TW201914715A - Boring head with an electronic unit - Google Patents

Abstract

A boring head (1) with an electronic unit (20) integrated in the boring head (1) is provided, the electronic unit (20) comprising a control unit (60), a display (30) and a compartment (26) for a power source (41). The display (30) is connected to the control unit (60) and serves to display information concerning the status of the boring head (1) to a user. The compartment (26) serves to accommodate a power source (41) to supply the control unit (60) and the display (30) with electric power. The electronic unit (20) as a whole is designed as a compact subassembly of the boring head (1).

Description

 Boring head with electronic unit  

The invention relates to a boring head having an electronic unit and an electronic unit of the boring head. In particular, the invention relates to a boring head that holds a cutting insert, wherein the boring head is adapted to transfer rotational motion from a drive source in a machine tool to a cutting insert specifically designed for wafer forming metal cutting.

The boring head, for example for wafer forming metal cutting, typically includes a radially displaceable insert mount to permit radial adjustment of the cutting edge of the cutting insert. The radial displacement range of the cutting insert represents an important parameter of the boring head and is often indicated by the scale provided on the adjusting screw, which can be radially displaced by the adjusting screw.

In high precision tool knives and in order to provide a user with a better level of comfort, it is often necessary to use the display to numerically represent the radial displacement of the cutting insert, along with other possible status information of the boring head. For this purpose, in addition to or in lieu of a scaled adjustment screw, a display such as a liquid crystal display (LCD) can be provided.

In the world patent WO 2006/000746, the display is arranged on the adjustment tool for manually adjusting the position of the cutting edge. Therefore, the display is not directly placed on the boring head, but on a separate device.

A boring head with an integrated display to indicate the actual radial displacement of the cutting insert is disclosed in German Patent DE 10 2013 217 911 A1.

The arrangement of the display in the boring head creates a complex and expensive construction of the boring head, since not only the sensors used to measure the displacement of the insert holder have to be additionally provided, but also the control unit and some types of power supplies. Control the display and power to the display and control unit. All of these electronic components that together form an electronic unit must be positioned within the limited space of the boring head and must be inscribed with each other.

Moreover, due to the generally high rotational speed, most of the electronic components and wires used to connect these components are exposed to high centrifugal forces during the operation of the boring head. At one of the covers leading to these electronic components and wires, there is a high risk of intrusion of dirt particles and coolant. Thus, the arrangement of the electronic unit increases the risk of component failure in prior art boring heads.

It is an object of the present invention to provide a boring head having an electronic unit that has a simplified construction and reduces the risk of failure.

This purpose can be solved by the boring head of the first item of the patent application. Further embodiments of the boring head are provided in the dependent claims. The electronic unit of this boring head is stated in item 15 of the scope of patent application.

After the text, all indications of position and direction, such as up, down, inward and outward, are the axis of rotation defined by the general direction of rotation of the boring head in normal use (ie, when machining the workpiece). The radial direction of the vertical boring head. The front side of the component of the boring head generally refers to the side of the radially outwardly facing component and thus represents the component visible to the user. The rear side generally refers to the side of the radially inward facing element.

The invention provides a boring head having an electronic unit integrated in the boring head, the electronic unit comprising: a control unit, a display connected to the control unit, for displaying information related to the condition of the boring head to the user, and A compartment for powering the control unit and display.

The electronic unit is designed as a compact sub-assembly of the boring head.

The boring head is adapted to transfer rotational movement from the drive source (eg, the spindle of the machine tool) to the cutting insert for machining the workpiece. Cutting inserts are particularly suitable for wafer forming metal cutting. The boring head typically includes a body that is attachable to the electronic unit and preferably includes a stem and a head. The stem is preferably predominantly cylindrical, but may also have a conical or polygonal cross section. The head is preferably predominantly cylindrical. The stem is usually connected to the drive head, such as the spindle of the machine tool. The cutting insert is attached to the head for processing the workpiece and preferably also an electronic unit. The electronics unit forms an integrated component of the boring head and is typically fully disposed within the cutting insert, at least at the radially outermost edge of the cutting insert.

A compact subassembly that is set to be associated with an electronic unit means that the electronic unit represents a modular component that is clearly separated from the remainder of the boring head. Thus, the electronic unit as a whole is associated with other components of the boring head to form individual and clearly spaced structural components. Different components of the electronic unit, that is to say at least the control unit, the display and the compartment for the power supply, which are usually closely arranged and preferably extend all of the wires interconnecting the different components into the electronic unit without passing through the boring head other parts. Alternatively, the electronic unit can be detached from the boring head by only a few simple operations, ie, non-destructively, for example by loosening some screws, whereby the electronic unit is formed after being detached from the boring head. Compact one piece.

