, of the hanging arm, an elastic part is arranged in the hanging arm, the top rod has the tendency of moving towards the direction close to one side of the bars under the action of the elastic part, a sensor for detecting the position of the top rod is arranged at one end, far away from the bars, through the arrangement, the time of bar stopping in the cutting process is reduced, and the cutting efficiency of the cutting equipment is further improved.

Description

Bar cutting equipment

Technical Field

The invention relates to the technical field of cutting equipment, in particular to bar cutting equipment.

Background

In the field of machining, a bar shearing technology is often used, namely, a cutting device is used for shearing a long bar wound into a cylinder into a section of short bar, the existing cutting machine comprises a feeding mechanism, a straightening mechanism and a cutting mechanism which are sequentially arranged, when the cutting machine works, the long bar is intermittently conveyed to a station where the straightening mechanism is located under the action of the feeding mechanism, specifically, the feeding mechanism stops for a period of time after driving the long bar to advance for a set distance and then drives the long bar to continue to advance for the set distance, the straightening mechanism straightens the bar when the long bar advances to the station where the straightening mechanism is located, and the straightened bar enters the station where the cutting mechanism is located for cutting.

The existing cutting equipment has the following defects:

1. the cutting mechanism of the existing cutting equipment comprises the following components in the cutting process: the sensor detects that the bar stock is conveyed to a set position and then cuts the bar stock through the cutter of the cutting mechanism, the bar stock is suspended to run while cutting, after the cutting is completed, the cutter of the cutting mechanism resets, meanwhile, the bar stock continues to run under the driving of the feeding mechanism until the sensor detects the bar stock again, at the moment, the bar stock stops running again and is cut through the cutting mechanism, the cutting process needs to intermittently convey the bar stock (the bar stock is suspended to run after the bar stock is conveyed to the set position and then runs again after the cutting mechanism completes the cutting action), and the cutting mechanism causes the cutting efficiency to be lower;

2. the existing cutting mechanism can only cut the bar into a fixed length, if the bar is cut into finished products with different sizes (lengths), the positioning plate for fixed-length limiting of the bar needs to be replaced, and the operation is inconvenient;

3. the long-strip-shaped bar stock is conveyed to a station where the straightening mechanism is located under the action of the feeding mechanism, and the bar stock needs to be straightened before being cut, so that the position on the feeding mechanism, which is used for supporting the bar stock, and the position on the straightening mechanism, which is used for supporting the bar stock, are located on the same horizontal plane, and the height adjustment of the existing feeding mechanism is complex.

Disclosure of Invention

The invention aims to provide bar cutting equipment, which reduces the time for stopping a bar in the cutting process and further improves the cutting efficiency of the cutting equipment.

The technical purpose of the invention is realized by the following technical scheme: a bar cutting device comprises a base, wherein a feeding mechanism, a straightening mechanism and a cutting mechanism are arranged on the base, the feeding mechanism is used for providing driving force for bars to move along the feeding direction, the straightening mechanism is used for straightening the bars, the cutting mechanism comprises a cutting assembly, a rail and a fence structure, the rail is arranged along the feeding direction of the bars, a reset spring is sleeved on the periphery of the rail, the cutting assembly has a trend of moving towards the opposite direction of the feeding direction of the bars under the action of the reset spring, the cutting assembly comprises a cutting frame arranged on the rail in a sliding mode and a cutter arranged on the cutting frame, the fence structure comprises an installation rod and a sensor, the installation rod is connected to one side of the cutting frame corresponding to a bar discharge port, a hanging arm is arranged on the installation rod, one end, adjacent to the bars, of the hanging arm is provided with an ejector rod corresponding to the position of the bars, be equipped with the elastic component in the string arm, the ejector pin has the trend of the direction motion of being close to bar one side under the elastic component effect, and the one end that the bar was kept away from to the string arm is equipped with the sensor that detects the ejector pin position, and the bar can drive the ejector pin and move towards sensor one side when leaning on the ejector pin, and then drives and cuts off the frame and move along bar feeding direction on the track.

