CN110788382B - Two-way round steel cutter of pneumatic cylinder drive link mechanism - Google Patents
Two-way round steel cutter of pneumatic cylinder drive link mechanism Download PDFInfo
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- CN110788382B CN110788382B CN201910930994.XA CN201910930994A CN110788382B CN 110788382 B CN110788382 B CN 110788382B CN 201910930994 A CN201910930994 A CN 201910930994A CN 110788382 B CN110788382 B CN 110788382B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D15/00—Shearing machines or shearing devices cutting by blades which move parallel to themselves
- B23D15/04—Shearing machines or shearing devices cutting by blades which move parallel to themselves having only one moving blade
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D15/00—Shearing machines or shearing devices cutting by blades which move parallel to themselves
- B23D15/12—Shearing machines or shearing devices cutting by blades which move parallel to themselves characterised by drives or gearings therefor
- B23D15/14—Shearing machines or shearing devices cutting by blades which move parallel to themselves characterised by drives or gearings therefor actuated by fluid or gas pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D33/00—Accessories for shearing machines or shearing devices
- B23D33/02—Arrangements for holding, guiding, and/or feeding work during the operation
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Abstract
The invention relates to a two-way round steel shearing machine with a hydraulic cylinder driving link mechanism, which mainly comprises a hydraulic power device, a transmission device, a shearing device, a frame, a double-layer conveying roller way and a lateral clamping device, wherein the double-layer conveying roller way and the lateral clamping device are arranged up and down, and the two-way round steel shearing machine is characterized in that: the shearing device comprises two fixed cutter tables, a double-cutting movable cutter table and two round steel shearing arc-shaped shearing blades fixed on the cutter tables; two upper connecting rods in the transmission device are fixed on the rack, and the round steel groups are conveyed to a specific shearing position of the fixed cutter platform by a double-layer conveying roller way arranged up and down under the coordination of the lateral clamping device; the lower round steel group and the upper round steel group are respectively sheared by the descending and ascending of the double-cutting movable knife platform fixedly connected with the end part of the lower connecting rod of the transmission device under the driving of the hydraulic power device. The semicircular arc-shaped sectional arc-shaped shear blade provided by the invention improves the stress of the shear blade and effectively improves the shearing quality of round steel.
Description
Technical Field
The invention belongs to the technical field of round steel shearing, and particularly relates to a bidirectional round steel shearing machine with a hydraulic cylinder driving link mechanism.
Technical Field
In the production of the ferrous metallurgy industry, a highly automatic cold shearing machine is generally used for shearing incoming materials in a head-to-tail and fixed size mode so as to meet the requirements of production life on the end face yield, appearance and size of round steel. The round steel cold shearing machine has a large proportion in shearing equipment, and has wide application prospect in vehicle engineering, ferrous metallurgy, mechanical manufacturing and other industries. However, the round steel cold shears applied in the market at present still have certain defects, for example, most shears still use the traditional motor for driving, the shearing mechanism has a more complex structure and lower shearing efficiency, and the quality of sheared products is not very high. The most common failures for shears are loosening of the coupling fasteners and wear of the pin, etc. connections of parts such as connecting rods, thrust rods, etc. Common accidents in shearing mechanisms are bending, breaking and other problems of parts such as connecting rods. These phenomena seriously affect the service life of the shearing machine, and the existing shearing machine has the following adverse phenomena:
1. the shear blade in the shearing device is directly contacted with round steel to be sheared to bear all shearing force, so that the round steel is frequently abraded, and the surface of the round steel has local pits, cracks, even breaks and the like;
2. when the hydraulic technology is applied to a large shearing machine with overlarge shearing force, hydraulic impact can be caused if the reversing is too fast, and a hydraulic element is seriously damaged, so that the hydraulic shearing machine at the present stage can prolong the reversing time to weaken the damage of the impact on the hydraulic element, the production efficiency is restricted to a great extent, and when the hydraulic cylinder provides large thrust, the working pressure of a hydraulic system is very high, the sealing requirement on each part in the hydraulic system is extremely high, and the maintenance cost is expensive;
3. the conventional shear only works during the downward shearing stroke during a complete shearing process, while the shearing mechanism does not work during the return stroke, which means that half of the time is "wasted" during a complete shearing process.
