SU26175A1 - Bolts, Rivets, etc. products - Google Patents

Description

The invention relates to machine tools with matrices arranged around the circumference of a rotary drum, the movable parts of which are moved by radial pushers from an eccentric mounted on the main shaft. In the proposed machine, intended for the mass production of rivets, bolts, etc. of the products, face-cut washers are attached to the drums, equipped with fists for the forward movement of stamps and pushers located around the drum circumference, from which the latter serve to push products out of the dies and feed them into blanks.

In FIG. 1 shows a longitudinal section of a rivet making machine; and FIG. 2 - also in section.

On the frame 3, respectively, trimmed end washers 4 are inserted into the ends of the arcuate tides (dotted line in Fig. 2) and tightly screwed with bolts 5 to the frame 3. In the centers of the washers there are square openings into which the shaft b is fixed with lock nuts by its square ends 1, On the shaft 6, the cams 8, in this case one, are mounted on the keys of various shapes. Around the shaft 6 rotates at a certain speed a drum composed of several smaller ones, in this particular case two-9 and 70, which are fastened motionless with each other, for example, with the help of pins 77. The drums 9 and} 0 carry on themselves Regulatory equipment required to perform the necessary operations for the manufacture of any part. When hot heads are ripped on rivets with a diameter of not more than 1 centimeter, small stresses will arise, so that the ring J2 with holes 75 and profiled radially grooves f4 for moving parts 75 of the matrices 20 screwed into the pushers J6 , springs 77, ball 78 and cam disc. On the same drum 9, the receiving rim 79 is fixedly mounted, having the appearance of a ratchet wheel, with semicircular grooves milled parallel to the axis of rotation of the drum yut from the feeder blanks. On the drum 70, the dies 20 are also fixedly fixed, in which the round holes are filled with billets in a timely manner and for the time of planting the head on the left side are covered with moving parts 15, which are moved upwards by a disk cam 8,

Also, the ring 21 is fixedly mounted on the drum W with radially grooved grooves and grooves selected from the outside, in which the sliders 22 with holes are moved, through which the rivets are jerked at the right moments to remove burrs (blunt). Each of the sliders 22 carries on itself a roller 23 rotating on an axis 24 fixed in the slide and receiving movement to the center from the fixed wedge-shaped fist 25. In the reverse position the sliders are retracted by springs 26 (Fig. 1-dashed line) ri abut on the ring worn 2 / tire, sn in which you can replace the sliders.

Along the circumference of the drums 9, 10, or a certain distance from the center, and at the same distance from each other, the required number of round holes are drilled through which the groove coincides with its axis with the axis of the holes and with a width not exceeding their diameter. Springs 28, pushers 29 and balls 30 are inserted into the holes of the drums, after which the rings 31 are put on, protecting the balls and the pushers from being thrown out of the drum, and also protecting the pushers from dust and debris. A punch is placed on the pushers of the drum 10. 32. Into the grooves of the drum they enter, according to their purpose, cut from the end fists 33, mounted on the disks 4. When the drums rotate, the fists 33 are driven by the pushers 29, which together with the sliders 22 and the moving parts / 5 through the fists interacting with them 8, 25, in a consistent and strictly coordinated manner, perform all operations for the manufacture of the rivet, i.e. make the head, cut the burrs, crimp the end of the rod rivet. In the manufacture of more complex parts, a greater number of cams 8, 25, etc. are used. The manufacture, for example, of bolts, will require only one additional cam 6 on the head to compress the head from two sides, and in the manufacture of heavy-duty parts By mechanically reproducible pressures, it is possible to connect other pneumatic, hydraulic and electrical devices of any kind.

When operating the machine at a certain elevation: a cutting machine is installed with a device for automatically feeding the desired / length of rods cut to workpieces. The blanks under the action of their own weight on an inclined tray enter the furnace 35, when passing through which they are heated to the desired temperature. When the pieces are razver, the electric motor is turned on, which causes the machine to rotate through the worm gear with all the equipment on it. At the same time, the heated billets (Fig. 2) will roll along tray 36 into the grooves of the receiving rim / P, alternately passing by the exit opening of the tray 36. Such | The rim / P structure makes it possible to communicate a significant circumferential speed to rotating drums and ensures the reliability of the feeder operation. Trapped in the grooves of the workpiece, rotating together with the drums, immediately begin to push pushers 29 through the holes 7J of the ring 72 and the holes of the matrix 20. When the blanks are in the matrix 20, the pusher 2P moves back slightly. At this moment, part 75 and the stamp 52, extending slightly from the center of the workpiece, will be bounced back from the center. The end of the billet, entering a slightly tapered bore at STOW, is crimped. Then, the 2P pusher, on the left, pushes the workpiece into the matrix 20, and again goes back himself, and at this moment, part 75, through the pusher 76, moves from the center and closes the matrix 20 opening. Next, the stamp 32, moving by means of the fist 33, will precipitate on hot, the blank head rivet with the formation of a small burr, resulting from the allowed, on the completeness of the material head. When the head is ready, the stamp 32 moves to its rightmost position under the action of the spring 28, part / 5 occupies the closest position to the center, opening access to the pushers 29 left, prepared for pushing the rivet. Crawl1-22 at this time with their rollers .23 approaching the fist 25 (Fig. 2; below) and move to the center until the hole in theirs with the head of the rivet coincides. When