阅读说明：本技术 一种对护环上浅槽的加工方法及圆头车刀 (Method for machining shallow groove on retaining ring and round-head lathe tool ) 是由 朱建亚 王玉泉 张洪 钟磊 陶建民 欧阳克良 孙少鹏 于 2021-01-25 设计创作，主要内容包括：本发明公开了一种对护环上浅槽的加工方法及圆头车刀。步骤包括如下：步骤一：护环固定在车床的旋转轴上,圆头车刀固定在刀具上,圆头车刀对准待加工浅槽的靠外侧端；步骤二：护环以轴向的中心线以33～45r/min转速旋转；圆头车刀的圆头向浅槽轴向靠近,靠近的背吃刀量为0.1mm～0.2mm；圆头车刀上的0.4mm单边间隙对浅槽进行切削加工,沿护环径向以0.1mm/min～0.12mm/min进给的速度进给；护环上的浅槽加工成型,浅槽表面的粗糙度为Ra1.6～Ra3.2,满足浅槽表面的粗糙度达到Ra3.2的要求；解决了现有使用非标刀具按照浅槽的形状进行仿形走刀浅槽表面会存在波纹的问题,避免了需要使用纱布对浅槽表面二次打磨加工,提高了加工效率；步骤三：圆头车刀沿轴向远离浅槽方向上升,而后从浅槽上方退出。(The invention discloses a method for processing a shallow groove on a retaining ring and a round-head turning tool. The method comprises the following steps: the method comprises the following steps: the retaining ring is fixed on a rotating shaft of the lathe, the round-head turning tool is fixed on the cutter, and the round-head turning tool is aligned to the end, close to the outer side, of the shallow groove to be machined; step two: the protective ring rotates at the rotation speed of 33-45 r/min along the axial center line; the round head of the round head turning tool is axially close to the shallow groove, and the back bite of the close round head turning tool is 0.1-0.2 mm; cutting the shallow slot by 0.4mm unilateral clearance on the round-head lathe tool, and feeding at the feeding speed of 0.1 mm/min-0.12 mm/min along the radial direction of the retaining ring; the shallow groove on the retaining ring is processed and formed, the surface roughness of the shallow groove is Ra1.6-Ra3.2, and the requirement that the surface roughness of the shallow groove reaches Ra3.2 is met; the problem that the surface of the profiling feed shallow groove is corrugated by using a non-standard cutter according to the shape of the shallow groove in the prior art is solved, the secondary grinding processing of the surface of the shallow groove by using gauze is avoided, and the processing efficiency is improved; step three: the round-head lathe tool ascends along the direction of being far away from the shallow groove along the axial direction and then retreats from the upper part of the shallow groove.)

1. A method for processing a shallow groove on a retaining ring is characterized by comprising the following steps:

the method comprises the following steps: the retaining ring (1) is fixed on a rotating shaft of a lathe, the round-head turning tool (3) is fixed on a cutter, and the round-head turning tool (3) is aligned to the end, close to the outer side, of the shallow groove to be machined;

step two: the protective ring (1) rotates at the rotation speed of 33-45 r/min along the axial center line; the round head of the round head turning tool (3) is axially close to the shallow groove, and the back bite of the close round head turning tool is 0.1-0.2 mm; cutting the shallow slot by a 0.4mm unilateral clearance on the round-head lathe tool (3), and feeding at a feeding speed of 0.1-0.12 mm/min along the radial direction of the retaining ring (1);

step three: the round-head turning tool (3) ascends along the direction of being far away from the shallow groove (11) in the axial direction and then retreats from the upper part of the shallow groove (11).

2. The method for machining the shallow groove on the retaining ring according to claim 1, wherein: and in the second step, the mode of cutting and removing the tool scraps is extrusion type chip breaking.

3. A round head tool according to any of claims 1 to 2, comprising: the turning tool clamping section and the turning tool head section are fixedly connected with each other, the turning tool head section is a round head, the single edge of each of two ends of the turning tool head section is wider than the middle part by 0.4mm, and a 0.4mm gap exists on the single edge when the shallow slot (11) is processed in a contact mode with the retaining ring (1), so that the shallow slot (11) can be cut.

