JPS6085823A - Gear shaper with relieving interference detecting function - Google Patents

Abstract

PURPOSE:To obviate the superfluous wastage of a tool and a machine itself befor it happens, by detecting the presence of relieving interference accurately and speedily, while constituting a gear shaper so as to stop its gear cutting at once, of the gear shaper provided with a relieving interference detecting function. CONSTITUTION:When a relieving interference happens in a cutter 3, this cutter 3 and a work 15 come into contact with each other whereby torque FR in the same direction as feed component force or in the reverse direction is added to the cutter 3 being in its return stroke. In this case, the torque FR by means of the relieving interference is generated in the reverse direction against the cutting resistance. If suchlike torque happens, sampling voltage grows larher than a threshold value. Therefore, a warning indicator lamp is lighted and simultaneously gear cutting is stopped by a control part. With this constitution, the superfluous wastage of a tool and a machine itself can be obviated before it happens.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a gear shaper with an IJ jJ-ping detection function, and a V-shaped gear shaper is provided to stop cutting when relieving is detected.

In a typical gear shaper, a cutter aper is used so that the gear shaper cutter (hereinafter referred to as a cutter) with a thick 6 and a different shape can be used to carry out the cutting process. In other words, as shown in Figure 1, which shows the structure of the cutter attachment part of the gear shaper, there is a canter arbor attached to the cutter head body L.
are fixed and shortened with bolts or the like, and a binion-shaped canter 3 is attached to this atta arbor 2 and fixed with a fastening collar 4 and a nut 5.

Incidentally, gear shaper machining has traditionally been associated with the problem of leakage pink interference, but this problem has not been fully resolved.

The most troublesome factor in gear shaper processing is that during the process of cutting the gate wheel, the cutter comes into contact with the shaved gear surface, leaving scratches on the surface of the gate wheel and causing abnormal wear. This contact during the return process is called lily-pink interference. Conventionally, relieving interference is caused by abnormal wear of the cutter or workpiece, or cutting Fj.
lJ tt tD 14 The operator used to judge whether there was any interference, increase or decrease the offset weight and offset angle of the work table, and find a position where no relieving interference would occur. However, when determining the presence or absence of leakage pink interference based on abnormal wear or abnormal cutting noise, there is a drawback that it is difficult to accurately and quickly determine the number of marks under all types of machines, cutters, cutting conditions, workpieces, and cutting conditions. . Furthermore, there was no attempt to actively detect the presence or absence of a relief worker's dream on the machine.

On the other hand, a method has been put into practical use that allows relieving to be carried out on a desk by adjusting the position of the relieving machine, cutter, cutting conditions, workpiece, and usage. Needles must be applied individually depending on the condition, which has the drawback of requiring a great deal of time and expense.

In view of the above-mentioned drawbacks of the conventional art, the present invention has been developed to accurately and quickly detect the presence or absence of relieving dry sand, and to stop the releaving interference detection system based on this detection.
The purpose is to provide. The structure of the present invention that achieves the desired object is to put the return line of the pinion cutter inside and transfer the fugitive torque generated in the pinion cutter to the needle side * m1
4 means and [Ht#llJ+ stage outputs a total of 1itll]
Generates a signal that emits a threatening signal when the value exceeds the threshold value and t when the value and the smooth tail are exceeded: 1 =
The present invention is characterized by comprising a stage and a control means configured to stop the single-cut operation of the pinion cutter in response to a repelling signal from the cough number 1a generating means.

), while referring to the figure noh #! Ai will explain.

First, the second figure shows the canter arbor used in the embodiment of the present invention. 6 bolts for attaching the cutter arbor, 12 is the crank part, and 13 is the canter arbor.

This canter arbor 53 is equipped with a strain gauge 7 for sensing the cutting torque t-a, and a transmitting means t for giving the output of the strain cage to an external device such as a control section (not shown) of the gear shaper. The arbor itself must have its rigidity reduced as much as possible, but at the same time, the reduction in rigidity due to relieving interference (RIJ)
Since it is necessary to adjust the torque so that it can be detected by the strain gauge 7 as an insect, the canter arbor 13 is partially broken in the wall thickness of the crank part 12.
It has a semi-hollow disk shape with 'E'. This Hirohei Kisen 1
There is a strain gauge 7 on the outer periphery of No.1.

In addition, since the strain gauge 7 needs to increase the cutting torque, it is pasted and coated 6 on the outside of the curved part 11 by a known method. On the other hand, sending out the strain gauge output'f
There are various types of steps such as non-slip feed ridges, slip rings, and connection cords. In this cutter arbor 13, there is no contact m! An ultra-compact FM transmitter 9 is used to transmit the name, and this small-sized FM transmitter 9 is installed together with an ultra-compact battery 8 on the internal flange curve 2a of the canter arbor 13. In addition, a cover lO is provided between the upper and lower cranks of the thin wall portion 11.
1 installation ty1 strain gauge 7, panteri 3. Depends on FM transmission,
Wheatstone bridges, amplifiers, etc. [I'm trying to use the cutoff h1jIII+ and 7i scraps in the cutoff filter. Is #Jkc outside the cover 10 not shown?
” A lead antenna t for M transmission is also attached.