Disclosure of Invention
In view of the above technical problems, an object of the present invention is to provide a bidirectional round steel shearing machine with a link mechanism driven by a hydraulic cylinder, wherein two shearing actions are achieved in a complete shearing process by upper and lower sets of shear blades of a double-cutting movable cutting table, and the shearing process of a round steel group is jointly completed by sequentially exerting the functions of different arc sections through the design of an arc shear blade group with a sectional type multi-section arc-shaped cutting edge, so that the stress state of the shear blades is optimized, and the shearing quality of the round steel is improved.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the bidirectional round steel shearing machine with the hydraulic cylinder driving link mechanism is used for shearing round steel by using the arc-shaped shearing blade with the sectional type multi-section arc-shaped cutting edge so as to obtain a high-quality shearing section. The up going and down going of the shearing device can finish shearing action, and high-efficiency shearing of round steel is realized. The specific operation is to adopt a double hydraulic cylinder to drive a round steel shearing device of a symmetrical sectional multi-section arc-shaped shearing edge group assembled on a double-cutting movable knife rest and a specific shearing method.
The structure of the invention mainly comprises a hydraulic power device, a transmission device, a shearing device, a frame, a double-layer conveying roller way and a lateral clamping device which are arranged up and down, wherein the shearing device comprises two fixed cutter tables, a double-cutting movable cutter table and two round steel shearing arc-shaped shearing blades fixed on the cutter tables; two upper connecting rods in the transmission device are fixed on the rack, and the round steel groups are conveyed to a specific shearing position of the fixed cutter platform by a double-layer conveying roller way arranged from top to bottom under the coordination of the lateral clamping device. The lower round steel group and the upper round steel group are respectively sheared by the descending and ascending of the double-cutting movable knife platform fixedly connected with the end part of the lower connecting rod of the transmission device under the driving of the hydraulic power device.
The hydraulic power device is two hydraulic cylinders which are horizontally arranged and symmetrically arranged on two sides of the rack in a pin shaft hinge mode, and the tail ends of piston rods of the two hydraulic cylinders are respectively hinged with a cross rod in the transmission device; the hydraulic cylinder is a piston type double-acting oil cylinder, and the push-pull action of the oil cylinder can be controlled by controlling the oil inlet and outlet directions of the two oil ports at different shearing stages.
The shearing device comprises two fixed cutter tables, a double-cutting movable cutter table and two round steel shearing arc-shaped shearing blades fixed on the cutter tables; the upper fixed cutter platform and the lower fixed cutter platform are both fixed on the frame, and arc-shaped shearing blade groups with semi-arc-shaped cutting edges are arranged on the two fixed cutter platforms and mainly used for positioning and shearing the round steel; the upper and lower parts of the double-cutting movable knife platform are respectively provided with an arc-shaped cutting edge group with a sectional arc-shaped cutting edge, and synchronous reciprocating cutting action is completed under the action of a transmission device.
The lateral clamping device is characterized in that the outer side pressing plate and the inner side pressing plate are both provided with a group of arc-shaped clamping grooves and driven by the left single-action clamping cylinder and the right single-action clamping cylinder, so that the round steel is closer to a completely clamped state in the shearing process, and the shearing quality is improved.
The double-layer roll gang arranged up and down is two groups of round steel roll gang arranged up and down and is independently controlled by a motor.
The double-cutting movable knife rest is driven by a double-parallelogram-shaped connecting rod transmission mechanism to do reciprocating shearing motion; arc-shaped shear blade groups with sectional multi-section arc-shaped cutting edges are respectively arranged on the upper part and the lower part of the double-cutting movable knife platform, wherein the length of the shear blade of the upper arc-shaped group is 1/2-3/5 of that of the lower arc-shaped shear blade group.
The cutting edges of the segmented circular arc-shaped cutting edge groups are formed by three sections of circular arcs, wherein convex arcs are arranged on two sides, and concave arcs are arranged in the middle, and the cutting edges respectively undertake cutting work in different cutting stages; in the crack initiation and expansion stages in the round steel shearing process, the convex arc plays a leading role; the concave arc plays a leading role in the cutting process of the round steel.
