CN117905353A

CN117905353A - Hinge shaft part and processing method thereof

Info

Publication number: CN117905353A
Application number: CN202311735552.2A
Authority: CN
Inventors: 刘楠; 宋小兵
Original assignee: Ming Hao Auto Metal Parts Guangzhou Co ltd
Current assignee: Ming Hao Auto Metal Parts Guangzhou Co ltd
Priority date: 2023-12-15
Filing date: 2023-12-15
Publication date: 2024-04-19

Abstract

The application discloses a hinge shaft part and a processing method thereof, wherein the hinge shaft part comprises a rod part which is cylindrical and comprises an inserting part, a spline and a rotating part, wherein the inserting part is used for being inserted into a first connecting piece in a hinge mechanism, the rotating part is used for being in rotary connection with the first connecting piece in the hinge mechanism, and the spline is used for being in nested connection with a second connecting piece in the hinge mechanism; a flange connected to an end of the rod and having an integral structure with the rod; the inner hole penetrates through the flange to the rod part, and is a square blind hole; wherein, pole portion, flange and hole all set up coaxially. The hinge shaft part is provided with the spline and the flange for being connected with an external part, so that the functional requirement that the hinge shaft part in the automobile door structure needs to be linked with other parts is met; in order to produce the hinge shaft part, the cold extrusion process is used as a main process, so that the production efficiency of the part is improved, and the hinge shaft part is more suitable for mass production. The application relates to the technical field of automobile manufacturing.

Description

Hinge shaft part and processing method thereof

Technical Field

The application relates to the technical field of automobile manufacturing, in particular to a hinge shaft part and a processing method thereof.

Background

Hinge mechanism is a very common movable connection mechanism in the field of mechanical design, and a hinge is also called a hinge, and can enable two entities to rotate relatively around a rotation axis, so that the hinge mechanism is commonly used for an opening and closing structure of a door. The hinge mechanism generally includes two links connected to different entities, respectively, and a hinge shaft, with which both links are rotatably connected, so that the two links can be relatively rotated about the hinge shaft.

In the hinge mechanism, the frequent opening and closing of the hinge can generate abrasion on the hinge shaft, and in order to prolong the service life of the hinge mechanism, high requirements are made on the structural strength and the precision of the hinge shaft. In particular, in the automotive field, the door also uses a hinge mechanism, and the door has a higher opening and closing frequency, and the use environment is worse than that in a room, so that further requirements are put on hinge shaft parts.

The hinge shaft part on the automobile is not only used as a part of the hinge mechanism, but also needs to be linked with other parts on the automobile, for example, a spline, a flange, an inner hole or other structures are needed to be connected with other parts. This results in a special shape of the hinge shaft parts on the car, which typically requires CNC cutting to complete the machining. However, the cutting process is long in time and much in material consumption, and the processing efficiency can not meet the requirements in mass production. Therefore, a more efficient processing method is required.

Disclosure of Invention

The application aims to at least solve one of the technical problems in the prior art, and provides a hinge shaft part which can meet the functional requirements of an automobile door hinge mechanism; in addition, a processing method of the hinge shaft part is provided, which not only can produce the hinge shaft part capable of meeting the functional requirement of the automobile door hinge mechanism, but also can improve the production efficiency.

According to an embodiment of the first aspect of the present application, there is provided a hinge shaft piece including:

The rod part is cylindrical and comprises an insertion part, a spline and a rotating part, wherein the insertion part is used for being inserted into a first connecting piece in the hinge mechanism, the rotating part is used for being in rotating connection with the first connecting piece in the hinge mechanism, and the spline is used for being in nested connection with a second connecting piece in the hinge mechanism;

the flange is connected with the end part of the rod part and is of an integrated structure with the rod part;

the inner hole penetrates through the flange to the rod part, and the inner hole is a square blind hole;

the rod part, the flange and the inner hole are all coaxially arranged.

According to an embodiment of the first aspect of the present application, further, the number of the rotating parts is two and is respectively disposed at both ends of the spline.

According to an embodiment of the first aspect of the present application, further, an end portion of the insertion portion is in a truncated cone shape.

According to an embodiment of the first aspect of the present application, further, the side surface of the flange is provided with an abutment surface, and the abutment surface is a plane.

