CNC precious metal milling machine

Abstract

The utility model relates to a CNC precious metal milling machine which comprises a base provided with a first sliding rail extending in the first direction; the supporting base is arranged on the first sliding rail, can slide in the first direction and is provided with a second sliding rail and a third sliding rail which extend in the second direction perpendicular to the first direction; the milling head mechanism is supported on the second sliding rail and the third sliding rail, and a milling head faces to machine precious metal; wherein the direction perpendicular to the first direction and the second direction is marked as a third direction; the supporting base comprises a base plate connected with the first sliding rail, first supporting arms embedded into the base plate in the first direction, second supporting arms embedded into the base plate in the second direction and connected with the first supporting arms in a clamped mode, a first supporting rod and a second supporting rod, the first supporting rod and the second supporting rod are connected between the two second supporting arms, and the second sliding rail is arranged on the first supporting rod. The third sliding rail is arranged on the second supporting rod, the top face of the second sliding rail faces the first direction, and the top face of the third sliding rail faces the third direction, so that stable supporting is provided for transmission of the milling head mechanism, and the machining precision is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of milling machines, and in particular to a CNC precious metal milling machine. Background Art

[0002] In the field of precious metal processing, especially in the manufacturing industry, high-precision processing equipment is crucial for producing high-quality products. Traditional mechanical processing methods can no longer meet the growing demand for precision and surface quality requirements for precious metal parts. Therefore, CNC (computer numerical control) precious metal milling machines and other CNC processing equipment have gradually become indispensable and important tools in the manufacturing industry. Precious metal parts often have complex geometric shapes and tiny size requirements, and need to be precisely processed in multiple directions. In existing designs, three-axis transmission of the milling head mechanism is the main processing method, and the smoothness of the transmission process is an important factor affecting the processing accuracy. Among them, the milling head mechanism is usually suspended on a support base, and Y-axis and Z-axis transmission processing needs to be performed on the support base. Whether the support base can provide effective and stable support is an important factor affecting the transmission and processing accuracy. Therefore, it is necessary to provide a CNC precious metal milling machine with stable support and smooth processing to ensure processing accuracy. Utility Model Content

[0003] The purpose of this application is to provide a CNC precious metal milling machine with stable support and smooth processing to ensure processing accuracy.

[0004] According to one aspect of the present application, a CNC precious metal milling machine is provided, comprising:

[0005] The base is provided with a first slide rail extending along a first direction;

[0006] A support seat is provided on the first slide rail and is slidable along a first direction, and is provided with a second slide rail and a third slide rail extending along a second direction perpendicular to the first direction;

[0007] a milling head mechanism supported on the second slide rail and the third slide rail, and the milling head is oriented to process precious metals; wherein a direction perpendicular to the first direction and the second direction is respectively referred to as a third direction;

[0008] The support seat includes: a seat plate connected to the first slide rail, a first support arm embedded in the seat plate along a first direction, a second support arm embedded in the seat plate along a second direction and clamped with the first support arm, and a first support rod and a second support rod connected between the two second support arms, the second slide rail is arranged on the first support rod, the third slide rail is arranged on the second support rod, and the top surface of the second slide rail faces the first direction, and the top surface of the third slide rail faces the third direction.

[0009] More preferably, the milling machine further comprises: a first sliding block provided between the first slide rail and the seat plate, and the support seat and the base are slidably connected to the first slide rail via the slide rail.

[0010] More preferably, the seat plate comprises:

[0011] a plate body, one end of the first slider being connected to the plate body, the other end of the slide rail being slidably connected to the first slide rail along a first direction, the base comprising two first slide rails arranged opposite to each other, the two plate bodies being arranged in a one-to-one correspondence with the two first slide rails;

[0012] A first embedding groove is formed on the two plates along a first direction, and the first support arm is embedded in the first embedding groove and connected to the plates;

[0013] The second embedding groove is formed on the two plates along the second direction, and the second embedding grooves on the two plates are arranged opposite to each other. The second support arm is embedded in the second embedding groove and connected to the plates.

