JPH0588802U - Feeding arrow movement amount confirmation device - Google Patents

Abstract

(57) [Summary] [Object] The present invention provides a feed arrow movement amount confirmation device that does not require setting of a counter in a device that confirms the movement amount of a feed arrow of a material feeding device that supplies a bar to an automatic lathe. The purpose is to [Structure] Moving amount detecting means 1 for detecting the moving amount of a feed arrow
And a storage unit 2 for storing the reference movement amount detected by the movement amount detection unit 1, and a comparison unit for comparing the reference movement amount stored in the storage unit 2 with the movement amount detected by the new machining. 3 and an abnormality detection unit 4 that outputs a feed abnormality signal when the movement amount newly detected as a result of comparison by the comparison unit 3 is out of the allowable range. Quantity confirmation device.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a feed arrow movement amount confirmation device for confirming the movement amount of a feed arrow provided in a bar feeding machine that feeds a bar to a bar processing machine, and particularly to a feed arrow movement amount that does not require setting of a counter. The present invention relates to a confirmation device.

[0002]

[Prior Art]

 In general, the bar material feeder is configured to feed the bar material for processing to the bar material processing machine (for example, an automatic lathe) side. More specifically with reference to FIG. 3, the rear end portion of the rod 12 is grasped by being inserted into a finger chuck 15 provided at the tip of the feed arrow 14 of the rod feeder 13 to hold the rod. The material is constantly pressed by the feed arrow 14 toward the bar processing machine 11 side. When processing of one part is completed, for example, in the case of a main spindle moving type automatic lathe, the parting tool 11a restrains the movement of the bar 12, and the collet chuck 11b is opened and closed and the main shaft is moved backward to move the rear part of the bar 12. After re-gripping, the rod is moved forward by advancing the main shaft by a predetermined length G (the length dimension of the product manufactured by the rod processing machine) to start the processing of the next part. The feed arrow 14 always presses the bar 12 toward the bar processing machine 11 side, so that it follows the advance of the main shaft 11b and advances by the length G.

However, if the feed arrow 14 is caught on a guide rail or the like of the bar material feeder 13, the feed arrow 14 may move only g ₁ which is shorter than the length G that it should originally move. In such a case, the fixed-spindle type automatic lathe will perform product processing with undefined dimensions, and the spindle-moving automatic lathe will not only process product with undefined dimensions, but also in the worst case. Can also cause tool damage.

Further, for example, a distance g ₂ larger than the length G which the feed arrow 14 should originally move due to some reason such as the rear end of the rod 12 coming off the finger chuck 15 of the feed arrow 14, etc. If it moves, the rotating rod 12 and the stationary feed arrow 14 come into contact with each other, which may cause an unexpected trouble.

Therefore, conventionally, the applicant senses the amount of movement of the feed arrow 14 of the bar feeder 13, and detects a movement abnormality when the movement amount is shorter or longer than a predetermined movement amount. To prevent such a situation in advance.

The conventional movement amount confirmation device counts the movement amount of the feed arrow from the start of movement of the feed arrow 14 and outputs a signal with a preset value shorter or longer than the movement set amount of the feed arrow. A timer set to operate after the elapse of the time required for the feed arrow to move beyond the preset value and a feed error by detecting that the timer has operated before the counter outputs the symbol according to the preset value. And a device for detecting.

[0007]

[Problems to be solved by the device]

 However, according to the conventional technique, a preset value must be set in the counter in advance before starting the machining work, so that when subsequently machining products of different sizes, the counter corresponding to each new product is required. There is a drawback that setting is required and as a result the work becomes complicated.

The present invention has been made in view of the above points, and an object thereof is to provide a feed arrow movement amount confirmation device that does not require setting of a counter.

[0009]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention is a device for confirming the movement amount of a feed arrow of a bar feeding machine that feeds a bar to a bar processing machine, and a movement amount detection means for detecting the movement amount of the feed arrow. A storage unit that stores the movement amount detected by the movement amount detection unit, a comparison unit that compares the movement amount stored by the storage unit with the current movement amount, and the comparison result by the comparison unit. And an anomaly detection means that outputs a feed error signal when the value is not within the allowable range.

[0010]

[Work]

 According to the present invention, first, the bar material feeder inserts a new material, the movement amount detection unit detects the movement amount of the feed arrow at a predetermined processing stage, and this is stored in the storage unit as the reference movement amount. Remember. Next, the moving amount of the feed arrow detected by the moving amount detecting unit during the subsequent new machining feed is compared with the reference moving amount stored in the storage unit by the comparing unit and is within an allowable range. To be judged.

When the feed arrow movement amount is not within the allowable range, the abnormality detection unit outputs a feed abnormality signal, and the operation of the equipment supplier is stopped by the stop device or the like.

