Frequency conversion stepless speed variation cylindrical vertical drill capable of precisely controlling drill depth

Abstract

The invention discloses a frequency conversion stepless speed governing cylindrical vertical drill capable of precisely controlling drill depth. The vertical drill comprises a base, a stand column with a rack, a frequency conversion motor, a spindle box and a PLC control system. A spindle is arranged in the spindle box, the outer portion of the spindle is provided with a spindle sleeve with a rack, a speed adjusting gear shifting mechanism, a horizontal shaft mechanism, a feeding micro adjusting speed changing mechanism and a magnetic grid mechanism are arranged in the spindle box, a worktablelifting mechanism is arranged on the stand column fixedly arranged, and a key type operation panel is arranged on the front face of the spindle box and is electrically connected with the PLC controlsystem. The cylindrical vertical drill can improve the machining precision, particularly the spindle (Z shaft) fixed stroke precision can be smaller than or equal to 0.04 mm, kinetic energy is available, the cost is low, use is safer and sanitary, meanwhile, maintaining is facilitated, and the machine tool property is greatly improved.

Description

technical field [0001] The invention relates to the technical field of vertical drilling machines, in particular to a frequency conversion stepless speed regulation cylindrical vertical drill capable of precisely controlling the drilling depth. Background technique [0002] Most of the common vertical drilling machines on the market are of traditional structure, and the main transmission is mostly a belt pulley or a gear with stepped transmission. Small and medium-sized vertical drilling machines also have wide belt stepless speed regulation. Except for the manual feed of small-sized vertical drills, the main shaft feed mechanism is gear step change and lever, side gear clutch to control the start and stop of feed movement, and the drilling depth control is to observe the dial on the horizontal axis or A ruler that moves synchronously with the spindle. Most of the lifting of the workbench is a rack-type manual lifting. [0003] The vertical drill with this structure is lab...

AI Technical Summary

Problems solved by technology

[0003] The vertical drill with this structure is laborious and cumbersome to operate, and it is difficult to improve the work efficiency. The precision of drilling depth control is very poor (skilled workers can only reach 0.3-0.5mm). In addition to conventional drilling and manual tapping, It is impossible to complete some milling work with small cuts. When this type of drilling machine is cutting, the cutting fluid splashes, chips radiate or entangle the drill bit, which affects safety and health.

This kind of vertical drill is really cheap and not beautiful, and it is difficult to expand in foreign markets.

The numerical control products developed later have good performance and precision, but the price is too expensive, and the requirements for operators are also higher, so it is not suitable for single-piece, small-batch production occasions and mechanical repair and other enterprises.

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