CN114131289A - Ring groove processing method of high-temperature alloy casing - Google Patents
Ring groove processing method of high-temperature alloy casing Download PDFInfo
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- CN114131289A CN114131289A CN202111488312.8A CN202111488312A CN114131289A CN 114131289 A CN114131289 A CN 114131289A CN 202111488312 A CN202111488312 A CN 202111488312A CN 114131289 A CN114131289 A CN 114131289A
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Abstract
The invention discloses a method for processing a ring groove of a high-temperature alloy casing, wherein the ring groove is of a fan-shaped structure and comprises the following steps: rough machining, namely determining a machining area on the high-temperature alloy casing according to design requirements, and vertically drilling the machining area by adopting drilling to remove most machining allowance; performing primary semi-finishing, namely milling the drilled area by using an end mill until 2mm of machining allowance is reserved at the bottom of the annular groove and 0.2mm of machining allowance is reserved at one side of the groove wall; performing secondary semi-finishing, namely extending the ball-end milling cutter into the annular groove for milling until the bottom of the annular groove is milled; and (5) finish machining, namely finish machining is carried out on the ring groove by adopting a ball-end milling cutter to obtain the ring groove. According to the method for processing the ring groove of the high-temperature alloy casing, different cutters are adopted according to different processing modes, different parts of the ring groove are processed in a targeted mode, so that a novel method for processing the ring groove is realized, the processing efficiency of the ring groove is improved, and the obtained ring groove meets the requirements on size and precision.
Description
Technical Field
The invention relates to the field of high-temperature alloy casings, in particular to a method for machining a ring groove of a high-temperature alloy casing.
Background
The turbine bearing seat is made of nickel-based cast superalloy K4169, and the material has the advantages of high-temperature strength, good heat resistance, strong corrosion resistance and the like. However, the cutting performance is extremely poor due to the characteristics such as poor heat capacity and many hard spots. The high-temperature alloy casing is complex in appearance structure, three deep grooves are distributed on the periphery, two ring grooves are formed around the outer circle of the high-temperature alloy casing, the widths of the two ring grooves are 6, the depths of the two ring grooves are 16, one of the grooves envelops a circumference of which the ring angle is 170 degrees, and the other groove envelops a circumference of which the ring angle is 24 degrees. The third groove is a straight groove, is parallel to the axial direction of the high-temperature alloy casing, and has a groove width of 4 and a groove depth of 21. The three grooves are narrow and deep, and two ends of the three grooves are closed, so that even if the three grooves are annular, turning can not be adopted, and four-axis linkage milling processing can only be carried out on the revolving body on a multi-axis numerical control machine tool. The machining efficiency is very low, the machining time of the first 1 superalloy casings on the large-scale Coucher KMC800U of the five-axis numerical control machine tool exceeds 36 hours, the numerical control tool 7 is consumed, and the tool cost exceeds the standard.
Disclosure of Invention
The invention provides a method for processing a ring groove of a high-temperature alloy casing, which aims to solve the technical problems of large abrasion and long processing time of a processing cutter of the conventional high-temperature alloy casing.
The technical scheme adopted by the invention is as follows:
a method for processing a ring groove of a high-temperature alloy casing, wherein the ring groove is of a fan-shaped structure, and the method comprises the following steps:
rough machining, namely determining a machining area on the high-temperature alloy casing according to design requirements, and vertically drilling the machining area by adopting drilling to remove most machining allowance;
performing primary semi-finishing, namely milling the drilled area by using an end mill until 2mm of machining allowance is reserved at the bottom of the annular groove and 0.2mm of machining allowance is reserved at one side of the groove wall;
performing secondary semi-finishing, namely extending the ball-end milling cutter into the annular groove for milling until the bottom of the annular groove is milled;
and (5) finish machining, namely finish machining is carried out on the ring groove by adopting a ball-end milling cutter to obtain the ring groove.
Furthermore, the drilling of drilling processing is a plurality of, and a plurality of drilling are arranged along annular circumference, and the drill way separation of two adjacent drilling, and the downthehole intercommunication of two adjacent drilling.
Furthermore, the included angle of the central lines of two adjacent drill holes is 5.5-6 degrees.
Further, the drilling uses a phi 5.5 drill bit.
