Drill bit machining apparatus

Abstract

To provide a drill machining device with good measurement accuracy. The drill machining device includes a moving unit that holds a drill and moves the drill in a vertical direction, a light projecting unit that projects light on the drill, a light receiving unit that receives the light, and a measurement unit that measures the amount of runout of the drill based on the result of receiving the light.

Description

Technical Field

[0001] This invention relates to a drill bit processing apparatus for hole drilling using a drill bit. Background Technology

[0002] Previously, there was a known drill bit processing device that used a drill bit to open holes such as positioning holes on a printed circuit board.

[0003] For example, as described in Patent Document 1, the drill bit processing apparatus includes a rotary drilling tool for drilling a required hole in a printed circuit board. Furthermore, the drill bit processing apparatus measures the core runout during rotation.

[0004] [Existing Technical Documents] [Patent Literature] [Patent Document 1] Japanese Patent Application Publication No. 2-250749. Summary of the Invention

[0005] [The problem the invention aims to solve] However, drill bits operate at various speeds. Furthermore, the amount of core wobble varies considerably depending on the speed. Therefore, prior art suffers from poor measurement accuracy.

[0006] The purpose of this invention is to provide a drill bit processing device with good measurement accuracy.

[0007] [Problem-solving methods] To achieve the above objectives, the drill bit processing apparatus of the present invention is characterized by comprising: a moving unit that holds the drill bit and moves the drill bit along a vertical direction; The light-projecting unit projects light onto the aforementioned drill bit; A light receiving unit that receives the aforementioned light; and The metering unit measures the yaw rate of the drill bit based on the light reception results.

[0008] [The effects of the invention] According to the present invention, a drill bit processing apparatus with good metering accuracy can be provided. Attached Figure Description

[0009] [ Figure 1 [1] is a diagram showing an example of the overall structure of the drill bit processing device 1.

[0010] [ Figure 2 [ ] is a diagram showing an example of the configuration of a moving unit, a light-emitting unit, a light-receiving unit, and a metering unit.

[0011] [ Figure 3 [] is a graph representing the experimental results.

[0012] [Figure 4 [] is a diagram representing an overall processing example.

[0013] [Explanation of Labels in the Attached Image] 1: Drill bit processing device 10:Printed substrate 11: Device base 12: Processing table 13: Gantry-type column 15: Horizontal sliding component 16: Shaft 17: Drill bit 18: Secondary clamp 19: Supply tool column 20: Discharge tool column 21: Drill bit box 22: Drill Bit Inspection Tool 25: Control device 26: Display Section 27: Memory Department 31:Light projection component 32: Optical receiving element. Detailed Implementation

[0014] Hereinafter, specific examples will be described with reference to the accompanying drawings. Furthermore, in the following description, the symbols shown in the drawings refer to the same elements. Also, the specific examples described below are simplified for the purpose of explanation. Therefore, embodiments of the present invention are not limited to the specific examples described below, and may also have elements other than those shown in the drawings.

[0015] [Example of the configuration of drill bit processing device 1] Figure 1 This is a diagram showing an example of the overall configuration of the drill bit processing apparatus 1. Hereinafter, the vertical direction will be designated as the "Z direction". Furthermore, the horizontal direction orthogonal to the Z-axis direction will be designated as the "Y direction". Also, the depth direction, which is orthogonal to both the Z and Y directions, will be designated as the "X direction".

[0016] As shown in the figure, the drill bit processing device 1 includes a device base 11, a processing table 12, and a gantry column 13.

[0017] The processing stage 12 is driven along the X direction on the device base 11 by an XY direction drive mechanism. For example, the printed circuit board 10, which is the work to be processed, is placed on the processing stage 12.

[0018] The gantry column 13 is mounted on the device base 11. For example, the gantry column 13 is arranged to span the processing table 12. Furthermore, a transverse slide 15 is provided on the vertical plane of the gantry column 13 and driven along the Y direction by an XY direction drive mechanism.

[0019] For example, multiple pivots 16 are provided on the horizontal slide 15.