Due to the compact construction of the sub-assembly form, the electronic unit can be manufactured completely separated from the remainder of the boring head. Since all of the wires interconnecting the components of the electronic unit preferably extend within the electronic unit, the amount of wires present in the boring head can be substantially reduced. Advantageously, in order to further reduce the risk of failure, the electronic unit does not contain all of the wires, but only electrical connections in the form of contacts, printed circuits, and the like. Due to the compact construction of the electronic unit, the boring head can be selectively constructed to facilitate easy removal of the electronic unit from the body, for example for cleaning or replacement. Furthermore, an electronic unit with a compact construction can be ideally sealed with respect to dust particles and liquids. Therefore, the boring head also reduces the risk of failure.

Typically, the control unit is connected to certain types of sensors and servos for measuring the parameters of the boring head. The sensor can, but does not have to be, a component of an electronic unit. Preferably, the parameter is attached to the radial position of the cutting insert of the boring head. The control unit is preferably adapted to process the input data received from the sensor into an output signal as an input signal to the display to indicate an individual value. For this purpose, the control unit typically includes at least one analog-to-digital converter or serial communication port, such as a Universal Asynchronous Transceiver (UART), Serial Peripheral Interface (SPI), or Integrated Circuit Bus (I ² C). ). The display preferably comprises a liquid crystal display (LCD) or a DOT Matrix or TFT or E-Paper.

The power source is preferably represented by a general battery. In a preferred embodiment, the compartment is adapted to accommodate a button cell, which is particularly space efficient. In the cabin, individual contacts are typically provided to electrically connect the power source to the control unit and display.

Preferably, the electronic unit also includes at least one button operatively coupled to the control unit for the user to influence the control unit. Advantageously, it is designed as a button, which is preferably used to switch the electronic unit on and off, in particular the display. The button can provide further information, such as, for example, a reset function, depending on, for example, its sequence of operations or duration.

If the compartment for the power supply is placed between the control unit and the button, a particularly space-saving configuration can be achieved.

A cover is usually provided to cover the compartment for the power supply. The cover member is preferably removably attached to the boring head, such as by screws, to facilitate convenient replacement of the power source if necessary. If the electronic unit also includes a button, the button is preferably formed by a cover member of the cabin. This design of the electronic unit is particularly space efficient.

The functional principle of the button is preferably based on a piezoelectric element. The piezoelectric element is suitable for detecting the operation of the button by the user. With the provision of a piezoelectric element, the minimum movement of the button is typically detected, even in the micrometer range. With this button, a particularly tight closure of the boring head can be achieved. The piezoelectric element is advantageously arranged between the compartment for the power supply and the cover forming the button.

Preferably, the piezoelectric element forms a piezoelectric diaphragm. In a preferred embodiment, the piezoelectric film is attached to the control unit by an anisotropic conductive paste. The electronic unit may also include a piezoelectric plate to which the piezoelectric film is attached by an anisotropic conductive paste. The anisotropic conductive paste is preferably a binder, such as a glue, which is itself non-conductive, but is provided with conductive particles embedded therein. When the two components attached to each other are pressed together (ie, the piezoelectric film and the piezoelectric plate), selectively under the influence of temperature (thermal compression), the anisotropic conductive paste disposed therebetween is compressed, so as to cause At least some of the conductive particles are in contact with the two components, or the bridge between the two components is formed from conductive particles. By using an anisotropic conductive paste to connect the piezoelectric diaphragm to the control unit, in particular a piezoelectric plate, a particularly stable and space-saving connection of the piezoelectric diaphragm can be achieved.

It should be noted that the principle of connecting the piezoelectric diaphragm to the control unit by means of an anisotropic conductive paste, or to the connecting element and in particular to the PCB, is basically also applicable to other boring heads. Individual boring heads suitable for use in the application of this principle typically have piezoelectric buttons, but do not necessarily include a display or a compact electronic unit. Therefore, the principle of connecting a piezoelectric film to a control unit or a connecting member by an anisotropic conductive paste represents another independent invention.

The piezoelectric plate can be in the form of a printed circuit board. Preferably, the piezoelectric plate is disposed between the chamber for the power source and the piezoelectric element.

In a preferred embodiment, the boring head includes a radially displaceable insert mount and a sensor for measuring the radial displacement of the insert mount. The sensor is preferably coupled to the control unit and the control unit is adapted to control the display such that the radial displacement of the insert mount is displayed by the display.

