Deflection detection device and PCB processing equipment

Abstract

The utility model belongs to the technical field of deflection detection, and particularly relates to a deflection detection device and PCB processing equipment. The deflection detection device comprises a deflection rod, a deflection instrument and a data processing module, the deflection rod is installed on a main shaft rotor of a main shaft of the PCB processing equipment, the deflection instrument comprises a deflection instrument body, an emitter and a receiver, the emitter and the receiver are arranged on the deflection instrument body, and the receiver is used for receiving signals emitted by the emitter; the deflection rod is located between the transmitter and the receiver in the first direction, when the deflection rod rotates along with the spindle rotor, signals between the receiver and the transmitter can be partially or completely shielded, waveform changes of the frequency and the like of the signals are caused by signal shielding, the receiver transmits the received signals to the data processing module, and the data processing module processes the signals. And the data processing module converts the optical signal into an electric signal, and calculates a main shaft deflection value and a main shaft rotating speed value according to the waveform change of the current signal, so that high-precision detection of deflection and rotating speed of the main shaft can be realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of deflection detection, in particular to a deflection detection device and PCB processing equipment. Background Art

[0002] The diameter of microvias in printed circuit boards (PCBs) is shrinking, and the quality requirements for these microvias are becoming increasingly demanding. During drilling, the spindle of the PCB processing equipment rotates at high speeds. If the spindle deflects, the drill bit it holds will also deflect, directly affecting the quality of the drilled hole. Severe deflection can render the PCB scrapped.

[0003] Although the machine tool of PCB processing equipment itself has a runout detection function, the runout data tested by the tool probe is less accurate, affecting the detection accuracy. Utility Model Content

[0004] The technical problem to be solved by the utility model is: to provide a deflection detection device and PCB processing equipment in view of the problem that the existing deflection data has low accuracy.

[0005] To solve the above technical problems, on the one hand, an embodiment of the present utility model provides a runout detection device, comprising a runout rod, a runout meter, and a data processing module. The runout rod is mounted on a spindle rotor of a spindle of a PCB processing device. The runout meter comprises a runout meter body, and a transmitter and a receiver provided on the runout meter body. The receiver is configured to receive an optical signal transmitted by the transmitter.

[0006] The yaw rod is located between the transmitter and the receiver in a first direction. When the yaw rod rotates with the spindle rotor, it can partially or completely block the optical signal between the receiver and the transmitter. The receiver is electrically connected to the data processing module, and the data processing module is used to process the signal output by the receiver.

[0007] Optionally, a detection hole is provided on the yaw meter body, and the transmitter and the receiver are installed on opposite sides of a hole wall of the detection hole along the first direction;

[0008] The deflection rod can move back and forth along the second direction with the main axis to be inserted into or removed from the detection hole; when the deflection rod is inserted into the detection hole, it can partially or completely block the signal between the receiver and the transmitter; wherein the first direction and the second direction are not parallel and do not overlap.

[0009] Optionally, the deflection rod is cylindrical.

[0010] Optionally, the receiver includes a first receiver and a second receiver, both of which can receive the signal transmitted by the transmitter, and the first receiver and the second receiver are arranged at intervals along a third direction; wherein the first direction intersects with the third direction.

[0011] Optionally, the distance between the transmitter and the first receiver is equal to the distance between the transmitter and the second receiver.

[0012] Optionally, it further includes a power supply module and a control system, the power supply module is electrically connected between the control system and the transmitter, and the data processing module is electrically connected to the control system.

[0013] Optionally, a communication module and a display module are further included, and both the communication module and the display module are electrically connected to the control system.

[0014] Optionally, a storage module is further included, and the storage module is electrically connected to the control system.

[0015] Optionally, a yaw rod box for temporarily placing the yaw rod is further included, and the yaw rod box is installed on the yaw instrument body or a workbench of PCB processing equipment.

