1. Field of the Invention
The present invention relates generally to a machine tool, and more particularly to a grinding machine for automatedly grinding an internal diameter and an end surface of a workpiece with low cost and high efficiency.
2. Description of the Related Art
As the level of modern industrial machining is heightened, a variety of automated digital machine tools become more and more popular and important. Among them, the internal diameter grinding machine is one of the most popular ones. There are numerous similar grinding machines in the present market, but most of them have to change their cutters before grinding an internal diameter of a workpiece (e.g. bearing). The machine has to be stopped in the replacement step of the cutters to reduce the efficiency of production. As a result, there is still much space for improvement of the grinding machine.
1. The operator still has to manually operate the handle 18 to move hydraulic arm 16 to grind the workpiece, increasing the costs of time and manpower.
2. Because the hydraulic arm 16 does not correspond to the end surface of the workpiece but from its upper side for machining, the operator has to manually adjust the position of end surface grinding disk 17 on the hydraulic arm 18 after grinding, increasing the costs of time and manpower.
The primary objective of the present invention is to provide a grinding machine, which can grind an internal diameter and an end surface of a workpiece. The grinding machine includes a chuck for longitudinal movement, two parallel grinding devices corresponding to the chuck, two grinding tools for grinding the internal diameter and end surface of a workpiece respectively automatedly.
The secondary objective of the present invention is to provide a grinding machine, which increases the efficiency of grinding process without manual operation. The grinding machine includes an automated control system for controlling all of the steps of the grinding process, such that neither adjustment nor replacement step is manually necessary. The grinding machine of the present invention takes less time and fewer costs in the grinding process, and the automated control system replaces the manpower, such that the grinding machine of the present invention is a highly efficient machine.
As shown in
The machine base 20 includes a transverse rail 21 at an end thereof and two parallel longitudinal rails 22 and 23 at the other end thereof.
The chuck device 30 has a rotary chuck 31 with an independent power source and a transverse member 32 mounted on the transverse rail 21 of the machine base 20. The chuck assembly 30 is controllable by the automated control system 60 to move along the transverse rail 21 precisely.
The grinding device 40 is mounted on the machine base 20 and corresponding to the chuck device 30. The grinding device 40 has a longitudinal member 41 mounted on the longitudinal rail 23 of the machine base 20, and an end surface grinding tool 42 with an independent power source. The grinding device 40 is controllable by the automated control system 60 to move along the longitudinal rail 23 precisely.
The grinding device 50 is mounted on the machine base 20 and corresponding to the chuck device 30. The grinding device 50 has a longitudinal member 51 mounted on the longitudinal rail 22 of the machine base 20, and an internal diameter grinding tool 52 with an independent power source. The grinding device 50 is controllable by the automated control system 60 to move along the longitudinal rail 22 precisely.
As shown in
Next, the automated control system 60 commands the grinding device 50 to move back to an initial position thereof to stop the internal diameter grinding tool 52 command the chuck device 30 to align with the grinding device 40 precisely, and then the grinding device 40 is controlled by the automated control system 60 to drive the end surface grinding tool 42 to grind the workpiece held on the chuck 31 automatedly.
After the end surface of the workpiece is grinded, the automated control system 60 commands the grinding device 40 to move back, the end surface grinding tool 42 to stop, and the chuck device 30 to move back. As the coordinated operations indicated above, the grinding machine automatedly grinds the internal diameter and the end surface of the workpiece in a single step. There is no manual operation in the grinding process for adjustment and replacement. The grinding machine of the present invention spends less time and fewer costs in the grinding process, and the automated control system replaces the manpower, such that the grinding machine of the present invention is a highly efficient machine.
Alternatively, the grinding devices each include a transverse member, and the machine base includes a transverse rail mounted to the transverse member of each grinding device, so that an interval between the grinding devices can be adjusted by the automated control system. As a result, there are greater grinding ranges of the end surface and the internal diameter of the workpiece for the grinding devices to grind.