[0020] The pivot 16 corresponds to each printed circuit board 10 disposed on the processing table 12. Furthermore, the pivot 16 is disposed in a manner that allows it to slide relative to the gantry column 13.

[0021] Multiple rotating shafts 16 are driven synchronously along the Z direction through a rotating shaft vertical drive mechanism.

[0022] A drill bit 17 is provided on the pivot 16. For example, the drill bit 17 is a tool for drilling holes in the printed circuit board 10. Also, a secondary chuck 18 is provided on the pivot 16.

[0023] The secondary chuck 18 moves together with the rotating shaft 16 along the Z direction.

[0024] On the processing table 12, a supply tool column 19, a discharge tool column 20, a drill bit box 21, and a drill bit inspector 22 are respectively arranged in sequence.

[0025] Drill bit box 21 separates and stores new drill bits from old drill bits.

[0026] The drill bit inspector 22 has the function of detecting the diameter and tip position of the drill bit 17 held by the spindle 16. Furthermore, the drill bit inspector 22 is operated by inserting the drill bit 17 from above.

[0027] The supply tool post 19, the discharge tool post 20, the drill bit box 21, and the drill bit inspector 22 are each provided near the printed circuit board 10 to be processed, corresponding to the rotating shaft 16.

[0028] As described above, in the drill bit processing apparatus 1, multiple rotating shafts 16 are mounted on the gantry column 13. Furthermore, in the drill bit processing apparatus 1, the configuration of the tool column and the like corresponding to the rotating shafts 16 increases the amount of processing per cycle. Thus, the drill bit processing apparatus 1 is a so-called multi-axis substrate drilling apparatus.

[0029] Each part of the drill bit processing device 1 is controlled by a control device 25. The control device 25 may be equipped with a processor or similar device with program control. Furthermore, a display unit 26 is connected to the control device 25. The display unit 26 displays various information transmitted to the operator.

[0030] The control device 25 includes a memory unit 27. For example, the memory unit 27 is a device for storing programs, display data, and predetermined thresholds. For example, the memory unit 27 is implemented using non-volatile memory.

[0031] Furthermore, the drill bit processing device 1 may also be a device with a configuration other than those described above. For example, the drill bit processing device 1 may be a so-called drilling machine or an NC machining machine. In addition, the drill bit processing device 1 may also be configured to have a computing device, a control device, a memory device, an input device, an output device, a communication device, or an auxiliary device internally or externally.

[0032] [Example of the configuration of the mobile unit, the light-emitting unit, the light-receiving unit, and the metering unit] Figure 2 This is a diagram showing an example of the configuration of the moving unit, the light-projecting unit, the light-receiving unit, and the metering unit. Hereinafter, a drill bit 17 and its vicinity will be enlarged and explained in the XY cross-sectional view.

[0033] For example, the moving unit is implemented via a rotating shaft 16. However, the moving unit can be any mechanism that moves the drill bit 17 along the Z direction (it may also include an actuator and a speed reducer, etc.). Specifically, the illustrated state is when the rotating shaft 16 is lowering the drill bit 17 toward the processing table 12. Thus, when the rotating shaft 16 is processing the printed circuit board 10 on the processing table 12, it lowers the drill bit 17 toward the processing table 12. On the other hand, when not processing, the rotating shaft 16 raises the drill bit 17 away from the processing table 12.

[0034] However, drill bit 17 can also have degrees of freedom in the Z direction, that is, in addition to going up and down.

[0035] For example, the light-emitting unit is implemented by a light-emitting element 31. On the other hand, for example, the light-receiving unit is implemented by a light-receiving element 32. That is, the light-emitting element 31 is a light emitter based on control of light emission. The light-receiving element 32 is a so-called light sensor or the like.

[0036] The light-emitting element 31 emits light that is received by the light-receiving element 32. On the other hand, the light-receiving element 32 receives the light emitted by the light-emitting element 31. Thus, the light-emitting element 31 and the light-receiving element 32 are arranged in pairs. Specifically, the light emitted by the light-emitting element 31 is emitted and received by the light-emitting element 31 and the light-receiving element 32 when the drill bit 17 is not lowered, that is, as long as the drill bit 17 is not located between the light-emitting element 31 and the light-receiving element 32 and there is no object blocking the light.