Next, I will explain the overall structure of this embodiment to the third person. As shown in the figure, in order to increase the detection sensitivity of cutting torque,
The strain gauge 7 is assembled into the Wheatstone bridge, and the output voltage of the Wheatstone bridge is amplified by the amplifier 56 and inputted to the sending means 17 such as the FM transmitter, slip ring, and connection cord. The two gap sensors 19 are Lv:,
It's so hot. Then, when the crank arm is centered at the top dead center, the bottom dead center / 1mm is centered from the top dead center No. 16 light generation path 2°, and when the crank arm reaches the bottom dead center, G The bottom dead center object number is sent out from the bottom dead center object number relaxation circuit 21. The sampling point 18 is transmitted by the transmitting means 17. A: Sample the output voltage of the Wheatstone bridge given by A (i) at the bottom dead center and Li (li) at the top dead center.

In the comparator 22, an m-constant threshold tyt VR is set by a threshold 1Ili setter 23. This comparator 2
2 compares the sampling voltage VS with the threshold value vR,
When vs2vR interference occurs, the plaster display lamp 24 is turned on and a warning signal 25 is output to the control section 27. When the control unit 27 receives the warning signal 25, it stops the gear cutting. On the other hand, if vs<VR, a driving continuation command 26 is output, and driving is continued.

Next, the operation will be explained with reference to FIGS. 3 to 71.

In gear shaper processing, as shown in No. 41, principal force FC
Three cutting resistance components, ie, a back force Fb and a feed force Ff, are transmitted to the canter arbor and the cutter head body via the cutter 3t. In FIG. 4, the arrow indicates the cutting direction. Therefore, using the canter arbor 13 shown in Fig. 2, the feeding force (
Cutting torque] Ff is detected as strain, recorded via the sending means 17, and viewed at °C.

Figure 5 shows the recorded results 2 when cutting conditions with no relieving interference were considered based on a desk study using a computer, etc.
show. In FIG. 5, No. 1 represents a signal indicating the top dead center during one stroke of cutting, and (C) represents the signal No. 1d indicating the bottom dead center. Cutting is performed from the top dead center to the bottom dead center, and as shown in the same figure (bJ), it can be seen that no torque change occurs in the process of returning from the bottom dead center to the top dead center.

When a relieving dream occurs in the canter, the cutter and the workpiece come into contact, and as shown in Figure 6, the torque FR in the same direction or the opposite direction as the feeding force is applied to the canter's return stroke K. and joins cutter 3. s<6 In the figure, 14 indicates the contact point, 15 indicates the workpiece, and B indicates the return direction.

Fig. 7 Select cutting conditions where beam reeving interference occurs and record the feed component force km in the same manner as Fig. 5. In this case, it can be seen that in the return stroke of the canter, torque FR is generated due to relieving interference in the direction opposite to the cutting resistance.

When such a torque FR is generated, the third prisoner is shown tw
At m, the sampling tortoise pressure Vs becomes larger than the threshold value vR. Therefore, the warning fitting indicator lamp 24 is turned on, and the double cutting is stopped by control s27.

As specifically explained above in conjunction with the embodiments, according to the present invention, one cut is stopped when relieving occurs, so unnecessary wear and tear on tools and machines can be prevented.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a conventional canter arbor for a gear shaper, FIG. 2 is a simplified view showing a canter arbor used in an embodiment of the present invention, FIG. 3 is a block diagram showing the overall configuration of an embodiment of the present invention, and FIG. The figure is an explanatory diagram showing the three cutting components of force in gear shaper machining, the fifth factor is a waveform layer that shows the change in the nine-component force when there is no beam reeving, and Figure 6 is an explanatory diagram of torque generation due to beam reeving interference. The seventh layer is a waveform layer that shows the change in the feeding force when there is relieving interference. In the drawing, l is the canter head body, 3 is the cutter, 7 is the strain gauge, 9 is the ultra-small FM transmitter, 13 is the canter arbor, 17 is the transmission means, 58 is the sampling circuit, 19 is the gap sensor, 20 is the top 21 is a bottom dead center signal generation circuit; 22 is a head comparator; 23 is a threshold foot device; 25 is a hoof signal; and 27 is a control section. ! Patent attorney Mitsubishi Asia Industries Co., Ltd. Patent attorney Shibu Hikari (5 others)

Claims (1)

[Claims] During the return stroke of the pinion cutter, the torsional torque t generated in the pinion cutter is compared with the measured value output by the holding means and the predetermined threshold t. A signal generation means for generating an inter-pipe signal when the threshold is exceeded, and a control means configured to stop the cutting operation by the T pinion cutter in response to the warning signal of the signal generation + stage. Features: A gear shaper with a riving interference detection function.