Professional locksmiths know perfectly well what the scraper is used for and what it is. Another name for the tool is pusher. With this useful mechanical tool, metal parts can be given a high level of strength and minimal roughness. In addition, the scraper is used for surface patterning and edge finishing.
Fixture specifications
The very term "scraping" appeared in our country from Germany. In translation, it means "scraping", which fully corresponds to the essence of the operation. With this processing, all kinds of defects are scraped off the metal surface, which makes it very smooth.
The scrapers used for this procedure are made from tool steel alloys. Their design includes a cutting element and a handle, which can have a three- or four-sided shape. To impart high hardness to the working element of the pusher, it is subjected to a special heat treatment.
In most cases, instruments are standard lengths of twenty to forty centimeters. The width of the cutting element depends on the type of processing and the task at hand. For example, black scraping of production with a tool with a working part width from 15 to 30. The finishing procedure assumes a width of 15 to 20 millimeters.
It also depends on the type of scraping angle of sharpening of the tool tip... Experienced locksmiths recommend using the following angles:
- from 90 to 100 degrees - for operations related to finishing;
- 90 degrees - for finishing (scraping);
- from 75 to 90 - for black scraping.
It should also be remembered that the sharpening angle must be measured relative to the tool axis.
The geometric characteristics of the scraper are not determined by GOSTs, although some inexperienced craftsmen are trying to find similar information in the standard 1465-80, which does not apply at all to scrapers, since it regulates the parameters of files.
Locksmiths are currently using different types of scraping devices, which have a lot of differences from each other. Depending on the shape of the cutting element, metal scrapers are divided into shaped, triangular and flat. The cutting part of shaped pushers, in contrast to elements of triangular and flat devices, repeats the shape of the processed surface.
The triangular scraper is often used to process concave and cylindrical surface areas, and a flat tool is used to finish grooves and grooves. Professionals can use ring and disc tools that can machine round parts and wide surfaces.
By design, scrapers are classified into two- and one-sided, as well as collapsible and one-piece. The most durable are considered to be double-sided models, which are equipped with not one, but two working parts at once.
The cutting element can be curved or flat. Curved pushers are very convenient for working with sharp corners and soft metal alloys.
A few years ago, locksmiths used only hand tools, but now manufacturers produce devices equipped with an electric or pneumatic drive. You still need to operate such devices with your own hands, but they require less physical effort than when using manual scrapers.
Applications of the tool
Scrapers are used for removing the thinnest layer from metal parts... This makes it possible to bring the surface to the optimum level of roughness. A similar technological operation is often used for metal elements, which will then be mobile. These include:
- elements of high-precision devices and machine tools;
- bearing parts;
- all kinds of measuring devices;
- cutting tool blades (they are sharpened with a scraper sharpener).
Versatility is one of the main advantages of pushers. With the use of such devices, engravings are applied, the edges are processed and the old coating is removed. Scrapers are used even in the cosmetic field by manicure specialists, but such tools have their own design and functional features.
For a long lasting and efficient scraper, you need to adhere to some rules for its application. One of the most important factors is the choice of tool.
Experts prefer to have at their disposal a whole set of scrapers to solve various problems. You can use a universal attachment with attachments that quickly change depending on the situation.
No need to start scraping, if there are significant defects on the surface of the workpiece in the form of scratches, chips, etc. To begin with, it is better to process it roughly using a milling machine.
After surface preparation, you need to identify the most problematic areas of the product. For this purpose, a layer of paint must be applied to the surface and the workpiece must be drawn over it. As a result, the ridges and irregularities with which you need to start scraping will be painted.
For processing, the element is securely fixed in a vice. Large parts are processed locally. Do not forget that scraping must be started from the most convex parts of the part. Only in this case will the work be successful.
The word scraper is of German origin and means to scrape, this is the name of a three or four-sided mechanical or hand tool, which is sharpened at one end. This term refers to items intended for scraping.
What does such a tool look like and where is it used, how to use this scraping tool? This question may be of interest to many, since in everyday life I have come across this subject more than once.
In any workshop there is always a place and work for a scraper, especially when it comes to old metal and wood surfaces... All scrapers do the dirty work of removing varnish and dirt from the surface in preparation for further work.
Nowadays, the demand for such a tool has significantly decreased, an alternative to this item has appeared in the form of special compositions for paints and varnishes and fan heaters. Chemicals are increasingly used in the treatment of restorations, and hot air is also used for this purpose.
To get a clean and smooth surface, scrapers are the best and safest tools. They do not leave waste hazardous to health after processing, but they work very tedious and painstaking... A good and flawless result is achieved only if the tool is well sharpened.
A scraper is a metal-cutting tool that looks like a rod with cutting edges at the end, which are used for scraping. The cutting parts of the scraper can be triangular, flat or shaped, by their design - solid and with insertable cutting plates.
In modern production, in addition to hand scrapers, electric and pneumatic tools are increasingly used. With the help of a scraper, fine particles can be removed from the metal surface. Tool made of carbon steel, and the cutting ends of the scraper are hardened without tempering to hardness.
