Glass ceramic vertical milling and thinning electric spindle

Abstract

The utility model relates to the technical field of grinding equipment, in particular to a glass ceramic vertical grinding thinning motorized spindle which comprises a motorized spindle body, a rotating shaft is coaxially arranged on the motorized spindle body, a grinding wheel support is arranged on the rotating shaft, a grinding wheel is arranged on the grinding wheel support, a fixed sleeve is arranged on the grinding wheel support, and the fixed sleeve is provided with a fixed shaft. The fixed sleeve is coaxially connected to the rotating shaft in a sleeving mode, a fixing assembly is arranged between the grinding wheel support and the rotating shaft, a lock nozzle positioning taper hole is formed in the end, away from the electric spindle body, of the rotating shaft, a standard lock nozzle is inserted into the lock nozzle positioning taper hole, a milling cutter is arranged on the standard lock nozzle, and the milling cutter is connected with the grinding wheel support. The milling cutter and the rotating shaft are coaxially arranged, and a fastening assembly is arranged between the standard locking nozzle and the rotating shaft. The mobile phone rear cover grinding device has the advantages that the machining yield of the mobile phone rear cover is increased, the product quality is improved, and meanwhile the grinding precision of the mobile phone rear cover is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of grinding equipment, and in particular to a glass-ceramic vertical grinding thinning electric spindle. Background Technology

[0002] Glass is an amorphous solid material, usually transparent or translucent, made by rapidly cooling inorganic minerals (such as quartz sand, soda ash, limestone, etc.) after melting at high temperatures. Ceramics, on the other hand, are materials formed by solidifying natural or synthetic inorganic non-metallic materials through high-temperature sintering, possessing properties such as high strength, high-temperature resistance, and corrosion resistance. Glass and ceramics are widely used in consumer electronics such as mobile phones. Due to their unique physical and chemical properties and aesthetic value, they are often used to enhance the performance, durability, and design of mobile phones. Currently, when glass and ceramics are used as back covers for mobile phones, they need to be ground to meet shape and size requirements. Grinding of mobile phone back covers is generally done using CNC machine tools or other grinding machines, utilizing grinding wheels to grind the glass or ceramic to achieve the required thickness and appearance.

[0003] Currently, when grinding mobile phone back covers, the spindle typically places the back cover on a machine tool fixture, and the machine tool's grinding wheel rotates to grind the back cover. However, before placing the back cover on the fixture, the fixture needs to be milled to ensure that the coordinates of the fixture and the back cover are consistent, and positioning points are machined on the back cover for positioning. Currently, the machine tool spindle and the milling cutter are generally connected and fixed by the milling cutter shank and the spindle chuck. After milling the fixture, the milling cutter is removed and the grinding wheel is installed. However, the straight shank of the spindle's grinding wheel and the milling cutter shank are interchangeable and can both be installed on the same chuck. The diameter of the grinding wheel's straight shank is smaller than the diameter of the grinding wheel itself. When installed on the spindle chuck, the grinding wheel's fixing rigidity is insufficient, resulting in poor stability. During grinding of the mobile phone back cover, the grinding wheel is prone to vibration due to insufficient mounting rigidity, which can cause texture on the surface of the back cover during the grinding process, affecting product quality and resulting in a low processing yield. Summary of the Invention

[0004] In order to improve the processing yield of mobile phone back covers and improve product quality, this utility model provides a glass-ceramic vertical grinding and thinning electric spindle to address the problems of the prior art.

[0005] This utility model provides a glass-ceramic vertical grinding and thinning electric spindle, which adopts the following technical solution:

[0006] A glass-ceramic vertical grinding and thinning electric spindle includes an electric spindle body, a rotating shaft coaxially disposed on the electric spindle body, a grinding wheel support disposed on the rotating shaft, a grinding wheel disposed on the grinding wheel support, a fixing sleeve disposed on the grinding wheel support, the fixing sleeve being coaxially sleeved on the rotating shaft, a fixing assembly disposed between the grinding wheel support and the rotating shaft, a locking nozzle positioning conical hole disposed at the end of the rotating shaft away from the electric spindle body, a locking nozzle being inserted into the locking nozzle positioning conical hole, a milling cutter disposed on the locking nozzle, the milling cutter being coaxially disposed with the rotating shaft, and a fastening assembly disposed between the locking nozzle and the rotating shaft.

