SU1395440A1 - Arrangement for stepped feed - Google Patents

Description

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device through the use of a centralized source of energy, as well as increasing the accuracy of movement. Under compressed air pressure, the plunger 27 with the rod 30 carrying the limit switches moves down. The flag of the first switch gives the command to stop the flow of oil from the cavity 26 into the cavity 40, the movement of the plunger 27 stops. Programmer 16 is ready for operation.

From the Start button, and later, the switches 38 and 39 automatically operate, and the slider 18 with welding tongs 23 begins to periodically move one step between the points being welded. At the time of the stop welding is carried out. During welding, the tongs bypass the obstacle. When the thickness changes, the welding conditions are corrected. The device allows you to change the movement program. 4 il.

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The invention relates to mechanical engineering, in particular, to the production of devices for the stepwise movement of a working body, and can be used mainly in the manufacture of structures made by resistance spot welding, when welding tongs are used as a working body.

The purpose of the invention is to simplify the device and ensure reliability by using a centralized energy source, as well as increasing the accuracy of movement. .

Figure 1 shows a device for welding bases of passenger cars with a device for step-by-step delivery of welding tongs; FIG. 2 is a section A-A in FIG. 1, FIG. 3 is a section BB in FIG. 2 in FIG. 4, view B in FIG. 2.

The device for welding passenger car bases contains a base 1 with a plate 2 placed on it, on which the fixing units of the side members of the floor 3 and the side members of the frame 4 are located, the cross member of the motor compartment. 5. The fixing units of the floor spars 3 and the frame 4 side members have clamping units 6 and 7, including pneumatic cylinders 8, cradles 9 and 1 O., and clamps 11 and 12. There are also fixing units of mudguards 13 on the plate 2, and in a place difficult for welding a device for moving welding tongs 14 hydraulically connected by means of connecting tubes 15 with those placed on the base of 1 software 16. The device

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movement of welding tongs 14 includes a carriage 17, a slider 18, which moves along the guides 19 of the hydraulic cylinder 20 located in the carriage 17 housing connected to the slider 18 by means of a flexible rod 21. Install the welded bases 22 on the slider 18 and secure the welding tongs 23 , connected through the sleeves of the secondary circuit -24 to the welding transformer 25. The hydraulic cylinder 20 is connected to the hydraulic cavity 26 of the program-type 16, having equal or greater volume.

5 The programmer has a plunger 27, which interacts with its upper part (piston) with n nematic cavity 28 of the software device, and the lower part with the hydraulic cavity 26, and

0 ratio D / a. D to return the plunger 27 to its original position serves. spring 29. A rod 30 is attached to the upper part of the plunger 27, on which is fixed a bracket 31 with limit switches. On the case of the software device 16 there is a bracket 32, in which the flags 33 are fixed. Flags, located opposite: contactless end switch

0 34, signaling the extreme positions of the plunger 27. Flags, located opposite the proximity switch 35, give a signal to the additional opening of the ticks for stepping

5 obstacles, such as edges or elements of the device. Flags located opposite the proximity switch 36, give a signal to change the mode. Checkboxes located opposite bes31

contact switch 37, determine the spacing between points of the welded product and give a signal through the switch 37 and the valve 38 to stop the carriage drive. The valve 39 serves to set the plunger 27 to its original position, and also gives. opportunity when raising the plunger 27

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pump the working medium from a hydraulic 40 with the software 40 cavity of the atmospheric pressure 40 of the software apparatus into the cavity 26. The pneumohydraulic circuit also includes two throttles 41 and 42 designed to control the speed of movement of the slide 18. Distributor 43 is designed for. supply of compressed air into the cavity 28 of the software device. The welded base is removed from the device using the upper conveyor 44, which delivers it to another position for further processing.

The device works following the image.

Initially, the assembled parts of the base 22 are installed in the assemblies. fixing 3,4 5,13 and clamping in the clamping units 6 and 7 with the clamps 11 and 12 from the pneumatic cylinder 8, the flags 33 are set opposite the corresponding contact switches according to the welding point pitch, bypass obstacles and the required welding modes. After the base parts have been assembled, the distributor 43 is turned on from the button (later it works automatically) and supplies compressed air to the cavity 28 of the software device. At that, the distributor spool 38 is in the middle position and the lines Ж, Г, Т and Р are open, and the distributor spool 39 is shifted to the right and the lines Г and Р, Ж and T are respectively connected. Under pressure of compressed air dd plunger 27 with a rod attached to it 30, on which the bracket 31 with contactless limit switches is attached, begins to move downward until the flag is in the zone of operation of the contactless switch 34 and gives a command to the distributor 39 to stop the flow of oil from the cavity 26 to the cavity 40 of the progr. mmoapparata, the spool of distributor 39 occupies a middle position and motion of the plunger 27 is stopped down. The programmer is ready to work. From

