CNC lathe hydraulic chuck soft jaw turning fixture
Special Mold,Foot Mold Kit,Ceramic Breathing Bag Mould,Porcelain Diving Suit Mould ZIBO HAOXIANG CERAMICS TECHNOLOGY CO.,LTD. , https://www.haoxiangceramics.com
1. Soft claw 2. T-nut 3. Claw seat 4. Chuck body 5. Support plate Figure 1 Hydraulic chuck 
1. Clip specific 2. Slide type fixing pin 3. Stopper Fig. 2 Specific structure of the clamp When processing large batches of shaft or disc parts, in order to prevent damage to the machined surface of the workpiece, ensure that the workpiece is clamped to the surface and The concentricity of the machined surface requires that the clamping surface of the soft chuck of the hydraulic chuck be turned. The conventional method of turning a soft claw with a clip-on chuck is shown in Fig. 1. A circular support plate 5 is clamped inside the soft jaw of the hydraulic chuck to support the soft jaw, and then the clamping surface of the soft jaw is turned for processing. The diameter of the grip surface of the soft jaw is approximately equal to the diameter of the workpiece in the gripped part. In order to make the center of the soft pawl's stroke the position for holding the workpiece, the soft paws with different clamping dimensions must use support plates of different diameters. Therefore, before turning the soft paws, various specifications must be prepared in advance. Support plate. Because the inner surface of the soft claw is clamped with a supporting plate, the clamping surface of the soft claw cannot be all turned, and if the processing dimension is excessive, a new supporting plate must be replaced and the soft claw be reprocessed. When the soft claw is turned, the supporting plate is clamped inside the soft claw. When the hydraulic chuck is actually operated, the workpiece is clamped outside the soft claw. Because the soft jaws are supported at different positions, the gripping surface of the soft claws will become a flare shape when the workpiece is actually clamped, thereby affecting the reliable positioning and clamping of the workpiece. In view of the above problems, we have designed and manufactured a fixture for turning soft jaws of hydraulic chucks through theoretical analysis and trial and error. The jig does not require the support plate and the collar to accurately fix the hydraulic chuck's soft jaw, thereby realizing the turning of the soft jaw of the hydraulic chuck. The structure principle and usage of the fixture are described below. As shown in FIG. 2, the jig is composed of a clamp 1, a slider-type fixing pin 2, and a stopper 3. On the ring clamp 1 with a thickness of 10-15 mm and an outer diameter smaller than the chuck diameter size, three arc-shaped grooves with different centers are dividedly arranged on the circumference of the circle. Each arc-shaped groove is provided with a groove free A sliding slider-type fixing pin 2, the stopper 3 is fixed to the slider-type fixing pin 2 by a screw. Three slider-type fixing pins will be inserted into the screw holes of the three soft jaws of the hydraulic chuck, respectively. When the hydraulic chuck is clamped, three slider-type fixing pins can be automatically adjusted to the optimal position, so that the three soft claws of the chuck are subjected to the same force. The slide-type fixing pin has a long slidable stroke in the arc-shaped groove, so the clamp can not only fix the soft-claws with different clamping dimensions, but also can save a plurality of support plates of different sizes, and can perform stepless micro adjustment. Soft paw consumption is minimized. Since there is no obstruction of the support plate, the clamping surfaces of the soft jaws can all be turned. Therefore, when the workpiece is actually clamped, the deformation of the clamping surface of the soft jaws is small and the clamping accuracy is high. 
1. Clip detail 2. Slide-type fixing pin 3. Internally-clamped soft-claw Figure 3 Turning method of inner-clamping soft-claw 
1. Clip specific 2. Slide type fixing pin 3. External clip type soft claw Figure 4 Turning method of external clip type soft claw As shown in Fig. 3, when using this kind of fixture to turn inner clip type soft claw, hydraulic pressure should be first The chuck is opened to the maximum and the position of the soft jaws on the jaws is adjusted according to the diameter dimension of the workpiece being clamped. Measure the distance from the center of the hydraulic chuck to the counterbore screw counterbore and select the fixture that matches its size. Then, the two slider-type fixing pins 2 on the clamp are respectively inserted into the screw holes of the two soft claws 3 in the lower part of the hydraulic chuck. The left hand grasps the clamp 1 and the left and right rotates, so that the remaining other slider-type fixing pin 2 is aligned with the screw-hole of the third soft claw on the upper part of the chuck, and the right hand presses the slider-type fixing pin 2 into the counterbore. Press the clamps 1 with both hands so that the clamps are in contact with each of the soft jaws. Repeatedly open and close the hydraulic chuck, rotate the clamps to the right and left sides of the hands, adjust the position of the slider-type fixing pins 2 in the arc-shaped grooves, and try to make the position of the clamps of the soft claws close to the center of the stroke of the soft claws. After the above steps are completed, the hydraulic chuck can be clamped and the turning of the clamping surface of the soft jaw can begin. As shown in FIG. 4 , this clamp can also replace the collars of different sizes to fix the outer clamp-type soft jaws and realize the turning of the external clamp-type soft jaws. The specific use method is similar to the method of using the soft clip-on claws in turning, which will not be described here. The production practice proves that this type of fixture is not only compact in structure, but also applicable in a wide range of applications. It is also low in cost, simple in operation, and easy to use. It is welcomed by operators.