Sophia Delgado
Nail cutters, also known as nail clippers, are a common tool used for nail care and grooming. While the concept of nail trimming has been around for centuries, with references found in ancient texts, the first patent for fingernail clippers was filed in 1875 by Valentine Fogerty. Today, nail clippers are widely available and come in various designs, but the fundamental process of manufacturing these tools involves unrolling coil-like stainless steel, feeding it into a pressing machine, and performing processes such as cutting holes, impressing marks, and bending blade edges. The upper and lower blades are then welded together, heated, and cooled to enhance hardness. The final product is a simple yet essential tool for maintaining personal hygiene and the appearance of one's nails.
| Characteristics | Values |
|---|---|
| Material | Stainless steel |
| Process | Coil-like stainless steel is unrolled and fed into a pressing machine |
| Processes such as cutting holes, impressing a mark, and bending blade edges are carried out | |
| Blade Creation | Upper and lower blades are welded together with electricity |
| Hardening | Heated to 1000°C and cooled rapidly to enhance hardness |
| Softening | Reheated to 180°C to soften the weld for the handle/spring |
| Sharpening | Tip is pressed to a fine belt to create a sharp edge |
| Assembly | Blades are attached to the lever/hold-down part |
| Testing | Sharpness is tested by cutting paper |
| Packaging | Nail clippers are attached to a plastic case and packed |
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What You'll Learn
Stainless steel coil unrolled and fed to the pressing machine
To make a nail cutter, stainless steel coil is first unrolled and fed into the pressing machine. This process is called coil-fed progression pressing, and it is a cost-effective manufacturing method that can produce simple and complex metal pressings with high precision and quality.
The coil-like stainless steel is unrolled and fed into the pressing machine, where several processes are carried out to form the upper and lower blades of the nail clippers. These processes include cutting holes, impressing a mark, and bending the blade edges. The blades are then welded together, with electricity flowing from the electrodes to melt and join the surfaces together.
The welded nail clipper is then heated to around 1000°C and rapidly cooled to enhance the hardness of the stainless steel. It is then reheated to about 180°C to soften the weld, as this area will become the spring of the nail clipper. This process is crucial for ensuring the nail clipper can open and close smoothly.
The blades of the nail clipper are then sharpened by pressing them against a finer belt, giving them a sharp edge for the first time. The sharpness of the blades is determined by the gap, or "lap," between the upper and lower blades. The precise adjustment of this gap is critical, as it affects both the sharpness and strength of the nail clipper.
Finally, the nail clipper is assembled and packaged, ready for use.
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Upper and lower blades welded facing each other
The process of making a nail cutter involves several steps, one of which is welding the upper and lower blades so that they face each other. This step is crucial to ensuring the nail cutter's effectiveness and durability. Here is a detailed description of this specific stage of the process:
First, the coil-like stainless steel is unrolled and fed into a pressing machine. Several processes are then carried out in molds, such as cutting holes, impressing marks, and bending blade edges. This is when the upper and lower blades are formed and prepared for welding.
The welding process involves joining the upper and lower blades so that they face each other. This is achieved by flowing electricity from electrodes while pressing the joint surface hard. The electrical current generates heat, causing the stainless steel surfaces to melt and fuse together. This specific method is called spot welding, commonly used in car body installation.
After welding, the nail cutter is heated to a temperature of about 1000°C in a furnace. It is then rapidly cooled to water temperature, which enhances the hardness of the stainless steel. This step is crucial in improving the strength and durability of the blades.
Following the cooling process, the weld is softened by heating it again at a high temperature of approximately 180°C. This step, known as "setting the part back," is essential for ensuring the smooth opening and closing of the nail cutter. It involves softening the area around the weld using a high-frequency wave, as this section will function as a spring.
The final steps involve smoothing the blade surfaces and adjusting the blade positions. High-speed glass beads are propelled by forced air to smooth out any imperfections on the blades. The upper blade is then carefully adjusted to be slightly offset from the lower blade, creating a gap known as the "lap." This subtle displacement prevents the sharp edges of the blades from bumping into each other and becoming damaged. The precise adjustment of the lap determines the nail cutter's sharpness and overall performance.
