Light curtain detection device and electrochemical treatment equipment

Abstract

A light curtain detection device includes a light curtain transmitting unit, a light curtain receiving unit, the light curtain receiving unit is arranged opposite to the light curtain transmitting unit, and receives the light beam emitted from the light curtain transmitting unit; and a transparent protective shell, including a first protective shell and a second protective shell respectively sealed, the light curtain transmitting unit and the light curtain receiving unit are respectively arranged inside the first protective shell and the second protective shell; a detection channel for the product to pass through is formed between the opposite surfaces of the first protective shell and the second protective shell. Compared with conventional photoelectric switches, the light curtain can detect a wider range; the transparent protective shell can reduce the probability of inaccuracy when the light curtain sensor structure is affected by external factors such as water droplets splashing.

Description

Technical Field

[0001] The invention relates to the technical field of assembly line detection, and in particular to a light curtain detection device and electrochemical processing equipment. Background Art

[0002] In the production process of the assembly line, when the semi-finished products are passed to the next process, it is usually necessary to count or detect the semi-finished products that have passed through to find out whether there are any semi-finished products that are not placed properly. The inspection process is usually as follows: a sensor is set up next to the assembly line, and the sensor detects each semi-finished product that passes through. For example, if the semi-finished product has a certain shape, the sensor will detect whether there is a semi-finished product passing through, or detect whether there is a position deviation for the semi-finished product. When the sensor detects that there is a position deviation that exceeds the predetermined range, the sensor sends a detection signal. Especially in the working conditions where the semi-finished products need to be precisely positioned and processed, once the placement of the semi-finished products is wrong, it is easy to affect the effect of the subsequent processing steps.

[0003] The sensor of the commonly used detection device is a photoelectric switch. As a type of sensor, the photoelectric switch is mainly used to identify whether there are semi-finished products to be processed passing by. However, the photoelectric switch is easily affected by the outside world. For example, when there is liquid on the surface of the photoelectric switch, light refraction is likely to occur at the location of the liquid. However, once a shell is set on the surface of the photoelectric switch, it will affect the accuracy of the photoelectric switch in detecting the semi-finished products.

[0004] In order to solve this problem, at present, the Chinese patent with patent number CN106468901A discloses a dynamic light curtain shielding system and method, which uses a light curtain to detect whether a semi-finished product passes through. When the product enters the protection area of ​​the light curtain during the shielding mode, the system identifies the highest interrupted beam, which indicates the height of the product. Then, the system sets the shielding height of the light curtain based on the highest interrupted beam. The beams above the set shielding height are not shielded, and the beams up to the set shielding height are still shielded.

[0005] The above device is mainly used to detect the height of the semi-finished product passing by, and to judge whether there is a semi-finished product placed in the correct position passing by. This device is more suitable for the detection of products placed on the conveyor belt. If it is a suspended semi-finished product, the device used to suspend the semi-finished product usually keeps the height unchanged. When passing through the light curtain, the system can identify the highest interrupted light beam, but it cannot identify whether the suspended position of the semi-finished product is correct. Summary of the invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that it is difficult to accurately detect the position of the semi-finished product, thereby providing a light curtain detection device.

[0007] A light curtain detection device, characterized by comprising:

[0008] The light curtain transmitting unit emits a unidirectional light beam;

[0009] a light curtain receiving unit, arranged opposite to the light curtain emitting unit, and receiving the light beam emitted by the light curtain emitting unit; and a transparent protective shell, comprising a first protective shell and a second protective shell, respectively sealed, wherein the light curtain emitting unit and the light curtain receiving unit are respectively arranged inside the first protective shell and the second protective shell;

[0010] A detection channel for products to pass through is formed between the opposite surfaces of the first protective shell and the second protective shell.

[0011] Furthermore, a guiding unit for guiding the product to enter the detection channel is provided on the first protective shell and / or the second protective shell at the inlet end of the detection channel.

