CN111805102B - Method for automatically shifting exchange workbench applied to laser cutting machine - Google Patents
Method for automatically shifting exchange workbench applied to laser cutting machine Download PDFInfo
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- CN111805102B CN111805102B CN202010559108.XA CN202010559108A CN111805102B CN 111805102 B CN111805102 B CN 111805102B CN 202010559108 A CN202010559108 A CN 202010559108A CN 111805102 B CN111805102 B CN 111805102B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
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Abstract
The invention discloses a method for automatically shifting a change table on a laser cutting machine, which adopts a gravity sensor to perform gravity sensing on plates on an upper layer working table and a lower layer working table, automatically calculates the weight of the upper layer working table/the lower layer working table and the loaded plate through the compression amount compressed by a pressure switch in the gravity sensor, and automatically matches with a relation parameter in a preset shifting program through a plate weight signal fed back from the force sensor to select the driving speed of a servo motor, so that a transmission mechanism adjusts the transportation speed of the upper layer working table and the lower layer working table according to the plates with different weights; the automatic gear shifting method of the exchange workbench greatly improves the positioning precision of the exchange workbench; the cutting machine program automatically matches corresponding exchange speed according to the plates with different weights, so that the exchange efficiency during the cutting of the thin plate is improved, and the safety of the exchange workbench during the cutting of the thick plate is improved.
Description
Technical Field
The invention relates to the technical field of laser processing equipment, in particular to a method for automatically shifting a switching workbench applied to a laser cutting machine.
Background
The laser cutting has the advantages of smooth cutting surface, high cutting efficiency, high cutting precision and the like, so the laser cutting machine is widely applied, along with the development of manufacturing industry, the cutting efficiency of the laser cutting machine determines whether the productivity is high, the exchange workbench is used as an auxiliary mechanism of the laser cutting machine, the main function is to reduce the waiting time for material changing, thereby the efficiency of the laser cutting machine is improved, the current exchange workbench generally adopts a transmission device to drive the two workbenches, so that the two workbenches synchronously act in opposite directions all the time, when the exchange workbench needs to be maintained or breaks down, the two workbenches are moved to one end of a lathe bed for maintenance or repair after the connecting structure of the two workbenches and the transmission device needs to be disassembled, and the maintenance or repair is inconvenient. In current plane laser cutting machine simultaneously, the change table adopts alternating current motor to carry out the change work of upper and lower floor's workstation mostly, has following problem: the positioning precision is poor, the speed is slow, and the speed of the workbench cannot be automatically adjusted according to plates with different weights. Therefore, how to ensure that when the workbench is exchanged, the thin (light) plate can be exchanged quickly to improve the efficiency, and when the thick (heavy) plate is exchanged, the speed is properly reduced to improve the installation performance is a problem which needs to be solved urgently by the laser cutting machine at present.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a method for automatically shifting a swap table applied to a laser cutting machine, which achieves high positioning accuracy, and can automatically match the operating speeds of an upper stage and a lower stage according to different weight of a plate, thereby improving the efficiency of operation and processing and improving the productivity.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for automatically shifting a change table applied to a laser cutting machine comprises the steps that the change table comprises a machine body, an upper layer work table, a lower layer work table and a transmission mechanism, wherein the machine body comprises a work area and a feeding area, the upper layer work table and the lower layer work table are arranged on the machine body, and the upper layer work table is positioned above the lower layer work table; the laser cutting machine further comprises a gravity sensing device, the gravity sensing device is installed at the junction of the working area and the feeding area of the machine body, the transmission mechanism comprises a servo motor, the bottom of the upper working table or the bottom of the lower working table is provided with a flat wheel of the working table which can roll or slide on the machine body, and the automatic gear shifting of the exchange working table comprises the following steps:
s1, the transmission mechanism adopts a servo motor to control the upper-layer workbench and the lower-layer workbench to do alternate reciprocating motion on the bed body; when the upper layer workbench or the lower layer workbench enters the workbench from the feeding area, the workbench flat wheel passes through the gravity sensing device and contacts with the gravity sensing device, the gravity sensing device is provided with a force sensor, when the bottom of the workbench flat wheel is pressed on a pressure switch on the force sensor, the pressure switch is pressed downwards to be compressed back into the force sensor, and the compressed amount compressed back by the pressure switch automatically calculates the weight of the upper layer workbench/the lower layer workbench and the loaded plate;
s2, presetting a gear shifting program which is associated with the weight of the plate and the driving speed of the servo motor in a cutting machine program, wherein the gear shifting program comprises a relation parameter between the weight of the plate and the driving speed of the servo motor, the weight of the plate is inversely proportional to the driving speed of the servo motor, when the weight of the plate is large, the driving speed of the servo motor becomes slow, and when the weight of the plate is small, the driving speed of the servo motor becomes fast;
s3, automatically matching plate weight signals fed back from the force sensor with relation parameters in a preset gear shifting program to select the driving speed of the servo motor, so that the transmission mechanism adjusts the conveying speed of the upper-layer workbench and the lower-layer workbench according to plates with different weights;
s4, when the transmission mechanism drives the upper layer workbench or the lower layer workbench to move from the feeding area to the working area and to pass through a junction, the servo motor performs signal data interaction through a gear shifting program in a PLC program and a cutting machine program, a plate weight signal in the gear shifting program is converted into a servo motor driving speed signal and then transmitted to the PLC program, and the PLC program controls the servo motor to change the rotating speed of the servo motor according to the servo motor driving speed signal, so that the speed of the servo motor driving the upper layer workbench or the lower layer workbench to transport is changed.
