JPH0276677A - Dimension monitoring device for work in grinding - Google Patents

Abstract

PURPOSE:To prevent an unacceptably finished article of products from being forwarded to the next process by allowing the grinding process to judge whether or not works sent from the foregoing process are acceptable. CONSTITUTION:A timer 1 is furnished between an automatic sizing the device 5 and a grinder element feeding mechanism 3. In case a grinding completed signal, fine grinding completed signal, or sizing signal is emitted within a short time of this timer 1 after the grinder rest is advanced by the mentioned feeding mechanism 3, these signals are judged to be error signal, and the feeding of the grinder rest is stopped. Thus grinding of a work 4 by the grinder element 2 is interrupted, and at this stage, unacceptable articles are removed for prevention of forwarding to the next process.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is applicable to a workpiece with insufficient grinding allowance, which remains poorly ground.
This invention relates to a device for monitoring workpiece dimensions in grinding processing, which prevents the workpiece from flowing to the next process.

[Prior Art] Normally, a workpiece with a circular cross section that is input into the grinding process after the previous process is provided with an appropriate grinding allowance of about φ0.3 mm to 0.4 mm.

FIGS. 2 and 3 show a normal grinding process, in which the grindstone 2 is rapidly advanced to the vicinity of the workpiece 4 by the grindstone feed mechanism 3 and reaches the position of point A. The period between point A and point 8 is a so-called air cutting process, which is to prevent the rapidly advanced grindstone 2 from accidentally colliding with the workpiece 4. point B and point C
The period in between is the rough grinding process, in which rough grinding is performed with appropriate machining allowance.

Next, in the precision grinding process, the area between point C and the point is approximately φ0.05II.
Fine grinding of I11 is performed. Furthermore, the grinding wheel 2 stops at the point and enters the so-called spark-out process, reaching approximately φ0.
．． Grinding is performed to 0Imm to finish the grinding to a fixed size, and thereafter it will rapidly retreat.

As shown in FIG. 2, the outer diameter of the workpiece 4 is measured by the automatic sizing device 5, and the grindstone 2 is moved to the rough grinding completion position (point C), the fine grinding completion position (point D), and the sizing grinding completion position ( It is configured to output a signal to the signal generator 6 when the point O) and the above-mentioned points A1 and B are reached. The signal generator 6 sends a signal to the grindstone feeding mechanism 3 based on the output signal to change the feeding speed of the grindstone 2 or cause it to stop, move rapidly forward, or move rapidly backward.

[Problems to be Solved by the Invention] In a turning process which is a pre-process to a grinding process, a workpiece may be erroneously cut to a size larger than a predetermined size. for example,
When a workpiece that has already been pre-processed to a predetermined size is sent to the grinding process, the automatic sizing device 5 will issue a precision grinding completion signal, a sizing signal, etc.

However, some of the workpieces that have been turned in the previous process are distorted, and unground parts called so-called black scales may remain. Even though the product is defective, if the precision grinding completion signal or sizing signal is erroneously issued as described above, it will be assumed that the correct grinding work has been completed, and the defective product will be sent to the next process. will be sent to.

In order to prevent such a situation, measures such as installing a dimension measuring device on the previous process side or installing a special device on the automatic sizing device 5 to prevent black scale from remaining on the workpiece are available. is possible, but there is a problem because it would be expensive.

The present invention has been made in order to solve the above-mentioned conventional problems, and monitors workpiece dimensions in grinding processing to prevent one defective product from being sent to the next process by mistake when defective grinding products are sent. The technical challenge is to provide a device.

[Means for Solving the Problem] As a means for solving this technical problem, the present invention includes an automatic sizing device that measures the outer diameter of a workpiece to be ground, and provides a rough grinding completion signal and a fine grinding completion signal. In a grinding machine configured to change the feed speed of a grinding wheel via a grindstone feed mechanism in response to a signal from a signal generator that issues a signal, a sizing signal, etc., the automatic sizing device and the grindstone feed mechanism are combined. A timer is provided in between, and if all or any one of the rough grinding completion signal, fine grinding completion signal, and sizing signal is issued within an extremely short predetermined time of the timer after the grinding wheel head moves forward, the grinding wheel is activated. The gist is that the feeding operation is stopped and the workpiece is not ground.

[Function] Rough grinding and fine grinding require a certain amount of processing time, so if a rough grinding completion signal, fine grinding completion signal, or sizing signal is issued within a shorter time, those signals will be It is possible to determine that the signal is an erroneous signal, eliminate the defective product at this stage, and prevent it from being sent to the next process without grinding the workpiece.

[Example 7] The present invention will be explained in more detail with reference to the illustrated embodiments, and the same members as those in the conventional example are designated by the same reference numerals.

In FIG. 1, a timer 1 is provided between the automatic sizing device 5 and the grinding feed mechanism 3, and is set to operate for a very short time of about 1 to 2 seconds. It is configured to be able to confirm whether all or part of the rough grinding completion signal, fine grinding completion signal, and sizing signal have been issued from the automatic sizing device 5.

Suppose that the diameter is 0 in the previous process for the normal grinding completed dimension.
．． If a workpiece that has been ground too much by about 0.4 mm is input, the automatic sizing device measures the outer diameter of the workpiece and immediately issues a rough grinding completion signal. In other words, the rough grinding completion signal is issued within 1 to 2 seconds of the timer 1, and it can be seen that this signal is an abnormal signal.

In addition, if a workpiece that has been ground down by 0.05 mm in diameter over the specified size is input, both a rough grinding completion signal and a fine grinding completion signal are issued, and the When a workpiece that has been cut too much is input, all signals including the sizing signal will be emitted. Such a workpiece is a defective product, which is determined by the operation of the timer 1, and is eliminated at this point, so that it is not sent to the next process.

On the other hand, if none of the above-mentioned erroneous signals are generated, rough grinding, fine grinding, and spout-out processing are performed in the conventional manner according to the regular grinding process. In this way, the automatic sizing device is simply provided with a timer, and no other special equipment is required, making it possible to implement the process simply and inexpensively.

[Effects of the Invention] As explained above, according to the present invention, by identifying defective products in the workpieces sent from the previous process in the grinding process, it is possible to prevent the defective products from being sent to the next process. It has excellent effects, such as being able to prevent this problem and being able to provide it at a low cost.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention, FIG. 2 is an explanatory diagram showing a grinding process, and FIG. 3 is a graph diagram similarly explaining the grinding process. 1... Timer 2... Grinding wheel 3... Grinding wheel feeding mechanism 4... Workpiece 5... Automatic sizing device
6...Signal generator patent applicant Mitsui Seiki Kogyo Co., Ltd.),' Agent 9''''Ki□:''f:j Nagisa (1 other person) Ginma→

Claims (1)

[Claims] Equipped with an automatic sizing device that measures the outer diameter of the workpiece to be ground, the grinding wheel is moved through the grinding wheel feed mechanism by signals from a signal generator that issues rough grinding completion signals, fine grinding completion signals, sizing signals, etc. In a grinding machine configured to change the feed rate, a timer is provided between the automatic sizing device and the grindstone feeding mechanism, and the rough grinding completion signal is output within an extremely short predetermined time of the timer after the grindstone head moves forward. , when all or any one of the precision grinding completion signal and the sizing signal are issued, the feeding operation of the grindstone is stopped and the workpiece is not ground. monitoring equipment.