JP2848770B2 - Material level detector for processing machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in the wood processing industry and the like, and is used for a processing machine capable of easily and reliably detecting the position of a material surface to be processed even if there is a change in the height of the material. The present invention relates to a material level detecting device.

[0002]

2. Description of the Related Art At present, automation of various processing of building materials for wooden houses has been advanced due to the emergence of numerically controllable equipment and the like. In the wood processing industry, for example, in the processing of horizontal members such as bases, In the processing of joints such as joists and fire beams, automatic cutting by driving data into a control panel has come to be performed.

[0003] For example, as shown in FIG.
When applying joist carving 51 to one side of the material 50, the cutting device
Since the machine origin p, which is 52, is a reference for cutting, the cutter 53 is lowered to the surface of the material 50, and the machine origin p and the material
The distance x from the 50 surfaces was calculated in advance, and the numerical value of x + h to which the cutting depth h for machining was added was input to a control panel (not shown).

Alternatively, since the dimension Z between the reference plane q on the lower surface of the material on which the material 50 is placed and the machine origin p is set in advance at the time of machine fabrication, first, when the measured material height H is input, Z By -H, the distance x between the machine origin p and the material surface is obtained, and a predetermined cutting amount can be obtained by inputting the cutting depth h for processing.

In the former case of machining by these methods, if the material height H is different, the distance x between the mechanical origin p and the material surface must be recalculated every time.
The work is extremely troublesome, and it is necessary to accurately determine the position where the cutting edge of the blade contacts the material surface.Therefore, due to a mistake in the confirmation, the finished processing accuracy may decrease, and in the construction industry, There was a drawback that the foundation and joists were insufficient due to poor dimensions.

In the latter case, since the height of the material must be accurately measured in advance, the operation is troublesome, and the measurement is insufficient, or the actual processing is performed with the measured position. If there is a dimensional difference from the place to be performed, the finished processing accuracy of the product may be reduced or the product may be defective.

In particular, wood is often warped in the longitudinal direction, and when a pre-measured material is attached to a vise, an error occurs in the height from the machine origin, which is also processed. Cause a defect. And other various problems.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and is directed to a processing machine for gripping a material and performing predetermined processing by processing means. A body is provided with an advancing / retracting means, and an abutment body for attaching to a material surface is attached to a tip portion of the advancing / retreating means, and the advancing / retreating means is provided with a first detecting means and a second detecting means. An object of the present invention is to provide a material level detecting device for a processing machine that can accurately detect a material level or the like at a processing position even when a change or variation occurs.

[0009]

Means of the present invention for achieving the above object are a means for gripping a material provided on a machine base and a means for feeding and retracting the machine to the machine so as to correspond to the material. A processing machine comprising a processing means attached to a moving body to be engaged, an advance / retreat means provided on the moving body,
An abutting body against a material surface attached to the tip of the advance / retreat means;
First detecting means attached to the reciprocating means for detecting contact of the contact body fed by the feeding means with the material surface; and a contact position between the tip of the processing means provided on the reciprocating means and the material surface. And the second retracting means is an air cylinder, the sending side supply pressure of the contact body attached to the tip of the rod is lower than the withdrawal side supply pressure. Material surface detector for processing machine set.

[0010]

The present invention configured as described above has the following effects.

In a state where the material to be processed is fixed to the gripping means, and the contact body is extended by the reciprocating means,
When the moving body to which the processing means is attached is sent out toward the material surface by the feeding means, the end face of the contacting body of the advancing / retreating means attached to the moving body comes into contact with the material surface.

When the moving body, that is, the abutting body is sent out by operating the feeding means, this operation causes
In order to perform the action of stagnating the contact body that is in contact with the material surface, the first detection means provided in the moving forward and backward means is operated to detect that the contact body has detected the material surface, By this signal, the moving speed of the moving body by the feeding means is reduced to be lower than the conventional moving speed.

When the feeding of the moving body by the feeding means is further continued, the second detecting means provided on the moving advancing / retreating means is operated due to the stagnation of the abutting body which has come into contact with the material surface, and the processing tip of the processing means is processed. And the upper surface of the material matched, that is,
The cutting origin is detected, and a predetermined cutting amount is given to the feeding means based on the processing data set in advance with this signal as a starting point, so that accurate processing is performed by the processing means.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a material level detecting device for a processing machine according to the present invention will be described with reference to the drawings.

Material level detecting device A which is an embodiment of the present invention
Is used in the processing machine B shown in FIGS. 3 and 4, and this processing machine B is, for example, a cutting machine for a joint or a joint in the woodworking industry, and has a gripping means 1 and a processing means 2 And

The gripping means 1 is provided on one side of the machine base 3 to firmly fix the material w. A pair of gripping means 1 is provided on both sides of the processing means 2 so that the material w can be moved forward and backward. The pressing members 4 and 5 to be sandwiched are mounted so that they can be opened and closed by operating members 6 and 7 such as air cylinders.

