DE202014009233U1 - Guide and drawbar turning machine - Google Patents

Abstract

A lead screw machine comprising: a main spindle (1) driven by a first motor, a machine bed (2) having a carriage (3) reciprocable thereon in a z-direction, and a second motor (11) via a second motor (11) Transfer case (12) for moving the carriage (3) drivable pull spindle (13) and a lead screw (14), wherein the carriage (3) by means of the tension spindle (13) with a maximum first feed speed in the z direction is movable, a position determination device ( 20) for determining the position of a tool (9) received on the carriage (3) with respect to the machine bed (2), a controller (21) for controlling the movement of the second motor (11) in response to the position determining means (20) Position values and a predetermined desired position value, characterized in that the carriage (3), a third motor (18) for moving the carriage (3) with a maximum second feed rate attached, wherein the maximum second feed rate is greater than the maximum first feed rate, and on the carriage (3), a control device (19) for manually controlling the third motor (18) is provided.

Description

The invention relates to a master and tractor spindle turning machine according to the preamble of the protection claim 1. Such Leit- and Zugspindeldrehmaschine is from the EP 2 431 114 A2 known.

The known Leit- and Zugspindeldrehmaschine has a position determining device for determining the position of a tip of a tool received on the carriage with respect to the machine bed and a controller, with the movements of a servo motor for driving the control and traction spindle can be controlled. With the controller can z. B. a desired end position of a tip or cutting edge of the tool can be specified. The controller controls the servomotor so that the tip of the tool received on the carriage is moved exactly to the predetermined end position.

In practice, it is particularly in the production of large workpieces that the carriage is in a position which is relatively far away from a processing line and an end position predetermined at the end. A movement of the carriage in the direction of the processing path with the possible with the master and Zugspindelantrieb, maximum first feed rate would require a lot of time in this case. As a result, in such a case, the carriage is moved in the z direction using a lock box handwheel to near the processing line. This process is also relatively time consuming.

The object of the invention is to eliminate the disadvantages of the prior art. In particular, a master-and-spindle lathe is to be specified which enables precise, fast and efficient machining of a workpiece.

This object is solved by the features of patent claim 1. Advantageous embodiments of the invention will become apparent from the features of the claims 2 to 11.

According to the invention it is proposed that a third motor for moving the carriage with a maximum second feed speed is mounted on the carriage, wherein the maximum second feed rate is greater than the maximum first feed rate, and that on the carriage control means for manually controlling the third motor is provided.

By now according to the invention a third motor for moving the carriage is provided on the carriage, the carriage can be moved at a second feed speed in the direction of the processing path. The second feed rate is much greater than the maximum first feed rate, which is predetermined by the master and Zugspindelantrieb. It can be at least a 2, 3 or more times the first feed rate. It can thus be saved time to move the carriage in the direction of the processing line.

Advantageously, the third motor, a transmission downstream, which is automatically separated when switching on the third motor drivingly from the tension and the lead screw. Ie. when activating the third motor, the carriage is driven exclusively by means of the third motor. The transmission is advantageously also configured such that when the third motor is switched off, at least the traction spindle is automatically connected to the transmission in a driving manner. For automatic coupling and decoupling of the tension and / or lead screw, for example, a magnetic switch can be provided.

Advantageously, for driving the main carriage in the z-direction on the machine bed a drivingly coupled or coupled to the gear rack is provided. When the third motor is switched on by means of the control device, a pinion, which engages in the toothed rack, can be drivingly connected to the third motor.

According to a further advantageous embodiment, the carriage has a main carriage which can be moved in the z direction and a cross slide which is received on it and which is movable in an x direction perpendicular to the z direction. For manual movement of the main carriage in the z-direction is advantageously a lock case handwheel, and for moving the cross slide in the x direction, a plane spindle handwheel is advantageously provided on the carriage.

According to a further advantageous embodiment of the invention, a cross lever switch for selectively switching the transmission is provided on the carriage. Thus, the transmission can be switched so that can be moved with the Leit- and Zugspindelantrieb the main slide either in the z or in -z direction or the cross slide in the x or -x direction.

According to a particularly advantageous embodiment, the control device is designed as a button. The button is conveniently mounted on the cross lever switch. This can be done at the same time a default for the operation by means of the second feed rate by means of the third motor: For example, the carriage be moved by appropriate position of the cross lever switch by means of the control and Zugspindelantriebs in the z direction. By pressing the button provided on the cross lever switch, the master and traction spindle drive can now be automatically decoupled, the third motor can be drivenly coupled to the rack and, as a result, the carriage can be moved in the z direction at the second feed rate. When the button is released, the third motor is switched off and at the same time the toothed rack is drivingly disconnected from the third motor and the control and traction spindle drive is coupled in again. This enables a particularly fast and efficient way of working.

