Duro-t – ROHM SUPER-LOCK User Manual

Page 13

3.1.1.3 Locking unit

First of all, the guide sleeve of the locking unit is inserted

in the spindle. Attention should be paid to the careful in-

sertion of the O-ring on the guide sleeve into the spindle

drill hole in order to avoid the shearing of the O-ring.

The module with clamping sleeve, collet and draw bar

is screwed into the spindle from the front. The movable,

protuding collet in the clamping sleeve is initially positi-

oned over the pull bolt without any screwing movement.

The collet is then manually placed on the head of the

draw bolt, the clamping sleeve is repositioned on the

collet as far as it will go on the rotation prevention screw

and is then pushed axial onto the draw bolt (compare

illustration 6) with some pressure. Depending upon

the HSK nominal size, this process is undertaken with

some application of force due to the spread of the collet.

Standard tools can be used as aids.

3.1.1.4 HSK clamping set

Once the clamping sleeve has been successfully

mounted, the HSK clamping set can be installed. The

assembly and setting regulations for HSK clamping sets

must also be observed.

In order to determine the necessary position of the

pressure head in the release position, the calibrating

disc included in the delivery must be cut to the neces-

sary size. In order to do this, the pressure head with

a calibrating disc is screwed to the drae bar and the

resulting is measured.

The thickness of the calibrating disc is then reduced

by the difference between the existing amount and the

stipulated amount. The pressure head underlaid with

the adapted calibrating disc is countered on the draw

bar (compare the setting measurement in the assembly

drawings).

Warning: the tolerance range for the setting

measurement may not be exceeded! During

start-up operations, proceed with particular care

in order not to damage the threaded pins of the

rotation prevention on the collet. The position of

the draw bolt described in point 3.1.1.2 must also

be observed.

Once the HSK clamping set is mounted, the full system

with the locking unit and clamping and release unit is

now ready for use.

3.1.2 Mounting aids

The locking unit can be installed with standard mounting

tools. Special keys are only required for mounting the

clamping sleeve. Standard torque keys can be used

on the special keys (refer to table 3 for Röhm ID no) to

apply the right torque level.

3.2 Initialisation

The functions of the locking unit can be checked by

operating the clamping and release unit when the

spindle is stationary. The “tool released“, “tool clam-

ped” and “clamped without tool” positions are determi-

ned (refer to table 1 for values). An HSK testing tool with

“0 position” on the HSK clamping shoulder is used to

determine the exact clamping position.

In order to determine the positions of the various opera-

ting positions, the relevant sensors must be tuned to the

clamp strokes and signal ranges in the machine control

must be recorded.

3.2.1 “Tool released” position

This position is checked when mounting the full system

(refer to 3.1).

3.2.2 „Tool clamped“ position

Due to the tolerances of the HSK tools, the tolerances

of further elements in the force flow and the flat angle in

the locking unit results in a relatively wide clamping ran-

ge around the ideal clamping point (nominal clamping

stroke on the draw bolt). Table 1 contains these values for

all HSK sizes (stroke range on the draw bolt: e.g. 16-4

mm for HSK63).

Analogue sensors are generally used to establish the

stroke range. The sensor must be coupled with the ma-

chine controls in such a way that the necessary “clamping

window” for the “clamping tool” function is identified and so

that the spindle shuts down if changes to the axial clam-

ping position take place during rotation.

3.2.3 „Clamping without tool“ position

The maximum value of the clamping position can be

exceeded as long as it is ensured that the clearance to the

“clamping without tool” position does not lead to malfunc-

tions. Depending upon the nominal size, it is recommen-

ded that a minimum clearance of 1- mm is maintained

between “clamping” and “clamping without tool”. This also

applies to special applications. Table 1 contains the maxi-

mum values of strokes for clamping without a tool.

3.2.4 Sensor technology for determining the position

In order to establish the positions described above, sui-

table sensor technology which is linked with the machine

controls must be used. If these modules, as a part of the

clamping and release units, are not purchased from Röhm,

the monitoring functions described above must be imple-

mented in a sufficient manner.

The monitoring of the clamping position of the

locking unit during processing is necessary from

a safety point of view. If the operator of the locking

unit does not monitor the clamping position, Röhm

expressly refuses any liability for possible da-

mages caused by malfunction of the locking unit.

Montage- und Betriebsanleitung für

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