Further, the first semi-finishing comprises the following steps: the method comprises the steps of installing a high-temperature alloy case on a numerical control machine tool through a clamp, establishing G54, installing an end mill, enabling the end mill to be in contact with the high-temperature alloy case in a descending mode, enabling a rotary table on the numerical control machine tool to drive the high-temperature alloy case to rotate in the circumferential direction, enabling the end mill to move a distance of one diameter of the end mill along the X-axis direction, removing a first-layer ring groove through milling, enabling the end mill to retreat to a safe distance along the Z-axis, feeding the end mill to the ring groove, enabling the rotary table to drive the high-temperature alloy case to rotate in the circumferential direction, enabling the end mill to move a distance of one diameter of the end mill along the X-axis direction, removing a second-layer ring groove through milling, and reserving … … until 2mm is reserved at the bottom of the ring groove and 0.2mm of machining allowance is reserved on a single side of the groove wall.
Further, each layer of ring grooves is removed in a layer thickness of 2 mm.
Further, the end mill employs a Φ 5 end mill.
Further, the second semi-finishing comprises the following steps: installing a ball milling cutter, wherein the ball milling cutter enters an annular groove downwards and is located at a position which is 1mm away from the bottom of the annular groove in the Z-axis direction, a rotary table on a numerical control machine tool drives a high-temperature alloy case to rotate circumferentially, meanwhile, the ball milling cutter moves a distance of the diameter of the ball milling cutter in the X-axis direction, a first layer of groove bottom is removed through milling, the ball milling cutter moves a safe distance of tool withdrawal along the Z-axis, then the ball milling cutter feeds the bottom of the annular groove and contacts with the groove bottom, the rotary table drives the high-temperature alloy case to rotate circumferentially, meanwhile, the ball milling cutter moves a distance of the diameter of the ball milling cutter in the X-axis direction, and the groove bottom processing of the annular groove is completed through milling.
Further, the thickness of the groove bottom of the first layer removed is 1 mm.
Further, the ball end mill adopts a phi 4 ball end mill.
The invention has the following beneficial effects:
the method for processing the ring groove of the high-temperature alloy casing comprises rough processing, primary semi-finishing processing, secondary semi-finishing processing and finishing processing. The machining area is subjected to drilling rough machining through drilling to remove most of allowance, and the follow-up milling allowance is reduced to reduce the phenomenon of tool vibration. In addition, in the drilling process, the drill bit is not subjected to radial force but only axial force, so that the machining vibration is reduced, the phenomena of edge breakage and knife hitting of the cutter caused by vibration are eliminated, and the service life of the cutter is prolonged. In addition, the drilling provides a chip removal channel for milling, so that the chip removal effect is improved, the tool breakage phenomenon is reduced, the service life of the tool is prolonged, a cooling liquid circulation channel is formed, and the milling cooling effect is improved. According to different processing modes, different cutters are adopted to process different parts of the ring groove in a targeted manner, so that a new method for processing the ring groove is realized, the processing efficiency of the ring groove is improved, and the obtained ring groove meets the requirements on size and precision.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic illustration of a ring groove of a superalloy case of the present invention;
FIG. 2 is a schematic diagram of the rough machining of the preferred embodiment 1 of the present invention;
FIG. 3 is an enlarged partial view of the rough machining of the preferred embodiment 1 of the present invention;
FIG. 4 is a diagram showing effects after rough machining in the preferred embodiment 1 of the present invention;
FIG. 5 is a starting position for the first semi-finishing of the preferred embodiment 1 of the present invention;
FIG. 6 is the end position of the first semi-finishing of the preferred embodiment 1 of the present invention;
FIG. 7 is a first semi-finished end mill path of travel according to the preferred embodiment 1 of the present invention;
fig. 8 is an effect diagram after the first semi-finishing of the preferred embodiment 1 of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
FIG. 1 is a schematic illustration of a ring groove of a superalloy case of the present invention; FIG. 2 is a schematic diagram of the rough machining of the preferred embodiment 1 of the present invention; FIG. 3 is an enlarged partial view of the rough machining of the preferred embodiment 1 of the present invention; FIG. 4 is a diagram showing effects after rough machining in the preferred embodiment 1 of the present invention; FIG. 5 is a starting position for the first semi-finishing of the preferred embodiment 1 of the present invention; FIG. 6 is the end position of the first semi-finishing of the preferred embodiment 1 of the present invention; FIG. 7 is a first semi-finished end mill path of travel according to the preferred embodiment 1 of the present invention; fig. 8 is an effect diagram after the first semi-finishing of the preferred embodiment 1 of the present invention.
