A method for processing a hollow ring blank

Abstract

The present invention discloses a method for processing a hollow ring blank, comprising the following steps: S1, tube drawing: bending a straight sheet into a straight tube; S2, straight tube welding: welding the weld seam of the straight tube and polishing the weld seam; S3, winding: winding the straight tube into a spiral tube; S4, cutting: cutting the spiral tube along the center line of the spiral tube and the plane where the end thereof is located to obtain a plurality of open ring tubes; S5, ring tube welding: welding a single open ring tube into a closed-loop circular tube and polishing the weld seam; S6, molding: placing the closed-loop circular tube in a molding die for molding to obtain a ring blank. The process of the present invention is simple and has high production efficiency. It only takes ten minutes from cutting the straight sheet of precious metal to molding the ring blank, which greatly shortens the processing time compared to the existing electroplating process and wax mold process for manufacturing hollow rings.

Description

Technical Field

[0001] The present invention relates to the technical field of ring processing, and in particular to a method for processing a hollow ring blank. Background Art

[0002] A ring is a piece of jewelry worn on a finger. Its base is a solid ring-shaped base, and its price is proportional to its weight. Existing solid rings are heavy and expensive, which brings financial pressure to consumers. In addition, due to the heavy weight of solid rings, long-term wearing of rings will leave deep ring marks on the fingers.

[0003] In order to solve the above problems, hollow rings have appeared on the market. Hollow rings have the advantages of light weight and low cost. The existing processing methods of hollow rings usually use wax molds and electroplating methods. Such processing methods have the problems of long processing time and low yield rate. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology, the present invention provides a method for processing a hollow ring blank, which has a simple process, short processing time, high production efficiency, and avoids the ring wall from sinking inward during processing, thereby improving the yield rate.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A method for processing a hollow ring blank comprises the following steps:

[0007] S1, tube drawing: bending the straight sheet into a straight tube;

[0008] S2, straight pipe welding: weld the weld of the straight pipe and polish the weld;

[0009] S3, winding: winding the straight tube into a spiral tube;

[0010] S4, cutting: cutting the spiral tube along the center line of the spiral tube and the plane where the ends are located to obtain a ring tube with multiple openings;

[0011] S5, annular tube welding: welding a single open annular tube into a closed circular tube and polishing the weld;

[0012] S6, molding: placing the closed-loop circular tube in a shaping mold for shaping to obtain a ring blank, the shaping mold includes a plurality of die sets arranged in a ring array, each die set includes a cylindrical outer die and inner die, the outer die and inner die are provided with shaping grooves on their circumferential walls, the shaping grooves on the outer die and inner die in each die set form a shaping position, the plurality of shaping positions when the outer die and inner die rotate to shape the circular tube to obtain a ring blank, wherein the depths of the shaping grooves on the outer die in the plurality of die sets are set to alternately change between deep and shallow, the depths of the shaping grooves on the inner die in the plurality of die sets are also set to alternately change between deep and shallow, and the depths of the shaping grooves on the outer die and the inner die in the same die set are inconsistent.

[0013] As a further improvement of the above technical solution, the number of the die groups is four, and the depths of the shaping grooves on the outer dies in the four die groups are 1 / 3, 1 / 2, 1 / 3, and 1 / 2 of the diameter of the circular tube, respectively; the depths of the shaping grooves on the outer dies in the four die groups are 1 / 2, 1 / 3, 1 / 2, and 1 / 3 of the diameter of the circular tube, respectively; the depths of the shaping grooves on the outer dies and inner dies in the same die group are 1 / 3 and 1 / 2 or 1 / 2 and 1 / 3 of the diameter of the circular tube, respectively.

[0014] As a further improvement of the above technical solution, the shapes of the shaping grooves on the outer and inner concave molds are circular, rectangular, rounded rectangular or trapezoidal, and ring blanks of different shapes can be obtained according to the shapes of the formation grooves.

[0015] As a further improvement of the above technical solution, the inner die can be moved in the opposite direction of the outer die, and the outer diameter of the annular ring formed by the inner die after moving in the plurality of die groups is smaller than the inner diameter of the circular tube.

[0016] As a further improvement of the above technical solution, the outer die can be moved toward or in the opposite direction of the inner die.

[0017] As a further improvement of the above technical solution, a tube drawing machine is used to bend the straight sheet into a straight tube in step S1, and the straight sheet passes through the diamond eye of the tube drawing machine to form a straight tube.

[0018] As a further improvement of the above technical solution, argon arc welding is used during welding in steps S2 and S5, and the weld is welded by a silicon carbide nozzle of the argon arc welding equipment, and the diameter of the flame ejected by the silicon carbide nozzle is less than 0.4 mm.

[0019] As a further improvement to the above technical solution, a spring winding machine is used to wind the straight tube into a spiral tube in step 3, and two adjacent turns of the straight tube are in contact when winding the straight tube.

