Surface treatment device for printed circuit board

Abstract

The invention provides a surface treatment device for a printed circuit board, and relates to the technical field of grinding and polishing equipment. The surface treatment device aims to solve the technical problems that an existing surface treatment device for the printed circuit board is uneven in grinding and polishing effect and low in machining efficiency. According to the technical scheme, the surface treatment device for the printed circuit board comprises a plurality of treatment mechanisms; the processing mechanism comprises two vertical frames which are opposite left and right; a processing area is formed between two vertical frames of the processing mechanism, and grinding tools are arranged on the sides, facing the processing area, of the vertical frames. The processing area is matched with a limiting unit; the vertical frame on the left side in each processing mechanism forms a component part of a first reciprocating unit which reciprocates back and forth; the vertical frame located on the right side of each processing mechanism forms a constituent part of a second reciprocating unit which reciprocates back and forth. According to the invention, the printed circuit board is vertically placed, and the grinding tool performs batch grinding and polishing in a linear reciprocating motion mode, 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 invention relates to the technical field of grinding and polishing equipment, and particularly to a surface treatment device for printed circuit boards. Background Art

[0002] A printed circuit board is an important electronic component, a support for electronic components, and a carrier for realizing electrical connection of electronic components. In the process of processing a printed circuit board, in order to remove fine burrs, oxide layers, and various impurities on the board surface, it is often necessary to perform surface treatment on the printed circuit board by means of grinding, polishing, etc., so as to lay a foundation for subsequent processing operations.

[0003] When the existing surface treatment device processes a printed circuit board, most of them perform operations such as grinding and polishing with the printed circuit board placed flat. It has the following problems: If grinding and polishing are carried out simultaneously on both sides, the grinding and polishing effect may be uneven, such as over-grinding of the lower surface or lack of grinding of the upper surface; if single-sided grinding and polishing are adopted, two grinding and polishing operations are required, which will reduce the processing efficiency. In addition, for the existing surface treatment device, usually only one printed circuit board can be processed at the same time, and its processing efficiency needs to be improved. Summary of the Invention

[0004] The purpose of the present invention is to provide a surface treatment device for printed circuit boards, which places the printed circuit board vertically and makes the grinding tool perform grinding or polishing in a linear reciprocating motion manner, so that the processing quality of the printed circuit board can be more stable and uniform; in addition, its structure is compact, and it can process multiple printed circuit boards at the same time, improving the processing efficiency of the printed circuit board.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: A surface treatment device for printed circuit boards, comprising: a plurality of processing mechanisms distributed in the left-right direction; each processing mechanism includes: two vertical frames opposite to each other left and right; there is a gap forming a processing area between the two vertical frames of the processing mechanism, and a grinding tool is provided on the side of the vertical frame facing the processing area; a limiting unit adapted to limit the printed circuit board in the processing area; the vertical frame located on the left side in each processing mechanism constitutes a part of the first reciprocating unit; the first reciprocating unit is adapted to a first power source for driving it to reciprocate in the front-rear direction, and a traveling unit for driving it to move left and right; the vertical frame located on the right side in each processing mechanism constitutes a part of the second reciprocating unit; the second reciprocating unit is adapted to a second power source for driving it to reciprocate in the front-rear direction.

[0006] Optionally, the limiting unit includes: a limiting member, and a third power source for driving the limiting member to move up and down; the limiting member includes: 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 respectively limit the front and rear edges of the printed circuit board.

[0007] Optionally, the grinding tool is a flexible strip; two winding and unwinding units are provided on one side of the vertical frame facing away from the processing area to respectively tension the front and rear ends of the grinding tool; the vertical frame includes: a bottom frame, and a plate frame installed on the bottom frame; the bottom frame includes: a bottom beam extending in the front-rear direction, and vertical beams located at both ends of the bottom beam and extending upward; the plate frame includes: a vertical plate, and a top beam located at the top of the vertical plate; the front and rear ends of the top beam extend beyond the vertical plate and are respectively detachably connected to the tops of the two vertical beams; the vertical plate supports the side of the grinding tool facing away from the processing area; a gap for the grinding tool to pass through is provided between the vertical plate and the vertical beam.

