Guangdong JSWAY CNC Machine Tool Co., Ltd. since 2004.
Maintenance 101 For CNC Lathe Machine Shops
CNC lathe manufacturing is widespread throughout the component manufacturing industry worldwide as more and more demand is placed on higher production, lowered costs and increased quality requirements on industrial manufactured components. Several companies, however, turn to the deployment of used CNC lathes as a means to reduce their capital equipment costs. While this is a help in improving the bottom line of many companies, the down side of this method is that one has be very vigilant when it comes to keeping these pieces of equipment in proper working order so that production schedules are not compromised and quality levels are not sacrificed. This means that there is increased pressure on maintenance personnel to establish and follow proper courses of action. In this article, we will describe the three basic maintenance procedures that come into play in CNC lathe machine shops.
The first step involves routine maintenance. In this procedure, one schedules a frequency, be it every day, every so many days, every shift or any other frequency depending upon the age of the machines and the demands of the shop. Routine maintenance procedures may involve changing coolants, cleaning chip pans, inspecting and adjusting safety mechanisms, changing or filling hydraulic oil, etc. and their goal is to try to prevent breakdowns.
The second maintenance procedure involves preventative maintenance. Preventive maintenance involves inspecting belts, adjusting, repairing or replacing components that have not yet failed but are known to fail within a short period. Preventive maintenance involves developing a history of breakdown of components from past history, allowing for catching of problems before they happen.
Finally, breakdown maintenance procedures come into play when a component has already failed, thus shutting the production line down. As one can imagine, this type of action can be very costly due to down time involved in production that can get aggravated if the necessary replacement parts are not readily available.
One needs to strive to avoid breakdown maintenance as much as possible by concentrating on routine and preventive maintenance procedures because the latter two are significantly less expensive than the former.
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Methods to Reduce the Impact of Force-Induced Deformation
To minimize the impact of force-induced deformation on the stability of Swiss-type lathes and enhance machining accuracy and stability, the following measures can be taken:
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Improving Precision and Service Life through Fixture Adjustment and Maintenance
Fixture Adjustment Methods:
Fixture Maintenance Methods:
By properly adjusting and regularly maintaining fixtures, the machining accuracy and service life of Swiss-type lathes can be effectively improved, ensuring efficient and stable production processes.
The stress in a machine tool bed can influence machining quality in several ways:
Machining Accuracy
Deformation and Displacement: Stress in the bed can cause structural deformation, which in turn affects the positional accuracy of various machine components. For example, insufficient rigidity at the tailstock support of the bed may lead to positional deviations of the tailstock center, with maximum displacement deformation reaching up to 0.13465 mm. Such deformation directly impacts the relative positioning between the tool and the workpiece, resulting in machining errors.
Differences in Machining Effects with Different Power Head Configurations
Single Spindle vs. Dual Spindle: Single-spindle Swiss-type lathes usually come with one side power head and are suitable for machining relatively simple parts. In contrast, dual-spindle lathes can be equipped with more power heads and can even perform simultaneous machining on the main and secondary spindles, significantly improving machining efficiency and complexity.
Side Tool Post vs. Horizontal Tool Post: Power heads with a side tool post structure perform better when machining difficult-to-chip materials, while those with a horizontal tool post structure are more efficient for machining easy-to-cut materials.
In summary, the power heads of Swiss-type lathes offer significant advantages in machining accuracy, efficiency, complexity, and adaptability. Different power head configurations can be selected based on specific machining requirements to achieve the best machining results.