As shown in fig. 1, fig. 2 and fig. 3, the method for processing the ring groove of the superalloy casing of the present embodiment, where the ring groove has a fan-shaped structure, includes the following steps:
rough machining, namely determining a machining area on the high-temperature alloy casing according to design requirements, and vertically drilling the machining area by adopting drilling to remove most machining allowance;
performing primary semi-finishing, namely milling the drilled area by using an end mill until 2mm of machining allowance is reserved at the bottom of the annular groove and 0.2mm of machining allowance is reserved at one side of the groove wall;
performing secondary semi-finishing, namely extending the ball-end milling cutter into the annular groove for milling until the bottom of the annular groove is milled;
and (5) finish machining, namely finish machining is carried out on the ring groove by adopting a ball-end milling cutter to obtain the ring groove.
The method for processing the ring groove of the high-temperature alloy casing comprises rough processing, primary semi-finishing processing, secondary semi-finishing processing and finishing processing. The machining area is subjected to drilling rough machining through drilling to remove most of allowance, and the follow-up milling allowance is reduced to reduce the phenomenon of tool vibration. In addition, in the drilling process, the drill bit is not subjected to radial force but only axial force, so that the machining vibration is reduced, the phenomena of edge breakage and knife hitting of the cutter caused by vibration are eliminated, and the service life of the cutter is prolonged. In addition, the drilling provides a chip removal channel for milling, so that the chip removal effect is improved, the tool breakage phenomenon is reduced, the service life of the tool is prolonged, a cooling liquid circulation channel is formed, and the milling cooling effect is improved. According to different processing modes, different cutters are adopted to process different parts of the ring groove in a targeted manner, so that a new method for processing the ring groove is realized, the processing efficiency of the ring groove is improved, and the obtained ring groove meets the requirements on size and precision.
The high-temperature alloy casing is cast by high-temperature alloy K4169. The groove width of the processed ring groove is 6mm, the depth is 16mm, and the ring angle is 170 degrees, so that the ring groove belongs to a deep and narrow ring groove which is difficult to process. However, for rough machining of materials difficult to machine, the existing alloy corn milling cutter is usually suitable, the corn milling cutter has a larger chip groove and cutting force compared with a common alloy milling cutter, and the corn milling cutter can bear radial force and axial force due to a smaller front angle and a larger chamfer angle, so that the alloy corn milling cutter is suitable for rough machining with large allowance. The common corn milling cutter in the market has the minimum size of phi 8, but the groove width of the ring groove to be processed is a deep and narrow ring groove with the depth of 6mm, so that the alloy corn milling cutter is not suitable for use, and only the alloy milling cutter can be selected. Although alloy milling cutters have the characteristic of high hardness, the alloy milling cutters are not suitable for rough machining for difficult-to-machine materials, and the small-diameter cutters are poor in overall rigidity, so that vibration is easily generated in the machining process to accelerate the abrasion of the clamp, and further the cutters are broken. In addition, because the machining part is a ring groove, feeding is realized by rotating the high-temperature alloy case, the machining process is a four-shaft linkage process, the cutter is always positioned at the position of the center X0 of the high-temperature alloy case, cutting feeding is realized by rotating the A shaft, the bottom edge of the cutter cuts while the high-temperature alloy case rotates, the center of the bottom edge of the cutter is not provided with a cutting edge, even if the cutting edge exists, the linear speed of the point is 0, the cutter is equivalent to extrusion cutting at the point, the point is also the position with the weakest cutting capability of the cutter, and in the process of rotating and feeding the A shaft, the cutter simultaneously receives axial force and radial force, the axial force is greater than the radial force, and the alloy milling cutter is easy to vibrate to break teeth under the resultant force of the axial force and the radial force. Therefore, the rough machining of the invention creatively drills the machining area through drilling to remove most of allowance, and the problem of tooth breakage of the milling cutter cannot occur. In addition, the drill bit is not subjected to radial force, only axial force is applied, machining vibration is reduced, and the phenomena of edge breakage and tool beating of the tool due to vibration are eliminated.
