Sanyo Machine Works, Ltd.

Toyota Jidosha Kabushiki Kaisha

Subaru Corporation

Hisashi Ryota

Masahiro Tasaka

Masazumi Miyago

Kohtaro Urata

Makoto Ashikaga

Shigenori Onishi

Shiro Ando

A control systemfor a tightener (nut runner) of the present invention includes a marker M provided on the tightener, a camera() that remotely images the marker M and detects a position of the tightener, and a controller that stores a target tightening torque value of a plurality of tightened members (bolts B) together with position information of the tightened members, and sets a tightening torque value of the tightener for each of the tightened members to be tightened by the tightener on the basis of the position of the tightener detected by the camera.

Nut runner control system has a tightener that is provided with marker and camera remotely images the marker to detect position of the tightener

A screw fastening apparatus for fastening a screw member having a bearing surface with respect to a member to be fastened by rotating the screw member from a theoretical seating point to a target rotational angle, including a rotational angle sensor which senses rotational angle values of the screw member for fastening the screw member, a torque detector which detects torque values for fastening the screw member, a torque value difference detector which detects a plurality of torque value differences, each of the torque value differences is a difference of the torque values detected at intervals of a constant rotational angle, a slip detector which detects a slip of the screw member with respect to the member to be fastened, from an average of the torque value differences, and a screw fastening discontinuing unit which instructs to discontinue the screw fastening when the slip is detected by the slip detector.

Screw fastening device and screw fastening method

A control method according to an aspect of the invention includes a process for setting target fastening torque, a pulse interval of neighboring pulses, and an elevated value of torque per pulse, detecting last fastening torque at an Nth pulse (N is a natural number of 1 or more) after seating of a fastening member, setting pulse loading time at an N+1th pulse and pulse strength at the N+1th pulse based on the last fastening torque at the Nth pulse so that fastening torque at the N+1th pulse coincides with a multiple of the elevated value, controlling a fastening tool based on the pulse interval, the pulse loading time, and the pulse strength so that last fastening torque at an N+Mth pulse (M is a natural number of 1 or more) reaches target fastening torque.

Control device, control method, and control program

Growing community of inventors

Aichi, Japan

Hisashi Ryota