Repair of guillotine shears
Guillotine shears come with a mechanical and hydraulic drive. In both types of machines, during long-term operation, the plain bearings (bronze bushings) of the knife beam drive shaft wear out. Also, due to the wear of the knife bar guides, the gap between the knives increases, which leads to an incorrect cut. In the process of work, you need to monitor the status cutting edges knives (grind in time).
For scissors with pneumatic start, the pneumatic distributor and pneumatic clutch may fail, and rubber seals wear out, which leads to a loss of cutting power.
For scissors with a mechanical start, the mechanism for switching on the stroke of the knife beam wears out. Also, due to breakdowns of the limit switches, the knife beam may stop in the wrong position or not stop at all. There are other less common failures.
If you need to repair guillotine shears - contact us and we will try to help you.
You will find the machine repair algorithm in the section REPAIR .
Replacement of guillotine shear blades.
Fig.1
The most common faults in guillotine shears, both hydraulic and mechanical are associated with knives, since it is they who take on the full load during the operation of the machine. Knives get dull, get chipped or even split, and here you can not do without removing old and installing new or polished knives. Let's consider this operation on the example of repair of hydraulic guillotine shears HA 3225 (Fig. 1).
Fig.2
Fig.3
The repair procedure is as follows.
First, we remove the protective grille, after which we can examine in detail the damage to the upper and lower knives along the entire cutting line (Fig. 2, 3).
Fig.4
We unscrew the fixing bolts of the lower knives and change them with back side machine (Fig. 4).
The guillotine for cutting metal is recognized by experts as one of the most popular types of equipment used in many industries.
1 Why do I need a guillotine for cutting metal and fittings?
Under the guillotine is understood special machine on which cutting and cutting is carried out various metals, cable paper, fiberglass.
It is suitable for both large industrial enterprises, and for small productions, differs in durability, rather simple and really reliable work.
Such a machine does not require long preparation of metal for cutting, provides high speed and the quality of the process.
The blade of the unit is sharpened in such a way that after processing there is no scale on the edges of the material, the edge is very smooth without burrs, jams, notches. Optimum guillotine cutting for work with simple contours metal parts small area and relatively small thickness. At the same time, even thicker steel hot-formed and the installation of the appropriate power cuts without any problems, guaranteeing a high-quality vertical cut without bevels.
Such equipment is used in enterprises engaged in the manufacture drainage systems, profiled sheets, various profile products, roofing and facade elements, ventilation systems. The guillotine is also widely used to perform various works in the field of shipbuilding, construction, and mechanical engineering. In general, it can be used to perform cutting of any metal and products from it when it is not required to cut holes and shapes of a complex type.
2 Varieties of modern guillotines - the choice is yours
Today, consumers are offered cutting machines metal sheets and products of three main types:
- hydraulic;
- with electromechanical drive;
- manual.
The simplest is, of course, the manual guillotine. It is suitable for processing materials whose thickness does not exceed 1 millimeter. The unit will not be able to process large volumes of metal, but it will cope with small batches of products without problems. That's why manual machines usually intended for small firms.
At times more powerful are units equipped with a mechanical drive. They cut thick steels (up to 16 mm thick) without any problems, they are characterized by the presence of several special systems that greatly simplify and speed up the cutting process:
- hydraulic pressure control;
- support complex;
- conveyor automatic principle action, designed to receive processed metal products.
And in many large enterprises, guillotines are additionally mounted with machine numerical control controllers, which ensure ease of operation of the unit and complete safety of its use.
The most common are hydraulically driven installations. They have a number of advantages:
- slow wear of the guillotine elements;
- high power and speed of operations;
- guarantee of equipment protection against overloads;
- low level of vibration and noise during the operation of the unit;
- ease of maintenance (repair of a guillotine for cutting metal may not be required for years if the necessary preventive maintenance and replacement are carried out cutting tool on such an installation within the recommended time).
It is also worth noting the minimum probability (almost zero) of getting a marriage when using guillotine shears, as they ensure the exact observance of the specified proportions. After the guillotine, the products are obtained exactly with the geometric dimensions that were specified, and with smooth edges. At the same time, the formation of metal chips is not observed during the cutting process, which means that the operation can be safely called economically profitable.
Based on the foregoing, it is recommended to use hydraulic or electromechanical equipment for those enterprises that regularly produce large batches of metal products. Such guillotines require little labor and guarantee a high-quality cut.
3 Technology of operation of guillotine units
The machine is equipped with two knives. One of them is motionless, the other makes circular motions. Metal products and sheets are delivered to the cutting site of the installation from roller tables. After that, the operator of the unit turns on a massive guillotine knife, which, under pressure, falls on the metal in the designated place and cuts it into the required sections. terms of reference parts.
High edge quality and unique precision geometric parameters process is provided through the use of programmable equipment. If, according to the conditions of processing, it is required to obtain finished products with a minimum level of deformation, it is desirable to connect a CNC controller to the guillotine. It, acting in cooperation with the regular units of the machine, makes it possible to quickly and accurately perform a large number of metal cutting operations in a short time.
The clamping mechanism of the unit is responsible for the cutting accuracy. Moreover, the cutting process on guillotine installations can be performed transversely and longitudinally with respect to metal product fed to the machine for processing at different angles. A competent cutting of sheets is ensured by the functioning of the guillotine guides and cutting knife having an elongated shape.
As can be seen from the description, the technology for using the guillotine is very simple. The benefits of such equipment are obvious - "operational" cutting of different thickness metal blanks, low power consumption of operations, the ability to produce serial cuts and produce products of any not very complex configuration ("kerchiefs", rectangles with different sizes sides of the product, standard stripes, and so on).
4 Popular guillotines for cutting sheets - a small overview
The cost of machine tools for cutting metal is determined by their specific type (it is clear that a manual guillotine will always cost less than analogues with a hydraulic or electromechanical drive), the depth and thickness of the cut that the installation provides, as well as the brand under which the equipment is produced.
In Russia, units of the following manufacturers are in demand:
