Auxiliary lifting rail assembly for tin spraying machine head of circuit board

Abstract

The utility model discloses a circuit board tin spraying machine head lifting auxiliary rail assembly which comprises a bottom plate strip arranged in the vertical direction. The auxiliary rail strip is arranged on the front side of the bottom plate strip in the vertical direction, and a guide groove is formed in the auxiliary rail strip; the guide seat is arranged in the guide groove, guide rolling wheels are movably arranged on the two sides of the guide seat, and the guide rolling wheels abut against the inner side wall of the guide groove; the two cleaning structures are arranged on the upper side and the lower side of the guide base correspondingly and used for scraping tin slag on the inner side wall of the guide groove. By means of the structure, in the process that the guide seat ascends and descends along with the machine head, the cleaning structures on the upper side and the lower side of the guide seat can scrape off tin slag splashed and attached to the inner side wall of the guide groove, the guide roller is prevented from being scraped when rolling and passing through the tin slag, abrasion of the guide roller is effectively reduced, and the auxiliary rail assembly is not prone to damage and long in service life.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board tin spraying equipment, in particular to a lifting auxiliary rail component of a circuit board tin spraying machine head. Background Art

[0002] Some circuit boards require a tin-spraying step during the production process. Specifically, the circuit board is immersed in a molten solder pool, the exposed copper surface is covered with solder, and then the excess solder on the circuit board is removed by a hot air cutter.

[0003] In the automated production process, the positioning module on the machine head is used to position the circuit board, and then the machine head moves downward to immerse the circuit board in the solder pool, and then the machine head moves upward to move the circuit board to the working range of the heat sealing cutter. During this process, the machine head is driven by the lifting module to lift and lower. Among them, the machine head usually has a large width to be able to cooperate with the positioning module to position large-size circuit boards. In order to ensure the smooth movement of the machine head, when configuring the high-precision guide main rail for the machine head, it is also necessary to configure the machine head with a secondary rail assembly.

[0004] Common auxiliary rail assemblies include roller type and slider type. The roller type uses the roller rolling on the rail surface to guide the movement of the machine head. When the heat sealing cutter blows out air to remove excess solder on the circuit board, tin slag sometimes adheres to the rail surface. The roller will be scratched when rolling over the tin slag, causing the roller to wear more and be damaged, making the auxiliary rail assembly easy to damage and having a short service life. Utility Model Content

[0005] The utility model aims to provide a lifting auxiliary rail assembly for a tin spraying machine head of a circuit board, which can solve the problem that the auxiliary rail assembly is easy to be damaged and has a short service life.

[0006] To achieve the above-mentioned purpose, a circuit board tin spraying machine head lifting auxiliary rail assembly is provided, which includes: a bottom plate bar, which is arranged vertically; an auxiliary rail bar, which is vertically arranged on the front side of the bottom plate bar, and the auxiliary rail bar is provided with a guide groove; a guide seat, which is arranged in the guide groove, and guide rollers are movably arranged on both sides of the guide seat, and the guide rollers are in contact with the inner side walls of the guide groove; a cleaning structure, which is provided in two and is arranged on the upper and lower sides of the guide seat, and is used to scrape off the tin slag on the inner side walls of the guide groove.

[0007] According to the circuit board tin spraying machine head lifting auxiliary rail assembly, the cleaning structure includes a mounting plate, a scraper and a screw member, the mounting plate is connected to the guide seat, both sides of the mounting plate are provided with strip through grooves, and scrapers are stacked, the screw member is passed through the strip through groove and the scraper, and a nut member is provided in cooperation, the distance between the side edge of the scraper and the inner side wall of the guide groove is L, 0≤L≤0.5mm.

[0008] According to the circuit board tin spraying machine head lifting auxiliary rail assembly, the scrapers on both sides of the mounting plate are arranged in an eight-shaped shape.

[0009] According to the circuit board tin spraying machine head lifting auxiliary rail assembly, both upper and lower ends of the bottom plate strip are provided with blowing seats, and both sides of the blowing seat are provided with blowing ports.

[0010] According to the circuit board tin spraying machine head lifting auxiliary rail assembly, the blowing seat is provided with a switch valve, and the guide seat is provided with a trigger rod opposite to the operating end of the switch valve.

[0011] According to the circuit board tin spraying machine head lifting auxiliary rail assembly, mesh covers are provided on both sides of the upper and lower ends of the bottom plate strip.

[0012] According to the circuit board tin spraying machine head lifting auxiliary rail assembly, the scraper is bent at one side away from the guide seat to form a transversely arranged support platform.

[0013] According to the circuit board tin spraying machine head lifting auxiliary rail assembly, the auxiliary rails are provided in plurality and are arranged in sequence vertically.