Further, straightening mechanism is equipped with two sets ofly and the interval sets up, feeding mechanism is equipped with three sets ofly and sets up with straightening mechanism is crisscross.

Furthermore, one of them straightening mechanism horizontal setting, the vertical setting of another straightening mechanism, straightening mechanism includes the fixed plate and sets up last alignment wheel and the lower alignment wheel on the fixed plate along bar feeding direction in turn, the periphery of going up alignment wheel and lower alignment wheel be equipped with bar assorted annular.

Further, feeding mechanism includes the mounting bracket, be equipped with the action wheel on the mounting bracket and set up in the action wheel upper end and with the action wheel reverse synchronous rotation from the driving wheel, the action wheel with from being formed with the material passageway of walking that supplies the bar to pass between the driving wheel, be equipped with drive action wheel pivoted driver on the mounting bracket, feeding mechanism still includes base and first adjusting screw, be equipped with the lower part male guide way that supplies the mounting bracket in the base, the mounting bracket can be along the vertical slip of guide way, the both ends of mounting bracket are connected with the regulating block, the outside position that the regulating block is located the guide way is equipped with the screw hole with first adjusting screw assorted, first adjusting screw in the screw hole of regulating block, adjust the distance that stretches out in the guide way through adjusting the distance that first adjusting screw stretches out in the mounting bracket downwards.

Further, be equipped with the installation cavity of vertical setting in the mounting bracket, be equipped with top shoe and lower slider in the installation cavity, be equipped with the drive top shoe on the mounting bracket for the vertical gliding regulation structure of slider down, the action wheel rotates to be connected in slider down, rotates from the driving wheel to be connected in the top shoe, the action wheel with pass through the drive mechanism transmission from the driving wheel and connect.

Further, adjust the structure and include cylinder, connecting block and connecting rod, the cylinder is fixed to be set up in the upper end of mounting bracket, and connecting block fixed connection is in the output of cylinder, and the both ends of connecting block are equipped with the connecting rod, and the lower extreme of connecting rod is connected in the top shoe, and the upper end of connecting rod is equipped with the spacing portion of the spacing complex with the connecting block, and the periphery of connecting rod is equipped with the compression spring of butt between top shoe and connecting block, and the connecting block can be along the vertical slip of connecting rod.

Further, be equipped with the slide bar that sets up along bar feeding direction on the installation pole and slide and set up the fence seat that leans on the slide bar, should lean on the fence seat to be fixed in the installation pole through first locating component, hang arm fixed connection in leaning on the fence seat, be equipped with on the installation pole and follow its length direction gliding fixed block, the fixed block passes through the second locating component to be fixed on the installation pole and is located the one side of leaning on the fence seat for cutting off the frame, and threaded connection has the second adjusting screw on the fixed block, the inner butt of second adjusting screw is in leaning on the fence seat.

Furthermore, a through groove for the moving cutter block to pass through is formed in the position, corresponding to the moving cutter block, of the lower end of the cutting frame, a fixed cylinder is arranged in the position, corresponding to the through groove, of the cutting frame, an elastic reset piece is arranged in the fixed cylinder, the lower end of the elastic reset piece acts on the inner end of the fixed cylinder, and the upper end of the elastic reset piece acts on the moving cutter block.

Furthermore, a supporting block for supporting the elastic reset piece is arranged in the fixed cylinder, the lower end of the fixed cylinder is in threaded connection with a third adjusting screw, and the upper end of the third adjusting screw is used for supporting the supporting block.

Further, the cutter includes the stationary knife piece, moves sword piece and drive assembly, move the sword piece laminating in stationary knife piece and form feedstock channel with the cooperation of stationary knife piece, the bar passes through feedstock channel and moves towards ejection of compact direction, move sword piece vertical motion under the drive assembly effect in order to cut the bar.