Preferably, the transmission mechanism is arranged at the junction of the working area and the feeding area, or the transmission mechanism is arranged at one end of the lathe bed, namely at one end of the working area far away from the feeding area.
More preferably, the transmission mechanism is arranged at one end of the working area far away from the feeding area.
Preferably, the bed body is provided with an upper layer supporting structure for bearing the operation of an upper layer workbench and a lower layer supporting structure for bearing the operation of a lower layer workbench. The upper layer supporting structure and the lower layer supporting structure respectively comprise a sliding rail matched with the flat wheel of the workbench.
Preferably, the gravity sensing device is arranged on one side of the lathe bed.
Preferably, the gravity sensing device comprises a left gravity sensing device arranged on one side of the lathe bed and a right gravity sensing device arranged on the other side of the lathe bed, and the left gravity sensing device and the right gravity sensing device are located on the same height and the same width direction of the lathe bed. The accuracy and the stability of the weight measurement of the plate by the gravity sensing device are guaranteed by the arrangement.
Preferably, the gravity sensing device is provided with an upper layer force sensor and a lower layer force sensor along the height direction, and the upper layer force sensor is arranged below a workbench flat wheel of the upper layer workbench, so that the workbench flat wheel of the upper layer workbench can pass through and press the upper layer force sensor; the lower-layer force sensor is arranged below a workbench flat wheel of the lower-layer workbench, so that the workbench flat wheel of the lower-layer workbench can pass through and press the lower-layer force sensor.
Preferably, the upper layer force sensor and the slide rail of the upper layer supporting structure are located at the same height and located on the slide rail of the upper layer supporting structure at the junction of the working area and the feeding area, and the lower layer force sensor and the slide rail of the lower layer supporting structure are located at the same height and located on the slide rail of the lower layer supporting structure at the junction of the working area and the feeding area.
Preferably, an inductive switch is arranged at the junction of the working area and the feeding area, the inductive switch comprises an upper inductive switch and a lower inductive switch, the upper inductive switch and the lower inductive switch are arranged at the same side of the gravity sensing device, the gravity sensing device is closer to the working area than the inductive switch, and the upper layer workbench/the lower layer workbench sequentially passes through the inductive switch and the gravity sensing device from the feeding area and enters the working area;
and an upper layer induction sheet is arranged at the position close to the head end of the upper layer workbench and a lower layer induction sheet is arranged at the position close to the head end of the lower layer workbench along the direction from the feeding area to the working area.
Preferably, during one reciprocating motion of the upper layer worktable: when the upper-layer worktable moves from the feeding area to the working area to the junction of the feeding area and the working area, an upper-layer sensing piece of the upper-layer worktable senses an upper sensing switch, the upper-layer force sensor starts to work, and when the upper-layer sensing piece senses the upper sensing switch in the process that the transmission mechanism conveys the upper-layer worktable from the working area to the feeding area, the upper-layer force sensor is closed and does not perform data acquisition work;
in the process of one reciprocating motion of the lower workbench: when the lower layer workbench moves from the feeding area to the working area to the joint of the feeding area and the working area, the lower layer sensing piece of the lower layer workbench senses the lower layer sensing switch, and the lower layer force sensor starts to work; when the transmission mechanism conveys the lower-layer workbench to the feeding area from the working area, and the lower-layer sensing piece senses the lower-layer sensing switch, the lower-layer force sensor is closed and does not perform data acquisition.
When the upper layer worktable continues to move past the upper layer force sensor, the upper layer force sensor collects the weight information of the plate on the upper layer worktable, and when the upper layer worktable passes the upper layer force sensor, the upper layer force sensor stops working; when the plate on the upper layer worktable is processed in the working area, the transmission mechanism conveys the upper layer worktable from the working area to the feeding area, and when an upper layer sensing piece senses the upper layer sensing switch, the upper layer force sensor is turned off and does not perform data acquisition work, and when the upper layer worktable performs one reciprocating motion next time, and moves from the feeding area to the working area to the junction of the upper layer sensing piece and the upper layer sensing switch, the upper layer sensing piece of the upper layer worktable senses the upper layer force sensor, and the upper layer force sensor starts to work; the data acquisition process of the lower layer force sensor is consistent with that of the upper layer force sensor. The purpose that sets up like this is in order to guarantee that upper workstation and lower floor's workstation just can measure the quantity of panel when only getting into the workspace from the material loading district, weigh to unprocessed panel promptly, when panel transports in the workspace, and get into the material loading district time gravity induction system does not work from the workspace, can prevent like this that panel weight from changing after the course of working and processing are accomplished, thereby avoid gravity induction system to gather frequent acquisition data and frequently control servo motor and shift the variable speed, thereby the frequent problem of transport speed change appears in the messenger's panel transportation.
