Spline positioning internal expansion turning tool

Abstract

A spline positioning internal expansion turning tool comprises a machine tool connecting flange, the right side of the machine tool connecting flange is coaxially connected with a transition flange, the right side of the transition flange is coaxially connected with a spline mandrel, the right end of the spline mandrel extends rightwards to form an expansion sleeve, an expansion hole is formed in the right end face of the expansion sleeve along the axis, and an expansion shaft is arranged in the expansion hole. The right end face of the positioning sleeve is located on the left side of the right end face of the tensioning sleeve, and a gap is formed between the inner circumferential face of the positioning sleeve and the outer circumferential face of the tensioning sleeve. The right end face of the positioning sleeve makes contact with the bowl bottom plane of the workpiece, accurate positioning of the workpiece in the length direction is guaranteed, the tensioning shaft is tightly ejected through a tailstock ejector pin of a machine tool, the tensioning sleeve expands to be tightly attached to an inner hole of the workpiece, the workpiece is tensioned, and stable clamping of the workpiece is achieved. High stability and positioning precision of the workpiece are kept in the machining process, and the machining quality and efficiency of the workpiece are improved.

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to a tooling fixture, and especially to a spline positioning internal expansion turning tooling fixture. Background Art

[0002] In the process of machining automotive parts, the machining quality directly affects the performance and service life of the final product. In the prior art, for some workpieces with complex shapes, due to the unstable clamping of the workpiece and the low positioning accuracy, the workpiece is prone to shaking or deviation during the machining process, affecting the machining accuracy and efficiency. Summary of the Invention

[0003] The purpose of the utility model is to provide a spline positioning internal expansion turning tooling fixture, and the spline positioning internal expansion turning tooling fixture of the utility model is to solve the technical problems of unstable clamping of the workpiece and low positioning accuracy in the prior art.

[0004] A spline positioning internal expansion turning tooling fixture of the utility model includes a machine tool connection flange. A transition flange is coaxially connected to the right side of the machine tool connection flange. A spline core shaft is coaxially connected to the right side of the transition flange. The right end of the spline core shaft extends rightward to form a tension sleeve. A tension hole is arranged along the axis in the right end face of the tension sleeve. A tension shaft is arranged in the tension hole. A positioning sleeve is coaxially sleeved on the tension sleeve. The right end face of the positioning sleeve is located to the left of the right end face of the tension sleeve. A gap is arranged between the inner circumferential surface of the positioning sleeve and the outer circumferential surface of the tension sleeve.

[0005] Further, four semi-circular adjusting blocks are arranged at intervals along the circumferential direction on the machine tool connection flange. An adjusting bolt is respectively connected to any one of the semi-circular adjusting blocks. The semi-circular adjusting block contacts the transition flange.

[0006] Compared with the prior art, the effect of the utility model is positive and obvious. The right end face of the positioning sleeve of the utility model contacts the bottom plane of the workpiece bowl to ensure the precise positioning of the workpiece in the length direction. The tailstock center of the machine tool is used to push and tighten the tension shaft. The tension sleeve expands and tightly fits the inner hole of the workpiece to tighten the workpiece, realizing the stable clamping of the workpiece, so that the workpiece maintains high stability and positioning accuracy during the machining process, improving the machining quality and efficiency of the workpiece. Brief Description of the Drawings

[0007] Figure 1 It is a schematic diagram of a spline positioning internal expansion turning tooling fixture of the utility model.

[0008] Figure 2 It is a schematic diagram of the positioning sleeve in a spline positioning internal expansion turning tooling fixture of the utility model.

[0009] Figure 3 It is a schematic diagram of the tension shaft in a spline positioning internal expansion turning tooling fixture of the utility model again. Detailed implementation mode

[0010] The present utility model will be further described below in conjunction with embodiments. However, the present utility model is not limited to these embodiments. Any similar structure and its similar changes of the present utility model should be included in the protection scope of the present utility model. The use of directions such as up, down, front, back, left, and right in the present utility model is only for the convenience of clear description and does not limit the technical solution of the present utility model.

[0011] As Figures 1-3 shown, a spline positioning internal expansion turning tooling of the present utility model includes a machine tool connection flange 1. A transition flange 2 is coaxially connected to the right side of the machine tool connection flange 1. A spline mandrel 3 is coaxially connected to the right side of the transition flange 2. A tension sleeve 4 is formed by the right end of the spline mandrel 3 extending to the right. A tension hole is arranged along the axis in the right end face of the tension sleeve 4. A tension shaft 5 is arranged in the tension hole. A positioning sleeve 6 is coaxially sleeved on the tension sleeve 4. The right end face of the positioning sleeve 6 is located to the left of the right end face of the tension sleeve 4. A gap is arranged between the inner circumferential surface of the positioning sleeve 6 and the outer circumferential surface of the tension sleeve 4.

[0012] Further, four semi-circular adjusting blocks 7 are arranged at intervals along the circumferential direction on the machine tool connection flange 1. An adjusting bolt is connected to each of any one of the semi-circular adjusting blocks 7. The semi-circular adjusting blocks 7 are in contact with the transition flange 2. By adjusting the bolts, the radial runout of the tooling can be adjusted using the four-jaw principle.

[0013] Specifically, the machine tool connection flange 1, the spline mandrel 3, the tension sleeve 4, the adjusting bolts, etc. in this embodiment all adopt well-known solutions in the prior art, which are already understood by those skilled in the art and will not be elaborated here.

[0014] The working principle of this embodiment: This tooling is connected to the machine tool through the machine tool connection flange 1. The workpiece 8 is clamped on the spline mandrel 3, and the tension sleeve 4 is sleeved. The right end face of the positioning sleeve 6 is in contact with the bottom plane of the bowl of the workpiece 8 to ensure the precise positioning of the workpiece 8 in the length direction. The tailstock center of the machine tool is used to press tightly the tension shaft 5, and the tension sleeve 4 expands and tightly fits the inner hole of the workpiece 8 to tension the workpiece 8, realizing the stable clamping of the workpiece 8, so that the workpiece 8 maintains high stability and positioning accuracy during the processing, improving the processing quality and efficiency of the workpiece.

Claims

1. A spline positioning internal expansion turning tool, characterized in that: It includes a machine tool connecting flange, the right side of which is coaxially connected to a transition flange, the right side of which is coaxially connected to a spline core shaft, the right end of the spline core shaft extends to the right to form a tensioning sleeve, a tensioning hole is arranged along the axis in the right end face of the tensioning sleeve, a tensioning shaft is arranged in the tensioning hole, a positioning sleeve is coaxially arranged on the tensioning sleeve, the right end face of the positioning sleeve is located to the left of the right end face of the tensioning sleeve, and a gap is arranged between the inner circumferential surface of the positioning sleeve and the outer circumferential surface of the tensioning sleeve.

2. A spline positioning internal expansion turning tool according to claim 1, characterized in that: Four semicircular adjustment blocks are arranged at intervals along the circumferential direction on the machine tool connection flange, and each of the semicircular adjustment blocks is connected with an adjustment bolt, and the semicircular adjustment blocks are in contact with the transition flange.

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