Dual-purpose tool for screwing studs through interference threads or unthreaded hole and use method thereof

Abstract

The invention discloses a dual-purpose tool for screwing studs through interference threads or an unthreaded hole. The dual-purpose tool is composed of a screw sleeve, a connecting pin, a screw rod and a handle, the handle is arranged at the upper end of the screw rod, the outer portion of the screw rod is movably connected with the screw sleeve through the connecting pin, a threaded hole is formed in the bottom end of the screw sleeve, and the connecting pin and the screw sleeve are in transition fit. The jerk value of the outer circle of the screw sleeve relative to the threaded hole is not larger than 0.5. The roughness value of the surface of the outer circle of the screw sleeve is not smaller than Ra3.2. When the tool is used for screwing the stud through the interference threads, the stud is screwed into the threaded hole of the dual-purpose tool, and the stud is manually screwed into a workpiece to the needed size. When the tool is used for screwing the stud through the unthreaded hole, the handle of the dual-purpose tool is taken down; a standard drill chuck is arranged in a taper hole of a drill machine spindle; the dual-purpose tool is arranged in the standard drill chuck and is screwed tightly; the stud is screwed into the threaded hole of the dual-purpose tool (3E), and the work stroke of a drill machine is adjusted; the rotating speed of the drill machine is adjusted to be between 50 r / min and 100 r / min, and the stud is screwed into the workpiece to the needed size.

Description

technical field [0001] The invention belongs to the technical field of product assembly, and in particular relates to an assembly tool and method for screw piles on interference threads and light holes. Background technique [0002] In the assembly of aero-engine accessories, more than 80% need to use threaded studs at both ends to connect the casing or other parts. The connection methods of the double-headed screw pile and the shell include interference thread and smooth hole upper screw pile. Due to the different connection methods, the assembly process and tooling of these two kinds of screw piles are also different. [0003] The screw pile with interference thread is manually screwed with a special wrench, see figure 1 , the tooling is composed of a handle (1A) and a screw sleeve (2A). When assembling, place the workpiece 4A on the platform. After selecting the interference screw pile group, screw the ordinary threaded end of the screw pile (3A) into In the threaded ho...

AI Technical Summary

Problems solved by technology

[0003] The screw pile with interference thread is manually screwed with a special wrench, see figure 1 , the tooling is composed of a handle (1A) and a screw sleeve (2A). When assembling, place the workpiece 4A on the platform. After selecting the interference screw pile group, screw the ordinary threaded end of the screw pile (3A) into In the threaded hole of the tooling, use the tooling to screw the screw pile into the workpiece (4A) to the size; in actual production, the threaded hole of the tooling is often damaged due to frequent use, and the whole set of tooling is scrapped

[0004] However, due to the large torque required for the screw pile on the light hole, a special tool is used to install the screw pile on the drilling machine, see figure 2 , the tooling consists of a tapered shank screw (1B), a connecting pin (2B), and a screw sleeve (3B). When assembling, fix the workpiece (5B) on the vise or fixture. First, the tapered shank screw (1B) of the tooling Put it into the Morse taper hole of the main shaft of the drilling machine, and then screw the screw pile (4B) into the threaded hole of the screw sleeve (3B) of the tooling. After adjusting the working stroke, screw the screw pile (4B) at a slow speed while rotating. In the light entrance hole; due to the different sizes of the Morse taper hole of the drilling machine spindle, different drilling machine tapers need to be equipped with different tooling, which greatly affects the production preparation and arrangement

[0005] Therefore, in the production process, for workpieces with these two screw pile methods, different process equipment must be prepared according to the type of double-ended screw pile. When there are many specifications of threads and many types of drilling machines, the required process equipment is corresponding More, resulting in long production preparation cycle and high cost, affecting production efficiency

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