Grinding and polishing device for precious metal jewelry surface machining

Abstract

The invention relates to the technical field of precious metal jewelry manufacturing, in particular to a precious metal jewelry surface machining grinding and polishing device which comprises a protective shell, a base is fixedly connected to the inner wall of the bottom of the protective shell, a platform is fixedly connected to the top of the protective shell, and a sliding bottom column and a sliding top column are arranged at the tops of the two sides of the base; a sliding assembly used for adjusting the position of jewelry is arranged on the inner side of the protective shell, and a connecting rod assembly used for switching grinding of the inner wall and the outer wall of the jewelry is arranged in the sliding assembly. And meanwhile, the connecting rod assembly is used for switching the jewelry polishing position in stages for the jewelry.

Description

Technical Field

[0001] The invention relates to the technical field of precious metal jewelry manufacturing, in particular to a grinding and polishing device for precious metal jewelry surface processing. Background Art

[0002] In the jewelry manufacturing industry, precious metal jewelry is highly respected for its unique metallic luster and preciousness. However, precious metal jewelry needs to go through many processes in the production process, among which surface grinding and polishing is a crucial link. This process not only determines the final appearance and texture of the jewelry, but also directly affects consumers' willingness to buy and market value; The Chinese announcement number is: CN217728320U, which discloses a grinding and polishing device for jewelry surface processing, including a frame, the frame is equipped with a polishing mechanism for polishing jewelry and a negative pressure mechanism for providing negative pressure, the negative pressure mechanism is located below the polishing mechanism, and a collecting mechanism is provided between the negative pressure mechanism and the polishing mechanism; the collecting mechanism includes a first air-permeable gauze mounted on the frame and a second air-permeable gauze arranged on the top of the first air-permeable gauze, and a collecting cavity for collecting precious metal powder is formed between the first air-permeable gauze and the second air-permeable gauze; the second air-permeable gauze is provided with a plurality of collecting troughs connected to the collecting cavity, and a scraping mechanism for driving the precious metal powder into the collecting trough is provided above the second air-permeable gauze. The grinding and polishing device for jewelry surface processing of the present application can conveniently and separately recycle the precious metal powder, thereby improving the convenience of recycling the precious metal powder; Although the above patent uses a scraping mechanism to collect precious metal powders, which facilitates the recycling of precious metal powders, it is necessary to ensure the temperature of precious metal jewelry during the polishing process. When the polishing time is long, the heat generated may damage the jewelry. Secondly, if the same side of the jewelry is over-polished, the surface of the jewelry will be over-worn, which will make it more beautiful but affect its quality and subsequent service life. In view of this, we propose a grinding and polishing device for surface processing of precious metal jewelry. Summary of the invention

[0003] The object of the present invention is to provide a grinding and polishing device for precious metal jewelry surface processing to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides a grinding and polishing device for precious metal jewelry surface processing, comprising a protective shell, the bottom inner wall of the protective shell is fixedly connected to a base, the top of the protective shell is fixedly connected to a platform, the tops of both sides of the base are provided with sliding bottom columns and sliding top columns, the inner side of the protective shell is provided with a sliding component for adjusting the position of the jewelry, and the sliding component is provided with a connecting rod component for switching the grinding of the inner and outer walls of the jewelry, wherein: Through the sliding of the sliding assembly, the sliding bottom column and the sliding top column are used to complete the grinding and polishing of the inner and outer walls of the jewelry, and at the same time, the connecting rod assembly is used to complete the staged switching of the jewelry polishing position.

[0005] As a preferred embodiment of the present invention, a No. 1 slide rail is fixedly connected to the top of the base, a sliding bottom column is slidably connected to the No. 1 slide rail, a sliding top column is telescopically connected to the top of the sliding bottom column, and the sliding top column is slidably connected to the top of the platform.

[0006] As a preferred embodiment of the present invention, the inner side of the sliding top column is fixedly connected to a No. 1 fixed column, the outer wall of the No. 1 fixed column is slidably connected to a No. 1 sliding column, the inner side of the No. 1 sliding column is fixedly connected to a rack, the inner sides of the No. 1 sliding columns on both sides are fixedly connected to fixed plates, the surface of the fixed plate is provided with a strip hole, the inner side of the strip hole is slidably connected to a sliding rod, wherein: The No. 1 sliding column is fixedly connected to a No. 1 sliding plate at a side away from the rack, and a blocking plate is fixedly connected to an outer wall of the No. 1 sliding plate.