[0020] As a further improvement of the above technical solution, in step S4, a slicer with a tungsten steel toothless saw blade is used to cut the spiral tube.

[0021] The beneficial effects of the present invention are:

[0022] 1. The process is simple and the production efficiency is high. It only takes ten minutes from cutting the straight sheet of precious metal to forming the ring blank. Compared with the existing electroplating process and wax mold process for manufacturing hollow rings, the processing time is greatly shortened.

[0023] 2. This solution improves the shaping process and generates force on the ring blank through multiple shaping positions. By setting the shaping grooves of the outer and inner concave molds of the multiple shaping positions in alternating depths, it can prevent the wall of the circular tube from sinking inward, thereby obtaining a defective ring product. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and examples.

[0025] Figure 1 This is a flow chart of the hollow ring blank processing method of the present invention;

[0026] Figure 2 Schematic diagram of the spiral tube being cut into a single annular tube in the present invention;

[0027] Figure 3 It is a structural schematic diagram of the shaping mold of the present invention;

[0028] Figure 4 It is a schematic diagram of the moving directions of the outer concave mold and the inner concave mold of the shaping mold of the present invention.

[0029] Reference numerals: 10, outer concave mold; 11, first shaping groove; 20, inner concave mold; 21, second shaping groove. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the invention can be combined interactively without conflicting with each other.

[0031] Reference Figure 1 A method for processing a hollow ring blank comprises the following steps:

[0032] S1, tube drawing: bending the straight sheet into a straight tube;

[0033] S2, straight pipe welding: weld the weld of the straight pipe and polish the weld;

[0034] S3, winding: winding the straight tube into a spiral tube;

[0035] S4, cutting: cutting the spiral tube along the center line of the spiral tube and the plane where the ends are located to obtain a ring tube with multiple openings;

[0036] S5, annular tube welding: welding a single open annular tube into a closed circular tube and polishing the weld;

[0037] S6, molding: placing the closed-loop circular tube in a molding die for molding to obtain a ring blank.

[0038] Specifically, the shaping mold includes 4 die groups arranged in a circular array. In other embodiments, the number of die groups can be 3, 5, 6, 8, etc. Each die group includes a cylindrical outer die 10 and an inner die 20. The outer die 10 and the inner die 20 are respectively provided with a first shaping groove 11 and a second shaping groove 21. The first shaping groove 11 and the second shaping groove 21 in each die group form a shaping position. When an external force drives the outer die 10 and the inner die 20 to rotate, multiple shaping positions shape the circular tube to obtain a ring blank. Here, ring blanks of different shapes can be obtained according to the shapes of the first shaping groove 11 and the second shaping groove 21. For example, if the shapes of the first shaping groove 11 and the second shaping groove 21 are circular, rectangular, rounded rectangular or trapezoidal, then a ring blank with a circular, rectangular, rounded rectangular or trapezoidal cross-section can be obtained.

[0039] More specifically, the depths of the first shaping grooves 11 in the plurality of die sets are arranged in an alternating manner, and the depths of the second shaping grooves 21 in the plurality of die sets are also arranged in an alternating manner, and the depths of the first shaping grooves 11 and the second shaping grooves 21 in the same die set are inconsistent. Figure 3 In the figure, h represents the diameter of the circular tube. In this embodiment, the depths of the first shaping groove 11 in the four die sets are 1 / 3, 1 / 2, 1 / 3, and 1 / 2 of the circular tube diameter, respectively. The depths of the second shaping groove 21 in the four die sets are 1 / 2, 1 / 3, 1 / 2, and 1 / 3 of the circular tube diameter, respectively. In the same die set, the depths of the first shaping groove 11 and the second shaping groove 21 are 1 / 3 and 1 / 2 of the circular tube diameter, respectively, or the depths of the first shaping groove 11 and the second shaping groove 21 are 1 / 2 and 1 / 3 of the circular tube diameter, respectively. In other embodiments, the depths of the first shaping groove 11 and the second shaping groove 21 can be adaptively modified, such as 2 / 3h, 2 / 5h, etc.

[0040] In this embodiment, through the above-mentioned structural arrangement, the forces acting on the circular tube during shaping change alternately, and at the same time, multiple shaping positions provide multiple forces acting on the circular tube at even intervals, so that when the circular tube is shaped into a ring blank, the wall of the circular tube can be prevented from being forced to sink into the tube, thereby avoiding the production of defective products and improving the quality of ring production.

[0041] In this embodiment, in order to facilitate the loading of the circular tube onto the shaping mold for shaping, the inner die 20 can be moved in the opposite direction of the outer die 10. The outer diameter of the annular ring formed by the inner die 20 after moving in the multiple die groups is smaller than the inner diameter of the circular tube. At this time, the circular tube is put on the multiple inner die 20, and the inner die 20 is moved and reset to press the circular tube between the inner die 20 and the outer die 10.

