Ceramic substrate slicing tool

Abstract

A fixed shaft and a rotating shaft are both fixed to a tool base, the fixed shaft is provided with a boss, the rotating shaft is provided with a groove matched with the boss, and the fixed shaft and the rotating shaft are embedded together through the boss and the groove; and when the fixed shaft groove and the rotating shaft groove are overlapped and aligned, a herringbone notch is formed. A cylindrical contact device is additionally arranged at the top of an air rod of the force application air cylinder and is in soft contact with the rotating shaft; one end of the auxiliary spring is fixed on the rotating shaft, and the other end of the auxiliary spring is fixed on the spring base which is fixed on the base. According to the invention, the phenomenon of more and less porcelain of a product after fragmentation can be effectively reduced, the size integrity of the substrate is ensured, and the front and back surface-mounted devices are not easy to damage in the fragmentation process, and the circuit performance is not influenced.

Description

Technical Field

[0001] The invention relates to the field of ceramic substrates, and in particular to a ceramic substrate slicing device. Background Art

[0002] CA series integrated circuits are widely used in front-end thermal control processing systems for new energy vehicles and traditional vehicles. With the continuous expansion of the new energy vehicle market, the market demand for automotive commercial core chip control circuits is huge and showing a blowout growth trend.

[0003] In the current technology, the slicing process of thick film circuits has the problems of low efficiency, excessive slicing and lack of slicing, which affects the appearance and performance of the product.

[0004] During the production process, this series of products has a 2mm thick ceramic substrate, a large size of the entire board (connected piece size: 112.2×96.8mm; single piece product size: 14.15×12.4×2mm), a large number of connections (42 connections), and a scratch line depth of 1mm. It is not easy to separate the pieces during the production process, and the phenomenon of more ceramic and less ceramic after separation is more serious. In addition, the components mounted on the front and back sides are easily damaged during the separation process, thus affecting the circuit performance. Summary of the invention

[0005] The present invention provides a ceramic substrate slicing tool, which reduces the phenomenon of excess or insufficient ceramic in products after slicing, ensures the dimensional integrity of the substrate, and is not likely to cause damage to components mounted on the front and back surfaces during the slicing process, thereby not affecting circuit performance.

[0006] The technical solution of the present invention is a ceramic substrate slicing tool, characterized in that it includes a fixed shaft and a rotating shaft, both of which are fixed on the tooling base, the fixed shaft is provided with a boss, the rotating shaft is provided with a groove adapted to the boss, the fixed shaft and the rotating shaft are engaged together using the boss and the groove; a fixed shaft groove is provided on the fixed shaft, and a rotating shaft groove is provided on the rotating shaft; when the fixed shaft groove and the rotating shaft groove are engaged, a herringbone notch is formed.

[0007] Furthermore, a force-applying cylinder, a power-assisting spring and an anti-foolproofing photoelectric switch are fixed on the tooling base; a cylindrical contact device is installed on the top of the gas rod of the force-applying cylinder to provide soft contact between the device and the rotating shaft; one end of the power-assisting spring is fixed on the rotating shaft and the other end is fixed on the spring base; the anti-foolproofing photoelectric switch is fixed on the rotating shaft via an anti-foolproofing photoelectric switch fixing seat.

[0008] Furthermore, the fixed axis groove and the rotating axis groove have the same size and are mirror images in position and direction.

[0009] Furthermore, the size of the fixed shaft groove is larger than the size of the rotating shaft groove, and the position directions are mirror images.

[0010] Furthermore, the direction of the rebound auxiliary force of the power-boosting spring forms an angle of 45° with the direction of the pushing force of the gas rod.

[0011] The present invention has the following beneficial effects:

[0012] 1. The present invention utilizes corresponding grooves on the fixed shaft and the rotating shaft to ensure that the device does not touch the slicing tooling during the slicing process;

[0013] 2. The front end of the gas rod of the present invention is in soft contact with the rotating shaft. The advantage of soft contact is that no matter how the position of the rotating shaft changes, the force applied by the cylinder through the gas rod remains stable, thereby ensuring the integrity of the substrate during the slicing process.

[0014] 3. The assist spring of the present invention uses a spring with a size of about 5N to assist the return of the rotating shaft. Its position direction forms an angle of 45° with the pushing direction of the gas rod, thereby ensuring the rebound stability of the rotating shaft.

[0015] 4. The present invention is committed to solving the slicing process of 2mm thick ceramic substrates through technological innovation and process improvement, so that the product process technology is optimized and improved, large-scale mass production is achieved, and product performance and appearance requirements are met. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a full-page product diagram;

[0017] Figure 2 This is a schematic diagram of strip products

[0018] Figure 3 This is a schematic diagram of the front side of the pad;

[0019] Figure 4 This is a schematic diagram of the reverse side of the pad;

[0020] Figure 5 It is the overall schematic diagram of the slitting tooling;

[0021] Figure 6 It is a schematic diagram of striping operation;

[0022] Figure 7 It is the overall schematic diagram of the piece tooling;

[0023] Figure 8 It is a schematic diagram of the slice rotation combination;

[0024] Fig. 9 It is a schematic diagram of the operation of the slicing tooling;

