SU1331627A1 - Method and apparatus for controlling multispindle power nut setter - Google Patents

Abstract

The invention relates to assembly production and can be used for assembly and disassembly works in mechanical engineering, instrument making, machine-tool construction, and other industries. At the same time, the cost of the energy carrier (compressed air) is reduced, for example, when unscrewing the bolts from the base part. The method is implemented by a device comprising a frame 1, a rack 2, a device 3 for mounting the base part 4 on the power table 5 with a multi-spindle head 6 movably mounted on the rack 2. The control of the multi-impeller head 6 is dried by changing the consumption of the energy carrier supplied first through the mainline section, equal to 0.2-0.4 of the magnitude of the mainline design section, after which the supply of energy carrier increases to the optimum, and then decreases to a value less than the optimum supply of energy carrier. 2 sec. n. f-ly, 3 ill. S (L 6,5, g with co 05 U

Description

The invention relates to assembly production and can be used during assembly and disassembly work, in machine building, machine tool building, instrument making, and other areas of technology.

The purpose of the invention is to reduce the energy cost of, for example, unscrewing the screws of the MNOG01NPI single-sided wrench, by changing the amount of supply of energy carrier depending on the magnitude of the resistance in the threaded connection when screwed on with a multi-spindle wrench.

FIG. 1 shows a wrench, a general view illustrating the proposed method; in fig. 2 - mounting of a pneumatic actuator in the body of a pin-type nut driver; on fi1. 3 view A in FIG. I.

The multi-torque screwdriver contains a frame 1, a rack 2, a device 3 for mounting the base part 4. A power table 5 with a multi-spindle head 6 mounted on a rack 2 contains a multi-spindle head 6 containing a cornus 7 with pneumatic distributor 8 fixed on it. , each of which consists of a housing 9. in which the inlet 10 and outlet 11 of the aperture are made, and into the bore of which the rod 12 is installed with the possibility of axial alternation, resting against the starting position under the action of the spring 13 at the end of the boring. An annular groove 14 is made in the rod 12, which reduces the cross-section of the pipelines 15 and 16 of the compressed air supply line to a value of 0.2 to 0.4 of the nominal value of the line in the initial position of the wrench and connects the inlet and outlet ports of the pneumatic distributor. The inlet 10 by pipe 15 is connected to the compressed air supply line (not shown), and the Bii- opening 11 by pipe 16 is connected to the pneumatic actuator 17. Each pneumatic actuator is fixed coaxially in the glass 18, which can be rotated in the bores of the housing 7. The pads x 20 pneumatic actuators 17 are fitted with nozzles 21, spring loaded 22 and able to move along the axis of the spindle 20. At the ends of the nozzles 21, keys 23 are installed, which are mounted with the possibility of axial movement of the pl shoulder ribs 24, spring-loaded springs 25. In the final position of the plunger shoulder rests on the end of the key bore.

Pneumatic actuators 17 by means of levers 26 mounted on them have the opportunity to act on the rods 12 of pneumatic distributors 8.

The control method of the multi-spindle nut driver is as follows.

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When moving the tool 3 with the base part 4 to the assembly area, the wrench is turned on and the power table 5, fixed on the rack 2, moves the multi-spindle shank 6 down. At the same time, compressed air is supplied to the main drives 17 of the multi-head 6, and its idle rotation begins. At the same time, compressed air is supplied through a supply line (not shown) and pipelines 15 to pneumatic distributors 8, from which grooves 14 are formed through rings 1) 1e, creating a section for supplying compressed air equal to 0.2-0.4 of the nominal section the line supplying compressed air, and the pipelines 16 enters the pneumatic actuators 17.

During idle rotation of the pneumatic actuators 17, the rods 12 of the pneumatic distributor 11 8 under the action of the spring 13 abut against the ends of the bores of the housings 9. At the same time, the annular grooves 14 of the rods 12 are misaligned with the inlet 10 and the outlet and the orifices, as a result of which the last ones turn out to be framed. and a limited amount of compressed air is supplied to the pneumatic actuators 17, ensuring their rotation at low speed and low torque.