[0007] As a preferred embodiment of the present invention, one end of the sliding rod is slidably connected to an outer wall of one side of a sliding top column, a gear is fixedly connected to the outer wall of one end of the sliding rod close to the sliding top column, the gear is meshed and connected to the racks on both sides, and the sliding rod is fixedly connected to a No. 1 rotating wheel at the end away from the gear.

[0008] As a preferred embodiment of the present invention, a grinding roller is rotatably connected to the inner side of the upper end of the sliding top column, a No. 2 slide rail is fixedly connected to the inner side of the sliding bottom column, and a slider is slidably connected to the No. 2 slide rail.

[0009] As a preferred embodiment of the present invention, the sliding assembly includes a No. 2 fixed column, a No. 3 slide rail is provided on the inner side of the No. 2 fixed column, and the No. 3 slide rail is an electric slide rail, a vertical plate is fixedly connected to the top middle end of the No. 2 fixed column, a square hole is provided on the top of the vertical plate, a No. 2 sliding plate is slidably connected in the No. 3 slide rail, a No. 2 sliding plate is provided on the side away from the No. 2 fixed column, and an extension plate is slidably connected to the outer wall of the No. 2 sliding plate.

[0010] As a preferred embodiment of the present invention, the inner side of the annular triangular groove is in the shape of an annular step, the inner side of the square hole is slidably connected with a No. 2 sliding column, both sides of the No. 2 sliding column are fixedly connected with raised columns, the lower end of the raised column is fixedly connected with a cross column, and the cross column is hollow inside.

[0011] As a preferred embodiment of the present invention, a No. 3 sliding column is slidably connected to the inner side of the horizontal column, and a spring is sleeved on the outer wall of the No. 3 sliding column. The spring is located between the No. 3 sliding column and the inner wall of the horizontal column. The No. 3 sliding column is slidably connected in the annular triangular groove at one end close to the No. 2 sliding plate.

[0012] As a preferred embodiment of the present invention, the top of the No. 2 sliding column is telescopically connected to a support frame, both sides of the support frame are rotatably connected to No. 2 rotating wheels, and the top of the support frame is detachably connected to an arc-shaped limiting plate.

[0013] As a preferred embodiment of the present invention, the sliding assembly includes a connecting rod assembly, and the connecting rod assembly includes a connecting rod No. 1, a connecting rod No. 2 and a connecting rod No. 3. The connecting rod No. 1 is rotatably connected to the end of the extension plate away from the No. 2 sliding plate, the connecting rod No. 1 is rotatably connected to the middle end of the connecting rod No. 2 at the end away from the extension plate, one end of the connecting rod No. 2 is rotatably connected to the outer wall of the raised column, the connecting rod No. 2 is rotatably connected to the slider at the end away from the raised column, the connecting rod No. 3 is rotatably connected to both sides of the slider, and the connecting rod No. 3 is rotatably connected to both sides of the extension column at the end away from the slider.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the jewelry surface processing grinding and polishing device, the No. 2 sliding plate is driven to slide by the No. 3 slide rail, and under the restriction of the annular triangular groove, the support frame, the arc-shaped limit plate and the annular jewelry are driven to move up to grind the outer wall and move down to grind the inner wall. At the same time, under the restriction of the gear, the blocking plate on the steering side is driven to block the polished metal debris.

