TWI742162B - 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 present invention relates to a boring head with an electronic unit and the electronic unit of the boring head. In particular, the present invention relates to a boring head for holding a cutting insert, wherein the boring head is suitable for transferring rotational motion from a driving source in a machine tool to a cutting insert specially designed for wafer forming metal cutting.

The boring head is used for wafer forming metal cutting, for example, and usually includes a radially displaceable insert holder to allow the 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 to the user by the scale provided on the adjusting screw. The insert fixing seat can be moved radially by the adjusting screw.

In high-precision tool knives and in order to provide users with better comfort, it is usually necessary to use a display to digitally indicate the radial displacement of the cutting insert, along with other possible status data of the boring head. For this purpose, in addition to or instead of adjusting screws with scales, a display, such as a liquid crystal display (LCD), can be set.

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

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

The setting of the display in the boring head results in a complicated and expensive structure of the boring head, because not only the sensor used to measure the displacement of the insert holder must be installed separately, but also the control unit and certain types of power supplies. Control the display and supply power to the display and control unit. All these electronic components forming the electronic unit must be positioned in the limited space of the boring head and must be internally connected to each other.

Furthermore, due to the generally high rotation speed, most of the electronic components and wires used to connect these components are exposed to high centrifugal force during the operation of the boring head. At one of the covers leading to these electronic components and wires, dirt particles and coolant have a high risk of intrusion. Therefore, the arrangement of the electronic unit increases the risk of component failure in the prior art boring head.

One object of the present invention is to provide a boring head with an electronic unit, which has a simplified structure and reduced risk of failure.

This purpose can be solved by the boring head in item 1 of the scope of patent application. Further embodiments of the boring head are provided in the appendix of the scope of patent application. The electronic unit of this boring head is declared 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 related to the axis of rotation defined by the general direction of rotation of the boring head under normal use (that is, when processing a work piece) The radial direction of the vertical boring head. The front side of the element of the boring head usually refers to the side of the element that faces radially outward, so it can represent the element that is visible to the user. The back side usually refers to the side of the component that faces radially inward.

The present invention provides a boring tool head with an electronic unit integrated in the boring tool head. The electronic unit includes: a control unit, a display, connected to the control unit for displaying information related to the condition of the boring tool head to a user, and The cabin is used to supply power to the control unit and the power supply of the display.

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

The boring head is suitable for transferring the rotary movement from the driving source (for example, the main shaft of the machine tool) to the cutting insert for processing the work piece. The cutting insert is particularly suitable for wafer forming metal cutting. The boring head usually includes a main body, which can be attached to the electronic unit and preferably includes a shaft and a head. The rod is preferably mainly cylindrical, but may also have a conical or polygonal cross-section. The head is preferably mainly cylindrical. The rod is usually connected to the boring head to a driving source, such as the main shaft of a machine tool. The cutting insert is attached to the head and is used to process the work piece and is preferably also an electronic unit. The electronic unit forms an integrated component of the boring head and is usually completely arranged in the cutting insert, at least at the radially outermost edge of the cutting insert.

Setting the compact sub-assembly relative to the electronic unit means that the electronic unit represents a modular component, which is clearly separated from the rest of the boring head. Therefore, the electronic unit as a whole is related to other components of the boring head to form individual and clearly separated structural components. The different components of the electronic unit, that is, at least the control unit, the display, and the compartment for the power supply, are usually tightly arranged and all the wires that interconnect these different components preferably extend inside the electronic unit and do not pass through the cutting head. other parts. Optionally, the electronic unit can be completely and non-destructively removed from the boring head by just a few simple operations, for example, by loosening some screws. According to this, after the boring head is removed, the electronic unit forms a single and A compact single piece.

