Machining method of end face annular groove

Abstract

The invention discloses a machining method for an end face annular groove, and relates to the technical field of lathe machining. The machining method comprises the steps that S101, the end face of a to-be-machined part is subjected to rough machining to form the contour of the annular groove; s102, the to-be-machined part is rotated around the axis of the to-be-machined annular groove; s103, at least part of the inner wall of the contour of the annular groove is subjected to finish machining to form the annular groove, specifically, the V-shaped turning tool is moved to the first area, the part, close to the first side wall, of the inner wall of the annular groove is subjected to finish machining, the V-shaped turning tool is moved to the second area, and the part, close to the second side wall, of the inner wall of the annular groove is subjected to finish machining to form the annular groove; the second area is located on the other side, opposite to the axis of the annular groove, of the first area, and the first side wall and the second side wall are oppositely arranged. The problem that when the contour of the annular groove is subjected to finish machining, the V-shaped turning tool is adjusted to be reversely installed or a second V-shaped turning tool which is reversely installed is adopted to generate tool connecting marks or the roughness is not ideal due to the fact that a square-head groove tool is adopted for machining can be solved.

Description

Technical Field

[0001] This invention relates to the field of lathe machining technology, and in particular to a method for machining an annular groove on an end face. Background Technology

[0002] Because the accuracy of the annular groove profile formed by rough machining is different from the target requirements, at least part of the inner wall of the annular groove profile needs to be finished in the later stage to form an annular groove that meets the target requirements.

[0003] Figure 1 This is a schematic diagram showing the relationship between the V-shaped cutting tool and the annular groove, as shown below. Figure 1 As shown, for example, a V-shaped cutting tool can be used to finish the inner wall of the annular groove contour to form the annular groove. Because the V-shaped cutting tool itself has a certain orientation, when the V-shaped cutting tool (I) finishes the inner wall of the annular groove contour, it can only finish a portion of the inner wall (the right side of the annular groove contour), and cannot finish the entire interior of the annular groove 11 contour (the leftmost part of the annular groove contour cannot be finished). If finishing is required on the remaining inner wall, the V-shaped cutting tool needs to be disassembled and reversed to form a reverse-mounted V-shaped cutting tool (II), or a second reverse-mounted V-shaped cutting tool (II) needs to be used. In either case, errors will exist; inconsistent tool tip wear and height will also cause tool marks. Especially when the finishing accuracy requirement is high, these errors exceed the accuracy, ultimately resulting in the finished annular groove failing to meet the accuracy requirements. For example, a square-headed grooving cutter can be used to finish the inner wall of the annular groove to form an annular groove, but the inner wall roughness under this machining method is not ideal and it is prone to vibration. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a machining method for an annular groove on the end face, which can solve the problem that when the contour of the annular groove is finished, adjusting the V-shaped turning tool to be installed in reverse or using a second reverse-installed V-shaped turning tool will produce tool marks or the use of a square-head grooving tool will result in unsatisfactory surface roughness.

[0005] The specific technical solution of this invention is as follows:

[0006] A method for machining an annular groove on an end face, the method comprising:

[0007] S101: Rough machining is performed on the end face of the workpiece to form the outline of an annular groove;

[0008] S102: Rotate the workpiece around the axis of the annular groove to be processed;

[0009] S103: finishing at least part of the inner wall of the profile of the annular groove to form the annular groove, wherein the V-shaped tool is moved to a first region to finish the part of the inner wall of the annular groove close to the first side wall, the V-shaped tool is moved to a second region to finish the part of the inner wall of the annular groove close to the second side wall, the second region is located on the other side of the first region relative to the axis of the annular groove, and the first side wall and the second side wall are oppositely arranged.

[0010] Preferably, in step S103, the direction of the V-shaped tool is kept unchanged.

[0011] Preferably, in step S103, the part of the inner wall of the annular groove close to the first side wall at least includes one of the following: the first side wall of the annular groove, and the part of the bottom wall of the annular groove close to the first side wall.

[0012] The part of the inner wall of the annular groove close to the second side wall at least includes one of the following: the second side wall of the annular groove, and the part of the bottom wall of the annular groove close to the second side wall.

