Diameter expanding and shaping device for decorative bracelet

Abstract

The utility model relates to a decorative bracelet expanding and shaping device, which solves the problems of synchronous finishing of expanding and shaping of decorative bracelets and prevention of oversize expanding of the bracelets. According to the scheme, the device comprises a shaping core mold part and a core mold control part, wherein the shaping core mold part is formed by combining an elastic shaping mold and a shaping core mold; a conical expansion control hole is formed in the axis of the elastic shaping die, shaping stepped shafts with different diameters are arranged on the outer circle of the elastic shaping die, and a set of core die reducing grooves are evenly formed in the axis direction. The shaping core mold is composed of a conical shaft and an optical shaft. And the core mold control part drives the shaping core mold through a control handle and a control gear, so that the elastic shaping mold deforms to implement diameter-expanding shaping on the bracelet. The hand ring expanding and shaping device has the advantages of being simple in structure, convenient to operate, high in size precision, capable of synchronously completing hand ring expanding and shaping at a time and high in production efficiency. By replacing the shaping core mold part, the requirements of the expanding and shaping process for the bracelets of various sizes can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of circular ring shaping fixtures, in particular to a kind of decorative bracelet diameter (enlarging diameter) shaping device for metal circular ring shaping and expanding. BACKGROUND

[0002] The circular ring component that can be plastically deformed, after thermoforming or cold forming, can all appear irregular circular ring or the inner diameter of circular ring is small and other non-compliance technical requirements phenomenon. Especially the jewelry industry of noble metal, such as the processing of noble metal bracelet worn by people, since the inner diameter size of bracelet changes from large to small process and its difficulty, the processing of existing noble metal bracelet is under the premise of meeting noble metal weight, the inner diameter size of bracelet is manufactured to be less than required inner diameter size and preliminary circular ring shape, after bracelet expanding and shaping process, the size of technical requirements is reached. Moreover, expanding and shaping in the prior art are carried out in two-step process. The bracelet expanding and shaping process in the prior art is manually completed on a die by an operator according to experience, and the prior art has the following disadvantages: low production efficiency, high technical requirements for operators, and especially when the inner diameter size of bracelet is larger than the technical requirement, it brings great trouble to subsequent inner diameter size reduction. SUMMARY

[0003] To solve the problems of decorative bracelet diameter expansion exceeding technical requirements and expanding and shaping being completed simultaneously, improve efficiency, reduce technical requirements for operators and prevent bracelet diameter expansion from exceeding required size, the utility model discloses a decorative bracelet diameter expanding and shaping device.

[0004] The technical solution adopted by the utility model to achieve the purpose of the invention is as follows: a decorative bracelet diameter expanding and shaping device, comprising: a rack part, a shaping core die part and a core die control part.

[0005] The shaping core die part comprises: an elastic shaping die and a shaping core die, the elastic shaping die is an integral part provided with a tapered expansion control hole at the shaft center, the outer circle is a shaping stepped shaft with different diameters, a group of core die diameter change grooves are uniformly arranged along the axial direction of the elastic shaping die, and one end of the elastic shaping die is connected with the rack part through threaded connection.

[0006] The shaping core die is composed of a tapered shaft with the same taper as the tapered expansion control hole of the elastic shaping die and an optical shaft, the optical shaft of the shaping core die is provided with a rack, one end of the optical shaft is provided with a threaded limiting shaft, the shaping core die is connected with the rack part through the optical shaft to form a sliding connection of shaft hole cooperation, and a limiting nut is arranged on the threaded limiting shaft.

[0007] The core mold control part comprises a control gear and a control handle, the control gear is rotationally installed on the frame part, and the control handle is coaxially fixedly connected to the control gear.

[0008] The bracelet expanding and shaping can be simultaneously completed once, and the production efficiency is high.

[0009] The utility model discloses make detailed instructions in connection with the drawing. DRAWINGS

[0010] The drawing is the schematic diagram of the cross section structure of the utility model. Figure 1 The drawing is the schematic diagram of the cross section structure of the utility model.

[0011] The drawing is the schematic diagram of the cross section structure of the utility model. Figure 2 The drawing is the schematic diagram of the cross section structure of the utility model.

[0012] The drawing is the schematic diagram of the cross section structure of the utility model. Figure 3 The drawing is the schematic diagram of the cross section structure of the utility model.

[0013] The drawing is the schematic diagram of the cross section structure of the utility model. Figure 4 The drawing is the schematic diagram of the cross section structure of the utility model.

[0014] The drawing is the schematic diagram of the cross section structure of the utility model. Figure 5 The drawing is the schematic diagram of the cross section structure of the utility model.

[0015] In the drawing, 1. elastic shaping die, 1-1. tapered expansion control hole, 1-2. shaping stepped shaft, 1-3. core mold variable diameter groove, 1-4. threaded connecting shaft, 2. shaping core mold, 2-1. tapered shaft, 2-2. optical axis, 2-3. rack, 2-4. threaded limiting shaft, 2-5. limiting nut, 3-1. control gear, 3-2. control handle, 4. frame part. DETAILED DESCRIPTION

[0016] Referring to the drawing, a decorative bracelet expanding and shaping device comprises a frame part, a shaping core mold part and a core mold control part.

