WO2023053778A1

WO2023053778A1 - Device for machine tool, and machine tool

Info

Publication number: WO2023053778A1
Application number: PCT/JP2022/031641
Authority: WO
Inventors: 頼人國府田
Original assignee: Dmg森精機株式会社
Priority date: 2021-09-29
Filing date: 2022-08-23
Publication date: 2023-04-06
Also published as: JP2023049230A; JP7133075B1

Abstract

This device for a machine tool can be attached to an attachment part of a machine tool in such a manner as to be detachable therefrom and rotatable together with a rotary member disposed within the attachment part, and comprises: a rotary part that rotates along with the rotation of the rotary member; an electrical circuit that is capable of exchanging data with the outside; and a functional part that is connected to the electrical circuit, that is capable of executing a function controlled by the electrical circuit, and that rotates in the same direction as the rotational direction of the rotary part along with the rotation of the rotary part. The functional part can be attached to and detached from the rotary part.

Description

Equipment for machine tools and machine tools

This invention relates to a machine tool device that can be attached to and detached from a machine tool.

Machine tools include a machine that processes a workpiece with a tool attached to its spindle, a machine that processes a workpiece by rotating a workpiece with multiple tools attached to a turret, and a machine that performs additional machining while melting the material with a laser. There are also multi-tasking machines equipped with

In recent years, in addition to machining, the number of functions that can be performed by machine tools, such as attaching cameras to machine tools and observing workpieces, has increased. In order to realize these functions, a device for machine tools that can be attached to and detached from a machine tool has been developed (Patent Document 1).

Japanese Patent No. 6656707

Patent Literature 1 discloses a machine tool camera as a machine tool device that can be attached to and detached from a machine tool. The machine tool camera of Patent Document 1 has a built-in battery because there is no power source for supplying power to the main spindle on which the tool of the machine tool is attached. Therefore, the machine tool camera tends to be large.
Further, the machine tool camera only outputs image data taken for observation. Therefore, data processing such as image processing is performed after the data is transmitted to the outside, and the processing cannot proceed unless it is an external computer.

Therefore, the present invention provides the devices and the like described in the claims.

It becomes possible to process data within the equipment for machine tools.

It is an external view inside a machine tool. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an example machine tool device that is attachable to and rotatable from a machine tool; FIG. 4 is a cross-sectional view of a spindle, an attachment mechanism, and a rotation mechanism of the machine tool device; 1 is a cross-sectional view of wiring, electrical and optical components in a machine tool device; FIG. FIG. 4 is a cross-sectional view of the cable housing portion and the winding portion at a rotation angle of 0 degrees; It is a cross-sectional view of the cable housing portion and the winding portion at a rotation angle of 360 degrees. 1 is a configuration diagram of an electrical circuit included in a spindle and a device for a machine tool; FIG. FIG. 10 is a diagram showing a replaceable functional part; 1 is an external view of a machine tool; FIG. FIG. 10 is a cross-sectional view of the interior of the machine tool device in modification 1; 4 is a wiring diagram between an electric circuit board and an imaging unit; FIG. 3 is a configuration diagram of an integrated circuit in a fixed part and a functional part; FIG.

A machine tool device and a machine tool that are attachable to and detachable from the machine tool according to the embodiment will be described below with reference to the drawings. In the following description, the same components are denoted by the same reference numerals.

≪Machine tools≫
In this embodiment, in the process of machining based on the NC program, when the tool is changed based on the NC program, the tool to be used next is automatically machined by a tool changer (ATC (Automatic Tool Changer)). A machine tool in which a tool can be attached to a mounting portion (for example, a spindle or a turret) of the machine will be described. The attachment portion of the machine tool of the present embodiment can attach a tool to machine a work. It is also possible to attach equipment for machine tools instead of tools. Therefore, the attachment part is detachably attached to the machine tool device.

FIG. 1 is an external view of the inside of a machine tool.
The illustrated machine tool example is a vertical machining center. The machine tool has a bed 802 and a column 804 installed on the bed 802 . A spindle head 806 is attached to the column 804 . The spindle head 806 is movable in the Z-axis direction (vertical direction). The spindle 100 is provided at the tip of the spindle head 806 . Main shaft 100 includes rotating member 106 therein. The rotating member 106 is rotatable around a rotating shaft extending in the Z-axis direction. By attaching a tool to the rotating member 106 of the spindle 100 , the machine tool device 600 can be attached to the spindle 100 .

The bed 802 is equipped with a saddle 810 movable in the Y direction. A table 814 movable in the X direction is installed on the saddle 810 . A workpiece to be processed and measured is placed on the table 814 . The machine tool moves the saddle 810 and the table 814 in the XY directions to change the relative positions of the workpiece and the machine tool device 600 . Similarly, the machine tool changes the distance between the workpiece and the machine tool device 600 by vertically moving the spindle head 806 .

The spindle 100 is an example of a "machine tool mounting portion" to which the machine tool device 600 is mounted. If the machine tool is a turning center, the turret corresponds to the "mounting part of the machine tool". The machine tool device 600 may be attached to the turret to image the workpiece. Further, in the multitasking machine, an attachment portion may be provided and the machine tool device 600 may be attached to the attachment portion. In either case, the machine tool device 600 can be attached to and detached from the “mounting portion of the machine tool”, and a part of the machine tool device 600 together with the “rotating member 106 in the mounting portion” can be attached to the machine tool and the mounting portion. rotatable and attached to the The machine tool device 600 attached to the spindle 100 performs predetermined functions (for example, imaging, touch measurement, laser scanning, etc.).

The machine tool in this embodiment has a mounting portion to which a machine tool device can be attached. For example, the mounting portion is a main shaft or a turret, and in the case of a main shaft, the main shaft 100 includes a cylindrical portion 101 and a rotating member 106 .

<<machine tool device 600>>
Machine tool devices that can be attached to and detached from machine tools include imaging devices, touch probes, laser scanners, angle heads, tools with angle heads, electric tools, tools with functions, ultrasonic generators, and laser oscillators.
The machine tool device 600 of the present embodiment is a machine tool device that can be detachably and rotatably attached to the machine tool among the machine tool devices described above.

The machine tool device 600 includes electrical components such as an image sensor (imaging device), various sensors such as a temperature sensor and a piezoelectric sensor, and oscillators such as a laser oscillator and a millimeter wave oscillator. The machine tool device 600 may also include mechanical components such as actuators and motors. Of course, the machine tool device 600 may be provided with only one of these electrical components, a plurality of such electrical components, or an electrical component and a mechanical component. Furthermore, the machine tool device 600 may be provided as a module that includes circuits such as an LSI (Large Scale Integration) and a CPU (Central Processing Unit) that process signals output from these electrical and mechanical components. .

When using the machine tool device 600, it is necessary to supply electric power to electric and mechanical parts driven by electric power. When the machine tool device 600 is an imaging device, it has an imaging unit including an image sensor (for example, CMOS (Complementary MOS)) and an electric circuit for controlling the image sensor as a functional section. In other words, the image sensor and electric circuit in the imaging unit operate based on power supplied from the outside. Power supplied from the outside is preferably supplied using a technology (PoE (Power Over Ethernet) technology) for transmitting data and power through a cable used in Ethernet wiring. Imaging by the imaging unit is performed by processing an imaging operation instruction transmitted from the cable described above by a CPU or LSI, which is an electrical circuit, and transmitting a control signal from the CPU or LSI to the imaging unit. The image data captured by the imaging unit may be transmitted as it is to the outside of the machine tool device 600. However, the necessary image processing is performed in the main circuit 570 in the machine tool device 600, and the image data is transmitted via the above-mentioned cable. It is preferable that the information is sent to a device outside the machine tool device 600 (for example, a computer inside the machine tool, a server outside the machine tool).

