CN111958033A

CN111958033A - Bar shearing machine

Info

Publication number: CN111958033A
Application number: CN202010819639.8A
Authority: CN
Inventors: 李五田; 高建立; 刘伟; 夏营; 陈生超; 刘树香
Original assignee: Zhengzhou Research Institute Of Advanced Equipment & Information Industry Technology Co ltd
Current assignee: Zhengzhou Research Institute of Mechanical Engineering Co Ltd
Priority date: 2020-08-14
Filing date: 2020-08-14
Publication date: 2020-11-20
Anticipated expiration: 2040-08-14
Also published as: CN111958033B

Abstract

The invention provides a bar shearing machine, comprising: a feeding mechanism; cut mechanism, cut mechanism includes: the direct-acting power unit comprises a cylinder body and a piston rod; the fixed cutter holder is fixed on the cylinder body; the fixed knife is fixed on the fixed knife holder; the movable cutter holder is fixed at the end part of the piston rod; the movable knife is fixed on the movable knife holder; the fixed knife and the movable knife are both tubular structures, so that the bar penetrates through the fixed knife and the movable knife, the movable knife has an alignment station aligned with the fixed knife and a staggered station staggered with the fixed knife in the process of moving along with the movable knife holder, and the movable knife cuts off the bar in the process of switching from the alignment station to the staggered station. The fixed knife and the movable knife are both of tubular structures, the bar to be cut is positioned in the fixed knife and the movable knife, the bar is cut by the mutual dislocation of the fixed knife and the movable knife, the cut of the bar is relatively flat, the phenomenon of burrs or bending at the cut part is avoided, and the cutting precision is relatively high.

Description

Bar shearing machine

Technical Field

The invention relates to a bar shearing machine.

Background

In the field of machining, bar shearing techniques are often used, in which a shearing machine is used to shear a long object into a section. For example, chinese utility model patent that the publication number is CN207431394U discloses a bar shear convenient to collect, this bar shear includes the base, and the upper surface of base has conveyer, pay-off fixed block, cuts fixed block, protection device and dog from a left side to the right side fixed mounting in proper order. Wherein, rotate on the pay-off fixed block and install from driving wheel and action wheel, the action wheel front end is fixed with the commentaries on classics piece, installs the motor on the base, and the motor is connected with the controller electricity, and the runner is installed to the output of motor, passes through the drive belt transmission between runner and the commentaries on classics piece and is connected. The shearing fixing block is provided with a feeding hole, the upper end of the shearing fixing block is fixedly provided with an oil press, the output end of the oil press is fixedly provided with a cutter, and the oil press is electrically connected with the controller. The protection device comprises a fixing clamp connected with the electric telescopic rod, and the fixing clamp is used for fixing and pressurizing the bar stock. The stop block comprises a top block for the bar stock to abut against and a clamping block movably arranged on the top block.

During operation, the conveying device conveys the bar to the position between the driven wheel and the driving wheel of the feeding fixing block, the controller controls the motor to rotate, the motor drives the driving wheel to rotate through the rotating wheel, the driving belt and the rotating block, and the bar is enabled to move rightwards through the driving wheel and the driven wheel. The right-hand member of bar passes the feed inlet on the shearing fixed block, pushes up the fixture block in the kicking block to the left surface of kicking block is pushed up, and electric telescopic handle work is controlled earlier to the controller afterwards, makes mounting fixture fix the pressurization for the bar, then controls the hydraulic press work, makes the cutter cut the bar, and the bar that the cutting is good drops in the collecting box.

The bar shearing machine cuts off the bar by using the cutter, the left side and the right side of the cutting position of the bar are fixed, the cutter is equivalent to block the bar to cut off, the cutting mode is easy to cause the phenomena of uneven cutting notch, rough edges or bending at the cut part and the like, and the cutting precision is poor.

Disclosure of Invention

The invention aims to provide a bar shearing machine with relatively flat cut and relatively high cutting precision.

