A manufacturing method of a circuit board alpha type slot hole
By employing a drilling method with a specific angle and clockwise motion on the circuit board, the problems of deformation and burrs during the processing of α-type slots were solved, achieving high-quality slot fabrication.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HESHAN SHIYUN CIRCUIT TECH CO LTD
- Filing Date
- 2022-11-22
- Publication Date
- 2026-05-19
AI Technical Summary
Existing technologies often cause deformation of α-type slots on circuit boards and burrs at intersecting points during the drilling process, making it difficult to meet design requirements.
Using a drilling method with a specific angle and clockwise motion, short and long slots are first machined along different directions based on the pre-drilled hole, and burrs are removed at the intersection to ensure that the round hole is tangent to the axis of the pre-drilled hole.
It effectively prevents deformation of the α-type slot holes on the circuit board and burrs at the intersection, improving product quality and meeting design requirements.
Smart Images
Figure CN116033656B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of circuit board manufacturing technology, and in particular to a method for manufacturing α-type slots in circuit boards. Background Technology
[0002] Currently, the fabrication of holes on printed circuit boards (PCBs) depends on the functional requirements of the PCB, involving the creation of slots, blind vias, or through-holes. Slots can be categorized by whether they are metallized or not, and by shape into elongated slots, short slots, square slots, and irregularly shaped slots. The α-type slot is designed with an intersection of a short slot, an elongated slot, and a round hole. The common processing method is to drill the short slot first, then the elongated slot, and finally the round hole. However, deformation is prone to occur during drilling, and burrs are easily generated at the intersection points, failing to meet design requirements.
[0003] Application content
[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a method for manufacturing α-type slot holes on a circuit board, which can prevent deformation and avoid burrs at intersections, meeting design requirements and improving product quality.
[0005] According to an embodiment of this application, a method for manufacturing an α-type slot in a circuit board includes a short slot, a long slot, and a circular hole. The length of the long slot is greater than the length of the short slot. The left end of the short slot and the upper end of the long slot are coaxially aligned. The rightmost edge of the circular hole is tangent to the axis. The method includes:
[0006] Pre-drilled holes are provided on the circuit board;
[0007] The short slot is machined starting from the pre-drilled hole along a first predetermined direction, wherein the first predetermined direction is a direction inclined 2 degrees to the right and upward along the axis of the pre-drilled hole.
[0008] The long slot is machined starting from the pre-drilled hole along a second predetermined direction, which is a direction inclined 8 degrees to the right of the axis of the pre-drilled hole.
[0009] On the right side of the pre-drilled hole, the circular hole is machined so that the rightmost edge of the circular hole is tangent to the axis of the pre-drilled hole;
[0010] The pre-drilled hole, the short slot, and the round hole form a first intersection, and a first repair groove is processed at the first intersection to remove burrs from the first intersection; the long slot and the round hole form a second intersection, and a second repair groove is processed at the second intersection to remove burrs from the second intersection.
[0011] The method for manufacturing an α-type slot in a circuit board according to the embodiments of this application has at least the following beneficial effects: The method for manufacturing an α-type slot in a circuit board according to the embodiments of this application first performs pre-drilling; then, a short slot is machined from the axis of the pre-drilled hole at a 2-degree upward and rightward inclination; next, a long slot is machined from the axis of the pre-drilled hole at an 8-degree downward and rightward inclination; a round hole is machined on the right side of the pre-drilled hole, with the rightmost edge of the round hole tangent to the axis of the pre-drilled hole; then, a first repair groove and a second repair groove are machined at the first intersection and the second intersection, respectively, thereby removing burrs at the first intersection and the second intersection. By using the above method to manufacture the α-type slot in the circuit board, deformation can be prevented, and burrs at the intersections can be avoided, meeting design requirements and improving product quality.
[0012] According to the embodiment of this application, a method for manufacturing an α-type slot hole in a circuit board is described, wherein the pre-drilled hole is drilled using a first drill bit with a diameter of 0.9 mm.
[0013] According to an embodiment of this application, a method for manufacturing an α-type slot in a circuit board is described, wherein the length of the short slot is 1.25 mm.
[0014] According to the embodiment of this application, a method for manufacturing an α-type slot in a circuit board is described, wherein the short slot is drilled using a 0.7mm second drill bit, and the second drill bit moves clockwise along the edge of the short slot.
[0015] According to an embodiment of this application, a method for manufacturing an α-type slot in a circuit board is provided, wherein the length of the long slot is 1.95 mm.
[0016] According to an embodiment of this application, a method for manufacturing an α-type slot in a circuit board is described, wherein the long slot is drilled using a 0.6mm third drill bit, and the third drill bit moves clockwise along the edge of the long slot.
[0017] According to the embodiment of this application, a method for manufacturing an α-type slot in a circuit board is provided, wherein the lengths of the first repair slot and the second repair slot are both 1.3 mm.