By using the above-described PoE technology in the machine tool device 600, it becomes possible to make the device more compact than a battery built-in type machine tool device or a wireless power supply type machine tool device. As the size of the machine tool device increases, the possibility of interference occurring in the machine tool increases.

Further, by using the above-described PoE technology (performing data communication via a wired cable) in the machine tool device 600, communication is more stable than wireless communication.
On the other hand, it is necessary to provide wiring inside the machine tool, and there are restrictions on how to arrange the wiring.

(Battery system, wireless system, wireless communication system for equipment for machine tools)
Differences from other configurations will be described below.
First, a method of supplying electric power by providing a battery inside a machine tool device and storing power in the battery will be described. With such a built-in battery system, there is no need to provide an electrical contact between the machine tool and the device for the machine tool. On the other hand, since the battery is built in, the machine tool device itself tends to be large. In addition, the operation time of the machine tool device is limited because it does not operate when the battery runs out.

Next, we will discuss the method of wirelessly supplying power using electromagnetic induction. With the wireless power supply method, there is no need to provide a mechanical contact for power supply between the machine tool and the device for the machine tool. On the other hand, it is necessary to provide coils for both the machine tool and the device for machine tools, and in order to obtain sufficient power, the occupied volume of the coils tends to increase, and the device for machine tools tends to be large.

Furthermore, the wireless communication method using Wi-Fi (registered trademark) will be described. Wi-Fi is an example of a wireless LAN. With Wi-Fi, it takes time to establish a wireless communication channel between the machine tool device and the communicating device. There is also an effect on radio waves from other devices between the machine tool device and the device that communicates via Wi-Fi. In addition, since it may take time to transmit and receive signals and data, real-time communication is low when the machine tool device is operated from the outside.

[Embodiment]
FIG. 2 is a perspective view of an example machine tool apparatus 600 that is attachable to and rotatable from a machine tool.
(Overview of machine tool device 600)
A machine tool device 600 of the present embodiment is an image probe mounted on a machine tool and used for imaging a workpiece. As will be described later, the machine tool device 600 is electrically connected to the machine tool by a connector, so that it is possible to supply power and communicate by wire.

The machine tool device 600 has a shank 202 on the spindle 100 side in the attitude of being attached to the spindle 100 . The machine tool device 600 is attached to the spindle 100 by fitting the shank 202 to the rotating member 106 of the machining center, which is a machine tool. The mounting method is the same as for the tool. A machine tool tool changer may grasp the gripper 204 to move the machine tool device 600 and attach it to the rotating member 106 .

(Overview of function unit 400)
The machine tool device 600 is provided with the functional part 400 on the side opposite to the mounting side when mounted on the mounting part in the posture mounted on the mounting part. The functional unit 400 is a unit capable of executing predetermined functions (for example, imaging, touch measurement, laser scanning, etc.). An example of the functional unit 400 of this embodiment includes an imaging element and an optical system (for example, a lens, a mirror, and a splitter), and has an imaging function of performing imaging with the imaging element upon receiving an imaging instruction. Note that the machine tool device 600 has a connecting portion 300 . Connector 300 will be described later in connection with FIG. The functional part 400 is attachable to and detachable from the connecting part 300 , the part that joins with the connecting part 300 is called a joint part 401 , and the part other than the joint part 401 is called a main body part 403 . The main body part 403 of this embodiment has a cylindrical shape and includes an action part that causes the machine tool device 600 to perform a predetermined function.

When the rotating member 106 rotates about the rotation axis within a range of 0 to 360 degrees, the shank portion 200, the connecting portion 300, and the functional portion 400 rotate together, and the fixed portion 500 does not rotate. Thereby, the functional unit 400 can change its orientation within a range of 0 degrees to 360 degrees around the rotation axis. In other words, it is possible to pick up images while changing the orientation within the range of 0 to 360 degrees. Note that the rotation axis of the rotating member 106 is the center line of the cylindrical rotating member 106 . Although the optical axis of the functional unit 400 of this embodiment is described as being aligned with the extension of the rotation axis of the rotating member 106, it is not limited to this. For example, when there are three imaging units in the functional section, the optical axis and the rotation axis are parallel, but they can be arranged at positions where the optical axis and the rotation axis do not match.

(Overview of fixed portion 500)
The machine tool device 600 includes a stationary part 500 . The fixed portion 500 is fixedly attached to the cylindrical portion 101 of the main shaft 100 . Therefore, when the rotating member 106 rotates, the fixed part 500 does not rotate together with the rotating part 601 (see FIG. 3) having the shank part 200 and the coupling part 300 . A cylindrical support portion 502 of the fixed portion 500 supports the rotating portion 601 so that it can rotate. Therefore, the fixed part 500 is arranged so as to surround the rotating part 601 when viewed along the rotation axis of the rotating part 601 .

(Outline of locking block 108)
The fixed part 500 has an extension part 508 protruding from the side of the cylindrical support part 502 . The extension 508 is locked (engaged and locked) with a locking block 108 protruding from the front cover 102 of the main shaft 100 . The lock block 108 is a part of the cylindrical portion 101 of the main shaft 100 and is a member that does not rotate while the rotating member is rotating. Extension 508 and locking block 108 prevent stationary portion 500 of machine tool assembly 600 from co-rotating with a rotating member. That is, the fixed portion 500 is fixedly attached to the locking block 108 (an example of the non-rotating portion) that is a part of the cylindrical portion 101 of the main shaft 100 . Means of locking are described in connection with FIG.

Also, the locking block 108 and the extension 508 are provided with electrical contact means. Signal lines and feed lines (power lines) are secured by this contact means. Contact means are described in connection with FIG. The communication and power supply in this example shall comply with the PoE (Power over Ethernet) standard. PoE is based on the Ethernet, and has specifications that allow power to be supplied. Ethernet is a kind of wired LAN (Local Area Network) standard.

(rotating part and non-rotating part)
The rotatable and non-rotatable portions of the machine tool device 600 are organized. As the rotating member 106 of the machine tool rotates, the shank 202, the gripper 204 and the functional part 400 of the machine tool device 600 rotate. In addition, a connecting portion 300 (see FIG. 3) of a machine tool device 600, which will be described later, also rotates. The rotation axes of the shank 202 , the grip portion 204 , the connection portion 300 and the functional portion 400 are aligned with the extension of the rotation axis of the rotating member 106 . On the other hand, the cylindrical portion 101 of the spindle 100 (part of the cylindrical portion 101 includes the front cover 102, the housing 104, the locking block 108, etc.), the fixed portion 500 of the machine tool device 600 (cylindrical support portion). 502 and extensions 508, etc.) do not rotate.