In order to achieve the purpose, the bar shearing machine adopts the following technical scheme:

a bar cutter comprising:

the feeding mechanism is used for conveying the bar stock;

the shearing mechanism is arranged at the downstream of the feeding mechanism and is used for cutting off the bar stock;

the shearing mechanism comprises:

the direct-acting power unit comprises a cylinder body and a piston rod capable of acting linearly relative to the cylinder body;

the fixed cutter holder is fixed on the cylinder body;

the fixed knife is fixed on the fixed knife holder;

the movable cutter holder is fixed at the end part of the piston rod and moves along with the piston rod;

the movable knife is fixed on the movable knife holder and moves along with the movable knife holder;

wherein, stationary knife and movable sword are the tubular structure to supply the bar to pass stationary knife and movable sword, the movable sword has the alignment station that aligns with the stationary knife, still has the station that staggers with the stationary knife at the in-process that moves along with the movable blade holder, and the movable sword is cutting off the bar in the in-process that switches to the station that staggers by the alignment station.

The beneficial effects of the above technical scheme are that:

the invention utilizes the direct-acting power unit to fix the fixed cutter holder on the cylinder body, and the movable cutter holder is fixed at the end part of the piston rod, so that the movable cutter holder can move along with the piston rod, and the relative position of the movable cutter holder and the fixed cutter holder is changed. Because the fixed knife on the fixed knife holder and the movable knife on the movable knife holder are both of tubular structures, the bar can penetrate through the fixed knife and the movable knife, meanwhile, the movable knife has an alignment station aligned with the fixed knife in the process of moving along with the movable knife holder, and also has a staggered station staggered with the fixed knife, so that when the movable knife is positioned at the alignment station, the bar can be conveyed through the fixed knife and the movable knife, when the movable knife is switched to the staggered station from the alignment station, the bar can be cut off, the cut bar is temporarily kept in the movable knife, when the movable knife is positioned at the alignment station again, the bar at the rear part is continuously conveyed, the bar in the movable knife can be ejected out, and the new bar to be cut off continuously enters the movable knife, and the circulation is carried out, and the continuous cutting off of the bar can be realized.

The fixed knife and the movable knife are both of tubular structures, the bar to be cut is positioned in the fixed knife and the movable knife, and the cutting of the bar is realized by the mutual dislocation of the fixed knife and the movable knife.

Further, for convenient fixed blade holder, the stationary knife, the manufacturing assembly of activity blade holder and activity sword and the removal of activity blade holder and activity sword, the stationary knife holder is cubic, be provided with the guiding hole that supplies the activity blade holder to lead the removal wherein on the stationary knife holder, the activity blade holder sets up in the guiding hole, be provided with on the stationary knife holder and supply the stationary knife to insert and fix the fixed orifices wherein, fixed orifices and guiding hole intercommunication, the activity sword runs through the activity blade holder, be provided with the through hole that supplies the activity sword to run through on the activity blade holder, the one end of activity sword cooperates in order to cut off the bar with the stationary knife, fixed blade holder is worn out to the other end of activity sword, be provided with on the stationary knife holder and supply the activity sword to wear out and supply the dodge groove of activity sword wherein to remove.

Further, for the convenient manufacturing of fixed blade holder and activity blade holder, guarantee that the incision of bar is level and smooth to conveniently observe the cooperation condition of activity sword and fixed sword, the guiding hole is the round hole, and the activity blade holder is cylindricly, is equipped with the tangent plane face that sets up towards the fixed sword on the activity blade holder, has the clearance between the pore wall of tangent plane face and guiding hole, and activity sword and fixed sword matched with one end stretch into in the clearance respectively.

Furthermore, in order to facilitate installation and replacement of the fixed knife, the fixed knife is conveniently fixed on the fixed knife holder, the fixed knife is tightly fixed on the fixed knife holder through a jacking bolt which is connected to the fixed knife holder through threads, and a jacking plane which is used for being in jacking fit with the jacking bolt is arranged on the outer peripheral surface of the fixed knife.

