JP2650688B2 - Shearing machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a shearing machine, and more particularly, to a shearing machine provided with a plate thickness detecting device for detecting the thickness of a plate to be sheared.

(Prior Art) In a shearing machine, the clearance between the lower blade and the upper blade is generally adjusted according to the thickness of the plate material to be sheared. In order to automatically perform the above clearance adjustment, a technology for automatically detecting a plate thickness has been developed.

Conventionally, as a device for automatically detecting a plate thickness, a lowering amount of a plate holding portion in a plate holding device that presses and fixes a plate material to be sheared to a table is detected, and the plate thickness of the plate material pressed and fixed to the table is determined. This is a configuration for detecting.

(Problems to be Solved by the Invention) In the conventional configuration as described above, in order to detect the thickness of the plate material to be sheared, the plate presser is driven independently of the ram drive, and the plate presser is driven. The plate pressure is detected by detecting the stroke of the section. Therefore, there is a problem that the up-and-down movement of the ram and the operation of the plate holding device are interlocked, and it is difficult to implement the shearing machine without the function of driving only the plate holding device alone. In addition, when setting the shearing conditions after detecting the thickness of the plate material, the plate holding device must be once opened,
There was a problem that it was troublesome.

(Means for Solving the Problems) In view of the above-mentioned conventional problems, the present invention enables a ram having an upper blade, which cooperates with a lower blade mounted on a table to shear a plate material, to move up and down. And a shearing machine configured to adjust the clearance between the lower blade and the upper blade, wherein a side gauge for positioning a plate material on the table in the left-right direction is provided on the table. The gauge is provided with a swinging bracket including upper and lower arms extending in the movement path of the plate material so as to be able to swing up and down, and a lower contact that can freely contact the lower surface of the plate material is provided at the tip of the lower arm. And an upper contact that is freely contactable with the upper surface of the plate is provided at the tip of the upper arm so as to be vertically movable, and the plate is sandwiched between the lower contact and the upper contact. In addition, a plate thickness detecting device for detecting a plate thickness of the plate material in accordance with the vertical movement of the upper contact with respect to the lower contact is provided.

(Operation) With the above configuration, when the plate material to be sheared is sent to the position of the lower blade, the plate thickness detecting device provided on the side gauge detects the plate thickness. That is, the plate thickness is automatically detected at the time of feeding, regardless of the driving of the ram or the driving of the plate holding device. Therefore, the present invention can be easily implemented for a conventional shearing machine.

(Embodiment) Referring to FIG. 1, a shearing machine 1 according to the present embodiment includes a table 5 supporting a lower blade 3 and a frame 9 in which a gap 7 is formed. A ram 13 having an upper blade 11 for shearing the plate material W in cooperation with the lower blade 3 is provided so as to be movable up and down and to be able to adjust the clearance between the lower blade 3 and the upper blade 11. In addition, the frame 9 is provided with a plate holding device 15 for pressing the plate material W against the table 5, and a transfer conveyor 17 for transferring the sheared pieces in the backward direction (to the right in FIG. 1). Have been.

The position of the ram 13 is adjusted in the front-rear direction (the left-right direction in FIG. 1) by the drive of a device for vertically driving the ram 13 and the drive of a motor (not shown), so that the clearance (clearance) between the lower blade 3 and the upper blade 11 Since a device for automatically adjusting the pressure is known, the detailed description of the configurations of the ram drive device and the clearance adjustment device is omitted.

On the table 5 in the above-mentioned sharing machine 1,
Left-right direction of the plate material W (in FIG. 1, the front and back direction of the drawing)
A side gauge 19 for performing positioning of the plate material W is appropriately mounted, and a plate thickness detecting device 21 for detecting the thickness of the plate material W is mounted on the side gauge 19. The detection signal of the plate thickness detection device 21 is input to a control device (not shown).

When trying to adjust the clearance between the lower blade 3 and the upper blade 11 according to the thickness of the plate material W, in the control device,
A clearance adjustment is performed by controlling and driving a motor for adjusting the clearance based on the detection value of the thickness detecting device 21.

In the present embodiment, the plate thickness detecting device 21 is configured as follows. That is, as is clear from FIGS. 2 and 3, the C-shaped swing bracket 27 is attached to the bracket 23 attached to the side surface of the side gauge 19 via the pivot 25.
Are swingably supported in the vertical direction. Although not shown in detail, the swing bracket 27 is held at a neutral position by appropriate means such as a torsion spring so that the swing bracket 27 can swing upward or downward from the state shown in FIG. Is what it is. Above swing bracket 27
, The lower arm 27L and the upper arm 27U respectively extend below and above the side gauge 19 into the movement path of the plate W, and the tip of the lower arm 27L is freely contactable with the lower surface of the plate W. A lower roller 29 as a lower contact is rotatably supported. Also upper arm
An elevating member 33 provided rotatably with an upper roller 31 as an upper contact is supported at the tip of 27U so as to be vertically movable. A pin 35 is attached to an upper portion of the elevating member 33. The pin 35 is formed at one end of a swing arm 39 that is supported by the upper arm 27U via a pivot 37 so as to be vertically swingable. Slot or slit is engaged.

A large-diameter gear portion 41 is formed at the other end of the swing arm 39, and the gear portion 41 is screwed with a pinion gear 43. The pinion gear 43 is integrally attached to a rotating shaft 47 rotatably supported by a bearing block 45. The rotating shaft 47 is appropriately connected to a rotating shaft 51 of a swing amount detecting device 49 such as a pulse encoder. The bearing block 45 and the swing amount detecting device 49 are respectively supported by a support bracket 53, and the support bracket 53 is integrally attached to the swing bracket 27.

An elastic member 55 such as a spring is interposed between the other end of the swing arm 39 and the bearing bracket 45, and the swing arm 39 is moved counterclockwise in FIG. It is urged in the circumferential direction to press the upper roller 31 into contact with the lower roller 29.

A pinching pressure detecting device 57 for detecting that the plate material W is pinched between the rotation of the upper roller 21 and the lower roller 29 is provided. This pinching pressure detecting device 57 is composed of, for example, a proximity switch or the like, and is supported by the swing bracket 27 via a bracket 59. The clamping pressure detection device
57 detects that the swinging arm 39 has been rotated clockwise in FIG. 2 by the pressing of the plate material W between the upper and lower rollers 31 and 29, and that the plate material W has been pressed. Is to be detected.

In the configuration as described above, one side edge of the plate material W is brought into contact with the contact surface 19F of the side gauge 19 in order to send the plate material W to the shearing position by the lower blade 3 and the upper blade 11, and moves toward the shearing position. When moved, the sheet material W is located at the position of the sheet thickness detecting device 21.
Is sandwiched between rollers 31, 29 as upper and lower contacts. As described above, the upper and lower rollers 3
When one side edge of the plate material W is sandwiched between 1, 29, the upper roller
31 is pushed up by the plate thickness, and the swing arm 39 is rotated clockwise in FIG. The rotation of the swing arm 39 is immediately detected by the narrow pressure detecting device 57 and transmitted to the swing amount detecting device 49. Therefore, the swing amount detecting device 49 outputs a signal corresponding to the plate material W.

In response to the input of signals from the pinching pressure detection device 57 and the swing amount detection device 49, the control device drives a clearance adjusting motor corresponding to the thickness of the plate material W, and the lower blade 3
The clearance between the upper blade 11 and the upper blade 11 is automatically adjusted. Therefore, the clearance is always adjusted according to the thickness of the plate material W, and there is no need to adjust the clearance each time the plate material W changes.

As described above, when detecting the thickness of the plate W, the plate W
If the edge of the
Since 27 responds by swinging up and down, it is possible to accurately detect the thickness even if there is a warp.

