CN111515560A

CN111515560A - Feeding mechanism of steel wire laser cutting equipment

Info

Publication number: CN111515560A
Application number: CN202010435543.1A
Authority: CN
Inventors: 林礼区; 卢成绩; 温文文
Original assignee: Wenzhou University
Current assignee: Wenzhou University
Priority date: 2020-05-21
Filing date: 2020-05-21
Publication date: 2020-08-11

Abstract

The invention discloses a feeding mechanism of steel wire laser cutting equipment, which comprises a rack, a support, a motor mechanism and a guide assembly, wherein a support plate is arranged on the rack; the motor mechanism comprises a first driving motor, a first transmission roller, a second driving motor and a second transmission roller, a motor shaft of the first driving motor is in linkage with the first transmission roller, the second driving motor is connected with the second transmission roller, an arc-shaped hole which is matched with the second transmission roller and communicated with the upper space and the lower space of the support plate is arranged on the support plate, and a transmission gap for a steel wire to pass through is arranged between the first transmission roller and the second transmission roller; the guide assembly comprises a guide plate detachably mounted on the support, a plurality of guide holes for the steel wire to pass through are formed in the guide plate, and the first transmission roller and the second transmission roller drive the steel wire to move along the extension direction of the guide holes. The automatic feeding device can realize automatic feeding when the steel wire is cut, not only can improve the processing speed, but also can ensure the life safety of workers.

Description

Feeding mechanism of steel wire laser cutting equipment

Technical Field

The invention relates to the field of laser cutting equipment, in particular to a feeding mechanism of steel wire laser cutting equipment.

Background

Laser cutting equipment, it can produce the laser beam, when shining the work piece surface that needs processed with the laser beam, can release energy for the part that the work piece was shone melts and evaporates, and then reaches cutting and glyptic purpose, has the precision height, and the cutting is quick, does not confine to the restriction of cutting pattern, and automatic composing save material, the incision is level and smooth, characteristics such as processing cost low, because the advantage that laser cutting equipment possessed, the staff often utilizes laser cutting equipment to cut the steel wire of different specifications. Usually adopt artifical fixed wire rope to carry out laser cutting to it, cut and impel wire rope according to the processing requirement after one section and carry out the cutting of next section, this kind of operation mode is fast though laser cutting speed, but because the reason of steel wire adoption artifical feeding, not only the process velocity is low, and efficiency is slow, and staff's production safety can not obtain the guarantee moreover. Therefore, a feeding mechanism of the steel wire laser cutting device is urgently needed to solve the problems.

Disclosure of Invention

The invention aims to provide a feeding mechanism of steel wire laser cutting equipment. The automatic feeding device can realize automatic feeding when the steel wire is cut, not only can obviously improve the processing speed and the processing efficiency, but also can ensure the life safety of workers.

The technical scheme of the invention is as follows: a feeding mechanism of steel wire laser cutting equipment comprises a machine frame, wherein a support plate is arranged on the machine frame, and a support, a motor mechanism for driving a steel wire to translate and a guide assembly for guiding the steel wire to move are erected on the support plate; the motor mechanism comprises a first driving motor and a second driving motor which are arranged on two sides of the bracket; the output end of the first driving motor is connected with a first transmission roller; the output end of the second driving motor is connected with a second driving roller positioned below the supporting plate; the supporting plate is provided with an arc-shaped hole which is matched with the second driving roller and is communicated with the upper space and the lower space of the supporting plate, and a driving gap for a steel wire to pass through is arranged between the first driving roller and the second driving roller; the guide assembly comprises a guide plate detachably mounted on the support, a plurality of guide holes for the steel wires to pass through are formed in the guide plate, and the first transmission roller and the second transmission roller drive the steel wires to move along the extension direction of the guide holes; the supporting plate is provided with a plurality of groups of first pre-feeding assemblies acting on corresponding steel wires, the front ends between the adjacent first pre-feeding assemblies are also provided with second pre-feeding assemblies, and the middle parts of the second pre-feeding assemblies are connected with the extension lines of the corresponding guide holes.