[0018] According to the embodiment of this application, a method for manufacturing an α-type slot hole on a circuit board is provided, wherein the first repair slot and the second repair slot are drilled using a 0.65mm fourth drill bit, and the fourth drill bit moves clockwise along the edges of the first repair slot and the second repair slot, respectively.
[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0020] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0021] Figure 1 This is a schematic diagram of the structure of the α-type slot hole on the circuit board according to an embodiment of this application;
[0022] Figure 2 This is a flowchart illustrating a method for manufacturing an α-type slot hole in a circuit board according to an embodiment of this application.
[0023] Figure 3 This is a schematic diagram illustrating a method for manufacturing an α-type slot hole in a circuit board according to an embodiment of this application.
[0024] Explanation of reference numerals in the attached figures:
[0025] Short slot 101; long slot 102; round hole 103. Detailed Implementation
[0026] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.
[0027] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0028] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.
[0029] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.
[0030] Currently, the fabrication of holes on printed circuit boards (PCBs) depends on the functional requirements of the PCB, and involves creating slots, blind vias, or through-holes. Slots can be classified as metallized or non-metallized according to whether they are metallized, and as long slots (102), short slots (101), square slots, and irregularly shaped slots, etc., according to their shape.
[0031] Reference Figure 1 The α-type slot includes a short slot 101, a long slot 102, and a circular hole 103. Both the long slot 102 and the short slot 101 include a first part, a second part, and a third part. The second part connects the first and third parts. The first part is an arcuate surface, the second part is a parallel surface, and the third part is an arcuate surface symmetrical to the first part about the second part. The length of the first long slot 102 is greater than the length of the short slot 101. The first parts of the short slot 101 and the first parts of the long slot 102 are coaxially aligned. The rightmost edge of the circular hole 103 is tangent to the axis.
[0032] However, the common processing method is to first drill short slots 101, then long slots 102, and finally round holes 103, which makes it easy for burrs to appear at the intersection, failing to meet the design requirements.
[0033] Therefore, refer to Figures 1 to 3 This application provides a method for manufacturing an α-type slot in a circuit board. The α-type slot includes a short slot 101, a long slot 102, and a circular hole 103. Both the long slot 102 and the short slot 101 include a first part, a second part, and a third part. The second part connects the first and third parts. The first part is an arcuate surface, the second part is a parallel surface, and the third part is an arcuate surface symmetrical to the first part about the second part. The length of the first long slot 102 is greater than the length of the short slot 101. The first part of the short slot 101 and the first part of the long slot 102 are coaxially aligned. The rightmost edge of the circular hole 103 is tangent to the axis.
[0034] The method includes the following steps:
[0035] S100. Pre-drilled holes are set on the circuit board;
[0036] S200. Starting from the pre-drilled hole, the short slot 101 is machined along the first set direction, which is a direction that is inclined 2 degrees to the right and upward along the axis of the pre-drilled hole.
[0037] S300. Starting from the pre-drilled hole, process the long slot hole 102 along the second set direction. The second set direction is the direction that is inclined 8 degrees to the right of the axis of the pre-drilled hole.
[0038] S400. On the right side of the pre-drilled hole, the circular hole 103 is machined so that the rightmost edge of the circular hole 103 is tangent to the axis of the pre-drilled hole.
[0039] S500, pre-drilled hole, short slot hole 101 and round hole 103 form a first intersection, and a first repair groove is processed at the first intersection to remove burrs at the first intersection; long slot hole 102 and round hole 103 form a second intersection, and a second repair groove is processed at the second intersection to remove burrs at the second intersection.
[0040] The method for manufacturing an α-type slot in a circuit board according to an embodiment of this application involves first pre-drilling a hole; then machining a short slot 101 at a 2-degree upward and rightward inclination from the axis of the pre-drilled hole; next, machining a long slot 102 at an 8-degree downward and rightward inclination from the axis of the pre-drilled hole; machining a circular hole 103 on the right side of the pre-drilled hole, with the rightmost edge of the circular hole 103 tangent to the axis of the pre-drilled hole; and then machining a first repair groove and a second repair groove at the first and second intersections, respectively, to remove burrs at the first and second intersections. By using the above method to manufacture the α-type slot in the circuit board, deformation can be prevented, and burrs at the intersections can be avoided, meeting design requirements and improving product quality.
[0041] In S100, the pre-drilled hole is drilled using a 0.9mm first drill bit. Specifically, using a 0.9mm first drill bit, a circular hole is drilled within a preset range on the circuit board as a pre-drilled hole to fix the center of the α-type slot.
