Flatness detection device for solder paste printing scraper

Abstract

According to the flatness detection device for the solder paste printing scraper, detection powder is uniformly laid on a movable bearing plane, then certain pressure is applied to the solder paste printing scraper, and the flatness of the solder paste printing scraper is judged by judging the amount of the detection powder passing through the bottom of the solder paste printing scraper.

Description

Technical Field

[0001] The utility model relates to the technical field of flatness detection of solder paste printing scrapers, in particular to a flatness detection device for solder paste printing scrapers. Background Art

[0002] There are many processes in SMT patch processing. Solder paste printing, also known as SMT solder paste printing process, is one of the commonly used processes. The principle of solder paste printing is to use a solder paste printing scraper to evenly print the solder paste on the pad of the PCB board. Only after the solder paste printing is completed can the SMT patch processing officially begin.

[0003] The current solder paste printing scraper, after being used for a long time, the blade is prone to unevenness due to extrusion and friction, and then the flatness of the solder paste printing scraper needs to be detected. In order to improve the detection efficiency, the prior art uses a plane mechanism to align with the solder paste printing scraper, and observes whether there is a gap by naked eyes. However, when the gap is small or the curvature of the gap is reduced, it cannot be easily seen by the naked eye, resulting in uneven solder paste scraper, affecting the overall quality of the circuit board. Therefore, the prior art also uses sensors and infrared lamps to detect solder paste printing scrapers. After the sensor senses the solder paste printing scraper, the infrared lamp is started, so that the infrared lamp irradiates infrared light to the bottom of the scraper. When there is a small gap on the scraper, the infrared light can pass between the scraper and the flat plate, and the light diffraction is used to make the light diverge outward, and the personnel can see the red light. When the scraper is completely flat, the scraper and the flat plate are completely sealed, and the personnel cannot see the red light. However, this method has a high detection cost and a cumbersome detection process. Utility Model Content

[0004] In order to solve the problem in the prior art that the flatness detection of solder paste printing scrapers is cumbersome and costly, the utility model provides a flatness detection device for solder paste printing scrapers. The device evenly spreads detection powder on a movable bearing plane, then applies a certain pressure to the solder paste printing scraper, and judges the flatness of the solder paste printing scraper by judging the amount of detection powder passing through the bottom of the solder paste printing scraper.

[0005] The utility model adopts the following technical solution to solve the above-mentioned technical problems: a flatness detection device for a solder paste printing scraper, comprising a conveying mechanism and a loading mechanism arranged above the conveying mechanism, the conveying mechanism comprising a movable bearing plane, on which detection powder is evenly spread, the loading mechanism comprising a mounting seat, a loading member and two first limit plates, a lifting plate and a lifting screw for driving the lifting plate to move are arranged on the mounting seat, the lifting screw is rotatably connected to the mounting seat, the loading member is fixedly arranged on the lifting plate, and during the movement of the lifting plate, the loading member can be driven to squeeze the blade holder of the scraper so that the blade of the scraper is against the bearing plane, the two first limit plates are arranged on the mounting seat, and a accommodating space for accommodating the scraper is formed between the two first limit plates, and the first limit plate can fit with the tin blocking plate of the scraper.

[0006] As a further optimization of the flatness detection device of a solder paste printing scraper of the utility model: the conveying mechanism includes a belt, a pulley cooperating with the belt and a mounting frame for supporting the pulley, the upper surface of the belt forms the bearing plane, and a connecting rod is arranged on the mounting frame, the length direction of the connecting rod is perpendicular to the conveying direction of the belt, a rectangular first bearing plate is arranged at one end of the connecting rod close to the belt, and the length of the first bearing plate is greater than the length of the blade, and the first bearing plate extends to the inner side of the belt to support the bearing plane.

[0007] As a further optimization of the flatness detection device of the solder paste printing scraper of the utility model: the mounting frame includes two horizontally arranged second support rods, each of the two ends of the second support rods is connected to a connecting block, the connecting block is used to connect the roller shaft of the pulley, and the second support rod is vertically fixedly connected to a first support rod for supporting the second support rod.

[0008] As a further optimization of the flatness detection device of a solder paste printing scraper of the utility model: the conveying mechanism includes a support plate and a second bearing plate movably arranged on the support plate, the upper surface of the second bearing plate forms the bearing plane, and a plurality of legs are arranged at the bottom of the support plate.

[0009] As a further optimization of the flatness detection device of the solder paste printing scraper of the utility model: the loading part is set as a pointer-type push-pull force gauge, the pointer-type push-pull force gauge is connected to the lifting plate through a mounting plate, and the push-pull rod of the pointer-type push-pull force gauge squeezes the tool holder.

