Eyeglass lens processing machine and control program for the eyeglass lens processing machine

Abstract

This reduces the negative effects associated with small lens fragments being ejected from eyeglass lens processing equipment. [Solution] The system includes a cutting tool that cuts off lens fragments by cutting the eyeglass lens, a data acquisition means for acquiring lens shape data, and a control means. The control means performs a first rough machining step in which the periphery of the eyeglass lens is roughly machined with the cutting tool using a first rough machining trajectory determined based on the lens shape data, and a pre-machining step in which, prior to the first rough machining step, a pre-machining trajectory different from the first rough machining trajectory is determined in an area set outside the first rough machining trajectory so as not to generate lens fragments of a predetermined size or smaller, and the periphery of the eyeglass lens is pre-machined with the tool using the pre-machining trajectory.

Claims

1. An eyeglass lens processing apparatus for processing the periphery of an eyeglass lens based on its shape, A processing tool for processing the periphery of an eyeglass lens, which includes a cutting tool that cuts off lens fragments by cutting the eyeglass lens, A data acquisition means for acquiring the aforementioned spherical data, Equipped with control means, The control means is A first rough machining step in which the periphery of the spectacle lens is roughly machined with the cutting tool using a first rough machining trajectory determined based on the aforementioned lens shape data, Prior to the first rough machining step, a pre-machining step is performed in which a pre-machining trajectory different from the first rough machining trajectory is defined in an area set outside the first rough machining trajectory so as not to generate lens fragments of a predetermined size or smaller, and the periphery of the spectacle lens is pre-machined using the machining tool along the pre-machining trajectory. An eyeglass lens processing apparatus characterized by performing the following actions.

2. In the eyeglass lens processing apparatus of claim 1, The data acquisition means acquires the lens shape of an unprocessed eyeglass lens, The spectacle lens processing apparatus is characterized in that the control means determines, based at least the lens outer shape data and the first rough processing trajectory, whether or not lens fragments of a predetermined size or smaller may be generated for each lens fragment that is cut off when the first rough processing step is performed, and if it is determined that lens fragments of a predetermined size or smaller may be generated, the area where the determined lens fragments are generated is set as an area to be pre-processed in the pre-processing step.

3. In the eyeglass lens processing apparatus of claim 2, The spectacle lens processing apparatus is characterized in that the control means determines whether or not lens fragments of a predetermined size or smaller can be generated based on the maximum width in a predetermined direction of each lens fragment generated when a spectacle lens is processed in the first rough processing trajectory.

4. In the eyeglass lens processing apparatus of claim 2 or 3, The spectacle lens processing apparatus is characterized in that the control means identifies lens fragments to be cut off when the first rough machining step is performed, based on at least the lens outer shape data and the first rough machining trajectory, estimates the maximum width in a predetermined direction for each identified lens fragment based on the lens outer shape data and the first rough machining trajectory, and determines whether or not lens fragments smaller than the predetermined size can be generated by comparing the estimated maximum width with the predetermined size.

5. In an eyeglass lens processing apparatus according to any one of claims 2 to 4, The spectacle lens processing apparatus is characterized in that, if the control means determines that no lens fragments of a predetermined size or smaller can be generated, it performs the first rough processing step without performing the pre-processing step to roughly process the periphery of the spectacle lens.

6. In an eyeglass lens processing apparatus according to any one of claims 1 to 5, The system includes a means for changing the positional relationship between the cutting tool and the eyeglass lens, The spectacle lens processing apparatus is characterized in that the control means executes the pre-processing step by controlling the modification means based on the pre-processing trajectory, and executes the first rough processing step by controlling the modification means based on the first rough processing trajectory.

7. In an eyeglass lens processing apparatus according to any one of claims 1 to 6, The discharge path for processing waste discharged from the aforementioned spectacle lens processing apparatus is equipped with a processing waste separation device that separates lens fragments of a predetermined size from the processing waste generated by rough processing by the cutting tool. The spectacle lens processing apparatus is characterized in that the predetermined size of the lens fragment is set based on the size of the lens fragment separated by the processing waste separation device.

8. In an eyeglass lens processing apparatus according to any one of claims 1 to 7, An eyeglass lens processing apparatus characterized by comprising a fragment size setting means for setting the predetermined size of lens fragments to be changeable.

9. A control program for an eyeglass lens processing apparatus, comprising a cutting tool for rough processing the periphery of an eyeglass lens, the apparatus including a cutting tool that cuts off lens fragments by cutting the eyeglass lens, and processing the periphery of the eyeglass lens with the said tool based on the lens shape, A first rough machining step in which the periphery of the spectacle lens is roughly machined with the cutting tool using a first rough machining trajectory determined based on the aforementioned lens shape, Prior to the first rough machining step, a pre-machining step is performed in which the periphery of the spectacle lens is pre-machined with the machining tool using a pre-machining trajectory different from the first rough machining trajectory, in an area set outside the first rough machining trajectory, so as to prevent the generation of lens fragments of a predetermined size or smaller. A control program for an eyeglass lens processing apparatus, characterized by causing the control unit of the eyeglass lens processing apparatus to execute a command.

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