JPS6117774Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a ram stroke amount control device in a shearing machine, and more specifically, it automatically sets the ram stroke amount according to the horizontal width of the plate material to be cut. This invention relates to a stroke amount control device.

When cutting a plate using a shearing machine, the end of the plate is generally positioned by contacting the pack gauge or front gauge, and then the ram is operated to cut the plate.

And the shearing machine as mentioned above is
In order to perform cutting work efficiently, the stroke amount of the ram can be adjusted according to the horizontal width of the plate to be cut. In addition, it must be adjusted each time, and since the adjustment work is complicated, the current situation is that the stroke amount of the ram is usually set at the maximum position to perform cutting.

For this reason, in the cutting operation, particularly when the width of the plate material to be cut in the left-right direction is short, the idle time becomes long and the cutting operation is extremely inefficient.

The present invention was devised in view of the conventional problems as described above, and detects the width of the board in the left and right direction using multiple detection devices arranged in the left and right directions, and detects the width of the board in the left and right direction. The drive time of the ram drive device is controlled to automatically control the downward stroke amount of the ram according to the width of the plate material.

Hereinafter, a preferred embodiment of this invention will be described in detail with reference to the drawings.

1 and 2 show a shearing machine 1 equipped with a ram stroke amount control device according to this invention.
The shearing machine 1 includes a table 3 that supports a plate W, a positioning device 5 that positions the plate W, and a positioning device 5 that presses the plate W on the table 3. A plate holding device 7, a detection device 9 that detects the plate material W on the table 3, a ram 13 to which an appropriately inclined upper blade 11 is attached, a drive device 15 that moves the ram 13 up and down, and a device that is long in the left and right direction. It consists of a lower frame 19 to which a lower blade 17 is attached.

The plate holding device 7 is located above the table 3.
In addition, a plurality of them are arranged in the left-right direction at a predetermined interval on the lower bottom part of the front plate 21 provided at the front part of the ram 13, and are configured as follows. That is, as shown in detail in FIG.
A cylinder case 23 is vertically installed from the lower bottom of 1,
The cylinder chamber 25 is communicated with an oil passage 27 bored in the front plate 21. The cylinder chamber 25 includes a piston 31 having a diameter slightly smaller than that of the cylinder chamber 25 so as to have an appropriate gap 29 between the cylinder chamber 25 and the inner circumferential wall 25a through which a portion of the pressure oil can pass. Internally installed, this piston 31
Lower bottom surface 31a and lower bottom portion 25 of cylinder chamber 25
A bullet 33, such as a coil spring, is clamped between it and b.

Further, the cylinder case 23 is connected to the cylinder case 23 from the lower bottom portion 25b of the cylinder chamber 25.
A through hole 35 is provided to communicate with the outside through the cylinder case 23, and a piston rod 37 is slidably inserted into the through hole 35 from the bottom of the cylinder case 23.

The upper part of the piston rod 37 is connected to the piston 31 via a fastener 39 such as a bolt, while the lower part has an integrally constructed block 41.
A plate holder 45 is attached to the bottom surface of the plate via a fastener 43 such as a bolt.

In this embodiment, the detection device 9 is incorporated in the plate holding device 7 and is configured as follows.

That is, as shown in detail in FIG. 3, a through hole 47 is provided in the plate holding tool 45, and
A large diameter recess 49 concentric with the through hole 47 is provided at the bottom of the block 41 of the piston rod 37;
Further, a small-diameter recess 51 is connected to the upper surface 49a of the large-diameter recess 49. Then, the large diameter recess 4
A sensing member 53 is slidably inserted into the sensing member 53, and a bullet 55 such as a coil spring is inserted between the upper surface 53b of the supporting portion 53a of the sensing member 53 and the upper surface 49a of the large diameter recess 49. It's pressed.

The sensing member 53 includes an upper surface 53 of the support portion 53a.
b to the contact portion 53c, and one side to the lower surface 5 of the support portion 53a.
3d has a cruciform cross-section with sensing portions 53e protruding from each other, and the sensing portions 53e
always protrudes to the outside from the through hole 47 of the plate holder 45 by an appropriate length.

Further, a proximity switch 5 is provided in the small diameter recess 51.
7 is installed inside via a locking device 59 such as a stop ring, and the upper surface 57a of this proximity switch 57
A bullet 61 such as a coil spring is clamped between the upper surface 51a of the small diameter recess 51 and the upper surface 51a of the small diameter recess 51.
A conductive wire 63 from the proximity switch 57 passes through the block 41 from the small diameter recess 51 and is taken out to the outside via a through hole 65 communicating with the outside, and its end is connected to the timer T. Said timer T
A time limit contact T _a that closes for a certain period of time and then opens is connected to a solenoid valve SOL that controls the operation of a drive device 15 that moves the ram 13 up and down.

