Composite processing method for gold ornaments

Abstract

The invention discloses a composite processing method for gold ornaments, which relates to the field of precious metal precision processing, and comprises the following steps: (a) preparing a gold matrix with an internal cavity by means of mold casting, and controlling the wall thickness to be 0.3-0.8 mm to form a carrier structure; (b) performing multi-temperature-section dynamic forging and pressing on the carrier structure through a four-column hydraulic press; (c) forming a local enhancement layer in the stress concentration area by using a laser cladding device; (d) machining by a CNC (Computer Numerical Control) machining machine tool; the forging, CNC and casting processes are combined, the gold weight is reduced by 52% through the material reduction design of the hollow carrier, a forging-casting mechanical property compensation mechanism is combined, the final product has the ultra-3 mm deep relief effect and the lightweight index of smaller than or equal to 15 g / piece, the process comprehensive cost is reduced by 39% compared with that of a traditional precision technology, and the product quality is improved. The gold weight range of the gold material is reduced while the three-dimensional effect of the gold high relief is improved, the cost is controlled, and the balance of the gold ornament on the aspects of artistic ornamental value and raw material cost control is realized.

Description

Technical Field

[0001] The present invention relates to the technical field related to the precision processing of precious metals, and specifically to a composite processing method for gold ornaments. Background Art

[0002] At present, in order to meet market demands such as the aestheticization of young consumer demands, the high integration of process technologies, the reconstruction of cultural values, and the expansion of functional scenarios of ornaments, the processing technology of gold ornaments needs to achieve a composite process form of pure manual and mechanical processing, multiple materials, and multiple process forms.

[0003] However, the existing processing technologies still have the following deficiencies:

[0004] First, forging process: Single forging is difficult to achieve a three-dimensional relief with a depth exceeding 2 mm, and the dense solid structure results in an overweight of the gold weight.

[0005] Second, casting process: The free shaping ability is limited, and uneven wall thickness leads to local stress concentration (rejection rate > 30%).

[0006] Third, CNC machining: The full-piece numerical control cost reaches 85% of the raw material gold price, and mass production cannot be achieved economically. Summary of the Invention

[0007] To solve the defects existing in the prior art, the present invention provides a composite processing method for gold ornaments.

[0008] To solve the above technical problems, the present invention provides the following technical solutions:

[0009] A composite processing method for gold ornaments according to the present invention includes the following steps:

[0010] (a) Prepare a gold matrix with an internal cavity by means of die casting, and control the wall thickness within the range of 0.3 - 0.8 mm to form a carrier structure;

[0011] (b) Implement multi-temperature-section dynamic forging on the carrier structure by a four-column hydraulic press, and apply forming stress in at least three stages within the temperature range of 180 - 250 °C;

[0012] (c) Use a laser cladding device to form a local strengthening layer in the stress concentration area;

[0013] (d) Process by a CNC machining tool to form micron-level texture lines on the relief surface, and at the same time correct the assembly and fitting dimensions.

[0014] As a preferred technical solution of the present invention, in step (b), a split die system is adopted, and the split die system includes a female die and a male die, and the temperature difference between the female die and the male die is maintained within the range of 50 °C - 80 °C.

[0015] As a preferred technical solution of the present invention, during the processing of the CNC machine tool, adaptive tool yaw compensation is adopted, and the dynamic adjustment amount Δ = K×tanθ, where K is the material deformation coefficient and θ is the surface normal angle.

[0016] As a preferred technical solution of the present invention, support platforms are provided on both sides of the four-column hydraulic press. A control unit is provided on the top of the support platform. The control unit includes an adjustment cylinder installed on one of the support platforms, a bearing seat installed at the piston end of the adjustment cylinder, and two symmetrically distributed control pipes. A cavity is provided inside the bearing seat. Matching holes communicating with the cavity are opened at the top and bottom of the bearing seat. A threaded blind hole for installing the female mold is also provided on the top of the bearing seat. Sliding holes communicating with the cavity are symmetrically provided at both ends of the bearing seat.

[0017] As a preferred technical solution of the present invention, the control pipe is arranged on the top of the support platform through a mounting member. The control pipe is in sliding fit with the sliding hole. A plurality of ventilation holes are opened on the control pipe. One end of one of the control pipes is connected to an exhaust fan through a pipeline, and one end of the other control pipe is connected to an air filter through a pipeline.

