72results about How to "Reduce production errors" patented technology

The invention discloses a PCB expansion compensation method which comprises the following steps: a PCB is divided into a plurality of areas; at least two reference targets are arranged on each zone; and after pressing of the PCB, actual positions of the reference targets on each zone are measured and are compared with theoretical positions, and expansion values of each zone are converted. According to the PCB expansion compensation method, the PCB is divided into a plurality of zones before being pressed, at least two reference targets are arranged on each zone; actual positions of the reference targets on each zone of the PCB are measured after pressing and are compared with theoretical positions so as to obtain expansion values of different zones of the PCB. The PCB has inconsistent expansions at different positions. Through zonal measurement, expansion deviation of the PCB can be reduced greatly. By obtaining the expansion values of each zone, zonal compensation is carried out on each follow-up process, and production errors of follow-up processes are reduced. Thus, accuracy of manufacturing the PCB is raised.

A compensation method for PCB expansion and contraction, comprising the following steps: a PCB (100) is divided into a plurality of areas; at least two reference targets (110) are arranged on each area; after the PCB (100) has been pressed, the actual positions of the reference targets (110) on each area are measured and compared with theoretical positions, and an expansion and contraction value of each area is converted. The expansion and contraction of a PCB is inconsistent at different positions. Partition area measurement significantly reduces expansion and contraction deviation of the PCB, and partition area compensation is performed on subsequent processes via the obtained expansion and contraction value of each area, thereby reducing production errors in the subsequent processes, and increasing the manufacturing precision of the PCB.

The invention discloses stainless steel sloping plate forming equipment. The stainless steel sloping plate forming equipment comprises a frame body; two pressing devices are arranged on the frame bodyand a working channel for a stainless steel plate to pass is arranged between the two pressing devices; the stainless steel plate forms a stainless steel wave plate after passing through the workingchannel and short planes are correspondingly arranged at the two sides of the stainless steel wave plate; a plurality of wave-shaped structures are arranged on the stainless steel wave plate; the wave-shaped structures comprise planes which are parallel to the horizontal plane, first sloping surfaces which form a 60 + / - 10 degree angle with the horizontal plane and second sloping surfaces which form a 120 + / - 10 degree angle with the horizontal plane. According to the equipment, the upper pressing device and the lower pressing device are matched with each other, so that the product efficiencyof the stainless steel plate is doubled under two forces during pressing; moreover, by means of the pressing manner, the stainless steel plate can be supported and pushed forward, so that the labor cost is saved; meanwhile, the devices press at the same time, so that the stainless steel plate would not deviate and the production error is reduced.

The invention discloses a vehicle brake aluminum part molding device. The device comprises a base; the base is provided with a support rod and a bracket; the support rod is provided with a bearing 1; a separation plate sleeves the bearing 1; a limiting plate 1 is arranged at the front end of the separation plate; an upper model is arranged at the upper end of the separation plate, and is provided with a pouring pipe; a lower model is arranged at the lower end of the separation plate; a limiting plate 2 is arranged on the side surface of the bracket; a two-way lead screw is arranged in the bracket; a fixed base is arranged at the bottom of the two-way lead screw; a stepper motor is arranged at the upper end of the bracket; a main shaft of the stepper motor is connected with the two-way lead screw; nut bases are respectively arranged at two ends of the two-way lead screw; an upper sand box and an upper support base are respectively arranged at two ends of the nut base at the upper end; a pressing column is arranged at the bottom of the upper support base; a lower sand box and a lower support base are respectively arranged at two ends of the nut base at the lower end; a seepage plate is arranged at the bottom of the lower sand box; and a molding core box is arranged at the upper end of the lower support base. The device is high in machining efficiency, low in production error, simple in operation and excellent in economic benefit.

The invention discloses a flexible shearing device, comprising a fixing bracket; a horizontal upper support plate and a lower support plate are arranged on the fixing bracket; a fixed blade is arranged on the lower support plate; an adjusting space is arranged between the upper support plate and the lower support plate; a flexible shearing mechanism is arranged inside the adjusting space; the upper support plate is connected with a movable cutter by the flexible shearing mechanism; an upper blade is arranged on the movable blade; and the flexible shearing mechanism adjusts the upper blade to be always in elastic contact with the fixed blade. According to the flexible shearing device, the structure with the fixed blade and the movable upper blade is utilized; the upper blade is always in elastic contact with the fixed blade by means of the flexible shearing mechanism, so that the technical problem of an oversized clearance between two blades is solved and the shearing quality and efficiency are improved.

An adjustable furniture damping operation structure comprises a fixing seat, a hinge arm, a spring, a connecting arm assembly and a stop element. The connecting arm assembly at least comprises a first connecting arm and a second connecting arm. One end of the first connecting arm and one end of the second connecting arm are hinged to the fixing seat and the other end of the first connecting arm and the other end of the second connecting arm are hinged to the hinge arm. The stop element is hinged to the hinge arm and turned over, opened and closed to the fixing seat through the spring. A damping device in transmission fit with a lever is arranged on the fixing seat. The damping device comprises a swing rod element, a lever element and a damper. The first connecting arm at least drives the swing rod element when the stop element is closed, the swing rod element drives the lever element to act on the damper, and the damper is compressed so as to achieve the buffer effect. An adjusting assembly is arranged on the damping device and used for adjusting the position of the swing rod element or the lever element or the damper relative to the fixing seat, so that force acting on the damper by the swing rod element and / or the lever element is increased or decreased, and finally the buffer force is adjusted when the stop element is closed.

The invention provides a fluxgate current sensor and a current measurement method. The fluxgate current sensor includes: an auxiliary magnetic core and at least two closed-loop magnetic circuits; the closed-loop magnetic circuits are symmetrically coupled; the auxiliary magnetic core is arranged in the closed-loop magnetic circuit. Magnetic circuit coupling connection. The fluxgate current sensor of the present invention has a symmetrically coupled closed-loop magnetic circuit, which can provide a magnetic field environment for symmetrical measurement, reduce the influence of high-order harmonics caused by the position of the eccentric conductor, reduce the production error between different sensors, and improve the measurement accuracy. .