FI58602C - ROTERANDE SKAERVERKTYG - Google Patents

Description

· Ivisr-! m ANNOUNCEMENT 58602

FLSTitt v'V UTLAGG N I NGSSKRI FT

C (45) Patents granted 10 03 1931 Patent meddelat (51) Kv.ik.3 / Int.ci.3 g 24 D 13/10 FINLAND - FINLAND (21) Paunttlhakemu * - PatcnttnsBknlng 3701/7 ^

(22) Htkamlipilvi - Antttknlngsdtg 30.12.7U

^ (23) Alkuptlvl - Glltlghttsdig 30.12.7 ^ (41) Become Public - Bllvlt offantlig 01.07 · 76

National Board of Patents and Registration NttelvllCpwon |. moonshine date—

Patent and registration authorities of the United States of America. , USSR (SU) (72) Viktor Samsonovich Salukvadze, Moscow, Larisa Viktorovna Salukvadze,

Moscow, USSR (SU) (7b) 0y Kolst er Ab (5b) Rotary cutting tool - Roterande skärverktyg

The invention relates to a cutting tool according to the type of claim.

The tool according to the invention can be used very effectively to remove slag from hot-rolled metal, to clean the surface of rolled products or to remove a defective layer therefrom and to remove the casting shell from the surface of castings, i.e. to clean metal surface from rust, grease stains and other impurities.

In such tools, emphasis must be placed on the dense placement of the cutting elements (wire pieces), which must also be rigid enough so that the surface of the workpiece does not bend like bristle bristles and slides on the surface of the workpiece without causing cutting.

In a similar tool known from U.S. Pat. No. 3,557,418, the free ends of the wire pieces are kept particularly short by being tensioned between two ring jaws. In this case, the surface of the cutting tool is cylindrical and the ends of the wire pieces bend against it at different angles.

2 58602 With these known tools, you can machine flat workpieces, above all. If it is to be used for machining cylindrical workpieces, its axis of rotation must be parallel to the axis of the workpiece and either part - the tool or the workpiece - must be rotated in a planetary manner around the other part, which is quite laborious. In addition, of course, there will be an axial machining movement forward. In addition to the unavoidable workflow, during the processing of such a round rolling product, transverse cracks often occur on the surface of the product, which is absolutely not permitted, especially in spring steel.

Difficulties are further exacerbated in the case of machining of workpieces with a non-circular cross-section, e.g.

The object of the invention is therefore to provide a known tool in such a way that it is possible to machine a faultless and labor-intensive workpiece, the cross-section of which is practically any or whose surface is arbitrarily curved.

In order to solve this problem, a manufacturing form as defined in the characterizing part of the claim is proposed.

When shaped in this way, the hard shape of the cutting surface of the tool adapted to the shape of the workpiece can be guaranteed without adversely affecting the stiffness of the wire pieces. Machining the workpieces can be done with a simple longitudinal movement and no complicated movements between the tool and the workpiece are required. The cutting elements are fitted to the surface of the tool very densely.

The present invention can be further understood and its various advantages will be better appreciated below from the following detailed description of several exemplary embodiments taken in conjunction with the accompanying drawings, in which: Fig. 1 is an overview of a rotary cutting tool according to the invention; four sets of blade parts, Fig. 3 is the same as Fig. 2 using abbreviated blade parts, Fig. 4 is the same as Fig. 1 for surface machining (cleaning) of rolled angle irons, Fig. 5 is the same as Fig. 4 in a partially sectioned view showing two sets of blade parts, Fig. 6 is a side view taken view of the arrangement of cutting tools when machining round rolled products.

3 58602

The rotary cutting tool for machining products and materials consists of blade elements 1 formed of wire pieces of the same length (Fig. 1), the inner ends of which are connected to each other and arranged in a housing. This housing consists of two flanges 2 and a sleeve 3 connected by screw bolts 4, whereby the sleeve acts to place a cutting tool on the spindle of the machine.