As shown, the diameter Dy of the functional portion 400 is shorter than the outer diameter Dx of the fixed portion 500. Therefore, when the machine tool device 600 is attached to the spindle 100, the outer circumference of the functional section 400 is positioned inside the outer circumference of the fixed section 500 when viewed from the direction along the rotation axis of the rotating section 601 (see FIG. 3). located in The outer diameter Dx of the fixed portion 500 here is specifically the outer diameter of the cylindrical support portion 502 , and the outer circumference of the fixed portion 500 is the outer circumference of the cylindrical support portion 502 . The diameter Dy of the functional portion 400 here is specifically the diameter of the main body portion 403 , and the outer circumference of the functional portion 400 is the outer circumference of the main body portion 403 . As will be described later, since the electric circuit board including the main circuit is provided in the fixing portion 500 instead of providing the electric circuit board including the main circuit in the function portion 400, the size of the function portion 400 can be reduced.

FIG. 3 is a cross-sectional view of the attachment mechanism and rotation mechanism of the spindle 100 and the machine tool device 600 .
The attachment mechanism and rotation mechanism are mainly shown, and the electrical and optical configurations are omitted. Wiring, electrical and optical components, etc. within the machine tool apparatus 600 are described below in connection with FIG.

(Structure of spindle 100)
The rotating member 106 is rotatably supported by the housing 104 and rotated by being driven by a servomotor. A front cover 102 is provided at the front end of the main shaft 100 and covers the housing 104 . A front end of the rotating member 106 protrudes from a hole in the front cover 102 . By rotating the rotating member 106 to a predetermined rotation angle with a servomotor, the functional part 400 can be adjusted to the predetermined rotation angle. Cylindrical portion 101 includes all components of main shaft 100 other than rotating member 106 (front cover 102, housing 104, locking block 108, etc.). The entire cylindrical portion 101 corresponds to the non-rotating portion of the main shaft 100 .

(Rotating part 601)
A machine tool device 600 includes a rotating portion 601 composed of a shank portion 200 and a connecting portion 300 . The rotating part 601 is attached to the machine tool so that it can rotate together with the rotating member 106 . Also, the functional portion 400 is attached to the rotating portion 601 . Accordingly, the functional portion 400 rotates in the same direction as the rotating portion 601 as the rotating portion 601 rotates. The main shaft 100 rotatably attaches the rotating part 601 of the machine tool device 600 together with the rotating member 106 .

Specifically, the shank portion 200 includes a shank 202 fixed to the rotating member 106 and a grip portion 204 to be gripped by the tool changer. The connecting portion 300 is fixed to the shank portion 200 with a tool holder mounting bolt 302 . The connecting portion 300 is supported inside the fixed portion 500 so as to rotate.

The functional part 400 is fixed to the connecting part 300 with bolts 402 . Therefore, the functional section 400 is attachable to and detachable from the rotating section 601 . As a method other than the fixing method using the bolts 402, the functional unit 400 may be detachable by a fitting mechanism of a mechanical mechanism. The connecting portion 300 has a third connector 340 on a surface that contacts the functional portion 400 , and the functional portion 400 has a fourth connector 440 at a position facing the third connector 340 . When the functional part 400 is fixed to the connecting part 300, the third connector 340 and the fourth connector 440 are joined. Both the third connector 340 and the fourth connector 440 are connectors for USB (Universal Serial Bus). Spring connectors may be used as the third connector 340 and the fourth connector 440 . However, the contact parts are not limited to this example. USB wiring will be described later. The fourth connector 440 and the hole through which the bolt 402 is passed are included in the joint portion 401 .

(fixed part 500)
The machine tool device 600 comprises a fixed part 500 consisting of a cylindrical support part 502 and an extension part 508 . A support portion 502 of the fixed portion 500 rotatably supports the connecting portion 300 by a first bearing 504 and a second bearing 506 . That is, the support portion 502 corresponds to a housing that accommodates the rotating connecting portion 300 as a mechanical element.

A cylindrical positioning portion 510 is provided on the extension portion 508 of the fixing portion 500 . The positioning part 510 fits into the non-rotating part 110 formed in the locking block 108 of the main shaft 100, serves as a guide during mounting, and fixes the fixing part 500 so that it does not rotate. Thus, the spindle 100 fixedly attaches the fixed portion 500 of the machine tool device 600 to the locking block 108 (an example of the non-rotating portion). In addition, locking block 108 has first connector 120 on the surface in contact with extension portion 508 , extension portion 508 has second connector 520 at a position facing first connector 120 , and positioning portion 510 is non-removable. When inserted into the rotating portion 110, the first connector 120 and the second connector 520 are joined. Both the first connector 120 and the second connector 520 are connectors for Ethernet. Spring connectors may be used as the first connector 120 and the second connector 520 . However, the contact parts are not limited to this example. Details will be described later with reference to FIG.

When the rotating member 106 of the spindle 100 rotates, the rotating part 601 (the shank part 200 and the connecting part 300) of the machine tool device 600 and the functional part 400 rotate as one, but are locked by the locking block 108. The stationary part 500 of the machine tool device 600 does not rotate. A single structure of the machine tool device 600 is such that when the fixed part 500 is fixed, the rotating part 601 and the functional part 400 can rotate with respect to the fixed part 500 . Conversely, the independent structure of the machine tool device 600 is such that when the rotating part 601 and the functional part 400 are fixed, the fixed part 500 can rotate with respect to the rotating part 601 .

FIG. 4 is a cross-sectional view of the wiring, electrical and optical components within machine tool apparatus 600 .
(Outline of Ethernet wiring)
An Ethernet cable and an Ethernet connector are used as wiring for Ethernet communication and PoE power supply. Specifications of Ethernet cables and Ethernet connectors are defined as standards. As described above, the first connector 120 and the second connector 520 are both Ethernet connectors and are connected to Ethernet cables. Spring connectors may be used as the first connector 120 and the second connector 520 . However, the contact parts are not limited to this example.

The second connector 520 of this embodiment is a male connector with eight contact pins. The first connector 120 is a female connector with eight contact holes. When the machine tool device 600 is brought closer to the spindle 100 by the tool changer, the second connector 520 and the first connector 120 are brought closer so that each contact pin fits into each contact hole. When the machine tool device 600 is attached to the spindle 100, the second connector 520 and the first connector 120 are connected. Here, an example of an 8-pin connector is shown, but a connector with 9 or more pins may be used, or a connector with 7 or less pins may be used. Since Ethernet communication and PoE can be realized with at least four lines, connectors with four or more pins can be used. For example, a 4-pin connector may be used.

If the first connector 120 on the machine tool side is a female connector, there is an aspect that foreign objects such as metal chips are less likely to get caught. However, the relationship between males and females may be reversed. That is, the second connector 520 may be a female connector with eight contact holes and the first connector 120 may be a male connector with eight contact pins. The contact pins and contact holes have the functions of power terminals and communication terminals. An Ethernet cable includes a feeder line (power line) and a communication line, and the contacts included in the Ethernet connector function as a feeder terminal (power terminal) connected to the feeder line (power line) and a communication terminal connected to the communication line.

This wiring electrically connects the PSE (Power Sourcing equipment) module on the spindle 100 side and the PD (Powered device) module on the machine tool device 600 side. PSE refers to power supply equipment in PoE. In this example, spindle 100 is the PSE. A PSE module is an electric circuit for realizing the power supply function and communication function of the PSE. PD refers to a power receiving device in PoE. In this example, machine tool device 600 is a PD. A PD module is an electric circuit for realizing the power receiving function and communication function of the PD. The PSE module and PD module are described below in connection with FIG.

