JPS6023928B2 - Rough cutting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a rough cutting machine for rough finishing the tooth surfaces of worms and racks, leaving a finishing allowance, and for rough finishing the threads of large diameter screws, leaving a finishing allowance. Regarding.

To roughly finish a secondary gear material, for example, a gear cutting machine equipped with a special cutter for rough gear cutting that matches the tooth profile is generally used.

However, coupled with the use of expensive special cutters,
This cutter wears out quickly, so the cost of cutting tools increases significantly. The present invention was developed under the above circumstances, and its purpose is to provide a rough cutting machine that can perform rough cutting at low cost, has high versatility, and has a high processing speed. It is in.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

Reference numeral 1 in FIGS. 1 and 2 is a bed, and a carriage 2 is movably provided on the upper surface of the bed.

In addition, the code|symbol 3 is a carriage guide rail. The carriage 2 is reciprocated by a carriage drive device 4 provided on one side of the bed 1. Workpiece supports 5 and 6 are provided on the upper surface of the carriage 2, and the workpiece A is placed between these supports 5 and 6.
can be attached to the removable mark. One of the workpiece supports 5 is immovable, and in this embodiment a chuck is used, which is supported by a rotary drive device 7 on the carriage 2. The rotary drive device 7 supports the workpiece 5
For example, it is designed to be operated in conjunction with a table driving device 4. Other workpiece support 6
In this embodiment, a tailstock is used which is slidable along a guide rail 8 provided on the upper surface of the carriage 2.
Note that this tailstock has the same structure as that used in lathes. An adjustment mechanism 9 is provided near the carriage 2. In this mechanism 9, a support I2 is rotatably attached to a mechanism support 10 protruding from the rear surface of the bed, about a substantially horizontal axis 11, and a cradle 14 is attached about an axis 13 perpendicular to this support 12. It becomes possible to rotate. The support body 12 is a member 12
a, and this section 12a is the mechanism support section 10.
It is rotatably attached via a screw 11. In addition, 12b in FIG. 2 is a reinforcing member that connects the support body 12 and the member 12a. An arbitrary rotational position of the support body 12 about the axis 11 is held by rotating the fixed handle 15. In addition, code 1
Reference numeral 6 denotes a pointer pointing to a rotation angle scale provided on the circumferential surface of the section 12a. Further, a pointer 17 is provided on a part of the pedestal 14 to indicate a rotation angle scale provided on the support body 12. Any rotational position of this pedestal 14 about the shaft 13 is held by a fastening operation by operating a fixed handle 18. Reference numeral 19 indicates a cutter head, and this head 19 includes a head body 2 disposed along the direction across the carriage 2, a pair of pulleys 21,
An endless rotary saw 23 is separated from the workpiece A via 22.
At the same time, a guide 24 of this rotary saw 23 is attached, and a saw drive device 25 is attached.

A band saw, a chain saw, or the like is used as the endless rotary saw 23, and in this embodiment, a band saw is used. This rotary saw 23 is operated by guides 24, 24.
The direction of the blade can be changed between 4 and 4 so that the blade faces the workpiece A. The saw drive device 25 also includes a motor 26, a worm 27 connected to the output of the motor 26,
A rotating shaft 29 is formed from a worm 27 and a worm gear 28 that meshes with the worm gear 28. A rotating shaft 29 connected to the worm gear 28 is connected to one of the pulleys 21. The rotating shaft 29 of the cutter head 19 having such a structure is passed through the support portion 14a provided with the pedestal 14, and this allows the head body 20 to rotate along the direction in which it is moved away from the workpiece A. It is movably attached to the pedestal 14. Further, a head driving device 30 is provided across the cutter head 19 and the pedestal 14. This device 30 is provided for pivoting the cutter head 19 and is formed in this example by a hydraulic cylinder. In addition, 31 and 32 in FIG. 3 are respective pivots. Note that 33 in FIGS. 1 and 2 is a stopper device, which is provided with a stopper adjustment section 34 whose position can be adjusted up and down, and the head main body 20 is supported at the upper end of this stopper adjustment section 34. Next, the operation of the above embodiment will be explained.

First, both ends of the workpiece A are attached to the workpiece supports 5 and 6, and the workpiece A is set on the carriage 2. Next, the cutter head 19 is adjusted. This adjustment is effected by pivoting the support 12 about the axis 11 and by pivoting the pedestal 14 about the axis 13. By rotating the support body 12, the cutting angle of the endless rotary saw 23 into the workpiece A is adjusted, and by rotating the pedestal 14, the lead angle is adjusted. After these preparations are completed, the saw drive device 25 is operated to endlessly rotate the endless rotary saw 23, and the head drive device 30 is operated to pivot the cutter head 19 to rotate the endless rotary saw 23. Press against workpiece A. At the same time, the platform drive device 4 and the rotation drive device 7 are operated to continuously feed the carriage 2 supporting the workpiece A while rotating the workpiece A. Then, as shown in Fig. 3a, a spiral cut is made in the workpiece A (C in Fig. 3).
indicates the kerf. ) will be applied. Thereafter, the carriage 2 is returned to its initial position and the cutter head 19 is adjusted again. With this adjustment, the support 12 is rotated in the opposite direction to the rotation of the previous adjustment, and as a result, the endless rotary saw 23
is adjusted so that it can be cut in the direction opposite to the direction of the cut described above. Next, each drive device 25, 3 again
0, 4, and 7 are operated, a spiral cut is made in the workpiece A. As a result, as shown in Fig. 3b, the tips of the cut groove B made by this cutting and the existing cut groove C made by the previous cut intersect, so that in the area where rough cutting is planned, as shown in Fig. 3b. A portion D having a triangular cross section surrounded by continuous V-shaped kerfs B and C is cut off. This part D
Workpiece A' in the state where has been removed, that is, the rough cutting has been completed
FIG. 3c shows this. Of course, in this case, it goes without saying that the cut off portion D is continuous in a spiral shape. That is, the rough cutting work on the worm workpiece A is completed by the above operations. Note that the above embodiment is for rough cutting of a worm, but
It is possible to perform rough cutting of large screws using a similar procedure.