[0010] As a further optimization of the flatness detection device of a solder paste printing scraper of the utility model: a first connecting plate and a second connecting plate are arranged on the mounting seat from top to bottom in sequence, the two ends of the lifting screw are respectively connected to the first connecting plate and the second connecting plate, a first guide rod and a second guide rod are arranged between the first connecting plate and the second connecting plate, and the first guide rod and the second guide rod both pass through the mounting plate.

[0011] As a further optimization of the flatness detection device of the solder paste printing scraper of the utility model: the two ends of the lifting screw are coaxially fixedly connected with a light rod, one of the light rods passes through the first connecting plate and is fixedly connected with a rotating handle, and the other light rod is rotatably connected to the second connecting plate.

[0012] As a further optimization of the flatness detection device of the solder paste printing scraper of the utility model: a gasket is provided at one end of the push-pull rod of the pointer-type push-pull dynamometer close to the tool holder.

[0013] As a further optimization of the flatness detection device of a solder paste printing scraper of the utility model: a slide groove is provided on the mounting seat, a limit groove is provided on the side wall of the slide groove, the first limit plate is vertically fixedly connected with the second limit plate, and the second limit plate can extend into the slide groove, the second limit plate is fixedly connected with a sliding block that can extend into the limit groove, the second limit plate is passed through a bolt, and the bolt can tighten the bottom of the slide groove to lock the second limit plate.

[0014] Beneficial effect: The utility model sets a movable carrying plane, then evenly spreads the detection powder on the carrying plane, the loader squeezes the scraper's tool holder so that the scraper's blade rests on the carrying plane, moves the carrying plane, determines the amount of detection powder passing through the blade, and determines the flatness of the blade based on this. The overall operation of the detection device is simple and the cost is not high. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the cooperation between the second limit plate and the slide groove of the utility model;

[0017] Figure 3 It is another structural schematic diagram of the utility model;

[0018] Figure numerals: 1. tool holder, 2. blade, 3. first limit plate, 4. second limit plate, 5. screw hole, 6. mounting seat, 7. slide groove, 8. loader, 9. push-pull rod, 10. gasket, 11. mounting plate, 12. second connecting plate, 13. lifting plate, 14. first guide rod, 15. second guide rod, 16. lifting screw, 17. first connecting plate, 18. rotating handle, 19. detection powder, 20. first bearing plate, 21. connecting rod, 22. belt, 23. connecting block, 24. first support rod, 25. second support rod, 26. second bearing plate, 27. support plate, 28. support leg. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further elaborated in detail below in conjunction with specific embodiments. The parts that are not described and disclosed in detail in the following embodiments of the present invention should be understood as the existing technologies known or should be known to those skilled in the art, such as the working principle of solder paste printing, the structure and model of the solder paste printing scraper, the model, structure and working principle of the lifting screw 16, the model and structure of the belt 22, etc.

[0020] Example 1

[0021] A flatness detection device for a solder paste printing scraper, such as Figure 1 As shown, it includes a conveying mechanism and a loading mechanism arranged above the conveying mechanism, the conveying mechanism includes a movable bearing plane, the bearing plane is evenly paved with detection powder 19, the loading mechanism includes a mounting seat 6, a loading member 8 and two first limit plates 3, the mounting seat 6 is provided with a lifting plate 13 and a lifting screw 16 for driving the lifting plate 13 to move, the lifting plate 13 is installed on the lifting screw 16 through a ball nut, the specific connection method between the lifting plate 13 and the lifting screw 16 is the existing technology, which will not be described in detail here, the lifting screw 16 is rotatably connected to the mounting seat 6, the loading member 8 is fixedly arranged on the lifting plate 13, and the lifting plate 13 can drive the loading member 8 to squeeze the blade holder 1 of the scraper so that the blade 2 of the scraper is against the bearing plane during the movement. The two first limit plates 3 are arranged on the mounting seat 6, and a accommodating space for accommodating the scraper is formed between the two first limit plates 3, and the first limit plate 3 can fit with the tin blocking plate of the scraper.

[0022] Place the scraper in the accommodating space, fit the first limit plate 3 with the tin baffle of the scraper, then rotate the lifting screw 16 to make the mounting seat 6 move up and down on the lifting screw 16, and then drive the loading member 8 to move until the loading member 8 squeezes the blade holder 1 of the scraper, applies a certain pressure, so that the blade 2 of the scraper is against the load-bearing plane, at this time, move the load-bearing plane, and judge the flatness of the blade 2 of the scraper according to the amount of detection powder 19 passing between the blade 2 of the scraper and the load-bearing plane. When the blade 2 is flat, the detection powder 19 will not pass between the load-bearing plane and the blade 2. When the blade 2 is uneven, the detection powder 19 will pass between the load-bearing plane and the blade 2. In order to prevent the scraper from tipping over in the accommodating space during movement, the operator can support it with his hands to ensure that the scraper does not fall.

