Automatic bending machine for producing steel structure metal member
Technical Field
The invention relates to the technical field of bending of steel structure metal components, in particular to an automatic bending machine for producing the steel structure metal components.
Background
In the production of steel structure metal components, an automatic bending machine is very important equipment, and meanwhile, the machine can automatically complete the bending work of the metal plates, so that the production efficiency and the precision are improved.
The existing automatic bending machine for producing the metal components of the steel structure is easy to shift the positions of the metal components during operation and easy to generate errors, and the existing automatic bending machine for producing the metal components of the steel structure can only bend the metal components in one mode and easily cause the quality reduction of the metal components.
Disclosure of Invention
The invention provides an automatic bending machine for producing a steel structure metal member, which has the advantages of various bending modes for the steel structure metal member and capability of carrying out sawtooth cutting on the steel structure metal member in the cutting process, and solves the problems set forth in the background art.
The invention provides the following technical scheme: the utility model provides an automatic bender is used in steel construction metal component production, includes the main body frame, the outer wall of main body frame is fixed mounting respectively has well accuse cabinet, mounting panel, electro-magnet, cutting knife and ultrasonic detection instrument, the outer wall of mounting panel is fixed mounting respectively has driving motor and speed reducer, and driving motor and speed reducer are electric connection with well accuse cabinet, the outer wall joint of main body frame has the roof, the top of roof is equipped with the subassembly of bending, the outer wall of main body frame is equipped with the cutting subassembly, fixing base, mount and feeding frame are installed respectively at the top of roof, the inner wall joint of fixing base has the cylinder, and cylinder and well accuse cabinet are electric connection, the expansion end fixed mounting of cylinder has the sliding plate, the outer wall fixed mounting of sliding plate has the movable block;
The bending assembly comprises a supporting frame and a construction plate, wherein the outer wall of the supporting frame is fixedly provided with a box body, the inner wall of the box body is provided with a pump body, the outer wall of the pump body is provided with a conveying pipe, the inner wall of the box body is fixedly provided with a baffle, the outer wall of one end of the box body, which is far away from the cutting knife, is provided with a discharge hole, and the top of the construction plate is fixedly provided with a parallel plate;
The outer wall of the parallel plate is provided with a sliding groove and a circular groove respectively, the upper end and the lower end of the parallel plate are provided with an electric telescopic cylinder I, the inner wall of the electric telescopic cylinder I is connected with one end of a telescopic rod I in a sliding mode, the other end of the telescopic rod I is fixedly provided with a sliding block, and the outer wall of the sliding block is provided with a roller assembly.
As a preferable technical scheme of the invention, a driving wheel is fixedly arranged on a power output shaft of the speed reducer, one end of a gear is meshed with the outer wall of the driving wheel, a driven wheel is meshed with the other end of the gear, rollers I and II are fixedly arranged at the tops of the driving wheel and the driven wheel, a vertical plate I is arranged at the bottom of the moving block, and an electromagnet and a cutting knife are electrically connected with a central control cabinet.
As a preferable technical scheme of the invention, one end of a bottom plate is fixedly arranged at the bottom of the first vertical plate, the second vertical plate is arranged at the other end of the bottom plate, a rotating motor is fixedly arranged at the bottom of the bottom plate, a threaded rod is fixedly arranged on a power output shaft of the rotating motor, an abutting block is connected with the outer wall of the threaded rod through threads, and a sliding rod is clamped on the inner wall of the bottom plate.
As a preferable technical scheme of the invention, the outer wall of the sliding rod is slidably connected with a limiting block, the inner wall of the first vertical plate is rotatably connected with a cylinder, the outer wall of the cylinder is fixedly provided with a driving wheel, one end of the abutting block, which is close to the cutting assembly, is provided with a bending wheel, the top of the ultrasonic detection instrument is fixedly provided with an alarm and an alarm lamp respectively, and the inner wall of the feeding frame is slidably connected with a steel plate.