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Spot-welded nail clipper heated to 1000°C, cooled, then reheated to 180°C
To make a nail cutter, you can follow these steps:
Firstly, coil-like stainless steel is unrolled and fed into a pressing machine. Several processes are then carried out in molds, such as cutting holes, impressing marks, and bending blade edges. This is how the upper and lower blades of the nail clipper are formed.
The upper and lower blades are then welded together, a process known as spot welding. This involves applying pressure to the joint surface while flowing electricity from electrodes, causing the stainless steel to melt and fuse.
The spot-welded nail clipper is then heated to a temperature of about 1000°C in a furnace. It is then rapidly cooled to water temperature, which enhances the hardness of the stainless steel.
Following this, the nail clipper is reheated to a temperature of approximately 180°C. This process, known as "set the part back," softens the weld using a high-frequency wave. This step is crucial for ensuring the nail clipper can open and close smoothly, as the softened area will become a spring in the handle.
After these heating and cooling processes, the blades of the nail clipper are matted and smoothed. High-speed glass beads are propelled by forced air to strike the blades and refine their surface.
The final steps involve adjusting the position of the upper blade relative to the lower blade to create a "'lap' structure. This gap prevents the blades from bumping into each other and enhances the sharpness and strength of the nail clipper. The blades are then sharpened, cleaned, dried, and assembled with the other components to complete the nail clipper.
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Blades smoothed with high-speed glass beads
Glass bead blasting is a process where small spherical glass beads are propelled at high speed to smoothen and clean a surface. The process is also known as bead blasting or glass bead blasting. It is used to remove surface contaminants, improve surface texture, and create a smooth and uniform finish.
In the context of nail clippers, the blades of the nail clipper are hit with high-speed glass beads by the force of air. This process is important for ensuring the nail clippers can open and close smoothly. The glass beads help smoothen the surface of the blades, removing any bumps or imperfections that may cause damage or dull the blades over time.
The process of glass bead blasting for nail clippers involves heating the blades to a high temperature of about 180°C. This softening of the metal allows for the precise adjustment of the blade's position. The upper blade is moved slightly away from the lower blade to avoid damage during use and to maintain sharpness.
The use of glass beads in this process is advantageous due to their non-abrasive nature. Glass beads can effectively clean and polish delicate surfaces without causing damage. They are also environmentally friendly, non-toxic, and reusable, making them a cost-effective and sustainable option.
Overall, the process of smoothing nail clipper blades with high-speed glass beads is a crucial step in the manufacturing process, ensuring the blades remain sharp, smooth, and functional over an extended period.
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Blades adjusted for sharpness and strength
The sharpness and strength of a nail cutter depend on the precise adjustment of the blades. The upper blade is moved slightly from the lower blade to create a gap called a "lap". This displacement requires great subtlety as the distance between the blades affects the performance of the nail clipper. If the gap is too small, the displaced blade edge may revert to its original position when clipping nails and become damaged. On the other hand, if the gap is too large, the nail clipper will lose its sharpness. The tip part of the nail clipper is sharpened by pressing it to a finer belt. After this process, the blade is cleaned and dried before moving on to the next assembly stage. The engagement of the blades characterizes the sharpness of the nail clippers. When the hard blade edges come into contact with each other, they are worn away and transformed.
The nail clippers are then tested for sharpness by cutting test paper with them. The blades are also smoothed by hitting them with high-speed glass beads using the force of air. When viewed from the side, the upper blade should not be perfectly in line with the lower blade. This structure, called a "lap", is important for the functionality of the nail clipper. The weld is softened by heating it with a high-frequency wave as this part of the nail clipper will act as a spring. This process is called "set the part back" and is crucial for the smooth opening and closing of the nail clipper.
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Frequently asked questions
Coil-like stainless steel is used to make nail cutters. The steel is fed into a pressing machine where processes such as cutting holes, impressing a mark, and bending blade edges are carried out.
The upper blade is moved slightly from the lower blade to avoid damage from bumping into each other. The blades are then attached to the hold-down part, called the lever. The nail cutter is then tested for sharpness by cutting test paper.
The nail cutter is moved to a furnace and heated to about 1000°C. It is then cooled to water temperature to enhance the hardness of the stainless steel. The weld is then softened by heating it again at a high temperature of about 180°C.