[0007] Preferably, the fixing component includes a raised edge disposed on the circumferential surface of the rotating shaft, a fixing threaded sleeve disposed on the end face of the rotating shaft away from the electric spindle body, and a grinding wheel bracket locking nut threaded onto the fixing threaded sleeve. One end face of the fixing sleeve abuts against the raised edge, and the grinding wheel bracket locking nut abuts against the other end face of the fixing sleeve.

[0008] Preferably, the fastening assembly includes a fastening threaded sleeve disposed on the end of the fixed threaded sleeve away from the rotating shaft, and a locking nut threaded onto the fastening threaded sleeve. The diameter of the fastening threaded sleeve is smaller than the diameter of the fixed threaded sleeve, and the end of the locking nut abuts against the inner wall of the locking nut.

[0009] Preferably, the grinding wheel support is provided with a fixing ring, the grinding wheel is fixedly embedded in the fixing ring, and the grinding wheel support and the fixing ring are threadedly connected by multiple screws.

[0010] Preferably, the grinding wheel is a diamond grinding wheel.

[0011] Preferably, the grinding wheel support is frustum-shaped, with the larger end of the grinding wheel support connected to the grinding wheel and the smaller end of the grinding wheel support connected to the fixing sleeve.

[0012] Preferably, the grinding wheel support is provided with multiple heat dissipation holes.

[0013] In summary, this utility model includes at least one of the following beneficial technical effects of glass-ceramic vertical grinding and thinning electric spindles:

[0014] 1. When machining the positioning points of the mobile phone back cover fixture, the operator inserts the milling cutter into the locking nozzle and then tightens the locking nozzle nut to fix the nozzle and the milling cutter in place. This ensures that the milling cutter and the rotating shaft remain coaxial, without needing to remove the grinding wheel bracket. The milling cutter and grinding wheel are located on the same spindle, resulting in a higher precision fit and better guaranteeing the accuracy of the milling cutter's milling of the fixture, thus improving the grinding precision of the mobile phone back cover. 2. When grinding the mobile phone back cover, the milling cutter is removed, and the back cover is placed on the fixture. The positioning points position the back cover, and the electric spindle body drives the grinding wheel to rotate and grind the back cover. The high rigidity of the connection between the grinding wheel and the rotating shaft prevents the grinding wheel from vibrating during grinding, resulting in less surface texture and higher grinding precision. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a cross-sectional schematic diagram of the present invention.

[0017] Figure 3 This is an exploded view of the present invention.

[0018] Figure 4 This is an exploded view of the present invention.

[0019] Figure 5 This is a schematic diagram showing the assembly relationship between the grinding wheel and the electric spindle body in this utility model.

[0020] Figure 6 This is a schematic diagram showing the assembly relationship between the milling cutter and the electric spindle body in this utility model.

[0021] In the diagram: 1. Electric spindle body; 11. Rotating shaft; 111. Locking nozzle positioning cone hole; 112. Protruding edge; 113. Clearance hole; 12. Fixed threaded sleeve; 121. Grinding wheel bracket locking nut; 13. Fastening threaded sleeve; 131. Locking nozzle nut; 2. Grinding wheel bracket; 21. Grinding wheel; 22. Fixed sleeve; 23. Fixed ring; 24. Heat dissipation hole; 3. Locking nozzle; 31. End mill; Detailed Implementation

[0022] 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.

[0023] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. 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, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] This utility model discloses a glass-ceramic vertical grinding and thinning electric spindle, as shown in Figures 1-6. It includes an electric spindle body 1, a motor fixedly installed inside the spindle body 1, and a rotating shaft 11 coaxially mounted on the spindle body 1. The rotating shaft 11 is coaxially and fixedly connected to the output shaft of the motor. A grinding wheel support 2 is mounted on the rotating shaft 11. The grinding wheel support 2 is frustum-shaped, with a fixed sleeve 22 integrally formed at its small end and a grinding wheel 21 mounted at its large end. The grinding wheel support 2 is coaxially mounted with the rotating shaft 11, and the fixed sleeve 22 is inserted into and fitted onto the rotating shaft 11. The rotating shaft 11 is cylindrical, which facilitates machining of the rotating shaft 11 and achieves higher machining accuracy.