Further, for the installation and the change of convenient activity sword, conveniently fix the activity sword on movable blade holder, the activity sword compresses tightly through the clamp plate and fixes on movable blade holder, and the clamp plate passes through fixing bolt to be fixed on movable blade holder, is provided with the mounting groove that supplies the clamp plate to pack into on the activity blade holder, the tank bottom of mounting groove be provided with fixing bolt complex screw hole, the tank bottom and the through hole intercommunication of mounting groove are satisfied to the groove depth of mounting groove to make the clamp plate can contact the activity sword in the through hole and compress tightly the activity sword.

Furthermore, in order to facilitate the connection between the movable tool apron and the piston rod and simplify the structure of the movable tool apron, the movable tool apron is fixed at the end part of the piston rod through a locking bolt, a bolt through hole for the locking bolt to pass through is formed in the movable tool apron, and the bolt through hole and the threaded hole are coaxially arranged.

Furthermore, in order to facilitate the processing of the pressing plate and the movable knife holder, the pressing plate is convenient to compress the movable knife, the bottom of the mounting groove is flat, the pressing plate is flat, and a pressing plane which is used for being in pressing fit with the pressing plate is arranged on the outer peripheral surface of the movable knife.

Furthermore, in order to facilitate connection between the feeding mechanism and the shearing mechanism, the feeding mechanism and the shearing mechanism are fixedly connected through a connecting plate, and a connecting hole connected with the connecting plate is formed in the fixed cutter holder.

Further, in order to make things convenient for the bar to get into feeding mechanism, feeding mechanism includes first delivery wheel and the second delivery wheel on frame and the installation frame, first delivery wheel and second delivery wheel are used for arranging the both sides at the bar and with bar rolling friction contact, in order to carry the bar, wherein first delivery wheel is fixed unmovable fixed wheel, the second delivery wheel is for being close to or keeping away from the movable wheel that first delivery wheel set up, feeding mechanism still includes the slider, the slider is installed in the frame along the direction removal that is close to or keeps away from first delivery wheel, the second delivery wheel rotates and installs on the slider, the screw rod is installed to relative pivoted in the frame, screw rod and slider threaded connection constitute screw-nut drive mechanism, in order to adjust the position of slider through rotatory screw rod.

Further, in order to straighten the bar stock, the bar shear further comprises a straightening mechanism arranged at the upstream of the feeding mechanism.

Drawings

FIG. 1 is a block diagram of a bar shear according to the present invention;

FIG. 2 is a cross-sectional view of the shearing mechanism of the bar shear of the present invention;

FIG. 3 is a partial perspective view of the shearing mechanism of the bar shear of the present invention;

FIG. 4 is a perspective view of the fixed tool holder of FIGS. 2 and 3;

FIG. 5 is a structure diagram of the movable knife seat, the movable knife and the fixed knife in FIG. 2 and FIG. 3;

FIG. 6 is a perspective view of the movable blade holder of FIGS. 2, 3 and 5 from one perspective;

FIG. 7 is a perspective view of another perspective view of the movable tool holder;

FIG. 8 is an exploded view of the feed mechanism of the bar shear of the present invention;

FIG. 9 is an exploded view of the partial structure of FIG. 8;

FIG. 10 is a view showing a structure of a straightening mechanism of a bar shear according to the present invention.

In the figure: 10-a shearing mechanism; 11-a cylinder body; 12-a piston rod; 13-fixing the tool apron; 131-wing plate; 132-first bolt perforation; 133-a first threaded hole; 134-fixing holes; 135-connecting hole; 136-a pilot hole; 137-avoidance groove; 14-a stationary knife; 141-top pressure plane; 15-movable knife holder; 151-mounting grooves; 152-a second threaded hole; 153-second bolt perforation; 154-plain section; 155-a through-hole; 156-communication port; 157-grooves; 16-a platen; 161-third bolt penetration; 162-cutting corners; 17-a movable knife; 171-pressing plane; 20-a feeding mechanism; 21-a stop plate; 22-screw rod; 221-screwing section; 222-a threaded segment; 23-a slide block; 231-U-shaped card slots; 232-threaded hole; 24-a second feed wheel; 25-box cover; 251-wrench through hole; 252-a fixation hole; 253-perforating; 26-a second bearing; 27-a second axle; 271-screwing section; 28-a box body; 281-U-shaped mounting grooves; 282-bearing mounting holes; 283-a gear via; 284-fixation holes; 29-a drive motor; 210-a reducer; 211-a drive gear; 212-a drive gear; 213-a first axle; 214-a first feeding wheel; 30-a straightening mechanism; 31-a scaffold; 32-vertical straightening wheel group; 33-transverse straightening wheel group; 34-a # -shaped wheel group; 40-bar stock; 50-connecting plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The features and properties of the present invention are described in further detail below with reference to examples.

