JPH0621608Y2 - Side cutter for finishing groove width - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of Invention] <Industrial Application Field> The present invention provides a plurality of cutting edges for finishing cutting a groove width such as a groove on the inlet side of a T groove to a predetermined size. Related to the side cutter for finishing the groove width of rotary tools.

<Problems to be solved by the prior art and the invention> Among the conventional side cutters for groove width finishing, as shown in Japanese Utility Model Publication No. 58-13918, a groove in which rough groove processing has been completed in advance is transferred from medium finish to finish in one pass. The cutter attachment method of the cutting cutter that gradually widens the groove width and processes the groove width is to fix the throw-away tip with Sarabis in the thickness direction of the side cutter body. The problems of the conventional example due to this mounting method are that the cutter body itself must be thin, especially when the groove width is narrow, and a) At least the thickness of the chip to be mounted, that is, the arrangement is in the same phase in the radial direction. If both sides have the same position on both sides in the same direction, the chip thickness of two pieces is cut in the thickness direction of the main body if the same phase in the radial direction and the position in the circumferential direction are staggered. I hate because it keeps the rigidity of the body itself. In addition, since the chip is fixed in the thickness direction of the main body with a screw, it may not be possible to tighten it by an effective screw length, and although it can be mounted, the tightening force cannot be maintained, which is a safety problem. (Refer to Fig. 8 and 9) b) If a thin tip is used to secure the thickness of the cutter body, the tip strength will be insufficient and the tip itself will be tightened with a mounting hole. Sometimes, the flat part was damaged during tightening. (See Fig. 10) c) When the size of the cutter is the same, each cutting edge is surrounded by the number of cutting edges and it is advantageous to cut in the same phase on the left and right cutting edges to increase the cutting feed rate. In many cases, it is often installed at the same position on both sides. At that time, the tips are directly attached with Sarabis, but the phases are shifted so that the screw holes intersect and each tip gradually expands to the finished width and partially wraps the cutting edge in the radial direction. Because of the mounting, especially when the thickness of the cutter body is not enough, the screw hole depth of each chip set is different, so when the set position and the salvis used there are not the same, the left and right screw bottom intersections However, there was a drawback that the chips would not be tightened with the screws and the finish of the groove width would become unstable, or the screws would be forcibly tightened and the chips and screws would be damaged or the screw holes would be damaged. (See Figs. 9 and 10) d) As the cutting edge of the conventional groove width, the tips are arranged separately from both sides in the same thickness in the thickness direction of the cutter body in the same phase as the cutting width, so Many, especially the final finishing cutting blade and the intermediate finishing cutting blade immediately before it, require high precision at their mounting points, making the cutter body difficult to manufacture and spending a lot of time manufacturing. It was The fact that there are many tip mounting points by the methods of (e) and (2) makes it difficult to secure the accuracy of the tip mounting surface on the cutter body, and the position and shape accuracy of the cutting edge of the tip relative to its manufacturing reference surface Due to variations and the like, the cutting edge fell and was uneven, which made the finished surface unstable and making it difficult to increase the cutting feed rate. Since the above-mentioned problems have occurred in the conventional type, the purpose of the present invention is to adopt the tip set in the thickness direction of the cutter body from both sides in the conventional groove width finishing cutter in the present invention. By setting the cutter from the outer peripheral surface in the radial direction, even if the thickness of the cutter body is not sufficient due to the groove width (narrower than 20 mm), the rigidity of the cutter is prevented from decreasing and the tip tightening force is secured. It is possible to halve the number of chips to be attached and simplify the manufacturing of the cutter body compared with the conventional one, and by improving the blade shape of the finishing cutting edge, stable cutting is possible at low cost and high cost. It is to provide an efficient groove width finishing cutter.

[Structure of Invention]

<Means for Solving the Problems> In order to achieve the above-mentioned object, the present invention has a plurality of pairs of cuts arranged on the outer peripheral portions of both side surfaces of the groove width finishing side cutter body so as to gradually expand to the finishing width. In a side cutter for finishing the groove width, in which the blades are provided and the cutting blades partially wrap each other in the radial direction, of the cutting blades, at least the finishing cutting blades should be attached to the outer peripheral portions of both side surfaces. It is a side cutter for finishing the groove width, which has a cutting edge with left and right cutting edges integrated and is tightened in the radial direction from the outer peripheral surface, and has a radius R and its center on the left and right rake surfaces of the finishing cutting edge. Is a side cutter for finishing groove width, which is characterized in that a convex curved surface formed on the side opposite to the rotating direction of the cutter is provided.