As a preferable technical scheme of the invention, the roller assembly comprises a first round wheel, a second round wheel, a third round wheel, a first rotary wheel, a second rotary wheel, a third rotary wheel, a fourth rotary wheel and a fifth rotary wheel, wherein the outer walls of the first round wheel, the second round wheel and the third round wheel are fixedly arranged with the sliding block, the first round wheel, the second round wheel and the third round wheel slide on the inner wall of the sliding groove through the sliding block, the first rotary wheel, the second rotary wheel, the third rotary wheel, the fourth rotary wheel and the fifth rotary wheel are arranged on the inner wall of the circular groove, and the first rotary wheel, the second rotary wheel, the third rotary wheel, the fourth rotary wheel and the fifth rotary wheel are rotatably arranged on the inner wall of the circular groove.
As a preferable technical scheme of the invention, the cutting assembly comprises an electric hydraulic cylinder, a cutting block is fixedly assembled at the telescopic end of the electric hydraulic cylinder, a sliding plate is installed on the outer wall of the electric hydraulic cylinder, a bearing block is fixedly installed on the outer wall of the sliding plate, a second electric telescopic cylinder is fixedly installed on the inner wall of the sliding plate, a second telescopic rod is slidingly connected with the inner wall of the second electric telescopic cylinder, a long rod is fixedly assembled on the outer wall of the second telescopic rod, and the electric hydraulic cylinder and the second electric telescopic cylinder are electrically connected with a central control cabinet.
As a preferable technical scheme of the invention, a sliding rail is arranged on the outer wall of the long rod, a clamping block is connected to the inner wall of the sliding rail in a sliding manner, a double-head telescopic cylinder I is fixedly arranged on the outer wall of the clamping block, a triangular plate I and a triangular plate II are respectively connected to the telescopic ends on two sides of the double-head telescopic cylinder I in a rotating manner through a connecting piece I, a double-head telescopic cylinder II is fixedly arranged on the outer wall of the long rod, a bearing plate I and a bearing plate II are respectively connected to the telescopic ends on two sides of the double-head telescopic cylinder II in a rotating manner through a connecting piece II, and the heights of the bearing plate I and the bearing plate II are matched with the height of a bearing block.
As a preferable technical scheme of the invention, the first double-head telescopic cylinder and the second double-head telescopic cylinder are electrically connected with the central control cabinet, the first triangle plate and the second triangle plate rotate mutually, the first bearing plate and the second bearing plate rotate mutually, and the outer included angle of the first triangle plate and the second triangle plate is matched with the inner included angle between the first bearing plate and the second bearing plate.
The invention has the following beneficial effects:
1. This automatic bender is used in steel construction metal component production, start through electric hydraulic cylinder, can make the cutting piece can follow electric hydraulic cylinder's inner wall roll-off, and can make triangle-shaped's cutting is carried out to the steel sheet that set square one and set square two were placed to the piece outer wall of accepting, make the device can carry out triangle-tooth form's cutting to the outer wall of steel sheet when carrying out annular bending, thereby can make the steel sheet no longer be solitary annular after bending, more do benefit to the follow-up processing to it, and when need cut off the steel sheet, can make electric telescopic jar second start, make telescopic link second can make the stock move to the one end of keeping away from the piece of accepting, make the outer wall of cutting piece can accomplish the work of cutting to the outer wall of steel sheet, can make the device accomplish the work of cutting off and accomplish saw-tooth form's cutting to the outer wall of steel sheet, the function is comprehensive.
2. This automatic bender is used in steel construction metal component production is fixed through making round wheel three, rotor wheel one, rotor wheel two, rotor wheel four and rotor wheel five, can make the well accuse cabinet transmit signal this moment, make the electric telescopic cylinder at round wheel two tops first can begin work, thereby make telescopic link one drive round wheel slide downwards, the steel sheet can upwards bend this moment, after crooked, can make rotor wheel three motionless, round wheel one and round wheel two are fixed, can make the electric telescopic cylinder of round wheel three bottom first can start, and move round wheel three-way through telescopic link one, and then can make the steel sheet bend downwards, make the device can make the steel sheet be the wave bending, can bend the steel sheet when playing to the steel sheet, can be two at the same time, improve the holistic practicality of the device.
