15results about How to "Low shape requirement" patented technology

The invention discloses a probe card and a multi-probe channel resistance measuring system and method.The probe card comprises a substrate and a probe bonding pad area located in the middle of the substrate, the probe bonding pad area comprises a plurality of bonding pads arranged in a plurality of rows and columns, the bonding pads are used for welding sleeves of a plurality of elastic probes, and the elastic probes are arranged in the bonding pads. The plurality of rows and the plurality of columns of bonding pads are connected to the corresponding wires in a one-to-one correspondence manner, so that the elastic probes of any four bonding pads form a group of test terminals. According to the probe card and the multi-probe channel resistance measurement system and method provided by the invention, any N of the M elastic probes are selected to form a group through the channel selection device to realize resistance measurement of the to-be-measured sample, and different N elastic probes are selected during multiple times of measurement, so that resistance test of any area of the to-be-measured sample can be realized.

The invention belongs to the technical field of electrically-driven actuators, and discloses an electrically-driven actuator which comprises a shell, a driver and a brake device, and the shell is provided with an installation space; the driver is mounted on the shell and comprises a transmission shaft, and the transmission shaft extends into the mounting space; the braking device is arranged in the mounting space and comprises a braking piece and an elastic piece, the braking piece comprises a braking part and an abutting part, the braking part faces the transmission shaft in the radial direction and is connected with the abutting part, and the elastic piece abuts between the inner wall of the mounting space and the abutting part so as to drive the braking part to brake the transmission shaft. According to the electrically-driven actuator, the elastic piece is used for driving the braking piece to press the transmission shaft, the transmission shaft is braked, and the shape requirement and the installation requirement for the braking piece, the shape requirement and the installation requirement for the elastic piece and the matching precision requirement for the braking piece and the elastic piece are lowered.

The invention discloses an electrochemical polishing solution for a laser additive manufacturing alloy material and a polishing method of the electrochemical polishing solution, and belongs to the technical field of alloy material polishing treatment. The problem that the roughness of an alloy material obtained through existing laser additive manufacturing is too high is solved. The electrochemical polishing solution for the laser additive manufacturing alloy material, provided by the invention, comprises choline chloride and ethylene glycol, the molar ratio of choline chloride to ethylene glycol is 1: (1.8-2.2). The electrochemical polishing solution provided by the invention can be used for carrying out polishing treatment on the laser additive manufacturing special-shaped alloy material, and finally, the surface flatness of a workpiece can be improved.

This application relates to the field of conveying equipment technology, and proposes a tensioning structure and a roller motor. The tensioning structure is used to connect a driving component and a rotating component. Under the drive of the driving component, the tensioning structure can drive the rotating component to rotate around a rotation axis. The tensioning structure includes: a first connecting component, which is connected to the driving component; a limiting component, including a bottom wall and a side wall provided along the periphery of the bottom wall, with an installation groove on the side wall, and the bottom wall is detachably connected to the first connecting component so that the side wall can be sleeved on the first connecting component; and a tensioning component, which engages with the installation groove, with the side of the tensioning component opposite to the first connecting component protruding from the installation groove and abutting against the rotating component. In the above-mentioned tensioning structure, a reliable frictional force is generated between the tensioning component and the rotating component to achieve a fixed connection, thereby driving the rotating component to rotate around the rotation axis. This connection method has low requirements for the shape of the tensioning structure, reduces the requirements for processing accuracy, and solves the technical problems of existing roller and sleeve connection methods that have high processing accuracy requirements and complex disassembly and assembly.

The present application discloses a wall-mounted base for an oscillating head machine and an assembly method thereof, and belongs to the technical field of oscillating head machine installation. A wall-mounted base for an oscillating head machine comprises a base body, a waist-shaped hole is provided at the bottom of the base body, a waist-shaped plate is provided on the inner side of the base body relative to the waist-shaped hole, and a gap is left between the waist-shaped hole and the waist-shaped plate for the screw head to pass through; steps are provided on both sides of the waist-shaped hole close to the waist-shaped plate, and when the base body and the screw are in an assembled state, the side of the screw head close to the screw tail abuts against the step, and the side of the screw head away from the screw tail abuts against the waist-shaped plate; the side of the step away from the end of the waist-shaped plate adopts an oblique transition. The wall-mounted base for an oscillating head machine and the assembly method thereof do not need to connect the oscillating head machine to the wall through a bracket, which simplifies the wall-mounted structure of the oscillating head machine, facilitates assembly, and ensures that the oscillating head machine is firmly fixed to the wall.

