The invention discloses a manufacturing method for a cast aluminum type engine blocking cover. The manufacturing method for the cast aluminum type engine blocking cover includes the following steps that firstly,
casting is performed, wherein the blocking cover is cast through a
metal mold
casting method, the bottom face of one side of the blocking cover is a plane, and the other side of the blocking cover is a to-be-machined
assembly face; secondly, an end face is turned, wherein the blocking cover is clamped through a turning clamp, the
assembly face of the blocking cover is turned, the turning clamp comprises a
flange sleeve clamping plate used for ejecting the bottom face of the blocking cover, and a blocking cover top plate used for clamping the
assembly face of the blocking cover, and certain
machining allowance is reserved for the assembly face of a blank of the blocking cover; and thirdly, hole drilling is performed, wherein the assembly face, machined in the second step, of the blocking cover is placed in a blocking cover installing and clamping device in a whole face attaching manner, the angle and the pressing force of the blocking cover are adjusted by adjusting an
angular direction adjusting device and a tight holding force adjusting device, and hole drilling is performed. The invention provides the manufacturing method avoiding sunken deformation of the blocking cover in the end face turning work procedure and thus guaranteeing the planeness of the end face of the blocking cover.