Due to the compact structure of the sub-assembly form, the electronic unit can be manufactured completely separated from the rest of the boring head. Because all the wires interconnecting the components of the electronic unit preferably extend inside the electronic unit, the number of wires existing in the boring head can be greatly reduced. Advantageously, in order to further reduce the risk of failure, the electronic unit does not include all wires, but only electrical connections in the form of contacts, printed circuits, etc. Due to the compact structure of the electronic unit, the boring head can be selectively constructed to facilitate the removal of the electronic unit from the main body, for example for cleaning or replacement. Furthermore, the electronic unit with a compact structure can be ideally sealed with respect to dust particles and liquids. Therefore, the boring head also reduces the risk of failure.

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

The power source is preferably represented by a general battery. In a preferred embodiment, the compartment is suitable for accommodating button batteries, which is particularly space-saving. In the cabin, individual contacts are usually provided to electrically connect the power supply to the control unit and the display.

Preferably, the electronic unit also includes at least one button, which is operatively connected to the control unit, so that the user can influence the control unit. It is advantageously designed as a button, which is preferably used to switch on and off an electronic unit, in particular a display. Depending on, for example, the order of operations or duration, the buttons can provide further information, such as reset functions.

If the cabin for the power supply is arranged 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 source. The cover is preferably removably attached to the boring head, for example by screws, so as to facilitate the replacement of the power source when necessary. If the electronic unit also includes a button, the button is preferably formed by the cover of the cabin. This design of the electronic unit is particularly space-saving.

The functional principle of the button is preferably based on a piezoelectric element. The piezoelectric element is suitable for detecting the user's operation of the button. With the setting of the piezoelectric element, the smallest movement of the button can usually be detected, even in the micron range. With this button, a particularly tight seal 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 diaphragm is connected to the control unit by an anisotropic conductive glue. The electronic unit may also include a piezoelectric plate, for which the piezoelectric diaphragm is connected by an anisotropic conductive glue. The anisotropic conductive adhesive is preferably an adhesive, such as an adhesive, which itself is non-conductive but allows conductive particles to be embedded in it. When two components attached to each other (ie, piezoelectric diaphragm and piezoelectric plate) are pressed together, selectively under the influence of temperature (thermal compression), the anisotropic conductive adhesive disposed therebetween is compressed 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 by the conductive particles. By using anisotropic conductive glue to connect the piezoelectric diaphragm to the control unit, especially the piezoelectric plate, a particularly stable and space-saving connection method for the piezoelectric diaphragm can be achieved.

It should be noted that the principle of connecting the piezoelectric diaphragm to the control unit, or to the connecting element, and especially the PCB, is basically applicable to other boring heads by means of anisotropic conductive glue. Individual boring heads suitable for the application of this principle usually have piezoelectric buttons, but they do not necessarily include a display or a compact electronic unit. Therefore, the principle of connecting the piezoelectric diaphragm to the control unit or connecting element by anisotropic conductive adhesive represents another independent invention.

The piezoelectric plate can be in the form of a printed circuit board. Preferably, the piezoelectric plate is arranged between the compartment for the power supply and the piezoelectric element.

In a preferred embodiment, the boring head includes a radially displaceable insert holder and a sensor for measuring the radial displacement of the insert holder. The sensor is preferably connected to the control unit, and the control unit is suitable for controlling the display, so that the radial displacement of the insert fixing seat is displayed by the display.

Advantageously, the electronic unit includes a housing for operably connected to the display of the control unit and the compartment for the power supply, and preferably also together with the buttons, are arranged 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. Therefore, in this embodiment, the housing together with the control unit, the display, the compartment for the power supply, and preferably also together with the buttons form a separate sub-assembly of the boring head, which can be attached by only a few fixing screws, for example.于主。 In the main body.

The control unit is preferably configured as a printed circuit board (PCB). The PCB advantageously includes 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, that is, the rear side wall of the electronic unit can be formed.

In a preferred embodiment, the PCB and the housing together form the internal space of the electronic unit, and the display and the compartment for the power supply are especially completely arranged in the internal space. The electronic components of the button (for example, piezoelectric components) are preferably also arranged in this internal space.

