DE1552801A1 - Automatic control device for gear grinding machines - Google Patents

Description

GEARFABRIK PRIEDRICHSHAPEiT Aktiengesellschaft Priedrichshafen

Automatic control device for gear grinding machines.

The invention relates to an automatic control device for gear grinding machines with an in the direction of the workpiece can be delivered to the grinding wheel and with one on the Dressing tool set to final size =

When grinding gears, splined shafts and similar workpieces, the grinding wheel must be around the. respectively desired infeed amount can be set against the workpiece

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the intended amount to be abraded on the wheel ο After dressing, the grinding wheel must be put back on the previously held grinding position are withdrawn, minus the newly selected delivery amount.

These movements were previously made by step-like "templates controlled, whereby the size of the individual infeeds and the number of desired dressing processes are not changed arbitrarily but made the production of a new template necessary »The approach to the best work process was very close awkward ,, This led to the development of machines with electrical displacement measurement, in which the program sequence can be preselected a connector plate is determined. The proportion of these elec-

BATH ORIGINAL 909334/0780

tric controls is very much in relation to the rest of the machine high. _ -

The invention "relates to a feed and dressing control, which can be preselected in all variations and replaces the expensive electrical arithmetic units with simple mechanical control elements.

; The invention consists in that for the optional movement ί of the grinding spindle carrier (3) in the respective grinding allowance

corresponding grinding position and in the position for dressing L | a common automatic control device (3,6) with mechanical Distance measurement (9 »10) is available.

A preferred embodiment of the invention includes one between a fixed (21) and one by a feed motor (11) movable stop (9) movable servomotor (7> 8) and a with the movable stop synchronously running program switching element (13) with exchangeable actuating elements (14), soft with Limit switches (15) interact.

An embodiment of the invention is described below and W shown in the drawing.

Figure 1 is a schematic representation of the control device, Figure 2 is a section along the line A-A in Figure 1.

Part 1 shows the grinding spindle slide, which is guided up or down on the grinding spindle support 2. A feed wedge 6 is mounted on this in a horizontally displaceable manner. A holding plate 3 is mounted on the infeed wedge by means of rollers and can be moved vertically up or down by moving the infeed wedge. The grinding spindle slide is connected to the holding plate by means of the

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BATH ORIGINAL · · / · ·

Spindle 4 and the spindle nut 5 are connected. The displacement of the Zustellkeiles done through the built-in in the hydraulic cylinder 7 piston 8. The piston is slidably but non-rotatably mounted, the adjusting nut 9 and limits the displacement path of the Zustellkeiles to the left when the fixed to the piston plate 20 to - * the nut 9 abutting . The adjusting spindle 10 for the adjusting nut is driven by the feed motor 11. In the extension of the adjusting spindle, the worm drive 12 is connected, which drives the program disc 13. Depending on the selected workflow, command plugs 14a to Hc of different lengths are inserted into the holes in the program disk, which then press the various limit switches 15a to 15c on the limit switch bank during the workflow and thus initiate the selected operations. The stop 14d for the finished dimension is fixed in the program disc. It cooperates with the limit switch 15d.

The amount to be abraded on the grinding wheel during dressing is fed in via the bevel drive 16 from the upper motor 17. the The size of the amount to be scraped off is regulated by a timer. When switching the machine to another Yierkstückdruckmesser or when changing the grinding wheel, you can use the handwheel 18 adjusted after loosening the coupling 19 of the grinding spindle slide will.

The described control works as follows:

In the program disc with a perforated scale, the dimension the longest command plug 14c inserted after the greatest expected grinding allowance. The shortest command plug 14a are then accordingly the preselected number and at the distance of the desired size of the individual infeeds. Is on an or

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BATH ORIGINAL

a dressing of the grinding wheel is provided for several of these points, a slightly longer plug 14b is inserted.