4. The round nose tool of claim 3, wherein: and the radius R of two ends of the turning tool head section is 3 mm.

5. The round nose tool of claim 3, wherein: the round-head turning tool (3) adopts a hard alloy tool with a coating.

6. The round nose tool of claim 3, wherein: the lathe tool clamping section and the lathe tool head section are fixedly connected into a whole.

Technical Field

The invention relates to a method for machining a shallow groove in a retaining ring, and belongs to the technical field of part machining.

Background

In order to meet some requirements, a shallow groove needs to be machined on a part retaining ring of an aeroengine, as shown in fig. 1, because the shallow groove is poor in openness, meanwhile, the axial sunken depth of the shallow groove is 0.3mm, and the height of the shallow groove above the axial direction is only 4.7mm, a common cutter cannot enter due to poor openness, in the prior art, when the shallow groove is machined, a non-standard cutter needs to be manufactured to perform profiling feed according to the shape of the shallow groove, after the shallow groove is machined by the non-standard cutter through the profiling feed, the surface of the shallow groove can have ripples, so that the roughness of the surface of the shallow groove hardly meets the requirement of ra3.2, and the surface of the shallow groove needs to be subjected to secondary grinding by using gauze, so that the.

Disclosure of Invention

In order to solve the technical problem, the invention provides a method for processing a shallow groove on a retaining ring.

The invention also provides a round-head turning tool for processing the shallow groove on the retaining ring.

The invention is realized by the following technical scheme.

The invention provides a method for processing a shallow groove on a retaining ring. The method comprises the following steps:

the method comprises the following steps: the retaining ring is fixed on a rotating shaft of the lathe, the round-head turning tool is fixed on the cutter, and the round-head turning tool is aligned to the end, close to the outer side, of the shallow groove to be machined;

step two: the protective ring rotates at the rotation speed of 33-45 r/min along the axial center line; the round head of the round head turning tool is axially close to the shallow groove, and the back bite of the close round head turning tool is 0.1-0.2 mm; cutting the shallow slot by 0.4mm unilateral clearance on the round-head lathe tool, and feeding at the feeding speed of 0.1 mm/min-0.12 mm/min along the radial direction of the retaining ring; forming shallow grooves on the retaining ring;

step three: the round-head lathe tool ascends along the direction of being far away from the shallow groove along the axial direction and then retreats from the upper part of the shallow groove.

The cutting tool bits are extruded broken bits

A kind of round head lathe tool to the shallow slot processing on the retaining ring, including: the turning tool clamping section and the turning tool head section are fixedly connected with each other, the turning tool head section is a round head, the single edge of each of two ends of the turning tool head section is wider than the middle part by 0.4mm, and a 0.4mm gap exists on the single edge when the shallow groove is machined by contacting with the retaining ring, so that the shallow groove can be machined by cutting.

Radius R of two ends of the turning tool head section is 3mm, so that the turning tool head section can conveniently enter and exit from the upper space of the shallow groove and dissipate heat.

The round-head turning tool adopts a hard alloy cutter with a coating.

The lathe tool clamping section and the lathe tool head section are fixedly connected into a whole.

The invention has the beneficial effects that: cutting the shallow slot by 0.4mm unilateral clearance on the round-head lathe tool, and feeding at the feeding speed of 0.1 mm/min-0.12 mm/min along the radial direction of the retaining ring; the shallow groove on the retaining ring is processed and formed, the surface roughness of the shallow groove is Ra1.6-Ra3.2, and the requirement that the surface roughness of the shallow groove reaches Ra3.2 is met; the problem of current use nonstandard cutter carry out profile modeling feed shallow slot surface according to the shape of shallow slot and can have the ripple is solved, avoided using the gauze to the processing of polishing of shallow slot surface secondary, improved machining efficiency.

Drawings

FIG. 1 is a schematic diagram of a path for machining a retaining ring by using the round-head lathe tool of the invention;

FIG. 2 is a schematic left side view of the round nose tool based on FIG. 1;

in the figure: 1-a retaining ring; 11-shallow grooves; 3-round head lathe tool.

Detailed Description

The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.

As shown in fig. 1.

