JPH0129650B2 - - Google Patents

Description

[Detailed description of the invention] Conventional multi-spindle tapping machines can only process the top surface of the workpiece, so if you want to process the side surfaces as well, place the workpiece on the tapping machine so that the side faces are upward. I had to set it up again so it would face me.

The present invention relates to a multi-spindle tapping machine capable of horizontally or diagonally processing both the top surface and the side surface, and will be specifically described below with reference to the accompanying drawings.

In FIG. 1, numerals 1 and 2 are a gear box and a spindle head, which are respectively provided on the front side of a screw tapping machine body (not shown), and numeral 3 is a workpiece.

4 is a quick-change universal joint that is rotated by a drive shaft protruding downward from the gearbox 1, and from the spindle 5 connected to the left universal joint 4 to the tap 6 at the lower end, the workpiece 3 is rotated. This is similar to the conventional method, in which the top surface is processed vertically.

A flexible shaft 8 having a flexible tube 7 mounted thereon is connected to the right universal joint 4 .

On the right side of the mounting bracket 9 fixed to the right end of the lower surface of the spindle head 2 is an arm 10 facing downward.
is attached so that it can be adjusted up and down using a bolt 12 inserted into a vertically elongated hole 11 bored at its upper end.

A spherical concave hole 10a is formed in the lower surface of the arm 10, and a spherical protrusion 14 provided at the upper end of the holder 13 is loosely fitted into the spherical concave hole 10a, and is fitted into the base of the spherical protrusion 14. By fixing the divided locking plate 15 to the arm 10 with bolts 16, the holder 13 is held rotatably around the vertical axis and swingably around the horizontal axis.

A threaded cylinder 19 facing in the left-right direction and into which the spindle 18 of the master threaded spindle set 17 is threaded is provided through the lower part of the holder 13, and a threaded cylinder 19 that is coaxial with the spindle 18 is provided on both left and right sides of the lower part of the holder 13, respectively. The guide tube 20 and the outer tube 21 are fixedly attached.

The free end of the flexible shaft 8 is connected to the outer cylinder 2
Bearing 2 is attached to support tube 22 which is loosely fitted into
3 and 23, and its tip is connected to the spindle 18 via a universal joint 24.

A collector chuck 25 is attached to the free end of the spindle 18, and the collector chuck 25 is held at the tip of the guide tube 20 with a bearing metal 26, and protrudes from the guide tube 20, and a tap 27 is stopped at the tip. It is worn.

In the above-mentioned screw tapping machine, gear box 1
When the right quick-change universal joint 4 is rotated by the drive shaft, the flexible shaft 8 and the universal joint 2 are rotated.
4. The spindle 18 rotates and is screwed into the threaded cylinder 19 fixed to the holder 13
As the collet chuck 25 moves forward and backward together with the flexible shaft 8 and the like, the collector chuck 25 also moves forward and backward while rotating, and the tap 27 fixed to its tip can tap the workpiece 3.

Then, loosen the bolt 12 and remove the arm 1.
By raising and lowering the holder 13, the height of the tap 27 can be adjusted, and by loosening the bolt 16, the longitudinal position and inclination angle of the holder 13 can be adjusted. It is possible to tap any part of the screw at any angle.

Although the case where the right side of the workpiece is machined has been described above, the left side and front side can be similarly machined at the same time as the top and right side.

As mentioned above, the screw tapping machine of the present invention can work without moving the workpiece 3 set on the tapping machine.
It is extremely convenient because the side surfaces can also be processed at the same time, and this is particularly effective when the workpiece 3 is large and heavy.

[Brief explanation of drawings]

FIG. 1 is a front view showing the main parts of an embodiment of the multi-spindle screw tapping machine of the present invention, and FIG. 2 is an enlarged longitudinal sectional front view of the main parts of FIG. 1. 1... Gear box, 2... Spindle head,
3...Workpiece, 4...Quick change type universal joint, 5...Spindle, 6...Tap,
7...Flexible tube, 8...Flexible shaft, 9...Mounting bracket, 10...Arm, 10a...
Spherical recessed hole, 11... Vertical hole, 12... Bolt, 13...
Holder, 14... Spherical projection, 15... Locking plate, 16
...Bolt, 17...Master threaded spindle set, 18...Spindle, 19...Screw tube, 20...Guide tube, 21...Outer tube, 22...Support tube, 23...Bearing, 24...Universal joint, 25...Collection chuck, 26 ...Bearing metal, 27...tap.

Claims (1)

[Claims] 1. An arm facing downward is attached to a strategic point of the spindle head of a multi-spindle screw tapping machine so that the height can be adjusted and the arm can be swung back and forth, and the upper end of the holder is vertically attached to the lower surface of the arm. It is mounted to be rotatable around an axis and swingable around a horizontal axis, and a master threaded spindle set facing horizontally is attached to the bottom of the holder, and the base end of the spindle in the spindle set is connected to the gearbox. A multi-spindle tapping machine capable of machining side surfaces, which is connected to a drive shaft via a flexible shaft and has a collet chuck for attaching a tap attached to the tip of the spindle. 2 By fitting the spherical protrusion provided on the upper end of the holder into the spherical recess provided on the lower surface of the arm,
A multi-axis screw tapping machine capable of processing a side surface according to claim 1, wherein the upper part of the holder is attached to an arm so as to be rotatable around a vertical axis and swingable around a horizontal axis. .