JPH031165Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of use This device is related to a sizing device that measures the thickness of a workpiece that has been ground into a flat surface.The workpiece has a recess at the measuring point, and the contact of the measuring head is placed in the recess. This device is designed to change the position of the sizing device when a gauge is encountered or when gauge adjustment is performed using a master gauge. Here, a recess refers to a part of a workpiece that has a hole, cutout, step, etc. at the measurement location, and refers to a state in which a contact accidentally fits into a hole or cutout or comes into contact with a step, etc. It is said that you will encounter a depression.

Conventional technology When measuring the thickness of a workpiece that has a recess at the measurement location, the direction of the workpiece that is taken out of the machine body after grinding is generally not constant, so before measuring with a sizing device, , it is necessary to change the position of the workpiece in the direction in which the thickness of the workpiece can be measured, and the transfer device must incorporate a device for changing the position of the workpiece or a direction alignment device, etc. separately from the transfer device. Such devices have the drawbacks of complex structures and high production costs.

When measuring the thickness of a workpiece having a recess with a sizing device, if the contact of the measuring head encounters the recess of the workpiece, there is no device in the prior art that changes the position of the sizing device to perform measurement. For example, special public service in the 1970s
As described in the publication No. 20299, a device for translating a sizing device parallel to the axis of a workpiece is known, and is different from a device for changing the position of the sizing device as in the present invention.

Problems to be solved by the invention In the above-mentioned conventional technology, since the direction of the workpiece carried out from the machine body after grinding is not constant, the workpiece is moved in combination with a conveyance device or a transfer device to change the position of the workpiece. A device or directional alignment device is required. In view of the drawbacks of the conventional technology such as complicated structure and high manufacturing cost, the present invention solves these problems by changing the position of the sizing device without changing the position of the workpiece. This is an attempt to resolve the issue.

Means for Solving the Problems The present invention consists of a sizing device 1 for a surface grinding machine equipped with a measuring head 2, a rotating shaft 11 orthogonal to the measurement extension plane of a workpiece W to be measured, and a 11, and the supporting stand 5 of the sizing device 1 is fixed to the upper surface of the sizing device 1.
A rotary plate 8 to which is fixed, and a fixed size base,
A bearing box 10 that rotatably supports the rotating shaft 11.
, a measuring table 16 fixed to the sizing base 9, and a drive source 13 for rotating the rotating shaft 11,
The recess V of the workpiece W placed on the measuring table 16
When the contacts 4 and 4' of the sizing device 1 encounter each other, the rotary plate 8 is rotated by the driving of the drive source 13 to a position that avoids the recess V of the workpiece W. The position of the sizing device 1 is changed, the thickness T of the workpiece W is measured, the master gauge 19 is placed on the measuring table 16', and the drive source 13 is driven by a gauge adjustment command signal. This is a position changing device for a sizing device that rotates the rotary plate 8 to change the position of the sizing device 1, and performs gauge adjustment of the sizing device 1 using the master gauge 19.

Embodiment FIG. 1 shows a partially sectional plan view of an embodiment of the present invention, and FIG. 2 is a plan view of FIG. 1. Reference numeral 1 denotes a sizing device for a double-headed surface grinder, which is equipped with a measuring head 2, and the measuring head 2 is equipped with fingers 3, 3' to which contacts 4, 4' are attached. The support stand 5 of the sizing device 1 is attached to the upper surface of the rotary plate 8, and the sizing base 9 is provided with a bearing box 10 to pivotally support the rotating shaft 11 perpendicular to the measurement extension plane of the workpiece W to be measured. The rotating plate 8 is fixed to the upper end surface of the rotating shaft 11, and the lower end of the rotating shaft 11 is rotatably connected to a drive source 13 fixed to a support stand (not shown) via a shaft coupling 12. There is. Rotating shaft 11
Dogs 14, 14' are inserted into the shaft portion 11', and corresponding position detecting means 15, 15' are attached to fixing members (not shown). A measuring stand 16 for measuring the workpiece W is attached to the upper surface of the sizing base 9. Stoppers 17, 17' are provided on the rotary plate 8,
Fixed blocks 18, 18' for positioning the rotary plate 8 during rotation are mounted on the fixed size base 9. Further, reference numeral 16' denotes a measuring table having the same height as the measuring table 16, on which a master gauge 19 for correcting the skew of the measuring head 2 is mounted. The measuring head 2 is electrically connected to a sizing amplifier 6, and
The sizing amplifier 6 is connected to a control device 7 that drives and controls the drive source 13. The device of the present invention is not limited to the measuring head 2 for the surface grinder of the embodiment, but is a sizing device without fingers 3', and measures the height of the workpiece based on the top surface of the measuring table 16. It is clear that the configuration of the device and the effects obtained are the same.

