High-precision large-diameter servo feed tapping power head

Abstract

The invention relates to a high-precision, large-diameter and servo-feeding tapping power head and belongs to the technical field of electric tapping tools. The high-precision, large-diameter and servo-feeding tapping power head comprises a transmission control box, a transmission box fixing seat, a transmission box, a spline shaft, a spline shaft drive mechanism, a workpiece tapping mechanism, a travel control mechanism and a transition transmission mechanism and is characterized in that the workpiece tapping mechanism comprises a shaft sleeve, a cutter bar shaft, a shaft sleeve guide slide seat, a ring oiler and a spline sleeve; the travel control mechanism comprises a screw, a slide rack, a screw gear, a signal collector rack, a first signal collector and a second signal collector, a slide rack rigid support mechanism is fixed on the slide rack and comprises a slider, an upper clamp block and a lower clamp block, a slide groove is formed in one side of the slider, the edge part of the slide rack is inserted into a slide rack matching cavity, a guide rail is fixed on the front cavity wall of the cavity of the transmission control box, and the slide groove is matched with the guide rail. The high-precision, large-diameter and servo-feeding tapping power head has the advantages that stability is increased, the large-diameter tapping requirements of workpieces are satisfied, convenience in manufacturing, assembling, application and maintenance is achieved, transition links are reduced, and simple structure is achieved.

Description

technical field [0001] The invention belongs to the technical field of electric tapping tools, and specifically relates to a high-precision large-diameter servo feed tapping power head, which is matched with a tapping machine tool or similar equipment to process required internal thread holes on metal workpieces. Background technique [0002] The technical information about the tapping power head can be seen in the open Chinese patent literature, such as CN202825375U recommends "automatic feed drilling and tapping device", typical "a kind of automatic tapping power" provided by the authorized announcement number CN201350535Y Head mechanism", the patent scheme installs the cylinder on the bracket and the push rod connected with the piston rod of the cylinder and parallel to the rotating spindle. In the category of pneumatic tapping power head device, the so-called pneumatic tapping power head device means that the displacement of the piston rod is controlled by the piston rod...

AI Technical Summary

Problems solved by technology

[0004] But the above-mentioned CN103317376A still has the following defects: First, because the upper end face of the axle sleeve (the patent is called the outer sleeve, hereinafter the same) is immovably fixed on the bottom of the transmission control box, the lower end is formed as a lengthy longitudinal cantilever end, and A sliding sleeve is fitted at the lower end in the form of threaded connection, and an inner sleeve that slides and fits with the sliding sleeve is set in the shaft sleeve cavity of the shaft sleeve (patent called the outer sleeve cavity), and is set in the inner sleeve cavity of the inner sleeve. The bearing positioning spacer is provided with a tool bar shaft that can move up and down at the central position corresponding to the bearing positioning spacer. Therefore, on the one hand, the structure of the entire workpiece tapping mechanism becomes very complicated, which brings confusion to manufacturing and assembly. On the one hand, it is difficult to maintain the stability of the up and down movement of the tool bar shaft, which ultimately affects the tapping quality of the tapping tool on the workpiece; The technical effect brought about by the rigid fit relationship between the sliding frame and the transmission control box constructed by the cooperation of a pair of guide rails on the cavity wall of the transmission control box cavity of the transmission control box cannot meet expectations, so the smooth movement of the sliding frame up and down and the The desired rigidity requirements are not really reflected; thirdly, since the end of the sliding frame facing the spline shaft is provided with a clamp ring, the clamp ring locks the spline bushing matched with the spline shaft, and when the sliding frame moves up and down, it passes The clamp ring drives the spline shaft sleeve, and the disc-shaped sleeve connector expanded at the lower end of the spline shaft sleeve drives the tool bar shaft to move up and down step by step, so the action of the sliding frame on the tool bar shaft is indirect. On the one hand, the force is affected, on the other hand, it is difficult to ensure the clamping effect of the clamp ring on the upper end of the spline bushing, and there is a risk of loosening or even breaking free

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