JP2522796B2 - Saw cutter bend detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Industrial field of application) The present invention relates to a saw bending detection device, and more particularly, to a work bending during cutting of a workpiece in a saw. The present invention relates to a bend detection device for detecting.

(Prior Art) As a means for detecting the bending of a work during cutting of a work in a horizontal band saw, for example, as a saw, the locus of the band saw blade that has entered the work cannot be directly measured during cutting. Therefore, the displacement of the band saw blade protruding outside the work is measured.

That is, from the saw blade guide device which is the reference surface of the band saw blade,
The displacement of the saw blade is measured at a certain distance. The saw blade guide device of the insert part that grips the band saw blade is as close as possible to the work, but in order to avoid interference with the movable vice, especially in the case of hinge type band saw machine, in order to avoid interference with the work, it is necessary to bend The detection device must be separated from the work to some extent.

(Problems to be solved by the invention) By the way, the bending detection device attached to the saw blade guide device cannot measure the displacement of the band saw blade at a position as close as possible to the work, and the measurement accuracy is so bad. , It was not possible to detect the exact amount of bending.

In order to improve the above problems, an object of the present invention is to position the displacement sensor of the cutting / bending detection device at a position as close as possible to the cutting surface of the workpiece and to detect the cutting amount of the saw machine which is capable of accurately detecting the cutting amount. It is to provide a bend detection device.

[Structure of Invention]

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a bend detecting device on a movable vice of a vise device for gripping and fixing a work on a saw machine, and provides the bend detecting device. A saw bending detection device is constructed which is movable in the vertical direction so as to set the displacement sensor near the maximum cutting width of the work.

(Operation) By adopting the present invention, since the movable vice provided with the bending detection device always grips and fixes the work during cutting of the work, the displacement sensor of the bending detection device is located at the closest position to the work. It can be positioned and the displacement of the saw blade can be measured. Moreover, the displacement sensor of the bending detection device is movable in the vertical direction so as to be set near the maximum cutting width of the work together with the movement of the movable visor, so the displacement sensor can easily be used for the maximum cutting width of the work. Can be set in the vicinity, and the accurate amount of bending can be measured.

(Example) Hereinafter, the Example of this invention is described in detail based on drawing.

Referring to FIG. 1, a horizontal band saw machine 1, which is an example of a saw machine, generally includes a box-shaped base 3 and a saw blade housing 5, and the saw blade housing 5 includes a hinge pin 7. It is rotatably supported on the base 3 through the vertical direction. A work table 9 on which the work W to be cut is placed is provided on the base 3, and the work table 9 is provided with a fixed vise jaw 11f and a movable vise jaw 11m that can hold and fix the work W. The vice device 11 is attached.

The saw blade housing 5 is provided with housing parts 13 and 15, and the housing parts 13 and 15 are integrally connected by a beam member 17, and a control box 19 is provided on the beam member 17. There is.

In the housing portions 13 and 15 of the saw blade housing 5, a driving wheel 21 and a driven wheel 23 are provided on shafts 25 and 27, respectively.
It is rotatably installed via. An endless band saw blade 29 wound around the drive wheel 21 and the driven wheel 23.
In order to easily attach / detach and replace the driven wheel 23, the driven wheel 23 is provided so as to be movable and adjustable in a direction of approaching and separating from the drive wheel 21. Although details are not shown, as is well known, the movement of the driven wheel 23 is adjusted by rotating the tension handle 31 rotatably provided on the housing 15.

The band saw blade 29 is guided and held by the fixed guide arm 33 and the movable guide arm 35 with the cutting edge vertically shifted, so that in the cutting region of the horizontal band saw machine 1, between the guide arms 33, 35. A cut portion is formed. The guide arms 33 and 35 are supported by a guide member 37 fixed to the beam member 17, and a lower end portion thereof has a saw for vertically twisting and guiding a band saw blade 29 as described later. Blade guide devices 39 and 41 are provided respectively. The fixed guide arm 33 is fixedly supported by the guide member 37,
The movable guide arm 35 is supported so that its position can be adjusted and fixed in a direction toward and away from the fixed guide arm 33 in order to adjust the cut portion of the band saw blade 29 according to the size of the work W to be cut.

The saw blade housing 5 has a band saw blade 29 with respect to the work W.
In order to cut in and to separate the band saw blade 29 from the work W, the hydraulic cylinder 45 provided with the piston rod 43 is actuated to swing vertically around the hinge pin 7. That is, when pressure oil is supplied to the hydraulic cylinder 45, the saw blade housing 5 rises, and by removing the pressure oil from the hydraulic cylinder 45, the hydraulic housing 5 is lowered by its own weight and the work W is cut. It will be.

A vice device 11 for holding and fixing the work W is attached to the work table 9. More specifically, as shown in FIGS. 2 to 3, a vice bed 11B of the vice device 11 is provided on the work table 9. A fixed vice jaw 11f is integrally fixed to the right side of the vice bed 11B.

At one end of the groove 11G formed in the vice bed 11B,
In FIG. 2, a rack 47 extending in the left-right direction is provided. Moreover, a pinion 49 meshing with the rack 47 is provided at one end of the vice bed 11B. Slide plates 51 are attached to both sides of the upper surface of the vise bed 11B so as to extend in the left-right direction in FIG. A moving cylinder 53 for moving the movable vice 11m is provided on the left side of the vise bed 11B in FIG. 2, and the tip of the piston rod 55 of the moving cylinder 53 has a pin 57.
And is attached to one end of the movable visor 11m.

