Device for detecting flatness of PCB press

Abstract

The utility model relates to a device for detecting the flatness of a PCB (Printed Circuit Board) press, which belongs to the technical field of PCBs and comprises a base, a hot plate is placed on the upper surface of the base, a fixing mechanism for fixing the hot plate is arranged in the base, four supporting rods are fixed on the upper surface of the base, a box body is fixed on the upper surfaces of the four supporting rods, and the box body is fixed on the lower surface of the base. A pressing mechanism is arranged in the box body, and a pressing plate is arranged on the pressing mechanism. According to the detection device for the flatness of the PCB press, a first threaded rod is driven to rotate through a pressing mechanism and a first motor, a first chain wheel is driven to rotate through the first threaded rod, the first chain wheel drives a second chain wheel and a second threaded rod to rotate together through a chain, and two moving blocks move relatively at the same time through the first threaded rod and the second threaded rod; and the moving block drives the moving plate and the pressing plate to move together through the hinge rod, the tin bar is pressed, and the thickness data of the tin bar can be conveniently recorded in the later period.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB circuit boards, in particular to a device for detecting the flatness of a PCB press. Background Art

[0002] Lamination is a key process required to produce high-layer PCBs. To ensure sufficient solidification of the lamination material, the lamination process takes a long time and is inefficient. Consequently, PCB manufacturers are constantly increasing the size of their presses and the number of carrier plates to increase production. However, due to the increased size and number of layers, the flatness of the hot platen and the uniformity of the die surface can deteriorate after repeated opening and closing. This can lead to deformation, tilting, and uneven pressure on the die. Once the flatness of the hot platen becomes abnormal, untimely processing can lead to the irreparable scrapping of entire batches of furnaces. The lack of effective process control is a pressing technical issue in this field.

[0003] The key to the uniformity of board thickness is to rely on the control of the press equipment. The effective implementation of key equipment test items is the guarantee of the stability of process product quality. The efficient and accurate test of press flatness directly affects the consistency of batch boards, the thickness of pressed boards, and the uniformity of dielectric layers. Due to the rising cost of main material boards in recent years, the improvement of inner layer yield directly affects production cost savings. The inner layer circuit production process is complicated, with a long process and many workstations. If high-precision circuits are not paid attention to, they are prone to open and short circuit defects and scrap. Therefore, a detection device for PCB press flatness is proposed to solve the above problems. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the utility model provides a device for detecting the flatness of a PCB press, which has the advantages of convenient detection and solves the problem of inconvenience in detecting the flatness of the existing PCB press.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a device for detecting the flatness of a PCB press, comprising a base, a hot plate placed on the upper surface of the base, a fixing mechanism for fixing the hot plate provided inside the base, four support rods fixed to the upper surface of the base, a box fixed to the upper surfaces of the four support rods, a pressing mechanism provided inside the box, and a pressing plate provided on the pressing mechanism;

[0006] The pressing mechanism includes a first motor fixed to the left side of the inner cavity of the box, and a first threaded rod is fixed to the output shaft of the first motor. The pressing mechanism also includes a second threaded rod rotatably connected between the left and right sides of the inner cavity of the box through a bearing seat. The outer surfaces of the first threaded rod and the second threaded rod are provided with a transmission assembly, and the outer surfaces of the first threaded rod and the second threaded rod are threadedly connected to two moving blocks, and the lower surface of the moving block is hinged to two hinged rods, and the lower surfaces of the four hinged rods are hinged to a moving plate.

[0007] Furthermore, the transmission assembly includes a first sprocket fixed to the outer surface of the first threaded rod and a second sprocket fixed to the outer surface of the second threaded rod, and the outer surfaces of the first sprocket and the second sprocket are transmission-connected with chains.

[0008] Furthermore, sliders are fixed on both the front and rear sides of the moving block, and sliding grooves are opened on both the front and rear sides of the inner cavity of the box body. The sliders are slidably connected to the inside of the sliding grooves, and the pressure plate is fixed to the lower surface of the moving plate.

[0009] Furthermore, four sliding holes are provided on the lower surface of the movable plate, and the movable plate is slidably connected to the outer surface of the support rod through the sliding holes.

[0010] Furthermore, the fixing mechanism includes a second motor fixed to the upper surface of the inner cavity of the base, the output shaft of the second motor is fixed with a rotating rod, the outer surface of the rotating rod is fixed with a gear, the outer surface of the gear is engaged with two racks, the upper surface of the rack is fixed with a vertical plate, and the two vertical plates are fixed with a clamping rod on the opposite sides. The fixing mechanism also includes two bottom blocks fixed to the lower surface of the hot plate, and the opposite sides of the two bottom blocks are provided with a clamping hole.

