SU1655638A1 - Device for knurling thread on hollow blanks - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used when rolling threads on hollow billets. The purpose of the invention is the expansion of technological capabilities by rolling threads on small diameter workpieces. The threading device comprises a frame, a transport mechanism and a thread rolling mechanism. The latter is made in the form of a segment and rolling rollers, the transport mechanism is in the form of a chain conveyor, and the loading mechanism is in the form of a drum with pushers and copiers. The drum with pushers is placed on the same shaft with the faceplate, the conveyor with blanks is between the faceplate and the drum, and the copiers are rigidly fixed on the frame with the possibility of interaction with the pushers. When rotating the faceplate, the pushers feed the blanks to the loading position and ensure their movement relative to the tool. 1 hp f-ly, 5 ill.

Description

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The invention relates to mechanical engineering and can be used when rolling threads on hollow billets.

The purpose of the invention is the expansion of technological capabilities by rolling threads on small diameter workpieces.

FIG. 1 shows a device, a longitudinal section; 2 is a section A-A in FIG. one ; on fig.Z - section bb in figure 2; figure 4 - section bb In figure 2; figure 5 - section GG in figure 2.

The device for rolling threads on hollow blanks consists of a shaft 1 mounted on a frame in bearing assemblies. The faceplate 2, the drum 3, the sprocket 4 and the gear 5 are rigidly fixed on it. On the faceplate 2 evenly around the circumference several shaft 6 with gear 7 rotating around the central gear 8 fixedly mounted on the frame are rotated around its axis. 6, knurling rollers 9 are installed, interacting with a threaded segment 10 fixedly mounted on the frame. Axis 11 of the chain conveyor 12 are made hollow to accommodate the blanks 13. On the same axis with each of the knurled rollers 9 in the grooves of the base The raban 3 accommodates the pushers 14, which can reciprocate along its longitudinal axis as a result of the rolling of the stationary copier 16 by the rollers 15. The end face 17 of the pusher 14 is tapered on the side facing the knurling rollers 9. Each knurled roller is provided with a central hole 18 connected by a system of channels with system 19 supplying compressed air to the hole in the faceplate 2. By participating

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A stack of conveyor 12 feeding the workpieces into the zone of action of the pushers 14 in front of the threaded segment 10 is fixed to the spring plate 21, and in the descent zone of the conveyor with sprocket 4 an inclined tray 22. The conical ends of the shafts 6 together with the inner surface of the covers 23 form annular cavities 24.

The device works as follows.

The shaft 1, receiving rotation from the gear 5 connected to the drive device, rotates the faceplate 2, the drum 3 and the sprocket 4 rigidly attached to it. moving reciprocating along its axis, due to the interaction of the rollers 15 fixed on them with a fixed cam 16, the workpieces are put on the thread rolling rollers 9 in the area before the threaded segment. The shafts 6 are rotated around its axis they have gears 7 on them that roll the central gear 8 fixedly mounted on the frame, which occurs as a result of rotation of the faceplate 2 together with the shaft 1. Finally, the workpiece 13 is pressed against the end of the thread-rolling roller 9 by the spring plate 21 (Fig. 3) and is held in such a position before the beginning of the interaction of the roller 9 with the threaded sector 10.

The profile of the copier 16 is designed in such a way that the pushers 14, putting the workpiece on the thread rolling rollers 9, move further in the same direction until the conical surface 17 completely contacts the center hole of the thread rolling roller 9 and remain in this position for the entire time of thread rolling on the workpiece 13, performs the role of a supporting center and providing increased rigidity of the system. Further, after the end of the thread rolling process.

pusher 14 with cam 16 is retracted from the thread rolling roller. At the same time, the hole 20 on the cylindrical forming faceplate 2 is aligned with the device

19, supply compressed air. Last, coming to the workpiece through the channel 18 of the roller 9 and the annular channel 24, removes the workpiece from the roller. The workpiece, as the pusher 14 retracts, passes through the hollow axis 11 of the conveyor 12 and along the inclined chute 22 is retracted from the thread rolling device.

Claims (2)

1. A device for threading on hollow blanks containing a frame with mounted loading, transport mechanisms and a thread rolling mechanism made in the form of a segment and knurling rollers mounted rotatably in the faceplate and kinematically connected with the central drive gear, characterized in that thread quality for by eliminating the possibility of deformation of the rolling rollers, the transport mechanism is made in the form of a chain conveyor, and the loading mechanism 7 in the form of a drum with pushers and copiers, while rolling the rollers are made with a central hole, and the end surface of the pushers has a conical surface that is interoperable with the said central holes rolling rollers, with the drum with pushers placed on the same shaft with the faceplate, the conveyor with blanks between the faceplate and the drum, and copiers are rigidly fixed on the frame with the possibility pusher interaction. 2. The device according to claim 1, characterized in that, in order to expand technological capabilities by rolling threads on small diameter workpieces, equipped with a compressed air supply system. 1655638 0 Fig.4G-G