[0018] As a preferred technical solution of the present invention, the four-column hydraulic press includes a machine body and a hydraulic cylinder installed on the machine body. The machine body includes a base. An opening is provided at the top of the base. The piston end of the hydraulic cylinder is installed with a moving platen, and the male mold is installed at the bottom of the moving platen.

[0019] As a preferred technical solution of the present invention, a heating unit is provided inside the base. The heating unit includes a lifting cylinder installed inside the base and a heat insulation seat installed at the piston end of the lifting cylinder. A heating plate is embedded on the top of the heat insulation seat. The heat insulation seat is in sliding fit with the opening and the matching hole.

[0020] As a preferred technical solution of the present invention, the female mold is installed on the top of the bearing seat. A receiving groove in sliding fit with the heat insulation seat is provided at the bottom of the female mold. A plurality of forming cavities communicating with the receiving groove through communication holes are provided at the top of the female mold. A thimble is slidably arranged in the communication hole. A stop block is installed at the bottom of the thimble. A return spring connecting the female mold and the stop block is sleeved outside the thimble.

[0021] As a preferred technical solution of the present invention, a transfer device is arranged between the laser cladding device and the CNC machine tool. The transfer device includes a conveying module. A manipulator is arranged on the top of the moving body of the conveying module. A fixture is installed at the moving end of the manipulator.

[0022] As a preferred technical solution of the present invention, an annealing device is provided on one side of the CNC processing machine, and the annealing device includes a support seat installed on the top of another support platform and a lifting module arranged between the CNC processing machine and the other support platform, and a heat preservation cover is installed on the moving body of the lifting module, a temperature regulating module is installed in the heat preservation cover, and the mold is installed on the top of the support seat.

[0023] The beneficial effects of the present invention are:

[0024] 1. This composite processing method for gold jewelry combines the three processes of forging, CNC and casting. Through the material reduction design of the hollow carrier, the gold weight is reduced by 52%. Combined with the mechanical performance compensation mechanism of forging-casting, the final product has both a deep relief effect of more than 3mm and a lightweight index of ≤15g / piece. The comprehensive process cost is 39% lower than that of traditional precision techniques. While improving the three-dimensional effect of gold high relief, the gold weight range of gold materials is reduced, the cost is controlled, and the balance between the artistic appreciation value and raw material cost control of gold jewelry is achieved.

[0025] 2. In this composite processing method for gold jewelry, the hot air in the bearing seat is discharged from the ventilation holes on the control tube connected to the exhaust fan by the exhaust fan, and the cold air is filtered by the air filter and enters from the ventilation holes on another control tube, thereby increasing the cooling speed and reducing the time consumed in the forging stage.

[0026] 3. This composite processing method for gold jewelry heats the die through a heating plate. When used in conjunction with a control unit, the temperature of the die can be maintained within a certain range. The heating plate is not in direct contact with the die, and the heating is performed in an air-through heating manner, which can effectively avoid local overheating of the die and make the quality of the forging more stable and reliable.

[0027] 4. This composite processing method for gold jewelry pushes the ejector pin upwards through the heating unit, and the ejector pin pushes the carrier structure upwards for subsequent demolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0029] Figure 1 It is a structural schematic diagram of a composite processing method for gold ornaments of the present invention;

[0030] Figure 2 It is a structural schematic diagram of a gold jewelry composite processing method of the present invention, in which a concave die, a convex die and a heat-insulating seat are in an aligned state from a first perspective;

[0031] Figure 3It is a second - perspective structural schematic diagram of the female die, male die, and heat - insulation seat of a composite processing method for gold jewelry of the present invention in an aligned state;

[0032] Figure 4 It is a third - perspective structural schematic diagram of the female die, male die, and heat - insulation seat of a composite processing method for gold jewelry of the present invention in an aligned state;

[0033] Figure 5 It is a front - view structural schematic diagram of the female die of a composite processing method for gold jewelry of the present invention;

[0034] Figure 6 It is a back - view structural schematic diagram of the female die of a composite processing method for gold jewelry of the present invention;

[0035] Figure 7 It is a structural schematic diagram of the heating unit of a composite processing method for gold jewelry of the present invention;

[0036] Figure 8 It is a structural schematic diagram of the alignment of the heating unit and the carrier seat of a composite processing method for gold jewelry of the present invention;

[0037] Figure 9 It is a structural schematic diagram of the carrier seat of a composite processing method for gold jewelry of the present invention;

[0038] Figure 10 It is a structural schematic diagram of the regulation tube of a composite processing method for gold jewelry of the present invention.

