Electric heating – Metal heating – Cutting or disintegrating
Patent
1989-09-21
1991-06-25
Evans, Geoffrey S.
Electric heating
Metal heating
Cutting or disintegrating
219 6912, B23Q 534, B23H 702
Patent
active
050269615
ABSTRACT:
A feed apparatus includes first guides disposed between a base and a first slide to guide the first slide on the base along a first axis, second guides disposed between the first slide and a second slide to guide the second slide on the first slide along a second axis at a right angle to the first axis, a first adjustment bolt disposed on the base to impart a preliminary pressure to the first guides, and a second adjustment bolt disposed on the second slide to impart a preliminary pressure to the second guides. Upon imposing the preliminary pressure on the first and second guides, bending transformations are caused in the base and the second slide, but no bending transformation occurs in the first slide, thereby both guides can allow both slides to be smoothly moved. The feed apparatus further includes first and second drive units attached to the base and the second slide, respectively, and first and second nuts secured to the first slide and engaged with first and second lead screws connected with both drive units. Both nuts may be positioned closer on the first slide in such a manner that both lead screws do not interfere with each other and also the thickness of the second slide may decrease to the thickness required to attach the second drive unit alone, so that the whole size and weight of the feed apparatus can be made small and light enough to accomplish accurate feed movement.
REFERENCES:
patent: 3731043 (1973-05-01), Ullmann et al.
patent: 4460816 (1984-07-01), Bonga
patent: 4461942 (1984-07-01), Delpretti
patent: 4663509 (1987-05-01), Kawashima
patent: 4733041 (1988-03-01), Obara
Kawanabe Tasuku
Watanabe Toshiya
Brother Kogyo Kabushiki Kaisha
Evans Geoffrey S.
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