[0008] Optionally, the winding and unwinding unit includes: an upper pedestal provided with an upper turntable, a lower pedestal provided with a lower turntable, a main shaft installed between the upper turntable and the upper turntable, and a third servo motor for driving the lower turntable to rotate; prism heads are respectively provided at the upper and lower ends of the main shaft, and prism grooves for cooperating with the prism heads are respectively provided on the upper turntable and the lower turntable; the main shaft is axially split into two half shafts, and an elastic layer is provided at the section to clamp the ends of the grinding tool by the two half shafts; the lower pedestal is fixedly connected to the side of the bottom beam facing away from the processing area; the top beam is provided with a limiting portion for limiting the front and rear sides of the upper pedestal to form a clamping groove for cooperating with the upper pedestal; the limiting portion is provided with a pin hole penetrating through the front and rear, and the upper pedestal is provided with a positioning hole corresponding to the pin hole; a positioning pin and a spring for pushing the positioning pin into the positioning hole are provided in the pin hole; an electromagnet for sucking the positioning pin out of the positioning hole is provided on one side of the limiting portion facing away from the upper pedestal.

[0009] Optionally, a spraying member is installed on the vertical frame; the spraying member includes: a plurality of spraying pipes extending in the up-down direction, and a cross beam connecting 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 a gap for the grinding tool to pass through is provided between the spraying pipes and the columns; the top beam is provided with a groove for installing the cross beam, and a limiting opening extending downward from the groove to the opening is provided; the width of the limiting opening is adapted to the width of the spraying pipe; a plurality of spraying holes are provided on the side of the spraying pipe facing the processing area.

[0010] Optionally, the bottom beam is provided with a water inlet channel extending in the front-rear direction, and a water inlet interface is provided 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 corresponding positioning groove.

[0011] Optionally, a 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 installed on a first loading platform; the traveling unit includes: a first linear motor for driving the first loading platform to move in the left-right direction.

[0012] Optionally, the vertical frame of the first reciprocating unit is respectively installed with first limiting wheels at the upper and lower ends at the rear side and is adapted to a first limiting frame; the first limiting frame includes: 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; multiple first limiting grooves extending in the front-rear direction are respectively arranged at the bottom of the first upper limiting plate and the top of the first lower limiting plate; the first limiting grooves correspond to the first limiting wheels one by one, and the first limiting wheels are limited in the corresponding first limiting grooves; the traveling unit further includes: a second linear motor for driving the first limiting frame to move in the left-right direction; the action of the second linear motor is synchronized with the action of the first linear motor.

[0013] Optionally, a 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 installed on a second loading platform.

[0014] Optionally, the vertical frame of the second reciprocating unit is respectively installed with second limiting wheels at the upper and lower ends at the front side and is adapted to a second limiting frame; the second limiting frame includes: 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; multiple second limiting grooves extending in the front-rear direction are respectively arranged at the bottom of the second upper limiting plate and the top of the second lower limiting plate; the second limiting grooves correspond to the second limiting wheels one by one, and the second limiting wheels are limited in the corresponding second limiting grooves.

[0015] The working principle of the present invention is as follows: The walking unit is made to drive the first reciprocating unit to move, so that the vertical frame of the first reciprocating unit moves away from the vertical frame of the second reciprocating unit, and thus the width of the processing area can be enlarged; 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 is made to drive the first reciprocating unit to move, so that the vertical frame of the first reciprocating unit approaches the vertical frame of the second reciprocating unit, reducing the width of the processing area; and the first power source is made to drive the vertical frame of the first reciprocating unit to reciprocate in the front-back direction, and the second power source is made to drive the vertical frame of the second reciprocating unit to reciprocate in the front-back direction; thus, the grinding tools mounted on the vertical frame can grind or polish both sides of the printed circuit board. After the surface treatment is completed, the walking unit is made to drive the first reciprocating unit to move, so that the vertical frame of the first reciprocating unit moves away from the vertical frame of the second reciprocating unit, enlarging the width of the processing area; in this way, the printed circuit board that has completed the surface treatment can be taken out of the processing area and a new printed circuit board can be placed in it.