The blade parts 1 are mounted in the housing in groups, the number of which largely depends on the profile of the Pima to be machined. The tool shown in Figure 2 consists of four groups 5, 6, 7 and 8 blade parts 1. Annular spacers 9, 10 and 11 are arranged between the groups in the vicinity of the connected ends of the blade parts 1. All blade groups with their spacers are connected to each other by an arbitrarily selected method, e.g. by means of a film or the like, whereby all the groups of blade parts are assembled into a package using the stacking parts 12. Due to this structure of the blade parts and the presence of spacers, the blade parts, in the vicinity of their connected ends, press against their side surfaces, with their opposite free ends, forming the tool cutting surface "A". The sum of the free end ends of the wire ends on the tool cutting surface "A" The ratio between A "is then 0.10 to 0.99.

Each group 5, 6, 7 and 8 has on each side of the connected ends of the blade parts a part of the surface arc formed by these ends, and the thickness of each spacer 9, 10, 11 is Cy C 1 and C 2, respectively. The thickness of the spacers is chosen so that the cutting surface "A" formed by the free ends of the tool, the free ends of the blades, has a curvature substantially corresponding to the curvature of the surface to be machined, and the blade parts 1 themselves are fitted at the contact point . The approximate thickness of the annular spacers 9, 10, 11 is determined according to the formula DL φ C = L - - C (D - 21) jp 1, where

Lc an is the length of the arc of the surface formed by the blade portions on the side of their joined ends; this arc length is + C; L.j is the approximate lengths of the surface arc magnitudes L '+ L "+ L'" + L, y formed by the joined ends of the blade portions 1; L is the length of the cutting surface "A" of the tool in cross section; 1 is the length of the blade part 1; D is the diameter of the cutting surface of the tool, measured on its axis of symmetry; SP is the ratio between the main surfaces of the free ends of the pieces of wire on the cutting surface of the tool and the entire cutting surface of the tool; is the ratio between the sun of the end faces of the connected ends of the blade parts and the total surface area formed by the end faces of these combined ends.

In order to prevent lateral bending of the cutting parts, the two extreme groups 5 and 8 comprise wire pieces 13 (Fig. 3) which are shorter than the other wire pieces in this cutting tool. The pieces of wire do not come into contact with the surface to be machined and only perform the function of the supports.

Rolled angle iron is machined using the tool shown in Figure 4; the blade parts 1 of this tool consist of wire pieces of the same length and are fastened in the same way as in a tool for cleaning round rolled products. However, this tool includes two groups 14 and 15 (Fig. 5) of blade parts and an annular spacer 16 interposed therebetween. calculated from the formula shown in the thickness of the spacer 16; therefore, the cutting surface formed by the free ends of the tool blade parts is shaped to correspond to the shape of the surface to be machined, i. the shape of the angle-rolled product, as shown in Fig. 5.

Figure 6 illustrates the position of the cutting tool when machining (cleaning) a round casting, e.g. rod 17. This rod moves as shown by arrow B in the figure and the rotatable cutting tools 18 and 19 rotate about their axes in opposite directions. The drawing shows this rotation with the arrow D. As it rotates, each tool cleans its own portion of the side surface of the rod 17. The number of rotating cutting tools depends on the diameter of the product to be machined. When machining an angle rolling product, a rotating window tool is usually used.

The following examples illustrate the way in which a particular rotary cutting tool is selected depending on the shape of the surface to be machined.

Example 1

Assume that it is desired to design and manufacture a rotary winding tool for longitudinal cleaning of the outer surface of a round rolling product with a diameter of 20 mn.

Cleaning should be performed using four tools. From the requirements of the tool life, the length of the blade parts is taken to be 1 = 50 nm. The coefficient used is SP = 0.5 and = 0.9.

According to the proposed invention, the approximate thickness of the annular spacers is calculated from the formula: DL cp C = L - --- C (D - 21) cp ^ 5 58602 This formula must be converted to a dependence to determine the value C of the round rolled product.

The cross-section of the blade section of a tool for cleaning a round rolled product is a sector bounded by two concentric curves L and Lc as well as two converging straight lines consisting of extreme blade sections centered at the point "O" from which these curves are drawn.