At the end point of the movement of the power table 5, the spindles 20 of the pneumatic actuators 17 with keys 23 rest against the heads of the bolts of the base part 4 and, having overcome the force of the spring 22, the nozzle 21 moves upwards. As the pneumatic drives 17 rotate under the action of the spring 22, the wrench 23 falls on the bolt head of the base part. In doing so, the plunger 24 is sunk, overcoming the force of the spring 25.

The speed of rotation of the pneumatic actuators 17 is low and the characteristic of the spring 22 is selected accordingly to ensure reliable gripping of the bolt head with the key at the throat.

After the wrench 23 is placed on the bolt head of the base part 4 with its shed, the compressed air supply through the conduit 15 increases, through the groove 14 of the brush 12 to the maximum value that ensures overcoming the tightening of the joint and the drive drives 17 begin to unscrew the bolts. When bolts are unscrewed, the pneumatic actuators 17 perceive the reactive moment arising in this direction, directed in the direction opposite to the rotation of the pneumatic actuators 17. Under the influence of this reactive moment, the pneumatic actuators 17 rotate together with the cups 18 in the pin holders 19. Together with the pneumofevents 17, they rotate to the side of the reactive moment and levers attached to them 26.

When turning, the levers 26 act on the rods 12 of the pneumatic distributors 8 and move them along the bores of the housings 9, overcome the force of the spring 13. As I1TOKOV 12 moves, they open earlier partially blocked inlet and outlet holes of the hydraulic distributors 8 and through pipelines 15, ring groove 14 and pipelines 16, a large amount of compressed air is supplied from the main supply to the pneumatic actuators and thus provides a torque on the spindle 20 of the pneumatic actuator 17, which is sufficient to overcome the resistance of the puff.

When starting off the bolts, the torque of their unscrewing decreases, while the reactive moment perceived by the pneumatic actuator 17 and the force transmitted by lever 26 to the rod 12 of the air distributor 8 decrease. As a result, the rod 12 under the action of the spring 13 moves along the bore of the housing 9, limiting compressed air consumption by pneumatic actuators 18, thereby providing the necessary amount of air to remove the bolts.

Further, when the bolts are unscrewed, as the screwing moment grows or decreases, the pneumatic actuators 17 are supplied with the minimum required amount of compressed air, which is regulated by the neutral distributor 8, depending on the generated reactive torque. In this way, the most economical mode of operation of pneumatic actuators in terms of compressed air consumption is achieved.

At the end of the screwing process, the rotation of the pneumatic actuators 17 is stopped and the magnetic head 6 under the action of the power table 5 returns to its original position. In this case, the bolts under the action of the spring 25 are pushed out by the plunger 24 from the throat of the key 23, and the nozzle 21 under the action of the spring 22 moves along the axis of the pneumatic actuator 17 and is set to its original position.

Simultaneously with the end of rotation of the pneumatic actuators 17, the rod 12 of the pneumatic valve 8, under the action of the spring 13, moves to its initial position, resting against the end of the boring, 1fire, in the housing 9.

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Claims (2)

Invention Formula . The control method of a multi-stage driver, when unscrewing the bolts, involves the continuous delivery of compressed air from the beginning of the operation to its end, and the compressed air is supplied directly to each and the pindle, characterized in that, in order to reduce the consumption of compressed air, the supply is carried out in steps, starting with a value equal to 0.15-0.25 of the nominal required for obtaining the maximum torque, then the supply of compressed air is increased to the value that provides the maximum torque, after which the supply of compressed air is reduced to a value of 0.2-0.4 of the nominal flow. 2. A multi-pinion wrench control device, when unscrewing the bolts, contains a pneumatic actuator with a housing fixed in bearings, inside which is located a pneumatic motor connected with a wrench connected by a pipeline to the outlet of the casing of the air flow adjustment mechanism, and the inlet of the housing is connected to the pipeline A compressed air line, with a cylindrical valve with an annular groove along the body axis, associated with a lever mounted on the actuator body, which in that, with a view to reducing the flow of compressed air, the cross section of the annular groove is 0.2-0.4 sectional line. b; 7., p FIG. 2 Buff A Compiled by A. Short Editor S. PatrushevTehred I. VeresKorrektor A. Ilyin Order 3734/10 Circulation 974 Subscription VNIIPI USSR State Committee for Inventions and Discoveries  l 13035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, ul. Project, 4