CN1055037C - In-situ grinding point scraping method of fixed joint surface - Google Patents

Abstract

The present invention relates to a grinding point scraping method for a fixed binding surface in position. When a fixed binding surface reaches 5 to 7 points per sq inch by conventional scraping, the fixing binding surface is fastened. Thus, a machine tool is in an operating state under the action of a vibrator or by switching on a traction motor, the fixing binding surface can generate vibrating friction, few presented hard contacting points can be observed on each sq inch, scraping is then carried out, the hard contacting points are increased by repeating 5 to 6 times, and the number of the hard points on each sq inch can not change. The accuracy of the fixed binding surface can be improved according to a formula, and the accuracy of the present invention is higher than sliding grinding point method.

Description

In-situ grinding point scraping method of fixed joint surface

The invention relates to a method for scraping and grinding a plane. In particular, it is a scraping method for improving the contact stiffness of a fixed joint surface.

At present, in the current machine tool assembly process, the sliding point method is used before scraping both the sliding joint surface and the fixed joint surface. It can ensure the stability of the contact stiffness, but it is not suitable for the fixed contact surface. Although there are many hard points in the contact when sliding the grinding point, due to the existence of macroscopic unevenness, only a few hard points participate in the contact during the fixed contact, so that the rigidity of the machine tool Low, such as the patent 89109019.3 scraping machine scraping machine, under the drive of external power, the surface of the processed part is subjected to intermittent micro-cutting, so that the surface of the part forms convex and concave spots according to certain rules and patterns, from the microscopic On the other hand, the surface of the part is uneven and alternate, so that the surface of the part stores oil, and the thickness of the static oil film is increased, which can improve the bearing capacity of the part, but it cannot significantly prolong the life of the precision of the fixed contact surface of the machine tool and increase the rigidity.

The purpose of the present invention is to provide a scraping method for in-situ grinding points on a machine tool or other fixed joint surfaces, which can improve the rigidity of the fixed contact, stabilize the precision of the machine tool, and prolong the life of the precision.

The present invention comprises the steps:

(A) When the conventional scraping method is used to process 5-7 points per square inch, the in-situ grinding point scraping method is used to continue processing, and the fixed joint surface is fastened. Under the action of the vibration exciter, or start the drag motor to make the machine tool In the rotating state, vibration friction occurs on the fixed joint surface.

(B) Check with the coloring method, you can find a few contact hard points, then scrape the hard points, grind the points again, scrape again, and continue in this cycle. At this time, all the hard points that appeared in the grinding points will appear after assembly.

(C) Check the contact deformation. After tightening the scraped joint surface, pressurize it on the press, and measure the contact deformation to zero through 4 dial gauges.

Compared with the sliding point method, the present invention has higher rigidity, and is especially suitable for the fixed surface whose contact stiffness cannot be improved by the sliding point method.

P-接触面间平均压强、C-系数，接触点增加，C值减小，接触刚度增大固定结合面接触硬点的增加，将导至固定结合面接触刚度增加。The present invention is mainly applied to the scraping of mating surfaces that require high rigidity in machine tool manufacturing, especially when the rigidity of the mating surfaces cannot be guaranteed by the sliding grinding method, it is better to adopt this method. After routine scraping on the fixed joint surface, it can be observed with the naked eye, reaching 5-7 points per square inch, and the fixed joint surface is tightened. After vibration and friction, a small number of contact hard points appear, and then scrape repeatedly several times according to the hard points that appear, and the precision is improved, which is higher than that of the contact stiffness processed by the sliding grinding point method and the accuracy is stable. According to the formula: contact stiffness

P-the average pressure between the contact surfaces, C-coefficient, the increase of the contact point, the decrease of the C value, the increase of the contact stiffness, the increase of the contact hard point of the fixed joint surface, will lead to the increase of the contact stiffness of the fixed joint surface.

Claims (1)

1. A scraping method for in-situ grinding points on a fixed joint surface, comprising the following steps: (A) When the conventional scraping method is used to process 5-7 points per square inch, the in-situ grinding point scraping method is used to continue processing, and the fixed joint surface is fastened. Under the action of the vibration exciter, or start the drag motor to make the machine tool In the rotating state, vibration friction occurs on the fixed joint surface. (B) Check with the coloring method, you can find a few contact hard points, then scrape the hard points, grind the points again, scrape again, and continue in this cycle. At this time, all the hard points that appeared in the grinding points will appear after assembly. (C) Check the contact deformation. After tightening the scraped joint surface, pressurize it on the press, and measure the contact deformation to zero through 4 dial gauges.