[0016] It can be seen from this that the beneficial effects of the present invention are as follows: The printed circuit board is placed vertically, and the grinding tools perform grinding or polishing in a linear reciprocating motion; compared with the prior art in which the printed circuit board is placed horizontally for grinding or polishing, the present invention can allow the grinding tools to apply greater pressure to the printed circuit board, and at the same time can ensure the stable and uniform surface processing quality of the printed circuit board, and there will be no over-grinding of the lower surface. In addition, the structure of the present invention is more compact, and it can process multiple printed circuit boards simultaneously, improving the processing efficiency of the printed circuit boards. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram of the present invention; Figure 2 It is a schematic structural diagram of the processing mechanism; Figure 3 It is a schematic diagram of the vertical frame arrangement of the first reciprocating unit; Figure 4 It is a schematic diagram of the vertical frame arrangement of the second reciprocating unit; Figure 5 It is a schematic structural diagram of the limiting unit limiting the printed circuit board; Figure 6 It is a schematic diagram of the grinding tools arranged on the vertical frame; Figure 7 It is an assembly schematic diagram of the winding and unwinding unit; Figure 8Schematic diagram of the arrangement of the positioning pin and spring for the retracting and extending unit; Figure 9 Schematic diagram of the structure of the vertical frame; Figure 10 Assembly schematic diagram of the bottom frame, plate frame, and spraying member; Figure 11 Schematic diagram of the structure of the bottom frame; Figure 12 Schematic diagram of the structure of the plate frame; Figure 13 Schematic diagram of the structure of the spraying member; Figure 14 Schematic diagram of the first reciprocating unit cooperating with the first limiting frame; Figure 15 Schematic diagram of the first reciprocating unit cooperating with the traveling unit; Figure 16 Schematic diagram of the second reciprocating unit cooperating with the second limiting frame.

[0019] Reference numerals: 1, processing mechanism; 2, vertical frame; 3, processing area; 4, grinding tool; 5, limiting unit; 6, first reciprocating unit; 7, first power source; 8, second reciprocating unit; 9, second power source; 10, limiting member; 11, third power source; 12, retracting and extending unit; 13, bottom frame; 14, plate frame; 15, bottom beam; 16, vertical beam; 17, vertical plate; 18, top beam; 19, upper pedestal; 20, lower turntable; 21, lower pedestal; 22, main shaft; 23, third servo motor; 24, half shaft; 25, limiting portion; 26, pin hole; 27, positioning hole; 28, positioning pin; 29, spring; 30, electromagnet; 31, spraying member; 32, spraying pipe; 33, cross beam; 34, opening; 35, column; 36, groove; 37, water inlet interface; 38, socket; 39, positioning head; 40, positioning groove; 41, first shaft rod; 42, first connecting rod; 43, first crankshaft; 44, first guide sleeve; 45, first loading platform; 46, first linear motor; 47, first limiting wheel; 48, first limiting frame; 49, first limiting groove; 50, second linear motor; 51, second shaft rod; 52, second connecting rod; 53, second crankshaft; 54, upper turntable; 55, second guide sleeve; 56, second loading platform; 57, second limiting wheel; 58, second limiting frame; 59, second limiting groove; 60, lifting seat. Detailed implementation manners

[0020] In the following text, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and the description are regarded as being essentially exemplary rather than restrictive.

[0021] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the attached Figure 1 figure, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0022] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0023] In the present invention, unless otherwise clearly specified and limited, terms such as "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0025] Embodiment 1

[0026] As Figures 1 to 5 shown, the embodiment of the present invention provides a surface treatment device for a printed circuit board. The surface treatment device includes: a plurality of processing mechanisms 1 distributed in the left-right direction. The processing mechanism 1 includes: two vertical frames 2 opposite to each other in the left-right direction. There is a gap forming a processing area 3 between the two vertical frames 2 of the processing mechanism 1, 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 a limiting unit 5 for limiting the printed circuit board. The vertical frame 2 on the left side in each processing mechanism 1 constitutes a part of the first reciprocating unit 6. The first reciprocating unit 6 is adapted to a first power source 7 for driving it to reciprocate in the front-rear direction, and a traveling unit for driving it to move left and right. The vertical frame 2 on the right side in each processing mechanism 1 constitutes a part of the second reciprocating unit 8. The second reciprocating unit 8 is adapted to a second power source 9 for driving it to reciprocate in the front-rear direction.

