JPS63191513A - Built-up gear hob with lever - Google Patents

Abstract

PURPOSE:To make needless the swing adjustment needed so far when attached fo a hobbing machine so as to shorten the preparation time at the time of tool exchange and improve the accuracy in mounting by providing levers to be supported by the hobbing machine on both ends of the main body mounted with a blade. CONSTITUTION:Plural engaging grooves parallel with the axis center are provided along the periphery of a column-shaped hob main body 12 and a blade 13 engages with it freely in mounting/removal and its both ends are fixed with rings 14 so that it may not move in the axis and radial direction to the hob main body 12. Lever parts 15, 16 are provided at both ends of the hob main body 12 and the lever part 15 consists of a taper part 17 to be engaged with the main metal part of a hobbing machine, a puller part 18 to be pulled in the arrow direction to push the taper part 17 against the main metal side taper face and a V-groove part 19 to be caught with a robot arm, etc. The lever part 16 is provided with a taper to be engaged with the end metal of the hobbing machine and its motion in the radial and axis direction is restricted by pushing the end metal against the hob main body 12 side.

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to an improved assembly hob.

<Prior art> Fig. 4 shows a conventional assembled hob. The assembled hob 1 includes a cylindrical hob body 2 and a blade 3 on the outer periphery thereof. A hob arbor 4 is inserted into the hob body 2.
Handles 5 and 6 are provided at both ends of the handle. The hob body 2 provided with the blade 3 is tightened and fixed in the axial direction of the hob arbor 4 with a nut 8 via a collar 7. The handle 5 on the right side of the figure has a tapered shape with a threaded portion 9, and the handle 6 on the left side has a cylindrical shape.

By screwing the clamp bar lO into the threaded part 9 provided on the handle part 5 and pulling it in the direction of the arrow, the tapered surface of the handle part 5 is pressed against the tapered surface on the main metal side of the hobbing machine and fixed in the radial and axial directions. . The cylindrical part of the handle part 6 fits into the tip metal part on the hobbing machine side with a small gap, and restricts the movement of the hob arbor 4 in the radial direction. The assembled hob 1 is held by the hobbing machine by supporting the handles 5 and 6 of the hob arbor 4 on the hobbing machine.

<Problems to be Solved by the Invention> In order to ensure the necessary load of the gear to be cut, the runout of the assembly hob 1 needs to be 0.01 mm or less. However, in the conventional assembled hob 1, the hob body 2 is attached to the hob arbor 4, and the hob arbor 4 is attached to the hobbing machine.
If left as is, runout will occur. Therefore, before machining, it is necessary to perform a run-out adjustment operation to eliminate run-out of the assembled hob 1.

As a result, it takes a lot of setup time when changing tools, and even if the runout is adjusted, runout cannot be completely eliminated.

The present invention has been made in view of the above circumstances, and provides a delivery and assembly hob that does not require adjustment of run-out when held on a hobbing machine, thereby reducing setup time when changing tools and improving grain size during installation. purpose.

<Means to Solve the Problems> The structure of the present invention for achieving the above object is characterized in that the handle supported by the hobbing machine is provided at both ends of the hob body to which the blade is attached. do.

Function: By integrating the assembled hob body and the hob arbor, it is possible to prevent the grain size of the workpiece gear from decreasing due to hob installation errors, and also eliminates the need for run-out adjustment work.

Example: The first example shows a cross-sectional side view of the delivery and assembly hob according to the first embodiment of the present invention.

The illustrated delivery and assembly hob 11 is capable of automatic tool exchange. A plurality of fitting grooves parallel to the axis are formed on the outer periphery of the cylindrical hob main body 12, and the blade 13 is removably fitted into the fitting grooves. Both ends of the blade 13 are ring 1
4 to prevent the blade 13 from moving axially and radially relative to the hob body 12.

