PCBA lead-free soldering preheating platform

Abstract

This utility model provides a lead-free soldering preheating platform for PCBA, belonging to the field of electronic manufacturing technology. It addresses the problem of residual heat inside the preheating platform easily burning workers and posing a safety hazard. The platform includes a preheating platform body, hot air ducts, an inspection port, an inspection operating handle, preheating conveying rails, a preheating alignment platform, and an inspection and protection mechanism, which in turn forms a preheating alignment mechanism. The hot air duct is fixedly connected to the top of the preheating platform body. The inspection port is located at the front of the preheating platform body. The inspection operating handle is rotatably connected to the front of the preheating platform body. The preheating conveying rails are fixedly connected to the inner side of the preheating platform body. The preheating alignment platform is fixedly connected inside the preheating platform body. The inspection and protection mechanism is located at the front end of the preheating platform body. The preheating alignment mechanism is located above the preheating alignment platform, improving worker safety when inspecting the preheating platform body.

Description

Technical Field

[0001] This utility model belongs to the field of electronic manufacturing technology, and more specifically, it relates to a lead-free soldering preheating platform for PCBA. Background Technology

[0002] PCBA lead-free soldering preheating platforms are one of the key pieces of equipment used in electronic manufacturing for the assembly of printed circuit boards (PCBs). They are mainly used in the preheating stage of lead-free soldering processes. The preheating platform is a device that uses controlled heating to uniformly preheat the PCBA and components before soldering. Its main functions are to reduce thermal shock during soldering, prevent damage to components due to sudden temperature changes (such as cracking of ceramic capacitors), ensure that the solder (such as Sn-Ag-Cu lead-free solder) melts fully, improve the quality of solder joints, volatilize the solvent in the flux, and reduce soldering defects (such as porosity). The heating methods commonly used are infrared (IR), hot air, or a combination of both.

[0003] The existing application number CN201310310456.3 discloses a preheating device and method for printed circuit boards. The preheating device includes a housing with an inner cavity, a heating component disposed within the housing for heating the air inside the housing, a volute fixed within the housing and having an air inlet and an air outlet, a motor fixed to the housing and having an output shaft extending into the volute, a fan mounted on the output shaft and capable of rotating with the output shaft to allow hot air to enter the volute from the air inlet and be ejected from the air outlet, and a nozzle plate detachably mounted on the housing for spraying the hot air ejected from the air outlet onto the printed circuit board. Because the preheating device is equipped with a detachable nozzle plate, the size and shape of the nozzle orifice can be customized according to the specific printed circuit board. Thus, the same preheating device can adapt to the preheating treatment of various printed circuit boards, exhibiting strong adaptability and providing maximum protection for the components on the printed circuit board, ensuring safety and reliability.

[0004] Based on the above, when the preheating platform is used for a long time, workers need to regularly inspect the inside of the preheating platform. During the inspection, workers directly open the inspection door of the preheating platform, and the residual heat inside the preheating platform can easily burn the workers, which poses a certain safety hazard. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a PCBA lead-free soldering preheating platform. This solves the problem that when the preheating platform is used for a long time, workers need to periodically inspect the inside of the preheating platform. During inspection, workers directly open the inspection door of the preheating platform, and the residual heat inside the preheating platform can easily burn the workers, posing a certain safety hazard.

[0006] The purpose and effectiveness of this utility model PCBA lead-free soldering preheating platform are achieved through the following specific technical means:

[0007] The PCBA lead-free soldering preheating platform includes a preheating platform body, hot air duct, inspection port, inspection operating handle, preheating conveying guide rail, preheating alignment platform, inspection and protection mechanism, and preheating alignment mechanism. The hot air duct is fixedly connected to the top of the preheating platform body. The inspection port is located at the front of the preheating platform body. The inspection operating handle is rotatably connected to the front of the preheating platform body. Two sets of preheating conveying guide rails are provided, and the two sets of preheating conveying guide rails are fixedly connected to the inner side of the preheating platform body. The preheating alignment platform is fixedly connected to the inside of the preheating platform body. The inspection and protection mechanism is located at the front end of the inside of the preheating platform body. The preheating alignment mechanism is located above the preheating alignment platform.

[0008] Furthermore, the maintenance and protection mechanism includes: a maintenance and protection door and a maintenance and observation window; the maintenance and protection door is slidably connected to the front interior of the preheating platform body, and the maintenance and protection door is made of heat-insulating material; the maintenance and observation window is fixedly connected to the left side of the maintenance and protection door, and the maintenance and observation window is made of heat-sensitive glass.