Furthermore, core blocks are respectively arranged in the movable cutter block and the fixed cutter block, and the two core blocks are matched to form a feeding channel.

Furthermore, a sliding cavity in sliding fit with the ejector rod and a limiting structure for limiting the sliding stroke of the ejector rod are arranged in the hanging arm.

In conclusion, the invention has the following beneficial effects:

1. the cutting mechanism is in the working process, the bar continuously runs, and when the bar touches the ejector rod

The push rod is driven to move towards one side of the sensor, the cutting frame is driven to move for a certain distance along the feeding direction of the bar on the rail, the end distance is equal to the sliding distance of the push rod in the sliding cavity, when the push rod is detected by the sensor, the bar is cut by the cutter, and the fixed cutter block and the push rod are fixed in length when extending into the inner end of the hanging arm, so that the bar can be cut into a finished product with fixed length;

2. the straightening mechanism and the feeding mechanism are arranged in a staggered mode, so that on one hand, driving force can be better provided for the bar, on the other hand, the bar can be limited, and the bar can be conveyed to a station where the cutting mechanism is located stably and smoothly;

3. the distance that the mounting frame stretches out of the guide groove is adjusted by adjusting the distance that the first adjusting screw rod stretches out of the adjusting block downwards, so that the height of the feeding channel is adjusted, the adjustment is convenient, the height adjustment of the feeding channel can be realized only by screwing threads relative to the adjusting block, and the heights of the feeding channel of the feeding mechanism and the feeding channel of the straightening mechanism are consistent;

4. hang the arm and for cutting off the adjustable setting of distance of frame, and then can realize cutting the bar finished product of different length, and adjust comparatively conveniently, only need twist first locating component soon and make and lean on the bars seat and can slide for the installation pole, twist the second adjusting screw again and make it promote and lean on the bars seat to slide, second adjusting screw adjusts the completion back, twists first locating component again at last so that lean on the bars seat to be fixed in the installation pole.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the cutting mechanism of the present invention from a first perspective.

Fig. 3 is a schematic view of a second perspective of the cutting mechanism of the present invention.

Fig. 4 is a schematic view of a third perspective of the cutting mechanism of the present invention.

Fig. 5 is an enlarged view of the invention at a.

Fig. 6 is a first view structural diagram of the feeding mechanism of the present invention.

Fig. 7 is a schematic view of a second perspective of the feed mechanism of the present invention.

Fig. 8 is a schematic view of a third perspective of the feed mechanism of the present invention.

Fig. 9 is a longitudinal sectional view of the present invention.

Fig. 10 is a transverse cross-sectional view of the present invention.

Fig. 11 is a schematic structural view of the straightening structure of the present invention.

In the figure: 1. a base; 2. a feeding mechanism; 21. a mounting frame; 211. a mounting cavity; 212. a regulating block; 22. an upper slide block; 221. a driven wheel; 222. a second rotating shaft; 23. a lower slider; 231. a driving wheel; 232. a first rotating shaft; 24. a base; 241. a guide groove; 25. a first adjusting screw; 26. an adjustment structure; 261. a cylinder; 262. connecting blocks; 263. a connecting rod; 264. a limiting part; 265. a compression spring; 27. a transmission mechanism; 3. a straightening mechanism; 31. a fixing plate; 32. an upper straightening wheel; 33. downward regulating a straight wheel; 34. a ring groove; 4. a cutting mechanism; 41. a cutting assembly; 411. a cutting frame; 4111. a through groove; 4112. a hydraulic shock absorber; 412. a cutter; 4121. a cutter fixing block; 4122. a movable cutter block; 4123. a drive assembly; 42. a track; 421. a return spring; 43. a fence structure; 431. mounting a rod; 4311. a slide bar; 4312. a fixed block; 4313. a second positioning assembly; 4314. a second adjusting screw; 432. a fence base; 4321. a first positioning assembly; 433. hanging the arm; 4331. a top rod; 4332. an elastic member; 4333. a slide chamber; 4334. a limiting structure; 434. a sensor; 44. a fixed cylinder; 441. an elastic reset member; 442. a support block; 443. a third adjusting screw; 45. a core block; 451. a feed channel; 46. a supporting seat; 5. and (4) a bar stock.

