JPS6263048A - Electrode working machine - Google Patents

Abstract

PURPOSE:To make effectively a product of a blank and improve productivity in a steel making electrode working machine by actually automatically measuring the length of a work to judge whether or not the work is accepted and work the accepted work with an optimum feed-in for the actual measured length. CONSTITUTION:One of a pair of measuring arms 16, 16' moves from each predetermined position until it abuts against end faces 14, 14' of an electrode work 1. The relative movement quantity is automatically measured by a rotary encoder 8, and whether or not the work is accepted is automatically judged through a high speed counter 9 by a program controller sequencer (PLC) 10 so that the signal for sending out rejected works is generated. And the accepted work is worked with an optimum feed-in for the acually measured length according to the working signal and the number of measuring pulses generated simultaneously. Also, when NC apparatus 11, 11' can be connected to a manual input type data corrector such as digital switch, previous input data are added to the table movement data of PLC 10 for reworking.

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to the improvement of an electrode rod processing machine that completely processes electrode rods used in steel manufacturing, etc., and in particular automatically measures the length of the electrode rod workpiece and optimizes it. It concerns an electrode rod processing machine that can process with a certain depth of cut.

(Prior Art) A conventional electrode rod processing machine is, for example, as shown in FIG. The workpiece (1) is moved to the position shown and supported on a support stand (not shown) of the electrode rod processing machine, and the chuck device (22°) is moved in the direction of the arrow (4, 4').

The chuck device (2, 2") has a fixed length lever (1) supported by a cylinder (7, 7°) to move correspondingly
3, 13') is moved together with the chuck device (2, 2') until it hits the end face (14, 141) of the workpiece (1), and when it hits, it is detected by the limit switch (6, 6'), The chuck device (2, 2) is designed to clamp the workpiece (1) so that it can rotate fully. Therefore, with such conventional products, it is not possible to actually measure the length of the workpiece, and the depth of cut of the workpiece is measured from the end face of the workpiece. Since machining was performed by determining the depth of cut, it was not possible to actually measure the length of the workpiece and finish it to a fixed length, and when changing the depth of cut, the operator had to make manual arrangements. All operations were required.The workpiece (1) was clamped n*, and the cylinder (7,7")
moves the fixed length lever (13,13) backward, and the table (3,3") to which the machining unit (15,15°) is fixed is reciprocated in the direction of the arrow (5,5"), and the workpiece (1) is moved back. After both end faces are processed, the workpiece is sent to a single position by a device not shown.

(Problems to be Solved by the Invention) An object of the present invention is to automatically measure the actual length of the workpiece, and to automatically measure the length of the workpiece, and to detect rejected workpieces (too long or too short) that cannot be applied to the processing section of the electrode rod processing machine. In addition, for acceptable workpieces, the optimum depth of cut for the measured length can be found and machined without requiring manual setup operations by the operator. It is to make it.

(Means for Solving the Problems) For this reason, the present invention provides a pair of measuring arms that are movable parallel to the axis of the workpiece from fixed positions adjacent to both ends of the electrode workpiece until they simultaneously abut the ends of the workpiece. a rotary encoder that detects the relative movement of the pair of measuring arms, a high-speed counter that counts the output signal of the rotary encoder, and a pass/fail determination of the workpiece based on the number of measurement pulses from the high-speed counter. A PLC, that is, a program controller sequencer, which outputs the corresponding machining/feeding signals, and an NC device, which inputs the machining signals of the PLC and the number of measurement pulses that are simultaneously output, determines and outputs the optimum table movement amount. Electrode rod processing machine characterized by including (effects) With this configuration, one of the pair of measuring arms moves from each fixed position until it abuts both ends of the workpiece, and the relative movement amount is automatically measured by a rotary encoder. The PLC via a high-speed counter automatically determines whether the work is acceptable or not, and a signal to send out a rejected product can be output.

Then, for accepted workpieces, the optimum depth of cut i for the actually measured length is determined and machined using the machining signal and the number of measurement pulses output simultaneously, without requiring manual setup operations by the operator. Now you can.

