A lathe includes a spindle, an opposite spindle, a tool post, a controller, and a contact-type breakage detector. The controller determines whether the cut-off tool is broken according to a control parameter for controlling at least one of the spindle and the opposite spindle at a first detection timing immediately after the cut-off tool cuts off the bar material while the opposite spindle holds the bar material held by the spindle. The controller determines whether the cut-off tool is broken according to a detection result by the contact-type breakage detector at a second detection timing different from the first detection timing.

A device for processing spectacle lenses has a work chamber, which is accessible by way of an opening and in which a workpiece mount and at least one tool mount are opposite one another and movable relative to one another so that a processing region of a tool held at the tool mount can be brought into processing engagement with a workpiece held at the workpiece mount and in processing engagement can be guided over the workpiece. For recognition of wear at the tool, a sensor equipment with at least one contactlessly operating sensor arrangement is provided and is movable outside the work chamber between a protected rest position and a detecting position. In the detecting position the sensor equipment is constructed to detect at the processing region of the tool held at the tool mount an unacceptable deviation beyond a predetermined amount from a desired geometry.

A method and an automatic system for evaluating the condition of a cutting tool insert in a machine tool comprising an inspection device and a processing software for tool wear evaluation. Such system comprises means for manipulating the cutting tool insert(s), replacing it/them when worn or broken, based on the assessment provided by the post processing software or based on user defined settings.

A wear amount measuring device includes: a light emitting unit configured to emit light on an object to be measured having a wear surface; an imaging unit configured to obtain an image of the object; and a calculation unit configured to calculate a wear amount by specifying a wear surface of the object from the obtained image. A positional relationship between the light emitting unit, the imaging unit, and the object is set such that, when a dummy object to be measured having a wear surface is arranged in place of the object, the light emitting unit and the imaging unit have a specular reflection relationship relative to the wear surface of the dummy object. The calculation unit calculates the wear amount by specifying the wear surface based on a difference in brightness of the image.

A method for detecting and compensating CNC tools being implemented in an electronic device, receives from a detector first parameters and second parameters in respect of a first tool. Such first parameters include at least one of service life, blade break information, and blade chipping information of the first tool, and such second parameters include at least one of length extension information, length wear information, radial wear information, and blade thickness wear information of the first tool. Based on the first parameters, instructions to process the workpiece are transmitted or not. Upon receiving the second parameters, instructions to adjust operation of the first tool are transmitted, to compensate for deterioration in normal use.

An automated apparatus for grinding an ice blade on an ice skate comprises a processor, an input device in communication with said processor, a skate holder, a non-contact measuring device in communication with said processor, and a grinding device in communication with said processor. The input device permits a user to select an ice blade grinding option. The skate holder releasably holds at least one said ice skate to said apparatus. The non-contact measuring device is configured to measure a three-dimensional (3D) shape of said ice blade. The grinding device is configured to perform a grinding action on said ice blade in said holder based on said selected ice blade grinding option to change said 3D shape of said ice blade to a desired 3D shape.

Provided herein are a numerical control mechanism, a tool replacement equipment and a tool replacement method, which are used for disassembling a first tool and preparing a second tool according to a tool replacement task and replacing the first tool with a second tool, so as to realize automatic tool replacement, reduce manpower and machine waiting time for the tool replacement, and improve the tool replacement efficiency.

An ice blade measuring system comprises a holder for holding an ice blade in a measurement position, and a non-contact measuring device operationally positioned relative to the holder to measure at least a three-dimensional (3D) shape of an ice contacting surface of the ice blade held in the holder. The non-contact measuring device is configured to create a dataset which corresponds to the measured 3D shape. The system further comprises a data storage means operatively connected to the non-contact measuring device to record the measured dataset.

This machine tool has a tool changing device, and sequentially changes tools to machine a workpiece. The machine tool comprises: an input unit which receives a machining program output from a CAM system and tool basic data; a storage unit which stores the tool basic data received from the input unit for each tool number; a tool measuring device which measures the size of a tool loaded into a tool magazine of the tool changing device; and a determination unit which compares the tool basic data stored in the storage unit and the actual data measured by the measuring device, and determines that the measured tool is different from a desired tool if the difference between the two tool sizes is beyond a preset allowable range.

An automatic lathe includes a positioning block that positions a rod material, the rod material projecting from a main spindle contacting the positioning block, and a sensor that moves in a direction intersecting with a shaft center C direction of the main spindle to detect a cut off condition of the rod material. The positioning block includes a groove that allows movement of the sensor, and moves in the same direction as a movement direction of the sensor between a position that contacts the rod material and a position that has no contact with the rod material. The sensor moves along the path in the position that has no contact with the rod material.