JPS6322041Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The disclosed technology belongs to the technical field of end support during recutting of an end mill cutter of a tool grinder.

Therefore, this invention is a press-type end support used when re-grinding the end face of an end mill cutter with a single center hole when there is no sensor hole on one end face, such as the end face of the cutting edge of the end mill cutter of a grinding machine. It is a device-related device, in particular, a cylindrical guide with a circular cross-sectional tapered surface for automatic centering with respect to the end surface, and a flat center that abuts the end surface of an end mill cutter etc. concentrically with the tapered surface inside the guide. This invention relates to an end support device for an end mill cutter that is freely provided at the tip of a tapered surface and supports the end mill cutter reliably in a pressing manner.

<Prior Art> As is well known, machining of metal products includes grinding, and end mill cutters are widely used for this grinding.

The grinding of the outer peripheral cutting edge by the end mill cutter is performed in a manner in which the end mill cutter is fixed in the axial direction. This was done by supporting the shank 2 of the cutter 1 and the centers 5, 5 for the center holes 4, 4 provided at the center of the end face of the cutting blade 3.

However, when the cutting edge 3 is partially damaged and the center 5 on the cutting edge 3 side is missing, re-grinding of the peripheral surface of the end mill cutter 1 is performed as shown in FIG. This was done by clamping the shank 2 with a predetermined collection chuck 6.

<Problems to be solved by the invention> However, since the support by the collect chuck 6 is a kind of cantilever support, if the end mill cutter 1 is concave and long, it will be deflected in the axial direction. As a result, there are drawbacks such as poor accuracy in re-grinding, and in the case of small-diameter and long end mill cutters, there are problems such as cracks occurring during re-grinding, and in the case of small-sized end mill cutters, centering There was a problem that it was not accurate.

Therefore, for example, it is possible to use a technique such as a turning body support device devised in Japanese Utility Model Application Publication No. 52-57387, but it is also possible to use such a technique to support the end mill cutter when re-grinding the outer periphery of the end mill cutter. If grinding is performed using only the concave center, there is a problem in that the grinding wheel for the end of the end mill cutter interferes with the concave center, making it impossible to sufficiently re-grind the end of the end mill cutter.

<Purpose of the invention> The purpose of this invention is to solve the problem when the end mill cutter of the grinding machine based on the above-mentioned conventional technology cannot be supported by the center due to the lack of a center hole due to cutting edge damage during re-grinding. The problem of support for the end mill cutter is a technical issue that must be solved, and the machine manufacturing industry will be improved by ensuring that the side lacking the center hole is also centered and the end faces of both ends are supported reliably. It is an object of the present invention to provide an excellent end mill cutter end support device that is useful in the field of processing technology used in the industry.

<Means/effects for solving the problems> In order to solve the above-mentioned problems, the structure of this invention, which is based on the scope of the above-mentioned utility model registration claims, is to solve the above-mentioned problems. When re-grinding the end mill cutter when the center hole is missing and the end face cannot be supported by the center, the center is brought into contact with the center hole in the same way as before for the end face on one side. Centering can be performed automatically by supporting the end surface of the end supporting device, and bringing the end surface of the side lacking the other center into contact with the tapered surface of the front part of the guide of the end support device. , a flat center is coaxially coaxial with the tapered surface relative to the guide, and is relatively advanced to the back thereof, and the flat center is supported in surface contact with the end face of the end mill cutter on the side where the center hole is missing; By keeping this state fixed and rotating the end mill cutter about the center on one side and rotating the flat center about the guide, the end mill cutter can grind the outer peripheral surface while reliably maintaining its supporting rigidity. This was achieved by taking technical measures to

<Example> Next, an example of this invention will be described below based on the drawings from FIG. 3 onwards. Note that the same parts as in FIGS. 1 and 2 will be described using the same reference numerals.

The illustrated embodiment is a support mode in which the end mill cutter 1 has a center hole 4 on the end face of the shank 2, and the end face on the cutting edge 3 side lacks the center hole 4. The end mill cutter 1 is supported by an end support device 7 on the shank 2 side.
A set bolt 10 is screwed into a casing 9 screwed into a recess of the holder 8, and the tip thereof moves forward and backward with respect to the holder 8 and abuts against a housing 11 having a center 5. ing.

On the other hand, what is shown in FIG. 4 is an end support device 12 that constitutes the gist of this invention, and supports the cutting edge 3 side of the end mill cutter 1 in this embodiment where the center hole 4 is missing on the other side. The holder 13 is located on the same axis as the center 5 of the one end support device 7, and has a fixed set stroke on the outside through a resilient spring 14, and a guide with a circular cross section. 15 is the front-back direction, and
It is fitted so as to be slidable in the rotational direction.

Further, the holder 13 is restricted in forward and backward movement, but is rotatable, and is relatively rotatable with respect to the guide 15, and is relatively free to move forward and backward. A flat center 16 is provided on the front flange.

The holder 1 is placed in front of the guide 15.
A centering tapered surface 17 is formed concentrically with the guide 15, and its inner end is guided to the flat center 16, and the front end surface of the guide 15 is formed with a stepped portion 18 as shown in the figure. When re-grinding the end mill cutter 1, the grindstone and guide 1 (not shown)
It is designed to avoid interference with 5.

Furthermore, an L-shaped hook groove 1 is provided at the rear of the guide 15.
9 is formed to engage with a pin 20 implanted and fixed in the holder 13, and the guide 15 can be freely slid in the axial direction in the axial direction portion of the L-shaped hook groove 19. Movement in the front and rear directions is restricted at the direction portion.

