CN212683336U

CN212683336U - Tool device with sensor and machine tool with tool device

Info

Publication number: CN212683336U
Application number: CN201890000484.1U
Authority: CN
Inventors: 马丁·布施卡; 马蒂亚斯·魏斯
Original assignee: Schaeffler Technologies AG and Co KG
Current assignee: Schaeffler Technologies AG and Co KG
Priority date: 2017-02-09
Filing date: 2018-02-07
Publication date: 2021-03-12
Anticipated expiration: 2028-02-07
Also published as: DE102017102578A1; WO2018145698A1

Abstract

The utility model provides a cutter device (2) and lathe (1) that has cutter device with sensor, cutter device (2) have cutter holding portion (9), cutter (8) and be used for picking up at least one sensor (11) of processing measured variable, wherein, cutter (8) have cutting edge carrier (9) and cutting edge body (10), wherein, cutter holding portion has the portion of holding (7) that is used for cutter (8), wherein, sensor (11) are arranged on cutter holding portion.

Description

Tool device with sensor and machine tool with tool device

Technical Field

The utility model relates to a cutter device for processing lathe of work piece, this cutter device have cutter holding portion and cutter, and wherein, the cutter includes cutting edge carrier and cutting edge body, and wherein, cutter holding portion has the portion of holding that is used for the cutter. The utility model discloses still relate to a lathe that has this cutter device.

Background

Cutting edge fittings are used in machine tools for separate production methods, which cutting edge fittings play a role in the machining and on which cutting wedges are present. The cutting edge attachment moves relative to the cutter. The cutting edge fittings are selected in view of the machining task and may differ from one another based on various different parameters or structural forms. Furthermore, cutting edge fittings form wearing parts in machine tools, wherein such cutting edge fittings have a limited service life and have to be replaced.

In some applications, sensors are used to monitor the manufacturing process in order to collect process data. In this case, the sensor is arranged as close as possible to the cutting-edge fitting in order to be able to pick up the process data as truly and as accurately as possible.

DE 19632148 a1 discloses a machine tool for metal cutting machining, which has a continuously operating system for monitoring the tool, wherein process variables are detected, evaluated and converted by measurement techniques for direct process control. In this case, a combined or several individual force, temperature and acceleration sensors are arranged on the sensitive region and in the immediate vicinity of the support surface of the tool carrier for the cutting edge body, in order to simultaneously acquire the measurement data, wherein a signal evaluation unit for processing the signal data is arranged in the tool carrier.

DE 102007005221 a1 describes the use of a piezo ceramic transducer for adjusting the machining of a workpiece. The converter is arranged on at least one location on the cutting tool comprising the carrier and the cutting edge element or in the region of the bearing of the cutting tool in contact with the carrier.

SUMMERY OF THE UTILITY MODEL

According to the utility model discloses a cutter device for processing lathe of work piece has cutter holding part and cutter, wherein, the cutter has cutting edge carrier and cutting edge body. The tool holder has a receptacle for a tool. Furthermore, at least one sensor for picking up a machining measurement variable is present, wherein the at least one sensor is arranged on the tool holder in a contactless manner with respect to the tool.

It has turned out that arranging the sensor in the region of the tool or adjacent to the cutting edge carrier will lead to considerable measurement errors. For example, in the case of a sensor arranged in the region of the interface between the tool holder and the cutting edge carrier, in which measurement acquisition takes place between two vibrating components, relative movements between these two components may occur, which may prove to adversely affect the measurement results. A reliable and loadable evaluation can only be carried out reproducibly if at least one sensor is spaced from the intersection of the cutting edge carrier and is therefore arranged on the tool carrier in a contactless manner with the cutting edge carrier. In the case of at least one sensor arranged in the region of the tool holder, the mechanical load is reduced, since damage by chips or the like is less likely to occur in this case than in the case of an arrangement on the tool itself. The service life of the entire tool arrangement and in particular of the at least one sensor is thus increased.

The subject of the invention is a tool arrangement which is suitable and/or configured for a machine tool. The machine tool may be, for example, a lathe or a milling machine. The tool is used for machining a workpiece. Preferably, the workpiece is configured as a metal workpiece. The machining is in particular a separating machining, in particular a cutting machining.

The cutter device has a cutter holding portion and a cutter. The cutter includes a cutting edge carrier and a cutting edge body. The cutting edge body has, in particular, a cutting edge fitting. It may be provided that the cutting edge body may form a cutting edge of unspecified geometry. It is preferred that the cutting blade body has a geometrically specific cutting blade. The cutting blade body is arranged in a detachable and/or replaceable manner in the cutting blade carrier.

The tool holder has a receptacle for a tool, in particular for a cutting-edge carrier. The cutting blade carrier is arranged in the receptacle in a detachable and/or replaceable manner.