The electronic unit is preferably suitable for wireless communication with external devices, such as computers or mobile phones. The electronic unit is particularly suitable for wireless communication according to the "Bluetooth Low Energy" standard. In order to wirelessly transmit data from the control unit to an external device, the electronic unit preferably includes an antenna. Advantageously, the window holes of the housing of the electronic unit are used to transmit the antenna radiation to the outside. Therefore, the antenna is suitable for radiating electromagnetic waves through the windows of the housing. The window hole is preferably a display window to allow the user to see the display. Advantageously, the antenna includes 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 element form the two legs of the antenna. The ground plane is advantageously arranged directly on the rear side of the display window. In an alternative type, and also a preferred embodiment, the integral antenna can be integrated into the PCB. In this example, the antenna is advantageously arranged directly on the rear side of the display window, so that electromagnetic waves can be radiated from the antenna through the display window to the outside.

The main body preferably includes a cavity, and the cavity is preferably open in a radial direction. The electronic unit is advantageously arranged in this cavity. The recess is preferably provided in the head, especially in the substantially cylindrical side wall of the head.

1‧‧‧Boring head

2‧‧‧Main body

3‧‧‧Pole

4‧‧‧Head

5‧‧‧Cavity

6‧‧‧Inscribed

7‧‧‧Bolt

10‧‧‧Tool Carrier

11‧‧‧Insert holder

12‧‧‧Clamping screw

13‧‧‧Adjusting screw

14‧‧‧Cutting inserts

15‧‧‧Measurement area

16‧‧‧Sensor

20‧‧‧Electronic Unit

21‧‧‧Electronic housing

22‧‧‧Screw hole

23‧‧‧Screw hole

24‧‧‧Fixed screw

25‧‧‧Display window

26‧‧‧Battery box (cabin)

