A milling and grinding machine for metal processing and a surface processing method for gold jewelry

Abstract

The present invention relates to the technical field of milling and grinding machines, and discloses a milling and grinding machine for metal processing and a surface processing method for gold jewelry. Through the cooperation of a positioning mechanism, a clamping assembly and an adjusting assembly, when processing a workpiece, the workpiece is placed in an opened clamping assembly, and by rotating a driving rod, a movable frame is driven to move with a positioning plate thereon toward a fixed frame, thereby clamping and fixing the workpiece, so that a surface to be processed on the workpiece faces the milling and grinding assembly, and milling and grinding are performed. After the processing of the processing surface is completed, the adjustment rod and the transmission rod of the adjusting assembly can be cooperated to drive the main push rod and the auxiliary push rod to perform reverse movement in the vertical direction, so that the clamping assembly drives the workpiece to rotate, and the next surface to be processed of the workpiece faces the milling and grinding assembly, thereby reducing the number of clamping times of the workpiece during the processing process, thereby improving the processing progress of the workpiece and ensuring the quality of the product.

Description

Technical Field

[0001] The present invention relates to the technical field of milling and grinding machines, in particular to a milling and grinding machine for metal processing and a surface processing method for gold ornaments. Background Art

[0002] A milling machine is a processing device that combines milling and grinding functions. It can complete multiple processing tasks in a single clamping, significantly improving processing efficiency. Milling machines are used in the production of gold jewelry to process the surface of the jewelry. In order to better demonstrate the designer's creativity and skills and enhance the artistic value of the jewelry, the jewelry is often designed with complex curved surfaces.

[0003] In the existing technology, most milling and grinding machines use pneumatic clamps to contact the two ends of the workpiece to clamp and fix the workpiece so that the surface to be processed of the workpiece faces the processing tool. Due to the design of the complex curved surface, there will be multiple surfaces to be processed on the workpiece. In order to mill and grind these surfaces to be processed, the workpiece needs to be clamped multiple times to adjust the surface to be processed of the workpiece. However, multiple clamping operations will reduce the processing accuracy of the workpiece, thereby affecting the quality of the product. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the present invention provides a milling machine for metal processing and a surface processing method for gold jewelry to overcome the above-mentioned technical problems existing in the existing related technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a metal processing milling machine and a surface processing method for gold jewelry, comprising a main body and a two-dimensional movable platform installed on the main body base, the two-dimensional movable platform is connected to a processing table: the main body is provided with a milling assembly, a positioning mechanism and an adjustment assembly, the milling assembly is installed on the main body for processing the workpiece on the positioning mechanism, the positioning mechanism comprises a fixed plate, a movable frame, a fixed frame and a clamping assembly, the fixed plate is assembled on the processing table, a driving rod is connected to the fixed plate, the movable frame and the fixed frame are sequentially arranged on the fixed plate, and the movable frame is connected to the driving rod, the clamping assembly comprises a positioning plate and a clamping claw, two Material toggling mechanism, its both sides respectively have a cylinder pressure, and the cylinder pressure bar connects swing arm, and the swing arm end face has hook portion, and a bar passes position between the end of two swing arms and the hook portion.

[0006] Preferably, the fixed plate is fixedly installed on the processing table, and guide rails are fixedly connected to both sides of the fixed plate. Fixed seats are fixedly installed at both ends of the fixed plate, and the fixed seats are located between the two guide rails. A slot is opened on the fixed plate, and the slot is between the guide rails and the fixed seat, and is located on the side of the fixed plate close to the milling assembly.

[0007] Preferably, the driving rod is rotatably mounted on the fixed seat, a thread is provided on the driving rod, the movable frame is slidably mounted on the guide rail, and the bottom of the movable frame is fitted on the threaded section of the driving rod through a threaded sleeve, the fixed frame is fixedly mounted on one end of the fixed plate close to the milling assembly, and bearing seats are fixedly mounted on both the fixed frame and the movable frame.

