JPH0731954Y2 - 2-axis touch sensor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a two-axis touch sensor adapted to transmit movements in the X and Z directions to a high precision switch via a lever-shaped member.

[Conventional technology]

A method of measuring the cutting edge size of a tool inserted in a machining center, an NC lathe or the like using dial gauges in the X and Z directions has been conventionally used. Further, a tool presetter as shown in FIG. 4 is adopted as a device for measuring the tool size in advance before inserting the tool into the machining sensor or the NC lathe and adjusting it to a predetermined value. The two-axis touch sensor of the present invention is of course applicable to tool measurement of machining centers, NC lathes, etc., but as an embodiment of the present invention, a tool measurement and adjustment method when a tool printer is used is described. As a conventional technique, measurement and adjustment of a tool in a conventional tool presetter will be described for comparison.

FIG. 4 shows a schematic structure of the tool presetter.

A tool 35 holding a cutting edge 34 as an object to be measured has its taper shank 36 held by a holding body 37, fixed by a cylinder 38, and rotatably supported by a handle 39. A slide block 42 is slidably supported by a handle 43 on a slide rail 41 on a base 40 to which the grip body 37 is fixed, and a linear scale 44 reads the amount of movement of the slide block 42 in the XX axis direction. A pillar 45 is erected on the slide block 42, and a movable body 33 is supported on the pillar 45 by a handle 46 so as to be movable in the Z-Z axis direction, and the moving amount is read by a linear scale 47. The moving body 33 holds dial gauges 48 and 49, and the contact points 50 and 51 of the dial gauges are
The cutting edge 34 is connected so as to be capable of measuring the values in the X and Z axis directions at a position where it can come into contact with the cutting edge 34, and the readings thereof are displayed by the linear scales 44 and 47 and the control means (not shown) on the X and Z axes. They are displayed in parts 24 and 25 respectively. Also counter 2
3 includes a hold circuit (for example, a circuit in which a reading value during measurement is held as it is by a signal that a contact such as a touch probe contacts the object to be measured). In addition, each handle 39, 43, 46 has a motor that automatically rotates it.
In some cases, the motors 52, 53, 54 are connected to each other, and the motors 52, 53, 54 are configured so that their rotation amounts are automatically controlled by a control means (not shown).

The projection screen 32 is for magnifying the contact state between the cutting edge 34 and the tracing stylus 50, 51. To measure the cutting edge 34,
Prior to that, the master spindle is inserted into the grip body 37. A reference point corresponding to a reference position is formed on the upper end of the master spindle. Insert this master pindle between the light source and the objective lens (not shown)
While aligning the reference point with the center of 32 cross lines (orthogonal cross lines), move the tracing stylus 50, 51 until it touches the reference point, and measure the values of linear scales 44, 47 at that time on the master spindle in advance. The displayed numerical value is set as a reference value in the counter and used as a reference coordinate point. Next, the master spindle is removed from the grip body 37, and the tool 35 is inserted into the grip body 37 as shown in FIG. Rotate the handle 39 and insert the cutting edge 3 against the dial cage 48, 49 side.
After positioning 4 at the most protruding position, and positioning it at the center point of the projection screen 32, dial gauge 48,4
Put the contact points 50, 51 of 9 against the cutting edge 34 and read the values of the dial gauges 48, 49 at this position to adjust the cutting edge 3
It is possible to measure the values of 4 in the X and Z directions. Next, by a moving mechanism (not shown) for moving the cutting edge 34 (which may be a manual operation), the cutting edge 34 is moved by the above-mentioned measured value so that the required tool size is obtained, whereby the accurate cutting edge adjustment work is performed.

[Problems to be solved by the device]

As described above, in the tool presetter having the above-mentioned general structure, the measurement and adjustment work of the cutting edge 34 itself is performed by the projection screen.
It was necessary to manually adjust the 32 and dial gauges 48, 49 while visually checking, and there was a problem that skill was required for measurement and adjustment. Further, not only the tool presetter but also a tool inserted in a machining center or an NC lathe to measure and adjust using a dial gauge causes the same problem.

[Means for Solving the Problems]

A lever-shaped member having an intermediate point rotatably and elastically supported on the fixed side of the device, an X-axis plane terminal and a Z-axis plane terminal arranged orthogonally to one end side thereof, and the lever-shaped member. An X-direction contactor and a Z-direction contactor which are disposed on the other end side of the member and engage with the fixed X-direction high-precision switch and the Z-direction high-precision switch, and fixed so as to be detachably engaged with the lever-shaped member. A two-axis touch sensor is provided which is disposed on the side and is provided with a reference position setting gauge that holds the lever-shaped member in the reference direction when engaged. Further, the Z-axis plane terminal is supported by the lever-shaped member so as to be movable along the X-axis direction and rotatably supported.