According to an embodiment of the first aspect of the present application, further, an arc-shaped notch is provided on a side surface of the flange.

According to an embodiment of the first aspect of the present application, further, an inner chamfer is provided at a junction of the inner hole and the flange.

According to a second aspect of the present application, there is provided a processing method for the hinge shaft part, comprising the steps of:

Feeding round steel material into cutting equipment and cutting out blanks;

feeding the blank into cold heading equipment for cold extrusion, and forming a square semi-finished flange at the end part of the blank;

punching and extruding the blank, and pushing a square punching rod into the blank to form the inner hole;

Cold extruding the end face of the blank to form the semi-finished flange into the flange;

inserting the punch rod into the inner hole, shrinking the rod and trimming the outer side of the blank, and forming the spline;

The insertion portion and the rotation portion are cut out using a cutting process.

According to a second aspect of the embodiment of the application, further, the end of the blank is cold extruded for forming an outer chamfer at the end of the blank before shaping the end of the blank into a semi-finished flange.

According to a second aspect of the embodiment of the present application, further, before punching and extruding the blank, cold extruding an end portion of the blank is performed for preforming the inner hole and forming the inner chamfer at the end portion of the blank.

According to an embodiment of the second aspect of the present application, further, an abutment surface and an arc-shaped notch are provided on a side surface of the flange, and the abutment surface is a plane; and cutting the abutting surface and the arc notch by using a cutting process after cutting the insertion part by using the cutting process.

The beneficial effects of the embodiment of the application at least comprise: the hinge shaft part is provided with the spline and the flange for being connected with an external part, so that the functional requirement that the hinge shaft part in the automobile door structure needs to be linked with other parts is met; in order to produce the hinge shaft part, the cold extrusion process is used as a main process, so that the production efficiency of the part is improved, and the hinge shaft part is more suitable for mass production.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is evident that the drawings described are only some embodiments of the application, but not all embodiments, and that other designs and drawings can be obtained from these drawings by a person skilled in the art without inventive effort.

FIG. 1 is a first three-dimensional view of a hinge shaft piece according to an embodiment of the first aspect of the present application;

FIG. 2 is a second three-dimensional view of a hinge shaft detail according to an embodiment of the first aspect of the present application;

FIG. 3 is a schematic diagram of steps a to c in a process according to an embodiment of the second aspect of the application;

FIG. 4 is a schematic diagram of steps d to f in the processing method according to the embodiment of the second aspect of the present application;

FIG. 5 is a schematic diagram of steps g to h in the processing method according to the embodiment of the second aspect of the present application.

Reference numerals: 100-rod part, 110-insert part, 120-spline, 130-rotating part, 200-flange, 210-abutting surface, 220-arc notch, 300-inner hole, 310-inner chamfer, 400-blank, 410-outer chamfer, 500-semi-finished flange.

Detailed Description

Reference will now be made in detail to the present embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present application, but not to limit the scope of the present application.

In the description of the present application, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

In the description of the present application, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present application, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present application can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

In this regard, the present application provides a hinge shaft part and a processing method thereof, wherein the hinge shaft part is provided with a spline 120 and a flange 200 for connecting with external parts, so as to meet the functional requirement that the hinge shaft part needs to be linked with other parts in the automobile door structure. In order to produce the hinge shaft part, the cold extrusion process is used as a main process, a processing thought of using a cutting process as the main process in the traditional processing method is replaced, the production efficiency of the part is improved, and the hinge shaft part is more suitable for batch production.

Referring to fig. 1 and 2, the hinge shaft part in the embodiment of the first aspect of the present application includes a shaft portion 100, a flange 200, and an inner hole 300. The shaft portion 100 and the flange 200 form a main body structure of the hinge shaft part, and the shaft portion and the flange are of an integrated structure and are formed by processing the same blank, so that the connection strength between the shaft portion and the flange is ensured. An internal bore 300, which is a blind bore, extends from the flange 200 into the stem 100 for connection with external parts. And the inner hole 300 is a square hole to prevent the external part from rotating in the inner hole 300, so that the external part and the hinge shaft part are kept relatively stationary.

