A tool for polishing the side of a metal enclosure

Abstract

The utility model relates to the technical field of semiconductor packaging application, concretely is a kind of frock of polishing metal enclosure frame side, including positioning column, locating plug and enclosure frame, the positioning column includes first combination part, side positioning part and bottom surface positioning part, the bottom surface positioning part with the side positioning part bottom fixed connection, the first combination part with the side positioning part top fixed connection, the locating plug includes second combination part and top handle, the second combination part with the top handle fixed connection, the second combination part is inserted into the first combination part, the enclosure frame is sleeved in the side positioning part, by above-mentioned frock, overcome the defects of prior art, can after metal enclosure frame processing forming, the appearance of enclosure frame is polished smooth, satisfies the requirement of manufacturer to enclosure frame appearance.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor packaging application technology, specifically a tooling for grinding the side of a metal frame. Background Technology

[0002] As is well known, in today's semiconductor packaging industry, metal frames are commonly used for sealing ceramics or glass. During use, high requirements are placed on the flatness and appearance of each surface of the frame. For example, from a practical point of view, the outer edge of the frame should be free of burrs, and the edge line viewed vertically should be smooth. Some manufacturers have even higher requirements for appearance. To address this, problems can be reduced during the forming process, such as upgrading the wire cutting process from low-precision fast wire EDM to medium or slow wire EDM. Alternatively, a surface treatment process can be added after forming. The purpose of this utility model is to overcome the defects of the prior art and provide a fixture for grinding the outer surface of the metal frame after forming, so as to smooth the outer surface of the frame and meet the manufacturer's requirements for the appearance of the frame. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a tooling for grinding the sides of a metal frame.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model provides the following technical solution: a tooling for grinding the side of a metal frame, comprising a positioning post, a positioning block, and a frame. The positioning post includes a first connecting part, a side positioning part, and a bottom positioning part. The bottom positioning part is fixedly connected to the bottom of the side positioning part. The first connecting part is fixedly connected to the top of the side positioning part. The positioning block includes a second connecting part and a top handle. The second connecting part is fixedly connected to the top handle. The second connecting part extends into the first connecting part. The frame is fitted onto the side positioning part.

[0007] To avoid grinding the frame, this utility model is improved by ensuring that the outer dimensions of the bottom positioning part are not flush with or higher than the outer dimensions of the frame.

[0008] To avoid grinding the frame, this utility model has an improvement: the outer dimensions of the top handle cannot be flush with or higher than the outer dimensions of the frame.

[0009] To prevent the frame from being worn by the positioning posts, this utility model is improved by using polyamide material for both the positioning posts and the positioning plugs.

[0010] (III) Beneficial Effects

[0011] Compared with the prior art, this utility model provides a tooling for grinding the side of a metal frame, which has the following advantages:

[0012] This fixture for polishing the sides of metal frames utilizes a combination of positioning posts and positioning blocks. The size adaptation and interference fit design of the side positioning parts ensure precise positioning of the frame, preventing any shaking during polishing. The outer dimensions of the bottom positioning part and the top handle are smaller than the frame itself, avoiding interference with the polishing operation and ensuring uniform polishing across the entire side of the frame, eliminating processing dead angles. The positioning posts and positioning blocks are made of polyamide, whose wear-resistant, self-lubricating, and lightweight properties prevent wear on the frame surface while improving ease of operation. This fixture effectively solves the surface treatment problem after metal frame processing, smoothing the outer surface of the frame to meet manufacturers' high requirements for frame appearance and precision, thus improving the processing quality and efficiency of metal frames used in semiconductor packaging. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This utility model Figure 1 Schematic diagram of the central positioning column;

[0015] Figure 3 This utility model Figure 1 Schematic diagram of the middle positioning block;

[0016] Figure 4 This utility model Figure 1 Schematic diagram of the middle frame structure;

[0017] In the diagram: 1. Positioning post; 2. First joint; 3. Side positioning part; 4. Bottom positioning part; 5. Positioning block; 6. Second joint; 7. Top handle; 8. Frame. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-4A tooling for polishing the side of a metal frame includes a positioning post 1, a positioning block 5, and a frame 8. The positioning post 1 includes a first connecting part 2, a side positioning part 3, and a bottom positioning part 4. The bottom positioning part 4 is fixedly connected to the bottom of the side positioning part 3, and the first connecting part 2 is fixedly connected to the top of the side positioning part 3. The positioning block 5 includes a second connecting part 6 and a top handle 7. The second connecting part 6 is fixedly connected to the top handle 7 and extends into the first connecting part 2. The frame 8 is fitted onto the side positioning part 3.

