In shaft parts, there are a large number of shafts with holes in the middle to be machined. The most common machining method for shaft holes is to clamp the drill bit on the lathe tailstock, hand drill the hole, and then install the boring tool on the tool holder for rutting. This method is very convenient for shallow oil hole processing and the machining accuracy is guaranteed. But for those deeper shaft holes, it is very difficult to machine. On the one hand, when the hand tailstock is drilled, the tailstock sleeve stroke is very short. When the hand feed reaches the sleeve stroke limit, it must be shaken back, the whole tailstock is pushed forward, and then manually processed. Repeatedly, the labor intensity is extremely high and the efficiency is very low. On the other hand, when finishing is required after drilling, the boring bar is very thin due to the size of the tool holder. If the hole is deep, the rigidity of the boring tool is very poor, the machining accuracy is very poor, or even impossible. machining.
The deep hole is machined on the lathe. The solution to the problem of insufficient rigidity of the arbor is that a special shank is inserted into the tailstock hole and the tailstock is boring. The machining process is the same as the drilling, and it needs to be repeated. In this way, the labor intensity is still very large, and more importantly, due to the need for repeated intermittent feeding, and the hand feed speed is not uniform, the machining accuracy and surface roughness are poor, and the quality is not achieved. Claim.
Therefore, for a small factory in general, the best solution for machining shaft-type deep holes is to modify the lathe slightly so that the tailstock can be automatically fed.
In order to enable the automatic feeding of the lathe tailstock, a variety of improvement schemes can be designed. The simplest method is to rigidly connect the tailstock to the large pallet, so that when the large pallet is longitudinally connected, At the time of feeding, the tailstock advances to achieve the maneuvering feed of the tailstock.
With this method, the following problem should be noted: In normal times, when the tailstock locking handle is in the relaxed position, there is a gap between the locking clamp below the tailstock and the lathe rail. When the handle is in the locked position, the clamp is pressed against the guide rail and the friction is large. Therefore, the adjusting nut on the pressing block must be adjusted so that when the tailstock locking handle is in the locking position, there is no gap between the pressing block and the guide rail, and there is no locking force.
By using this method, the deep hole of the lathe maneuvering feed can be realized, which not only improves the processing quality and productivity, but also greatly reduces the labor intensity of the worker. Moreover, the machine itself has hardly changed anything, no need to improve the cost, and does not damage any original parts of the lathe. To restore the original turning function of the machine tool, simply remove the connecting plate and adjust the adjusting nut of the pressing block under the tailstock to return to the original position, which is very convenient.
The deep hole is machined on the lathe. The solution to the problem of insufficient rigidity of the arbor is that a special shank is inserted into the tailstock hole and the tailstock is boring. The machining process is the same as the drilling, and it needs to be repeated. In this way, the labor intensity is still very large, and more importantly, due to the need for repeated intermittent feeding, and the hand feed speed is not uniform, the machining accuracy and surface roughness are poor, and the quality is not achieved. Claim.
Therefore, for a small factory in general, the best solution for machining shaft-type deep holes is to modify the lathe slightly so that the tailstock can be automatically fed.
In order to enable the automatic feeding of the lathe tailstock, a variety of improvement schemes can be designed. The simplest method is to rigidly connect the tailstock to the large pallet, so that when the large pallet is longitudinally connected, At the time of feeding, the tailstock advances to achieve the maneuvering feed of the tailstock.
With this method, the following problem should be noted: In normal times, when the tailstock locking handle is in the relaxed position, there is a gap between the locking clamp below the tailstock and the lathe rail. When the handle is in the locked position, the clamp is pressed against the guide rail and the friction is large. Therefore, the adjusting nut on the pressing block must be adjusted so that when the tailstock locking handle is in the locking position, there is no gap between the pressing block and the guide rail, and there is no locking force.
By using this method, the deep hole of the lathe maneuvering feed can be realized, which not only improves the processing quality and productivity, but also greatly reduces the labor intensity of the worker. Moreover, the machine itself has hardly changed anything, no need to improve the cost, and does not damage any original parts of the lathe. To restore the original turning function of the machine tool, simply remove the connecting plate and adjust the adjusting nut of the pressing block under the tailstock to return to the original position, which is very convenient.
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