CN110861939A

CN110861939A - Distributor for ultrathin sheet-shaped workpiece and application method thereof

Info

Publication number: CN110861939A
Application number: CN201911311814.6A
Authority: CN
Inventors: 方朝俊; 谭璀璨
Original assignee: Changsha Intelligent Manufacturing Research Institute Co Ltd
Current assignee: Changsha Intelligent Manufacturing Research Institute Co Ltd
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-03-06

Abstract

The invention discloses a distributor for ultrathin sheet-shaped workpieces and an application method thereof, the distributor comprises a rack, a double-acting cylinder, a push plate, a workpiece enclosing frame, a sensor and a PLC (programmable logic controller), wherein the double-acting cylinder is fixed at the upper end of the rack, the push plate is fixed on the double-acting cylinder, a workpiece stack is arranged at the front part of the push plate, the workpiece enclosing frame is fixed at the upper end of the rack and corresponds to the periphery of a workpiece, the sensor is arranged at a material taking position where the workpiece is pushed by the push plate and is used for detecting whether the material exists or is short of the material at the material taking position and feeding back a detection result to the PLC, the PLC controls the double-acting cylinder to. The material distribution and feeding of the ultrathin sheet workpiece in a specific type are realized, and the ultrathin sheet workpiece is an electromechanical integrated system which integrates machinery, electricity, a sensor, a controller and the like.

Description

Distributor for ultrathin sheet-shaped workpiece and application method thereof

Technical Field

The invention relates to a distributor, in particular to a distributor for ultrathin sheet-shaped workpieces and an application method thereof.

Background

In the industrial industry, a product is usually assembled by a plurality of parts, and in an assembly station, in order to facilitate assembly of the product by an assembly worker or an assembly robot, a special dispenser device is required to be continuously supplied for use from a large number of parts one at a time, so that the assembly efficiency is improved. The material distributor commonly used in the industry at present is provided with a vibrating disc and similar devices, and the structure and the working principle of the vibrating disc and the similar devices are far different from the structure of the invention.

A vibrating plate (Vibrator Bowl) is an auxiliary feeding device for an automatic assembly or automatic processing machine, which is called part feeding device for short. The working principle of the vibrating disk is as follows: the pulse electromagnet is arranged below the vibrating disc hopper, so that the hopper can vibrate in the vertical direction, and the inclined spring piece drives the hopper to do torsional vibration around the vertical shaft of the hopper. The parts in the hopper, as a result of being subjected to such vibrations, rise along a helical track. During the ascending process, the parts can automatically enter the assembling or machining position in a uniform state according to the assembling or machining requirements through screening or posture change of a series of tracks. The working purpose is to automatically, orderly, directionally and neatly arrange the disordered workpieces by vibration and accurately convey the disordered workpieces to the next procedure. The vibrating disk is widely applied to various industries such as electronics, hardware, plastic, clock industry, battery, food, connector, medical appliance, medicine, food, toy, stationery, daily necessities and the like, and is necessary equipment for solving the problem of material supply of industrial automation equipment.

The vibration disc cannot be applied to material distribution and feeding of ultrathin sheet-shaped workpieces, and when the ultrathin sheet-shaped workpieces are stacked together, the friction force between the workpieces is large, so that the ultrathin sheet-shaped workpieces cannot be sorted through vibration separation. And the flaky workpieces are easy to elastically deform, the friction force between the workpieces is large, and the separation of ultrathin workpieces cannot be realized by common electromagnets and the like.

Disclosure of Invention

The invention aims to provide a distributor capable of automatically pushing an ultra-thin sheet workpiece at a time and an application method thereof.

The invention provides a distributor for ultrathin sheet-shaped workpieces, which comprises a rack, a double-acting air cylinder, a push plate, a workpiece enclosing frame, a sensor and a PLC (programmable logic controller), wherein the double-acting air cylinder is fixed at the upper end of the rack, the push plate is fixed on the double-acting air cylinder, a workpiece stack is arranged at the front part of the push plate, the workpiece enclosing frame is fixed at the upper end of the rack and corresponds to the periphery of a workpiece, the sensor is arranged at a material taking position where the workpiece is pushed by the push plate and is used for detecting whether the material is available or unavailable at the material taking position and feeding back a detection result to the PLC, the PLC controls the double-acting air cylinder.

In one embodiment of the above technical solution, the rack includes a rectangular support frame and a rectangular top plate detachably connected to an upper end thereof by a fastener.