As a result, the length of the arc is „* ReC T tf (R + 1) * L -, L - 180 180

By placing these quantities in the formula, a special value of the formula for the purification of round rolled products is obtained.

D— c = 3 (R + 1) Λ _ gtRdC # ΊΜ 180 180 D - 21 which then results in c. _te_ [(R + ixa-21) - dr * 1 180 1 D - 21 j

When it was required that the perimeter be cleaned using four blade parts, then oC = - = 90 °.

4

By fitting the numerical quantities now shown in the obtained equation, the result is m (20 + 50) (200 - 2.50) - 200 · 20 £ 4 “C = -90 · - - = 74.98 nm.

180,200 - 2.50

Example 2

For example, a tool must be made to clean the surface of a round rolled product with 20 x 20 irm flanges. The length of the working parts is required to be 1 = 50 nm, the coefficient = 0.5 and the coefficient ^ ^ = 0.9.

According to the present invention, the approximate thickness of the annular spacer is determined by the formula 6 58602 DL f C = L - - (D - 21) 91

In the case of corner roll product cleaning, L = 2B, i.e. L = 2B1 + C.

Now placing these quantities in the formula gives 2ED- |.

C = 2B. + C - - 'D - 21 from which 2BD - ~ 1 2B1 = -—' is obtained; 1 D - 21 a, - ^ 1 D -21

In order to satisfy the requirements of the present invention for the location of the blade portions perpendicular to the surface to be cleaned, the quantity B must be approximately equal to. When this value B is placed in the obtained equation, we now obtain i * D 2 and thus D fc - 1 - 7 / ^ -,

The ratio ^ guarantees one of the important requirements for the implementation of the tool and allows the definition of a large D nominal value.

Find the snake next to the large "C" value.

Place the numerical values shown in the equation and obtain the value: 2.50 _ 100 _ _ D = --- = - = 220 nm.

.0.5 1 - 0.55 ~ 0.9 7 58602

When rounding the value thus obtained to the standard value, it can be seen that D = 250 ran.

Placing this value D in the equation gives BD φ g - _r___ 1 (D -21)? 1 and now we get the actual value: 20 - 250 · 0.5 _ 2500 _ „„, _ B1 = --------— = - = 18.4 im.

1 (250 - 100) · 0.9 136

Figure 5 now gives a large T _ Älot c ~ 'c 180 so C =%! <* · _ 180 (D - 21) «g 1

Placing the numerical values shown and the results obtained are finally obtained: „_ 50-90 250 · 40 · 0,5„ n _ C = - - - = jö rtm.

180 (250 - 100) * 0.9

Claims (1)

Claim 860602: A rotary cutting tool for machining with radially arranged flexible cutting elements made of pieces of wire of the same length, the inner ends of the wires being connected to each other and pressed laterally against each other to form a whole, and the outwardly pivoting ends converging freely. as a rotating surface of the cube, the ratio between the sum of the free end surfaces of the ends of the wire pieces on the cutting surface of the tool and the total cutting surface of the tool being 0.10 to 0.99, characterized by at least two groups (5 to 8; 14 to 15) of cutting elements (1) between the groups, near the tensioned ends, annular spacers (9, 10, 11; 16), the thickness and arrangement of which are such that the cutting surface (A) of the tool formed by the free ends of the cutting elements (1) has a curved cross-section corresponding to the surface of the workpiece to be machined n curvature and the cutting elements (1) are arranged along the line of contact of the surface to be machined so that in the free space they are perpendicular to this surface, whereby the annular spacers (9, 10, 11; 16) the approximate thickness (C) is defined by the formula DL cp C = L - - C (D - 2l) cj1, where Lc en is the cross-sectional length of the surface arc formed by the combined inner ends of the cutting elements; D is the diameter of the cutting surface of the tool, measured on its axis of symmetry; L is the length of the cutting surface of the tool in cross section; 1 en blade length; «F is the ratio between the killing of the end surfaces of the free ends of the pieces of wire on the cutting surface of the tool and the total cutting surface of the tool; ^ is the ratio between the killing of the end surfaces of the joined ends of the pieces of yarn and the total surface area formed by the end faces of these connected ends.