[0014] More preferably, the first support arm comprises:

[0015] A first arm body is perpendicular to the plate surface of the plate body;

[0016] A first embedding portion is formed on the first arm body and extends along the third direction, and is embedded in the first embedding groove along the first direction to be connected to the plate body;

[0017] The third embedding groove is formed on the first arm body along the second direction and is embedded in the second supporting arm and connected to the second supporting arm.

[0018] More preferably, the second support arm comprises:

[0019] a second arm body, being perpendicular to the plate body and the plate surface of the first arm body respectively;

[0020] a second embedded portion extending along the third direction and formed on the second arm body, and embedded in the second embedded groove along the third direction and connected to the plate body;

[0021] The third embedding portion is formed on the second arm body and extends along the first direction, and is embedded in the third embedding groove along the first direction to be connected with the first arm body.

[0022] More preferably, the milling machine further comprises: a support block provided between the first support rod and the second support rod.

[0023] More preferably, the first support rod includes a first surface parallel to the plate surface of the first arm body and extending along the second direction, and the second slide rail is provided on the first surface.

[0024] More preferably, the second support rod includes a second surface parallel to the plate surface of the plate body and extending along the second direction, and the third slide rail is provided on the second surface.

[0025] More preferably, the milling machine further comprises:

[0026] a motor, disposed on the base;

[0027] A thread rolling shaft is provided on the base along a first direction and is connected to the output shaft of the motor.

[0028] The thread rolling bearing is arranged on the support seat and connected to the thread rolling shaft. The torque output by the motor drives the thread rolling shaft to rotate, thereby driving the support seat connected to the thread rolling bearing to slide along the first direction.

[0029] More preferably, the milling machine further comprises:

[0030] a second sliding block, disposed between the second slide rail and the milling head mechanism;

[0031] The third sliding block is arranged between the third sliding rail and the milling head mechanism.

[0032] This application has the following beneficial effects:

[0033] By arranging a first support rod and a second support rod connected between two second support arms on the support seat, and arranging the second slide rail on the first support rod, and the third slide rail on the second support rod, and the top surface of the second slide rail facing the first direction, and the top surface of the third slide rail facing the third direction, stable support is provided for the transmission of the milling head mechanism to ensure processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the implementation methods or the description of the prior art. Obviously, the drawings described below are only some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 This is a schematic diagram of the three-dimensional structure of a milling machine according to one embodiment of the present application;

[0036] Figure 2 A schematic diagram of the three-dimensional structure of a milling machine according to an embodiment of the present application from another perspective;

[0037] Figure 3 This is a schematic diagram of the three-dimensional structure of the support base according to one embodiment of the present application;

[0038] Figure 4 This is a schematic diagram of the three-dimensional structure of the support base according to one embodiment of the present application from another perspective;

[0039] Figure 5 This is a schematic diagram of the exploded structure of the support base according to one embodiment of the present application;

[0040] Figure 6 This is a front view of the support base according to one embodiment of the present application;

[0041] Figure 7 A top view of a support base according to an embodiment of the present application;

[0042] Figure 8 A side view of a support base according to an embodiment of the present application;

[0043] Description of Figure Numbers:

[0044] 100. The milling machine includes: 10. Base; F1. First direction; 11. First slide rail; 20. Support seat; F2. Second direction; 21. Second slide rail; 22. Third slide rail; 30. Milling head mechanism; F3. Third direction; 23. Seat plate; 24. First support arm; 25. Second support arm; 26. First support rod; 27. Second support rod; 41. First slider; 231. Plate body; 232. First embedding groove; 233. Second embedding groove; 241. First arm body; 242. First embedding part; 243. Third embedding groove; 251. Second arm body; 252. Second embedding part; 253. Third embedding part; 50. Support block; 261. First surface; 271. Second surface; 61. Motor; 62. Rolling shaft; 63. Rolling bearing; 42. Second slider; 43. Third slider. DETAILED DESCRIPTION

[0045] To facilitate understanding of the present application, a more comprehensive description of the present application will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present application.

[0046] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0048] Please refer to Figure 1 - Figure 8 In one embodiment of the present application, a CNC precious metal milling machine is provided, which includes 100 : a base 10 , a support base 20 and a milling head mechanism 30 .