As shown in fig. 2, 3 and 4, in the present embodiment, the drilling process is performed by a plurality of drill holes, the plurality of drill holes are arranged along the circumferential direction of the ring groove, the orifices of two adjacent drill holes are separated, and the orifices of two adjacent drill holes are communicated with each other. And drilling a row of drilling holes on the 170-degree ring groove along the circumferential direction of the ring groove. Because the ring groove is of a fan-shaped structure, and the arc lengths corresponding to different diameters are different, 1 drill hole is drilled at intervals of 5.5-6 degrees in order to remove allowance to the maximum extent through drilling, so that the orifices of two adjacent drill holes can be separated, but the holes of the two adjacent drill holes are communicated. On one hand, two holes in the ring groove are communicated to ensure the maximum removal rate of the allowance; on the other hand, the orifices of two adjacent drill holes at the notch are separated, so that the drill bit is ensured not to drift to the adjacent holes. Although the drill bit will shift towards the adjacent hole in the hole, the hole is separated separately, and the hole plays the role of a drill sleeve for the drill bit, so that the drill bit is ensured not to drift towards the adjacent hole in the hole.
In the embodiment, the included angle of the central lines of two adjacent drill holes is 5.5-6 degrees. Preferably, the included angle of the central lines of two adjacent drill holes is 5.87 degrees.
Preferably, the drilling is with a Φ 5.5 drill bit. The groove width of the ring groove is 6mm, and a phi 5.5 drill bit is adopted for drilling, so that after rough machining is finished, machining allowance of 0.25mm is reserved on the single side of the groove width of the ring groove.
As shown in fig. 5, 6 and 7, in the present embodiment, the first semi-finishing includes the steps of: the method comprises the steps of installing a high-temperature alloy case on a numerical control machine tool through a clamp, establishing G54, installing an end mill, enabling the end mill to be in contact with the high-temperature alloy case in a descending mode, enabling a rotary table on the numerical control machine tool to drive the high-temperature alloy case to rotate in the circumferential direction, enabling the end mill to move a distance of one diameter of the end mill along the X-axis direction, removing a first-layer ring groove through milling, enabling the end mill to retreat to a safe distance along the Z-axis, feeding the end mill to the ring groove, enabling the rotary table to drive the high-temperature alloy case to rotate in the circumferential direction, enabling the end mill to move a distance of one diameter of the end mill along the X-axis direction, removing a second-layer ring groove through milling, and reserving … … machining allowance of 2mm and 0.2mm on a single side of the groove wall until the bottom of the ring groove is reserved.
As shown in fig. 8, in the process of machining a material difficult to machine, the numerical control tool is likely to cause a tool back-off phenomenon due to wear or insufficient rigidity. Therefore, tool radius compensation is required to meet the machining dimensional accuracy. However, the tool compensation of the numerical control machine tool can be completed only in a straight line segment, and the left-right compensation and cutter back-off compensation of the tool are generally realized through left compensation G41 and right compensation G42. The A/B/C rotary table of the numerical control machine tool cannot be subjected to tool compensation in the rotating process. Because the cutter does not perform linear motion in the G17 plane, namely the X/Y coordinates of the cutter are not changed, even if the numerical control program has a left-complement G41 or a right-complement G42 command, the compensation is invalid. Therefore, the end mill moves by the distance of one end mill diameter along the X-axis direction, namely the machine tool rotary table drives the high-temperature alloy casing rotary table to rotate clockwise by 170 degrees, the process is a linkage process, namely the ring groove machining process is formed by the X-direction movement of the machine tool and the rotation of the C rotary table together, although the cutter compensation cannot be added in the C rotary table rotating process, the end mill moves by the distance of one end mill diameter along the X-axis direction to X2.5 from X-2.5, the compensation of the cutter can be carried out, the problem of abrasion compensation is solved, and the phenomenon that machining cannot be carried out on two sides of the ring groove is also solved.
