Guangdong JSWAY CNC Machine Tool Co., Ltd. since 2004.
Mounting Wood On The Wood Lathe: Using A Glue Block
While one of the great advances in woodturning in recent years has been the development of the four jaw chuck to mount wood for turning, the price tag on a good chuck is a shock to many turners. In fact the price for a decent four jaw chuck often accedes the price of many starter lathes. One of the things that a wood turner needs to remember when going into faceplate turning is the use of the old fashioned glue block for holding wood.
The use of the glue block arises from the desire to not have screw holes observed in the bottom of such items as bowls and platters. Generally such an item is made by first rough turning it from green wood and then letting it dry in the shop for some time. Later it is remounted to the wood lathe and finish turned. It is during this remounting that it may be screwed to the faceplate, thus leaving holes in the finished product. These holes then have to be filled or covered in some way. In addition, the length of the screws determines a certain depth of wood that cannot be used or the tools would hit the screws themselves.
A simple solution, and one centuries old, is the use of a glue block to hold the wood to the lathe. First the bottom of the bowl is flattened using a plane or other tool. Second, a waste block of wood is screwed to the faceplate. Third the waste block is flattened. Third, the waste block is glued to the bottom of the bowl using carpenter's white glue.
Generally a piece of craft paper is glued between the waste block and the bowl. This enables the bowl to be finish turned and then a chisel blow between the block and the bowl splits the paper down center. Then the waste paper can be sanded from the bottom of the bowl and the bottom finished. If desired, the paper could also be removed from the waste block and it could be used again.
There are a few draw backs to this system. While glue has a great hold but it needs to be clamped and let dry for at least eight hours. Also, the wood used has to be dry so this can not help with green turnings. In addition there is the fuss of sanding away all that glue and paper, a combination known for quickly clogging sand paper.
Thankfully, a couple of modern glues rise to the occasion. When turning dry wood such as a dried bowl blank, hot glue can be used to glue the wood block to the bowl. Withing a couple of minutes it is ready to mount on the lathe and turn. Either the block can be parted from the blank with the lathe running or the whole assembly can be taken off and the waste block removed with a a sharp rap of a chisel at the glue line. Any remaining glue is easily pealed off.
Similarly a medium thick cyanoacrylate glue can be used to bond a green blank to a waste block. The glue is applied to the waste block and accelerator to the blank and the two are pressed together. Again, a couple of minutes are sufficient to hold the work for turning and again a sharp blow at the glue line will separate them after the turning is done.
Modern adhesives simply allow the old methods to work in today's shops. While the technology advances us a little we are still working in the historic fashion. The old ways may not always be the best, but they certainly work and work well.
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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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The booth of JSWAY Company attracted the attention of many professional visitors. Through professional explanations and demonstrations, the team members successfully conveyed to customers JSWAY Company's technological advantages and innovation capabilities in the field of CNC machines. Their positive performance not only enhanced JSWAY Company's brand image but also laid a solid foundation for the company's further expansion in the Southeast Asian market.
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.