[0025] Fig.10 is a schematic diagram of a fixed axis;

[0026] Fig.11 Schematic diagram of the rotating shaft;

[0027] Fig.12 is a schematic diagram of the groove of the rotating shaft;

[0028] Fig.13 It is a schematic diagram of the fixed shaft groove;

[0029] Fig.14 It is a schematic diagram of the force direction of the assist spring;

[0030] Explanation of the accompanying figures: 1- tooling base, 2- force cylinder, 3- rotating shaft, 4- fixed shaft, 5- rotating shaft groove, 6- fixed shaft groove, 7- assist spring, 8- spring base, 9- foolproof photoelectric switch, 10- foolproof photoelectric switch fixing seat, 11- cylindrical contact device. DETAILED DESCRIPTION

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, there are surface mount devices on the front and back of the product, and the thickness of some devices is greater than the thickness of the substrate, so the devices on the raised parts are easily damaged during the slicing process. In addition, due to the physical properties of ceramic materials, there will be raised or sunken surface phenomena on the edges of the product substrate after slicing, that is, the phenomenon of more ceramic and less ceramic. The occurrence of this phenomenon will affect the adaptability and safety of the product itself, and cause certain electrical performance risks to the product.

[0032] The present invention mainly utilizes the bending principle to design the tooling, and the cylinder is used as the power to apply force, so as to assist the operation during the slicing process. The primary design goal is to protect the integrity of the product substrate and devices, so corresponding grooves are made according to the distribution of product devices in the early stage of design to ensure that the devices will not touch the slicing tooling during the slicing process; secondly, the design is aimed at the phenomenon of more porcelain and less porcelain on the edge of the product. After the force analysis model demonstration, it is found that the phenomenon of more porcelain and less porcelain caused by uneven force is more obvious, so the force on the product during slicing on the tooling is as uniform as possible.

[0033] The present invention mainly consists of three parts: a tooling base 1, a folding strip rotating assembly, and a segment rotating assembly; the folding strip rotating assembly and the segment rotating assembly are fixed on the base.

[0034] The tooling base 1 is made of square steel, mainly to improve the stability during the slitting process and reduce the shaking of the product during the slitting process.

[0035] like Figure 5As shown, the folding strip rotating assembly is made of polyester fiber material, which can provide a certain external force folding and fixing of the product, protect the integrity of the substrate and avoid damage to the device. It consists of two parts, namely, the fixed shaft 4 and the fixed shaft groove 6, the rotating shaft 3 and the rotating shaft groove 5. The fixed shaft is provided with a boss, and the rotating shaft is provided with a groove adapted to the boss. The fixed shaft and the rotating shaft are rotated together by fitting the boss and the groove. The fixed shaft groove 6 and the rotating shaft groove 5 are of the same size, and the position direction is a mirror image. Fig.10 , Fig.11 , Fig.12 , Fig.13 When the fixed shaft groove 5 and the rotating shaft groove 6 are aligned, there is a herringbone notch.

[0036] like Figure 7 , Figure 8 As shown, the split-rotation assembly consists of five parts, namely, a force cylinder 2, a booster spring 7, a spring base 8, an anti-fool photoelectric switch 9, a fixed shaft 4 and a fixed shaft groove 5, a rotating shaft 3 and a rotating shaft groove 6, and is made of polyester fiber. In addition to the main body, the auxiliary device includes an auxiliary air source, and the overall combination constitutes a complete split tooling.

[0037] The foolproof photoelectric switch 9 is fixed on the rotating shaft 3 through the foolproof photoelectric switch fixing seat 10 .

[0038] One end of the booster spring 7 is fixed on the rotating shaft 3 , and the other end is fixed on the spring base 8 , and the spring base 8 is fixed on the tooling base 1 .

[0039] The size of the fixed shaft groove 5 is larger than that of the rotating shaft groove 6, and the position directions are mirror images.

[0040] The auxiliary gas source adopts 2MPA gas source as the gas source, and the production line uses a unified gas source. The required time and force for product bending can be met during the slicing process, and there is no need to provide an additional dedicated gas source, which is convenient for production line layout and daily inspection and maintenance.

[0041] Air source gas rod device: The stroke length of the gas rod is 14mm, which can meet the movement distance of the rotating shaft, so that the rotating shaft can have a larger rotation range and achieve a better slicing effect; a cylindrical contact device 11 with a thickness of 12mm and a diameter of 18mm is installed on the top of the gas rod to ensure stable contact between the rotating shaft 3 and the gas rod, which is convenient for stable force application. The front end of the gas rod is in soft contact with the rotating shaft because the movement of the gas rod is linear and the movement of the rotating shaft is curved. The advantage of soft contact is that no matter how the position of the rotating shaft changes, the force applied by the cylinder through the gas rod remains stable, ensuring the integrity of the substrate during the slicing process.

[0042] Assist spring 7: A spring with a magnitude of about 5N is used to assist the return of the rotating shaft 3. The direction of its rebound assist force forms an angle of 45° with the direction of the gas rod pushing force, such as Fig.14 As shown, the rebound stability of the rotating shaft is guaranteed.

