A device for assisting an operator of a boring instrument having a penetrating element for penetration a work surface that includes a retention member adapted to be connected to a rotating element of the boring instrument and adapted to receive a laser and a plurality of mirrors including a beam splitting alignment mirrors that directs a laser beam in a direction parallel with a penetrating element and perpendicular to a work surface, and a depth indication mirror that reflects a light beam at an angle of less than 90 degrees from said retaining member to a location on said work surface wherein the location of the beams from the alignment beams is maintained at a fixed radial position when the retention member perpendicularly moves towards a work surface and wherein the beam is rotated defines a circle.

The disclosure relates to a technical field of deep hole machining, particularly to a deep hole machining on-line deviating correction device based on laser detection, which solves the prior art problem of difficulty in the real-time, on-line detection and deviating correction in the process of deep hole machining. The device comprises a deep hole cutter and a cutter bar, and arranged on the cutter bar are a laser orientating block, a pyramid prism seat, the deep hole cutter and a metallic block with a heating device arranged therein. A beam emitted by a laser transmitter is orientated by the laser orientating block so as to be incident in parallel with the axis of the cutter bar, and then through a pyramid prism to form a return beam which reaches the photosensitive sensor. The advantages of the disclosure lie in that skewing of the deep hole cutter can be detected in time and skewing correction of the deep hole tool is achieved based on the heat expansion and cold contraction mechanism, and therefore the straightness and position accuracy during deep hole machining are improved.

A laser-transmitting machining tool is disclosed. The laser-transmitting machining tool has a plurality of faces including an entrance face, a rake face, a flank face connected to the rake face, a rake side face extending between the entrance face and the rake face, and a flank side face extending between the entrance face and the flank face. The connection of the rake face to the flank face defines a cutting edge. The rake face extends away from the rake side face to define a rake angle. The entrance face is configured to receive and refract a laser beam to the rake face, the flank face, and the cutting edge for causing the laser beam to refract into and heat the workpiece at a compression region extending proximate at least the rake face and a tensile region extending proximate the flank face.

A method involves processing multiple workpieces, each composed of a material with a machinable surface characterized by distinct compressive and tensile regions. In at least one workpiece, the compressive region exhibits greater strength than the tensile region, while in at least one other workpiece, the tensile region is stronger than the compressive region. The method includes selecting a workpiece from this group, ensuring that the chosen workpiece is made of a material different from at least one of the other workpieces. A set of opto-mechanical tools is prepared, and from this set, a tool is selected based on its rake angle, specifically choosing a tool with a midrange rake angle between approximately 136 and 165. This selected tool is used to machine the chosen workpiece.