27‧‧‧Screw hole

28‧‧‧Battery cover

30‧‧‧Display

31‧‧‧Display glass cover

32‧‧‧Isolation foil

33‧‧‧LCD

34‧‧‧Thick strip connector

40‧‧‧Cover plate

41‧‧‧Battery

42‧‧‧Battery housing

43‧‧‧Notch

44‧‧‧Notch

45‧‧‧Upper battery seal

46‧‧‧Lower battery seal

47‧‧‧Screw hole

48‧‧‧fixing screw

49‧‧‧ button

50‧‧‧piezoelectric diaphragm

51‧‧‧Metal Disc

52‧‧‧Ceramic substrate

53‧‧‧Piezoelectric plate

54‧‧‧Annular contact surface

55‧‧‧Central contact surface

56‧‧‧Contact surface

57‧‧‧Battery Spacer

58‧‧‧Viscose

59‧‧‧Conductive particles

60‧‧‧Printed Circuit Board

61‧‧‧Contact element

62‧‧‧Bottom battery contact

63‧‧‧Side battery contact

64‧‧‧Electronic components

65‧‧‧fixing screw

66‧‧‧Antenna connection screw

67‧‧‧Ground plane

68‧‧‧Main seal

69‧‧‧Screw hole

70‧‧‧antenna radiation

The preferred embodiments of the present invention are described below with reference to the drawings, which are only to disclose the preferred embodiments of the present invention, not to limit the present invention. In the figure: FIG. 1 shows the boring head according to the embodiment of the present invention. Perspective view; Figure 2 shows a top view of the boring head of Figure 1; Figure 3 shows a side view of the boring head of Figure 1, part of the central section; Figure 4 shows the front side of the electronic unit of the boring head of Figure 1 without a battery cover Figure 5 shows a front perspective view of the electronic unit of the boring head of Figure 1 without a battery cover; Figure 6 shows a rear perspective view of the electronic unit of the boring head of Figure 1 without a battery cover; Figure 7 shows a perspective view along Figure 4 A cross-sectional perspective rear view of the electronic unit of the boring head of Figure 1 without a battery cover, taken from line VII-VII; Figure 8 shows an exploded perspective view of the electronic unit of the boring head of Figure 1 without a battery cover; Figure 9 Fig. 1 shows a plan view of the front side of the battery cover of the electronic unit of the knife head; Fig. 10 shows a front perspective view of the battery cover of the electronic unit of the knife head of Fig. 1; Fig. 11 shows the battery of the electronic unit of the knife head of Fig. 1 Fig. 12 shows a cross-sectional view of the battery cover of the electronic unit of the boring head of Fig. 1; Fig. 13 shows an enlarged view of the area marked by the dotted line in Fig. 12 during the production period before the battery cover is pressed in; Fig. 14 Reveals the enlarged view of the area marked by the dotted line in Fig. 12 during the production period after the battery cover is pressed; Fig. 15 reveals the front perspective exploded view of the battery cover of the electronic unit of the squeegee head of Fig. 1; Fig. 16 reveals the lining of Fig. 1 The rear perspective exploded view of the battery cover of the electronic unit of the cutter head; Fig. 17 shows the perspective view of the cutter head of Fig. 1 when the data is wirelessly transmitted by the integrated antenna; and Fig. 18 shows the electronic unit of the cutter head of Fig. 1 The plan view of the front side of the printed circuit board (PCB).

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

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

In order to fix the boring head 1 on a driving source of a boring machine or milling machine in a torque-resistant manner, a bolt 7 is displaceably arranged in the rod 3. The bolt 7 extends laterally (that is, radially) through the shank 3.

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

The head 4 of the boring head 1 includes a transverse (ie, radial) channel extending through the head 4 along the diameter. A tool carrier 10 in the form of a plunger is arranged in this channel (please refer to FIG. 3). An insert holder 11 is attached to the first end surface of the tool carrier 10 outside the channel. The insert fixing base 11 is attached to the tool carrier 10 by a clamping screw 12. The insert holder 11 holds a cutting insert 14 which has a cutting edge and is suitable for directly cutting wafer forming metal on a work piece. Along the radial direction, the cutting edge of the cutting insert 14 represents the outermost component of the boring bit 1.

Attached to the second end surface of the tool carrier 10 is an adjustment screw 13 by which the tool carrier 10 can be displaced along 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 adjusting screw 13 rotates, the tool carrier 10 is displaced along the radial direction. The scale can be selectively printed on the adjusting screw 13 to indicate the approximate displacement of the tool carrier 10 to the user.

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

A recess 5 is provided on one side of the head 4, which side faces a vertical direction relative to the longitudinal extension of the tool carrier 10. The cavity 5 defines a cuboid internal space of the head 4 that opens outwards. The internal space of the cavity 5 is used for accommodating an electronic unit 20.

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

In order to measure the actual radial displacement of the tool carrier 10, a measurement area 15 is provided on the tool carrier 10, as shown in FIG. 3. The measurement area 15 is disposed adjacent to a fixed sensor 16, and the sensor is suitable for measuring the radial displacement of the measurement area 15 relative to the sensor 16. The sensor 16 can be, for example, a hall-sensor or anisotropic magnetoresistance, and the measurement area 15 is a permanent magnet.

The sensor 16 is electrically connected to the PCB 60 of the electronic unit 20 so that a signal reflecting the actual displacement of the tool carrier 10 can be transferred to the PCB 60. The PCB 60 includes contact elements or surfaces provided on the rear side thereof for contacting individual contact elements connected to the sensor 16.

It can be seen from FIGS. 4 to 7 that the overall electronic unit 20 basically has a cubic shape, and is assembled in the cavity 5 of the head 4. The external shape of the electronic unit 20 is mainly defined by an electronic housing 21, which is made of metal as a single piece. The electronic housing 21 has an internal space for the display 30 and the battery box 26 to be completely disposed therein. The internal space is separated by the electronic housing 21 and the PCB 60, and the PCB 60 forms the rear side of the electronic unit 20. Therefore, as a whole, the electronic unit 20 has a compact structure.

