2021.11.26
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The field of CNC machine tool processing is no stranger to fixtures. The processing of CNC machine tools requires fixtures to assist and stabilize, ensure the accuracy of processed parts, reduce labor intensity of workers, and improve production efficiency. There are many types of fixtures, and different fixtures are used to process different workpieces. The following editor will introduce to you the specific functions of the clamps and what are the commonly used clamps.
1. What are the functions of the fixture
1. The machining accuracy of the workpiece can be ensured stably: when the workpiece is clamped by a fixture, the position accuracy of the workpiece relative to the tool and the machine tool is guaranteed by the fixture. Unaffected by the skill level of workers, the processing accuracy of a batch of workpieces tends to be consistent.
2. It can reduce auxiliary man-hours and improve labor productivity: the workpiece can be clamped with clamps, and the workpiece can be quickly positioned and clamped without aligning. Significantly reduces auxiliary man-hours; clamping the workpiece with a fixture improves the rigidity of the workpiece, so the cutting amount can be increased. Multi-piece, multi-station clamps can be used to clamp the workpiece, and the high-efficiency clamping mechanism is adopted. These factors are conducive to improving labor productivity.
3. It can expand the scope of use of the machine tool and realize multiple functions in one machine: the use of special fixtures can change the purpose of the original machine tool and expand the scope of use of the machine tool to realize multiple functions in one machine. For example, after installing the boring mold fixture on the lathe or radial drilling machine, the box hole system can be boring; the special fixture can also be used to change the lathe into a broaching machine to give full play to the role of a general-purpose machine tool.
4. Reduce the labor intensity of workers: It is convenient and fast to clamp the workpiece with clamps. When pneumatic, hydraulic and other clamping devices are used, the labor intensity of workers can be reduced.
2. Introduction of commonly used fixture types
1. Wanneng combination fixture is suitable for small batch production or development of small and medium-sized workpieces for milling on the CNC milling machine.
2. The special milling fixture is a fixture specially designed and manufactured for a certain item or several similar workpieces. It is generally used when mass production or development is absolutely necessary.
3. The multi-station fixture can clamp multiple workpieces at the same time, which can reduce the number of tool changes and facilitate one-sided processing. Loading and unloading the workpiece on one side helps to shorten the preparation time. Improve productivity, more suitable for medium batch production.
4. Pneumatic or hydraulic clamps are suitable for large production batches, and the use of other clamps is particularly labor-intensive and labor-intensive. It can reduce the labor intensity of workers and increase productivity, but the structure of this type of fixture is more complicated. The cost is often higher, and the manufacturing cycle is longer.
5. Vacuum fixtures are suitable for workpieces with larger positioning planes or larger sealable areas. Some CNC milling machines (such as wall milling machines) are equipped with a general vacuum platform, and when installing the workpiece, they can deal with a rectangular blank with a regular shape. You can directly use a special rubber strip with a hollow or solid circular cross-section with a certain size requirement, and insert it into the sealing groove of the fixture. Then put the blank on and turn on the vacuum pump to clamp the blank.
1. What are the functions of the fixture
1. The machining accuracy of the workpiece can be ensured stably: when the workpiece is clamped by a fixture, the position accuracy of the workpiece relative to the tool and the machine tool is guaranteed by the fixture. Unaffected by the skill level of workers, the processing accuracy of a batch of workpieces tends to be consistent.
2. It can reduce auxiliary man-hours and improve labor productivity: the workpiece can be clamped with clamps, and the workpiece can be quickly positioned and clamped without aligning. Significantly reduces auxiliary man-hours; clamping the workpiece with a fixture improves the rigidity of the workpiece, so the cutting amount can be increased. Multi-piece, multi-station clamps can be used to clamp the workpiece, and the high-efficiency clamping mechanism is adopted. These factors are conducive to improving labor productivity.
3. It can expand the scope of use of the machine tool and realize multiple functions in one machine: the use of special fixtures can change the purpose of the original machine tool and expand the scope of use of the machine tool to realize multiple functions in one machine. For example, after installing the boring mold fixture on the lathe or radial drilling machine, the box hole system can be boring; the special fixture can also be used to change the lathe into a broaching machine to give full play to the role of a general-purpose machine tool.
4. Reduce the labor intensity of workers: It is convenient and fast to clamp the workpiece with clamps. When pneumatic, hydraulic and other clamping devices are used, the labor intensity of workers can be reduced.
2. Introduction of commonly used fixture types
1. Wanneng combination fixture is suitable for small batch production or development of small and medium-sized workpieces for milling on the CNC milling machine.
2. The special milling fixture is a fixture specially designed and manufactured for a certain item or several similar workpieces. It is generally used when mass production or development is absolutely necessary.
3. The multi-station fixture can clamp multiple workpieces at the same time, which can reduce the number of tool changes and facilitate one-sided processing. Loading and unloading the workpiece on one side helps to shorten the preparation time. Improve productivity, more suitable for medium batch production.
4. Pneumatic or hydraulic clamps are suitable for large production batches, and the use of other clamps is particularly labor-intensive and labor-intensive. It can reduce the labor intensity of workers and increase productivity, but the structure of this type of fixture is more complicated. The cost is often higher, and the manufacturing cycle is longer.
5. Vacuum fixtures are suitable for workpieces with larger positioning planes or larger sealable areas. Some CNC milling machines (such as wall milling machines) are equipped with a general vacuum platform, and when installing the workpiece, they can deal with a rectangular blank with a regular shape. You can directly use a special rubber strip with a hollow or solid circular cross-section with a certain size requirement, and insert it into the sealing groove of the fixture. Then put the blank on and turn on the vacuum pump to clamp the blank.