An Ethernet cable 122 connected to the PSE module is connected to the first connector 120 through the interior of the lock block 108 . An Ethernet cable 521 connected to a second connector 520 connected to the first connector 120 is connected to the inside of an electric circuit board 544 through a wiring path 523 . In this way, the fixed part 500 arranges the Ethernet cable 521 (including the feeder line) connected to the spindle 100 .

Each transmission line included in the Ethernet cable 521 connects to a PD module within the electrical circuit board 544 . Therefore, when the first connector 120 of the spindle 100 and the second connector 520 of the machine tool device 600 are joined together, the PD module and the PSE module are electrically connected. This allows the PSE module to detect the PD module, perform initialization operations in the PSE module and the PD module, and enable power supply and communication between the PSE module and the PD module.

(Overview of USB wiring)
A USB cable and a USB connector are used as wiring for USB communication and power supply between the electric circuit board 544 and the imaging unit 446 . Specifically, the electric circuit board 544 and the imaging unit 446 are connected via the USB cable 525 , the third connector 340 , the fourth connector 440 and the USB cable 445 . Both the third connector 340 and the fourth connector 440 are USB connectors and are connected to USB cables. Spring connectors may be used as the third connector 340 and the fourth connector 440 . However, the contact parts are not limited to this example. Although not shown in FIG. 4 , the coaxial epi-illumination 454 and the ring illumination 456 are also connected to the electric circuit board 544 via the USB cable 525 , the third connector 340 , the fourth connector 440 and the USB cable 445 . In this way, functional unit 400 is connected to electric circuit board 544 via a communication path of USB cable 525 , third connector 340 , fourth connector 440 and USB cable 445 .
Although this embodiment has been described using a USB cable, it is not limited to this. A power supply line for power supply and a communication line for communication may be provided, and wiring may be provided for each.

Either of the third connector 340 and the fourth connector 440 can be male and which can be female. In addition, the USB cable includes a power supply line (power line) and a communication line, and the contacts included in the USB connector function as a power supply terminal (power terminal) connected to the power supply line (power line) and a communication terminal connected to the communication line. .

(Cable housing portion 526)
The fixed portion 500 includes a cable housing portion 526 . The cable accommodating portion 526 is located in the wiring path connecting the electric circuit board 544 and the third connector 340 . The cable accommodating portion 526 forms an annular space around the rotation axis of the rotating portion 601 at the boundary of the fixed portion 500 and the rotating portion 601 (see FIGS. 5 and 6). The cable accommodating portion 526 accommodates the USB cable 525 wound multiple times. A margin is also provided for multiple turns of the USB cable 525, as described below in connection with FIG. That is, in the cable accommodating portion 526 , a gap is provided so that the shape of the USB cable 525 wound multiple times can be changed according to the rotation angle of the rotating portion 601 .

(Winding portion 304)
Coupling portion 300 comprises a winding portion 304 having a gripping portion 306 . A midpoint of the USB cable 525 leading from the cable accommodating portion 526 to the inside of the connecting portion 300 is gripped by the gripping portion 306 of the connecting portion 300 (held in a gripped state). The gripping portion 306 is provided inside the winding portion 304 forming an annular space integral with the cable housing portion 526 and rotates as a part of the rotating portion 601 . As a result, the gripping portion 306 acts to move the midpoint of the USB cable 525 circularly. The end of the USB cable 525 fixed to the grip portion 306 is connected to the third connector 340 provided on the end surface of the connecting portion 300 through the wiring path 324 leading forward from the winding portion 304 . . Details of the cable housing portion 526, the gripping portion 306 and the wrapping portion 304 are described below in connection with FIGS.

A USB cable 445 connected to a fourth connector 440 that joins with the third connector 340 is connected to an imaging unit 446 , a coaxial epi-illumination 454 and a ring illumination 456 through a wiring path 425 .

(optical parts)
The functional unit 400 has an imaging unit 446 and a lens 448 as optical components. The imaging unit 446 includes an image sensor (eg, CMOS) that visualizes the received light. Lens 448 is, for example, a telecentric lens. A lens cover 450 is attached to the tip of the functional portion 400 with a bolt 452 . The functional unit 400 is further provided with a coaxial epi-illumination 454 and a ring illumination 456 . Either or both of the coaxial epi-illumination 454 and the ring illumination 456 emit light during imaging. The imaging unit 446, coaxial epi-illumination 454 and ring illumination 456 are powered by USB power. As described above, an example of the functional unit 400 is an imaging unit including an imaging device (CMOS) and a lens, which is a so-called camera.

As described above, in this embodiment, the electric circuit board 544 is provided inside the fixed portion 500 instead of inside the functional portion 400 . Therefore, the functional unit 400 can be miniaturized.

FIG. 5 is a cross-sectional view of the cable housing portion 526 and the winding portion 304 at a rotation angle of 0 degrees. FIG. 5 shows a cross section of the cable accommodating portion 526 and the winding portion 304 as seen from the main shaft 100 side.

(Cable housing portion 526)
As described above, the cable accommodating portion 526 forms an annular space around the rotation axis of the rotating portion 601 at the boundary between the fixed portion 500 and the rotating portion 601 . The cable accommodating portion 526 accommodates the USB cable 525 wound multiple times (five times in this example). The space of the cable accommodating portion 526 provided in the fixed portion 500 has a width sufficient to accommodate the USB cable 525 about ten turns. In other words, the plurality of turns of the USB cable 525 are provided with extra space.

(Winding portion 304)
The winding portion 304 provided in the connecting portion 300 forms an annular space that is not separated from the space of the cable accommodating portion 526 . The space of the winding portion 304 can accommodate the USB cable 525 for one turn. A gripping portion 306 provided on the winding portion 304 grips a midpoint of the USB cable 525 . Cable housing portion 526 does not rotate, but winding portion 304 rotates as part of rotating portion 601 . Therefore, when the rotating portion 601 and the functional portion 400 rotate 360 degrees, the gripping portion 306 makes a full circle.

(Shape of USB cable 525)
The shape of the USB cable 525 will be described along the flow from the wiring path 527 side of the fixing portion 500 to the wiring path 324 side of the connecting portion 300 . The USB cable 525 coming in from the wiring path 527 goes around the inside of the cable accommodating portion 526 five times from the outside to the inside of the space. The USB cable 525 can be bent in the cable accommodating portion 526 with sufficient margin. A portion that has been moved into the winding portion 304 after making five turns is gripped by the gripping portion 306 . The other end changes direction, passes through the wiring path 324 , and is connected to the third connector 340 .

(rotation angle 0 degrees)
As shown in FIG. 5, it is assumed that the rotation angle is 0 degree when the gripping portion 306 is closest to the entrance from the wiring path 527 . When the rotation angle is 0 degrees, the USB cable 525 inside the cable housing portion 526 is located on the outer side, and the USB cable 525 is not wound inside the winding portion 304 .

(counterclockwise rotation)
It is assumed that the rotational angle increases as the rotating portion 601 and the functional portion 400 rotate counterclockwise when viewed from the spindle 100 side. As the rotation angle increases, the gripping portion 306 rotates counterclockwise and pulls the USB cable 525 inside the cable housing portion 526 inward. Then, the pulled USB cable 525 is wound around the winding portion 304 . Since the USB cable 525 in the cable accommodating portion 526 is correspondingly shortened, it is drawn inward as a whole.