[0009] Furthermore, the maintenance and protection mechanism also includes: a first maintenance gear, a second maintenance gear, a first maintenance rack, and a second maintenance rack; the first maintenance gear is rotatably connected to the front interior of the preheating platform body, and is coaxially and fixedly connected to the maintenance operation handle; the second maintenance gear is rotatably connected to the front interior of the preheating platform body, and meshes with the lower part of the first maintenance gear; the first maintenance rack is fixedly connected to the upper part of the maintenance protection door, and meshes with the first maintenance gear; the second maintenance rack is fixedly connected to the left side of the first maintenance rack, and meshes with the second maintenance gear.

[0010] Furthermore, the preheating alignment mechanism includes: an alignment extrusion component and an alignment contact component; two sets of alignment extrusion components are provided, and the two sets of alignment extrusion components are slidably connected to the front and rear sides above the preheating alignment platform respectively; two sets of alignment contact components are provided, and the two sets of alignment contact components are both high-temperature resistant rubber block structures, and the two sets of alignment contact components are fixedly connected to the opposite ends of the alignment extrusion components respectively.

[0011] Furthermore, the preheating alignment mechanism also includes an alignment extrusion cylinder; the alignment extrusion cylinder is fixedly connected to the upper rear end of the preheating alignment platform, and the front end of the piston rod of the alignment extrusion cylinder is fixedly connected to a set of alignment extrusion components at the rear.

[0012] Furthermore, the preheating alignment mechanism also includes: an alignment guide wheel, an alignment transmission cable, and an alignment reset spring; the alignment guide wheel is rotatably connected to the lower rear end of the preheating alignment platform; the alignment transmission cable is wrapped around the outer periphery of the alignment guide wheel, and the front and rear ends of the alignment transmission cable are respectively fixedly connected to the alignment extrusion members; the alignment reset spring is fixedly connected to the rear end of the front set of alignment extrusion members, and the rear end of the alignment reset spring is fixedly connected to the preheating alignment platform.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This invention utilizes a maintenance and protection mechanism. Rotating the maintenance operating handle drives the first maintenance gear, which in turn moves the first maintenance rack to the right. This movement of the rack moves the maintenance protection door to the right, exposing the maintenance observation window. Workers can then judge the internal temperature of the preheating platform by observing the color of the observation window. Simultaneously, the movement of the first maintenance rack to the right also moves the second maintenance rack to the right. Once the second rack engages with the second maintenance gear, the first rack disengages, causing a feeling of loss in the worker's hand. This serves as a warning, preventing workers from blindly opening the preheating platform and improving worker safety during maintenance.

[0015] This invention utilizes a preheating alignment mechanism. When the alignment extrusion cylinder is opened, the piston rod of the cylinder moves back and forth, causing a rear set of alignment extrusion components to move back and forth. This movement of the rear set of components pulls the alignment transmission cable, which, guided by the alignment guide wheel, drives a front set of alignment extrusion components to move back and forth. The reciprocating movement of the two sets of components extrudes the circuit board, ensuring its centered alignment and keeping it constantly within the heating zone. This prevents the circuit board from shifting during transport, which could lead to uneven heating and improves the preheating effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the inspection and observation window structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the second maintenance rack structure of this utility model.

[0019] Figure 4 This is a schematic diagram of the first maintenance gear structure of this utility model.

[0020] Figure 5This is a schematic diagram of the alignment extrusion component structure of this utility model.

[0021] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0022] 1. Preheating platform main body; 101. Inspection and protection door; 102. Inspection and observation window; 103. First inspection gear; 104. Second inspection gear; 105. First inspection rack; 106. Second inspection rack; 2. Hot air duct; 3. Inspection port; 4. Inspection operating handle; 5. Preheating conveying guide rail; 6. Preheating alignment platform; 601. Alignment extrusion component; 602. Alignment contact component; 603. Alignment extrusion cylinder; 604. Alignment guide wheel; 605. Alignment transmission cable; 606. Alignment reset spring. Detailed Implementation

[0023] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0024] Example 1:

[0025] As attached Figures 1 to 4 As shown:

[0026] This utility model provides a PCBA lead-free soldering preheating platform, including a preheating platform body 1, a hot air duct 2, an inspection port 3, an inspection operation handle 4, a preheating conveying guide rail 5, a preheating alignment platform 6, and an inspection and protection mechanism; the hot air duct 2 is fixedly connected to the top of the preheating platform body 1; the inspection port 3 is opened at the front of the preheating platform body 1; the inspection operation handle 4 is rotatably connected to the front of the preheating platform body 1; two sets of preheating conveying guide rails 5 are provided, and the two sets of preheating conveying guide rails 5 are fixedly connected to the inner side of the preheating platform body 1 respectively; the preheating alignment platform 6 is fixedly connected to the inside of the preheating platform body 1; the inspection and protection mechanism is located at the front end of the inside of the preheating platform body 1.

