SU944790A1 - Multihedron surface working method - Google Patents

Description

The invention relates to the processing of metals by cutting and may be

used in the processing of products bounded by multifaceted surfaces.

A known method of processing multifaceted surfaces, according to which the machining of a multifaceted surface of an article to a multi-blade cutting tool and a workpiece, interrelate and equally directed rotational movements around parallels or intersecting geometric axes and relative feed movement along the axis of the workpiece, while the ratio of the number of faces on the surface and the number of cutting teeth of the tool is set equal to the ratio of the EI of the angular velocities of the tool and the feed stock, i.e. when you turn the tool on one tooth, the workpiece is reported to turn on one face. The number of cutting teeth of the tool is defined as the partial number of faces to be machined and the specified ratio of the angular velocities of the tool and the workpiece 1.

The disadvantage of this method is that with the equality of these relations, only

the only sequence of processing faces is in the order of their location along the cross sectional profile. This limits the technological capabilities of the method, since changing the shape of the edges in most s.puchaev requires the use of a tool with a different number of cutting elements, because

The 10 faces is determined mainly by the ratio of the angular velocities of the tool and the workpiece and, therefore, the ratio of the number of faces and the number of cutting elements.

The purpose of the invention is to expand the technological capabilities of the method by allowing one tool to handle both convex and concave edges.

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To achieve this goal, the ratio of the angular velocities of the cutting head and the product is set, based on the received machining sequence, of the faces, using the D2 ratio. 2,

bech R.G where n. is the frequency of rotation of the product.

R / s; nj - incisive rotation frequency

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Claims (2)

heads, rev / s; z g the number of incisors of the head m is the number of faces of the surface of the product; p is an integer that determines the sequence of machining of faces and is equal to the number of faces on which the product is turned when the tool head is rotated at an angle between adjacent res. The drawing shows the relative position of the tool and the workpiece and reported to them during motion processing. For processing the multifaceted surface of the product 1 with m edges, a blade cutting tool 2, made in the form of a cutting head with Z teeth 3, is used. For shaping the cross section, interconnected and equally directed continuous rotational movements B and B 2 around their geometrical axes 4 and 5, respectively, with the C and p and p flow rates. For the shaping of the surface along the length of the tool 2, the linear motion of the feed S along the axis 4 is also reported. Necessary for shaping the faces behind of this form, the value of the ratio of the frequencies of rotation of the tool and the workpiece is determined at the stage of mathematical processing of the initial data on the geometric parameters of the product. Dvizhentsi division, i.e. the transition from one face to another is carried out directly in the processing process. In the proposed method, this is achieved due to the fact that during the rotation of the tool by one tooth, the product turns on p faces, while processing all m faces of the surface of the number m and p should be mutually simple. Consequently, the ratio of the rotational frequencies of the tool and the product is expressed by the relationship,. П2.m п, - р; г The value of the value of р determines the sequence of processing the edges. For example, with p 1, the faces of the surface are processed in the sequence a, b, c, d, e; when p 2 - a, c, e, b, d; when p 3 - a, d b, e, e; with p 4 - a, e, d, c, b. Thus, some constant values of the number of faces m and the number of teeth z and different values of m p correspond to several values of the ratio Ig / and angular velocities. tool and workpiece. Consequently, the same tool can process surfaces that have the same number but different shape of faces. for surface treatment with five faces (t-5), for example, with a single-tooth tool (z 1) with p 1 and 2 the faces have a concave, and with p 3 and 4, the convex shape of different curvature. If z 2, then when p 1 is treated concave, and with p 2,3 and 4, convex faces of different curvature, etc. are processed. Thus, by specifying one or another sequence of processing faces, it is possible to significantly change them, the shape without changing the cutting tool. Due to this, the proposed method is characterized by wider technological possibilities in comparison with the known one. Claim 1. A method for processing multi-faceted surfaces at a message of a cutting head and a product of interconnected equally directed rotational movements, the ratio of angular velocities of which is chosen depending on the number of surface faces and the number of head cutters, characterized in that the angular velocities of the cutting head and the product are set based on the received sequence of processing faces. 2. Method PS of Claim 1, characterized in that the ratio of the angular velocities of the cutting head and the product is determined from the ratio I -1 px where I is the frequency of rotation of the product, rev / s; UH is the frequency of rotation of the cutting head, rev / s; Z - the number of incisors of the head; tr is the number of edges of the product surface; p is an integer that determines the sequence of processing faces, and is equal to the number of faces, which the product is rotated when the tool head is rotated at an angle between adjacent cutters. Sources of information taken into account in the examination 1, USSR Copyright Certificate 324099, cl. B 23 B 1/00, 1970.