[0017] The shaping core mold part comprises an elastic shaping die 1 and a shaping core mold 2, the elastic shaping die 1 is provided with a tapered expansion control hole 1-1 at the axis, the outer circle is a shaping stepped shaft 1-2 with different diameters, a group of core mold variable diameter grooves 1-3 are evenly arranged along the axial direction of the elastic shaping die 1, and one end of the elastic shaping die 1 is threadedly connected with the frame part 4 through a threaded connecting shaft 1-4.

[0018] The shaping core mould 2 is composed of a tapered shaft 2-1 with the same taper as the tapered expansion control hole 1-1 of the elastic shaping mould 1 and an optical axis 2-2, a rack 2-3 is arranged on the optical axis 2-2 of the shaping core mould 2, and a threaded limiting shaft 2-4 is arranged at one end of the optical axis 2-2, the shaping core mould 2 is slidably connected with the frame part 4 through the optical axis 2-2 and the shaft hole, and a limiting nut 2-5 is arranged on the threaded limiting shaft 2-4.

[0019] The core mould control part comprises a control gear 3-1 and a control handle 3-2, the control gear 3-1 is rotatably arranged on the frame part 4, and the control handle 3-2 is coaxially fixedly connected with the control gear 3-1 at one end, and the control gear 3-1 in the core mould control part is engaged with the rack 2-3 on the shaping core mould 2 in the shaping core mould part.

[0020] The utility model discloses first the elastic shaping mould 1 is in the opening end of core mould reducing groove 1-3 and is tightly deformed processing. Make elastic shaping mould 1 every section outer diameter is less than the attitude of design size.

[0021] When using, the bracelet that needs to be expanded and shaped is sleeved on the shaping stepped shaft 1-2 corresponding to the diameter of the elastic shaping mould 1 (since the actual diameter is less than the design size in this attitude), the control handle 3-2 is controlled to control the rotation of the control gear 3-1, the control gear 3-1 pushes the shaping core mould 2 to completely match the tapered expansion control hole 1-1 of the elastic shaping mould 1 through the rack 2-3, the elastic shaping mould 1 is elastically restored to the original design shape (as shown in the accompanying drawings), and the bracelet sleeved on the shaping stepped shaft 1-2 corresponding to the diameter of the elastic shaping mould 1 is deformed to the same shape and size as the outer contour size of the elastic shaping mould 1 along with the elastic recovery of the elastic shaping mould 1 to the original design shape. Figure 4

[0022] The shaping core mould 2 controls the maximum moving distance of the shaping core mould 2 by adjusting the limiting nut 2-5 on the threaded limiting shaft 2-4.

[0023] One end of the elastic shaping mould 1 is threadedly connected with the frame part 4 through a threaded connecting shaft 1-4, and different sizes of the elastic shaping mould 1 are replaced to adapt to the expansion and shaping of bracelets of different sizes.

[0024] In the utility model embodiment, the shaping stepped shaft 1-2 of the elastic shaping mould 1 is composed of a group of optical shaft segments with different diameters and tapered shaft connecting segments between the optical shaft segments, each diameter of the optical shaft segment is suitable for the expansion and shaping of a bracelet of the same size, and the tapered shaft connecting segments between the optical shaft segments with different diameters facilitate the entry of the bracelet into the optical shaft segment with a larger inner diameter.​

Claims

1. A diameter-expanding and shaping device for a decorative bracelet, comprising: The frame part, the shaping core mold part and the core mold control part are characterized by: The shaping core mold part comprises: an elastic shaping mold (1) and a shaping core mold (2); the elastic shaping mold (1) is provided with a tapered expansion control hole (1-1) at the axis, and the outer circle is a shaping stepped shaft (1-2) with different diameters; the elastic shaping mold (1) is provided with a group of core mold diameter reducing grooves (1-3) evenly distributed along the axis direction; one end of the elastic shaping mold (1) is threadedly connected to the frame part (4) via a threaded connecting shaft (1-4); The shaping core mold (2) is composed of a tapered shaft (2-1) having the same taper as the tapered expansion control hole (1-1) of the elastic shaping mold (1) and an optical axis (2-2); a rack (2-3) is provided on the optical axis (2-2) of the shaping core mold (2); a threaded limiting shaft (2-4) is provided at one end of the optical axis (2-2); the shaping core mold (2) is connected to the frame part (4) via the optical axis (2-2) to form a sliding connection with the shaft hole, and a limiting nut (2-5) is provided on the threaded limiting shaft (2-4); The core mold control part comprises: a control gear (3-1) and a control handle (3-2); the control gear (3-1) is rotatably mounted on the frame part (4); one end of the control handle (3-2) is coaxially fixedly connected to the control gear (3-1); the control gear (3-1) in the core mold control part is meshed with a rack (2-3) on the shaping core mold (2) in the shaping core mold part.

2. The diameter-expanding and shaping device for a decorative bracelet according to claim 1, characterized in that: The shaping stepped shaft (1-2) of the elastic shaping die (1) is composed of a group of optical axis segments with different diameters and tapered shaft connecting segments between the optical axis segments.

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