JP2002090135A - Measuring method and measuring device for work width - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an erroneous measurement by adhesion of chips or the like in the measurement of the work width of a perforated work such as a gear after machining or the like. SOLUTION: The gear W is set on a work receiving jig 3, and air is blown onto the lower surface, upper surface and side surface of the gear W from a third air feeding part 17 formed within the work receiving jig 3 and first and second air feeding parts 28 and 29 arranged on the sides of the work receiving jig 3, whereby foreign matters on the upper surface and lower surface are removed while rotating the gear W in a floating state. The feed of air is then stopped to place the gear W on a reference part 8, a measuring jig 4 is lowered, and a measuring element 21 is allowed to abut on the upper surface of the gear W while pressing the gear W by a work pressing pin 20 to measure the work width. When the measurement value is abnormal, the same operation is repeated several times, and when a normal value cannot be obtained even if the operation is performed a prescribed number of frequency, the work is judged to be defective.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for measuring a tooth width of a gear ground by, for example, a gear grinder.

[0002]

2. Description of the Related Art Conventionally, as shown in, for example, JP-A-5-111851, a measuring element is mounted on a grindstone holder of a gear grinding machine with NC, and the measuring element is brought into direct contact with a processing portion of the gear. Techniques are known that measure the waveform, tooth traces, gear pitch, etc. without removing the gear from the grinding machine.However, in such a method, chips are adhered to the gear, resulting in inaccurate measurement. In general, the measurement of the tooth width of the gear is performed by air blowing in the previous process to remove chips and the like, and then, in the next process, placing the gear on the three-point reference portion of the work receiving jig, Measurement is performed by bringing a probe into contact with a plurality of locations on the upper surface to determine the tooth width.

[0003]

However, when air is blown onto a gear and placed on the work receiving jig, if chips or the like remain on the lower surface, the gear on the work receiving jig is inclined and the gear on the upper surface is inclined. If chips are attached, the result of measurement by the measuring element may vary, and may be treated as a defective gear. Then, the gears determined to be defective gears are aligned and held on the side line, and when a certain amount is reached, an alarm is issued and the device is stopped, and then the worker re-measures the width of the defective gears. The measuring device is operated, and if the product is defective, inspection of the device in the previous process is performed.However, at present, most of the measurement is performed by a worker who measures the tooth width, and most of the products are good. there were.

[0004] Therefore, an object of the present invention is to prevent the erroneous measurement due to the attachment of chips or the like in measuring the work width of a perforated work such as a gear after machining and improve the operation rate.

[0005]

In order to achieve the above object, the present invention provides a method for inserting a perforated work into a positioning pin of a work receiving jig and lowering the lower surface of the work with respect to a mounting surface of the work receiving jig. In a work width measurement method in which a work piece is placed on a work piece and the work piece of a measuring jig is brought into contact with the upper surface of the work to measure the work width, air is blown toward the upper surface, the lower surface, and the side surface of the work. By rotating the work on the work receiving jig in a floating state, the foreign matter on the upper and lower surfaces is removed at the same time, then, the blowing of air is stopped, the work is placed on the reference part, and then the measuring jig is lowered. Then, the probe was brought into contact with the upper surface of the work to measure the work width.

By blowing air toward the upper surface, side surface, and lower surface of the work in this way, the work is rotated in a floating state, and foreign matter and the like on the upper and lower surfaces are blown off to remove the work. If the measurement is performed while the measurement is performed, the measurement can be efficiently performed while preventing the erroneous measurement due to the adhesion of the foreign matter or the like.

Here, since the upper surface of the work is a place where the tracing stylus abuts, and the lower surface is a place where the reference part abuts.
The air blown toward the upper and lower surfaces of the work removes foreign substances and the like attached to the upper and lower surfaces, and the air blown on the lower surface slightly lifts the work to a floating state. The work is rotated by the air blown to the side of the work. By rotating the work in this way, foreign matters and the like can be removed over the entire upper surface and lower surface, and thereafter, the measurement is performed without moving the work, which is efficient.

According to a second aspect of the present invention, when it is determined that there is an abnormality as a result of the measurement by the above method, the measuring jig is raised and air is blown again to rotate the work in a floating state, thereby removing foreign matter on the upper and lower surfaces. After the removal, the measurement was performed again. If the measurement was repeated a predetermined number of times, the product was determined to be defective if the product was defective.

As described above, the measurement accuracy can be improved by repeating the work of removing foreign substances and the like and the re-determination. For example, the number of re-determinations is set to two or three times, and this is automated, and It is convenient if the setting of the number of re-determinations can be easily changed and adjusted.

