Lathe fixture suitable for ultra-long thin-wall special-shaped titanium alloy pipe fitting

Abstract

The lathe fixture comprises at least two clamping blocks and a spring piece connected between the clamping blocks, the clamping blocks and the spring piece are mutually connected to form the annular lathe fixture, the inner surface of the lathe fixture is used for being matched with the ultra-long special-shaped titanium alloy thin-wall pipe fitting to be clamped, and the outer surface of the lathe fixture is used for being matched with the ultra-long special-shaped titanium alloy thin-wall pipe fitting to be clamped. The outer surface of the lathe clamp is used for being matched with a movable clamping jaw of a lathe, and the spring piece can stretch out and draw back in the circumferential direction of the lathe clamp so as to adjust the radial position of the clamping block. According to the clamping device, the situation that a thin-walled tube workpiece deforms under the action of assembly stress can be avoided, and the problems that indentation and flattening deformation are generated on the outer circle surface of the workpiece due to the radial clamping force of the movable clamping jaw are solved. In addition, the lathe fixture has certain applicability to the ultra-long special-shaped titanium alloy thin-wall pipe fittings within a certain size range, so that the production cost of the ultra-long special-shaped titanium alloy thin-wall pipe fittings can be reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the field of lathe processing auxiliary parts, in particular to a lathe fixture suitable for super-long thin-walled special-shaped titanium alloy pipe parts. Background technique [0002] CNC machine tools are mechatronic products that integrate many technologies such as machinery, electricity, hydraulic pressure, pneumatics, microelectronics and information. mother machine. CNC lathe is one of the main varieties of CNC machine tools, and it occupies a very important position in CNC machine tools. [0003] In the CNC lathes in the prior art, the most commonly used clamping scheme when turning heavy and long shaft workpieces is "one clamp and one top", that is, one end of the shaft workpiece is supported by movable jaws, and the other end is topped by the rear apex. In this way, the workpiece can be more stable during the turning process, so that it can be processed with a larger cutting amount and improve the processing effic...

AI Technical Summary

Problems solved by technology

[0004] However, when the "one clamp and one top" clamping scheme is adopted for a long thin-walled tube workpiece, the degree of freedom of the clamping end of the thin-walled tube workpiece is zero. assembly stress

However, if the workpiece is turned in the presence of assembly stress, when the workpiece is turned and unloaded from the lathe, the assembly stress is released and the workpiece is easily deformed, especially when the workpiece itself is bent to a certain extent. The deformation of the workpiece will be more serious, which seriously affects the turning quality and precision of the workpiece

[0005] In addition, for long or super-long special-shaped titanium alloy thin-walled tube workpieces, when the clamping scheme of one clamp and one top is used, the movable jaws at the clamping end are in direct contact with the outer surface of the workpiece, and under the action of the radial clamping force of the movable jaws, Under the condition, the outer surface of the workpiece is prone to indentation

At the same time, the large radial clamping force can easily cause the thin-walled tube to be flattened and deformed, especially for special-shaped workpieces with varying inner or outer diameters, which will seriously affect the processing quality of the workpiece due to the uneven stress distribution.

[0006] In addition, due to the large number of thin-walled tube workpieces, when it is necessary to include the lathe processing of "ultra-long special-shaped titanium alloy thin-walled tube workpieces", there are also size differences between different batches of blanks under the same specification. Customizing the corresponding fixtures for thin-walled pipe workpieces of different models and batches will lead to an increase in the production cost of thin-walled pipe fittings, and it is time-consuming and laborious to find the corresponding work fixtures for each clamping

[0007] Therefore, there is an urgent need for a special tooling fixture for lathes, which is used to clamp ultra-long special-shaped titanium alloy thin-walled tube workpieces with variable diameters, so as to solve the workpiece deformation caused by assembly stress and the radial clamping of movable jaws. The force causes indentation and flattening of the outer surface of the workpiece

Images