CN112427894B - Machining method of high-precision thin-wall part - Google Patents

Abstract

The invention discloses a method for processing a high-precision thin-wall part, which comprises the following steps: s1, cutting the raw materials into long-strip-shaped plates; s2, bending the strip-shaped plate into an annular structure and fixing the annular structure on a mandrel, wherein the inner wall of the annular structure is tightly attached to the outer surface of the mandrel; s3, grinding the outer surface of the annular structure by using a cylindrical grinder until the required thickness value is reached and the wall thickness tolerance requirement is met; and S4, unfolding the annular structure, and processing the required thin-wall parts on the unfolded strip-shaped plate. The invention has the advantages of convenient operation, high processing efficiency, meeting the requirement of thickness tolerance and the like.

Description

Machining method of high-precision thin-wall part

Technical Field

The invention relates to a machining method, in particular to a machining method of a high-precision thin-wall part.

Background

For high-precision thin-wall parts, such as shims, the thickness dimension is required to be less than or equal to 0.5mm, and the thickness tolerance is less than or equal to 0.02mm, as shown in the attached figures 1 and 2.

For the thin-walled parts shown in fig. 1 and 2, in order to meet the thickness tolerance requirement, the conventional machining method adopts flat grinding. When the thin-wall parts are processed by flat grinding, the thin-wall parts are fixed by adopting a magnetic disk adsorption mode. Because the raw materials are not flat in a natural state and fixed under the action of magnetic force, the parts cannot be fully attached to the bearing surface of the magnetic disk due to the limited magnetic force, and certain elastic deformation exists in the machining process, so that the thickness tolerance cannot meet the requirement of being less than or equal to 0.02mm after flat grinding machining.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a method for machining a high-precision thin-wall part, which is convenient to operate, high in machining efficiency and capable of meeting the requirement of thickness tolerance.

In order to solve the technical problems, the invention adopts the following technical scheme:

a processing method of a high-precision thin-wall part comprises the following steps:

s1, cutting the raw materials into long-strip-shaped plates;

s2, bending the strip-shaped plate into an annular structure and fixing the annular structure on a mandrel, wherein the inner wall of the annular structure is tightly attached to the outer surface of the mandrel;

s3, grinding the outer surface of the annular structure by using a cylindrical grinder until the required thickness value is reached and the wall thickness tolerance requirement is met;

and S4, unfolding the annular structure, and processing the required thin-wall parts on the unfolded strip-shaped plate.

As a further improvement of the above technical solution: the detailed steps of step S2 include:

s2.1, bending the strip-shaped plate into an annular structure, and welding and fixing the lap position;

s2.2, the annular structure is sleeved on the mandrel, an avoiding groove is formed in the mandrel and is provided with a detachable pressing plate, and the opening overlapping position of the annular structure is pressed in the avoiding groove through the pressing plate.

As a further improvement of the above technical solution: the pressing plate is fixedly connected with the mandrel through a fastener.

As a further improvement of the above technical solution: in step S4, a desired thin-walled part is formed by press working.

Compared with the prior art, the invention has the advantages that: the invention discloses a processing method of a high-precision thin-wall part, which comprises the steps of cutting a raw material into a long strip-shaped plate, bending the long strip-shaped plate into an annular structure, fixing the annular structure on a mandrel, enabling the inner wall of the annular structure to be attached to the outer surface of the mandrel, grinding the annular structure on an excircle grinder so as to meet the requirement of high wall thickness tolerance of the thin-wall part, unfolding the annular structure after the excircle grinding is finished, and processing the required thin-wall part on the long strip-shaped plate after grinding, wherein the operation is very convenient, and the processing efficiency is high.

Drawings

FIG. 1 is a schematic front view of a thin-walled part.

FIG. 2 is a side view of a thin-walled component.

Fig. 3 is a front view of the strip-shaped plate material of the present invention.

Fig. 4 is a schematic top view of the strip-shaped plate material of the present invention.

Fig. 5 is a front view of the elongated sheet material bent into a ring structure according to the present invention.

Fig. 6 is a schematic cross-sectional view of the elongated sheet material bent into a ring-shaped structure according to the present invention.

FIG. 7 is a front view of the mandrel of the present invention.

FIG. 8 is a side view of the mandrel of the present invention.

The reference numerals in the figures denote: 1. a mandrel; 11. avoiding the groove.

Detailed Description

The invention is described in further detail below with reference to the figures and specific examples of the specification.

Fig. 3 to 8 show an embodiment of the processing method of the high-precision thin-wall part according to the present invention, and the processing method of the high-precision thin-wall part of the present embodiment has the following processes:

step one, blanking: selecting proper raw materials according to the required specification and considering the grinding allowance and the stamping allowance, and cutting the raw materials into long-strip-shaped plates;

and step two, welding: bending the strip-shaped plate into an annular structure, and welding and fixing the lap openings;

step three, fixing: according to the diameter of an inner hole of the annular structure, amandrel 1 for cylindrical grinding is manufactured, the annular structure is sleeved on themandrel 1, a pressing plate (not shown in the figure) is connected with themandrel 1 through a threaded fastener, so that the opening lapping position of the annular structure is positioned in the avoiding groove 11, interference in the cylindrical grinding process is avoided, the rest part of the annular structure is tightly attached to the outer surface of themandrel 1, and deformation in the cylindrical grinding process is avoided;

fourthly, grinding the workpiece by using an external cylindrical grinding machine until the workpiece reaches a required thickness value and the requirement of wall thickness difference is met;

fifthly, stamping: after the annular structure with the required thickness and the wall thickness difference is obtained through cylindrical grinding, the annular structure is unfolded to form a strip-shaped plate, and then required annular or other-shaped parts are machined through punching or other machining modes.

In other embodiments, the strip-shaped plate can be tightly sleeved on themandrel 1 in other modes, so that the inner wall of the strip-shaped plate can be tightly attached to the outer surface of themandrel 1, and the deformation in the grinding process can be avoided; the expansion of the ring structure can be realized by cutting, for example, and will not be described in detail.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.

Claims (4)

1. A processing method of high-precision thin-wall parts is characterized by comprising the following steps: the method comprises the following steps:

s1, cutting the raw materials into long-strip-shaped plates;

s2, bending the strip-shaped plate into an annular structure and fixing the annular structure on a mandrel (1), wherein the inner wall of the annular structure is tightly attached to the outer surface of the mandrel (1);

s3, grinding the outer surface of the annular structure by using a cylindrical grinder until the required thickness value is reached and the wall thickness tolerance requirement is met;

and S4, unfolding the annular structure, and processing the required thin-wall parts on the unfolded strip-shaped plate.

2. The method for processing a high-precision thin-walled part according to claim 1, wherein: the detailed steps of step S2 include:

s2.1, bending the strip-shaped plate into an annular structure, and welding and fixing the lap position;

s2.2, the annular structure is sleeved on the mandrel (1), an avoiding groove (11) is formed in the mandrel (1) and a detachable pressing plate is arranged in the avoiding groove, and the opening position of the annular structure is pressed in the avoiding groove (11) through the pressing plate.

3. The method for processing a high-precision thin-walled part according to claim 2, wherein: the pressing plate is fixedly connected with the mandrel through a fastener.

4. The machining method of a high-precision thin-walled part according to any one of claims 1 to 3, characterized in that: in step S4, a desired thin-walled part is formed by press working.

Images