SU1074641A1 - Apparatus for rolling thread on hollow blanks - Google Patents

Abstract

A DEVICE FOR THREADING OF THREAD ON EMPTY BLANKS, containing a stand with a loading unit, a powerhouse with a thread rolling roller head mounted on a hollow shpindle with a sleeve and a gear wheel, kinematically associated with a drive, is different from a driving unit, mounted on a hollow shpindle with a sleeve and a gear wheel, kinematically associated with a drive, is different from a driving unit, mounted on a hollow shpindle with a sleeve and a gear wheel, kinematically associated with a drive, is different from a drive shaft, and there is a kinematically associated drive unit. performance by automating the process, it is equipped with an additional gear wheel placed on the spindle and kinematically connected to the drive, a clutch mounted on the spindle with zmozhnostyu relative rotation and axial movement, and a leash attached to the toothed wheel to cooperate with one of the coupling halves, said second half-clutch is mounted for engagement with the bushing and the additional gear. (L 4 O5 NU

Description

The invention relates to the processing of metals by pressure, in particular to devices for rolling threads on tubular blanks. A device for treating the outer surface of the end of a hollow billet is known, comprising threaded rollers mounted on eccentric axes in a housing associated with a shank, a movable sleeve and countersink placed in a shank 1. A disadvantage of this device is the absence of a drive AND means for mechanizing the knurling process. Closest to the invention is a device for rolling threads on hollow billets, comprising a frame on which the mechanism for loading billets is placed, a power head, having a thread rolling roller head mounted on a hollow shaft with a sleeve and a gear wheel, kinematically associated with drive 2. The known device is its low productivity, caused by the lack of mechanization tools for reversing the knurled head. The aim of the invention is to increase the productivity of the thread rolling process. This goal is achieved by the fact that the device for rolling threads on a pus, ", totals, containing a frame. which holds the mechanism for loading the workpieces, the power head, having a thread rolling roller head mounted on the hollow stem with a sleeve and a gear wheel, kinematically connected with the drive, is fitted with a gear mounted on the stem and kinematically connected with the drive a shpindle with the possibility of relative rotation and axial movement, and an occasion} ohm fixed to the gear wheel with the possibility of interaction with one of the coupling halves, with the second half coupling installed with the ability to interact with the sleeve and an additional gear wheel. FIG. 1 shows the device, the general feed; in fig. 2 is a view A of FIG. one; in fig. 3 shows a section BB in FIG. 2; in fig. 4 shows a section B-B in FIG. 3. A device for rolling threads on hollow billets comprises a bed 1, a power head 2, a hopper 3 for billets 4, a mechanism 5 for feeding billets 4 to a machining zone and a mechanism 6 for dropping processed billets 4 into a receiving bin 7 In the case of the power headstock there is a hollow cylinder 8 in the cavity of which a movable along the axis of the sleeve 9 is installed. The spindle 8 and the sleeve 9 are made with longitudinal slots to move the pin 10, which is rigidly connected to the coupling half 11 mounted on the rod 8, can be moved along it. The sleeve 9 is spring-loaded spring 12, and at the free end, the sleeve 9 has a countersink 13. On the rod 8, the knurled rollers 15 are installed by means of the plate 14 15. In the movable sleeve 9 a rubber amrrtizer 16 is installed and a stop screw 17 is attached, fixed to the threaded sleeve 18, rigidly fixed on the shpinind 8. On the pin 8, the driven elements are mounted in the form of worm wheels: right 19 and left 20. The right worm wheel 19 is mounted on the pin 8 by means of a sub 21, and the left 20 by means of a second pins 22. The right worm wheel is made slots for the clutch 10 coupling half 11. On the pinch 8 with the possibility of free rotation there is another coupling coupling 23 fitted with a lead in the form of a plug 24 for engagement with the rollers 25 of the overrunning clutch 26. The inner cage 27 of the overrunning clutch 26 is rigidly connected to the shpindelde 8, and the outer - with the left worm gear 20. The driven members 19 and 20 receive rotation from screws 28 and 29, which are driven into rotation by the brush-shaped brushes 30 and 31, interacting with the driving bristle 32, which sits on the shaft 33 of the electric motor 34. The screws 28 and 29, 30-32 gear The gearbox is enclosed in the housing 35. The mechanism 5 for feeding the workpieces 4 contains the feed cylinder 36, and the dumping mechanism is made in the form of levers with the power cylinder 37. The pipe blank 4 is cut off from the hopper 3 by the mechanism MDm 6 and is dropped into the prisms 38. also the apparatus 39 for controlling cylinders 36 and 37. The device operates as follows. The billet 4 from the hopper 3 gets to the mechanism 5 for feeding it into the prisms 38. The power cylinder 36, at the command of the control unit 39, delivers the billet 4 to the thread rolling rollers 15, thread rolling occurs from the rotation of the plate 14 connected to the rotating spindle 8 from the right worm wheel 19 When you touch the end of the workpiece 4 with a countersink 13, the last chamfering on tbrz. The workpiece 4 continues to move to the left, moving the sleeve 9, which with its shock absorber 16 acts on the sheath 10, which in turn, moving the coupling half 11, which is rigidly connected to it, comes out of the slits of the right worm wheel 19, disengaging the spindle 8 from rotation (wheel 19 at the same time it rotates freely on the bearing 21). The coupling half 11 engages with the coupling half 23, previously freely rotating on the pinch 8 due to its connection by means of a fork 24 with an overrunning clutch 26 rotating from the left worm gear 20.

At the moment of coupling of the coupling halves 11 and 23, the spindle 8 begins to rotate in the opposite direction rapidly, re-threading and removing the workpiece 4 from engagement with the thread rolling rollers 15.

Thus, thread rolling is carried out in two directions with automatic switching of the shaft and processing the end of the workpiece from the effect of the workpiece itself.

After rolling high-quality threads, the mechanism 6 is thrown off with its levers.

driven by the power cylinder 37, dumps the workpiece 4 in the receiving hopper 7.

The next workpiece 4 from the hopper 3 gets to the mechanism 5 for feeding it into the prisms 38 and the working cycle for thread rolling is repeated in a fully automatic mode.

Compared with the known, the proposed device allows fully automating the process of thread rolling with simultaneous machining of the ends of the blanks, improving the quality of thread rolling by rolling it in two directions and simplifying the design by installing only one electric motor that works without multiple on-off and reverse rotor complicating the electrical circuit of the machine.

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Claims (1)

DEVICE FOR THREADING THREADS ON EMPTY Billets, comprising a bed on which the loading mechanism is placed, a power head having a thread rolling roller head mounted on a hollow spindle with a sleeve and a gear wheel kinematically connected to the drive, characterized in that increase productivity by automating the process, it is equipped with an additional gear placed on the spindle and kinematically connected with the drive, a clutch mounted on the spindle with possible Stu relative rotation and axial displacement, and a leash attached to the gear to engage with one of the coupling halves, said second half-clutch is mounted for engagement with the bushing and the additional gear. figure 1