Telescopické kryty – co to jsou a proč jsou důležité?

Telescopic covers are protective elements used in industrial machines, designed to protect moving parts from contaminants, mechanical damage, and premature wear. Thanks to their design, they effectively protect guideways, lead screws, and other components responsible for the precise operation of the devices.

Telescopic Covers – What Are They and Why Are They Important?

The use of telescopic covers is essential in the metalworking industry, CNC production, and many other sectors where machines need to operate in harsh conditions. Telescopic covers not only extend the lifespan of machines but also reduce the risk of failure, which translates into lower maintenance costs and higher production efficiency.

Telescopic Covers in Industrial Machines

Telescopic covers play an important role in protecting machine mechanisms from external factors. Their tasks are:

Protecting against dust, chips, and liquids – in machining processes, fine chips and coolant fluids are produced, which can negatively affect the operation of machines. Telescopic covers effectively block the access of these contaminants.

Preventing mechanical damage to guideways – industrial machines operate with high precision, and even minor damage to a guideway can affect the quality of machining. Telescopic covers minimize this risk.

Reducing operating costs – protecting machine components means less frequent maintenance and replacement, which lowers maintenance costs and production downtime.

Increasing operator safety – well-designed telescopic covers prevent accidental contact between workers and moving machine parts, increasing workplace safety.

Materials Used in the Production of Telescopic Covers

Telescopic covers can be made from various materials, but the most commonly used are:

Stainless steel – particularly recommended in environments where there is a large amount of lubricating and cooling fluids. Stainless steel is resistant to corrosion, ensuring long service life even in harsh conditions.

Cast iron – less commonly used but still applied in certain applications. It is heavier than steel but offers high wear resistance and mechanical stability.

Aluminum alloys and other metals – in some cases, lightweight metals are used, particularly where the mass of the cover is important for the dynamics of machine movement.

The choice of material depends on the machine's working conditions and the environment in which the cover will be used.

Accessories Ensuring Proper Operation

For telescopic covers to effectively perform their function, they are often equipped with additional components that improve their durability and operational efficiency. The most important accessories include:

- Sliding pads – reduce friction and ensure smooth movement of the cover.

- Rollers and guideways – allow for precise and light movement of the covers, which is particularly important for fast machines.

- Shock absorbers – reduce the impact force between the segments of the cover, extending its lifespan.

- Oil scrapers and wipers – remove excess coolant, oil, and contaminants from the guideways, preventing them from entering the interior of the cover.

Thanks to the proper selection of materials and accessories, telescopic covers can operate reliably for a long time, effectively protecting machine components and ensuring their reliability.

Production of Telescopic Covers

The production of telescopic covers is a process that requires a precise approach and full adaptation to the specific needs of customers. Each machine, its working conditions, and requirements are different, so the design and production of covers must be flexible to meet these individual expectations. Companies engaged in the production of telescopic covers, such as Metal Gennari, respond to these needs by creating "custom-made" solutions and ensuring the highest quality of workmanship.

Each telescopic cover is designed with the machine's specifications in mind, where it will be used. The design process begins with a thorough analysis of the customer's requirements, the machine's working conditions, and any special needs, such as the speed of movement or the presence of lubricating and cooling substances. Based on this, solutions are created that will not only be efficient but also durable.

Designers adjust the shape, dimensions, and materials of the covers to the specific application requirements. With this individualized approach, telescopic covers become the optimal solution for protecting machines while minimizing operating costs and maximizing safety and production efficiency.

The Importance of Precision and Material Quality

The quality of materials used in the production of telescopic covers is crucial for their performance and longevity. High-quality materials not only provide better protection against mechanical damage and contaminants but also increase resistance to corrosion, wear, and other harsh working conditions.

In the case of large industrial machines, where covers must operate under difficult conditions (e.g., at high sliding speeds or with intensive use of lubricating fluids), it is particularly important to use materials resistant to corrosion and high temperatures. For this reason, stainless steel is one of the most commonly chosen materials for the production of telescopic covers. Additionally, precise manufacturing and proper material processing guarantee the cover's reliability over a long period of use.