Detailed Description

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

As shown in fig. 1 to 11, a bar cutting device includes a base 1, a feeding mechanism 2, a straightening mechanism 3 and a cutting mechanism 4 are disposed on the base 1, the feeding mechanism 2 is used for providing a driving force for the bar 5 to move along a feeding direction, the straightening mechanism 3 is used for straightening the bar 5, the cutting mechanism 4 is used for cutting the bar 5 into a finished product with a fixed length, in the invention, the straightening mechanism 3 is disposed with two sets and spaced, specifically, one straightening mechanism 3 is disposed horizontally, the other straightening mechanism 3 is disposed vertically, the straightening mechanism 3 includes a fixing plate 31 and upper straightening wheels 32 and lower straightening wheels 33 alternately disposed on the fixing plate 31 along the feeding direction of the bar 5, annular grooves 34 matched with the bar 5 are disposed on peripheries of the upper straightening wheels 32 and the lower straightening wheels 33, the annular grooves 34 of the upper straightening wheels 32 and the annular grooves 34 of the lower straightening wheels 33 cooperate to form a material conveying channel of the straightening mechanism 3, feeding mechanism 2 is equipped with three groups and sets up with alignment mechanism 3 is crisscross, with alignment mechanism 3 and the crisscross setting of feeding mechanism 2, can provide drive power for bar 5 better on the one hand, on the other hand can play limiting displacement to bar 5, makes it can steadily and smoothly carry to the station of cutting mechanism 4 place.

The feeding mechanism 2 comprises an installation frame 21, a driving wheel 231 and a driven wheel 221 which is arranged at the upper end of the driving wheel 231 and rotates reversely and synchronously with the driving wheel 231 are arranged on the installation frame 21, a feeding channel for the bar 5 to pass through is formed between the driving wheel 231 and the driven wheel 221, a driver (not shown in the invention) for driving the driving wheel 231 to rotate is arranged on the mounting frame 21, the feeding mechanism 2 further comprises a base 24 and a first adjusting screw 25, a guide groove 241 for inserting the lower part of the mounting frame 21 is arranged in the base 24, the mounting frame 21 can vertically slide along the guide groove 241, adjusting blocks 212 are connected to two ends of the mounting frame 21, threaded holes matched with the first adjusting screw 25 are arranged at the positions, located on the outer side of the guide groove 241, of the adjusting blocks 212, the first adjusting screw 25 is screwed into the threaded hole of the adjusting block 212, the distance that the mounting frame 21 protrudes from the guide groove 241 is adjusted by adjusting the distance that the first adjustment screw 25 protrudes downward from the adjustment block 212.

The distance that the mounting frame 21 extends out of the guide groove 241 is adjusted by adjusting the distance that the first adjusting screw 25 extends out of the adjusting block 212 downwards, so that the height of the feeding channel is adjusted, the adjustment is convenient, the height adjustment of the feeding channel can be realized only by screwing threads relative to the adjusting block 212, and the feeding channel of the feeding mechanism 2 is consistent with the feeding channel of the straightening mechanism 3.

Be equipped with the installation cavity 211 of vertical setting in the mounting bracket 21, be equipped with top slide 22 and lower slider 23 in the installation cavity 211, be equipped with on the mounting bracket 21 and drive top slide 22 for the vertical gliding regulation structure 26 of lower slider 23, the action wheel 231 rotates to be connected in lower slider 23, follows the rotation of driving wheel 221 and connects in top slide 22, action wheel 231 and follow driving wheel 221 pass through drive mechanism 27 transmission and connect.

