Bushing press-fitting inspection device, method, and program, and bushing press-fitting apparatus

A bushing press-fitting inspection program for inspecting a press-fitting status of a bushing used in a bushing press-fitting apparatus that, using a press-fitting mechanism, supports a bushing at an end of the bushing press-fitting apparatus and that press-fits, over a certain stroke at a certain load, the bushing into a bushing press-fitting portion formed in part of a structure in a cylindrical shape that is included in a workpiece, the bushing press-fitting inspection program comprising a non-transitory computer readable medium containing computer instructions stored therein for causing a computer to function as:

• setting means for setting, in storage means, a start point lower limit load and a start point upper limit load, which are represented by a relationship between a stroke and a load at the beginning of press-fitting of the bushing that is to be press-fitted using the press-fitting mechanism, and an end point lower limit load and an end point upper limit load, which are represented by a relationship between a stroke and a load at the end of press-fitting of the bushing, as press-fitting conditions;
• input means for, after the press-fitting mechanism begins to operate, inputting an actually measured stroke and an actually measured load corresponding to the actually measured stroke that have been detected by detection means provided in the press-fitting mechanism;
• calculation means for calculating, when the actually measured load corresponding to the actually measured stroke is input by the input means, a region between a line connecting the start point lower limit load to the end point lower limit load and a line connecting the start point upper limit load to the end point upper limit load as the press-fitting conditions;
• comparison means for judging, by performing a comparison, whether or not the actually measured load that corresponds to the actually measured stroke and that has been input by the input means is within the region of the press-fitting conditions calculated by the calculation means;
• and
• output means for, when a result of the comparison performed by the comparison means is that the actually measured load is within or outside the region of the press-fitting conditions, outputting an indication signal to indication means provided in the press-fitting mechanism after receiving a satisfactory-result signal or an unsatisfactory-result signal, respectively, from the comparison means.

A bushing press-fitting inspection method for inspecting a press-fitting status of a bushing used in a bushing press-fitting apparatus that, using a press-fitting mechanism, press-fits, over a certain stroke at a certain load, a bushing into a bushing press-fitting portion, the bushing press-fitting inspection method comprising the steps of controlling a computer for:

• setting, in storage means of the computer, a region between a line connecting a start point lower limit load to a start point upper limit load, which are represented by a relationship between a stroke and a load at the beginning of press-fitting of the bushing that is to be press-fitted using the press-fitting mechanism, and a line connecting an end point lower limit load to an end point upper limit load, which are represented by a relationship between a stroke and a load at the end of press-fitting of the bushing, as press-fitting conditions by using setting means;
• inputting, by using input means of the computer, an actually measured stroke and an actually measured load corresponding to the actually measured stroke that are indicated by the press-fitting mechanism that has begun to operate;
• judging, by performing a comparison using judgment means of the computer, whether or not the actually measured stroke and the actually measured load that have been input by the input means are within the region of the press-fitting conditions stored in the storage means;
• and
• outputting, when a result of the judgment performed using the judgment means is that the actually measured load is outside the region of the press-fitting conditions, an unsatisfactory-result signal to indication means provided in the press-fitting mechanism by using output means of the computer, and, when the actually measured load is within the region of the press-fitting conditions, outputting a satisfactory-result signal to the indication means provided in the press-fitting mechanism by using the output means.