3. This automatic bender is used in steel construction metal component production can make ultrasonic detection instrument to begin the work through well accuse cabinet transmission signal to can make ultrasonic detection instrument carry out ultrasonic emission to the direction of steel sheet, make ultrasonic wave can detect the inside crackle of steel sheet, ultrasonic wave can reflect back when meetting the crackle simultaneously, and send out alarm and light scintillation through siren and warning light, then can judge existence and the position of crackle through received signal, simultaneously, the magnetic powder of box inner wall is sprayed by the conveyer pipe to the direction of steel sheet through the pump body, can spill the magnetic powder on the surface of steel sheet when the electro-magnet starts, the magnetic powder can gather and form visible lines in steel sheet crackle department, and then can make the device in time discover the crack that appears to the steel sheet bending in-process when the steel sheet bends, the bending efficiency of the device has been improved.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic diagram of another embodiment of the present invention;
FIG. 3 is a schematic diagram of the structure of the control cabinet of the present invention;
FIG. 4 is a schematic view of a roller according to the present invention;
FIG. 5 is a schematic view of a bending assembly according to the present invention;
FIG. 6 is a schematic view of a part of the structure of the bending assembly of the present invention;
FIG. 7 is a schematic diagram of a roller assembly according to the present invention;
FIG. 8 is a schematic view of the structure of an ultrasonic detecting instrument according to the present invention;
FIG. 9 is a schematic view of a bending wheel structure according to the present invention;
FIG. 10 is a schematic view of a receiving block according to the present invention;
FIG. 11 is a schematic view of a cutting assembly according to the present invention;
FIG. 12 is a schematic cross-sectional view of a cutting assembly according to the present invention.
1, A main body frame, 2, a central control cabinet, 3, a mounting plate, 4, a driving motor, 5, a speed reducer, 6, a bending assembly, 7, a top plate, 8, a cutting assembly, 9, a fixing seat, 10, a cylinder, 11, a sliding plate, 12, a moving block, 13, a fixing frame, 14, a driving wheel, 15, a gear, 16, a driven wheel, 17, a roller I, 18, a roller II, 19, an electromagnet, 20, a cutting knife, 21, a vertical plate I, 22, a bottom plate, 23, a rotating motor, 24, a threaded rod, 25, a sliding rod, 26, a limiting block, 27, an abutting block, 28, a cylinder, 29, a driving wheel, 30, a bending wheel, 31, a vertical plate II, 32, an ultrasonic detection instrument, 33, an alarm, 34, an alarm lamp, 35, a steel plate, 36 and a feeding frame;
601. The device comprises a support frame, a box body, 603, a pump body, 604, a conveying pipe, 605, a baffle, 606, a discharge hole, 607, a tool plate, 608, a parallel plate, 609, a chute, 610, an electric telescopic cylinder I, 611, a telescopic rod I, 612, a sliding block, 613 and a roller assembly;
6131. circle wheel one, circle wheel two, circle wheel three, 6134, rotation wheel one, 6135, rotation wheel two, 6136, rotation wheel three, 6137, rotation wheel four, 6138, rotation wheel five, 614 and circular groove;
801. The hydraulic device comprises an electric hydraulic cylinder 802, a cutting block 803, a sliding plate 804, a bearing block 805, an electric telescopic cylinder II, 806, a telescopic rod II, 807, a long rod 808, a sliding rail 809, a double-head telescopic cylinder I, 810, a connecting piece I, 811, a triangular plate I, 812, a triangular plate II, 813, a double-head telescopic cylinder II, 814, a connecting piece II, 815, a bearing plate I, 816, a bearing plate II, 817 and a clamping block.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-12, an automatic bending machine for producing a steel structure metal member comprises a main body frame 1, wherein a central control cabinet 2, a mounting plate 3, an electromagnet 19, a cutting knife 20 and an ultrasonic detection instrument 32 are respectively and fixedly installed on the outer wall of the main body frame 1, a driving motor 4 and a speed reducer 5 are respectively and fixedly assembled on the outer wall of the mounting plate 3, the driving motor 4 and the speed reducer 5 are electrically connected with the central control cabinet 2, a top plate 7 is clamped on the outer wall of the main body frame 1, a bending assembly 6 is arranged at the top of the top plate 7, a cutting assembly 8 is arranged on the outer wall of the main body frame 1, a fixing seat 9, a fixing frame 13 and a feeding frame 36 are respectively installed on the top of the top plate 7, a cylinder 10 is clamped on the inner wall of the fixing seat 9, the cylinder 10 is electrically connected with the central control cabinet 2, a sliding plate 11 is fixedly installed at the telescopic end of the cylinder 10, and a moving block 12 is fixedly installed on the outer wall of the sliding plate 11;