[0012] Further, the guiding unit comprises an opening provided at the inlet end, and the opening gradually decreases along the moving direction of the product.

[0013] Further, the first protective shell and the second protective shell respectively include a first detection plane and a second detection plane, the first detection plane and the second detection plane are arranged opposite to and in parallel, and the detection channel is formed between the first detection plane and the second detection plane.

[0014] Furthermore, a guiding slope is provided on the first protective shell and / or the second protective shell at the inlet end, and the guiding slope is connected to the first detection plane and / or the second detection plane at an angle.

[0015] Furthermore, the first protective shell and the second protective shell are symmetrically arranged with the detection channel as the center.

[0016] An electrochemical treatment device, comprising:

[0017] A working tank containing a conductive solution;

[0018] A detection device, arranged upstream of the working tank in the product transport direction, the detection device being a light curtain detection device as described in any one of the above;

[0019] The electrochemical treatment device is arranged in the working tank and is located downstream of the detection device.

[0020] Further, the electrochemical treatment device is an electrolysis device, and the product is a PCB board; or, the electrochemical treatment device is an electroplating device, and the product is a PCB board.

[0021] Furthermore, it also includes a transmission unit and a fixing unit, wherein the fixing unit fixes the product, and the transmission unit drives the fixing unit to transmit the product along a transmission path, and the detection channel is located on the transmission path.

[0022] Furthermore, the light curtain detection device detects at least one side contour of the product that is not connected to the fixing unit.

[0023] The technical solution of the present invention has the following advantages:

[0024] 1. Compared with conventional photoelectric switches, the light curtain transmitting unit and the light curtain receiving unit provided by the present invention can detect a wider range, can detect products at a farther distance, and can accurately detect products within a range of 1m; the height measurement accuracy can be as accurate as 2.5mm.

[0025] 2. The transparent protective shell provided by the present invention can reduce the probability of inaccuracy when the light curtain sensor structure is affected by external factors such as splashing water droplets.

[0026] 3. The guiding slope of the protective shell provided by the present invention can facilitate the PCB board to enter the front end of the detection channel through a larger opening size when a plate-like semi-finished product such as a PCB board enters the detection channel, and then gradually introduce the PCB board into the detection channel with a narrower size through the guiding slope.

[0027] 4. The electrochemical treatment equipment provided by the present invention, because it is equipped with the above-mentioned light curtain detection device, can accurately detect whether the placement position of the PCB board is correct before the PCB board enters the treatment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a front view of the light curtain detection device;

[0030] Figure 2 It is a top view of the light curtain detection device;

[0031] Figure 3 It is a structural schematic diagram of the light curtain detection device used in conjunction with the transmission unit.

[0032] Description of reference numerals:

[0033] 1. Light curtain transmitting unit; 2. Light curtain receiving unit; 3. Protective shell; 31. First protective shell; 311. First detection plane; 312. Second detection plane; 32. Second protective shell; 33. Guide slope; 4. Detection channel; 5. Guide unit; 6. Transmission unit; 7. Fixing unit. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Example

[0038] An electrochemical treatment device includes a working tank, a conductive solution is contained in the working tank, an electrochemical treatment device immersed in the electrolyte is arranged in the working tank, the electrochemical treatment device includes a cathode plate and an anode plate, wherein the electrochemical treatment device in this embodiment can be an electrolytic device or an electroplating device, when it is an electrolytic device, the electrochemical treatment device is an electrolytic device, the working tank is an electrolytic tank, the electrolytic solution is contained in the working tank, the cathode plate and the anode plate are energized to realize the electrolytic reaction; when it is an electroplating device, the electrochemical treatment device is an electroplating device, the working tank is an electroplating tank, the electroplating solution is contained in the electroplating tank, the cathode plate and the anode plate are energized to realize the electroplating reaction. A detection device and a working tank are sequentially arranged along the transportation direction of the semi-finished PCB board.

