The ultrasonic vibration laser cladding method is a material-saving and green to fabricate super abrasive structured grinding wheels. However, the mechanism of vibration’s effect on movement behavior grains in process has not been clarified. To address this, impacts grain distribution were experimentally studied, numerical simulation was introduced simulate process. A two-dimensional Gaussian cross-section heat source model developed, its energy density conformed both space time. simulations...

In recent years, laser cladding technology has been widely used in surface modification of titanium alloys. To improve the wear resistance alloys, ceramic-reinforced nickel-based composite coatings were prepared on a TC4 alloy substrateusing coaxial powder feeding technology. Ti (C, N) ceramic was synthesized situ by adding different contents (10%, 20%, 30%, and 40%) TiN, pure powder, graphite, In625 powder. Thisestudy showed that small TiN particles decomposed directly formed phase, while...

A temperature compensation methodology comprising a negative coefficient thermistor with the characteristics of piezoelectric material is proposed to improve measurement accuracy sensing based devices. The disk characterized by using disk-shaped structure and also used verify effectiveness method. measured output voltage shows nearly linear relationship respect applied pressure introducing method in range 25–65 °C. As result, maximum observed be improved 40%, higher temperature, more...

Robust and accurate pose estimation in long-term localization is crucial to autonomous driving. In this paper, we dealt with absolute a LiDAR feature map multi-sensor measurements. We proposed tightly-coupled fusion method fixed-lag smoothing. A sliding window of recently maintained states estimated by minimizing joint cost function. This function includes residuals global registration relative kinematic constraints from an IMU wheel encoders. addition, enhance the robustness our improving...

Ultrasonic vibrations were applied to weld Ni-based metallic glass ribbons with Al and Cu manufacture high-performance crystalline metal composites accumulating formation characteristics. The effects of ultrasonic vibration energy on the interfaces composite samples studied. enabled solid-state bonding metals. No intermetallic compound formed at interfaces, did not crystallize. hardness modulus between respective values additive manufacturing can combine properties metals broaden application...

Components with super-smooth freeform surfaces are being applied more and extensively in various fields. Among the valuable non-traditional finishing processes for generating that have been developed, two-axis vibration assisted polishing process has attracted great attention from some scholars recent years. However, existing process, vibrational coupling occurs between traverse axial directions vibrating body causes actuating tool to rotate, which limits effect. To solve above-mentioned...

Design of an off-axis system using the Wassermann-Wolf (W-W) differential equations can effectively eliminate spherical aberration and coma problem; however, it is complicated time consuming to calculate discrete point coordinates on freeform mirror surfaces due multiple numbers reference transformation in design process. This paper presents improved W-W-differential-equations-based method for three-mirror systems. First, reduce number coordinate transformations, a geometric relationship...

The abrasives of traditional grinding wheels are usually randomly arranged on the substrate, reducing number effective abrasive grains involved in machining during process. However, there some problems such as uneven distribution chip storage space, high temperature, and easy surface burn. In trying to address this issue, an ultrasonic vibration 3D printing method is introduced fabricate structured CBN (Cubic Boron Nitride) wheel. effects fabricated process parameters, overlap rate, scanning...

Fe-based metallic glasses are amorphous alloys with high strength, hardness, and excellent corrosion resistance; however, the immaturity of processing methods has prevented their wide application in industrial production. glass parts were manufactured employing pneumatic injection additive manufacturing this study. An evenly dispersed stable powder slurry a solids content 50% was prepared firstly. Then printed. The printed dried, debinded, sintered for strengthening. deformations relative to...

A new method compensating geometric error components of a four-axis horizontal machine tool is presented in this paper. Homogeneous transformation matrices (HTMS) and conversion are integrated the compensation strategy. mathematical model which contains 29 established based on HTMS errors X, Y Z directions obtained through calculation. The three compensated by shifting corresponding axis. But configuration X-axis, Z-axis, B-axis, C-axis without Y-axis, so need to be converted into C...

In this study, the principle of stretch forming combined with roll forming(SRF) is proposed, to present availability process, it simulated by Method Finite Element Analysis(FEA) comparing traditional forming(SF) (SRF), result shown that roller covered rubber rolling sheet metal benefit formed part, such as Von mises stress, thickness thinned and coincidence curve part are studied.

Ultra-precision machining has higher requirements for the performance of abrasive tools, but traditional grinding wheel some problems such as irregular grain arrangement, limited chip space, and high temperature. Therefore, a structured suitable ultra-precision is proposed. In this study, laser cladding method ultrasonic vibration technology were combined to study preparation process wheel. Firstly, quality evaluation system printing layer was established, shape coefficient dilution rate...

Abstract Optical lenses, mirrors and other precision optical components will inevitably produce mid-high spatial frequency errors in polishing, which cause light scattering different degrees, seriously affect the imaging performance of system such as contrast reflectivity. The pseudo-random path has high direction randomness, effectively suppressing machined surface's periodic polishing marks. In this study, a mesh surface planning method based on Matrix Angle Based Flattening (MABF)...