Metal plate polishing machine and control method therefor

Abstract

The present invention discloses a metal plate polishing machine and a control method therefor. The metal plate polishing machine comprises a work base, the work base is provided with a conveyor belt, a feed motor for driving the conveyor belt, a polishing roller located above the conveyor belt, a main motor for driving the polishing roller, a lifting mechanism for driving the polishing roller to move up and down, and a chassis with a controller inside, the feed motor and the main motor are electrically connected with the controller respectively, the conveyor belt is arranged at a front position of the work base, the feed motor is arranged behind the conveyor belt and is in transmission connection with a drive shaft on a feed end of the conveyor belt, the main motor is located behind the conveyor belt and is in transmission connection with the polishing roller.

1 . A metal plate polishing machine, comprising a work base ( 1 ), wherein the work base ( 1 ) is provided with a conveyor belt ( 3 ) for conveying a metal plate ( 2 ), a feed motor ( 4 ) for driving the conveyor belt ( 3 ), a polishing roller ( 5 ) located above the conveyor belt ( 3 ), a main motor ( 6 ) for driving the polishing roller ( 5 ), a lifting mechanism ( 7 ) for driving the polishing roller ( 5 ) to move up and down, and a chassis ( 8 ) with a controller ( 9 ) inside, a panel of the chassis ( 8 ) is provided with a plurality of buttons ( 10 ), the feed motor ( 4 ) and the main motor ( 6 ) are electrically connected with the controller ( 9 ) respectively, the conveyor belt ( 3 ) is arranged at a front position of the work base ( 1 ), the feed motor ( 4 ) is arranged behind the conveyor belt ( 3 ), the feed motor ( 4 ) is in transmission connection with a drive shaft ( 3.1 ) on the conveyor belt ( 3 ), the main motor ( 6 ) is located behind the conveyor belt ( 3 ), the main motor ( 6 ) is in transmission connection with the polishing roller ( 5 ), and the chassis ( 8 ) is arranged in a width direction on one side of the main motor ( 6 ) away from the feed motor ( 4 ).  
     
     
         2 . The metal plate polishing machine according to  claim 1 , wherein the lifting mechanism ( 7 ) comprises a lead screw ( 7.1 ), a lead screw nut ( 7.2 ) and a hand wheel ( 7.3 ), the lead screw ( 7.1 ) is installed on the chassis (8) in a vertical direction, the lead screw nut ( 7.2 ) is in threaded transmission with the lead screw ( 7.1 ), a casing of the main motor ( 6 ) is fixedly connected with the lead screw nut (7.2), an upper end of the lead screw (7.1) is exposed outside the chassis (8), and the hand wheel ( 7.3 ) is connected with the upper end of the lead screw ( 7.1 ).  
     
     
         3 . The metal plate polishing machine according to  claim 1 , wherein a vertical mounting plate ( 11 ) is arranged between the main motor ( 6 ) and the polishing roller ( 5 ), the casing of the main motor (6) is fixed to the vertical mounting plate ( 11 ), a rotating shaft of the main motor ( 6 ) penetrates through the vertical mounting plate ( 11 ), and an end of the rotating shaft is connected with a central shaft ( 5.1 ) of the polishing roller ( 5 ).  
     
     
         4 . The metal plate polishing machine according to  claim 3 , wherein the vertical mounting plate ( 11 ) is provided with a dust cover ( 12 ), the dust cover ( 12 ) is placed over the polishing roller ( 5 ), and a spacing is reserved between the dust cover ( 12 ) and the conveyor belt ( 3 ) to allow passage of the metal plate ( 2 ).  
     
     
         5 . The metal plate polishing machine according to  claim 3 , wherein both sides of the polishing roller ( 5 ) in a width direction are respectively provided with a press roller, rear ends of the two press rollers are connected with the vertical mounting plate ( 11 ), and the press rollers are arranged to be able to be rotatably matched with the vertical mounting plate ( 11 ) around axes thereof.  
     
     
         6 . The metal plate polishing machine according to  claim 5 , wherein the vertical mounting plate ( 11 ) is provided with slide rails ( 13 ) extending in a vertical direction respectively at positions corresponding to the rear ends of the two press rollers, each slide rail ( 13 ) is provided with a slide block ( 14 ) slidably matched with the slide rail ( 13 ), the rear ends of the two press rollers are connected with the corresponding slide blocks ( 14 ), the vertical mounting plate ( 11 ) is provided with a thrust spring ( 15 ), and the thrust spring ( 15 ) is arranged to apply a downward thrust to the slide blocks ( 14 ).  
     