In the above configuration, the end support device 7 on the shank 2 side of the end mill cutter 1 and the cutting blade 3
The side end support devices 12 are provided on the same axis, and the set bolts 10 of the end support devices 7 are moved back to move the center 5 together with the housing 11.
On the other hand, the guide 15 of the end support device 12 on the side of the cutting blade 3
Manually engage the axial groove of the L-shaped hook groove 15 with the pin 20 of the holder 13 and push it in against the elastic spring 14, then move the specified end mill cutter 1 as shown in FIG. Insert it between the two and insert it into the center hole 4 on the end face on the shank 2 side.
The end mill cutter 1 is brought into abutment engagement with the center 15 of the end support device 7, and the other end support device 12 is pushed forward by its elastic spring 14, so that the end mill cutter 1 is freely attached to the tapered surface 17 at its tip. cutting edge 3
Insert and engage the end faces of.

Therefore, when the set bolt 10 of the end support device 7 is rotated to push the center 5 along with the housing 11 toward the end support device 12, the end mill cutter 1 is also pushed forward, and its cutting edge 3 side is pushed forward. When the end face is in the state shown in FIG. 5, that is, in a free play state with respect to the tapered surface 17 of the end support device 12, the entire circumference of the end surface of the cutting edge 3 comes into contact with the tapered surface 17 as shown in FIG.

Note that by rotating the set bolt 10, the center 5
When you push forward, the cutting blade 3 of end mill cutter 1
The end face of the guide 15 is centered on the tapered surface 17 of the guide 15 via the tapered surface 17.
The cutter blade itself also slides into the holder 13 against the elastic spring 14, and as a result, the end face of the cutting blade 3 comes into contact with and is supported by the front end face of the flat center 16 provided in the holder 13. Become.

Therefore, when the guide 15 is manually pushed forward and the guide 15 is manually rotated when the pin 20 reaches the bent part of the L-shaped hook groove 19, the pin 20 is moved in the axial direction of the L-shaped hook groove 19. The guide 15 stops moving in the axial direction by relatively engaging with the circumferential portion of the guide 15, resulting in the state shown in FIG.
In addition, the end face of the cutting blade 3 is supported at both ends by the flat center 16.

Therefore, when the outer periphery is re-grinded as per the conventional method, the end mill cutter 1 has surface contact between the center hole 4 and center 5 on the end surface on the shank 2 side, and surface contact on the end surface on the cutting edge 3 side. The flat center 16 is changed from being rotatable with respect to the holder 13 to being rotatable with respect to both end support devices 7 and 12, and its supporting rigidity is maintained, regrinding of its outer periphery is reliably performed, and long There is no horizontal deflection or vibration, and regrinding accuracy is reliably maintained.

It goes without saying that the embodiment of this invention is not limited to the above-mentioned embodiments, and various embodiments may be adopted, such as adding an appropriate high-friction material to the facing end face of the flat center cutting blade. be.

Furthermore, even if the shank side lacks a center hole, it is possible to provide end support devices having flat centers for both ends.

<Effects of the invention> As described above, according to this invention, even when re-grinding an end mill cutter when the end face of the end mill cutter lacks a center hole for the center, the end mill cutter can be converted into a cantilever type. Because it can be supported reliably at both ends without any support, the support rigidity is maintained at both ends regardless of the diameter, length, etc. of the end mill cutter, and it also prevents bending and chatter of the end mill cutter. First, the excellent effect of improving the re-grinding accuracy is achieved.

By forming a centering end support on the surface of the guide facing the end face of the end mill cutter lacking a center hole, an excellent effect is achieved in that the end support device for the end face lacking a center hole can automatically center the end face, even if the other end face has a center hole center similar to the conventional type.

The tapered surface provided on the guide concentrically with the tapered surface is movable relative to the guide, so that the tapered surface reliably contacts and supports the end surface of the missing center hole. The excellent effect of being able to do this is achieved.

In addition, since the flat center is rotatable relative to the guide, the end mill cutter has the advantage that the outer circumferential surface grinding action can be performed reliably without any problems as in the conventional method.

Since the guide is rotatable relative to the tapered surface, the end mill cutter can be set to the end support device in a one-touch manner, which is an excellent effect.

Since a flat center is provided at the back of the tapered surface of the guide concentrically with the tapered surface, the grinding wheel is supported by the tip of the end mill cutter and the flat center, and the grinding wheel is moved to the tip of the end mill cutter. This has the excellent effect of conveying the information to the department.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of a conventional end mill cutter with support at both ends, Fig. 2 is a partial side view of a cantilever type support for a conventional end mill cutter, and Fig. 3 and subsequent figures are one implementation of this invention. FIG. 3 is a longitudinal cross-sectional view of an end support device with center support having one center hole; FIG. 4 is a partial cross-sectional view of the end support device with respect to the end surface on the side where the center hole is missing; FIG. Figures 5, 6 and 7 are partial vertical sectional views illustrating the setting of the end mill cutter end support device. 1... End mill cutter, 7, 12... End support device, 17... Tapered surface, 15... Guide, 16... Flat center.

Claims (1)

[Scope of utility model registration request] In a press-type end support device used when re-grinding the end face of an end mill cutter, a flat center is placed concentrically with the tapered face at a deep part of the tapered face within a guide having a tapered face centered with respect to the end face. An end mill cutter end support device, characterized in that the end mill cutter is installed so that it can move forward and backward and rotate freely.