[0039] In the figure: 1. Machine body; 11. Moving pressure plate; 2. Support table; 3. Transfer device; 31. Manipulator; 32. Fixture; 33. Conveyor module; 4. Annealing device; 41. Lifting module; 42. Heat - preservation cover; 43. Support seat; 5. Frame; 51. Engraving knife; 6. Support bracket; 61. Laser cladding head; 7. Regulation unit; 71. Carrier seat; 711. Threaded blind hole; 712. Sliding hole; 713. Fitting hole; 72. Adjusting cylinder; 73. Mounting part; 74. Exhaust fan; 75. Regulation tube; 751. Ventilation hole; 76. Air filter; 8. Female die; 81. Forming cavity; 82. Thimble; 83. Return spring; 84. Stop block; 85. Accommodating groove; 9. Male die; 10. Heating unit; 101. Heat - insulation seat; 102. Lifting cylinder; 103. Heating plate. Detailed implementation manners

[0040] The following is a description of the preferred embodiments of the present invention with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not used to limit the present invention.

[0041] Embodiment: As Figures 1-4 shown, a composite processing method for gold jewelry of the present invention includes the following steps:

[0042] (a) Prepare a gold matrix with an internal cavity by die casting, with the wall thickness controlled within 0.3 - 0.8 mm to form a carrier structure; the gold weight is reduced by 40 - 60%;

[0043] (b) Perform multi-temperature dynamic forging on the carrier structure by a four-column hydraulic press, applying forming stress in at least three levels in the range of 180 - 250 °C; perform dynamic die pressing and relief forming, with multi-stage gradient forging (temperature decreasing from 220 °C to 80 °C, pressure step loading from 0.6 → 1.8 GPa), to form a relief depth of 0.5 - 3 mm;

[0044] (c) Use a laser cladding device to form a local strengthening layer in the stress concentration area; directionally cast Au-based composite powder (particle size 5 - 15 μm) in the high-stress area to enhance the load-bearing structure;

[0045] (d) Machine by a CNC machine tool to form micron-level texture lines on the relief surface, and at the same time correct the assembly and mating dimensions; perform CNC parametric trimming, and the tool compensation algorithm automatically corrects the dimensional tolerance (compensation amount δ = 0.02×e^{-t / 15}, t is the machining time); use a nano-crystalline diamond-coated tool head to machine the texture (spindle speed ≥ 24,000 rpm).

[0046] Among them, the CNC machine tool is a 5-axis linkage machining center. The CNC machine tool includes a frame 5, a machining mechanism installed in the frame 5, and a clamping mechanism I for fixing the gold jewelry. A carving tool 51 is installed at the moving end of the machining mechanism. The carving tool 51 is used to carve the gold jewelry. After the laser cladding is completed, the manipulator 31 controls the fixture 32 to transfer the carrier structure to the clamping mechanism I for clamping, and then the machining mechanism drives the carving tool 51 to perform carving.

[0047] Among them, the laser cladding device includes a support bracket 6, a driving mechanism installed on the support bracket 6, and a clamping mechanism II for fixing the gold jewelry. A laser cladding head 61 is installed at the moving end of the driving mechanism for performing laser cladding.

[0048] Among them, as Figures 2-4 shown, in step (b), a split die system is adopted. The split die system includes a female die 8 and a male die 9, and the temperature difference between the female die 8 and the male die 9 is maintained in the range of 50 °C - 80 °C.

[0049] Among them, when the CNC machine tool is machining, it adopts adaptive tool yaw compensation, and the dynamic adjustment amount Δ = K×tanθ, where K is the material deformation coefficient and θ is the surface normal angle.