[0027] It should be understood that the vertical frame 2 on the left side in each processing mechanism 1 constitutes a part of the first reciprocating unit 6; by driving the first reciprocating unit 6 to move left and right through the traveling mechanism, the gap size between the two vertical frames 2 in the processing mechanism 1 can be adjusted, so as to adjust the width of the processing area 3. Place the printed circuit board in the processing area 3, and limit the edge of the printed circuit board through the limiting unit 5. Drive the first reciprocating unit 6 to move by the traveling unit, so that the vertical frame 2 of the first reciprocating unit 6 approaches the vertical frame 2 of the second reciprocating unit 8, narrowing the width of the processing area 3; and drive the vertical frame 2 of the first reciprocating unit 6 to reciprocate in the front-rear direction by the first power source 7, and drive the vertical frame 2 of the second reciprocating unit 8 to reciprocate in the front-rear direction by the second power source 9; then the abrasive tool 4 installed on the vertical frame 2 can polish or buff both sides of the printed circuit board. After the surface treatment is completed, drive the first reciprocating unit 6 to move by the traveling unit, so that the vertical frame 2 of the first reciprocating unit 6 moves away from the vertical frame 2 of the second reciprocating unit 8, expanding the width of the processing area 3; in this way, the printed circuit board that has completed the surface treatment can be taken out of the processing area 3 and a new printed circuit board can be placed. In the present invention, the printed circuit board is placed vertically, and the abrasive tool 4 performs polishing or buffing in a linear reciprocating motion; compared with the prior art where the printed circuit board is placed horizontally for polishing or buffing, the present invention can allow the abrasive tool 4 to apply a greater pressure to the printed circuit board, and at the same time ensure the stable and uniform surface processing quality of the printed circuit board, and there will be no over-polishing of the lower surface. In addition, the structure of the present invention is more compact, can process multiple printed circuit boards at the same time, and improves the processing efficiency of the printed circuit board. The present invention is also convenient to cooperate with the gripping device and the upstream and downstream processing devices, which is beneficial to improving the mechanization degree and automation level of the printed circuit board processing. In addition, in addition to the printed circuit board, the present invention can also be used for polishing or buffing other plates.

[0028] Embodiment 2

[0029] As Figure 5 shown, on the basis of Embodiment 1, the limiting unit 5 includes: 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 includes: 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 respectively limit the front and rear edges of the printed circuit board.

[0030] It should be understood that by moving the limiting member 10 upward, the printed circuit board placed on the limiting member 10 can extend upward from the processing area 3, and the printed circuit board can be replaced; by moving the limiting member 10 downward, the printed circuit board can be completely received into the processing area 3, and the surface treatment of the printed circuit board can be carried out. 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 a steel plate; the lower ends of the limiting members 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, driving the limiting members 10 to move up and down synchronously. The third power source 11 can be set as a cylinder or a linear motor. In addition, to reduce the load on the limiting member 10, the two vertical frames 2 of the processing mechanism 1 can be made to move in opposite directions.

[0031] Embodiment 3

[0032] As Figure 2 、 Figure 6 、 Figures 9 to 12 shown, on the basis of Embodiment 1 or Embodiment 2, the grinding tool 4 is a flexible strip; two winding and unwinding units 12 are provided on the side of the vertical frame 2 facing away from the processing area 3 to tension the front and rear ends of the grinding tool 4 respectively; the vertical frame 2 includes: a bottom frame 13 and a plate frame 14 installed on the bottom frame 13; the bottom frame 13 includes: 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 includes: a vertical plate 17 and a top beam 18 located at the top of the vertical plate 17; 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 respectively; the vertical plate 17 supports the side of the grinding tool 4 facing away from the processing area 3; there is a gap between the vertical plate 17 and the vertical beam 16 for the grinding tool 4 to pass through.