The invention relates to a method for processing a shallow groove on a retaining ring. The method comprises the following steps:

the method comprises the following steps: the retaining ring 1 is fixed on a rotating shaft of a lathe, the round-head turning tool 3 is fixed on a cutter, and the round-head turning tool 3 is aligned to the end, close to the outer side, of the shallow groove to be machined;

step two: the guard ring 1 rotates at a rotating speed of 33-45 r/min along an axial center line, the rotating speed is too high, the abrasion of a cutter is high, local thermal hardening is easily formed on the surface of the cutter, the quality of a machined surface is affected, the rotating speed is low, and the production efficiency is reduced; the round head of the round-head turning tool 3 is axially close to the shallow groove, the back draft of the close round-head turning tool is 0.1-0.2 mm, the side face of the ball-head blade is manually ground by using a polishing grinding wheel, the rigidity of the blade is poor, and the draft is selected to avoid damage of the tool during cutting; the shallow slot is cut by 0.4mm unilateral clearance on the round-head lathe tool 3, and is fed at the feeding speed of 0.1 mm/min-0.12 mm/min along the radial direction of the retaining ring 1, so that the working allowance of the working procedure is small, the working procedure belongs to finish machining, and high surface quality is obtained by slow feeding; the shallow groove 11 on the retaining ring 1 is processed and formed, the surface roughness of the shallow groove is Ra1.6-Ra3.2, and the requirement that the surface roughness of the shallow groove reaches Ra3.2 is met; the problem that the surface of the profiling feed shallow groove is corrugated by using a non-standard cutter according to the shape of the shallow groove in the prior art is solved, the secondary grinding processing of the surface of the shallow groove by using gauze is avoided, and the processing efficiency is improved;

step three: the round nose tool 3 rises axially away from the shallow groove 11 and then exits from above the shallow groove 11.

The cutting chip removing device is characterized in that the cutting chip removing device is an extrusion type chip removing device, and the extrusion type chip removing device aims to prevent scrap iron from scratching a processed surface in the processing process through timely chip breaking.

As shown in fig. 2.

The round-head lathe tool for processing the shallow slot on the retaining ring used in the processing method of the shallow slot on the retaining ring comprises: the turning tool clamping section and the turning tool head section are fixedly connected with each other, the turning tool head section is a round head, the single edge of each of two ends of the turning tool head section is wider than the middle part by 0.4mm, and a 0.4mm gap exists on the single edge when the shallow groove 11 is processed by being in contact with the retaining ring 1, so that the shallow groove 11 can be cut.

Radius R of two ends of the turning tool head section is 3mm, so that the turning tool head section can conveniently enter and exit and dissipate heat from the upper space of the shallow groove 11.

The round-head turning tool 3 adopts a hard alloy cutter with a coating, the hard alloy cutter can be titanium alloy, the titanium alloy has poor heat conductivity, and the coating cutter is used for prolonging the service life of the cutter.

The lathe tool clamping section and the lathe tool head section are fixedly connected into a whole.

Example 1

The invention relates to a method for processing a shallow groove on a retaining ring. The method comprises the following steps:

the method comprises the following steps: the retaining ring 1 is fixed on a rotating shaft of a lathe, the round-head turning tool 3 is fixed on a cutter, and the round-head turning tool 3 is aligned to the end, close to the outer side, of the shallow groove to be machined;

step two: the guard ring 1 rotates at the rotating speed of 33r/min along the axial center line, the rotating speed is too high, the abrasion of a cutter is fast, local thermal hardening is easily formed on the surface of the cutter, the quality of a machined surface is influenced, the rotating speed is low, and the production efficiency is reduced; the round head of the round-head turning tool 3 is close to the shallow groove axially, the back draft of the close round-head turning tool is 0.2mm, the side face of the ball-head blade is ground by a polishing grinding wheel manually, the rigidity of the blade is poor, and the draft is selected to avoid damage of the cutter during cutting; the shallow slot is cut by 0.4mm unilateral clearance on the round-head lathe tool 3, and is fed at the feeding speed of 0.12mm/min along the radial direction of the retaining ring 1, so that the working allowance of the working procedure is small, the shallow slot belongs to finish machining, and high surface quality is obtained by slow feeding; the shallow groove 11 on the retaining ring 1 is processed and formed, the surface roughness of the shallow groove is Ra1.6-Ra3.2, and the requirement that the surface roughness of the shallow groove reaches Ra3.2 is met; the problem that the surface of the profiling feed shallow groove is corrugated by using a non-standard cutter according to the shape of the shallow groove in the prior art is solved, the secondary grinding processing of the surface of the shallow groove by using gauze is avoided, and the processing efficiency is improved;

step three: the round nose tool 3 rises axially away from the shallow groove 11 and then exits from above the shallow groove 11.

