SU770628A1

SU770628A1 - Tool for producing thread

Info

Publication number: SU770628A1
Application number: SU782606732A
Authority: SU
Inventors: Александр Алексеевич Бескорсый; Альберт Михайлович Боярунас; Виталий Федорович Дрожин; Эдуард Вячеславович Рыжов; Олег Сергеевич Андреичиков
Priority date: 1978-04-20
Filing date: 1978-04-20
Publication date: 1980-10-15

Description

II

Изобретение относитс к обработке металлов давлением, а именно к устройствам дл изготовлени резьбы накатывание.м.The invention relates to the processing of metals by pressure, in particular to devices for the manufacture of thread rolling.

Известна плашка дл получени наружной резьбы, в корпусе которой выполнены резьбовые отверсти дл навинчивани роликов , удерживаемых от проворота стопорными элементами 1.A known die for receiving an external thread, in the casing of which threaded holes are made for screwing in the rollers kept from turning by locking elements 1.

Недостаток таких плашек заключаетс в сложности конструкции, определ емой необходимостью выполнени в теле плашки резьбовых отверстий дл роликов и стопор- 10 ных элементов.The disadvantage of such dies is the complexity of the design, determined by the need to make threaded holes for the rollers and locking elements in the body of the die.

Наиболее близким к предлагаемому по технической сущности вл етс резьбонакатный инструмент, содержащий рабочую часть с резьбой, имеющей в поперечном сечении форму многогранника с дугообразными гран ми и деформирующие вершины, расположенные по винтовой линии 2.The closest to the proposed technical entity is a thread rolling tool containing a threaded working part having a cross-sectional shape of a polyhedron with arcuate faces and deforming vertices located along a helical line 2.

Однако такой инструмент сложен в изгоговлении и имеет малую стойкость.„пHowever, such a tool is difficult to wriggle out and has low durability. „P

Цель изобретени - упрощение изготовлени и повышение стойкости инструмента.The purpose of the invention is to simplify manufacture and increase tool life.

Это достигаетс тем, что рабоча часть инструмента выполнена составной в видеThis is achieved by the fact that the working part of the tool is made integral in the form

пакета цилиндрических шайб, ст нутых между собой неподвижно.a pack of cylindrical washers, stacked between them motionless.

На фиг. 1 изображен предлагаемый инструмент дл накатывани наружной резьбы в плане; на фиг. 2 - то же, разрез А-А, на фиг. 1; на фиг. 3 - инструмент дл накатывани внутренней резьбы, план; на фиг. 4 - то же, разрез Б-Б на фиг. 3.FIG. Figure 1 shows the proposed tool for rolling an external thread in the plan; in fig. 2 - the same, section A-A, in FIG. one; in fig. 3 — internal threading tool, plan; in fig. 4 is the same, section BB in FIG. 3

Инструмент содержит шайбы с элементами внутренней резьбы 1 или наружной резьбы 2 и шайбы без резьбы 3. У шайб с элементами резьбы 1 или 2 отверстие выполнено эксцентричным относительно наружной поверхности.The tool contains washers with elements of internal thread 1 or external thread 2 and washers without thread 3. For washers with elements of thread 1 or 2, the hole is made eccentric relative to the outer surface.

Шайбы 1 (или 2) взаимозамен емы, за исключением крайних шайб пакета, содержащих заборный конус (не показан). Дл того, чтобы при сборе шайб в пакет их резьбовые элементы расположились на одной винтовой линии, а в плане образовали правильный п-угольник, кажда из них должна быть повернута относительно предыдущей на угол, определ емь1Й соотношениемThe washers 1 (or 2) are interchangeable, with the exception of the extreme package washers containing an intake cone (not shown). In order to assemble the washers into the package, their threaded elements are located on one helix and to form a regular p-gon in the plan, each of them must be rotated relative to the previous one by an angle, defined by the ratio

Claims

.. where "is the angle of relative rotation of two adjacent washers with thread elements (washers 1 or 2); n - the number of sides of the polygon, forming, egos in terms of the set of washers in the package; h is the height of the washer 1 or 2; h I is the height of the intermediate washer 3. In this case, the height of the washer 1 or 2 is selected depending on the steepness of the thread helix and is determined by the relation (ci, where m is an integer selected depending on the presence and height of the intermediate washers 3; K is an integer number; cp is the angle of inclination of the helix of the thread; d is the diameter of the holes of the washers 1 or 2. For example, if in the plan the hole of the die has the shape of a triangle with arched sides, the height of the washer 1 (or 2) is chosen so that the threaded element is located on the arc of the washer surface equal to 30 °, 60 °, 120 °. 390 °, 420 ° and etc. (An angle exceeding 360 ° indicates that each washer contains more than one full thread turn.) The washers without thread 3 are made with holes concentric with respect to the outer surface. The washers 3 for the cushions have an orifice diameter larger than that of washers 1, and for chipless taps - the outer surface diameter is smaller than that of washers 2. In the manufacture of the die, the washers 1 are assembled into a bag with each of them turning relative to the previous one at such an angle that the screwed elements of the washers are on the same helix. If a die with a discontinuous thread is made, between the washers 1, a washer 3 is installed that does not have a thread, and the angle of relative rotation of the washers 1 is increased. Due to the eccentricity of the holes of the washers), the hole in the plate will have in the plan the shape of a polygon bounded by circular arcs. Such a shape of the die face provides favorable plastic deformation conditions, creating a smooth transition in the lead-in part and a backed up back surface of the tool. In the manufacture of a chipless tap, the washers 2 are assembled on a mandrel with each of them turning relative to the previous one by an angle, ensuring that the threaded elements are located on one helix. The eccentricity of the holes relative to the outer surface of the pucks 2 will ensure the placement of the working elements in the plan along the perimeter of the polygon with arcuate sides. The use of the tool described will make it possible to obtain a significant economic effect by simplifying the production of the tool by recruiting identical washers, as well as by increasing durability by replacing worn package washers. This tool design will allow wear-resistant coatings to be placed on the elements of the washers, which will also increase tool life. Claims An instrument for making threads by the method of plastic deformation, comprising a working part with threads having a cross-sectional shape of a polyhedron with arched faces and deforming vertices located along a helical line characterized in that, in order to simplify manufacture and improve tool life the working part is made integral in the form of a package of cylindrical washers, stacked between them motionless. Sources of information taken into account during the examination 1. USSR author's certificate No. 4066610, cl. B 21 N 3/06, 27.06.74.

2. US patent number 3772720, cl. 10-10R, published. 11/20/73.

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