[Action]

When the object to be measured comes into contact with the X-axis plane terminal and the Z-axis plane terminal, the lever-shaped member swings about its lever base point, which causes the lever-shaped member to momentarily engage the X-direction and Z-direction high-precision switches. To meet. Further, since the lever-shaped member receives the elastic reaction force at the lever base point, even if overrun occurs, it does not adversely affect the high-precision switch side. Therefore, no skill is required for measurement. Further, since the lever-shaped member is held vertically by the reference setting gauge prior to use, the X-axis plane terminal and the Z-axis plane terminal are accurately positioned while maintaining the orthogonal state during measurement.

〔Example〕

The structure of the main part of this embodiment will be described with reference to FIGS. 1 and 2.

The lever-shaped member 1 is supported by a plate spring 3 on a fixed-side bracket 2 that is fixed to a moving body 33 described later. More specifically, the leaf spring 3 is arranged in the direction of 45 degrees, and the leaf spring fulcrum A is formed by the support members 4 and 5 whose tips are formed at acute angles. That is, the lever-shaped member 1 is held by the bracket 2 so as to perform a lever movement with the leaf spring fulcrum A as a base point.

An X-axis plane terminal 6 and a Z-axis plane terminal 7 having a super hard member on the tip end surface thereof are provided at one end of the level-shaped member 1 at right angles to each other. Among these, the X-axis flat terminal 6 is fixed to the lever-shaped member 1 as it is, and a seat surface 10 with which the contact 9 of the dial indicator 8 abuts is provided on the rear side. On the other hand, the Z-axis plane terminal 7 is fixed to the slide block 11,
As shown in FIG. 2, the slide block 11 is slidably supported in an angular broach groove 12 provided in the lever-shaped member 1. The angular broach groove 12 forms an opening in one direction thereof. Further, the slide block 11 has a long hole 13 formed therein, and the slide block 11 is attached to the lever-shaped member 1 by bolts 14.
It is formed so that it can be rotated about the bolt 14 by fixing it to any position and pulling it in the left direction in the drawing. This is to keep the Z-axis plane terminal 7 away from the measurement surface when the Z-axis plane terminal 7 is unnecessary, and to facilitate measurement in the X-axis direction.

An X-direction contact 15 and a Z-direction contact 16 are fixed to the other end of the lever-shaped member 1, and a reference position setting gauge 17 is attached to the other end.
Engage as if the lever-shaped member 1 is sandwiched.

X direction high precision switch 18 and Z direction high precision switch 19
Are mutually fixed to the slide member 20, and their tips are in contact with the X-direction and Z-direction contacts 15 and 16, respectively. The X-direction and Z-direction high-accuracy switches 18 and 19 are provided with indicator lights 21 and 22 for displaying a contact or a moment when the contact is separated.

The slide portion 20 is slidably supported by the block 2 and is supported by a spring 26 so as to support the X-direction and Z-direction contacts 15,1.
It is urged to press to the 6 side. Z direction contact 16
A ring-shaped member 27 is provided so as to be fixed to the lever-shaped member 1 by surrounding it. The ring-shaped member 27 is arranged with a certain gap from the block portion 20 so that the Z-direction contactor 16 does not give a shock to the Z-direction high precision switch 19 when the lever-shaped member 1 overruns.

As shown in FIG. 2, the reference position setting gauge 17 is rotatably supported by the bracket 2 via a pin 28, and its cross section is formed in a U shape as shown in FIG. 2 to sandwich the lever-shaped member 1. Is formed. The surface on one side of the U-shaped cross section forms a reference surface 29, and when the lever-shaped member 1 contacts the reference surface 29, the lever-shaped member 1 is precisely finished so as to be held vertically in the Z direction. . Further, a disc spring 30 is provided on the surface facing the reference surface 29 to press the lever-shaped member 1 toward the reference surface 29. The solid line in Fig. 2 is the reference position setting gauge.
17 shows the state fitted to the lever-shaped member 1, and the chain double-dashed line shows the state where the reference position setting gauge 17 rotates 180 degrees around the pin 28 to release the clamp.

A projector support pipe 31 for supporting a projection screen 32 is fixed to the bracket 2. FIG. 3 shows a case where the biaxial touch sensor having the above structure is used for a tool pre-setter.

In FIG. 3, the same reference numerals as those in FIG. 4 indicate the same things or those having the same functions, and the description thereof will be omitted.

