Surface treatment apparatus for printed circuit boards

Abstract

The application provides a surface treatment device for printed circuit boards, and relates to the technical field of grinding and polishing equipment. The technical problem to be solved by the application is to improve the uneven grinding and polishing effect and low processing efficiency of the existing surface treatment device for printed circuit boards. The technical solution is that the surface treatment device for printed circuit boards comprises multiple treatment mechanisms; each treatment mechanism comprises two vertical frames opposite to each other; the two vertical frames of the treatment mechanism form a treatment area, and the vertical frame is provided with a grinding tool on the side facing the treatment area; the treatment area is adapted to a limiting unit; the vertical frame on the left side of each treatment mechanism forms a component part of a first reciprocating unit that reciprocates forward and backward; and the vertical frame on the right side of each treatment mechanism forms a component part of a second reciprocating unit that reciprocates forward and backward. The application vertically places the printed circuit board, and makes the grinding tool perform linear reciprocating motion for batch grinding and polishing, so that the processing quality of the printed circuit board is more stable and uniform, and the processing efficiency is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of grinding and polishing equipment, in particular to a surface treatment device for printed circuit boards. BACKGROUND

[0002] Printed circuit boards are important electronic components, and are the support body of electronic components and the carrier for realizing electrical connection of electronic components. In the process of processing printed circuit boards, in order to remove fine burrs, oxide layers and various impurities on the board surface, surface treatment is often performed on the printed circuit boards by means of grinding and polishing, thereby laying a foundation for subsequent processing operations.

[0003] The existing surface treatment devices process printed circuit boards mostly by placing the printed circuit boards flat for grinding and polishing. However, the following problems exist: if grinding and polishing are performed on both sides at the same time, uneven grinding and polishing effects may occur, such as over-grinding of the lower surface or lack of grinding of the upper surface; if single-sided grinding and polishing is adopted, two grinding and polishing operations are required, which will result in reduced processing efficiency. In addition, the existing surface treatment devices can only process a single printed circuit board at the same time, and the processing efficiency needs to be improved. SUMMARY

[0004] The present application aims to provide a surface treatment device for printed circuit boards, which vertically places the printed circuit boards and allows the grinding tool to perform grinding or polishing in a straight reciprocating manner, so as to make the processing quality of the printed circuit boards more stable and uniform; in addition, the device has a compact structure and can simultaneously process multiple printed circuit boards, thereby improving the processing efficiency of the printed circuit boards.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0006] The surface treatment device for printed circuit boards comprises: a plurality of processing mechanisms distributed along the left-right direction; the processing mechanism comprises: two vertical frames opposite to each other; the processing mechanism has a gap between the two vertical frames constituting a processing area, and the vertical frame is provided with a grinding tool on the side facing the processing area; the processing area is adapted to limit the limiting unit for limiting the printed circuit board; the vertical frame located on the left side in each processing mechanism constitutes a component part of a first reciprocating unit; the first reciprocating unit is adapted to drive a first power source to reciprocate along the front-rear direction, and a walking unit to move left and right; the vertical frame located on the right side in each processing mechanism constitutes a component part of a second reciprocating unit; the second reciprocating unit is adapted to drive a second power source to reciprocate along the front-rear direction.

[0007] Optionally, the limiting unit comprises a limiting member and a third power source for driving the limiting member to move up and down; the limiting member comprises a horizontal part and vertical parts extending upward from both ends of the horizontal part; the horizontal part supports the lower edge of the printed circuit board, and the vertical parts limit the front and back edges of the printed circuit board, respectively.

[0008] Optionally, the grinding tool is a flexible strip; the vertical frame is provided with two winding and unwinding units on the side away from the processing area, which respectively tension the front and back ends of the grinding tool; the vertical frame comprises a bottom frame and a plate frame mounted on the bottom frame; the bottom frame comprises a bottom beam extending in the front-back direction and vertical beams extending upward from both ends of the bottom beam; the plate frame comprises a vertical plate and a top beam on the top of the vertical plate; the front and back ends of the top beam extend beyond the vertical plate and are detachably connected to the top of the vertical beams, respectively; the vertical plate supports the side of the grinding tool away from the processing area; the vertical plate and the vertical beams have a gap for the grinding tool to pass through.

[0009] Optionally, the winding and unwinding unit comprises an upper seat provided with an upper turntable, a lower seat provided with a lower turntable, a main shaft mounted between the upper turntable and the lower turntable, and a third servo motor for driving the lower turntable to rotate; the upper and lower ends of the main shaft are respectively provided with a prismatic head, and the upper and lower turntables are respectively provided with a prismatic groove matched with the prismatic head; the main shaft is divided into two half shafts along the axial direction, and an elastic layer is arranged in the cross section to clamp the end of the grinding tool; the lower seat is fixed to the side of the bottom beam away from the processing area; the top beam is provided with a limiting part for limiting the front and back sides of the upper seat to form a clamping groove matched with the upper seat; the limiting part is provided with a pin hole penetrating through the front and back, and the upper seat is provided with a positioning hole corresponding to the pin hole; the pin hole is provided with a positioning pin and a spring for pushing the positioning pin into the positioning hole; the side of the limiting part away from the upper seat is provided with an electromagnet for sucking the positioning pin out of the positioning hole.