[0008] Preferably, the positioning plate is in a U shape. The two positioning plates are respectively rotatably connected to the bearing seats of the fixed frame and the movable frame through rotating shafts. The positioning plate is provided with a limiting groove and a guiding groove. The guiding grooves are distributed on both sides of the limiting groove. A main connecting rod is fixedly connected to the positioning plate on the movable frame, and a sub-connecting rod is fixedly connected to the other positioning plate. The sub-connecting rod is slidably connected to the main connecting rod, and a supporting plate is fixedly connected to the lower side of the other positioning plate. Two connecting seats are symmetrically and fixedly connected to the bottom of the supporting plate.

[0009] Preferably, a limiting slider is fixedly connected to one side of the clamping jaw facing the limiting groove. The limiting slider is slidably installed in the limiting groove. A guide rod is fixedly connected to one side of the clamping jaw facing the guiding groove. The guide rod is slidably installed in the guiding groove. A supporting spring is sleeved on the guide rod. The two ends of the supporting spring respectively abut against the outer side of the clamping jaw and the side wall of the positioning plate.

[0010] Preferably, the upper ends of the main push rod and the sub-push rod are respectively rotatably connected to one of the connecting seats. The lower ends of the main push rod and the sub-push rod are inserted into the notch. A rack is fixedly connected to one side of the main push rod facing the movable frame and one side of the sub-push rod facing the fixed frame.

[0011] Preferably, the adjusting component further includes a mounting seat. The two mounting seats are symmetrically and fixedly installed on both sides of the fixing plate. The adjusting rod and the transmission rod are sequentially rotatably installed on the mounting seat. Driving gears and driven gears are sequentially and coaxially fixedly connected to the adjusting rod and the transmission rod. The driving gears on the adjusting rod and the transmission rod are respectively meshed with the racks on the main push rod and the sub-push rod. The driven gears on the adjusting rod and the transmission rod are located outside the mounting seat. A transmission gear is rotatably installed on the mounting seat. The two side teeth of the transmission gear are respectively meshed with the two driven gears.

[0012] Preferably, two storage grooves are opened on the processing table. The storage grooves correspond to the notch. The lower ends of the main push rod and the sub-push rod pass through the notch and are stored in the storage grooves. A slide rail is fixedly installed on the main body. A driving motor is fixedly installed on the top of the main body. A screw rod is also rotatably installed on the main body. The screw rod is coaxially and fixedly connected to the output shaft of the driving motor.

[0013] Preferably, the milling assembly includes a mounting frame, which is slidably mounted on the slide rail, and the mounting frame is assembled on the screw rod through a thread on the side facing the main body, and a motor is fixedly mounted on the top of the other side of the mounting frame, and a tool head is rotatably mounted on the mounting frame, the upper end of the tool head is fixedly connected to the output shaft of the motor, and the lower end of the tool head is detachably mounted with a processing tool.

[0014] The present invention also provides a surface processing method for gold ornaments, which uses a metal processing milling machine.

[0015] Compared with the prior art, the present invention provides a metal processing milling machine and a surface processing method for gold jewelry, which have the following beneficial effects:

[0016] 1. The metal processing milling and grinding machine and the surface processing method of gold jewelry, through the cooperation of the positioning mechanism, the clamping assembly and the adjusting assembly, when processing the workpiece, the workpiece is placed in the opened clamping assembly, and by rotating the driving rod, the movable frame is driven to move with the positioning plate thereon toward the fixed frame, thereby clamping and fixing the workpiece, so that a to-be-processed surface on the workpiece faces the milling and grinding assembly for milling and grinding. After the processing of the processing surface is completed, the adjusting rod and the transmission rod of the adjusting assembly can be cooperated to drive the main push rod and the auxiliary push rod to move in the opposite direction in the vertical direction, so that the clamping assembly drives the workpiece to rotate, and the next to-be-processed surface of the workpiece faces the milling and grinding assembly, thereby reducing the number of clamping times of the workpiece during the processing process, thereby improving the processing accuracy of the workpiece and ensuring the quality of the product.