[0013] Preferably, in the process of finishing the part of the bottom wall of the annular groove close to the first side wall, the V-shaped tool is controlled to move from the direction close to the first side wall to the direction away from the first side wall for finishing turning, and then the V-shaped tool is controlled to exit the bottom wall of the annular groove in an arc movement manner.

[0014] and / or

[0015] In the process of finishing the part of the bottom wall of the annular groove close to the second side wall, the V-shaped tool is controlled to move from the direction close to the second side wall to the direction away from the second side wall for finishing turning, and then the V-shaped tool is controlled to exit the bottom wall of the annular groove in an arc movement manner.

[0016] Preferably, the region for finishing the part of the bottom wall of the annular groove close to the first side wall and the region for finishing the part of the bottom wall of the annular groove close to the second side wall have an overlapping part.

[0017] Preferably, the V-shaped tool and the annular groove satisfy the following relationship:

[0018] 0.5·Tan(180°-θ1-θ2)·A>B,

[0019] Wherein, θ1 represents the included angle between the V-shaped turning tool and the first side wall and the bottom wall of the annular groove, θ2 represents the tool tip angle of the V-shaped turning tool, A represents the width of the bottom wall of the annular groove, and B represents the depth of the annular groove.

[0020] Preferably, in step S101, the method specifically comprises: rotating the workpiece to be processed around the axis of the annular groove to be processed, and using a ball nose turning tool to process the profile of the annular groove layer by layer in the axial direction of the annular groove by adopting a multi-segment line moving turning track.

[0021] Preferably, in step S101, during the processing of a partial layer, when processing the side wall of part of the annular groove, the ball nose turning tool is fed in by adopting a circular arc line moving mode; then, the ball nose turning tool is turned in the radial direction of the annular groove by adopting a multi-segment line moving mode; when the ball nose turning tool moves to the other side wall of the annular groove, the ball nose turning tool is fed out by adopting a circular arc line moving mode to process the other side wall of part of the annular groove.

[0022] Preferably, in step S101, during the processing of a layer corresponding to the bottom wall of the annular groove, the ball nose turning tool is fed in by adopting a circular arc line moving mode to process the side wall of part of the annular groove, and then the ball nose turning tool is turned in the radial direction of the annular groove by adopting a multi-segment line moving mode, wherein the multi-segment line includes a straight line for processing the bottom wall of the annular groove; when the ball nose turning tool moves to the other side wall of the annular groove, the ball nose turning tool is fed out by adopting a circular arc line moving mode to process the other side wall of part of the annular groove.

[0023] Preferably, in step S101, the method specifically comprises: using a ball nose turning tool to process the bottom corner of at least one end of the bottom wall of the annular groove; wherein the ball nose turning tool is fed in by adopting a circular arc line moving mode to process one of the side wall and the bottom wall of part of the annular groove, and then when the ball nose turning tool is turned to the other of the side wall and the bottom wall of the annular groove by adopting a multi-segment line moving mode, the ball nose turning tool is fed out by adopting a circular arc line moving mode.

[0024] The technical scheme of the present application has the following remarkable beneficial effects:

[0025] 1. The processing method of the present application can complete the finish machining of the entire inner profile of the annular groove by using the same V-shaped turning tool without disassembling the V-shaped turning tool and changing the orientation of the V-shaped turning tool, so that there is no error caused by disassembling the V-shaped turning tool, and there is no error caused by using a second V-shaped turning tool installed in the opposite direction, and finally the annular groove processed by finish machining can meet higher precision requirements.

[0026] 2. This application uses a ball end insert to move in the radial direction of the annular groove in a turning trajectory that is at least partially arcuate to perform cutting. Since the ball end insert can maintain local small-range contact with the workpiece in real time, the cutting force on the ball end insert is small, and a higher feed value can be obtained, which can effectively improve the machining efficiency.

[0027] 3. The ball-end insert moves radially within the annular groove to perform cutting. The metal chips produced by the ball-end insert are short, fine fragments, not long, continuous chips. These chips are easily removed from both sides of the annular groove in the radial direction, preventing entanglement. Lubricating coolant can also be continuously sprayed onto the cutting edge of the ball-end insert, thus preventing deterioration of lubrication and cooling. This minimizes downtime for chip removal during the annular groove machining process, effectively improving machining efficiency, reducing the likelihood of operator injuries from chip removal, and significantly reducing insert wear, thereby lowering tooling costs.