In one embodiment of the above technical solution, the double acting cylinder is detachably fixed to a width direction center plane of the rectangular top plate by a fastener.

In one embodiment of the technical scheme, the workpiece enclosure frame comprises a pair of fixed side plates, a pair of height-adjustable side plates and a pair of supports, the supports are inverted U-shaped bodies, the two U-shaped bodies are perpendicular to the push plate and are detachably fixed on the rectangular top plate through fasteners in a front and back arrangement mode, a connecting plate along the width direction of the height-adjustable side plates is arranged at the bottom of the outer side of each height-adjustable side plate, a bolt with a downward rod body is connected onto the connecting plate, nuts are respectively connected to the upper side and the lower side of the bolt rod body, which correspond to the connecting plate, the lower end of the rod body is screwed into the U-shaped bodies, and the pair of fixed side.

In one embodiment of the above technical solution, the upper surface of the push plate has a concave step surface with a thickness not greater than one piece of workpiece from the workpiece stacking position to the front end, and the shape of the thrust surface at the rear end of the concave step surface matches with the shape of the periphery of the workpiece.

In an embodiment of the foregoing technical solution, the sensor is a proximity sensor.

In an embodiment of the above technical scheme, the two ends of the rectangular support in the length direction are symmetrically connected with connecting seats for rigid connection with the conveying line.

In one embodiment of the above technical scheme, the gas path of the double-acting cylinder includes a PU hose and a three-position five-way center-sealed solenoid valve, a speed control valve, a muffler and a quick-change connector connected thereto, and the PU hose is connected to the gas outlet connector of the gas source equipment.

In one embodiment of the above technical solution, the PLC controller is provided with manual, automatic, emergency stop and switching buttons, and the PLC controller is connected with an audible and visual alarm.

The invention provides a method for separating and feeding ultrathin sheets by using the distributor, which comprises the following steps:

(1) when the sensor detects that the material taking position is short of materials, the sensor sends a signal to the PLC, the PLC sends a signal to control the double-acting air cylinder to act, and the push plate pushes out a piece of workpiece to the material taking position to be used along with the action;

(2) when the sensor detects that a workpiece is arranged at a material taking position, the sensor sends a signal to the PLC, so that the PLC stops operating until the material taking position detects that the material is short;

(3) when the sensor still sends a material shortage signal to the PLC after the double-acting cylinder continuously acts twice, the PLC sends a signal to the audible and visual alarm to alarm, manual intervention processing is informed, and meanwhile, the PLC stops operating.

The invention adopts the accurate pneumatic sliding table of the double-acting air cylinder as a power source of the push plate, so that the accurate pneumatic sliding table can accurately reciprocate, stacks workpieces on the push plate, simultaneously arranges a workpiece enclosing frame at the periphery of the workpieces, and arranges the workpiece enclosing frame and a side plate which is vertically arranged on the push plate into a height-adjustable structural form, so that the lowest workpiece of the workpiece stack is pushed to a material taking position from the lower part of the height-adjustable side plate of the workpiece enclosing frame for standby application by the push plate moving forwards once under the action of the double-acting air cylinder. And whether a workpiece is ready to be used or not at the material taking position is detected by a sensor arranged at the material taking position, and detection information is transmitted to a PLC (programmable logic controller), the PLC controls the action of a double-acting air cylinder according to the received information, so that the problem of material distribution and material supply of the ultrathin sheet workpiece which is a specific type of part is solved, and the system is an electromechanical integrated system which integrates machinery, electricity, the sensor, the controller and the like.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic top view of fig. 1.

Fig. 3 is a left side view of fig. 1.

Fig. 4 is an enlarged schematic view of the portion C in fig. 1.

Fig. 5 is a schematic axial side structure diagram of the present embodiment.

FIG. 6 is an enlarged top view of the pusher plate of FIG. 1.

Fig. 7 is a schematic diagram of the air passages of the double-acting cylinder in the embodiment.

Fig. 8 is an electrical schematic diagram of the present embodiment.

Detailed Description

As can be seen from fig. 1 and 5, the material distributor for ultrathin sheet-like workpieces disclosed in the present embodiment includes a frame 1, a double-acting cylinder 2, a push plate 3, a workpiece enclosure frame 4, a sensor 5, and a PLC controller 6.