<Operation> Since the present invention is configured in this way, especially when the width of the groove is narrow and the thickness of the cutter body is not enough, it is not necessary to make a notch for attaching the throw-away tip in the thickness direction. The rigidity of the cutter can be increased, and the number of chips that can be attached is 2
The number of cutting blades required for one piece is sufficient, and the number of cutting edges is small, and since mounting from the outer peripheral surface in the radial direction can be done with a wedge piece and a screw with a sufficient depth of mounting screw, the final cutting blade. It is possible to attach the tip in a stable manner, which is especially required for the finishing, and for the finished surface, a convex curved surface with a radius R and the center of which is on the opposite side of the cutter rotation direction is provided on the left and right rake surfaces of the finishing cutting edge. Since it is provided, it is possible to obtain a stable finished surface.

<First Embodiment> One embodiment of the present invention will be described with reference to FIG. The cutting blades are all mounted according to the present invention, and the wedge 2 and the screw screw 3 shown in FIG. 2 are installed in the chip set grooves A to U (hereinafter referred to as grooves A to U) provided on the outer periphery of the cutter body 1. Use the chip 4 of FIG. 4 in the grooves A to T, and the fifth chip in the groove U.
The chip 5 in the figure is set in the radial direction from the outer peripheral surface. The tip 4 and the tip 5 each have a cutting edge 6 on the left and right as shown in FIGS. 4 and 5, respectively, and a reference B surface 8 and a reference C.
The dimensional accuracy of the left and right cutting blades 6 and the outer peripheral direction is controlled so that the surface 9 can be fitted to the reference A surface 7 of the cutter body 1 shown in FIG. 2 and the reference D surface 12 shown in FIG. 3, respectively.
The left and right cutting edges 6 of the tip 4 are manufactured at right angles to the reference C surface 9, two niger surfaces 10 and four corner chamfers 11 are formed. The width of the cutting edge width 18 differs depending on the mounting and setting groove, and is arranged so as to gradually expand to the grooves A to U, as shown in FIG. 1, partially lapped in the radial direction and set with a phase shift. The tip 5 set in the groove U serves as a finishing cutting edge and has the maximum width dimension. That is, the reference width β is the same for all the chips mounted in the grooves A to U, but the size α of the reference B8 and the cutting edge 6 of each chip shown in FIGS.
Is gradually expanded to the grooves A to U similarly to the cutting width 18.
Grooves A to U provided on the outer periphery of the cutter body 1 shown in FIG.
Is provided with a slope 15, a screw hole 16, a reference D surface 12, and a reference E surface 13, and a clearance groove is provided on the reference D surface 12 and the reference E surface 13 so that the chips 4 and 5 can be stably attached. There are fourteen. Also reference D
From the surface 12, the center 17 of the cutter body 1 shown in FIG.
The dimension up to that is gradually reduced from the dimension in the groove A from the groove B to U, and the dimension value in the groove U is the minimum dimension. The tip 4 shown in FIG. 4 is set up to the grooves A to T as described above, and the machining is used for finishing the groove after rough machining in advance. The tip 5 of FIG. Radius R (example
(150 mm) with a convex curved surface, set in the groove U and used as a finishing cutting edge. In the groove width finishing cutter configured as described above, the left and right cutting blades are integrated, so that the chips 4 and 5 can be easily managed, and the number of chips to be mounted is reduced by half compared with the conventional one. In addition, compared with the conventional method in which a hole is provided in the chip and the chip is directly mounted, a thick screw can be used in the present embodiment, so that stable chip mounting is possible. In particular, for processing with a narrow groove width, it is possible to manufacture without cutting the rigidity of the cutter body 1, so that highly efficient processing is possible,
Furthermore, on the finishing surface, a rake face is used as a cutting edge for final finishing.
Since a blade shape with a convex curved surface on 19 was adopted, a stable surface could be obtained.

It should be noted that by removing all the chips set in the grooves A to U and replacing the chips with different cutting edge widths 18 (without changing other dimensions), the same cutter body has different groove width dimensions. Can be easily processed.

<Embodiment 2> This will be described with reference to FIG. The present embodiment shows a modification of the first embodiment, and the groove width finishing cutter 1'is only the final finishing cutting blade 20 and the intermediate finishing cutting blade 21 immediately before it as the cutting blades to be mounted in the radial direction from the outer peripheral surface. The other cutting edges are the ones in which the throw-away tips 22 to 27 are set from both sides in the thickness direction in the same way as before with Saravis 28 as shown in FIG. 7, and the cutting edge for finishing has a stable finish. It employs the chip 5 shown in FIG. 5 which is particularly effective in obtaining the same.
Even if the cutter body is thick and the prescribed rigidity can be maintained even with the conventional cutting blade mounting method as in this example, the cutter body production cost and the number of chips to be mounted are the same as before, but the throw-away tip 22 to 22 Since the square type insert capable of changing the four-corner cutting edge can be used for 27, this is an embodiment in which the tool cost can be reduced.