It should be noted that the shaft portion 100, the flange 200 and the inner hole 300 are all coaxially disposed, so that the rotation axes of the three are coaxial, and the eccentric condition during rotation is reduced.

The hinge mechanism comprises two connecting pieces, wherein the two connecting pieces are a first connecting piece and a second connecting piece respectively, one connecting piece is connected to the vehicle body, the other connecting piece is connected to the vehicle door, and the two connecting pieces are in direct contact with the rod part 100 of the hinge shaft part. Specifically, the shaft portion 100 has a cylindrical shape, which includes an insertion portion 110, a spline 120, and a rotation portion 130. The insertion portion 110 is provided at a first end of the stem portion 100, and the flange 200 is provided at a second end of the stem portion 100. The insertion portion 110 is used for inserting a first connecting piece in the hinge mechanism to limit the radial movement of the hinge shaft part; the rotating part 130 is used for being rotationally connected with a first connecting piece in the hinge mechanism; the spline 120 is for nesting connection with a second connector in the hinge mechanism. When the two connectors rotate relatively with the rod 100 as a rotation axis, the spline 120 and the second connector are fixed to each other, so that the hinge shaft part rotates along with the second connector, and the first connector rotates relatively with the rotation part 130, so as to realize the opening and closing of the whole hinge mechanism.

In some embodiments, there is only one rotating portion 130, and the first connecting member is rotatably connected to the rotating portion 130; in other embodiments, two rotating parts 130 are provided at both ends of the spline 120, and the first connecting member is simultaneously connected to the two rotating parts 130 in a rotating manner. By providing two rotating parts 130, the rotation of the first connecting member can be made more stable and firm. It is to be easily understood that the number of the rotating parts 130 may be three or more, and the first connection member is rotatably connected to each rotating part 130, thereby further improving the connection strength of the first connection member with the hinge shaft part.

For the insertion portion 110, the outer diameter thereof is smaller than that of the rotation portion 130, so that a step is formed therebetween. In the process of inserting the hinge shaft part into the first connector, the insertion part 110 is inserted into the preformed hole of the first connector, and the step abuts against the surface of the first connector, so that an assembler can determine whether the hinge shaft part is mounted in place, and can also play a role in limiting the insertion depth of the insertion part 110. Specifically, the end of the insertion portion 110 is in a truncated cone shape, and the small diameter end of the truncated cone faces the first connector to be inserted. When the insertion portion 110 is inserted into the preformed hole of the first connector, the truncated cone-shaped insertion portion 110 can be guided to be mounted in place even if the position is shifted, facilitating the insertion of the insertion portion 110.

Further, the side surface of the flange 200 is provided with an abutment surface 210, the abutment surface 210 being a plane for abutting against an external part, by means of which abutment surface 210 the external part can be triggered, for example a trigger sensor and driving other movable parts.

Further, the flange 200 is provided with an arc-shaped notch 220 on the side for abutting against an external part, by which the external part can be triggered, for example a trigger sensor and driving other movable parts, by the arc-shaped notch 220.

Further, an inner chamfer 310 is provided at the junction of the inner bore 300 and the flange 200, and when an external part is inserted, the external part can be contacted with the inner chamfer 310 and slid into the inner bore 300 along the inclined surface of the inner chamfer 310 for guiding the external part to be correctly inserted into the inner bore 300.

The processing method in the embodiment of the second aspect of the application is used for processing the hinge shaft part and comprises the following steps:

S100, referring to a of FIG. 3, feeding round steel materials into cutting equipment and cutting out blanks 400, so that the length of the blanks 400 accords with the design length of the hinge shaft part;

S200, referring to b of FIG. 3, placing the blank 400 into cold heading equipment, performing cold extrusion on the end of the blank 400, and forming an outer chamfer 410 on the end of the blank 400 to eliminate burrs generated during blanking and prepare for subsequent forming of the flange 200;

s300, referring to c of fig. 3, cold extrusion is performed on the end of the blank 400, and a square semi-finished flange 500 is formed on the end of the blank 400, wherein the semi-finished flange 500 is square, so that the wall thickness is uniform when the square inner hole 300 is punched subsequently, and the possibility of cracking or collapsing at the thinner wall thickness is reduced;