[0016] On the other hand, an embodiment of the utility model provides a PCB processing equipment, including a spindle, a worktable, a beam, a beam base, a bed and the deflection detection device as described above, wherein the beam is fixed to the bed through the beam base, and a channel for movement of the worktable is formed between the beam base, the bed and the beam, and the deflection meter body is installed on the worktable.

[0017] In the deflection detection device provided by the embodiment of the present invention, when the transmitter transmits a signal, the signal received by the receiver will be blocked or connected during the rotation of the deflection rod. The blocking of the signal causes the waveform of the signal frequency and the like to change. The receiver transmits the received signal to the data processing module, and the data processing module converts the optical signal into an electrical signal. The spindle deflection value and the spindle speed value are calculated according to the waveform change of the current signal, thereby realizing high-precision and efficient detection of the spindle deflection and speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 This is a schematic diagram of a deflection detection device provided by an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of a PCB processing device provided by an embodiment of the present utility model;

[0021] Figure 3 yes Figure 2 Enlarged schematic diagram of point A in the middle.

[0022] The reference numerals in the specification are as follows:

[0023] 1. Deflection rod; 2. Deflection instrument; 21. Deflection instrument body; 211. Detection hole; 212. Deflection rod box; 22. Transmitter; 23. Receiver; 31. Data processing module; 32. Power module; 33. Control system; 34. Communication module; 35. Display module; 36. Storage module; 4. Spindle; 41. Spindle rotor; 5. Workbench; 6. Crossbeam; 7. Crossbeam base; 8. Bed;

[0024] a. First direction; b. Second direction; c. Third direction. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] like Figures 1 to 3 As shown, an embodiment of the present invention provides a yaw detection device, including a yaw rod 1, a yaw meter 2 and a data processing module 31. The yaw rod 1 is installed on the spindle rotor 41 of the spindle 4 of the PCB processing equipment. The spindle rotor 41 can drive the yaw rod 1 to rotate. The yaw meter 2 includes a yaw meter body 21, and a transmitter 22 and a receiver 23 arranged on the yaw meter body 21. The receiver 23 is used to receive the optical signal emitted by the transmitter 22, and a path is formed between the transmitter 22 and the receiver 23.

[0027] The yaw rod 1 is located between the transmitter 22 and the receiver 23 in the first direction. When the yaw rod 1 rotates with the spindle rotor 41, it can partially or completely block the optical signal between the receiver 23 and the transmitter 22. The receiver 23 is electrically connected to the data processing module 31, and the data processing module 31 is used to process the signal output by the receiver 23.

[0028] Specifically, when performing runout detection, the spindle chuck on the spindle rotor 41 clamps the runout rod 1. When the transmitter 22 transmits a light signal, the light signal received by the receiver 23 will be blocked or connected during the rotation of the runout rod 1. The blocking of the light signal causes the frequency of the light signal and other waveforms to change. The receiver 23 transmits the received signal to the data processing module 31. The data processing module 31 converts the light signal into an electrical signal, and calculates the spindle runout value and the spindle speed value based on the waveform change of the current signal, thereby achieving high-precision and efficient detection of the runout and speed of the spindle 4.

[0029] Since the tool surface is relatively complex, using the tool directly for runout detection will increase the difficulty of converting and calculating the photoelectric signal. In addition, the tool diameter is very small, and the poor straightness of the tool itself will also cause a large deviation in the spindle runout value, which cannot accurately reflect the runout of the spindle 4. In this embodiment, a standard-shaped runout rod 1 is used to avoid detection errors caused by the tool itself.

[0030] Furthermore, when the main shaft 4 has no deflection, the signal received by the receiver 23 does not change significantly during the process of the deflection rod 1 rotating following the main shaft rotor 41. When the main shaft 4 has deflection, when the deflection rod 1 rotates to different positions, the blocking area of ​​the deflection rod 1 on the receiver 23 is different, and a current signal with a changing waveform can be obtained, so that the data processing module 31 calculates the deflection value according to the amplitude of the current signal waveform.