The driving wheel 231 is rotatably connected to the lower slider 23 through a first rotating shaft 232, the driven wheel 221 is rotatably connected to the upper slider 22 through a second rotating shaft 222, the transmission mechanism 27 includes a driven tooth connected to the first rotating shaft 232 and a driving tooth connected to the second rotating shaft 222, the driving tooth and the driven tooth are engaged, specifically, the driving tooth is disposed on the other side of the lower slider 23 relative to the driving wheel, the driven tooth is disposed on the other side of the upper slider 22 relative to the driven wheel, and the second rotating shaft 222 is provided with a transmission tooth in transmission connection with a driver, and the transmission tooth is driven by the driver.

The adjusting structure 26 comprises a cylinder 261, a connecting block 262 and a connecting rod 263, the cylinder 261 is fixedly arranged at the upper end of the mounting frame 21, the connecting block 262 is fixedly connected to the output end of the cylinder 261, connecting rods 263 are arranged at two ends of the connecting block 262, the lower end of the connecting rod 263 is connected to the upper slider 22, a limiting portion 264 which is in limiting fit with the connecting block 262 is arranged at the upper end of the connecting rod 263, a compression spring 265 which is abutted between the upper slider 22 and the connecting block 262 is arranged at the periphery of the connecting rod 263, the connecting block 262 can vertically slide along the connecting rod 263, through the arrangement, when the cylinder 261 drives the connecting block 262 to vertically move, the upper slider 22 vertically slides relative to the lower slider 2313 under the elastic force action of the compression spring 265, and meanwhile, the compression spring 265 can play a certain buffering role, so that the bent section of the long bar 5 can jack up the driven wheel 221 to continue to advance when passing through the material feeding channel, the phenomenon of locking is avoided.

Cutting mechanism 4 includes cutting assembly 41, track 42 and leans on bars structure 43, track 42 sets up along bar 5's direction of feed, and track 42 periphery cover is equipped with reset spring 421, and cutting assembly 41 has the trend towards bar 5 direction of feed opposite direction motion under the effect of reset spring 421, and this track 42 passes through supporting seat 46 and installs on base 1, cut off the both ends of frame 411 and install a plurality of oil pressure buffers 4112, when reset spring 421 drive cuts off frame 411 and resets, act on supporting seat 21 through oil pressure buffer 4112 in order to play the damping effect.

The cutting assembly 41 comprises a cutting frame 411 arranged on the rail 42 in a sliding mode and a cutter 412 arranged on the cutting frame 411, the leaning grid structure 43 comprises an installation rod 431 and a sensor 434, the installation rod 431 is connected to one side of the cutting frame 411 corresponding to a discharge hole of a bar 5, a hanging arm 433 is arranged on the installation rod 431, one end, close to the bar 5, of the hanging arm 433 is provided with a push rod 4331 corresponding to the position of the bar 5, an elastic part 4332 is arranged in the hanging arm 433, the push rod 4331 has a trend of moving towards the direction close to one side of the bar 5 under the action of the elastic part 4332, one end, far away from the bar 5, of the hanging arm 433 is provided with a sensor 434 for detecting the position of the push rod 4331, when the bar 5 abuts against the push rod 4331, the push rod 4331 is driven to move towards one side of the sensor 434, and the cutting frame 411 is driven to move on the rail 42 along the feeding direction of the bar 5.

In the working process of the cutting mechanism 4, the bar 5 is continuously operated, when the bar 5 touches the top rod 4331, the top rod 4331 is driven to move towards the sensor 434, thereby driving the cutting frame 411 to move on the track 42 for a certain distance along the feeding direction of the bar 5, and the end distance is equal to the distance of the push rod 4331 sliding in the sliding cavity 4333, when sensor 434 detects ram 4331, cutter 412 cuts bar 5, because the distance between the fixed cutter block 4121 and the push rod 4331 is fixed when the fixed cutter block and the push rod 4331 extend into the inner end of the hanging arm 433, so that the bar 5 can be cut into a finished product with a fixed length, after the cutting is finished, the push rod 4331 resets under the action of the elastic part 4332, the movable knife block 4122 resets under the action of the elastic resetting part 441, the cutting frame 411 resets under the action of the resetting spring 421, this structural design can reduce the time that bar 5 stopped moving among the cutting process, and then has improved cutting mechanism 4's cutting efficiency.