In this embodiment, the thickness of each ring groove is 2 mm. The bottom surface of the ring groove is provided with a circle of round angle R2, the straight line section at the upper part of the ring groove is subjected to semi-finishing by a phi 5 end mill, the depth of the ring groove is 16mm, the upper part of the ring groove is processed by 14mm, the layer thickness removed according to each layer of ring groove is 2mm, and the upper part of the ring groove is milled for 7 times.
In this embodiment, a Φ 5 end mill is used as the end mill.
In this embodiment, the second semi-finishing process includes the following steps: installing a ball milling cutter, wherein the ball milling cutter enters the annular groove downwards and is located at a position which is 1mm away from the bottom of the annular groove on a Z axis, a rotary table on the numerical control machine tool drives a high-temperature alloy case to rotate circumferentially, meanwhile, the ball milling cutter moves a distance of a ball milling cutter diameter along the X axis direction, a first layer of groove bottom is removed through milling, the ball milling cutter retreats along the Z axis to a safe distance, then feeds to the bottom of the annular groove and contacts with the bottom of the annular groove, the rotary table drives the high-temperature alloy case to rotate circumferentially, meanwhile, the ball milling cutter moves a distance of a ball milling cutter diameter along the X axis direction, and groove bottom processing of the annular groove is completed through milling. Because the bottom surface of the ring groove is provided with a circle of R2 round corners, the round corners with the bottom surface of R2 are machined at the lower part of the machined ring groove by adopting a ball head milling cutter, and the groove bottom machining of the ring groove is completed.
In this embodiment, the thickness of the groove bottom of the first layer removed is 1 mm.
In this embodiment, the ball end mill adopts a Φ 4 ball end mill.
Examples
Example 1
Installing a special fixture on a five-axis numerical control machine tool, setting the positioning center of an alignment fixture as a G54 XY zero point, setting the angular orientation of the alignment fixture as the positive direction of an X axis, installing a high-temperature alloy casing on the positioning circle of the fixture, fixedly clamping, setting the excircle runout of an alignment part in the center of G54 within 0.01mm, and setting the upper surface of the alignment high-temperature alloy casing as a G54Z zero point;
rough machining, namely determining a machining area of a ring groove on a high-temperature alloy casing according to design requirements, wherein the groove width of the machined ring groove is 6mm, the depth of the machined ring groove is 16mm, and the ring angle is 170 degrees, installing a phi 5.5 drill bit on a numerical control machine tool, vertically drilling the machining area by adopting the phi 5.5 drill bit, drilling a row of drill holes on the 170-degree ring groove machining area along the circumferential direction of the ring groove, drilling 1 drill hole at intervals of 5.87 degrees, and drilling 29 holes in a public mode to separate the orifices of two adjacent drill holes, wherein the holes of the two adjacent drill holes are communicated so as to remove part of machining allowance, the rotating speed of the phi 5.5 drill bit is S1500, the feeding amount is F70, and the machining allowance of 0.25mm is reserved on one side of the groove width of the ring groove;
the first semi-finishing is carried out, a phi 5 end mill is installed, the phi 5 end mill is positioned on X-2.5 of G54 of a high-temperature alloy case, the phi 5 end mill descends to contact with the high-temperature alloy case, the phi 5 end mill mills, the feeding amount is F40, the rotating speed is S1200, a rotary table on a numerical control machine tool drives the high-temperature alloy case to rotate in the circumferential direction by 170 degrees, meanwhile, the end mill moves in the X-axis direction by a distance 5 of the diameter of the phi 5 end mill, the first layer of ring groove with the thickness of 2mm is removed through milling from X-2.5 to X2.5, the phi 5 end mill retreats to Z100 along the Z axis, the phi 5 end mill is positioned on X-2.5 of G54 of the high-temperature alloy case, the phi 5 end mill descends to contact with the ring groove for milling, the feeding amount is F40, the rotating speed is S1200, the rotary table drives the high-temperature alloy case to rotate in the circumferential direction, and the phi 5 end mill moves in the X-axis direction by a distance of the diameter of the phi 5 end mill to X2.5, removing a second layer of ring groove with the thickness of 2mm through milling processing, … …, until the seventh layer of ring groove is removed, so that 2mm of processing allowance is reserved at the bottom of the groove and 0.2mm of processing allowance is reserved at one side of the groove wall;
