DE2033250C - Device for correcting the tool position on two-spindle, numerically controlled machine tools, in particular lathes - Google Patents

Description

can be seen, with the cross slide and the sliding The numerical control of the machine tool

mobile tool slides each driven by motors 45 includes a device for zero point shifting, are adjustable, which form parts of position control loops, d. H. for setting the tools 3, 5 to one each to which correction setpoints can be supplied. certain, with the help of the face or tool slot

So far, at a z. B. by tool abrasion at least 1, 4 reachable point from which the machining or thermal expansion necessary processing programs of both tools 3, 5 run Correction of the position of the tool cutting edge of the 50 can. This facility consists of the decade festival Tool carrier switches 8, 9 arranged on the cross slide, on which the amount of displacement ger can be entered via a decade switch of the numerical for tools 3, 5, Di control correct digital-to-analog converters 10, 11, which correspond to the placed. This also changed the position of the entered data analog voltages Hefern, and 55 comparators 12, 13, which are displaceable on the cross slide and carry the analog voltages with Carriage, so that in this case a correction is also made to the measurement results from encoders 14, 15 in Beziedann was required when bringing his position before hung. Deviations between the entered Zero point shift of the cross slide was correct. Target position and measured actual position are Was it not correct, but gave way to the plus via control amplifier 16, 17 with the help of motors 6, or minus side, the size of the direction 60 7 had to be balanced. With this facility, it plays itself necessary adjustment taking into account understandably does not matter whether the input of the data the digit made by the zero point shift with the help of decade switches or others Changes in the planing slide are calculated digitally.

the. In addition, parallel to the digital ana-

The invention is therefore based on the task of the log converter 11 of the decade switch 9 a digital reason, a device connected to the aforementioned analog converter 18, the voltage of which is in To train genus so that the correction of the digit reference to that of the digital-to-analog converter 10 at management of the two tools is simplified and in the same direction of movement of plan and work

tool slide 1, 4 has a different sign. The Analog-WandJer 11, comparator IJ measuring transducer 15,

Voltage of the two digital-to-analog Waudler 10, 18 amplifier 17 and motor 6 occur m funiaion.

run together in the adder 19, pie resulting in the FaU of the early point shift of the ™ nscnm-

The voltage is compared with that of the transducer 14. The digital-analog wanaier also generates at least 1

Each deviation also leads to the displacement 5 18 an analog voltage, which in the comparator and aer

of the tool slide 4 in a position in which the voltage of the transducer 14 is opposite. Because

in the comparator 12 incoming voltages equal to the other sign is a shift of the

are. * ^B tool slide 4 in the opposite direction

This results in the following possibilities: Each for the movement of the cross slide 1, the result is thus Tool 3, 5 can at its decade io is reached that the on the slide 1 is switched on 8, 9 are distributed. If for example brought tool slide 4 also then its bolJ-das Tool of the tool slide 4 is not moved by a position if the cross slide 1 is traversed is away from the zero point, the will be de- set.

kadenschalter8 taking into account the sign In addition to the exemplary embodiment described cup set to the value 1. The digital analog 15 basically also has the option of using the logout converter 10 supplies a movement of the tool slide 4 to mechende that corresponds to the value 1 Voltage. To be reached without simultaneous actuation of the mechanical path. For example, can second decade switch 9, so without changing a nut attached to the tool slide who-tension in adder 19, which is possible per se, into which a threaded spindle engages. This is is the difference between the voltage of the ao optionally to a stepper motor to the independent Encoder 14 and the digital-to-analog converter adjustment of the tool slide 4 or to the 10 the amount of displacement. The measuring transducer 14 can be coupled to the drive of the cross slide, with its allows this process to be checked. Movement in the latter case in opposing

The same applies to the transfer of the zero point shifted direction to the tool slide 4

exercise of the cross slide 1; Decade switch 9, digital »5 will.

1 sheet of drawings

Claims (3)

errors made by the operator when setting the tools can be avoided. Claims. treatment ^ AuffeabeBwi | d according to the requirements thereby 1. Device for correcting the tool solves that the displaceable tool Schlmerι in the control on two-spindle, numerically controlled S Corrective movement of the planing heather se bsttat.g in Machine tools, especially lathes, can be displaced with the opposite respect NEN, in which the even spindle is firmly on the plan. Such a design has the advantage that each The tool carrier is assigned to the slide and is independent of the others in its SoU-net is and for the other spindle a position can be brought, a, so an offsetting face slide movable tool slide io tion of the correction value of the planschhttens with the is provided, the cross slide and the correction value of the slidable on the cross slide Tool slide is no longer required due to the bar tool slide Motors are adjustable, which is part of position control. circle form, which KorrekUrsollwerte feed In an embodiment of the invention, are bar, characterized in that i _S that the Zuder the movable tool carriage movable tool carriage (4) self-for correction movement of the cross slide (1) at the level position control loop of the correction target value of the Cross slide with the opposite sign is actually displaceable in the opposite direction. .
is cash. According to another embodiment in the frame 2. Device according to claim 1, characterized in that the egg finding is the movable tool ham, that the shiftable th through remotely switchable clutches from sciium Tool slide (4) assigned position control motor can be uncoupled and connected to the drive of the face circle the correction setpoint for the cross slide can be coupled in such a way that its movement (1) can be supplied with the opposite sign. in the opposite direction on the Verschiebbaien 3. Device according to claim 1, characterized in that the tool slide can be transferred. Identified by this M * ß, that the movable tool is used to adjust the planschhttens μο-slide (4) by remote switchable clutches opposite adjustment of the one that can be moved on this Can be decoupled from its motor and attached to the tool slide without interfering with the numerical Drive of the cross slide (1) can be coupled, so control is possible. that its movement in opposite directions 30 In the drawing is an embodiment of the device shown schematically on the displaceable tool slide subject of the invention, (4) is transferable. namely, a block diagram shows a numerical one Control device with a device for Correcting the tool position on a two 35 spindle machine tool. A two-spindle, numerically controlled work- The invention relates to a device for the machine tool has a cross slide 1 with a yaw the tool position on two-spindle, nu- tool carriers 2 for a tool 3, finer merically controlled machine tools, in particular a tool slide 4 which is attached to the cross slide 1 other lathes in which one spindle 40 is slidably mounted and carries a tool 5, Tool carrier fixedly arranged on the cross slide The cross slide 1 is driven with the aid of a motor 6 is assigned and for the other spindle a shifted on the, the tool slide 4 with the help of a Cross slide movable tool slide in front of motor 7.