(rotation angle 180 degrees)
Although not shown, when the rotation angle reaches 180 degrees, the gripping part 306 moves to the right, which is opposite to the case of 0 degrees. Therefore, the USB cable 525 is wound around the gripping portion 306 by a half turn. At this time, the third connector 340, the fourth connector 440, the wiring path 425 and the USB cable 445 shown in FIG. 4 move to the right side in FIG.

(rotation angle 360 degrees)
FIG. 6 is a cross-sectional view of the cable housing portion 526 and the winding portion 304 at a rotation angle of 360 degrees.
When the rotation angle reaches 360 degrees, the third connector 340, the fourth connector 440, the wiring path 425 and the USB cable 445 return to the original left side as in FIG. At this time, the USB cable 525 is wound around the winding portion 304 once. In addition, the USB cable 525 inside the cable accommodating portion 526 is moved inward. Since the USB cable 525 is loosely wound, no excessive tension is applied to any part of the USB cable 525 even when the rotating part 601 rotates.

(clockwise rotation)
When the rotating portion 601 and the functional portion 400 are rotated clockwise as viewed from the main shaft 100 side and the rotation angle is decreased, the gripping portion 306 rotates clockwise to insert the USB cable 525 into the cable housing portion 526. push in. Therefore, the portion wound around the winding portion 304 is shortened, and the portion accommodated in the cable accommodating portion 526 is correspondingly lengthened. As a result, the USB cable 525 inside the cable housing portion 526 is pushed outward as before. In this way, even when the rotating portion 601 and the functional portion 400 are rotated clockwise (as viewed from the spindle 100 side), the USB cable 525 is not subjected to excessive load.

(Function of Cable Accommodating Portion 526)
As shown in FIG. 5, the cable accommodating portion 526 has a gap in the USB cable 525 that is wound a plurality of turns. Therefore, as shown in FIG. The shape of the separated USB cable 525 can be changed. Therefore, it is possible to rotate the rotating portion 601 and the functional portion 400 within a range of 0 degrees to 360 degrees without applying excessive force to the USB cable 525 . Note that even if the rotating portion 601 and the functional portion 400 rotate, the USB cable 525 in the wiring path 527, the USB cable 525 in the wiring path 324, and the USB cable 445 in the wiring path 425 do not change their shapes. Only the portion of the USB cable 525 included in the cable housing portion 526 and the winding portion 304 changes its shape as it rotates.

FIG. 7 is a configuration diagram of an electric circuit included in the spindle 100 and the machine tool device 600. As shown in FIG.
(Ethernet wiring (transmission line))
As mentioned above, spindle 100 is a PSE and has PSE module 760 . The PSE module 760 is an electric circuit for realizing the PSE power supply function and communication function. The machine tool device 600 is a PD and has a PD module 560 . The PD module 560 is an electric circuit for realizing the power receiving function and communication function of the PD. The PSE module 760 and PD module 560 are connected by the above wiring (Ethernet cable 122, first connector 120, second connector 520 and Ethernet cable 521). and power supply from the PSE module 760 to the PD module 560. The number of transmission lines of each Ethernet cable and the number of pins of each connector are the same. However, the number may be 9 or more, or 7 or less.According to the Ethernet communication and PoE standards, the number may be 4 or more.In addition, in FIG. , and only two communication lines indicated by thin lines are drawn, but as an implementation, more transmission lines are provided.

(PSE module 760)
PSE module 760 comprises communication circuitry 762 and power supply circuitry 764 . The communication circuit 762 mainly controls communication according to the Ethernet communication standard. The communication circuit 762 is connected to an external device 703 (for example, an information processing device such as a computer) via a communication line. The power supply circuit 764 mainly controls power supply according to the PoE standard. The power supply circuit 764 is connected to the external power supply 701 via a power supply line (power line).

(PD module 560)
PD module 560 includes communication circuitry 562 and power receiving circuitry 564 . The communication circuit 562 mainly controls communication according to the Ethernet communication standard. The power receiving circuit 564 controls power reception mainly in accordance with the PoE standard. The PD module 560 is provided on the electric circuit board 544 of the fixed part 500 .

(Electric circuit board 544)
The electric circuit board 544 is provided with a power supply circuit 580 and a main circuit 570 in addition to the PD module 560 . The power supply circuit 580 converts the power supply voltage obtained by PoE into a power supply voltage for the main circuit 570 and supplies the power supply voltage to the main circuit 570 . Furthermore, the power supply circuit 580 converts the power supply voltage obtained by PoE into a USB power supply voltage, and outputs it to the power supply line of the USB cable 525 . In this manner, since the power supply circuit 580 can separately supply power to the main circuit 570 and the imaging unit 446, various applications can be started up when the main circuit is started up, and the imaging unit 446 itself can be powered. Start-up can be done separately. The main circuit 570 includes a CPU 572 and a memory 574, and performs control processing for realizing the functions of the functional unit 400 (for example, photographing of a work according to remote control). A main circuit 570 (an example of an electric circuit) is connected to the functional section 400 via a communication path formed by the USB cable 525 and the third connector 340 . In this embodiment, with such a configuration, for example, while the imaging-related application is being processed on the main circuit side, the imaging unit itself can be started up. It becomes possible to take an image only by sending it to the imaging unit. In the past, a signal for instructing the activation of the imaging unit was sent from an imaging-related application, which tended to take a long time until imaging. can do.

(power flow)
When machine tool device 600 is attached to spindle 100, PSE module 760 of spindle 100 detects PD module 560 of machine tool device 600, and PSE module 760 and PD module 560 perform predetermined initialization operations. After that, power supply from the PSE module 760 to the PD module 560 is started. The power supply circuit 764 of the PSE module 760 obtains power from the external power supply 701 and outputs DC power according to the PoE standard through the above wiring (transmission path). The PD module 560 receives the DC power through the wiring. The power supply circuit 580 receives DC power from the power receiving circuit 564 and distributes the DC power to the main circuit 570, the imaging unit 446, the coaxial epi-illumination 454, and the ring illumination 456, respectively. That is, the power supply circuit 580 supplies necessary power to each internal module included in the functional unit 400 . In this way, the functional unit 400 receives power through the Ethernet cable 521 (including the feeder line) arranged on the fixed unit 500 and the USB cable 525 (including the feeder line) arranged between the fixed unit 500 and the connecting unit 300 . receive supply.

(Communication flow)
The machine tool device 600 receives an image pickup instruction signal from the external device 703 and sends image data picked up in response to the signal to the external device 703 . Specifically, the communication circuit 762 of the PSE module 760 transmits the imaging instruction signal received from the external device 703 to the PD module 560 using the wiring (transmission path) described above. When the communication circuit 562 of the PD module 560 receives the imaging instruction signal, it transfers the imaging instruction signal to the CPU 572 of the main circuit 570 . The main circuit 570 controls the imaging unit 446, the coaxial epi-illumination 454, and the ring illumination 456 of the functional unit 400 via USB according to the imaging instruction from the external device 703 to perform imaging and illumination (example of functions). , obtain image data from the imaging unit 446 . The operation of the main circuit 570 is realized by the CPU 572 sequentially executing programs stored in the memory 574 . The main circuit 570 causes the image data to be transmitted from the PD module 560 to the external device 703 . At this time, the communication circuit 562 of the PD module 560 transmits the image data to the PSE module 760 using the wiring described above. A communication circuit 762 of the PSE module 760 receives the image data and transmits it to the external device 703 .

