JPS5823566Y2 - Copying device for lead blade grinding - Google Patents

Description

[Detailed description of the invention] This invention is a lead that can accurately copy and grind the lead blade of a spiral end mill, etc., without the need for an indexing table or a change gear mechanism for lead feeding on a milling machine or tool grinding machine. This invention relates to a copying device for blade grinding.

In general, when grinding the cutting edge of an end mill for a milling machine, especially a spiral end mill with a lead edge, in a machine factory, a milling machine or tool grinder equipped with a change gear mechanism at the end of the machine table to control the rotation of the feed shaft is used. A disk is used, an indexing table is placed on it to support the end mill to be ground, and the rotating shaft of the indexing table and the feed axis of the table are interlocked via the changing gear mechanism. In order to set the rotation ratio between the two to the required value, the gear to be applied to the changing gear mechanism is changed to a gear having an appropriate number of teeth by calculation, thereby automatically and accurately grinding the gear.

However, this method not only requires time and skill to calculate and process the replacement gear, but also has the disadvantage of requiring a specific machine equipped with a replacement gear mechanism.

This invention was made in order to eliminate the above-mentioned disadvantages, and includes a support having a rotatable center member having a function in place of the indexing table, and a center member of the support which replaces the above-mentioned replacement gear mechanism. It is equipped with a copying mechanism equipped with a rotational motion imparting function.

This invention will be explained below based on the drawings of the embodiments.

In the figure, A shows the table of the milling machine, B shows the saddle, C shows the grinding wheel, and D shows the spiral end mill to be ground.

Although not shown, the grindstone C is attached to the blade attachment shaft of the milling machine and rotates at a fixed position independently of the table A.

1 is a support in which a center member 2, which will be described later, is rotatably and removably inserted and held; 3 is a pusher tip; between this pusher tip 3 and the center member 2 of the supporter 1, the end mill D to be ground is is horizontally rotatably supported at both centers on the table A.

The center member 2 to be attached to the support 1 has its body formed in the shape of a shaft with a required diameter and length, and has orthogonal grooves on the outer periphery of its front end at equally spaced positions in the circumferential direction. A large number of holes 2' are provided for determining the angle of rotation.

4 is a connector provided between the center member 2 and the shank portion D' of the end mill D supported by the center member 2;
It is formed into a cylindrical shape that can be externally fitted over both of the above, and is provided with set bolts 5 at both outer ends thereof so as to be able to integrally hold and connect the two, one of which is the set bolt. 5 is the rotation angle indexing hole 2 of the center member 2.
The end mill to be ground can be rotated and fixed relative to the center member 2 by a predetermined angle by performing a loose connection operation such that the end mill is sequentially repositioned and engaged with the center member 2.

Reference numeral 6 denotes a rotational motion imparting member attached in a crosswise manner to impart forward and reverse rotational motion to the center member 2 from the side,
It is formed of an elongated rectangular plate 1 and a guide arm 9 which is connected to one end of this plate 7 via a turnbuckle mechanism 8 so that its protrusion length can be adjusted, and has a horizontal guide roller 10 at its tip. A pair of coil spring plates 1 that are approximately the same length as the iron plate T are placed on the T.
1 are provided in parallel and fixed at mutually opposite ends, and are wrapped around the shaft of the center member 2 at the free ends of both coiled spring plates 11 in a hugging manner, and each end is secured with a set screw 12.
These coiled spring plates 11 hold and attach the plate γ in a cross-shaped movable manner.

Therefore, if the plate 1, that is, the rotation motion imparting member 6, is moved forward and backward in the longitudinal direction with respect to the center member 2,
By winding one side of the coil spring plate 11 and unwinding the other by the amount of movement, the center member 2 can be rotated in the forward and reverse directions.

Further, reference numeral 13 is formed into a substantially pistol-shaped plate whose one end is attached with a bolt 14 so as to be rotatable in the horizontal direction on the saddle B in order to allow the rotary motion imparting member 6 to move forward and backward as required. The guide member 13 is provided with a guide groove 13' that linearly engages and guides the guide roller 10 at the end of the rotational motion imparting section 6, and an arcuate hole 13'' that guides its rotation. A fixing bolt 15 is provided in the arcuate hole 13''.

The guide groove 13' can be set at a desired angle with respect to the moving direction of the table A, that is, the lead angle of the end mill to be ground, by loosely connecting the poles N4 and 15.