[0010] Optionally, the vertical frame is provided with a spraying member; the spraying member comprises a plurality of spraying pipes extending in the up-down direction and a horizontal beam connected to and closing the upper ends of the spraying pipes; the plate frame is provided with an opening for accommodating the spraying pipes, and the opening divides the vertical plate into a plurality of columns; the spraying pipes support the side of the grinding tool facing the processing area, and the spraying pipes and the columns have a gap for the grinding tool to pass through; the top beam is provided with a groove for mounting the horizontal beam and a limiting opening extending downward from the groove to the opening; the width of the limiting opening is matched with the width of the spraying pipes; the side of the spraying pipes facing the processing area is provided with a plurality of spraying holes.

[0011] Optionally, the bottom beam is provided with a water inlet channel extending in the front-back direction and a water inlet interface arranged at the end; the bottom beam is provided with a socket extending downward from the top to the water inlet channel to connect with the lower end of the spraying pipe; the lower end of the column is provided with a positioning head, and the bottom beam is provided with a matching positioning groove.

[0012] Optionally, the vertical frame of the first reciprocating unit is provided with a first shaft rod extending forward at the front side; the first shaft rod is in transmission connection with a first crankshaft through a first connecting rod; the first power source is a first servo motor for driving the first crankshaft to rotate; the first shaft rod is limited in a first guide sleeve; the first guide sleeve and the first power source are both mounted on a first object table; the walking unit comprises a first linear motor for driving the first object table to move in the left-right direction.

[0013] Optionally, the vertical frame of the first reciprocating unit is provided with a first shaft rod extending forward at the front side; the first shaft rod is in transmission connection with a first crankshaft through a first connecting rod; the first power source is a first servo motor for driving the first crankshaft to rotate; the first shaft rod is limited in a first guide sleeve; the first guide sleeve and the first power source are both mounted on a first object table; the walking unit comprises a first linear motor for driving the first object table to move in the left-right direction.

[0014] Optionally, the vertical frame of the second reciprocating unit is provided with a second shaft rod extending backward at the rear side; the second shaft rod is in transmission connection with a second crankshaft through a second connecting rod; the second power source is a second servo motor for driving the second crankshaft to rotate; the second shaft rod is limited in a second guide sleeve; the second guide sleeve and the second power source are both mounted on a second object table.

[0015] Optionally, the vertical frame of the second reciprocating unit is provided with a second shaft rod extending backward at the rear side; the second shaft rod is in transmission connection with a second crankshaft through a second connecting rod; the second power source is a second servo motor for driving the second crankshaft to rotate; the second shaft rod is limited in a second guide sleeve; the second guide sleeve and the second power source are both mounted on a second object table.

[0016] The working principle of the present application is that the walking unit drives the first reciprocating unit to move, so that the vertical frame of the first reciprocating unit is away from the vertical frame of the second reciprocating unit, and the width of the processing area is expanded; the printed circuit board is placed in the processing area, and the edge of the printed circuit board is limited by the limiting unit. The walking unit drives the first reciprocating unit to move, so that the vertical frame of the first reciprocating unit is close to the vertical frame of the second reciprocating unit, and the width of the processing area is reduced; and the first power source drives the vertical frame of the first reciprocating unit to reciprocate in the front and back directions, and the second power source drives the vertical frame of the second reciprocating unit to reciprocate in the front and back directions; so that the grinding tool mounted on the vertical frame grinds or polishes both sides of the printed circuit board. After completing the surface treatment, the walking unit drives the first reciprocating unit to move, so that the vertical frame of the first reciprocating unit is away from the vertical frame of the second reciprocating unit, and the width of the processing area is expanded; in this way, the printed circuit board after surface treatment can be taken out from the processing area, and a new printed circuit board can be placed.

