JPH0214901Y2 - - Google Patents

Description

[Detailed Description of the Invention] a. Field of Industrial Application The present invention relates to a tapping device for a dedicated tapping machine or a combined machine for punching and tapping.

b. Prior Art Conventionally, for example, in the numerically controlled turret punch press 1 shown in FIG. There was a device in which the tapping device 7 was rotationally driven by an appropriate means.

However, since the tapping device has one tap in the center of one of the mounting holes for the punch 5 of the upper turret 3, a large number of punch mounting holes are occupied for each tap diameter and pitch. However, it was necessary to provide a large number of tap holders and devices for rotationally driving the tap holders.

c Problems to be solved by the invention In order to provide a large number of the above-mentioned tap holders and devices for rotationally driving the tap holders, not only will the drive system of the driving devices become complicated, but the manufacturing cost will naturally increase, and the space will also be considerably large. There is a problem in that it has to be taken. In addition, there will be more inconveniences than ever before in terms of workability, operability, etc.

The purpose of this invention was proposed in order to solve the problems in view of the above circumstances, and it considerably simplifies the drive system of the drive device, requires less space, has low manufacturing costs, and also enables automation of tapping processing. The present invention provides a tapping device for smoothing the surface.

d.Means and effects for solving the problem In order to achieve the above object, the present invention has a vertical drive shaft gear fitted to the drive shaft, and a plurality of tap holders that mesh with the drive vertical shaft gear and are movable up and down. This is because the rear end of each of the tap holders is provided with a female thread having the same pitch as the pitch of each tap attached to the tip, and an elevating device is provided at the tip with a male thread that engages with the female thread. It is configured.

All of the tap holders mentioned above rotate forward and reverse, but a desired tap holder is lowered by an elevating device to perform tapping. Therefore, it is a low-cost device that has high area efficiency and shares the attached drive device.

For example, in the case of the upper turret 3 of the above-mentioned turret punch press 1, the device of the present invention is capable of attaching three to six types of taps to a hole for attaching one punch, and is a tapping device for quick tool change. Become.

e. Example Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 1 is a side view of a numerically controlled turret punch press 1 equipped with a tapping device 7 of the present invention.

In the turret punch press 1 according to the embodiment, a machine frame 11 has a gate shape as a whole, and an upper machine frame 13 is provided with an upper turret 3 which can be rotated and positioned in a horizontal position around an axis 9. The lower machine frame 15 is provided with a lower turret 19 that can be rotated and positioned in a horizontal position around an axis 17, and the upper turret 3 and the lower turret 19 are rotated and positioned at the same time and in the same direction by a chain (not shown) or the like. Ru.

A fixed table 23 is provided in the gap portion 21 of the machine frame 11 having a gate shape.
A moving table 27 is provided which moves left and right (in the Y-axis direction) in FIG. 1 while being guided by guide rails 25 provided on both sides of the table.

Movable tables 27 on both sides of fixed table 23
are connected by a carriage base 29, in which the first carriage 31 is connected to the other carriage base 29.
It can be moved and positioned freely in the front and back directions (X-axis direction) in the figure.

The carriage 31 is provided with a gripping claw device 33 that grips the workpiece W and moves and positions it on the fixed table 23 in the X-axis and Y-axis directions by numerical control.

The striking element 35 is shown above the punch 5 in Figure 1.
For example, the head of a punch 5 connected to a ram 39 which is moved up and down by a crankshaft 37 of the press is struck to punch the workpiece W between it and a die (not shown) on the lower turret 19.

The tapping device 7 of the present invention performs the tapping operation in a numerically controlled manner using the driving force of a gear device 41 extending from the shaft 9, for example, at a position away from directly below the striking element 35.

In this case, the workpiece W is usually fixed in a die insertion hole on the lower turret 19 by a plate holder (not shown) on top of a circular drill bush (described later).

The apparatus of the present invention is constructed as illustrated in FIGS. 2, 3, and 4.

The tapping device 7 of the present invention includes an upper housing 4
3 and a lower housing 45 are screwed together with bolts 47, 47, and the interior formed by the upper housing 43 and lower housing 45 serves as an oil bath 49. Further, the upper housing 43 is covered with a head plate 51, and bolts 5 are attached to the upper turret 3.
It is installed in 3.

