JPH04193411A - Cutting method for punch press having cutting tool and device thereof - Google Patents

Abstract

PURPOSE:To effectively use full length of the cutting edge of a cutting tool so as to prevent partial wear and heating and lengthen the life of a tool by rotationally driving a cutting device, and at the same time moving up and down a tool holder provided with a cutting tool on the lower part through a pressing device. CONSTITUTION:An electromagnetic changeover valve 95 is actuated with a servo valve control part 113 by the position of piston 83 of a ram main body 27 and the command of a main control part 109, and oil feed circuits to the upper oil chamber 99 and the lower oil chamber 97 of the ram main body 27 are changed over. Hereby, the piston is moved up and down and the end mill 65 of a tool holder 63 is moved up and down. Meanwhile, a work W is clamed at one end with a work positioning device 9, and moved front and rear, right and left to move following to the desired cutting form. Namely, during cutting of the work W, the end mill 65 cuts the work W while moving up and down. Hereby, full length of the cutting edge of the end mill 65 is uniformly used, early partial wear is eliminated, the life of the tool is lengthened, chips are small to facilitate chip disposal, and heating is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a cutting method and apparatus for a punch press equipped with a cutting tool.

(Prior Art) Conventionally, in a punch press, in which a cutting device equipped with a cutting tool or a punch is attached to the mold mounting hole of the turret, the outline and inner and outer circumference of the workpiece are cut using an end mill or the like. Generally, the lower part of the end mill's blade length is used for cutting.

(Problem to be Solved by the Invention) By the way, in the end mill, which is a cutting tool installed in the conventional cutting device described above, only the lower part of the entire blade length is used, so only the lower part of the blade part is used first. wear out. For this reason, there was a problem that the life of the cutting tool was short and a large amount of inventory had to be kept.

An object of the present invention is to provide a cutting method and apparatus for a punch press equipped with a cutting tool that can effectively use the entire length of the cutting tool's blade, in order to improve the above-mentioned problems.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the present invention attaches a cutting device or a punch equipped with a cutting tool to a mold attachment hole of a turret in a punch press, and performs cutting or punching. In a punch press equipped with a rotating cutting tool that can freely move back and forth in the vertical direction and a cutting tool that moves the workpiece and the cutting tool relatively horizontally to cut the contour and inner and outer circumference of the workpiece. This is a cutting method.

The present invention also provides a punch press in which a cutting device equipped with a cutting tool or a punch is mounted in a mold mounting hole of a turret to perform cutting or punching. A cutting device in a punch press equipped with a cutting tool was constructed by rotating the cutting device and providing a tool holder with a cutting tool at its lower part movable up and down by a pressing device.

(Function) By adopting the cutting method and device for a punch press equipped with a cutting tool of the present invention, the cutting device equipped with the cutting tool is installed in the mold mounting hole of the turret, and this cutting device is rotationally driven. At the same time, a tool holder having a cutting tool at its lower part is moved up and down by a pressing device.

Therefore, when cutting the contour and inner and outer circumference of the workpiece, the cutting tool rotates and moves up and down, so the entire length of the cutting tool's blade can be used effectively, and the life of the cutting tool can be improved.

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

Referring to FIG. 5, the turret punch brace 1 includes a frame 5 with a pocket 3.

The turret punch 1 includes a fixed table 7 that supports a plate-shaped workpiece W, a workpiece positioning device 9 that positions the workpiece W, and a circular plate equipped with an appropriate number of cutting devices 11 or punches (not shown). an upper turret 13 shaped like
A turret device t19 is installed, which includes a disk-shaped lower turret 17 provided with an appropriate number of perforated tables 15 or dies (not shown) at a lower position corresponding to the cutting device 11 and the punch.

Further, a striker 25, which is a pressing device 23 for striking the cutting device 11 of the upper turret 13, and a ram body 27 are mounted on the upper frame 21 so as to be able to move up and down.

Further, a horizontal striker moving device 29 is provided between the striker 25 and the ram body 27 in order to selectively strike the cutting devices 11 or punches arranged in the radial direction of the upper turret 13.

Next, the cutting devices 11 arranged in the radial direction of the upper turret 13 in FIG. They are interlocked and connected to each other.

Furthermore, one of the cutting devices 11 is meshed with a spur gear 33 that rotates coaxially and integrally with a turret upper pulley 31 supported by the turret.

The above-mentioned turret pulley 31 is rotated by a known drive mechanism. That is, it is connected by a timing belt to a lower intermediate pulley 37 of a power transmission device 1135 that includes a hydraulically operated detachable clutch. Furthermore, this power transmission device 35
The upper intermediate pulley 39 is connected to a motor pulley of a drive motor 41 attached to the upper frame 21 by a timing belt.