According to a third aspect of the present invention, the upper surface of the work is pressed by the reference portion of the mounting surface for supporting the lower surface of the perforated work and the upper part of the work receiving jig provided with the positioning pins for positioning the work. In a work width measuring device in which a measuring jig provided with a work holding means and a measuring element capable of contacting the upper surface of the work can be moved up and down, the work receiving jig is directed to the upper and side surfaces of the work. And the first and second air supply sections that can blow air by
The second air supply unit that blows air to the side surface of the work can blow air in a direction deviated to one side from the axis of the work, and the work receiving jig has a standard. A third air supply unit capable of blowing air from a side edge of the portion toward the lower surface of the work is provided.

With such an apparatus configuration, the above-described measuring method can be suitably performed.

[0012]

Embodiments of the present invention will be described with reference to the accompanying drawings. Here, FIG. 1 is a longitudinal sectional view of a work width measuring device according to the present invention, FIG. 2 is a plan view of a work receiving jig, and FIG. 3 is a bottom view of the measuring jig.

The work width measuring device according to the present invention removes foreign matter such as cutting chips adhering to a measurement site or a mounting site of the gear when measuring the tooth width after processing the gear with, for example, a gear grinding machine. By doing so, the erroneous measurement is prevented and the operation rate is improved.
It will be described based on.

The work width measuring apparatus 1 includes a work receiving jig 3 mounted on a base 2 and a measuring jig 4 disposed above the work receiving jig 3 and capable of moving up and down by a driving device (not shown). And the mounting surface 7a of the work receiving jig 3
The work width is measured by bringing the tracing stylus 21 of the measuring jig 4 into contact with the upper surface of the gear W mounted on the reference portion 8 of the first embodiment.

A screw hole 2a is formed in the base 2,
The shaft portion 5 of the work receiving jig 3 is screwed into the screw hole 2a.

The work receiving jig 3 is provided with the screw hole 2a.
And a large diameter portion 6 above the shaft portion 5 and a small diameter portion 7 above the shaft portion 5. The upper surface of the small diameter portion 7 has a mounting surface 7.
a, and three convex reference portions 8 are provided on the mounting surface 7a at equal intervals in the circumferential direction. A female screw hole 9 is formed in the center of the mounting surface 7a in the vertical direction, and a jig-side stopper pin 10 as a positioning pin is screwed into the female screw hole 9 so as to be located above the mounting surface 7a. It is protruding.

A vertical hole 12 is formed at the center of the shaft 5 upward from the lower surface, and a manifold 13 is formed at a boundary between the vertical hole 12 and the female screw portion 9. At the same time, three horizontal holes 14 are opened in the horizontal direction from the manifold portion 13 to below the reference portion 8, and oblique holes are formed from the middle of the horizontal holes 14 toward the side edges of the reference portion 8. 15 have been established. The opening of the horizontal hole 14 is sealed with a blind screw 16.

A communication passage communicating from the vertical hole 12 through the manifold 13 to the horizontal hole 14 and the oblique hole 15 is formed as a third passage.
An air supply unit 17 is provided so that air sent from the vertical hole 12 is blown out from the side edges of the three reference portions 8.

The measurement jig 4 has a measurement side stopper pin 1 at the center corresponding to the position of the jig side stopper pin 10.
As shown in FIG. 3, the work holding pins 20 as work holding means are arranged at equal intervals on the same circumference.
And the tracing stylus 21 are provided alternately at three locations.

The work holding pin 20 includes a large-diameter portion 22 at an intermediate portion and a guide pin 23 at a base end.
It is inserted into a hole 26 formed in the measuring jig 4 via a spring 24 so as to be movable forward and backward.
Are guided and slid by the inner surface of the collar 25 provided inside the hole 26.

On the front surface of the measuring jig 4, a stopper plate 2 which is fastened together by a measuring-side stopper pin 18 is provided.
7 are provided to regulate the projecting amount of the work holding pin 20.

A first air supply pipe 28 as a first air supply section and a second air supply pipe 29 as a second air supply section are provided on the side of the work receiving jig 3. ing. The first air supply pipe 28 is capable of blowing air toward the peripheral edge of the upper surface of the gear W set on the work receiving jig 3, and the second air supply pipe 29 is configured as shown in FIG. As shown in FIG. 3, air can be blown out horizontally toward the large-diameter tooth portion Wa on the side surface of the gear W and in a direction slightly shifted from the axis of the gear W.

A method for measuring the work width by the work width measuring apparatus 1 as described above will be described. The gear W is mounted on the reference portion 8 of the mounting surface 7a of the work receiving jig 3 and air is supplied from the first, second, and third air supply portions 28, 29, and 17 so that the gear W The W is in a floating state slightly raised from the reference portion 8 and starts rotating, and at the same time, chips and the like adhering to the upper surface of the gear 8 and the lower surface where the reference portion 8 abuts are removed.