[0017] Therefore, the present application has the following beneficial effects: the printed circuit board is vertically placed, and the grinding tool grinds or polishes in a linear reciprocating manner; compared with the prior art of placing the printed circuit board horizontally for grinding or polishing, the present application can allow the grinding tool to apply greater pressure to the printed circuit board, while ensuring that the surface processing quality of the printed circuit board is stable and uniform, and the lower surface is not overground. In addition, the structure of the present application is more compact, and can process multiple printed circuit boards at the same time, thereby improving the processing efficiency of the printed circuit board. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 It is a structural schematic diagram of the present application;

[0020] Figure 2 It is a structural schematic diagram of the processing mechanism;

[0021] Figure 3 It is a schematic diagram of arranging the vertical frame of the first reciprocating unit;

[0022] Figure 4 It is a schematic diagram of arranging the vertical frame of the second reciprocating unit;

[0023] Figure 5 It is a structural schematic diagram of limiting the printed circuit board by the limiting unit;

[0024] Figure 6 It is a schematic diagram of arranging the grinding tool on the vertical frame;

[0025] Figure 7 Assembly diagram of the folding and unfolding unit;

[0026] Figure 8 Assembly diagram of the folding and unfolding unit;

[0027] Figure 9 Structure diagram of the vertical frame;

[0028] Figure 10 Assembly diagram of the bottom frame, the plate frame and the spraying member;

[0029] Figure 11 Structure diagram of the bottom frame;

[0030] Figure 12 Structure diagram of the plate frame;

[0031] Figure 13 Structure diagram of the spraying member;

[0032] Figure 14 Assembly diagram of the first reciprocating unit and the first limiting frame;

[0033] Figure 15 Assembly diagram of the first reciprocating unit and the walking unit;

[0034] Figure 16 Assembly diagram of the second reciprocating unit and the second limiting frame.

[0035] Fig. 1 is a processing mechanism; 2 is a vertical frame; 3 is a processing area; 4 is a grinding tool; 5 is a limiting unit; 6 is a first reciprocating unit; 7 is a first power source; 8 is a second reciprocating unit; 9 is a second power source; 10 is a limiting piece; 11 is a third power source; 12 is a retracting unit; 13 is a bottom frame; 14 is a plate frame; 15 is a bottom beam; 16 is a vertical beam; 17 is a vertical plate; 18 is a top beam; 19 is an upper pedestal; 20 is a lower turntable; 21 is a lower pedestal; 22 is a main shaft; 23 is a third servo motor; 24 is a half shaft; 25 is a limiting part; 26 is a pin hole; 27 is a positioning hole; 28 is a positioning pin; 29 is a spring; 30 is an electromagnet; 31 is a spraying piece; 32 is a spraying pipe; 33 is a cross beam; 34 is an opening; 35 is a stand; 36 is a groove; 37 is a water inlet; 38 is a socket; 39 is a positioning head; 40 is a positioning groove; 41 is a first shaft rod; 42 is a first connecting rod; 43 is a first crankshaft; 44 is a first guide sleeve; 45 is a first object table; 46 is a first linear motor; 47 is a first limiting wheel; 48 is a first limiting frame; 49 is a first limiting groove; 50 is a second linear motor; 51 is a second shaft rod; 52 is a second connecting rod; 53 is a second crankshaft; 54 is an upper turntable; 55 is a second guide sleeve; 56 is a second object table; 57 is a second limiting wheel; 58 is a second limiting frame; 59 is a second limiting groove; 60 is a lifting seat. DETAILED DESCRIPTION

[0036] Hereinafter, certain example embodiments are described simply. As can be appreciated by those skilled in the art, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and descriptions are to be regarded as illustrative in nature and not as restrictive.

[0037] In the description of the present application, it is to be understood that the terms "front", "back", "left", "right", and the like refer to the orientation or positional relationship based on the accompanying drawings, and are merely used to facilitate description of the present application and are not to be construed as indicating or implying that a referred device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. Figure 1 The terms "front", "back", "left", "right", and the like indicate the orientation or positional relationship shown in the drawings, only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0038] In addition, the terms "first", "second", are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0039] In the present application, unless otherwise clearly specified and limited, the terms "mounting", "connection", "linking", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements or interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0041] Embodiment 1

[0042] As Figures 1-5 shown, the present application provides a surface treatment device for printed circuit board. The surface treatment device comprises: a plurality of processing mechanisms 1 distributed along the left-right direction. The processing mechanism 1 comprises: two vertical frames 2 opposite to each other. The processing mechanism 1 has a gap between the two vertical frames 2 constituting a processing area 3, and the vertical frame 2 is provided with a grinding tool 4 on the side facing the processing area 3. The processing area 3 is adapted for a limiting unit 5 for limiting the printed circuit board. The vertical frame 2 located on the left side in each processing mechanism 1 constitutes a part of a first reciprocating unit 6. The first reciprocating unit 6 is adapted to drive a first power source 7 to reciprocate along the front-back direction, and a walking unit to move left and right. The vertical frame 2 located on the right side in each processing mechanism 1 constitutes a part of a second reciprocating unit 8. The second reciprocating unit 8 is adapted to drive a second power source 9 to reciprocate along the front-back direction.

