Mineral sizers is mainly composed of gear box, frame part, fixed roller, movable roller, linkage device and so on. The toothed crushing plate is the main part of the fixed stick, and the toothed crushing plate is in direct contact with the ore, which requires the high hardness of the toothed crushing plate. Therefore, the tooth crushing plate is selected to contain chromium high manganese steel, and the water toughening treatment is carried out after casting. Because the fixed roller work is to keep rotating, the fixed roller allows a small allowable eccentricity, so the roller core must do static balance test. In order to ensure that the tooth crushing plate and spare parts can still ensure the static balance after installation, the weight difference of the tooth crushing plate shall not be greater than 1kg, so the tooth crushing plate must be processed. Due to the high hardness, the tool cutting heat is too large, if not timely heat will make the tool annealing. It affects processing, so the speed of the equipment is very low during processing. The general processing method is the gantry milling machine, the crushing plate (referred to as the tooth plate) four corners cushion, so that the tooth plate tooth tip does not contact the bed, four corners and then with four pressure plates, and then processing, because the tooth plate pressure plate processing, so after processing, the remaining surface (pressure plate compression) need to move the pressure plate, the remaining part continue to process, due to the hardness of the tooth plate, The tool speed can not be too fast, so the processing period is particularly long, and the tooth plate is the key part of the entire equipment, the loss is large, the quantity demand is large, so this ordinary processing method can not meet the needs of production. To improve the processing efficiency of the tooth plate, that is, to ensure the processing quality, but also to improve the processing efficiency has become a key point, we start from these two points, the processing method has been improved to solve this problem. This processing method mainly solves the problem of tooth plate loading, that is, it can be convenient to find the right, and can make it complete after loading the card, no need to repeat loading the card, in order to better improve the processing efficiency, combined with the existing equipment, we choose the double column milling processing, so that our processing efficiency will be greatly improved. Starting from the above two points, we design a symmetrical device, so as to ensure that the device can be used on the double column mill, the rest we solve is the problem of loading the card, that is, it can be stable, but also make it easy to find the right, so we design the loading surface into the arc of the same arc loading surface as the tooth plate, and design a hook slot below, the hook slot is used to jam the lower end of the tooth plate. The hook groove is designed strictly in accordance with the prototype of the lower end of the tooth plate, so that the tooth plate is well installed on the device, because the tooth plate is a casting, the casting may appear the phenomenon of box swell and so on, so that the arc surface of the tooth plate and the fixture arc are not shaped, the design of the mineral sizers device has a top wire for fine tuning to make the alignment more accurate, the top wire is divided into four positions, one at each end of the device. This will make the search easier. When processing, it is necessary to fix the device on the bed surface, we choose the lower part of the device with a key block, the key block is combined with the bed groove, the ear is fixed with three bolts, when fixing the tooth plate, it is necessary to use a pressure plate, in order to ensure that the pressure plate presses the two pieces of tooth plate, the two pieces of tooth plate does not expand to both sides, we design the pressure plate is both ends of the inclined plate, so that when pressing, There will be two pressing forces to the middle, so as to ensure the expansion of the tooth plate, and we use the bolts of the fixing device to fix the pressure plate, so that a number of bolts are removed, so that the use of the fetal gear is not cumbersome.
2 tooth plate processing of the design process
The base plate 14 is provided with a positioning key 2 at the bottom of the base plate 14, and a support tube 7 is arranged between the base plate 14 and the upper plate 9. The bottom of the outer surface of side panel 10 is a hook groove 13, and the two sides of side panel 10 and upper panel 9 are respectively provided with a top wire 3: the upper part of the bolt 15 in the support tube 7 is a pressure plate 4, the bolt 15 above the pressure plate 4 is provided with a positioning nut 6, and the bolt 15 between pressure plate 4 and upper panel 9 is provided with a nut 8. The bottom surface of the pressure plate 4 can be an inward inclined plane 16, so that the tooth plate 11 on both sides is inward, which is more conducive to the fixing of the tooth plate 11. The outer side of the side plate 10 is the same tooth plate 11 processing the same curved surface: so that the tooth surface is fitted to the side plate 10, easy to fit, more conducive to processing. 3 Double column milling tooth plate clamping process with double column milling the main clamping step is: first of all, the fixed fixture is installed on the double column milling machine, as far as possible, the mineral sizers key block under the bed groove, the use of bolts, then do not find the right, the key block has achieved the accuracy of the straight direction, and then the lower end of the hook surface of the tooth plate is stuck in the fixed fixture of the hook groove, the above pressure plate is pressed on, temporarily not pressed: The top wire is used for alignment, and the pressing plate is pressed after alignment, and then it can be processed. Summary of achievements: Because the processing method adopts the underside key block positioning of the fetal, the hook groove is installed with the clamping plate, the inclined plate is pressed, and the top wire is fine-tuning, this clamping method is stable, and the processing precision is high, so that the product quality is well ensured. Because the processing method is simple, the clamping is convenient in the machine tool, after loading the card once, there is no need to install the card to find the positive fetal, and it can process two workpieces at the same time. Therefore, it solves the problem that the conventional method needs to load the card repeatedly, and greatly improves the production efficiency.