[0028] Specific embodiments of the invention are disclosed in detail below with reference to the description and accompanying drawings, indicating how the principles of the invention can be employed. It should be understood that the embodiments of the invention are not therefore limited in scope. Features described and / or shown for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments. Attached Figure Description

[0029] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, guided by the teachings of this invention, can select various possible shapes and proportions to implement the invention according to specific circumstances.

[0030] Figure 1 This is a schematic diagram showing the relationship between a V-shaped cutting tool and an annular groove.

[0031] Figure 2 This is a flowchart illustrating the steps of the processing method for the annular groove on the end face in an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the ball end mill's moving cutting trajectory in an embodiment of the present invention;

[0033] Figure 4 These are the tool setting points for the ball-end insert in two feasible ways in this embodiment of the invention;

[0034] Figure 5 Fig. 1 is a schematic diagram of the size relationship between the V-shaped turning tool and the annular groove in the embodiment of the present application;

[0035] Figure 6 Fig. 2 is a schematic diagram of the V-shaped turning tool performing finish machining in the first region and the second region respectively in the embodiment of the present application;

[0036] Figure 7 Fig. 3 is a schematic diagram of the V-shaped turning tool performing finish machining in the overlapping part of the first region and the second region respectively in the embodiment of the present application.

[0037] Reference signs of the above drawings:

[0038] 1, workpiece; 11, annular groove; 2, ball nose insert; 3, V-shaped turning tool. DETAILED DESCRIPTION

[0039] The details of the application can be more clearly understood with reference to the drawings and the following description. However, the specific embodiments of the application described herein are intended for the purpose of explanation and are not intended to limit the application in any way. Based on the teachings of the application, those skilled in the art can conceive any possible modification of the application, which should be considered as falling within the scope of the application. It should be noted that when an element is referred to as "provided on" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there can be a middle element. The terms "mounting", "connection", "connection" should be interpreted broadly, for example, it can be a mechanical connection or an electrical connection, it can be a connection between two elements, it can be directly connected or indirectly connected through a medium. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for the purpose of illustration only and are not intended to be the only embodiment.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the specification of the present application is only for the purpose of describing specific embodiments and is not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0041] In order to solve the problem of traditional groove insert machining annular groove producing entangled scraps and low efficiency, a machining method of end face annular groove is proposed in the present application, Figure 2The step flow chart of the machining method of the end face annular groove in the embodiment of the present application is shown in Figure 2 The machining method of the end face annular groove can include the following steps:

[0042] S101: Rough machining is performed on the end face of the workpiece 1 to form the profile of the annular groove.

[0043] The radial cross section of the annular groove 11 to be machined can have various shapes, which are not limited in the present application. Generally, the annular groove 11 to be machined can have opposite first and second side walls and a bottom wall. In the cross section, the first and second side walls and the bottom wall can have different shapes, such as straight lines, curved lines, multi-segment lines, etc. In a preferred embodiment, the radial cross section of the annular groove 11 to be machined can be rectangular.

[0044] In the process of rough machining the end face of the workpiece 1 to form the profile of the annular groove, the specific machining method of the rough machining is not limited in the present application, which can adopt the rough machining method in the prior art, such as machining the profile of the annular groove by a conventional groove blade. Further, the profile of the annular groove can be machined by the ball-end blade 2 as described below.

[0045] Further, the annular groove 11 can be machined on one end face of the workpiece 1 by turning, that is, the annular groove 11 is in the shape of a ring, and the axis of the annular groove 11 is the rotation axis of the workpiece 1 during turning. The end face can intersect the rotation axis of the workpiece 1. Further, the end face can be substantially perpendicular to the rotation axis of the workpiece 1. Before the workpiece 1 is turned by the tool, the workpiece 1 is rotated around the axis of the annular groove 11 to be machined.

[0046] In the field of conventional metal cutting machining, when an annular groove needs to be machined on an end face, the machining method is usually to control the entire end face to rotate around the center, and to control the groove blade to repeatedly move vertically from top to bottom to cut the end face. In this process, the groove blade cutting produces continuous and long metal chips, which are easily entangled with each other during machining, resulting in difficult chip removal and serious deterioration of lubrication and cooling effect at the groove blade cutting position.