[0043] It should be understood that the vertical frame 2 on the left side in each processing mechanism 1 constitutes a component of the first reciprocating unit 6; by driving the first reciprocating unit 6 to move left and right through the walking mechanism, the gap between the two vertical frames 2 in the processing mechanism 1 can be adjusted to adjust the width of the processing area 3. The printed circuit board is placed in the processing area 3, and the edge of the printed circuit board is limited by the limiting unit 5. The walking unit drives the first reciprocating unit 6 to move, so that the vertical frame 2 of the first reciprocating unit 6 approaches the vertical frame 2 of the second reciprocating unit 8, and the width of the processing area 3 is reduced; and the first power source 7 drives the vertical frame 2 of the first reciprocating unit 6 to reciprocate in the front and back directions, and the second power source 9 drives the vertical frame 2 of the second reciprocating unit 8 to reciprocate in the front and back directions; so that the grinding tool 4 installed on the vertical frame 2 grinds or polishes both sides of the printed circuit board. After completing the surface treatment, the walking unit drives the first reciprocating unit 6 to move, so that the vertical frame 2 of the first reciprocating unit 6 is away from the vertical frame 2 of the second reciprocating unit 8, and the width of the processing area 3 is expanded; in this way, the printed circuit board after surface treatment can be taken out of the processing area 3, and a new printed circuit board can be placed. The printed circuit board is vertically placed, and the grinding tool 4 grinds or polishes in a linear reciprocating manner; compared with the prior art of grinding or polishing the printed circuit board horizontally, the grinding tool 4 can exert greater pressure on the printed circuit board, while ensuring that the surface processing quality of the printed circuit board is stable and uniform, and the lower surface is not overground. In addition, the structure of the present application is more compact, and multiple printed circuit boards can be processed at the same time, improving the processing efficiency of the printed circuit board. The present application is also convenient to cooperate with the grabbing device and the upstream and downstream processing devices, which is conducive to improving the mechanization degree and automation of the printed circuit board processing. In addition, in addition to the printed circuit board, the present application can also be used for grinding or polishing other boards.

[0044] Embodiment 2

[0045] As Figure 5 shown, on the basis of embodiment 1, the limiting unit 5 comprises: a limiting piece 10, a third power source 11 for driving the limiting piece 10 to move up and down; the limiting piece 10 comprises: a horizontal part, vertical parts extending upward at both ends of the horizontal part; the horizontal part supports the lower edge of the printed circuit board, and the two vertical parts limit the front and back edges of the printed circuit board, respectively.

[0046] It should be understood that the upward movement of the limiting member 10 makes the printed circuit board placed on the limiting member 10 protrude upward from the processing area 3, so that the printed circuit board can be replaced; the downward movement of the limiting member 10 makes the printed circuit board completely enter the processing area 3, so that the printed circuit board can be surface treated. The thickness of the limiting member 10 is less than the thickness of the printed circuit board. The limiting member 10 is usually made of steel plate; the lower end of each limiting member 10 can be installed on the same lifting seat 60, and the third power source 11 can drive the lifting seat 60 to move up and down, thereby driving each limiting member 10 to move up and down synchronously. The third power source 11 can be a pneumatic cylinder or a linear motor. In addition, in order to reduce the load of the limiting member 10, the two vertical frames 2 of the processing mechanism 1 can be moved in opposite directions.

[0047] Embodiment 3

[0048] As shown in Figure 2 , Figure 6 , Figures 9-12 on the basis of Embodiment 1 or Embodiment 2, the abrasive tool 4 is a flexible strip; the side of the vertical frame 2 away from the processing area 3 is provided with two take-up and pay-off units 12, which respectively tension the front and rear ends of the abrasive tool 4; the vertical frame 2 comprises a bottom frame 13 and a plate frame 14 installed on the bottom frame 13; the bottom frame 13 comprises a bottom beam 15 extending in the front-rear direction and vertical beams 16 located at both ends of the bottom beam 15 and extending upward; the plate frame 14 comprises vertical plates 17 and a top beam 18 located at the top of the vertical plates 17; the front and rear ends of the top beam 18 protrude beyond the vertical plates 17 and are detachably connected with the top of the two vertical beams 16, respectively; the vertical plates 17 support the side of the abrasive tool 4 away from the processing area 3; the vertical plates 17 and the vertical beams 16 have a gap for the abrasive tool 4 to pass through.

[0049] It should be understood that according to requirements, sandpaper or polishing cloth can usually be selected as the abrasive tool 4. The front and rear ends of the abrasive tool 4 can pass through the gap between the vertical plates 17 and the vertical beams 16 and be respectively installed on the take-up and pay-off units 12 on the back of the vertical frame 2 and be tensioned. The vertical plates 17 support the back of the abrasive tool 4. The top beam 18 and the vertical beams 16 can be connected by bolts.

