Computer circuit board processing and fixing device

Abstract

The invention belongs to the technical field of integrated printed circuit board processing, and particularly relates to a computer circuit board processing and fixing device which comprises a base, fixing seats are fixedly arranged on the two sides of the top of the base, electric push rods are fixedly arranged on the side walls of the two fixing seats, and circuit board clamping plates are fixedly arranged at the moving ends of the two electric push rods. A circuit board body is arranged between the two circuit board clamping plates, and the circuit board extrusion force feedback mechanism is arranged on the outer side wall of the circuit board body. The circuit board body can be clamped and fixed, the circuit board body cannot be extruded and damaged, meanwhile, the cleanliness of the surface of the circuit board body can be automatically detected, if dust exists, automatic cleaning is carried out, in addition, whether a copper foil on the surface of the circuit board is completely dissolved or not can be automatically detected, and the working efficiency is improved. And a worker does not need to inspect or estimate the etching time through vision, so that the etching precision and efficiency are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of integrated printed circuit board processing, and in particular relates to a computer circuit board processing and fixing device. Background Art

[0002] The computer integrated printed circuit board is a key part of the computer. It provides electrical connection, mechanical support and signal transmission functions for electronic components, so that various computer components can work together. During the etching process of the computer integrated printed circuit board, if the integrated printed circuit board is not fixed properly, it may be displaced, resulting in inaccurate etching patterns. Therefore, a processing fixture is required. For example, the announcement number: CN218851053U discloses a computer circuit board processing fixture.

[0003] Traditional computer integrated printed circuit board fixtures usually use mechanical clamps to achieve the fixing function. However, this fixing method has certain defects: the clamping force of the mechanical clamp is difficult to control accurately. When the clamping external force exceeds the limit that the circuit board can withstand, it will cause serious damage to the circuit board. For example, excessive external force may cause cracks and delamination in the substrate material of the circuit board, which will greatly affect the electrical performance of the circuit board or even directly scrap it. In addition, the purpose of etching the integrated printed circuit board is mainly to dissolve the excess copper foil. However, currently, manual visual inspection or etching time estimation is mostly used to determine whether the excess copper foil is completely etched. Manual visual inspection is easily affected by subjective factors and visual errors. It is difficult to accurately match the estimated etching time with the actual etching process. Both cannot accurately determine whether the copper foil is completely dissolved, which will cause short circuits in the integrated printed circuit board or interfere with other circuits.

[0004] Therefore, a computer circuit board processing and fixing device is proposed. Summary of the invention

[0005] The object of the present invention is to provide a computer circuit board processing and fixing device in view of the above problems.

[0006] To achieve the above object, the present invention adopts the following technical solutions: a computer circuit board processing and fixing device, comprising a base, both sides of the top of the base are fixed with fixing seats, the side walls of the two fixing seats are fixed with electric push rods, the moving ends of the two electric push rods are fixed with circuit board clamping plates, a circuit board body is arranged between the two circuit board clamping plates, and also includes: A circuit board extrusion force feedback mechanism is arranged on the outer side wall of the circuit board body, and the circuit board extrusion force feedback mechanism is arranged in contact with the side wall of the circuit board clamping plate; An optical reflectivity detection mechanism is arranged above the circuit board body, and a rotating shaft is fixedly provided on one side of the optical reflectivity detection mechanism, and a reciprocating rotating mechanism is provided between the lower end of the rotating shaft and the top of the base; An air blowing and dust removal mechanism is fixedly arranged on the top of one of the fixing seats, and the air blowing and dust removal mechanism is arranged toward the upper surface of the circuit board body; An air suction filter mechanism is fixedly arranged on the top of another of the fixing seats, and the air suction filter mechanism is arranged toward the upper surface of the circuit board body; A PLC controller is fixedly arranged on one side of the top of the base, and the electric push rod, circuit board extrusion force adjustment mechanism, optical reflectivity detection mechanism, reciprocating rotation mechanism, air blowing and dust removal mechanism and air suction and filtering mechanism are all electrically connected to the PLC controller.