[0017] 2. The metal processing milling and grinding machine and the surface processing method of gold jewelry are characterized by the setting of clamping claws. When the two positioning plates abut against the two ends of the workpiece, the workpiece will open the closed clamping claws, so that the clamping claws are clamped on the outside of the two ends of the workpiece with the cooperation of the guide rod, the limit slider and the support spring, so that the ends and sides of the workpiece are clamped, thereby improving the clamping and fixing ability of the clamping assembly, so that the workpiece can remain stable during processing, thereby further improving the processing accuracy of the milling and grinding machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of the positioning plate of the present invention;

[0020] Figure 3 for Figure 2 A local enlarged structural diagram of point A;

[0021] Figure 4 It is a schematic diagram of the planar structure of the milling and grinding assembly of the present invention;

[0022] Figure 5 It is a schematic diagram of the side structure of the processing table of the present invention;

[0023] Figure 6 It is a side view structural diagram of the positioning mechanism of the present invention;

[0024] Figure 7 for Figure 6 A schematic diagram of the partially enlarged structure at point B;

[0025] Figure 8 Schematic diagram of the positional relationship between the positioning mechanism and the components of the processing platform of the present invention.

[0026] In the figure: 1. Main body; 11. Two-dimensional moving platform; 12. Processing table; 121. Storage slot; 13. Slide rail; 14. Drive motor; 15. Screw; 2. Milling assembly; 21. Mounting frame; 22. Motor; 23. Tool head; 24. Processing tool; 3. Positioning mechanism; 31. Fixing plate; 311. Notch; 32. Guide rail; 33. Fixing seat; 34. Drive rod; 35. Moving frame; 36. Fixing frame; 37. Bearing seat; 4. Clamping assembly; 41. Positioning plate; 411. Limiting groove; 412. Guide groove; 413. Main connecting rod; 414. Auxiliary connecting rod; 415. Support plate; 416. Connecting seat; 42. Clamping claw; 421. Limiting slider; 422. Guide rod; 43. Support spring; 5. Adjustment assembly; 51. Main push rod; 52. Auxiliary push rod; 53. Rack; 54. Mounting seat; 55. Adjustment rod; 56. Transmission rod; 57. Driving gear; 58. Driven gear; 59. Transmission gear. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Example 1

[0029] See also Figures 1-8A metal processing milling machine and a surface processing method for gold jewelry include a main body 1 and a two-dimensional mobile platform 11 installed on the base of the main body 1, a processing table 12 is connected to the two-dimensional mobile platform 11, a milling assembly 2, a positioning mechanism 3 and an adjustment assembly 5 are provided on the main body 1, the milling assembly 2 is installed on the main body 1, and is used to process the workpiece on the positioning mechanism 3, the positioning mechanism 3 includes a fixed plate 31, a mobile frame 35, a fixed frame 36 and a clamping assembly 4, the fixed plate 31 is assembled on the processing table 12, a driving rod 34 is connected to the fixed plate 31, the mobile frame 35 and the fixed frame 36 are sequentially arranged on the fixed plate 31, and the mobile frame 35 is connected to the driving rod 34, the clamping assembly 4 includes a positioning plate 41 and a clamping claw 42, and the two positioning plates 41 are respectively installed On the movable frame 35 and the fixed frame 36, the two positioning plates 41 are connected to each other, and two clamping claws 42 are installed on each positioning plate 41. By rotating the driving rod 34, the movable frame 35 can be driven to move toward the fixed frame 36, so that the clamping assembly 4 clamps the workpiece. The adjusting assembly 5 includes a main push rod 51, an auxiliary push rod 52, an adjusting rod 55 and a transmission rod 56. The main push rod 51 and the auxiliary push rod 52 are respectively connected to the two sides of the bottom of the positioning plate 41 located on the fixed frame 36, and the adjusting rod 55 and the transmission rod 56 are both connected to the fixed plate 31. The adjusting rod 55 and the transmission rod 56 cooperate with the main push rod 51 and the auxiliary push rod 52 respectively. By rotating the adjusting rod 55, the transmission rod 56 is driven to synchronously drive the main push rod 51 and the auxiliary push rod 52, so that the clamping assembly 4 drives the workpiece to rotate.