According to a further advantageous embodiment, the control is hierarchically superior to the control device, such that the third motor is stopped by means of the control, when a predetermined desired position value is reached in a conditional by actuation of the control device moving the carriage. For this purpose may be provided for controlling the third motor controllable by the controller frequency converter. - By the controller is hierarchically superior to the controller, the third motor can be controlled with the controller. It is advantageously possible to transfer to the controller a desired position value and then to move the carriage by the actuation of the control device with the second feed rate in the direction of the desired position value. As soon as the tool received on the carriage approaches the target position value, the third motor is decelerated by means of the controller and using the frequency converter and finally switched off as soon as the tip of the tool has reached the desired position value. This is also the case when the control device for controlling the third motor continues to be activated by an operator, that is, for example, the button is kept pressed.

According to a further advantageous embodiment of the invention, the second motor for driving the guide or traction spindle is a servomotor. As a result, similar to the third motor, the second motor is controllable with the controller so that the tool comes to a halt at a predetermined desired position value. The third motor can also be a servomotor.

In the proposed Leitspindeldrehmaschine the machine bed is advantageously designed so that a minimum peak length is 1000 mm.

An embodiment of the invention will be explained in more detail with reference to the drawings. Show it:

1 a schematic partial side view of a Leitspindeldrehmaschine and

2 a schematic block diagram.

In 1 is a main spindle 1 driven by a first motor (not shown). The main spindle 1 For example, is used to attach a chuck for clamping a workpiece. On a machine bed 2 is a carriage that can be moved back and forth in the z-direction 3 added. The z-direction is parallel to the axial direction of the main spindle 1 , The sled 3 includes a main carriage 4 with an attached lock case 5 , With the reference number 6 is a lock case handwheel, with which the main carriage 4 manually back and forth in z-direction is movable. On the main slide 4 is a cross slide 7 recorded, which with a Planspindelhandrad 8th is reciprocally movable in a direction perpendicular to the z-direction x-direction. The reference number 9 refers to a clamped tool, which optionally - as shown here - on a tool slide 10 can be included, which in turn relative to the cross slide 7 is movable back and forth.

A servomotor 11 drives over a transfer case 12 a tractor spindle 13 and a lead screw 14 at.

In the lock box 5 is recorded here not shown in detail transmission, which with a cross lever switch 15 optionally in engagement with the tractor 13 and / or lead screw 14 can be brought. With the reference number 16 is a gear selector designated, with the optional lead screw 14 can be switched on.

To move the main slide 4 by means of the tension spindle 13 is at the machine bed 2 a here only schematically indicated rack 17 provided, in which a pinion (not shown here) of the transmission engages or can be coupled.

The cross lever switch 15 is designed to move the main slide 4 in + z-direction to the right and in -z-direction to the left can be pivoted. Furthermore, the cross lever switch 16 perpendicular to the plane of the paper to move the cross slide 10 be moved back and forth in the x-direction or -x-direction. To move the cross slide 10 in the x-direction or -x-direction another (not shown here) spindle drive is provided, which optionally with the train 13 or the lead screw 14 is drivable.

With the reference number 18 is a third motor called, which at the lock box 5 is appropriate. The third engine 18 can by means of a button 19 , which at the free end of the cross lever switch 15 is intended to be turned on or off.

The function of the device is the following:
To move the main slide 4 in a z-direction to the right becomes the cross lever switch 15 moved to the right. As a result, the tension spindle 13 via the (not shown here) pinion drivingly with the rack 17 coupled, so the main slide 4 according to the movement of the servomotor 11 is moved to the right at a maximum first feed rate. The first feed rate is the maximum speed of the servomotor 11 , the specification of the transfer case 12 as well as the tension spindle 13 and limits the transmission (not shown) to a predetermined maximum value.

To increase the feed rate from the maximum first feedrate to a much higher maximum second feedrate, press the key 19 a so-called "rapid traverse" are activated. As soon as the button 19 is pressed, the tension spindle 13 decoupled and a driving connection between the third engine 18 and the (not shown here) pinion made so that the pinion now no longer on the tension spindle 13 but only via the third engine 18 is driven. It can thus be achieved a much higher second feed rate than in the case of a drive of the pinion via the tension spindle 13 , When you release the button 19 the third motor is drivingly disconnected from the pinion. The pinion is drivingly again with the tension spindle 13 coupled, so the main slide 4 is moved again at the first feed rate in the z direction. An analogous change of the feed rate from the first feed rate to the second feed rate can be made in -z-direction, -x-direction and x-direction.

A semi-automatic control of the "rapid traverse operation" is now based on the 2 explained in more detail.