With the above configuration, the operation is as follows: first, when the drive motor 41 is rotated, the lower intermediate pulley 39 of the power transmission device F35 is rotated, and when the detachable clutch is further connected by fluid pressure operation, the lower intermediate pulley 39 is rotated. Because 37 is turned,
The turret upper pulley 31 and spur gear 33 are rotated by the timing belt.

Therefore, the driven gears of an appropriate number (three in the figure) of the cutting devices 11 on the upper turret 13 are rotated all at once.

The cutting device 11 will be explained in more detail. 1st
Referring to the drawings and FIG. 2, the punch guide 43 of the cutting device 11 is mounted in a mold mounting hole 45 formed in the upper turret 13 so as to be slidable up and down. Further, the lower surface of the upper flange 43H of the punch guide 43 is guided by a bolt 47 attached to the upper turret 13 and supported by a lifting tube 51 that is constantly urged upward by a lifting spring 49. Note that this lifting pipe 51 is
18 of the upper flange 43a as shown in the figure.
It is also located at a 0 degree opposing position and urges the punch guide 43 upward from both sides. Further, the upper surface of the upper flange 43a is connected to the first plate 5 attached to the upper surface of the upper turret 13.
3, the upper limit of the vertical movement stroke of the punch guide 43 is regulated. Note that the lower limit is regulated by the bottom dead center of the striker 25 and a stopper plate, which will be described later.

Next, a driven gear 57 is rotatably supported by a bearing on a first plate 53 and a second plate 55 fixed to the upper turret 13 at regular intervals thereon. A spline cylinder 59 having a female spline 59a on its inner diameter is integrally fixed with a key and a snap ring.

On the other hand, a ball bearing 6 is mounted on the upper end of the inner diameter part of the punch guide 43.
1, a flat bearing is provided in the intermediate part, and a tool holder 6
3 is rotatably supported. For example, an end mill 65 is fixed to the tool holder 63 with screws. However, this tool holder 63 has a hook portion 63a,
It is hooked onto the upper part of the ball bearing 61.

Note that the tool holder 63 extends upwardly through the inner diameter portion of the female spline 59a, and extends upwardly through the inner diameter portion of the female spline 59a.
A supporting member 67 is fixed at the uppermost end with a grooved nut and a tongue washer.

Further, a tube 69 that slidably supports the support member 67 is supported by a feather key on the third plate 71 so as to be slidable up and down but not rotatable.

The third plate 71 is fixed to the upper turret 13 above the second plate 55 at a constant distance. Also, a stopper plate 73 is supported by a snap ring at the lower end of the third plate 71, so that the tube 6
The lower limit of the stroke of 9 is regulated. In addition, the tool holder 6
3, a fluid hole 63c opened from the upper end to the lower end.
is a passage for cutting oil that serves both to lubricate and cool the end mill 65. The upper end of this passage is connected to a fluid hole provided in the striker 25 via a seal. However, this seal is provided between the upper end of the tube 69 and the lower end of the striker 25.

Now, the driven gear 57 is connected to a shaft 75 which is rotatably supported by the first plate 53 and the third plate 71 by bearings.
It is meshed with a spur gear 77 which is keyed to. Furthermore,
A turret upper pulley 79 is keyed to this shaft 75, and is connected to the lower intermediate pulley 37 shown in FIG. 5 by a timing belt.

These shaft 75, driven gear 57, punch guide 43,
The relative position with respect to the lift pipe 51 will be clear from the plan layout diagram in FIG. According to this figure, the driven gears 57 of adjacent cutting devices 11 are directly meshed with each other.

A hollow coil 81 is attached to the inner periphery of the lower end of the punch guide 43 to surround the end mill 65 when the end mill 65 and the tool holder 63 are in the raised position relative to the punch guide 43. ing. This hollow coil 81 is used to determine whether the end mill 65 is broken.

The operation of the above configuration will be explained.

Referring to FIGS. 3 and 4 together, in FIG. 5, the striker 25 is positioned on the desired cutting device fllO on which the desired end mill 65 is mounted.

Next, when the ram body 27, which is the pressing device 23, is activated and lowered, the striker 25 is also lowered. The lower surface thereof is brought into contact with the upper surface of the tube 69 via a seal.

At this time, through the fluid hole of the striker 25, the fluid hole 63
Cutting oil is flowed through c to blow away dust from the end mill 65 and provide lubrication and cooling during machining.

Furthermore, when the striker 25 is lowered, the hook in FIG.
Against the urging force of the lifting spring 49, the tool holder 63 and the end mill 65 are lowered together with the punch guide 43 to a predetermined position. Note that this lowered position is set such that the lower side of the entire blade length of the end mill 65 is located on the workpiece W.

