CN109719308B

CN109719308B - Annular mortise machining tool setting method

Info

Publication number: CN109719308B
Application number: CN201811512383.5A
Authority: CN
Inventors: 惠畅; 张江峰; 谭家进
Original assignee: AECC Guizhou Liyang Aviation Power Co Ltd
Current assignee: AECC Guizhou Liyang Aviation Power Co Ltd
Priority date: 2018-12-11
Filing date: 2018-12-11
Publication date: 2021-05-28
Anticipated expiration: 2038-12-11
Also published as: CN109719308A

Abstract

The invention discloses a tool setting method for processing an annular mortise, wherein an excircle slot is formed in the side surface of a part to be processed, an annular mortise is longitudinally formed in the middle of the part to be processed, an exposed straight opening of the excircle slot in the side surface is selected as a first longitudinal tool setting point, the end surface of the excircle slot is taken as a first transverse tool setting point, after the excircle slot is processed, the right side or the left side of the end surface at the bottom of the annular mortise is taken as a second longitudinal tool setting point, the right side or the left side of the narrowest part of the annular mortise is taken as a second transverse tool setting point, and finally the left side or the right side of the end surface at the bottom of the annular mortise is taken as a third longitudinal tool setting point and the left side or the right side of the narrowest part of the annular mortise is taken as a third transverse tool setting. The tool setting method is suitable for annular mortise turning on various types of disk parts of aeroengine, and can meet the technical requirements on mortise machining precision, symmetry, position degree and the like.

Description

Annular mortise machining tool setting method

Technical Field

The invention relates to a mechanical processing method, in particular to a tool setting point selection method during processing of an annular mortise.

Background

In the aviation industry, along with the improvement of design ability and manufacturing ability, the integration degree of engine parts is higher and higher, and the part design tends to whole, light weight, accurate type development, and profile structure is also more and more complicated. The disc type workpiece is made of high-temperature alloy material, belongs to one of easily deformable materials, and tends to develop on complex curved surfaces such as thin walls, multi-space molded surfaces and the like in structure. The high-temperature alloy material is hard to hinge, cutter relieving exists in the machining process, the requirement on the precision of the annular mortise is high, and the qualified size is not easy to machine.

In the process of processing the annular groove, the part is easy to deform, so that the accuracy of the annular mortise cannot reach the standard, and the problem that how to reduce the deformation in the process of processing the annular mortise by turning is difficult to overcome is solved.

The shape of the annular mortise is as shown in the drawing, the narrowest dimension of the middle part is only 5+0.075mm wide, and the widest dimension of the lower part is 8.28+0.2 mm. The ring groove has a complex structure, the middle part is too narrow, and a common cutter cannot enter the ring groove, so that the processing cannot be finished by one cutter, and only the special ring groove cutter can be used for processing in steps.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: aiming at the problem that the machining size is unqualified due to material deformation during the machining of the annular mortise, a tool setting mode with multiple tool setting points is provided.

The technical scheme of the invention is as follows:

a method for processing and aligning an annular mortise comprises the following steps: the method comprises the steps of forming an excircle slot on the side surface of a part to be machined, forming an annular mortise in the longitudinal direction of the middle part of the part to be machined, selecting an exposed straight opening of the excircle slot on the side surface as a first longitudinal tool setting point, using the end surface of the excircle slot as a first transverse tool setting point, after the excircle slot is machined, using the right side or the left side of the end surface of the bottom of the annular mortise as a second longitudinal tool setting point, using the right side or the left side of the narrowest part of the annular mortise as a second transverse tool setting point, using the left side or the right side of the end surface of the bottom of the annular mortise as a third longitudinal tool setting point, and using the left side or the right side of the narrowest part of the annular mortise as a third transverse tool.

The tool point of the tool used in the first tool setting is vertical.

The tool points used in the second and third tool setting are extended from the side surfaces, and the directions of the tool points used in the two processing are opposite.

The invention has the beneficial effects that:

normal car processing only adopts a tool setting point tool setting, does not consider the part deformation in the processing to the influence of processing that comes next, and this patent has avoided the part to become the influence of phase pair processing that comes next through the selection of different tool setting points, has guaranteed the precision of size.

The tool setting method is suitable for annular mortise turning on various types of disc parts of aeroengine, can ensure the technical requirements of mortise machining precision, symmetry, position degree and the like, solves the problem that the precision of the annular mortise cannot be ensured in the turning process, reduces the influence of deformation on the machining of two sides of the annular mortise, and is successfully applied to annular disc parts.