     
         7 . The metal plate polishing machine according to  claim 5 , wherein the press rollers comprise a front press roller ( 16 ) and a rear press roller ( 17 ) located on both sides of the polishing roller ( 5 ), the front press roller ( 16 ) is located on one side of the polishing roller ( 5 ) close to a feed end, an overrun clutch ( 18 ) is arranged in the front press roller ( 16 ) and/or the rear press roller ( 17 ), and the overrun clutch ( 18 ) is arranged to be in a locked state when a rotational speed exceeds a set value and in an active state when the rotational speed is less than or equal to the set value;  
       when the overrun clutch ( 18 ) is in the locked state, the press roller corresponding to the overrun clutch ( 18 ) can only be rotated in a reverse direction;  
       when the overrun clutch ( 18 ) is in the active state, the press roller corresponding to the overrun clutch ( 18 ) can be rotated in a forward or reverse direction.  
     
     
         8 . The metal plate polishing machine according to  claim 7 , wherein the overrun clutch ( 18 ) comprises an inner barrel ( 18.1 ) and an outer barrel ( 18.2 ) sleeved outside the inner barrel ( 18.1 ), an inside wall of the outer barrel ( 18.2 ) is provided with a plurality of inverted tooth grooves ( 18.3 ) uniformly arranged in a circumferential direction, a plurality of movable pieces ( 18.4 ) uniformly arranged in the circumferential direction are arranged between the inner barrel ( 18.1 ) and the outer barrel ( 18.2 ), one end of each movable piece ( 18.4 ) is hinged with the inner barrel ( 18.1 ), the other end of the movable piece ( 18.4 ) is provided with a tooth ( 18.5 ) matched with the inverted tooth groove ( 18.3 ), the inner barrel ( 18.1 ) is provided with a tension spring ( 18.6 ) at a position corresponding to each movable piece ( 18.4 ), one end of the tension spring ( 18.6 ) is fixed to the inner barrel ( 18.1 ), the other end of the tension spring ( 18.6 ) is connected with the movable piece ( 18.4 ), and the movable piece ( 18.4 ) is disengaged from the inverted tooth groove ( 18.3 ) under the action of a tensile force of the tension spring ( 18.6 ) or rotated outward when a centrifugal force is larger than the tensile force of the tension spring ( 18.6 ) until the tooth ( 18.5 ) of the movable piece ( 18.4 ) is abutted against the inverted tooth groove ( 18.3 ).  
     
     
         9 . The metal plate polishing machine according to  claim 8 , wherein a pressure sensor for detecting a pressure value between the press rollers and the metal plate ( 2 ) is arranged in the front press roller ( 16 ) and the rear press roller ( 17 ) respectively, and the two pressure sensors are respectively communicated with the controller ( 9 ).  
     
     
         10 . A control method for a metal plate polishing machine, comprising the metal plate polishing machine of  claim 9 , wherein the panel of the chassis ( 8 ) of the metal plate polishing machine is provided with an indicator light ( 21 );  
       after the feed motor ( 4 ) and the main motor ( 6 ) are started, if a pressure value detected by a first pressure sensor ( 19 ) in the front press roller ( 16 ) is within a set range  S1  after the metal plate ( 2 ) comes into contact with the front press roller ( 16 ), a first detection qualified signal will be sent, otherwise a suspension signal will be sent, and the controller ( 9 ) shuts down the feed motor ( 4 ) based on the received suspension signal; with time of the first detection qualified signal obtained by the controller ( 9 ) as initial time T0, transmission time t of the metal plate ( 2 ) between the two press rollers is calculated according to a transmission speed v of the conveyor belt ( 3 ) and a distance between the two press rollers; if a second pressure sensor ( 20 ) in the rear press roller ( 17 ) does not obtain a detection signal within a time interval t+C after the initial time T0, or if a pressure value detected by the second pressure sensor ( 20 ) is less than a set range  S2 , a termination signal will be sent, and the controller ( 9 ) shuts down the main motor ( 6 ) and the feed motor ( 4 ) based on the termination signal, otherwise a second detection qualified signal will be sent, wherein C is a set time constant; and the controller ( 9 ) controls the indicator light ( 21 ) to give different light indications respectively when the controller ( 9 ) receives the first detection qualified signal, the second detection qualified signal, the suspension signal and the termination signal.