The WBM 205 CDR is based on the WBM eco and has recently developed a self-rotating workpiece support surface, which is especially suitable for grinding single and double ends of superhard materials. The two workpieces on the rocking table of the grinding machine drive the supporting surface and can rotate while rocking. The advantage of this grinding method is that the flatness and parallelism of the blade are extremely high, below 2μm, and the surface of the blade surface is very fine, the surface The roughness is below 0,1μm, which is close to the polishing range. With the continuous online dressing system ROTODRESS, the fine-grain grinding wheel is always evenly sharp, achieving the highest dimensional and topographical accuracy. The new design also makes the grinding machine WBM 205 CDR more compact and practical.
The Vantage 5-axis CNC Grinding Center WAC 735 CENTRO's "360° x 360°" axis motion principle and innovative flexible fixture design enable a single clamping, all-round machining of the periphery, groove, cutting groove and negative Chamfer. With the theme of processing modern new materials, we have used the disc-shaped coarse-grained, bowl-shaped fine-grain combination grinding wheel for the first time to efficiently grind the perimeter of the PCD insert. First, when the blade is coarsely ground, the wheel line contacts the workpiece, which reduces the grinding pressure and improves the coolant entering the contact area between the grinding wheel and the workpiece, thereby significantly improving the quality of the cutting edge. After rapid rough grinding, the grinding machine can be ground with a bowl-shaped grinding wheel at a large blade adjustment angle, with the grinding direction at a variable angle to the cutting edge for maximum edge quality. The newly developed C-clamp AXR has axial and radial support, which greatly enhances the rigidity when grinding PCD. Due to the use of a disc-shaped grinding wheel, it also needs to be trimmed, so the grinding machine adds a high-precision dressing shaft.
The Vantage 4-axis CNC Peripheral Grinding Center WAC 715 QUATTRO is ideal for high-efficiency grinding of cutting tools such as indexable inserts for minimum grinding times and minimum assist times, as well as maximum use. As an upgraded version of the WAC 715 SCALAR, a grinding machine commonly used worldwide, the WAC 715 QUATTRO has the same basic construction as the 5-axis grinding center WAC 715 CENTRO. The main innovation of the grinding machine is the use of hydrostatic bearings. By increasing the rigidity and shock resistance, even super-hard materials can be processed at high speed, while achieving no chipping and highest cutting edge quality. Compared to previous grinding machines, there is also an innovation: the expansion of the feed axis (X-axis) stroke, which greatly increases the processing range of the grinding machine. The central prism is integrated into the center of the circular table, making the blade extremely accurate in the centering range of the grinding machine. The new auxiliary measuring system KOMPENSA 3D can numerically measure complex geometries and calculate 3D measurement data to obtain the cutting width or the measured workpiece thickness in the machine.
After grinding the end face and the periphery of the CBN and PCD blades, the SPECTRA 820 laser can be used to machine the three-dimensional complex features of the blade, such as chip flutes and negative chamfers. The laser machine is suitable for high-precision machining of microscopic shapes. A diode-supplied highest quality solid-state laser produces a 20-40 μm diameter concentrating drive with a frequency of up to 100 kHz, ensuring the highest removal rate. Its pulse time is in the nanosecond range, thus avoiding thermal damage to the workpiece. Laser power components can be replaced and easy to maintain. The laser machined workpiece moves under the static laser beam. This innovative shaft design and laser precision focusing, combined with nano-concentration technology, enables micro-machining of three-dimensional shapes. A further advantage is that the machining time is very short, because of the direct drive linear motor, the acceleration can reach 5g. The adjustment, centering, and finished product measurement of the workpiece is done by a measuring head mounted on the machine tool, and the measuring head is also involved in monitoring the machining process. The new modular clamping system allows the user to quickly change the clamping according to different workpieces. The loading and unloading system installed in the machine automatically loads and unloads the workpiece from the tray, and it is easy to connect with the grinding machine and the packaging machine to form a flow operation. The laser machine is programmed through 3D-CAD/CAM memory and can read CAD data of the user's common exchange format, such as IGES or STEP.
In addition, based on the innovative slot filtration principle, the cooling system FLUIDMASTER 730 achieves ultra-pure filtration. The system is compact in construction, small in floor space, self-closing work, can be connected to different machine tools, and even can be supplied to multiple grinding machines.
