Burr-free special-shaped hole machining method

Abstract

The invention discloses a burr-free special-shaped hole processing method, which comprises the following steps of: obtaining a PCB (Printed Circuit Board), and forming a special-shaped hole in the PCB; grinding and puncturing holes are formed in the intersection positions of the special-shaped holes, and the projection area formed by the hole diameters of the grinding and puncturing holes completely covers burrs formed in the intersection positions so that the burrs at the intersection positions can be removed; the burr grinding holes are additionally arranged to grind burrs on the hole wall of the special-shaped hole, so that the technical effect of no burrs is achieved, and subsequent manual grinding is avoided.

Description

Technical Field

[0001] The invention relates to the field of PCB production, and in particular to a method for processing burr-free special-shaped holes. Background Art

[0002] PCB (Printed Circuit Board) is a very important component in the electronics industry. It is used to support and connect electronic components to achieve electrical interconnection. PCB consists of an insulating base, connecting wires and pads for assembling and welding electronic components. It has the dual functions of a conductive line and an insulating base. It can replace complex wiring to achieve electrical connection between components in the circuit.

[0003] In the process of PCB board production, it is essential to carry out processing in advance for the existing mainstream PCB boards. For special-shaped holes, burrs are easily generated at the intersection when opening the holes. For the removal of burrs, it is often necessary to manually polish for a long time, which leads to an increase in the cost of PCB boards and a longer delivery time. In addition, in the process of manual removal, it is extremely easy to cause problems such as PCB board breakage, bending, and scratches, and the experience requirements for operators are also high. Therefore, a more reasonable hole opening method is urgently needed to solve the deficiencies in the existing technology. Summary of the invention

[0004] The present invention provides a solution to the technical problem that burrs are easily generated in the processing of special-shaped holes in PCB boards in the prior art, resulting in the need for manual grinding and increased production time.

[0005] To achieve the above object, the present invention provides a burr-free special-shaped hole processing method, comprising the following steps: Obtain a PCB board, and form a special-shaped hole on the PCB board; A grinding hole is opened at the intersection of the special-shaped holes, and the projection area formed by the aperture of the grinding hole completely covers the burrs formed at the intersection, so that the burrs at the intersection are removed.

[0006] As an improved solution of the present invention, the steps of preparing the irregularly shaped hole include: Two intersecting cutter lines are preset, and a first size cutter cuts along the cutter lines in sequence to obtain the special-shaped hole.

[0007] As an improved solution of the present invention, the preset knife line further includes: Acquire a standard board surface, and scan the board surface of the PCB board to obtain a workpiece board surface; Comparing the workpiece plate surface with the standard plate surface to determine the starting point of the knife line; The cut line is generated based on the cut line starting point.

[0008] As an improved solution of the present invention, the step of determining the starting point of the knife line includes: Generate standard coordinates of the expected standard cutter line starting point according to the standard plate surface; Generating a first coordinate system according to a first side edge of the workpiece plate surface, and generating a second coordinate system according to a second side edge thereof; The standard plate surface and the workpiece plate surface are overlapped in equal proportion, so as to obtain knife line coordinates from the first coordinate system and the second coordinate system, and the knife line coordinates have the same vertical position as the standard coordinates; The knife line coordinates are used as the knife line starting point.

[0009] As an improved solution of the present invention, the cutting direction of one of the knife lines is from the starting point of the knife line to the first side edge, and the cutting direction of another knife line is from the starting point of the knife line to the second side edge.

[0010] As an improved solution of the present invention, the intersection angle of the two knife lines is 90°.

[0011] As an improved solution of the present invention, the step of forming the grinding hole includes: Acquire the inner angle position formed by the special-shaped hole, and determine the burr position according to the inner angle position as the intersection; forming a burr removal area so that the burr removal area completely covers the area formed by the burrs; The burr removal area is drilled by a second size tool to form the burr hole.

[0012] As an improved solution of the present invention, the tool diameter of the first-sized tool is greater than the tool diameter of the second-sized tool.

[0013] As an improved solution of the present invention, the tool diameter of the first-sized tool is 0.05 mm.

[0014] As an improved solution of the present invention, the diameter of the second-sized tool is 0.1-0.5 mm.

