Guangdong JSWAY CNC Machine Tool Co., Ltd. since 2004.
Metalworking Lathes In The Wood Shop: Woodturners
With the growing interest in metal working there has been an increase in the availability of both new and used metal lathes on the market. While the techniques of turning metal and wood are different, the machines are similar enough to open a new world of turning for the woodturner as well as give new directions for turners of metal as well.
Owning a metal lathe opens up new avenues of obtaining tools for the woodturner. Faceplates can be made in various sizes and for specialty reasons. Tool shafts can be made in various lengths and sizes and easily fitted to handles both wood and metal. Hard to find replacement parts for old and out of market lathes can be fashioned.
At the same time, metal lathes can be used for turning wood. This requires some refitting but the parts can be made by hobby metal workers. Larger metal lathes may have Morse taper #3 head stocks and tail stocks while #1 and #2 are more common for wood lathes. This means that either adaptors have to be made and commercial spur and tail centres used or spur and tail centres will need to be made to fit the lathe. Actually, this is not needed for the tail centre as live tail centres are readily available for metal lathes and are generally more robust than those for wood lathes because of the heavier weights usually turned.
Metal turners use tools fixed on a tool holder that is mounted securely on a table that is directed with wheels that move it in the x and y axes to remove metal from the rotating piece. While there are rare wood turners that can manipulate the tool in this way, most turn freehand. For this a tool rest and banjo will need to be fashioned allowing the use of hand tools.
All that is now needed is to remember that wood and metal are two different materials with different needs and affect the workshop in different ways. Oil is used in turning metal. Oil, unless it is the oil used in finishing a particular turning, can stain and ruin a nice turning. Similarly some metals react with some woods to introduce a discolouration. Thus it is necessary to be scrupulous in cleaning up all the metal shavings and all the oil from metal turning before turning wood.
At the same time, many woodturners work with green or wet wood and water hurts metal. The shavings from turning wood must be cleared from the metal lathe before turning metal.
On the other hand, this really means that the shop and in particular the lathe must be kept clean. This is a good idea at all times for workshop safety and the use of a metal lathe for metalworking and woodturning merely encourages the discipline. In any case it allows for a new dimension and direction for the craftsman turner.
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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:
JSWAY Company’s Professional Team Performance
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Compare manual mills and CNC machine advantages, costs, precision, and applications to choose the right technology for prototyping, job shops, or production.
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.