According to the feeding mechanism of the steel wire laser cutting equipment, the support comprises side plates on two sides, and a top plate is connected above the side plates through an L-shaped plate; sliding blocks are arranged at two ends of the first transmission roller, and sliding holes in sliding fit with the sliding blocks are formed in the side plates; the lifting assembly is arranged on the top plate and comprises an air cylinder, the telescopic end of the air cylinder penetrates through the top plate and is connected with a connecting plate, and two sides of the connecting plate are connected with the two sliding blocks respectively.

According to the feeding mechanism of the steel wire laser cutting equipment, the sliding block is provided with the limiting parts which are abutted against the two sides of the side plate.

The feeding mechanism of the steel wire laser cutting equipment comprises a feeding mechanism body, a clamping ring is arranged at the end part of the movable end of the air cylinder, a connecting assembly used for being connected with the clamping ring is arranged on the connecting plate, the connecting assembly comprises a bottom plate arranged on the connecting plate, a first screw rod is arranged on the bottom plate, two U-shaped clamping plates are connected to the first screw rod in a threaded mode, a limiting sliding groove is formed in the connecting plate, the bottom plate and the limiting sliding groove form a sliding fit, and the clamping ring is clamped between the two U-shaped clamping plates.

According to the feeding mechanism of the steel wire laser cutting equipment, the U-shaped clamping plates are fixed through the locking nuts arranged on two sides of the U-shaped clamping plates, the locking nuts are in threaded fit with the first screw rods, and the distance between the two U-shaped clamping plates is larger than the thickness of the clamping ring.

According to the feeding mechanism of the steel wire laser cutting equipment, the two sliding blocks are provided with the balance assemblies, each balance assembly comprises the second screw rod, each second screw rod penetrates through the L-shaped plate and extends into the corresponding sliding hole, each second screw rod is provided with the corresponding shaft sleeve, the upper end of each shaft sleeve is provided with the corresponding hand wheel, and the bottom end of each shaft sleeve is provided with the convex ring extending towards the periphery; the L-shaped plate is provided with a gland which is abutted against the upper surface of the convex ring; the bottom of second screw rod is equipped with presses the cover, presses to be equipped with the constant head tank in the cover, be equipped with the fixing base on the connecting plate, be equipped with the mounting groove on the fixing base, be equipped with the spring between mounting groove and the spring.

According to the feeding mechanism of the steel wire laser cutting equipment, the upper end of the second screw rod is provided with the limiting screw.

According to the feeding mechanism of the steel wire laser cutting equipment, the support is provided with the protection plate, and two ends of the protection plate are respectively arranged on the two side plates in a sliding manner; a plurality of observation holes used for observing the motion condition of the first transmission roller are formed in the protection plate.

Aforementioned feed mechanism of steel wire laser cutting equipment, first feeding subassembly and second feeding subassembly's constitution is the same in advance, all includes two and rotates two gyro wheels that set up in the backup pad through the pivot, is equipped with the feeding clearance that supplies the steel wire to pass between two gyro wheels, and the feeding clearance meets with the extension line of the guiding hole that corresponds.