[0030] When in use, the workpiece to be processed is first placed on the positioning mechanism 3. Initially, the movable frame 35 on the positioning mechanism 3 is away from the fixed frame 36 and is located at the other end of the fixed plate 31. The two positioning plates 41 are open, and the clamping claws 42 on the positioning plate 41 are in a closed state, wherein the clamping claws 42 are inclined toward the side of the workpiece. After the workpiece is placed, the driving rod 34 is rotated in the reverse direction to make the movable frame 35 approach the fixed frame 36. The two sides of the end of the workpiece will contact the inclined surfaces of the clamping claws 42 in the closed state. As the movable frame 35 continues to move The two-dimensional moving platform 11 drives the machining table 12 to move along the two ends of the workpiece, and the two-dimensional moving platform 11 drives the machining table 12 to move along the two ends of the workpiece. The component 2 moves down and cooperates with the milling and grinding component 2 to mill and grind the processing surface of the workpiece. When the processing of the surface of the workpiece is completed, the two-dimensional moving platform 11 and the milling and grinding component 2 stop working. The worker rotates the adjusting rod 55 of the adjusting component 5 to make the adjusting rod 55 drive the transmission rod 56 to rotate. The rotating adjusting rod 55 and the rotating transmission rod 56 synchronously drive the main push rod 51 and the auxiliary push rod 52 to move in the opposite direction, so that the two mounting plates rotate with the clamped workpiece, and the next surface to be processed is facing the milling and grinding component 2. After the adjustment is completed, the two-dimensional moving platform 11 and the milling and grinding component 2 Continue working and process the next processing surface of the workpiece. After completing the processing, rotate the driving rod 34 forward again to drive the movable frame 35 away from the fixed frame 36, so that the positioning plate 41 that abuts against the end of the workpiece is disengaged. When the positioning plate 41 on the movable frame 35 is disengaged from the end of the workpiece, the clamping claws 42 on the positioning plate 41 that clamp on both sides of the workpiece will return to the closed state, and then the workpiece will be taken out from between the two clamping claws 42 of the positioning plate 41 on the fixed frame 36. After the workpiece is taken out, the two clamping claws 42 on the positioning plate 41 also return to the closed state and wait for the next clamping.

[0031] The difference from the above embodiment is that the fixed plate 31 is fixedly installed on the processing table 12, and the guide rails 32 are fixedly connected on both sides of the fixed plate 31. The fixed seats 33 are fixedly installed on both ends of the fixed plate 31, and the fixed seats 33 are located between the two guide rails 32. A slot 311 is opened on the fixed plate 31, and the slot 311 is between the guide rail 32 and the fixed seat 33, and is located on the side of the fixed plate 31 close to the milling assembly 2.

[0032] The difference from the above embodiments is that the driving rod 34 is rotatably installed on the fixed seat 33, a thread is provided on the driving rod 34, the moving frame 35 is slidably installed on the guide rail 32, and the bottom of the moving frame 35 is assembled on the threaded section of the driving rod 34 through a threaded sleeve. The fixed frame 36 is fixedly installed at one end of the fixed plate 31 close to the milling and grinding assembly 2, and bearing seats 37 are fixedly installed on both the fixed frame 36 and the moving frame 35.

[0033] Among them, when it is necessary to clamp the workpiece, the driving rod 34 is rotated in the reverse direction, so that the driving rod 34 drives the moving frame 35 to slide on the guide rail 32 towards the fixed frame 36. After the clamping component 4 clamps and fixes the workpiece, the rotation of the driving rod 34 is stopped. When it is necessary to release the clamping of the workpiece, the driving rod 34 is rotated in the forward direction, so that the driving rod 34 drives the moving frame 35 to move away from the fixed frame 36. After the clamping component releases the clamping and fixing of the workpiece, the rotation of the driving rod 34 is stopped.