The bracket 2 of the biaxial touch sensor is fixed to the moving body 33. The X-direction and Z-direction high-precision switches 18 and 19 are connected to the hold circuit of the counter 23, respectively. Indicators 21, 2 are provided on the X-axis display section 24 and the Z-axis display section 25 of the counter 23.
2 is turned on, that is, the X-direction contact 15 is separated from the X-direction high precision switch 18, and the Z-direction contact is Z
Direction high-precision linear scale at the moment of contact with switch 19
The value of 44,47 is displayed. More specifically, the cutting edge 3
When 4 contacts the X-axis plane terminal 6, the lever-shaped member 1 rotates counterclockwise about the leaf spring fulcrum A, and the X-direction contactor 15 moves in the X-direction.
Attempts to move away from the directional precision switch 18. The hold circuit is configured to hold at this moment of separation, and the indicator lamp 21 is also configured to light up at this moment.
On the other hand, when the cutting edge 34 comes into contact with the Z-axis planar terminal 7, the lever-shaped member 1 rotates clockwise, and the Z-direction contact 16 moves in the direction of contacting the Z-direction high-precision switch 19. The hold circuit operates at the moment of contact, and the indicator lamp 22 is also turned on.

Next, the operation of this embodiment used for the tool presetter will be described in more detail.

First, the adjustment of the reference values by the master spindle will be described.

Cover the other end of the lever-shaped member 1 with the reference position setting gauge 17,
The lever member 1 is held vertically by the reference surface 29. In this state, the X-axis plane terminal 6 and the Z-axis plane terminal 7 are kept horizontal and vertical. The slide block 11 is moved according to the size of the tool 35 to move the Z-axis plane terminal 7 to an appropriate position, and fixed by the bolt 14. Insert the master spindle into the grip body 37, and insert the X-axis plane terminal 6 into the edge of the master spindle.
And the Z-axis plane terminal 7 is aligned and the zero point of the dial indicator 8 is aligned. Here, the X-axis plane terminal 6 and the Z-axis plane terminal 7 are once moved slightly in the escape direction, and the reference position setting gauge 17 is removed from the lever-shaped member 1. After pressing the hold button of the counter 23 to set the hold circuit, the X-axis plane terminal 6 and the Z-axis plane terminal 7 are again applied to the edge portion of the master spindle. Since the lever-shaped member is supported at its base point, the moment of contact is accurately transmitted to the X-direction and Z-direction contacts and engaged with the respective high-precision switches. The values at the moment when the X-direction contactor 15 and the X-direction high-precision switch 18 are separated and at the moment when the Z-direction contactor 15 and the Z-direction high-accuracy switch 19 are contacted are held through the X-axis display section 24 of the counter 23 and the Z-axis. It is displayed on the display unit 25. This is the standard size. As a precaution, repeat the same operation again to check whether the reference dimension setting has been performed securely.

Next, measurement of the cutting edge 34 of the tool 35 will be described.

With the X-axis plane terminal 6 and the Z-axis plane terminal 7 missing, the master spindle is removed from the grip body 37, and the tool 35 to be measured is inserted. The tool 35 is visually rotated by the handle 39 so that the cutting edge 34 faces the measurement position. Counter 23
To the holding state, move the X-axis plane terminal 6 and the Z-axis plane terminal 7 and stop the X-axis plane terminal 6 about 1 mm before the cutting edge 34. First, slowly lower only the Z-axis plane terminal 7 to the cutting edge 34. Press the Z-axis flat terminal 7. Z direction contact 16
Touches the Z direction high precision switch 19, and the value in the Z direction at that time is held and displayed on the counter 23 at the moment when the indicator light 22 is turned on. Even if an overrun occurs, the hold state does not change, and as described above, the ring-shaped member 27 abuts the slide member 20 and moves it, but the block member
20 is elastically supported by a spring 26, and a high-precision switch in the Z direction 19
Does not adversely affect. Next, similarly, slowly move the X-axis plane terminal 6 so that the X-direction contactor 15 becomes the X-direction high precision switch.
When the indicator lamp 21 lights up from 18 and the indicator 25 of the counter 25
The value in the X-axis direction is displayed on and is held. In this state, the tool 35 is rotated by the handle 39 and it is confirmed whether or not the reading of the dial indicator 8 indicates the maximum value. There is no problem in the case of the maximum value, but if it is found that the value is not the maximum value due to rotation, the X-axis plane terminal 6 is returned once and the value in the X-axis direction is read again, or the dial indicator 8 indicates the previously held value. The true value may be calculated by adding the error values.

Next, a method of adjusting the cutting edge 34 will be described.

