Finish turning inner hole tool for conical thin-wall shell

Abstract

The utility model relates to an inner hole finish turning tool for a conical thin-wall shell, which comprises a sleeve, sleeve sealing plates and a workpiece, the sleeve is sleeved outside the workpiece, an annular cavity is arranged between the sleeve and the workpiece, two ends of the annular cavity are sealed by the sleeve sealing plates, the annular cavity is uniformly divided into a plurality of fan-shaped filling cavities by a plurality of nylon strips, and the fan-shaped filling cavities are communicated with the sleeve sealing plates. The fan-shaped filling cavity is filled with filler, the nylon strip is bonded to the outer surface of the workpiece, and the outer surface of the nylon strip is attached to the inner wall of the sleeve. The annular cavity between the workpiece and the sleeve is evenly divided into a plurality of fan-shaped filling cavities through the nylon strips, the functions of consolidating the shell taper and preventing a sand layer from moving in the machining process are achieved, machining deformation is reduced, the machining quality is improved, the cutter vibration phenomenon is avoided, and the surface quality of an inner hole is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of thin-walled parts processing, in particular to a tool for finishing inner holes of a tapered thin-walled shell. Background Art

[0002] Thin-walled shells are difficult to machine, with an outer diameter of 100-400mm, a length of 2-3m, a minimum wall thickness of about 1-2mm, and a wall thickness tolerance of 0.1mm. The overall turning of the inner hole is prone to vibration deformation and chatter marks on the surface, and the machining accuracy and efficiency are not high.

[0003] Patent No. 202222298503.4 discloses a device for preventing long thin-walled shells from vibrating and deforming during machining, comprising a sleeve, a sleeve sealing plate and a support ring. The sleeve is sleeved outside the workpiece, a filling layer is provided between the sleeve and the workpiece, and the filling layer is filled with fillers. Sleeve sealing plates are provided inside both ends of the sleeve, and both ends of the filling layer are sealed by the sleeve sealing plates. A sleeve is provided outside the workpiece to enhance the wall thickness, and sand and sawdust are filled between the sleeve and the workpiece to effectively absorb shock, prevent vibration marks from being generated in the inner hole of the car, and improve machining accuracy. However, this structure has the following defects:

[0004] This tool is only suitable for straight thin-walled shells. For conical thin-walled shells with tapered inner and outer circles, it is very easy to cause uneven filling of fillers, resulting in processing deformation;

[0005] The filler is easy to move during the inner hole turning process, resulting in the tool vibration phenomenon still occurring during the fine turning of the inner hole. Utility Model Content

[0006] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a tool for fine turning the inner hole of a tapered thin-walled shell. The annular cavity between the workpiece and the sleeve is evenly divided into a plurality of fan-shaped filling cavities by nylon strips, which plays a role in consolidating the taper of the shell and preventing the movement of the sand layer during the processing.

[0007] The purpose of the utility model is achieved in this way:

[0008] A tool for finishing the inner hole of a tapered thin-walled shell comprises a sleeve, a sleeve sealing plate and a workpiece, wherein the sleeve is sleeved outside the workpiece, an annular cavity is provided between the sleeve and the workpiece, both ends of the annular cavity are blocked by the sleeve sealing plate, a plurality of nylon strips evenly divide the annular cavity into a plurality of fan-shaped filling cavities, the fan-shaped filling cavities are filled with fillers, the nylon strips are bonded to the outer surface of the workpiece, and the outer surface of the nylon strips is in contact with the inner wall of the sleeve.

[0009] Preferably, the sleeve sealing plate is clamped with the workpiece and the sleeve at the same time, and the connection between the sleeve sealing plate and the workpiece and the connection between the sleeve sealing plate and the sleeve are positioned by stoppers.

[0010] Preferably, the sleeve is connected to the sleeve sealing plate by means of first screws, and the first screws are evenly distributed in the circumference of the sleeve sealing plate.

[0011] Preferably, the sleeve is of split type, consisting of two half sleeves connected into one by a second screw.

[0012] Preferably, the filler is sand.

[0013] The beneficial effects of the utility model are:

[0014] The utility model evenly divides the annular cavity between the workpiece and the sleeve into a plurality of fan-shaped filling cavities through nylon strips, which plays a role in consolidating the taper of the shell and preventing the movement of the sand layer during processing, reduces processing deformation, improves processing quality, avoids tool vibration, and improves the surface quality of the inner hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a structural schematic diagram of a tooling for finishing inner holes of a tapered thin-walled shell.