Preferably, drive mechanism includes servo motor, conveying chain, drive gear, initiative traction wheel, and passive traction piece, servo motor sets up the one end of lathe bed, conveying chain sets up the inboard of lathe bed one side, conveying chain includes: the upper straight line section drives the upper layer workbench to run on the lathe bed, and the lower straight line section drives the lower layer workbench to run on the lathe bed; the servo motor is connected with the conveying chain through a transmission gear, the driving traction wheel comprises an upper traction wheel connected with the upper straight line section and a lower traction wheel connected with the lower straight line section, one end of the upper layer workbench/the lower layer workbench is connected with the driven traction block, and the driving traction wheel is connected with the driven traction block; the upper traction wheel and the lower traction wheel are respectively arranged at two ends of the conveying chain. The transmission mechanism drives the upper layer workbench and the lower layer workbench to move simultaneously, and when the transmission mechanism drives the upper layer workbench to enter the working area, the lower layer workbench begins to leave the working area and moves towards the feeding area.
Preferably, along the direction of material loading district to workspace, the head end of upper workstation with go up the traction wheel and pass through passive traction block and connect, along the direction of material loading district to workspace, the head end of lower floor's workstation with go up the traction wheel and pass through passive traction block and connect.
Preferably, the transmission mechanism comprises a first transmission mechanism and a second transmission mechanism, the first transmission mechanism is connected with the upper layer workbench, the first transmission mechanism drives the upper layer workbench to reciprocate along the length direction of the lathe bed, the second transmission mechanism is connected with the lower layer workbench, and the second transmission mechanism drives the lower layer workbench to reciprocate along the length direction of the lathe bed;
the first transmission mechanism comprises a first servo motor, a first transmission chain, a first driving traction wheel, a transmission gear and a first passive traction block, the first servo motor is arranged at one end of the lathe bed, the first transmission chain is arranged on the inner side of one side of the lathe bed, the first servo motor is connected with the first transmission chain through the transmission gear, the first driving traction wheel is connected with the first transmission chain, the first passive traction block is connected with one end of the upper workbench, and the first driving traction wheel is connected with the first passive traction block;
the second transmission mechanism comprises a second servo motor, a second transmission chain, a second driving traction wheel, a transmission gear and a second driven traction block, the second servo motor is arranged at one end of the lathe bed, the second transmission chain is arranged on the inner side of the other side of the lathe bed, the second servo motor is connected with the second transmission chain through the transmission gear, the second driving traction wheel is connected with the second transmission chain, the second driven traction block is connected with one end of the lower-layer workbench, and the second driving traction wheel is connected with the second driven traction block.
Preferably, a first infrared sensing device and a second infrared sensing device are arranged on the lathe bed at the junction of the working area and the feeding area, the first infrared sensing device is arranged corresponding to the upper workbench, namely the height of the first infrared sensing device is flush with that of the upper workbench, and the second infrared sensing device is arranged corresponding to the lower workbench, namely the height of the second infrared sensing device is flush with that of the lower workbench; the first infrared sensing device detects the movement position of the upper workbench, when the upper workbench moves to a designated position, the first infrared sensing device transmits a signal to stop the work of the first servo motor, the second infrared sensing device detects the movement position of the lower workbench, and when the lower workbench moves to the designated position, the second infrared sensing device transmits a signal to stop the work of the second servo motor.
Preferably, drive mechanism still includes the speed reducer, drive gear includes driving gear and driven gear, the speed reducer is connected to servo motor's output, transmits output torque to through servo motor on the speed reducer, the driving gear is through tight cover and speed reducer output shaft that expand, servo motor with output torque final transmission to the driving gear on, the driving gear with driven gear assembles respectively at the both ends inboard of conveying chain, the driving gear with tooth and conveying chain on the driven gear cooperate and are connected to drive conveying chain operation when making the driving gear pivoted.
Preferably, the root of the driving traction wheel is embedded in the chain, and the traction wheel body is wedged in the groove of the traction block. When the servo motor rotates, the output torque is transmitted to the driving gear through the speed reducer, and when the driving gear drives the chain link on the transmission chain to move back and forth, the driving traction wheel embedded in the transmission chain drives the upper layer workbench/the lower layer workbench to horizontally move back and forth.
Preferably, the exchange workbench further comprises a first limiting block and a second limiting block, the first limiting block and the second limiting block are respectively arranged on two sides of one end of the lathe bed, the first limiting block corresponds to the upper workbench, and the second limiting block corresponds to the lower workbench.
Preferably, the first limiting block faces one side of the upper-layer workbench is provided with a first buffering rubber block, and the second limiting block faces one side of the lower-layer workbench is provided with a second buffering rubber block.