[0023] The above is a basic implementation method of the utility model, which can be further improved, optimized and limited on the basis of the above to obtain the following embodiments:

[0024] Example 2

[0025] This embodiment is an improved solution based on the embodiment 1. Its main structure is the same as that of the embodiment 1. The improvement is as follows: Figure 1As shown, the conveying mechanism includes a belt 22, a pulley matched with the belt 22 and a mounting frame for supporting the pulley. The upper surface of the belt 22 forms the bearing plane, and the upper surface of the belt 22 refers to the surface that can contact the blade 2 of the scraper. In order to prevent the part of the belt 22 that contacts the blade 2 from sinking and affecting the flatness detection effect when the loading member 8 applies pressure to the blade holder 1 of the scraper, a connecting rod 21 is provided on the mounting frame. The length direction of the connecting rod 21 is perpendicular to the conveying direction of the belt 22. A rectangular first bearing plate 20 is provided at one end of the connecting rod 21 close to the belt 22, and the length of the first bearing plate 20 is greater than the length of the blade 2. The first bearing plate 20 extends to the inner side of the belt 22 to support the bearing plane. The mounting frame includes two horizontally arranged second support rods 25, each of which is connected to a connecting block 23 at both ends of the second support rod 25. The connecting block 23 is used to connect the roller shaft of the pulley, and the second support rod 25 is vertically fixedly connected to a first support rod 24 for supporting the second support rod 25.

[0026] Example 3

[0027] This embodiment is an improved solution based on the embodiment 1. Its main structure is the same as that of the embodiment 1. The improvement is as follows: Figure 3 As shown, the conveying mechanism includes a support plate 27 and a second bearing plate 26 movably arranged on the support plate 27. The upper surface of the second bearing plate 26 forms the bearing plane, and a plurality of legs 28 are arranged at the bottom of the support plate 27. When flatness detection is required, the second bearing plate 26 can be directly pushed manually.

[0028] Example 4

[0029] This embodiment is an improved solution based on the embodiment 1. Its main structure is the same as that of the embodiment 1. The improvement is as follows: Figure 1 and Figure 3 As shown, the loading part 8 is configured as a pointer-type push-pull force gauge, which is connected to the lifting plate 13 via a mounting plate 11. The push-pull rod 9 of the pointer-type push-pull force gauge squeezes the tool holder 1, and a gasket 10 is provided at one end of the push-pull rod 9 of the pointer-type push-pull force gauge close to the tool holder 1. Adjustment is made according to the pressure value displayed by the pointer-type push-pull force gauge to avoid the pressure being too small to play a detection role, and to avoid the pressure being too high to damage the scraper. The pointer-type push-pull force gauge is a prior art in this field, and will not be described in detail here.

[0030] Example 5

[0031] This embodiment is an improved solution based on the embodiment 4. Its main structure is the same as that of the embodiment 4. The improvement is as follows: Figure 1 and Figure 3As shown, the first connecting plate 17 and the second connecting plate 12 are sequentially arranged on the mounting seat 6 from top to bottom, and the two ends of the lifting screw 16 are respectively connected to the first connecting plate 17 and the second connecting plate 12, and the first guide rod 14 and the second guide rod 15 are arranged between the first connecting plate 17 and the second connecting plate 12, and the first guide rod 14 and the second guide rod 15 both pass through the mounting plate 11. In order to prevent the lifting screw 16 from being unable to be used normally, a light rod is coaxially fixedly connected to each end of the lifting screw 16, one of which passes through the first connecting plate 17 and is fixedly connected to a rotating handle 18. When the position of the pointer-type push-pull dynamometer needs to be adjusted, the rotating handle 18 can be directly rotated. The light rod is rotatably connected to the first connecting plate 17, and the other light rod is rotatably connected to the second connecting plate 12.

[0032] Example 6

[0033] This embodiment is an improved solution based on the embodiment 1. Its main structure is the same as that of the embodiment 1. The improvement is as follows: Figure 2 As shown, in order to ensure that the loader 8 squeezes the blade holder 1 of the scraper and the scraper will not fall over when the load plane is moved, a slide groove 7 is provided on the mounting seat 6, and a limiting groove is provided on the side wall of the slide groove 7. The first limiting plate 3 is vertically fixedly connected with the second limiting plate 4, and the second limiting plate 4 can extend into the slide groove 7. The second limiting plate 4 is fixedly connected with a sliding block that can extend into the limiting groove. Bolts are passed through the second limiting plate 4. The second limiting plate 4 is also provided with screw holes 5 for the bolts to pass through. The bolts can tighten the bottom of the slide groove 7 to lock the second limiting plate 4.