[0050] Embodiment 4

[0051] As shown in Figures 6-9As shown, on the basis of Embodiment 3, the coiling and uncoiling unit 12 comprises: an upper base 19 provided with an upper turntable 54, a lower base 21 provided with a lower turntable 20, a main shaft 22 installed between the upper turntable 54 and the upper turntable 54, and a third servo motor 23 for driving the lower turntable 20 to rotate; the upper and lower ends of the main shaft 22 are respectively provided with a prismatic head, and the upper turntable 54 and the lower turntable 20 are respectively provided with a prismatic groove matched with the prismatic head; the main shaft 22 is split into two half shafts 24 along the axial direction, and an elastic layer is arranged in the split surface to enable the two half shafts 24 to clamp the end of the abrasive tool 4; the lower base 21 is fixedly connected to the side of the bottom beam 15 away from the processing area 3; the top beam 18 is provided with a limiting portion 25 limiting the front and rear sides of the upper base 19 to form a clamping groove matched with the upper base 19; the limiting portion 25 is provided with a pin hole 26 penetrating through the front and rear sides, and the upper base 19 is provided with a positioning hole 27 corresponding to the pin hole 26; the pin hole 26 is provided with a positioning pin 28 and a spring 29 for pushing the positioning pin 28 into the positioning hole 27; the side of the limiting portion 25 away from the upper base 19 is provided with an electromagnet 30 for sucking the positioning pin 28 out of the positioning hole 27.

[0052] It should be understood that one of the coiling and uncoiling units 12 can be used as a coiling unit for coiling the abrasive tool 4, and the other coiling and uncoiling unit 12 can be used as an uncoiling unit for uncoiling the abrasive tool 4; every other time, the uncoiling unit can uncoil a section of unused abrasive tool 4, and the coiling unit can coil a section of used abrasive tool 4; in this way, the working section of the abrasive tool 4 can be periodically updated. In addition, when the entire abrasive tool 4 is used up, the main shaft 22 of the uncoiling unit can be removed, the tail end of the old abrasive tool 4 can be loosened, the tail end of the new abrasive tool 4 can be clamped between the two half shafts 24, the new abrasive tool 4 can be wound on the main shaft 22, and the head end of the new abrasive tool 4 can be connected to the tail end of the old abrasive tool 4 by bonding or other methods; then the main shaft 22 can be installed back into the uncoiling unit, and the coiling unit can be used to coil the abrasive tool 4, so that the head end of the new abrasive tool 4 can be pulled to the coiling unit. Finally, the main shaft 22 of the coiling unit can be removed, the old abrasive tool 4 can be removed, and the head end of the new abrasive tool 4 can be clamped between the two half shafts 24, and then the main shaft 22 can be installed back into the coiling unit. In this way, the replacement of the abrasive tool 4 can be completed. By using the coiling and uncoiling unit 12, a very long section of abrasive tool 4 can be stored at one time, which greatly reduces the frequency of replacement of the abrasive tool 4, and the working section of the abrasive tool 4 can be conveniently and quickly replaced. The positioning pin 28 is made of ferromagnetic material, and when the electromagnet 30 is energized, the positioning pin 28 can be sucked out of the positioning hole 27, so that the upper base 19 can be taken out upwardly; in this way, the main shaft 22 of the coiling and uncoiling unit 12 can be removed.

[0053] Embodiment 5

[0054] As Figure 6 , Figure 7 , Figure 9 , Figure 10 , Figure 12 , Figure 13As shown, on the basis of Example 3 or Example 4, the vertical frame 2 is installed with a spray component 31; the spray component 31 includes: a plurality of spray pipes 32 extending in the up-down direction, and a crossbeam 33 connecting and closing the upper end of the spray pipe 32; the plate frame 14 is provided with an opening 34 for accommodating the spray pipe 32, and the opening 34 divides the vertical plate 17 into a plurality of columns 35; the spray pipe 32 supports the side of the mold 4 facing the processing area 3, and there is a gap between the spray pipe 32 and the column 35 for the mold 4 to pass through; the top beam 18 is provided with a groove 36 for mounting the crossbeam 33, and is provided with a limit opening extending downward from the groove 36 to the opening 34; the width of the limit opening is adapted to the width of the spray pipe 32; the spray pipe 32 is provided with a plurality of spray holes on the side facing the processing area 3.

[0055] It should be understood that spray tubes 32 are positioned between the columns 35. The columns 35 are supported on the side of the mold 4 facing away from the processing area 3, while the spray tubes 32 are supported on the side of the mold 4 facing the processing area 3. The mold 4 is arranged to meander around each column 35 and each spray tube 32. This allows the mold 4 to be more tightly held against the surface of the columns 35, thereby improving the surface finish quality of the printed circuit board. Furthermore, each time the mold 4 moves back and forth in the front-to-back direction, the spray tubes 32 spray a mist of water onto the surface of the printed circuit board, not only wet-grinding the printed circuit board but also promptly removing debris from the surface. With the printed circuit board positioned vertically, the water can flow rapidly downward, carrying away debris. In the front-to-back direction, the width of the spray tubes 32 is less than half the width of the columns 35, which in turn is less than the maximum reciprocating stroke of the vertical frame 2. The crossbeam 33 can be bolted to the groove 36 of the top beam 18.