[0042] In S200, the short slot 101 is drilled using a 0.7mm second drill bit, creating a slot with a length of 1.25mm. Specifically, using a 0.7mm second drill bit, the axis of the second drill bit is aligned with the axis of the pre-drilled hole, and starting from the axis of the pre-drilled hole, it moves 1.25mm from left to right along a direction inclined 2 degrees to the right of the axis of the pre-drilled hole, thereby forming the short slot 101. The second drill bit moves clockwise along the edge of the short slot 101. Of course, the second drill bit can also move counterclockwise along the edge of the short slot 101; this application does not limit this movement.
[0043] In S300, the elongated slot 102 is drilled using a 0.6mm third drill bit, resulting in a slot 1.95mm in length. Specifically, a 0.6mm third drill bit is used, with its axis coinciding with the axis of the pre-drilled hole. Starting from the axis of the pre-drilled hole, the drill bit moves downwards and downwards by 1.95mm in a direction tilted 8 degrees to the right of the axis, thus forming the elongated slot 102. The third drill bit moves clockwise along the edge of the short slot 101. It should be noted that the third drill bit can also move counterclockwise along the edge of the short slot 101.
[0044] In S500, both the first and second repair slots are drilled with a 0.65mm fourth drill bit to create 1.3mm long slots to remove burrs at the first and second intersection points. Specifically, the first and second repair slots start from the upper left and lower left of the pre-drilled hole, respectively, and move clockwise from left to right along their edges to remove burrs at the first and second intersection points, preventing burr abnormalities. It is conceivable that the first and second repair slots are positioned at a 20-degree angle to the upper left of the pre-drilled hole's axis, with the upper edge of the first repair slot tangent to the first edge of the pre-drilled hole at the first intersection point, and the upper edge of the second repair slot tangent to the side of the pre-drilled hole furthest from the first edge. This ensures smooth burr removal at the first and second intersection points without affecting the α-type slot, meeting design requirements and improving product quality. Of course, those skilled in the art can make reasonable choices regarding the setting of the first and second repair slots according to the actual situation, as long as it ensures that the burrs at the first intersection and the second intersection can be removed. This application does not impose any restrictions on this.
[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0046] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.
Claims
1. A method for manufacturing an α-type slot hole on a circuit board, characterized in that, The α-type slot includes a short slot, a long slot, and a circular hole. The length of the long slot is greater than the length of the short slot. The left end of the short slot and the upper end of the long slot are coaxially aligned. The rightmost edge of the circular hole is tangent to the axis. The method includes: Using the first drill bit, a circular hole is drilled within a preset range on the circuit board as a pre-drilled hole; Using a second drill bit, the axis of the second drill bit coincides with the axis of the pre-drilled hole. The short slot is machined starting from the axis of the pre-drilled hole along a first set direction, which is a direction that is inclined 2 degrees to the right and upward along the axis of the pre-drilled hole. Using a third drill bit, the axis of which coincides with the axis of the pre-drilled hole, the long slot is machined starting from the axis of the pre-drilled hole along a second set direction, the second set direction being a direction inclined 8 degrees to the right below the axis of the pre-drilled hole. On the right side of the pre-drilled hole, the circular hole is machined so that the rightmost edge of the circular hole is tangent to the axis of the pre-drilled hole; The pre-drilled hole, the short slot, and the round hole form a first intersection, where a first repair groove is processed to remove burrs. The long slot and the round hole form a second intersection, where a second repair groove is processed to remove burrs. The first and second repair grooves are arranged at a 20-degree angle to the left and upward along the axis of the pre-drilled hole, with the upper edge of the first repair groove tangent to the first edge of the pre-drilled hole at the first intersection, and the upper edge of the second repair groove tangent to the side of the pre-drilled hole away from the first edge.
2. The method for manufacturing an α-type slot in a circuit board according to claim 1, characterized in that, The pre-drilled hole was drilled using a 0.9mm first drill bit.
3. The method for manufacturing an α-type slot in a circuit board according to claim 1, characterized in that, The length of the short slot is 1.25 mm.
4. The method for manufacturing an α-type slot in a circuit board according to claim 3, characterized in that, The short slot is drilled using a 0.7mm second drill bit, and the second drill bit moves clockwise along the edge of the short slot.
5. The method for manufacturing an α-type slot in a circuit board according to claim 1, characterized in that, The length of the long slot is 1.95 mm.
6. The method for manufacturing an α-type slot hole on a circuit board according to claim 5, characterized in that, The long slot is drilled using a 0.6mm third drill bit, and the third drill bit moves clockwise along the edge of the long slot.
7. The method for manufacturing an α-type slot in a circuit board according to claim 1, characterized in that, The length of both the first repair groove and the second repair groove is 1.3 mm.
8. The method for manufacturing an α-type slot in a circuit board according to claim 7, characterized in that, The first repair groove and the second repair groove are drilled using a 0.65mm fourth drill bit, and the fourth drill bit moves clockwise along the edges of the first repair groove and the second repair groove, respectively.