Intelligent plate parts machining production line combining universal and special equipment

A machining production line for machining plate parts, the machining production line comprising:

• a first-station surface milling machine, a second-station milling machine, a third-station chamfering milling machine, a fourth-station surface milling machine, a fifth-station computer numerical control universal machining center, an automatic feeding device, a truss conveying device, a four-axis two-jaw manipulator, a first waste box, a second waste box, a discharging box, a scrap conveying mechanism, and a controller, wherein
• the production line is arranged in a shape of a square, the automatic feeding device thereof comprises two feeding bodies, longitudinally arranged and placed at a beginning of the production line, a scrap outlet of the scrap conveying mechanism is placed at an end of the production line, and the first-station surface milling machine, the second-station milling machine, the third-station chamfering milling machine, the fourth-station surface milling machine, and the fifth-station computer numerical control universal machining center are placed in a linear sequence between the beginning and the end of the production line;
• the truss conveying device is arranged in parallel with the linear sequence so as to be disposed behind the linear sequence, and the truss conveying device is correspondingly provided with each of a first-station mechanical arm, a second-station mechanical arm, a third-station mechanical arm, and a fourth-station mechanical arm;
• the four-axis two-jaw manipulator is provided between the fourth-station surface milling machine and the fifth-station computer numerical control universal machining center;
• the first waste box, which is for storing defective products, is provided between the first-station surface milling machine and the second-station milling machine, and the second waste box, which is for storing defective products, is provided between the fourth-station surface milling machine and the fifth-station computer numerical control universal machining center;
• the discharging box, which is for storing finished products, is provided to a side of the fifth-station computer numerical control universal machining center;
• and
• two grooves are provided in parallel on a ground of the production line from the first-station surface milling machine to the fifth-station computer numerical control universal machining center of the production line, the scrap conveying mechanism, which is for transporting scraps, is provided in the two grooves, and the conveying mechanisms is sloped out of the ground at the end of the production line to send the scraps above the ground and into a scrap box;
• the automatic feeding device comprises a tray switching device and two disc-type material storage devices, wherein the tray switching device is of an elongated structure and the two disc-type material storage devices are arranged above the tray switching device side by side, each of the two disc-type material storage devices is annularly provided with ten respective material boxes, and each material box is provided with one respective lifting device;
• the tray switching device transports one of the two disc-type material storage devices to one side through a screw drive and transports the other of the two disc-type material storage devices to below the first-station mechanical arm, the respective lifting device lifts workpieces in a given material box of the other of the two disc-type material storage devices to a specific height in sequence, the first-station mechanical arm takes away the workpieces, and after all the workpieces in the given material box have been taken away, the tray switching device rotates at a particular angle to switch to a next material box;
• and after the ten material boxes on the other of the two disc-type material storage devices are all emptied, the tray switching device moves the other of the two disc-type material storage devices to one side for workers to fill workpieces therein, and at the same time, the one of the two disc-type material storage devices, which is filled with workpieces, is moved to below the first-station mechanical arm to continue feeding to achieve automatic continuous feeding;
• the first-station large surface milling machine comprises a bed I, a machine tool protective cover I, an interchangeable flexible clamp I, and two identical vertical milling machines, wherein the machine tool protective cover I and the interchangeable flexible clamp I are arranged above the bed I, the two identical vertical milling machines are respectively arranged on opposing sides of the bed I, and the two vertical milling machines are staggered by a distance of one workpiece for applying tools during milling of an upper surface of a given workpiece;
• a screw drive mechanism is provided inside the bed I for driving the interchangeable flexible clamp I to advance and retract;
• when a workpiece is smaller than a given size, the interchangeable flexible clamp I moves the workpiece to one side of the bed I through a cylinder slide below, and a single one of the two vertical milling machines completes milling and machining of an upper surface of the workpiece;