Compared with the prior art, the invention has the beneficial technical effects that:
according to the method for automatically shifting the exchange workbench on the laser cutting machine, the gravity sensing device is adopted to perform gravity sensing on plates on an upper workbench and a lower workbench, the weight of the upper workbench/the lower workbench and the loaded plate is automatically calculated through the compression amount compressed by the pressure switch in the gravity sensing device, and the driving speed of the servo motor is selected through the automatic matching of a plate weight signal fed back from the force sensor and a relation parameter in a preset shifting program, so that the transmission mechanism adjusts the transportation speed of the upper workbench and the lower workbench according to the plates with different weights; the automatic gear shifting method of the exchange workbench greatly improves the positioning precision of the exchange workbench; the cutting machine program automatically matches corresponding exchange speed according to plates with different weights, and signal data interaction is performed through the PLC program and the cutting program to achieve the function of automatically adjusting the speed of the workbench, so that the exchange efficiency during cutting of thin plates is improved, and the safety of the workbench during cutting of thick plates is improved.
Simultaneously through first drive mechanism reaches second drive mechanism drives respectively the upper workstation reaches lower floor's workstation work, promptly the upper workstation with realize the autonomous working between the workstation of lower floor, when double-deck change table need detect the maintenance or when breaking down, can with the upper workstation reaches the workstation of lower floor moves simultaneously extremely the one end of lathe bed, the maintenance and the maintenance of the equipment of being convenient for have shortened the time of maintenance and maintenance to productivity gain. The upper-layer workbench and the lower-layer workbench are respectively driven by the first transmission mechanism and the second transmission mechanism, and only one transmission device is adopted to drive the two workbenches relatively at present, so that the driving force of the upper-layer workbench and the lower-layer workbench is improved, the operation of the double-layer exchange workbench is efficient, and the productivity is further improved.
Drawings
FIG. 1 is a schematic axial view of example 1 of the present invention;
FIG. 2 is a partially enlarged schematic view of a transmission mechanism according to embodiment 1 of the present invention;
FIG. 3 is a front view of embodiment 1 of the present invention;
FIG. 4 is a schematic view of the structure of FIG. 3 in the direction D-D;
FIG. 5 is a top view of embodiment 1 of the present invention;
fig. 6 is a partial structural view of a gravity sensing apparatus according to embodiment 1 of the present invention;
FIG. 7 is a schematic axial view of embodiment 4 of the present invention.
Reference numerals:
100. a bed body; 101. a working area; 102. a feeding area; 200. an upper stage; 300. a lower stage; 40. a transmission mechanism; 400. a first transmission mechanism; 401. a servo motor; 402. a speed reducer; 403. a driving gear; 404. a conveyor chain; 405. a driving traction wheel; 406. a passive traction block; 500. a second transmission mechanism; 600. a worktable flat wheel; 700. a gravity sensing device; 701. an upper layer force sensor; 702. a lower layer force sensor; 800. a slide rail.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments, but the scope of the present invention is not limited to the following embodiments.
Referring to fig. 1 and 2, the embodiment discloses a method for automatically shifting a change table applied to a laser cutting machine, the change table includes a bed 100, an upper table 200, a lower table 300, and a transmission mechanism 40, the bed 100 includes a working area 101 and a loading area 102, the upper table 200 and the lower table 300 are both disposed on the bed 100, and the upper table 200 is located above the lower table 300; the laser cutting machine further comprises a gravity sensing device, wherein the gravity sensing device is arranged at the junction of the working area 101 and the feeding area 102 of the machine body 100, and the gravity sensing device 700 is arranged on one side of the machine body 100. The transmission mechanism 40 includes a servo motor 401, and a table flat wheel 600 capable of rolling or sliding on the bed 100 is disposed at the bottom of the upper stage 200 or the lower stage 300.
The transmission mechanism 40 is disposed at a position of a junction between the working area 101 and the feeding area 102, or the transmission mechanism 40 is disposed at one end of the bed 100, that is, at one end of the working area 101 away from the feeding area 102. Preferably, in this embodiment, the transmission mechanism 40 is disposed at an end of the working area 101 away from the loading area 102.
The lathe bed 100 is provided with an upper layer supporting structure for bearing the operation of the upper layer workbench 200 and a lower layer supporting structure for bearing the operation of the lower layer workbench 300. The upper layer supporting structure and the lower layer supporting structure both comprise a sliding rail 800 matched with the workbench flat wheel 600.
As shown in fig. 2, the transmission mechanism 40 includes a servo motor 401, a transmission chain 404, a transmission gear, an active traction wheel 405, and a passive traction block 406, the servo motor 401 is disposed at one end of the bed 100, the transmission chain 404 is disposed at an inner side of one side of the bed 100, and the transmission chain 404 includes: an upper straight line segment driving the upper layer worktable 200 to run on the lathe bed 100, and a lower straight line segment driving the lower layer worktable 300 to run on the lathe bed 100; the servo motor 401 is connected with the transmission chain 404 through a transmission gear, the driving traction wheel 405 comprises an upper traction wheel connected with the upper straight line section and a lower traction wheel connected with the lower straight line section, one end of the upper layer workbench 200/the lower layer workbench 300 is connected with the driven traction block 406, and the driving traction wheel 405 is connected with the driven traction block 406; the upper traction wheel and the lower traction wheel are respectively arranged at two ends of the conveying chain 404. The transmission mechanism 40 drives the upper layer workbench 200 and the lower layer workbench 300 to move simultaneously, and when the transmission mechanism 40 drives the upper layer workbench 200 to enter the working area 101, the lower layer workbench 300 starts to leave the working area 101 to move towards the feeding area 102.