[0027] The maintenance and protection mechanism includes: a maintenance and protection door 101, a maintenance observation window 102, a first maintenance gear 103, a second maintenance gear 104, a first maintenance rack 105, and a second maintenance rack 106. The maintenance and protection door 101 is slidably connected to the front interior of the preheating platform body 1 and is made of heat-insulating material. The maintenance observation window 102 is fixedly connected to the left side of the maintenance and protection door 101 and is made of heat-sensitive glass. The first maintenance gear 103 is rotatably connected to the interior of the preheating platform body 1. At the front of the unit, the first maintenance gear 103 is coaxially and fixedly connected to the maintenance operation handle 4; the second maintenance gear 104 is rotatably connected to the front of the preheating platform body 1, and the second maintenance gear 104 meshes below the first maintenance gear 103; the first maintenance rack 105 is fixedly connected above the maintenance protective door 101, and the first maintenance rack 105 meshes with the first maintenance gear 103; the second maintenance rack 106 is fixedly connected to the left side of the first maintenance rack 105, and the second maintenance rack 106 meshes with the second maintenance gear 104.

[0028] The specific usage and function of this embodiment are as follows: When the worker needs to inspect the preheating platform body 1, the worker rotates the inspection operation handle 4. The rotation of the inspection operation handle 4 drives the first inspection gear 103 to rotate, which in turn drives the first inspection rack 105 to move to the right. The movement of the first inspection rack 105 to the right causes the inspection protection door 101 to move to the right, exposing the inspection observation window 102. At this time, the worker can judge the internal temperature of the preheating platform body 1 by observing the color of the inspection observation window 102. At the same time, the movement of the first inspection rack 105 to the right also drives the second inspection rack 106 to move to the right. After the second inspection rack 106 moves to the right and engages with the second inspection gear 104, the first inspection rack 105 disengages from the first inspection gear 103. At this time, the worker feels a sense of loss, which serves as a reminder to the worker and prevents the worker from blindly opening the preheating platform body 1, thus improving the safety of the worker when inspecting the preheating platform body 1.

[0029] Example 2:

[0030] This utility model provides a lead-free soldering preheating platform for PCBAs, based on Embodiment 1, such as... Figures 1 to 5 As shown, it also includes a preheating alignment mechanism, which is located above the preheating alignment platform 6.

[0031] The preheating alignment mechanism includes: an alignment extrusion component 601, an alignment contact component 602, an alignment extrusion cylinder 603, an alignment guide wheel 604, an alignment transmission cable 605, and an alignment return spring 606. Two sets of alignment extrusion components 601 are provided, slidably connected to the front and rear sides above the preheating alignment platform 6. Two sets of alignment contact components 602 are provided, both being high-temperature resistant rubber block structures, and fixedly connected to the opposite ends of the alignment extrusion components 601. The alignment extrusion cylinder... Alignment cylinder 603 is fixedly connected to the upper rear end of the preheating alignment platform 6. The front end of the piston rod of alignment extrusion cylinder 603 is fixedly connected to a rear set of alignment extrusion components 601. Alignment guide wheel 604 is rotatably connected to the lower rear end of the preheating alignment platform 6. Alignment transmission cable 605 is wrapped around the outer circumference of alignment guide wheel 604. The front and rear ends of alignment transmission cable 605 are fixedly connected to alignment extrusion components 601 respectively. Alignment reset spring 606 is fixedly connected to the rear end of the front set of alignment extrusion components 601. The rear end of alignment reset spring 606 is fixedly connected to the preheating alignment platform 6.