Advantageously, the electronic unit comprises a housing for operatively connected to the display of the control unit and to the compartment for the power supply, and preferably also to the button in or on the control unit. By providing this housing, a particularly compact electronic unit can be achieved which can be manufactured separately from the rest of the boring head. Thus, in this embodiment, the housing, together with the control unit, the display, the compartment for the power supply, and preferably the separate sub-assembly forming the boring head together with the button, for example, may be attached by only a few setscrews In the subject.

The control unit is preferably arranged as a printed circuit board (PCB). The PCB advantageously comprises a signal processing unit and/or a memory chip.

The PCB advantageously forms the side walls of the electronic unit. In particular, the rear side can be formed, that is, the rear side wall of the electronic unit.

In a preferred embodiment, the PCB together with the housing form an interior space of the electronic unit, the display and the compartment for the power supply being especially fully disposed in the interior space. The electronic components of the button (e.g., piezoelectric elements) are preferably also disposed in the interior space.

The electronic unit is preferably adapted to communicate wirelessly with an external device, such as a computer or a mobile phone. The electronic unit is especially suitable for wireless communication in accordance with the "Bluetooth Low Power" standard. In order to wirelessly transmit data from the control unit to the external device, the electronic unit preferably includes an antenna. Advantageously, the aperture of the housing of the electronic unit is used to transmit the antenna radiation to the outside. Therefore, the antenna is adapted to radiate electromagnetic waves through the aperture of the housing. The aperture is preferably a display window to allow the user to see the display. Advantageously, the antenna comprises a radio frequency (RF) ground plane integrated in the PCB and a conductive element formed by the housing of the electronic unit. The ground plane and the conductive elements form the two leg members of the antenna. The ground plane is advantageously arranged directly on the rear side of the display window. In an alternative, and also preferred embodiment, the integral antenna can be integrated into the PCB. In this example, the antenna is advantageously disposed directly on the rear side of the display window such that electromagnetic waves can be radiated from the antenna through the display window to the outside.

Preferably, the body comprises a recess, the pocket preferably being open to the radial direction. The electronic unit is advantageously arranged in this recess. The recess is preferably disposed in the head, particularly within the substantially cylindrical side wall of the head.

1‧‧‧搪刀头

2‧‧‧ Subject

3‧‧‧ pole

4‧‧‧ head

5‧‧‧ recess

6‧‧‧Inscribed

7‧‧‧ bolt

10‧‧‧Tools Vehicle

11‧‧‧Inlay holder

12‧‧‧Clamping screws

13‧‧‧Adjustment screw

14‧‧‧ cutting inserts

15‧‧‧Measurement area

16‧‧‧Sensor

20‧‧‧Electronic unit

21‧‧‧Electronic housing

22‧‧‧ screw holes

23‧‧‧ screw holes

24‧‧‧ fixing screws

25‧‧‧ display window

26‧‧‧Battery box (cabin)