[0037] Furthermore, the light-emitting element 31 and the light-receiving element 32 can also be configured differently from those shown in the figure. That is, when the drill bit 17 is descending in the Z direction, the light-emitting element 31 and the light-receiving element 32 only need to be located between the drill bit 17 and the light-emitting element 32, and the light-emitting element 31 and the light-receiving element 32 need to be in a facing relationship. Also, when the drill bit 17 is descending in the Z direction, if the light emitted by the light-emitting element 31 is partially or completely blocked by the drill bit 17, then the drill bit 17, the light-emitting element 31, and the light-receiving element 32 can also be configured differently from those shown in the figure.

[0038] If the drill bit 17 is in a downward Z-direction state, then part or all of the light emitted by the light-emitting element 31 is blocked by the drill bit 17. Therefore, the amount of light received by the light-receiving element 32 changes. Hereinafter, the change in the amount of light between the upward and downward states of the drill bit 17 will be referred to as the "change".

[0039] For example, the metering unit is implemented by a control device 25, etc. That is, the control device 25 measures the amount of sway of the drill bit 17 based on the change. Furthermore, the measurement result is stored, for example, by a memory unit 27.

[0040] If drill bit 17 wobbles, the area where light is blocked increases by the amount of wobbling (e.g., wobbling along the Y direction). Therefore, the change in magnitude increases. Thus, if the change in magnitude is known, control device 25 can measure the amount of wobbling.

[0041] Furthermore, the change in diameter is ideally measured by both the light-emitting element 31 and the light-receiving element 32, which together measure the diameter of the drill bit 17. That is, the light-emitting element 31 and the light-receiving element 32 are ideally hardware components that measure both the diameter of the drill bit 17 and the change in diameter. With this configuration, there is no need for a dedicated measuring device to measure the change in diameter, thus reducing the number of components. In addition, this configuration reduces costs.

[0042] [Experimental Results] Figure 3 This is a graph representing the experimental results. In the table shown in the graph, "Tool No." is the identification number of drill bit 17. "Rotation speed" indicates the rotational speed at which drill bit 17 rotates (units include "krpm (revolutions per minute), thousands of revolutions per minute," etc.). Furthermore, "Tolerance value" is a pre-defined range of allowable runout. For example, the "tolerance value" is determined through prior experiments.

[0043] Furthermore, as shown in the figure, drill bit 17 is ideally configured with an "allowable value" that varies between 20,000 and 300,000 revolutions per minute (20 krpm to 300 krpm in the figure). Drill bit 17 is used in most cases between 20,000 and 300,000 revolutions per minute. Therefore, it is ideal to measure the runout within this range and to set the allowable value for this range.

[0044] As shown in the figure, if the change is known, the sway can be measured, just like "A〇〇". Furthermore, it can be determined whether the value of "A〇〇" is within the range of "T〇〇" preset according to each drill bit 17 and each rotation speed.

[0045] [Example of overall processing] Figure 4 This is a diagram illustrating an overall processing example. From here on, if it is marked "Start," the drill bit 17 begins to rotate, and it reaches a state where processing can proceed until it is marked "End."

[0046] In step S1, the light-emitting element 31 begins to emit light.

[0047] In step S2, the rotating shaft 16 moves the drill bit 17.

[0048] In step S3, the control device 25 measures the sway. The measurement result is then stored, for example, by the memory unit 27.

[0049] Steps S1 to S3 are, for example, Figure 2 Generally, it is executed.

[0050] In step S4, the control device 25 determines whether the measurement has ended. If the measurement has ended (yes in step S4), the control device 25 proceeds to step S5. On the other hand, if the measurement has not ended (no in step S4), the control device 25 proceeds to step S3.

[0051] For example, the measurement results are used in the processing after step S5.