[0007] Preferably, the circuit board extrusion force feedback mechanism includes two metal foil strain gauges, and the two metal foil strain gauges are respectively attached to both sides of the circuit board body, and a first L-shaped placement plate and a second L-shaped placement plate are symmetrically arranged between the two metal foil strain gauges, and a magnetic adsorption mechanism is provided between the first L-shaped placement plate and the second L-shaped placement plate, and a connecting rod is fixed between the two first L-shaped placement plates and between the two second L-shaped placement plates, and two lifting plates are symmetrically fixed on the top of the base, and the two lifting plates respectively lift the first L-shaped placement plate and the second L-shaped placement plate.

[0008] Preferably, the magnetic adsorption mechanism includes a connecting plate fixedly arranged on the side wall of the first L-shaped placing plate, one side of the connecting plate extends to the interior of the second L-shaped placing plate, and a first permanent magnetic column is fixedly arranged on one side of the connecting plate, and a second permanent magnetic column magnetically adsorbed with the first permanent magnetic column is fixedly arranged inside the second L-shaped placing plate.

[0009] Preferably, the optical reflectivity detection mechanism comprises a reflectivity measuring instrument, an electric slide rail is fixedly provided on the upper end of the rotating shaft, an electric slider is provided inside the electric slide rail, and the reflectivity measuring instrument is fixedly installed on the bottom of the electric slider.

[0010] Preferably, the reciprocating rotating mechanism includes a rotating motor fixedly arranged on the top of the base, a pinion is fixedly arranged on the output shaft of the rotating motor, a large gear is fixedly arranged on the shaft wall of the rotating shaft, the pinion is meshed with the large gear, a protective cover covering the rotating motor, the pinion and the large gear is fixedly arranged on the top of the base, the shaft wall of the rotating shaft passes through the top of the protective cover, and a rotation angle limiting mechanism is provided between the top inner wall of the protective cover and the shaft wall of the rotating shaft.

[0011] Preferably, the rotation angle limiting mechanism includes a fixing ring fixedly arranged on the inner wall of the top of the protective cover, the shaft wall of the rotating shaft passes through the interior of the fixing ring, and a touch head is fixedly arranged on the shaft wall of the rotating shaft, and two travel switches are symmetrically fixedly arranged on the inner side wall of the fixing ring, and the touch head can be respectively arranged in contact with the two travel switches.

[0012] Preferably, the air blowing and dust removal mechanism includes a hollow blowing plate fixedly arranged on the top of the fixed seat, a dustproof blower is fixedly embedded on one side of the hollow blowing plate, a plurality of blowing holes are opened on the other side of the hollow blowing plate, and the air outlets of the blowing holes are inclined toward the upper surface of the circuit board body.

[0013] Preferably, the air suction filtering mechanism includes a hollow air suction plate fixedly arranged on the top of the fixed seat, a dustproof suction fan is fixedly embedded on one side of the hollow air suction plate, and a plurality of air suction holes are opened on the other side of the hollow air suction plate, a filter is vertically arranged inside the hollow air suction plate, a cover is detachably provided on the top of the hollow air suction plate by bolts, and the cover is fixedly connected to the filter.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up a circuit board extrusion force feedback mechanism, the circuit board extrusion force feedback mechanism can be set on the side wall of the circuit board body, and then the PLC controller is operated to control the extension action of the electric push rod, so that the circuit board clamping plate contacts the side wall of the circuit board extrusion force feedback mechanism. As the electric push rod continues to extend, the circuit board extrusion force feedback mechanism and the circuit board body are extruded and deformed. The greater the thrust of the electric push rod, the greater the degree of deformation of the circuit board extrusion force feedback mechanism and the circuit board body squeezed by the circuit board clamping plate, resulting in the circuit board extrusion force feedback mechanism's own resistance gradually increasing, so that the thrust of the electric push rod gradually decreases. When the current decreases to a certain extent, the port of the PLC controller that receives the current signal receives the current signal and performs programming processing, and when the current reaches the preset minimum threshold value, the PLC controller will stop the action of the electric push rod accordingly. At this time, the clamping and fixation of the circuit board body is completed, and at the same time, the circuit board body will not be squeezed and damaged.