With the above configuration, when the moving cylinder 53 is operated,
The piston rod 55 moves to the right in FIG. 2, the movable vice jaw 11m approaches the fixed vice jaw 11f, and the work W
Will be gripped and fixed.

When the moving cylinder 53 is activated and the piston rod 55 moves leftward from the state shown in FIG. 2, the movable visor 11
The m is separated from the fixed vice jaw 11f, and the work W is in the non-grasping state.

At the axial center of the pinion 49, one end of a shaft 59 extending in the left-right direction in FIG. 3 is mounted, and the shaft 59 is rotatably supported on the lower part of the movable visor 11m. A hole 11H extending vertically in FIG. 3 is formed near the work W side of the movable vice 11m. A bevel gear 61 is fitted on the shaft 59 below the hole 11H, and a bevel gear 63 for changing the rotation direction by 90 degrees is meshed with the bevel gear 61.

One end of a ball screw 65 extending vertically in FIG. 3 is attached to the bevel gear 63, and the other end of the ball screw 65 is attached to the movable bisjo 11m.
It is connected to the speed reducer 69 via 7. The ball screw 65 is rotatably supported by the movable vice 11m. A potentiometer 71 is attached to the speed reducer 69.

As shown in FIGS. 3 and 4, the ball screw 65 is screwed with the detecting portion holder 75 of the bend detecting device 73. Moreover, a distance non-contact sensor 77 as a displacement sensor is attached to the detection unit holder 75.

With the above structure, when the movable vice 11m moves closer to the fixed vice 11f, the shaft 59 is rotated via the rack 47 and the pinion 49. When the shaft 59 is rotated, the rotation is transmitted to the ball screw 65 via the bevel gears 61 and 63. Turn detection device when the ball screw 65 rotates
The non-contact sensor 77 is moved up and down via the detection unit holder 75 of 73. Therefore, the non-contact sensor 77 is positioned near the maximum cutting width of the work W,
The work W is particularly effective for detection when the maximum bending occurs at the center of the round bar.

The distance due to the vertical movement of the non-contact distance sensor 77
It is detected by the potentiometer 71 attached to the 69, and especially when the work W is a round bar, the bend detection device 73 is corrected according to the diameter.

Although the distance non-contact type sensor 77 is used as the above-mentioned displacement sensor, for example, an actuated transformation type displacement sensor 79 as a contact type sensor shown in FIG. 5 may be used. In this case, the movable iron core moving actuator 81 may cause the stylus 83 to project to the right in FIG. When using this contact sensor,
When the band saw blade 29 descends to the position where the cutting length is longest, the contact type sensor is controlled so as to contact the body of the band saw blade 29. The position of the band saw blade 29 can be detected by a hinge angle or a scale for height position detection. By inputting the dimensions of the work W, it is possible to know at which position the band saw blade 29 has the longest cutting length.

As shown in FIG. 4, in the case of the work W, especially the round bar material, the maximum bending occurs at the center of the work W,
The saw blade guide device 41 as a starting point tends to extend in a mountain shape and curve. Since the mounting position of the non-contact sensor 77 is predetermined, the amount of bending is calculated from the similar triangle.

Next, the operation of the bend detection device 73 is shown in FIG. In FIG. 6, the displacement with the band saw blade 29 is input to the detection unit 79 by the non-contact displacement sensor 77. A widening unit 81 is connected to the detecting unit 79, and the input data input to the detecting unit 79 is widened. The input data widened by the widening device 81 is taken into the work width correcting section 83, and the correction value from the potentiometer 71 is taken in and the correction processing is performed.

The bending amount corrected by the work width correcting unit 83 is displayed on the bending display unit 85. Next, when the cutting amount is sent to the control unit 87 and the cutting signal is received to perform a judgment process between the cutting amount and the allowable cutting amount, and the cutting amount exceeds the allowable cutting amount, a timer After a certain period of time, the output relay 89 stops the saw board 1.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes.

〔The invention's effect〕

As can be understood from the above description of the embodiments, according to the present invention, the movable vice jaw always holds and fixes the work during cutting of the work. Therefore, the displacement sensor of the bending detection device provided in the movable vice jaw is fixed. Can measure the saw blade displacement by positioning it at the closest position to the work. Moreover, the displacement sensor of the bending detection device can be moved up and down along with the movement of the movable visor to set it near the maximum cutting width of the workpiece. Can be set to, and it is possible to accurately measure the amount of bending.

[Brief description of drawings]

FIG. 1 is a front view of a horizontal band saw machine as a saw machine according to one embodiment of the present invention. 2 is an enlarged view of an arrow II portion in FIG. 1, FIG. 3 is an enlarged sectional view taken along the line III-III in FIG. 2, and FIG. 4 is an enlarged view of an arrow portion IV in FIG. Is. FIG. 5 is a sectional view showing an example of the contact type sensor, and FIG. 6 is an operation explanatory view of the bend detection device. 1 …… Horizontal band saw machine, 11 …… Vise device 11f …… Fixed vice jo 11m …… Movable vice jo, 29 …… Band saw blade 39,41 …… Band blade guide device 71 …… Potentiometer 73 …… Cut detection device 77 …… Distance non-contact sensor

Claims (2)

(57) [Claims] 1. A bending detection device is provided on a movable side vice of a vise device for gripping and fixing a work in a saw machine, and a displacement sensor provided in the bending detection device is set near the maximum cutting width of the work. A saw bending detection device characterized by being movable in the vertical direction. 2. The bending detection device for a saw according to claim 1, wherein the displacement sensor of the bending detection device is movable in the vertical direction in conjunction with the movement of the movable visor. .