35results about How to "Save test material" patented technology

The invention discloses an integrated working condition simulation device of a highway culvert centrifugal model test and a test method. The device comprises a bottom plate, a height fixing frame, a pair of telescopic plates, a foundation model, a test soil sample, a counterweight device and a culvert model; the bottom plate is flatly spread on the bottom surface of a centrifugal model box; the height fixing frame is installed on the bottom plate; the foundation model is placed on the bottom plate; the culvert model is placed on the foundation model; the telescopic plate are symmetrically installed on the bottom plate at both sides of the foundation model; the telescopic plates are arranged obliquely; a hollow cavity enclosed by the centrifugal model box, the bottom plate, the pair of telescopic plates, the foundation model and the culvert model is filled with the test soil sample; the counterweight device is spread on the test soil sample. The test device is simple in structure, convenient to operate, free of frequency disassembly and assembly, and capable of efficiently and accurately satisfying the requirements of designing the highway culvert centrifugal model test and improving the test efficiency and precision.

The invention provides a Linux-based dual-mode interconnection double-board function test method, which belongs to the field of large-scale testing of computer dual-mode interconnection board factories. The single-mode cross test is carried out, and the device information matching and log information matching are carried out, which effectively increases the test coverage and ensures the consistency of the dual-mode test boards, with high efficiency and low cost, without increasing the labor intensity of workers.

The invention discloses a method for obtaining a material strain-life curve through a small punch fatigue test, which relates to the technical field of material fatigue performance testing, and specifically includes: obtaining the maximum load-fatigue life curve of a material; obtaining material mixed hardening model parameters; establishing a small The finite element model of the punch fatigue test; determine the critical surface of the small punch fatigue sample and obtain the stress-strain history on the critical surface; determine the material energy-life formula; determine the material strain-life curve of uniaxial fatigue. The beneficial effect of the present invention is that the strain-life curve of the material is obtained through the small punch fatigue test, the single uniaxial fatigue test and the finite element analysis; then the fatigue performance of the material can be accurately tested, and the in-service equipment material, local micro-area can be evaluated The fatigue performance of materials and new materials can also save a lot of materials, which is of great significance to the fatigue performance testing of in-service equipment materials, new materials and local micro-regions.

The invention relates to a cooking testing machine for multi-pot papermaking, the main structure of which comprises four parts: a box body, a frame I, a box cover movement system II and a multi-pot cooking movement system III, and a heating and measuring control system IV, wherein the frame is used for containing the box body and supporting two movement systems; the box cover movement system II finishes the stable opening and sealed closing of a box cover; the multi-pot cooking movement system III finishes the fixing of multiple pots and drives the multiple pots to be rotated around a rotating shaft of a face plate type bracket in the heat conducting oil of the box body; and the heating and measuring control system IV finishes the heating, temperature measurement, display and control of the heat conducting oil. The machine can finish the cooking of multiple small-volume pots at a time, realizes the purposes of saving the test material and enhancing the test efficiency, and simultaneously has the characteristics of being uniform in heating and stirring, accurate in temperature control, reliable in seal, simple in operation and easy in control of the test course.

The invention discloses a turntable type multi-sample synchronous friction abrasion testing device which comprises a sample table, a fixing device, a driving device, a friction pair, a loading device and a friction coefficient measurement device, wherein the friction coefficient measurement device consists of a frictional force sensor, a variable power source, a signal acquisition circuit, a computer and a resistor chip. The connecting relationship is that the sample table is fixed on the driving device through the fixing device; the input end of the frictional force sensor is connected to the loading device, and the output end of the frictional force sensor is connected with the computer; two output ends of the variable power source and the input end of the signal acquisition circuit are respectively connected to the sample surface and the sample table; the output end of the signal acquisition circuit is connected to the computer; the resistor chip is attached to the sample. The invention also provides a corresponding testing method. The testing device is easy to mount and high in practicability, the friction abrasion conditions of different materials under the same parameter can be synchronously measured, the test material is saved, and the testing efficiency is improved.

The invention relates to a saw cutting simulation testing method. The method comprises the steps that a toothed blade is installed on a blade holder; the relative position of the toothed blade and a workpiece is adjusted through a transmission mechanism, a connecting line of the tooth top of the toothed blade and a workpiece rotation center is parallel to the length direction of the toothed blade,the plane where the toothed blade is located is perpendicular to the axial direction of the workpiece, blade setting is conducted, and cutting simulation testing is ready to be conducted; after bladesetting is completed, constant feed rate simulation cutting testing or constant feed force simulation cutting testing is conducted as needed. Accordingly, a large number of testing materials can be saved, and the testing cost is reduced; a saw cutting simulation testing device is wide in application, people only need to make adaptive change on the blade holder, and then the device can be applicable to simulating testing of band saw blades of various specifications; the influence caused by the factors such as equal altitude and tooth amount error of the band saw blade manufacturing process onthe testing process is eliminated, abrasion resistance and tooth-shaped cutting force of single sawtooth are detected directly, and meanwhile data is stable.

The invention relates to a coping saw load testing device which is characterized in that the testing device comprises a mounting rack (1), a magnetic powder clutch (2) and two rollers (6, 7). The magnetic powder clutch (2) is installed at the outer side of the mounting rack (1), with the output end (3) connected with the roller (6) through a unilateral bearing; and the saw blade of the coping sawto be tested is arranged in the clearance between the two rollers and is clamped by the two rollers. In the process of testing the coping saw, the testing device entirely employs the magnetic powder clutch and the unidirectional bearing to simulate the load under the practical working condition and no real cutting material is used in the testing process. Therefore, the testing device can improve the testing efficiency, save testing material and reduce the testing cost and is simple and convenient to operate.

The invention relates to an impact energy test of a metallic weld seam and a calculation method. The calculation method comprises the following steps: 1. calculating the fine grain proportion of an impact specimen of the metallic weld seam; 2. carrying out the impact test on parent metal and the metallic weld seam; 3. calculating the impact energy and the proportional constant k of the parent metal and the metallic weld seam; and 4. calculating the impact energy of the target metallic weld seam according to the formula (4) e=f*k*E to obtain the impact energy e of the target metallic weld seam. The invention can reduce trivial repeatability tests, save a large quantity of test materials and lower the test cost.

The invention relates to a method for preparing an isometric crystal high temperature alloy casting alloy / ceramic interface reaction test sample, which comprises the following steps of: preparing a shell mold in which ceramic cores are arranged by the traditional investment casting process; heating the shell mold in a heater of a directional solidification vacuum induction furnace to different temperatures at which alloy / ceramic interface reaction is expected to be performed, and preserving heat; remelting a high temperature alloy ingot, pouring into a cavity of the shell mold, and pulling the heater out at a certain speed to form directional solidification castings or test samples with the cores; and cutting the directional solidification castings or test samples at different heights to acquire data of alloy and ceramic which react at the same temperature for different time. The method has the advantages that: the interface reaction time can be steplessly changed according to sampling positions, so that test efficiency is improved; the interface reaction results of the ceramic cores with different components can be obtained in one module at the same time; and the interface reaction condition can be visually observed by a microscope, so that reaction products and a reaction mechanism are determined, and the actual production of the isometric crystal castings is instructed.