[0033] It should be understood that, according to requirements, sandpaper or polishing cloth is usually selected as the grinding tool 4. The front and rear ends of the grinding tool 4 can pass through the gap between the vertical plate 17 and the vertical beam 16 and are respectively installed on the winding and unwinding units 12 on the back of the vertical frame 2 and tensioned. The vertical plate 17 supports the back of the grinding tool 4. The top beam 18 and the vertical beam 16 can be connected by bolts.

[0034] Embodiment 4

[0035] As Figures 6 to 9As shown in the figure, on the basis of Embodiment 3, the winding and unwinding unit 12 includes: an upper pedestal 19 provided with an upper turntable 54, a lower pedestal 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; both the upper and lower ends of the main shaft 22 are provided with prism heads, and the upper turntable 54 and the lower turntable 20 are respectively provided with prism grooves matching the prism heads; the main shaft 22 is axially split into two half shafts 24, and an elastic layer is provided on the section to clamp the end of the grinding tool 4 by the two half shafts 24; 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 sides of the upper pedestal 19 to form a clamping groove matching the upper pedestal 19; the limiting portion 25 is provided with a pin hole 26 penetrating through the front and rear, 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; on the side of the limiting portion 25 facing away from the upper pedestal 19, an electromagnet 30 for sucking the positioning pin 28 out of the positioning hole 27 is provided.

[0036] It should be understood that one of the winding and unwinding units 12 can be used as a winding unit for winding the grinding tool 4; the other winding and unwinding unit 12 can be used as an unwinding unit for unwinding the grinding tool 4; every once in a while, the unwinding unit can be made to unwind a section of unused grinding tool 4, and the winding unit can be made to wind a section of used grinding tool 4; in this way, the working section of the grinding tool 4 can be updated regularly. In addition, when the entire roll of grinding tool 4 is used up, the main shaft 22 of the unwinding unit can be removed, the tail end of the old grinding tool 4 can be loosened, the tail end of the new grinding tool 4 can be clamped between the two half shafts 24, the new grinding tool 4 can be wound around the main shaft 22, and the head end of the new grinding tool 4 can be connected to the tail end of the old grinding tool 4 by means of bonding or the like; then the main shaft 22 can be installed back into the unwinding unit, and the winding unit can be made to wind the grinding tool 4, so that the head end of the new grinding tool 4 can be pulled to the winding unit. Finally, the main shaft 22 of the winding unit can be removed, the old grinding tool 4 can be disassembled, and the head end of the new grinding tool 4 can be clamped between the two half shafts 24, and then the main shaft 22 can be installed back into the winding unit. In this way, the replacement of the grinding tool 4 can be completed. By using the winding and unwinding unit 12, a very long section of the grinding tool 4 can be stored at one time, greatly reducing the replacement frequency of the grinding tool 4; and the working section of the grinding tool 4 can be replaced conveniently and quickly. The positioning pin 28 is made of ferromagnetic material. By energizing the electromagnet 30, the positioning pin 28 can be sucked out of the positioning hole 27, so that the upper pedestal 19 can be taken away upward; in this way, the main shaft 22 of the winding and unwinding unit 12 can be disassembled.

[0037] Embodiment 5

[0038] As Figure 6 、 Figure 7 、 Figure 9 、 Figure 10 、 Figure 12 、 Figure 13As shown, on the basis of Embodiment 3 or Embodiment 4, a spraying member 31 is installed on the vertical frame 2; the spraying member 31 includes: a plurality of spraying pipes 32 extending in the up and down direction, and a cross beam 33 connecting and closing the upper ends of the spraying pipes 32; the plate frame 14 is provided with an opening 34 for accommodating the spraying pipes 32, and the opening 34 divides the vertical plate 17 into a plurality of columns 35; the spraying pipes 32 support the side of the grinding tool 4 facing the processing area 3, and there is a gap for the grinding tool 4 to pass between the spraying pipes 32 and the columns 35; the top beam 18 is provided with a groove 36 for installing the cross beam 33, and a limiting port extending downward from the groove 36 to the opening 34; the width of the limiting port is adapted to the width of the spraying pipe 32; the spraying pipes 32 are provided with a plurality of spray holes on the side facing the processing area 3.