Compared with the prior art, the steel wire pre-feeding device has the advantages that the first pre-feeding assembly and the second pre-feeding assembly are used for guiding the steel wires before transportation, the steel wires can not be transported any more due to the structural arrangement between the traditional adjacent guiding structures, so that the feeding quantity of the steel wires on the same area is small, and the adjacent first pre-feeding assemblies can convey one steel wire again in a mode of staggered arrangement from top to bottom, so that the output quantity can be doubled compared with that of the traditional guiding structure, and the material conveying efficiency is improved; the invention respectively drives the first transmission roller and the second transmission roller to rotate through the first driving motor and the second driving motor on the motor mechanism, the rotation directions of the first transmission roller and the second transmission roller are opposite, when a plurality of steel wires pass through the transmission gap between the first transmission roller and the second transmission roller, the steel wires are forcibly dragged to displace by the first transmission roller and the second transmission roller while being extruded by the first transmission roller and the second transmission roller, a plurality of guide holes for the steel wires to pass through are arranged on the guide plate of the guide assembly, each steel wire can accurately reach the processing position of laser cutting by displacing along the extension direction of the corresponding guide hole in the guide hole, thereby realizing the function of automatic feeding of the steel wires, not only remarkably improving the processing speed through automatic feeding and multi-station feeding, but also avoiding manual feeding of the steel wires and preventing workers from being accidentally injured by laser due to negligence, thereby ensuring the life safety of the working personnel. In addition, the top plate of the support is provided with the air cylinder, and the telescopic end of the air cylinder is connected with the sliding blocks arranged at the two ends of the first transmission roller through the connecting plate, so that the first transmission roller and the first driving motor can be driven to move up and down through the air cylinder, and the transmission gap between the first transmission roller and the second transmission roller is adjusted to adapt to steel wires of different specifications. The sliding block is provided with the limiting parts which are abutted against the two sides of the side plate, the structure can play a role in limiting the sliding block transversely, and the first driving roller is more stable in vertical displacement. According to the invention, the two sliding blocks are respectively provided with the balance assembly, namely, the shaft sleeve is driven to rotate by rotating the hand wheel on the balance assembly, the shaft sleeve drives the second screw rod to rotate and simultaneously drives the second screw rod to lift, when the second screw rod descends, the pressing sleeve at the lower end of the second screw rod extrudes the spring, the spring is compressed under force and extrudes the fixed seat, the fixed seat and the sliding blocks are simultaneously extruded under extrusion force, the swinging generated when the first transmission roller lifts and rotates can be effectively reduced by adjusting the balance assemblies at two sides, meanwhile, the influence of unbalanced stress at two ends caused by the connection of the first driving motor at one side of the first transmission roller can be eliminated, the first transmission roller is prevented from tilting, so that a plurality of steel wires can move at a constant speed, and a plurality of steel wires are cut into steel wire sections. According to the invention, the protective plate is arranged on the support to prevent sundries from being involved in the first transmission roller or the second transmission roller to influence the transmission of the steel wire, and the motion condition of the first transmission roller can be observed through the observation hole in the protective plate. The first feeding subassembly in advance of multiunit in the backup pad contacts steel wire and gyro wheel arc surface and can avoid the steel wire to produce the influence processing effect of buckling when leading it.

Drawings

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

FIG. 2 is a schematic partial view of the present invention with the single side shield removed;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is a schematic view of the engagement structure of the connecting assembly and the snap ring of the present invention;

FIG. 5 is a schematic structural view of the balancing assembly of the present invention;

FIG. 6 is a schematic structural view of a first pre-feed assembly of the present invention;

the labels in the figures are: 1. a frame; 101. a support plate; 2. a support; 201. a side plate; 202. A top plate; 203. an L-shaped plate; 204. a slide hole; 3. a motor mechanism; 301. a first drive motor; 302. a first drive roller; 303. a second drive motor; 304. a second driving roller; 305. A transmission gap; 306. an arc-shaped hole; 4. a lifting assembly; 401. a cylinder; 402. a connection plate; 4021. a limiting chute; 403. a connecting assembly; 4031. a base plate; 4032. a first screw; 4033. a U-shaped clamping plate; 4034. locking the nut; 404. a slider; 405. a snap ring; 406. A limiting part; 5. a balancing component; 501. a second screw; 502. a shaft sleeve; 503. pressing a cover; 504. a hand wheel; 505. a spring; 506. a convex ring; 507. pressing the sleeve; 508. positioning a groove; 509. A fixed seat; 510. an O-shaped mounting groove; 511. a limiting screw; 6. a guide assembly; 601. a guide plate; 602. a guide hole; 7. a first pre-feed assembly; 701. a roller; 702. a rotating shaft; 703. A feed gap; 704. a second pre-feed assembly; 8. a protection plate; 801. and (6) observing holes.