The electronic housing 21 forms a substantially rectangular horizontal frame in the peripheral direction, which is horizontally related to the sidewall of the cavity 5 to separate the electronic unit 20 and its electronic components. The internal space of the electronic housing 21 is divided into two compartments, namely a first compartment for accommodating the display 30 and a second compartment for accommodating the battery 41. The two compartments of the internal space are separated in all directions 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 internal 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 FIGS. 4 and 7). The second compartment of the internal space is partitioned by a removable battery cover 28 near the front side (see FIG. 3), so that the battery box 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 in each corner of the electronic housing 21, as can be seen from FIGS. 4-6. The PCB 60 includes corresponding cutouts provided at each corner thereof (refer to FIG. 6). In order to install the electronic unit 20 on the main body 2 of the boring head 1, a fixing screw 24 (refer to FIG. 1) is guided through the screw hole 22 and screwed into an individual screw hole correspondingly provided on the main body 2 for this purpose. Therefore, the electronic unit 20 forms a compact sub-assembly of the boring head 1 and can be made completely separated from the rest of the boring head 1. After being manufactured, the entire electronic unit 20 can be easily screwed to the main body 2 by the fixing screw 24.

In order to achieve a substantially flat front surface of the assembled electronic unit 20 as a whole, the electronic housing 21 includes a notch provided in the front surface of the battery box 26 and used for accommodating the battery cover 28. The size of the notch is designed to be completely filled by the battery cover 28 in the lateral direction 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 provided on the electronic unit 20 for fixing the battery cover 28 on the electronic housing 21 by a fixing screw 48.

The structure of the display 30 can be seen from FIG. 8, which includes a display glass cover 31, a spacer 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 is used to protect the LCD 33 from external mechanical influences, dust particles and moisture. The isolation foil is arranged between the display glass cover 31 and the LCD 33.

The LCD 33 is used to indicate the user about the radial displacement of the tool carrier 10 and the cutting insert 14. For this purpose, the LCD 33 is electrically connected to the surface array of the connectors provided on the PCB 60 through the thick-striped connectors 34. The thick strip connecting piece 34 also serves as a spacer for arranging the LCD 33 close to the display glass cover 31 and the display window 25.

A number of electronic components 64 are arranged on the PCB 60 forming one of the control units of the electronic unit 20, and the electronic components are connected to each other by corresponding conductor tracks. The electronic component 64 of the PCB 60 usually includes an analog-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 corresponding input signals to LCD 33. The PCB 60 also includes a memory chip for storing the measured displacement data. The electronic component 64 is preferably arranged on the rear side of the PCB 60.

The contact pieces 62, 63 are arranged on the front side of the PCB 60, and are used to contact the battery 41-the bottom battery contact piece 62 is used to contact the first electrode of the battery 41 and the side battery contact piece 63 is used to contact the second electrode of the battery 41. In this article, they are button batteries, especially CR 1025 lithium batteries.

Another contact 61 is 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 (to be described in detail later), the contact 61 is constructed as a spring contact.

In order to use three fixing screws 65 and an antenna connecting screw 66 to fix the PCB 60 on the electronic housing 21 (detailed later), the PCB includes a screw hole 69 corresponding to the screw hole 27 provided on the rear side of the electronic housing 21 . A main sealing member 68 is disposed between the electronic housing 21 and the PCB 60 to protect the inside of the electronic unit 20 and the inside of the boring head 1 from dust particles and moisture.