[0015] 2. Through the optical reflectivity detection mechanism, reciprocating rotation mechanism, air blowing and dust removal mechanism and dust-proof blower, after the circuit board body is fixed, the PLC controller will automatically control the action of the optical reflectivity detection mechanism and the reciprocating rotation mechanism. The optical reflectivity detection mechanism can be controlled to fully irradiate the upper surface of the circuit board body. After the light is irradiated to the surface of the circuit board body, part of the light is absorbed by the circuit board body, and the other part of the light is reflected. If there is dust on the surface of the circuit board body, the intensity of the reflected light is weak. The optical reflectivity detection mechanism is controlled to collect the reflected light, and the reflected light signal is converted into an electrical signal, and then the signal is fed back to the PLC controller. If the intensity of the reflected light is weak, the PLC controller controls the air blowing and dust removal mechanism and the dust-proof blower to work, so as to clean the surface of the circuit board body and improve the accuracy of subsequent etching processing.

[0016] 3. Through the optical reflectivity detection mechanism set up, the staff operates the PLC controller to move the position of the optical reflectivity detection mechanism so that the optical reflectivity detection mechanism is accurately aligned with the position on the surface of the circuit board body where the copper foil needs to be etched and then stops moving, and then the copper foil is etched by adding etching liquid. As the etching proceeds, the surface of the copper foil becomes rough and produces diffuse reflection, which weakens the intensity of reflected light in a specific direction. At the same time, the thickness of the copper foil decreases, the reflective interface decreases, and the intensity of reflected light decreases accordingly. When the copper foil is completely etched and dissolved, and the surface of the circuit board body is exposed, the intensity of reflected light will further decrease. During this process, the intensity of reflected light detected by the optical reflectivity detection mechanism continues to decrease until it reaches the lowest point. The optical reflectivity detection mechanism will feedback an electrical signal to the PLC controller, and the PLC controller controls the reminder light to light up, reminding the staff that the copper foil on the circuit board body is completely etched to avoid short circuits in the integrated printed circuit board or interference with other circuits. This process does not require staff to conduct visual inspections or estimate etching time, thereby improving the accuracy and efficiency of etching. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of a computer circuit board processing and fixing device provided by the present invention; Figure 2 It is a planar structural schematic diagram of a computer circuit board processing and fixing device provided by the present invention; Figure 3 The present invention provides a computer circuit board processing and fixing device Figure 1 A schematic diagram of the structure of the circuit board extrusion force feedback mechanism; Figure 4 The present invention provides a computer circuit board processing and fixing device Figure 1 Schematic diagram of the cutaway structure.

[0018] Figure 5The present invention provides a computer circuit board processing and fixing device Figure 2 A schematic diagram of the structure of the rotation angle limiting mechanism; Figure 6 The present invention provides a computer circuit board processing and fixing device Figure 1 Schematic diagram of the cutaway structure of the central air blowing dust removal mechanism.

[0019] Figure 7 The present invention provides a computer circuit board processing and fixing device Figure 1 Schematic diagram of the cutaway structure of the central air suction filter mechanism.