[0015] 2. In the jewelry surface processing grinding and polishing device, by rotating the No. 2 connecting rod at different angles on both sides, under the restriction of the No. 1 connecting rod and the No. 3 connecting rod, the sliding bottom column and the sliding top column on both sides will move relative to each other, and the grinding rollers on both sides will form a height difference. This makes this intermittent cross-grinding method effective in cooling down the jewelry when it is transported to the other side for grinding after the grinding on one side is completed, so as to prevent the jewelry from being damaged by excessive temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an overall three-dimensional schematic diagram of the grinding and polishing device for jewelry surface processing of the present invention; Figure 2 It is a schematic overall cross-sectional view of the grinding and polishing device for jewelry surface processing of the present invention; Figure 3 It is a schematic internal perspective view of the grinding and polishing device for jewelry surface processing of the present invention; Figure 4 It is a three-dimensional schematic diagram of the top of the platform of the grinding and polishing device for jewelry surface processing of the present invention; Figure 5It is a three-dimensional schematic diagram of the support frame of the jewelry surface processing grinding and polishing device of the present invention; Figure 6 It is a three-dimensional schematic diagram of the unfolding of the sliding column of the grinding and polishing device for jewelry surface processing of the present invention; Figure 7 A schematic diagram of the interior details of the protective shell of the jewelry surface processing grinding and polishing device of the present invention; Figure 8 It is a three-dimensional schematic diagram of the slide assembly of the grinding and polishing device for jewelry surface processing of the present invention; Fig. 9 A three-dimensional schematic diagram of the details of the connecting rod assembly of the grinding and polishing device for jewelry surface processing of the present invention; The meaning of each number in the figure is: 1. Protective shell; 11. Base; 111. Slide rail No. 1; 12. Sliding bottom column; 121. Sliding top column; 1211. Fixed column No. 1; 1212. Sliding column No. 1; 1213. Rack; 1214. Sliding plate No. 1; 122. Fixed plate; 123. Sliding rod; 1231. Gear; 1232. Rotating wheel No. 1; 124. Grinding roller; 13. Slide rail No. 2; 131. Sliding block; 14. Blocking plate; 2. Platform; 3. Sliding assembly; 31. Fixed column No. 2; 311. Slide rail No. 3; 312. Vertical plate; 313. Square hole; 314. Extension column; 32. Sliding plate No. 2; 321. Annular triangular groove; 322. Extension plate; 33. Sliding column No. 2; 331. Raised column; 332. Horizontal column; 3321. Sliding column No. 3; 3322. Spring; 333. Support frame; 3331. Rotating wheel No. 2; 334. Arc-shaped limit plate; 34. Connecting rod assembly; 341. Connecting rod No. 1; 342. Connecting rod No. 2; 343. Connecting rod No. 3. DETAILED DESCRIPTION

[0017] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0018] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0019] Embodiment 1 See also Figure 1-Figure 9 As shown, this embodiment provides a grinding and polishing device for surface processing of precious metal jewelry, including a protective shell 1, the bottom inner wall of the protective shell 1 is fixedly connected to a base 11, the top of the protective shell 1 is fixedly connected to a platform 2, the tops of both sides of the base 11 are provided with sliding bottom columns 12 and sliding top columns 121, the inner side of the protective shell 1 is provided with a sliding component 3 for adjusting the position of the jewelry, and the sliding component 3 is provided with a connecting rod component 34 for switching the grinding of the inner and outer walls of the jewelry, wherein: through the sliding of the sliding component 3, the sliding bottom column 12 and the sliding top column 121 are used to complete the grinding and polishing of the inner and outer walls of the jewelry, and at the same time, the connecting rod component 34 is used to complete the staged switching of the jewelry grinding position.

[0020] like Figure 2-Figure 6 As shown, the top of the base 11 is fixedly connected to a No. 1 slide rail 111, and a sliding bottom column 12 is slidably connected to the No. 1 slide rail 111. The top of the sliding bottom column 12 is telescopically connected to a sliding top column 121. The sliding top column 121 is slidably connected to the top of the platform 2. The inner side of the sliding top column 121 is fixedly connected to a No. 1 fixed column 1211. The outer wall of the No. 1 fixed column 1211 is slidably connected to a No. 1 sliding column 1212. The inner side of the No. 1 sliding column 1212 is fixedly connected to a rack 1213. The inner sides of the No. 1 sliding columns 1212 on both sides are fixedly connected to fixed plates 122. The surface of the fixed plate 122 is provided with a strip hole. The inner side of the strip hole is slidably connected to a sliding rod 123, wherein: the No. 1 sliding column 1 212 is fixedly connected to a sliding plate No. 1214 on the side away from the rack 1213, and the outer wall of the sliding plate No. 1214 is fixedly connected to a blocking plate 14, one end of the sliding rod 123 is slidably connected to the outer wall of one side of the sliding top column 121, and the outer wall of the sliding rod 123 at one end close to the sliding top column 121 is fixedly connected to a gear 1231, and the gear 1231 is meshed with the racks 1213 on both sides, and the sliding rod 123 is fixedly connected to a rotating wheel No. 1232 at the end away from the gear 1231, and the inner side of the upper end of the sliding top column 121 is rotatably connected to a grinding roller 124, and the inner side of the sliding bottom column 12 is fixedly connected to a No. 2 slide rail 13, and a slider 131 is slidably connected to the No. 2 slide rail 13.