the second semi-finishing is carried out, a phi 4 ball-end milling cutter is installed, the phi 4 ball-end milling cutter is positioned on X-2 of G54 of the high-temperature alloy case, the phi 4 ball-end milling cutter descends into the annular groove and is positioned at a position 1mm away from the bottom of the annular groove on the Z axis, the phi 4 ball-end milling cutter is milled, the feeding amount is F20, the rotating speed is S1700, a rotary table on a numerical control machine tool drives the high-temperature alloy case to rotate circumferentially, the phi 4 ball-end milling cutter moves by a distance 4 of the diameter of the phi 4 ball-end milling cutter along the X axis direction, the first layer of groove bottom with the thickness of 1mm is removed from X-2 to X2 through milling, the phi 4 ball-end milling cutter retreats to Z100 along the Z axis and then feeds to the bottom of the annular groove, the phi 4 ball-end milling cutter is contacted with the bottom of the annular groove to mill for milling, the feeding amount is F20, the rotating speed is S1700, the high-temperature alloy case is driven to rotate circumferentially, and the phi 4 ball-end milling cutter moves by a distance of the diameter of the phi 4 ball-end milling cutter along the X axis direction to X2, removing the groove bottom of a second layer with the thickness of 1mm, and milling twice by using a phi 4 ball milling cutter to obtain the groove bottom of a ring groove with a round corner of R2;
and (4) finish machining, namely finish machining the groove wall of the ring groove by adopting a new phi 4 ball-end milling cutter, wherein the feed amount is F20, and the rotating speed is S2000, so that the ring groove is obtained.
Comparative example 1
The differences from example 1 are:
roughly machining, installing a phi 5 end mill, enabling the phi 5 end mill to be positioned on X0 of GD54 of a high-temperature alloy case, enabling the phi 5 end mill to descend to be in contact with the high-temperature alloy case, feeding the phi 5 end mill, wherein the feeding amount is F15, the rotating speed is S1200, a rotary table on a numerical control machine tool drives the high-temperature alloy case to rotate circumferentially, a first layer of ring groove with the thickness of 1mm is removed through milling, then the ring groove is fed, the feeding amount is F15, the rotating speed is S1200, the rotary table drives the high-temperature alloy case to rotate circumferentially, a second layer of ring groove with the thickness of 1mm is removed through milling, … … is carried out until the fourteenth layer of ring groove is removed, and a machining allowance of 2mm is reserved at the bottom of the groove and 0.3mm is reserved on one side of the groove wall;
semi-finishing, installing a phi 4 ball milling cutter, enabling the phi 4 ball milling cutter to be positioned on X0 of GD54 of a high-temperature alloy case, enabling the phi 4 ball milling cutter to downwards enter a ring groove and be in contact with the bottom of the ring groove, feeding the phi 4 end milling cutter, wherein the feeding amount is F20, the rotating speed is S1700, a rotary table on a numerical control machine tool drives the high-temperature alloy case to circumferentially rotate, a first layer of groove bottom with the thickness of 1mm is removed through milling, the phi 4 ball milling cutter retreats along a Z axis to a safe distance, then feeding is carried out to the bottom of the ring groove, the feeding amount is F20, the rotating speed is S1700, the rotary table drives the high-temperature alloy case to circumferentially rotate, a second layer of groove bottom with the thickness of 1mm is removed, and the phi 4 ball milling cutter is subjected to two times to milling treatment to obtain a ring groove bottom with a circle of R2 round corners;
and (4) finish machining, namely finish machining the groove wall of the ring groove by adopting a new phi 4 ball-end milling cutter, wherein the feed amount is F16, and the rotating speed is S2000, so that the ring groove is obtained.
The ring groove machining analysis of comparative example 1 above is shown in table 1. Wherein, the straight line segment of the upper part of the ring groove is roughly machined by a phi 5 end mill, each layer is milled for 1mm, 14 layers are milled, the milling time of each layer is long (200x 3.14/360 x170) ÷ 15 ═ 19.77 minutes, and the rough machining time of 14 layers is 19.77x14 ═ 277 minutes. Semi-finishing the circular arc section at the bottom of the circular groove by using a phi 4 ball-end milling cutter, wherein the milling time of each layer is long (200x3.14 ÷ 360x170x2) ÷ 12 ═ 49.42min, and the milling time of 2 layers is 49.42x2 ═ 98.85 min.