Detailed Description

The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention thereto.

Example (b): a feeding mechanism of steel wire laser cutting equipment is shown in figures 1-6 and comprises a rack 1, wherein a supporting plate 101 is arranged on the rack 1, a support 2, a motor mechanism 3 for driving a steel wire to move horizontally and a guide assembly 6 for guiding the steel wire to move are erected on the supporting plate 101; the motor mechanism 3 comprises a first driving motor 301 and a second driving motor 303 which are arranged at two sides of the bracket 2; the output end of the first driving motor 301 is connected with a first driving roller 302; the output end of the second driving motor 303 is connected with a second driving roller 304 positioned below the supporting plate 101; an arc-shaped hole 306 which is matched with the second driving roller 304 and is communicated with the upper space and the lower space of the supporting plate 101 is formed in the supporting plate 101, and a driving gap 305 for a steel wire to pass through is formed between the first driving roller 302 and the second driving roller 304; the guide assembly 6 comprises a guide plate 601 detachably mounted on the bracket 2, a plurality of guide holes 602 for the steel wires to pass through are formed in the guide plate 601, and the first driving roller 302 and the second driving roller 304 drive the steel wires to move along the extending direction of the guide holes 602; the supporting plate 101 is provided with a plurality of groups of first pre-feeding assemblies 7 acting on corresponding steel wires, a second pre-feeding assembly is further arranged at the front end between the adjacent first pre-feeding assemblies 7, and the middle of the second pre-feeding assembly 704 is connected with the extension line of the corresponding guide hole 602. The steel wires are guided before being transported through the first pre-feeding assembly 7 and the second pre-feeding assembly 704, and the steel wires cannot be transported any more due to structural arrangement between the traditional adjacent guide structures, so that the feeding quantity of the steel wires is small in the same area, and the steel wires can be transported between the adjacent first pre-feeding assemblies 7 in a mode of staggered arrangement from top to bottom, so that the output quantity of the steel wires can be doubled compared with the output quantity of the traditional guide structures, and the material transporting efficiency is improved; according to the invention, the first driving motor 301 and the second driving motor 303 on the motor mechanism 3 respectively drive the first driving roller 302 and the second driving roller 304 to rotate, the rotation directions of the first driving roller 302 and the second driving roller 304 are opposite, when a plurality of steel wires pass through the transmission gap 305 between the first driving roller 302 and the second driving roller 304, the steel wires are forced to be dragged by the first driving roller 302 and the second driving roller 304 to move while being extruded by the first driving roller 302 and the second driving roller 304, a plurality of guide holes 602 for the steel wires to pass through are arranged on the guide plate 601 of the guide assembly 6, each steel wire moves in the guide holes 602 along the extending direction of the corresponding guide hole 602 and can accurately reach the processing position of laser cutting, so that the automatic feeding function of the automatic steel wires is realized, the processing speed can be obviously improved through automatic feeding and multi-station feeding, and need not the manual work and carry out the feeding of steel wire, can prevent that the staff from being accidentally injured by laser because of carelessness to guarantee staff's life safety.

Further, as shown in fig. 2 and 3, the bracket 2 includes side plates 201 on two sides, and a top plate 202 is connected to the upper side of the side plates 201 through an L-shaped plate 203; the two ends of the first driving roller 302 are provided with sliding blocks 404, the side plate 201 is provided with a sliding hole 204 which forms sliding fit with the sliding blocks 404, the top plate 202 is provided with a lifting assembly 4, the lifting assembly 4 comprises an air cylinder 401, the movable end of the air cylinder 401 penetrates through the top plate 202 and is connected with a connecting plate 402, and two sides of the connecting plate 402 are respectively connected with the two sliding blocks 404. The first driving roller 302 and the first driving motor 301 can be driven to move up and down by the cylinder 401, and the driving gap 305 between the first driving roller 302 and the second driving roller 304 is further adjusted to adapt to steel wires with different specifications.