The utility model provides a two-way round steel cutter of pneumatic cylinder drive link mechanism, its concrete shearing process is:
(1) the sheared position of the lower round steel group is an initial station, the left hydraulic cylinder provides thrust, and the right hydraulic cylinder provides tension; the lower side provides pulling force for a left clamping cylinder of the clamping device, the right clamping cylinder provides pushing force, the lower round steel group is clamped by the lower side clamping device, and the upper round steel group is conveyed forwards to a shearing position through the upper roller way;
(2) after the lower round steel group finishes shearing, the shearing mechanism moves to the lowest point, and the upper round steel group is conveyed forwards to a shearing position through the upper roller way; the lower side of the upper round steel group is unloaded to the clamping device (the left clamping cylinder provides thrust, the right clamping cylinder provides tension), the left clamping cylinder of the upper side of the lower side of the upper clamping device provides tension, the right clamping cylinder provides thrust, and the upper round steel group is clamped by the upper side of the lower side of the upper side of the lower side; the left hydraulic cylinder still provides thrust, the right hydraulic cylinder still provides tension, the shearing of the upper round steel set is completed, and the lower round steel set is conveyed forwards to a shearing position from the lower roller way;
(3) after the upper round steel group is sheared, the shearing mechanism moves to the highest point, and the upper lateral clamping device is unloaded (the left clamping cylinder provides thrust and the right clamping cylinder provides tension); the two clamping cylinders of the lower lateral clamping device are not reversed, and the second lower round steel set is clamped by the lower lateral clamping device; the left hydraulic cylinder provides a pulling force, the right hydraulic cylinder provides a pushing force, and the second lower round steel set is sheared;
(4) the two clamping cylinders of the upper lateral clamping device are not reversed, and the second upper round steel set is clamped by the upper lateral clamping device. The left hydraulic cylinder still provides pulling force, and the right hydraulic cylinder still provides thrust, cuts round steel group on the second.
By repeating the shearing action, two groups of round steel can be sheared down and up in a complete shearing process (the right row and the left row of the shearing device).
The round steel is transported to the position to be sheared through the double-layer roller ways arranged from top to bottom, the lower roller way transports the round steel to the shearing position firstly, the lateral clamping device compresses the round steel, the double-cutting movable knife platform shears the round steel, and when the mechanism to be sheared drives the double-cutting movable knife platform to move upwards, the upper roller way and the lateral clamping device perform the actions to complete the shearing action of one period.
The design of the shape of the cutting edge of the sectional arc-shaped cutting edge is realized as follows: the shearing process of the round steel is divided into an elastic deformation stage, a plastic deformation stage, crack generation and sliding expansion until the round steel is separated from the cutting head by fracture, and the instantaneous shearing force generated by the transformation of the plastic deformation into the microcrack in the shearing area of the round steel reaches the maximum value; because the round steel gets into the plastic deformation state promptly when the shear blade contacts the round steel promptly, so neglect elastic deformation's influence, because side direction clamping device's effect, make the round steel be close to the complete clamping state, the degree of depth that makes upper and lower shear blade cut into the round steel tends to the unanimity. When the flat-blade shear is used, the shearing force is the largest when the cutting depth is e, and the round steel starts to break. The shearing area is as follows:
in order to realize the labor-saving effect of the round steel shear blade in the shearing process and ensure that the shear blade is reasonably stressed in the plastic deformation stage of the round steel, the side surface of the shear blade is designed into two sections of convex arcs which are symmetrical left and right. In order to save the material of the cutting edge and avoid unnecessary waste of rare and precious metals, the straight line passing through the starting point of the convex arc and the other focus of the excircle of the round steel are the same. And solving the point simultaneously with the round steel excircle equation. In order to ensure that the sheared round steel has good surface quality and reduce the tearing area, the calculation is carried out according to the principle of 'shearing plastic deformation area homogenization', namely:
if the round steel material and the radius R are known, θ can be obtained.
According to actual production, the round steel generates rheological and bending phenomena in the shearing process, so that the stroke of the active cutter is 2.01-2.25 times that of the fixed cutter. The c point coordinates and the lengths of ac and bc are found below.
In summary, if the specification (radius) of the round steel to be cut and the round steel material are known, the convex arc shape of the segmented arc-shaped cutting edge is obtained by the following formula:
wherein theta is the intersection point of the chord of the convex arc and the horizontal axis of the coordinate system taking the center of the round steel as the origin of coordinates;
e, the cutting depth of the round steel when the round steel is broken is related to the round steel material;
k is an upper shear blade stroke coefficient, and K is 1.13-1.57;
r-round steel radius;
R1-convex arc radius;
n-convex arc abscissa;
m-convex arc ordinate.
Arc shear blades are arranged on the upper side and the lower side of the double-cutting movable tool post, the shearing of four groups of round steel can be realized in one complete shearing process, meanwhile, the shearing blades in different multi-section arc-shaped cutting edge shapes can also be used for shearing two types of round steel with different specifications in the same shearing process, and the round steel shearing efficiency is greatly improved. The combined shear blade formed by the multi-section arc-shaped cutting edges in the form of two convex arcs and one concave arc can improve the shearing quality of the round steel, meanwhile, the stress of the arc-shaped shear blade is reasonable, and the labor-saving effect is enhanced.