[0031] In one embodiment, transmitter 22 is a light transmitter, and receiver 23 is a light receiver. The light signal emitted by transmitter 22 is not limited to infrared light, laser light, or laser light. When spindle 4 deflects, the light is blocked by deflection rod 1, causing the frequency or level of the light to change in waveform. This is used to determine whether deflection has occurred, and the deflection value is calculated by data processing module 31.

[0032] In one embodiment, a detection hole 211 is provided in the yaw meter body 21, and a transmitter 22 and a receiver 23 are mounted on opposite sides of the detection hole 211 along a first direction a. The yaw rod 1 can reciprocate along a second direction b with the spindle 4 to be inserted into or removed from the detection hole 211.

[0033] When the deflection of the main shaft 4 needs to be detected, the main shaft 4 drives the deflection rod 1 to be inserted into the detection hole 211, so that the deflection rod 1 is located between the transmitter 22 and the receiver 23 in the first direction a. When the deflection rod 1 is inserted into the detection hole 211, it can partially or completely block the signal between the receiver 23 and the transmitter 22; the first direction a and the second direction b are not parallel and do not overlap.

[0034] The transmitter 22 and the receiver 23 are arranged in the circular hole, which can provide a stable signal transmission path, control the signal transmission range, and reduce external interference.

[0035] The first direction a is perpendicular to the second direction b. With the worktable 5 on which the spindle 4 is mounted as a reference, the first direction is the X direction, and the second direction is the Z direction. When the yaw rod 1 is inserted into the detection hole 211, the yaw rod 1 moves downward along the second direction with the spindle 4 into the detection hole 211, and then the spindle rotor 41 drives the yaw rod 1 to rotate. Alternatively, after the yaw rod 1 is installed in the spindle rotor 41, the spindle rotor 41 then drives the yaw rod 1 to rotate, and the yaw rod 1 then moves along the second direction with the spindle 4 into the detection hole 211. Both methods are acceptable and have no effect on the detection results.

[0036] In one embodiment, the shape of the detection hole 211 can be circular, square or other polygonal, and the cross-sectional area of ​​the detection hole 211 in the first direction is larger than the cross-sectional area of ​​the deflection rod 1 in the first direction, ensuring the rotation range of the deflection rod 1 in the detection hole 211.

[0037] In one embodiment, when the yaw rod 1 is inserted into the detection hole 211, the yaw rod 1 is located in the middle position of the detection hole 211, and the spindle rotor 41 can automatically clamp and place the yaw rod 1, avoiding the operation of manually aligning the yaw rod 1 with the detection hole 211 on the yaw instrument body 21 during yaw detection. No manual adjustment is required, which greatly simplifies the detection operation and realizes the automatic detection function of the spindle yaw.

[0038] In one embodiment, the deflection rod 1 is cylindrical, so that the deflection rod 1 has good straightness, can truly reflect the deflection of the main shaft 4, reduce the deflection detection error caused by the shape of the deflection rod 1, and ensure high detection accuracy.

[0039] In one embodiment, the receiver 23 includes a first receiver and a second receiver, both of which are capable of receiving signals transmitted by the transmitter 22. In a first direction, the transmitter 22 is located on one side of the deflection rod 1, and the first receiver and the second receiver are located on the other side of the deflection rod 1. The first receiver and the second receiver are spaced apart along a third direction; wherein the first direction intersects the third direction. Preferably, the first direction is perpendicular to the third direction, and the third direction is the Y direction.

[0040] The transmission signal of the transmitter 22 has a certain range. As the yaw rod 1 rotates, within a certain range, the yaw rod 1 can block at least part of the first receiver, and within other ranges, the yaw rod 1 can block at least part of the second receiver. When the main shaft 4 has no yaw, according to the positions of the first receiver and the second receiver, during the rotation of the yaw rod 1, at least one of the first receiver and the second receiver is blocked or not blocked, the signal frequency of the first receiver does not undergo waveform changes, and the signal frequency of the second receiver does not undergo waveform changes.