27‧‧‧ screw holes

28‧‧‧Battery cover

30‧‧‧ display

31‧‧‧Display glass cover

32‧‧‧Isolation foil

33‧‧‧LCD display

34‧‧‧Rough connectors

40‧‧‧ Cover

41‧‧‧Battery

42‧‧‧ battery housing

43‧‧‧ Notch

44‧‧‧ Notch

45‧‧‧Upper battery seal

46‧‧‧Battery seals

47‧‧‧ screw holes

48‧‧‧ fixing screws

49‧‧‧ button

50‧‧‧Piezoelectric diaphragm

51‧‧‧Metal discs

52‧‧‧Ceramic substrate

53‧‧‧Piezoelectric plate

54‧‧‧ annular contact surface

55‧‧‧Central contact surface

56‧‧‧Contact surface

57‧‧‧Battery spacers

58‧‧‧Viscos

59‧‧‧Electrical particles

60‧‧‧Printed circuit board

61‧‧‧Contact elements

62‧‧‧Bottom battery contacts

63‧‧‧ side battery contacts

64‧‧‧Electronic components

65‧‧‧ fixing screws

66‧‧‧Antenna connection screw

67‧‧‧ Ground plane

68‧‧‧Main seals

69‧‧‧ Screw holes

70‧‧‧Antenna radiation

The preferred embodiments of the present invention are described with reference to the drawings, which are merely to illustrate the preferred embodiments of the invention, and not to limit the invention. FIG. 1 shows a boring head according to an embodiment of the present invention. 2 is a top view of the boring head of FIG. 1; FIG. 3 is a side view of the boring head of FIG. 1 , partially showing a central section; FIG. 4 is a front view of the electronic unit of the boring head of FIG. Figure 5 is a front perspective view of the electronic unit of the boring head of Figure 1 without a battery cover; Figure 6 is a rear perspective view of the electronic unit of the boring head of Figure 1 without a battery cover; Figure 7 is a view along Figure 4 Figure VIII shows a cross-sectional perspective view of the electronic unit of the boring head of Figure 1 without the battery cover; Figure 8 shows an exploded perspective view of the electronic unit of the boring head of Figure 1 without the battery cover; Figure 9 FIG. 10 is a front perspective view showing the battery cover of the electronic unit of the boring head of FIG. 1; FIG. 11 is a front view showing the battery unit of the electronic unit of the boring head of FIG. Cover rear perspective view; Figure 12 reveals the electronic unit of the boring head of Figure 1. A cross-sectional view of the cell cover; FIG. 13 discloses an enlarged view of the area indicated by the dashed line in FIG. 12 during production before the battery cover is pressed; FIG. 14 discloses the area indicated by the dashed line in FIG. 12 during production after the battery cover is pressed. Figure 15 is a front perspective exploded view of the battery cover of the electronic unit of the boring head of Figure 1; Figure 16 is a rear perspective exploded view of the battery cover of the electronic unit of the boring head of Figure 1; A perspective view of the boring head of FIG. 1 when the data is transmitted wirelessly through the integrated antenna; and FIG. 18 is a plan view showing the front side of the printed circuit board (PCB) of the electronic unit of the boring head of FIG.

A preferred embodiment of the boring head 1 of the present invention or one or more components thereof is disclosed in Figures 1-18.

As shown in Fig. 1, the boring head 1 comprises a body 2 which is integrally formed as a single piece. The body 2 includes a generally cylindrical stem portion 3 and a substantially cylindrical head portion 4. The diameter of the rod portion 3 is smaller than that of the head portion 4 for connecting the boring head 1 to a driving source such as the main shaft of the machine tool. When the boring head 1 is operated, a drive source (not shown) performs a rotary motion of the boring head 1. For this purpose, the stem 3 is attached to the drive source in a torque-resistant manner so that the boring head 1 can transfer the rotational drive of the drive source to the cutting insert 14 suitable for wafer-forming metal cutting, ie, directly On a work piece to be processed.

In order to fix the boring head 1 to a drive source of a boring machine or a milling machine in an anti-torque manner, a bolt 7 is displaceably arranged in the shank 3. The bolt 7 extends transversely (i.e., radially) through the stem portion 3.

Since the stem portion 3 and the head portion 4 are substantially cylindrical, a central longitudinal axis and a radial direction of the boring head 1 are defined. In normal use, the central longitudinal axis coincides with the axis of rotation of the boring head 1.

The head 4 of the boring head 1 includes a transverse (i.e., radial) channel extending through the head 4 in diameter. A tool carrier 10 in the form of a plunger is disposed in the channel (see Figure 3). An insert mount 11 is attached to the first end face of the tool carrier 10 outside the channel. The insert holder 11 is attached to the tool carrier 10 by a clamping screw 12. The insert holder 11 holds a cutting insert 14, and the cutting insert has a cutting edge suitable for wafer forming metal cutting directly on a workpiece. Along the radial direction, the cutting edge of the cutting insert 14 represents the outermost component of the boring head 1.

Attached to the second end face of the tool carrier 10 is an adjustment screw 13 by which the tool carrier 10 can be displaced in the radial direction. The adjusting screw 13 has a hexagonal socket, and the adjusting screw 13 can be rotated by a corresponding hexagonal wrench. When the adjustment screw 13 is rotated, the tool carrier 10 is displaced in the radial direction. The scale can be selectively printed on the adjustment screw 13 to indicate the approximate displacement of the tool carrier 10 by the user.

An inscription 6 is provided on the head 4 to provide user specific information, such as information regarding different cutting inserts 14 and/or insert holders 11 that can be used in combination with the boring head 1.

A pocket 5 is provided on one side of the head 4 which is oriented in a vertical direction relative to the longitudinal extension of the tool carrier 10. The pocket 5 defines an interior space in which the head 4 is cuboidal and opens outward. The internal space of the recess 5 is for accommodating an electronic unit 20.

The electronics unit 20 is used to calculate the actual radial displacement of the tool carrier 10 and to indicate a corresponding displacement value on a display 30 to the user. For this purpose, the electronic unit 20 includes a battery compartment 26 for a general battery 41, a display 30, a button 49, and a printed circuit board (PCB) 60. All of these electronic components of the electronic unit 20 are interconnected internally to each other such that the battery 41 can supply power to the PCB 60 and the display 30, and the user can influence the signal processing of the PCB 60 and the indication on the display 30 by pressing the button 49. . The entire electronic unit 20 is integrated into the head 4 of the boring head 1.

To measure the actual radial displacement of the tool carrier 10, a measurement zone 15 is placed on the tool carrier 10, as shown in FIG. The measurement zone 15 is disposed adjacent to a stationary sensor 16 that is adapted to measure the radial displacement of the measurement zone 15 relative to the sensor 16. The sensor 16 can be, for example, a hall-sensor or an anisotropic magnetoresistance and the measurement zone 15 is a permanent magnet.

The sensor 16 is electrically coupled to the PCB 60 of the electronic unit 20 such that a signal of the actual displacement of the reflective tool carrier 10 can be transferred to the PCB 60. The PCB 60 includes contact elements or surfaces disposed on the back side thereof for contacting individual contact elements that are coupled to the sensor 16.

As can be seen from Figures 4 to 7, the electronic unit 20 has a substantially cubic outer shape that fits into the recess 5 of the head 4. The outer shape of the electronic unit 20 is mainly defined by an electronic housing 21 which is integrally made of a single piece of metal. The electronic housing 21 has an internal space in which the display 30 and the battery case 26 are completely disposed. This internal space is separated by an electronic housing 21 and a PCB 60 which forms the rear side of the electronic unit 20. Therefore, as a whole, the electronic unit 20 has a compact configuration.

The electronic housing 21 forms a substantially rectangular transverse frame in the peripheral direction which separates the electronic unit 20 and its electronic components in a lateral direction with respect to the side walls of the recess 5. The internal space of the electronic housing 21 is divided into two compartments, a first compartment for accommodating the display 30 and a second compartment for accommodating the battery 41. The two compartments of the interior space are omnidirectionally separated by the electronic housing 21 in the lateral direction and separated by the PCB 60 on the rear side. Approaching the front side, the first compartment of the interior space is separated by a transparent display glass cover 31 which is embedded in a rectangular display window 25 formed by the electronic housing 21 (see Figures 4 and 7). The second compartment of the interior space is separated from the front side by a removable battery cover 28 (see FIG. 3) such that the battery compartment 26 is disposed between the battery cover 28 and the PCB 60.

In order to attach the electronic unit 20 to the head 4 of the boring head 1, a screw hole 22 is provided at each corner of the electronic housing 21, as can be seen from Figs. The PCB 60 includes corresponding cuts provided at each of its corners (see Figure 6). In order to mount the electronic unit 20 on the main body 2 of the boring head 1, a fixing screw 24 (see Fig. 1) is guided through the screw hole 22 and screwed into individual screw holes correspondingly provided for the purpose of the main body 2. Therefore, the electronic unit 20 forms a compact sub-assembly of the boring head 1 which can be completely separated from the remainder of the boring head 1. After being fabricated, the electronic unit 20 as a whole can be easily screwed to the main body 2 by the fixing screws 24.

In order to achieve an overall flat front surface of the assembled electronic unit 20, the electronic housing 21 includes a recess disposed in the front surface thereof and in the region of the battery case 26 for receiving the battery cover 28. The recess is sized to be completely filled in the lateral direction by the battery cover 28 and the front surface of the battery cover 28 is flush with the adjacent front surface of the electronic housing 21. The screw hole 23 is disposed on the electronic unit 20 for fixing the battery cover 28 to the electronic housing 21 by the fixing screw 48.

The configuration of display 30 can be seen in FIG. 8 and includes a display glass cover 31, an isolation foil 32, a liquid crystal display (LCD) 33, and two thick strip connectors 34.

The display glass cover 31 is disposed in the display window 25 of the electronic housing 21 and serves to protect the LCD 33 from external mechanical influences, dust particles, and moisture. The spacer foil is disposed between the display glass cover 31 and the LCD 33.

The LCD 33 is used to indicate the user's radial displacement with respect to the tool carrier 10 and the cutting insert 14. For this purpose, the LCD 33 is electrically connected to the array of connector surfaces provided on the PCB 60 by the thick strip connectors 34. The thick strip connector 34 serves as a spacer for positioning the LCD 33 close to the display glass cover 31 and the display window 25.

A plurality of electronic components 64 are disposed on the PCB 60 forming one of the control units of the electronic unit 20, the electronic components being interconnected by corresponding conductor tracks. The electronic component 64 of the PCB 60 typically includes an analog-to-digital converter for converting the input signal received from the sensor 16 into digital data, and a signal processing unit for processing the digital data and providing a corresponding input signal to LCD 33. The PCB 60 also includes a memory chip for storing the measured displacement data. The electronic component 64 is preferably disposed on the rear side of the PCB 60.