As described above, the main circuit 570 (an example of an electric circuit) provided in the fixed part 500 can exchange data with the outside (for example, the external device 703). A fixed portion 500 of a machine tool device 600 having a main circuit 570 (an example of an electric circuit) capable of exchanging data with the outside (for example, an external device 703) is fixedly attached to the spindle 100 (see FIG. 2).

Further, the functional unit 400 is connected to a main circuit 570 (an example of an electric circuit), and is controlled by an application stored in the memory of the main circuit 570 (an example of an electric circuit) to perform functions such as imaging and illumination. be.

FIG. 8 is a diagram showing a replaceable functional unit 400. As shown in FIG.
The functional unit 400a is an imaging device having a lens 448a having a length La and a maximum diameter Da. The length of the main body 403a is represented by L1, and the diameter of the main body 403a is represented by D1. The functional part 400a can be separated from the rotating part 601 by removing the bolt 402 (see FIG. 3). And it is replaceable with the function part 400b. Functional portion 400 b can be fixed to rotating portion 601 with bolts 402 . Alternatively, the functional portion 400b may be fixed to the rotating portion 601 by a fitting mechanism of a mechanical mechanism. In this way, different functional units 400 can be exchanged.

The functional unit 400b is an imaging device having a lens 448b with a length Lb and a maximum diameter Db, the length of the main body 403b is represented by L2, and the diameter of the main body 403b is represented by D2. The lens 448b has a shorter length (Lb<La) and a smaller maximum diameter (Db<Da) than the lens 448a. Further, the functional portion 400b has a main body portion 403b shorter in length (L2<L1) and smaller in diameter (D2<D1) than the functional portion 400a. In this way, the rotating part 601 can be attached and detached by exchanging a plurality of types of functional parts 400 having different outer diameters.

FIG. 9 is an external view of the machine tool.
The machine tool has an openable and closable door on the front. This figure shows the door open. A machine tool includes an operation panel. An external device 703 (for example, an information processing device such as a computer) is connected to the machine tool. The form of connection is an example. The machine tool may include an information processing function equivalent to that of the external device 703 .

The worker can select an operation to image the workpiece with the imaging device during processing. When this operation is selected, an application related to imaging can perform image processing for extracting feature points such as edges and surfaces of workpieces from the captured image. For example, until now, it has been difficult for the machine tool shown in FIG. 9 to capture an image of the workpiece with the door closed. Therefore, it is necessary for the operator to take an image while confirming the position of the work with the door open. In this embodiment, machining can be temporarily stopped with the door of the machine tool closed, and the image of the workpiece can be captured by the imaging device without opening the door. As a result, the work can be performed without opening the processing chamber, so that the worker can work safely. Furthermore, after the image is captured, the tool correction value can be corrected on the operation panel without opening the door, and machining can be resumed. Moreover, it is possible not only to correct the correction value of the tool on the operation panel, but also to change the rotational speed of the tool.

According to this embodiment, image processing can be performed by the machine tool device, so the state of the workpiece can be confirmed even in an enclosed space with the door of the machine tool closed. Of course, it is possible to detect not only the state of the work, but also the diameter of the work, the diameter of the hole in the work, and the like. Apart from this, you can also check the position of the table and the injection position of the coolant.

[Modification 1]
In the embodiment, the third connector 340 connected to the USB cable 525 on the extension part 508 side and the fourth connector 440 connected to the USB cable 445 on the functional part 400 side are connected to perform power supply and communication. . Modification 1 shows an example in which power supply and communication are performed in a non-contact manner.

FIG. 10 is a cross-sectional view of the inside of the machine tool device 600 in Modification 1. As shown in FIG.
A power supply communication unit 590 is provided near the surface of the support unit 502 near the functional unit 400 . Power supply communication unit 590 includes a power supply unit that performs contactless power supply. The power feeding portion of the power feeding communication portion 590 is connected to a power feeding line included in a cable 592 connected to the electric circuit board 544 .

A power receiving communication unit 490 is provided near the surface near the support unit 502 in the function unit 400 . The power receiving communication unit 490 has a ring shape. The functional unit 400 has a disc-shaped projecting portion at a position close to the supporting portion 502, and the power receiving/communicating unit 490 is installed inside the projecting portion. Communication of the power receiving communication unit 490 coincides with the rotating shaft of the rotating unit 601 . Power reception communication unit 490 includes a power reception unit that receives power in a non-contact manner. A power receiving unit of the power receiving communication unit 490 is connected to a power supply line included in a cable 492 connected to the imaging unit 446 , the coaxial epi-illumination 454 and the ring illumination 456 .

When the machine tool device 600 is attached to the spindle 100, the power supply unit of the power supply communication unit 590 and the power reception unit of the power reception communication unit 490 approach each other. When the power supply unit of the power supply communication unit 590 and the power reception unit of the power reception communication unit 490 approach each other, the power supply unit of the power supply communication unit 590 supplies power to the power reception unit of the power reception communication unit 490 in a non-contact manner. Non-contact power supply is, for example, electromagnetic induction power supply.

The imaging unit 446 , the coaxial epi-illumination 454 and the ring illumination 456 are operated by the power received by the power receiving unit of the power receiving communication unit 490 . Since the power receiving/communicating section 490 is ring-shaped, power can always be supplied regardless of the orientation of the rotating section 601 .

Also, the power supply communication unit 590 includes a communication unit that performs contactless communication. A communication section of the power supply communication section 590 is connected to a communication line included in the cable 592 . Power receiving communication unit 490 includes a communication unit that performs contactless communication. The communication section of power receiving communication section 490 is connected to a communication line included in cable 492 .

When the machine tool device 600 is attached to the spindle 100, the communication section of the power supply communication section 590 and the communication section of the power reception communication section 490 come closer. When the communication unit of the power supply communication unit 590 and the communication unit of the power reception communication unit 490 approach each other, two-way communication by a non-contact method becomes possible. Non-contact two-way communication is, for example, millimeter wave wireless communication.

The electric circuit board 546 is connected to the imaging unit 446, the coaxial epi-illumination 454, and the ring illumination 456 via a communication path including the cable 592, the communication unit of the power supply communication unit 590, the communication unit of the power reception communication unit 490, and the cable 492. . This communication path allows the electrical circuit board 544 to communicate bi-directionally with the imaging unit 446 , the coaxial epi-illumination 454 and the ring illumination 456 . Since the power receiving/communicating section 490 is ring-shaped, two-way communication is always possible regardless of the orientation of the rotating section 601 .

Although an example of two-way communication has been shown, one-way communication may be performed from the electric circuit board 546 toward the imaging unit 446, the coaxial epi-illumination 454, or the ring illumination 456. One-way communication may also be provided from imaging unit 446 , coaxial epi-illumination 454 or ring illumination 456 toward electrical circuit board 546 . Note that the

cables

592 and 492 may be USB cables as in the embodiment.