[0021] like Figure 5 and 8 - Fig. 9 As shown, the sliding assembly 3 includes a No. 2 fixed column 31, a No. 3 slide rail 311 is provided on the inner side of the No. 2 fixed column 31, and the No. 3 slide rail 311 is an electric slide rail. A vertical plate 312 is fixedly connected to the middle end of the top of the No. 2 fixed column 31, and a square hole 313 is provided on the top of the vertical plate 312. A No. 2 sliding plate 32 is slidably connected to the No. 3 slide rail 311, and an annular triangular groove 321 is provided on the side of the No. 2 sliding plate 32 away from the No. 2 fixed column 31. An extension plate 322 is slidably connected to the outer wall of the No. 2 sliding plate 32, and the inner side of the annular triangular groove 321 is annular stepped, and a No. 2 sliding column 33 is slidably connected to the inner side of the square hole 313. The two sides of the No. 2 sliding column 33 are fixed A raised column 331 is fixedly connected, and a transverse column 332 is fixedly connected to the lower end of the raised column 331. The transverse column 332 is hollow inside, and a No. 3 sliding column 3321 is slidably connected to the inner side of the transverse column 332. A spring 3322 is sleeved on the outer wall of the No. 3 sliding column 3321, and the spring 3322 is located between the No. 3 sliding column 3321 and the inner wall of the transverse column 332. The No. 3 sliding column 3321 is slidably connected in the annular triangular groove 321 at one end close to the No. 2 sliding plate 32. The top of the No. 2 sliding column 33 is telescopically connected to a support frame 333, and No. 2 rotating wheels 3331 are rotatably connected to both sides of the support frame 333. The top of the support frame 333 is detachably connected to an arc-shaped limiting plate 334.

[0022] For this purpose, the electric slide rail is composed of components such as a track, a slider, a motor and a controller. The slider is driven to move on the track, thereby driving the second slide plate 32 to move.

[0023] like Fig. 9 As shown, the sliding assembly 3 includes a connecting rod assembly 34, and the connecting rod assembly 34 includes a No. 1 connecting rod 341, a No. 2 connecting rod 342 and a No. 3 connecting rod 343. The No. 1 connecting rod 341 is rotatably connected to the end of the extension plate 322 away from the No. 2 sliding plate 32, the No. 1 connecting rod 341 is rotatably connected to the middle end of the No. 2 connecting rod 342 at the end away from the extension plate 322, one end of the No. 2 connecting rod 342 is rotatably connected to the outer wall of the protruding column 331, the No. 2 connecting rod 342 is rotatably connected to the slider 131 at the end away from the protruding column 331, the No. 3 connecting rod 343 is rotatably connected to both sides of the slider 131, and the No. 3 connecting rod 343 is rotatably connected to both sides of the extension column 314 at the end away from the slider 131.

