SU565762A1 - Apparatus for shaping thread by rolling - Google Patents

Description

one /

The image relates to the processing of metals by pressure, in particular to threading devices to thread threads on low-plastic materials, for example, cast housings and logs made of aluminum alloy and other similar materials.

. (. Known thread-rolling devices, including a housing, in which holes JlJ threaded rollers are installed are known.

Known thread rolling devices do not provide the possibility of thread rolling on low-plastic materials.

Known thread rolling device,

containing an elastic case mounted in a cartridge, in the holes of which threaded rollers are mounted.

However, this device is unsuitable for rolling materials with a relative elongation of 2-5% in one pass, since both the knurled rollers of the tool and the thread of the product of low elasticity of the device are destroyed.

The aim of the invention is to (increase

device elasticity when rolling threads on low-plastic materials.

This is achieved by the fact that the proposed re-rolling device is provided with an Intermediate thin-walled yoke with holes around the periphery installed between the housing and the chuck. The holes in the housing for thread rolling rollers are made with an open contour.

FIG. 1 shows a thread rolling device; general view; in fig. 2 - view

ON arrow A in FIG. one.

The proposed device includes a body 1 of a floating cartridge with a leash 2, In the case there is a stop support-nick 3, on which the thin-walled holder 4 is supported, through its periphery are made through holes. In the holder 4, a casing 5 of a knurled die is installed, made thin-walled, of box section, with a large

hunt-through through the periphery and through through in the ends, openings to the center, in which on the axles b and needle bearings 7 mounted knurled

rollers 8. Fixing them with screws 9 and rings Y provides the necessary gaps in the vertical plane, which creates a free self-installation of the rolling rollers within tolerances.

Ringed round rollers with ring cutting are set at an angle of inclination slightly larger than the angle of inclination of the thread, which improves self-rolling at the initial moment of rolling.

To fix the device relative to the product and to maintain the internal diameter of the rolled product into the holder 4, the mandrel 11 with the spring 12 and the locking insert 13 is fixed.

The device works as follows. The chuck is attached to the spindle of a drill, assembly, or lathe, which has a reversing device for direct and reverse turning required for threading & amping and screwing. The product is installed in the fixture on the machine. The machine spindle, rotating with the knurling device, is fed along the axis to the product automatically or manually. Fnksnukitsy liner 13 under the pressure of the spring 12 enters the hole in the product. In this case, the yoke 4 together with the knurled plate rigidly connected with it is placed in the center of the product and, capturing it. The fence part of the rollers 8 moves one step for each rotation of the tongue. The thread rolls to the specified length.

From the adjustable stop, the machine reverse relay is triggered, reverse rotation is engaged, and the rolling device is screwed from the product. The machine spindle returns to its original position. After replacing the product, the cycle is repeated.

Offered; elastic construction

The rolling device allows rolling threads of various products from low-ductile metals and alloys with a relative relative. elongation of 2-5% instead of cutting them, which ensures high economic efficiency.

The proposed device provides rolling threads in cast body parts, (fittings, various parts made of ductile iron for sanitary ware and other types of mass products.

The preliminary calculation of the conditional economic efficiency from the introduction of the proposed device for rolling threads on the hulls and cuttings of Al9 produced at the USSR factories will exceed 200,000 rubles, will release more than 2LO lathes and more than 350 turners.

Claims (2)

1.Sultanov, TA, Rezbonakatnye heads, M., Mashinostroenie, 1966, p. 95, fig. 43. 2. In the same place 96, fig. 44. V Bud L