SU1201029A1 - Method and device for making fasteners - Google Patents

Description

The invention relates to the processing of metals _{) by} pressure and may be

used in engineering for

manufacturing fasteners,

mostly semi-nuts.

The purpose of the invention is to reduce the consumption of material and increase the productivity of manufacturing half-hens.

On fig.I schematically shows the proposed device for the manufacture of fasteners, a general view; figure 2 is a section aa in fig.I; on fig.Z - the mechanism of fixation of the processed strips, executed by a separate prefix, general view; in fig. 4 is also a plan; figure 5 - scheme of threading in strips.

Device for the manufacture of semi-nuts includes a housing 1 with an axial hole 2 for the passage of the tool and the sleeve 3 with the clamping screws 4 and the clamping bars 5, having a sliding fit. The housing 1 is provided with a latch 6 of the position of the machined strips 7 and is made with parallel transverse grooves 8 for accommodating the machined strips 7 in them. In the sleeve 3 there are through windows 9 for installing the strips 7. The slots 8 of the housing are separated by a support element 10, the thickness of which corresponds to a predetermined value

1201029

the gap between the half-nuts. A part of the surface of the axial bore 2 of the housing is threaded for guiding the tool ¹ . The device can be equipped with an attachment for fastening the strips 7, consisting of a housing 11 with a groove 12 for accommodating the strips, an eccentric clamp 1 3 and a spring-loaded lock 10 14, which ensures a constant spacing of the axial distance of the threaded holes when processing contours and cutting the strips into semi-nuts.

As the initial billets, in the 15th method, two equal-sized strips 7 with a width equal to the height of the half-nut are taken, and after milling, they are installed in pairs in a device with wide 20 edges to the supporting element 10, fixing them with clamping screws 4 and clamping strips 5. Next, in the strips, first they bore the holes and then cut the threads in them, with each of these operations being performed in one pass of the tool simultaneously in both strips. The process is repeated many times by swapping the measuring strips with the help of 30 movable clamp 6. Then, using the attachment, the contours of each pair of half-nuts are processed and the strips are cut into semi-nuts.

Aa

Phi 2

1201029

Claims (2)

G. A method of manufacturing fasteners, mainly half-nuts, in a batch method, including the installation of several initial blanks into a package, their fixation and the subsequent bore of the hole in each product, in order to reduce material consumption and increase productivity, as the original blanks take two equal stripes, set one relative to the other with a gap and symmetrically, and after bore holes carry out thread cutting, milling of product contours and cutting bands on the finished products. 2. A device for the manufacture of fasteners, comprising a housing with a support element and an axial hole for the passage of the tool and a fixing mechanism for the strips to be processed, characterized in that the housing is provided with a fixture of the position of the strips to be processed and you are (filled with parallel transverse grooves to accommodate the machined strips, the support element is placed in the plane of symmetry of the grooves, and on a part of the surface of the axial bore of the housing for the passage of the tool, a thread is made to guide the tool. WTPL 1201029 Fig-1 > 2 one