[0024] It can be seen from this that in the process of grinding and polishing the ring jewelry, if Figure 1-Figure 3As shown, the staff first places the jewelry on the arc-shaped limit plate 334 and fixes it under the restriction of the second rotating wheel 3331 and the first rotating wheel 1232. At this time, the second sliding plate 32 slides left and right under the drive of the third sliding rail 311. When the second sliding plate 32 slides to the right, the corresponding third sliding column 3321 gradually slides in the lower groove of the annular triangular groove 321 and gradually slides up in the inclined groove. At this time, the third sliding column 3321 is affected by the annular triangular groove 321 to drive the second sliding column 33 to slide upward in the square hole 313. At the same time, the second sliding column 33 will drive The support frame 333, the second rotating wheel 3331 and the first rotating wheel 1232 move upward together, and the second rotating wheel 3331 and the first rotating wheel 1232 rotate under the electric drive, and drive the annular jewel to rotate. When driving the jewel to move upward, the jewel will contact the bottom of the upper grinding roller 124 to grind the outer wall of the jewel, and when the second sliding column 33 slides back to the bottom of the annular triangular groove 321, the second sliding column 33 returns to the initial position, at this time, the annular jewel is separated from the upper grinding roller 124, and the inner wall of the annular jewel contacts the lower grinding roller 124 to grind the inner wall of the annular jewel; It should be noted that during the rotation of the No. 1 rotating wheel 1232, the gear 1231 will be driven to rotate together, and during the rotation of the gear 1231, the No. 1 sliding column 1212 on one side will be driven to slide upward, while the No. 1 sliding column 1212 on the other side will be against the platform. Because the No. 1 rotating wheel 1232 is in the same direction as the gear 1231 and the ring-shaped jewelry, during the rotation of the gear 1231, it will slide along the rack 1213 on one side, and drive the No. 1 sliding column 1212 on the other side to slide upward, and also drive the blocking plate 14 on this side to slide upward, so as to block the polishing debris of the jewelry and prevent splashing; At the same time, if Fig. 9 As shown, during the upward sliding process of the second sliding column 33, the second connecting rod 342 will be driven to rotate upward. At the same time, under the restriction of the first connecting rod 341 and the third connecting rod 343, as the rotation angle of the second connecting rod 342 increases, the sliding bottom column 12 will be gradually pulled close to the second fixed column 31, and the grinding roller 124 on the sliding top column 121 will be gradually driven to be on the same vertical plane as the annular jewel fixed on the arc-shaped limiting plate 334. During the downward sliding process of the second sliding column 33, the sliding bottom column 12 and the sliding top column 121 will be driven to gradually move away from the second fixed column 31, and the sliding bottom columns 12 and the sliding top columns 121 on both sides will move at the same time, which forms a situation that after the annular jewel reaches the fixed position, different positions of the jewel can be polished respectively, and this intermittent cross-type polishing method can effectively cool down the jewel when it is transported to the other side for polishing after the polishing is completed on one side, so as to prevent the jewel from being damaged due to excessive temperature. It should be noted that when the No. 2 connecting rod 342 rotates to the horizontal position, the sliding bottom column 12 and the sliding top column 121 are farthest away from the No. 2 fixed column 31, and when the No. 2 sliding column 33 drives the No. 2 connecting rod 342 to rotate, the No. 1 connecting rod 341 rotates with the middle end of the No. 2 connecting rod 342. At this time, after the No. 2 connecting rod 342 has a certain angle, it will drive the sliding bottom column 12 to displace, and under the restriction of the No. 3 connecting rod 343, the No. 2 connecting rod 342 in the horizontal state is in a state of rotating upward or downward. When the connecting rod 342 on the other side is rotated from the horizontal position to the inclined position, the sliding bottom column 12 will gradually move away from the No. 2 fixed column 31, and when the connecting rod 342 on the other side is rotated from the horizontal position to the inclined position, the sliding bottom column 12 will gradually approach the No. 2 fixed column 31, thus forming the sliding bottom columns 12 on both sides moving with the No. 2 sliding column 33.

[0025] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A grinding and polishing device for precious metal jewelry surface processing, comprising a protective shell (1), characterized in that: The bottom inner wall of the protective shell (1) is fixedly connected to a base (11), the top of the protective shell (1) is fixedly connected to a platform (2), the tops of both sides of the base (11) are provided with sliding bottom columns (12) and sliding top columns (121), the inner side of the protective shell (1) is provided with a sliding assembly (3) for adjusting the position of the jewellery, and the sliding assembly (3) is provided with a connecting rod assembly (34) for switching the polishing of the inner and outer walls of the jewellery, wherein: By sliding the sliding assembly (3), the inner and outer walls of the jewellery are polished using the sliding bottom column (12) and the sliding top column (121), and at the same time, the connecting rod assembly (34) is used to switch the jewellery polishing position in stages.

2. A grinding and polishing device for precious metal jewelry surface processing according to claim 1, characterized in that: The top of the base (11) is fixedly connected to a first slide rail (111), the first slide rail (111) is slidably connected to a sliding bottom column (12), the top of the sliding bottom column (12) is telescopically connected to a sliding top column (121), and the sliding top column (121) is slidably connected to the top of the platform (2).