[0025] Meanwhile, a fixing assembly is provided between the grinding wheel holder 2 and the rotating shaft 11. Specifically, the fixing assembly includes a flange 112 integrally formed on the circumferential surface of the rotating shaft 11, a fixing threaded sleeve 12 integrally formed on the end face of the rotating shaft 11 away from the electric spindle body 1, and a grinding wheel holder locking nut 121 threaded onto the fixing threaded sleeve 12. The fixing threaded sleeve 12 is coaxially arranged with the rotating shaft 11. One end face of the fixing sleeve 22 is attached to one side surface of the flange 112, while one end face of the grinding wheel holder locking nut 121 is attached to the other end face of the fixing sleeve 22. When installing the grinding wheel holder 2, the operator inserts the fixing sleeve 22 of the grinding wheel holder 2 into the rotating shaft 11, so that the fixing sleeve 22 is attached to the flange 112, and then threadedly attaches the grinding wheel holder locking nut 121 onto the fixing threaded sleeve 12. Tighten the grinding wheel bracket locking nut 121 so that it fits against the fixing sleeve 22, thus fixing the grinding wheel bracket 2 in place.

[0026] Meanwhile, the grinding wheel 21 is arranged in a ring shape and is coaxially mounted with the grinding wheel bracket 2. The rotation of the grinding wheel 21 allows for grinding of the phone's back cover. The grinding wheel 21 is a diamond grinding wheel, which has high hardness and a long service life, enabling high-precision grinding of the phone's back cover for extended periods. Additionally, the grinding wheel bracket 2 is equipped with a fixing ring 23, which is coaxially mounted with the grinding wheel 21. A portion of the grinding wheel 21 is fixedly embedded within the fixing ring 23. Multiple screws connect the grinding wheel bracket 2 and the fixing ring 23. When the grinding wheel 21 needs to be replaced, the operator can unscrew the screws to remove the fixing ring 23 and the grinding wheel 21, allowing for replacement with a new grinding wheel 21 without replacing the entire grinding wheel bracket 2. Multiple heat dissipation holes 24 are spaced circumferentially on the side of the grinding wheel bracket 2. These holes dissipate heat accumulated within the grinding wheel bracket during the grinding of the phone's back cover.

[0027] In addition, a locking nozzle positioning cone hole 111 is provided at the end of the rotating shaft 11 away from the electric spindle body 1. The locking nozzle positioning cone hole 111 is coaxially arranged with the rotating shaft 11. A locking nozzle 3 is inserted into the locking nozzle positioning cone hole 111. The locking nozzle 3 is also called a cable nozzle. The locking nozzle 3 is existing technology and will not be described in detail here. A milling cutter 31 is mounted on the locking nozzle 3 and inserted into it. The milling cutter 31 is coaxially mounted with the rotating shaft 11. A fastening assembly is provided between the locking nozzle 3 and the rotating shaft 11. Specifically, the fastening assembly includes a fastening threaded sleeve 13 integrally formed on the end of the fixed threaded sleeve 12 away from the rotating shaft, and a locking nozzle nut 131 threaded onto the fastening threaded sleeve 13. The end of the locking nozzle 3 abuts against the inner wall of the locking nozzle nut 131. The fastening threaded sleeve 13 is coaxially mounted with the rotating shaft 11, and the diameter of the fastening threaded sleeve 13 is smaller than the diameter of the fixed threaded sleeve 12. This allows the grinding wheel bracket locking nut 121 to pass through the fastening threaded sleeve 13. The operator inserts the locking nozzle 3 into the locking nozzle positioning cone hole 111, inserts the milling cutter 31 into the locking nozzle 3, and then tightens the locking nozzle nut 131. The milling cutter 31 is fixed in place, and the locking nut 131 secures the locking nozzle 3 to the rotating shaft 11. The locking nozzle positioning cone hole 111 positions the locking nozzle 3 and the milling cutter 31, ensuring that the milling cutter 31 and the rotating shaft 11 remain coaxial. Simultaneously, a clearance hole 113 is provided inside the rotating shaft 11. This allows the clearance hole 113 to prevent the locking nozzle from protruding when it is inserted into the locking nozzle positioning cone hole 111.