One embodiment of the bar shear of the present invention is shown in fig. 1, and includes a shearing mechanism 10, a feeding mechanism 20, and a straightening mechanism 30, wherein the feeding mechanism 20 and the straightening mechanism 30 are disposed in series upstream of the shearing mechanism 10.

The shearing mechanism 10 is used for cutting off the bar 40, and the shearing mechanism 10 includes a linear motion power unit, in this embodiment, the linear motion power unit is a gas-liquid pressure cylinder, and as shown in fig. 2, the gas-liquid pressure cylinder includes a cylinder body 11 and a piston rod 12 capable of linearly moving relative to the cylinder body 11. A fixed knife holder 13 is fixed on the cylinder body 11, and a fixed knife 14 is detachably fixed on the fixed knife holder 13. The end of the piston rod 12 is fixed with a movable tool holder 15 moving along with the piston rod 12, and a movable knife 17 is detachably fixed on the movable tool holder 15.

Specifically, as shown in fig. 3 and 4, the fixed tool holder 13 is block-shaped, the fixed tool holder 13 is detachably fixed at the end of the cylinder 11 by a first bolt (not shown), the fixed tool holder 13 is provided with an upper wing plate 131 and a lower wing plate 131, and the upper wing plate 131 and the lower wing plate 131 are respectively provided with a first bolt through hole 132 for passing the first bolt.

The fixed knife holder 13 is provided with a guide hole 136 for guiding the movable knife holder 15 to move therein, the movable knife holder 15 is arranged in the guide hole 136, the guide hole 136 is a circular hole, and the movable knife holder 15 is cylindrical. As shown in fig. 4, the fixed holder 13 is provided with a fixing hole 134 into which the fixed blade 14 is inserted and fixed, and the fixing hole 134 communicates with the guide hole 136. Specifically, the fixed blade 14 is a tubular structure for allowing the bar stock to pass through the fixed blade 14, the fixed blade 14 is tightly pressed and fixed on the fixed blade holder 13 by a tightening bolt (not shown in the figure) screwed on the fixed blade holder 13, and the fixed blade holder 13 is provided with a first threaded hole 133 for mounting the tightening bolt. In order to facilitate the press-fitting between the press-fitting bolt and the fixed cutter 14, as shown in fig. 5, a press-fitting flat surface 141 for press-fitting with the press-fitting bolt is provided on the outer peripheral surface of the fixed cutter 14.

The movable knife 17 is also of tubular construction to allow the bar stock to pass through the movable knife 17. The movable knife 17 penetrates the movable knife holder 15, and as shown in fig. 6 and 7, a through hole 155 through which the movable knife 17 penetrates is provided in the movable knife holder 15. One end of the movable knife 17 is matched with the fixed knife 14 to cut off the bar stock, as shown in fig. 3, the other end of the movable knife 17 penetrates out of the fixed knife seat 13, for this purpose, an avoiding groove 137 for the movable knife 17 to penetrate out and for the movable knife 17 to move in is arranged on the fixed knife seat 13, and the avoiding groove 137 is communicated with the guide hole 136, as shown in fig. 4.

As shown in fig. 5, 6 and 7, the movable knife holder 15 is provided with a flat surface 154 arranged towards the fixed knife 14, a gap is formed between the flat surface 154 and the hole wall of the guide hole 136, the end of the movable knife 17 penetrates out of the flat surface 154 and extends into the gap, and the end of the fixed knife 14 matched with the end of the movable knife 14 also extends into the gap, so that the end surfaces of the movable knife 17 and the fixed knife 14 can be both arranged as planes, thereby ensuring the smoothness of the cut of the bar stock, and simultaneously facilitating observation of the matching condition of the movable knife 17 and the fixed knife 14.