Next, the supply of air is stopped, the gear W is placed on the three-point reference portion 8, and the measuring jig 4 is lowered to lower the jig-side stopper pin 10 and the measuring-side stopper pin 18
, And at the same time, the gear W is pressed downward by the work holding pin 20, and further, the tracing stylus 21 is brought into contact with the upper surface of the gear W to make the work width (distance between the tip of the reference portion 8 and the tip of the tracing stylus 21). Is measured.

At this time, if the measurement result is abnormal,
After raising the measuring jig 4 and again supplying air from the first, second, and third air supply units 28, 29, and 17 to rotate the gear W in a floating state and remove chips and the like, Perform re-measurement. If the re-measurement is not successful even if the re-measurement is repeated a predetermined number of times, it is determined that the product is defective, and the alignment is suspended on a side line, and such a measurement method is automated. Also, the number of re-measurements can be easily changed.

With the above-described measuring method, it is possible to prevent the apparatus from being stopped due to erroneous determination as in the related art, and to improve the operation rate.

The present invention is not limited to the above embodiment. Those having substantially the same configuration as those described in the claims of the present invention and exhibiting the same operation and effect belong to the technical scope of the present invention. For example, the work may be a perforated work other than the gear.

[0028]

As described above, in the work width measuring method according to the present invention, a perforated work is inserted into the positioning pins of the work receiving jig and placed on the reference portion, and the upper, lower, and side surfaces of the work are measured. Because the workpiece on the work receiving jig is rotated in a floating state by blowing air toward, and the foreign matter on the upper and lower surfaces is removed, the measuring jig is lowered to measure the work width. Foreign matter such as chips attached to the workpiece is efficiently removed over the entire area,
Erroneous measurement hardly occurs. In this case, when it is determined that the abnormality is abnormal, the same procedure is repeated several times to further improve the measurement accuracy, and for example, it is efficient if automated. The measuring method can be suitably performed by the apparatus configuration as described in claim 3.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a work width measuring device according to the present invention.

FIG. 2 is a plan view of a work receiving jig.

FIG. 3 is a bottom view of the measuring jig.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Work width measuring device, 3 ... Work receiving jig, 4 ... Measuring jig, 7a ... Mounting surface, 8 ... Reference part, 17 ... Third air supply part, 20 ... Work holding pin, 21 ... Measuring element , 28 ... first
Air supply unit, 29: second air supply unit, W: gear.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Mikinori Matsui 1907, Hirata-cho, Suzuka-shi, Mie F-term in Honda Motor Co., Ltd. Suzuka Works 2F069 AA42 AA49 BB40 CC03 DD13 DD16 DD25 GG01 GG52 GG64 GG77 JJ06 LL02 LL03 MM02 PP02 RR01 RR07 3C029 BB02

Claims (3)

[Claims] 1. A perforated work is inserted through a positioning pin of a work receiving jig, and the work is mounted on a reference portion of a mounting surface of the work receiving jig. A work width measuring method in which a work piece is measured by contacting a measuring element, wherein air is blown toward an upper surface, a lower surface, and a side surface of the work so that the work on the work receiving jig is in a floating state. Rotate at the same time to remove foreign matter etc. on the upper and lower surfaces, then stop blowing air and place the work on the reference part, then lower the measuring jig and place the tracing stylus on the upper surface of the work A method for measuring a work width, wherein the work width is measured by contacting the work. 2. The work width measuring method according to claim 1, wherein when it is determined that the work is abnormal as a result of the measurement by the method, the measuring jig is raised and air is blown again to float the work in a floating state. A method for measuring a work width, characterized in that, after rotating and removing foreign matter and the like on the upper and lower surfaces, measurement is performed again, and if the measurement is repeated a predetermined number of times, the work is determined to be defective if the measurement is defective. 3. A work presser for pressing an upper surface of a work with a reference portion of a mounting surface for supporting a lower surface of a perforated work and a work receiving jig provided with a positioning pin for positioning the work. Means, a work width measuring device in which a measuring jig provided with a stylus capable of contacting the upper surface of the work can be moved up and down, and beside the work receiving jig, the upper surface and the side surface of the work First and second air supply units that can blow air toward the work are provided, and the second air supply unit that blows air to the side surface of the work is deviated to one side from the axis of the work. The work receiving jig is provided with a third air capable of blowing air from a side edge of the reference portion toward a lower surface of the work. Work width measurement characterized by having a feeding section Setting device.