The inner groove of the hole is machined on the special combined machine tool. The special combination machine tool introduced by our factory also adopts the comb cutter which cuts the inner groove. The movement of the comb-cut inner groove cutter is provided by the radial rotation and axial movement of the drive shaft. The compound motion, when rotating, the drive shaft drives the knife sleeve through the driving pin mounted on the transmission shaft, and drives the comb knife to rotate. The axial movement is transmitted by the axial feed of the drive shaft. When the positioning sleeve contacts the valve body, the outer sleeve is driven by the positioning sleeve, the bearing, and the push pin mounted on the waist groove of the transmission shaft to pull the comb knife. Retreating, by the angle of the guide pin on the comb knife and the angle of 20° of the shaft line, the axial retraction of the comb knife is changed to the oblique feed of the comb knife to complete the processing of the comb cutter groove. . The depth of the groove is controlled by a scaled adjustment nut mounted on the drive shaft.
When the one side cutting groove is completed, the drive shaft stops rotating and starts to retreat. At this time, the return spring forces the push-pull pin to be reset on the waist groove through the spring seat mounted on the push-pull pin, so that the comb-shaped knife returns to the original position and then the knife sleeve Wait for the valve hole to be pushed out together. After the valve body is adjusted, the other side groove is cut in the same way. The function of the leaf spring on the comb knife is to press the comb knife during feeding to prevent the vibration of the comb knife which occurs unevenly in the cutting allowance, and to help the comb knife retract into the knife sleeve when exiting. This tool uses a widened inner bearing ring for guiding. In addition, the outer circumference of the sleeve and the valve hole are gap-fitted to resist the reaction force during cutting, so that the cutter is stable during cutting. In addition, the actual feed direction of the comb cutter is oblique feed, which is different from the general radial and axial feed method, so the cutter is very useful for processing the inner groove of the small hole. We believe that the comb-shaped knives use a leaf spring with a guiding groove structure, and can also be designed as a structure with two guiding grooves on the comb-shaped knives, so that the structure can be compact, and the comb-shaped knives can be forced to return safely when exiting. In the knife sleeve.
The inner groove of the hole is machined in the special tooling for the machining of the inner groove of the larger valve hole, and we have made many improvements. The clamp can be machined on a special machine with a power head that only has a slide. The working principle of the cutter is: when the power head drives the cutter row to rotate, since the outer ring of the cutter row cooperates with the inner hole of the centripetal ball bearing, the inner hole of the cutter row is matched with the outer circle of the drive shaft. The outer circle at one end of the drive shaft is also in clearance with the fixed nut sleeve, so the hand wheel does not rotate when the cutter row rotates. Due to the axial limiting action of the limiting retaining ring in the groove of the cutter row and the rotation preventing action of the anti-rotation bar preventing the fixing nut, when the hand wheel is rotated counterclockwise, the hand wheel screw is driven to drive the one-way thrust bearing. And the shaft end screw and the transmission shaft fixed on the shaft end screw are simultaneously retracted, thereby pulling the pushing rod through the transmission shaft and causing the flat key of the pushing rod to be at an angle with the shaft line to drive the cutting blade to move outward, completing The function of cutting the inner slot. After the slotting is completed, the power head stops and the hand wheel is turned clockwise, so that the cutting blade is returned to the original position. The position of the advance and retraction is determined by the position of the ends of the waist groove. Therefore, the consistency of the cutting depth can be ensured. The positioning tabs on both sides of the clamp support are designed to prevent axial displacement of the entire cutter row, thereby ensuring the axial dimension of the groove. The force of the arbor is in the form of a simple support beam. Due to the large diameter of the valve, the rigidity of the shank is still good.
(Finish)
Properties of sodium formate: white granular or crystalline powder. Slightly smell of Formic Acid. Hygroscopic. Decomposes into sodium oxalate and hydrogen at high temperature, and then generates sodium carbonate. Dissolved in about 1.3 parts of water. Soluble in glycerol, slightly soluble in ethanol, its aqueous solution is neutral, pH is 7.
Sodium Formate,Sodium Formate Formula,Sodium Formate Structure,Formula Of Sodium Formate
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