[0049] The base 10 is provided with a first slide rail 11 extending along a first direction F1. The support base 20 is mounted on the first slide rail 11 and is slidable along the first direction F1. It is also provided with a second slide rail 21 and a third slide rail 22 extending along a second direction F2 perpendicular to the first direction F1. The milling head mechanism 30 is supported on the second and third slide rails 21, 22, and is oriented for processing precious metals. The direction perpendicular to the first and second directions F1, F2, is designated as a third direction F3.

[0050] The first slide rail 11 on the base 10 enables the support base 20 to slide smoothly along a first direction F1. The second and third slide rails 21 and 22 provide support in two other directions perpendicular to the first direction F1. These two perpendicular support rails allow the milling head mechanism 30 to move precisely in two directions within a plane. Adjustment in these two directions enables two-dimensional machining of workpieces, meeting the processing requirements of precious metal parts of varying shapes and sizes.

[0051] The support seat 20 includes a seat plate 23 , a first support arm 24 , a second support arm 25 , a first support rod 26 and a second support rod 27 .

[0052] The seat plate 23 is connected to the first slide rail 11. The first support arm 24 is embedded in the seat plate 23 along the first direction F1. The second support arm 25 is embedded in the seat plate 23 along the second direction F2 and is engaged with the first support arm 24. The first support rod 26 and the second support rod 27 are connected between the two second support arms 25. The second slide rail 21 is mounted on the first support rod 26, and the third slide rail 22 is mounted on the second support rod 27. The top surface of the second slide rail 21 faces the first direction F1, and the top surface of the third slide rail 22 faces the third direction F3.

[0053] The seat plate 23, as a primary component of the support base 20, connects to the first slide rail 11, ensuring stable support and smooth sliding of the entire support base 20 in the first direction F1. This connection allows the support base 20 to move freely in the first direction F1, enabling workpiece feeding and positioning. The first support arm 24, embedded in the seat plate 23 along the first direction F1, provides stable support and guidance for the milling head mechanism 30 along the first direction F1. This arrangement makes the movement of the milling head along the first direction F1 more precise and controllable during machining. The second support arm 25, embedded in the seat plate 23 along the second direction F2 and engaged with the first support arm 24, ensures stable support for the milling head mechanism 30 in the second direction F2. The engagement with the first support arm 24 further strengthens the connection between the two support arms. The connection between the first support rod 26 and the second support rod 27 is located precisely between the two second support arms 25. This arrangement effectively shares the weight of the milling head mechanism 30 and provides stable support in the third direction F3. The second slide rail 21 is mounted on the first support rod 26, and the third slide rail 22 is mounted on the second support rod 27, with their top surfaces facing the first direction F1 and the third direction F3, respectively. This arrangement ensures stable guidance and movement of the milling head mechanism 30 in the first direction F1 and the third direction F3, thereby achieving precise machining of the workpiece.

[0054] More preferably, the milling machine further includes: a first sliding block 41 .

[0055] The first sliding block 41 is disposed between the first slide rail 11 and the seat plate 23 , and the support seat 20 and the base 10 are slidably connected via the slide rail and the first slide rail 11 .

[0056] More preferably, the seat plate 23 includes a plate body 231 , a first embedding groove 232 and a second embedding groove 233 .

[0057] One end of the first slider 41 is connected to the plate 231, and the other end of the slide rail is slidably connected to the first slide rail 11 along the first direction F1. The base 10 includes two first slide rails 11 arranged opposite each other, and the two plates 231 are arranged in a one-to-one correspondence with the two first slide rails 11. A first insertion groove 232 is formed on the two plates 231 along the first direction F1, and the first support arm 24 is inserted into the first insertion groove 232 and connected to the plates 231. A second insertion groove 233 is formed on the two plates 231 along the second direction F2, and the second insertion grooves 233 on the two plates 231 are arranged opposite each other. The second support arm 25 is inserted into the second insertion groove 233 and connected to the plates 231.