[0011] Furthermore, the clamping rod is slidably connected to the inside of the clamping hole, and the lower surface of the rotating rod is rotatably connected to the lower surface of the inner cavity of the base through a bearing seat.

[0012] Furthermore, two bottom holes are provided on the upper surface of the base, the bottom block is slidably connected to the inside of the bottom holes, a T-shaped block is fixed to the lower surface of the rack, and two T-shaped slots are provided on the lower surface of the inner cavity of the base, and the T-shaped block is slidably connected to the inside of the T-shaped slot.

[0013] Compared with the existing technology, the technical solution of this application has the following beneficial effects:

[0014] 1. This device for detecting the flatness of a PCB press has a pressing mechanism. The first motor drives the first threaded rod to rotate. The first threaded rod drives the second threaded rod to rotate together through a transmission assembly. The first threaded rod and the second threaded rod are used to make two moving blocks move relative to each other at the same time. The moving block drives the moving plate and the pressing plate to move together through the hinged rod to press the tin bar, which is convenient for recording the thickness data of the tin bar later.

[0015] 2. The device for detecting the flatness of a PCB press machine inserts the bottom block into the base through a fixing mechanism. The second motor drives the rotating rod and the gear to rotate together. The front rack moves to the left and the rear rack moves to the right through the gear. The rack drives the vertical plate and the clamping rod to move together, so that the clamping rod is clamped into the clamping hole to fix the hot plate, making it convenient for the pressing plate to press the tin bar on the hot plate to prevent the hot plate from moving, thereby affecting the pressing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is a three-dimensional appearance diagram of the base and hot plate of the utility model;

[0018] Figure 3 This is a schematic top view of the pressing mechanism of the present invention;

[0019] Figure 4 It is a structural diagram of the fixing mechanism of the utility model.

[0020] In the figure: 1 base, 2 fixing mechanism, 201 second motor, 202 rotating rod, 203 gear, 204 rack, 205 vertical plate, 206 clamping rod, 207 bottom block, 208 clamping hole, 3 hot plate, 4 support rod, 5 pressing mechanism, 501 first motor, 502 first threaded rod, 503 transmission assembly, 504 moving block, 505 second threaded rod, 506 hinged rod, 507 moving plate, 6 box body, 7 pressure plate. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-2 In this embodiment, a device for detecting the flatness of a PCB press includes a base 1. A hot plate 3 is placed on the upper surface of the base 1, and 12 tin bars are placed on the hot plate 3. A fixing mechanism 2 for fixing the hot plate 3 is provided inside the base 1. Four support rods 4 are fixed to the upper surface of the base 1 for fixing the hot plate 3. A box 6 is fixed to the upper surface of the four support rods 4. A pressing mechanism 5 is provided inside the box 6. The pressing mechanism 5 is provided with a pressing plate 7. The pressing mechanism 5 drives the pressing plate 7 to move to press the tin bars.

[0023] See also Figure 1 and Figure 3 In order to facilitate the pressing of the tin bars, the pressing mechanism 5 in this embodiment includes a first motor 501 fixed to the left side of the inner cavity of the box body 6, and the output shaft of the first motor 501 is fixed with a first threaded rod 502. The pressing mechanism 5 also includes a second threaded rod 505 rotatably connected between the left and right sides of the inner cavity of the box body 6 through a bearing seat. The outer surfaces of the first threaded rod 502 and the second threaded rod 505 are provided with a transmission assembly 503. The first threaded rod 502 drives the second threaded rod 505 to rotate through the transmission assembly 503. The first threaded rod 505 02 and the outer surface of the second threaded rod 505 are threadedly connected to two moving blocks 504. The first threaded rod 502 and the second threaded rod 505 rotate simultaneously, driving the two moving blocks 504 to move relative to or opposite to each other at the same time. The lower surface of the moving block 504 is hinged to two hinged rods 506, and the lower surface of the four hinged rods 506 is hinged to a moving plate 507. The pressure plate 7 is fixed to the lower surface of the moving plate 507. The moving block 504 drives the moving plate 507 and the pressure plate 7 to move together through the hinged rod 506 to press the tin bar.

[0024] Among them, the transmission assembly 503 includes a first sprocket fixed to the outer surface of the first threaded rod 502 and a second sprocket fixed to the outer surface of the second threaded rod 505. The outer surfaces of the first sprocket and the second sprocket are connected by a chain, and the first threaded rod 502 drives the second threaded rod 505 to rotate through the transmission assembly 503.