The pair of left and right gripping means 1, 1
Can be alternately fed in a fixed state in the longitudinal direction of the material w in a gripping state. In this case, the processing means 2
Operating members 6a, 7a such as air cylinders
The gripping means 1 provided with the pressing members 4a and 5a which can be opened and closed freely may be attached.

The material w is movably and horizontally laid horizontally by a transfer member 8 such as a roller mounted on an upper portion of one side of the machine base 3.

The above-mentioned processing means 2 performs processing such as cutting, polishing or drilling on the material w, and in this embodiment, performs processing such as connections and joints on the building material. A motor 9 and a blade object such as a bit drill, a groove and a mortise cutter supported on a rotating shaft 10 of the motor 9.
11

In mounting the processing means 2, a holder 14 is engaged with the horizontal guide 12 on the other side of the machine base 1 so as to be reciprocally movable by a reciprocating means 13 such as a servomotor. Operation means such as a servomotor is attached to the holder 14.
A support 16 which is moved back and forth by 15 is mounted.

Further, a moving body 20 which can move forward and backward by a feeding means 19 comprising a servo motor 17 and a screw shaft 18 rotated by the servo motor 17 is engaged with the support 16. A motor base 21 to which the motor 9 is fixed is provided at the front side of the vertical guide 22 so as to be able to move up and down.

In order to raise and lower the motor base 21, a raising / lowering means 23 such as a fluid cylinder attached to the moving body 20 is used, and the motor base 21 is linked to the tip of the rod 24. As shown in FIG. 3 and FIG. 3, when a plurality of processing means 2 are provided with a plurality of heads of blade objects 11 of different forms, these processing means 2 and 2 can be arbitrarily selected according to the use state of the blade object 11. Which is
The processing means 2 to be used is extended downward by the operation of the elevating means 23, and the selected blade object 11 corresponds to the material w.

The material level detecting device A, which is an embodiment of the present invention, comprises an advancing / retreating means 25, a contact body 26, a first detecting means
27 and a second detecting means 28.

The reciprocating means 25 uses an air cylinder to move the cylinder portion of the moving body 20 so that the rod 29 is fed downward, that is, to the surface of the material w1 fixed to the gripping means 1. It is attached to the front side, and the contact body 26 is attached to the lower end portion via the intermediate connecting rod 30.

The connecting rod 30 is stably held by rod receiving members 31 provided on the moving body 20 so as not to swing back and forth and right and left.

The advancing / retreating means 25 is such that the supply pressure on the delivery side 32 of the contact member 26 attached to the tip of the rod is set lower than the supply pressure on the retraction side 33. 1.5Kgf / cm ² , pressure side 32
Set the retraction side 33 to 6 kgf / cm ² . In addition, this numerical value is not specifically limited.

Therefore, by this setting, the feeding means 19
As a result, the moving body 20 is extended, and the contact body 26 comes into contact with the surface of the material w, so that a regulating force for lowering is applied to the contact body 26, that is, a stopping force is applied.

Further, when the moving body 20 descends, this apparent upward force acts on the contact body 26, and the internal pressure in the cylinder on the delivery side 32 tends to increase.

However, the supply pressure on the delivery side 32 is set lower than the supply pressure on the retraction side 33, that is, the supply pressure on the delivery side 32 is set relatively low at 1.5 kgf / cm ^2. Therefore, when the piston in the cylinder moves (actually, the cylinder descends), there is a margin in the internal air compression, which does not give a large movement resistance. The rising internal pressure in the cylinder can be suppressed as much as possible,
Can be moved and evacuated.

In particular, by setting the retraction side 33 to 6 kgf / cm ² , a high pressure is applied when air is supplied to the retraction side 33, and the responsiveness of the movement of the internal piston (cylinder) is improved.

As the first detecting means 27 and the second detecting means 28, conventional reed switches or the like which are attached to the cylinder portion of the reciprocating means 25 and react to a magnet attached to the piston can be employed.

The first detecting means 27 detects the contact of the material w of the contact body 26 fed by the feed means 19 with the upper surface, and is turned on when the rod 29 is fully fed.
When the piston rises due to the shortening of the rod 29, an OFF signal is issued,
The feed speed of the servo motor 17 in the feed means 19 is converted to a low speed.

The second detecting means 28 is for detecting the contact position between the tip of the processing means 2 and the surface of the material w, and is provided slightly above the first detecting means 27 so as to be inward of the rod 29. When the piston moves up and reaches the position of the second detecting means 28, an ON signal is issued to detect the position where the tip of the blade object 11 and the upper surface of the material w coincide, that is, the machining origin. I do.

Therefore, the control means 34 which has received the signal of the origin, based on the processing data inputted in advance,
By giving an instruction of the number of rotations or the rotation angle to the servo motor 17 of the feeding means 19, desired processing can be performed accurately and automatically.

The first detecting means 27 and the second detecting means 28 correspond to the cylinder portion of the forward / backward means 25 and the rod 29.
Since the relative movement of the (piston) is detected, a photoelectric tube, a proximity switch, a limit switch and the like corresponding to the rod 29 and the abutment body 26 at appropriate positions may be attached to the moving body 20. .