[Modification 2]
The machine tool device 600 may be composed of the rotating portion 601 and the functional portion 400 without providing the fixed portion 500 . In that configuration, the entire machine tool apparatus 600 rotates with the rotating member 106 . For example, a battery may be installed in the machine tool device 600 and used as a power source. Alternatively, communication may be performed using a wireless medium such as a wireless LAN.

[Other Modifications]
FIG. 11 is a wiring diagram between the electric circuit board 544 and the imaging unit 446. As shown in FIG.
I will supplement the USB wiring. The electric circuit board 544 and the imaging unit 446 are connected by the USB cable 525, the third connector 340, the fourth connector 440 and the USB cable 445 as shown in FIG. The

USB cables

445 and 525 include VBUS and GND feed lines (power lines) and D- and D+ signal lines. A VBUS power supply line (power line) connects the power supply circuit 580 and the imaging unit 446 . A GND feeder line (power line) is grounded. Signal lines D− and D+ connect the CPU 572 and the imaging unit 446 . The third connector 340 and the fourth connector 440 have a VBUS terminal, a GND terminal, a D- terminal and a D+ terminal. A similar USB connector may be provided at the other end of the USB cable 445,525. Imaging unit 446 may include a USB connector that can be coupled with the USB connector of USB cable 445 . The electrical circuit board 544 may also include a USB connector that can mate with the USB connector of the USB cable 525 .

The power line 591a (first feed line) is a wire for supplying power from the power supply circuit 580 to the CPU 572 (main circuit 570). A power line 591 b (second feeder line) is a wire for supplying power from the power supply circuit 580 to the imaging unit 446 . The power line 591b may pass through a switch IC that controls ON/OFF of energization in accordance with a control signal sent from the CPU 572 .

The power supply circuit 580 that receives power from the external power supply 701 sends power to the CPU 572 via the power line 591a. When the CPU 572 receives power from the power supply circuit 580, it performs an OS (operating system) startup process. In addition, the power supply circuit 580 supplies power to the imaging unit 446 through the power line 591b in parallel with the OS startup process. When the imaging unit 446 receives power from the power supply circuit 580, the imaging unit 446 starts activation operation. When the OS startup process and the imaging unit 446 startup operation are completed, the imaging unit 446 receives instructions from applications operating on the OS via the D− and D+ communication lines.

In this way, a plurality of systems of power lines such as the

power lines

591a and 591b are provided, and power is supplied from the power supply circuit 580 to the CPU 572 via the power line 591a, and similarly from the power supply circuit 580 via another power line 591b to the imaging unit. 446 power. Since a plurality of systems of power lines such as the

power lines

591a and 591b are provided, the imaging unit 446 can be activated regardless of the OS activation. In other words, the power supply circuit 580 supplies power to the CPU 572 from the power line 591a, and the power supply circuit 580 also supplies power to the imaging unit 446 through the power line 591b. can start the start-up operation at the stage of receiving power supply. With this configuration, the imaging unit 446 can be activated even after the OS has been activated by the CPU 572 or even during the OS activation. As a result, it is possible to shorten the time required for system startup.

In the embodiment, as an example of the functional unit 400, an imaging unit having an image sensor (image sensor) such as CMOS, a lens, an illumination device, etc. is shown, but the functional unit 400 is not limited to this example. The imaging unit that is the functional unit 400 may be an imaging unit for measurement (measurement probe) or an imaging unit for observation. Also, the functional unit 400 may be a laser scanner unit, a laser generator, an angle head, or the like. Furthermore, functional part 400 may be a tool.

Wired communication may be performed by methods other than Ethernet and USB. Wired power supply may be performed by a method other than PoE or USB. Alternatively, wireless power supply or a battery may be used as power means, and only communication may be performed by wire. Alternatively, a wireless medium such as Wi-Fi may be used as communication means, and only power may be supplied by wire.

Since the machine tool device 600 is connected to the machine tool by wire, power supply from the outside (for example, 10 W or more) and stable high-speed communication with the outside (from 100 Mbps) are possible. As a result, the machine tool device 600 can be used without interruption of communication or delay.

Especially in the case of image probes for measurement, more lenses are used than image probes for observation, and the image probe tends to be longer. Moreover, since it is an image probe for measurement, it is preferable to set the lens system so that the imaging area has the same size as the CMOS imaging area. In other words, it is necessary to design so as to suppress diffusion of light so as to be parallel to the optical axis as much as possible. Therefore, it is difficult to increase the imaging area. Therefore, when performing detailed measurement of a workpiece, there are cases in which a plurality of images of the workpiece at the measurement location are taken, and the plurality of images are analyzed to measure one workpiece.

In the embodiment, since the functional section 400 is detachable from the rotating section 601, a plurality of functional sections 400 can be replaced with one rotating section 601 for use. For example, the functional part 400X or the functional part 400Y can be attached to the rotating part 601A suitable for a certain machine tool A. Therefore, normally, the frequently used functional unit 400X is attached to the rotating unit 601A and used, and when the rarely used functional unit 400Y is used, the functional unit 400X is replaced with the functional unit 400Y. can be considered. Since one rotating part 601A can be reused, the cost burden on the user is lower than when the machine tool device 600 (function X device for machine tool A, function Y device for machine tool A) is provided for each type of function. few.

It is also possible to share one functional unit 400 between two machine tools. For example, in a case where the functional unit 400X is shared by machine tool A and machine tool B, a rotating unit 601A suitable for machine tool A and a rotating unit 601B suitable for machine tool B are prepared in addition to functional unit 400X. . When the functional part 400X is used in the machine tool A, the functional part 400X is attached to the rotating part 601A. On the contrary, when using the functional part 400X in the machine tool B, the functional part 400X is attached to the rotating part 601B. Since one functional unit 400X can be used, the cost burden on the user is less than when the machine tool device 600 (function X device for machine tool A, function X device for machine tool B) is prepared for each machine tool. .

It also improves maintainability. For example, when the durability of the rotating portion 601 is high and the durability of the functional portion 400 is low, two functional portions 400 are prepared for one rotating portion 601 . Then, if the function part 400 is replaced with the other function part 400 when the function part 400 is inspected, the machine tool device 600 can be used continuously. In addition, it is cheaper than preparing two machine tool devices 600 .

In addition, since parts can be standardized, the burden on the manufacturing site is reduced. For example, the rotating part 601A suitable for the machine tool A and the rotating part 601B suitable for the machine tool B are kept as inventories, and the functional parts 400X and 400Y are also kept as inventories. Then, when an order is received for a device of function X for machine tool A, the function part 400X is attached to the rotating part 601A and shipped. Also, when receiving an order for a device of function Y for machine tool B, the functional unit 400Y is attached to the rotating unit 601B and shipped. In addition, a device with function Y for machine tool A and a device with function X for machine tool B can also be used. In this way, for example, it is possible to flexibly cope with high-mix low-volume production.

The combination of the functional units 400 to be exchanged is arbitrary. In addition to replacing with a different functional unit 400, the same functional unit 400 may be replaced as in the example of maintenance. As an example of exchanging with a different functional unit 400, the imaging unit for measurement and the imaging unit for observation may be exchanged. An imaging unit for one measurement may be replaced with an imaging unit for a different type of measurement. One viewing imager may be exchanged for a different type of viewing imager. The imaging unit may be replaced with a functional unit 400 other than the imaging unit. The functional units 400 other than the imaging unit may be exchanged.

