RU2742099C2 - Automated transport system - Google Patents

Abstract

FIELD: automation of technological processes in machine building.

SUBSTANCE: invention can be used, for example, for movement and lowering-lifting of aluminum structures at position of soldering section. Transport system for article movement comprises carriage installed on horizontal guides with possibility of movement by means of horizontal movement drive, rack with suspension for product placement, located on carriage with possibility of vertical movement by means of vertical movement drive, and control unit, connected to said drives. System is equipped with sensors of initial reading of carriage horizontal movement and vertical movement of said rack, which are connected to control unit, in said drives there used are step motors with gear drives, and control unit includes controller with program of command sequence for supply to step motors of drives.

EFFECT: use of invention widens technological capabilities of system.

1 cl, 1 dwg

Description

An automated transport system for moving a product is used in mechanical engineering and is intended for moving and lowering-lifting of brazed aluminum structures at the loading / unloading position at the salt soldering section.

Known invention of the Russian Federation No. 2049649 dated 12/14/1993, "Transport system", containing belt conveyors longitudinal and associated conveyors, transfer, radius guides, external and internal, installed at the interface of longitudinal and transfer conveyors above the bearing surface of the conveyor belts, satellites, drives of conveyor belts, including bodies with drive, reverse and tensioning units located in them and a control system, characterized in that each transfer conveyor is made in the form of at least three conveyor belts placed on the corresponding rollers of the drive, reverse and tensioning units and forming a common bearing surface for the satellite, and the rollers of the drive unit are fixed motionless on one drive shaft and are made with different diameters, while the conveyor belt enveloping the roller with a smaller diameter is located on the inner side of the transfer conveyor, and the conveyor belt enveloping the roller with a large diameter is located with ext On the other side of the said conveyor, while the tensioning unit of the transfer conveyor is made in the form of rollers installed on the axles in the corresponding forks, and screws located in threaded and coaxial guide holes made in the housing with the possibility of rotation and axial movement relative to the latter, while at one ends of the screws, turnkey heads are made, while the others are fixed with the possibility of free rotation in the holes made in the bases of the forks.

The disadvantage of this transport system lies in the limited technological capabilities of the device, since in this transport system the time for preheating the products and the time for directly soldering the products differ, and there is no function for controlling the time spent on a separate position.

Known invention of the Russian Federation No. 2104853 from 28.11.1996, "Step conveyor of an automatic line", containing a transport bar with cradles for parts, mounted on swinging levers connected to each other by a rod, a reciprocating mechanism and a bar lifting mechanism, characterized in that the reciprocating movement and lifting of the rod are carried out using two adjustable electric motors interconnected with the rod through roller screws, on the nuts of which, with the possibility of movement along the guide rolling pins fixed in the drive bodies, located on a separate bed at the end of the automatic line, carriages are installed, and the carriage mechanism of reciprocating movement is equipped with a guiding groove interacting with a drive roller located on the bar using a bracket, and one of the swinging levers is equipped with an additional arm pivotally interconnected with the carriage of the lifting mechanism and rotating in a plane, parallel th main plane of rotation of the levers.

The disadvantage of the technical solution of this analogue is that it lacks the ability to control the time spent by the product in a separate position.

The closest analogue can be considered a semi-automatic installation described in the book "Soldering of aluminum and its alloys" (A.M. Nikitinsky, M .: Mashinostroenie, 1983, p. 169).

The semi-automatic installation consists of the following components:

- electrical equipment cabinet

- control panel

- two preheating ovens

- furnace electrical cabinets

- transformer

- salt bath

- mechanical arm

- mechanical arm lifting mechanism

- a rack for accessories

- four-arm carousel

- mechanism for lifting and turning the carousel

- lifting pneumatic table

- chambers with supply and exhaust ventilation

The main bearing and driving unit of the entire semi-automatic soldering machine is the mechanism for lifting and turning the carousel. The mechanical arm is used to lift the product from the molten flux of the salt bath without lifting the cross and products from the heating furnaces. This is due to the fact that the preheating time of products in furnaces is much longer than the time of soldering products in a flux bath. Therefore, it becomes necessary to lift the product from the flux bath without lifting the product from the heating ovens. The pneumatic lifting table is used for smooth lifting and lowering of the product. The lifting and lowering speed of the table platform is adjustable. The table platform can be stopped at any height by placing the air valve in the neutral position.

Despite a number of advantages, the semi-automatic installation has significant disadvantages:

- it takes a certain amount of time to complete each operation. The design of the semi-automatic installation does not provide the ability to automatically control the time spent by the product in a separate position.