[0034] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A flatness detection device for a solder paste printing scraper, characterized in that: The invention comprises a conveying mechanism and a loading mechanism arranged above the conveying mechanism, wherein the conveying mechanism comprises a movable bearing plane, on which detection powder (19) is evenly spread, and the loading mechanism comprises a mounting seat (6), a loading member (8) and two first limiting plates (3), wherein a lifting plate (13) and a lifting screw (16) for driving the lifting plate (13) to move are arranged on the mounting seat (6), and the lifting screw (16) is rotatably connected to the mounting seat (6), and the loading member (8) is fixedly arranged on the lifting plate (13), and during the movement of the lifting plate (13), the loading member (8) can be driven to squeeze the blade holder (1) of the scraper so that the blade (2) of the scraper is against the bearing plane, and the two first limiting plates (3) are arranged on the mounting seat (6), and a receiving space for receiving the scraper is formed between the two first limiting plates (3), and the first limiting plates (3) can be fitted with the tin blocking plate of the scraper.

2. The flatness detection device for a solder paste printing scraper according to claim 1, characterized in that: The conveying mechanism comprises a belt (22), a pulley matched with the belt (22) and a mounting frame for supporting the pulley, the upper surface of the belt (22) forms the bearing plane, a connecting rod (21) is arranged on the mounting frame, the length direction of the connecting rod (21) is perpendicular to the conveying direction of the belt (22), a rectangular first bearing plate (20) is arranged at one end of the connecting rod (21) close to the belt (22), and the length of the first bearing plate (20) is greater than the length of the blade (2), and the first bearing plate (20) extends to the inner side of the belt (22) to support the bearing plane.

3. The flatness detection device for a solder paste printing scraper according to claim 2, characterized in that: The mounting frame comprises two second support rods (25) arranged horizontally, each end of the second support rod (25) is connected to a connecting block (23), the connecting block (23) is used to connect the roller shaft of the pulley, and the second support rod (25) is vertically fixedly connected to a first support rod (24) for supporting the second support rod (25).

4. The flatness detection device for a solder paste printing scraper according to claim 1, characterized in that: The conveying mechanism comprises a support plate (27) and a second bearing plate (26) movably arranged on the support plate (27); the upper surface of the second bearing plate (26) forms the bearing plane; and a plurality of legs (28) are arranged at the bottom of the support plate (27).

5. The flatness detection device for a solder paste printing scraper according to claim 1, characterized in that: The loading member is configured as a pointer-type push-pull dynamometer, which is connected to the lifting plate (13) via a mounting plate (11), and a push-pull rod (9) of the pointer-type push-pull dynamometer presses the tool holder (1).

6. The flatness detection device for a solder paste printing scraper according to claim 5, characterized in that: A first connecting plate (17) and a second connecting plate (12) are sequentially arranged on the mounting seat (6) from top to bottom, and both ends of the lifting screw (16) are respectively connected to the first connecting plate (17) and the second connecting plate (12), and a first guide rod (14) and a second guide rod (15) are arranged between the first connecting plate (17) and the second connecting plate (12), and both the first guide rod (14) and the second guide rod (15) pass through the mounting plate (11).

7. The flatness detection device for a solder paste printing scraper according to claim 6, characterized in that: Two ends of the lifting screw (16) are coaxially fixedly connected to a light rod, one of which passes through the first connecting plate (17) and is fixedly connected to a rotating handle (18), and the other light rod is rotatably connected to the second connecting plate (12).

8. The flatness detection device for a solder paste printing scraper according to claim 5, characterized in that: A gasket (10) is provided at one end of the push-pull rod (9) of the pointer-type push-pull dynamometer close to the tool holder (1).

9. The flatness detection device for a solder paste printing scraper according to claim 1, characterized in that: The mounting seat (6) is provided with a slide groove (7), a limiting groove is provided on a side wall of the slide groove (7), the first limiting plate (3) is vertically fixedly connected to the second limiting plate (4), and the second limiting plate (4) can extend into the slide groove (7), the second limiting plate (4) is fixedly connected to a sliding block that can extend into the limiting groove, and the second limiting plate (4) is penetrated by a bolt, and the bolt can press against the bottom of the slide groove (7) to lock the second limiting plate (4).

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