Self-centering clamping device for thin-wall cylindrical part

Abstract

The invention discloses a self-centering clamping device for a thin-wall cylindrical part. The self-centering clamping device comprises a base and a clamping ring. The base is of a disc-shaped structure; a cylindrical clamping blind hole is formed in the center of the upper end face of the base, an annular mounting groove is formed in the outer ring of the cylindrical clamping blind hole in the upper end face of the base, and an annular clamping part is formed between the cylindrical clamping blind hole and the annular mounting groove; connecting threads are machined on the outer ring side face of the annular installation groove, the inner ring side face of the annular installation groove is machined to be a circular truncated cone face converging upwards, and a set of contraction notches evenly distributed in the circumference are formed in the annular clamping part. The clamping ring is in threaded connection with the interior of the circular-ring-shaped mounting groove of the base, and the clamping ring extrudes inwards in the radial direction through the circular truncated cone face, so that the annular clamping part of the base clamps an internal workpiece. According to the clamping device, deformation and vibration in the machining process are reduced, and self-centering can be achieved.

Description

Technical Field

[0001] The invention relates to a self-centering clamping device for thin-walled cylindrical parts, belonging to the technical field of thin-walled parts clamping. Background Art

[0002] Since thin-walled parts have thin walls, the cutting system consisting of the workpiece, tool, and fixture has poor rigidity, and the workpiece is easily deformed under the clamping force. In addition, the workpiece is easily vibrated and deformed by the radial cutting force and back force during cutting, which affects the dimensional accuracy and shape and position accuracy of the workpiece.

[0003] When clamping thin-walled parts, the clamping force needs to be evenly distributed and the clamping contact surface needs to be increased to avoid deformation caused by excessive local force. At the same time, the rigidity and positioning accuracy of the clamping tooling directly affect the stability and accuracy of part processing. A reasonable clamping solution can reduce the time of loading and unloading and improve production efficiency. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that when traditional tooling is used to process thin-walled parts, the workpiece is easily deformed due to excessive force, and the rigidity and positioning accuracy of the clamping tooling are poor. For this purpose, a self-centering clamping device for thin-walled cylindrical parts is provided.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] A self-centering clamping device for thin-walled cylindrical parts of the present invention comprises a base and a clamping ring; the base is a disc-shaped structure; a cylindrical clamping blind hole is opened at the center of the upper end surface of the base, and an annular mounting groove is opened on the outer ring of the cylindrical clamping blind hole on the upper end surface of the base, so that an annular clamping part is formed between the cylindrical clamping blind hole and the annular mounting groove; the outer ring side surface of the annular mounting groove is processed with a connecting thread, and the inner ring side surface of the annular mounting groove is processed into a frustum surface that converges upward, and a group of shrinkage notches evenly distributed around the circumference are opened on the annular clamping part;

[0007] The outer ring side wall of the clamping ring is processed with a connecting thread matching the outer ring side of the circular ring mounting groove of the base, and the inner ring side wall of the clamping ring is processed into a frustum surface matching the inner ring side of the circular ring mounting groove of the base;

[0008] The clamping ring is threadedly connected in the circular annular mounting groove of the base. The clamping ring radially presses the inner ring side surface of the circular annular mounting groove of the base through the frustum surface of the inner ring side wall, so that the annular clamping part of the base clamps the internal workpiece.

[0009] Furthermore, in order to improve the clamping effect of the annular clamping portion, the depth of the cylindrical clamping blind hole is smaller than the depth of the annular mounting groove.

[0010] Furthermore, to facilitate the installation of the clamping ring, a wrench hole is processed on the upper end surface of the clamping ring.

[0011] Working process

[0012] When clamping a thin-walled workpiece, first insert the thin-walled workpiece into the cylindrical clamping blind hole of the base, so that the bottom of the thin-walled workpiece is tightly against the inner bottom of the cylindrical clamping blind hole of the base, and then the clamping ring is threadedly connected in the annular mounting groove of the base. During the process of the clamping ring being screwed downward, the clamping ring radially presses the inner ring side surface of the annular mounting groove of the base through the frustum surface of the inner ring side wall, so that the annular clamping part of the base clamps the thin-walled workpiece;

[0013] When the thin-walled workpiece is disassembled, the clamping ring is rotated in the opposite direction to remove the thin-walled workpiece from the cylindrical clamping blind hole of the base.