FIG. 3 shows a plan view, a sectional view, and a side view of an example of a workpiece measured by the apparatus of the present invention in figures a, b, and c, respectively. V ₁ is a hole, V ₂ is a notch, and V ₃ is a step, and the workpieces W ₁ , W ₂ ,
Represents the concavity of W ₃ . The workpiece W in FIGS. 1 and 2 shows the case shown in FIG. 3a.

Next, to explain the operation, the workpiece W is placed on the measurement table 16 from the direction of the arrow X by a transport device (not shown), and if there is no recess V at the measurement location of the workpiece W, a normal measurement operation is performed. However, there is a concave V at the measurement location.
If there is, fingers 3, 3' of measuring head 2
moves forward in the direction of arrows a and a', and contacts 4,
After the fingers 3, 3' return in the directions of arrows b and b' due to an abnormal signal when the tip of the finger 4' encounters the recess V of the workpiece W, the stopper, which has been set in advance by the drive source 13, The position of the sizing device 1 is changed by rotating the rotating plate 8 until the sizing device 17 comes into contact with the fixed block 18. At this time, the fingers 3 and 3' turn from the position where normal measurement is performed (original position A) to the position B where they avoid the recess V of the workpiece W, and when they reach this position B, the position detection means is activated by the dog 14. 15 is
An ON signal is generated, and the fingers 3, 3' advance in response to the ON signal, and the tips of the contacts 4, 4' contact both sides of the workpiece W, thereby measuring the thickness T of the workpiece W. After the measurement, the fingers 3, 3' return in the direction of the arrows b, b', and return to the original position A by driving the drive source 13.

In the embodiment, an electric motor is used as the drive source 13, but other drive means may be used.

While the fingers 3, 3' of the measuring head 2 continue the above-mentioned repeated movement of forward movement and return, a measurement error of the measuring head 2 may occur. In such a case, it is necessary to correct the skew of the measuring head, and drive the drive source 13 to the position where the master gauge 19 on the measuring table 16 is used for gauge adjustment (position C of the finger) to move the rotary plate 8. By turning, the position of the sizing device 1 is changed, and the finger 3,
3' and adjust the gauge. Reference numeral 17' denotes a stopper mounted on the rotary plate 8, which abuts against a fixed block 18' mounted on the sizing base 9 to perform positioning at this time. Gauge adjustment by this device may be performed by standalone operation or by incorporating a circuit that automatically performs gauge adjustment after measuring multiple workpieces, and
At this time, it is also possible to incorporate a circuit that automatically corrects the skew of the measuring head and use it as an auto-mastering device.

Effects The position changing device of the sizing device of the present invention provides the following effects.

After surface grinding the workpiece, a device for aligning the direction and positioning the workpiece while it is being transported, or a complicated device of conventional technology that changes the position of the workpiece after placing it on a measuring table. becomes unnecessary.
Furthermore, there is no need to manufacture a completely new conventional sizing device, and a similar device can be manufactured by additionally machining parts and arranging a few necessary parts. The device of the present invention has a compact structure and a small number of parts, so the manufacturing cost is much lower than that of the conventional technology. Gauge adjustment becomes easy, and a highly reliable and economical measuring device can be provided.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view showing an embodiment of the present invention, Fig. 2 is a plan view of Fig. 1, and Fig. 3 is a plan view, a sectional view, and a side view of an example of a workpiece having a recess. Figure A shows a workpiece with a hole, Figure B shows a workpiece with a notch, and Figure C shows a workpiece with a protrusion. 1... Sizing device, 2... Measuring head, 4, 4'
...Contact, 5...Support stand, 8...Rotating plate,
9... Sizing base, 10... Bearing box, 11... Rotating shaft, 13... Drive source, 16, 16'... Measuring stand,
19... Master gauge, W... Workpiece, V... Concavity, T... Thickness.

Claims (1)

[Claims for Utility Model Registration] (1) A sizing device for a surface grinder equipped with a measuring head, a rotating shaft perpendicular to the measurement extension plane of the workpiece to be measured, and a sizing device fixed to the upper part of the rotating shaft. , a rotating plate to which a support base of the sizing device is fixed to the upper surface; a bearing box fixed to the sizing base and rotatably supporting the rotating shaft; and a measuring table fixed to the sizing base. and a drive source that swings and drives the rotating shaft, and the drive source is driven by an abnormal signal generated when a contact of the sizing device encounters a recess of a workpiece placed on the measuring table. A position changing device for a sizing device, characterized in that the rotary plate is rotated by the sizing device to move the sizing device to a position that avoids a recessed portion of the workpiece, and the thickness of the workpiece is measured. (2) Place the master gauge on the measuring stand, and in response to a gauge adjustment command signal, drive the drive source to rotate the rotary plate, change the position of the sizing device, and use the master gauge to perform the sizing. A position converting device for a sizing device according to claim 1, characterized in that the device performs gauge adjustment of the sizing device.