DE7120473U - Device for short-term measurements for special use on machine tools and similar devices - Google Patents

Description

Grawor sales

for electrical, mechanical

and acoustic devices GmbH.

1 Berlin 30

Lützowstrasse 68

Device for short-term measurements for special use on machine tools and similar equipment

The device for short-term heating for special use on machine tools and similar equipment should be suitable, detect short times in the range of 1/100 of a second and longer. It is supposed to be through a correspondingly compact and stable Construction on the one hand and, through appropriate external design, on the other hand, mobile use should also be possible in rough working conditions.

There are devices known for special use on machine tools, manufacturing machines and similar devices are developed and enable length measurements there by means of electronic, electrical and electromechanical devices. These devices are very often found on cutting machines Machine tools. A digital display shows a length dimension that is of interest in the respective work process. These devices is often a particularly robust and compact structure. Furthermore, the devices are designed in such a way that external interference due to electrical, magnetic and similar interference fields, as they occur in industrial operations, as little impact as possible have on the measurement results. This distinguishes these devices from other known devices with similar functions, which are used in laboratories and in less harsh work environments.

In many machine tools, automatic production machines and similar devices, spindles are present that have a known number of revolutions per unit of time. This eliminates the need for a

• · Λ t · · · · · t till

development of the function time by a measuring device at these points. If, however, movements are caused by other mechanical, pneumatic,

it happens that the time of this movement is difficult or can no longer be deduced from a known speed on the machine. There are timing devices known that such movements can ascend precisely in terms of the time required for this, however, a large part of these devices is either not suitable for use in rough operation or it is a complicated process that needs a special adaptation to the task at hand and z. T. also allow the measurement result to be recognized only after a certain period of time. This applies e.g. B. in all photographic processes. According to the invention, the device for short-term measurements for special use on machine tools and similar devices is intended to but also an operator handle or a human body part in connection with the machine operation, z. B. the Hand or foot, by determining the time between the beginning and the end of the movement. There is a compact and stable construction of the device on the one hand with a circuit suitable for all of the aforementioned purposes on the other hand tied together. The connections of the device are pluggable in order to enable a quick change of the place of use. The device also contains the supply voltage source for non-contact switches.

The invention is illustrated in the following example:

A mechanical counter (2) is built into a stable housing (1). The housing also contains signal lamps (3) that show the current working status of the electrical and electronic dimensional circuit. Plug devices are arranged for connecting the probes and the mains voltage; for the scanning of the beginning and end of the measuring section Plug-in devices (4) and (5), the plug-in device (6) for a standby button. Will be one or more of these connectors

712047325.11.71

• * 4 # t

• ·

• · «t

not required, short-circuit plugs (8) are used. As a result, the arrangement of changeover switches for adaptation to the measuring task, which often leads to interference in rough operation, is no longer necessary. The device has a power supply that is sufficiently dimensioned that a large number of commercially available types of non-contact switches are used as probes in addition to the built-in circuit can be powered. The probe heads are fed via free contacts on the plug-in connection (4) and (5). For the actual counting task A pulsating direct current of 100 Hz is generated in the power supply (9). This is via an electronic gate (10) fed to the counter. A control voltage (11) also generated in the power supply is fed through a maximum of 3 ports (12), (13) and (14) the gate (10) and controls the pulsating direct current of the power supply of 100 Hz Counting process triggered. The counter display shows digital units of 1/100 of a second. The counter can be reset to "0" after the counting process has ended. The effect of the 3rd gate, the triggered by a button is a preparation circuit. This allows a multitude of possible applications to be combined. If the time is to be found out that is required by a person to let go of an operating element on a machine in order to then immediately reach into a work space, so a fast-acting light barrier is used as a contactless button at the border of the work area. The line voltage is connected to the connector (7). The connection is made at (4). A shorting plug is used in (5). The control element is like this with the standby button connected that it triggers the "prepare" circuit when it is actuated. The operator leaves the control element go, the counting process is triggered until the light barrier as a non-contact button (4) is interrupted and the counting process is ended. The counting process starts after releasing the Photocell does not turn on again because the preparation button is not pressed now. Thus, the counter shows the "access" needed time. Since now there are also two non-contact switches for

712047325.ii.7i

start and end of the test track can be used, quite different combinations can be made and thus solve a =

7120473S5.11.71

Claims (3)

based on notification from the German Patent Office v. June 35, 1971 Claims for protection 1. Device for short-term measurements for special use on machine tools and similar devices in which all electrical electronic and electromechanical components together with a mains connection part, an electronic unit for the generation of mains-synchronous pulses in a sequence of 100 Hz and an additional power supply for non-contact switches used for timing start and timing stop can be in a stable and compact housing (1) are housed, characterized in that the time measurement by an electromechanical counter built into the housing (2) takes place with the "zero" position, which is the network-synchronous pulses of 100 Hz via an electronic gate (10) of the electronic circuit built into the housing gets controllably supplied. 2. Device for short-term measurements for special use on machine tools and similar devices according to claim 1, additionally characterized that in the housing (1) still further electrical Gates (12 and 13) as well as a preparation circuit in addition are accommodated in order to adapt the device to the measuring task in a structure that allows the optional activation of this additional Facilities. 3. Device for short-term measurements for special use on machine tools and similar devices according to claim 1 or 2, additionally characterized in that the housing (1) has no operating elements on the outside such as buttons, rotary switches and other hand-operated switches, but that the switch is only made by the Selection of the plug connections (4), (5) and (6) attached to the housing (1) for the connection of the measuring command transmitter or by short-circuit plugs (8) is achieved. 712047325.11.71