[0020] In the figure: 1 base, 2 fixed seat, 3 electric push rod, 4 circuit board clamping plate, 5 circuit board body, 6 circuit board extrusion force feedback mechanism, 61 metal foil strain gauge, 62 first L-shaped placement plate, 63 second L-shaped placement plate, 64 magnetic adsorption mechanism, 641 connecting plate, 642 first permanent magnetic column, 643 second permanent magnetic column, 65 connecting rod, 7 optical reflectivity detection mechanism, 71 reflectivity measuring instrument, 72 electric slide rail, 73 electric slide block, 8 rotating shaft, 9 reciprocating Rotating mechanism, 91 rotating motor, 92 small gear, 93 large gear, 94 protective cover, 10 blowing dust removal mechanism, 101 hollow blowing plate, 102 dust-proof blower, 103 blowing hole, 11 suction filter mechanism, 111 hollow suction plate, 112 dust-proof suction fan, 113 suction hole, 114 filter, 115 cover plate, 12 PLC controller, 13 lifting plate, 14 rotation angle limiting mechanism, 141 fixing ring, 142 touch head, 143 travel switch. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] like Figure 1-Figure 7 As shown, a computer circuit board processing and fixing device comprises a base 1, a fixing seat 2 is fixedly provided on both sides of the top of the base 1, an electric push rod 3 is fixedly provided on the side walls of the two fixing seats 2, a circuit board clamping plate 4 is fixedly provided on the moving ends of the two electric push rods 3, a circuit board body 5 is provided between the two circuit board clamping plates 4, and further comprises: The circuit board extrusion force feedback mechanism 6 is arranged on the outer side wall of the circuit board body 5, and the circuit board extrusion force feedback mechanism 6 is arranged in contact with the side wall of the circuit board clamping plate 4. The circuit board extrusion force feedback mechanism 6 includes two metal foil strain gauges 61. The two metal foil strain gauges 61 are respectively attached to the two sides of the circuit board body 5. A first L-shaped placement plate 62 and a second L-shaped placement plate 63 are symmetrically arranged between the two metal foil strain gauges 61. A magnetic adsorption mechanism 64 is arranged between the first L-shaped placement plate 62 and the second L-shaped placement plate 63. A connecting rod 65 is fixed between the two first L-shaped placement plates 62 and between the two second L-shaped placement plates 63. Two lifting plates 13 are symmetrically fixed on the top of the base 1. The two lifting plates 13 respectively lift the first L-shaped placement plate 62 and the second L-shaped placement plate 63. The magnetic adsorption mechanism 64 includes a connecting plate 641 fixedly arranged on the side wall of the first L-shaped placement plate 62. One side of the connecting plate 641 extends To the inside of the second L-shaped placement plate 63, and a first permanent magnet column 642 is fixedly provided on one side of the connecting plate 641, and a second permanent magnet column 643 is fixedly provided inside the second L-shaped placement plate 63 with magnetic adsorption to the first permanent magnet column 642, and the first L-shaped placement plate 62 and the second L-shaped placement plate 63 are pulled to both sides, so that the connecting plate 641 drives the first permanent magnet column 642 to move and separate from the second permanent magnet column 643, and then the circuit board body 5 is placed between the first L-shaped placement plate 62, the second L-shaped placement plate 63 and the metal foil strain gauge 61, and the first L-shaped placement plate 62 and the second L-shaped placement plate 63 are moved close to each other, so that the first permanent magnet column 642 and the second permanent magnet column 643 are magnetically adsorbed and set, at this time, the metal foil strain gauges 61 on both sides are respectively fitted and installed on both sides of the circuit board body 5, and after the circuit board extrusion force feedback mechanism 6 is installed, the circuit board extrusion force feedback mechanism 6 is taken and placed together with the circuit board body 5 on the upper surface of the lifting plate 13.

[0023] The optical reflectivity detection mechanism 7 is arranged above the circuit board body 5, and a rotating shaft 8 is fixedly provided on one side of the optical reflectivity detection mechanism 7. The optical reflectivity detection mechanism 7 includes a reflectivity measuring instrument 71. An electric slide rail 72 is fixedly provided on the upper end of the rotating shaft 8. An electric slider 73 is provided inside the electric slide rail 72. The reflectivity measuring instrument 71 is fixedly installed at the bottom of the electric slider 73. The electric slider 73 can slide left and right inside the electric slide rail 72, so that the reflectivity measuring instrument 71 moves left and right together. At the same time, the rotating shaft 8 can drive the electric slide rail 72 to rotate, so that the light source inside the reflectivity measuring instrument 71 can fully illuminate the upper surface of the circuit board body 5.