[0020] In this embodiment, the frame 8 is fitted onto the outside of the side positioning part 3. The first connecting part 2 and the second connecting part 6 of the positioning block 5 form a fitting structure. Specifically, the outer diameter of the second connecting part 6 matches the inner diameter of the first connecting part 2. After assembly, the gap is controlled within 0.05-0.1mm to ensure that there is no significant shaking when the positioning post 1 and the positioning block 5 are connected. The cross-sectional dimensions of the side positioning part 3 are customized according to the inner contour of the frame 8. An interference fit design with an interference amount of 0.02-0.08mm is adopted so that the frame 8 is circumferentially fixed through elastic deformation after being fitted. After the frame 8 is assembled in place, its inner diameter is smaller than that of the bottom surface. The outer dimensions of the positioning part 4 form an axial positioning step—the bottom of the frame 8 is completely fitted with the top surface of the bottom positioning part 4, with a positioning accuracy of ≤0.1mm, avoiding movement during grinding. During grinding, the side of the frame 8 is completely exposed outside the positioning post 1, and can be ground at a uniform speed (50-100mm / s) in the vertical direction by a belt sander or grinding tool. After completion, the positioning plug 5 is removed to release the top constraint, and then the frame 8 is pulled out upwards to achieve rapid demolding. This positioning structure ensures a stable and reliable grinding process through the dual limitation of "radial interference + axial step", and the surface roughness can reach Ra≤1.6μm.

[0021] In this embodiment, the outer dimensions of the bottom positioning part 4 must be strictly smaller than the outer dimensions of the frame 8, with the difference controlled within the range of 1-3mm. This design ensures that the bottom positioning part 4 is completely hidden inside the frame 8, preventing its edge from exceeding the bottom contour of the frame 8, thereby preventing the grinding equipment from contacting the bottom positioning part 4 and ensuring that the grinding operation only acts on the side of the frame 8, effectively avoiding grinding blind spots or surface damage caused by tooling interference.

[0022] In this embodiment, the outer dimensions of the top handle 7 need to be significantly smaller than the outer dimensions of the frame 8, and the radial distance between the two is maintained at 2-5mm. With this design, the top handle 7 is completely recessed within the top surface contour of the frame 8, ensuring that the movement trajectory of the grinding equipment is not interfered with by the handle, and avoiding the grinding tool being unable to make vertical contact with the upper side of the frame due to the handle edge extending beyond the top surface of the frame. This ensures that the sides of the frame 8 can be uniformly ground throughout the entire height range, eliminating the processing dead corners in the top area.

[0023] In this embodiment, both the positioning post 1 and the positioning plug 5 are made of polyamide (PA) material, which has excellent wear resistance (wear loss ≤ 10mm). 3 / 10 3 With its self-lubricating properties and a coefficient of friction of 0.15-0.3, and a hardness (Shore D80-85) lower than that of metal frames, polyamide material avoids scratches or wear caused by rigid contact during positioning. Furthermore, its lightweight properties (density 1.1-1.2 g / cm³) further enhance its advantages. 3 This helps reduce the overall weight of the tooling, improves ease of operation, and ensures that the frame 8 maintains surface integrity during clamping and polishing.

[0024] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tooling for grinding the side of a metal frame, comprising a positioning post (1), a positioning plug (5), and a frame (8), characterized in that: The positioning post (1) includes a first connecting part (2), a side positioning part (3) and a bottom positioning part (4). The bottom positioning part (4) is fixedly connected to the bottom of the side positioning part (3). The first connecting part (2) is fixedly connected to the top of the side positioning part (3). The positioning block (5) includes a second connecting part (6) and a top handle (7). The second connecting part (6) is fixedly connected to the top handle (7). The second connecting part (6) extends into the first connecting part (2). The frame (8) is fitted onto the side positioning part (3).

2. The tooling for grinding the side of a metal frame according to claim 1, characterized in that: The outer dimensions of the bottom positioning part (4) cannot be flush with or higher than the outer dimensions of the frame (8).

3. The tooling for grinding the side of a metal frame according to claim 2, characterized in that: The outer dimensions of the top handle (7) must not be flush with or higher than the outer dimensions of the frame (8).

4. The tooling for grinding the side of a metal frame according to claim 3, characterized in that: The positioning post (1) and the positioning plug (5) are made of polyamide.

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