Description of the drawings:

FIG. 1 is a schematic view of the position of a first pair of tool points.

Fig. 2 is a schematic structural view of a straight cutter.

Fig. 3 is a schematic diagram of initial grooving using a straight cutter.

Fig. 4 is a schematic diagram of the positions of the second pair of tool points.

Fig. 5 is a schematic structural diagram of a turning tool on the right side of the ring groove.

Fig. 6 is a schematic position diagram of the third pair of tool points.

Fig. 7 is a schematic structural diagram of a turning tool for the left side of the ring groove.

FIG. 8 is an overall schematic view of three tool set points on a part.

The specific implementation mode is as follows:

example (b): in this embodiment, the longitudinal direction is the X direction, the transverse direction is the Z direction, and the tool setting is performed by a tool edge, that is, Z is 0.

Knife setting points of a first straight knife (knife No. T0707): the X-direction is towards the tool setting point, and figure 1 shows a straight excircle. Z-direction tool setting points: the end face for the datum position of the part is shown in figure 1. Fig. 2 is a schematic view of a tool. First selection of tool set point: as shown in FIG. 1, because the slotting cutter is an initial slot (i.e. ordinary outer slot)

The reason is as follows:

the normal initial slotting precision can be ensured by the end face tool setting precision. Therefore, the exposed straight opening of the pair of tool setting points is selected as an X-direction tool setting point, and the end surface as shown in the figure is used as a Z-direction tool setting point. (FIG. 1)

Tool setting points of a turning tool on the right side of the ring groove (T1010 tool setting points):

firstly, a T0707 cutter is adopted for primary grooving (figure 3) and then a T1010 cutter is adopted.

The X-direction tool setting position of T1010 (fig. 4) is negligible deformation from the position of the ring groove because the position can be directly measured by a vernier caliper.

Z-direction tool setting position of T1010: as shown in the figure, the tool nose is attached to the right of the straight groove, and the right of the straight groove is set to be a zero point in the Z direction. (FIG. 4)

Because the right side of the straight groove is formed by the previous processing step (figure 3), the deformation of the right side of the straight groove and the ring groove can be ignored.

The reason is as follows: in the thin-wall part of the part, the straight opening and the ring groove graphic X position have deformation inconsistency, and the deformation amount at the outer straight opening is approximately within 0.20. Therefore, the tool setting point is directly on the inner plane of the ring groove (namely the X position shown in the figure), and the deformation of the outer straight opening and the inner diameter of the ring groove is avoided. And directly selecting the end surface of the initial slot as a tool setting point in the Z direction.

③ the tool setting point of the left turning tool of the ring groove (T0909 tool setting point):

firstly, after the initial grooving of the T0707 cutter is adopted (figure 3), the T0909 cutter is subjected to the grooving, and the cutter structure of the T0909 is shown in figure 7

The pocket knife to knife position is the position X shown in fig. 6. Because the position can be directly measured by a vernier caliper, the position is the bottom position of the ring groove, and the deformation amount of the position of the ring groove can be ignored.

Z-direction tool setting position of T0909: as shown in the figure, the tool nose is attached to the left side of the straight groove, and the left side of the straight groove is set to be a zero point in the Z direction.

Because the left side of the straight groove is machined in the previous step (figure 3), the deformation of the left side of the straight groove and the ring groove can be ignored.

Claims

1. The utility model provides a tool setting method is processed to annular tongue-and-groove which characterized in that: the method comprises the following steps that an excircle slot is formed in the side face of a part to be machined, an annular mortise is longitudinally formed in the middle of the part to be machined, firstly, an exposed straight opening of the excircle slot in the side face is selected as a first longitudinal tool setting point, the end face of the excircle slot is used as a first transverse tool setting point, the tool tip used for first tool setting is vertical, after the excircle slot is machined by using the tool and the annular mortise is initially opened, the right side of the end face at the bottom of the annular mortise is used as a second longitudinal tool setting point, the right side face at the narrowest position of the annular mortise is used as a second transverse tool setting point, and the tool tip used for second tool setting extends out of the right side face; and finally, taking the left side of the end surface of the bottom of the annular mortise as a third longitudinal tool setting point, taking the left side surface of the narrowest part of the annular mortise as a third transverse tool setting point, and extending the tool tip of the tool used in the third tool setting process from the left side surface.