33results about How to "Reliable tightening" patented technology

A control method includes two operating modes carried out in response to a position of a selector switch. The first operating mode provides: carrying out first impacts of the hammer onto the anvil; detecting the event of an impact of the hammer onto the anvil with an impact sensor; detecting an angular position of the anvil with an angle sensor; estimating an individual impact angle of the anvil due to the last detected impact, based on the angular position of the anvil before the last detected impact and the angular position of the anvil after the last detected impact, and comparing the individual impact angle with an individual impact setpoint angle. The first operating mode is ended when the individual impact angle drops below an individual impact setpoint angle. The second operating mode provides: detecting the angular position of the anvil with the angle sensor as the initial position; carrying out second impacts of the hammer onto the anvil; and detecting a relative rotation angle of the anvil with respect to the initial position during the second impacts. The second operating mode is ended when the relative rotation angle exceeds a standard angle.

The invention discloses a barrel tightening machine, which comprises a frame, a barrel tightening mechanism, a barrel fixing mechanism and a barrel station switching mechanism, wherein the barrel tightening mechanism comprises a servo motor, a tightening head and a spring; a rotor of the servo motor is arranged horizontally; the barrel fixing mechanism comprises a lower barrel positioning bracket and an upper barrel compressing mechanism; and the barrel station switching mechanism comprises a linear guide rail and a propelling air cylinder. According to the barrel tightening machine, a barrel is compressed through the air cylinder, and the bottom of the barrel is tightened through the servo motor, so that a working process is realized automatically, operation is easy, and the working efficiency is high; the tightening mechanism can move up and down, and the lower barrel positioning bracket and a barrel pressure plate can be selected according to barrels of different specifications, so that the barrel tightening machine can adapt to tightening operation of barrels of different specifications, and wide adaptability is achieved; and the tightening force and compression force can be detected and controlled accurately through a torque sensor and a pressure sensor, so that the barrel is prevented from being damaged in a tightening process, and good tightening quality is achieved.

The invention relates to a tightening and fixing structure of a test tank rear cover. The tightening and fixing structure comprises a rear cover and a tank body cooperating with the rear cover; a concave groove is arranged at the connection position of the rear cover and the tank body in a circumferential mode; and oblique wedges for fixing the rear cover are correspondingly arranged at the rear cover and the concave groove. And arrangement of a vacant portion of the rear cover meets the following condition: the oblique wedge at the concave groove is completely located at the vacant portion but is not contacted with the oblique wedge of the rear cover. According to the invention, the structure has the following advantages: (1), with application of the oblique wedge structure, objectives of screwing and loosening are achieved based on cooperation of the oblique wedges at the concave groove and the rear cove; and the friction force formed between the oblique wedges is large and the screwing is reliable; (2), the concave groove is driven by a hydraulic cylinder to make rotation, so that time and labor are saved and screwing is reliable; and (3), a concave groove rotation guiding device is further arranged and thus the concave groove can work stably, so that a defect that some oblique wedges bear large forces and thus are damaged or locked due to deflection of the concave groove during working can be overcome and thus the normal operation of the oblique wedges can be ensured.

The invention discloses an antiskid wrench. The antiskid wrench is characterized in that the antiskid wrench comprises a wrench body, a compression bar handle, a plunger and a pressing assembly; the wrench body is sequentially divided into a nut connecting part, a handle mounting part, a plunger part and a holding part from left to right; the nut connecting part is provided with a nut sleeve holepenetrating through the front and back of the nut connecting part; a sliding block mounting hole penetrating through the interior and exterior of the nut connecting part is formed in the upper part ofthe nut connecting part; a pressing sliding block of the pressing assembly is arranged in the sliding block mounting hole of the nut connecting part in a sliding manner; a handle mounting seat is arranged on the upper side of the handle mounting part; the compression bar handle is hinged with the handle mounting seat; the plunger part is provided with a plunger hole penetrating through the upperpart and lower part of the plunger part; the plunger is arranged in the plunger hole in a sealing and sliding manner; a first cavity in the wrench body penetrates through the nut connecting part, thehandle mounting part, the plunger hole of the plunger part and the holding part; liquid plastic is arranged in the first cavity; and the compression bar handle gest close to the holding part and presses the plunger downwards, and the liquid plastic is extruded by the plunger to allow the pressing sliding block to be contracted inward in the radial direction to clamp six surfaces of a nut.