In particular, the tool arrangement, in particular the tool holder and/or the tool, is preferably arranged in the machine tool in a stationary manner.

In the context of the present invention, it is provided that the tool arrangement has at least one or exactly one sensor for picking up a machining measurement variable, wherein the sensor is arranged on the tool holder in a contactless manner with respect to the tool. The sensor may be arranged on the outer face or in the interior of the tool holder. The process measurement variable is in particular a process measurement variable during the processing of the workpiece.

The advantage of the invention here is that the tool holder is a structural component with parts which are less prone to wear than the tool. Thus, it is not necessary to replace sensors arranged, in particular integrated and/or attached, to these components when replacing the tool. Thus, it is possible to add one sensor or a plurality of sensors to the tool arrangement at a time and to continuously provide process data as a process measurement variable. In particular, when changing tools or changing equipment for machine tools, the at least one sensor does not have to be changed. Thus, the at least one sensor is not a consumable part. The tool arrangement can thus be used in a significantly flexible manner, since the change of equipment can be carried out in a simple manner regardless of the sensor.

Preferably, the sensor is safely arranged so that it is protected from wear and from process field conditions, such as those caused by cooling lubricants or swarf. For example, it is preferred that the cable with the at least one sensor is guided in or on the tool holder so as to be protected from chips and cooling lubricant. Another advantage is that different tools with different tool geometries can be used in the tool holding portion. Therefore, in the case of a cutter of plural kinds of cutting edges, the plural kinds of cutting edges can be monitored with only one sensor arranged in the cutter holding portion. It is therefore possible to dispense with the provision of a sensor for each tool.

In a preferred embodiment of the invention, the sensor is designed as a temperature sensor for monitoring temperature, as a force sensor for monitoring force, as an acceleration sensor for monitoring acceleration, as a vibration sensor for monitoring vibrations and in particular structural noise, or as a multi-criteria sensor, wherein the multi-criteria sensor can comprise any selection of the aforementioned sensors or further sensors. Thus, the sensor can be adapted to the desired process measurement variable.

In a possible embodiment of the invention, the receptacle in the tool holder can be designed as a rectangular receptacle for receiving a cutting-edge carrier having a rectangular cross section or as a circular receptacle for receiving a cutting-edge carrier having a circular cross section.

In a development of the invention, the tool holder has a tool base frame and a tool changing frame. The receptacles for the tools are arranged in a tool changing rack, and the tool base is preferably connected to the machine tool in a stationary, in particular non-detachable manner. In this embodiment, the tool changing rack can be replaced by tools.

It may be provided that at least one sensor may be arranged on the tool changing rack. This has the advantage that the at least one sensor is positioned close to the process, but has the disadvantage that the at least one sensor must be replaced therewith when the tool changing rack is replaced. In this case, it is particularly preferred that the at least one sensor is arranged on the tool base and therefore does not have to be replaced.

In an exemplary embodiment, the at least one sensor is arranged on an outer face, in particular a lateral face, of the tool base frame. The sensor is particularly well protected on the side because contaminants do not or hardly adhere to the side due to gravity and thus to the sensor.

In a development or alternative of the invention, the at least one sensor is arranged on an outer face, in particular a side face, a top face and/or a bottom face, of the tool changing rack.

In an exemplary embodiment, the cutting edge body is configured as an insert, in particular as an indexable insert.

As described above, another subject matter of the present invention is formed by a machine tool having the cutter device.

Drawings

Other features, advantages and technical effects of the present invention will become apparent from the following description of the preferred embodiments of the present invention and the accompanying drawings. Wherein:

fig. 1 shows a schematic block diagram of a cutter device as an embodiment of the present invention;

fig. 2 and 3 show two embodiments of a tool changing rack for the tool arrangement of fig. 1.

Detailed Description

Fig. 1 shows a schematic block diagram of a machine tool 1 with a tool arrangement 2. A stationary section 3 of a machine tool 1 is shown, on which a tool carrier 4 is arranged. The tool carrier 4 is thus designed as a stationary section of the machine tool 1. A tool changing rack 5 can be detachably arranged on the tool base rack 4. The tool base frame 4 and the tool changing frame 5 together form a tool holding portion 13. The tool changing rack 5 has, for example, corners 6 as interfaces for detachable coupling to the tool base rack 4.

In addition, the tool changing rack 5 has a housing 7 in which tools 8 are arranged. The tools 8 are arranged in a detachable manner in the receptacles 7 and/or in the tool changing rack 5. The cutter 8 has a cutting edge carrier 9 and a cutting edge body 10. The cutting edge body 10 has, for example, a geometry-specific cutting edge. The cutting blade body may carry a plurality of such cutting blades. The cutting edge carrier 9 is configured as an intermediate element between the cutting edge body 10 and the tool changing rack 5.