As shown in fig. 2 and 3, the movable knife 17 is pressed and fixed on the movable knife seat 15 by the pressing plate 16, and the pressing plate 16 is fixed on the movable knife seat 15 by a fixing bolt (not shown in the figure), as shown in fig. 3, the pressing plate 16 is a flat plate, a third bolt through hole 161 for the fixing bolt to pass through is provided on the pressing plate 16, and in order to avoid interference, four corners of the pressing plate 16 are provided with chamfers 162.

As shown in fig. 5 and 6, the movable tool holder 15 is provided with an installation groove 151 into which the pressing plate 16 is inserted, the bottom of the installation groove 151 is flat, and the bottom of the installation groove 151 is provided with a second threaded hole 152 engaged with the fixing bolt. The groove depth of the mounting groove 151 satisfies that the groove bottom of the mounting groove 151 communicates with the through hole 155, that is, when the mounting groove 151 is machined, the groove depth satisfies that a communicating opening 156 communicating with the through hole 155 can be exposed at the groove bottom of the mounting groove 151, so that the pressing plate 16 can contact the movable knife 17 in the through hole 155 and press the movable knife 17. In order to facilitate the press-fit between the movable knife 17 and the pressing plate 16, as shown in fig. 5, a pressing plane 171 for press-fitting with the pressing plate 16 is provided on the outer peripheral surface of the movable knife 17.

In addition, the movable knife holder 15 is fixed at the end of the piston rod 12 by a locking bolt (not shown in the figures), and a second bolt through hole 153 for the locking bolt to pass through is formed in the movable knife holder 15, as shown in fig. 6 and 7, the second bolt through hole 153 and the second threaded hole 152 are coaxially arranged, so that when the movable knife holder 15 is assembled, the movable knife holder 15 can be fixed at the end of the piston rod 12 by the locking bolt, and then the pressing plate 16 is installed by the fixing bolt, so that the movable knife 17 is pressed and fixed on the movable knife holder 15. To facilitate the screwing operation of the locking bolt, the diameter of the second threaded hole 152 is larger than the outer diameter of the head of the locking bolt. In addition, in order to facilitate the connection between the movable tool holder 15 and the piston rod 12, a groove 157 is provided on the end surface of the movable tool holder 15 facing the piston rod 12, and the end of the piston rod 12 is inserted into the groove 157.

In addition, as shown in fig. 1, the feeding mechanism 20 and the shearing mechanism 10 are fixedly connected through a connecting plate 50, the fixed knife 14 passes through the connecting plate 50, and as shown in fig. 4, a connecting hole 135 connected with the connecting plate 50 is formed in the fixed knife holder 13.

When the shearing mechanism 10 is in operation, the movable tool holder 15 moves along with the piston rod 12, so that the relative position of the movable tool holder 15 and the fixed tool holder 13 changes. The movable knife 17 moves along with the movable knife holder 15, and the movable knife 17 has an alignment station (as shown in fig. 5) aligned with the fixed knife 14 and a staggered station (as shown in fig. 2) staggered with the fixed knife 14 in the process of moving along with the movable knife holder 15, so that when the movable knife 17 is at the alignment station, the bar 40 can be conveyed through the fixed knife 14 and the movable knife 17, when the movable knife 17 is switched from the alignment station to the staggered station, the bar 40 can be cut off, the cut bar is temporarily left in the movable knife 17, when the movable knife 17 is again at the alignment station, the rear bar is continuously conveyed, the bar in the movable knife 17 can be ejected, and a new bar to be cut off continuously enters the movable knife 17, and the processes are repeated, so that the continuous cutting of the bar can be realized.

The fixed knife 14 and the movable knife 17 are both of tubular structures, the bar material 40 to be cut is positioned in the fixed knife 14 and the movable knife 17, and the cutting of the bar material is realized by the mutual dislocation of the fixed knife 14 and the movable knife 17.