The head end of the upper workbench 200 is connected with the upper traction wheel through a passive traction block 406 along the direction from the feeding area 102 to the working area 101, and the head end of the lower workbench 300 is connected with the upper traction wheel through a passive traction block 406 along the direction from the feeding area 102 to the working area 101. The root of the driving traction wheel 405 is embedded in the chain, and the body of the driving traction wheel 405 is wedged in the groove of the traction block. When the servo motor 401 rotates, the output torque is transmitted to the driving gear 403, and the driving gear 403 drives the chain link of the transmission chain 404 to move forward and backward, so that the driving traction wheel 405 embedded in the traction block drives the upper stage 200/the lower stage 300 to move horizontally forward and backward.
As shown in fig. 3-6, the swap table automatic shift includes the steps of:
s1, the transmission mechanism 40 adopts a servo motor 401 to control the upper layer worktable 200 and the lower layer worktable 300 to do alternate reciprocating motion on the lathe bed 100; when the upper workbench 200 or the lower workbench 300 enters the working area 101 from the feeding area 102, the workbench flat wheel 600 passes over and contacts with the gravity sensing device 700, a force sensor is arranged on the gravity sensing device 700, when the bottom of the workbench flat wheel 600 presses on a pressure switch on the force sensor, the pressure switch is pressed downwards to be compressed back into the force sensor, and the compressed amount compressed back by the pressure switch is automatically used for calculating the weight of the upper workbench 200/the lower workbench 300 and the loaded plate;
s2, presetting a gear shifting program which relates the weight of the plate and the driving speed of the servo motor 401 in a cutter program, wherein the gear shifting program comprises a relation parameter between the weight of the plate and the driving speed of the servo motor 401, the weight of the plate is inversely proportional to the driving speed of the servo motor 401, when the weight of the plate is large, the driving speed of the servo motor 401 is reduced, and when the weight of the plate is small, the driving speed of the servo motor 401 is increased;
s3, automatically matching plate weight signals fed back from the force sensor with relation parameters in a preset gear shifting program to select the driving speed of the servo motor 401, so that the transmission mechanism 40 adjusts the conveying speed of the upper-layer workbench 200 and the lower-layer workbench 300 according to plates with different weights;
s4, when the transmission mechanism 40 drives the upper layer workbench 200 or the lower layer workbench 300 to move from the feeding area 102 to the working area 101 and pass through a junction, the servo motor 401 conducts signal data interaction through a PLC program and a gear shifting program in a cutting machine program, a plate weight signal in the gear shifting program is converted into a servo motor 401 driving speed signal and then transmitted to the PLC program, the PLC program controls the servo motor 401 to change the rotating speed of the servo motor 401 according to the servo motor 401 driving speed signal, and therefore the speed of the servo motor 401 driving the upper layer workbench 200 or the lower layer workbench 300 to transport is changed.
As shown in fig. 4 and 6, an upper layer force sensor 701 and a lower layer force sensor 702 are disposed on the gravity sensing device 700 along the height direction, and the upper layer force sensor 701 is disposed below the table wheel 600 of the upper layer table, so that the table wheel 600 of the upper layer table can pass and press the upper layer force sensor 701; the lower layer force sensor 702 is disposed below the table flat wheel 600 of the lower layer table, so that the table flat wheel 600 of the lower layer table can pass through and press the lower layer force sensor 702.
As shown in fig. 4, the upper layer force sensor 701 is located at the same height as the slide rail 800 of the upper layer supporting structure, and is located on the slide rail 800 of the upper layer supporting structure at the junction of the working area 101 and the loading area 102, and the lower layer force sensor 702 is located at the same height as the slide rail 800 of the lower layer supporting structure at the junction of the working area 101 and the loading area 102, and is located on the slide rail 800 of the lower layer supporting structure at the junction of the working area 101 and the loading area 102.
Arranging an inductive switch at the junction of the working area 101 and the feeding area 102, wherein the inductive switch comprises an upper inductive switch and a lower inductive switch, the upper inductive switch and the lower inductive switch are arranged at the same side of the gravity sensing device 700, the gravity sensing device 700 is closer to the working area 101 than the inductive switch, and the upper layer workbench 200/the lower layer workbench sequentially enters the working area 101 from the feeding area 102 through the inductive switch and the gravity sensing device 700;
along the direction from the loading area 102 to the working area 101, an upper layer sensing piece is arranged at a position close to the head end of the upper layer workbench 200, and a lower layer sensing piece is arranged at a position close to the head end of the lower layer workbench 300.
In the process of performing one reciprocating motion on the upper stage 200: when the upper layer worktable 200 moves from the feeding area 102 to the working area 101 to the junction of the feeding area and the working area, an upper layer sensing piece of the upper layer worktable 200 senses with an upper sensing switch, the upper layer force sensor 701 starts to work, and when the transmission mechanism 40 conveys the upper layer worktable 200 from the working area 101 to the feeding area 102 and the upper layer sensing piece senses with the upper sensing switch, the upper layer force sensor 701 is closed and does not perform data acquisition work;
in the course of one reciprocating motion of the lower stage 300: when the lower workbench 300 moves from the feeding area 102 to the working area 101 to the junction of the feeding area and the working area, the lower sensing piece of the lower workbench 300 senses the lower sensing switch, and the lower force sensor 702 starts to work; when the lower sensing piece senses the lower sensing switch during the process that the transmission mechanism 40 conveys the lower workbench 300 from the working area 101 to the feeding area 102, the lower force sensor 702 is turned off and does not perform data acquisition.