Further, as shown in fig. 1, the sliding block 404 is provided with a limiting portion 406 abutting against two sides of the side plate 201, and this structure can perform a transverse limiting function on the sliding block 404 and make the first driving roller 302 more stable in vertical displacement.

Further, as shown in fig. 3 and 4, a snap ring 405 is disposed at the end of the movable end of the cylinder 401, a connection assembly 403 for connecting with the snap ring 405 is disposed on the connection plate 402, the connection assembly 403 includes a bottom plate 4031 disposed on the connection plate 402, a first screw 4032 disposed on the bottom plate 4031, and two U-shaped snap plates 4033 screwed on the first screw 4032, a limit sliding slot 4021 is disposed on the connection plate 402, the bottom plate 4031 and the limit sliding slot 4021 form a sliding fit, which is beneficial for dismounting the connection assembly 403, the snap ring 405 is snapped between the two U-shaped snap plates 4033 to connect the movable end of the cylinder 401 with the connection plate 402, and the bottom plate 4031 of the connection assembly 403 is snapped into the limit sliding slot 4021 to connect the snap ring 405 and the two U-shaped snap plates 4033, so as to connect the movable end of the cylinder 401 with the connection plate 402, when the bottom plate 4031 of the connecting component 403 is pulled out, the cylinder 401 and the connecting plate 402 can be separated, and the assembly and disassembly are very convenient.

Further, as shown in fig. 4, the U-shaped clamping plate 4033 is fixed by the locking nuts 4034 arranged on both sides of the U-shaped clamping plate 4033, so that the distance between the two U-shaped clamping plates 4033 can be conveniently adjusted, the locking nuts 4034 are in threaded fit with the first screw 4032, and the distance between the two U-shaped clamping plates 4033 is greater than the thickness of the clamping ring 405, so that the clamping ring 405 on the end portion of the movable end of the air cylinder 401 has a certain displacement margin, and therefore the first driving roller 302 can be automatically adjusted according to a steel wire within a certain diameter range without being adjusted by the air cylinder 401, and debugging time is greatly saved.

Further, as shown in fig. 1 and 5, a balance assembly 5 is arranged on the two sliding blocks 404, the balance assembly 5 includes a second screw 501, the second screw 501 penetrates through the L-shaped plate 203 and extends into the sliding hole 204, a shaft sleeve 502 is arranged on the second screw 501, a handwheel 504 is arranged at the upper end of the shaft sleeve 502, and a convex ring 506 extending to the periphery is arranged at the bottom end of the shaft sleeve 502; the L-shaped plate is provided with the gland 503, the hand wheel 504 and the spring 505, and the gland 503 is abutted against the upper surface of the convex ring 506; the bottom end of the second screw 501 is provided with a pressing sleeve 507, a positioning groove 508 is arranged in the pressing sleeve 507, the connecting plate 402 is provided with a fixing seat 509, the fixing seat 509 is provided with a mounting groove 510, and a spring 505 is arranged between the mounting groove 510 and the spring 505. Drive axle sleeve 502 through hand wheel 504 and rotate, axle sleeve 502 drives second screw 501 pivoted and drives second screw 501 and go up and down simultaneously, when second screw 501 descends, the pressure cover 507 extrusion spring 505 of second screw 501 lower extreme, spring 505 atress compression extrudees fixing base 509, fixing base 509 receives the extrusion force simultaneously with slider 404, can effectively reduce the rocking that first drive roller 302 goes up and down and produce when rotating through the balanced subassembly 5 of adjustment both sides, and simultaneously, can also eliminate because of first drive motor 301 is connected to first drive roller 302 one side and lead to the unbalanced influence of both ends atress, avoid first drive roller 302 to produce the slope, thereby guarantee that many steel wires can carry out the constant velocity motion, make many steel wires cut out the equal length steel wire section through the laser.