The bending assembly 6 comprises a supporting frame 601 and a construction plate 607, wherein the outer wall of the supporting frame 601 is fixedly provided with a box body 602, the inner wall of the box body 602 is provided with a pump body 603, the outer wall of the pump body 603 is provided with a conveying pipe 604, the inner wall of the box body 602 is fixedly provided with a baffle 605, the outer wall of one end of the box body 602 far away from the cutting knife 20 is provided with a discharge hole 606, and the top of the construction plate 607 is fixedly provided with a parallel plate 608;
The outer wall of the parallel plate 608 is respectively provided with a chute 609 and a circular groove 614, the upper end and the lower end of the parallel plate 608 are both provided with an electric telescopic cylinder I610, the inner wall of the electric telescopic cylinder I610 is in sliding connection with one end of a telescopic rod I611, the other end of the telescopic rod I611 is provided with a sliding block 612, and the outer wall of the sliding block 612 is provided with a roller component 613;
With the structure, the ultrasonic detection instrument 32 can start working by transmitting signals through the central control cabinet 2, so that the ultrasonic detection instrument 32 can transmit ultrasonic waves to the direction of the steel plate 35, the ultrasonic waves can detect cracks in the steel plate 35, meanwhile, the ultrasonic waves can be reflected back when encountering the cracks, and an alarm and light flicker are sent out through the alarm 33 and the alarm lamp 34, and then the existence and the position of the cracks can be judged through the received signals;
With the above structure, the pump body 603 can start working by transmitting signals through the central control cabinet 2, and then the pump body 603 can absorb the magnetic powder placed on the inner wall of the box 602 to the inner wall of the conveying pipe 604 and spray the magnetic powder to the outer wall of the steel plate 35 through the discharging hole 606, so that the magnetic powder can be used for laying the crack detection generated on the outer wall of the steel plate 35.
In a preferred embodiment, a driving wheel 14 is fixedly arranged on a power output shaft of the speed reducer 5, one end of a gear 15 is meshed with the outer wall of the driving wheel 14, a driven wheel 16 is meshed with the other end of the gear 15, a roller I17 is fixedly arranged at the tops of the driving wheel 14 and the driven wheel 16, a roller II 18 is arranged at the bottom of the moving block 12, a vertical plate I21 is arranged on the outer wall of the cutting assembly 8, and an electromagnet 19 and a cutting knife 20 are electrically connected with the central control cabinet 2;
with the structure, the limiting block 26 can limit the abutting block 27 in the sliding process through the arrangement of the sliding rod 25 and the limiting block 26.
In a preferred embodiment, one end of a bottom plate 22 is fixedly arranged at the bottom of a first vertical plate 21, a second vertical plate 31 is arranged at the other end of the bottom plate 22, a rotating motor 23 is fixedly arranged at the bottom of the bottom plate 22, a power output shaft of the rotating motor 23 is fixedly provided with a threaded rod 24, an outer wall of the threaded rod 24 is in threaded connection with an abutting block 27, and a sliding rod 25 is clamped on the inner wall of the bottom plate 22;
With the above structure, the signal is transmitted through the central control cabinet 2, so that the rotating motor 23 can start to work, the threaded rod 24 can rotate, the abutting block 27 can slide on the outer wall of the threaded rod 24, the bending wheel 30 can be driven to slide on the inner wall of the first vertical plate 21, the top of the bending wheel 30 can be contacted with the outer wall of the steel plate 35, and the bending angle of the steel plate 35 can be effectively controlled.
In a preferred embodiment, the outer wall of the sliding rod 25 is slidably connected with a limiting block 26, the inner wall of the first vertical plate 21 is rotatably connected with a cylinder 28, the outer wall of the cylinder 28 is fixedly provided with a driving wheel 29, one end, close to the cutting assembly 8, of the abutting block 27 is provided with a bending wheel 30, the top of the ultrasonic detection instrument 32 is fixedly provided with an alarm 33 and an alarm lamp 34 respectively, and the inner wall of the feeding frame 36 is slidably connected with a steel plate 35;
With the above structure, since the steel plate 35 is made of ferromagnetic material, the steel plate 35 can be attracted by the magnetic field, so that when the signal is generated from the central control cabinet 2, the electromagnet 19 can start to operate, and the powder can be collected at the crack of the outer wall of the steel plate 35, and a visible line can be formed.