In addition, in the configuration of the above embodiment, the table driving device is configured to provide intermittent feed to the moving table, and the workpiece support is configured to be able to fix the rack material (workpiece), thereby making it possible to perform rough cutting for the rack. It can be implemented as a machine.

however. The timing of the operation is set so that when the cutter head is raised by the head drive device, the moving table is fed, and when the moving table is stopped, the cutter head is lowered to make a cut. In this case, adjustment by rotating the pedestal is not performed, but only adjustment of the cutting angle by rotating the support body. In addition, although the said one Example was comprised as mentioned above, this invention may be implemented as follows.

That is, in the above embodiment, the lower member 12a of the support body 12 is pivotally attached to the mechanism support portion 10 via the substantially horizontal shaft 11, but instead of this, as shown in FIG.
With the lower part 12 of ' being horizontal, this capital material 12a
' is attached to the mechanism support part 10 via a substantially vertical shaft 13' so as to be able to be rolled around in a horizontal plane, and it may be an upper vertical part of this support body 12' (or an auxiliary member (not shown) connected to this vertical part). ) is rotatably connected to a cradle 14' via a substantially horizontal shaft 11', and a cutter head 19 is attached to this pedestal 14'.
The adjustment function 9 may be configured by attaching a . Furthermore, the adjustment mechanism 9 does not need to be attached to the bed, and may be attached to another fixed part such as a bed installation surface apart from the bed.

In addition, when carrying out the present invention, unless it is contrary to the gist of the invention, a carriage, a workpiece support, a table drive device, a support, a shaft, a pedestal, an adjustment mechanism, a cutter head, a head main body, an endless rotation The specific structure, shape, position, etc. of the saw, saw guide, saw drive device, head drive device, etc. are not limited to the above-mentioned example, and can be configured and implemented in various ways. Of course.

The gist of the present invention described above is the structure described in the claims above.

Therefore, according to the present invention, an endless rotary saw is pressed against the workpiece while rotating and continuously feeding the workpiece, or while fixing the workpiece and giving intermittent feed, and roughening the workpiece. The design allows for cutting off the area to be cut into a triangular shape, making it possible to perform rough cutting without using the extremely expensive dedicated cutter that was previously required. However, rough cutting is easily possible. Since an endless rotary saw is used, there is less waiting time during machining, and therefore the machining speed is high. That is, for the reasons mentioned above, if the processing machine of the present invention is used, rough cutting can be performed at a very low cost, and its practical effects are great. Furthermore, since the cutter head's position relative to the workpiece is adjusted by the adjustment mechanism, the angle and depth of cut into the area to be roughly cut can be arbitrarily changed, and as a result, various tooth shapes can be obtained. You can get a high level of versatility that can be used.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a schematic plan view;
Figure 2 is a side view seen from the direction of arrow 0 in Figure 1, Figure 3 a
, b, and c are cross-sectional views of the workpiece shown in the order of machining. FIG. 4 is a schematic side view illustrating another embodiment of the adjustment mechanism. 1... Bed, 2... Carriage table, 4... Platform drive device, 5, 6... Workpiece support, 9... Adjustment mechanism , 11...Axis, 1
2...Support body, 13...Shaft, 14...
...cradle, 19... cutter head, 20
…． ...Head body, 21, 22...Pulley,
23...Endless rotary saw, 25...Saw drive device, 30...Head drive device, A...
...workpiece. Figure 1 Figure 2 Figure 3 *Music diagram

Claims (1)

[Claims] 1. A carriage provided with a workpiece support to which a workpiece can be detachably attached, a carriage drive device for moving this carriage, and a carriage provided near the carriage and centered on a substantially horizontal axis or a substantially vertical axis. an adjustment mechanism comprising a rotatable support body, and a pedestal provided on the upper part of the support body so as to be rotatable about a substantially vertical axis or a substantially horizontal axis different from the above-mentioned axis; and the above-mentioned workpiece. a head body pivotably mounted on the pedestal so as to be rotatable along the direction of approaching and separating from the workpiece; an endless rotary saw attached to the head body for approaching and separating from the workpiece; A cutter head consisting of a saw drive device for driving a rotary saw, and a head drive device provided between the cutter head and the pedestal for pivoting the cutter head, and the cutter head can be operated by the endless rotary saw. A rough cutting machine characterized by cutting off a portion of an object to be roughly cut into a triangular shape.