SU1611610A1 - Method of grinding gear wheels - Google Patents

Abstract

The invention relates to the field of mechanical engineering, in particular to the grinding of gear products on gear and spline grinders with a single division. The purpose of the invention is to increase productivity and accuracy of processing. In the course of processing, the feedrate value T ₀ for plunging is determined, at which the removal of metal does not occur yet, i.e. the feed value corresponds to the tension value of the technological system. Then, on roughing passes, when profiles are machined with significantly different allowances, tool 2, machining profile 4 with maximum allowance, is fed to a depth of cut equal to that specified in this passage, the second tool 3 is fed to a depth of cut equal to T ₀ feed to A plunge in which metal is not yet removed, and when equality of allowances for opposite profiles x 4, 5 of the teeth being machined is reached, both tools 2, 3 are fed to the same cutting depth T set on this passage. 1 il.

Description

FIELD OF THE INVENTION The invention relates to mechanical engineering, in particular to grinding gear products on gear and spline grinding machines with a single division. ; The purpose of the invention is to increase the productivity and accuracy of processing.

The drawing shows a diagram of the existing forces and elastic deformations of the technological system, which ensures that the gear wheel is operated with two trays set on a zero-angle-processing method, where the following symbols are used:

I P - normal force component: cutting when machining a profile with

; given depth of cut;

: t is the depth of cut; I / is the stiffness of the product system in the direction of the action of a normal supply pressure;

I b - the value of the elastic deformations of the technical system;

 the rigidity of the grinding wheel; to - feed for plunging, the value of which corresponds to the value of on; ton ha of technological system;

 Ra - normal is ush, and effort, deystBuyush, it is processed

wheel at the feed-in, the value of which corresponds to the tension value of the technological system.

The processed wheel is affected by a force equal to the difference in the normal forces of the teeth acting on the opposite profiles, and the magnitude of the elastic deformations of the product system is directly proportional to: the difference in forces and inversely proportional to the | ia sum of the rigidities of the product system and the systems |

/ rad - | - / cr

Gear 1 is machined with two tools (grinding wheels)

2 and 3 with a flat production surface, which treat the opposing profiles 4 and 5 of the mating teeth. The dividing process (not shown) is carried out after removing the entire specified allowance (not shown) on the processed profiles x 4 and 5. Before the treatment begins, the allowance for the teeth of the wheel to be machined is measured, for example, by means of active control sensors that are detected. coordinates of the sides of the teeth.

The dependence of the values of elastic deformations of the technological system on the allowance is determined when processing a test product or during processing using sensors of active control on the difference in the coordinates of the side surfaces of the teeth before and after processing with a known depth of cut 1. Then, taking into account this dependence, determine the number passes when machining each pair of teeth. According to the invention further define

the to value of the tool feed 2 or 3, at which the removal of the metal does not occur when machining the mating teeth with significantly different allowances, i.e. determine the value of the supply to in accordance with the value of the tension of the technological system. The tool 2, the processing profile 4 with the maximum allowance, is fed to the cutting depth equal to that specified on this passage, the second tool

Q 3 is fed to the depth of cut to, and when equality of allowances on opposite profiles x 4 and 5 is reached, both tools 2 and 3 are fed to the same depth of cut t, given on this passage. The definition of /, and the feeding of the circles to the incision on the machine, equipped with active control sensors and an adaptive numerical program control system, is carried out automatically. In accordance with the algorithm, the system

0 on the management of grinding calipers, operates with the values of stiffness AIDS, found directly from experience in the process of automatic processing of the product. The stiffness characteristics are refined and remembered when moving from product

5 to the product in series, grinding. The practical value is related to the auto-tuning of the active control sensors. Proper control of auto-tuning is that the sensors always indicate the zero allowance at the point to. Then at

 nursing processing passes on the teeth x, for which, removal is more active, the greater the difference / -to (correction of residual errors is accelerated).

Claims (1)

Thus, as the stiffness of the process system increases, the stock removal rate increases, which leads to a reduction in the number of passes required to remove a given stock. Invention Formula 0 Method of grinding gear wheels under single split conditions with two grinding wheels with a flat production surface, covering the opposite sides of the processed tooth profiles, including measuring the allowance on each side of the profile and determining the number of rough and finishing passes when machining each pair of teeth taking into account the value of elastic deformations technological system, different Q so that, in order to increase productivity and machining accuracy, on the roughing passes, one of the grinding wheels is told to move to the contact with the profile being processed, after which the plunge feed is reported, the value of which 5 corresponds to the tension value of the technological system, then, when equality of the allowances along the processed profile of the teeth is achieved, the grinding wheels are set to the same depth of cut. five