[0025] In addition, sliders are fixed on the front and rear sides of the moving block 504, and sliding grooves are opened on the front and rear sides of the inner cavity of the box body 6. The sliders are slidably connected to the inside of the sliding grooves, thereby increasing the stability of the moving block 504 during movement. Four sliding holes are opened on the lower surface of the moving plate 507, and the moving plate 507 is slidably connected to the outer surface of the support rod 4 through the sliding holes, thereby increasing the stability of the moving plate 507 during movement.

[0026] In the pressing mechanism 5 of this embodiment, the first motor 501 drives the first threaded rod 502 to rotate, and the first threaded rod 502 drives the second threaded rod 505 to rotate together through the transmission assembly 503. The two moving blocks 504 are caused to move relative to each other at the same time through the first threaded rod 502 and the second threaded rod 505. The moving block 504 drives the moving plate 507 and the pressing plate 7 to move together through the hinged rod 506 to press the tin bar, which is convenient for recording the thickness data of the tin bar later.

[0027] See also Figure 4In order to fix the hot plate 3, the fixing mechanism 2 in this embodiment includes a second motor 201 fixed to the upper surface of the inner cavity of the base 1, and the output shaft of the second motor 201 is fixed with a rotating rod 202, and the outer surface of the rotating rod 202 is fixed with a gear 203. The outer surface of the gear 203 is engaged with two racks 204, and the two racks 204 are driven to move relative to or opposite to each other at the same time through the rotation of the gear 203. A vertical plate 205 is fixed to the upper surface of the rack 204, and a clamping rod 206 is fixed on the opposite side of the two vertical plates 205. The fixing mechanism 2 also includes two bottom blocks 207 fixed to the lower surface of the hot plate 3, and the opposite sides of the two bottom blocks 207 are each provided with a clamping hole 208.

[0028] Among them, the clamping rod 206 is slidably connected to the inside of the clamping hole 208, which is used to fix the hot plate 3. The lower surface of the rotating rod 202 is rotatably connected to the lower surface of the inner cavity of the base 1 through the bearing seat, which increases the stability of the rotating rod 202 during rotation. Two bottom holes are provided on the upper surface of the base 1, and the bottom block 207 is slidably connected to the inside of the bottom hole, which is used to limit the hot plate 3.

[0029] In addition, a T-shaped block is fixed to the lower surface of the rack 204. Two T-shaped slots are opened on the lower surface of the inner cavity of the base 1. The T-shaped block is slidably connected to the inside of the T-shaped slots to increase the stability of the rack 204 when moving.

[0030] It should be noted that 12 tin bars with a size of 3.0mm (diameter) * 50mm (length) were placed on a hot plate 3 cooled to ≤40°C, and a total of 12 positions were tested. After the pressing was completed, the tin bars were taken out, and the thickness of each tin bar was measured using a micrometer and the data was recorded. The recorded data were summarized and the range of the tin bar thickness of each hot plate 3 was calculated. If the range was greater than 0.1mm, it was judged to be unqualified and the equipment engineer was notified to follow up and adjust.

[0031] The fixing mechanism 2 in this embodiment inserts the bottom block 207 into the base 1, and the second motor 201 drives the rotating rod 202 and the gear 203 to rotate together, and the front rack 204 moves to the left and the rear rack 204 moves to the right through the gear 203. The rack 204 drives the vertical plate 205 and the clamping rod 206 to move together, so that the clamping rod 206 is clamped into the clamping hole 208, thereby fixing the hot plate 3, making it convenient for the pressing plate 7 to press the tin bar on the hot plate 3, and preventing the hot plate 3 from moving, thereby affecting the pressing effect.

[0032] The working principle of the above embodiment is:

[0033] (1) When the tin bar needs to be pressed, the first motor 501 is started. The first motor 501 drives the first threaded rod 502 to rotate, and the first sprocket is driven to rotate through the first threaded rod 502. The first sprocket drives the second sprocket and the second threaded rod 505 to rotate together through the chain. Since the two sections of the thread of the first threaded rod 502 and the second threaded rod 505 are in opposite directions, the first threaded rod 502 and the second threaded rod 505 rotate, driving the two moving blocks 504 to move relative to each other at the same time, and the moving block 504 will drive the slider to slide inside the slide groove, increasing the stability of the moving block 504 when moving. When the moving block 504 moves, it will drive the hinged rod 506 to rotate. The moving block 504 drives the moving plate 507 and the pressure plate 7 to move together through the hinged rod 506 to press the tin bar, which is convenient for recording the thickness data of the tin bar later.