TABLE 1 analysis of ring groove machining for comparative example 1
The ring groove machining analysis of comparative example 1 above is shown in table 2.
TABLE 2 analysis of ring groove machining for example 1
As can be seen from tables 1 and 2, the method for machining the ring groove of the superalloy casing according to example 1 improves machining efficiency and reduces tool consumption.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for processing a ring groove of a high-temperature alloy casing is characterized by comprising the following steps of:
rough machining, namely determining a machining area on the high-temperature alloy casing according to design requirements, and vertically drilling the machining area by adopting drilling to remove most machining allowance;
performing primary semi-finishing, namely milling the drilled area by using an end mill until 2mm of machining allowance is reserved at the bottom of the annular groove and 0.2mm of machining allowance is reserved at one side of the groove wall;
performing secondary semi-finishing, namely extending the ball-end milling cutter into the annular groove for milling until the bottom of the annular groove is milled;
and (5) finish machining, namely finish machining is carried out on the ring groove by adopting a ball-end milling cutter to obtain the ring groove.
2. The method of claim 1, wherein the ring groove is machined by a machining process,
drilling processing's drilling is a plurality of, and is a plurality of drilling is followed annular circumference arranges, and adjacent two the drill way separation of drilling, adjacent two the downthehole intercommunication of drilling.
3. The method of claim 2, wherein the ring groove is machined by a machining tool,
the included angle of the central lines of two adjacent drill holes is 5.5-6 degrees.
4. The method of claim 2, wherein the ring groove is machined by a machining tool,
the drilling adopts a phi 5.5 drill bit.
5. The method of claim 1, wherein the ring groove is machined by a machining process,
the first semi-finishing comprises the following steps:
pass through anchor clamps with the superalloy case and install on digit control machine tool, establish G54, installation end mill, end mill down with the contact of superalloy case, the revolving stage drive on the digit control machine tool superalloy case circumferential direction, end mill moves the distance of an end mill diameter along X axle direction simultaneously, through milling process in order to get rid of the first layer annular, end mill moves back sword to safe distance along the Z axle, feeds into to the annular again, and the revolving stage drives superalloy case circumferential direction, end mill moves the distance of an end mill diameter along X axle direction simultaneously, through milling process in order to get rid of second floor annular, … …, reserve 2mm and the unilateral allowance of reserving 0.2mm of cell wall until the tank bottom of annular.
6. The method of claim 5, wherein the ring groove is machined by a machining process,
the layer thickness removed by each ring groove is 2 mm.
7. The method of claim 5, wherein the ring groove is machined by a machining process,
the end milling cutter adopts a phi 5 end milling cutter.
8. The method of claim 5, wherein the ring groove is machined by a machining process,
the second semi-finishing comprises the following steps:
installation ball end mill, ball end mill get into the annular down in, be in the position of 1mm apart from ring groove bottom in Z axle direction, the revolving stage on the digit control machine tool drives superalloy cartridge receiver circumferential direction, ball end mill moves the distance of a ball end mill diameter along X axle direction simultaneously, through milling process in order to get rid of the first layer tank bottom, ball end mill moves back the sword to safe distance along the Z axle, feeds to ring groove bottom again, and with ring groove bottom contact, the revolving stage drives high temperature alloy cartridge receiver circumferential direction, ball end mill moves the distance of a ball end mill diameter along X axle direction simultaneously, accomplishes the tank bottom processing tank bottom of annular through milling process.
9. The method of claim 8, wherein the ring groove is machined by a machining process,
the thickness of the groove bottom of the first layer is 1 mm.
10. The method of claim 8, wherein the ring groove is machined by a machining process,
the ball-end milling cutter adopts a phi 4 ball-end milling cutter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111488312.8A CN114131289B (en) | 2021-12-08 | 2021-12-08 | Method for machining annular groove of high-temperature alloy casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111488312.8A CN114131289B (en) | 2021-12-08 | 2021-12-08 | Method for machining annular groove of high-temperature alloy casing |
Publications (2)
| Publication Number | Publication Date |
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| CN114131289A true CN114131289A (en) | 2022-03-04 |
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