[0047] Due to the problem of metal chip winding, it is necessary to stop the machine for manual cleaning, which not only wastes the processing time and increases the non-cutting downtime, but also causes the operator to be injured. At the same time, due to the poor lubrication and cooling effect of the cutting area and the adverse effect of metal chip winding on the tool, the tool wear is aggravated, the replacement frequency is greatly increased, and the tool use cost is greatly increased. In addition, the problems of frequent stop and cleaning and tool wear make the overall processing efficiency of the annular groove low, which seriously affects the production progress and economic benefits. The existing traditional metal cutting machine annular groove processing method has the problems of poor chip removal, poor lubrication and cooling effect, long non-cutting downtime, large tool consumption, low processing efficiency and safety hazards.

[0048] To solve the above problems, as a feasible solution, in step S101, the workpiece 1 can be rotated around the axis of the annular groove 11 to be processed, and the ball nose tool 2 can be used to process the profile of the annular groove 11 in the axial direction of the annular groove 11 by moving in a multi-segment line. Wherein, the multi-segment line in computer aided design is understood as a continuous line composed of multiple connected straight lines and / or circular arcs.

[0049] In this step, Figure 3 The schematic diagram of the moving cutting track of the ball nose tool in the embodiment of the present application is shown in Figure 3 As shown, in the process of processing the profile of the annular groove 11 in the axial direction of the annular groove 11, in the process of processing part of the layer, when processing part of the side wall of the annular groove 11, the ball nose tool 2 moves in an arc line. After that, the ball nose tool 2 moves in a multi-segment line in the radial direction of the annular groove 11. The multi-segment line is similar to an arc line as a whole, but it is composed of multiple connected straight lines or circular arcs, which is convenient for the machine to control the ball nose tool. When the ball nose tool 2 moves to the other side wall of the annular groove 11, the ball nose tool 2 moves in an arc line to retreat, so as to process the other side wall of the annular groove 11.

[0050] The above process is repeated to form the profile of the annular groove 11 layer by layer in the axial direction of the annular groove 11 until the ball end cutter is about to form the bottom wall of the annular groove 11. In the process of machining the layer corresponding to the bottom wall of the annular groove 11, the ball end cutter 2 moves in an arc line to machine part of the side wall of the annular groove 11, and then the ball end cutter 2 moves in a plurality of line segments in the radial direction of the annular groove 11, including a straight line for machining the bottom wall of the annular groove 11. In the process of moving the ball end cutter 2 from the side wall of the annular groove 11 to the bottom wall of the annular groove 11, the ball end cutter 2 can move in a plurality of connected straight lines and / or circular arcs. When the ball end cutter 2 moves to the other side wall of the annular groove 11, the ball end cutter 2 moves in an arc line to machine the other side wall of the annular groove 11.

[0051] It should be noted that, Figure 3 The movement cutting trajectory of the ball end cutter in the ball end cutter is the movement trajectory of the tool setting point of the ball end cutter, and the tool setting point of the ball end cutter is not the center of the ball, Figure 4 The tool setting point of the ball end cutter in the ball end cutter is the intersection of the tangent line of the lowermost point of the ball and the tangent line of the rightmost point of the ball, as shown in Figure 4 The tool setting point of the ball end cutter in the ball end cutter is the intersection of the tangent line of the lowermost point of the ball and the tangent line of the rightmost point of the ball, as shown in Figure 4 The tool setting point of the ball end cutter in the ball end cutter is the intersection of the tangent line of the lowermost point of the ball and the tangent line of the rightmost point of the ball, as shown in

[0052] In contrast to the conventional groove cutter moving linearly in the axial direction of the annular groove 11 for cutting, the three cutting edges of the cutter on both sides and the bottom are in full contact with the workpiece 1, so that the cutting force on the groove cutter is large, resulting in a low machining efficiency. In the present application, the ball end cutter 2 moves in a cutting trajectory of at least part of a plurality of line segments in the radial direction of the annular groove 11 for cutting, and the ball end cutter 2 can be in real-time local small-range contact with the workpiece 1, so that the cutting force on the ball end cutter 2 is small, and a higher feed value and cutting depth can be obtained, which can effectively improve the machining efficiency.