that At that, the slider 18 with welding tongs 23 fixed on it begins to move to the right along the product being welded until the proximity switch 37 does not reach the check box opposite it. As soon as the switch 37 operates and gives a signal to the valve 38 to stop the supply of oil to the cavity I, the valve spool will take up a middle position, and the slide 18 will stop. The switch 37 simultaneously gives a signal for welding, and the tongs set the first welding point. After the end of welding, the signal from the controller of welding cycles goes to switch off the distributor 38 and the cycle repeats.

During the welding process, the tongs bypass the obstacle when the thickness of the metal being welded changes, and the welding conditions change. After welding the last point, the end switch 34 is triggered, which gives a signal to install the distributor 38 valve to the middle position, to move the spool of the distributor 39 to the right, thereby connecting the cavities 26 and 40 of the programmer, and the supply of the compressed air stops through the distributor 43. air into the cavity 28, and the cavity itself through the distributor 43 is connected with the atmosphere. Under the action of the spring 29, the plunger begins to move upward until the contactless switch 34 reaches the flag, after which the valve 43 is activated and supplies squeezed air to the cavity 28 of the device and it is ready to work on the next part to be welded. While the automatic welding works, the operator uses a pendant welding machine (not shown) to tack the base parts at easily accessible points. At the end of the welding, the clamps 11 and 12 are opened in the clamping units 6 and 7 and the welded base 22 is removed.

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the start buttons, and then automatically, the valves 38 and 39 work. The valve of the valve 38 moves to the right, and the valve of the valve 39 to the left, the cavity 26 of the device connecting to the cavity of the hydraulic cylinder 20 and the cavity of the hydraulic cylinder 20 corresponding to 5

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with a cavity of 40 software

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that At that, the slider 18 with welding tongs 23 fixed on it begins to move to the right along the product being welded until the proximity switch 37 does not reach the check box opposite it. As soon as the switch 37 operates and gives a signal to the valve 38 to stop the supply of oil to the cavity I, the valve spool will take up a middle position, and the slide 18 will stop. The switch 37 simultaneously gives a signal for welding, and the tongs set the first welding point. After the end of welding, the signal from the controller of the welding cycle enters to switch off the distributor 38 and the cycle is repeated.

During the welding process, the tongs bypass the obstacle when the thickness of the metal being welded changes, and the welding conditions change. After welding the last point, a limit switch 34 is triggered, which gives a signal to install the distributor 38 valve to the middle position, to move the distributor spool 39 to the right, thereby connecting the cavities 26 and 40 of the programmer, and the supply of compressed air stops through the distributor 43. air into the cavity 28, and the cavity itself through the distributor 43 is connected with the atmosphere. Under the action of the spring 29, the plunger begins to move upward until the contactless switch 34 reaches the flag, after which the valve 43 is activated and supplies squeezed air to the cavity 28 of the device and it is ready to work on the next part to be welded. While the automatic welding works, the operator uses a pendant welding machine (not shown) to tack the base parts at easily accessible points. At the end of the welding, the clamps 11 and 12 are opened in the clamping units 6 and 7 and the welded base 22 is removed.

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from the cradles 9 and 10 of the device, into which further details of the next base to be welded are laid using the upper conveyor 44, which delivers it to another position for further processing.

The use of the invention allows to simplify and improve the reliability of the device, makes it compact and easy to use. The device provides for changing the program for controlling the movement, the accuracy of which is increased.

Claims (1)

Formula from arr, e t VNII A step-feed device containing a working hydraulic cylinder connected to a carriage for fastening the working body, a program mechanism a torus made in the form of a cylinder, a piston with a plunger and limit switches and flags installed on them, and control valves, characterized in that, in order to simplify and increase the reliability of the device by using a centralized energy source, as well as increasing the accuracy of movement, the mechanism of the programmer is made of a step, in a part with a larger diameter a piston is placed, in a part with a smaller diameter - a plunger, a supra-organ cavity through the distributor is connected to a compressed air system, The piston cavity is connected with the air atmosphere, the sub piston cavity is connected to the working hydraulic cylinder and the sub piston cavity through the distributors : -Five .1 Editor V. Kovtun 37 3 / FIG. Compiled by E, Vetrova Tehred M. Didyk. Corrector in. But ha 33