[0014] Beneficial Effects

[0015] The clamping device of the present invention has a tightly matched internal structure and good overall rigidity. The device is in surface contact with the workpiece when clamped, which greatly reduces deformation and vibration during processing. At the same time, the tooling can be self-centering, and the clamping and unloading of the workpiece can be achieved only by screwing the clamping ring in and out. The operation is convenient and suitable for mass production and processing of thin-walled parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A cross-sectional view of the self-centering clamping device of the present invention;

[0017] Figure 2 A three-dimensional diagram of the self-centering clamping device of the present invention;

[0018] In the figure, 1-wedge ring, 2-base. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Example

[0021] like Figure 1 , 2 As shown, a self-centering clamping device for thin-walled cylindrical parts of the present invention comprises a base 2 and a clamping ring 1; the base 2 is a disc-shaped structure; a cylindrical clamping blind hole is opened at the center of the upper end surface of the base 2, and an annular mounting groove is opened on the outer ring of the cylindrical clamping blind hole on the upper end surface of the base 2, so that an annular clamping part is formed between the cylindrical clamping blind hole and the annular mounting groove; the outer ring side surface of the annular mounting groove is processed with a connecting thread, and the inner ring side surface of the annular mounting groove is processed into a frustum surface that converges upward, and a group of shrinkage notches evenly distributed around the circumference are opened on the annular clamping part;

[0022] The outer ring side wall of the clamping ring 1 is processed with a connecting thread that matches the outer ring side of the circular mounting groove of the base 2, and the inner ring side wall of the clamping ring 1 is processed into a frustum surface that matches the inner ring side of the circular mounting groove of the base 2;

[0023] The clamping ring 1 is threadedly connected in the annular mounting groove of the base 2. The clamping ring 1 radially squeezes the inner ring side surface of the annular mounting groove of the base 2 through the frustum of the inner ring side wall, so that the annular clamping part of the base 2 clamps the internal workpiece.

[0024] Furthermore, in order to improve the clamping effect of the annular clamping portion, the depth of the cylindrical clamping blind hole is smaller than the depth of the annular mounting groove.

[0025] Furthermore, in order to facilitate the installation of the clamping ring 1 , a wrench hole is processed on the upper end surface of the clamping ring 1 .

[0026] Working process

[0027] When clamping a thin-walled workpiece, first insert the thin-walled workpiece into the cylindrical clamping blind hole of the base 2, so that the bottom of the thin-walled workpiece is tightly against the inner bottom of the cylindrical clamping blind hole of the base 2, and then the clamping ring 1 is threadedly connected in the annular mounting groove of the base 2. During the process of screwing the clamping ring 1 downward, the clamping ring 1 radially presses the inner ring side surface of the annular mounting groove of the base 2 inward through the frustum of the inner ring side wall, so that the annular clamping part of the base 2 clamps the thin-walled workpiece;

[0028] When disassembling a thin-walled workpiece, the clamping ring 1 is rotated in the opposite direction to remove the thin-walled workpiece from the cylindrical clamping blind hole of the base 2 .

Claims

1. A self-centering clamping device for thin-walled cylindrical parts, characterized by: It comprises a base and a clamping ring; the base is a disc-shaped structure; a cylindrical clamping blind hole is opened at the center of the upper end surface of the base, and a circular mounting groove is opened on the outer ring of the cylindrical clamping blind hole on the upper end surface of the base, so that an annular clamping part is formed between the cylindrical clamping blind hole and the circular mounting groove; the outer ring side surface of the circular mounting groove is processed with a connecting thread, the inner ring side surface of the circular mounting groove is processed into a frustum surface that converges upward, and a group of shrinkage notches evenly distributed around the circumference are opened on the annular clamping part; The outer ring side wall of the clamping ring is processed with a connecting thread matching the outer ring side of the circular ring mounting groove of the base, and the inner ring side wall of the clamping ring is processed into a frustum surface matching the inner ring side of the circular ring mounting groove of the base; The clamping ring is threadedly connected in the circular annular mounting groove of the base. The clamping ring radially presses the inner ring side surface of the circular annular mounting groove of the base through the frustum surface of the inner ring side wall, so that the annular clamping part of the base clamps the internal workpiece.

2. A self-centering clamping device for thin-walled cylindrical parts according to claim 1, characterized in that: The depth of the cylindrical clamping blind hole is smaller than the depth of the annular mounting groove.

3. A self-centering clamping device for thin-walled cylindrical parts according to claim 1 or 2, characterized in that: The upper end surface of the clamping ring is processed with a wrench hole.

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