[0039] It should be understood that the spraying pipes 32 are arranged between the columns 35. The columns 35 support the side of the grinding tool 4 facing away from the processing area 3, and the spraying pipes 32 support the side of the grinding tool 4 facing the processing area 3; the grinding tool 4 is made to bypass each column 35 and each spraying pipe 32 in a winding manner, so that the grinding tool 4 can be tightened more tightly on the surface of the column 35, which is beneficial to improving the surface processing quality of the printed circuit board. In addition, every time the grinding tool 4 grinds or polishes back and forth in the front and back direction, the spraying pipes 32 will spray water mist on the surface of the printed circuit board once, which can not only perform wet grinding on the printed circuit board, but also clean the debris on the surface of the printed circuit board in time; the printed circuit board is placed vertically, and the water flow can quickly flow down and carry away the debris. In the front and back direction, the width of the spraying pipe 32 is less than half of the width of the column 35, and the width of the column 35 is less than the maximum stroke length of the reciprocating movement of the vertical frame 2. The cross beam 33 can be installed in the groove 36 of the top beam 18 by bolts.

[0040] Embodiment 6

[0041] As Figures 9 to 13 shown, on the basis of Embodiment 5, the bottom beam 15 is provided with a water inlet channel extending in the front and back direction, and a water inlet interface 37 is arranged 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 spraying 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.

[0042] It should be understood that the bottom beam 15 positions the lower end of the spraying pipe 32 through the socket 38 and positions the lower end of the column 35 through the positioning groove 40, which can improve the installation accuracy of the column 35 and the spraying pipe 32 and prevent the column 35 and the spraying pipe 32 from being skewed and deformed after long-term use. The water inlet interface 37 can be connected to a water source through a hose, and the spraying pipes 32 converge into the water inlet channel connected to the water inlet interface 37, which is beneficial to reducing the number of hoses and making the structure of the present invention more simplified and compact.

[0043] Example 7

[0044] As Figure 3 、 Figure 14 、 Figure 15 shown, on the basis of any one of Embodiments 1 to 6, a vertical frame 2 of the first reciprocating unit 6 is provided with a first shaft rod 41 extending forward on 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; both the first guide sleeve 44 and the first power source 7 are installed on a first carrier 45; the traveling unit includes: a first linear motor 46 for driving the first carrier 45 to move in the left - right direction.

[0045] It should be understood that by driving the first crankshaft 43 to rotate through the first servo motor, the vertical frame 2 of the first reciprocating unit 6 can be driven to reciprocate in the front - back direction; compared with driving by a cylinder or a linear motor, the reciprocating frequency can be greatly increased, thereby greatly improving the processing efficiency. The vertical frame 2 of the first reciprocating unit 6 can set the water inlet interface 37 on the front side of the bottom beam 15. In addition, by making the traveling unit drive the first carrier 45 to move left and right, the vertical frame 2 of the first reciprocating unit 6 can be driven to move left and right, so as to adjust the width of the processing area 3. The first guide sleeve 44 can be installed on the first carrier 45 through a first socket which is buckled up and down.

[0046] Example 8

[0047] As Figure 3 、 Figure 14 、 Figure 15 shown, on the basis of Example 7, the vertical frame 2 of the first reciprocating unit 6 is respectively installed with first limit wheels 47 at the upper and lower ends on the rear side and is adapted to a first limit frame 48; the first limit frame 48 includes: a first upper limit plate, a first lower limit plate, and a first connecting plate connecting the first upper limit plate and the first lower limit plate; multiple first limit grooves 49 extending in the front - back direction are respectively provided at the bottom of the first upper limit plate and the top of the first lower limit plate; the first limit grooves 49 correspond to the first limit wheels 47 one by one, and the first limit wheels 47 are limited in the corresponding first limit grooves 49; the traveling unit further includes: a second linear motor 50 for driving the first limit frame 48 to move in the left - right direction; the action of the second linear motor 50 is synchronized with the action of the first linear motor 46.