Power supplied by a control drive motor such as a servo motor (not shown) is transmitted from a pulley or gear to a drive shaft 55 via a key 57. The drive shaft 55 is supported at both ends by bearings 59, 59, and can be driven forward and backward by numerical control. The bearing 59 is fixed by an upper housing 43 and a lower housing 45. A vertical drive gear 61 is fitted into the center of the drive shaft 55 . Three gear shafts 63 are provided at concentric annular positions around the drive shaft 55, as shown in FIG. 4, and mesh with a drive vertical shaft gear 61 fitted onto the drive shaft 55. Therefore, each gear shaft 63
can all rotate forward and backward in the same direction.

A tap holder 69 is attached to the tip of each gear shaft 63.
are installed and integrated. Therefore, the tap holder 69 is rotated together with the gear shaft 63. At the center of the tap holder 69 are taps 6 of various sizes.
5 is fixed.

At the rear end of each gear shaft 63, internally there is a female threaded portion 67 of the same pitch as the respective tap 65.
It is equipped with Inside the upper housing 43 on each gear shaft 63 is a fluid pressure cylinder 71 which is a lifting device.
A piston rod 73 of the hydraulic cylinder 71 extends downwardly. The piston rod 73 has a male thread on its outer periphery, and the male thread is screwed into the female thread 67. Therefore, when the drive shaft 55 rotates, the drive vertical shaft gear 6
1, each gear shaft 63 also rotates. Since the female thread 67 provided inside the rear end of each gear shaft 63 and the male thread provided at the tip of the piston rod 73 are screwed together, each gear shaft 63 rotates at the rotation speed of a drive motor (not shown). descends by an amount corresponding to

The piston rod 73 itself is attached to the upper housing 43.
Rotation is restricted by engagement between a pin 77 attached to the lower end of the piston rod 73 and a groove 75 formed in the piston rod 73, so that the piston rod 73 can only move up and down.

A bullet 81 is provided below the piston 79 of the fluid pressure cylinder 71, and urges the piston 79 upward. Further, a stop ring 83 which is a locking member for setting the lower limit value of the piston 79 is provided around the bullet 81 at the bottom of the fluid pressure cylinder 71.
are provided so that they can be exchanged freely. Therefore, by feeding compressed air from the fluid pressure inlet 91 provided in the head plate 51, the piston rod 73 is lowered against the bullet 81 until it abuts against the stopper ring 83. When the piston rod 73 is lowered, each gear shaft 63 is also lowered because the male thread provided at the tip of the piston rod 73 and the female thread 67 provided at the lower end of each gear shaft 63 are screwed together. At that time, since each gear shaft 63 and the driving vertical shaft gear 61 are meshed with each other, the driving vertical shaft gear 61
plays the role of a spline. Further, when the compressed air is discharged from an outlet (not shown), the piston rod 73 is raised by the urging force of the ammunition 81. Depending on the vertical position of the piston rod 73,
The operating position of the vertical stroke of the tap holder 69 can be changed upward or downward.

The aforementioned fluid introduction port 91 is connected to the fluid pressure cylinder 71.
The head plate 51 is provided with a number corresponding to the number of the head plate 51.

Further, the stopper ring 83, which is the aforementioned locking member, is used to determine the amount of descent of the piston rod 73 according to the size of each tap 65.
In the case of a tap with a small pitch, the stroke is increased by reducing the height of the stopper ring 83. In the case of a tap with a large pitch,
By increasing the height of the stopper ring 83, the stroke is reduced to make the total stroke of each tap the same.

As shown in FIG. 2, a cutting oil nozzle 85 is provided below the center line of the lower housing 45, and sprays cutting oil onto the tip of each tap 65.

Furthermore, as shown in FIGS. 3 and 4, the tapping device 7
For example, a set of a light emitter 87 and a light receiver 89 is provided around the. This emitter 87 and receiver 89
This is to detect whether or not the tip is damaged when the tap 65 returns to the raised position shown in FIG. Note that the two-dot chain line shown in the lower part of FIG. 3 is the pass line 93 of the workpiece W.