[0034] The difference from the above embodiments is that the positioning plate 41 is in a U shape, and the two positioning plates 41 are respectively rotatably connected to the bearing seats 37 of the fixed frame 36 and the moving frame 35 through rotating shafts. A limiting groove 411 and a guiding groove 412 are provided on the positioning plate 41. The guiding grooves 412 are distributed on both sides of the limiting groove 411. A main connecting rod 413 is fixedly connected to the positioning plate 41 on the moving frame 35, and a sub-connecting rod 414 is fixedly connected to the other positioning plate 41. The sub-connecting rod 414 is slidably connected to the main connecting rod 413, and a supporting plate 415 is fixedly connected to the lower side of the other positioning plate 41. Two connecting seats 416 are symmetrically and fixedly connected to the bottom of the supporting plate 415.

[0035] Among them, when placing the workpiece, the workpiece needs to be placed on the supporting plate 415, so that the two ends of the workpiece face the two positioning plates 41 respectively. When the driving rod 34 drives the moving frame 35 to move on the guide rail 32, the main connecting rod 413 will move in the same direction as the moving frame 35 on the sub-connecting rod 414. When the adjusting component 5 drives the clamping component 4 to rotate, the two positioning plates 41 rotate synchronously under the cooperation of the main connecting rod 413 and the sub-connecting rod 414.

[0036] The difference from the above embodiments is that a limiting slider 421 is fixedly connected to the side of the clamping jaw 42 facing the limiting groove 411. The limiting slider 421 is slidably installed in the limiting groove 411. A guide rod 422 is fixedly connected to the side of the clamping jaw 42 facing the guiding groove 412. The guide rod 422 is slidably installed in the guiding groove 412. A supporting spring 43 is sleeved on the guide rod 422. The two ends of the supporting spring 43 respectively abut against the outer side of the clamping jaw 42 and the side wall of the positioning plate 41.

[0037] Among them, when the two positioning plates 41 respectively contact the two ends of the workpiece, the workpiece will be inserted into the clamping claw 42 in the closed state, and the clamping claw 42 moves toward the outside of the positioning plate 41 through the cooperation of the limiting slider 421 and the limiting slide groove. At the same time, the clamping claw 42 pushes the guide rod 422 into the guide groove 412 and compresses the support spring 43, thereby opening the closed clamping claw 42. At the same time, the compressed support spring 43 is deformed to restore the deformation, thereby pushing the clamping claw 42 to clamp on the outside of the workpiece. When the movable frame 35 carries one of the positioning plates 41 away from the fixed frame 36, the positioning plate 41 releases the restraint on the workpiece. As the workpiece detaches from the clamping claw 42, the support spring 43 that restores the deformation will push the clamping claw 42 to close again and pull the guide rod 422 out of the guide groove 412.

[0038] The difference from the above embodiment is that the upper ends of the main push rod 51 and the auxiliary push rod 52 are respectively rotatably connected to a connecting seat 416, the lower ends of the main push rod 51 and the auxiliary push rod 52 are inserted into the slot 311, and a rack 53 is fixedly connected to the side of the main push rod 51 facing the movable frame 35 and the side of the auxiliary push rod 52 facing the fixed frame 36.

[0039] The difference from the above embodiment is that the adjustment assembly 5 also includes a mounting seat 54, and the two mounting seats 54 are symmetrically fixed on both sides of the fixed plate 31. The adjusting rod 55 and the transmission rod 56 are rotatably mounted on the mounting seat 54 in turn, and the adjusting rod 55 and the transmission rod 56 are coaxially fixedly connected with a driving gear 57 and a driven gear 58 in turn. The driving gear 57 on the adjusting rod 55 and the transmission rod 56 are respectively engaged with the racks 53 on the main push rod 51 and the auxiliary push rod 52, and the driven gear 58 on the adjusting rod 55 and the transmission rod 56 is located on the outside of the mounting seat 54, and a transmission gear 59 is rotatably mounted on the mounting seat 54, and the gear teeth on both sides of the transmission gear 59 are respectively engaged with the two driven gears 58.