[0043] Foolproof photoelectric switch 9: Foolproof photoelectric switch 9 uses limit alarm, and limits the position according to the size of the single piece of slicing, combined with infrared anti-fool and cylinder linkage. When the slitting product is not inserted into the groove properly, the foolproof photoelectric switch is activated, the cylinder control switch is stepped on, and the cylinder does not move; when the slitting product is inserted into the groove properly, the foolproof photoelectric switch is not activated, and the cylinder control switch is stepped on at this time, and the cylinder moves normally to perform the slicing operation.

[0044] Due to the different length and width dimensions of the products, in order to ensure that the edges of the sliced ​​products are neat, a separate striping and slicing process design is adopted. That is, the entire product is first striped in the designed direction (with the blank substrate end as the direction for inserting into the groove), and the striped product is divided into small pieces with the pad end as the direction for inserting into the groove, to obtain the final product.

[0045] In the process of striping and slicing, the most important thing is to reduce the phenomenon of excess or insufficient ceramics in the products after slicing and ensure the dimensional integrity of the substrate.

[0046] like Figure 6 As shown, the stripping process: take the direction of the pad as the bottom insertion direction, take the side of the blank substrate as the top, first remove the process edges of the bottom, left and right sides, retain the top process edge (i.e. the blank substrate part), insert the blank substrate into the groove of the fixed axis and the rotating axis, align the substrate scratch line with the bending part of the tooling, use the bending principle, manually push the rotating axis of the tooling, and you can get a strip product. It should be noted that when inserting the groove with the blank substrate end as the direction, it cannot be inserted from top to bottom. In order to protect the surface mount devices of the product, it should be inserted horizontally from left to right or right to left, and the product should be kept stable after rotation and bending to avoid large-scale shaking. In this way, the phenomenon of missing porcelain at both ends of a strip of product will be greatly reduced.

[0047] During the slitting process, since the turning point of the tooling bend directly acts on the blank substrate, the force dissipation point of the applied force is at the blank substrate during the slitting rotation process, and the remaining part is directly decomposed during the force transmission process due to the existence of the scratch line, and will not damage the substrate and the device. In this way, the phenomenon of less porcelain and edge collapse during slitting will be concentrated on the blank substrate, which is conducive to protecting the integrity of the product and the integrity of the device.

[0048] like Fig. 9As shown in the figure, the slicing process: insert the slicing product into the grooves of the fixed shaft and the rotating shaft with the direction of the pad as the bottom insertion direction, ensure that one end of the product is against the tooling limit, align the substrate scratch line with the tooling bend, make sure there is no alarm on the anti-fool photoelectric switch, step on the cylinder control switch, and the force cylinder pushes the rotating shaft to rotate and bend downward to obtain the final product. When the rotating shaft moves downward, the assist spring will give it an upward thrust to assist the rotating shaft to rebound and return to the same horizontal position as the fixed shaft.

[0049] The angle of rotation of the rotating shaft when it is bent is crucial. If the rotation angle is small, the kinetic energy generated when the product splits cannot be dissipated in time, resulting in more obvious porcelain chipping. If the rotation angle is too large, the kinetic energy will be distributed at the edge of the substrate, causing serious porcelain deficiency in the product. Therefore, the rotation angle of the rotating shaft is set within the range of 5°±1° according to the product thickness.

Claims

1. A ceramic substrate slicing tool, characterized in that: The fixed shaft (4) and the rotating shaft (3) are both fixed on a tooling base (1); the fixed shaft (4) is provided with a boss, the rotating shaft (3) is provided with a groove adapted to the boss, the fixed shaft (4) and the rotating shaft (3) are engaged with each other by means of the boss and the groove; a fixed shaft groove (6) is provided on the fixed shaft, and a rotating shaft groove (5) is provided on the rotating shaft; when the fixed shaft groove (6) and the rotating shaft groove (5) are engaged with each other, a herringbone notch is formed.

2. The ceramic substrate slicing tool as claimed in claim 1, characterized in that: A force-applying cylinder (2), a power-assisting spring (7) and an anti-fool-proofing photoelectric switch (9) are also fixed on the tooling base (1); a cylindrical contact device (11) is installed on the top of the gas rod of the force-applying cylinder (2) to provide soft contact between the cylindrical contact device and the rotating shaft (3); one end of the power-assisting spring (7) is fixed on the rotating shaft (3), and the other end is fixed on the spring base (8); and the anti-fool-proofing photoelectric switch (9) is fixed on the rotating shaft (3) via an anti-fool-proofing photoelectric switch fixing seat (10).

3. The ceramic substrate slicing tool as claimed in claim 1, characterized in that: The fixed shaft groove (6) and the rotating shaft groove (5) have the same size and are mirror images in position and direction.

4. The ceramic substrate slicing tool as claimed in claim 2, characterized in that: The size of the fixed shaft groove (6) is larger than that of the rotating shaft groove (5), and the position direction is a mirror image.

5. The ceramic substrate slicing tool as claimed in claim 4, characterized in that: The direction of the rebound auxiliary force of the booster spring (7) forms an angle of 45° with the direction of the force applied by the gas rod.

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