[0012]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. The movement amount detecting device of the present invention can be applied regardless of whether the bar processing machine is a spindle moving type automatic lathe or a spindle fixed type automatic lathe. The movement amount of the feed arrow described below corresponds to the movement amount of the machine when the chuck is opened in the fixed spindle automatic lathe, and corresponds to the product length in the automatic spindle lathe.

The movement amount detecting apparatus according to the embodiment of the present invention is configured as shown in FIG. The counter 1 constitutes a movement amount detecting means for detecting the movement amount of the feed arrow. A chain 17 for pulling the blade 16 at the rear end of the feed arrow 14 shown in FIG. 3 is wound around a front sprocket (not shown), and the shaft of the sprocket is attached to a rotary encoder (not shown). It is connected. The moving amount of the feed arrow is obtained by counting the pulse signal output from the rotary encoder with the counter 1.

Reference numeral 2 denotes a storage unit that stores the reference movement amount detected by the counter 1. The reference movement amount is the movement amount during the second machining. This may be due to an abnormality in chuck grip during the first machining, but after the second machining, such an abnormality is extremely unlikely to occur, so it is assumed that the chuck will be grasping the bar material well. Is. A storage element such as a flip-flop is used as the storage unit 2.

Reference numeral 3 denotes a comparison unit that compares the reference movement amount stored in the storage unit 2 with the movement amount of the feed arrow after the third machining by the counter 1, that is, each newly detected movement amount. ..

Reference numeral 4 outputs a feed abnormality signal when the newly detected movement amount is not within the allowable range (for example, within + -20 mm) with respect to the reference movement amount as a result of comparison by the comparison unit 3. This is the abnormality detection unit. A stop device (not shown) of the bar feeder 13 is connected to the abnormality detector 4.

A control unit 5 controls the above-described operations of the counter 1, the storage unit 2, the comparison unit 3, and the abnormality detection unit 4.

Next, the operation of the embodiment of the present invention will be described based on the flowchart of FIG. First, the bar feeder 13 puts in the bar 12, performs the so-called short cut (S ₁ ) and the first machining (S ₂ ) on the tip of the bar, and then performs the second machining ( The encoder measures the amount of movement of the feed arrow at S ₃ ) and counts this with the counter 1.

Next, this movement amount counted by the counter 1 is stored in the storage unit 2 as a reference movement amount (S ₄ ). Then, each movement amount of the feed arrow newly detected by the movement amount detection unit 1 after the third machining (S ₅ ) is compared with the reference movement amount stored in the storage unit 2 by the comparison unit 3, and is allowed. It is determined it is within the range (S _6). And, if these moving amount is within the permissible range, the bar feeder operates according to the normal work movement sequence (S _7). However, either when the amount of movement is not in the acceptable range, the abnormality detection unit 4 outputs an abnormality signal feed, processing is interrupted to stop the device by the stop device (S _8).

If a so-called passing between the feed arrow 14 and the bar 12 occurs at the time of a shortcut or during the first feed, the device is stopped or an abnormal alarm is issued by a passing safety device (not shown).

The present invention is not limited to the above embodiment, but various modifications can be made within the scope of technical matters described in the scope of claims for utility model registration. For example, the reference movement amount is not limited to the movement amount at the time of the second machining, and may be the movement amount of the feed arrow at the time of arbitrary machining after the third machining. Further, the abnormality detector 4 may be connected to an alarm device (not shown), and the alarm device may be configured to issue an alarm when the abnormality detector 4 outputs a sending abnormality signal.

[0022]

[Effect of the device]

 The present invention is directed to a moving amount detecting means for detecting a moving amount of a feed arrow, a storing means for storing a reference moving amount detected by the moving amount detecting means, and a reference moving amount and a new moving amount stored in the storing means. Comparing means for comparing the movement amount detected by various machining, and abnormality detecting means for outputting a feed error signal if the newly detected movement amount is outside the allowable range as a result of comparison by the comparison means. Therefore, it is not necessary to set a preset value in the counter in advance before starting the machining work, and even when subsequently machining products with different dimensions, it is not necessary to set the counter according to each new product. , Work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of an embodiment of the present invention.

FIG. 3 is a schematic diagram of a supply device and a bar processing machine.

[Explanation of symbols]

 1: Counter (moving amount detecting means) 2: Storage section (storage means) 3: Comparison section (comparison means) 4: Abnormality detection section (abnormality detection means) 5: Control section

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. In a feed arrow movement amount confirmation device of a bar feeder for confirming the movement amount of a feed arrow of a bar feeder for feeding a bar to a bar processing machine, a movement for detecting the movement amount of the feed arrow. An amount detecting means, a storage means for storing a reference moving amount detected by the moving amount detecting means, and a comparing means for comparing the reference moving amount stored by the storing means with a moving amount detected by a new process. When,
A feed arrow movement amount confirmation device comprising: an abnormality detection unit that outputs a feed abnormality signal when the movement amount newly detected as a result of the comparison by the comparison unit is out of the allowable range.