The utility model discloses a multi-channel flat pipe which comprises a connector, a connecting piece and a flat pipe, the whole connecting piece can be inserted into the connector, one end of the flat pipe can be inserted into the connector, the connecting piece is provided with an embedded part, the embedded part can be embedded into the end, inserted into the connector, of the flat pipe, and the flat pipe can be inserted into the connector through the embedded part. Due to the fact that the connector is arranged on the flat pipe, when the connector is fixedly connected with the flat pipe, the pipeline of the flat pipe cannot be concaved inwards, meanwhile, the connector is provided with a welding part, and the inner wall of the welding part is close to the outer wall of the end portion of the flat pipe inserted into the connector. And the welding part and the outer wall of the end part of the flat pipe can be welded together through laser, so that the joint and the flat pipe are fixed and sealed together.

This invention discloses a laser pulse phase-based ranging system with low walking error, comprising a TIA circuit, a pulse amplification unit, a timing discrimination circuit, an RS latch circuit, and an ADC circuit. The output of the TIA circuit is connected to the pulse amplification unit, the output of the pulse amplification unit is connected to the timing discrimination circuit, and the output of the timing discrimination circuit is connected to the RS latch circuit and the ADC circuit. The pulse amplification circuit includes a differential amplification circuit and a post-amplifier circuit connected to the output of the differential amplification circuit. This invention proposes that the phase-based ranging section directly performs undersampling of the acquired analog pulse signal to a sine wave using an ADC, eliminating the need for a subsequent mixing and filtering circuit unit, thus simplifying the system circuitry and reducing power consumption. Furthermore, it proposes using the comparator delay to compensate for the walking error of pulses with different amplitudes, thereby reducing the walking error of pulses with different amplitudes and overcoming the negative impact of comparator delay on walking error.

The utility model discloses a sample clamp for a metal in-situ analyzer, which belongs to the technical field of steel analysis and comprises a rectangular outer frame, a plate on one side of the rectangular outer frame is a clamping plate, and a plate on the corresponding side of the clamping plate is a mounting plate; a clamping assembly is arranged in the rectangular outer frame, the clamping assembly comprises a clamping block which is located in the containing space and arranged relative to the clamping plate, the clamping block is matched with the clamping plate to be used for clamping a sample, a push-pull rod is arranged on the end face, away from the side of the clamping plate, of the clamping block, and the push-pull rod penetrates through the mounting plate in the horizontal direction and extends outwards; and a locking component for locking the position of the push-pull rod is arranged in the mounting plate at the penetrating position of the push-pull rod along the axial direction vertical to the push-pull rod. According to the utility model, the requirement on the shape of a sample can be reduced, samples with different sizes can be easily switched, the adjustment and the use are convenient, and the problem that the experimental result is influenced by uneven clamping is avoided; the push-pull rod is used for clamping, torque cannot be generated, and the situation that one side of the sample is upwarped and uneven is avoided.

The embodiment of the present invention provides a drying feeding device. The device includes a feeding system, a spiral feeding system, a microwave heating system and a water vapor guiding system. The spiral feeding system includes a spiral tube, which is divided into a feeding area, a first sealing area, a drying area, a second sealing area and a discharging area, and a continuous spiral blade is arranged on the rotating shaft in each area. After the material enters the spiral tube, it is stirred and pushed by the spiral blade, passes through the first sealing area and enters the drying area, and is continuously heated by the microwave heating system and heated and dehydrated by the spiral blade, and expanded and loosened; the water vapor in the drying area is automatically discharged after purification through the water vapor guiding system to maintain the safety pressure in the device; the dehydrated material is sent into the reaction chamber after passing through the second sealing area and the discharging area, and subsequent reactions occur. The device has uniform heating, energy saving, pressure resistance, fast control response, strong adaptability, and high space utilization, and can realize the rapid, efficient and safe drying and dehydration of organic solid waste materials.

This invention discloses a rapid prediction method for the thermal conductivity of phenolic resin based on scanning electron microscopy (SEM) images. This invention requires only conventional SEM images, extracts structural parameters such as porosity, equivalent particle diameter, and bond ratio through automated image processing, and then inputs these structural parameters into a pre-trained machine learning surrogate model to achieve rapid prediction of the material's thermal conductivity. Compared with existing methods that require multi-scale 3D reconstruction and direct numerical solutions, this invention significantly reduces the requirements for sample size and characterization equipment, simplifies the modeling process, and achieves high computational efficiency. Furthermore, because the prediction model fully incorporates the influence of nanoscale pores and particle structure on thermal conductivity during the training phase, this invention can quickly provide the effective thermal conductivity of resin-based composite materials while maintaining high accuracy, providing an efficient and reliable means of evaluating thermal conductivity performance for material formulation design and process optimization.

