SU124285A1 - Multi-spindle automatic tapping machine - Google Patents

Description

Known multispile self-tapping automatically: stack with. bunker loading of blanks of nuts into a drum rotating on a vertical axis, in which the blanks are strung on the shanks of bent taps and fed by means of rollers into the hole of the spinning screws on the working parts of the taps.

In the described multispindle automatic tapping machine, the nuts are fed by the rollers not arbitrarily, but by the pitch of the thread being cut, which improves the quality of the thread and improves the working conditions of the taps. For these purposes, the rotation of the feed rollers is carried out by means of a lever-ratchet mechanism, driven by a fixed ring roller. A rotary lever is placed in the drum, carrying a reflector plate at one end at the periphery, and a flap at the other end, designed to close the openings in the bunker, which provides for metering the supply of nuts from the hopper to the drum, depending on the filling of the latter.

FIG. 1 shows a machine diagram; in fig. 2 - machine, top view; in fig. 3 is a diagram of the feed roller assembly; in fig. 4 is a diagram of a roller drive; in fig. 5 - axial section of the drum; in fig. 6 - top view drum (without hopper); in fig. 7 is a diagram of the cartridge, for the tap.

The machine is designed for cutting small nuts, which is carried out by curved taps /, and the cutting is done both with a single brush and with a brush. The machine has a nut-cutter heads, which with the help of gears 2 interlock with the central bristles 3. In the central part of the body 4 heads are mounted on ball-bearing pins, spindle 5, and KOTOpbiii has a gear 2 attached to it. A spindle 6 is mounted on a sliding fit. , the inner hole of which is made in the form of a nut with lateral grooves | J 24285 2 ei for passing starter and oil. The spindle 5 with the chuck 6 is engaged frictionally with the help of balls 7. The force on the rotation of the cartridge in the spindle is assembled with screws due to the compression of the springs. The cartridge is held by a secured lock nut 8, a nut 9, which is fitted collineally with an internal annular groove for the passage of oil from the backplate 10. The cartridge has inside longitudinal grooves communicating with the oil line 10, from which oblique apertures going inwardly but in the direction of cutting nuts . In the input part of the cartridge, there are four stoppers of the stopper type for orienting the nuts. On the inner} diameter of each nut-tapping head / i, there are three rollers, which feed the blanks of nuts into the cartridge. The central of these rollers 12 is wired and interlocked with the other rollers 13 by means of cylindrical gear 14. Rollers 13 are brought in and retracted at the time of installation of the bent taps. On the roller 12 in the upper part there is a ratchet 15 fastened, which keeps the rollers from moving backwards in front of the pawl 16. In the part of the roller 12 there is a ratchet 17, with the help of which all three rollers are rotated when the workpiece is fed to the cutting bar. The rotation of the ratchet 17 is carried out by the lever IS, which has a return travel, and has a pawl 19.

The movement of the lever 18 is effected by interacting it with the central chopper 3; on one / g of the generous part of the rotation of the pinion 3, the cam with the asterisk 21 is rotated with the help of the finger 20, which ensures the magnification of the interval between the nuts; over a few revolutions of gear 3, the lever 18 moves (swings) onto the rollers one time. From inertial rotation, the asterisk is fixed by the spring 22, and the lever} 8 is under the influence of the spring .2. The central gear 3 is driven by a V-belt transmission 24 and 25 by means of a shaft 26 rotating in the housing 27.

A drum 28 is installed in the middle part of the machine table. It rotates from the V-belt transmission 29, 30 with the help of the shaft 5 /, which rotates inside the shaft 26. When the drum 28 is rotated, the billet nuts are strung on the shanks of the bent taps. To increase the friction of the nuts on the bottom of the drum, coil springs 32 are reinforced by means of a central nut, which additionally increases the pan (put on the shanks of the taps) nuts on the feed rollers. In the central part of the drum 28 on the casing 33 a hopper with a lid 34 is mounted, on which twelve feed rollers 13 are mounted. In the casing 33 there is an opening 35, closed from the bottom by a flap 36, which eliminates the arbitrary loss of nuts when installing and removing the hopper . The housing 33 is connected to the cap 34 by means of a bayonet connection. During the rotation of the drum nut 32 with Pomonghiu saliva 37 shakes flap 36,

For the purpose of dispensing the supply of nuts from the hopper into the drum 28, depending on filling it, a rotary lever 38 is placed in the drum, having a reflector shield 5.9 at one end of the drum periphery, and a damper 40 at the other end. The centrifugal force rotates around the circumference, forming a ring of nuts, the thickness of which depends on the number of nuts in the bucket. A rocking roller 41 is provided for permanently destroying the collar of nuts in the conical part of the housing 33. The reflective flap 39 can move along the lever 38 while adjusting for a certain type of nuts. The movement of the spring 42, which constantly acts on the lever 38, is controlled by a fixed stop 43.

In the absence of nuts in the drum 28, the spring 42 through the lever 38 brings the flap 39 closer to the side wall of the drum and the flap 40 fully opens the hole 35.

When nuts are present in the drum 28, the spring 42, through the lever 38, brings the shield 39 closer to the drum side wall and the polyostea 40 opening opens the hole 35. When the nut blanks enter the drum, the shield 39 starts moving away from the drum side wall, and the valve 40 blocks the hole 35 as increase the number of nuts in the drum. The drum 28 is covered with a reflective cap 44. Reflective covers (not shown) are provided in the upper part of the side wall of the drum to eliminate the jamming of the nuts.

In front of the feed rollers J2 and 13, one additional roller 45 is installed, limiting the longitudinal movement of the bent tap and perceiving the rotational moment transmitted by the curve to a part of the tap when cutting nuts. Thereby, the feed rollers are unloaded from the load of lateral forces, which improves the gripping of the nuts, keeps the fence curve of the cylindrical tap at a certain position inside the drum 28 and contributes to the stringing of the nuts on the shanks of the taps.

The feed rollers periodically rotate, capture the nuts and feed them into the rotating chuck, in which the thread is cut with the cutting part of the tap.

Subject invention

Claims (2)

1. Multiple pick-up automatic tapping machine with bunker loading of blanks of nuts into a rotary drum on a vertical axis, in which the blanks are strung on the shank of bent taps and fed to the working parts of the taps by means of rollers into the hole of the rotating spindles, in order to improve the working conditions of the taps and improving the quality of cutting, the rotation of the feed rollers is carried out in accordance with the pitch of the cut thread by means of a lever-ratchet mechanism, which is activated from Allen fist. 2. The machine according to claim 1, characterized in that, in order to meter the supply of nuts from the hopper to the drum, depending on the filling of the latter, a rotary lever is placed in the drum, carrying a reflective shield at one end of the drum periphery, and a flap at the other end designed to block the hole in the hopper. ual 31 AJ ( fe-sfi Liking 12