In the embodiment shown in fig. 1, the cutting-edge carrier 9 has a rectangular cross-section. As can be gathered in particular from fig. 2, which likewise shows a tool changing rack 5 for receiving a cutting edge carrier 9 having a rectangular cross section, the receptacle 7 likewise has a rectangular receptacle cross section. As an alternative to this, the cutting-edge carrier 9 can also have a circular cross section, which can then be accommodated in the tool-changing rack 5 with the accommodation 7 having a circular accommodation cross section, as shown in fig. 3.

For example, the cutting edge body 10 may be configured as a cutting tool, in particular a replaceable blade.

When changing the machine tool 1, the cutting blade body 10 must be replaced due to, for example, wear. When a corresponding change is made, the cutting edge carrier 9 is usually removed from the tool changing rack 5. In other words, the tool 8 is removed. In the case of a larger retrofit of the machine tool 1, the tool changing rack 5 is replaced, for example, in order to accommodate tools 8 with different cross sections, as shown in fig. 2 and 3.

The tool arrangement 2 has at least one sensor 11 for picking up a machining measurement variable. In the first embodiment, the sensor 11 may be arranged on the tool base frame 4. It is possible here for the sensor (as shown) to be arranged on the side, since the sensor is oriented vertically and the contamination is detached from the sensor 11 by gravity. The sensor 11 can also be arranged such that it is integrated in the tool base frame 4. Alternatively or additionally, it is possible for the sensor 11 to be arranged on a side, top, bottom or front side of the tool changing rack 5.

The advantage obtained in the case of a sensor 11 arranged on the tool carrier 4 is that the sensor 11 remains stationary at all times, regardless of the manner in which the machine tool 1 and/or the tool arrangement 2 is retrofitted. The advantage obtained in the case of a sensor 11 arranged on the tool changing rack 5 is that the sensor 11 is closer to the actual machining process and only has to be removed together with the tool changing rack 5 when the tool changing rack 5 is replaced. Therefore, when only the cutting blade body 10 is replaced, it is not necessary to disassemble the sensor.

Thus, the sensor 11 forms a stationary device when it is arranged on the tool carrier 4, or an approximately stationary device when the sensor 1 is arranged on the tool changing rack 5. In both cases, it is possible to route possible cables for supplying voltage and/or for conducting signals in the tool arrangement 2 in a protected manner.

As an alternative, it is also possible to integrate the signals of the sensor or sensors 11 in an evaluation device 12 in order to evaluate the process measurement variables and in this way convert them into a process monitoring of the production process. The sensor 11 may be configured as a temperature sensor, a force sensor, an acceleration sensor, a vibration sensor or as a multi-criteria sensor. The machining may be milling, turning, cutting, etc.

Fig. 2 shows a schematic three-dimensional view of the tool changing rack 5, wherein the possible positioning of the sensor 11 is again shown in circles. Sensors 11 are indicated on the upper, lower and end sides of the tool changing rack 5. In the same way, fig. 3 shows a different positioning of the sensor 11 on the tool changing rack 5.

List of reference numerals

1 machine tool

2 tool device

3 stationary section

4 cutter base frame

5 tool changing rack

6 corner

7 accommodating part

8 cutter

9 cutting edge carrier

10 cutting edge body

11 sensor

12 evaluation device

13 tool holding part

Claims

1. Tool arrangement (2) with a sensor, the tool arrangement having:

a tool holding section (13);

a tool (8), wherein the tool (8) has a cutting edge carrier (9) and a cutting edge body (10),

wherein the tool holder (13) has a receptacle (7) for the tool (8); and

at least one sensor (11) for picking up process measurement variables,

it is characterized in that the preparation method is characterized in that,

the at least one sensor (11) is arranged on the tool holder (13) in a contactless manner with respect to the tool (8).

2. The tool arrangement (2) according to claim 1, characterized in that the sensor (11) is configured as a temperature sensor, a force sensor, an acceleration sensor or a vibration sensor.

3. Tool arrangement (2) according to claim 1 or 2, characterized in that the receptacle (7) is configured as a rectangular receptacle or as a circular receptacle.

4. Tool arrangement (2) according to claim 1 or 2, characterized in that the tool holder (13) comprises a tool base frame (4) and a tool changing rack (5).

5. Tool arrangement (2) according to claim 4, characterized in that the at least one sensor (11) is arranged on an outer face of the tool base frame (4).

6. Tool arrangement (2) according to claim 4, characterized in that the at least one sensor (11) is arranged on an outer face of the tool changing rack (5).

7. A knife device (2) according to claim 1 or 2, characterized in that the cutting edge body (10) is configured as a blade.

8. Machine tool (1), characterized by a tool arrangement (2) according to any one of claims 1-7.