In a preferred embodiment, the roller assembly 613 includes a first roller 6131, a second roller 6132, a third roller 6133, a first roller 6134, a second roller 6135, a third roller 6136, a fourth roller 6137 and a fifth roller 6138, wherein the outer walls of the first roller 6131, the second roller 6132 and the third roller 6133 are fixedly mounted with the sliding block 612, the first roller 6131, the second roller 6132 and the third roller 6133 slide on the inner wall of the sliding slot 609 through the sliding block 612, the first roller 6134, the second roller 6135, the third roller 6136, the fourth roller 6137 and the fifth roller 6138 are mounted on the inner wall of the circular slot 614, and the first roller 6134, the second roller 6135, the third roller 6136, the fourth roller 6137 and the fifth roller 6138 are rotatably mounted on the inner wall of the circular slot 614;
with the structure, the first round wheel 6133, the first rotary wheel 6134, the second rotary wheel 6135, the fourth rotary wheel 6137 and the fifth rotary wheel 6138 are fixed, at this time, the central control cabinet 2 can emit signals, so that the first electric telescopic cylinder 610 at the top of the second round wheel 6132 can start to work, the first telescopic rod 611 drives the second round wheel 6132 to slide downwards, at this time, the steel plate 35 can be bent upwards, after bending, the third rotary wheel 6136 can be fixed, the first round wheel 6131 and the second round wheel 6132 are fixed, the first electric telescopic cylinder 610 at the bottom of the third round wheel 6133 can be started, the first round wheel 6133 is driven to move upwards through the first telescopic rod 611, and the steel plate 35 can be bent downwards, so that the device can bend the steel plate 35 in a wavy manner.
In a preferred embodiment, the cutting assembly 8 comprises an electric hydraulic cylinder 801, a cutting block 802 is fixedly assembled at the telescopic end of the electric hydraulic cylinder 801, a sliding plate 803 is installed on the outer wall of the electric hydraulic cylinder 801, a bearing block 804 is fixedly installed on the outer wall of the sliding plate 803, a second electric telescopic cylinder 805 is fixedly installed on the inner wall of the sliding plate 803, a second telescopic rod 806 is slidingly connected to the inner wall of the second electric telescopic cylinder 805, a long rod 807 is fixedly assembled on the outer wall of the second telescopic rod 806, and the electric hydraulic cylinder 801 and the second electric telescopic cylinder 805 are electrically connected with the central control cabinet 2;
With the above structure, after the annular bending of the steel plate 35 is completed, the steel plate 35 needs to be cut at the overlapping position, and the central control cabinet 2 can transmit signals to enable the second electric telescopic cylinder 805 to start working, so that the second telescopic rod 806 can drive the long rod 807 to move towards the second electric telescopic cylinder 805, the outer wall of the cutting block 802 can be used for cutting the outer wall of the steel plate 35, and the cutting block 802 can be used for cutting the steel plate 35.
In a preferred embodiment, a sliding rail 808 is provided on the outer wall of the long rod 807, a clamping block 817 is slidingly connected to the inner wall of the sliding rail 808, a double-head telescopic cylinder I809 is fixedly arranged on the outer wall of the clamping block 817, a triangle plate I811 and a triangle plate II 812 are respectively and rotatably connected to the two telescopic ends of the double-head telescopic cylinder I809 through a connecting piece I810, a double-head telescopic cylinder II 813 is fixedly arranged on the outer wall of the long rod 807, a bearing plate I815 and a bearing plate II 816 are respectively and rotatably connected to the two telescopic ends of the double-head telescopic cylinder II 813 through a connecting piece II 814, and the heights of the bearing plate I815 and the bearing plate II 816 are matched with the height of the bearing block 804;
by utilizing the structure, the electric hydraulic cylinder 801 is started, the cutting block 802 can slide out from the inner wall of the electric hydraulic cylinder 801, and the triangular cutting can be carried out on the steel plate 35 placed on the outer wall of the bearing block 804 by the first triangular plate 811 and the second triangular plate 812, so that the device can carry out triangular tooth-shaped cutting on the outer wall of the steel plate 35 when annular bending is carried out, and the steel plate 35 is not in an independent annular shape after bending, thereby being more beneficial to subsequent processing.