The feeding mechanism 20 includes a frame, as shown in fig. 8, the frame includes a box 28 and a box cover 25 fixed on the box 28, the box 28 and the box cover 25 are detachably fixed by bolts, a fixing hole 284 is provided on the box 28, and a corresponding fixing hole 252 is provided on the box cover 25. The feeding mechanism 20 further comprises a first feeding wheel 214 and a second feeding wheel 24, the first feeding wheel 214 is located below the second feeding wheel 24, and the first feeding wheel 214 and the second feeding wheel 24 are respectively provided with two feeding wheels, and are arranged in parallel left and right.

The first feeding wheel 214 is fixedly mounted on a first wheel shaft 213, an axis of the first wheel shaft 213 extends in a front-rear direction, the first wheel shaft 213 is rotatably mounted on a front side wall of the box body 28 through a first bearing (not shown in the figure), and a bearing mounting hole 282 for mounting the first bearing is formed on the front side wall of the box body 28. The first feeding wheel 214 is located outside the box body and is a fixed wheel which is fixed and immovable, the first feeding wheel 214 is fixed at the front end of a first wheel shaft 213, and the rear end of the first wheel shaft 213 extends into the box body 28 and is provided with a transmission gear 212.

The feeding mechanism 20 further comprises a driving device for driving the first feeding wheel 214 to rotate, the driving device comprises a driving motor 29, a speed reducer 210 and a driving gear 211, and the speed reducer 210 is in transmission connection between an output shaft of the driving motor 29 and the driving gear 211. The driving gear 211 is engaged with the transmission gears 212 on the two first wheel shafts 213 for transmission, so as to drive the two first wheel shafts 213 to rotate synchronously, and a gear through hole 283 is arranged on the rear side wall of the box body 28.

The second feeding wheel 24 is a movable wheel which can be close to or far from the first feeding wheel 214, specifically, the feeding mechanism 20 further includes a sliding block 23, as shown in fig. 9, a second wheel shaft 27 is connected to the sliding block 23 through a thread, the second feeding wheel 24 is rotatably mounted on the second wheel shaft 27 through a second bearing 26, a thread section is provided on the second wheel shaft 27, and the second wheel shaft 27 is connected with the sliding block 23 through a thread section.

The slider 23 is movably guided in a direction close to or away from the first feeding wheel 214 and mounted on the box 28, as shown in fig. 8, a U-shaped mounting groove 281 for mounting the slider is provided on the front side wall of the box at the radial upper side of the bearing mounting hole 282, the U-shaped mounting groove 281 penetrates through the front side wall of the box, and the opening of the U-shaped mounting groove 281 is disposed toward the box cover 25, that is, upward. The slider 23 is installed in the U-shaped mounting groove 281, and the two opposite side surfaces, that is, the left and right side surfaces of the slider 23 are respectively provided with a U-shaped slot 231 for being clamped outside the slot walls at the two sides of the U-shaped mounting groove 281, as shown in fig. 9, the slider 23 is clamped on the front side wall of the box body through the U-shaped slot 231, and the cross section of the slider 23 is i-shaped, so that the slider 23 is limited in the front-back direction while being guided and moved up and down.

The slider 23 is provided with a threaded hole 232, the feeding mechanism 20 further includes a screw 22 cooperatively connected with the threaded hole 232, the screw 22 is relatively rotatably mounted on the box cover 25, specifically, the screw 22 penetrates through the box cover, and the box cover 25 is provided with a through hole 253. The screw 22 is in a stepped shaft shape, the large diameter section thereof is a threaded section 222, the small diameter section is fixed with a stop plate 21, and the stop plate 21 is in stop fit with the box cover 25. The screw 22 and the slider 23 form a screw nut transmission mechanism, when the screw 22 is rotated, the stopper plate 21 is in stop fit with the box cover 25, so that only the screw 22 rotates, and the slider 23 can only move up and down under the guiding action of the U-shaped clamping groove 231 and the front side wall of the box body, so as to drive the second feeding wheel 24 to be close to or far away from the first feeding wheel 214, thereby realizing the up-and-down position adjustment. In order to facilitate the rotation of the screw 22, a screw segment 221 is provided at the upper end of the screw 22.