[0040] Among them, at the beginning, the tops of the main push rod 51 and the auxiliary push rod 52 are flush, so that the clamping assembly 4 is kept horizontal with the workbench. When adjustment is needed, the adjusting rod 55 is rotated in the opposite direction to drive the main push rod 51 downward through the driving gear 57. At the same time, the rotating adjusting rod 55 drives the transmission gear 59 to rotate forward through the driven gear 58 thereon, so that the driven gear 58 on the other side of the transmission gear 59 drives the transmission rod 56 to rotate in the opposite direction, so that the transmission rod 56 drives the auxiliary push rod 52 upward through the driving gear 57 thereon, so that the support plate 415 drives the positioning plate 41 installed on the fixed frame 36 to rotate, and at the same time, the positioning plate 41 on the fixed frame 36 drives the other positioning plate 41 in the same direction through the cooperation of the auxiliary connecting rod 414 and the main connecting rod 413. Rotate, thereby causing the clamping assembly 4 to rotate toward one side of the main body 1, or by rotating the adjusting rod 55 forward, the adjusting rod 55 drives the main push rod 51 to move upward through the driving gear 57, and at the same time, the rotating adjusting rod 55 drives the transmission gear 59 to rotate in the opposite direction through the driven gear 58 thereon, so that the driven gear 58 on the other side of the transmission gear 59 drives the transmission rod 56 to rotate forward, thereby allowing the transmission rod 56 to drive the secondary push rod 52 downward through the driving gear 57 thereon, so that the support plate 415 drives the positioning plate 41 installed on the fixed frame 36 to rotate, and at the same time, the positioning plate 41 on the fixed frame 36 drives the other positioning plate 41 to rotate in the same direction through the cooperation of the secondary connecting rod 414 and the main connecting rod 413, thereby causing the clamping assembly 4 to rotate toward the other side of the main body 1.

[0041] The difference from the above embodiment is that two receiving grooves 121 are provided on the processing table 12, and the receiving grooves 121 correspond to the grooves 311. The lower ends of the main push rod 51 and the auxiliary push rod 52 pass through the grooves 311 and are received in the receiving grooves 121. A slide rail 13 is fixedly mounted on the main body 1, and a drive motor 14 is fixedly mounted on the top of the main body 1. A screw rod 15 is also rotatably mounted on the main body 1, and the screw rod 15 is coaxially fixedly connected to the output shaft of the drive motor 14.

[0042] When the main push rod 51 and the auxiliary push rod 52 move up and down, they will be retracted into or extended from the receiving groove 121 through the notch 311. During the processing, the driving motor 14 can drive the screw rod 15 to rotate forward and reverse.

[0043] Example 2

[0044] The difference from the above embodiment is that the milling and grinding assembly 2 includes a mounting frame 21, which is slidably mounted on the slide rail 13, and the side of the mounting frame 21 facing the main body 1 is assembled on the screw rod 15 through a thread, and a motor 22 is fixedly mounted on the top of the other side of the mounting frame 21, and a tool head 23 is rotatably mounted on the mounting frame 21, the upper end of the tool head 23 is fixedly connected to the output shaft of the motor 22, and the lower end of the tool head 23 is detachably mounted with a processing tool 24.

[0045] Among them, when the screw rod 15 rotates in the opposite direction, it will drive the mounting frame 21 to move toward the lower end of the slide rail 13, so that the processing tool 24 can process the workpiece on the positioning mechanism 3. The processing tool 24 installed on the tool head 23 is a milling cutter or a grinding head. When the milling cutter is installed on the tool head 23, the milling and grinding assembly 2 drives the milling cutter on the tool head 23 to rotate through the motor 22 to perform milling processing on the workpiece. After the milling processing is completed, the milling cutter is removed from the tool head 23, and the grinding head is replaced on the tool head 23, so that the tool head 23 is driven by the motor 22 to drive the grinding head to rotate and grind the surface of the workpiece after milling.

[0046] The invention also provides a surface processing method for gold ornaments, which uses a metal processing milling machine.