Handles 15 and 16 are provided at both ends of the hob body 12,
The handle part 15 on the other hand (on the right side in the figure) includes a tapered part 17 that fits into the raw metal part of the hobbing machine, and a plastic part that is used to pull the tapered part 17 in the direction of the arrow when pressing the tapered part 17 against the tapered surface on the main metal side. 18, and a groove 19 for gripping with a robot arm or the like during automatic replacement. The other (left side in the figure) handle I6 has a tapered shape so as to fit into the tip metal of the hobbing machine, and by pressing the tip metal against the hob body 12 side, movement in the radial and axial directions is restricted. Ru.

The hob main body I2 and the handle 15, 16 are integrally formed, and the axis of the hob main body 12 and the axis of the handles 15, 16 are aligned.

Therefore, when this assembled hob 11 is installed on a hobbing machine, the handles 15 and 16 supported by the hobbing machine and the hob body 12 are concentric, so there is no need to adjust the deflection and the installation load can be increased. Can be maintained at a fine grain size.

Furthermore, since it has a groove 19 for gripping with a robot arm or the like, tools can be replaced automatically.

FIG. 2 shows a cross-sectional side view of a delivery and assembly hob according to a second embodiment of the present invention. In addition, the assembled hob 11 shown in FIG.
Components that are the same as those shown in FIG.

M handle parts 21 and 22 having tapered surfaces 21a and 22a are integrally formed at both ends of the hob main body 12, and the axis of the hob main body 12 and the axis of the handle parts 21 and 22 are aligned. A hole 23 is provided in the axial center of the hob body 12 through which the handle parts 21 and 22 pass fT.
is drilled, and by inserting the clamp bar 24 into the hole 23 and pulling the clamp bar 24 in the direction of the arrow, the handle parts 21, 2 are removed.
The holding force is obtained by pressing the tapered surfaces 21a and 22a of No. 2 against the clamping surfaces of the main metal and tip metal of the hobbing machine.

FIG. 3 shows a cross-sectional side view of a delivery and assembly hob according to a third embodiment of the present invention. In addition, the assembled hob 11 shown in FIG.
Components that are the same as ``ffl'' will be given the same reference numerals and repeated explanations will be omitted.

Handles 31 and 32 are integrally formed at both ends of the hob main body 12, and the handle 31 on one side (on the right side in the figure) has a tapered shape with a threaded part 33, and the handle on the other side (on the left side in the figure) 32 has a cylindrical shape with a ribbed portion 34.

By screwing the clamp bar 35 into the threaded part 33 and elongating the bow end, the tapered surface of the handle part 31 is pressed against the tapered surface of the hobbing machine, and the hob main body 12 is fixed in the radial and axial directions. Furthermore, by reducing the gap between the cylindrical fitting portions of the handle portion 34, the movement of the hob body 12 in the axial direction is restricted.

The assembled hob with a handle shown in FIG. , 32, when the assembled hob with handle is held on the hobbing machine, the hob body 1
The run-out adjustment described in step 2 is no longer necessary.

<Effects of the Invention> The assembled hob with a handle of the present invention has a handle supported by a hobbing machine.
Since the blades are provided at both ends of the hob body to which the blades are attached, it is possible to accurately attach the hob body to the hobbing machine without having to adjust the deflection of the hob body. Further, there is no need to attach or detach the hob main body to the hob arbor or the like, thereby shortening the hob replacement time and preventing a decrease in accuracy due to attachment. As a result, setup time when changing tools can be shortened and installation accuracy can be improved. Furthermore, by replacing the blade, the hob body with a handle can be used any number of times.

[Brief explanation of the drawing]

1 is a sectional side view of a delivery assembly hob according to a first embodiment of the present invention, FIG. 2 is a sectional side view of a delivery assembly hob according to a second embodiment of the invention, and FIG. 3 is a sectional side view of a delivery assembly hob according to a second embodiment of the invention. FIG. 4 is a sectional side view of a conventional assembly hob. In the drawings, 12 is a hob body, 13 is a blade, and 15, 16, 21, 22, 31, and 32 are handle parts.

Claims (1)

[Claims] An assembled hob with a handle, characterized in that a handle supported by a hobbing machine is provided at both ends of a hob main body to which a blade is attached.