Further, as shown in fig. 5, a limit screw 511 is inserted into the upper peripheral side of the second screw 501, and the second screw 501 is limited by the above structure, so that the limit structure is simple, the assembly is convenient, and the second screw 501 can be prevented from being separated from the shaft sleeve 502.

Further, as shown in fig. 1, a protection plate 8 is arranged on the support 2, two ends of the protection plate 8 are respectively slidably arranged on the two side plates 201, the protection plate 8 can prevent sundries from being drawn into the first transmission roller 302 or the second transmission roller 304 to affect transmission of steel wires, and a plurality of observation holes 801 for observing the movement condition of the first transmission roller 302 are formed in the protection plate 8.

Further, as shown in fig. 6, the first pre-feeding assembly 7 and the second pre-feeding assembly 704 have the same composition, and each of the first pre-feeding assembly 7 and the second pre-feeding assembly 704 includes two rollers 701 rotatably disposed on the supporting plate 101 via a rotating shaft 702, and a feeding gap 703 for passing a steel wire is disposed between the two rollers 701. Through the direction before the first feeding subassembly 7 of advance of multiunit in the backup pad 101 transports the steel wire, the steel wire contacts with gyro wheel 701 arc surface and can avoid the steel wire to produce the influence processing effect of buckling when leading it.

Principle of operation

The steel wires are guided before being transported through the first pre-feeding assembly 7 and the second pre-feeding assembly 704, so that one steel wire can be conveyed between the adjacent first pre-feeding assemblies 7, the first driving roller 302 and the second driving roller 304 are respectively driven to rotate through the first driving motor 301 and the second driving motor 303 on the motor mechanism 3, the directions of the first driving roller 302 and the second driving roller 304 are opposite, when a plurality of steel wires pass through the transmission gap 305 between the first driving roller 302 and the second driving roller 304, the steel wires are forcibly dragged to move by the first driving roller 302 and the second driving roller 304 while being pressed by the first driving roller 302 and the second driving roller 304, a plurality of guide holes 602 for the steel wires to pass through are formed in a guide plate 601 of the guide assembly 6, each steel wire can accurately reach the processing position of laser cutting through the displacement of the guide hole 602 along the extending direction of the corresponding guide hole 602, thereby realizing the function of automatic steel wire automatic feeding.

Claims

1. The utility model provides a feed mechanism of steel wire laser cutting equipment which characterized in that: the steel wire displacement guide device comprises a rack (1), wherein a support plate (101) is arranged on the rack (1), a bracket (2), a motor mechanism (3) for driving a steel wire to translate and a guide assembly (6) for guiding the steel wire to displace are erected on the support plate (101); the motor mechanism (3) comprises a first driving motor (301) and a second driving motor (303) which are arranged on two sides of the bracket (2); the output end of the first driving motor (301) is connected with a first driving roller (302); the output end of the second driving motor (303) is connected with a second driving roller (304) positioned below the supporting plate; an arc-shaped hole (306) which is matched with the second transmission roller (304) and is communicated with the upper space and the lower space of the support plate (101) is formed in the support plate (101), and a transmission gap (305) for a steel wire to pass through is formed between the first transmission roller (302) and the second transmission roller (304); the guide assembly (6) comprises a guide plate (601) detachably mounted on the support (2), a plurality of guide holes (602) for steel wires to pass through are formed in the guide plate (601), and the first transmission roller (302) and the second transmission roller (304) drive the steel wires to move along the extension direction of the guide holes (602); the steel wire pre-feeding device is characterized in that a plurality of groups of first pre-feeding assemblies (7) acting on corresponding steel wires are arranged on the supporting plate (101), a second pre-feeding assembly (704) is further arranged at the front end between the first pre-feeding assemblies (7), and the middle of the second pre-feeding assembly (704) is connected with the extension line of the corresponding guide hole (602).