Examples of Telescopic Covers Made from Stainless Steel

Stainless steel is an ideal material for telescopic covers that need to operate in environments with a high presence of lubricating and cooling fluids. Thanks to its corrosion resistance, stainless steel ensures the longevity of the covers even in tough industrial conditions. Metal Gennari, as a manufacturer of telescopic covers, offers solutions made from this material, tailored to customers' requirements regarding shape, size, and machine working conditions.

An example could be a stainless steel telescopic cover for a machining machine that operates in a high-humidity environment with heavy use of coolant. By using stainless steel, the cover ensures protection against corrosion, and its design is suitable for high loads and frequent movements. Stainless steel telescopic covers are also easy to clean and maintain, contributing to their longevity and reliability.

Repair of Telescopic Covers

Repair of telescope shields is an important process that extends their lifespan and maintains machines in full working condition, thus minimizing the risk of breakdowns and associated costs. Professional diagnostics and expert repairs are the key to maintaining the high efficiency of shields, especially in an industrial environment where telescope shields play a vital role in machine protection.

Diagnostics and scope of possible repairs

The repair process of telescope shields begins with thorough diagnostics, which helps to identify damages and assess the technical condition of the shield. Experts in companies specializing in these repairs, such as Metal Gennari, conduct a detailed inspection to understand which components of the shield need repair or replacement.

Depending on the degree of wear and the type of damage, repairs may include various tasks. Mechanical damage or material wear, such as from friction, may require the replacement of seals, rollers, or shock absorbers. On the other hand, issues related to damage caused by friction or wear due to lubricants may require replacing protective elements such as oil scrapers or guides. Performing a comprehensive repair restores the shield to full functionality.

Which components can be replaced in telescope shields?

During the repair of telescope shields, many key components that are prone to damage during operation can be replaced. Here are some of them:

• Oil scrapers: Telescope shields equipped with scrapers (both brass and PVC) help remove excess oil, preventing its accumulation and settling. Replacing worn-out scrapers is one of the most common repair tasks.

• Rollers and shock absorbers: These components are responsible for the smooth movement of the shield. Over time, they may wear out, and replacing them restores optimal functionality to the telescope shield.

• Guides and other accessories: Damaged guides or other structural components can also be repaired by replacement. Proper guidance of telescope components is crucial for the shield’s efficiency.

The repair of telescope shields allows for precise adjustment of components depending on the degree of wear, ensuring their long-lasting and reliable operation.

Testing and quick delivery after repair

After completing the repair, all telescope shields undergo thorough testing to check their functionality and durability. Companies like Metal Gennari use simulators and test stations that allow for conducting performance trials in conditions close to real-world operations. This ensures that any potential discrepancies are detected, and the repaired shields will operate flawlessly.

After testing is complete, the repaired telescope shield is ready for fast delivery to the customer. The repair completion time in many cases is only a few days, which helps minimize downtime and maintain the continuity of industrial machines. Fast delivery is an essential part of comprehensive service, highly valuable in situations where time is critical.

Special applications of telescope shields

Telescope shields are indispensable in many industrial sectors, and their role is not only to protect machines from contaminants but also to ensure their long-term, trouble-free operation. As machine tools and industrial devices become increasingly advanced, new requirements for the design of telescope shields are emerging. Adapting these shields to new technologies is essential to maintain their efficiency in dynamically changing working conditions.

How to adapt shields to modern machine tools?

Modern machine tools often require telescope shields that meet higher demands related to working speed and specific operational conditions. Therefore, telescope shields must be adapted to parameters such as varying motion speed, large amounts of cooling liquids, and complex operations occurring in machine tools.

Designing telescope shields for modern machines begins with a thorough understanding of the client’s specific needs. It is necessary to consider how fast the machine elements move, the contact with lubricating fluids, and which materials will provide optimal protection. This is why materials such as stainless steel, known for its high resistance to oils and chemicals, are often used. Designers also frequently incorporate innovative solutions such as additional accessories that reduce friction and improve the smoothness of movement.