As can be seen in conjunction with fig. 1 to 5:

the frame 1 comprises a rectangular support frame 11 and a rectangular top plate 12 detachably connected to the upper end thereof through bolts and nuts. The two ends of the rectangular support frame 11 in the length direction are symmetrically connected with connecting seats 13 which are used for being rigidly connected with a conveying line.

The double acting cylinder 2 is fixed to the width direction center face of the rectangular top plate 12 by bolts and nuts. The push plate 3 is fixed on the double-acting cylinder 2 through bolts and nuts. The double-acting cylinder 2 is used as a power source for the push plate 3 to reciprocate back and forth.

As shown in fig. 7, the air path of the double-acting cylinder 2 includes a PU hose 25, a three-position five-way middle sealing electromagnetic valve 22, a speed control valve 21, a muffler 23, and a quick change coupler 24 connected thereto, the PU hose 25 is connected to an air outlet coupler of an air supply device, the speed control valve adjusts the operating speed of the double-acting cylinder, and the muffler reduces air noise. The three-position five-way middle sealing electromagnetic valve can prevent the cylinder from being damaged due to actions after the air source is lost or the system is in failure.

When the invention is used for distributing and feeding materials through the push plate 3, the workpiece stack is piled in front of the upper surface of the push plate. That is, the push plate pushes out the lowest workpiece of the workpiece stack each time, while the workpiece above the push plate needs to be kept in place. Since the workpieces have mutual acting force, the workpiece enclosure frame 4 must be arranged on the periphery of the workpieces.

The push plate pushes the workpiece to a material taking position for standby, and the push plate is retracted after the workpiece is taken.

Meanwhile, as shown in fig. 6, the upper surface of the push plate 3 must have a specific structural design: the upper surface of the push plate is provided with a concave surface 31 slightly smaller than the thickness of a workpiece from the workpiece stacking position to the front end, and the shape of a rear end thrust surface 32 of the concave surface is matched with the peripheral shape of the workpiece. If the thickness of the workpiece is 0.3mm, the height of the thrust surface is preferably 0.2-0.25 mm.

The push plate is made of high-hardness and high-strength materials such as 40Cr and nitrided steel, so that the long-term operation requirement of the system is met.

As can be seen in conjunction with fig. 1 to 5:

the work enclosure frame 4 includes a pair of fixed side plates 41, a pair of height-adjustable side plates 42, and a pair of brackets 43. The bracket 43 is an inverted U-shaped body, the two U-shaped bodies are perpendicular to the front and the back of the double-acting cylinder 2 and are fixed on the rectangular top plate 11 of the frame 1 through bolts and nuts. The bottom of the outer side of the height-adjustable side plate 42 is provided with a connecting plate 421 along the width direction thereof, the connecting plate is connected with a bolt with a rod body facing downwards, the upper side and the lower side of the bolt rod body corresponding to the connecting plate are respectively connected with a nut, the lower end of the rod body is screwed into the U-shaped bracket, and a pair of fixed side plates 41 are symmetrically fixed between two corresponding brackets 43 at two sides of the push plate 3 on the rectangular top plate 11 through the bolts and the nuts.

Since the push plate 3 pushes the workpiece out from below the height-adjustable side plate 42, a height difference needs to be designed between the lower edge of the height-adjustable side plate 42 and the upper surface of the push plate 3 corresponding to the rear part of the thrust surface. If the thickness of the workpiece is 0.3mm, the height difference is preferably 0.2-0.25 mm. Different workpiece thicknesses need to correspond to different height differences, the height differences are adjusted by rotating the bolt pieces connected with the height-adjustable side plates 42, and the height-adjustable side plates 42 can move upwards or downwards by rotating the bolts to perform field adjustment according to the workpiece thicknesses.

As can be seen from fig. 1 and 5, the sensor 5 is fixed to the material taking position in front of the discharging end bracket 43 through a Z-shaped bracket. The sensor 5 is a proximity sensor.

As can be seen from fig. 1 and 5, the housing of the PLC controller 6 is fixed to the rectangular support frame 11 of the rack 1. The electrical schematic diagram of this embodiment is shown in fig. 8, and the electrical schematic diagram may be different according to different use requirements, but is generally shown in fig. 8, wherein ethernet communication is reserved for connecting with interfaces of production management systems such as MES, and is selectively used according to needs. The PLC is preset with program to realize automatic operation of the system, and can be connected to an upper computer or a factory production management system for operation. As can be seen from fig. 8, the PLC controller is provided with an audible and visual alarm to remind of manual intervention, providing switching, automatic, manual and emergency stop buttons for use.