[0052] In step S5, the control device 25 selects the drill bit 17 and its rotational speed. For example, the allowable value and diameter of the hole to be drilled on the printed circuit board 10 are predetermined according to specifications. In this case, the control device 25 selects a drill bit 17 and its rotational speed that are appropriate to the specifications. That is, the control device 25 selects a combination of drill bit 17 and rotational speed that is below the allowable runout amount of the specifications. After selection, the control device 25 controls the process to begin. Thus, the selection unit is implemented, for example, by the control device 25.

[0053] In step S6, the control device 25 determines whether the processing should end. If the processing is complete (yes in step S6), the control device 25 ends the overall processing. On the other hand, if the processing is not complete (no in step S6), the control device 25 proceeds to step S5.

[0054] Furthermore, the overall processing is not limited to the processes described above. For example, other processes besides those mentioned above can also be added to the overall processing.

[0055] As described above, the moving unit performs movements such as lowering the drill bit 17. Thus, in the state where the drill bit 17 is lowered, for example, as... Figure 2 As shown, the light emission unit and the light receiving unit emit and receive light. Thus, with the light emission and reception results obtained according to each rotation speed, the metering unit measures the sway of the drill bit 17 based on the light reception results.

[0056] As described above, considering the rotational speed, the runout of the drill bit 17 can be measured with high precision. Furthermore, by utilizing a configuration that measures the runout of the drill bit 17 using light, the runout of the drill bit 17 can be measured with high precision, thus providing a drill bit machining apparatus with excellent runout measurement accuracy. Moreover, after measuring the runout, the selection unit selects the drill bit 17 and the rotational speed based on the measurement result. In this way, by selecting the combination of the drill bit 17 and the rotational speed through the selection unit, hole machining within the permissible range of specifications can be performed.

[0057] [Other Embodiments] Each device may not be a single device. That is, each device may be a combination of multiple devices.

[0058] The present invention can also be implemented by executing a program (including firmware and a program thereof, hereinafter referred to as "program") for implementing the information processing method illustrated above, or a process equivalent to the processing shown above.

[0059] That is, the present invention can obtain a predetermined result by giving instructions to a computer, and can be implemented by using a program written in a programming language or the like. Furthermore, the program can also be a component that performs processing using hardware such as an IC (Integrated Circuit).

[0060] The program coordinates with the computer's arithmetic, control, and memory devices to enable the computer to perform the processes described above. That is, the program is loaded into the main memory, etc., and commands are sent to the arithmetic device to perform calculations, thereby making the computer work.

[0061] Furthermore, the program can also be provided via computer-readable recording media or telecommunications lines such as the Internet.

[0062] This invention can also be implemented by a system composed of multiple devices. That is, an information processing system composed of multiple computers can execute the above-described processes in a redundant, parallel, distributed, or combined manner. Therefore, this invention can also be implemented by devices other than those described in the hardware configuration, and by systems other than those described in the hardware configuration.

[0063] The above embodiments are illustrative of the present invention and are not intended to limit the scope of the invention to these embodiments. Those skilled in the art can make appropriate modifications without departing from the spirit of the invention.

Claims

1. A drill bit processing device, characterized in that... have: A moving unit that holds the drill bit and moves the drill bit in a vertical direction; A light-projecting unit that projects light onto the drill bit; A light receiving unit receives the light; and A metering unit that measures the yaw of the drill bit based on the received light.

2. The drill bit processing apparatus as described in claim 1, wherein, The metering unit measures the yaw rate by varying the rotational speed of the drill bit between 20,000 and 300,000 revolutions.

3. The drill bit processing apparatus as claimed in claim 1, further comprising: The selection unit selects the combination of the drill bit and the drill bit rotation speed based on the yaw rate. The light-projecting unit and the light-receiving unit It is arranged side-by-side with the drill bit in the vertical direction. With the drill bit descending in the vertical direction, the drill bit is positioned between the light-projecting unit and the light-receiving unit. The light-projecting unit and the light-receiving unit are positioned facing each other. When the drill bit is descending in the vertical direction, part or all of the light emitted by the light-emitting unit is blocked by the drill bit. The metering unit measures the yaw rate by the change in the amount of light emitted when the drill bit is descending in the vertical direction, caused by the amount of light being blocked by the drill bit.

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