JP2895613B2 - Material positioning device - Google Patents

Description

Description: Object of the Invention (Industrial application field) The present invention relates to a material positioning device used for a cutting device such as a band saw machine, and in particular, a sizing for setting a sizing of a cutting length. The present invention relates to a material positioning device used for material feeding control.

(Prior Art) In order to automatically cut a long material into a predetermined cutting length variably set by a cutting device such as a band saw machine, a cutting position (processing position) of the material by a feeding device such as a feeding vise device. ) Is carried out while measuring the moving amount of the material itself or the material feeding vise device which kumps the material with a measuring device,
When the measuring device detects that the material itself or the Ito amount of the material feeding device has reached a predetermined value, it is determined that the material has been fed to the cutting position with a feeding amount corresponding to a required cutting length. Dimensioning material control has been performed conventionally.

In the sizing material control as described above, the sizing material feeding system recognizes the initial position of a new material at the time of delivery of the material to the cutting device or the like as the feed origin position of the sizing material. There is a need.

In view of this, in a cutting device such as a band sawing machine, a material vice device or a material feeding vise device which is fixedly arranged at a position adjacent to the cutting position when these are in a closed state is used. A positioning contact surface against which the leading end surface abuts is provided, the material is fed forward in the feeding direction by a material feeding vise device or another feeding device, and the leading end surface is positioned at the main body vice device or a predetermined reference position. The new material is positioned at a fixed feed origin position determined by the position of the positioning contact surface as an initial position by abutting the positioning contact surface of the material feeding vise device. The sizing feed control is performed while measuring the feeding amount of the material with respect to the cutting position by the measuring device using the material feeding device.

(Problems to be Solved by the Invention) In the fixed-size feeding control as described above, the starting point of the material is moved by moving the material and abutting the front end surface of the material against the stationary contact surface. Is performed, the positioning contact surface receives an impact force due to the inertial force due to the movement of the material during the positioning. Therefore, from the viewpoint of protection of the positioning hitting surface, it is necessary to reduce the moving speed at the time of abutting the material against the positioning hitting surface to an extremely low value so that a large impact force does not occur at the time of hitting. This increases the loss time and reduces the operating rate of a processing device such as a cutting device.

Further, even if the moving speed at the time of abutting the material against the positioning contact surface is set to an extremely low value, the positioning contact surface does not receive the impact force due to the inertial force due to the movement of the material. Inevitably, there is a problem in the durability of the material.If the material is heavy, no matter how low the moving speed of the material at the time of abutment is set, a large impact force is applied to the positioning contact surface. Work,
For this reason, the weight of the positionable material was limited.

The present invention has been made in consideration of the above-described problems in the positioning of a material in the conventional sizing material control, and the positioning contact surface does not receive an impact force due to an inertial force due to the movement of the material. It is an object of the present invention to provide a material positioning device capable of accurately positioning a heavy material without limiting the weight of a possible material, and capable of high-speed processing without lowering the operation rate of a processing device. And

[Constitution of the Invention] (Means for Solving the Problems) As described above, according to the present invention, a material is selectively clamped and reciprocated in a material feeding direction in a material feeding direction ahead of a material processing position. A first vice device having a positioning contact surface that is provided so as to be able to selectively contact the tip surface of the material,
A second vice device for selectively clamping the material in the material feeding direction behind the processing position, and a moving position of the first vise device in the material feeding direction relative to a fixed processing reference position for material positioning. Measuring means for measuring as a position, wherein the movement of the first vice device causes the positioning contact surface to abut on the tip end surface of the material clamped to the second vise device, whereby the material This is achieved by a material positioning device, which is configured to perform initial positioning with respect to a processing reference position.

(Operation) According to the above-described configuration, the positioning contact surface moves and is clamped by the second vice device and abuts on the front end surface of the stationary material, thereby setting the initial position of the material relative to the processing reference position. Is performed, and the sane position of the material is recognized as a deviation amount from the processing reference position based on the measured value of the measuring means.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 5 shows an example of a band sawing machine to which the material positioning device according to the present invention is applied. The band saw machine is the base 1
And a saw blade housing 5 that is pivotally connected at one end to the base 1 by the pivot 3 and that can rotate substantially vertically about the pivot 3. An endless band saw blade 7 rotates in the saw blade housing 5 between a pair of wheels 9 and 11.

