Work positioning method, and positioning device

A work positioning method comprising a main positioning means and an auxiliary positioning means placed to protrude on a reference plane to determine a position of the work by inserting the main positioning means into a main positioning hole formed in the work and inserting the auxiliary positioning means into an auxiliary positioning hole formed in the work,

• wherein the main positioning means includes a main positioning insert part having a circular outer peripheral shape to be inserted in the main positioning hole,
• the auxiliary positioning means includes:
• a base block member formed with at least two first smooth surfaces opposing each other and parallel with a straight line joining the main positioning means and the auxiliary positioning means;
• and
• an auxiliary positioning insert part provided, in an inner surface, with second smooth surfaces contacting with the first smooth surfaces of the base block member, the auxiliary positioning insert part having a circular outer peripheral shape to be inserted into the auxiliary positioning hole,
• wherein when the work is to be positioned,
• the main positioning insert part of the main positioning means is inserted into the main positioning hole, and
• the auxiliary positioning insert part of the auxiliary positioning means is guided by the first smooth surfaces to move on the straight line to absorb a pitch error between the main positioning hole and the auxiliary positioning hole, and the auxiliary positioning insert part is inserted into the auxiliary positioning hole.

A work positioning device comprising, on a reference plane, a main positioning means to be inserted into a main positioning hole formed in a work and an auxiliary positioning means to be inserted into an auxiliary positioning hole formed in the work,

• wherein
• the main positioning means includes a main positioning insert part having a circular outer peripheral shape to be formed in the main positioning hole,
• the auxiliary positioning means includes:
• a base block member formed with at least two first smooth surfaces opposing each other and parallel with a straight line joining the main positioning means and the auxiliary positioning means;
• a sliding part provided with second smooth surfaces formed in correspondence with the first smooth surfaces of the base block member and in parallel with the straight line, the sliding part being guided by the first smooth surfaces to move on the straight line;
• and
• an auxiliary positioning insert part provided above the sliding part, the auxiliary positioning insert part having a circular outer peripheral shape to be inserted into the auxiliary positioning hole.

A work positioning device comprising, on a reference plane, a main positioning means to be inserted into a main positioning hole formed in a work and an auxiliary positioning means to be inserted into an auxiliary positioning hole formed in the work,

• wherein
• the main positioning means includes a main positioning insert part having a circular outer peripheral shape to be formed in the main positioning hole,
• the auxiliary positioning means includes:
• a base block member formed with at least two first smooth surfaces opposing each other and parallel with a straight line joining the main positioning means and the auxiliary positioning means;
• and
• an auxiliary positioning insert part having a circular outer peripheral shape and formed, in an inner surface, with second smooth surfaces contacting with the first smooth surfaces of the base block member so that the auxiliary positioning insert part can be guided by the first smooth surfaces to move on the straight line when the auxiliary positioning insert part is inserted into the auxiliary positioning hole.