In addition, since the second wheel shaft 27 and the slider 23 are screw-coupled, the relative positions of the second feeding wheel 24 and the slider 23 can be adjusted by rotating the second wheel shaft 27. Specifically, the second axle 27 is disposed through the slider 23, the second bearing 26 is mounted at the front end of the second axle 27, the rear end of the second axle 27 extends into the box 28, a screwing structure, i.e., a screwing segment 271, for screwing a wrench is disposed at the rear end of the second axle 27, and wrench passing holes 251 are disposed on the box cover 25 at positions corresponding to the screwing segments 271 on the two second axles 27, as shown in fig. 8, and the wrench passing holes 251 are strip-shaped holes.

As shown in fig. 10, the straightening mechanism 30 includes a bracket 31, a vertical straightening wheel group 32, a horizontal straightening wheel group 33 and a # -shaped wheel group 34, the bracket 31 is fixedly connected with the box 28 of the feeding mechanism 20, and the structural arrangement and the operation principle of the vertical straightening wheel group 32, the horizontal straightening wheel group 33 and the # -shaped wheel group 34 are the same as those in patent document CN207709738U, except for the number and the spacing of the wheels, which will not be described in detail in the present invention.

When the bar shearing machine is used, firstly, the screw rod 22 is rotated, the sliding block 23 moves upwards, the second feeding wheel 24 is driven to be far away from the first feeding wheel 214, the distance between the two feeding wheels is enlarged, so that the bar 40 can conveniently enter the space between the two feeding wheels, after the bar 40 enters, the screw rod 22 is rotated reversely, the second feeding wheel 24 and the first feeding wheel 214 are tightly pressed on the two sides of the bar 40 and are in rolling friction contact with the bar 40, and the bar 40 can be conveyed. If the front and back positions of the second feeding wheel 24 and the first feeding wheel 214 do not correspond, the second wheel shaft 27 can be rotated to directly adjust the front and back positions of the second feeding wheel 24, so that the two feeding wheels correspond. In the use, through the position of adjusting the slider 23, can adjust the contact force between two feeding wheels and the bar, make two feeding wheels remain better contact effect all the time, and then guarantee the pay-off effect. In addition, the fixed knife 14 and the movable knife 17 are replaced, and the distance between the second feeding wheel 24 and the first feeding wheel 214 is changed, so that the bar shearing machine can be suitable for shearing bars with different diameters, and the application range is expanded.

In other embodiments of the bar shears, the bar shears may not include a straightening mechanism.

In other embodiments of the bar shear, the first feed wheel and the second feed wheel may both be fixed wheels, with a non-adjustable spacing therebetween.

In other embodiments of the bar shears, the direct-acting power unit in the shearing mechanism may also be a hydraulic or pneumatic cylinder.

In other embodiments of the bar shear, the connecting plate may also be fixedly connected to the cylinder in the shearing mechanism.

In other embodiments of the bar shear, the web may be omitted and the feed mechanism and the shearing mechanism directly connected.

In other embodiments of the bar shear, the pressing plate may be an arc-shaped pressing plate, the bottom of the installation groove is not a flat bottom but an arc-shaped bulge, and the arc-shaped pressing plate may directly press the outer cylindrical surface of the movable knife without providing a pressing plane on the movable knife.

In other embodiments of the bar shear, the bolt through hole of the movable blade holder for passing the locking bolt and the threaded hole for mounting the fixing bolt may not be coaxially arranged, but may be separately arranged on the movable blade holder with their axes parallel.

In other embodiments of the bar shear, the movable blade holder may also be welded directly to the end of the piston rod.

In other embodiments of the bar shear, the movable blade may be fastened to the movable blade holder by a jackscrew, and the pressing plate may be omitted.

In other embodiments of the bar shears, the movable blade may also be welded to the movable blade holder.

In other embodiments of the bar shear, when the fixed blade is tightly pressed and fixed on the fixed blade holder by the pressing bolt, the pressing plane may not be disposed on the fixed blade, and the pressing bolt directly presses the outer circumferential surface of the fixed blade.

