9 results about "Effective depth" patented technology

The present application provides a hot-stamped component, the martensite content of the steel sheet substrate of the component is ≥ 95%; the average hardness of the laser cutting edge hardened layer of the component is ≤ 720 HV, the effective depth is ≤ 120 μm, the hardness peak value of the cutting edge hardened layer and the hardness ratio of the steel sheet substrate is ≤ 1.15; the tensile strength thereof is ≥ 2050 MPa and the elongation after fracture is ≥ 4.9%; the tensile test of the notched specimen is carried out at the tensile speed of 0.01 mm / min and 10 mm / min, the fracture strength ratio at the two speeds is ≥ 0.90. After further coating and baking, the average hardness of the laser cutting edge hardened layer of the component is ≤ 700 HV, the effective depth is ≤ 100 μm, the hardness peak value of the cutting edge hardened layer and the hardness ratio of the steel sheet substrate is ≤ 1.12; the tensile strength thereof is ≥ 1950 MPa and the elongation after fracture is ≥ 5.5%; the equivalent fracture strain in the flat state is ≥ 0.175.

The invention relates to a 42CrMo steel nitriding part quenching machining allowance determination method and system, and relates to the field of metal nitriding treatment.The 42CrMo steel nitriding part quenching machining allowance determination method comprises the steps that a split image of a split face of a part is collected; analyzing a feature distance according to the split image; when the feature distance is greater than a preset initial margin, calculating a difference between the preset initial margin and the feature distance, and defining the difference as a correction step length; and the machining allowance is determined through the correction step length and a preset initial allowance, and the machining allowance is defined as the initial allowance. The quenching device has the effects that the quenching effective depth and mechanical performance of the part are improved, and the situation that the machining allowance is inaccurate is reduced.

The application provides a setting method of an effective depth of a shock isolation trench. The setting method of the shock isolation trench is as follows: determining a shock influence range according to a connecting line of a region boundary line adjacent to a side of an existing building of a vibration source range and an angle point of an outer contour of the existing building, then determining a length of the shock isolation trench according to the shock influence range, then controlling the vibration source to move on the region boundary line adjacent to the side of the existing building of the vibration source range, and then determining an effective shock isolation effective depth of the shock isolation trench by monitoring a measured horizontal acceleration and a measured vertical acceleration at the angle point of the outer contour of the existing building and comparing the measured horizontal acceleration and the measured vertical acceleration with a standard horizontal acceleration and a standard vertical acceleration of the region during the moving process. The application considers the law of vibration propagation attenuation with distance and quantitatively digs the effective depth of the shock isolation trench, reduces the earthwork excavation of the shock isolation trench, reduces the construction cost, and effectively blocks the propagation of the vibration.

The invention discloses a welding method for a large-length-diameter-ratio stainless steel assembly, and relates to the technical field of stainless steel workpiece welding. The welding method for the stainless steel assembly with the large length-diameter ratio comprises the steps of pre-welding treatment, workpiece butt joint and assembly clearance measurement, vacuum tack welding and clearance remeasurement, heat dissipation tool assembly and vacuum seal welding, fusion welding and heat preservation treatment. By optimizing the technological process and matching with a special heat dissipation tool, the problems of welding deformation and substandard coaxiality of the stainless steel assembly with the large length-diameter ratio are effectively solved. The welding defect source is reduced through pre-welding treatment, the precision basis is guaranteed through measurement and remeasurement of an assembly gap, heat deformation is cooperatively restrained through sealing welding, fusion welding and subsequent heat preservation treatment in a vacuum environment, high coaxiality of the assembly is guaranteed, meanwhile, the requirements for the effective welding depth and the airtight performance are met, the welding bead quality is good, and the mechanical property is good; the welding reliability is obviously improved, the service life of the assembly is obviously prolonged, and the strict welding requirement of the large-length-diameter-ratio stainless steel assembly is met.