Therefore, when grinding the outer cutting edge of a spiral end mill or the like using the copying device of the present invention, the center member 2, which is rotatably held by the support 1 on the table A, is rotated by attaching it in an intersecting manner. Rotation of the applying member 6 is restricted by engagement with a guide member 13 provided on the saddle B to allow the member 6 to move forward and backward. Next, after fitting the connecting member 4 onto the end of the center member 2 and fixing it in engagement with one of the small indexing holes 2' using the set bolt 15, the center member 2 Center 3' of push button 3
The end mill D to be ground is rotatably supported between the two.

After that, the table A is raised and one of the cutting grooves of the end mill D is engaged with the grindstone C located above the table A.
In this state, the end mill D is connected to the connecting member 4 using the set bolt 5.

After doing this, when the table A is gently moved in its longitudinal direction, the end mill D rotates with respect to the grinding stone C by the lead amount of its cutting edge. The connected center center member 2 is rotated,
At the same time, the rotation motion imparting member 6 attached to the center member 2 is moved in the horizontal direction, and the guide member 13, which is engaged with the guide roller 10 at the tip thereof, is moved in the required direction with respect to the moving direction of the table A. Rotate and position to match the lead angle.

That is, by performing the above operation, the guide member 13
can be automatically set to a required angle, and here the guide member 13 can be fixed with the fixing bolt 15.

In addition, during actual grinding, the rotational motion imparting member 6 is caused to perform a predetermined forward and backward movement by the guide member 13 set above,
The center member 2 and the end mill D to be ground are caused to perform forward and reverse rotation operations by an amount corresponding to a required lead angle.

In addition, repositioning or indexing of each cutting edge with respect to the grinding wheel C can be easily performed by operating the connecting member 4 and its set bolt 5, and furthermore, when grinding the side surface of the cutting edge groove, the rotating operation described above can be performed. Any desired depth of cut can be obtained by changing the protruding length of the guide arm 9 by operating the turnbuckle mechanism 8 of the applying member 6.

Since this device is constructed as described above, the rotational movement of the endmill to be ground, which is performed when the table is moved when grinding the lead blade of the endmill to be ground, etc., is performed by the copying mechanism consisting of the above-mentioned guide member and rotational movement imparting member. Moreover, the installation of the guide member can be done extremely easily and accurately by setting the angle using the grinding wheel and the cutting groove of the end mill to be ground. This is an effective idea that allows this type of grinding work to be carried out quickly and accurately without requiring any special skill or skill.

[Brief explanation of drawings]

The drawing is a perspective view showing an embodiment of the copying device for grinding a blade according to the present invention. 1.3 is a support, 2 is a center member, 2' is a rotation angle indexing hole, 4 is a connecting fitting, 6 is a rotational motion imparting member, 8 is a turnbuckle mechanism, 9 is a guide arm, 10 is a guide roller,
11 is a coiled spring plate, 13 is a guide member, and 13' is a guide groove.

Claims (1)

[Scope of utility model registration request] An end mill to be ground, etc. and a center member are mounted between the supports on the machine table, and a cylinder is installed between the center member and the shank of the end mill that is supported by the center member, so that it can be fitted externally and spans both. one of the set bolts is sequentially engaged with a rotation angle indexing hole that is formed in a shape and has set bolts at both ends of one side thereof, and is drilled in a number of rotation angle indexing holes in the direction of the outer circumference of the end of the rotatable center member. a connecting member that allows the end mill to change the positioning of each cutting edge; and a shaft portion of the rotatable center member for imparting a required rotational movement to the rotatable center member from its side. A pair of coil spring plates of the same length are fixed at one end to each other and wound in opposite directions, and the other ends of the coil spring plates are integrally held at both ends, and the tension is attached in a crosswise manner to the shaft. is,
a rotational motion imparting member having a guide arm with a guide roller attached to one end of a plate-like member capable of causing the center member to rotate in forward and reverse directions by the amount of movement during the forward and backward movement; A fixed body near one side of the table, for example, is placed and fixed horizontally on a saddle at an appropriate height in order to cause the rotational motion imparting member to perform the required forward and backward movement, and the guide roller is moved by the table. A copying device for grinding a lead blade, comprising a guide member that is provided with a guide groove that guides the user in a predetermined angular direction during movement, and whose mounting angle is variable.