This tripper designs into workstation structural style, imbeds the production line through connecting seat and work piece transfer chain rigid connection on the frame support frame during the use, and stability is high, and the execution efficiency is high. The automatic material shortage warning device has the functions of fault warning, material shortage warning, switchable manual intervention and the like. The structural members are connected and assembled by adopting bolt and nut fasteners, so that the assembly and disassembly and the subsequent maintenance are convenient. Except the bolts connected with the height-adjustable side plates of the workpiece enclosure frame, other threaded joints are all glued and prevented from loosening by using anaerobic thread fastening glue.

The working principle of the invention is as follows: when the sensor detects that the material taking position is short of materials, the sensor sends a signal to the PLC, the PLC sends a signal to control the double-acting air cylinder to act, and the push plate pushes out a piece of workpiece to the material taking position to be used along with the action; when the sensor detects that a workpiece is arranged at a material taking position, the sensor sends a signal to the PLC, so that the PLC stops operating until the material taking position detects that the material is short; when the sensor still sends a material shortage signal to the PLC after the double-acting cylinder continuously acts twice, the PLC sends a signal to the audible and visual alarm to alarm, manual intervention processing is informed, and meanwhile, the PLC stops operating.

The invention has developed a prototype for test, the effect is good, and is consistent with the expectation of design.

Claims

1. A tripper for ultra-thin slice work piece which characterized in that: it includes the frame, double acting cylinder, the push pedal, the work piece encloses the frame, sensor and PLC controller, double acting cylinder is fixed in the upper end of frame, the push pedal is fixed in on the double acting cylinder, the push pedal front portion is arranged in to the work piece buttress, the work piece encloses the frame and is fixed in the periphery that the frame upper end corresponds the work piece, the sensor sets up in the department of getting material through push pedal propelling movement work piece, be used for detecting get material department have material or lack the material and feed back PLC controller with the testing result, PLC controller control double acting cylinder action is once, push pedal propelling movement a slice work piece is to getting material department.

2. The dispenser for ultra-thin sheet-like workpieces according to claim 1, wherein: the frame includes the rectangle support frame and can dismantle the rectangle roof of connecting in its upper end through the fastener.

3. The dispenser for ultra-thin sheet-like workpieces according to claim 2, wherein: the double-acting air cylinder is detachably fixed on the width direction central plane of the rectangular top plate through a fastener.

4. The dispenser for ultra-thin sheet-like workpieces according to claim 3, wherein: the workpiece enclosure frame comprises a pair of fixed side plates, a pair of height-adjustable side plates and a pair of supports, the supports are inverted U-shaped bodies, the two U-shaped bodies are perpendicular to the push plate and are arranged in front of and behind the push plate and detachably fixed on the rectangular top plate through fasteners, a connecting plate along the width direction of the height-adjustable side plates is arranged at the bottom of the outer side of each height-adjustable side plate, a bolt with a downward rod body is connected onto the connecting plate, nuts are respectively connected to the upper side and the lower side of the bolt rod body corresponding to the connecting plate, the lower end of the rod body is screwed into the U-shaped bodies, and the pair.

5. The dispenser for ultra-thin sheet-like workpieces according to claim 1, wherein: the upper surface of the push plate is provided with a concave step surface with the thickness not larger than the thickness of one workpiece from the workpiece stacking position to the front end, and the shape of the thrust surface at the rear end of the concave step surface is matched with the shape of the periphery of the workpiece.

6. The dispenser for ultra-thin sheet-like workpieces according to claim 1, wherein: the sensor is a proximity sensor.

7. The dispenser for ultra-thin sheet-like workpieces according to claim 2, wherein: and two ends of the rectangular support in the length direction are symmetrically connected with connecting seats used for being rigidly connected with the conveying line.

8. The dispenser for ultra-thin sheet-like workpieces according to claim 1, wherein: the gas circuit of the double-acting cylinder comprises a PU hose and a three-position five-way middle sealing electromagnetic valve, a speed control valve, a silencer and a quick change connector which are connected with the PU hose, and the PU hose is connected with an air outlet connector of air source equipment.

9. The dispenser for ultra-thin sheet-like workpieces according to claim 1, wherein: the PLC is provided with manual, automatic, scram and switching buttons, and is connected with audible and visual alarm.

10. A method for distributing and feeding ultra-thin sheet-like workpieces by using the distributor of claim 1, comprising the following steps: