JPS6135372Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention eliminates the need to adjust the vertical movement of the machine tool table on which the workpiece is placed or the spindle on which the cutter is attached, even if the height of the workpiece changes. This invention relates to a milling cutter that can easily obtain a milling cutter that is suitable for the height of the material and can perform efficient work.

Conventionally, when milling requires a step in the workpiece, or when processing workpieces of different heights, the table or spindle of the machine tool is moved up and down to align the cutter with the workpiece surface. There is. However, in this case, fine adjustment for dimensioning requires considerable skill and is very time-consuming, and is difficult to make when machining workpieces with steps or several types of workpieces with different heights. The reality is that the time required for fine-tuning the dimensions using measuring instruments greatly increases processing costs.

This invention was made to solve the problems mentioned above.The milling cutter, which was conventionally molded in one piece, has a cutter body that can be attached to a machine tool, and it can be easily fastened to the cutter body. The annular body can be divided into two parts, and an appropriate number of grooves for attaching the spacing pieces are provided on the annular body attachment surface of the cutter body and the attachment surface of the annular body, and the grooves are prepared in advance with different thicknesses. Select one of the desired thickness from among the spacing pieces, insert it into the groove, and then fix the two divided bodies together.
This milling cutter aims to solve the above-mentioned problems by freely obtaining a milling cutter with a height of L ₁ from .

The present invention has a mounting shaft hole and a mounting hole for mounting on a machine tool, a cylindrical or cylindrical boss protruding from the center of one side, and an annular body mounting surface provided at a position perpendicular to the mounting shaft hole. The cutter body has a required number of screw holes for connecting the annular body at predetermined positions on the mounting surface, and the fitting hole that fits into the boss of the cutter body and the cover provided in correspondence with the annular body mounting surface. A concave groove for fixing a plurality of spacing pieces on the mounting surface of the annular body, which has connecting bolt engagement holes that correspond to the mounting surface and the screw holes, and a desired number of chips are fastened at predetermined positions on the outer circumference. At the same time, spacer piece seating grooves are formed on the mounting surface of the cutter body at positions corresponding to the spacer piece fixing grooves, and spacer pieces of a desired thickness that are fixed between these grooves are attached. This is a milling cutter that allows the height of the cutter to be changed arbitrarily.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

What is shown in Figures 1 to 7 is an embodiment of the present invention. In the figures, 1 is the cutter body, and in the center thereof there is a shaft hole 11 for attaching it to a machine tool (not shown) and around it. Multiple mounting holes 12, 12
₁ , a keyway 13 is formed in the center of the upper surface, and a cylindrical (or cylindrical) boss 14 with a diameter of D is protruded from the center of the lower surface. Further, a mounting surface 15 for the annular body is provided on the lower surface of the main body around the boss portion 14, and a plurality of annular body connecting screw holes 16 are provided in the mounting surface 15 at regular intervals in the circumferential direction and parallel to the axial direction of the main body. It is set up.

It should be noted that if a circumferential band-shaped slotted groove is formed approximately at the center of the annular body mounting surface 15, the annular body can be attached to the mounting surface 15.
This is advantageous because it improves adhesion when adhering to the surface.

Reference numeral 17 denotes spaced single-seating grooves provided at several locations on the annular body mounting surface 15, with openings on the outer peripheral side in the radial direction of the cutter body 1 and walls on the shaft hole side.

Reference numeral 18 denotes an adjustment screw hole provided between the spacer single seating concave groove 17 and the groove 17.
If these are integrated through the spacer piece 3, a gap will be created in the area excluded by the spacer piece 3, and depending on the application in which this milling cutter is used, chattering may occur. It is preferable to use an adjustment bolt (not shown) to press the intermediate point between the groove 17 and the groove 17 so that vibrations will not occur and smooth cutting can be performed.

Reference numeral 2 denotes an annular body having tips 5 arranged at predetermined positions on the outer periphery of the lower surface at equal or unequal intervals, and a boss portion 14 having a diameter D of the cutter body 1 is fitted in the center of the annular body 2. A fitting hole 21 is provided, a mounting surface 22 that is in close contact with the annular body mounting surface 15 of the main body, and a spacing piece fixing groove 23 corresponding to the spacing piece seating groove 17 of the main body 1 are provided.

Incidentally, it is preferable to provide a spacing piece mounting screw hole 24 in the bottom surface of the spacing piece fixing groove 23 for use when the spacing piece 3 is fixedly used. Reference numeral 25 denotes a connecting bolt engagement hole, which has a large diameter through hole 26 that allows the head 41 of the connecting bolt 4 to pass therethrough, and a stepped through hole 27 that prevents the bolt head 41 from coming off in an arc shape in the circumferential direction. , and are provided in a keyhole-like manner.

Reference numeral 3 denotes a spacer having an appropriate thickness t, and the spacer 3 is provided with a notch 32 corresponding to the connecting bolt engagement hole 25 of the annular body 2 and a countersunk screw through hole 31 corresponding to the spacer mounting screw hole 24.

The connecting bolt 4, which is temporarily fastened to the screw hole 16 of the cutter body 1 attached to the spindle of a machine tool (not shown), is in a state with enough room for engagement with the annular body 2, and the head 41 of the connecting bolt 4 is attached to the annular shape. The bolt 4 is engaged with the large diameter through hole 26 of the body 2 and rotates the annular body 2 in a counterclockwise direction (the direction opposite to the rotation of the cutter).
When inserted into the stepped through hole 27, the head 4 of the bolt 4
1 and the shoulder of the stepped through hole 27 are in contact with each other and the annular body 2
is suspended from the cutter body 1, making it easier to replace the spacing piece 3.

With the above-described configuration, the present invention can be used when machining workpieces with steps or when machining workpieces with different heights. Select equal spacing pieces 3, loosen the connecting bolt 4 at a position where the milling cutter is away from the workpiece, insert the spacing pieces 3 into the grooves 17, 23, and then tighten the cutter body 1 with the connecting bolt 4. By integrating the annular body 2 with the annular body 2, there is no need to adjust the height of the spindle or table of the machine tool for dimensioning, and it becomes possible to start machining immediately, thereby increasing work efficiency.

[Brief explanation of the drawing]

The figures show examples of the present invention.
Figure 1 is a cross-sectional front view of the cutter body and annular body assembled, Figure 2 is a front, bottom, and side view showing the spacing piece, and Figure 3 is the cutter body cross-sectionally taken along line X-X in Figure 4. Figure 4 is a bottom view of Figure 3, Figure 5 is a plan view of the annular body, Figure 6 is a front view taken along Y-Y in Figure 5, and Figure 7 is a side view of the groove. It is a diagram. Reference numbers in the drawings: 1...Cutter body, 2...Annular body, 3...Spacer piece, 4...Connection bolt, 5...Tip.

Claims (1)

[Scope of utility model registration request] It has a mounting shaft hole and a mounting hole for mounting on a machine tool, a cylindrical or cylindrical boss protrudes from the center of one side, and an annular body mounting surface is provided at a position perpendicular to the mounting shaft hole. A cutter body with a required number of screw holes for connecting the annular body at a predetermined position, a fitting hole that fits into the boss part of the cutter body, a mounting surface provided corresponding to the annular body mounting surface, and a corresponding mounting surface. A concave groove for fixing a plurality of spacing pieces is provided on the mounting surface of the annular body, which has connecting bolt engagement holes corresponding to the screw holes, and a desired number of chips are fastened at predetermined positions on the outer periphery; By forming spacing piece seating grooves on the mounting surface of the cutter body at positions corresponding to the spacer piece fixing grooves, and attaching spacer pieces of desired thickness that are fixed between these grooves. A milling cutter characterized by the ability to change the height of the cutter arbitrarily.