German DFS tools DFS models DFS prices

DFS tools powered by electric motors or electromagnets, driving the working head through a transmission mechanism, are referred to as power tools. They are hand-held tools that use low-power electric motors or electromagnets as the power source to drive the working head via a transmission mechanism. Power tools are divided into handheld and portable types; handheld power tools are more flexible, convenient, and widely used. Many varieties have become essential tools for production and daily life. There are numerous power tool brands. Based on function and application, they are mainly classified into metal cutting power tools, grinding power tools, assembly power tools, and railway power tools. Common power tools include electric drills, electric grinders, electric wrenches and electric screwdrivers, electric hammers and impact drills, concrete vibrators, and electric planers.

DFS tool classification

1) Squeeze-exhaust suction cups rely on downward squeezing force to expel all air from the suction cup, creating a negative pressure state inside to hold the workpiece. They offer advantages such as simple structure, light weight, and low cost. However, the suction force is not strong, so they are mostly used for workpieces that are not too large in size, thin, and light. 2) Airflow negative pressure suction cups: An airflow control valve injects compressed air from an air pump through a nozzle, forming a high-speed jet that removes air from the suction cup cavity, creating negative pressure to hold the object. If compressed air is available at the worksite, using this type of suction cup is convenient and low-cost. 3) Vacuum pump exhaust suction cups: These utilize an electromagnetic control valve to connect the vacuum pump to the suction cup. When the control valve evacuates air, the air inside the suction cup cavity is removed, creating negative pressure to hold the object. Conversely, when the control valve connects the suction cup to the atmosphere, the suction cup loses suction and releases the workpiece. The suction force of vacuum pump suction cups mainly depends on the suction area and the vacuum level inside the cavity (referring to the thinness of the air in the inner q cavity). This type of suction cup is reliable and provides strong suction, but requires a vacuum pump and airflow control system, resulting in higher costs. 4) Mechanical clamping type: The structure of a straight-bar dual-cylinder translational gripper involves fingers mounted on a straight bar with finger mounting seats. When pressurized gas enters the rod-side chambers of the single-acting dual cylinders, the two pistons move toward the center to clamp the workpiece; when no pressurized gas enters, springs push the two pistons outward to release the workpiece. To ensure synchronous movement of the two pistons, a flow divider valve is installed in the cylinder intake line. This type of end effector is used in loading and unloading assembly workstations.

DFS tool usage

1) Rip cutting method: When sawing, place the wood on a bench, step on the wood with your right foot perpendicular to the cut line, stand straight with your left foot at an angle of 60° to the cut line, keep your right hand perpendicular to your right knee, and position your body at an angle of approximately 45° to the cut line. Lean your upper body forward slightly and allow slight movement, but do not lean left or lunge right. When sawing, hold the saw with your right hand and place your left thumb against the blade for positioning. Gently pull and push the saw a few times (pull first, then push) to start the kerf, then remove your left hand from the saw edge. When the teeth have cut into the wood about 5mm, use your left hand to assist your right hand in lifting and pushing the frame saw. Lift the saw lightly, raising the sawing hand slightly; push the saw with more force, applying simultaneous effort from the wrist, elbow, shoulder, and waist in a rhythmic manner. This ensures the saw blade advances along the cut line. Otherwise, the edge of the wood after rip cutting will be bent and uneven, or the kerf surface will be inconsistent top to bottom. 2) Cross-cutting method: When sawing, place the wood on a bench, stand to the left rear of the wood, hold the wood with your left hand, hold the saw with your right hand, and step on the wood with your left foot. The sawing method is the same as for rip cutting. When using a frame saw, the lower end of the blade should tilt forward. For rip sawing, the upper end of the blade tilts backward at an angle of approximately 75°—90° (angle relative to the wood surface); for cross-cutting, the blade tilts backward at an angle of approximately 30°—45°. Always ensure the saw blade advances along the line without deviation. The kerf must be straight; avoid swaying the blade left and right, which causes skewing. When the wood is nearly sawn through, stabilize the cutoff piece with your left hand, slow down the sawing speed, and continue until the wood is completely severed. Do not leave any connection to let it break off or snap it by hand, as this can damage the saw blade and cause the wood to split along the grain, affecting quality.

DFS tool usage

1) When placing the diamond dressing tool tip into the holder, be careful not to impact the grinding wheel surface. 2) Do not align the single-point diamond dressing tool tip vertically with the center of the grinding wheel; it generally needs to be tilted at 10-15°. 3) Do not "quench" (i.e., suddenly cool) a heated dressing tool. During dry dressing, maintain sufficient interval time between dressings to allow the heated dressing tool to cool. 4) Do not assume the grinding wheel surface is ideally flat. At the start of dressing, locate the high points on the grinding wheel and perform dressing. 5) If possible, the amount removed from the grinding wheel during each dressing should not exceed 0.001 inches on the radius. Excessive removal can cause premature wear and frequent fracture of the diamond dressing tool tip. 6) However, do not remove too little material each time. Grinding wheels used on old or less rigid machine tools may not require dressing. 7) Note that the dressing tool should not remain in one position for too long. This will polish the grinding wheel surface, generate high temperatures, and damage the diamond dressing tool. Rotate the dressing tool at least once daily. 8) Do not continue to use worn or damaged dressing tools. Adjust or replace them promptly. 9) Do not select excessive removal amounts and too fast lateral feed rates during rough dressing, followed by small removal amounts and slow lateral feed rates during fine dressing. This will quickly damage the diamond dressing tool. If possible, it is recommended to use the same lateral feed rate for both rough and fine dressing.

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