The mounting rod 431 is provided with a sliding rod 4311 arranged along the feeding direction of the bar 5 and a fence base 432 slidably arranged on the sliding rod 4311, the fence base 432 is fixed on the mounting rod 431 through a first positioning component 4321, the hanging arm 433 is fixedly connected to the fence base 432, the mounting rod 431 is provided with a fixed block 4312 capable of sliding along the length direction of the mounting rod, the fixed block 4312 is fixed on the mounting rod 431 through a second positioning component 4313 and is positioned at one side of the fence base 432 relative to the cutting frame 411, the fixed block 4312 is in threaded connection with a second adjusting screw 4314, the inner end of the second adjusting screw 4314 is abutted against the fence base 432, the distance between the hanging arm 433 and the cutting frame 411 is adjustable, so that the bar 5 can be cut into finished products with different lengths, the adjustment is convenient, only the first positioning component 4321 needs to be screwed to enable the fence base 432 to slide relative to the mounting rod 431, and then the second adjusting screw 4314 is screwed to push the fence base 432 to slide, after the second adjusting screw 4314 is adjusted, the first positioning assembly 4321 is finally screwed to fix the fence seat 432 to the mounting rod 431.

The cutter 412 comprises a fixed cutter block 4121, a movable cutter block 4122 and a driving assembly 4123, wherein the movable cutter block 4122 is attached to the fixed cutter block 4121 and matched with the fixed cutter block 4121 to form a feeding channel 451, the bar 5 runs towards the discharging direction through the feeding channel 451, the movable cutter block 4122 vertically moves under the action of the driving assembly 4123 to cut the bar 5, specifically, the movable cutter block 4122 is attached to the fixed cutter block 4121 and matched with the fixed cutter block 4121 to form a feeding channel, the bar 5 runs towards the discharging direction through the feeding channel, and the movable cutter block 4122 vertically moves under the action of the driving assembly 4123 to cut the bar 5.

A through groove 4111 for the moving blade 4122 to pass through is formed in the position, corresponding to the moving blade 4122, of the lower end of the cutting frame 411, a fixed cylinder 44 is arranged in the position, corresponding to the through groove 4111, of the cutting frame 411, an elastic resetting member 441 is arranged in the fixed cylinder 44, the lower end of the elastic resetting member 441 acts on the inner end of the fixed cylinder 44, the upper end of the elastic resetting member 441 acts on the moving blade 4122, in an initial state, a space is reserved between the output end of the driving assembly 4123 and the moving blade 4122, the moving blade 4122122 is pressed down to enable the moving blade 4122 to vertically cut the bar 5 when the driving assembly 4123 acts, furthermore, a supporting block 442 for supporting the elastic resetting member 441 is arranged in the fixed cylinder 44, a third adjusting screw 443 is connected to the lower end of the fixed cylinder 44 in a threaded manner, and the upper end of the third adjusting screw is used for supporting the supporting block 442.

The movable cutter block 4122 and the fixed cutter block 4121 are internally provided with the core blocks 45 respectively, the two core blocks 45 are matched to form the feeding channel 451, and through the arrangement, when the movable cutter block 4122 and the fixed cutter block 4121 are damaged after working for a long time, only the core blocks 45 need to be replaced, so that the use cost of materials is greatly reduced.