The second compartment of the internal space of the electronic unit 20 includes a battery box 26 for accommodating the battery 41. It can be seen from FIGS. 7 and 8 that a battery housing 42 is disposed in the second compartment. The battery case 42 is made of a non-conductive material, such as plastic, and separates the battery case 26 laterally and at least partially toward the rear side thereof. The lower battery sealing member 46 is configured to seal the battery housing 42 to the PCB 60 and the electronic housing 21, and an upper battery sealing member 45 is configured to seal the battery housing 42 to the battery cover 28 and the battery housing 42.

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

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

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

On the rear side, the cover plate 40 includes a notch 43 for another notch 44 to be provided therein (see FIG. 16). The notches 43 and 44 are used for accommodating a piezoelectric diaphragm 50, a piezoelectric plate 53 and a battery spacer 57. The notch 43 corresponds to the piezoelectric plate 53 in shape and size and is suitable for accommodating the piezoelectric plate 53. The notch 44 corresponds to the piezoelectric diaphragm 50 in both the circular shape and the size, and is suitable for accommodating the piezoelectric diaphragm 50. The piezoelectric diaphragm 50 and the piezoelectric plate 53 represent the electronic components of the button, which are arranged between the battery box 26 and the cover 40.

The piezoelectric diaphragm 50 has a structure well known to those skilled in the art, that is, a metal disc 51 and a ceramic substrate 52 applied to the back side of the metal disc 51. The metal disc 51 is a circular foil with a thickness approximately equal to the depth of the recess 44. The ceramic substrate 52 is applied as a circular surface coating with the same center as the metal disc 51. The slight bending or deformation of the piezoelectric diaphragm 50, especially caused by the load of the touch applied to the button 49, causes the voltage measured between the metal disc 51 and the ceramic substrate 52 to change. The PCB 60 is suitable for detecting this voltage change of the piezoelectric diaphragm 50.

The electrical connection between the metal disc 51 and the ceramic substrate 52 to the contact 61 of the PCB 60 is achieved through 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 its front side for contacting the periphery of the metal disc 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 arranged on the rear side of the piezoelectric plate 53. When the battery cover 28 is correctly attached to the electronic housing 21, the contact surfaces 56 each contact one of the contacts 61 of the PCB 60 to facilitate the transmission 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 contacting the piezoelectric plate 53.

The key steps in the manufacturing process of the battery cover 28 are disclosed in Figs. 13 and 14. The figure shows how the piezoelectric plate 53 is attached to the piezoelectric diaphragm 50 and the cover plate 40 by an anisotropic conductive adhesive 58. The anisotropic conductive glue 58 is applied to any one of the rear side of the piezoelectric diaphragm 50 and the cover plate 40 or the front side of the piezoelectric plate 53. The individual components are then combined as expected, so that the anisotropic conductive adhesive 58 contacts each of the piezoelectric plate 53, the piezoelectric diaphragm 50 and the cover plate 40. The conductive particles 59 embedded in the anisotropic conductive glue 58 are arranged to be far away from each other without the conductive particles 59 contacting both the piezoelectric plate 53 and the piezoelectric film 50. Therefore, the anisotropic conductive adhesive 58 does not conduct electricity in all directions.

The battery cover 28 is then pressed down in one direction, so that the cover plate 40 and the piezoelectric plate 53 are moved closer to each other (see FIG. 14). The pressing can be carried out under the influence of the general temperature of 180-200℃ (thermal compression). Thereby, the conductive particles 59 move together, so that the conductive bridge is formed by the conductive particles 59, and the conductive particles reach the individual contact surfaces 54 and 55 of the piezoelectric plate 53 from the metal disc 51 and the ceramic substrate 52 of the piezoelectric diaphragm 50. The piezoelectric diaphragm 50 and the piezoelectric plate 53 can even be moved to merge with each other, that is, the single conductive particle 59 and the piezoelectric diaphragm 50 and the piezoelectric plate 53 are in contact with each other, as shown in FIG. 14. Therefore, in this depressed final position of the battery cover 28, the electrical contact is made between the metal disc 51 of the piezoelectric diaphragm 50 and the annular contact surface 54 of the piezoelectric plate 53 on the one hand, and on the other hand by the piezoelectric film The anisotropic conductive glue 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 adhesive 58 is still non-conductive along the direction perpendicular to it.

