摘要:
A tap including an incomplete thread having a plurality of thread ridges that threads a workpiece, a complete thread including a cutting edge formed continuously from the incomplete thread, and a groove part that is disposed in each of the incomplete thread and the complete thread to discharge chips of the workpiece, wherein relationships respectively expressed by Equation (1): D1≥D0−P and Equation (2): h≤P/2 are simultaneously satisfied in a relationship among a nominal diameter D0 of the tap 100, a root diameter D1, a pitch P, and a thread ridge height h.
摘要:
A cable drawn from a lower arm of a robot into a first upper arm part of an upper arm is further drawn out to an exterior space of the robot through a first hole of a second upper arm part. The cable is drawn in contact with a sidewall part of the second upper arm part, and is disposed in a wrist arrangement portion through a second hole. A slack part is formed taking account of a length of the cable pulled by a wrist when the wrist pivots in the wrist arrangement portion, and the cable is drawn to a tool through a through hole of the wrist.
摘要:
In order to prevent deterioration of sliding performance of a piston and center core misalignment of the piston when the piston moves for its stroke, there is provided an air bypass valve including: a coil casing in which a coil is accommodated; a pilot valve section covered by the coil casing and having a movable iron core inserted in the coil; and a piston section fitted in the coil casing and having a piston with a hole. The air bypass valve further includes a protrusion provided at an edge of an opening portion of the piston casing which constitutes the piston section.
摘要:
A continuous vacuum carburizing process carburizes material such as a steel wire 7 with a carbon content equal to or less than a desired carbon content by passing it under reduced pressure continuously through a carburizing atmosphere 5 with constant pressure and constant gas composition. A continuous vacuum carburizing apparatus for carrying out this process has at least one furnace core tube 1, 11, or 12 and a feeding/taking-up mechanism 13, 14 for the steel wire 7 in a vacuum container 1. Carburizing medium gas is supplied to the furnace core tube 1 via pipes 2, 4 to form the carburizing atmosphere 5. A heater 10 heats the furnace core tube 1, thereby activating carbon of the carburizing medium gas. In this way, material having a small thickness of, for example, 0.02 mm to 3 mm is carburized with less variation in the amount of carburization and no surface oxidation or sooting.
摘要:
An improved solid cemented carbide ball nose end mill is provided which enables a cutting of a quenched or hardened difficult-to-machine material without any chipping or break of edge under the condition of a high speed and high load cutting. The improved end mill comprises a substantially semi-spherical ball nose portion provided with such cutting edges as to form a virtually S-shaped symmetrical configuration as viewed from the tip end and a tool body integral with said ball nose portion and having a peripheral cylindrical portion being provided with no peripheral cutting edge and a shank at the rear end thereof. The cutting edges extending from the tip end of the ball nose portion to the respective terminals positioned at the furthest at the vicinity of the border between the ball nose portion and the tool body are formed in the ball nose portion only. Preferably, each of a rake angle and a relief angle of the cutting edge is set between 0.degree. and -10.degree., and between 6.degree. and 16.degree., respectively, further the cutting edges are coated with a titanium-aluminum nitride based material film.
摘要:
A hydraulic device comprises a variable displacement pump, a plurality of hydraulic actuators, a plurality of directional valves capable of controlling the delivery oil flowing into each of the actuators, a plurality of pressure compensation valves which compensate the pressures of respective directional valves, and a delivery oil flow rate varying means capable of controlling the pump delivery. At least one of the pressure compensation valves decreases its output flow to a particular actuator according to an increase in the loaded pressure of the particular actuator. With this arrangement, if the loaded pressure of the particular actuator suddenly changes, the loaded pressure attenuates to ensure stable operation of the hydraulic device. Further, the stable operation is fee of hunting for both low-load actuators and high load actuators, regardless of an independent operation or a compound operation.
摘要:
An electrically driven explosion-proof painting robot comprises a base having a first pressurized chamber, a rotary base having a second pressurized chamber, an inner arm having a third pressurized chamber and an outer arm having a fourth pressurized chamber. Each pressurized chamber is hermetically sealed and independently formed, can contain an electric motor connected with cables and is not in fluid communication with one another. Each pressurized chamber is supplied with pressurized air respectively by respective air pipes extending through the respective walls of the chambers. Each air pipe is made detectable its pressure respectively. An explosion-proof cable bundle housing cables and is shielded by a steel tube extend from the robot controller to the wall of the first pressurized chamber and from the first pressurized chamber other explosion-proof cable bundles extend in between the rest chambers through the respective walls of the rest chambers, to feed electric powers into the motors contained therein.
摘要:
In order to synchronize the operations of at least two industrial robots which can operate independently of each other in accordance with their respective operation programs, the time is obtained which is required for one of the robots serving as the master to move from one working position to the next position at which it operates jointly with the remaining robot. The remaining robot serving as the slave is moved from the position where it exists at present to another position corresponding to said next position, thereby synchronizing the operations of all the robots. An apparatus for such synchronous control comprises a program used to compute with a specified moving speed the interpolation movement due to which each robot is moved between the adjacent working positions and a program used to compute the interpolation movement with a specified moving time. In case of the asynchronous control, the robots move independently in accordance with their respective operation programs. On the other hand, in case of the synchronous control, the interpolation movement of the master robot is decided according to the moving speed specified program, while the interpolation movement of the slave robot is decided according to another program with the moving time of the master robot being specified.