When the upper layer worktable 200 continues to move to pass through the upper layer force sensor 701, the upper layer force sensor 701 acquires the plate weight information on the upper layer worktable 200, and after the upper layer worktable 200 passes through the upper layer force sensor 701, the upper layer force sensor 701 stops working; after the plate on the upper layer worktable 200 is processed in the working area 101, the transmission mechanism 40 turns off the upper layer force sensor 701 to not perform data acquisition work when the upper layer sensing piece is sensed by the upper layer sensing switch in the process of conveying the upper layer worktable 200 from the working area 101 to the feeding area 102, and the upper layer sensing piece of the upper layer worktable 200 is sensed by the upper layer sensing switch and starts to work when the upper layer worktable 200 moves from the feeding area 102 to the working area 101 to the junction of the upper layer sensing piece and the upper layer sensing switch in the next reciprocating motion process of the upper layer worktable 200; the data acquisition process of the lower layer force sensor 702 is consistent with that of the upper layer force sensor 701.
Example 2
Only differences from the above embodiment are described in this embodiment, other technical features are the same as those of the above embodiment, in this embodiment, the transmission mechanism 40 further includes a speed reducer 402, the transmission gear includes a driving gear 403 and a driven gear, an output end of the servo motor 401 is connected to the speed reducer 402, the servo motor 401 transmits output torque to the speed reducer 402, the driving gear 403 is connected to an output shaft of the speed reducer 402 through an expansion sleeve, the servo motor 401 finally transmits the output torque to the driving gear 403, the driving gear 403 and the driven gear are respectively assembled on inner sides of two ends of the transmission chain 404, and teeth on the driving gear 403 and the driven gear are connected with the transmission chain 404 in a matching manner, so that the driving gear rotates and drives the transmission chain 404 to operate.
The root of the driving traction wheel 405 is embedded in the chain, and the body of the driving traction wheel 405 is wedged in the groove of the traction block. When the servo motor 401 rotates, the output torque is transmitted to the driving gear 403 through the speed reducer 402, and the driving gear 403 drives the chain link of the transmission chain 404 to move back and forth, the driving traction wheel 405 embedded in the transmission chain 404 drives the upper stage 200/the lower stage 300 to move horizontally back and forth.
Example 3
In this embodiment, only differences from the above embodiment are described, and other technical features are the same as those of the above embodiment, in this embodiment, the swap table further includes a first limiting block and a second limiting block, the first limiting block and the second limiting block are respectively disposed on two sides of one end of the bed 100, the first limiting block is disposed corresponding to the upper stage 200, and the second limiting block is disposed corresponding to the lower stage 300.
The first limiting block faces one side of the upper-layer workbench 200 is provided with a first buffering rubber block, and the second limiting block faces one side of the lower-layer workbench 300 is provided with a second buffering rubber block.
Example 4
Only differences from the above embodiment are described in this embodiment, and other technical features are the same as those of the above embodiment, in this embodiment, as shown in fig. 7, the transmission mechanism 40 includes a first transmission mechanism 400 and a second transmission mechanism 500, both of which include a transmission chain, the first transmission mechanism 400 is connected to the upper stage 200, the first transmission mechanism 400 drives the upper stage 200 to reciprocate along the length direction of the bed 100, the second transmission mechanism 500 is connected to the lower stage 300, and the second transmission mechanism 500 drives the lower stage 300 to reciprocate along the length direction of the bed 100;
the first transmission mechanism 400 comprises a first servo motor, a first transmission chain, a first driving traction wheel, a transmission gear and a first driven traction block, wherein the first servo motor is arranged at one end of the lathe bed 100, the first transmission chain is arranged on the inner side of one side of the lathe bed 100, the first servo motor is connected with the first transmission chain through the transmission gear, the first driving traction wheel is connected with the first transmission chain, the first driven traction block is connected with one end of the upper workbench 200, and the first driving traction wheel is connected with the first driven traction block;
the second transmission mechanism 500 comprises a second servo motor, a second transmission chain, a second driving traction wheel, a transmission gear and a second driven traction block, the second servo motor is arranged at one end of the lathe bed 100, the second transmission chain is arranged on the inner side of the other side of the lathe bed 100, the second servo motor is connected with the second transmission chain through the transmission gear, the second driving traction wheel is connected with the second transmission chain, the second driven traction block is connected with one end of the lower-layer workbench 300, and the second driving traction wheel is connected with the second driven traction block.