[0041] When the main shaft 4 deflects, the deflection rod 1 blocks different areas of the first receiver and the second receiver. The first receiver and the second receiver can absorb different amounts of light and generate currents of different sizes. When the deflection rod 1 rotates one circle, the current difference between the first receiver and the second receiver changes in a waveform. The main shaft deflection value can be calculated based on the amplitude of the current signal waveform, and the rotational speed of the main shaft 4 can be calculated based on the waveform period.

[0042] In one embodiment, the first receiver and the second receiver are photodiodes.

[0043] In one embodiment, the distance between the transmitter 22 and the first receiver is equal to the distance between the transmitter 22 and the second receiver, so that the first receiver and the second receiver are symmetrically arranged about the deflection rod 1 in the third direction.

[0044] When spindle 4 is not deflecting, the first and second receivers are blocked by the same area of ​​​​the deflection rod 1. The first and second receivers absorb the same amount of light and generate the same current. Data processing module 31 calculates the result of no deflection. When spindle 4 is deflecting, the first and second receivers absorb different amounts of light and generate different currents. When the deflection rod 1 rotates one circle, the current difference between the first and second receivers is nearly sinusoidal, which facilitates the calculation of the deflection value and rotation speed based on the waveform changes of the current signal.

[0045] In one embodiment, the deflection detection device further includes a power module 32 and a control system 33 . The power module 32 is electrically connected between the control system and the transmitter 22 , and the data processing module 31 is electrically connected to the control system. The power module 32 is used to power the transmitter 22 .

[0046] When the control system 33 issues a command for spindle runout detection, the power module 32 is connected to the transmitter 22 of the runout meter 2, and the transmitter 22 sends a light signal. After the spindle chuck of the spindle rotor 41 clamps the runout rod 1, the spindle rotor 41 starts to rotate, and moves the spindle 4 to above the runout meter 2. Thereafter, the spindle 4 moves downward along the second direction, and extends the runout rod 1 into the detection hole 211. After reaching the detection position, it stops moving. After the spindle rotor 41 reaches the set speed, the receiver 23 transmits the received light signal to the data processing module 31. The data processing module 31 converts the light signal into an electrical signal, and calculates the runout value and the spindle speed according to the waveform changes of the electrical signal.

[0047] In one embodiment, the deflection detection device further includes a communication module 34 and a display module 35 , and both the communication module 34 and the display module 35 are electrically connected to the control system 33 .

[0048] The data processing module 31 calculates the spindle runout and spindle speed and outputs them to the control system 33. The control system 33 determines whether the current spindle runout is within the required range and whether the spindle speed is consistent with the set speed. Finally, the control system 33 transmits the measured data to the display module 35 via the communication module 34 and displays the results on the display module 35, providing an alarm prompt for abnormal spindle runout and speed. The display module 35 is located on the PC terminal.

[0049] If the current runout value of the spindle 4 is within the required range and the rotational speed is consistent with the set rotational speed, the runout value and the rotational speed value are displayed on the display module 35 , and a green “Pass” is displayed on the display module 35 .

[0050] If the yaw value of the current spindle 4 is not within the required range, or the rotational speed is inconsistent with the set rotational speed, the yaw value and the rotational speed value are displayed on the display module 35 , and the display module 35 displays a red “Fail”.

[0051] In one embodiment, the runout detection device further includes a storage module 36 electrically connected to the control system 33. The data processing module 31 outputs the calculated spindle runout value and spindle speed information to the control system 33 and stores them in the storage module 36.

[0052] Furthermore, the spindle runout and speed information stored in the storage module 36 can be summarized into a report through the data processing module 31, and the original spindle runout detection on a monthly / quarterly / annual basis can be changed to a spindle runout detection cycle that the user can set according to their own needs, such as setting it to detect the runout every time the machine is turned on, detect the runout for each processing batch, or detect the runout at regular intervals, so as to prevent abnormalities of the spindle 4 in a timely manner, reduce the production scrap rate, and facilitate managers to control the status of PCB processing equipment.