[0053] As a possible embodiment, the feed value F can reach between 0.7-0.8mm / r or even higher during the process of forming the profile of the annular groove 11 layer by layer, wherein the feed value F is the amount of cutting along the cutting direction per revolution of the workpiece.

[0054] In addition, the ball-end cutter 2 moves in the radial direction of the annular groove 11 to perform cutting, and the metal chips generated by the ball-end cutter 2 are in the form of short and small pieces, rather than long and continuous pieces, so that the metal chips can be easily discharged from both sides of the radial direction of the annular groove 11, and the problem of mutual entanglement does not occur. In addition, the lubricating coolant can be continuously sprayed on the cutting position of the ball-end cutter 2, so that the problem of deterioration of the lubricating and cooling effect does not occur at the cutting position. In this way, the possibility of stopping for cleaning the metal chips during the entire machining process of the annular groove 11 can be reduced as much as possible, the machining efficiency is effectively improved, the possibility of the operator being cut by the metal chips during cleaning is reduced, and the degree of wear of the cutter can be greatly reduced, thereby reducing the use cost of the cutter.

[0055] In this step, as a possibility, during the machining process of forming the partial annular groove 11, the ball-end cutter 2 moves in the form of a circular arc to perform the feed-in when machining the side wall of the partial annular groove 11, and then the ball-end cutter 2 can move in the form of a superior arc or an inferior arc or the like to perform the turning in the radial direction of the annular groove 11, and can also move in the form of an elliptical arc, a hyperbolic arc, a parabolic arc or the like to perform the turning.

[0056] As a possibility, the feed amount can be set to be less than or equal to 25% of the tool radius R, and the feed amount here is the cutting depth, and the tool path radius can be set to be less than or equal to 20% of the tool radius R, so that a better side edge machining quality can be obtained while the efficiency is taken into account. The tool path radius can specifically refer to the circular arc radius value when the ball-end cutter 2 feeds in or feeds out.

[0057] In step S101, specifically, the bottom corner of at least one end of the bottom wall of the annular groove 11 can be machined by using the ball-end cutter 2.

[0058] Since the bottom corners of both ends of the bottom wall of the annular groove 11 are not fully turned during the above machining process, more residues are left, so that the ball-end cutter 2 can move in the form of a circular arc to perform the feed-in to machine one of the side wall and the bottom wall of the partial annular groove 11, and then the ball-end cutter 2 can move in the form of a multi-segment line to perform the turning to the other of the side wall and the bottom wall of the annular groove 11, and the ball-end cutter 2 can move in the form of a circular arc to perform the feed-out. When the ball-end cutter 2 moves in the form of a multi-segment line to perform the turning to the other of the side wall and the bottom wall of the annular groove 11, the ball-end cutter 2 can further perform a certain turning to the bottom corner of one end of the bottom wall of the annular groove 11. The above process is repeated to continuously perform the turning to the bottom corner of one end of the bottom wall of the annular groove 11. After the turning to the bottom corner of one end of the bottom wall of the annular groove 11 is completed, the turning to the bottom corner of the other end of the bottom wall of the annular groove 11 is performed.

[0059] By the above-mentioned manner, the ball nose blade 2 can be used to roughly process the profile of the annular groove 11. For the annular groove 11 at this time, since the ball nose blade 2 is used, the angle formed by the bottom wall and the side wall of the annular groove 11 is in an arc shape.

[0060] As a possibility, the movement of the ball nose blade 2 can be controlled by a CAM software dynamic turning module in this step.

[0061] As a possibility, the ball nose blade 2 can be provided with a PVD coating, specifically, an AlTiN coating, which has excellent deformation resistance and can increase the cutting speed of the ball nose blade 2 by 50%-100%.

[0062] S102: Rotating the workpiece 1 around the axis of the annular groove 11 to be processed.

[0063] In this step, the workpiece 1 is clamped on the turning machine, and the turning machine is started to drive the workpiece 1 to rotate around the axis of the annular groove 11 to be processed.