[0058] Among them, the first slider 41 is connected to the plate body 231, and this connection method enables the slide rail to slide smoothly on the plate body 231. Such a design can effectively combine the slide rail with the seat plate 23, thereby increasing the stability and rigidity of the entire structure and ensuring the accuracy and reliability during the processing. The other end of the slide rail is slidably connected to the first slide rail 11 along the first direction F1. Such a design allows the support seat 20 to slide freely in the first direction F1. This free sliding mechanism provides flexibility and adjustability for the feeding and positioning of the workpiece, which is conducive to more precise processing operations. The base 10 includes two first slide rails 11 arranged opposite each other. This arrangement ensures the stability and balance of the support seat 20 in the first direction F1. The opposite arrangement of the two slide rails can ensure that the support seat 20 will not tilt or deflect during the processing, thereby ensuring the accuracy and consistency of the processing. First insertion slots 232 are recessed along the first direction F1 on the two plates 231, while second insertion slots 233 are recessed along the second direction F2 on the two plates 231. The two second insertion slots 233 are positioned opposite each other. This arrangement allows the first support arm 24 and the second support arm 25 to fit into their corresponding slots, firmly connecting them to the base plate 23. This connection creates a robust support structure between the support base 20 and the base plate 23, ensuring stable operation of the milling machine.

[0059] More preferably, the first support arm 24 includes a first arm body 241 , a first embedding portion 242 and a third embedding groove 243 .

[0060] The first arm 241 is perpendicular to the surface of the plate 231. The first embedded portion 242 is formed on the first arm 241 and extends along the third direction F3. It is embedded in the first embedded groove 232 along the first direction F1 and connected to the plate 231. The third embedded groove 243 is recessed in the first arm 241 along the second direction F2 and is embedded in the second support arm 25 and connected to the second support arm 25.

[0061] When the first arm 241 is perpendicular to the surface of the plate 231, the support base 20 can more effectively withstand the force from the milling head mechanism 30 and more easily achieve precise positioning of the workpiece. The first embedded portion 242 is formed on the first arm 241, extending along the third direction F3. It is embedded in the first embedded groove 232 along the first direction F1 and connected to the plate 231. The design of the first embedded portion 242 extending along the third direction F3 and inserting along the first direction F1 enables the first support arm 24 to be securely embedded in the first embedded groove 232 and connected to the plate 231. This arrangement ensures the stability and reliability of the support base 20 during machining, while providing a good support structure. The third embedded groove 243 is recessed in the first arm 241 along the second direction F2 and embedded in the second support arm 25, connecting to the second support arm 25. The design of the third embedded groove 243 allows the second support arm 25 to be securely embedded therein and connected to the first support arm 24. Such a configuration enhances the overall stability of the support base 20 and ensures that the support base 20 does not move or swing during operation, thereby improving the processing accuracy and quality.

[0062] More preferably, the second support arm 25 includes a second arm body 251 , a second embedded portion 252 and a third embedded portion 253 .

[0063] The second arm 251 is perpendicular to the plate 231 and the first arm 241. The second inserting portion 252 is formed on the second arm 251 and extends along the third direction F3. It is inserted into the second inserting groove 233 along the third direction F3 and connected to the plate 231. The third inserting portion 253 is formed on the second arm 251 and extends along the first direction F1. It is inserted into the third inserting groove 243 along the first direction F1 and connected to the first arm 241.

[0064] The perpendicular position of the second arm 251 relative to the plate 231 and the first arm 241 ensures the stability and precision of the support base 20 during machining, while also enabling the support base 20 to better withstand the forces from the milling head mechanism 30. The design of the second embedded portion 252 extending along the third direction F3 and inserting along the third direction F3 enables the second support arm 25 to be securely embedded in the second embedded groove 233 and connected to the base plate 23. This arrangement enhances the structural stability and rigidity of the support base 20, ensuring that the support base 20 will not loosen or shift during operation, thereby improving machining precision and reliability. The design of the third embedded portion 253 extending along the first direction F1 and inserting along the first direction F1 ensures a secure connection between the third support arm and the first support arm 24. This arrangement provides structural stability for the support base 20, prevents the support base 20 from twisting or deforming during operation, and thereby ensures machining precision and efficiency.