[0050] Taking the production of a cloud-patterned hollow pendant as an example:

[0051] 1. Casting stage:

[0052] (1) Prepare a hollow blank with a wall thickness of 0.5 mm (a 1.2 mm diameter assembly hole is reserved inside) using the plaster mold casting method

[0053] (2) Raw material utilization rate: 92% (68% for traditional processes)

[0054] 2. Forging stage:

[0055] (1) Perform three-way forging using a four-column hydraulic press:

[0056] First pre-forging (0.4 GPa, 240 °C)

[0057] Main deformation forging (1.2 GPa, 170 °C)

[0058] Finishing forging (0.8 GPa, 90 °C)

[0059] (2) The relief depth reaches 2.8 mm

[0060] 3. CNC trimming:

[0061] (1) Perform moiré engraving using a 5-axis simultaneous machining center:

[0062] Tool: A flat-bottomed pointed tool with a diameter of 0.3 mm

[0063] Cutting parameters: F = 150 mm / min, ap = 0.05 mm

[0064] (2) The surface roughness Ra ≤ 0.8 μm

[0065] Among them, as Figure 1 、 Figure 2 and Figure 4 shown, support platforms 2 are provided on both sides of the four-column hydraulic press, a regulation unit 7 is provided on the top of the support platform 2, the regulation unit 7 includes an adjustment cylinder 72 installed on one of the support platforms 2, a bearing seat 71 installed at the piston end of the adjustment cylinder 72, and two symmetrically distributed regulation pipes 75. A cavity is provided inside the bearing seat 71, matching holes 713 communicating with the cavity are provided at the top and bottom of the bearing seat 71, a threaded blind hole 711 for installing a female die 8 is further provided at the top of the bearing seat 71, and sliding holes 712 communicating with the cavity are symmetrically provided at both ends of the bearing seat 71. The bearing seat 71 is driven by the adjustment cylinder 72 to move the female die 8 on the bearing seat 71 between the male die 9 and the heating unit 10, so that the female die 8, the male die 9, and the heat insulation seat 101 are aligned.

[0066] Among them, as Figure 1 、 Figure 2 and Figure 10As shown in the figure, the regulation pipe 75 is arranged on the top of the support table 2 through the mounting part 73. The regulation pipe 75 is in sliding fit with the sliding hole 712. A plurality of ventilation holes 751 are formed in the regulation pipe 75. One end of one regulation pipe 75 is connected with an exhaust fan 74 through a pipeline, and one end of the other regulation pipe 75 is connected with an air filter 76 through a pipeline. After the exhaust fan 74 is started, the hot air in the bearing seat 71 is discharged from the ventilation holes 751 on the regulation pipe 75 connected with the exhaust fan 74. After the cold air is filtered by the air filter 76, it enters from the ventilation holes 751 on the other regulation pipe 75, so as to improve the cooling speed and reduce the time consumed in the forging stage.

[0067] It should be noted that the regulation unit 7 also needs a temperature sensor capable of detecting temperature to facilitate temperature control. The temperature sensor can be arranged in the bearing seat 71 or on the side of the female die 8. The model, installation method and installation position of the temperature sensor are not limited here, so it is not marked in the drawings.

[0068] Among them, as Figure 3 shown, the four-column hydraulic press includes a machine body 1 and a hydraulic cylinder installed on the machine body 1. The machine body 1 includes a base. An opening is formed at the top of the base. The piston end of the hydraulic cylinder is installed with a moving platen 11, and the male die 9 is installed at the bottom of the moving platen 11. By driving the moving platen 11 through the hydraulic cylinder, the moving platen 11 will drive the male die 9 to move downwards to perform multi-temperature-section dynamic forging on the carrier structure.

[0069] Among them, as Figure 1 and Figure 7 shown, a heating unit 10 is arranged in the base. The heating unit 10 includes a lifting cylinder 102 installed in the base and a heat insulation seat 101 installed at the piston end of the lifting cylinder 102. A heating plate 103 is embedded at the top of the heat insulation seat 101. The heat insulation seat 101 is in sliding fit with the opening and the matching hole 713. The female die 8 is heated by the heating plate 103. When used in cooperation with the regulation unit 7, the temperature of the female die 8 can be maintained within a certain range, and the heating plate 103 is not in direct contact with the female die 8. The heating is carried out by an air separation heating method, which can effectively avoid the situation of local overheating of the female die 8 and make the quality of the forging more stable and reliable.