The hanging arm 433 is internally provided with a sliding cavity 4333 in sliding fit with the ejector rod 4331 and a limiting structure 4334 for limiting the sliding stroke of the ejector rod 4331, specifically, the hanging arm 433 is internally provided with a sliding cavity 4333 in sliding fit with the ejector rod 4331 and a limiting structure 4334 for limiting the sliding stroke of the ejector rod 4331, the ejector rod 4331 is radially provided with a flange, and the limiting structure 4334 is matched with the flange to control the stroke of the ejector rod 4331.

The above description is only a preferred embodiment of the present invention, and all equivalent changes or modifications of the structure, characteristics and principles described in the present invention are included in the scope of the present invention.

Claims

1. A bar cutting equipment which characterized in that: comprises a base (1), a feeding mechanism (2), a straightening mechanism (3) and a cutting mechanism (4) are arranged on the base (1), the feeding mechanism (2) is used for providing a driving force for the bar (5) to move along the feeding direction, the straightening mechanism (3) is used for straightening the bar (5), the cutting mechanism (4) comprises a cutting component (41), a rail (42) and a fence structure (43), the rail (42) is arranged along the feeding direction of the bar (5), a return spring (421) is sleeved on the periphery of the rail (42), the cutting component (41) has a trend of moving towards the opposite direction of the feeding direction of the bar (5) under the action of the return spring (421), the cutting component (41) comprises a cutting frame (411) arranged on the rail (42) in a sliding manner and a cutter (412) arranged on the cutting frame (411), the fence structure (43) comprises a mounting rod (431) and a sensor (434), installation pole (431) are connected in the one side that cuts off frame (411) and correspond bar (5) discharge gate, are provided with on installation pole (431) and hang arm (433), the one end that hangs arm (433) neighbouring bar (5) is equipped with ejector pin (4331) corresponding with the position of bar (5), be equipped with elastic component (4332) in hanging arm (433), ejector pin (4331) have the trend towards the direction motion that is close to bar (5) one side under elastic component (4332) effect, the one end that hangs arm (433) and keeps away from bar (5) is equipped with sensor (434) that detect ejector pin (4331) position, bar (5) can drive ejector pin (4331) towards sensor (434) one side motion when leaning on ejector pin (4331), and then drive cut off frame (411) and move along bar (5) direction of feed on track (42).

2. A bar cutting apparatus according to claim 1, characterized in that: the straightening mechanism (3) is provided with two groups and arranged at intervals, and the feeding mechanism (2) is provided with three groups and arranged in a staggered mode with the straightening mechanism (3).

3. A bar cutting apparatus according to claim 2, characterized in that: one of them straightening mechanism (3) horizontal setting, another straightening mechanism (3) vertical setting, straightening mechanism (3) include fixed plate (31) and set up last straightening wheel (32) and lower straightening wheel (33) on fixed plate (31) in turn along bar (5) direction of feed, the periphery of going up straightening wheel (32) and lower straightening wheel (33) is equipped with bar (5) assorted annular (34).

4. A bar cutting apparatus according to claim 1, characterized in that: the feeding mechanism (2) comprises a mounting frame (21), a driving wheel (231) and a driven wheel (221) which is arranged at the upper end of the driving wheel (231) and rotates in a reverse synchronous mode with the driving wheel (231) are arranged on the mounting frame (21), a feeding channel for the bar stock (5) to pass through is formed between the driving wheel (231) and the driven wheel (221), a driver for driving the driving wheel (231) to rotate is arranged on the mounting frame (21), the feeding mechanism (2) further comprises a base (24) and a first adjusting screw (25), a guide groove (241) for inserting the lower portion of the mounting frame (21) is formed in the base (24), the mounting frame (21) can vertically slide along the guide groove (241), adjusting blocks (212) are connected to two ends of the mounting frame (21), a threaded hole matched with the first adjusting screw (25) is formed in the outer side of the adjusting block (212) located in the guide groove (241), the first adjusting screw rod (25) is screwed into the threaded hole of the adjusting block (212), and the distance of the mounting frame (21) extending out of the guide groove (241) is adjusted by adjusting the distance of the first adjusting screw rod (25) extending out of the adjusting block (212) downwards.