Various embodiments of a driving tool with bit storage are provided. In a specific embodiment, the driving tool includes a handle, a shaft, and a socket. The shaft is centered on and extends along a longitudinal axis. The shaft includes a flange extending away from an external surface of the shaft. The flange includes a first step extending circumferentially around the longitudinal axis, and the first step defines a first radius. The flange further includes a second step extending circumferentially around the longitudinal axis, and the second step defines a second radius different from the first radius. The socket includes a first end configured to engaged with the first step such that the first step defines a first effective depth of the socket.

The present invention discloses a method for calculating the bending moment of reinforced concrete components taking into account the change in the position of the neutral axis, including the steps of: 1. judging whether the cross section of the reinforced concrete component is cracked; 2. executing step 3 when the cross section is not cracked; 3. executing step 6 when cracking occurs; 4. calculating the curvature; 5. obtaining the position of the central axis; 6. calculating the effective depth of the crack; 7. calculating the effective moment of inertia and the curvature; 8. assuming the position of the central axis of the reinforced concrete component with a cracked cross section so that the cross section is subjected to force balance and calculating the true moment of inertia; 9. obtaining the true position of the central axis of the reinforced concrete component with a cracked cross section; 10. calculating the bending moment. The method of the present invention has simple steps, reasonable design, and convenient implementation. It can be effectively applied to the calculation of the bending moment of reinforced concrete components. The calculation result is more accurate, takes into account the change in the position of the neutral axis, reflects the true situation of the bending stiffness of the cracked cross section, has a significant effect, and is easy to promote.

A gauge for rapidly detecting the effective depth of a reamed hole is characterized in that the gauge comprises a shell, an inner core, a locking mechanism, a spring and a dial indicator, a moving groove is formed in the upper end of the shell, and the notch of the moving groove is connected with the dial indicator through the locking mechanism; the locking mechanism is arranged on the shell, the dial indicator is arranged in the shell, a test end of the dial indicator extends into a moving groove of the shell and is in contact with an inner core which is inserted into a mounting groove arranged on the shell, and a spring is arranged between the top end of the inner core and the lower end of the locking mechanism. And then the gauge is pressed downwards, and when the bottom of the vertical rod cannot move downwards, the upper plate of the inner core jacks the dial indicator, so that reading can be carried out through the dial indicator, namely, the effective depth of the reaming at the moment is detected, the effective depth of the reaming is rapidly detected, and the time of repeated modification caused by inaccurate detection of the effective depth of the reaming by an operator is saved.

This invention provides a method for determining the effective reinforcement depth and range of dynamic compaction, comprising: conducting multiple sets of dynamic compaction tests on the construction foundation; in the multiple sets of dynamic compaction tests, the total compaction energy is a constant value, and the number of compaction blows or the compaction energy of each blow is varied to form a set of dynamic compaction tests; arranging multiple monitoring points in the construction foundation around the selected compaction points of the dynamic compaction tests, and arranging acceleration sensors and pore water pressure sensors at the monitoring points; acquiring soil data before and after compaction at each monitoring point, as well as acceleration data and pore water pressure data collected by the sensor units after compaction, to calculate the reinforcement improvement rate of the monitoring points in each set of dynamic compaction tests, and to calculate the reinforcement analysis data of each monitoring point; based on the reinforcement analysis data of the monitoring points obtained from the multiple sets of dynamic compaction tests, determining the effective reinforcement depth and horizontal range of dynamic compaction on the construction foundation. This invention can accurately obtain the effective reinforcement depth and range of dynamic compaction.

The utility model provides a profile traction structure which comprises a rack, a clamping oil cylinder and a pressing plate and further comprises a base plate, an anti-skid groove is formed in the clamping face of the base plate, a connecting bolt is screwed in the anti-skid groove, the connecting bolt penetrates through the base plate and then is screwed with the pressing plate, and a filling strip located in the anti-skid groove is arranged on the connecting bolt. The base plate with the anti-skid groove is additionally arranged on the pressing plate, the effective depth of the anti-skid groove is changed along with the screwing-in depth of the connecting bolt, the friction force between the anti-skid groove and the sectional material can be increased, and the slipping phenomenon is prevented.