[0024] A reciprocating rotating mechanism 9 is provided between the lower end of the rotating shaft 8 and the top of the base 1. The reciprocating rotating mechanism 9 includes a rotating motor 91 fixedly provided on the top of the base 1. A small gear 92 is fixedly provided on the output shaft of the rotating motor 91. A large gear 93 is fixedly provided on the shaft wall of the rotating shaft 8. The small gear 92 is meshed with the large gear 93. A protective cover 94 is fixedly provided on the top of the base 1 to cover the rotating motor 91, the small gear 92 and the large gear 93. The shaft wall of the rotating shaft 8 passes through the top of the protective cover 94. The rotating motor 91 can drive the small gear 92 to rotate when it works. The small gear 92 can drive the large gear 93 and the rotating shaft 8 to rotate slowly together, so that the electric slide rail 72 rotates above the circuit board body 5 through the rotating shaft 8; a rotation angle limiting mechanism 14 is provided between the top inner wall of the protective cover 94 and the shaft wall of the rotating shaft 8. The rotation angle limiting mechanism 14 includes a protective cover 94 fixedly provided on the top inner wall of the protective cover 94 and the shaft wall of the rotating shaft 8. The fixing ring 141 on the inner wall of the top of the rotating shaft 8 is provided. The shaft wall of the rotating shaft 8 passes through the interior of the fixing ring 141, and the shaft wall of the rotating shaft 8 is fixedly provided with a contact head 142. The inner wall of the fixing ring 141 is symmetrically fixed with two travel switches 143. The contact head 142 can be respectively contacted with the two travel switches 143. During the rotation of the rotating shaft 8, the contact head 142 rotates together until the contact head 142 contacts one of the travel switches 143. At this time, the travel switch 143 will feed back an electrical signal to the PLC controller 12, so that the PLC controller 12 controls the rotating motor 91 to rotate in the reverse direction. When the rotating shaft 8 rotates in the reverse direction, the contact head 142 contacts the other travel switch 143. The other travel switch 143 will feed back an electrical signal to the PLC controller 12, and control the rotating motor 91 to rotate in the reverse direction again, so as to achieve the limitation of the rotation angle.

[0025] The blowing and dust removal mechanism 10 is fixedly arranged on the top of one of the fixing seats 2, and the blowing and dust removal mechanism 10 is arranged toward the upper surface of the circuit board body 5. The blowing and dust removal mechanism 10 includes a hollow blowing plate 101 fixedly arranged on the top of the fixing seat 2, and a dustproof blower 102 is fixedly embedded on one side of the hollow blowing plate 101. A plurality of blowing holes 103 are opened on the other side of the hollow blowing plate 101, and the air outlets of the blowing holes 103 are inclined toward the upper surface of the circuit board body 5. The dustproof blower 102 can discharge the gas into the interior of the hollow blowing plate, and then blow it evenly toward the surface of the circuit board body 5 through the blowing holes 103, so that the dust on the surface of the circuit board body 5 is blown up.

[0026] The air suction filter mechanism 11 is fixedly arranged on the top of another fixing seat 2, and the air suction filter mechanism 11 is arranged toward the upper surface of the circuit board body 5. The air suction filter mechanism 11 includes a hollow air suction plate 111 fixedly arranged on the top of the fixing seat 2, a dust-proof suction fan 112 is fixedly embedded on one side of the hollow air suction plate 111, and a plurality of air suction holes 113 are opened on the other side of the hollow air suction plate 111, a filter screen 114 is vertically arranged inside the hollow air suction plate 111, and the hollow air suction plate 111 is provided with a dust-proof suction fan 112. A cover plate 115 is detachably provided on the top by bolts, and the cover plate 115 is fixedly connected to the filter 114. The dust suction fan 112 can suck the blown dust gas through a plurality of suction holes 113, and then pass the dust gas through the filter 114 for filtering and then discharge it to the outside without causing environmental pollution. When the filter 114 needs to be cleaned, the cover plate 115 and the filter 114 can be pulled upwards together by loosening the bolts, and the surface of the filter 114 can be cleaned.

[0027] The PLC controller 12 is fixedly arranged on one side of the top of the base 1, and the electric push rod 3, the circuit board extrusion force adjustment mechanism, the optical reflectivity detection mechanism 7, the reciprocating rotation mechanism 9, the blowing dust removal mechanism 10 and the suction filter mechanism 11 are all electrically connected to the PLC controller 12.