5. A bar cutting apparatus according to claim 4, characterized in that: be equipped with installation cavity (211) of vertical setting in mounting bracket (21), be equipped with slider (22) and lower slider (23) in installation cavity (211), be equipped with drive slider (22) on mounting bracket (21) and for slider (23) vertical gliding regulation structure (26) down, action wheel (231) rotate to be connected in lower slider (23), rotate from driving wheel (221) to be connected in slider (22), action wheel (231) and follow driving wheel (221) pass through drive mechanism (27) transmission and connect.

6. A bar cutting apparatus according to claim 5, characterized in that: adjust structure (26) including cylinder (261), connecting block (262) and connecting rod (263), cylinder (261) is fixed to be set up in the upper end of mounting bracket (21), connecting block (262) fixed connection is in the output of cylinder (261), the both ends of connecting block (262) are equipped with connecting rod (263), the lower extreme of connecting rod (263) is connected in slider (22), the upper end of connecting rod (263) be equipped with spacing complex spacing portion (264) of connecting block (262), the periphery of connecting rod (263) is equipped with compression spring (265) of butt between slider (22) and connecting block (262), connecting block (262) can be along the vertical slip of connecting rod (263).

7. A bar cutting apparatus according to claim 1, characterized in that: the mounting rod (431) is provided with a sliding rod (4311) arranged along the feeding direction of a bar material (5) and a fence base (432) arranged on the sliding rod (4311) in a sliding manner, the fence base (432) is fixed on the mounting rod (431) through a first positioning component (4321), a hanging arm (433) is fixedly connected to the fence base (432), the mounting rod (431) is provided with a fixed block (4312) capable of sliding along the length direction of the mounting rod, the fixed block (4312) is fixed on the mounting rod (431) through a second positioning component (4313) and is positioned on one side of the fence base (432) relative to a cutting frame (411), the fixed block (4312) is connected with a second adjusting screw (4314) in a threaded manner, and the inner end of the second adjusting screw (4314) abuts against the fence base (432).

8. A bar cutting apparatus according to claim 7, wherein: the cutter (412) comprises a fixed cutter block (4121), a movable cutter block (4122) and a driving assembly (4123), the movable cutter block (4122) is attached to the fixed cutter block (4121) and matched with the fixed cutter block (4121) to form a feeding channel (451), the bar (5) runs towards the discharging direction through the feeding channel (451), and the movable cutter block (4122) vertically moves under the action of the driving assembly (4123) to cut the bar (5).

9. A bar cutting apparatus according to claim 8, wherein: the position that cuts off frame (411) lower extreme and correspond to moving sword piece (4122) is equipped with logical groove (4111) that the confession sword piece (4122) passed, cuts off the position that frame (411) corresponds logical groove (4111) and is equipped with fixed cylinder (44), is equipped with elasticity in the fixed cylinder (44) and resets piece (441), the lower extreme that elasticity resets piece (441) acts on the inner of fixed cylinder (44), and the upper end that elasticity resets piece (441) acts on moves sword piece (4122).

10. A bar cutting apparatus according to claim 9, wherein: a supporting block (442) used for supporting the elastic reset piece (441) is arranged in the fixed cylinder (44), a third adjusting screw rod (443) is connected to the lower end of the fixed cylinder (44) in a threaded manner, and the upper end of the third adjusting screw rod (443) is used for supporting the supporting block (442).

11. A bar cutting apparatus according to claim 10, wherein: the movable cutter block (4122) and the fixed cutter block (4121) are respectively provided with a core block (45), and the two core blocks (45) are matched to form a feeding channel (451).

12. A bar cutting apparatus according to claim 1, characterized in that: the hanging arm (433) is internally provided with a sliding cavity (4333) which is in sliding fit with the ejector rod (4331) and a limiting structure (4334) which limits the sliding stroke of the ejector rod (4331).