RU2807985C1 - Method for needle milling deburring of a flat part - Google Patents

Abstract

FIELD: machining.

SUBSTANCE: invention is related to methods for machine removal of burrs on flat parts after milling slots. The method of needle milling deburring involves feeding the part under a deburring tool. The tool contains two needle cutters, each of which is mounted on its own spindle. Needle cutters are located coaxially with each other with the ability to move along the groove being processed and rotate on spindles in opposite directions.

EFFECT: elimination of burrs is ensured, including “reverse fold” burrs formed during milling of parts.

1 cl, 2 dwg

Description

The invention relates to methods for mechanical removal of burrs on flat parts after milling slots.

Deburring is a problem not only in the production of many metal products, but also in the production of products from other materials where the products may have edges or projections with burrs, such as plastic products.

When deburring metal products, the ability to make uniform bevels along the contour of the product is often a big advantage.

There are many deburring methods, such as electrolytic deburring and vibration abrasive machining, grinding, sandblasting, rinsing with various substances and high-pressure abrasive washing.

These deburring methods used in mass production have many disadvantages, of which the following can be noted: the products must be separated from the abrasive substance; products must be cleaned of dust/liquids; one product may damage another due to mutual contact; The deburring process is not going intensively enough.

Quite often, the so-called “reverse bending” of burrs occurs, which leads to the need for additional processing and a decrease in processing efficiency.

Thus, the problem to be solved is to create a method that allows one to effectively remove burrs, including the so-called “reverse fold” burrs formed during milling of parts.

There is a known method of needle milling for cleaning burrs on the edges of workpieces [1]. In terms of the method of processing edges, it is similar to the claimed one, but solves a different problem - removing burrs formed during rolling of the workpiece.

Closer to the problem being solved is the method of removing burrs from products, in particular from metal products [2], according to which the products are fed under a deburring tool. The tool deburrs the surface of workpieces, the tool comprising a number of deburring rollers consisting of deburring discs, each of which consists of a circular element of abrasive material having radial slots forming a large number of abrasive fingers, each roller being secured to its own a spindle extending radially outward from the drive; the rollers of each pair of rollers rotate around the shafts in opposite directions and rotate around a rotary axis, which runs at right angles to the spindles; in addition, the rollers move back and forth parallel to the surface of the products in a direction transverse to the direction of their feeding. The disadvantage of the device is that it cannot deburr corners and narrow channels for the reason that the width of the deburring sheets determines the limiting width of the groove that can be machined.

The proposed method solves the problem of effective mechanical deburring.

The implementation of the proposed method is illustrated in Fig. 1 and Fig. 2.

For needle-milling deburring of flat parts ( 3 , Fig. 1), after milling the grooves ( 4 ), the part is fed under a deburring tool containing two needle-mills located coaxially to each other ( 1 , 2 ), each of which is fixed on its own spindle. Needle cutters move along the groove being processed ( S ) and rotate on spindles in opposite directions (n ₁ , n ₂ ).

In fig. Figure 2 shows the deburring sequence. Fig. 2 a - initial position of the burrs ( 5 ) after the groove milling operation ( 4 ). When passing the first needle cutter ( 1 ), rotating in direction n ₁ , the burrs are removed and partially bent (Fig. 2 b ). When passing the second needle cutter ( 2 ), rotating in direction n ₂ , final deburring occurs.

The author is not aware of a similar solution to the problem of mechanical removal of burrs by needle milling; the claimed method has sufficient inventive step and practical implementation.

Literature.

1. Abugov A.L. etc. Method of needle-milling deburring. A.s. 1673313. Priority dated May 15, 1989. MPK V23S 3/12. Publ. 08/30/1991, bulletin. No. 32.

2. Khunnebel K.O. (Denmark). A method for removing burrs from products, in particular from metal products. RF Patent 2177869, priority dated 08/05/1997 MPK V24V 9/00. Publ. 01/10/2002. Bulletin No. 1.Patent owner"XX PATENT A/C" (Denmark). The patent has entered the public domain.

Claims (1)

A needle milling method for deburring a flat part after milling grooves, fed under a deburring tool containing two needle milling cutters, each of which is mounted on its own spindle, different in that the needle milling cutters are located coaxially with each other with the ability to move along the groove being processed and rotate on the spindles in opposite directions.