[0015] The beneficial effect of the present invention is that compared with the prior art, the present invention provides a burr-free special-shaped hole processing method. In the process of processing special-shaped holes on a PCB board, burrs on the wall of the special-shaped hole are ground by adding grinding holes to achieve a burr-free technical effect, thereby eliminating subsequent manual grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is one of the processing steps of the present invention; Figure 2 This is the second schematic diagram of the processing steps of the present invention; Figure 3 This is the third schematic diagram of the processing steps of the present invention; Figure 4 It is a process flow chart of the present invention.

[0018] The main component symbols are described as follows: 1. Special-shaped holes; 2. Deburring area; 3. PCB board. DETAILED DESCRIPTION

[0019] In order to more clearly illustrate the present invention, the present invention is further described below in conjunction with the accompanying drawings.

[0020] In the following description, the example details are given to provide a deeper understanding of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. It should be understood that the specific embodiments are only used to explain the present invention and are not used to limit the present invention.

[0021] It should be understood that when the terms "include" and / or "comprises" are used in this specification, they indicate the existence of the stated features, integers, steps, operations, elements or components, but do not exclude the existence or addition of one or more other features, integers, steps, operations, elements, components or combinations thereof.

[0022] In the process of PCB board production, it is essential to carry out processing in advance. For special-shaped holes, the determination of special-shaped holes on PCB boards needs to be sufficiently accurate. At the same time, burrs are easily generated at the intersection when opening holes. For the removal of burrs, it is often necessary to manually polish for a long time, which leads to an increase in the cost of PCB boards and a longer delivery time. In addition, in the process of manual removal, it is extremely easy to cause problems such as PCB board breakage, bending, scratching, etc., and the experience requirements for operators are also high. In view of the technical problems that the positioning of the special-shaped holes in the prior art is not accurate enough and burrs are easily generated during the processing, resulting in a long working period, the present invention provides a solution. This application provides a method for processing special-shaped holes without burrs. Please refer to the attached Figure 1 To Attachment Figure 4 , including the following steps: Obtain a PCB board 3, and form a special-shaped hole 1 on the PCB board 3; A grinding hole is opened at the intersection of the special-shaped holes 1, and the projection area formed by the aperture of the grinding hole completely covers the burrs formed at the intersection, so that the burrs at the intersection are removed.

[0023] It can be seen that in the process of processing the special-shaped hole 1 on the PCB board 3, the burrs on the hole wall of the special-shaped hole 1 are ground by adding grinding holes to achieve a burr-free technical effect, eliminating the subsequent manual grinding process, greatly shortening the construction period, and improving the production speed and enterprise competitiveness.

[0024] The following is an explanation of the production process of the overall special-shaped hole 1: For the drilling stage of the special-shaped hole 1, the preparation steps of the special-shaped hole 1 include: Two intersecting cutter lines are preset, and the first size cutter cuts along the cutter lines in sequence to obtain the special-shaped hole 1; For the preparation of the special-shaped hole 1, a milling cutter is installed on a CNC drilling machine, and the cutter is controlled to rotate and cut along the cutter line to form the special-shaped hole 1. Due to the material of the raw material of the PCB board 3, burrs are easily formed at the intersection of the cutter lines. In this embodiment, a suitable first-size cutter is selected to cut the cutter lines in sequence to obtain the expected special-shaped hole 1. In the production process of the special-shaped hole 1, it is particularly important to determine the starting point of the knife line. The specific steps for generating the knife line also include: Obtain a standard board surface, scan the board surface of the PCB board 3 to obtain a workpiece board surface; compare the workpiece board surface with the standard board surface to determine a knife line starting point; generate a knife line based on the knife line starting point; In actual production, firstly, the corresponding drawing is produced or loaded in the host computer as the standard plate surface. After comparing the scanned workpiece plate surface with the standard plate surface, the standard opening position in the standard plate surface is marked on the workpiece plate surface, so as to quickly determine the position of the starting point of the knife line. In another specific solution, the step of determining the starting point of the knife line includes: Generate standard coordinates of the expected standard knife line starting point according to the standard plate surface; generate a first coordinate system according to the first side of the workpiece plate surface, and generate a second coordinate system according to its second side; make the standard plate surface overlap with the workpiece plate surface in equal proportion, so as to obtain knife line coordinates from the first coordinate system and the second coordinate system, and the knife line coordinates have the same vertical position as the standard coordinates; use the knife line coordinates as the knife line starting point; In a specific embodiment, after the standard coordinates are collected by the host computer, it plays a role of auxiliary positioning. When the standard plate surface and the workpiece plate surface overlap in equal proportions, since the knife line coordinates and the standard coordinates are in the same vertical position, the knife line coordinates are quickly calculated in conjunction with the first coordinate system and the second coordinate system, thereby facilitating rapid processing by technical personnel.

