RU2454301C1 - Composite shaping mill - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to machine building and may be used at milling machine for machining outer and inner surfaces of irregular shape. Proposed mill comprises slotted body and milling plates set to form single shaping line of machined part surface. Body slots accommodates rack-type arbor to clamp said milling plates fitted in body slots along mill axis. Every said rack is made up of bell-crank with means to position it relative to said body, said means being located at bell-crank end zone to allow displacing and being clamped between rack and body slot thrust surfaces.

EFFECT: higher precision, expanded range of machine parts, and higher efficiency.

2 dwg

Description

The invention relates to the field of metalworking equipment, in particular to metal-cutting tools, namely to prefabricated shaped milling cutters, used mainly on milling machines when processing external and internal profiles of complex configuration.

A disk cutter is known comprising a cylindrical body with a mounting hole, cutting flat knives mounted at equal distances from each other in radial grooves of the body, between which are threaded holes for the coupling bolts, and a coupling cylindrical ring with holes coaxial with the threaded holes on the housing ( RF patent No. 2340429, В23С 5/08, В23С 5/22, 2008).

The disadvantages of the tool known from the prior art include the lack in its design of the ability to provide regulation of the position of the knives themselves, which ultimately limits the technological capabilities of the entire tool as a whole.

Also known is a milling cutter for processing the surface of the rail head, comprising a housing and hard alloy plates mounted on the surface of the housing to ensure processing of one side face, the radius surface associated with this side face, and part of the rolling surface of the rail head (RF Patent No. 2279333, B23C 5/14, 2006).

The disadvantages of this tool include the inability to adjust the position of the plates for more precise adjustment of the cutter to the configuration of the workpiece, which limits the technological capabilities of the cutter and reduces the efficiency of its use.

The closest solution from the prior art in terms of technical nature and purpose is a mill for processing the surface of the neck of the rails, equipped with sets of interchangeable knives for each rail size with interchangeable cutting inserts installed in the grooves of the mill body, while interchangeable cutting inserts on each knife in the complex are offset relative to each other with the possibility of forming the desired milling profile (RF Patent No. 79473, B23C 3/00, 2009).

The disadvantages of the known invention also include the lack of the ability to control the position of interchangeable knives for more precise adjustment of the cutter on the processed profile of the product.

The technical problem to be solved by the claimed invention is directed is the creation of such a tool construct that would ensure, when the cutting elements of the cutter are complexly displaced relative to each other (i.e., adjusting), to precisely define the generatrix of the resulting profile.

The technical result corresponding to the technical task is achieved due to the fact that a prefabricated shaped cutter containing a housing with grooves and cutting inserts installed in the conditions specified for the formation of a single line of profiling of the treated surface of the product, according to the invention, is equipped with mandrels uniformly fixed in the grooves of the housing in the form of rails designed to fix the cutting plates on them and located in the grooves of the body along the axis of the cutter, each of the rails made in the form of a two-shouldered the lever with means for their positioning relative to the housing located in the end zones of the lever with the possibility of movement and fixation between the supporting surface of the rail and the supporting surface of the groove of the housing.

A prefabricated shaped mill is illustrated with graphic material, where

- figure 1 schematically shows a prefabricated shaped milling cutter for processing an external profile;

- figure 2 - setting the prefabricated shaped cutter on the size of the product.

The claimed prefabricated shaped mill for processing the external profile (figure 1) contains a housing 1 with six evenly spaced grooves along the cutter’s section, in which rails 2 are installed in the form of a two shoulders lever with removable cutting inserts (SRP) fixed to them 3. In the end zones of the rails 2 there are located means for its positioning in the form of cylindrical bushings 4 and 5, as well as means for their fixation in the form of adjusting screws 6 and 7. The cylindrical axes 8 serve as the axes of rotation of the rails 2 with the formation of cutting plates 3 of a single profile line about ops surface of the product.

The tool is as follows.

The prefabricated shaped cutter is set to the standard size (Fig. 2) by adjusting the position of each rail 2 relative to the mill body 1 using positioning means in the form of cylindrical bushings 4, 5 moving under the action of the adjusting screws 6, 7. At the same time, the adjustment of each rail 2 relative to mill body 1 is controlled by a special template made according to the shape of the outer profile with the required dimensional tolerance.

The operation of the claimed invention is illustrated by the example of manufacturing the external profile of the switch wag. After assembling and adjusting the shaped milling cutter to the specified size of the wit, the cutter is installed on the machine spindle and machining is carried out. To reconfigure the cutter to another size of the wit, the position of the rails 2 relative to the housing 1 is regulated according to another special template that repeats the contour of another size of the wit. Adjustment for each size of the wit is achieved by moving the rails 2 around axis 8 by an angle of 4 ° with the radii of cylindrical bushings 4, 5, respectively, 8 and 10 mm. If necessary, by varying the various ratios of the cylindrical bushings 4, 5 and / or by changing the dimensions of the curved surface of the rail 2, it is possible to achieve angles of rotation of the rail 2 to 12 °.

Thus, the claimed combination of essential features set forth in the independent claim provides the claimed technical result - improving the accuracy of processing the profile and expanding the range of processed products according to standard profiles, which extends the technological capabilities of the claimed device and increases the efficiency of its use.

The analysis of the claimed invention for compliance with the conditions of patentability showed that the characteristics indicated in the formula are significant and interconnected with the formation of a stable set of features unknown at the priority date from the prior art, as well as necessary and sufficient to obtain the required synergistic (over-total) technical result: increased accuracy of profile processing and expansion of the range of processed products for standard profiles.

The properties regulated and described in the claimed technical solution by individual features are well known in the art and require no further explanation.

Thus, the above information indicates the fulfillment of the following set of conditions when using the claimed invention:

- the object embodying the claimed invention, in its implementation can find application in the processing of external profiles of complex shape in any field of engineering, which requires accurate processing of complex shaped surfaces;

- for the claimed object in the form described in the independent claim, the possibility of its implementation using the means and methods known from the prior art on the priority date on the priority date has been confirmed;

- an object embodying the claimed invention, when implemented, is able to ensure the achievement of the technical result perceived by the applicant.

Therefore, the claimed object meets the requirements of the patentability condition of “novelty” and “industrial applicability” according to the current legislation and can be classified as an object of intellectual property - “invention”.

Claims (1)

A prefabricated shaped milling cutter comprising a housing with grooves and cutting inserts established from the conditions for the formation of a single line of profiling the workpiece surface of the product, characterized in that it is provided with mandrels in the form of rails uniformly fixed in the grooves of the housing, designed to fix the cutting inserts on them and located in the grooves case along the axis of the cutter, each of the rails is made in the form of a two-shouldered lever with means for their positioning relative to the body, located in the end zones of the lever with possible the ability to move and fix between the supporting surface of the rail and the supporting surface of the groove of the housing.

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