5 results about "Exothermic welding" patented technology

The invention relates to the technical field of welding quality online monitoring, and discloses an exothermic welding quality monitoring method based on sensing data. Arranging a temperature sensor at a welding station to be aligned with a heat release center, and collecting a calibration temperature and an original voltage sample to generate a conversion slope and an intercept; determining sampling starting and ending according to starting and working step ending signals, forming a voltage sequence according to a sampling interval, converting temperature, generating temperature rise by taking the first temperature as a reference, and normalizing the temperature rise; self-adaptive triangular smoothing is carried out according to the number of sampling points, a computable interval is limited, and differential change rate and local second-order bending rate energy samples are constructed; samples are sorted to obtain self-baseline statistics, an abnormal index, a quality value and an abnormal time period are generated in combination with maximum energy, and a quality grade is output and filed. Cross-device comparability is achieved, noise is resisted, invalid sampling is reduced, and compared with a peak value method, process abnormity is easier to recognize and locate and traceability is achieved.

This utility model discloses a mold fixing device for exothermic welding, belonging to the technical field of exothermic welding molds. It includes a base plate, a support seat fixed to the top of the base plate, and a storage groove on the top of the support seat for easy wire welding processing. A mold body is slidably connected to the side wall of the support seat, and the end of the mold body abuts against the base plate. Two fixing blocks for connection are welded to the top of the base plate, symmetrically positioned relative to the support seat. A movable pressure plate is also provided on the top of the fixing blocks, engaging with the fixing blocks and abutting against the wire. Through grooves corresponding to the storage grooves are provided on both sides of the bottom of the mold body, with the inner walls of the through grooves slidably connected to the side walls of the exothermicly processed wire. This utility model can not only fix welding wires of different sizes, but also, through the connection of the support seat and movable grooves, complete the fixation of the mold body and the base plate, ensuring the device remains stable during operation and improving its practicality.

The utility model relates to the technical field of welding, specifically discloses a heat releasing welding mould, including first mould and second mould of first mould one side, the outer wall top of first mould is hinged with mould cover through the hinge, the outer wall of first mould is provided with the opening and closing mechanism for the opening and closing action of first mould and second mould, the outer wall of mould cover is provided with the limiting mechanism for the fixed action of mould cover and second mould. Through first mould, second mould and mould cover constitute a heat releasing welding mould body, through the opening and closing mechanism that sets up, and then effectively realized the opening and closing of first mould and second mould, and when first mould and second mould are closed, through the tension spring under the tension effect, and then avoid the problem that there is a gap when heat releasing welding, cooperate limiting mechanism, and then effectively realized the upper part of first mould and second mould is sealed, avoid the problem of opening when heat releasing.

This invention discloses a quality inspection system for exothermic solder powder, belonging to the field of exothermic solder powder inspection technology. It solves the problem of delayed brittle fracture failure of exothermic welded joints during service due to the coupling of grain boundary segregation and corrosive environment caused by inadequate control of trace impurities such as bismuth during production, coupled with the blind spots in the screening of trace components in the current quality inspection system. The system includes a data acquisition module, a data cleaning module, a standardization module, a statistical modeling module, a distance calculation module, a control limit generation module, an anomaly detection and early warning module, a model storage and management module, and a database module. This invention constructs a reference statistical model by collecting known qualified solder powder samples. After standardizing the detection indicators of a new batch of solder powder, it calculates the Mahalanobis distance between the new batch and the center of the reference model. By comparing this distance with the control limits set based on the distribution of the reference samples, it determines whether the new batch has quality anomalies.

This invention proposes a quality evaluation method for aluminothermic welded joints based on welding process data, belonging to the field of welding technology. The method includes: collecting on-site parameters during the aluminothermic welding process; calculating the source quality score of the aluminothermic welded joint based on the on-site parameters; and formulating a handling strategy for the aluminothermic welded joint based on the source quality score. This method significantly improves the efficiency and consistency of quality evaluation, overcomes the subjectivity and lag of manual review, accurately identifies the risk levels of different types of defects, and provides data support for differentiated flaw detection and maintenance strategies, thereby comprehensively improving the quality control capabilities of railway welded joints and the level of traffic safety assurance.