Chisel, as I explained a little when introducing hand tools, is one of the most commonly used manual woodworking tools. Even if you use woodworking machinery most of the time, you cannot do without a good chisel. This week we will introduce chisels and their maintenance.
As a beginner, the most commonly used chisel should be a flat chisel. There are 3/4 inch, 1/2 inch and 1 inch chisel. With these three specifications, even a good beginner can be prepared. Set up. You can buy cheaper ones at a lower price, because you will have to practice polishing later, there will be more chances of loss, and you can buy expensive ones when you become more skilled. It is best to choose a hit-resistant chisel (iron ring or plastic at the tail), so you can safely hit with a hammer when you use it.
The chisel has two sides, one is inclined and the other is straight. When chiseling, remember that the area of the face-to-face is what you will save, otherwise the face-to-face is to be removed. Before chiseling, draw the line first, and then use a chisel or a scribe to make/mark out the dents. When chiseling, be careful not to be greedy and gouge a little, so that the chisel is not so fast and the chiseling will be easier and more precise Degree is better.
Chisels are mainly used in several directions, horizontal, diagonal and vertical.
When it is horizontal, it is mainly used to clean the plane. When using it, hold the chisel handle with your main hand (right-handed is the right hand, left-handed is the left-handed), and the other hand controls the direction of the chisel. The hand that controls the direction is as close as possible to the cutting edge. , This is more accurate. It is also worth noting that beginners use uneven force, which can easily cause the lower back of the clean surface, because the chisel is generally harder when pushing it to the back.
When slanting, pay attention to the slope downwards. The downward slope allows the chisel to move horizontally, so that it will not go into the wood block too much due to excessive force. One more thing to pay attention to is the direction of the wood grain. The cutting direction of the chisel should be opposite to the wood grain. If it is along the grain, it is easy to cause tearing and damage the wood block.
Remember to keep the chisel perpendicular to the block when it is vertical. At this time, you generally need a hammer to assist you. Be sure to be firm when you strike. Don’t strike too many times, as the chances of making mistakes will be reduced. When holding the chisel in your hand, you can try to hold it as low as possible, so that the chisel can be placed more precisely where you need to chisel, and secondly, the chisel can be more perpendicular to the workpiece when hammering.
Keeping the sharpness of the chisel is very important. The sharper the chisel, the more precise you can achieve when processing wood, because you can control it better. When does it need to be polished? On the face of the chisel, use your fingers to feel whether the blade is rolled back, if any, you need to sharpen it. Generally, I use whetstone to polish, and the bevel can be used with a sharpener to adjust the angle of the polishing.
Having said that, the following is the actual operation promised a few days ago. I found the teak wood tested in the last few weeks, which is relatively easy to process. First check whether the blade of a flat chisel is straight, because cheap chisels may not be straight enough. The inspection can be done with a ruler (this method can also be used to test whether the surface of the wooden block is flat in the future). If the chisel is uneven, it must be polished to a level position, otherwise it will affect the accuracy of the tool.
After the tools are no problem, you can use a line to draw the position to be chiseled off on the wooden block, and also draw the depth of the side. Then use a clamp to fix the wooden block, and then use a chisel to cut the scratches along the line, so that the fibers of the wooden block can be cut, and then only moderate force can limit the processing range when chiseling. When scratching, you can choose to press the chisel down with your bare hands using body pressure, or put the chisel on the line and hit it with a hammer. When aiming at the line, remember to keep the hand holding the chisel as close as possible to the cutting edge, and pay attention to the direction of the chisel slope should be the direction of the waste. If you are not confident enough, you can put the chisel in the line a little while scribing, because more chisel cannot be saved, and less chisel can be repaired slowly. In addition, pay attention to the verticality of the chisel when scribing. If you are not confident, you can use a square ruler as a reference.
After cutting the wood fibers in the processing area with a chisel, you can use the chisel to diagonally match the hammer to remove the unwanted wood blocks. Pay attention to the inclined surface downwards and do not use excessive force. After diagonal chiseling, you can chisel at the place where the line was previously marked to ensure that the outer wood fibers have been completely cut off. Then you can lay down the flat chisel and clean up the unwanted sawdust. If you didn't check whether the flat chisel is straight or not at the beginning, it will be difficult to do this step, and the things you make will be inaccurate, so I'd rather slow down and ensure the integrity of the tool.
In short, woodworking chisel is one of the most commonly used hand tools, you must practice more to master it, pay more attention to the direction of the wood grain and think more when using it. You can buy cheap chisels to practice at first, but be aware that cheap chisels do not work well. Remember to check first before using them, or else you will be mad. You can prepare some materials first and practice your hands when you have time.