- the product is attached to the shoulders of the carousel, which means that it is fed to each technological operation in a certain pre-prepared sequence that cannot be changed. This design option does not allow increasing the productivity of a semi-automatic soldering unit due to the rigid connection between the movement of products between the furnaces (four-arm carousel) and the preheating time (10-20 minutes in each bath), although the soldering cycle itself is 1-3 minutes.

- there is no possibility to organize additional working positions, for example, exposure in air, washing from flux, etc.

The proposed automated transport system (hereinafter referred to as ATS) solves the problem of these disadvantages.

The purpose of the proposed invention is to expand technological capabilities and increase productivity by automating the process during line maintenance.

The technical result consists in the fact that the automatic telephone exchange, in addition to the manual mode of operation, has the ability to operate in automatic mode using programmed commands.

The technical result is achieved by the fact that in the ATS, consisting of a carriage, horizontal guides, a drive for horizontal movement of the carriage containing a stepper motor, a toothed pulley, a toothed belt and guide rollers; a vertical movement drive containing a stepper motor, a gearbox, a toothed rack with a suspension and a gearwheel; there are sensors for the origin of the horizontal and vertical drives and a control unit containing a controller with a program of a sequence of commands supplied to the horizontal and vertical drive stepping motors.

The sensors of the origin of coordinates are designed to bind the initial position of the movement mechanisms to the point relative to which the current coordinates of the transported product are counted, and the use of the controller provides the reading of the current coordinates and the execution of the technological process as a whole with the ability to change the sequence of individual technological operations.

The origin sensors and the control unit are a source of information about the position of the movement mechanisms of the transported product, which, when using stepper motors, automatically performs the following functions:

- before starting work, set the position of transport mechanisms to the origin of coordinates;

- in the process of work, determine the current position of the product relative to the origin, set by the control unit by supplying the appropriate number of power pulses to the stepper motors.

The essence of the automatic telephone exchange is presented in the form of a functional diagram in Fig. one.

The automated transport system (Fig. 1) includes the following elements:

1 - carriage

2 - stepper motor

3 - toothed pulley

4 - toothed belt

5 - guide rollers

6 - horizontal guides

7 - stepper motor

8 - reducer

9 - a gear wheel

10 - toothed rack

11 - suspension

12 - control unit

13 - power cable

14 - horizontal drive coordinate origin sensor

15 - vertical drive coordinate origin sensor

The automated transport system operates as follows:

A stepping motor 2 is fixed on the carriage 1, on the shaft of which a toothed pulley 3 is located, which is in engagement with a toothed belt 4. The guide rollers 5 ensure reliable engagement of the toothed pulley 3 with a toothed belt 4. When the stepper motor shaft 2 rotates to the left or to the right, the carriage moves 1 along horizontal guides 6 to the right or left. Also on the carriage 1 is a stepping motor 7 with a gearbox 8. On the output shaft of the gearbox 8, a gearwheel 9 is installed, which meshes with the gear rack 10. When the shaft of the stepper motor 7 rotates, the gear rack 10 moves up or down. At the end of the toothed rack 10, a suspension 11 with a transported product is fixed. The operation of stepper motors 2 and 7 is controlled by the control unit 12 via the movable power cable 13. After turning on the power when moving the carriage 1 to the right until the sensor of the origin of coordinates of the horizontal drive 14 is triggered, the control unit 12 fixes the current position of the carriage 1 at a point with a zero coordinate horizontally. When the carriage 1 is at a point with a zero horizontal coordinate and the suspension 11 is raised until the sensor of the origin of coordinates of the vertical drive 15 is triggered, the control unit 12 fixes the current position of the suspension 11 at a point with a zero vertical coordinate. In the future, the current coordinates of the carriage 1 and the suspension 11 relative to the origin are determined by the number and sequence of power pulses of the stepper motor windings coming from the control unit 12 to the stepper motors 2 and 7, respectively.

The use of a control unit with a controller as part of an automated transport system containing a program with a sequence of commands that ensures the execution of the technological process allows you to change the number, location and sequence of technological positions along which the transported product passes.

Claims (1)

An automated transport system for moving a product, containing a carriage mounted on horizontal guides with the ability to move by means of a horizontal movement drive, a toothed rack with a suspension for placing the product, located on the carriage with the possibility of vertical movement by means of a vertical movement drive, and a control unit associated with the said drives characterized in that it is equipped with sensors for the initial reading of the horizontal movement of the carriage and the vertical movement of the said rack, which are connected to the control unit, while the drive for the horizontal movement of the carriage is made in the form of a stepper motor with a toothed pulley associated with a toothed belt and guide rollers of said belt , the drive for vertical movement of the gear rack is made in the form of a stepper motor with a gearbox, on the output shaft of which a gear wheel connected to the gear rack is installed, and the control unit includes a controller with a program sequence of commands for feeding said stepper motors.

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