[0034] (2) After the bottom block 207 is inserted into the interior of the base 1 through the bottom hole, the second motor 201 is started. The second motor 201 drives the rotating rod 202 and the gear 203 to rotate together, and drives the front rack 204 to move to the left through the gear 203, and drives the rear rack 204 to move to the right through the gear 203. The rack 204 will drive the T-shaped block to slide inside the T-shaped groove, increasing the stability of the rack 204 when moving. When the rack 204 moves, it will drive the vertical plate 205 and the clamping rod 206 to move together, so that the clamping rod 206 is clamped into the inside of the clamping hole 208, fixing the hot plate 3, making it convenient for the pressing plate 7 to press the tin bar on the hot plate 3, and preventing the hot plate 3 from moving, thereby affecting the pressing effect.

[0035] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0036] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the flatness of a PCB press, comprising a base (1), characterized in that: A hot plate (3) is placed on the upper surface of the base (1); a fixing mechanism (2) for fixing the hot plate (3) is provided inside the base (1); four support rods (4) are fixed on the upper surface of the base (1); a box (6) is fixed on the upper surface of the four support rods (4); a pressing mechanism (5) is provided inside the box (6); and a pressing plate (7) is provided on the pressing mechanism (5); The pressing mechanism (5) comprises a first motor (501) fixed to the left side of the inner cavity of the box body (6); a first threaded rod (502) is fixed to the output shaft of the first motor (501); the pressing mechanism (5) further comprises a second threaded rod (505) rotatably connected between the left and right sides of the inner cavity of the box body (6) via a bearing seat; a transmission assembly (503) is provided on the outer surfaces of the first threaded rod (502) and the second threaded rod (505); two moving blocks (504) are threadedly connected to the outer surfaces of the first threaded rod (502) and the second threaded rod (505); the lower surfaces of the moving blocks (504) are hinged to two hinged rods (506); and the lower surfaces of the four hinged rods (506) are hinged to moving plates (507).

2. The device for detecting the flatness of a PCB press according to claim 1, characterized in that: The transmission assembly (503) comprises a first sprocket fixed to the outer surface of the first threaded rod (502) and a second sprocket fixed to the outer surface of the second threaded rod (505), and the outer surfaces of the first sprocket and the second sprocket are transmission-connected with chains.

3. The device for detecting the flatness of a PCB press according to claim 1, characterized in that: Slide blocks are fixed on both the front and rear sides of the moving block (504), and slide grooves are opened on both the front and rear sides of the inner cavity of the box body (6). The slide blocks are slidably connected to the inside of the slide grooves, and the pressure plate (7) is fixed to the lower surface of the moving plate (507).

4. The device for detecting the flatness of a PCB press according to claim 1, characterized in that: Four sliding holes are provided on the lower surface of the movable plate (507), and the movable plate (507) is slidably connected to the outer surface of the support rod (4) through the sliding holes.

5. The device for detecting the flatness of a PCB press according to claim 1, characterized in that: The fixing mechanism (2) comprises a second motor (201) fixed to the upper surface of the inner cavity of the base (1); a rotating rod (202) is fixed to the output shaft of the second motor (201); a gear (203) is fixed to the outer surface of the rotating rod (202); two racks (204) are meshed on the outer surface of the gear (203); a vertical plate (205) is fixed to the upper surface of the rack (204); a clamping rod (206) is fixed to the opposite sides of the two vertical plates (205); the fixing mechanism (2) further comprises two bottom blocks (207) fixed to the lower surface of the hot plate (3); and clamping holes (208) are provided on the opposite sides of the two bottom blocks (207).

6. The device for detecting the flatness of a PCB press according to claim 5, characterized in that: The clamping rod (206) is slidably connected to the inside of the clamping hole (208), and the lower surface of the rotating rod (202) is rotatably connected to the lower surface of the inner cavity of the base (1) through a bearing seat.

7. The device for detecting the flatness of a PCB press according to claim 5, characterized in that: The upper surface of the base (1) is provided with two bottom holes, the bottom block (207) is slidably connected to the inside of the bottom holes, the lower surface of the rack (204) is fixed with a T-shaped block, the lower surface of the inner cavity of the base (1) is provided with two T-shaped grooves, and the T-shaped block is slidably connected to the inside of the T-shaped grooves.

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