In this embodiment, a plurality of plate holding devices 7 are used.
are arranged side by side in the order of plate holding devices 7 ₁ , 7 ₂ , 7 ₃ . . . 7 _o from right to left in FIG.
These plate holding devices 7 ₁ , 7 ₂ , 7 ₃ ... 7 _o ,
Detecting devices _{9 1} , 9 ₂ , 9 ₃ . _{. .} 9 _o are incorporated and provided, respectively.
...9 _o proximity switch 57 ₁ , 57 ₂ , 57 ₃ ,
. . 57 _o is connected to timers T ₁ , T ₂ , T ₃ , ...T _o , respectively, and furthermore, timers T ₁ , T ₂ , T ₃ ,
...T _o 's time-limiting contacts T ₁ a, T ₂ a, T ₃ a, ... T _o a
are connected to the solenoid valve SOL (see Figure 4).

The time settings of the timers T ₁ , T ₂ , T _{3 .} . . To satisfy T ₁ <T ₂ <T ₃ <…< _To .

Note that a notch groove 67 is provided at the front end of the table 3, that is, at a portion corresponding to the plate holding device 7.

Next, the operation of this embodiment having the above configuration will be explained.

First, the time settings of the timers T ₁ , T _{2 ,} T _{3 .}
The operating time of the drive device 15 is set to the time required to stroke the ram 13 in order to cut the plate material W of the length corresponding to the length.

For example, as shown in FIG _.
When cutting a plate material W having a length corresponding to , the plate holding devices 7 ₁ , 7 ₂ , 7 ₃ . . . 7 _o descend and press the plate material W on the table 3, and the plate holding devices The sensing members 53 of the detection devices 9 ₁ , ₉ 2 , 9 ₃ , 9 ₄ provided in the detection devices 7 ₁ , 7 ₂ , 7 ₃ , 7 ₄ are each pushed upward by the plate material W, and each contact portion 5
3c is the proximity switch 57 ₁ , 57 ₂ , 57 ₃ , 5
7 When approaching ₄ within a predetermined interval, each timer
T ₁ , T ₂ , T ₃ , and T ₄ are connected. At this time, since the set time of the timer T is T ₁ < T ₂ < T ₃ < T ₄ , the solenoid valve is closed for the time set in the timer T ₄ by closing the time limit contact T ₄ a of the timer T ₄ .
Activate SOL. and time-limiting contacts of timer T ₄
T ₄ a opens after the set time has elapsed, deenergizing the solenoid valve SOL. Therefore, timer T4
The drive device 15 operates for the set time of , and the ram 1
3 to cut the plate material W.

Note that the plate holding devices 7 ₅ , 7 ₆ . . . 7(n) detection devices 9 ₅ ,
9 ₆ ...9 _o is the notch groove 6 provided in the table 3
7 and does not receive any resistance, so it will not operate.

As can be understood from the above description of the embodiments, the gist of the present invention is as stated in the claims of the utility model registration. The amount can be automatically controlled and the efficiency of cutting work can be improved.

It should be noted that this invention is not limited to the above-mentioned embodiments, and can be implemented in modes other than the above-mentioned embodiments.

Furthermore, although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the reference numerals do not limit the technical scope of this invention.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, and FIGS. 1 and 2 are a side view and a front view of a shearing machine equipped with a ram stroke amount control device according to this invention, and FIG. 4 is an enlarged side sectional view of the main part, and FIG. 4 is an explanatory diagram of the electric circuit. Explanation of symbols representing main parts of the drawing, 7...
Plate holding device, 9...Detection device, 13...Ram, 1
5... Drive device.

Claims (1)

[Scope of utility model registration request] A ram 13 is provided which is vertically movable and has an appropriately inclined upper blade 11 for shearing the plate material W in cooperation with a horizontally long lower blade 17 mounted horizontally on a table 3 that supports the plate material W. A driving device 15 for vertically moving the ram 13 is also provided, and a plurality of detection devices 9 for detecting the presence or absence of the plate material W are arranged in the left-right direction at positions corresponding to the plate material W on the table 3. A time control device is provided to control the driving time of the drive device 15 in order to control the downward stroke amount of the ram 13 in accordance with the detected width of the horizontal direction of W, and the plurality of detection devices 9 and the time control device are connected electrically. In addition, the driving time of the drive device 15 is longer when the detection device on the sloped upper side of the upper blade 11 detects the plate material than when the sensing device on the sloped upper side detects the plate material. A ram stroke amount control device for a shearing machine, characterized in that it is configured as follows.