[0070] Among them, as Figure 2 、 Figure 5 and Figure 6As shown in the figure, the female die 8 is installed on the top of the bearing seat 71. An accommodation groove 85 that is slidably mated with the heat insulation seat 101 is provided at the bottom of the female die 8. A number of forming cavities 81 that are communicated with the accommodation groove 85 through communication holes are provided at the top of the female die 8. A thimble 82 is slidably arranged in the communication hole. A stop block 84 is installed at the bottom of the thimble 82. A return spring 83 that is connected to the female die 8 and the stop block 84 is sleeved outside the thimble 82. The provided accommodation groove 85 is used to place the carrier structure; the return spring 83 not only plays a reset role but also is used to support the thimble 82.

[0071] After the heating plate 103 stops heating and the forging is completed, the lifting cylinder 102 drives the heat insulation seat 101 to move upward. The stop block 84 is pushed upward by the heating plate 103. The return spring 83 is compressed by the stop block 84. At the same time, the stop block 84 drives the thimble 82 to move upward. The carrier structure is pushed upward by the thimble 82 for subsequent demolding. After the lifting cylinder 102 drives the heat insulation seat 101 to move downward, the thimble 82 is reset under the drive of the elastic force of the return spring 83.

[0072] Among them, as Figures 1-4 shown in the figure, a transfer device 3 is provided between the laser cladding device and the CNC machining machine tool. The transfer device 3 includes a conveying module 33. A manipulator 31 is arranged on the top of the moving body of the conveying module 33. A fixture 32 is installed at the moving end of the manipulator 31. The fixture 32 can be a vacuum adsorption fixture or a clamping fixture. The carrier structure is clamped out of the forming cavity 81 by controlling the fixture 32 through the manipulator 31. Then the conveying module 33 transports the carrier structure to the laser cladding area. After the manipulator 31 clamps the carrier structure onto the second clamping mechanism, the driving mechanism controls the laser cladding head 61 to directionally cast the Au-based composite powder in the high-stress area to enhance the load-bearing structure.

[0073] Among them, as Figure 1 shown in the figure, an annealing device 4 is provided on one side of the CNC machining machine tool. The annealing device 4 includes a support seat 43 installed on the top of another support table 2 and a lifting module 41 arranged between the CNC machining machine tool and the another support table 2. A heat preservation cover 42 is installed on the moving body of the lifting module 41. A temperature adjustment module is installed in the heat preservation cover 42. And the die is installed on the top of the support seat 43. The heat preservation cover 42 is driven by the lifting module 41 to move downward to cover the die. The temperature is adjusted through the temperature adjustment module to enter the annealing stage.

[0074] During operation, the gold is heated to a molten state and poured into a mold. After cooling and forming, a carrier structure with an internal cavity is formed. Then, the lifting module 41 drives the heat preservation cover 42 to cover the mold, and the temperature is adjusted through the temperature adjustment module to enter the annealing stage. Some time before the annealing is completed, the heating plate 103 is turned on to heat the female mold 8 (the heating temperature is not lower than the temperature of the first forging). After the annealing is completed, the adjusting cylinder 72 drives the bearing seat 71 to approach the support seat 43, and the carrier structure is taken out and placed into the forming cavity 81 of the female mold 8 (the temperature of the carrier structure is also not lower than the temperature of the first forging). Then, the adjusting cylinder 72 drives the bearing seat 71 to reset, aligning the female mold 8, the male mold 9, and the heat insulation seat 101. Then, the moving pressure plate 11 is driven by the hydraulic cylinder, and the moving pressure plate 11 drives the male mold 9 to move downward to perform multi-temperature-section dynamic forging on the carrier structure. During the forging process, with the aid of the control unit 7, the cooling rate can be increased, reducing the time consumed in the forging stage. After the forging is completed, the lifting cylinder 102 drives the heat insulation seat 101 to move upward, pushing the stopper 84 upward through the heating plate 103. The stopper 84 squeezes the return spring 83, and at the same time, the stopper 84 drives the ejector pin 82 to move upward, pushing the carrier structure upward through the ejector pin 82 for subsequent demolding. After the ejector pin 82 resets, the adjusting cylinder 72 drives the bearing seat 71 to leave the forging area, and the carrier structure is transported to the laser cladding area through the transfer device 3. The high-stress area is directionally cast with Au-based composite powder through the laser cladding device to enhance the load-bearing structure. After the laser cladding is completed, the transfer device 3 transfers the carrier structure to the CNC machining area, and it is engraved by the CNC machining machine tool.

