A welding flux for stainless steels consisting of 30-55wt% SiO2, 20-40wt%TiO2, 10-20wt% Cr2O3, 5-20wt% MoO3, 5-10wt% MoS2 and 5-10wt% halide is used in increasing welds penetration and welding efficiency for stainless steels arc welding with or without filler metals.

A welding control apparatus according to the present invention includes an integrator (26) for starting calculation of a voltage error integral value Sv2, expressed by a formula (1) given below, from a time when a first pulse period ends and a second pulse period starts in a pulse cycle, based on various data of information regarding a gradient Ks of an external characteristic of a welding power s...

The invention provides a self-propelled automatic welding machine used for repetitive welding operations, the welding machine having the welding characteristics of initiating self-propelled movement in straight line for flat welding or corner welding along a wall, being capable of stopping a welding operation automatically, and having telescopic and rotary arm structure which can automatically com...

An assembling apparatus configured for assembling a lens into a lens barrel includes a pushing rod, a supporting member, and an elastic element. The pushing rod includes a main body and a pushing portion connected in an end of the main body. The pushing portion is configured for being in contact with the lens and pushing the lens. The supporting member is movably mounted on the pushing portion, en...

The present invention relates to a sucking device. The sucking device is used for sucking optical elements. The sucking device includes a nozzle for sucking the optical element and a movable arm for moving the nozzle. The sucking device further includes a first aligning block and a second aligning block facing the first aligning block. The first aligning block and the second aligning block are for...

A horizontal machine tool (1) comprises a base frame (10) having a workpiece support surface (11c) for supporting a workpiece, an X-axis saddle (20) which is attached to a rear surface (12b) of the base frame (10) so as to slide in right and left hand directions through an X-axis movement mechanism (50), an Y-axis saddle (30) which is attached to the X-axis saddle (20) so as to slide in upward and...

A toggle type with one axial positioning machine can increase positioning precision and decrease the impact from external impact by using the three-links design.

Both shifting rate and positioning precision of a three-link toggle type positioning platform can be increased by using mechanism of three-link concept in this invention.

A linear driving device according to this invention comprises a guide having lids at both ends in the longitudinal direction to form a hollow box configuration of a rectangular parallelepiped shape, and a counter slide riding inside the hollow box configuration. The hollow box configuration has an inner surface that acts as a bearing surface for an air bearing of the counter slide and the guide. T...

The invention relates to a pneumatic and oil hydraulic quick clamp having double clamping holder. A stationary clamping jaw is provided on the top of the main body of the device, and two sides of the stationary clamping jaw are equipped with a first movable clamp and a second movable clamp, wherein actuating pieces can be driven by a lever in sequence so that the first movable clamp and the second...

A knife bar structure includes a pull bar, a sleeve portion, and a locking ring; the sleeve portion is fabricated as a conical sleeve portion suitable for the taper of a main axis sleeve of a machining center and is divided into a sleeve combination portion and a sleeve removal portion. An encircling groove is disposed at the bottom side of the sleeve combination portion, and an interlacing round-...

A multi-axial machining center has a base that is a main axle with a plurality of machining tools which can be clamped. In addition, the base is connected with a driving device that can drive the movement of the base. If users adjust the length of the machining tools, the base will first move to the top of an adjusting block and make each main axis release the machining tools so that the machining...

A retainer ring for chemical mechanical polishing is provided. The retainer ring is suitable for fixing a wafer. The inner wall of the retainer ring is contacted with the wafer, and the total contact length between the inner wall of the retainer ring and the wafer is less than 80% of the circumference of the wafer.

To provide a vane type air motor preventing the uneven wear of a vane. The vane type air motor includes a cylindrical body having a rotor chamber defined by a cylindrical inner circumference surface, and a rotor with a vane. A plurality of air discharge openings 50 are provided over a range of constant length in the axial direction of the rotor chamber, and are disposed so that the air discharge o...

A method for injecting slurry between the wafer and the pad in chemical mechanical polishing of semiconductor wafers comprising a solid crescent shaped injector the concave trailing edge of which is fitted to the size and shape of leading edge of the polishing head with a gap of between 0 and 3 inches, the bottom surface facing the pad, which rests on the pad with a light load, and through which C...

A media blast nozzle for cleaning a surface with compressed air and ejected particles of a sublimating blast media comprises a media size changer to change a size of the blast media particles. The media blast nozzle has an entrance and an exit and a throat therebetween. A converging passageway extends from the entrance to the throat, and a diverging passageway extends from the throat to the exit. ...

The method of procucing a grinding wheel of the present invention is to dispose an axial hole and several radially-arranged slots on a nonwoven-fabric-based wheel body. The axial hole and the slots are independently disposed without communicating with each other. Each slot is then installed with a glued grinding materail to form a grinding wheel.

A window of solid light-transmissive polymer is formed in a polishing pad, and at least one surface of the window is treated to increase the smoothness of the at least one surface.

A lifting device has an elongate lifting arm provided with a suction mount enabling securing of the device to a body to be lifted. The suction mount has suction devices spaced apart in the longitudinal direction of the lifting arm sufficiently for a user to grip the lifting arm in between the suction mount devices. The device extends away from the suction mount, in the longitudinal direction of th...

The sleeve spanner bar of this invention comprises a spanner body, a sleeve element, a ratchet element, a connector, and a fixing element. The sleeve element is pivoted with the spanner body and contains a ratchet portion. A ratchet portion is formed at the central part of the ratchet element adjacent to the terminal surface of a first end, and the ratchet portion of a ratchet element is selective...