Before the start of a work cycle, the feed motor 11 has over the worm drive and the program disc turned clockwise for this time until the longest command plug 14c opens the limit switch 15c the limit switch bank presses. The adjusting nut 9 was moved to the left by the adjusting spiral 10. The one on the right Piston under pressure on the cylinder side follows the nut and pushes the infeed wedge to the left. This causes a lifting the holding plate 3 with the grinding spindle slide 1. The Machine is now set in G-ang and the grinding of the work piece begins. According to an '' adjustable on a counter; - · ' number of table strokes, the feed motor is switched on by a command from the counter and turns the program disc to the left until the next command plug Ha pushes a limit switch. In this case, the piston 8 is with the adjusting spindle 10 and nut 9 Infeed wedge 6 is pulled to the right and the holding plate 3 is lowered with the grinding carriage by the selected infeed amount. Respectively

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after reaching the number of teeth set on the counter repeatedly ->. (

this process.

If a somewhat longer plug 14b hits the limit switch 15b, this means that the grinding wheel is to be dressed. The piston is now acted upon from the left side and moves with the _{infeed wedge to the right to the IF e} stanschiag on the right cylinder cover 21. The holding plate with the grinding spindle slide is lowered to the finished dimension. The motor 17 supplies the amount to be dressed and the wheel can be dressed.

After the dressing process, the piston is placed on a dressing device

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given command again from the right "acted upon and the The grinding spindle slide resumes the position it was in before the dressing, reduced by the infeed amount the adjusting nut has initiated in the meantime.

As soon as the grinding wheel is in its position for the pertigma reached, the contact disc has reached the end position. The stop 14d switches via the limit switch 15d Infeed motor 11, selects the shutdown of the machine and the switching of the infeed motor. After taking the last one The table slide is stopped and the grinding spindle slide 1 and the program disc are switched off automatically reset to the selected largest grinding allowance on the contact plug Hc.

Instead of a contact disc with different lengths axially standing plugs can also be a wider disc with several rows of the same length, arranged radially in different planes Plugs be provided.

20.2.1.969

^ File: 4771

909834/0780

Claims (1)

Patent claims 1) Automatic control device for gear grinding machines with a table slide moved back and forth, one on the machine frame at right angles to the movement of the table slide movably guided grinding spindle carrier and one depending on the rotation of the workpiece to be ground controllable feed device for the movement of the grinding spindle carrier,! characterized in that for the optional Movement of the grinding spindle carrier into that of the respective grinding allowance corresponding grinding position and in the position for a common automatic control device (6, 8) with mechanical displacement measurement (9 »10) is available for dressing. 2) Automatic control device, characterized in that that between a fixed (21) and a stop (9) which can be displaced by a feed motor (11), a servomotor can be moved (7, 8) and a program switching element (13) which runs synchronously with the displaceable stop and has exchangeable actuating elements (H) are present, which interact with limit switches (15). 3) Control device according to claim 1 and 2, characterized in that the servomotor has a double pressurized hydraulic piston (8) which moves the holding plate (3) of the grinding spindle carrier via an infeed wedge (6). 4) Control device according to claim 1, characterized in that that a grinding wheel spindle (0) accommodating 90 9834/0780 SAD ORiGiNAL spindle slide (1) is available, which is additionally adjustable on a holding plate by a breaking motor (M) _{mounted on the holding plate c} 5) Control device according to claim 1 to 4-, characterized in that the displaceable stop of the servomotor (7,6) consists of a nut ( and a shaft supported by the iLäö'.hjnenfest feed motor 9) (11) rotatable screw spindle (10), in such a way that the hydraulic piston (8) both by turning the screw _f by the infeed as sw also by mutual hydraulic loading: sohen the nut as adjustable and another fixed stop (21) can be moved., 6) Control device according to claim 1 to 5 _y characterized in that the program switching element (13) and the adjustment stop (9) are driven by the same motor (11) » 7) Control device according to claim 1 to 6, characterized in that that the program switching element (13) is designed as a rotatable perforated disk with exchangeable, axially arranged actuating pins (H) of different lengths, which with Limit switches (15) work together, and if desired, the preselecting of the largest grinding allowance of several infeed operations different strengths and one or more dressing operations = 12/12/1966 "909834/0780 File 4771 A / cl. . L e r s e i t e