Example 2

The invention relates to a method for processing a shallow groove on a retaining ring. The method comprises the following steps:

the method comprises the following steps: the retaining ring 1 is fixed on a rotating shaft of a lathe, the round-head turning tool 3 is fixed on a cutter, and the round-head turning tool 3 is aligned to the end, close to the outer side, of the shallow groove to be machined;

step two: the guard ring 1 rotates at the rotating speed of 32r/min along the axial center line, the rotating speed is too high, the abrasion of a cutter is fast, local thermal hardening is easily formed on the surface of the cutter, the quality of a machined surface is influenced, the rotating speed is low, and the production efficiency is reduced; the round head of the round head turning tool 3 is close to the shallow groove axially, the back draft of the close round head turning tool is 0.16mm, the side face of the ball head blade is ground by a polishing grinding wheel manually, the rigidity of the blade is poor, and the draft is selected to avoid damage of the cutter during cutting; the shallow slot is cut by 0.4mm unilateral clearance on the round-head lathe tool 3, and is fed at the feeding speed of 0.11mm/min along the radial direction of the retaining ring 1, so that the working allowance of the working procedure is small, the shallow slot belongs to finish machining, and high surface quality is obtained by slow feeding; the shallow groove 11 on the retaining ring 1 is processed and formed, the surface roughness of the shallow groove is Ra1.6-Ra3.2, and the requirement that the surface roughness of the shallow groove reaches Ra3.2 is met; the problem that the surface of the profiling feed shallow groove is corrugated by using a non-standard cutter according to the shape of the shallow groove in the prior art is solved, the secondary grinding processing of the surface of the shallow groove by using gauze is avoided, and the processing efficiency is improved;

step three: the round nose tool 3 rises axially away from the shallow groove 11 and then exits from above the shallow groove 11.

Example 3

The invention relates to a method for processing a shallow groove on a retaining ring. The method comprises the following steps:

the method comprises the following steps: the retaining ring 1 is fixed on a rotating shaft of a lathe, the round-head turning tool 3 is fixed on a cutter, and the round-head turning tool 3 is aligned to the end, close to the outer side, of the shallow groove to be machined;

step two: the guard ring 1 rotates at a rotating speed of 45r/min along an axial center line, the rotating speed is too high, the abrasion of a cutter is high, local thermal hardening is easily formed on the surface of the cutter, the quality of a machined surface is influenced, the rotating speed is low, and the production efficiency is reduced; the round head of the round-head turning tool 3 is close to the shallow groove axially, the back draft of the close round-head turning tool is 0.1mm, the side face of the ball-head blade is ground by a polishing grinding wheel manually, the rigidity of the blade is poor, and the draft is selected to avoid damage of the cutter during cutting; the shallow slot is cut by 0.4mm unilateral clearance on the round-head lathe tool 3, and is fed at the feeding speed of 0.1mm/min along the radial direction of the retaining ring 1, so that the working allowance of the working procedure is small, the shallow slot belongs to finish machining, and high surface quality is obtained by slow feeding; the shallow groove 11 on the retaining ring 1 is processed and formed, the surface roughness of the shallow groove is Ra1.6-Ra3.2, and the requirement that the surface roughness of the shallow groove reaches Ra3.2 is met; the problem that the surface of the profiling feed shallow groove is corrugated by using a non-standard cutter according to the shape of the shallow groove in the prior art is solved, the secondary grinding processing of the surface of the shallow groove by using gauze is avoided, and the processing efficiency is improved;

step three: the round nose tool 3 rises axially away from the shallow groove 11 and then exits from above the shallow groove 11.