In FIG. 3, reference numeral 35 denotes a marker means such as a laser corresponding to the blackening applied to the material w, which emits visible light such as red light to irradiate the surface of the material w, and the blade of the processing means 2 on the material w The position of the material w is set with respect to the position.

Next, the operation of the apparatus according to the embodiment of the present invention will be described.

The material w is fed onto the transfer member 8, the processing position is determined by the marker means 35, and the material w is fixed to the holding means 1, 1.

After inputting the processing data to the control means 34, the rod 29 is pushed out by operating the advance / retreat means 25 and the contact body 26 is extended to the maximum, and the first detection means 27 is operated to control this signal. The lower surface of the contact body 26 projects further downward than the cutting edge of the blade object 11 in the lowering means 2.

In this state, the moving body 20 is moved
When lowered by the servo motor 17,
The blade body 11 of the motor 9 and the contact body 26 of the reciprocating means 23 are made of a material w.
Sent out toward the surface.

At this time, since the servo motor 17 of the feeding means 19 is operated at a relatively high speed, the moving time is short.

When the lower end surface of the contact member 26 comes into contact with the upper surface of the material w by the sending out by the servo motor 17, the first detecting means 27 changes from the ON state to the OFF state, and this signal is sent to the control means 34. The servo motor 17 which has been sent and operated at high speed is switched to low speed operation, and its moving operation changes to fine movement.

On the other hand, since the contact member 26 is in contact with the surface of the material w, its lowering is suppressed, and at the same time, the moving member 20 is pushed back as much as it descends. Moves.

The moving body 20 by the servo motor 17
Is further continued, the movement of the rod 29 accompanying the lowering of the moving body 20 causes the piston to move further and correspond to the next second detecting means 28.
When turned on, the upper surface of the blade material w of the blade object 11 is matched, that is, the cutting origin is detected.

At this time, since the extension of the moving body 20 is a low-speed fine movement operation of the servo motor 17, there is no overrun due to the inertial movement of the moving body 20, and the detection position of the second detecting means 28 is accurately captured. As a result, the processing origin can be obtained with high accuracy.

Therefore, this signal is sent to the control means 34, the feed amount to the servomotor 17 is made according to the preset processing data, and the desired cutting is performed accurately by the blade object 11.

Further, the detection by the second detecting means 28
Since the advancing / retreating means 25 is operated and the contact body 26 is retracted, it does not hinder the processing of the material w by the blade object 11.

As described above, when processing the material w, the upper surface of the material w is used as a reference for processing. Therefore, the reference is always constant even if the material height changes.
The input of the processing data to 34 may be only the processing amount for the material w.

In this embodiment, since the processing start surface is from the upper surface, the processing origin is detected with reference to the upper surface of the material w. However, even if the processing start surface is the side surface or the lower surface of the material w, The same operation as described above can be performed, and in this case, the configuration of the processing machine B corresponding to the surface is necessary.

[0050]

According to the present invention configured as described above, even if the height of the material to be processed changes variously, the material processing is
Since the operation can be performed with a simple operation of inputting only the processing amount to the material, the operation is extremely simplified, the operation efficiency is improved, and not only the operation skill is unnecessary, but also the material As a reference, even if there is a dimensional variation in the height direction of the material, there is no adverse effect on the processing.

In particular, since the machining origin of the material surface is detected at the machining position of the machining means, the reliability of the set machining origin value is improved as much as possible.

Since the supply air pressure on the delivery side is set lower than the supply air pressure on the retraction side, there is room for internal air compression when the piston in the cylinder moves (actually, the cylinder descends). It does not give a large movement resistance, so that the rising internal pressure in the cylinder due to the inward movement of the rod can be suppressed as much as possible, and the contact body can easily move and retreat. And so on.

[Brief description of the drawings]

FIG. 1 is a front view of a main portion schematically showing an embodiment of a material level detecting device for a processing machine according to the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a front view of a processing machine employing the apparatus in FIG.

FIG. 4 is a plan view of FIG.

FIG. 5 is an explanatory view showing a method for detecting a material surface in a conventional processing machine.

[Explanation of symbols]

 w Material 1 Gripping means 2 Processing means 3 Machine base B Processing machine 19 Feeding means 20 Moving body 25 Advance / retreat means 26 Contact body 27 First detection means 28 Second detection means

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B27C 9/00 B27F 1/00 B27F 1/08 B27C 5/06 B23H 7/36

Claims (1)

(57) [Claims] 1. A processing machine comprising: a gripping means for a material provided on a machine base; and a processing means attached to a moving body which is movably engaged with the machine by a feeding means so as to advance and retreat to the machine. An advancing / retreating means provided on the moving body, an abutting body to a material surface attached to a tip end of the advancing / retreating means, and an abutting body attached to the advancing / retreating means to a material surface of the abutting body fed by a feeding means A first detecting means for detecting the contact, and a second detecting means provided in the retreating means for detecting the contact position between the tip of the processing means and the material surface, wherein the reciprocating means is an air cylinder. A feed-side supply pressure of the contact body attached to the tip of the rod is set to be lower than a retraction-side supply pressure.