[0065] More preferably, the milling machine further includes: a support block 50 .

[0066] Among them, the support block 50 is provided between the first support rod 26 and the second support rod 27. The establishment of the support block 50 can increase the connection stability between the first support rod 26 and the second support rod 27, prevent them from loosening or shifting during use, thereby ensuring the overall stability and structural firmness of the support base 20.

[0067] More preferably, the first support rod 26 includes a first surface 261 .

[0068] The first surface 261 is parallel to the surface of the first arm 241 and extends along the second direction F2. The second slide rail 21 is provided on the first surface 261. The first surface 261 is parallel to the surface of the first arm 241 and extends along the second direction F2, allowing the first support rod 26 to be better aligned with the first arm 241, providing stable support. The provision of the second slide rail 21 on the first surface 261 ensures a smooth motion trajectory for the milling head mechanism 30 during machining, thereby ensuring machining accuracy and quality.

[0069] More preferably, the second support rod 27 includes a second surface 271 .

[0070] The third slide rail 22 is disposed on a second surface 271, which is parallel to the surface of the plate body 231 and extends in the second direction F2. The second surface 271 is parallel to the surface of the plate body 231 and extends in the second direction F2, allowing the second support rod 27 to be tightly connected to the plate body 231, providing stable support. The third slide rail 22 on the second surface 271 ensures a smooth motion trajectory for the milling head mechanism 30 during machining, further ensuring machining accuracy and quality.

[0071] More preferably, the milling machine further includes: a motor 61 , a thread rolling shaft 62 and a thread rolling bearing 63 .

[0072] The motor 61 is mounted on the base 10. A thread rolling shaft 62 is mounted on the base 10 along a first direction F1 and connected to the output shaft of the motor 61. A thread rolling bearing 63 is mounted on the support base 20 and connected to the thread rolling shaft 62. The torque output by the motor 61 drives the thread rolling shaft 62 to rotate, thereby causing the support base 20, which is connected to the thread rolling bearing 63, to slide along the first direction F1.

[0073] Among them, the motor 61 is installed on the base 10, and the motor 61 can be easily connected to the rolling shaft 62, and a stable support structure is provided to ensure the stability and reliability of the motor 61 during operation. The rolling shaft 62 serves as a driving device for the support seat 20 to move along the first direction F1. By being connected to the output shaft of the motor 61, the transmission of the output torque of the motor 61 is realized. When the motor 61 starts and outputs torque, the rolling shaft 62 will rotate, thereby driving the support seat 20 to slide in the first direction F1. The setting of the rolling bearing 63 enables the rolling shaft 62 to rotate smoothly on the support seat 20, reduces the friction resistance during movement, and improves the movement efficiency and stability of the support seat 20. By being connected to the rolling shaft 62, the rolling bearing 63 can effectively support and guide the movement of the rolling shaft 62, ensuring the smooth sliding of the support seat 20 along the first direction F1.

[0074] More preferably, the milling machine further includes a second slide block 42 and a third slide block 43 .

[0075] Among them, the second slider 42 is arranged between the second slide rail 21 and the milling head mechanism 30. The third slider 43 is arranged between the third slide rail 22 and the milling head mechanism 30. The milling head mechanism 30 is the core component of the entire milling machine and is responsible for processing the workpiece. Installing the second slider 42 and the third slider 43 on the second slide rail 21 and the third slide rail 22 can effectively support and fix the milling head mechanism 30 to prevent it from shaking or offsetting during the processing, thereby ensuring the accuracy and stability of the processing. The second slider 42 and the third slider 43 cooperate with the corresponding slide rails to play a guiding and limiting role, ensuring that the milling head mechanism 30 moves along a predetermined trajectory. This helps to control the position and direction of the milling cutter during the processing process, thereby achieving precise processing of the workpiece.

[0076] Thus, by arranging a first support rod 26 and a second support rod 27 connected between the two second support arms 25 on the support seat 20, and arranging the second slide rail 21 on the first support rod 26, and the third slide rail 22 on the second support rod 27, and the top surface of the second slide rail 21 facing the first direction F1, and the top surface of the third slide rail 22 facing the third direction F3, stable support is provided for the transmission of the milling head mechanism 30 to ensure processing accuracy.