3. A grinding and polishing device for precious metal jewelry surface processing according to claim 2, characterized in that: The inner side of the sliding top column (121) is fixedly connected to a No. 1 fixing column (1211), the outer wall of the No. 1 fixing column (1211) is slidably connected to a No. 1 sliding column (1212), the inner side of the No. 1 sliding column (1212) is fixedly connected to a rack (1213), the inner sides of the No. 1 sliding columns (1212) on both sides are fixedly connected to fixing plates (122), the surface of the fixing plates (122) is provided with strip holes, the inner sides of the strip holes are slidably connected to sliding rods (123), wherein: The first sliding column (1212) is fixedly connected to a first sliding plate (1214) on a side away from the rack (1213), and the outer wall of the first sliding plate (1214) is fixedly connected to a blocking plate (14).

4. A grinding and polishing device for precious metal jewelry surface processing according to claim 3, characterized in that: One end of the sliding rod (123) is slidably connected to an outer wall of one side of the sliding top column (121); a gear (1231) is fixedly connected to the outer wall of the sliding rod (123) at one end close to the sliding top column (121); the gear (1231) is meshingly connected to racks (1213) at two sides; and a number one rotating wheel (1232) is fixedly connected to the end of the sliding rod (1233) away from the gear (1231).

5. A grinding and polishing device for precious metal jewelry surface processing according to claim 4, characterized in that: A grinding roller (124) is rotatably connected to the inner side of the upper end of the sliding top column (121), a second slide rail (13) is fixedly connected to the inner side of the sliding bottom column (12), and a sliding block (131) is slidably connected to the second slide rail (13).

6. A grinding and polishing device for precious metal jewelry surface processing according to claim 5, characterized in that: The sliding assembly (3) includes a No. 2 fixed column (31), a No. 3 slide rail (311) is provided on the inner side of the No. 2 fixed column (31), and the No. 3 slide rail (311) is an electric slide rail. A vertical plate (312) is fixedly connected to the middle end of the top of the No. 2 fixed column (31), and a square hole (313) is provided on the top of the vertical plate (312). A No. 2 slide plate (32) is slidably connected to the No. 3 slide rail (311), and a circular triangular groove (321) is provided on the side of the No. 2 slide plate (32) away from the No. 2 fixed column (31), and an extension plate (322) is slidably connected to the outer wall of the No. 2 slide plate (32).

7. A grinding and polishing device for precious metal jewelry surface processing according to claim 6, characterized in that: The inner side of the annular triangular groove (321) is annularly stepped, the inner side of the square hole (313) is slidably connected to a second sliding column (33), both sides of the second sliding column (33) are fixedly connected to protruding columns (331), the lower end of the protruding column (331) is fixedly connected to a transverse column (332), and the transverse column (332) is hollowed out internally.

8. The grinding and polishing device for precious metal jewelry surface processing according to claim 7, characterized in that: A third sliding column (3321) is slidably connected to the inner side of the transverse column (332); a spring (3322) is sleeved on the outer wall of the third sliding column (3321); the spring (3322) is located between the third sliding column (3321) and the inner wall of the transverse column (332); and the third sliding column (3321) is slidably connected to the annular triangular groove (321) at one end close to the second sliding plate (32).

9. A grinding and polishing device for precious metal jewelry surface processing according to claim 8, characterized in that: The top of the second sliding column (33) is telescopically connected to a support frame (333), two sides of the support frame (333) are rotatably connected to second rotating wheels (3331), and the top of the support frame (333) is detachably connected to an arc-shaped limiting plate (334).

10. A grinding and polishing device for precious metal jewelry surface processing according to claim 9, characterized in that: The sliding assembly (3) includes a connecting rod assembly (34), and the connecting rod assembly (34) includes a first connecting rod (341), a second connecting rod (342) and a third connecting rod (343). The first connecting rod (341) is rotatably connected to an end of the extension plate (322) away from the second sliding plate (32); the first connecting rod (341) is rotatably connected to the middle end of the second connecting rod (342) at an end away from the extension plate (322); one end of the second connecting rod (342) is rotatably connected to the outer wall of the protruding column (331); the second connecting rod (342) is rotatably connected to the slider (131) at an end away from the protruding column (331); the third connecting rod (343) is rotatably connected to both sides of the slider (131); and the third connecting rod (343) is rotatably connected to both sides of the extension column (314) at an end away from the slider (131).

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