[0048] It should be understood that for the vertical frame 2 of the first reciprocating unit 6, a first shaft rod 41 extending forward is provided on the front side, and the moving direction is restricted to the front-back direction through a first guide sleeve 44; for the vertical frame 2 of the first reciprocating unit 6, a first limiting wheel 47 is installed on the rear side, and the moving direction is restricted to the front-back direction through 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, by making the traveling unit drive the first carrier 45 and the first limiting frame 48 to move synchronously in the left-right direction, the vertical frame 2 of the first reciprocating unit 6 can be driven to move left and right, so as to adjust the width of the processing area 3.

[0049] Embodiment 9

[0050] As Figure 4 、 Figure 16 shown, on the basis of any one of Embodiments 1 to 8, for the vertical frame 2 of the second reciprocating unit 8, a second shaft rod 51 extending backward is provided on 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; both the second guide sleeve 55 and the second power source 9 are installed on a second carrier 56.

[0051] It should be understood that by driving the second crankshaft 53 to rotate through the second servo motor, the vertical frame 2 of the second reciprocating unit 8 is driven to reciprocate in the front-back direction; compared with driving by a cylinder or a linear motor, the reciprocating frequency can be greatly increased, so that the processing efficiency is greatly improved. For the vertical frame 2 of the second reciprocating unit 8, the water inlet interface 37 can be arranged at the rear side of the bottom beam 15. The second guide sleeve 55 can be installed on the second carrier 56 through an upper and lower buckled second seat.

[0052] Embodiment 10

[0053] As Figure 4 、 Figure 16 shown, on the basis of Embodiment 9, for the vertical frame 2 of the second reciprocating unit 8, second limiting wheels 57 are respectively installed at the upper and lower ends on the front side and are adapted to a second limiting frame 58; the second limiting frame 58 includes: 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; a plurality of second limiting grooves 59 extending in the front-back direction are respectively arranged at the bottom of the second upper limiting plate and the top of the second lower limiting plate; 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.

[0054] It should be understood that the vertical frame 2 of the second reciprocating unit 8 is provided with a second shaft rod 51 extending backward at the rear side, and the movable direction is restricted to the front-rear direction through the second guide sleeve 55; the vertical frame 2 of the second reciprocating unit 8 is installed with a second limiting wheel 57 at the front side, and the movable direction is restricted to the front-rear direction through the second limiting frame 58; in this way, the vertical frame 2 of the second reciprocating unit 8 can move more stably in the front-rear direction.

[0055] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that various changes or modifications can be made to these embodiments without departing from the principle and essence of the present invention, and these changes and modifications all fall within the protection scope of the present invention.

Claims

1. Surface treatment device for printed circuit board, characterized in that: It includes: A plurality of processing mechanisms (1) distributed in the left - right direction; The processing mechanism (1) includes: two vertical frames (2) opposite to each other in the left - right direction; There is a gap forming a processing area (3) between the two vertical frames (2) of the processing mechanism (1), and a grinding tool (4) is provided on the side of the vertical frame (2) facing the processing area (3); A limiting unit (5) adapted to limit the printed circuit board in the processing area (3); The vertical frame (2) on the left side in each processing mechanism (1) constitutes a part of the first reciprocating unit (6); the first reciprocating unit (6) is adapted to be driven by a first power source (7) to reciprocate in the front - back direction, and a traveling unit for driving it to move left - right; The vertical frame (2) on the right side in each processing mechanism (1) constitutes a part 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.

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

3. The surface treatment device for printed circuit board according to claim 2, characterized in that: The grinding tool (4) is a flexible strip; Two winding and unwinding units (12) are provided on the side of the vertical frame (2) facing away from the processing area (3), and respectively tension the front and rear ends of the grinding tool (4); The vertical frame (2) includes: a bottom frame (13), a plate frame (14) installed on the bottom frame (13); The bottom frame (13) includes: a bottom beam (15) extending in the front - back direction, and vertical beams (16) extending upward at both ends of the bottom beam (15); The plate frame (14) includes: a vertical plate (17), a top beam (18) located at the top of the vertical plate (17); 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) respectively; The vertical plate (17) supports the side of the grinding tool (4) facing away from the processing area (3); there is a gap for the grinding tool (4) to pass between the vertical plate (17) and the vertical beam (16).