[0053] In one embodiment, the deflection detection device further includes a deflection rod box 212 for temporarily placing the deflection rod 1. The deflection rod box 212 is mounted on the deflection instrument body 21 or on the workbench 5 of the PCB processing equipment. The deflection rod box 212 facilitates the timely removal and placement of the deflection rod 1 by the spindle 4. When the deflection rod box 212 is mounted on the deflection instrument body 21, the deflection rod box 212 is a receiving hole provided in the deflection instrument body 21, into which the deflection rod 1 can be inserted.

[0054] After the control system 33 issues a yaw detection command, the spindle chuck of the spindle rotor 41 clamps the yaw rod 1 in the yaw rod box 212. After the detection is completed, the spindle chuck releases the yaw rod 1 and puts the yaw rod 1 back into the yaw rod box 212.

[0055] In the present invention, the process of spindle runout detection is as follows:

[0056] Step S1: the control system 33 issues a spindle runout detection command;

[0057] Step S2: The power module 32 is connected to the transmitter 22 of the yaw meter 2, and the transmitter 22 emits an optical signal;

[0058] Step S3: The spindle 4 moves to the position of the yaw rod box 212, and the spindle chuck of the spindle rotor 41 clamps the yaw rod 1. At this time, the spindle rotor 41 starts to rotate, and then the spindle 4 moves to just above the detection hole 211. The spindle 4 then moves downward, and the yaw rod 1 is inserted into the detection hole 211. The spindle 4 stops moving after reaching the detection position.

[0059] Step S4: After the spindle rotor 41 reaches the rotation speed set by the system, the optical receiver 23 of the yaw meter 2 transmits the received optical signal to the data processing module 31;

[0060] Step S5: the data processing module 31 converts the optical signal into a current signal, and calculates the spindle runout value and the rotational speed value according to the waveform change of the current signal;

[0061] Step S6: the data processing module 31 outputs the calculated spindle runout and speed information to the control system 33 and stores it in the storage module 36;

[0062] Step S7: The control system 33 determines whether the current spindle runout value is within the required range, and determines whether the rotational speed is consistent with the set rotational speed;

[0063] Step S8: If the current spindle runout value is within the required range and the rotational speed is consistent with the set rotational speed, the runout value and the rotational speed value are displayed on the display module 35, and a green "Pass" is displayed, and then step S10 is executed;

[0064] Step S9: If the current spindle runout value is not within the required range, or the speed is inconsistent with the set speed, the runout value and the speed value are displayed on the display module 35, and a red "Fail" is displayed, and then step S10 is executed;

[0065] Step S10: the control system 33 sends a signal to shut down the transmitter 22, disconnecting the power input of the transmitter 22;

[0066] Step S11: the spindle rotor 41 stops rotating, the spindle 4 is lifted and moved to the position of the yaw bar box 212, the standard yaw bar 1 is released, and is put back into the yaw bar box 212, and the detection is completed.

[0067] On the other hand, an embodiment of the present invention provides a PCB processing equipment, including a spindle 4, a worktable 5, a beam 6, a beam base 7, a bed 8 and the deflection detection device of the above embodiment. The beam 6 is fixed above the bed 8 through the beam base 7 to form a gantry structure. The beam base 7 is connected between the bed 8 and the beam 6, so that a channel for moving the worktable 5 is formed between the beam base 7 and the bed 8 and the beam 6. During the processing, the worktable 5 can move along the third direction c in the channel to adapt to different processing requirements. The PCB processing equipment also includes a first-direction linear motor, a third-direction linear motor and a second-direction linear motor (the linear motor, guide rail and slider are used in combination and are not shown in the figure). The third-direction linear motor is arranged on the upper surface of the bed 8, the workbench 5 is connected to the top of the third-direction linear motor, and the PCB board is arranged on the workbench 5. The third-direction linear motor can drive the workbench 5 to move and drive the PCB board to move forward and backward along the third direction under the beam 6; the first-direction linear motor is arranged on the beam, the second-direction linear motor is connected to the front of the first-direction linear motor, and the spindle 4 is connected to the second-direction linear motor. The first-direction linear motor can drive the second-direction linear motor and the spindle 4 to move left and right along the first direction, and the second-direction linear motor can drive the spindle 4 to move up and down along the second direction. In the present invention, the spindle 4, the first direction linear motor, the third direction linear motor and the second direction linear motor are existing technologies. The spindle 4 is connected to the second direction linear motor. The tool on the spindle 4 can rotate at high speed. The PCB board is set on the workbench 5. The spindle 4 is driven by the third direction linear motor and the first direction linear motor to move forward and backward and left and right for high-speed and high-precision feed positioning. The high-speed rotating spindle 4 is driven by the second direction linear motor to move down and up at high speed, so that the tool on the spindle 4 can process the PCB board placed on the workbench 5.