[0016] Figure 2 for Figure 1 A partial enlarged view of .

[0017] Figure 3 for Figure 1 sectional view of .

[0018] Figure 4 It is a schematic diagram of the installation structure of the utility model.

[0019] Wherein: sleeve 1; half sleeve 1.1; sleeve cover plate 2; workpiece 3; nylon strip 4; filler 5. DETAILED DESCRIPTION

[0020] See also Figure 1-4 The utility model relates to a tool for finishing the inner hole of a tapered thin-walled shell, comprising a sleeve 1, a sleeve sealing plate 2 and a workpiece 3. The sleeve 1 is sleeved outside the workpiece 3, an annular cavity is provided between the sleeve 1 and the workpiece 3, both ends of the annular cavity are blocked by the sleeve sealing plate 2, a plurality of nylon strips 4 evenly divide the annular cavity into a plurality of fan-shaped filling cavities, the fan-shaped filling cavities are filled with fillers 5, the nylon strips 4 are bonded to the outer surface of the workpiece 3, the outer surface of the nylon strips 4 is in contact with the inner wall of the sleeve 1, ensuring that each fan-shaped filling cavity is independent of each other.

[0021] The filler 5 is sand.

[0022] The sleeve sealing plate 2 is clamped with the workpiece 3 and the sleeve 1 at the same time, and the connection between the sleeve sealing plate 2 and the workpiece 3 and the connection between the sleeve sealing plate 2 and the sleeve 1 are positioned by stoppers.

[0023] The sleeve 1 is connected to the sleeve sealing plate 2 by first screws, and the first screws are evenly distributed around the circumference of the sleeve sealing plate 2. The end surface of the sleeve 1 is provided with threaded holes corresponding to the first screws.

[0024] The sleeve 1 is of split type, consisting of two half sleeves 1.1 connected into one by a second screw.

[0025] Nylon strips 4 are pasted on eight equal parts of the outer circumference of the tapered thin-walled shell that has been precision-machined, and the two half sleeves 1.1 are closed and fixed together by a second screw. The inner wall of the sleeve 1 fits against the nylon strip 4, and a plurality of fan-shaped filling cavities are formed between the sleeve 1 and the workpiece 3. The sleeve sealing plate 2 on one side is fixed to the sleeve 1 by a first screw, and the filler 5 (sand) is filled into each fan-shaped filling cavity on the other side. After the filler 5 is filled, the sleeve sealing plate 2 on that side is fixed to the sleeve 1 by the first screw (pay attention to ensure concentricity), and the fine-turning inner hole tooling is installed in this way. The outer circle of the sleeve 1 has no taper, which is convenient for clamping and positioning. When precision-turning the inner hole, it is only necessary to clamp the outer circle of the sleeve. The nylon strip 4 plays a role in consolidating the taper of the shell and preventing the sand layer from moving during processing, thereby improving the processing efficiency of the tapered thin-walled shell.

[0026] In addition to the above embodiments, the present invention also includes other implementation modes. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. A tool for finishing inner holes of a tapered thin-walled shell, comprising a sleeve, a sleeve sealing plate and a workpiece, wherein the sleeve is sleeved outside the workpiece, and is characterized in that: An annular cavity is provided between the sleeve and the workpiece, and both ends of the annular cavity are sealed by sleeve sealing plates. A plurality of nylon strips evenly divide the annular cavity into a plurality of fan-shaped filling cavities, and the fan-shaped filling cavities are filled with fillers. The nylon strips are bonded to the outer surface of the workpiece, and the outer surface of the nylon strips fits the inner wall of the sleeve.

2. The tooling for finishing inner holes of a tapered thin-walled shell according to claim 1, characterized in that: The sleeve sealing plate is clamped with the workpiece and the sleeve at the same time, and the connection between the sleeve sealing plate and the workpiece and the connection between the sleeve sealing plate and the sleeve are positioned by stoppers.

3. A tool for finishing inner holes of a tapered thin-walled shell according to claim 1 or 2, characterized in that: The sleeve is connected to the sleeve sealing plate by first screws, and the first screws are evenly distributed in the circumference of the sleeve sealing plate.

4. The tooling for finishing inner holes of a tapered thin-walled shell according to claim 1, characterized in that: The sleeve is of split type, and is formed into one piece by connecting two half sleeves through a second screw.

5. The tooling for finishing inner holes of a tapered thin-walled shell according to claim 1, characterized in that: The filler is sand.

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