<Effects of the Invention> As described above, in the groove width finishing cutter of the present invention, the conventional left and right cutting blades are integrated and the chips are mounted in the radial direction from the outer peripheral surface, so the number of chips can be reduced by half. This is effective in management, and the production of the cutter body is easy and the production cost is reduced. In particular, since the width of the groove is narrow, when the thickness of the cutter main body cannot be sufficient with the conventional attachment of the cutting blades from the left and right, the rigidity of the cutter main body is secured and stable attachment can be achieved. As for the cutting surface, by adopting the shape of the tip 4 shown in FIG. 4 as the shape of the cutting edge, more stable cutting becomes possible, and in particular, as a finishing cutting edge, the rake face is improved as shown in FIG. Chip 5 shown in
When attached, more stable cutting and finished surface could be obtained, and production efficiency could be increased. In addition, it was possible to have the flexibility of finishing different groove widths by simply exchanging the chips while leaving the cutter body as it is.

[Brief description of drawings]

FIG. 1 is an embodiment of the present invention, which is a view of a side cutter for finishing groove width, which has cutting blades which are integrally formed on the left and right sides and is attached from an outer peripheral surface in a radial direction. FIG. 2 shows the chipset grooves A to T of FIG.
In the detailed view of the chip set up to here, in the case of the chip set groove U, the chip 5 is set at the chip 4. FIG. 3 is a view showing a chip set groove obtained by removing the wedge 2, the screw screw 3 and the chip 4 from FIG. FIG. 4 is a view of a tip shape used for the cutter according to the present invention. FIG. 5 is a diagram showing the shape of a tip having a finishing cutting edge used in the cutter according to the present invention. FIG. 6 is an embodiment of the present invention, and is a diagram of a side cutter for finishing the groove width, in which only the cutting blade 20 for finishing and the cutting blade 21 for intermediate finishing just before it have left and right integrated cutting blades. FIG. 7 is a detailed view of the cutting edge 27 of FIG. FIG. 8 is a chip mounting view of a conventional groove width finishing cutter, a diagram when left and right pairs of chips are at the same position in the circumferential direction, is a diagram when left and right pairs of chips are not at the same position in the circumferential direction, "
"(A) is a partial side view when the left and right pairs of chips are in the same position in the circumferential direction, (B) is a cross-sectional view of the left and right pairs of chips in (A), and (C) is a side view of the left and right pairs of chips. Side view when not in the same position in the direction, (D) is a cross-sectional view of a pair of left and right tips in (C), and FIG. 9 is a tip mounting view of a conventional groove width finishing cutter, when the groove width is narrow. In the example, the screw depth is not enough and the bottoms intersect.Figure 10 shows a partial side view of the conventional side cutter: 1 ... cutter body, 2 ... wedge, 3 ... screw screw, 4 ...
Tip, 5 ... Tip, 6 ... Cutting edge, 7 ... Reference A surface, 8 ... Reference B surface, 9 ... Reference C surface, 10 ... Negative surface, 11 ... Square chamfer, 12
... Standard D surface, 13 ... Standard E surface, 14 ... Negative groove, 15 ... Gradient diagram,
16… Screw hole, 17… Center, 18… Cutting edge width, 19… Cake face, 20
… Finishing blade, 21… Medium finishing blade, 22 to 27… Throw-away tip, 28… Saravis, 29… Set groove, 30… Cutting edge width, 31… Angle. A to U ... Chip set groove, α ... Dimensions, β ... Reference width.

Claims (1)

[Scope of utility model registration request] 1. A plurality of pairs of cutting blades are provided on the outer peripheral portions of both side surfaces of a side cutter main body for finishing groove width so as to gradually expand to the finishing width, and the cutting blades mutually extend in the radial direction. In the side cutter for finishing the groove width that is partially wrapped, at least the finishing cutting edge of each cutting edge has a cutting edge that integrates the left and right cutting edges that should be attached to the outer peripheral parts of both side surfaces. Tighten more in the radial direction, and make a radius R on the right and left cutting edge rake faces of the finishing cutting edge.
And a groove width finishing side cutter characterized in that a convex curved surface whose center is on the side opposite to the rotation direction of the cutter is provided.