In other embodiments of the bar shear, the fixed blade may also be welded to the fixed blade holder.

In other embodiments of the bar shear, the guide hole of the fixed blade holder may be a square hole instead of a round hole, and the movable blade holder is in the shape of a square block.

In other embodiments of the bar shear, the movable blade holder is not disposed in the guide hole of the fixed blade holder, and the movable blade holder and the fixed blade holder are disposed in parallel at intervals, and the fixed blade holder is narrower and disposed beside the movable blade holder.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.

Claims

1. A bar cutter comprising:

the feeding mechanism is used for conveying the bar stock;

it is characterized in that the shearing mechanism comprises:

the fixed cutter holder is fixed on the cylinder body;

the fixed knife is fixed on the fixed knife holder;

2. A bar shear according to claim 1, wherein the fixed blade holder is block-shaped, the fixed blade holder is provided with a guide hole for guiding the movable blade holder to move therein, the movable blade holder is disposed in the guide hole, the fixed blade holder is provided with a fixing hole for the fixed blade to be inserted and fixed therein, the fixing hole is communicated with the guide hole, the movable blade passes through the movable blade holder, the movable blade holder is provided with a through hole for the movable blade to pass through, one end of the movable blade is matched with the fixed blade to cut off the bar, the other end of the movable blade passes through the fixed blade holder, the fixed blade holder is provided with an avoidance groove for the movable blade to pass through and move therein, and the avoidance groove is communicated with the guide hole.

3. A bar shear according to claim 2, wherein the guide hole is a circular hole, the movable blade holder is cylindrical, the movable blade holder is provided with a flat surface facing the fixed blade, a gap is provided between the flat surface and the wall of the guide hole, and the ends of the movable blade and the fixed blade which are engaged with each other respectively extend into the gap.

4. A bar shear according to claim 2 or 3, wherein the fixed blade is fastened to the fixed blade holder by a fastening bolt screwed to the fixed blade holder, and a fastening plane for fastening the fastening bolt is provided on the outer circumferential surface of the fixed blade.

5. A bar shearing machine according to claim 2 or 3, wherein the movable blade is fixed on the movable blade holder by pressing plate, the pressing plate is fixed on the movable blade holder by fixing bolt, the movable blade holder is provided with a mounting groove for the pressing plate to be mounted, the bottom of the mounting groove is provided with a threaded hole matched with the fixing bolt, and the depth of the mounting groove is such that the bottom of the mounting groove is communicated with the through hole, so that the pressing plate can contact the movable blade in the through hole and press the movable blade.

6. A bar shear according to claim 5, wherein the movable blade holder is secured to the end of the piston rod by a locking bolt, the movable blade holder being provided with a bolt bore through which the locking bolt passes, the bolt bore being coaxial with the threaded bore.

7. A bar shear according to claim 5, wherein the bottom of the mounting groove is flat, the pressing plate is a flat plate, and the outer peripheral surface of the movable blade is provided with a pressing plane for pressing and matching with the pressing plate.

8. A bar shear according to any one of claims 1 to 3, wherein the feeding mechanism and the shearing mechanism are fixedly connected by a connecting plate, and the fixed blade holder is provided with a connecting hole connected with the connecting plate.

9. A bar shear according to any one of claims 1 to 3, wherein the feed mechanism comprises a frame and a first feed wheel and a second feed wheel mounted on the frame, the first feed wheel and the second feed wheel are arranged on two sides of the bar and are in rolling friction contact with the bar to feed the bar, the first feed wheel is a fixed and immovable fixed wheel, the second feed wheel is a movable wheel that can be arranged close to or away from the first feed wheel, the feed mechanism further comprises a slide block, the slide block is mounted on the frame in a guiding and moving manner in a direction close to or away from the first feed wheel, the second feed wheel is rotatably mounted on the slide block, a screw rod is mounted on the frame in a relatively rotatable manner, the screw rod is in threaded connection with the slide block and forms a screw nut transmission mechanism to adjust the position of the slide block by rotating the screw rod.

10. A bar shear according to any of claims 1 to 3, further comprising a straightening mechanism arranged upstream of the feed mechanism.