4. The surface treatment device for printed circuit board according to claim 3, characterized in that: The winding and unwinding unit (12) includes: an upper pedestal (19) provided with an upper turntable (54), a lower pedestal (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; Prismatic heads are respectively provided at the upper and lower ends of the main shaft (22), and prismatic grooves cooperating with the prismatic heads are respectively provided on the upper turntable (54) and the lower turntable (20); The main shaft (22) is axially split into two half shafts (24), and an elastic layer is provided at the section to clamp the ends of the two half shafts (24) against the abrasive tool (4); 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) that limits the front and rear sides of the upper pedestal (19) to form a clamping groove that cooperates with the upper pedestal (19); The limiting portion (25) is provided with a pin hole (26) penetrating through the front and rear, 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); On one side of the limiting portion (25) facing away from the upper pedestal (19), an electromagnet (30) for sucking the positioning pin (28) out of the positioning hole (27) is provided.

5. The surface treatment device for a printed circuit board according to claim 4, characterized in that: The vertical frame (2) is installed with a spraying member (31); The spraying member (31) includes: a plurality of spraying pipes (32) extending in the up and down direction, and a cross beam (33) connecting and closing the upper ends of the spraying pipes (32); The plate frame (14) is provided with an opening (34) for accommodating the spraying pipes (32), and the opening (34) divides the vertical plate (17) into a plurality of columns (35); The spraying pipes (32) support the side of the abrasive tool (4) facing the processing area (3), and there is a gap for the abrasive tool (4) to pass through between the spraying pipes (32) and the columns (35); The top beam (18) is provided with a groove (36) for installing the cross beam (33), and a limiting port extending downward from the groove (36) to the opening (34); the width of the limiting port is adapted to the width of the spraying pipe (32); The spraying pipes (32) are provided with a plurality of spraying holes on the side facing the processing area (3).

6. The surface treatment device for a printed circuit board according to claim 5, characterized in that: The bottom beam (15) is provided with a water inlet channel extending in the front and rear directions, 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 connect with the lower end of the spraying 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).

7. The surface treatment device for a printed circuit board according to any one of claims 1 to 6, characterized in that: The vertical frame (2) of the first reciprocating unit (6) is provided with a first shaft rod (41) extending forward on the front side; The first shaft rod (41) is drivingly connected to 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 installed on the first carrier (45); The walking unit includes: a first linear motor (46) that drives the first loading platform (45) to move in the left-right direction.

8. The surface treatment device for a printed circuit board according to claim 7, wherein: For the vertical frame (2) of the first reciprocating unit (6), first limiting wheels (47) are respectively installed at the upper and lower ends of the rear side, and are adapted to a first limiting frame (48); The first limiting frame (48) includes: 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; Multiple first limiting grooves (49) extending in the front-rear direction are respectively provided at the bottom of the first upper limiting plate and the top of the first lower limiting plate; 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 includes: a second linear motor (50) that drives the first limiting frame (48) to move in the left-right direction; The operation of the second linear motor (50) is synchronized with the operation of the first linear motor (46).

9. The surface treatment device for a printed circuit board according to any one of claims 1 to 6, wherein: For the vertical frame (2) of the second reciprocating unit (8), a second shaft rod (51) extending backward is provided 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 that drives 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 installed on the second loading platform (56).

10. The surface treatment device for a printed circuit board according to claim 9, wherein: For the vertical frame (2) of the second reciprocating unit (8), second limiting wheels (57) are respectively installed at the upper and lower ends of the front side, and are adapted to a second limiting frame (58); The second limiting frame (58) includes: 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; Multiple second limiting grooves (59) extending in the front-rear direction are respectively provided at the bottom of the second upper limiting plate and the top of the second lower limiting plate; 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).

Images