Further, each gear shaft 63 holding the tap holder 69 described above is provided in the oil bath 49 and can be easily slid up and down.

To explain the operation of performing tapping using the tapping device 7 of the present invention, first, compressed air is supplied from the fluid pressure inlet 91 to the predetermined fluid pressure cylinder 71.
Activate. When the fluid pressure cylinder 71 operates, only a predetermined piston rod 73 is lowered until it comes into contact with a stopper ring 83, which is a locking member. When the piston rod 73 descends until it comes into contact with the stopper ring 83, the tip of the tap 65 approaches the upper surface of the workpiece W on the pass line 93 via the gear shaft 63 and the tap holder 69. The operation up to this point is called the quick approach. Thereafter, a control drive motor (not shown) operates to rotate the drive shaft 55 in the normal direction. When the drive shaft 55 rotates, each gear shaft 63 rotates in the same direction via the drive vertical shaft gear 61. Since the female threaded portion 67 provided at the rear end of each gear shaft 63 is threaded with the male thread of the piston rod 73,
Each gear shaft 63 is lowered by the female screw portion 67 by an amount corresponding to the rotation speed of the control drive motor. Only the predetermined gear shaft 63 of the tap 65 necessary for machining has been lowered by that amount by the above-mentioned quick approach, so that the predetermined tap 65
Only the metal part bites into the workpiece W and tap processing is performed. Although the other taps 65 are also lowered by the action of the female threaded portion 67, they do not reach the workpiece W and no other processing than necessary is performed.

After tapping, when the control drive motor is reversed, the rotation of the tap 65 is also reversed, and the tip of the tap 65 is removed from the workpiece W. Next, the compressed air is removed from the fluid pressure cylinder 71 and the quick approach piston rod 73 is raised, whereby the tap 65 is also raised and the tapping process is completed.

By repeating the above operations, various necessary tapping processes are performed.

f. Effects of the invention As can be understood from the embodiments described above, the tapping device of the present invention has a plurality of taps in a narrow space, so the space is greatly reduced compared to the conventional one. It only takes space.

In the present invention, since forward and reverse rotation is performed by one vertical drive shaft gear, the drive system section can be greatly simplified.

The present invention is highly space efficient in that tools can be replaced quickly, and since the attached drive device is shared, the overall cost is greatly reduced.

By employing the tapping device of the present invention, there is no need for operations required to replace the tapping device itself, making automation and process lineization easier.

By setting the same type of tap in the tapping device of the present invention, it is possible to replace the tap in the case of a broken tap, and there is no interruption in work, which improves work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a side view of a numerically controlled turret punch press equipped with the tapping device of the present invention. FIG. 2 is an explanatory diagram mainly illustrating the oil bath of the device of the present invention. Figure 3 is - in Figure 4.
It is a sectional view along a line. FIG. 4 is a plan view of the device of the present invention. Explanation of symbols representing main parts of the drawings, 1... Turret punch press, 7... Tapping device, 4
9...Oil bath, 55...Drive shaft, 61...Driving vertical shaft gear, 65...Tap, 67...Female thread portion, 69...Tap holder, 83...Stopper ring.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A vertical drive shaft gear is fitted to the drive shaft, and a plurality of tap holders are provided which mesh with the drive vertical shaft gear and are movable up and down, and the rear end of each tap holder is provided with a vertical drive shaft gear. 1. A tapping device, characterized in that the tip is provided with a female thread having the same pitch as the pitch of each tap attached to the tip, and further includes a lifting device with a male screw in the tip that engages with the female thread. (2) Utility model registration claim 1, characterized in that the elevating device comprises a fluid pressure cylinder, and a locking member for setting a lower limit value of the piston rod is replaceably provided at the lower part of the piston of the fluid pressure cylinder. Tapping device as described in section. (3) A utility model registration characterized in that a pin for regulating the rotation of the piston rod of the cylinder is provided at the lower end of the upper housing, and a groove that engages with the pin is provided in a part of the outer periphery of the piston rod. A tapping device according to claims 1 and 2.