3results about How to "Accurately and securely fixed" patented technology

This utility model discloses a screw nut internal thread grinding machine, comprising: a bed, a fixed worktable on the front side of the bed, a headstock fixedly mounted on the left side of the worktable, and a movable center support on the right side of the worktable; a chuck for clamping the workpiece is mounted at one end of the headstock; a movable dual-axis worktable is mounted on the rear side of the bed, a movable grinding wheel head is mounted on one side of the dual-axis worktable, and a grinding wheel dresser is mounted on the other side; a retractable and rotatable grinding wheel grinding device is mounted at the front end of the grinding wheel head, and a grinding wheel drive device is connected to the grinding wheel grinding device. The bed of this utility model adopts a rectangular structure and is a grinding wheel head movable structure, which, compared with the traditional T-shaped structure machine tool with a movable worktable, has advantages such as high structural rigidity, fast dynamic response speed, good thermal stability, high machining accuracy, and small footprint.

The utility model discloses a kind of end mould fixed subassembly, including end mould fixing part;End mould fixing part is along the longitudinal direction of end mould and is located at the outside of end mould, and is detachably connected with the end mould;The top of the end mould fixing part is respectively detachably connected with side mould back frame, and the bottom of the end mould fixing part is detachably connected with bottom mould.The utility model also discloses a formwork system comprising end mould fixed subassembly.The end mould fixed subassembly provided by the utility model can determine the connection position of end mould fixed subassembly and side mould back frame according to the length variation range of the beam to be prefabricated, satisfy the prefabricated construction of any beam length, ensure the accurate and reliable of end mould fixed position, and thus ensure the dimensional accuracy of beam body forming.

The utility model discloses a tension testing device for a cable. The tension testing device comprises a test board; the stretching unit is arranged in the test bench, the stretching unit is used for stretching the two ends of the cable, the stretching unit is provided with a fixing assembly, and the fixing assembly is used for fixing the two ends of the cable; and the hoisting unit is arranged in the test bench, and the hoisting unit is used for hoisting the center of the cable. According to the utility model, the stretching unit is matched with the fixing assembly, so that the two ends of the cable are accurately and stably fixed, the tension is applied, the tension is uniformly and adjustably applied, the accuracy of test data is ensured, and the hoisting unit simulates a suspension stress scene in actual use of the cable and moves synchronously with the stretching unit; the multi-directional stress test of the cable is realized, the performance of the cable is reflected more truly, meanwhile, the guide assembly provides stable guidance for the hoisting unit, the hoisting process is ensured to be stable, and test errors are reduced.