[0028] The implementation principle of the vertical grinding and thinning electric spindle for glass and ceramics according to this utility model embodiment is as follows: When machining the positioning point of the mobile phone back cover fixture, the operator inserts the milling cutter 31 into the locking nozzle 3, and then tightens the locking nozzle nut 131 to fix the locking nozzle 3 and the milling cutter 31, so that the milling cutter 31 and the rotating shaft 11 remain coaxial, without having to remove the grinding wheel bracket 2. The milling cutter 31 and the grinding wheel 21 are located on the same spindle, and the precision fit between the milling cutter 31 and the grinding wheel 21 is higher, which can better ensure the milling accuracy of the milling cutter 31 for the fixture and improve the grinding accuracy of the mobile phone back cover; the operation of the electric shaft body causes the rotating shaft 11 to rotate, and the machine tool drives the milling cutter 31 to move in the XYZ three-dimensional direction to process the fixture, thereby making the positioning point of the fixture consistent with the coordinates set by the machine tool; when grinding the mobile phone back cover, the operator unscrews the locking nozzle nut 131 to remove the milling cutter 31. Remove the phone back cover and place it on the fixture. Position the phone back cover with the positioning point. The electric spindle body 1 can drive the grinding wheel 21 to rotate and grind the phone back cover. The connection between the grinding wheel and the rotating shaft is rigid, so the grinding wheel is not easy to vibrate when grinding the phone back cover. As a result, the surface of the phone back cover is not easy to produce texture after grinding, and the grinding precision is higher.

[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A glass-ceramic vertical grinding and thinning electric spindle, characterized in that: The device includes an electric spindle body (1), a rotating shaft (11) is coaxially mounted on the electric spindle body (1), a grinding wheel bracket (2) is mounted on the rotating shaft (11), a grinding wheel (21) is mounted on the grinding wheel bracket (2), a fixing sleeve (22) is mounted on the grinding wheel bracket (2), the fixing sleeve (22) is coaxially sleeved on the rotating shaft (11), a fixing component is provided between the grinding wheel bracket (2) and the rotating shaft (11), a locking nozzle positioning cone hole (111) is provided at one end of the rotating shaft (11) away from the electric spindle body (1), a locking nozzle (3) is inserted into the locking nozzle positioning cone hole (111), a milling cutter (31) is mounted on the locking nozzle (3), the milling cutter (31) is coaxially mounted with the rotating shaft (11), and a fastening component is provided between the locking nozzle (3) and the rotating shaft (11).

2. The glass-ceramic vertical grinding and thinning electric spindle according to claim 1, characterized in that: The fixing assembly includes a raised edge (112) disposed on the circumferential surface of the rotating shaft (11), a fixed threaded sleeve (12) disposed on the end face of the rotating shaft (11) away from the electric spindle body (1), and a grinding wheel bracket locking nut (121) threaded onto the fixed threaded sleeve (12). One end face of the fixing sleeve (22) abuts against the raised edge (112), and the grinding wheel bracket locking nut (121) abuts against the other end face of the fixing sleeve (22).

3. The glass-ceramic vertical grinding and thinning electric spindle according to claim 2, characterized in that: The fastening assembly includes a fastening threaded sleeve (13) disposed on the end of the fixed threaded sleeve (12) away from the rotating shaft, and a locking nut (131) threaded onto the fastening threaded sleeve (13). The diameter of the fastening threaded sleeve (13) is smaller than the diameter of the fixed threaded sleeve (12), and the end of the locking nut (3) abuts against the inner wall of the locking nut (131).

4. The glass-ceramic vertical grinding and thinning electric spindle according to claim 1, characterized in that: The grinding wheel bracket (2) is provided with a fixing ring (23), the grinding wheel (21) is fixedly embedded in the fixing ring (23), and there are multiple screws threadedly connecting the grinding wheel bracket (2) and the fixing ring (23).

5. A glass-ceramic vertical grinding and thinning electric spindle according to claim 1, characterized in that: The grinding wheel (21) is a diamond grinding wheel (21).

6. A glass-ceramic vertical grinding and thinning electric spindle according to claim 1, characterized in that: The grinding wheel support (2) is frustum-shaped. The large end of the grinding wheel support (2) is connected to the grinding wheel (21), and the small end of the grinding wheel support (2) is connected to the fixing sleeve (22).

7. A glass-ceramic vertical grinding and thinning electric spindle according to claim 1, characterized in that: The grinding wheel support (2) is provided with multiple heat dissipation holes (24).

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