[0047] Working principle: When in use, first place the workpiece to be processed on the positioning mechanism 3. Initially, the movable frame 35 on the positioning mechanism 3 is away from the fixed frame 36 and is located at the other end of the fixed plate 31. The two positioning plates 41 are open, and the clamping claws 42 on the positioning plate 41 are in a closed state, wherein the clamping claws 42 are inclined toward the side of the workpiece. After the workpiece is placed, the driving rod 34 is rotated in the opposite direction to make the movable frame 35 approach the fixed frame 36. The two sides of the end of the workpiece will contact the inclined surface of the clamping claws 42 in the closed state. As the movable frame 35 continues to move, the workpiece is moved to the fixed frame 36. The workpiece moves, and the positioning plate 41 on the movable frame 35 pushes the workpiece to move toward the fixed frame 36. During this process, the workpiece moves along the inclined surface of the clamping claw 42 toward the inside of the clamping claw 42 in the closed state, thereby opening the closed clamping claw 42. Finally, the two ends of the workpiece respectively contact the two positioning plates 41. At the same time, the clamping claws 42 on the two positioning plates 41 are respectively clamped on the outside of the two ends of the workpiece, thereby clamping the workpiece on the processing table 12, so that one of the workpiece to be processed faces the milling assembly 2. Then, the two-dimensional movable platform 11 drives the processing table 12 on the milling machine under the drive of the motor. The grinding assembly 2 moves down and cooperates with the milling and grinding assembly 2 to mill and grind the processing surface of the workpiece. When the processing of the surface of the workpiece is completed, the two-dimensional moving platform 11 and the milling and grinding assembly 2 stop working. The worker rotates the adjusting rod 55 of the adjusting assembly 5 to make the adjusting rod 55 drive the transmission rod 56 to rotate. The rotating adjusting rod 55 and the rotating transmission rod 56 synchronously drive the main push rod 51 and the auxiliary push rod 52 to move in the opposite direction, so that the two mounting plates rotate with the clamped workpiece, and the next surface to be processed is facing the milling and grinding assembly 2. After the adjustment is completed, the two-dimensional moving platform 11 and the milling and grinding assembly 2 stop working. Part 2 continues to work and processes the next processing surface of the workpiece. After completing the processing, the driving rod 34 is rotated forward to drive the movable frame 35 away from the fixed frame 36, so that the positioning plate 41 that is in contact with the end of the workpiece is disengaged. When the positioning plate 41 on the movable frame 35 is disengaged from the end of the workpiece, the clamping claws 42 on the positioning plate 41 that are clamped on both sides of the workpiece will return to the closed state, and then the workpiece is taken out from between the two clamping claws 42 of the positioning plate 41 on the fixed frame 36. After the workpiece is taken out, the two clamping claws 42 on the positioning plate 41 also return to the closed state, waiting for the next clamping.