[0039] like Figure 3 As shown, the electrochemical treatment equipment includes a transmission unit 6 and a fixing unit 7. The transmission of the PCB board is realized by the transmission unit 6 and the fixing unit 7. The fixing unit 7 fixes the PCB board, and the transmission unit 6 drives the fixing unit 7 to transmit the PCB board along the transmission path, wherein the detection channel 4 is located on the transmission path. The fixing unit 7 in this embodiment is an electroplating clamp; the transmission unit 6 drives the electroplating clamp to transmit the PCB board along the transmission path, and drives the PCB board to pass through the detection channel 4. The transmission unit 6 includes a belt drive or a chain drive structure, and the motor fixed on the external frame drives the transmission belt or the transmission chain, and the electroplating clamp is fixed on the transmission belt or the transmission chain, and the movement of the transmission belt or the transmission chain drives the movement of the PCB board.

[0040] The detection device of this embodiment is a light curtain detection device, the working tank is located downstream of the light curtain detection device, and the light curtain detection device at least detects the contour of any side of the product that is not connected to the electroplating clamp. The PCB board detected by the light curtain detection device enters the working tank and reacts.

[0041] like Figure 1 As shown, the light curtain detection device of this embodiment includes: a light curtain transmitting unit 1 and a light curtain receiving unit 2 for receiving the unidirectional light beam emitted by the light curtain transmitting unit 1. The light curtain transmitting unit 1 and the light curtain receiving unit 2 are both configured as two vertical rod-shaped structures, which are arranged opposite to each other. The surface where the unidirectional light beam is located is perpendicular to the surface where the PCB board is located. It should be noted that the light curtain transmitting unit 1 and the light curtain receiving unit 2 are arranged at the same time. Figure 1 The positions in can be interchanged.

[0042] like Figure 1 and 2 As shown, a protective shell 3 is provided outside the light curtain transmitting unit 1 and the light curtain receiving unit 2. The protective shell 3 is made of a transparent material, and the protective shell 3 seals and protects the light curtain transmitting unit 1 and the light curtain receiving unit 2. The sealing method that can be adopted is: gluing the edge of the protective shell 3 to the external wall, or tightening it with screws and embedding the sealing strip in the gap between the protective shell 3 and the external wall.

[0043] like Figure 1 and 2As shown, the protective shell 3 is divided into a first protective shell 31 and a second protective shell 32 respectively covering the light curtain emitting unit 1 and the light curtain receiving unit 2, and the cross-sectional shape of the first protective shell 31 and the second protective shell 32 is the same (the cross-sectional shape refers to the cross-sectional shape of the plane perpendicular to the PCB board). A detection channel 4 for the product to pass through is formed between the opposite surfaces of the first protective shell 31 and the second protective shell 32, and the first protective shell 31 and the second protective shell 32 are symmetrically arranged with the detection channel 4 as the center. Specifically, the detection channel 4 is a channel formed between the first detection plane 311 and the second detection plane 312 opposite to each other on the first protective shell 31 and the second protective shell 32, wherein the first detection plane 311 and the second detection plane 312 are arranged opposite and parallel to each other, and the light curtain emitting unit 1 and the light curtain receiving unit 2 are arranged close to the inner walls of the first detection plane 311 and the second detection plane 312 of the detection channel 4, respectively.