A cutting movement is given to the band saw blade 7 by rotating the saw blade housing 5 in the descending direction, and the band saw blade 7 is guided in a vertical direction by a pair of left and right saw blade guide members 13 attached to the saw blade housing 5 so as to be mounted on the base 1. The material to be cut M clamped by the main body vise device 15 is cut vertically.

The saw blade guide member 13 has a guide arm 17 whose upper end is fixedly connected to the saw blade housing 5.
As shown in FIG. 5, a pair of saw side guide blocks 19 are provided at the lower end of the saw side guide block. The pair of saw side guide blocks 19 sandwich the band saw blade 7 from both sides, and guide the band saw blade 7 in the vertical direction.

FIG. 1 shows a material positioning device incorporated in a band saw machine as described above. In FIG. 1, a material to be cut (material) M crosses below the band saw blade 7 by being fed to the right, and is viewed from this crossing position, in other words, a cutting position (processing position). The cutting length is variably set by controlling the amount of feeding in the right side in the material feeding direction.

The aforementioned main body vice device 15 is disposed behind the cutting position in the material feeding direction to form a second vice device, which is clamped by a substantially fixed reference side vice jaw 21 and a hydraulic cylinder device 23. It has a movable vice jaw 25 driven between the position and the unclamping position, and selectively clamps the workpiece M.

A front vise device 27 which is a first vise device is provided forward of the cutting position in the material feeding direction. The front vise device 27 is entirely guided by the guide portion 29 and is capable of reciprocating in the material feeding direction, that is, in the left-right direction in the drawing. A hydraulic cylinder device 31 is drivingly connected to the front vise device 27, and the hydraulic cylinder device 31 reciprocates the front vise device 27 in the material feeding direction.

The front vice device 27 includes a movable vice jaw 37 driven between a clamp position and an unclamped position by a substantially fixed reference side vice jaw 33 and a hydraulic cylinder device 35.
The material to be cut M is selectively clamped, and the material to be cut M is fed by the movement of the fluid pressure cylinder device 31 in the material feeding direction.

On the cutting position side of the movable vice jaw 37, a positioning contact surface 39 is formed so as to protrude. Contact surface for positioning 39
1 is clamped to the main body vice device 15 when the movable vice jaw 37 is in the fully closed position where the movable vice jaw 37 contacts the reference side vice jaw 33 as shown by a virtual line in FIG. It faces the tip end surface of the material to be cut M and can come into contact with it.

The rotary encoder 41 is attached to the front vise device 27. A pinion 43 is attached to the rotary encoder 41, and the pinion 43 meshes with a fixed rack 45 extending in the material feeding direction, and rotates with the movement of the front vise device 27 in the material feeding direction. I have. Thus, the rotary encoder 41 measures the amount of movement of the front vise device 27 in the material feeding direction. The measured value signal of the rotary encoder 41 is output to the control device 47.

The control device 47 is an electric control device such as a CNC including a microcomputer, which previously recognizes a relationship between a measurement value signal from the rotary encoder 41 and a fixed processing reference position such as a cutting position. For example, a zero point setting (measurement reference position setting) of the rotary encoder 41 is performed by using a measurement value signal output from the rotary encoder 41 when the positioning contact surface 39 is at a position matching the cutting position as a zero reference signal. I have.

This allows the rotary encoder to be read by the controller 47
The measured value of 41 increases with a positive value in accordance with the movement of the front vise device 27 forward in the material feeding direction from the state where the positioning contact surface 39 is in the position matching the cutting position, and the opposite. Increases in a negative value in accordance with the movement of the front vise device 27 in the material feeding direction, and the movement position of the front vise device 27 in the material feeding direction is measured as a relative position to the cutting position.