[0028] The operating principle of the present invention is described as follows: the staff first takes the circuit board extrusion force feedback mechanism 6, and then pulls the first L-shaped placement plate 62 and the second L-shaped placement plate 63 to both sides, so that the connecting plate 641 drives the first permanent magnet column 642 to move and separate from the second permanent magnet column 643, and then puts the circuit board body 5 between the first L-shaped placement plate 62, the second L-shaped placement plate 63 and the metal foil strain gauge 61, and moves the first L-shaped placement plate 62 and the second L-shaped placement plate 63 close to each other, so that the first permanent magnet column 642 and the second permanent magnet column 643 are magnetically adsorbed and set. At this time, the metal foil strain gauges 61 on both sides are respectively fitted and installed on both sides of the circuit board body 5. After the circuit board extrusion force feedback mechanism 6 is installed, the circuit board extrusion force feedback mechanism 6 is placed on the upper surface of the lifting plate 13 together with the circuit board body 5, and the preliminary preparation work is completed; The staff operates the PLC controller 12 to control the two electric push rods 3 to extend. The two electric push rods 3 can push the clamping plate to contact the metal foil strain gauge 61 on the side wall of the circuit board body 5. As the electric push rods 3 continue to extend, the external force of the clamping plate will cause the metal foil strain gauge 61 and the circuit board body 5 to be squeezed and deformed. The greater the thrust of the electric push rod 3, the greater the degree of deformation of the circuit board clamping plate 4 squeezing the metal foil strain gauge 61 and the circuit board body 5, and the deformation of the metal foil strain gauge 61 and the circuit board body 5 is synchronized, resulting in the gradual increase in the resistance of the metal foil strain gauge 61. At this time, the current of the electric push rod 3 connected to the same circuit as the metal foil strain gauge 61 gradually decreases, causing the thrust of the electric push rod 3 to gradually decrease. When the resistance of the metal foil strain gauge 61 increases to a certain extent, The current of the metal foil strain gauge 61 and the PLC controller 12 connected to the same monitoring circuit will be reduced to a certain extent. The port receiving the current signal of the PLC controller 12 receives the current signal and performs programming processing. When the current reaches the preset minimum threshold value (the PLC controller 12 adopts a programmable controller, and the staff sets the threshold value inside the PLC controller 12 before processing), the PLC controller 12 will stop the action of the electric push rod 3 accordingly (in this circuit, it may be necessary to add a current limiting resistor, a signal conditioning circuit (such as an amplifier, a filter), etc., to protect the input port of the PLC controller 12 from the impact of excessive voltage or current, and ensure that the signal can be accurately recognized by the PLC controller 12). At this time, the clamping and fixing of the circuit board body 5 is completed, and at the same time, the circuit board body 5 will not be squeezed and damaged (cracked, delamination); After the circuit board body 5 is fixed, the PLC controller 12 will automatically control the turning on of the rotating motor 91, the electric slide rail 72, the electric slider 73 and the reflectivity meter 71. The rotating motor 91 can drive the small gear 92 to rotate, and the small gear 92 can drive the large gear 93 and the rotating shaft 8 to rotate slowly together, so that the electric slide rail 72 rotates above the circuit board body 5 through the rotating shaft 8. At the same time, the electric slider 73 slides left and right inside the electric slide rail 72, so that the reflectivity meter 71 moves left and right together, so that the light source inside the reflectivity meter 71 can fully illuminate the upper surface of the circuit board body 5. After the light is irradiated to the surface of the circuit board body 5, part of the light is absorbed by the circuit board body 5, and the other part of the light is reflected. The optical system of the reflectivity meter 71 collects the reflected light and focuses it on the light detector. The reflected light signal is converted into an electrical signal through the light detector, and then the signal is fed back to the analog input module of the PLC controller 12. The PLC controller 12 compares and judges the data through analog-to-digital conversion. According to the results of the comparison and judgment, the PLC controller 12 controls the relevant output device to perform an action; If the intensity of the reflected light is weak (the intensity of the reflected light here is compared with the intensity of the reflected light of the circuit board body 5 with a clean surface), it means that there is a lot of dust on the surface of the circuit board body 5 (when the surface of the circuit board body 5 is covered with dust, the dust particles will cause part of the light to scatter in different directions, resulting in a decrease in the intensity of the reflected light and a more dispersed distribution of the reflected light). At this time, the PLC controller 12 can automatically control the dust-proof blower 102 and the dust-proof suction fan 112 to work. The dust-proof