[Effects of the Invention] As can be understood from the above description of the embodiments, in short, the present invention provides a lower blade (3) attached to a table (5).
A ram (13) provided with an upper blade (11) for shearing the plate (W) in cooperation with the lower blade (3) is provided movably up and down.
In the shearing machine configured so that the clearance between the upper blade (11) and the upper blade (11) can be adjusted, a side for positioning the plate (W) on the table (5) in the left-right direction on the table (5). A gauge (19) is provided, and a swing bracket (27) comprising upper and lower arms (27U, 27L) extending in the movement path of the plate (W) is swingable up and down on the side gauge (19). Provided as possible, the plate material (W)
The lower contact that can freely contact the lower surface of the lower arm (27
L), and an upper contact that can freely contact the upper surface of the plate material (W) is provided at the tip of the upper arm (27U) so as to be vertically movable, and the upper contact is provided by the lower contact and the upper contact. A plate material (W) is sandwiched therebetween, and a plate pressure detecting device is provided for detecting a plate thickness of the plate material (W) in response to a vertical movement of the upper contact with respect to the lower contact.

As is clear from the above configuration, in the present invention, the swing bracket is provided on the side gauge 19 provided on the table 5.
27 is provided to be able to swing up and down.
The upper and lower arms 27U and 27L of 27 extend into the movement path of the plate material W. A lower contact that can freely contact the lower surface of the plate material W is provided at the tip of the lower arm 27L, and an upper contact is provided at the tip of the upper arm 27U so as to be vertically movable. A plate thickness detection device is provided for detecting the plate thickness of the plate material W in response to the vertical movement of the upper contact with respect to the contact.

Therefore, in the present invention, when one side edge of the plate material W is positioned in contact with the side gauge 19, the plate material W is sandwiched between the upper and lower contacts, and the upper contact moves upward with respect to the lower contact. The thickness of the plate W is detected by a thickness detecting device.

Further, the detection of the plate thickness is not the full width of the plate material W but the plate thickness of one side edge, and the swing bracket 27 having the upper and lower arms 27U and 27L can swing up and down. Even if there is a slight curvature, the plate material W can be reliably sandwiched between the upper and lower contacts to accurately detect the plate thickness.

Therefore, the detection of the plate material is easy, and it can be easily carried out with respect to the conventional shearing machine, and the clearance between the lower blade and the upper blade can be easily made to correspond to the plate thickness.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a shearing machine embodying the present invention. FIG. 2 is an enlarged sectional view taken along line II-II in FIG. 1, and FIG. 3 is a plan view of FIG. 5 ... table, 3 ... lower blade, W ... plate material 11 ... upper blade, 13 ... ram 21 ... thickness detection device, 19 ... side gauge 39 ... swing arm, 49 ... swing amount Detector 57… Nipping pressure detector

Claims (1)

(57) [Claims] 1. A ram (13) having an upper blade (11) for shearing a plate (W) in cooperation with a lower blade (3) attached to a table (5) is provided so as to be vertically movable. In a shearing machine configured such that a clearance between a lower blade (3) and an upper blade (11) can be adjusted,
A side gauge (19) for positioning the plate (W) on the table (5) in the left-right direction is provided, and the side gauge (19) is provided with an upper and a lower extending in the movement path of the plate (W). A swing bracket (27) including arms (27U, 27L) is provided so as to be able to swing up and down, and a lower contact that can freely contact the lower surface of the plate (W) is provided at the tip of the lower arm (27L). A configuration in which an upper contact that can freely contact the upper surface of the plate (W) is provided at the tip of the upper arm (27U) so as to be vertically movable, and the plate (W) is sandwiched between the lower contact and the upper contact. And a plate thickness detecting device for detecting a plate thickness of the plate material (W) in response to a vertical movement of the upper contact with respect to the lower contact.