• when the workpiece is larger than the given size, the interchangeable flexible clamp I moves the workpiece to a middle of the bed I, and the two vertical milling machines apply the tools successively to complete milling and machining of the upper surface of the workpiece;
• and the machine tool protective cover I is in a shape of a herringbone for guiding scraps into scrap chutes associated therewith;
• the second-station side milling machine comprises a bed II, a machine tool protective cover II, a flexible clamp II, and two identical horizontal milling machines, wherein the machine tool protective cover II and the flexible clamp II are arranged above the bed II, the two identical horizontal milling machines are symmetrically arranged on opposing sides of the bed for milling opposing side faces of a workpiece at the same time;
• a screw drive mechanism is provided inside the bed II for driving the flexible clamp to advance and retract;
• and the two horizontal milling machines adjust a distance between two milling cutters thereof through an internal hydraulic slide to implement machining of plate parts with different widths, and the machine tool protective cover II is in a shape of a herringbone for guiding scraps into scrap chutes on two sides of the machine tool associated therewith;
• the third-station side chamfering milling machine comprises a bed III, a machine tool protective cover III, a flexible clamp III, and four horizontal milling machines that are symmetrically arranged on two sides of the bed III, wherein two of the four horizontal milling machines, which are arranged closer to the beginning of the production line than the remaining two horizontal milling machines, are mounted with face milling cutters for milling opposing side faces of a workpiece at the same time, and the two remaining horizontal milling machines, which are arranged closer to the end of the production line, are mounted with chamfering milling cutters for milling chamfers on the opposing sides of the workpiece at the same time;
• the fourth-station surface milling machine has the same structure as the first-station surface milling machine, and therefore the fourth-station surface milling station functions in a same manner as the first-station surface milling machine;
• the truss conveying device comprises the first-station mechanical arm, the second-station mechanical arm, the third-station mechanical arm, the fourth-station mechanical arm, a truss, a rotatable clamping device, a reversible clamping device, and four columns, wherein the truss is fixed to the four columns, and the first-station mechanical arm, the second-station mechanical arm, the third-station mechanical arm, and the fourth-station mechanical arm are placed in a linear sequence on a front side of the truss;
• and each mechanical arm is driven by a respective motor to move in a horizontal direction and a vertical direction on the truss to convey a workpiece between the first-station surface milling machine and the fourth-station surface milling station, wherein the rotatable clamping device is fixed under the first, third, and fourth-station mechanical arms for rotating the workpiece by 90 degrees during conveying to achieve a side change of the workpiece;
• and the reversible clamping device is fixed below the second-station mechanical arm for flipping the workpiece by 180 degrees during the conveying to achieve a face change of the workpiece;
• the four-axis two-claw manipulator comprises a clamping device, an industrial camera II, a connecting plate, and a four-axis robot, wherein the connecting plate is fixed to a lower end of a screw of the four-axis robot, and two clamping devices are fixed to a lower end of the connecting plate for gripping, conveying, and blanking a workpiece;
• the industrial camera II is fixed to a first side of the clamping device for capturing workpiece surface quality images of the fourth-station surface milling station so as to identify defective products;
• and
• the scrap conveying mechanism comprises a right end sprocket, a motor, a bracket, a roller, a chain, a left end sprocket, and a scraper conveyor belt, wherein the bracket is arranged in an underground groove in an elongated shape, a section of the bracket on a right side protrudes from the ground in a shape of a slope, the right end sprocket is provided at an upper right end, the left end sprocket is provided at a left end, and two chains surround front and rear sides of the bracket and between the sprockets on left and right sides, one scraper conveyor belt wraps around the two chains in a ring shape, and the roller is provided at a turning point of the slope of the bracket for limiting the chain from ramping up together with a right side of the bracket;
• and the motor that is fixed to an outer side of the right end sprocket at the right end is driven by engagement of the sprocket and the chain to drive the scraper conveyor belt to rotate in a cycle between left and right ends to transport scraps;
• and a scraper is provided above the scraper conveyor belt at intervals of a distance to ensure that the scraps do not slide down during climbing of a slope on the scraper conveyor belt.