DE1071526B - - Google Patents

Description

GERMAN

With automatic tool grinding machines with hydraulically controlled table movement and hydraulically or electrically controlled dividing process, the table movement must be stopped during the dividing process is performed. The dividing process must also be carried out properly before the table starts to move starts again because otherwise the workpiece to be ground will hit the grinding wheel and both parts become unusable or destroyed. Because the dividing process is only ever on one side of the table reversal occurs, the reversing of the work table was prevented on known machines for so long until the partial process was carried out. This requires a lot of controls and careful work Execution of the control spool, because the pressure medium is in the event of the slightest leak in the control spool slowly creeps through these leaks and thereby the control spool do not move correctly, so that the table movement is released too early or incorrect divisions develop.

According to the invention, these known shortcomings are prevented by the fact that the dividing process before Table reversal can be pre-controlled by a slide and can be initiated with the table reversal, with a Locking slide blocks both cylinder sides of the table piston gear and at the same time a partial magnet, which lifts the partial tooth out of the partial disk and switches on a motor that causes the partial movement. Included there is still the advantage that the working hydraulics consists of only three control elements, the Main slide, the reversing slide and the locking slide, the greatest possible due to their simplicity Ensure operational safety.

The electrical sub-process is characterized according to the further feature of the invention in that the The partial magnet tensions a clutch spring at the same time as the partial tooth is lifted out of the partial disk, which couples the sub-motor gearbox with the sub-spindle drive. The partial magnet is in its front position de-energized after the partial tooth has been excavated, and the partial tooth sits on top of it under spring pressure rotating index disk on the outside diameter. As soon as the next partial gap appears, the partial tooth jumps in and releases the clutch to the partial motor transmission, the partial tooth lever in its starting position Contact actuated, which rotates the main slide via a locking magnet, causing the locking slide is reversed, the table movement is released and at the same time the power supply to the partial device interrupts.

The inevitable cooperation of work table and partial movement and vice versa is thereby included guaranteed by the simplest means. In particular

Automatic tool grinding machine

Applicant:
JE Reinecker Maschinenbau GmbH,
Singing in over Ulm / Danube

Claimed priority: Exhibition at the opened on September 15, 1957 5th European Machine Tool Exhibition 1957 in Hannover

Rudolf Westenberger, Einsingen over Ulm / Danube,
has been named as the inventor

a very fast dividing process is achieved by the electrical organs of the dividing device.

The operation of the machine can also be designed so that when the work table is moved the hydraulic part of the machine is short-circuited or depressurized in a known manner by means of the handwheel with the main lever, the automatic electrical division and the locking magnet are switched off and a manually operated switch is used for this initiates electrical sub-process.

An exemplary embodiment of the invention is shown in the drawing. It shows

Fig. 1 is a front view of the grinding machine,

Fig. 2 and 3 the control elements in different positions,

Fig. 4 and 5 the arrangement of the control elements seen in cross section.

The workpiece 3 clamped between the center points of the partial device 1 and the tailstock 2 is connected to the partial spindle 5 by a pin 4 and is arranged on the reciprocating work table 6 , which is guided on the bed 7.

When the work table 6 runs in its partial position, the workpiece 3 leaves the grinding wheel 8, the stop 9 actuates the main lever 10 by driving it on the pin 11 and rotates the main slide 12 from position A (Fig. 2) to position B (Fig. 3) . It thus connects the groove 18 with the channel 13-14 and the groove 19 with the channel 15-16. The main slide 12 is thus pilot- controlled. Once the worktable is rotated to the stop 27 of the reversing lever 28 at pin 29, which in a known Tischumsteuerung W ^r else is performed (not shown). The reversing spool 23 rotates from position C (Fig. 2).

909 689/72

Claims (3)

to position D (Fig. 3). Hydraulic fluid flows from line 30 into channel 20 via 31 to 22-25-26-2435-13-18-14-36 to annular space 37 and moves the gate valve 38, which blocks the two cylinder lines 39-40 of the table piston gear 41-42 and the table movement is locked. The pressure medium displaced from the annular space 43 flows back into the storage container via 44-16-19-15. In the end position of the locking slide 38, the contact 46 was actuated and the partial magnet 51 and the partial motor 52 switched on (Fig. 4, 5). The sub-motor 52 drives the coupling sleeve 62 via worm 60, worm wheel 61. The lever 53 is rotated by the partial magnet 51, shifts the sleeve 54, in the annular groove 55 of which the lever 56 engages, and lifts the partial tooth 57 out of the partial disk 58 with its end 56 a, against the pressure of the spring 59 shifted by lever arm 53 o the pressure pin 64 and tensioned the spring 65 so that the cone coupling 66 is pressed into the coupling sleeve 62. Since the motor gearbox 52-60-61 is already running, the gear wheels 67-68-69 and the sub-spindle 5 with the index disk 58 are rotated via the cone clutch 62-66. As soon as the magnet 51 has arrived in its pulled position 51 a, the adjusting screw 71 actuates the contact 72, whereby the magnet 51 is de-energized. The partial tooth 57 is placed under the pressure of the spring 59 on the outer diameter of the partial disk 58, which has meanwhile rotated by a small amount. Since the lever 56 engages in a groove of the partial tooth 57, the compression spring 65 increases the partial tooth pressure on the partial disk. If the next partial gap has rotated up to the partial tooth 57, this jumps into the gap under the pressure of the spring 59, the lever 56 pushes the sleeve 57 back, and the lever 53 goes into its initial position. The screw 73 actuates the contact 74 and closes the circuit to the blocking magnet 75, which moves the main slide 12 from position B (Fig. 3) to position A (Fig. 2) via the pull rod 76. The pressure medium now flows from the line 30 via 20-17-19-16-44 to the annular space 43 of the locking slide 38 and pushes it into the position shown (Fig. 2). The pressure medium displaced from the annular space 37 flows back from the channel 36 via 1418-15-45 into the storage container. As a result, the two cylinder lines 39-40 are released, and the table piston gear 41-42 pushes the work table to the right, since the lines 39-40 have already reversed their printing direction as a result of the table reversal that took place previously. The grinding wheel 8 now grinds the set groove in the workpiece 3 until the left table stop 48 rotates the reversing lever 28 and the work table is reversed in a known manner and moves back into its left partial position. Patent claims: 1. Automatic tool grinding machine, with hydraulically controlled table movement and electrically controlled circular partial movement for the workpiece spindle, characterized in that the sub-process can be pre-controlled by a slide (12) before the table reversal and can be initiated with the table reversal (28) , with a locking slide (38 ) Shuts off both cylinder sides (39, 40) of the table piston gear and at the same time switches on a partial magnet (51) which lifts the partial tooth (57) out of the partial disk (58) and a motor (52) causing the partial movement. 2. Machine tool according to claim 1, characterized in that the partial magnet (51) simultaneously with the lifting of the partial tooth (57) from the partial disk (58 ) tensions a clutch spring (65) which the partial motor transmission (60, 61, 62) with the Partial spindle drive (66, 67, 68, 69) couples. 3. Machine tool according to claims 1 and 2, characterized in that the partial tooth (57) when jumping into the next gap in the partial disk (58) releases the clutch (62 to 66) to the partial motor transmission, the partial tooth lever (53) in its starting position A magnet (75) switches via a contact (73 to 74) , which releases the table movement and interrupts the power supply line (46) to the dividing device. 1 sheet of drawings © 909 689/72 12.