173 results about "Mechanical stretching" patented technology

The invention discloses a six-link mechanical arm device with adjustable degree of freedom. The six-link mechanical arm device comprises a mechanical arm connecting seat, the upper end of the mechanical arm connecting seat is connected with a high-power motor, the upper end of the high-power motor is connected with a rotating rod, the left end of the rotating rod is connected with a fixed shaft bending rod, the left lower portion of the fixed shaft bending rod is connected with a mechanical stretching and lifting rod, the lower end of the mechanical stretching and lifting rod is connected with a manipulator connecting rod, the lower end of the manipulator connecting rod is connected with a clamping manipulator, the rotating rod is connected with the fixed shaft bending rod through an adjustable rotating shaft, a telescopic cylinder is arranged between the lower end of the rotating rod and the left end of the fixed shaft bending rod and connected with the fixed shaft bending rod through a cylinder connector, and the left end of the fixed shaft bending rod and the lower end of the mechanical stretching and lifting rod are connected with a direction adjuster. The six-link mechanical arm device solves the problems that only the direction of a clamping portion of an existing six-link mechanical arm can be adjusted, and the directions of other links are manually adjusted, so that the mechanical arm is insufficient in flexibility when in operation.

The invention discloses a flexible shearing-anti-shearing test fixture which comprises clamp bodies, a pull rod, a guide rod, a linear bearing, a pressing plate and a shearing knife. Meanwhile, the invention also discloses a shearing testing method of the flexible shearing-anti-shearing test fixture. The flexible shearing-anti-shearing test fixture and the shearing testing method thereof have thefollowing beneficial effects: the shearing and anti-shearing tests of a board can be realized without the need to replacing parts; and shearing testing of boards with different thicknesses and thin plates in a thickness direction can be realized. The distance of the shearing knife plane can be adjusted by replacing the fixture shearing knife; and the mechanical properties of the board under the double-load stretching-shearing effect at different distances can be tested. On the basis of the pull rod structure, the fixture can be installed at a universal mechanical stretching testing machine tocarry out shearing and anti-shearing tests. The two clamp bodies employ a reverse symmetric mounting structure and the pull rod is installed at the symmetric central line of the fixture assembly, so that the influence on the test result by the unbalance loading is reduced effectively.