Method of Machining Plum Blossom Holes in Multi-Roller Mills at Normal Temperature

Abstract

The invention discloses a method for processing plum-blossom holes in a multi-roll mill archway at normal temperature, which includes step 1, using a three-coordinate detector to check whether the processing accuracy of the template is qualified; step 2, fixing the semi-finishing archway on a workbench Step 3: After finishing the upper half of the archway and the first plum blossom hole allowance, fasten the formwork with the archway; step 3, half-finish each first plum blossom hole on the archway to a unilateral allowance of 0.09‑0.11mm Step 4, carry out trial cutting on the trial cutting block fixed on the workbench; Step 5, determine the center of the second plum blossom hole on the template corresponding to the first plum blossom hole on the selected archway, and then use the template The center of the second torx hole on the archway is used as the reference to carry out trial cutting of the first torx hole selected on the archway; step 6, fine-boring the first torx hole that has passed the trial cutting to the finished product; step 7, all the remaining first torx holes Hole fine boring to finished product. The invention has the advantages of simple processing method, convenient measurement, low requirement on the precision of the machine tool and high processing precision.

Description

technical field [0001] The invention relates to the technical field of strip-roller archway processing, in particular to a method for processing multi-roller archway plum blossom holes at normal temperature. Background technique [0002] The 20-high rolling mill is generally used in cold rolling to roll high-hardness materials such as silicon steel, stainless steel and other materials such as thin plates, extremely thin plates and strips. The structure of the rolling mill archway is an integral structure, and the rolling force of the rolling mill passes from the working roll to the middle roll. It is transmitted to the supporting roller device, and the rolling pressure on each supporting roller device is dispersed and transmitted, and then transmitted to the solid overall arch at the position of the 8 quincunx-shaped through holes, and absorbed by the overall arch. This design ensures that the work rolls are supported along their entire length. The deformation of the roll s...

AI Technical Summary

Problems solved by technology

This method firstly requires extremely high precision of each axis of the machine tool, and secondly, the holes on the tooling reference plate are manually measured by the inspector after the machining is completed. Due to the limitation of the ambient temperature and the inspector's hand feeling, it is easy to cause errors out of tolerance

The operating requirements for the operator are very high, and the mutual dimensions of each hole are strictly required during processing. As long as one hole is processed out of tolerance, the entire part will be scrapped, and multiple (for example, eight) holes cannot be measured at the same time during the processing Mutual dimensions, there is no benchmark for operation and I don’t know how to operate

[0015] Third, the tooling tool adjustment plate is installed on the archway and is an integral structure, and there is no adjustment space. It means that only one trial cutting can be performed during boring. If the blade is replaced during processing, the trial cutting cannot be performed again, and subsequent processing is relatively trouble

[0016] Fourth, this processing method relies on the tooling front plate, tooling reference plate and tooling tool adjustment plate (reference parts). Since multiple reference parts have their own errors, the superposition of multiple reference part errors leads to a decrease in machining accuracy

[0017] Fifth, when this processing method shifts coordinates, it is necessary to try to cut a small semi-circular arc on the front plate of the tooling, and in this method, the center of the workpiece is used as the reference. Therefore, once the front plate of the tooling is separated from the workpiece , it can no longer be used. The result is: each time a workpiece is processed, a tooling front plate must be used

[0019] Since the templates are installed on the front and back of the blank, and the boring tool is reciprocated on the extension shaft for boring, the reference hole on the template must be larger than the hole on the archway, even if the mutual dimensions of each hole can be guaranteed to be consistent with the drawing, but using Install the sliding sleeve to ensure the movement of the extension shaft. The difficulty of this method is how to ensure the coaxiality of the relevant holes of the front and rear templates. Secondly, when the sliding sleeve matches the holes on the template, there will be accumulated errors. The third is the extension. A boring tool should be installed on the shaft, so that the diameter of the extension shaft must be smaller than the size of the plum blossom hole on the archway, and the length of the extension shaft is generally twice the length of the plum blossom hole on the archway. The deflection deformation caused by the extension shaft itself is unavoidable

Moreover, the manufacturing cost of double templates, sliding sleeves, extension shafts and other tooling is high, the assembly is difficult, and the operation is difficult

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