By using the anisotropic conductive glue 58 to attach the piezoelectric diaphragm 50 to the piezoelectric plate 53, 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, so that the electronic unit 20 and especially the display 30 are switched when the button 49 is first touched, and the indication of the radial displacement on the display 30 is in the button 49 Reset to zero when the second touch lasts for more than one second.

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

Figures 17 and 18 show that the boring head 1 is suitable for wirelessly transmitting data signals to an external device. For this purpose, the boring head 1 includes a transmitting unit with an antenna, which is suitable for sending out electromagnetic waves. In this embodiment, the transmitting unit is suitable for wireless communication with external devices according to the "Bluetooth Low Energy" standard. Of course, other wireless communication standards may also be applicable, and the boring head 1 and especially the transmitting unit are applicable.

The transmitting unit also includes a Bluetooth microcontroller configured in the PCB 60 for generating 2.4GHz Bluetooth signals, and a matching circuit with a row 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, the display window 25 is used to send electromagnetic antenna radiation 70 from the electronic unit 20 to an external device. Therefore, the antenna radiation 70 is transmitted through the display window 25 to the outside of the boring head 1.

In this embodiment, the antenna used for wireless data transmission is formed by an internal radio frequency (RF) ground plane 67. The ground plane is integrated into the PCB behind the display window 25 by the antenna connection screw 66 and the electronic housing 21. 60 in (see Figure 18). The metallic and conductive electronic housing 21 represents the conductive element of the antenna exposed in the space. The ground plane 67 and the conductive element (ie, the electronic housing 21) form the two legs of the antenna. The antenna connection screw 66 serves as a connection between the PCB 60 and the conductive element (that is, the electronic housing 21). Accordingly, the antenna connection screw 66 is made of a conductive material, that is, 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 that is fed to the PCB 60, the PCB 60 includes a contact surface surrounding the corresponding screw hole 69. In this embodiment, the ground plane 67 is designed as a rectangular area to cover most of the rear side of the display window 25.

The present invention is of course not limited to the above-mentioned embodiments, and many variations are possible. For example, the antenna used to wirelessly transmit data to an external device can be designed as a ceramic antenna behind the display window 25, a micro-strip antenna behind the display window 25, especially a patch antenna or configuration on the PCB 60 and behind the display window 25 Slot antenna in the display window 25. The button 49 is not necessarily integrated in the battery cover 28, and it can also be provided separately from the battery cover. Instead of using piezoelectric elements, the button can be set to any other button according to the state of technology. In an alternative embodiment, the rod 3 may also be conical or have a polygonal cross-section. Furthermore, the functions of the sensor 16 and the measuring area 15 for measuring the radial displacement of the tool carrier 10 can also be based on optical, capacitive or inductive measurement. 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 can be many other changes.

3‧‧‧Pole

4‧‧‧Head

5‧‧‧Cavity

6‧‧‧Inscribed

7‧‧‧Bolt

10‧‧‧Tool Carrier

12‧‧‧Clamping screw

14‧‧‧Cutting inserts

15‧‧‧Measurement area

16‧‧‧Sensor

20‧‧‧Electronic Unit

21‧‧‧Electronic housing

26‧‧‧Battery box (cabin)

28‧‧‧Battery cover

33‧‧‧LCD

40‧‧‧Cover plate

41‧‧‧Battery

42‧‧‧Battery housing

48‧‧‧fixing screw

60‧‧‧Printed Circuit Board

Claims (15)

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 the cabin (26) for the power supply (41) to supply power to the control unit (60) and the display ( 30), and at least one button (49), the button is operatively connected to the control unit (60) to facilitate the user to influence the control unit (60), wherein the electronic unit (20) is integrally designed as the knife The compact sub-assembly of the head (1), and the cover (28) is arranged to cover the compartment (26) for the power supply (41), characterized in that the button (49) is formed by the cover ( 28) Formation. For example, the boring head (1) of item 1 of the scope of patent application, wherein the compartment (26) for the power supply (41) is arranged between the control unit (60) and the button (49). For example, the boring head (1) of one of items 1 or 2 of the scope of patent application, wherein the electronic unit (20) also includes a piezoelectric element (50) to facilitate detection The situation where the user manipulates the button (49). For example, the boring head (1) of item 3 of the scope of patent application, wherein the piezoelectric element forms a piezoelectric diaphragm (50), and wherein the piezoelectric diaphragm (50) is made of anisotropic conductive adhesive (58) ) Is connected to the control unit (60). For example, the boring head (1) of item 4 of the scope of patent application, wherein the electronic unit (20) also includes a piezoelectric plate (53) for the piezoelectric diaphragm (50) to use the anisotropic conductive adhesive ( 58) is connected here, and therein, the piezoelectric plate (53) is arranged between the compartment (26) for the power source (41) and the piezoelectric element (50). For example, the boring head (1) of one of item 1 or 2 of the scope of patent application also includes a radially displaceable insert holder (11) and the insert holder (11) used to measure the A sensor (16) for radial displacement, the sensor (16) is connected to the control unit (60), and the control unit (60) is adapted to control the display (30) so that the radial displacement is determined by This display (30) shows. For example, the boring head (1) of one of items 1 or 2 of the scope of patent application, wherein the electronic unit (20) includes a housing (21), the control unit (60), the display (30) and the user The compartment (26) of the power source (41) is arranged in or on the casing (21). For example, the boring head (1) of item 7 of the scope of patent application, wherein the button (49) that is operably connected to the control unit (60) is also arranged in the housing (21) Within or above. For example, the boring head (1) of one of items 7 or 8 of the scope of patent application, in which a printed circuit board (PCB) (60) is provided as the control unit, and in which, the PCB (60) and the housing (21) The internal space of the electronic unit (20) is formed together, and the display (30) and the cabin (26) for the power supply (41) are arranged in the internal space. For example, the boring head (1) of one of items 7 or 8 of the scope of patent application, wherein a printed circuit board (PCB) (60) is provided as the control unit and forms the rear side of the electronic unit (20), and , The PCB (60) and the housing (21) together form the internal space of the electronic unit (20), and the display (30) and the compartment (26) for the power supply (41) are arranged in the internal space middle. For example, the boring head (1) of one of items 1 or 2 of the scope of patent application, wherein a printed circuit board (PCB) (60) is provided as the control unit. For example, the boring head (1) of item 11 in the scope of patent application, wherein the PCB (60) forms the back side of the electronic unit (20). For example, the boring head (1) of one of items 1 or 2 of the scope of patent application, wherein the electronic unit (20) also includes an antenna (42, 66, 67) for wirelessly transmitting from the control unit (60) Transfer data to external devices. For example, the boring head (1) of one of items 1 or 2 of the scope of patent application, wherein the boring head (1) includes a main body (2) with a cavity (5), and the electronic unit ( 20) Disposed in the cavity (5). An electronic unit (20), used for the boring head (1) of one of items 1 or 2 of the scope of patent application. The electronic unit (20) includes: a control unit (60), a display (30), and a connection The control unit (60) is used to display information related to the condition of the boring head (1) to the user, and the cabin (26) is used for the power supply (41) to supply power to the control unit (60) And the display (30), at least one button (49), the button is operatively connected to the control unit (60), so that the user can influence the control unit (60), and the cover (28) to cover the In the compartment (26) of the power supply (41), the electronic unit (20) is integrally designed as a compact sub-assembly, characterized in that the button (49) is formed by the cover (28).

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