[0064] S103: Finishing at least part of the inner wall of the profile of the annular groove 11 to form the annular groove 11, wherein the V-shaped turning tool 3 is moved to a first area to finish the part of the inner wall of the annular groove 11 close to the first side wall, the V-shaped turning tool 3 is moved to a second area to finish the part of the inner wall of the annular groove 11 close to the second side wall, the second area is located on the other side of the first area relative to the axis of the annular groove 11, and the first side wall and the second side wall are oppositely arranged.

[0065] Since the precision of the ball nose blade 2 in processing the profile of the annular groove 11 is not up to the target requirement, at least part of the inner wall of the profile of the annular groove 11 needs to be finished to form the annular groove 11 meeting the target requirement.

[0066] In this step, the V-shaped turning tool 3 can be used to finish at least part of the inner wall of the profile of the annular groove 11 to form the annular groove 11. At least one of the following can be included in at least part of the inner wall of the profile of the annular groove 11: the opposite first side wall and the second side wall of the annular groove 11, and the bottom wall of the annular groove 11. Of course, when the opposite first side wall and the second side wall of the annular groove 11 and the bottom wall of the annular groove 11 are finished, the angle formed by the bottom wall and the side wall of the annular groove 11 can be processed into an angle formed by two straight lines, rather than an arc-shaped angle.

[0067] In step S103, Figure 6 The schematic diagram of the V-shaped turning tool in the first area and the second area for finishing in the embodiment of the present application is shown in FIG. 2. Figure 6As shown, the machining method can specifically include: moving the V-shaped tool 3 to a first region to finish machining the first side wall of the annular groove 11 and / or the part of the bottom wall of the annular groove 11 close to the first side wall; and moving the V-shaped tool 3 to a second region to finish machining the second side wall of the annular groove 11 and / or the part of the bottom wall of the annular groove 11 close to the second side wall, the second region being located on the other side of the first region relative to the axis of the annular groove 11.

[0068] In the radial direction of the annular groove 11, if the axis of the annular groove 11 is defined as the origin and the radial direction of the annular groove 11 is the X-axis, the first region can be located on the positive axis of the X-axis, and the second region can be located on the negative axis of the X-axis. The machining method described above can finish machining the entire inner part of the profile of the annular groove 11 with the same V-shaped tool 3 without disassembling the V-shaped tool 3 and changing the orientation of the V-shaped tool 3, so that there is no error caused by disassembling the V-shaped tool 3, and there is no error caused by using a second V-shaped tool 3 installed in the opposite direction, and the annular groove 11 finally machined can meet higher precision requirements.

[0069] As a possibility, in the process of finish machining the part of the bottom wall of the annular groove 11 close to the first side wall, the V-shaped tool 3 can be controlled to move from the direction close to the first side wall to the direction away from the first side wall for finish machining turning, and then the V-shaped tool 3 can be controlled to exit the bottom wall of the annular groove 11 in an arc movement. Similarly, in the process of finish machining the part of the bottom wall of the annular groove 11 close to the second side wall, the V-shaped tool 3 can be controlled to move from the direction close to the second side wall to the direction away from the second side wall for finish machining turning, and then the V-shaped tool 3 can be controlled to exit the bottom wall of the annular groove 11 in an arc movement.

[0070] In the above process, the V-shaped tool 3 can exit in a circular arc movement, and the circular arc is tangent to the bottom wall of the annular groove 11.

[0071] In the above process, Figure 7 A schematic view of the overlap of the finish machining of the V-shaped tool in the first region and the second region in the embodiment of the present application is shown in FIG. 4. Figure 7 As shown, the region for finish machining the part of the bottom wall of the annular groove 11 close to the first side wall overlaps with the region for finish machining the part of the bottom wall of the annular groove 11 close to the second side wall. For example, the length N of the overlap can be less than or equal to 0.5 mm. By the above method, the precision of the joint of the two machining processes can be further improved, and the trace of the tool mark can be further reduced.

[0072] As feasible, in the machining process of the bottom wall of the annular groove 11, the V-shaped turning tool 3 can be controlled to move in an arc line to the bottom wall of the annular groove 11, and further, the V-shaped turning tool 3 can be controlled to move in a circular arc line, so as to reduce the vibration marks generated by the contact points between the turning tool and the bottom wall.

