FR2500342A1 - CUTTING INSERT - Google Patents

Abstract

POLYGONAL CUTTING PLATE THAT HAS TWO FLATS 9 AND 13 BEHIND ITS CUTTING EDGE 7. THE SECONDARY FLAT IS LOCATED ABOVE THE CUTTING AREA AND PRESENTS A DESCENDING WALL 15 THAT JOINS A SLOPE BACKGROUND 7 WHICH EXTENDS TO THE CENTER PLATELET. THIS SLOPE BACKGROUND DESCENDS AT THE SAME TIME CLOSING TO THE CENTER OF THE WAFER AND AWAY FROM THE NEAREST CORNER PARALLEL TO THE SIDE OF THE WAFER.

Description

In metal machining operations, it

  has just removed the material as quickly as possible in order to minimize manufacturing and labor costs. To do this, you need a cutting insert that withstands significant stress and heat.

  their products at high speeds, advances and depth

  passwords required for rapid removal of material. These plates should also have a shape

  which minimizes the power required for operations

  machining by controlling the shape of the shavings pro-

  duits. In addition, since the operations do not all require the same speed, depth of pass or advance, the elements intended to drive the chips must be able to do so within as large an interval as possible.

these settings.

  Examples of attempts to resolve these problems

  The problems are given by the American patent 4 087 193 and the American patent application 181 965 filed on August 28, 1980. The aforementioned patent proposes an indexable plate

  having a flat cutting edge followed by an inter-

  median plane located below him. A secondary wall

  re descends from this intermediate plate to a flat bottom which is parallel to the plane containing the cutting edges. According to

  this patent, the edge formed by the Junction of the inter-

  middle and the secondary wall breaks the shavings

when they pass over it.

  The aforementioned patent application proposes an indexable plate having a flat cutting edge flat followed by a descending wall leading to a bottom which descends in

  approaching the back of the plate.

  The invention provides a cutting insert for serving

  severe defect which presents forms designed to drive chips and reduce power consumption in

  a wide range of cutting parameters.

  The insert of the invention comprises a cutting edge dish and an intermediate dish located behind and JeoA pUqpg CT * zTvpuooSe quld 0 * CI oTvupuooOe

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  inside and joins a secondary wall 15. This secondary wall 15 joins a bottom at its internal edge

  in slope 17. This bottom on slope 17 is symmetrical with respect to

  port to the bisector plans of the corner angles. One of these bisector planes corresponds to line B-B in FIG. 1. As shown in fig. 1, the sloping bottom 17 can join a flat bottom 19 preferably parallel to the plane

  formed by the cutting edges 7 At the center of the

  an opening 21 can be provided for receiving

  see a pin or locking screw.

  Fig. 2, which is a view in vertical section of the plate along line B-B, bisector plane of one of the

  corner angles of the plate, shows that the wall of the

  cendante 11 makes an angle with the plane formed by arS-

  13 cutting tones 7. This angle A is preferably from 10 to 120. The descending wall 11 joins the secondary plate

  13 making an angle B of 155 to 1700 with it.

  Fig. 2 also shows that the sloping bottom 17 makes

  an angle with a plane parallel to the plane of the cutting edges

  pantes. This angle D must be between 1 and 100. It can also be seen that the sloping bottom 17 comes closest to the secondary plate 13 in the corner area. Their minimum distance is shown in fig. 2 with the symbol X. Fig. 3 which is a vertical section of the plate made midway between the corners, shows that the sloping bottom

  17, moving away from the corner areas, descends parallel-

  ment to the cities of the plate until it reaches the flat bottom 19. The maximum variation in height H of the sloping bottom 17 of the area from the corner to the flat bottom 19 must

be 0.13 to 0.38 mm.

  The shape of the sloping bottom 17, Point at the angle C that

  make the secondary plate 13 and the secondary descending wall

  daire 15, contributes to the formation of a conical chip

  at very high speeds of advance and, thereby, to obtain

  tion of a consumption of power reduced to the minimum which is necessary in the machining of metals at high feed rates where the chip descends along the wall *. soep onb quos or ú TST 0e1 lnc n ** ouogy.ei guoTwmTTU9 sfo * Àm 9L60 'q 8C60 op oouop3pd * p oQjz 4Top X oouuquTp VI * 09T Oe 0T o * .ue sTudmoo * lle 4Top 0 lTUvaT' 4x uquTnepî op uoTu9jqoT Inod 'onb omTque uo 6r PuTTouT puo; eT OOAW qou4UOO UO 4UeTA ao T

Claims (8)

  1 - Cutting insert formed of a material body   hard wear resistant with a peripheral wall   that (3), an upper face and a cutting edge (7) formed at the junction of this peripheral wall and this upper face, the upper face having a flat   (9) extending inward from the curved arite   pante, a wall (11) which descends away from this dish inwards, a secondary dish (13) located inside this descending wall, a secondary wall (15) which descends while moving away from this dish secondary   inwards, and a bottom (17) which descends in distance   embedding this secondary wall inwards, the height   tor X of the secondary dish above the sloping bottom being from 0.38 to 0.76 mm.   2 - cutting insert according to claim 1, the body, seen from above, is of polygonal shape and the   sloping bottom descends away from the nearest corner   che of the polygonal body parallel to the sides of this latest.   3 - cutting insert according to claim 1, pre-   feeling moreover a flat background (19) which * extends towards the   térieur from the sloping bottom (17) and is oblique by compared to this one.   4 - cutting insert according to claim 1, on which the sloping bottom is oblique to the plan of the dish.   - Cutting insert according to claim 1, the upper face of which is polygonal and the cutting edge and the peripheral wall form the sides and the vertices of the polygon. 6 - Cutting insert according to claim 5, in which the height of the dish above the outermost end of the sloping bottom is minimal in the corners.   7 - cutting insert according to claim 1, on which the dish is substantially planar and the descending wall in part making an angle with it of 12 at 20-.   8 - cutting insert according to claim 7, on   which the secondary dish is substantially flat and feels   roughly parallel to the flat of the cutting edge, and the descending wall and the secondary flat make an angle of at 170-.   9 - cutting insert according to one of claims   1, 7 and 8, on which the difference in height between the highest point and the lowest point of the bottom in slope is 0.13 to 0.38 mm.   - Cutting insert according to claim 2, on which the sloping bottom is symmetrical with respect to the vertical plane passing through the bisector of the angle formed by the nearest corner.   11 - Cutting insert according to claim 1, on which the sloping bottom descends with a slope angle D from 1 to 10 @.