blower 102 can discharge the gas into the interior of the hollow blowing plate, and then blow it evenly to the surface of the circuit board body 5 through the blowing holes 103, so that the dust on the surface of the circuit board body 5 is blown up, and the dust-proof suction fan 112 can suck the dust gas into the interior of the hollow suction plate 111 through the suction holes 113, so that the dust gas The dust on the surface of the circuit board body 5 is filtered by the filter 114 and then discharged. As the dust on the surface of the circuit board body 5 is cleaned, the intensity of the reflected light on the surface of the circuit board body 5 gradually increases until the intensity of the reflected light increases to a certain level and does not change. This indicates that the surface of the circuit board body 5 is cleaned, which improves the accuracy of the subsequent etching process. The PLC controller 12 stops the dust-proof blower 102 and the dust-proof suction fan 112 and can proceed to the next step. If the intensity of the reflected light is within the normal range (due to the copper foil on the surface of the circuit board body 5, the reflected light intensity of the copper foil is relatively large, and the reflectivity measuring instrument 71 will have too large detection data during the mobile detection process. This detection data does not need to be considered), it means that there is no dust on the surface of the circuit board body 5, and the next step can be directly performed. After the dust on the surface of the circuit board body 5 is detected, the staff controls the reflectivity meter 71 to move by operating the PLC controller 12, so that the reflectivity meter 71 stops moving after being accurately aligned with the position on the surface of the circuit board body 5 where the copper foil needs to be etched, and then the copper foil is etched by adding etching liquid. As the etching proceeds, the surface of the copper foil becomes rough and produces diffuse reflection, which weakens the intensity of reflected light in a specific direction. At the same time, the thickness of the copper foil decreases, the reflection interface decreases, and the intensity of reflected light decreases accordingly. When the copper foil is completely etched and dissolved, and the surface of the circuit board body 5 is exposed, the intensity of reflected light will further decrease. During this process, the intensity of reflected light detected by the reflectivity meter 71 continues to decrease until it reaches the lowest point. The reflectivity meter 71 will feedback an electrical signal to the PLC controller 12, and the PLC controller 12 controls the reminder light to light up, reminding the staff that the copper foil on the circuit board body 5 is completely etched, and the staff does not need to conduct visual inspection or estimate the etching time, thereby improving the accuracy and efficiency of etching. After the etching is completed, the staff operates the PLC controller 12 to control the retraction of the electric push rods 3 on both sides, so that the circuit board clamping plate 4 is separated from the metal foil strain gauge 61, and then the circuit board extrusion force feedback mechanism 6 is removed from the outside of the circuit board body 5. At the moment when the metal foil strain gauge 61 is separated from the circuit board clamping plate 4, due to its own elastic effect, the metal foil strain gauge 61 can be restored to its original state to facilitate the etching operation again.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A computer circuit board processing and fixing device, comprising a base (1), a fixing seat (2) is fixedly provided on both sides of the top of the base (1), an electric push rod (3) is fixedly provided on the side walls of the two fixing seats (2), a circuit board clamping plate (4) is fixedly provided on the moving ends of the two electric push rods (3), and a circuit board body (5) is provided between the two circuit board clamping plates (4), characterized in that: Also includes: A circuit board extrusion force feedback mechanism (6) is arranged on the outer side wall of the circuit board body (5), and the circuit board extrusion force feedback mechanism (6) is arranged in contact with the side wall of the circuit board clamping plate (4); An optical reflectivity detection mechanism (7) is arranged above the circuit board body (5), and a rotating shaft (8) is fixedly provided on one side of the optical reflectivity detection mechanism (7), and a reciprocating rotating mechanism (9) is provided between the lower end of the rotating shaft (8) and the top of the base (1); An air blowing and dust removal mechanism (10) is fixedly arranged on the top of one of the fixing seats (2), and the air blowing and dust removal mechanism (10) is arranged toward the upper surface of the circuit board body (5); An air suction filter mechanism (11) is fixedly arranged on the top of another of the fixing seats (2), and the air suction filter mechanism (11) is arranged toward the upper surface of the circuit board body (5); A PLC controller (12) is fixedly arranged on one side of the top of the base (1); the electric push rod (3), the circuit board extrusion force adjustment mechanism, the optical reflectivity detection mechanism (7), the reciprocating rotation mechanism (9), the air blowing and dust removal mechanism (10) and the air suction and filtering mechanism (11) are all electrically connected to the PLC controller (12).