[0056] Example 6

[0057] like Figures 9-13 As shown, based on Example 5, the bottom beam 15 is provided with a water inlet channel extending in the front-to-back direction, and a water inlet interface 37 is provided at the end; the bottom beam 15 is provided with a socket 38 extending from the top downward to the water inlet channel to form a connection with the lower end of the spray pipe 32; the lower end of the column 35 is provided with a positioning head 39, and the bottom beam 15 is provided with a matching positioning groove 40.

[0058] It should be understood that the bottom beam 15 positions the lower end of the spray tube 32 via the socket 38 and the lower end of the column 35 via the positioning groove 40, thereby improving the installation accuracy of the column 35 and the spray tube 32 and preventing them from tilting or deforming after long-term use. The water inlet port 37 can be connected to a water source via a hose, and the spray tube 32 converges into the water inlet channel connected to the water inlet port 37, which helps reduce the number of hoses and makes the structure of the present invention more simple and compact.

[0059] Embodiment 7

[0060] As shown in Figure 3 , Figure 14 , Figure 15 on the basis of any one of Embodiments 1-6, the vertical frame 2 of the first reciprocating unit 6 is provided with a first shaft rod 41 extending forward at the front side; the first shaft rod 41 is in transmission connection with a first crankshaft 43 through a first connecting rod 42; the first power source 7 is a first servo motor for driving the first crankshaft 43 to rotate; the first shaft rod 41 is limited in a first guide sleeve 44; the first guide sleeve 44 and the first power source 7 are both mounted on a first object table 45; the walking unit comprises a first linear motor 46 for driving the first object table 45 to move in the left-right direction.

[0061] It should be understood that the first crankshaft 43 is driven to rotate by the first servo motor, so as to drive the vertical frame 2 of the first reciprocating unit 6 to reciprocate in the front-rear direction; compared with driving by a cylinder or a linear motor, the frequency of reciprocation can be greatly improved, so as to greatly improve the processing efficiency. The vertical frame 2 of the first reciprocating unit 6 can be provided with the water inlet 37 at the front side of the bottom beam 15. In addition, the walking unit drives the first object table 45 to move left and right, so as to drive the vertical frame 2 of the first reciprocating unit 6 to move left and right, so as to adjust the width of the processing area 3. The first guide sleeve 44 can be mounted on the first object table 45 through the first sleeve seat buckled up and down.

[0062] Embodiment 8

[0063] As shown in Figure 3 , Figure 14 , Figure 15 on the basis of Embodiment 7, the vertical frame 2 of the first reciprocating unit 6 is respectively provided with a first limiting wheel 47 at the upper and lower ends of the rear side, and is adapted to a first limiting frame 48; the first limiting frame 48 comprises a first upper limiting plate, a first lower limiting plate, and a first connecting plate connecting the first upper limiting plate and the first lower limiting plate; the bottom of the first upper limiting plate and the top of the first lower limiting plate are respectively provided with a plurality of first limiting grooves 49 extending in the front-rear direction; the first limiting grooves 49 correspond to the first limiting wheels 47 one by one, and the first limiting wheels 47 are limited in the corresponding first limiting grooves 49; the walking unit further comprises a second linear motor 50 for driving the first limiting frame 48 to move in the left-right direction; the action of the second linear motor 50 is synchronous with the action of the first linear motor 46.

[0064] It should be understood that the vertical frame 2 of the first reciprocating unit 6 is provided with a first shaft rod 41 extending forward at the front side, and the movable direction is limited in the front-back direction by a first guide sleeve 44; the vertical frame 2 of the first reciprocating unit 6 is provided with a first limiting wheel 47 at the rear side, and the movable direction is limited in the front-back direction by a first limiting frame 48; in this way, the vertical frame 2 of the first reciprocating unit 6 can move more stably in the front-back direction. In addition, the walking unit drives the first carrier table 45 and the first limiting frame 48 to move synchronously in the left-right direction, thereby driving the vertical frame 2 of the first reciprocating unit 6 to move left and right, so as to adjust the width of the processing area 3.

[0065] Embodiment 9

[0066] As shown in Figure 4 , Figure 16 , on the basis of any one of embodiments 1-8, the vertical frame 2 of the second reciprocating unit 8 is provided with a second shaft rod 51 extending backward at the rear side; the second shaft rod 51 is in transmission connection with a second crankshaft 53 through a second connecting rod 52; the second power source 9 is a second servo motor for driving the second crankshaft 53 to rotate; the second shaft rod 51 is limited in a second guide sleeve 55; the second guide sleeve 55 and the second power source 9 are both mounted on a second carrier table 56.