The invention has the beneficial effects that: the power of the shearing machine is derived from two symmetrically arranged horizontal hydraulic cylinders, the power device is pushed to apply, the upper cutter is further pushed to perform upper cutting type shearing movement, the two hydraulic cylinders act simultaneously, larger power can be provided, the round steel shear can be driven to perform shearing action in the telescopic process of the piston rod of each cylinder, the reversing is not required to be performed frequently, and the problems that the hydraulic oil cylinder is difficult to reverse and the hydraulic system is high in working pressure when the hydraulic cylinders provide large thrust are effectively solved.
Drawings
FIG. 1 is a diagram of the main components of a round steel shearing mechanism according to the present invention;
fig. 2 is a diagram ii of main parts of the round steel shearing mechanism according to the present invention.
FIG. 3 is a schematic view of a lateral clamping device;
FIG. 4 is a schematic view of a double-cutting movable cutting table for cutting round steel with a multi-section arc-shaped cutting edge;
FIG. 5 is a schematic view of an arcuate cutting edge;
fig. 6 is a schematic view of a shearing process.
In the figure: 1. a frame; 2. a left hydraulic cylinder; 3. a right hydraulic cylinder; 4. fixing a cutter table; 5. feeding a round steel group; 6. a lower round steel group; 7. an arc-shaped shear blade group is arranged; 8. double-cutting movable tool post; 9. a lower arc-shaped shear blade group; 10. a lower fixed tool post; 11. feeding the roller bed; 12. an upper lateral clamping device; 13. cutting the round steel; 14. a lower lateral clamping device; 15. a roller way is arranged; 16. a left clamping cylinder; 17. a right clamping cylinder; 18. an outer pressing plate; 19. an inner side pressing plate; 20. and (4) round steel.
Detailed Description
The present application is described below by way of example, and as shown in fig. 1-4, the present invention provides a dual-cylinder driven high quality, high efficiency round bar shearing device having a transmission, a shearing mechanism, a lateral clamping device and a transmission; the cutter platform is provided with two forms of arc-shaped shear blades: the upper and lower sides of the double-cutting movable cutter platform 8 are uniformly provided with cutting edges which are segmented and multi-section arc-shaped, and the shearing mechanism consists of an upper fixed cutter platform 4, the double-cutting movable cutter platform 8, a lower fixed cutter platform 10 and cutting edges fixed on the cutter platforms; the upper fixed cutter platform and the lower fixed cutter platform are respectively fixed on the frame 1, and the double-cutting movable cutter platform 8 is hinged with the transmission mechanism; the lateral clamping device is characterized in that a group of circular arc-shaped clamping grooves are formed in the outer side pressing plate and the inner side pressing plate of the lateral clamping device and driven by the left single-action clamping cylinder and the right single-action clamping cylinder, so that the round steel 20 is closer to a completely clamped state in the shearing process, and the shearing quality is improved; the transmission device adopts a link mechanism, in particular to a double-parallelogram transmission mechanism, which comprises two groups of links between an upper tool rest and a machine frame, wherein two hinge points of the two groups of links are connected by a cross rod to form an upper and a lower groups of parallelogram mechanisms, and the shear force is provided for the shearing mechanism under the action of a left and a right double-acting hydraulic cylinder; as shown in fig. 5, the sectional arc-shaped cutting edge is formed by three sections of arcs, wherein, the two sides are convex arcs, the middle is a concave arc, and the two sections of arcs respectively undertake the shearing work in different shearing stages; the convex arc plays a leading role in the plastic deformation stage in the shearing process, and the concave arc undertakes the shearing work in the crack initiation, propagation and fracture stage.
As shown in fig. 6, a method for shearing round steel with high efficiency and high quality by using a segmented arc-shaped edge is realized by the following steps:
(1) the position of the lower round steel group 6 to be sheared is an initial station, the left hydraulic cylinder 2 provides thrust, and the right hydraulic cylinder 3 provides tension; the lower side provides a pulling force for a left clamping cylinder 16 of the clamping device 14, the right clamping cylinder 17 provides a pushing force, the lower round steel set 6 is clamped by the lower side clamping device 14, and the upper round steel set 5 is conveyed forwards to a shearing position by the upper roller way 11;
(2) after the lower round steel group 6 finishes shearing, the shearing mechanism moves to the lowest point, and the upper round steel group 5 is conveyed forwards to a shearing position from the upper roller way 11; the lower side of the upper clamping device 12 is unloaded to the clamping device 14, the left clamping cylinder 16 of the upper clamping device 12 provides pulling force, the right clamping cylinder 17 provides pushing force, and the upper round steel group 5 is clamped by the upper clamping device 12; the left hydraulic cylinder 16 still provides thrust, the right hydraulic cylinder 17 still provides tension, the shearing of the upper round steel set 5 is completed, and the lower round steel set 6 is conveyed forwards to a shearing position from the lower roller 15;
(3) go up round steel group 4 and accomplish the shearing back, the mechanism of cuting this moment moves the peak, and lower round steel group 6 is pressed from both sides tightly by downside clamping device 14, and left pneumatic cylinder 16 provides thrust this moment, and right pneumatic cylinder 17 provides the pulling force, repeats above-mentioned shearing action, has realized "cutting down" and "cut on" two sets of round steel at a complete shearing in-process, has greatly promoted shearing efficiency.