The leading and traversing lathe comprises a position determining device 20 , with the x and z coordinates, such as a tip of the tool 9 or a corresponding component on the carriage 3 , captured and sent to a controller 21 be transmitted. With the controller 21 is the servomotor 11 in a conventional manner so controllable that the main carriage 4 or the cross slide 7 or a tip of the tool 9 can be stopped at a predetermined desired position value.

When in the controller 21 a predetermined desired position value or an end position is input and by means of the control device 19 the third engine 18 is turned on, a recording of the position values or coordinates continues to take place by means of the position determination device 20 , The position coordinates are constantly sent to the controller 21 transmitted and compared there with the predetermined desired position value. Once the tip of the tool 9 approaches the target position value, is by means of the controller 21 via a frequency converter 22 the third engine 18 when the setpoint position value is reached, it is reduced to 0. Thus, despite activated control device, ie despite pressed button 19 , prevents the tip of the tool 9 accidentally moves beyond the setpoint position value with the second feed rate into a workpiece. An analog semiautomatic mode of operation is of course also possible for the movement in -z direction, x direction and x direction.

The third engine 18 can also be configured as a servomotor. In this case, it can be immediate, ie omitting the frequency converter 22 , from the controller 21 be controlled.

LIST OF REFERENCE NUMBERS

1

main spindle

2

machine bed

3

carriage

4

main carriage

5

lock case

6

Schlosskastenhandrad

7

cross slide

8th

Planspindelhandrad

9

Tool

10

tool slide

11

third engine

12

Transfer Case

13

feed shaft

14

lead screw

15

Cross lever switch

16

Gear selector lever

17

rack

18

third engine

19

button

20

Location facility

21

control

22

frequency converter

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 2431114 A2 [0001]

Claims (11)

A lead-and-turn-wheel lathe, comprising: a main spindle driven by a first motor ( 1 ), a machine bed ( 2 ) with a carriage reciprocable thereon in a z-direction ( 3 ), one with a second motor ( 11 ) via a transfer case ( 12 ) for moving the carriage ( 3 ) driving spindle ( 13 ) and a lead screw ( 14 ), wherein the carriage ( 3 ) by means of the tension spindle ( 13 ) is movable with a maximum first feed rate in the z-direction, a position determining device ( 20 ) for determining the position of one on the carriage ( 3 ) recorded tool ( 9 ) with regard to the machine bed ( 2 ), a controller ( 21 ) for controlling the movement of the second motor ( 11 ) in dependence on the position determining device ( 20 ) certain position values and a predetermined desired position value, characterized in that the carriage ( 3 ) a third engine ( 18 ) for moving the carriage ( 3 ) is mounted at a maximum second feed rate, wherein the maximum second feed rate is greater than the maximum first feed rate, and on the carriage ( 3 ) a control device ( 19 ) for manually controlling the third motor ( 18 ) is provided. A lead-and-turn lathe according to claim 1, wherein the third motor ( 18 ) a transmission is arranged downstream, which when switching on the third motor ( 18 ) automatically from the train ( 13 ) and / or lead screw ( 14 ) is separated drivingly. A lead-and-turn-wheel lathe according to one of the preceding claims, wherein the transmission is designed such that when the third motor is switched off ( 18 ) automatically at least the tension spindle ( 13 ) is drivingly connected to the transmission. A lead-and-turn-lathe according to one of the preceding claims, wherein for moving the skin carriage ( 4 ) in the z-direction on the machine bed ( 2 ) a drivingly coupled or coupled to the transmission rack ( 17 ) is provided. A lead-screw lathe according to one of the preceding claims, wherein the carriage ( 3 ) a movable in the z direction main slide ( 4 ) and a recorded thereon, in a direction perpendicular to the z-direction x-direction movable cross slide ( 7 ) having. Leading and tensioning lathe according to one of the preceding claims, wherein on the carriage ( 3 ) a cross lever switch ( 15 ) is provided for selectively switching the transmission. A lead-screw lathe according to one of the preceding claims, wherein the control device ( 19 ) as a button and the cross lever switch ( 15 ) is attached. A lead-screw lathe according to any one of the preceding claims, wherein the controller ( 21 ) hierarchically the control device ( 19 ) is such that the third motor ( 18 ) by means of the controller ( 21 ) is stopped when, by pressing the control device ( 19 ) conditional movement of the carriage ( 3 ) the predetermined desired position value is reached. A lead-and-turn lathe according to one of the preceding claims, wherein for controlling the third motor ( 18 ) by means of the controller ( 21 ) controllable frequency converter ( 22 ) is provided. A lead-screw lathe according to one of the preceding claims, wherein the second motor ( 11 ) and / or the third motor ( 18 ) is a servomotor. A lead-screw lathe according to one of the preceding claims, wherein the machine bed ( 2 ) is designed so that a minimum peak length is 1000 mm.

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