Solutions for large amounts of liquids and high speed

In many modern machine tools, the presence of large amounts of lubricating or cooling liquids can pose additional challenges. Although these liquids are essential in the machining process, they can lead to premature wear of telescope shields if not properly controlled. To prevent this, designing telescope shields takes into account special materials and accessories.

Telescope shields designed for such conditions are typically made of stainless steel, which ensures longevity and resistance to corrosion. In environments where large amounts of liquid are present, it is also important to use oil scrapers (in brass or PVC versions) to prevent excessive oil accumulation. With these solutions, telescope shields not only protect the machine from damage but also ensure long-term and efficient operation in harsh conditions.

In high-speed sliding conditions, telescope shields must be designed to minimize the risk of damage. In such situations, special shock-absorbing accessories are used in the shields to prevent impacts between components, ensuring their durability.

Examples of special telescope guides

For high-speed machining, it is necessary to use specialized design solutions such as double pantographs or more advanced telescope guides. An example of such a solution is a telescope guide for a parallel lathe, equipped with a double pantograph and five rows of brass guides that interlock. This type of solution is used in situations where there is a high sliding speed because the pantographs and guides ensure even opening of the elements, reducing the risk of damage or jamming. With such systems, it is possible to achieve greater consistency of telescope shield components and increase their resistance to damage, leading to longer shield life.

Similar innovative solutions are designed within technical offices, which develop custom telescope shields tailored to exceptional production conditions. Thanks to these solutions, telescope shields can meet the demands of modern machine tools, even in harsh conditions involving large amounts of liquid or high-speed motion.

High-speed telescope shields

Telescope shields working in high-speed machines are a crucial element in ensuring the long-term and trouble-free operation of machines. Depending on the speed of the machine elements' movement, the design of the shield must be adapted to specific requirements to minimize the risk of damage, increase durability, and ensure smooth movement.

How does the sliding speed affect the design of the shield?

The sliding speed of elements in a machine tool impacts the design of telescope shields. In machines where the sliding speed does not exceed 15 m/min, telescope shields do not require special damping measures, making their design simpler and more standard. However, for higher speeds, particularly when they reach values between 15 to 30 m/min, it becomes necessary to use special damping elements to prevent impacts between the individual sections of the shield.

By applying solutions such as shock absorbers, seals, and appropriate accessories, telescope shields can operate in more demanding conditions, providing longer lifespan and stable performance. For higher speeds (above 30 m/min), the shield design must also include elements that allow for uniform opening of components and prevent them from stopping.

Solutions for shields working at speeds of 15–60 m/min

Telescope shields operating at speeds ranging from 15 to 60 m/min must be designed with the specific needs of such machines in mind. For speeds between 15 and 30 m/min, as mentioned earlier, the key is to use damping systems that reduce the impact force between the shield sections. In such designs, it is crucial that the telescope elements are properly balanced, and the materials used in their construction are durable enough to withstand intense movement and contact with lubricating liquids, which may occur in such machines.

For speeds between 30 and 60 m/min, designers must employ more advanced mechanisms, such as pantographs, which prevent shield stoppages and ensure uniform opening of the components. Additionally, using special guides and interlocking mechanical elements helps maintain the stability of the shield, reducing the risk of it becoming stuck or blocked.

The importance of pantographs and interlocking guides

In the context of telescope shields working at high speeds, pantographs and interlocking guides play a crucial role in ensuring smooth and stable movement. The pantograph, mounted on the top of the shield, operates on the principle of a "concertina" movement, preventing any stoppages and ensuring even opening of the shield components. This mechanism is extremely important in machines working at higher speeds, where movement stability is essential.

Meanwhile, interlocking brass guides, such as those used in special telescope guides for parallel lathes, further strengthen the entire structure, preventing jams and ensuring better consistency between the shield sections. By using this solution, telescope shields working at high speeds can endure prolonged, intense motion without the risk of mechanical damage.

The combined use of pantographs and interlocking guides makes telescope shields more resistant to shocks and reduces the risk of damage, significantly improving the performance and lifespan of the entire system.