52results about How to "Control process" patented technology

The invention relates to a processing method of a singular region by virtue of five-axis machining. The method comprises the following steps: establishing a kinematics conversion relationship of an AC (alternating current) dual-rotary-table five-axis machine tool, carrying out primary optimization treatment on a C-axle rotation angle while inverse kinematics changes so as to obtain cutter shaft data, and traversing the cutter shaft data; in the traversing process of the cutter shaft data, detecting the boundary range of the singular region by using a method based on a Jacobian matrix condition number; carrying out secondary optimization treatment on a singular point and a C angle nearby the singular point within the boundary range of the singular region to obtain new cutter shaft data; and carrying out recursion interpolation treatment on a subinterval with still larger C angle change between the two adjacent lines in the new cutter shaft data to obtain the final cutter shaft data. By adopting the method provided by the invention, velocity jump of a rotation shaft in the singular region can be effectively reduced, overlarge non-linear errors generated by the velocity jump can be reduced, the processing precision can be improved, and the machine tool as well as parts and components can be effectively protected.

The invention provides a preparation method of flaky silver powder, comprising the following steps: under the condition of a water bath at 10-20°C, silver nitrate solution is mixed with a reducing agent solution with a pH value of 1.0-2.0, and the dropping rate is 40-60L / min , continue the reaction to obtain the liquid after the reaction; let it settle, remove the supernatant, wash the lower sediment with water until the conductivity is <20μS / cm, filter and dry to obtain spherical silver powder; put the spherical silver powder into the ball milling equipment, and add Zirconia balls, oleic acid or stearic acid and ethanol are ball milled, and then the zirconia balls are separated, filtered, dried and sieved to obtain dry flake silver powder. The preparation method of the invention is simple and the preparation period is short, and the average particle size of the obtained flake silver powder is 4-6 μm, the distribution is concentrated, the thickness and shape are uniform, and the surface is smooth.

The present invention provides a clothes processing device. The clothes processing device comprises a main body, a clothes support frame, a clothes processing device body, a transmission pipeline and multiple output pieces. The main body is provided with an accommodating cavity for accommodating to-be-processed clothes; the clothes support frame is arranged on the upper part of the accommodating cavity; the clothes processing device body is arranged on lower part of the accommodating cavity and comprises an air supplying unit and a moisture supplying unit; the transmission pipeline comprises a main pipeline and multiple sub-pipelines; one end of the main pipeline is connected to an output end of the air supplying unit and an output end of the moisture supplying unit; the sub-pipelines are connected to the other end of the main pipeline; the output ends of the sub-pipelines are arranged on multiple connecting rods; each of the output pieces is connected to the output end of the corresponding sub-pipeline; and the output pieces are arranged on the middle part of the clothes support frame and are arranged along the length direction of the to-be-processed clothes. According to the invention, when the clothes are in the natural vertical state, the clothes processing is rapidly finished.

The invention relates to a digital film reading seminar system which is characterized by comprising a server, a participant platform module, a foreground processing module and a background management module. The participant platform module, the foreground processing module and the background management module are connected with the server through the network. The server is provided with a first database which stores digital sections and related information, participant commend information and speech and presentation manuscripts and a second database which stores film reading seminar information. Multiple participants, speakers and film reading seminar managers perform transmission and exchange of the digital sections and the related information, the participant commend information and / or the film reading seminar information with the server through the participant platform module, the foreground processing module and the background management module respectively. Easy switching of the presentation manuscripts, the digital sections and interaction with the participants in the speech of the speakers can be realized, and the smoother discussion on the content of the film reading seminar can be obtained between the participants and the speakers and between the participants.

The invention discloses a sealing welding technique of a low-alloy steel pipe plate and a stainless steel pipe of a low-pressure heat exchanger, comprising the following steps: the stainless steel pipe is arranged in a pipe hole in the low-alloy steel pipe plate, the pipe exceeds the end part of the pipe plate by 0 to 1.0mm, the pipe plate is not provided with a bevel edge, and manual argon arc welding or automatic argon arc welding is carried out to the stainless steel pipe and the low-alloy steel pipe plate; the technological parameters thereof when the argon arc welding is carried out are as follows: the voltage is 10 to 16V, the current is 50 to 110A and the welding speed is 0.6 to 1.2mm / s; as a further improvement, welding wires containing more than or equal to 19.5 percent of chromium and more than or equal to 9 percent of nickel by weight percentage are also used when in argon arc welding, and the wire feeding speed is 2.5 to 3.15mm / s. The sealing welding technique has the advantages of having less procedure and simple processing and being time-saving, improves production efficiency, reduces production cost, has no crack for the welding seam, and can meet the long-term and stable operation of the low-pressure heat exchanger.

The present invention provides a risk control method, device, electronic device, and computer-readable storage medium for electronic transactions; the method includes: receiving characteristic information of electronic transactions carried out in a client; determining the electronic exchange based on the characteristic information The risk scenario at the place, and determine the risk level of the electronic transaction in the risk scenario; among the multiple risk control methods corresponding to the risk scenario, determine the risk control method that matches the risk level of the electronic transaction, as a target risk control method for controlling the electronic transaction; applying the target risk control method to the electronic transaction performed in the client to delay the electronic transaction in the risk scenario where the electronic transaction is located. The progress of the transaction. The invention can effectively control the progress of the electronic transaction and reduce the accidental injury rate of the electronic transaction.