Place the X-axis plane terminal 6 and the Z-axis plane terminal 7 at the target positions by the linear scales 44 and 47 in both the X and Z directions,
If the cutting edge 34 of the tool 35 is moved in the X-axis direction and the Z-axis direction and the moment when the indicator lights 21 and 22 are turned on is confirmed, the value becomes a predetermined dimension. After setting, move in the X direction again and check the dimensions.

The dial indicator 8 is used when a slight adjustment of the cutting edge is required in the X direction. It is possible to match the position of the cutting edge 34 with the reference dimension by finding the difference between the reference dimension and the actual tool 35 during holding, and observing the scale of the dial indicator 8 and moving the cutting edge 34 by this difference value. As a precaution, it is necessary to once miss the X-axis plane terminal 6 and check again.

In the case of a tool having a slanting edge and a portion higher than the position where the Z-axis plane terminal 7 abuts, use the projection screen 32, fix the reference position setting gauge 17, and measure in the same direction as the conventional while observing the projected image. To do. However, in this case, it is necessary to pull out the slide block 11 of the Z-axis plane terminal 7 and rotate it so that the Z-axis plane terminal does not get in the way.

Although the case where the handles 39, 43, 46 and the like are manually operated has been described above, it is of course possible to measure and adjust using the motors 52, 53, 54. In this case, the motor operates at a low speed and is controlled so that the motor stop command can be issued by lighting the contact signals (indicator lights 21 and 22) of the X-direction and Z-direction high-precision switches 18 and 19.

When the diameter and length of the tool 35 to be measured are known in advance, the motor can be fed at high speed in the X and Z directions to the front as if it contacts the X-axis plane terminal 6 and the Z-axis plane terminal 7, which is efficient. It is possible to measure and adjust.

In this embodiment, the lever-shaped member 1 is elastically supported by using the leaf springs 3, but the present invention is not limited to this. For example, the lever base point of the lever-shaped member 1 is used as the pin base point, and the spring is attached from the fixed side. A structure for elastically supporting the lever-shaped member 1 or another elastic supporting structure is adopted.

[Effect of device]

As is clear from the above description, according to the present invention, it is possible to perform the tool measurement and the tool adjustment with high accuracy and high efficiency without requiring the skill of the operator and without causing the individual difference of the operator. , The effect that can be easily applied as a tool measuring and adjusting tool for existing tool presetters, machining centers and NC lathes is enhanced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the main part structure of the present embodiment, FIG. 2 is a plan view taken along the arrow III in FIG. 2, and FIG. 3 is an overall configuration diagram when the embodiment is used as a tool presetter. FIG. 4 is a block diagram showing a schematic structure of a conventional tool presetter. 1 ... Lever-shaped member, 2 ... Bracket, 3 ... Leaf spring,
A ... Leaf spring fulcrum, 4,5 ... Support member, 6 ... X-axis plane terminal, 7 ... Z-axis plane terminal, 8 ... Dial indicator, 9 ... Contact, 10 ... Seating surface, 11 …… Slide block, 12 …… Square brooch groove, 13 …… Oval hole, 14 …… Bolt, 15 …… X direction contactor, 16 …… Z direction contactor, 17 ……
Reference position setting gauge, 18 ... High-precision switch in X direction, 19
...... Z direction high precision switch, 20 …… Slide member, 21,2
2 …… Indicator, 23 …… Counter, 24 …… X-axis display, 25
...... Z axis display, 26 ...... Spring, 27 ...... Ring member, 28
...... Pin, 29 ...... Reference plane, 30 ...... Disc spring, 31 ...... Projector support pipe, 32 ...... Projection screen, 33 ...... Movable body,
34 …… Blade edge, 35 …… Tool, 36 …… Taper shank, 37…
… Grip body, 38 …… Cylinder, 39,43,46 …… Handle,
40 …… Base, 41,43 …… Slide rail, 42 …… Slide block, 44,47 …… Linear scale, 45 …… Pillar, 4
8,49 …… Dial gauge, 50,51 …… Stylus, 52,53,54
……motor.

Claims (1)

[Scope of utility model registration request] 1. An intermediate point of the device is rotatably attached to a fixed side of the device.
And a lever-shaped member that is elastically supported, an X-axis plane terminal and a Z-axis plane terminal that are arranged at one end side thereof at right angles to each other, and a fixed-side X-direction height that is arranged at the other end side of the lever-shaped member. An X-direction contactor and a Z-direction contactor that engage with the precision switch and the Z-direction high-accuracy switch are arranged on the fixed side so as to be detachably engaged with the lever-shaped member, and the lever-shaped member is used as a reference during engagement. A two-axis shaft having a reference position setting gauge for holding in a direction, the Z-axis plane terminal is movably supported along the X-axis direction, and rotatably supported by the lever-shaped member. Touch sensor.