- Flat tools are good at machining flat surfaces such as grooves and open grooves. They can have a length from 300 to 400 mm, for coarse scraping the width of the object is from 20-25 mm, in more delicate works - 5-10 mm. The end of the cutting part is usually 2-4 mm in thickness, and the taper angle in the rough version is 70-75 °, for finishing - 90 °.
- Flat double-ended tools can be used for a long time due to their double-ended design. For triangular scraper blades, the shank length ranges from 190 to 510 mm.
- Universal scrapers have replaceable cutting inserts, consist of a holder body, clamping screw, handle, replaceable carbide or HSS cutting insert.
- There are also disc tools that are used to machine wide surfaces. The disc can have a diameter of 50-60 mm and a thickness of 3-4 mm; it is sharpened on a circular grinding machine. They allow the entire tool disk to be used in the processing process, which significantly increases labor productivity.
Scope of application
Conclusion
It is very important to choose the right tool, often you have to buy a whole set of scrapers for the job. If it is a manicure tool, then it needs proper care, after use it must be disinfected and also periodically sharpened.
Locksmith work related to the preparation of metal and wood surfaces by removing irregularities is carried out using a special tool equipped with a cutting edge. Scraping, or grinding, contains different technologies for finishing workpieces for parts, the operation is carried out both directly with devices and using abrasives of different grain sizes. All working processes allow you to get a workpiece with a perfectly smooth surface, scrapers for metal and wood help to create tight adhesion with other parts.
What is a scraper?
A tool designed to remove a thin layer of metal from the surface of a workpiece is used to remove the surface film before soldering or welding elements of a loaded structure, as well as before assembling parts of precision instruments. Using the scraping method, the sharp edge of the locksmith's blade removes the top layer of material 0.01 mm thick.
Metal scraping is also used when sanding wood after processing with other tools. During the cleaning process, the surface is checked with a surface plate covered with a layer of paint. The presence of irregularities is detected by staining individual sections of the workpiece, the removal of which is carried out by repeated scraping of the problem area.
Locksmith scrapers differ:
- A form that is flat, shaped, multifaceted
- A structure that contains replaceable plates
- The number of grinding faces: one-sided, two-sided and three-sided.
By design, the device can be collapsible and one-piece.
Metal stripping tool
A locksmith's scraper is made of a standard length, the width of the blade depends on the type of operation: for roughing, a tool with a blade width of up to 3.0 cm is used, the final stripping is performed with a cutting part 2.0 cm wide. each type of operation:
- 75 0 -90 0 - roughing;
- 90 0 - finishing operation;
- 90 0 -100 0 - finishing stripping.
The sharpening angle of the tool blade is measured relative to the axis of the product handle.
Surface paint
After completing the preparation of the material, the residual irregularities are identified by applying a painted control plate. Scraping paint is made from pigment mixed with any kind of technical oil. As a pigment, azure, blue, red lead or a mixture of soot, autol and kerosene is used. The scraping paint should be of the consistency of a medium thickened paste, and should not run or form lumps. The mixture should lie on the plane of the control plate in a thin, even layer.
Types of locksmith scrapers
The flat-type attachment with three edges or shaped blade is suitable for working with a straight flat surface or sharp corners of the workpiece, it cuts well aluminum, copper and bobbits. The triangular blade tool is used to machine cylindrical type holes in a carbide metal workpiece.
When scraping the surface of parts, the tool used by the principle of scraping and grinding at a certain angle must have replaceable sharpened plates that allow you to form an angle with respect to a flat surface. Operations are most often carried out by a universal scraper, the design of which contains:
- Frame;
- Pen;
- Holder;
- Clamping screw;
- Replaceable plate.
How to scrape properly
The type of scraping does not provide for the preparation of the surface of the material being processed. The work is carried out in a strict sequence of operations:
Working with a metal surface consists of scraping off the bumps. The principle of scraping is to create long sections by sliding the blade and then reducing the amplitude. The direction of movement of the instrument should change gradually and cross. In the process of work, it is recommended to check the level of smoothing of irregularities with a painted plate or a control square 25 × 25 mm.
Surface Inspection Technique
The control square helps you determine the depth of scraping on the surface of a part or workpiece. In the middle of the frame attached to the surface of the part, a control area is highlighted and the number of colored spots is counted. The type of irregularities can be determined by the number of bulges:
- If the number of stains reaches 6, the scraping is rough;
- If there are up to 10 spots, the scraping is clean;
- When the number of spots is not less than 14 - the processing is accurate;
- When the number of stained spots is 22 - jewelry cleaning.
The operation of leveling the face of the parts, the tool and the method of scraping used depends on the type of surface. For the processing of edges, a straight-type device is used, the scraper cleans bent parts with a shaped blade, hard materials are processed with a narrow blade, soft materials and flat surfaces are scraped with a wide scraper and a radius-type blade.