2. The feeding mechanism of the steel wire laser cutting device according to claim 1, characterized in that: the support (2) comprises side plates (201) on two sides, and a top plate (202) is connected above the side plates (201) through an L-shaped plate (203); sliding blocks (404) are arranged at two ends of the first transmission roller (302), and sliding holes (204) which are in sliding fit with the sliding blocks (404) are formed in the side plates (201); be equipped with lifting unit (4) on roof (202), lifting unit (4) include cylinder (401), and the flexible end of cylinder (401) runs through roof (202) and is connected with connecting plate (402), and the both sides of connecting plate (402) are connected with two sliders (404) respectively.

3. The feeding mechanism of the steel wire laser cutting device according to claim 2, characterized in that: and the sliding block (404) is provided with a limiting part (406) which is abutted against the two sides of the side plate (201).

4. The feeding mechanism of the steel wire laser cutting device according to claim 2, characterized in that: the utility model discloses a pneumatic cylinder (401) activity end portion is equipped with snap ring (405), be equipped with on connecting plate (402) and be used for coupling assembling (403) that are connected with snap ring (405), coupling assembling (403) are equipped with first screw rod (4032) including setting up bottom plate (4031) on connecting plate (402) on bottom plate (4031), and threaded connection has two U-shaped cardboard (4033) on first screw rod (4032), be equipped with spacing spout (4021) on connecting plate (402), bottom plate (4031) constitutes sliding fit with spacing spout (4021), snap ring (405) joint is between two U-shaped cardboard (4033).

5. The feeding mechanism of the steel wire laser cutting device according to claim 4, wherein: the U-shaped clamping plates (4033) are fixed through locking nuts (4034) arranged on two sides of the U-shaped clamping plates, the locking nuts (4034) are in threaded fit with the first screw (4032), and the distance between the two U-shaped clamping plates (4033) is larger than the thickness of the clamping ring (405).

6. The feeding mechanism of the steel wire laser cutting device according to claim 2, characterized in that: the two sliding blocks (404) are provided with balance assemblies (5), each balance assembly (5) comprises a second screw (501), each second screw (501) penetrates through the corresponding L-shaped plate (203) and extends into the corresponding sliding hole (204), each second screw (501) is provided with a shaft sleeve (502), the upper end of each shaft sleeve (502) is provided with a hand wheel (504), and the bottom end of each shaft sleeve (502) is provided with a convex ring (506) extending towards the periphery; the L-shaped plate is provided with the gland (503), the hand wheel (504) and the spring (505), the gland (503) is abutted against the upper surface of the convex ring (506); the bottom of second screw rod (501) is equipped with presses cover (507), is equipped with constant head tank (508) in pressing cover (507), be equipped with fixing base (509) on connecting plate (402), be equipped with mounting groove (510) on fixing base (509), be equipped with spring (505) between mounting groove (510) and spring (505).

7. The feeding mechanism of the steel wire laser cutting device according to claim 6, wherein: and a limit screw (511) is arranged at the upper end of the second screw (501).

8. The feeding mechanism of the steel wire laser cutting device according to claim 1, characterized in that: the support (2) is provided with a protection plate (8), and two ends of the protection plate (8) are respectively arranged on the two side plates (201) in a sliding manner; and the protection plate (8) is provided with a plurality of observation holes (801) for observing the motion state of the first transmission roller (302).

9. The feeding mechanism of the steel wire laser cutting device according to claim 1, characterized in that: the first pre-feeding assembly (7) and the second pre-feeding assembly (704) are identical in composition and respectively comprise two rollers (701) which are rotatably arranged on the supporting plate (101) through a rotating shaft (702), a feeding gap (703) for a steel wire to pass through is arranged between the two rollers (701), and the feeding gap is connected with the extension line of the corresponding guide hole (602).