2. A computer circuit board processing and fixing device according to claim 1, characterized in that: The circuit board extrusion force feedback mechanism (6) comprises two metal foil strain gauges (61), the two metal foil strain gauges (61) are respectively arranged on both sides of the circuit board body (5), a first L-shaped placement plate (62) and a second L-shaped placement plate (63) are symmetrically arranged between the two metal foil strain gauges (61), a magnetic adsorption mechanism (64) is arranged between the first L-shaped placement plate (62) and the second L-shaped placement plate (63), a connecting rod (65) is fixedly arranged between the two first L-shaped placement plates (62) and between the two second L-shaped placement plates (63), and two lifting plates (13) are symmetrically fixedly arranged on the top of the base (1), and the two lifting plates (13) respectively lift and arrange the first L-shaped placement plate (62) and the second L-shaped placement plate (63).

3. A computer circuit board processing and fixing device according to claim 2, characterized in that: The magnetic adsorption mechanism (64) comprises a connecting plate (641) fixedly arranged on the side wall of the first L-shaped placement plate (62), one side of the connecting plate (641) extending to the inside of the second L-shaped placement plate (63), and a first permanent magnetic column (642) fixedly arranged on one side of the connecting plate (641), and a second permanent magnetic column (643) magnetically adsorbed to the first permanent magnetic column (642) fixedly arranged inside the second L-shaped placement plate (63).

4. A computer circuit board processing and fixing device according to claim 1, characterized in that: The optical reflectivity detection mechanism (7) comprises a reflectivity measuring instrument (71), an electric slide rail (72) is fixedly provided at the upper end of the rotating shaft (8), an electric slider (73) is provided inside the electric slide rail (72), and the reflectivity measuring instrument (71) is fixedly mounted on the bottom of the electric slider (73).

5. A computer circuit board processing and fixing device according to claim 1, characterized in that: The reciprocating rotating mechanism (9) comprises a rotating motor (91) fixedly arranged on the top of the base (1); a pinion gear (92) is fixedly arranged on the output shaft of the rotating motor (91); a large gear (93) is fixedly arranged on the shaft wall of the rotating shaft (8); the small gear (92) and the large gear (93) are meshed with each other; a protective cover (94) is fixedly arranged on the top of the base (1) for covering the rotating motor (91), the small gear (92) and the large gear (93); the shaft wall of the rotating shaft (8) passes through the top of the protective cover (94); and a rotation angle limiting mechanism (14) is arranged between the inner wall of the top of the protective cover (94) and the shaft wall of the rotating shaft (8).

6. A computer circuit board processing and fixing device according to claim 5, characterized in that: The rotation angle limiting mechanism (14) comprises a fixing ring (141) fixedly arranged on the inner wall of the top of the protective cover (94); the shaft wall of the rotating shaft (8) passes through the interior of the fixing ring (141); a contact head (142) is fixedly arranged on the shaft wall of the rotating shaft (8); two travel switches (143) are symmetrically fixedly arranged on the inner side wall of the fixing ring (141); and the contact head (142) can be respectively arranged to contact the two travel switches (143).

7. A computer circuit board processing and fixing device according to claim 1, characterized in that: The blowing and dust removal mechanism (10) comprises a hollow blowing plate (101) fixedly arranged on the top of the fixing seat (2), a dustproof blower (102) being fixedly embedded on one side of the hollow blowing plate (101), a plurality of blowing holes (103) being provided on the other side of the hollow blowing plate (101), and air outlets of the blowing holes (103) being arranged obliquely toward the upper surface of the circuit board body (5).

8. A computer circuit board processing and fixing device according to claim 1, characterized in that: The air suction filter mechanism (11) comprises a hollow air suction plate (111) fixedly arranged on the top of the fixing seat (2); a dust-proof suction fan (112) is fixedly embedded on one side of the hollow air suction plate (111); and a plurality of air suction holes (113) are provided on the other side of the hollow air suction plate (111); a filter screen (114) is vertically arranged inside the hollow air suction plate (111); and a cover plate (115) is detachably arranged on the top of the hollow air suction plate (111) by means of bolts, and the cover plate (115) is fixedly connected to the filter screen (114).

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