The shape of the blade of the device is selected according to the type of surface, which can be identified by rolling the part over a painted plate. The detected irregularities are removed with a device with a long sharpened edge. The types of scrapers used start their movement from the edge part of the workpiece. After the completion of the operation, a control check is carried out for the purity of processing, for the finishing of which the scraper uses a metalwork assembly tool and a ferrite edge< 1,5 см.
In order for the cutting tool to serve for a long time and help to prepare materials with high quality, it is recommended to pay special attention to the choice of the device. All types of scrapers in the shape of the cutting edge are adapted to perform technological tasks. The best option is to choose a universal type of equipment, the design of which allows you to quickly replace the plates in accordance with the requirements of the technical process.
Due to technical features, different types of scrapers cannot be used on surfaces with large defects and deep scratches. The part must be roughly machined on a milling machine or other grinding equipment. All surface leveling cycles should be completed by checking with a pigment dye control plate.
Scraper. Is this word familiar to you? Most of us may have heard it for the first time. But did you know that this word simultaneously represents tools from different spheres and branches of human activity? Which? Let's find out together.
In contact with
Chabert: what is it?
First of all, let's see how this device is used in plumbing work. So, a scraper in this case is a tool that a locksmith is now widely and actively used for finishing the surfaces of mechanical parts.
What are the benefits of this construction tool? In fact, he plays an important role in such works. It successfully fulfills its main function. It also cleans the metal surface well from existing irregularities. Thus, the surface becomes smooth and comfortable for further work.
Locksmith tool design
The construction looks like this:
- Lever. The handle can be either triangular or tetrahedral.
- Cutting part.
It is customary to make all these necessary devices for performing plumbing work from tool steel. They have a standard length, namely 20 - 40 cm. But the width of the cutting part directly depends on the type of work performed. Also, the type of work affects what kind of sharpening angle will be used by specialists. For example, in finishing operations, it is customary to use a 90 degree sharpening. But, for roughing, it is better to arm yourself with a device with a sharpening of 75 degrees.
Often, the edge angle is measured in relation to its axis.
Areas of use
Such locksmith devices are successfully used today for various metal structures. In most cases, they are used to:
- Cutting tool blades. A sharpener is suitable for the blades.
- Manufacturing of machine parts and parts for high-precision instruments.
- Manufacturing of a wide variety of measuring instruments.
- Manufacturing of sliding bearing elements.
- Manufacturing of special devices that carry out control operations.
Experienced specialists use different types of devices for the mentioned works. Therefore, let's get acquainted with the existing types of this locksmith tool.
Types of locksmith scrapers
There are several types. They differ from each other in appearance. The differences between them are determined by the following parameters:
- The shape of the cutting part. According to the shape of the cutting part, the following types are distinguished:
- Triangular.
- Flat.
- Shaped.
Each shape of the cutting part is used in specific cases and has its own characteristics. So, for example, unlike flat triangular scrapers, shaped ones are able to completely repeat the shape of the surface that is being processed. Therefore, it can be considered more convenient.
As for the necessary advantages, the scraper has a lot of them. The main of them is considered versatility. As shown, it can be used on a wide variety of metal surfaces and structures.
Chabert what it looks like
However, not only such a locksmith tool is called a scraper. A similar word is often found in other areas. For example, in a manicure.
Manicure scraper
As you know, it is thanks to a good manicure and subsequent care that it is possible to keep your nails in good condition. Some are able to perform similar procedures on their own. Others prefer to seek help from special salons. But regardless of where, how and by whom the manicure procedures are carried out, you must have certain tools with you.
Special manicure sets are on sale today. Often, such a set consists of the following tools:
Of all the above, the less well-known is the scraper. Let's get to know him better.
What is a nail scraper?
First of all, a manicure scraper, of course, differs from a plumbing tool. Moreover, it differs not only in appearance, but also in the purpose of use. If the locksmith tool is intended for metal and wood surfaces, then with the help of a manicure scraper, pterygia (a thin skin that grows and appears under the nail plate) is removed, and the scraper also helps to push back the cuticle. Thanks to such procedures, nutrients can penetrate better and deeper directly into the root. In addition, the removal of the pterygium and cuticle prevents the formation of burrs. And the hands themselves look pretty beautiful and, no less important, well-groomed.
What is the manicure device made of? Such an important tool in most cases is made of high-alloy stainless medical steel. Externally, the scraper looks like a small stick with a metal structure at the end.
Types of manicure tools
There are several types of nail scrapers. They differ among themselves not only in shape, but also in size. Let's pay attention to some known parameters by which one type differs from another:
What is the difference between a scraper and a pusher?
A pusher is another tool that is used in manicure. It is often confused with a scraper. It is important to understand that these are two different tools. Since manufacturers often substitute one concept for another, it is important to understand how they differ. The main difference is in their purpose. Pusher only helps to push back the cuticle. The scraper is intended for the final removal of the carousel. Pusher should not be sawed or scraped off. It is a safe tool. Whereas a scraper is not recommended for someone who is poorly versed in manicure.
At the same time, you cannot do without a scraper.