In a preferred embodiment, the first double-ended telescopic cylinder 809 and the second double-ended telescopic cylinder 813 are electrically connected to the central control cabinet 2, the first triangle 811 and the second triangle 812 rotate mutually, the first receiving plate 815 and the second receiving plate 816 rotate mutually, and the outer included angle of the first triangle 811 and the second triangle 812 is matched with the inner included angle between the first receiving plate 815 and the second receiving plate 816;
By utilizing the structure, the first double-head telescopic cylinder 809 and the second double-head telescopic cylinder 813 can start to work by transmitting signals through the central control cabinet 2, so that the angles between the first triangular plate 811 and the second triangular plate 812 and between the first receiving plate 815 and the second receiving plate 816 can be changed, the triangular shape angle of the device can be changed, and meanwhile, the first triangular plate 811 and the second triangular plate 812 can be positioned on the inner wall of the first receiving plate 815 and the second receiving plate 816 during cutting, and the functionality of the device is improved.
The working principle is that when the device is used, the steel plate 35 is placed on the inner wall of the feeding frame 36, the driving motor 4 and the speed reducer 5 can start to work, the driving wheel 14 can drive the roller I17 to rotate, the driven wheel 16 is driven to rotate through the gear 15, the cylinder 10 is started in the process, the moving block 12 can drive the roller II 18 to slide to be in contact with the outer wall of the steel plate 35, the roller I17 and the roller II 18 can rotate oppositely to convey the steel plate 35, the round wheel III 6133, the rotating wheel I6134, the rotating wheel II 6135, the rotating wheel IV 6137 and the rotating wheel V6138 can be fixed when the bending assembly 6 is passed, at the moment, the central control cabinet 2 can transmit signals, the electric telescopic cylinder I610 at the top of the round wheel II 6132 can start to work, the telescopic rod I611 can drive the round wheel II 6132 to slide downwards, at the moment, the steel plate 35 can bend upwards, after bending, the rotating wheel three 6136 can be fixed, the round wheel one 6131 and the round wheel two 6132 can be fixed, the electric telescopic cylinder one 610 at the bottom of the round wheel three 6133 can be started, the round wheel three 6133 is driven to move upwards through the telescopic rod one 611, the steel plate 35 can be bent downwards, the device can bend the steel plate 35 in a wavy manner, the bent steel plate 35 is cut through the cutting knife 20, when the steel plate 35 is required to be bent in a ring shape, a signal can be emitted through the central control cabinet 2, the rotating motor 23 can start to work, the threaded rod 24 can rotate, the abutting block 27 can slide on the outer wall of the threaded rod 24, the bending wheel 30 can be driven to slide on the inner wall of the vertical plate one 21, the top of the bending wheel 30 can be contacted with the outer wall of the steel plate 35, therefore the bending angle of the steel plate 35 can be effectively controlled, the steel plate 35 can be bent in a ring shape, in the bending process, the first double-head telescopic cylinder 809 and the second double-head telescopic cylinder 813 can start to work, the angles between the first triangular plate 811 and the second triangular plate 812 and between the first receiving plate 815 and the second receiving plate 816 can be changed, the angles of the triangular shapes of the device cut can be changed, the first triangular plate 811 and the second triangular plate 812 can be positioned on the inner wall of the first receiving plate 815 and the second receiving plate 816 during cutting, the steel plate 35 can be sawed, after the steel plate 35 is bent in a ring shape, the overlapping position of the steel plate 35 needs to be cut, a signal can be transmitted through the central control cabinet 2, the second electric telescopic cylinder 805 can start to work, the second telescopic rod 806 can drive the long rod 807 to move towards the second electric telescopic cylinder 805, the outer wall of the cutting block 802 can cut the outer wall of the steel plate 35, the cutting block 802 can cut the steel plate 35, and the bending and cutting of the steel plate 35 can be completed.
It is noted that relational terms such as first and second, and the like are 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. Moreover, 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.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.