[0073] In a specific embodiment, when the two side walls of the annular groove 11 and the bottom wall of the annular groove 11 are finished, the V-shaped turning tool 3 can be moved to the first region and moved from top to bottom, so as to complete the finishing of the first side wall of the annular groove 11, and then the V-shaped turning tool 3 is controlled to move from the direction close to the first side wall to the direction away from the first side wall to complete the finishing of the partial bottom wall of the annular groove 11. Then, the V-shaped turning tool 3 can be moved to the second region and moved from top to bottom, so as to complete the finishing of the second side wall of the annular groove 11, and then the V-shaped turning tool 3 is controlled to move from the direction close to the second side wall to the direction away from the second side wall to complete the finishing of the remaining partial bottom wall of the annular groove 11.

[0074] Since the V-shaped turning tool 3 itself has a certain width, when the two side walls of the annular groove 11 and the bottom wall of the annular groove 11 are finished, Figure 5 The size relationship between the V-shaped turning tool and the annular groove in the embodiment of the present application is shown in the figure. Figure 5 As shown, the V-shaped turning tool 3 and the annular groove 11 need to satisfy the following relationship:

[0075] 0.5·Tan(180°-θ1-θ2)·A>B,

[0076] Wherein, θ1 represents the included angle between the edge of the V-shaped turning tool facing the first side wall and the bottom wall of the annular groove 11, θ2 represents the angle of the tip of the V-shaped turning tool, A represents the width of the bottom wall of the annular groove 11, and B represents the depth of the annular groove 11.

[0077] When the above conditions are met, in the first region and the second region, the V-shaped turning tool 3 can complete the finishing of at least half of the width of the bottom wall of the annular groove 11, so as to complete the finishing of the entire region of the bottom wall of the annular groove 11. If the above conditions are not met, the V-shaped turning tool 3 will collide with at least one side wall of the annular groove 11, and the bottom wall finished in the first region and the bottom wall finished in the second region cannot have an overlapping amount.

[0078] All articles and references, including patent applications and publications, disclosed herein are hereby incorporated by reference for all purposes. The term "consisting essentially of to describe a combination shall include the elements, ingredients, components or steps identified, and such other elements, ingredients, components or steps that do not materially affect the basic and novel characteristics of the combination. The use of the term "comprising" or "including" to describe combinations of elements, ingredients, components or steps herein also is taken to mean that other elements, ingredients, components or steps are optional, and the use of the term "comprising" or "including" to describe combinations of elements, ingredients, components or steps herein also is taken to mean that other elements, ingredients, components or steps are optional, and that statements of

[0079] The various embodiments described in this specification are intended to be illustrative only and are not intended to limit the scope of the present application. The various embodiments presented are only by way of example and can be configured in various ways. The various embodiments described in this specification are intended to be illustrative only and are not intended to limit the scope of the present application. The various embodiments presented are only by way of example and can be configured in various ways. The various embodiments described in this specification are intended to be illustrative only and are not intended to limit the scope of the present application. The various embodiments presented are only by way of example and can be configured in various ways. The various embodiments described in this specification are intended to be illustrative only and are not intended to limit the scope of the present application. The various embodiments presented are only by way of example and can be configured in various ways. The various embodiments described in this specification are intended to be illustrative only and are not intended to limit the scope of the present application. The various embodiments presented are only by way of example and can be configured in various ways. The various embodiments described in this specification are intended to be illustrative only and are not intended to limit the scope of the present application. The various embodiments presented are only by way of example and can be configured in various ways. The various embodiments described in this specification are intended to be illustrative only and are not intended to limit the scope of the present application. The various embodiments presented are only by way of example and can be configured in various ways. The various embodiments described in this specification are intended to be illustrative only and are not intended to limit the scope of the present application. The various embodiments presented are only by way of example and can be configured in various ways. The various embodiments described in this specification are intended to be illustrative only and are not intended to limit the scope of the present application. The various embodiments presented are only by way of example and can be configured in various ways.