[0077] The above-described embodiments merely represent several embodiments of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the spirit of the present application, and such modifications and improvements are all within the scope of protection of the present application.

Claims

1. A CNC precious metal milling machine, characterized in that: The milling machine comprises: The base is provided with a first slide rail extending along a first direction; A support seat is provided on the first slide rail and is slidable along a first direction, and is provided with a second slide rail and a third slide rail extending along a second direction perpendicular to the first direction; a milling head mechanism supported on the second slide rail and the third slide rail, and the milling head is oriented to process precious metals; wherein a direction perpendicular to the first direction and the second direction is respectively referred to as a third direction; The support seat includes: a seat plate connected to the first slide rail, a first support arm embedded in the seat plate along a first direction, a second support arm embedded in the seat plate along a second direction and clamped with the first support arm, and a first support rod and a second support rod connected between the two second support arms, the second slide rail is arranged on the first support rod, the third slide rail is arranged on the second support rod, and the top surface of the second slide rail faces the first direction, and the top surface of the third slide rail faces the third direction.

2. The CNC precious metal milling machine according to claim 1, characterized in that: The milling machine further comprises a first sliding block provided between the first slide rail and the seat plate, and the support seat and the base are slidably connected to the first slide rail via the slide rail.

3. The CNC precious metal milling machine according to claim 2, characterized in that: The seat plate comprises: a plate body, one end of the first slider being connected to the plate body, the other end of the slide rail being slidably connected to the first slide rail along a first direction, the base comprising two first slide rails arranged opposite to each other, the two plate bodies being arranged in a one-to-one correspondence with the two first slide rails; A first embedding groove is formed on the two plates along a first direction, and the first support arm is embedded in the first embedding groove and connected to the plates; The second embedding groove is formed on the two plates along the second direction, and the second embedding grooves on the two plates are arranged opposite to each other. The second support arm is embedded in the second embedding groove and connected to the plates.

4. The CNC precious metal milling machine according to claim 3, characterized in that: The first support arm comprises: A first arm body is perpendicular to the plate surface of the plate body; A first embedding portion is formed on the first arm body and extends along the third direction, and is embedded in the first embedding groove along the first direction to be connected to the plate body; The third embedding groove is formed on the first arm body along the second direction and is embedded in the second supporting arm and connected to the second supporting arm.

5. The CNC precious metal milling machine according to claim 4, characterized in that: The second support arm comprises: a second arm body, being perpendicular to the plate body and the plate surface of the first arm body respectively; a second embedded portion extending along the third direction and formed on the second arm body, and embedded in the second embedded groove along the third direction and connected to the plate body; The third embedding portion is formed on the second arm body and extends along the first direction, and is embedded in the third embedding groove along the first direction to be connected with the first arm body.

6. The CNC precious metal milling machine according to claim 5, characterized in that: The milling machine further includes a support block provided between the first support rod and the second support rod.

7. The CNC precious metal milling machine according to claim 6, characterized in that: The first support rod includes a first surface which is parallel to the plate surface of the first arm body and extends along the second direction, and the second slide rail is arranged on the first surface.

8. The CNC precious metal milling machine according to claim 7, characterized in that: The second support rod includes a second surface parallel to the plate surface of the plate body and extending along a second direction, and the third slide rail is provided on the second surface.

9. The CNC precious metal milling machine according to claim 1, characterized in that: The milling machine also includes: a motor, disposed on the base; A thread rolling shaft is provided on the base along a first direction and is connected to the output shaft of the motor. The thread rolling bearing is arranged on the support seat and connected to the thread rolling shaft. The torque output by the motor drives the thread rolling shaft to rotate, thereby driving the support seat connected to the thread rolling bearing to slide along the first direction.

10. The CNC precious metal milling machine according to claim 1, characterized in that: The milling machine also includes: a second sliding block, disposed between the second slide rail and the milling head mechanism; The third sliding block is arranged between the third sliding rail and the milling head mechanism.

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