All other solutions, which can be obtained by a person skilled in the art without making creative efforts based on the solutions of the present invention, belong to the protection scope of the present invention.
Claims (3)
1. The utility model provides a two-way round steel cutter of pneumatic cylinder drive link mechanism, mainly includes hydraulic power device, transmission, shearing mechanism, frame, upper and lower double-deck rollgang and the side direction clamping device who arranges, its characterized in that: the shearing device comprises two fixed cutter tables, a double-cutting movable cutter table and two round steel shearing arc-shaped shearing blades fixed on the cutter tables; two upper connecting rods in the transmission device are fixed on the rack, and the round steel groups are conveyed to a specific shearing position of the fixed cutter platform by a double-layer conveying roller way arranged up and down under the coordination of the lateral clamping device; the lower round steel group and the upper round steel group are respectively sheared by the descending and ascending of a double-cutting movable cutter platform fixedly connected with the end part of a lower connecting rod of the transmission device under the driving of a hydraulic power device;
the hydraulic power device is two hydraulic cylinders which are horizontally arranged and symmetrically arranged on two sides of the rack in a pin shaft hinge mode, and the tail ends of piston rods of the two hydraulic cylinders are respectively hinged with a cross rod in the transmission device; the hydraulic cylinder is a piston type double-acting oil cylinder;
the transmission device adopts a link mechanism, in particular to a double-parallelogram transmission mechanism, and comprises two groups of links between an upper tool rest and a machine frame, wherein two hinge points of the two groups of links are connected by a cross rod to form an upper and a lower groups of parallelogram mechanisms;
the shearing device comprises two fixed cutter tables, a double-cutting movable cutter table and two round steel shearing arc-shaped shearing blades fixed on the cutter tables; the upper fixed cutter platform and the lower fixed cutter platform are both fixed on the frame, and arc-shaped shearing blade groups with semi-arc-shaped cutting edges are arranged on the two fixed cutter platforms and mainly used for positioning and shearing the round steel; arc-shaped shear blade groups with sectional arc-shaped cutting edges are arranged above and below the double-cutting movable cutter platform;
the lateral clamping device is characterized in that a group of circular arc-shaped clamping grooves are formed in the outer side pressing plate and the inner side pressing plate of the lateral clamping device and are driven by a left single-action clamping cylinder and a right single-action clamping cylinder;
the double-layer conveying roller ways arranged up and down are two groups of round steel conveying roller ways arranged up and down and are independently controlled by a motor;
the double-cutting movable knife rest is driven by a double-parallelogram-shaped connecting rod transmission mechanism to do reciprocating shearing motion; the upper and lower parts of the double-cutting movable knife platform are respectively provided with an arc-shaped cutting edge group with a sectional type multi-section arc-shaped cutting edge.
2. The bidirectional round steel shearing machine with the hydraulic cylinder driving connecting rod mechanism as claimed in claim 1, wherein: the cutting edge of the sectional type circular arc-shaped cutting edge group is formed by three sections of circular arcs, wherein the two sides of the cutting edge group are convex arcs, the middle of the cutting edge group is a concave arc, and the cutting edges of the sectional type circular arc-shaped cutting edge group respectively undertake cutting work in different cutting stages.
3. The bidirectional round steel shearing machine with the hydraulic cylinder driving connecting rod mechanism as claimed in claim 1, wherein: the length of the upper arc-shaped group of the cutting edges arranged on the upper portion and the lower portion of the double-cutting movable knife platform is 1/2-3/5 of the length of the lower arc-shaped cutting edge group.
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| CN201910930994.XA CN110788382B (en) | 2019-09-29 | 2019-09-29 | Two-way round steel cutter of pneumatic cylinder drive link mechanism |
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| CN104162714A (en) * | 2014-07-04 | 2014-11-26 | 太原科技大学 | Single hydraulic cylinder driving and roll-cutting type plate shearing machine |
| GB2528664A (en) * | 2014-07-25 | 2016-02-03 | Allspeeds Holdings Ltd | A subsea cutting tool and a blade therefor |
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