[0042] Furthermore, the outer die 10 can move toward / in the opposite direction of the inner die 20. This arrangement allows the positions of the inner die 20 and the outer die 10 to be adjusted, making it easier to load the circular tube onto the shaping die for shaping. It can also accommodate circular tubes of different sizes.

[0043] In the present embodiment, a tube drawing machine is used to bend the straight sheet into a straight tube in step S1, and the straight sheet is formed into a straight tube through the diamond eye of the tube drawing machine, so that the gap of the straight tube obtained is relatively small. Argon arc welding is used for welding in steps S2 and S5, and the weld is welded by the silicon carbide nozzle of the argon arc welding equipment. The diameter of the flame ejected by the silicon carbide nozzle is less than 0.4 mm. Since the ring is small in size and thin in wall, it is easy to penetrate the wall by other welding methods such as plasma welding, so that better welding effect can be achieved by welding by argon arc welding. A spring winding machine is used to wind the straight tube into a spiral tube in step 3. When the straight tube is wound, the two adjacent turns of the tube are in contact, so as to obtain a nearly circular blank as much as possible, which is convenient for welding the fracture. In step S4, a slicer with a tungsten steel toothless saw blade is used to cut the spiral tube, which has the advantages of smooth incision, less residual material and no dust.

[0044] The above is a specific description of the preferred implementation of the present invention, but the invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A method for processing a hollow ring blank, characterized by: The following steps are involved: S1, tube drawing: bending the straight sheet into a straight tube; S2, straight pipe welding: weld the weld of the straight pipe and polish the weld; S3, winding: winding the straight tube into a spiral tube; S4, cutting: cutting the spiral tube along the center line of the spiral tube and the plane where the ends are located to obtain a ring tube with multiple openings; S5, annular tube welding: welding a single open annular tube into a closed circular tube and polishing the weld; S6, molding: placing the closed-loop circular tube in a shaping mold for shaping to obtain a ring blank, the shaping mold includes a plurality of die sets arranged in a ring array, each die set includes a cylindrical outer die and inner die, the outer die and inner die are provided with shaping grooves on their circumferential walls, the shaping grooves on the outer die and inner die in each die set form a shaping position, the plurality of shaping positions when the outer die and inner die rotate to shape the circular tube to obtain a ring blank, wherein the depths of the shaping grooves on the outer die in the plurality of die sets are set to alternately change between deep and shallow, the depths of the shaping grooves on the inner die in the plurality of die sets are also set to alternately change between deep and shallow, and the depths of the shaping grooves on the outer die and the inner die in the same die set are inconsistent.

2. The method for processing a hollow ring blank according to claim 1, characterized in that: The number of the die sets is four, and the depths of the shaping grooves on the outer dies in the four die sets are 1 / 3, 1 / 2, 1 / 3, and 1 / 2 of the diameter of the circular tube, respectively. The depths of the shaping grooves on the outer dies in the four die sets are 1 / 2, 1 / 3, 1 / 2, and 1 / 3 of the diameter of the circular tube, respectively. The depths of the shaping grooves on the outer dies and the inner dies in the same die set are 1 / 3 and 1 / 2 or 1 / 2 and 1 / 3 of the diameter of the circular tube, respectively.

3. The method for processing a hollow ring blank according to claim 1, characterized in that: The shaping grooves on the outer and inner concave molds are in the shape of a circle, a rectangle, a rounded rectangle or a trapezoid. Ring blanks of different shapes can be obtained according to the shapes of the shaping grooves.

4. The method for processing a hollow ring blank according to claim 1, characterized in that: The inner concave die can move in the opposite direction of the outer concave die, and the outer diameter of the annular ring formed by the inner concave die after moving in the plurality of concave die groups is smaller than the inner diameter of the circular tube.

5. The method for processing a hollow ring blank according to claim 4, characterized in that: The outer die can be moved toward or in the opposite direction of the inner die.

6. The method for processing a hollow ring blank according to claim 1, characterized in that: In step S1, a tube drawing machine is used to bend the straight sheet into a straight tube, and the straight sheet passes through the diamond eye of the tube drawing machine to form a straight tube.

7. The method for processing a hollow ring blank according to claim 1, characterized in that: Argon arc welding is used during welding in steps S2 and S5, and the weld is welded by a silicon carbide nozzle of the argon arc welding equipment. The diameter of the flame ejected by the silicon carbide nozzle is less than 0.4 mm.

8. The method for processing a hollow ring blank according to claim 1, characterized in that: In step 3, a spring winding machine is used to wind the straight tube into a spiral tube, and two adjacent turns of the straight tube are in contact when the straight tube is wound.

9. The method for processing a hollow ring blank according to claim 1, characterized in that: In step S4, a slicer with a tungsten steel toothless saw blade is used to cut the spiral tube.

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