[0048] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A milling machine for metal processing, comprising a main body and a two-dimensional movable platform mounted on a base of the main body, wherein a processing table is connected to the two-dimensional movable platform, characterized in that: The main body is provided with a milling assembly, a positioning mechanism and an adjustment assembly, the milling assembly is mounted on the main body and is used to process the workpiece on the positioning mechanism, the positioning mechanism includes a fixed plate, a movable frame, a fixed frame and a clamping assembly, the fixed plate is mounted on the processing table, a driving rod is connected to the fixed plate, the movable frame and the fixed frame are sequentially arranged on the fixed plate, and the movable frame is connected to the driving rod, the clamping assembly includes a positioning plate and a clamping claw, two positioning plates are respectively mounted on the movable frame and the fixed frame, and the two positioning plates are connected to each other, each positioning plate The adjusting rod and the secondary push rod are respectively connected to the two sides of the bottom of the positioning plate on the fixed frame, and the adjusting rod and the transmission rod are respectively matched with the main push rod and the secondary push rod, and the transmission rod is driven by the rotating shaft of the adjusting rod to synchronously drive the main push rod and the secondary push rod, so that the clamping assembly drives the workpiece to rotate; The fixed plate is provided with a slot, and the fixed frame and the movable frame are both fixedly mounted with bearing seats, and the two positioning plates are rotatably connected to the bearing seats of the fixed frame and the movable frame respectively through rotating shafts, and a supporting plate is fixedly connected to the lower side of the positioning plate, and two connecting seats are symmetrically fixedly connected to the bottom of the supporting plate; The upper ends of the main push rod and the auxiliary push rod are respectively rotatably connected to one of the connecting seats, and the lower ends of the main push rod and the auxiliary push rod are inserted into the slots. A rack is fixedly connected to the side of the main push rod facing the movable frame and the side of the auxiliary push rod facing the fixed frame. The adjusting assembly also includes a mounting seat, the two mounting seats are symmetrically fixedly mounted on both sides of the fixing plate, the adjusting rod and the transmission rod are rotatably mounted on the mounting seat in turn, the adjusting rod and the transmission rod are coaxially fixedly connected with a driving gear and a driven gear in turn, the driving gears on the adjusting rod and the transmission rod are respectively meshed with the racks on the main push rod and the auxiliary push rod, the driven gear on the adjusting rod and the transmission rod is located on the outside of the mounting seat, and a transmission gear is rotatably mounted on the mounting seat, and the gear teeth on both sides of the transmission gear are respectively meshed with the two driven gears.

2. A metal processing milling machine according to claim 1, characterized in that: The fixed plate is fixedly installed on the processing table, and guide rails are fixedly connected to both sides of the fixed plate. Fixed seats are fixedly installed at both ends of the fixed plate, and the fixed seats are located between the two guide rails. The notch is between the guide rails and the fixed seats and is located on the side of the fixed plate close to the milling assembly.

3. A metal processing milling machine according to claim 2, characterized in that: The driving rod is rotatably mounted on the fixed seat. Threads are provided on the driving rod. The moving frame is slidably mounted on the guide rail, and the bottom of the moving frame is assembled on the threaded section of the driving rod through a threaded sleeve. The fixed frame is fixedly mounted on one end of the fixed plate close to the milling and grinding assembly.

4. A metal processing milling machine according to claim 3, characterized in that: The positioning plate is in a U shape. A limiting groove and a guiding groove are provided on the positioning plate. The guiding grooves are distributed on both sides of the limiting groove. A main connecting rod is fixedly connected to the positioning plate on the moving frame, and a sub-connecting rod is fixedly connected to the other positioning plate. The sub-connecting rod is slidably connected to the main connecting rod.

5. The metal processing milling machine according to claim 4, characterized in that: A limiting slider is fixedly connected to one side of the clamping jaw facing the limiting groove. The limiting slider is slidably mounted in the limiting groove. A guide rod is fixedly connected to one side of the clamping jaw facing the guiding groove. The guide rod is slidably mounted in the guiding groove. A support spring is sleeved on the guide rod, and two ends of the support spring respectively abut against the outside of the clamping jaw and the side wall of the positioning plate.

6. The metal processing milling machine according to claim 1, characterized in that: Two receiving grooves are provided on the processing table. The receiving grooves correspond to the slot openings. The lower ends of the main push rod and the sub-push rod pass through the slot openings and are received in the receiving grooves. A slide rail is fixedly mounted on the main body. A driving motor is fixedly mounted on the top of the main body. A lead screw is also rotatably mounted on the main body. The lead screw is coaxially and fixedly connected to the output shaft of the driving motor.

7. The metal processing milling machine according to claim 6, characterized in that: The milling and grinding assembly includes a mounting frame. The mounting frame is slidably mounted on the slide rail, and one side of the mounting frame facing the main body is assembled on the lead screw through threads. A motor is fixedly mounted on the top of the other side of the mounting frame. A tool head is rotatably mounted on the mounting frame. The upper end of the tool head is fixedly connected to the output shaft of the motor. A processing tool is detachably mounted at the lower end of the tool head.

8. A surface processing method for gold jewelry, characterized by: A milling and grinding machine tool for metal processing as described in any one of claims 1-7 is used.

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