A first infrared sensing device and a second infrared sensing device are arranged on the lathe bed 100 at the junction of the working area 101 and the feeding area 102, the first infrared sensing device is arranged corresponding to the upper workbench 200, namely the height of the first infrared sensing device is flush with that of the upper workbench 200, and the second infrared sensing device is arranged corresponding to the lower workbench 300, namely the height of the second infrared sensing device is flush with that of the lower workbench 300; the first infrared sensing device detects a movement position of the upper stage work table 200, when the upper stage work table 200 moves to a designated position, the first infrared sensing device transmits a signal to stop the operation of the first servo motor, the second infrared sensing device detects a movement position of the lower stage work table 300, and when the lower stage work table 300 moves to a designated position, the second infrared sensing device transmits a signal to stop the operation of the second servo motor.
Example 5
Only differences from the above embodiment are described in this embodiment, and other technical features are the same as those of the above embodiment, in this embodiment, the gravity sensing device 700 includes a left gravity sensing device disposed on one side of the bed 100 and a right gravity sensing device disposed on the other side of the bed 100, and the left gravity sensing device and the right gravity sensing device are located at the same height and in the same width direction of the bed 100. The accuracy and the stability of the weight measurement of the plate by the gravity sensing device are guaranteed by the arrangement.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. A method for automatically shifting a change table applied to a laser cutting machine comprises the steps that the change table comprises a machine body, an upper layer work table, a lower layer work table and a transmission mechanism, wherein the machine body comprises a work area and a feeding area, the upper layer work table and the lower layer work table are arranged on the machine body, and the upper layer work table is positioned above the lower layer work table; the laser cutting machine is characterized in that the laser cutting machine further comprises a gravity sensing device, the gravity sensing device is installed at the junction of the working area and the feeding area of the machine body, the transmission mechanism comprises a servo motor, the bottom of the upper working table or the bottom of the lower working table can be provided with a flat wheel of the working table which rolls or slides on the machine body, and the automatic gear shifting of the exchange working table comprises the following steps:
s1, the transmission mechanism adopts a servo motor to control the upper-layer workbench and the lower-layer workbench to do alternate reciprocating motion on the bed body; when the upper layer workbench or the lower layer workbench enters the workbench from the feeding area, the workbench flat wheel passes through the gravity sensing device and contacts with the gravity sensing device, the gravity sensing device is provided with a force sensor, when the bottom of the workbench flat wheel is pressed on a pressure switch on the force sensor, the pressure switch is pressed downwards to be compressed back into the force sensor, and the compressed amount compressed back by the pressure switch automatically calculates the weight of the upper layer workbench/the lower layer workbench and the loaded plate;
s2, presetting a gear shifting program which is associated with the weight of the plate and the driving speed of the servo motor in a cutting machine program, wherein the gear shifting program comprises a relation parameter between the weight of the plate and the driving speed of the servo motor, the weight of the plate is inversely proportional to the driving speed of the servo motor, when the weight of the plate is large, the driving speed of the servo motor becomes slow, and when the weight of the plate is small, the driving speed of the servo motor becomes fast;
s3, automatically matching plate weight signals fed back from the force sensor with relation parameters in a preset gear shifting program to select the driving speed of the servo motor, so that the transmission mechanism adjusts the conveying speed of the upper-layer workbench and the lower-layer workbench according to plates with different weights;
s4, when the transmission mechanism drives the upper layer workbench or the lower layer workbench to move from the feeding area to the working area and to pass through a junction, the servo motor performs signal data interaction through a gear shifting program in a PLC program and a cutting machine program, a plate weight signal in the gear shifting program is converted into a servo motor driving speed signal and then transmitted to the PLC program, and the PLC program controls the servo motor to change the rotating speed of the servo motor according to the servo motor driving speed signal, so that the speed of the servo motor driving the upper layer workbench or the lower layer workbench to transport is changed.
2. The method for automatically shifting the exchange workbench applied to the laser cutting machine as claimed in claim 1, wherein the transmission mechanism is arranged at the junction of the working area and the loading area, or the transmission mechanism is arranged at one end of the machine bed, namely at one end far away from the loading area in the working area.
3. The method for automatically shifting the exchange workbench applied to the laser cutting machine as claimed in claim 1, wherein the gravity sensing device is arranged at one side of the machine body.
4. The method for automatically shifting the exchange workbench applied to the laser cutting machine as claimed in claim 1, wherein the gravity sensing device comprises a left gravity sensing device disposed on one side of the machine body and a right gravity sensing device disposed on the other side of the machine body, and the left gravity sensing device and the right gravity sensing device are located at the same height and the same width direction of the machine body.
5. The method for automatically shifting the exchange workbench applied to the laser cutting machine as claimed in claim 1, wherein the gravity sensing device is provided with an upper layer force sensor and a lower layer force sensor along the height direction, and the upper layer force sensor is arranged below the workbench flat wheel of the upper layer workbench so that the workbench flat wheel of the upper layer workbench can pass through and press the upper layer force sensor; the lower-layer force sensor is arranged below a workbench flat wheel of the lower-layer workbench, so that the workbench flat wheel of the lower-layer workbench can pass through and press the lower-layer force sensor.