As a grinding system supplier, in addition to providing grinding machines, accessories, cooling systems and application technology, Vant offers grinding tools that are ideal for grinding superhard materials, especially for grinding PCD and CBN, the newly developed MATRIX series. The grinding wheel has excellent grinding performance during high-speed feed, and at the same time achieves excellent cutting edge, together with the best matching high-precision wear-resistant diamond dressing roller, the complete set provides perfect grinding solution.
A ball check valve is a check valve in which the closing member, the movable part to block the flow, is a spherical ball. In some ball check Valves, the ball is spring-loaded to help keep it shut. For those designs without a spring, reverse flow is required to move the ball toward the seat and create a seal. The interior surface of the main seats of ball check valves are more or less conically-tapered to guide the ball into the seat and form a positive seal when stopping reverse flow.
Ball check valves are often very small, simple, and cheap. They are commonly used in liquid or gel minipump dispenser spigots, spray devices, some rubber bulbs for pumping air, etc., manual air pumps and some other pumps, and refillable dispensing syringes. Although the balls are most often made of metal, they can be made of other materials, or in some specialized cases out of artificial ruby. High pressure HPLC pumps and similar applications commonly use small inlet and outlet ball check valves with both balls and seats made of artificial ruby, for both hardness and chemical resistance. After prolonged use, such check valves can eventually wear out or the seat can develop a crack, requiring replacement. Therefore, such valves are made to be replaceable, sometimes placed in a small plastic body tightly-fitted inside a metal fitting which can withstand high pressure and which is screwed into the pump head.
There are similar check valves where the disc is not a ball, but some other shape, such as a poppet energized by a spring. Ball check valves should not be confused with Ball Valves, which is a different type of valve in which a ball acts as a controllable rotor to stop or direct flow.
A diaphragm check valve uses a flexing rubber diaphragm positioned to create a normally-closed valve. Pressure on the upstream side must be greater than the pressure on the downstream side by a certain amount, known as the pressure differential, for the check valve to open allowing flow. Once positive pressure stops, the diaphragm automatically flexes back to its original closed position.
A swing check valve or tilting disc check valve is check valve in which the disc, the movable part to block the flow, swings on a hinge or trunnion, either onto the seat to block reverse flow or off the seat to allow forward flow. The seat opening cross-section may be perpendicular to the centerline between the two ports or at an angle. Although swing check valves can come in various sizes, large check valves are often swing check valves. The flapper valve in a flush-toilet mechanism is an example of this type of valve. Tank pressure holding it closed is overcome by manual lift of the flapper. It then remains open until the tank Drains and the flapper falls due to gravity. Another variation of this mechanism is the clapper valve, used in applications such firefighting and fire life safety systems. A hinged gate only remains open in the inflowing direction. The clapper valve often also has a spring that keeps the gate shut when there is no forward pressure. Another example is the backwater valve (for sanitary drainage system) that protects against flooding caused by return flow of sewage waters. Such risk occurs most often in sanitary drainage systems connected to combined sewerage systems and in rainwater drainage systems. It may be caused by intense rainfall, thaw or flood.
A stop-check valve is a check valve with override control to stop flow regardless of flow direction or pressure. In addition to closing in response to backflow or insufficient forward pressure (normal check-valve behavior), it can also be deliberately shut by an external mechanism, thereby preventing any flow regardless of forward pressure.
A lift-check valve is a check valve in which the disc, sometimes called a lift, can be lifted up off its seat by higher pressure of inlet or upstream fluid to allow flow to the outlet or downstream side. A guide keeps motion of the disc on a vertical line, so the valve can later reseat properly. When the pressure is no longer higher, gravity or higher downstream pressure will cause the disc to lower onto its seat, shutting the valve to stop reverse flow.
An in-line check valve is a check valve similar to the lift check valve. However, this valve generally has a spring that will 'lift' when there is pressure on the upstream side of the valve. The pressure needed on the upstream side of the valve to overcome the spring tension is called the 'cracking pressure'. When the pressure going through the valve goes below the cracking pressure, the spring will close the valve to prevent back-flow in the process.
A duckbill valve is a check valve in which flow proceeds through a soft tube that protrudes into the downstream side. Back-pressure collapses this tube, cutting off flow.
A pneumatic non-return valve.
Multiple check valves can be connected in series. For example, a double check valve is often used as a backflow prevention device to keep potentially contaminated water from siphoning back into municipal water supply lines. There are also double ball check valves in which there are two ball/seat combinations sequentially in the same body to ensure positive leak-tight shutoff when blocking reverse flow; and piston check valves, wafer check valves, and ball-and-cone check valves.
Check Valves, Water Check Valves, Brass Check Valves, Sanitary Check Valves
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