[0067] It should be understood that the second servo motor drives the second crankshaft 53 to rotate, thereby driving the vertical frame 2 of the second reciprocating unit 8 to reciprocate in the front-back direction; compared with driving by a cylinder or a linear motor, the frequency of reciprocation can be greatly improved, thereby greatly improving the processing efficiency. The water inlet 37 can be arranged at the rear side of the bottom beam 15. The second guide sleeve 55 can be mounted on the second carrier table 56 through a second sleeve seat buckled up and down.

[0068] Embodiment 10

[0069] As shown in Figure 4 , Figure 16 , on the basis of embodiment 9, the vertical frame 2 of the second reciprocating unit 8 is provided with a second limiting wheel 57 at each of the upper and lower ends of the front side, and is adapted with a second limiting frame 58; the second limiting frame 58 comprises a second upper limiting plate, a second lower limiting plate, and a second connecting plate connecting the second upper limiting plate and the second lower limiting plate; the bottom of the second upper limiting plate and the top of the second lower limiting plate are respectively provided with a plurality of second limiting grooves 59 extending in the front-back direction; the second limiting grooves 59 correspond to the second limiting wheels 57 one by one, and the second limiting wheels 57 are limited in the corresponding second limiting grooves 59.

[0070] It should be understood that the vertical frame 2 of the second reciprocating unit 8 is provided with a second shaft rod 51 extending rearward at the rear side, and the movable direction is limited in the front-rear direction by the second guide sleeve 55; the vertical frame 2 of the second reciprocating unit 8 is provided with a second limiting wheel 57 at the front side, and the movable direction is limited in the front-rear direction by the second limiting frame 58; in this way, the vertical frame 2 of the second reciprocating unit 8 can be more stable when reciprocating in the front-rear direction.

[0071] Although the specific embodiments of the present application are described above, those skilled in the art should understand that various changes or modifications can be made to these embodiments without departing from the principles and essence of the present application, and such changes and modifications all fall within the protection scope of the present application.

Claims

1. A surface treatment device for a printed circuit board, characterized in that: include: A plurality of processing mechanisms (1) distributed along the left-right direction; The processing mechanism (1) comprises: two vertical frames (2) facing each other on the left and right; a gap is provided between the two vertical frames (2) of the processing mechanism (1) to form a processing area (3), and a grinding tool (4) is provided on the side of the vertical frame (2) facing the processing area (3); The processing area (3) is adapted to be used for limiting the position of the printed circuit board (5); The vertical frame (2) located on the left side of each processing mechanism (1) constitutes a component of the first reciprocating unit (6); the first reciprocating unit (6) is adapted to be driven by a first power source (7) for reciprocating the first reciprocating unit in the front-back direction, and a traveling unit for driving the first reciprocating unit to move left and right; The vertical frame (2) located on the right side of each processing mechanism (1) constitutes a component of the second reciprocating unit (8); the second reciprocating unit (8) is adapted to be driven by a second power source (9) to reciprocate in the front-back direction; The grinding tool (4) is a flexible strip; Two retracting units (12) are provided on one side of the vertical frame (2) facing away from the processing area (3), respectively tightening the front and rear ends of the mold (4); The vertical frame (2) comprises: a bottom frame (13), and a plate frame (14) mounted on the bottom frame (13); The bottom frame (13) comprises: a bottom beam (15) extending in the front-rear direction, and vertical beams (16) located at both ends of the bottom beam (15) and extending upward; The plate frame (14) comprises: a vertical plate (17), and a top beam (18) located on the top of the vertical plate (17); The vertical plate (17) supports the side of the grinding tool (4) facing away from the processing area (3); a gap is provided between the vertical plate (17) and the vertical beam (16) for the grinding tool (4) to pass through; The retracting and unfolding unit (12) comprises: an upper base (19) provided with an upper turntable (54), a lower base (21) provided with a lower turntable (20), a main shaft (22) installed between the upper turntable (54) and the lower turntable (54), and a third servo motor (23) for driving the lower turntable (20) to rotate; The upper and lower ends of the main shaft (22) are respectively provided with prism heads, and the upper turntable (54) and the lower turntable (20) are respectively provided with prism grooves that cooperate with the prism heads; The main shaft (22) is divided into two half shafts (24) along the axial direction, and an elastic layer is provided on the cross section so that the two half shafts (24) can clamp the ends of the grinding tool (4); The vertical frame (2) is equipped with a spray element (31); The spray element (31) comprises: a plurality of spray tubes (32) extending in the vertical direction, and a crossbeam (33) connecting and sealing the upper ends of the spray tubes (32); The plate frame (14) is provided with an opening (34) for accommodating the spray tube (32), and the opening (34) divides the vertical plate (17) into a plurality of columns (35); The spray pipe (32) supports the side of the grinding tool (4) facing the processing area (3), and a gap is provided between the spray pipe (32) and the column (35) for the grinding tool (4) to pass through; The top beam (18) is provided with a groove (36) for mounting the cross beam (33), and is provided with a limit opening extending downward from the groove (36) to the opening (34); the width of the limit opening is adapted to the width of the spray pipe (32); The spray pipe (32) is provided with a plurality of spray holes on a side facing the treatment area (3).

2. The surface treatment device for a printed circuit board according to claim 1, wherein: The limiting unit (5) comprises: a limiting member (10), and a third power source (11) for driving the limiting member (10) to move up and down; The limiting member (10) comprises: a horizontal portion, and vertical portions located at both ends of the horizontal portion and extending upward; The horizontal portion supports the lower edge of the printed circuit board, and the two vertical portions limit the front and rear edges of the printed circuit board respectively.

3. The surface treatment device for a printed circuit board according to claim 2, wherein: The front and rear ends of the top beam (18) extend beyond the vertical plate (17) and are detachably connected to the tops of the two vertical beams (16).

4. The surface treatment device for a printed circuit board according to claim 3, wherein: The lower pedestal (21) is fixedly connected to the side of the bottom beam (15) facing away from the processing area (3); The top beam (18) is provided with a limiting portion (25) for limiting the front and rear side surfaces of the upper pedestal (19) to form a slot that matches the upper pedestal (19); The limiting portion (25) is provided with a pin hole (26) extending through the front and rear sides, and the upper pedestal (19) is provided with a positioning hole (27) corresponding to the pin hole (26); A positioning pin (28) and a spring (29) for pushing the positioning pin (28) into the positioning hole (27) are provided in the pin hole (26); The limiting portion (25) is provided with an electromagnet (30) on the side facing away from the upper pedestal (19) for sucking the positioning pin (28) out of the positioning hole (27).

5. The surface treatment device for a printed circuit board according to claim 4, characterized in that: The bottom beam (15) is provided with a water inlet channel extending in the front-to-back direction, and a water inlet interface (37) is provided at the end; The bottom beam (15) is provided with a socket (38) extending downward from the top to the water inlet channel to form a connection with the lower end of the spray pipe (32); The lower end of the column (35) is provided with a positioning head (39), and the bottom beam (15) is provided with a corresponding positioning groove (40).

6. The surface treatment device for a printed circuit board according to any one of claims 1 to 5, characterized in that: The vertical frame (2) of the first reciprocating unit (6) is provided with a first shaft (41) extending forward on the front side; The first shaft (41) is in transmission connection with the first crankshaft (43) via a first connecting rod (42); The first power source (7) is a first servo motor that drives the first crankshaft (43) to rotate; The first shaft (41) is limited to the first guide sleeve (44); The first guide sleeve (44) and the first power source (7) are both mounted on the first loading platform (45); The walking unit comprises a first linear motor (46) for driving the first loading platform (45) to move in the left-right direction.

7. The surface treatment device for a printed circuit board according to claim 6, characterized in that: The vertical frame (2) of the first reciprocating unit (6) is provided with first limiting wheels (47) at the upper and lower ends of the rear side, and is adapted to fit a first limiting frame (48); The first limiting frame (48) comprises: a first upper limiting plate, a first lower limiting plate, and a first connecting plate connecting the first upper limiting plate and the first lower limiting plate; The bottom of the first upper limit plate and the top of the first lower limit plate are respectively provided with a plurality of first limit grooves (49) extending in the front-to-back direction; The first limiting groove (49) corresponds to the first limiting wheel (47) one by one, and the first limiting wheel (47) is limited in the corresponding first limiting groove (49); The walking unit further includes: a second linear motor (50) for driving the first limiting frame (48) to move in the left-right direction; The movement of the second linear motor (50) is synchronized with the movement of the first linear motor (46).

8. The surface treatment device for a printed circuit board according to any one of claims 1 to 5, characterized in that: The vertical frame (2) of the second reciprocating unit (8) is provided with a second shaft (51) extending backward at the rear side; The second shaft (51) is in transmission connection with the second crankshaft (53) via a second connecting rod (52); The second power source (9) is a second servo motor that drives the second crankshaft (53) to rotate; The second shaft (51) is limited to the second guide sleeve (55); The second guide sleeve (55) and the second power source (9) are both mounted on the second loading platform (56).

9. The surface treatment device for a printed circuit board according to claim 8, characterized in that: The vertical frame (2) of the second reciprocating unit (8) is provided with second limiting wheels (57) at the upper and lower ends of the front side, and is adapted to fit a second limiting frame (58); The second limiting frame (58) comprises: a second upper limiting plate, a second lower limiting plate, and a second connecting plate connecting the second upper limiting plate and the second lower limiting plate; The bottom of the second upper limit plate and the top of the second lower limit plate are respectively provided with a plurality of second limit grooves (59) extending in the front-to-back direction; The second limiting grooves (59) correspond one to one with the second limiting wheels (57), and the second limiting wheels (57) are limited in the corresponding second limiting grooves (59).

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