[0025] In a specific solution, the cutting direction of one cutting line is from the starting point of the cutting line to the first side, and the cutting direction of the other cutting line is from the starting point of the cutting line to the second side; the intersection angle of the two cutting lines is 90° to form an "L"-shaped hole.

[0026] With regard to the burr hole formation scheme, in this embodiment, the burr hole formation steps include: obtaining the inner angle position formed by the special-shaped hole 1, and determining the burr position based on the inner angle position as the intersection; forming a burr removal area 2 so that the burr removal area 2 completely covers the area formed by the burr; and drilling the burr removal area 2 with a second size tool to form a burr hole.

[0027] In actual production, due to the plate material of the PCB board 3, burrs are easily formed at the inner corners during the processing of the special-shaped hole 1. The burr removal area 2 is determined based on the area where the burrs are mainly formed, and the second-size tool is controlled to perform rotational grinding to ensure that the burr removal area 2 can completely cover the burrs to eliminate the burrs to the greatest extent; in a further solution and understandable, the tool diameter size of the first-size tool is larger than the tool diameter size of the second-size tool to ensure that the second-size tool will not affect the special-shaped hole 1 during the grinding process; in a specific embodiment, the tool diameter size of the first-size tool is 0.05mm, and the tool diameter size of the second-size tool is 0.1-0.5mm.

[0028] The advantages of the present invention are: In the process of processing special-shaped holes on PCB boards, grinding holes are added to grind the burrs on the walls of the special-shaped holes to achieve a burr-free technical effect, eliminating the subsequent manual grinding process, greatly shortening the construction period, and improving production speed and corporate competitiveness.

[0029] The above disclosures are only several specific embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A method for machining burr-free special-shaped holes, characterized in that: The following steps are involved: Obtain a PCB board, and form a special-shaped hole on the PCB board; A grinding hole is opened at the intersection of the special-shaped holes, and the projection area formed by the aperture of the grinding hole completely covers the burrs formed at the intersection, so that the burrs at the intersection are removed.

2. The method for machining burr-free special-shaped holes according to claim 1, characterized in that: The steps of preparing the special-shaped hole include: Two intersecting cutter lines are preset, and a first size cutter cuts along the cutter lines in sequence to obtain the special-shaped hole.

3. The method for machining burr-free special-shaped holes according to claim 2, characterized in that: The preset knife line also includes: Acquire a standard board surface, and scan the board surface of the PCB board to obtain a workpiece board surface; Comparing the workpiece plate surface with the standard plate surface to determine the starting point of the knife line; The cut line is generated based on the cut line starting point.

4. The method for machining burr-free special-shaped holes according to claim 3, characterized in that: The step of determining the starting point of the knife line comprises: Generate standard coordinates of the expected standard cutter line starting point according to the standard plate surface; Generating a first coordinate system according to a first side edge of the workpiece plate surface, and generating a second coordinate system according to a second side edge thereof; The standard plate surface and the workpiece plate surface are overlapped in equal proportion, so as to obtain knife line coordinates from the first coordinate system and the second coordinate system, and the knife line coordinates have the same vertical position as the standard coordinates; The knife line coordinates are used as the knife line starting point.

5. The method for machining burr-free special-shaped holes according to claim 4, characterized in that: The cutting direction of one of the knife lines is from the starting point of the knife line to the first side edge, and the cutting direction of the other knife line is from the starting point of the knife line to the second side edge.

6. The method for machining burr-free special-shaped holes according to claim 5, characterized in that: The intersection angle of the two knife lines is 90°.

7. The method for machining burr-free special-shaped holes according to claim 2, characterized in that: The step of forming the puncture hole comprises: Acquire the inner angle position formed by the special-shaped hole, and determine the burr position according to the inner angle position as the intersection; forming a burr removal area so that the burr removal area completely covers the area formed by the burrs; The burr removal area is drilled by a second size tool to form the burr hole.

8. The method for machining burr-free special-shaped holes according to claim 7, characterized in that: The tool diameter of the first-sized tool is greater than the tool diameter of the second-sized tool.

9. The method for machining burr-free special-shaped holes according to claim 8, characterized in that: The tool diameter of the first-size tool is 0.05 mm.

10. The method for machining burr-free special-shaped holes according to claim 8, characterized in that: The tool diameter of the second-sized tool is 0.1-0.5 mm.

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