Next, the drive motor 41 in FIGS. 3 and 5 is
When the desired end mill 65 is rotated in the processing direction and the clutch of the power transmission device 35 is connected, an appropriate number (three in FIGS. 2 and 5) of all the driven gears 57 of the cutting device 11 are rotated as follows. It is rotated via a turret upper pulley 79 and a spur gear 77. However, since the male spline 63b and female spline 59a of the cutting device 11 that are not approached by the striker 25 are not engaged, the tool holder 63
does not rotate. Then, the approached tool holder 6
3 is rotated together with the end mill 65 in the processing direction to perform cutting on the workpiece W.

At this time, the end mill 65 is applied to the contour or inner and outer circumference of the workpiece W, and cutting is performed while moving the workpiece W into the desired shape, but the endmill 65 is moved up and down during the cutting process. .

A fluid pressure control circuit for moving the piston 83 of the ram body 27 of the pressing device 23 up and down in order to move the end mill 65 up and down will be described in detail with reference to FIG.

The fluid pressure control circuit 85 is composed of a hydraulic circuit 87 and a control circuit 89. The hydraulic circuit 87 receives pressure oil from an oil tank 91 by a hydraulic pump 93, and controls the lower part of the ram body 27 via an electromagnetic switching valve 95. Piping is connected to the oil chamber 97 and the upper oil chamber 99. Furthermore, the electromagnetic switching valve 95 and the upper oil chamber 99
A pressure detector 101, for example, P
D is provided.

The control circuit 89 inputs the pattern shape of the workpiece W from the pattern memory 103 and the command section 105 to the main control section 109 via the pattern setting section 107 . The main control section 109 inputs the signal from the pressure detector 101 and sends a signal to the servo control section 113 via the Z-axis command section 111 for vertical movement of the piston 83 of the ram body 27. The servo control section 113 receives a signal from a position detection section 117 of a limit switch 115, which detects the vertical position of the piston 83, for example, and operates the electromagnetic switching valve 95.

With the above configuration, the servo valve control unit 113 operates the electromagnetic switching valve 95 based on the position of the piston 83 of the ram body 27 and a command from the main control unit 109, and the supply to the upper oil chamber 99 and lower oil chamber 97 of the ram body 27 is controlled. Switch the oil circuit. Therefore, the piston 83 moves up and down, and due to the operation of the piston 83, the end mill 65 provided on the tool holder 63 also moves up and down.

On the other hand, the workpiece W is clamped at one end by the workpiece positioning device 9 and moves back and forth and left and right to conform to a desired cutting shape. That is, during cutting of the workpiece W, the end mill 65 performs the cutting while moving up and down.

Therefore, the entire length of the blade of the end mill 65 is used without a blade part, and only a local part is not worn out early, the tool life is significantly extended, chips are small, chip disposal is easier, and heat generation is reduced.

Note that the present invention is not limited to the embodiments described above, and can be implemented in other embodiments by making appropriate changes. For example, although the present embodiment has been described using the end mill 65 as the tool, the invention is not limited to this and can be applied to general cutting tools as well.

〔Effect of the invention〕

As can be understood from the above description of the embodiments, according to the present invention, the cutting device is rotationally driven, and at the same time, the tool holder having the cutting tool at the bottom thereof is moved up and down by the pressing device. When cutting a workpiece, the cutting tool rotates and moves up and down, so the entire length of the cutting tool's blade can be used effectively, preventing local wear and heat generation, and extending the life of the tool. Since the chips are also small, they can be easily handled and productivity can be improved.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 shows the main parts of this invention, and I--
A sectional view taken along line 1, FIG. 2 is a plan layout of the main components in FIG. 1, and FIG. 3 is a schematic layout explanatory diagram showing the drive system.
FIG. 4 is an explanatory view showing a fluid pressure control circuit, and FIG. 5 is an explanatory side view showing the entire turret punch press according to an embodiment of the present invention. 1... Turret punch press 11... Cutting device 13... Upper turret 23... Suppression device 45... Mold mounting hole 63... Tool holder 65... End mill Figure 2 1. Turret Punch press 11...Cutting equipment! 13・Upper turret 23・・Suppression device 45・Gold! ! ! Mounting 663...Tool gA holder 69. Fig. 1

Claims (2)

[Claims] (1) A punch press in which a cutting device equipped with a cutting tool or a punch is installed in the mold mounting hole of the turret to perform cutting or punching, and the rotating cutting tool can be moved back and forth in the vertical direction. A cutting method in a punch press equipped with a cutting tool, characterized in that the workpiece and the cutting tool are moved relatively horizontally to cut the contour and inner and outer circumference of the workpiece. (2) A punch press in which a cutting device equipped with a cutting tool or a punch is installed in the mold mounting hole of the turret to perform cutting or punching, and the cutting device installed in the mold mounting hole is A cutting device for a punch press equipped with a cutting tool, characterized in that it is rotatably driven and is provided with a tool holder having a cutting tool at its lower part that can be moved up and down by a pressing device.