In addition, if the NC device can be connected to a manually input data correction device such as a well-known digital switch, optimal rework can be achieved by setting the depth of cut of any data in advance for a workpiece that requires rework. Now you can.

(Example) Next, an example of the present invention will be described with reference to the drawings.
A pair of measuring arms (16, 16°) shown in Fig. 1 are arranged adjacent to the workpiece (1) position shown in Fig. 3, and are positioned to position the longitudinal center of the workpiece (1). It also serves as a device, and both end surfaces (17, 17') of the workpiece (1) are
) towards the measuring arm (16
, 16') hits the workpiece end surface (17, 17°), the measuring arm pushes the workpiece (1) and
) is moved until the other end surface of the measuring arm (16, 16') comes into contact with the other end of the measuring arm (16, 16').
Both end faces (17, 17) of workpiece (1)
When the workpiece (1) hits K, the workpiece (1) is positioned at the center in the longitudinal direction. ), that is, in the case shown, the same stroke (S) (S) is detected from each fixed position, and the two-phase pulse corresponding to the stroke is input to a high-speed counter (9). is input to PLCQ, 0 as the total number of phase difference measurement pulses.PLCαa
The number of pulses to be measured is determined by the size of the preset value to determine whether the work can be accepted into the machining section or the work that is rejected, i.e., the work that is too long or too short.The send-out signal is output for the work that has been completed and is rejected. On the other hand, for acceptable workpieces, the machining signal and the number of measurement pulses are input to the left and right No. devices (11, 11') to determine the optimum table movement ftt-, and the left and right The signal is inputted to the table driving DC motor (12, 12'). Each Dc motor (L2゜12") is a processing unit shown in Fig. 3) (xs, xs') Processing is carried out.In other words, workpieces that can be processed to the standard finishing length are finished to the standard finishing length, and materials that are short of the standard finishing length are finished with the minimum depth of cut. , No. device (11, 11) can be connected to a manual input type data correction device such as a digital switch, the data input manually in advance will be added to the optimum table movement amount data of the previous pLc. Therefore, it is possible to carry out machining (rework such as rework) that is deeper than the actual measurement value.

The flowchart of the signals from the rotary encoder (8) is shown in FIG. In the case of FIG. 1, the length of the workpiece (1) as a material can be determined from the following equation.

Hakkakemeyu. -, (S) = Width determining maximum stroke (A
T-Workpiece Long Jaw Blade Note that the number of measurement pulses is determined by the width determining stroke, P, C, D of the gears (21°, 21', 22) and the resolution of the rotary encoder (8). For example, if the gears are p, c, and D1140, and the resolution of the rotary encoder is t4o96 pulses, then stroke 1 u=9.3128378 pulses.

As explained above, according to the present invention, it is possible to automatically determine the acceptability of the length of the material workpiece, minimize the loss of the workpiece, and make it possible to most effectively turn the material into a product. This makes it possible to cut to an arbitrary value, and it is possible to improve work efficiency and productivity without requiring manual setup by the operator.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory block diagram showing the main parts of an electrode processing machine according to an embodiment of the present invention, Fig. 2 is a flowchart showing the operation of the device shown in Fig. 1, and Fig. 3 is a diagram of a conventional electrode processing machine. FIG. 1... Electrode work 3.3°... Table 8.
・Rotary encoder 9 ・High speed counter 10 ・
...P L C11,11' ...NC device 14.1
41...End face 16.16'...Measuring arm 201...Electrode rod processing machine representative Patent attorney Jun Kawauchi 2'! JA3 diagram

Claims (1)

[Claims] a pair of measurement arms movable parallel to the axis of the workpiece from fixed positions adjacent to both ends of the electrode rod workpiece until they simultaneously contact both ends thereof; and a rotary encoder for detecting relative movement of the pair of measurement arms. , a high-speed counter that counts the output signal of the rotary encoder, a PLC that receives the number of measurement pulses from the high-speed counter, determines pass/fail of the workpiece, and outputs a corresponding processing/feeding signal; An electrode rod processing machine comprising: an NC device that inputs the processing signal and the number of measurement pulses that are simultaneously output, determines and outputs the optimum table movement amount.