[0032] The specific usage and function of this embodiment are as follows: When the circuit board is preheated, the alignment and extrusion cylinder 603 is opened. The piston rod of the alignment and extrusion cylinder 603 moves back and forth, driving the rear set of alignment and extrusion components 601 to move back and forth. The rear set of alignment and extrusion components 601 moves back and forth, pulling the alignment transmission cable 605. Under the guidance of the alignment guide wheel 604, the alignment transmission cable 605 drives the front set of alignment and extrusion components 601 to move back and forth. The reciprocating back and forth movement of the two sets of alignment and extrusion components 601 realizes the extrusion of the circuit board, ensuring that the circuit board is centered and aligned, so that the circuit board is always in the heating area, avoiding the circuit board from shifting during transportation, which would cause uneven heating of the circuit board and improve the preheating effect of the circuit board.

[0033] The following points should be noted in this article:

[0034] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in general design.

[0035] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0036] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A PCBA lead-free solder preheating platform, characterized in that: The system includes a preheating platform body (1), a hot air duct (2), an inspection port (3), an inspection operation handle (4), a preheating conveying guide rail (5), a preheating alignment platform (6), an inspection and protection mechanism, and a preheating alignment mechanism. The hot air duct (2) is fixedly connected to the top of the preheating platform body (1). The inspection port (3) is located at the front of the preheating platform body (1). The inspection operation handle (4) is rotatably connected to the front of the preheating platform body (1). Two sets of preheating conveying guide rails (5) are provided, and the two sets of preheating conveying guide rails (5) are fixedly connected to the inner side of the preheating platform body (1). The preheating alignment platform (6) is fixedly connected to the inside of the preheating platform body (1). The inspection and protection mechanism is located at the front end of the inside of the preheating platform body (1). The preheating alignment mechanism is located above the preheating alignment platform (6).

2. The PCBA lead-free soldering preheating platform as described in claim 1, characterized in that: The maintenance and protection mechanism includes a maintenance and protection door (101) and a maintenance and observation window (102); the maintenance and protection door (101) is slidably connected to the front of the preheating platform body (1) and is made of heat-insulating material; the maintenance and observation window (102) is fixedly connected to the left side of the maintenance and protection door (101) and is made of thermosensitive glass.

3. The PCBA lead-free soldering preheating platform as described in claim 2, characterized in that: The maintenance and protection mechanism further includes: a first maintenance gear (103), a second maintenance gear (104), a first maintenance rack (105), and a second maintenance rack (106); the first maintenance gear (103) is rotatably connected to the front interior of the preheating platform body (1), and the first maintenance gear (103) is coaxially fixedly connected to the maintenance operation handle (4); the second maintenance gear (104) is rotatably connected to the front interior of the preheating platform body (1), and the second maintenance gear (104) meshes below the first maintenance gear (103); the first maintenance rack (105) is fixedly connected above the maintenance protection door (101), and the first maintenance rack (105) meshes with the first maintenance gear (103); the second maintenance rack (106) is fixedly connected to the left side of the first maintenance rack (105), and the second maintenance rack (106) meshes with the second maintenance gear (104).

4. The PCBA lead-free soldering preheating platform as described in claim 1, characterized in that: The preheating alignment mechanism includes: an alignment extrusion member (601) and an alignment contact member (602); two sets of alignment extrusion members (601) are provided, and the two sets of alignment extrusion members (601) are slidably connected to the front and rear sides above the preheating alignment platform (6); two sets of alignment contact members (602) are provided, and the two sets of alignment contact members (602) are both high-temperature resistant rubber block structures, and the two sets of alignment contact members (602) are fixedly connected to the opposite ends of the alignment extrusion members (601).

5. The PCBA lead-free soldering preheating platform as described in claim 4, characterized in that: The preheating alignment mechanism further includes an alignment extrusion cylinder (603); the alignment extrusion cylinder (603) is fixedly connected to the upper rear end of the preheating alignment platform (6), and the front end of the piston rod of the alignment extrusion cylinder (603) is fixedly connected to a set of alignment extrusion parts (601) at the rear.

6. The PCBA lead-free soldering preheating platform as described in claim 5, characterized in that: The preheating alignment mechanism further includes: an alignment guide wheel (604), an alignment transmission cable (605), and an alignment reset spring (606); the alignment guide wheel (604) is rotatably connected to the lower rear end of the preheating alignment platform (6); the alignment transmission cable (605) is wrapped around the outer periphery of the alignment guide wheel (604), and the front and rear ends of the alignment transmission cable (605) are respectively fixedly connected to the alignment extrusion member (601); the alignment reset spring (606) is fixedly connected to the rear end of the front set of alignment extrusion members (601), and the rear end of the alignment reset spring (606) is fixedly connected to the preheating alignment platform (6).

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