Claims

1. A method of machining an end face annular groove, characterized by, The method for machining the end face annular groove comprises: S101: forming a profile of an annular groove on a rough-machined end face of a workpiece to be machined; S102: rotating the workpiece to be machined around an axis of the annular groove to be machined; S103: performing finish machining on at least part of an inner wall of the profile of the annular groove to form the annular groove, wherein a V-shaped tool is moved to a first region to perform finish machining on a portion of the inner wall of the annular groove close to a first side wall, the V-shaped tool is moved to a second region to perform finish machining on a portion of the inner wall of the annular groove close to a second side wall, the second region is located on the other side of the first region with respect to the axis of the annular groove, and the first side wall and the second side wall are oppositely arranged.

2. The method of machining an end face annular groove according to claim 1, characterized by, In step S103, the direction of the V-shaped tool is kept unchanged.

3. The method of machining an end face annular groove according to claim 1, characterized by, In step S103, the portion of the inner wall of the annular groove close to the first side wall at least includes one of the following: the first side wall of the annular groove and a portion of the bottom wall of the annular groove close to the first side wall. The portion of the inner wall of the annular groove close to the second side wall at least includes one of the following: the second side wall of the annular groove and a portion of the bottom wall of the annular groove close to the second side wall.

4. The method of machining an end face annular groove according to claim 1, characterized by, In the process of performing finish machining on the portion of the bottom wall of the annular groove close to the first side wall, the V-shaped tool is controlled to move from a direction close to the first side wall to a direction away from the first side wall to perform finish machining turning, and then the V-shaped tool is controlled to exit the bottom wall of the annular groove in an arc movement manner. And / or In the process of performing finish machining on the portion of the bottom wall of the annular groove close to the second side wall, the V-shaped tool is controlled to move from a direction close to the second side wall to a direction away from the second side wall to perform finish machining turning, and then the V-shaped tool is controlled to exit the bottom wall of the annular groove in an arc movement manner.

5. The method of machining an end face annular groove according to claim 4, characterized by The region for performing finish machining on the portion of the bottom wall of the annular groove close to the first side wall overlaps with the region for performing finish machining on the portion of the bottom wall of the annular groove close to the second side wall.

6. The method of machining an end face annular groove according to claim 1, wherein The V-shaped tool and the annular groove satisfy the following relationship: 0.5·Tan(180°-θ1-θ2)·A>B, wherein θ1 represents an included angle between an edge of the V-shaped tool facing the first side wall and the bottom wall of the annular groove, θ2 represents a tool tip angle of the V-shaped tool, A represents a width of the bottom wall of the annular groove, and B represents a depth of the annular groove.

7. The method of machining a face-groove according to claim 1, wherein In step S101, specifically comprising: rotating the workpiece to be machined around the axis of the annular groove to be machined, and using a ball nose blade to perform layer-by-layer machining in the axis direction of the annular groove to form the profile of the annular groove by using a moving turning track in at least part of a multi-segment line.

8. The method of machining an end face annular groove according to claim 7, characterized by, In step S101, during the machining of the layer part, the ball-end cutter is fed in a circular arc line movement to machine part of the side wall of the annular groove; then, the ball-end cutter is turned in a multi-segment line movement in the radial direction of the annular groove, and a straight line in the multi-segment line is used to machine the bottom wall of the annular groove; when the ball-end cutter moves to the other side wall of the annular groove, the ball-end cutter is retracted in a circular arc line movement to machine the other side wall of the annular groove.

9. The method of machining an end face annular groove according to claim 8, wherein In step S101, during the machining of the layer part corresponding to the bottom wall of the annular groove, the ball-end cutter is fed in a circular arc line movement to machine part of the side wall of the annular groove; then, the ball-end cutter is turned in a multi-segment line movement in the radial direction of the annular groove, and a straight line in the multi-segment line is used to machine the bottom wall of the annular groove; when the ball-end cutter moves to the other side wall of the annular groove, the ball-end cutter is retracted in a circular arc line movement to machine the other side wall of the annular groove.

10. The method of machining an end face annular groove according to claim 7, wherein In step S101, specifically comprising: The ball-end cutter is used to machine the bottom corner of at least one end of the bottom wall of the annular groove; wherein the ball-end cutter is fed in a circular arc line movement to machine part of one of the side wall and the bottom wall of the annular groove, and then, when the ball-end cutter is turned in a multi-segment line movement to the other one of the side wall and the bottom wall of the annular groove, the ball-end cutter is retracted in a circular arc line movement.

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