CN111250934A

CN111250934A - Processing technology of hinge shaft in iron door hinge

Info

Publication number: CN111250934A
Application number: CN202010142232.6A
Authority: CN
Inventors: 殷金法
Original assignee: Pinghu Yongxin Hardware Products Co Ltd
Current assignee: Pinghu Yongxin Hardware Products Co Ltd
Priority date: 2020-03-04
Filing date: 2020-03-04
Publication date: 2020-06-09

Abstract

The invention discloses a processing technology of a hinge shaft in an iron door hinge, which is characterized by comprising the following steps: cutting, namely straightening the round steel material and feeding the round steel material into a corresponding device to cut the round steel material into blanks with required sizes; shaping, namely conveying the blank into a shaping die for extrusion, so that the shape of the blank is extruded into the shape of the hinge shaft; the method comprises the following steps of (1) stretching and guiding, namely feeding a blank into a stretching and guiding die, carrying out central axial extrusion on the blank so as to extrude a central hole in the center of the blank, and simultaneously, radially overflowing the material at the extruded part of the center so as to increase the axial and radial sizes of the blank; second-stage shaping, namely conveying the blank into a second-stage shaping die for extrusion, and trimming the appearance of the blank; stretching and extruding the blank to further increase the axial and radial dimensions of the blank; and (3) three-stage shaping, namely conveying the blank into a three-stage shaping die for shaping to finish processing. The invention reduces the material consumption and the production cost.

Description

Processing technology of hinge shaft in iron door hinge

Technical Field

The invention relates to a processing technology of a hinge shaft in an iron door hinge.

Background

Hinges are mechanical devices used to connect two solid bodies and allow relative rotation between them.

Most hinge structures consist of two hinge assemblies and a pin. The hinge assembly has a web and a hinge bore, which is produced by punching out a profile having a web and a hinge plate from a sheet metal, which profile is bent by a corresponding device to form the hinge bore, i.e. the hinge assembly is finished. And (4) butting hinge holes of the two hinge external members to penetrate the pin shaft, so as to complete the installation of the hinge structure. The hinge structure under the structure is suitable for light-weight environment, but cannot bear weight practical environment.

There is a hinge for iron door, which comprises two hinge shafts with central holes and a rotating shaft simultaneously mounted in the central holes of the two hinge shafts. When the hinge shaft is produced, the hinge shaft is made of solid steel materials through the processes of shaping and center punching, has the characteristic of high structural strength, and can be suitable for heavy working conditions. However, when the hinge shaft is produced, a central punching process is required, and when punching is performed, more materials can be punched from raw materials, and the materials cannot be used continuously and can only be recycled as waste materials, so that the material consumption is relatively serious, and the production cost is relatively high.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a processing technology of a hinge shaft in an iron door hinge, which reduces the material consumption and the production cost.

In order to achieve the purpose, the invention provides the following technical scheme:

a processing technology for a hinge shaft in an iron door hinge is characterized by comprising the following steps:

cutting, namely straightening the round steel material and feeding the round steel material into a corresponding device to cut the round steel material into blanks with required sizes;

shaping, namely conveying the blank into a shaping die for extrusion, so that the shape of the blank is extruded into the shape of the hinge shaft;

the method comprises the following steps of (1) stretching and guiding, namely feeding a blank into a stretching and guiding die, carrying out central axial extrusion on the blank so as to extrude a central hole in the center of the blank, and simultaneously, radially overflowing the material at the extruded part of the center so as to increase the axial and radial sizes of the blank;

second-stage shaping, namely conveying the blank into a second-stage shaping die for extrusion, and trimming the appearance of the blank;

stretching and extruding the blank to further increase the axial and radial dimensions of the blank;

and (3) three-stage shaping, namely conveying the blank into a three-stage shaping die for shaping to finish processing.

Preferably, the one-stage shaping step includes a first shaping station and a second shaping station, so that the blank is gradually deformed.

Preferably, the stretching guide step includes a first stretching station and a second stretching station so that the blank is gradually deformed.

Preferably, in the three-stage shaping step, a round chamfer is formed at the orifice of the central hole of the blank.

Preferably, the cutting, the first shaping, the drawing guide, the second shaping, the drawing and the third shaping are all carried out in a cold header.

The invention has the advantages that: in the process of forming the center hole of the blank, the material originally positioned in the center hole is extruded to the edge position to form the pipe wall of the hinge shaft, so that no material loss exists in the production process of the hinge shaft, and the production cost is obviously reduced.

Drawings

Fig. 1 is a schematic view illustrating a process flow of a hinge shaft in the iron door hinge provided in this embodiment;

fig. 2 is a schematic view of a hinge shaft in the iron door hinge provided in the present embodiment.

Detailed Description

The process for machining the hinge shaft in the iron door hinge according to the present invention will be further described with reference to fig. 1 to 2.

and cutting, namely straightening the rolled round steel material by using a drawing cold-drawing device, and sending the straightened round steel material into a cold header to cut the round steel material into blanks with required sizes. It should be noted that the axial and radial dimensions of the blank 1 obtained after cutting are smaller than those of the formed product;

and a step of shaping, namely feeding the blank 1a into a shaping die for extrusion, so that the shape of the blank 1a is extruded to be the shape of the hinge shaft. Namely, the shaping die is provided with an shaping hole, the axial section of the shaping hole is the same as the axial shape of the hinge shaft, one end of the shaping hole is communicated with an ejector rod 3, the other end of the shaping hole is communicated with an extrusion punch 4, so as to extrude the blank 1a in the shaping hole, after extrusion, the outer wall of the blank 1a is attached to the inner wall of the shaping hole, and the ejector rod is used for ejecting the blank out of the shaping hole;

and (3) stretching and guiding, namely sending the blank 1b into a stretching and guiding die 2b, and carrying out central axial extrusion on the blank 1b to extrude a central hole in the center of the blank 1, and simultaneously, radially overflowing the material at the extruded part of the center to increase the axial and radial sizes of the blank 1 b. The drawing guide die is provided with a drawing guide hole, the axial section of the drawing guide hole is the same as that of the hinge shaft, one end of the drawing guide hole is supported by an ejector rod 3b, and the other end of the drawing guide hole is pressed by a drawing punch 4 b;

second-stage shaping, namely conveying the blank 1c into a second-stage shaping die for extrusion, and finishing the appearance of the blank 1; during correction, the inner wall of the two-section shaping die 2c, the ejector rod 3c, the extrusion punch 4c and the top plate 5c limit the blank 1 c;

stretching, extruding the stretched blank 1d, so that the axial and radial dimensions of the blank 1d are further increased;

and (3) three-stage shaping, namely sending the blank 1e into a three-stage shaping die to finish processing. The three-section shaping structure is based on a two-section shaping structure, and a fillet extrusion structure 6e is added to form a round chamfer on a central hole orifice of the blank 1 e.

The above steps are all carried out inside the cold header, and the embodiment is not described in detail for the prior art.

In the hinge shaft forming process, the material originally positioned at the center hole of the blank is extruded to the edge position to form the pipe wall of the hinge shaft, so that no material loss exists in the hinge shaft production process, and the production cost is obviously reduced; all the procedures can be realized in the cold header, and the production of the hinge shaft is obviously facilitated.

The embodiment is further configured as follows: the one-stage shaping step includes a first shaping station and a second shaping station so that the blank 1a is deformed step by step. With the process steps, the blank 1a can be conveniently molded, and the molding quality can be improved.

The embodiment is further configured as follows: the drawing guide step includes a first drawing station and a second drawing station, so that the blank 1b is gradually deformed. In the same way, the forming precision of the hinge shaft can be improved under the process step.

Unless otherwise specified, in the present invention, if there is an orientation or positional relationship indicated by terms of "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing orientation or positional relationship in the present invention are for illustrative purposes only, and should not be construed as limiting the present patent, specific meanings of the above terms can be understood by those of ordinary skill in the art in light of the specific circumstances in conjunction with the accompanying drawings.

Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass, for example, being fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. A processing technology for a hinge shaft in an iron door hinge is characterized by comprising the following steps:

2. The process for machining the hinge shaft in the iron door hinge according to claim 1, wherein the process comprises the following steps: the shaping step comprises a first shaping position and a second shaping position, so that the blank is gradually deformed.

3. The process for machining the hinge shaft in the iron door hinge according to claim 1, wherein the process comprises the following steps: the stretching and guiding step comprises a first stretching position and a second stretching position, so that the blank is gradually deformed.

4. The process for machining the hinge shaft in the iron door hinge according to claim 1, wherein the process comprises the following steps: in the three-stage shaping step, a round chamfer is formed at the orifice of the central hole of the blank.

5. The process for machining the hinge shaft in the iron door hinge according to claim 1, wherein the process comprises the following steps: cutting, first-stage shaping, stretching guiding, second-stage shaping, stretching and third-stage shaping are all carried out in a cold header.