JPS6029364Y2 - A device that cuts spiral grooves on the inner surface of cylindrical objects. - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an apparatus for easily cutting a spiral groove on the inner surface of a cylindrical object using a press machine.

For example, there are lathes and other machines that cut spiral grooves on the inner surface of a cylindrical object, but when cutting spiral grooves on the inner surface of a small and thin metal cylinder such as a lipstick holder, it takes a lot of work. There are drawbacks that make it difficult to remove.

From this point of view, the present invention proposes a device that can easily cut spiral grooves using a press machine.

An embodiment of the present invention will be described below based on the attached drawings. 1 is a press machine (the embodiment is a foot-operated type), 2 is an operating shaft, and 3 is attached to the tip (lower end) of the operating shaft 2. This holder 3 serves as a holder for the learning shaft 4, and as shown in FIG. 3, the holder 3 holds the learning shaft 4 through a bearing 5 so as to freely rotate.

Reference numeral 6 denotes a mounting ring that attaches the holder 3 to the operating shaft 2.

As shown in FIG. 2, the training shaft 4 has a spiral training groove 7 cut on its outer peripheral surface, and a cutter 9 is attached to the tip (lower end) of the training shaft 4 via a chuck 8.

10.11 is a support punch with the spindle 4 fixed vertically in the middle on the table 13, and this support punch 10
．． 11 has a horizontal rotating claw shaft 14 via a bearing 12,
15 are rotatably attached.

As shown in FIG. 3, the tips 14' and 15' of the rotary claw shafts 14 and 15 are in contact with the upper surface 7a of the spiral groove 7 on the 14' side and on the lower surface 7b on the 15' side.

16 is a workpiece fixing frame on the table 13.

The device of the present invention has the above-mentioned configuration, and as shown in FIG. lower.

When the operating shaft 2 descends, the learning shaft 4 also descends.
During this descent, the tips 14' of the horizontal rotating claw shafts 14, 15
, 15' are engaged with the spiral training groove 7, the training shaft 4 rotates, and the cutter 9 attached to this training shaft 4 rotates.
rotates.

When the operating shaft 2 is further lowered, the cutter 9 enters the inner circle of the workpiece a, and cuts a spiral groove having the same shape as the spiral groove 7 on the inner surface of the workpiece as shown in FIG.

A spiral groove is cut into the workpiece a by the above action, and the blade 9 is rotated by the vertical movement of the operating shaft 2 of the press machine 1, and the spiral groove is easily cut into the cylindrical workpiece a. can do.

Therefore, if the device of the present invention is used, for example, to cut spiral grooves on a lipstick holder, it will be possible to form spiral grooves on the inner surface by bonding a cylinder with spiral grooves separately machined to the inner surface of the outer cylinder, as in the past. Since it is not necessary to employ extremely complicated methods, manufacturing costs can be reduced and the holder can be made smaller.

Next, the device of the present invention connects the horizontal rotating claw shafts 14 and 15 to the support rod 10.
, 11, so when the learning shaft 4 rotates, this rotational action is applied to the horizontal rotating claw shafts 14, 15.
It is also transmitted to the spiral groove 7 and the tip 1.
The engagement friction with 4' and 15' is small and prevents smooth rotation.

In addition, in the present invention, support rods 10° 11 are installed on the left and right sides of the training shaft 4, and horizontal rotating claw shafts 14, 15 are attached to these, and the tips 14', 15' of the horizontal rotating claw shafts 14, 15 are mounted on one side. 14
' is in contact with the upper surface 7a of the spiral groove 7, and the other 15'
is in contact with the lower surface 7b, so there is no play (backlash) when switching between the vertical movements of the operating shaft 2 and the master shaft 4, and therefore the spiral groove in the workpiece a can be formed with high precision. (It has the effect that it can be cut and does not interfere with the rotation of the shaft 4.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the entire press machine implementing the device of the present invention, Fig. 2 is an enlarged sectional view of the main parts, and Fig. 3 is a front view showing the engagement relationship between the learning shaft and the horizontal rotating claw shaft. , FIG. 4 is a perspective view of the workpiece. 1...Press machine, 2...Operating axis, 4
...Study axis, 7...Spiral learning axis, 9...Knife, 10.11...Support rod, 14,15... Horizontal rotating claw axis.

Claims (1)

[Scope of utility model registration request] At the tip of the operating shaft that moves up and down, a free-rotating shaft with a spiral groove cut on its outer circumferential surface is attached via a holder, and a cutter is attached to the tip of the pivot shaft via a chuck. A support punch is provided with a horizontal rotary claw shaft that engages with the spiral groove of the shaft from the left and right, and the horizontal rotary claw shaft and the spiral groove are secured to each other with one on the upper surface of the groove and the other on the groove. A device that cuts a spiral groove on the inner surface of a cylindrical object that is configured to be in contact with the lower surface.