[0075] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A composite processing method for gold jewelry, characterized in that: The following steps are involved: (a) preparing a gold matrix with an internal cavity by means of mold casting, with the wall thickness controlled at 0.3-0.8 mm to form a carrier structure; (b) performing multi-temperature-stage dynamic forging on the carrier structure by a four-column hydraulic press, and applying forming stress in at least three stages in the range of 180-250° C.; (c) using a laser cladding device to form a local reinforcement layer in the stress concentration area; (d) The CNC machine tool is used to process the relief surface to form micron-level texture lines and correct the assembly dimensions.

2. A gold jewelry composite processing method according to claim 1, characterized in that: In step (b), a split mold system is used, wherein the split mold system comprises a concave mold (8) and a convex mold (9), and the temperature difference between the concave mold (8) and the convex mold (9) is maintained in the range of 50°C-80°C.

3. A gold jewelry composite processing method according to claim 1, characterized in that: The CNC machine tool adopts adaptive tool runout compensation during machining, and the dynamic adjustment amount Δ=K×tanθ, wherein K is the material deformation coefficient and θ is the surface normal angle.

4. A gold jewelry composite processing method according to claim 2, characterized in that: Support platforms (2) are provided on both sides of the four-column hydraulic press. A control unit (7) is provided on the top of the support platform (2). The control unit (7) comprises a control cylinder (72) installed on one of the support platforms (2), a bearing seat (71) installed on the piston end of the control cylinder (72), and two symmetrically distributed control pipes (75). A cavity is provided in the bearing seat (71). Matching holes (713) communicating with the cavity are provided on the top and bottom of the bearing seat (71). A threaded blind hole (711) for installing a die (8) is also provided on the top of the bearing seat (71). Sliding holes (712) communicating with the cavity are symmetrically provided at both ends of the bearing seat (71).

5. A gold jewelry composite processing method according to claim 4, characterized in that: The control tube (75) is arranged on the top of the support platform (2) via a mounting member (73); the control tube (75) is slidably matched with the sliding hole (712); a plurality of ventilation holes (751) are provided on the control tube (75); one end of one of the control tubes (75) is connected to an exhaust fan (74) via a pipeline; and one end of another control tube (75) is connected to an air filter (76) via a pipeline.

6. A gold jewelry composite processing method according to claim 4, characterized in that: The four-column hydraulic press comprises a machine body (1) and a hydraulic cylinder mounted on the machine body (1); the machine body (1) comprises a base, the top of the base is provided with an opening, a movable pressure plate (11) is mounted on the piston end of the hydraulic cylinder, and the punch (9) is mounted on the bottom of the movable pressure plate (11).

7. A gold jewelry composite processing method according to claim 6, characterized in that: A heating unit (10) is provided in the base, and the heating unit (10) comprises a lifting cylinder (102) installed in the base and a heat insulation seat (101) installed at the piston end of the lifting cylinder (102), a heating plate (103) is embedded on the top of the heat insulation seat (101), and the heat insulation seat (101) is slidably matched with the opening and the matching hole (713).

8. A gold jewelry composite processing method according to claim 7, characterized in that: The die (8) is mounted on the top of the bearing seat (71); a receiving groove (85) slidably matched with the heat insulation seat (101) is provided at the bottom of the die (8); a plurality of molding cavities (81) are connected with the receiving groove (85) via connecting holes at the top of the die (8); an ejector pin (82) is slidably arranged in the connecting hole; a stopper (84) is installed at the bottom of the ejector pin (82); and a return spring (83) connected with the die (8) and the stopper (84) is provided on the outer sleeve of the ejector pin (82).

9. The gold jewelry composite processing method according to claim 1, characterized in that: A transfer device (3) is arranged between the laser cladding device and the CNC processing machine tool, and the transfer device (3) comprises a conveying module (33). A manipulator (31) is arranged on the top of a movable body of the conveying module (33), and a clamp (32) is installed at the moving end of the manipulator (31).

10. A gold jewelry composite processing method according to claim 4, characterized in that: An annealing device (4) is provided on one side of the CNC processing machine, and the annealing device (4) comprises a support seat (43) installed on the top of another support platform (2) and a lifting module (41) provided between the CNC processing machine and the other support platform (2), a heat preservation cover (42) is installed on the moving body of the lifting module (41), a temperature regulating module is installed in the heat preservation cover (42), and the mold is installed on the top of the support seat (43).

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