Horizontal computer numerical control (cnc) machining device for crankshaft

A horizontal computer numerical control (CNC) machining device for a crankshaft, comprising:

• a horizontal machining workbench, wherein the crankshaft is provided on the horizontal machining workbench, and
• a milling spindle adjusting device provided on a side of the horizontal machining workbench along a length direction of the crankshaft;
• wherein a milling spindle is fixedly provided on the milling spindle adjusting device, and the milling spindle adjusting device comprises an X-axis adjusting mechanism, a Y-axis adjusting mechanism, and a Z-axis adjusting mechanism, wherein the X-axis adjusting mechanism, the Y-axis adjusting mechanism, and the Z-axis adjusting mechanism are perpendicular to each other, and are configured to adjust positions of the milling spindle relative to the crankshaft along an X-axis, a Y-axis, and a Z-axis, respectively;
• a C-axis headstock is provided on the horizontal machining workbench and configured to drive the crankshaft to rotate;
• the C-axis headstock is provided with a position locking mechanism;
• the position locking mechanism is configured to lock a peripheral position of the crankshaft relative to the milling spindle, and the position locking mechanism comprises an encoder assembly configured to feed back a detection signal and a brake assembly configured to lock the crankshaft;
• and a controller is provided in the C-axis headstock and configured to control the brake assembly to perform a corresponding action according to the detection signal fed back by the encoder assembly;
• a drive assembly comprises a fifth servo motor, wherein the fifth servo motor is connected to a headstock timing pulley through a conveyor belt;
• the headstock timing pulley is connected to a drive shaft through a transmission shaft;
• the transmission shaft is connected to a transmission case;
• the encoder assembly comprises an encoder connected to the drive shaft through an encoder timing pulley, and the encoder has an output end electrically connected to the controller;
• the brake assembly comprises a brake pad fixedly provided on the drive shaft;
• the C-axis headstock is provided with a brake caliper mated with the brake pad;
• and an output end of the controller is connected to the brake caliper to control the brake caliper to lock or release the brake pad;
• the encoder is configured to convert a rotation angle of the drive shaft into a pulse count and send the pulse count to the controller;
• the controller has a first preset value;
• when the pulse count sent to the controller by the encoder reaches a value corresponding to the first preset value, the pulse count means that the drive shaft already drives the crankshaft to rotate to a designated position;
• and at this time, the controller controls the brake caliper to clamp the brake pad to lock the crankshaft;
• the horizontal machining workbench further comprises a central carrier, wherein the central carrier is provided on a workbench body and configured to support a journal of the crankshaft;
• the horizontal machining workbench further comprises a tailstock;
• the horizontal machining workbench comprises the workbench body;
• wherein a first slide rail at a side of the tailstock is provided on the workbench body;
• the tailstock is slidably connected to the first slide rail through a tailstock base;
• a first locking element is provided on the tailstock base and configured to fix the tailstock to the first slide rail;
• the central carrier is slidably connected to the workbench body;
• and a bottom of the central carrier is provided with a second locking element configured to fix the central carrier to the workbench body;
• and
• the tailstock and the central carrier are configured to reliably support and position the crankshaft.