Although not shown, the control device 47 performs sequence control of the entire band sawing machine in accordance with the contents programmed in advance, and a new material to be cut M is loaded on the band sawing machine by an external conveying means such as a crane. Then, a command to clamp this is output to the main body vice device 15 and then a fully-closed command is output to the front vise device 27, after which the positioning contact surface 39 is moved to the new workpiece M. A command to drive the front vise device 27 backward in the material feeding direction to a position where it comes into contact with the front end surface is output, and when the positioning contact surface 39 comes into contact with the front end surface of the new workpiece M, The command to drive the vise device 27 backward in the material feeding direction is released, and the measured value from the rotary encoder 41 at this time is read as the initial position of the new workpiece M and read control is performed. .
The contact of the positioning contact surface 39 with the front end surface of the new material to be cut M is caused by the fact that the front vise device 27 is prevented from moving rearward in the material feeding direction and stopped, so that the rotary encoder 41 Is detected when the measured value of stops changing.

Next, the operation of the material positioning apparatus according to the present invention will be described with reference to FIGS. First, as shown in FIG. 2, the movable vice jaw 37 located at a position distant from the reference side vice jaw 33 is moved to the closing side, and as shown in FIG. The front vise device 27 is brought into a fully closed state by making contact with the reference side vice jaw 33. Next, in this state, the front vise device 27 is moved backward in the feeding direction, that is, leftward in the drawing, and the positioning contact surface 39 is already clamped by the main body vise device 15 as shown in FIG. Then, it abuts against the front end surface of the new material to be cut M in a fixed state. At this time, the measured value from the rotary encoder 41 indicates a deviation value of the front end surface of the new workpiece M with respect to a processing reference position such as the cutting position by the band saw blade 7, and this is the initial position information of the new workpiece M. Is read as

Subsequent material feed control for the fixed-size cutting of the material to be cut M may be performed by taking in the initial position information, and this material feed may be performed by the front vise device 27 or shown in the drawing. It may not be performed by the same material feeding vise apparatus as the conventional one.

In the above, the present invention has been described in detail with respect to a specific embodiment. However, the present invention is not limited to this, and various embodiments are possible within the scope of the present invention. It will be clear to those skilled in the art.

[Effects of the Invention] As can be understood from the above description of the embodiment, according to the material positioning device of the present invention, the positioning contact surface provided in a movable vice device such as a front vise device moves. Then, this is clamped by the main body vice device or the like and comes into contact with the front end surface of the material in a stationary state, whereby the initial position of the material with respect to the processing reference position is determined. Since the positioning contact surface is recognized as a deviation value from the position, the positioning contact surface does not receive an impact force due to the inertial force due to the movement of the material at the time of initial position setting, and the inertial force due to the movement of the positioning contact surface is constant. In addition, since it is small, there is no limitation on the weight of the positionable material. From this, even heavy materials can be accurately positioned,
In addition, the contact surface for positioning can be abutted against the material at a relatively high speed, and the work of initial positioning of the material does not lower the operation rate of the processing apparatus.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment in which the material positioning device according to the present invention is applied to a band sawing machine. FIGS. 2 to 4 are explanatory views each explaining the operation of the material positioning device according to the present invention. FIG. 1 is a front view showing a band sawing machine to which a material positioning device according to the present invention is applied. DESCRIPTION OF SYMBOLS 1 ... Base, 5 ... Saw blade housing 7 ... Band saw blade, 15 ... Vise device 27 ... Front vise device 39 ... Contact surface for positioning 41 ... Rotary encoder 47 ... Control device

Claims (1)

(57) [Claims] A positioning contact surface is provided so as to be capable of selectively clamping a material and reciprocatingly moving in the material feeding direction ahead of the material processing position in the material feeding direction and capable of selectively abutting on the front end surface of the material. A first vice device having, a second vise device for selectively clamping material behind the processing position in the material feeding direction, and a moving position of the first vise device in the material feeding direction for material positioning. Measuring means for measuring as a relative position with respect to a fixed processing reference position, these positioning contact surfaces are moved to the front end surface of the material clamped by the second vise device by movement of the first vise device. A material positioning device, wherein an initial position of the material relative to the processing reference position is determined by contacting the material.