The process of making an ordinary open-ended wrench requires material and heat treatment
The blank after the rough machining after quenching, good milling opening angle of 780 DEG C after heating, in salt water (local spanner mouth) quenching, tempering 250 DEG ~350 deg. This will ensure that the wrench has a certain degree of hardness, wear and tear does not hurt the nut, wrench the rest of the parts have a certain toughness, can withstand torsion load. (machining process omitted)
If it's not a wrench, then. Material selection carbon tool steel T10A or T12A.
Open wrench production method: wrench outline drawn, a stretch just fine.A wrench is used for rotating with thread binding elements (such as bolts, nuts and other hand tools), including at least six angle wrench can rotate six angle bolts, the fixed wrench to rotate six angle or six angle head nut, wrench, spanner, wherein the fixed and movable spanner wrench because have an opening, it is referred to as the wrench, however, is sometimes limited by the use of the occasion, the wrench can not rotate continuously, when the application of force to rotate an angle, must be temporarily taken out from the binding element, and then reset with binding element, again force the rotating spanner, however, so the operation the way is quite troublesome, often need to go through a series of repeated operation, to complete the binding element removal or screw fixation. In order to improve the existing wrench operation, sometimes not lack of continuous rotation needs to be taken out, the utility model aims to provide a direct reverse rotation, continuous operation with convenient wrench.