S400, referring to d of FIG. 4, performing cold extrusion on the end of the blank 400, forming a pit in the end of the blank 400 for preforming the inner hole 300 and forming the inner chamfer 310;

s500, referring to e of FIG. 4, punching and extruding the blank 400, and pushing a square punching rod into the blank 400 to form an inner hole 300;

s600. referring to f of fig. 4, cold extruding the end surface of the blank 400, so that the square semi-finished flange 500 is formed into a circular flange 200;

S700, referring to g of FIG. 5, inserting a punch rod into the inner hole 300, shrinking and trimming the outer side of the blank 400, and forming the spline 120; the function of the punch is to fill the inner hole 300, and the punch can restrain the deformation degree of the inner hole 300 under the condition that the outer side of the blank 400 is pressed, so that the inner hole 300 meets the final design requirement;

s800. referring to h of fig. 5, the insertion portion 110 is cut using a cutting process; for the flange 200 provided with the abutment surface 210 and the arc-shaped notch 220 on the side surface, the abutment surface 210 and the arc-shaped notch 220 are also cut by a cutting process.

While the preferred embodiments of the present application have been illustrated and described, the present application is not limited to the embodiments, and various equivalent modifications and substitutions can be made by one skilled in the art without departing from the spirit of the present application, and these equivalent modifications and substitutions are intended to be included in the scope of the present application as defined in the appended claims.

Claims

1. A hinge shaft piece, comprising:

The rod part (100), the rod part (100) is cylindrical and comprises an inserting part (110), a spline (120) and a rotating part (130), the inserting part (110) is used for being inserted into a first connecting piece in the hinge mechanism, the rotating part (130) is used for being in rotating connection with the first connecting piece in the hinge mechanism, and the spline (120) is used for being in nested connection with a second connecting piece in the hinge mechanism;

A flange (200), wherein the flange (200) is connected with the end part of the rod part (100) and is of an integrated structure with the rod part (100);

An inner bore (300), the inner bore (300) extending from the flange (200) to the stem (100), the inner bore (300) being a square blind bore;

wherein the stem (100), the flange (200) and the bore (300) are all coaxially arranged.

2. The hinge shaft detail of claim 1, wherein: the number of the rotating parts (130) is two, and the rotating parts are respectively arranged at two ends of the spline (120).

3. The hinge shaft detail of claim 1, wherein: the end of the insertion part (110) is in a truncated cone shape.

4. The hinge shaft detail of claim 1, wherein: the side face of the flange (200) is provided with an abutting face (210), and the abutting face (210) is a plane.

5. The hinge shaft detail of claim 1, wherein: an arc-shaped notch (220) is formed in the side face of the flange (200).

6. The hinge shaft detail of claim 1, wherein: an inner chamfer (310) is arranged at the joint of the inner hole (300) and the flange (200).

7. A method of machining a hinge shaft part as claimed in any one of claims 1 to 6, comprising:

feeding the round steel material into a cutting device and cutting out a blank (400);

Feeding the blank (400) into cold heading equipment for cold extrusion, and forming a square semi-finished flange (500) at the end part of the blank (400);

Punching and extruding the blank (400), and pushing a square punching rod into the blank (400) to form the inner hole (300);

Cold extruding an end face of the blank (400) such that the semi-finished flange (500) is formed into the flange (200);

Inserting the punch rod into the inner hole (300), shrinking and trimming the outer side of the blank (400), and forming the spline (120);

The insert portion (110) and the rotating portion (130) are cut out using a cutting process.

8. The processing method according to claim 7, characterized in that: the end of the blank (400) is cold extruded for forming an outer chamfer (410) at the end of the blank (400) before forming the semi-finished flange (500) at the end of the blank (400).

9. The processing method according to claim 7, characterized in that: -cold extruding an end of the blank (400) for preforming the inner bore (300) and forming the inner chamfer (310) at the end of the blank (400) prior to punching the blank (400).

10. The processing method according to claim 7, characterized in that: an abutting surface (210) and an arc notch (220) are arranged on the side surface of the flange (200), and the abutting surface (210) is a plane; after the insert portion (110) is cut using a cutting process, the abutment surface (210) and the arcuate notch (220) are cut using a cutting process.