6. The method for automatically shifting the exchange workbench applied to the laser cutting machine as claimed in claim 5, wherein an inductive switch is arranged at the junction of the working area and the feeding area, the inductive switch comprises an upper inductive switch and a lower inductive switch, the upper inductive switch and the lower inductive switch are arranged at the same side of the gravity sensing device, the gravity sensing device is closer to the working area than the inductive switch, and the upper layer workbench/the lower layer workbench sequentially passes through the inductive switch and the gravity sensing device from the feeding area and enters the working area.
7. The method for automatically shifting the exchange workbench applied to the laser cutting machine as claimed in claim 6, wherein during one reciprocating motion of the upper workbench: when the upper-layer worktable moves from the feeding area to the working area to the junction of the feeding area and the working area, an upper-layer sensing piece of the upper-layer worktable senses an upper sensing switch, the upper-layer force sensor starts to work, and when the upper-layer sensing piece senses the upper sensing switch in the process that the transmission mechanism conveys the upper-layer worktable from the working area to the feeding area, the upper-layer force sensor is closed and does not perform data acquisition work;
in the process of one reciprocating motion of the lower workbench: when the lower layer workbench moves from the feeding area to the working area to the joint of the feeding area and the working area, the lower layer sensing piece of the lower layer workbench senses the lower layer sensing switch, and the lower layer force sensor starts to work; when the transmission mechanism conveys the lower-layer workbench to the feeding area from the working area, and the lower-layer sensing piece senses the lower-layer sensing switch, the lower-layer force sensor is closed and does not perform data acquisition.
8. The method of claim 7, wherein the transmission mechanism comprises a servo motor, a transmission chain, a transmission gear, an active traction wheel and a passive traction block, the servo motor is arranged at one end of the machine body, the transmission chain is arranged at the inner side of one side of the machine body, and the transmission chain comprises: the upper straight line section drives the upper layer workbench to run on the lathe bed, and the lower straight line section drives the lower layer workbench to run on the lathe bed; the servo motor is connected with the conveying chain through a transmission gear, the driving traction wheel comprises an upper traction wheel connected with the upper straight line section and a lower traction wheel connected with the lower straight line section, one end of the upper layer workbench/the lower layer workbench is connected with the driven traction block, and the driving traction wheel is connected with the driven traction block; the upper traction wheel and the lower traction wheel are respectively arranged at two ends of the conveying chain.
9. The method of claim 7, wherein the transmission mechanism comprises a first transmission mechanism and a second transmission mechanism, the first transmission mechanism and the second transmission mechanism both comprise a conveying chain, the first transmission mechanism is connected with the upper stage, the first transmission mechanism drives the upper stage to reciprocate along the length direction of the machine bed, the second transmission mechanism is connected with the lower stage, and the second transmission mechanism drives the lower stage to reciprocate along the length direction of the machine bed;
the first transmission mechanism comprises a first servo motor, a first transmission chain, a first driving traction wheel, a transmission gear and a first passive traction block, the first servo motor is arranged at one end of the lathe bed, the first transmission chain is arranged on the inner side of one side of the lathe bed, the first servo motor is connected with the first transmission chain through the transmission gear, the first driving traction wheel is connected with the first transmission chain, the first passive traction block is connected with one end of the upper workbench, and the first driving traction wheel is connected with the first passive traction block;
the second transmission mechanism comprises a second servo motor, a second transmission chain, a second driving traction wheel, a transmission gear and a second driven traction block, the second servo motor is arranged at one end of the lathe bed, the second transmission chain is arranged on the inner side of the other side of the lathe bed, the second servo motor is connected with the second transmission chain through the transmission gear, the second driving traction wheel is connected with the second transmission chain, the second driven traction block is connected with one end of the lower-layer workbench, and the second driving traction wheel is connected with the second driven traction block.
10. The method as claimed in claim 8 or 9, wherein the transmission mechanism further includes a speed reducer, the transmission gear includes a driving gear and a driven gear, the output end of the servo motor is connected to the speed reducer, the servo motor transmits the output torque to the speed reducer, the driving gear is connected to the output shaft of the speed reducer through an expansion sleeve, the servo motor finally transmits the output torque to the driving gear, the driving gear and the driven gear are respectively assembled on the inner sides of two ends of the transmission chain, and the teeth on the driving gear and the driven gear are connected with the transmission chain in a matching manner, so that the driving gear rotates and drives the transmission chain to run.
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Address after: 528311 No. 8-2, Zhujiang Avenue, industrial zone, Bijiang community neighborhood committee, Beijiao Town, Shunde District, Foshan City, Guangdong Province Applicant after: Guangdong Hongshi Laser Technology Co., Ltd Address before: 528311 No. 8-2, Zhujiang Avenue, industrial zone, Bijiang community neighborhood committee, Beijiao Town, Shunde District, Foshan City, Guangdong Province Applicant before: Foshan Hongshi Laser Technology Co., Ltd |
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Address after: 528311 No. 4 Anye Road, Shunjiang Community Industrial Park, Beijiao Town, Shunde District, Foshan City, Guangdong Province Patentee after: Guangdong Hongshi Laser Technology Co.,Ltd. Address before: 528311 Beijiao Town, Shunde District, Foshan, Guangdong, Beijiao, 8, two Pearl River Road, industrial park, Patentee before: Guangdong Hongshi Laser Technology Co.,Ltd. |