[0044] The first protective shell 31 and the second protective shell 32 form a wedge-shaped guide unit 5 at the inlet end to guide the product into the detection channel 4. The guide unit 5 includes an opening at the inlet end, wherein the opening gradually decreases along the moving direction of the product. Figure 2 , a guiding bevel 33 is provided at the entrance end of the first protective shell 31 and / or the second protective shell 32, and the guiding bevel 33 is connected to the first detection plane 311 or the second detection plane 312 at an angle. That is, the guiding bevel 33 can be set at the entrance of the first protective shell 31, or at the entrance of the second protective shell 32, or at the entrance of the first protective shell 31 and the second protective shell 32 at the same time. In this embodiment, a structure in which guiding bevels 33 are provided on both the first protective shell 31 and the second protective shell 32 is adopted. The guiding unit 5 is formed between the two guiding bevels 33, that is, the guiding bevel 33 on the first protective shell 31 is transitionally connected to the first detection plane 311 at an angle, and the guiding bevel 33 on the second protective shell 32 is transitionally connected to the second detection plane 312 at an angle. The end with the smaller opening of the guide unit 5 is connected to the detection channel 4, and the end with the larger opening is the entry end of the PCB board. This end with the larger opening is the opening at the entrance end of the guide unit 5, and the opening gradually decreases along the moving direction of the product, so that the PCB board enters the guide unit 5 and then enters the detection channel 4.

[0045] The working process of the embodiment of the present invention is as follows:

[0046] The PCB board is clamped on the electroplating clamp, enters the detection channel 4 through the guide unit 5 and passes through the light curtain detection device, which checks whether the clamped position is correct; the light curtain receiving unit 2 receives the unidirectional light beam emitted by the light curtain transmitting unit 1, and determines the position of the PCB board corresponding to the blocked light beam by detecting the position of the unidirectional light beam, such as the inversion of the length and width of the PCB board or the tilt caused by the loose clamping part. Once these situations occur, the light curtain detection device sends a signal and transmits it to the control center such as the computer to remind the operator to adjust the clamped PCB board.

[0047] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. An electrochemical treatment device, characterized in that include: A working tank containing a conductive solution; A detection device, arranged upstream of the working tank in the product transport direction; an electrochemical treatment device, disposed in the working tank and downstream of the detection device; A transmission unit (6) and a fixing unit (7), wherein the fixing unit (7) fixes the product, and the transmission unit (6) drives the fixing unit (7) to transmit the product along a transmission path, and the detection channel (4) is located on the transmission path; The detection device at least detects the contour of any side of the product that is not connected to the fixing unit (7); The detection device comprises: A light curtain transmitting unit (1) emits a unidirectional light beam; A light curtain receiving unit (2) is arranged opposite to the light curtain emitting unit (1) and receives the light beam emitted by the light curtain emitting unit (1); and a transparent protective shell (3) comprises a first protective shell (31) and a second protective shell (32) which are respectively sealed, and the light curtain emitting unit (1) and the light curtain receiving unit (2) are respectively arranged inside the first protective shell (31) and the second protective shell (32); A detection channel (4) for the product to pass through is formed between the opposing surfaces of the first protective shell (31) and the second protective shell (32); A guiding unit (5) for guiding the product to enter the detection channel (4) is provided on the first protective shell (31) and / or the second protective shell (32) at the entrance end of the detection channel (4); The electrochemical treatment device is an electrolysis device, and the product is a PCB board; or, the electrochemical treatment device is an electroplating device, and the product is a PCB board.

2. The electrochemical treatment device according to claim 1, characterized in that: The guide unit (5) comprises an opening arranged at the inlet end, and the opening gradually decreases along the moving direction of the product.

3. The electrochemical treatment device according to claim 2, characterized in that: The first protective shell (31) and the second protective shell (32) respectively include a first detection plane (311) and a second detection plane (312); the first detection plane (311) and the second detection plane (312) are arranged opposite to and in parallel with each other; and the detection channel (4) is formed between the first detection plane (311) and the second detection plane (312).

4. The electrochemical treatment device according to claim 3, characterized in that: A guiding slope (33) is provided on the first protective shell (31) and / or the second protective shell (32) at the inlet end, and the guiding slope (33) is connected to the first detection plane (311) and / or the second detection plane (312) at an angle.

5. The electrochemical treatment device according to any one of claims 1 to 4, characterized in that: The first protective shell (31) and the second protective shell (32) are symmetrically arranged with the detection channel (4) as the center.

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