The contacts 62, 63 are disposed on the front side of the PCB 60 for contacting the battery 41 - the bottom battery contact 62 for contacting the first electrode of the battery 41 and the side battery contact 63 for contacting the second electrode of the battery 41, the battery In this article, the button battery, especially the CR 1025 lithium battery.

Further contacts 61 are provided on the front side of the PCB 60 for contacting the button 49. Since the button 49 is integrated in the removable battery cover 28 (described in detail later), the contact member 61 is constructed as a spring contact.

In order to fix the PCB 60 to the electronic housing 21 by means of three fixing screws 65 and an antenna connecting screw 66 (described later in detail), the PCB includes screw holes 69 corresponding to the screw holes 27 provided on the rear side of the electronic housing 21. . A main seal 68 is disposed between the electronic housing 21 and the PCB 60 to protect the inside of the electronic unit 20 from the inside of the boring head 1 from dust and moisture.

The second compartment of the interior space of the electronic unit 20 includes a battery compartment 26 for housing the battery 41. As can be seen from Figures 7 and 8, a battery housing 42 is disposed within the second compartment. The battery case 42 is made of a non-conductive material, such as plastic, and separates the battery case 26 in the lateral direction and at least partially toward the rear side thereof. The battery seal 46 is disposed to seal the battery case 42 to the PCB 60 and the electronic housing 21, and an upper battery seal 45 is provided to seal the battery case 42 to the battery cover 28 and the battery case 42.

The battery case 42 includes an opening provided on the rear side thereof such that the bottom battery contact 62 and the side battery contact 63 can protrude into the battery case 26 for contacting the battery 41.

The construction of the battery cover 28, which also forms a button 49, is disclosed in Figures 9 and 16. The battery cover 28 includes a cover 40 which is integrally formed as a single piece and made of metal. The cover 40 has a generally flat configuration and has a central projection for the button 49 to be formed on its front side.

Three screw holes 47 are provided in the cover 40 of the battery cover 28. The screw hole 47 is for removably fixing the battery cover 28 to the electronic housing 21 by a fixing screw 48.

On the rear side, the cover 40 includes a recess 43 for the other recess 44 to be disposed therein (see Fig. 16). The notches 43, 44 are for accommodating a piezoelectric film 50, a piezoelectric plate 53, and a battery spacer 57. The notches 43 correspond to the piezoelectric plate 53 in shape and size and are adapted to accommodate the piezoelectric plate 53. The recess 44 corresponds to the piezoelectric diaphragm 50 in both a circle and a size and is adapted to accommodate the piezoelectric diaphragm 50. The piezoelectric film 50 and the piezoelectric plate 53 represent electronic components of the button, which are disposed between the battery case 26 and the cover 40.

The piezoelectric film 50 has a configuration well known to those skilled in the art, that is, a metal disk 51 and a ceramic substrate 52 applied to the rear side of the metal disk 51. The metal disc 51 is a circular foil having a thickness approximately equal to the depth of the recess 44. The ceramic substrate 52 is applied as a circular surface coating which is the same center as the metal disk 51. The small bending or deformation of the piezoelectric film 50, particularly caused by the contact force applied to the button 49, causes a change in the voltage measured between the metal disk 51 and the ceramic substrate 52. The PCB 60 is adapted to detect this voltage change of the piezoelectric diaphragm 50.

The electrical connection between the metal disk 51 and the contact 61 of the ceramic substrate 52 to the PCB 60 is achieved via the piezoelectric plate 53. For this purpose, the piezoelectric plate 53 designed as a printed circuit board includes an annular contact surface 54 provided on the front side thereof for contacting the periphery of the metal disk 51, and a central contact surface 55 for contacting the ceramic substrate 52. . The annular contact surface 54 and the central contact surface 55 are each connected within the piezoelectric plate 53 to an individual contact surface 56 disposed on the rear side of the piezoelectric plate 53. When the battery cover 28 is properly attached to the electronic housing 21, the contact surfaces 56 are each in contact with one of the contacts 61 of the PCB 60 to facilitate the transfer of piezoelectric signals from the piezoelectric diaphragm 50 to the PCB 60.

The battery spacer 57 is attached to the rear side of the piezoelectric plate 53 (for example, by an adhesive). The battery spacer 57 is made of a non-conductive plastic material and prevents the battery 41 from coming into contact with the piezoelectric plate 53.

