Toyota Jidosha Kabushiki Kaisha

Sumitomo Electric Industries, Limited

Kabushiki Kaisha Toyota Chuo Kenkyusho

Akio Asai

Kazunari Kirii

Masahiro Hayashi

Takatoshi Suzuki

Kimikazu Ikemoto

Kazutaka Ogo

Kazuki Watanabe

Masatoki Utsumi

Yuji Niimi

Yukito Ando

Hideki Kamogawa

Takayuki Tsuruhashi

Katsuiku Hokao

Mamoru Toyoda

Kazuhiro Totsuka

Ryoji Yoshinaka

Yutaka Nishimoto

Masao Kishi

A cleaning apparatus for removing foreign matters from workpieces in the form of strips or sheets cut from a larger blank, before the workpiece is subjected to a press forming operation, which apparatus includes a feeding device for feeding the successive workpieces, de-oiling rolls disposed in an upstream portion of a feed path of the workpieces as seen in a feeding direction and rotated in pressing rolling contact with the surfaces of each workpiece as each workpiece is fed, so as to remove by absorption oily substances from the surfaces of the workpiece, and tacky rolls disposed downstream of the de-oiling rolls as seen in the feeding direction and rotated in pressing rolling contact with the surfaces of the workpiece, so as to remove by tackiness thereof the foreign matters from the surfaces of the workpiece.

Apparatus for cleaning strips before press forming, having de-oiling

It is profitable to oscillate a beam on objects when a high power CO.sub.2 laser beam or a high power YAG laser beam welds or anneals the objects. In order to let a laser beam scan, a device for reciprocating a lens or a device for rotating two mirrors synchronously has been proposed. These devices suffer from the difficulty of cooling. Prior devices are not applicable to a high power laser. A parallel laser beam is first reflected by a parabolic mirror. Then a mirror which is reciprocally swaying by a galvanometer reflects the beam toward the objects. A water inlet and an outlet are mounted on a rear surface of the swaying mirror. Cooling water is carried out through coiled tubes. Excellent heat diffusion prevents the galvanometer from malfunction.

Laser beam scanner

A high speed machining controller comprises an acoustic emission sensor which is installed in or near a machine for machining a work piece in a high speed and which detects acoustic emission generated during machining a work piece; a signal processing means which is composed of a band-pass filter for passing an element of a frequency band corresponding to the acoustic emission by inputting a signal outputted from the acoustic emission sensor, a rectification circuit for rectifying a signal outputted from said band-pass filter, a peak detection circuit for detecting peak values of the signal outputted from the rectification circuit, and a smoothing circuit for smoothing output signals of said peak detection circuit and for outputting a signal corresponding to the amplitude of the acoustic emission for the purpose of processing the output signal of the acoustic emission sensor to detect its amplitude; a cutting condition discrimination means for judging the cutting condition of a work piece by comparing a detected amplitude of the acoustic emission with a predetermined discrimination value for discriminating the cutting condition of said work piece; and a control means to instruct and control the machining condition including at least the feed speed of a machine tool on the basis of the cutting condition of the work piece.

High-speed machining controller

A method of and apparatus for controlling forming press conditions aids in maintaining stability in a mechanical double action press forming provided with an upper die (inner) and an outer ram (outer). These dies are driven independently wherein press conditions related to the forming process, such as a hydraulic pressure and pneumatic pressure, are automatically corrected by feedback so as to be maintained to preset values corresponding to the change of the inner stroke during the forming process. Abnormal operation can also be detected and corrected immediately by detecting the change of the press conditions during the forming process continuously or intermittently.

Method of and apparatus for controlling forming press conditions

An apparatus for controlling dynamic characteristics of an outer load includes a crank angle detecting device which detects a crank angle and an outer load detecting device which detects the outer load, output signals of the two detecting devices are input to a controlled hydraulic pressure correcting device in which an ideal value of outer load corresponding to the crank angle has been preset, a deflection rate between the detected outer load and the ideal value of outer load is judged in accordance with the detected crank angle and, each time that the deflection exceeds a predetermined range, the output of a hydraulic source for setting a balanced pressure is controlled so as to adjust the balanced pressure.

Apparatus for controlling dynamic characteristics of outer load

An apparatus, for controlling dynamic characteristics of a press load, facilitates changing the balance between a hydraulic pressure and a pneumatic pressure in a hydroblank holder, wherein a first pneumatic device which supplies a standard pneumatic pressure with which a predetermined dynamic load can be obtained and a second pneumatic device which supplies a pneumatic pressure higher or lower than the standard pneumatic pressure are provided in parallel in a pneumatic device which supplies pneumatic pressure to the hydroblank holder and the first and second pneumatic devices are switched in accordance with a press stroke and, when the switching is made to low pressure, an accumulator is depressurized by the operation of a depressurizing device.

Apparatus for controlling dynamic characteristics of press load

Growing community of inventors

Aichi, Japan

Akio Asai