In addition, in the embodiment, since the cable accommodating portion is provided to accommodate the USB cable wound multiple times with a gap so that the shape of the USB cable can be changed according to the rotation angle of the rotating portion 601, the USB cable is prevented from being damaged. function 400 can be rotated without giving

The machine tool device 600 may have a battery. The battery is provided, for example, in functional section 400 or fixed section 500 . The imaging unit 446 may be activated using a battery as a power source.

12 is a configuration diagram of an integrated circuit in the fixed part 500 and the functional part 400. FIG. In this example, one integrated circuit is included in the fixed portion 500 and two integrated circuits are included in the functional portion 400 .

The imaging unit 446 has an imaging device 800 (for example, CMOS), a first integrated circuit 811 and a second integrated circuit 820 .

The first integrated circuit 811 has a noise processing section 812 , a gain adjustment section 813 and an AD conversion section 816 . The first integrated circuit 811 is a circuit for performing noise processing on the signal from the imaging device 800 . A noise processing unit 812 removes noise included in the image obtained from the image sensor 800 . A gain adjustment unit 813 adjusts an amplification factor (gain) relating to current converted from light exposed by the imaging element 800 . The AD converter 816 converts the image data from analog to digital. The noise processing section 812, the gain adjustment section 813, and the AD conversion section 816 may use known techniques. The electrical signal processed by the noise processing section 812 , the gain adjustment section 813 and the AD conversion section 816 is passed to the second integrated circuit 820 . The first integrated circuit 811 may have functional units other than the noise processing unit 812 , the gain adjustment unit 813 and the AD conversion unit 816 .

The second integrated circuit 820 includes a first corrector 834 and a second corrector 836 . The first correction section 834 has a defect correction section 822, a shading correction section 824 and a white balance processing section 826, and the second correction section 836 has an interpolation processing section 828, a color correction processing section 830 and a contour processing section 832. . The defect corrector 822 corrects black defects and white defects in the image. The shading correction unit 824 corrects a phenomenon (shading) in which the signal output in the peripheral portion of the image is lowered. A white balance processing unit 826 corrects the spectral characteristics of the image sensor 800 to match human visibility. The defect corrector 822, the shading corrector 824, and the white balance processor 826 may use known techniques. The electrical signal processed by the defect correction section 822 , shading correction section 824 and white balance processing section 826 is passed to the interpolation processing section 828 .

The interpolation processing unit 828 generates RGB output data (bitmap data), which is a general video signal, from RGB Bayer array signals from the color filters of the image sensor 800 . The color correction processing unit 830 corrects the spectral characteristics of the color filters of the image sensor 800 to approximate ideal characteristics. The contour processing unit 832 performs processing for sharpening the contour of the subject. The interpolation processing unit 828, the color correction processing unit 830, and the contour processing unit 832 may use known techniques. The electrical signal processed by the second integrated circuit 820 is output from the imaging unit 446 and input to the main circuit 570 of the electrical circuit board 544 . The imaging element 800, the first integrated circuit 811 and the second integrated circuit 820 may be configured as an SoC (System on Chip). The second integrated circuit 820 may have functional units other than the defect correction unit 822 , the shading correction unit 824 , the white balance processing unit 826 , the interpolation processing unit 828 , the color correction processing unit 830 and the contour processing unit 832 .

The main circuit 570 may have a third integrated circuit that is not included in the imaging unit 446. The digital circuit shown in FIG. 12 is an example of the third integrated circuit. The third integrated circuit is a circuit for analyzing image data processed by the imaging unit 446 . Thus, the functional section 400 has a third integrated circuit that analyzes and processes image data separately from the general imaging unit 446 . Functions equivalent to the functional units of the illustrated digital circuit may be realized by executing a program stored in memory 574 (FIG. 7) with CPU 572 . Although the processing in the third integrated circuit is arbitrary, here, it is assumed that a plurality of images are instantaneously acquired by one shutter operation, and digital processing is performed using the plurality of images. For example, noise reduction processing can be performed by averaging a plurality of images continuously shot at different ISO sensitivities. Alternatively, processing for expanding the dynamic range can be performed using a plurality of consecutively shot images with different exposures. The dynamic range is the ratio of the maximum value to the minimum value of the signal that can be processed, and here means the range of brightness that the imaging device 800 can tolerate. In other words, the digital processing in the third integrated circuit makes it easier to see an image having a brightness difference wider than the range of brightness that the imaging device 800 originally allows.

An example of performing processing for expanding the dynamic range in the main circuit 570 will be described below. Specifically, overexposure or underexposure is canceled by partially superimposing two pieces of image data that have been shot in succession. The main circuit 570 has a first image memory 840 , a second image memory 842 , a difference analysis section 844 , a re-extraction section 846 and a superposition section 848 . The first image memory 840 stores basic first image data. The second image memory 842 stores second image data to be referred to. The second image data is, for example, image data acquired a moment before the first image data. The difference analysis unit 844 analyzes the difference (image movement) between the first image data and the second image data, and specifies an image area of the second image data to be superimposed on the first image data. A re-extraction unit 846 extracts a partial image to be superimposed on the first image data from the second image data. A superimposition unit 848 superimposes the partial image extracted from the second image data on the first image data. As a result, an image obtained with proper exposure in the second image data is superimposed on a portion (overexposure or underexposure portion) where the exposure was not proper in the first image data, and there is no problem in exposure as a whole. Images can be generated. Image data digitally processed by the main circuit 570 is transmitted from the communication circuit 562 .

This patent application claims priority from Japanese Patent Application No. 2021-158850 (filed on September 29, 2021), which is incorporated herein by reference in its entirety.

Claims

A machine tool device that is detachably mounted on a mounting portion of a machine tool and rotatable together with a rotating member in the mounting portion,
a rotating part that rotates with the rotation of the rotating member;
An electric circuit that can exchange data with the outside,
a functional part connected to the electric circuit, capable of executing a function controlled by the electric circuit, and rotating in the same direction as the rotation direction of the rotating part as the rotating part rotates;
The machine tool apparatus, wherein the functional section is detachable with respect to the rotating section.
further comprising a fixed portion that includes the electrical circuit and is fixedly attached to the non-rotating portion of the attachment portion;
the fixed portion surrounds the rotating portion and has a power supply line connected to the mounting portion;
2. The machine tool apparatus according to claim 1, wherein said functional section receives power supply via said power supply line.
The machine tool device according to claim 1, wherein the rotating part is detachable by exchanging the functional parts having different outer diameters.
The machine tool device according to claim 2, wherein the outer circumference of the functional section is located inside the outer circumference of the fixed section when viewed from the direction along the rotation axis of the rotating section.
A machine tool having a rotating member and a non-rotating portion, and including a mounting portion for detachably attaching a machine tool device and mounting a part of the machine tool device so as to be rotatable together with the rotating member,
Having a control unit for controlling movement of the mounting unit,
The attachment part is fixed to the non-rotating part and attaches a fixed part of the machine tool device having an electric circuit capable of exchanging data with the outside, and is capable of executing a function controlled by the electric circuit. A machine tool, wherein a rotating part of the machine tool device that rotates integrally the functional parts of the machine tool device is rotatably mounted together with the rotating member.