[0014] According to the circuit board tin spraying machine head lifting auxiliary rail assembly, a positioning through hole is opened on the rear side of the auxiliary rail strip, a positioning boss is protruding from the surface of the bottom plate strip, the positioning boss is inserted into the positioning through hole, and the positioning boss is opened with a positioning screw hole.

[0015] Beneficial effect: As in the above structure, when the guide seat follows the rise and fall of the machine head, the cleaning structures on the upper and lower sides of the guide seat can scrape off the tin slag splashed and adhered to the inner wall of the guide groove, avoiding the guide roller from being scratched when rolling over the tin slag, effectively reducing the wear of the guide roller, making the auxiliary rail assembly not easy to be damaged and having a longer service life.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0018] Figure 1 It is a front cross-sectional view of an embodiment of the utility model;

[0019] Figure 2 for Figure 1 A magnified view of part A;

[0020] Figure 3 is a side sectional view of the bottom plate bar and the auxiliary rail;

[0021] Figure 4This is a bottom view of the auxiliary rail and guide seat. DETAILED DESCRIPTION

[0022] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0023] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 a limitation on the present invention.

[0024] In the description of the present utility model, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0025] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0026] Reference Figure 1-4 A circuit board tin spraying machine head lifting auxiliary rail assembly, which includes a bottom plate bar 10, an auxiliary rail bar 20, a guide seat 30 and a cleaning structure 40. The bottom plate bar 10 and the auxiliary rail bar 20 are arranged vertically. The auxiliary rail bar 20 is fixedly arranged on the front side of the bottom plate bar 10. A guide groove 21 is arranged on the auxiliary rail bar 20. The guide seat 30 is arranged in the guide groove 21, and guide rollers 31 are movably arranged on both sides of the guide seat 30. The guide rollers 31 abut against the inner side wall of the guide groove 21. The cleaning structure 40 is set in two and is arranged on the upper and lower sides of the guide seat 30. The cleaning structure is used to scrape off the tin slag on the inner side wall of the guide groove 21.

[0027] During installation and use, the bottom plate strip 10 is vertically fixed on the tin spraying equipment, the guide seat 30 is fixedly connected to the machine head (the machine head carries the positioning module), and when the machine head is lifted or lowered, the guide roller 31 rolls along the inner side wall of the guide groove 21 (that is, the inner side wall of the guide groove 21 is the rail surface that cooperates with the guide roller 31), so that the machine head can be lifted or lowered smoothly. In the process of the guide seat 30 following the lifting or lowering of the machine head, the cleaning structures on the upper and lower sides of the guide seat 30 can scrape off the tin slag splashed and adhered to the inner side wall of the guide groove 21, so as to prevent the guide roller 31 from being scratched when rolling over the tin slag, effectively reduce the wear of the guide roller 31, and make the auxiliary rail assembly not easy to be damaged and have a long service life.

[0028] The cleaning structure includes a mounting plate 41, a scraper 42 and a screw 43. The mounting plate 41 is fixedly connected to the guide seat 30 by screws. A strip-shaped through groove 411 is provided on both sides of the mounting plate 41, and a scraper 42 is stacked on both sides of the mounting plate 41. The screw 43 is inserted into the strip-shaped through groove 411 and the scraper 42, and a nut 44 is provided in a matching sleeve. The distance between the side edge of the scraper 42 and the inner wall of the guide groove 21 is L, 0≤L≤0.5mm. As in the above structure, the length of the strip-shaped through groove 411 is greater than the rod diameter of the screw 43, so as to facilitate the adjustment of the position of the scraper 42. The scraper 42 can be positioned by tightening the nut 44.

[0029] In this embodiment, the scrapers 42 on both sides of the mounting plate 41 are arranged in an eight-shaped shape to scrape off the tin slag.

[0030] In this embodiment, the upper and lower ends of the bottom plate strip 10 are provided with a blowing seat 50, and both sides of the blowing seat 50 are provided with a blowing port. When the guide seat 30 moves close to the blowing seat 50, the high-speed airflow blown out of the blowing port blows off the tin slag adhering to the edge of the scraper 42.

[0031] In order to control the airflow of the blowing seat 50, a switch valve 51 is provided on the blowing seat 50, and a trigger rod 32 is provided on the guide seat 30, which is opposite to the operating end of the switch valve 51. The switch valve 51 is connected to the air source and the blowing port, respectively. When the guide seat 30 moves close to the blowing seat 50, the trigger rod 32 presses the operating end of the switch valve 51 to conduct the switch valve 51, and the airflow can flow to the blowing port through the switch valve 51; when the guide seat 30 moves away from the blowing seat 50, the trigger rod 32 is separated from the operating end of the switch valve 51, and the switch valve 51 is automatically reset and cut off, and the airflow no longer flows to the blowing port through the switch valve 51.