The key steps in the manufacture of battery cover 28 are disclosed in Figures 13 and 14. The figure shows how the piezoelectric plate 53 is attached to the piezoelectric film 50 and the cover 40 by an anisotropic conductive paste 58. The anisotropic conductive paste 58 is applied to either the piezoelectric film 50 and the front side of the cap plate 40 or the front side of the piezoelectric plate 53. The individual components are then combined as intended such that the anisotropic conductive paste 58 contacts each of the piezoelectric plate 53, the piezoelectric film 50, and the cover plate 40. The conductive particles 59 embedded in the anisotropic conductive paste 58 are disposed away from each other and the non-conductive particles 59 are in contact with both the piezoelectric plate 53 and the piezoelectric film 50. Therefore, the anisotropic conductive paste 58 is not electrically conductive in all directions.

The battery cover 28 is then pressed in one direction to bring the cover 40 and the piezoelectric plate 53 closer to each other (see Fig. 14). The pressing can be carried out under the influence of a general temperature of 180-200 ° C (thermal compression). Thereby, the conductive particles 59 move together so that the conductive bridge is formed of the conductive particles 59, and the conductive particles reach the individual contact surfaces 54, 55 of the piezoelectric plate 53 from the metal disk 51 of the piezoelectric film 50 and the ceramic substrate 52. The piezoelectric film 50 and the piezoelectric plate 53 can even be moved to each other, that is, the single conductive particles 59 and the piezoelectric film 50 are in contact with the piezoelectric plate 53, as shown in FIG. Therefore, at the final position of the battery cover 28, the electrical contact is between the metal disk 51 of the piezoelectric film 50 and the annular contact surface 54 of the piezoelectric plate 53, and on the other hand, the piezoelectric film. The anisotropic conductive paste 58 between the ceramic substrate 52 of the sheet 50 and the central contact surface 55 of the piezoelectric plate 53 is established. However, the anisotropic conductive paste 58 is still non-conductive in a direction perpendicular thereto.

By attaching the piezoelectric diaphragm 50 to the piezoelectric plate 53 using an anisotropic conductive paste 58, a particularly safe and space-saving mechanical and electrical connection between the two components can be achieved.

The function of the button 49 in this embodiment is programmed in the PCB 60 to cause the electronic unit 20 and, in particular, the display 30 to switch when the button 49 is first touched, and the indication of the radial displacement on the display 30 is at the button 49 Reset to zero when the second touch lasts longer than one second.

The boring head 1 according to the present embodiment is adapted to wirelessly transmit a data signal from the electronic unit 20 to an external device such as a computer, a mobile phone, or a adjuster for adjusting the adjustment screw 13. Therefore, the radial displacement data of the cutting insert 14 can be displayed not only on the display 30 but also on the external device.

17 and 18 disclose the case where the boring head 1 is adapted to wirelessly transmit a data signal to an external device. For this purpose, the boring head 1 comprises a transmitting unit having an antenna adapted to send electromagnetic waves. In this embodiment, the transmitting unit is adapted to wirelessly communicate with an external device in accordance with the "Bluetooth Low Power" standard. Of course, other wireless communication standards are also applicable, and the boring head 1 and especially the transmitting unit are applicable.

The transmitting unit also includes a Bluetooth microcontroller disposed in the PCB 60 for generating a 2.4 GHz Bluetooth signal, and a matching circuit having a column of inductors and capacitors, suitable for forming one of the Bluetooth microcontroller antennas in two directions. The impedance is the same 50Ω impedance to minimize power consumption.

As shown in FIG. 17, display window 25 is used to send electromagnetic antenna radiation 70 from electronic unit 20 to an external device. Thus, the antenna radiation 70 is transmitted through the display window 25 to the outside of the boring head 1.

In this embodiment, the antenna for wireless data transmission is formed by an internal radio frequency (RF) ground plane 67. The ground plane is integrated into the PCB in the rear area of the display window 25 by the antenna connection screw 66 and the electronic housing 21. 60 (see Figure 18). The metallic and electrically conductive electronic housing 21 represents the electrically conductive elements of the antenna exposed in space. The ground plane 67 and the conductive elements (i.e., the electronic housing 21) form the leg members of the antenna. The antenna connection screw 66 serves as a connection between the PCB 60 and the conductive member (i.e., the electronic housing 21). Accordingly, the antenna connection screw 66 is made of a conductive material, that is, a metal such as aluminum, and the fixing screw 65 can be made of any material and is also made of a low or non-conductive material such as a plastic material or titanium. In order to connect the antenna connection screw 66 to an antenna fed to the PCB 60, the PCB 60 includes a contact surface that surrounds the corresponding screw hole 69. In the present embodiment, the ground plane 67 is designed as a rectangular area covering most of the rear side of the display window 25.