[0068] The deflection meter body 21 is installed on the workbench 5. Furthermore, the deflection meter body 21 is fixed at a corner of the workbench 5, does not occupy the drilling work area of ​​the workbench 5, and allows the deflection rod 1 to enter the center position of the detection hole 211 during each test. No manual adjustment is required, and the detection accuracy is guaranteed to be unaffected by the detection position. The deflection detection process is simple, and the automatic detection function of the spindle deflection and speed is realized.

[0069] The control system 33, storage module 36, power module 32, display module 35 and data processing module 31 on the deflection detection device can be shared with the control system, storage module, power module, display module and data processing module of the machine tool PCB processing equipment, eliminating the need for a separate external power supply and display, thereby saving costs.

[0070] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A deflection detection device, characterized in that: It includes a yaw rod, a yaw meter and a data processing module, wherein the yaw rod is installed on the spindle rotor of the spindle of the PCB processing equipment, and the yaw meter includes a yaw meter body, and a transmitter and a receiver arranged on the yaw meter body, wherein the receiver is used to receive the optical signal emitted by the transmitter; The yaw rod is located between the transmitter and the receiver in a first direction. When the yaw rod rotates with the spindle rotor, it can partially or completely block the optical signal between the receiver and the transmitter. The receiver is electrically connected to the data processing module, and the data processing module is used to process the signal output by the receiver.

2. The deflection detection device according to claim 1, wherein: A detection hole is provided on the deflection meter body, and the transmitter and the receiver are installed on opposite sides of the hole wall of the detection hole along the first direction; The deflection rod can move back and forth along the second direction with the main axis to be inserted into or removed from the detection hole; when the deflection rod is inserted into the detection hole, it can partially or completely block the signal between the receiver and the transmitter; wherein the first direction and the second direction are not parallel and do not overlap.

3. The deflection detection device according to claim 1, wherein: The deflection rod is cylindrical.

4. The deflection detection device according to claim 1, wherein: The receiver includes a first receiver and a second receiver, both of which can receive the signal transmitted by the transmitter, and the first receiver and the second receiver are arranged at intervals along a third direction; wherein the first direction intersects with the third direction.

5. The deflection detection device according to claim 4, wherein: The distance between the transmitter and the first receiver is equal to the distance between the transmitter and the second receiver.

6. The deflection detection device according to any one of claims 1 to 5, characterized in that: It also includes a power supply module and a control system. The power supply module is electrically connected between the control system and the transmitter, and the data processing module is electrically connected to the control system.

7. The deflection detection device according to claim 6, wherein: It also includes a communication module and a display module, and both the communication module and the display module are electrically connected to the control system.

8. The deflection detection device according to claim 6, wherein: It also includes a storage module, which is electrically connected to the control system.

9. The deflection detection device according to claim 1, wherein: It also includes a yaw rod box for temporarily placing the yaw rod, and the yaw rod box is installed on the yaw instrument body or the workbench of PCB processing equipment.

10. A PCB processing equipment, characterized in that, It includes a spindle, a workbench, a beam, a beam base, a bed and the deflection detection device according to any one of claims 1 to 9, the beam is fixed to the bed through the beam base, a channel for the movement of the workbench is formed between the beam base, the bed and the beam, and the deflection meter body is installed on the workbench.

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