[0032] In this embodiment, mesh covers 60 are provided on both sides of the upper and lower ends of the bottom plate strip 10. The airflow from the air outlet carries the tin slag into the mesh cover 60, and the mesh cover 60 intercepts the tin slag to prevent the tin slag from splashing to other locations and causing secondary pollution.

[0033] In this embodiment, the scraper 42 is bent on one side away from the guide seat 30 to form a transversely arranged support platform 421. For the cleaning structure 40 located on the upper side of the guide seat 30, part of the tin slag scraped off by the edge of the scraper 42 remains on the edge of the scraper 42, and part falls on the support platform 421, so as to avoid the scraped tin slag falling to other positions and causing secondary pollution; and the tin slag on the edge of the scraper 42 and the support platform 421 can be blown into the mesh cover 60 through the blowing seat 50 on the top of the bottom plate strip 10 (when the airflow blows the tin slag, since the scrapers 42 on both sides of the mounting plate 41 are arranged in an eight-shaped shape, the airflow can move in a relatively smooth path, reducing turbulence and causing the tin slag to splash outside the mesh cover).

[0034] In this embodiment, a plurality of auxiliary rails 20 are provided and arranged in sequence in the vertical direction. A single auxiliary rail 20 is short in length and easy to replace; and when the guide seat 30 needs to be detached, the guide seat 30 can be slid out after one of the auxiliary rails 20 is detached, and the guide seat 30 does not need to be slid to the upper end or the lower end of the bottom plate 10.

[0035] In this embodiment, a countersunk hole 11 is provided on the bottom plate strip 10, and a bolt is passed through the countersunk hole 11 and screwed on the tin-spraying device to fix it. A positioning through hole 22 is provided on the rear side of the auxiliary rail 20, and a positioning boss 12 is convexly provided on the surface of the bottom plate strip 10. The positioning boss 12 is inserted into the positioning through hole 22, and a positioning screw hole 13 is provided on the positioning boss 12. During assembly, the positioning boss 12 is inserted into the positioning through hole 22, so that the auxiliary rail 20 and the bottom plate strip 10 can be accurately positioned; the bolt is screwed into the positioning screw hole 13 through the positioning through hole 22 to fix the auxiliary rail 20 and the bottom plate strip 10.

[0036] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A circuit board tin spraying machine head lifting auxiliary rail assembly, characterized in that: include: Bottom strips, the bottom strips are arranged in a vertical direction; A secondary rail bar is vertically arranged on the front side of the bottom plate bar, and the secondary rail bar is provided with a guide groove; A guide seat is arranged in the guide groove, and guide rollers are movably arranged on both sides of the guide seat, and the guide rollers abut against the inner side wall of the guide groove; The cleaning structure is provided in two parts and is respectively arranged on the upper and lower sides of the guide seat, and is used for scraping off the tin slag on the inner wall of the guide groove.

2. A circuit board tin spraying machine head lifting auxiliary rail assembly according to claim 1, characterized in that: The cleaning structure includes a mounting plate, a scraper and a screw component. The mounting plate is connected to the guide seat. Both sides of the mounting plate are provided with strip-shaped through grooves and are stacked with scrapers. The screw component is passed through the strip-shaped through grooves and the scraper, and is matched with a nut component. The distance between the side edge of the scraper and the inner side wall of the guide groove is L, 0≤L≤0.5mm.

3. A circuit board tin spraying machine head lifting auxiliary rail assembly according to claim 2, characterized in that: The scrapers on both sides of the mounting plate are arranged in an eight-shaped shape.

4. A circuit board tin spraying machine head lifting auxiliary rail assembly according to claim 3, characterized in that: The upper and lower ends of the bottom plate strip are both provided with air blowing seats, and both sides of the air blowing seat are both provided with air blowing ports.

5. A circuit board tin spraying machine head lifting auxiliary rail assembly according to claim 4, characterized in that: The blowing seat is provided with a switch valve, and the guide seat is provided with a trigger rod opposite to the operating end of the switch valve.

6. A circuit board tin spraying machine head lifting auxiliary rail assembly according to claim 4, characterized in that: Net covers are arranged on both sides of the upper and lower ends of the bottom plate strip.

7. A circuit board tin spraying machine head lifting auxiliary rail assembly according to claim 4, 5 or 6, characterized in that: The scraper is bent at one side away from the guide seat to form a transversely arranged support platform.

8. The circuit board tin spraying machine head lifting auxiliary rail assembly according to claim 1, characterized in that: The auxiliary rails are provided in plurality and are arranged in sequence along the vertical direction.

9. A circuit board tin spraying machine head lifting auxiliary rail assembly according to claim 8, characterized in that: A positioning through hole is provided on the rear side of the auxiliary rail, a positioning boss is protruding from the surface of the bottom plate, the positioning boss is inserted in the positioning through hole, and a positioning screw hole is provided on the positioning boss.

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