The invention belongs to the technical field of solid rocket engine inner heat insulation layers, and particularly relates to a solid rocket engine inner heat insulation layer preforming production line and a solid rocket engine inner heat insulation layer preforming production method.The solid rocket engine inner heat insulation layer preforming production line comprises a forming unit and a transfer system; a feeding and discharging device used for feeding and discharging of the multi-layer hot press is arranged on one side of the multi-layer hot press, the forming unit further comprises an upper mold lifting device used for lifting and falling an upper mold so that the upper mold and a lower mold can be buckled or demolded, and the transfer system comprises an electric flat car used for transferring the upper mold and the lower mold. A three-layer or more plate frame lower jacking type hydraulic machine form is adopted as a forming unit, multiple interlayer molds can be independently moved in / out, lifted outside the machine and rapidly replaced, the mold filling difficulty is reduced, the mold filling efficiency is greatly improved, mixed line production of inner heat insulation layer parts of two or more specifications can be met, the whole line has full-automatic operation, the production efficiency is improved, and the production cost is reduced. Manual intervention is not needed, and production efficiency is high.

The utility model discloses a mining electric shovel and A-shaped frame pull rod waterproof cover plate assembly, and left cover plate and right cover plate butt joint together and arrange on the machine shed top cover plate, left fixed base and right fixed base butt joint together and arrange on left cover plate and right cover plate, and pull rod passes through from the butt joint of left and right cover plate and the butt joint of left and right fixed base, two rubber sleeves are installed between left cover plate and left fixed base and between right cover plate and right fixed base respectively, and after butt joint, two rubber sleeves surround pull rod and closely fit with the side of pull rod, and first fastening part is structured to fix and release the fixing between left and right fixed base, and second fastening part is structured to fix and release the fixing between left cover plate, left fixed base and rubber sleeve and between right cover plate, right fixed base and rubber sleeve. Based on the existing machine shed top cover plate, a group of waterproof cover plate assembly of direct connection pull rod is newly added to the upper portion, and the waterproof performance of the part is strengthened.

The invention belongs to the technical field of post-processing of 3D printed parts, and particularly relates to a wet coloring post-processing method of a 3D printed part. The method comprises the following steps: a) preparing dye liquor; b) preparing a 3D printed piece with micropores in the surface; c) placing the 3D printed piece in the dye liquor, heating and applying a mechanical effect to promote coloring; and d) slightly dissolving the surface of the workpiece by using an organic solvent mixed solution to promote fixation of the dyeing material. Compared with a traditional post-treatment mode, the method has the advantages that the coloring process is convenient and fast, operation is convenient, the use cost is saved, the used dye liquor and organic solvent mixed liquor can be recycled, the use amount of the organic solvent in the color fixing process is small, the environmental influence factor is small, the requirement for the shape of the workpiece is low, and the applicability to 3D printing complex-structure workpieces is higher; the coloring of a plane structure and a complex structure is facilitated, the color fastness is good, the mechanical property is obviously improved, and the surface roughness is improved.

The invention discloses a porous wave-transparent super-hydrophobic coating as well as a preparation method and application thereof, and relates to the technical field of functional coatings. The coating is prepared from the following raw material components in parts by mass: 1 to 10 parts of wave-transparent resin, 0.1 to 5 parts of fluorinated modifier, 0.5 to 6 parts of curing agent, 6 to 60 parts of volatile organic solvent and 0.1 to 2 parts of water solvent. The super-hydrophobic coating is prepared by adopting a method of constructing a porous structure in the wave-transparent resin, so that the wave-transparent performance of the coating is synergistically improved, and meanwhile, the coating is endowed with waterproof and self-cleaning functions.

The utility model belongs to the technical field of packaging boxes, and discloses a cab interior trim outer package anti-extrusion packaging box which comprises a bottom plate, sleepers are installed at the bottom of the bottom plate, two long side plates and two short side plates are symmetrically installed on the bottom plate, the two long side plates are fixedly installed on the bottom plate, and the two short side plates are symmetrically installed on the bottom plate. The two short side plates are installed on the bottom plate in a hinged mode, and a cover plate is installed on the tops of the long side plates and the tops of the short side plates together. Fixing mechanisms are mounted between the long side plates and the short side plates, and fixing mechanisms are also mounted between the cover plate and the long side plates and between the cover plate and the short side plates; a plurality of fixing holes are evenly formed in the tops of the long side plates, at least two sets of vertical battens are fixed to the long side plate on one side through the fixing holes, fixing blocks are integrally arranged on the vertical battens, a plurality of inserting grooves are integrally formed in the vertical battens, inserting blocks are placed in the inserting grooves, and a bandage is connected between the inserting blocks on the two sides.