The invention is of course not limited to the above embodiments, and many variations are possible. For example, an antenna for wirelessly transmitting data to an external device may be designed as a ceramic antenna behind the display window 25, a microstrip antenna behind the display window 25, and particularly a patch antenna or configuration disposed on the PCB 60 and behind the display window 25. A slot antenna in the display window 25. The button 49 is not necessarily integrated into the battery cover 28, and it may be provided separately from the battery cover. Instead of using a piezoelectric element, the button can be set to any other button depending on the state of the art. In an alternative embodiment, the stem 3 may also be conical or have a polygonal cross section. Furthermore, the function of the sensor 16 and the measurement zone 15 for measuring the radial displacement of the tool carrier 10 can also be based on optical, capacitive or inductive measurements. Instead of wireless communication according to the "Bluetooth" standard, the transmitting unit can also be adapted for communication according to ANT, ZigBee or any other standard. There are many other variations that can be made.

Claims (16)

 A boring head (1) having an electronic unit (20) integrated in the boring head (1), the electronic unit (20) comprising: a control unit (60), a display (30) connected to the control unit (60) for displaying information related to the condition of the boring head (1) to the user, and a compartment (26) for the power source (41) for supplying power to the control unit (60) and the display ( 30), characterized in that the electronic unit (20) is integrally designed as a compact sub-assembly of the boring head (1).    The boring head (1) of claim 1 wherein the electronic unit (20) also includes at least one button (49) operatively coupled to the control unit (60) to facilitate the user Affect the control unit (60).    The boring head (1) of claim 2, wherein the compartment (26) for the power source (41) is disposed between the control unit (60) and the button (49).    The boring head (1) of claim 3, wherein the cover member (28) is disposed to cover the compartment (26) for the power source (41), and wherein the button (49) is A cover member (28) is formed.    The boring head (1) of one of claims 2 to 4, wherein the electronic unit (20) also includes a piezoelectric element (50) for detecting a user operating the button (49) The situation.    The boring head (1) of claim 5, wherein the piezoelectric element forms a piezoelectric diaphragm (50), and wherein the piezoelectric diaphragm (50) is made of an anisotropic conductive adhesive (58) ) is connected to the control unit (60).    The boring head (1) of claim 6 wherein the electronic unit (20) further comprises a piezoelectric plate (53) for the piezoelectric film (50) to pass the anisotropic conductive adhesive ( 58) Connected thereto, and wherein the piezoelectric plate (53) is disposed between the chamber (26) for the power source (41) and the piezoelectric element (50).    The boring head (1) as claimed in one of claims 1 to 4, further comprising a radially displaceable insert holder (11) and the same for measuring the insert holder (11) a radially displaced sensor (16) coupled to the control unit (60), and the control unit (60) is adapted to control the display (30) such that the radial displacement is caused by The display (30) is displayed.    A boring head (1) according to any one of claims 1 to 4, wherein the electronic unit (20) comprises a housing (21) for the control unit (60) to be operatively coupled to The display (30) of the control unit (60) and the compartment (26) for the power source (41), and preferably also the button (49) are disposed in or on the housing (21) .    A boring head (1) according to claim 9 wherein a printed circuit board (PCB) (60) is provided as the control unit, and wherein the PCB (60) forms the same with the housing (21) The internal space of the electronic unit (20), the display (30) and the compartment (26) for the power supply (41) are arranged in the internal space, in particular completely in the internal space.    A boring head (1) according to claim 9 wherein a printed circuit board (PCB) (60) is provided as the control unit and forms a rear side of the electronic unit (20), and wherein the PCB (60) Forming an internal space of the electronic unit (20) together with the housing (21), the display (30) and the compartment (26) for the power supply (41) being disposed in the internal space, in particular fully configured In this internal space.    A boring head (1) as claimed in one of claims 1 to 4, wherein a printed circuit board (PCB) (60) is provided as the control unit.    The boring head (1) of claim 12, wherein the PCB (60) forms the rear side of the electronic unit (20).    A boring head (1) as claimed in one of claims 1 to 4, wherein the electronic unit (20) also includes an antenna (42, 66, 67) for wirelessly from the control unit (60) Transfer data to an external device.    A boring head (1) according to any one of claims 1 to 4, wherein the boring head (1) comprises a body (2) having a recess (5), and wherein the electronic unit ( 20) disposed in the pocket (5).    An electronic unit (20) for use in one of the aforementioned patent claims, the electronic unit (20) comprising: a control unit (60), a display (30) connected to the control unit ( 60) for displaying information related to the condition of the boring head (1) to the user, and the compartment (26) for the power source (41) for supplying power to the control unit (60) and the display (30) ), characterized in that the electronic unit (20) is integrally designed as a compact sub-assembly.