Double-edge combined turning tool for machining end face of wheel

Abstract

A double-edge combined turning tool for machining the end face of a wheel belongs to the technical field of machining tools and comprises a tool handle, a turning tool bit, a turning tool bit, a turning tool bit, a turning tool bit, an outer cooling air inlet threaded connection hole and an outer cooling air inlet threaded connection hole, one end of the outer cooling air inlet channel is communicated with the outer cooling air inlet threaded connection hole, and the other end of the outer cooling air inlet channel is communicated with the outer cooling air outlet threaded connection hole; the universal connecting base is arranged on the knife handle through the outer cooling air outlet threaded connecting hole, and the other end is provided with an outer air outlet pipe; the tool nose unit is provided with a rough turning tool and a finish turning tool; and the internal cooling air inlet threaded connecting hole is formed in the position close to the tool nose unit and is provided with a rough turning cooling channel and a finish turning cooling channel. The double-tool-bit structure is reasonably designed, a rough turning tool and a finish turning tool are creatively integrated on one tool handle, the purpose that one tool executes a single working step and completes rough turning and finish turning at the same time is achieved, the cutting time is greatly shortened, the machining efficiency is obviously improved, and the double-tool-bit combined tool is worthy of being popularized and used in the industry.

Description

Technical Field

[0001] The invention relates to the technical field of machining tools, in particular to a double-edged combined turning tool for machining a wheel end face. Background Art

[0002] As an important part of the car, the wheel is not only a safety part, but also an appearance part. With the increasing proportion of wheel A-side fine wheel type in recent years, the processing efficiency of wheel surface fine turning has become a common problem that the wheel industry needs to solve urgently. At present, the surface fine turning of the wheel is processed after the wheel is painted. In order to ensure that the surface texture after fine turning is qualified and the paint film at the corners of fine turning is not damaged by the impact of chips, the surface fine turning of the wheel is usually processed by two single-edged tools in two steps of rough turning and fine turning. That is, the same turning trajectory requires two tools to turn twice to complete. However, due to the number of turning tool patterns and the paint film protection requirements of the turning corners, there is no room for improvement in processing efficiency.

[0003] Therefore, it is urgent to seek a new process that can transform surface processing from two-tool two-step processing to two-tool and single-step processing under the premise of existing processing surface texture and corner requirements. The development of double-edged tools that perform rough turning and fine turning in a single step has become one of the technical problems that technical personnel in this field need to solve urgently.

[0004] Therefore, in view of the problems existing in the prior art, the designer of this case, relying on many years of experience in this industry, actively researched and improved, and thus came up with the present invention, a double-edged combined turning tool for machining the end face of a wheel. Summary of the invention

[0005] The purpose of the present invention is to provide a double-edged combination turning tool for machining wheel end faces in view of the defects in the prior art, that the turning trajectory of the conventional wheel surface fine turning needs to be completed by two turning passes with two tools, and that the machining efficiency has no room for improvement due to the number of turning tool marks and the paint film protection requirements of the turning corners.

[0006] To achieve the purpose of the present invention, the present invention provides a double-edged combined turning tool for machining a wheel end surface, the double-edged combined turning tool for machining a wheel end surface comprising: The knife handle is arranged in a square knife rod, one end of the knife handle is integrally connected with the double knife head, and an external cooling air inlet threaded connection hole is arranged in the middle of the bottom surface of the other end of the knife handle; An external cooling air inlet passage is arranged through the middle of the bottom surface of the tool handle, one end of which is connected to the external cooling air inlet threaded connection hole, and the other end of which is connected to the external cooling air outlet threaded connection hole arranged on one side of the double cutter head of the tool handle; A universal connection base is arranged on the tool handle through the external cooling air outlet threaded connection hole, and an external air pipe is arranged at one end of the universal connection base which is different from the external cooling air outlet threaded connection hole; A tool tip unit comprises a rough turning tool and a fine turning tool, wherein the rough turning tool and the fine turning tool are symmetrically distributed with respect to the rotation center of the workpiece to be processed; An internal cooling air inlet threaded connection hole is arranged adjacent to the tool tip unit of the double cutter head, and a rough turning cooling channel and a fine turning cooling channel are respectively penetrated through the internal cooling air inlet threaded connection hole, one end of the rough turning cooling channel different from the internal cooling air inlet threaded connection hole is connected to the rough turning internal cooling air outlet groove, and one end of the fine turning cooling channel different from the internal cooling air inlet threaded connection hole is connected to the fine turning internal cooling air outlet.

[0007] Optionally, the outer cooling air inlet passage and the inner cooling air inlet duct connected to the inner cooling air inlet threaded connection hole are a circumferential channel and a radial channel inside the double cutter head, and are arranged perpendicular to each other in the axial direction.

[0008] Optionally, when the external cooling air inlet threaded connection hole is connected to the external pipeline, it is an M10×1.5 standard internal thread, the thread depth is 15~18mm, the height of the external cooling air inlet threaded connection hole from the upper end surface of the tool handle is 16~18mm, and the diameter of the external cooling air inlet channel is 6~8mm.

[0009] Optionally, when the inner cooling air intake threaded connection hole is connected to an external pipeline, it is an M8×1.0 standard internal thread with a thread depth of 15~16mm.

[0010] Optionally, the diameter of the rough turning cold channel is 2~3mm, the diameter of the fine turning cold channel is 2~3mm, the angle between the rough turning cold channel and the horizontal is 13~15°, and the angle between the fine turning inner cold channel and the horizontal is 2~3°.

[0011] Optionally, the tool tip angles of the rough turning tool and the fine turning tool both have a preset angle, the preset angle is less than 45°, and the tool tip arcs of the rough turning tool and the fine turning tool share a common center.

[0012] Optionally, the preset angles of the rough turning tool tip and the fine turning tool tip are 33-35°.

[0013] Optionally, the arc radius of the rough turning tool tip is 1.12-1.16 mm, and the arc radius of the fine turning tool tip is 1.2 mm.

[0014] Optionally, a turning profile difference △ between the rough turning tool and the fine turning tool is set, 0.04≤△≤0.08.

[0015] Optionally, the tool handle is a 25×25 mm square tool bar, and the rotation height of the workpiece to be processed is 25 mm.

[0016] Optionally, the tool handle is connected to the rough turning chip breaking boss at an angle of 140-150°.

[0017] Optionally, the rough turning chip breaking boss and the rough turning chip breaking groove are connected by an arc with a radius of 1.5-2 mm.

[0018] Optionally, the horizontal depth of the fine-turned external cooling exhaust notch is 10-12 mm, and the width of the exhaust notch is 6-7 mm.

[0019] Optionally, the rough turning tool rake angle is 6-7°, the cutting edge inclination angle is 7-8°, and the rough turning tool clearance angle and the fine turning tool clearance angle are both 7-8°.

[0020] Optionally, the rough turning tool and the fine turning tool are symmetrical about the upper end surface of the tool handle, and the corresponding distances between them and the upper end surface of the tool handle are equal and ≤5mm.

[0021] Optionally, the included angle between the outgoing air pipe and the upper end surface of the knife handle is 25-30°, and the included angle between the outgoing air pipe and the side surface of the knife head is 45-50°.

[0022] Optionally, the inner diameter of the outgoing air tube is 6 mm.

[0023] In summary, the double-edged combination turning tool for machining the wheel end face of the present invention rationally designs the structure of the double cutter head, creatively integrates the rough turning tool and the fine turning tool on a tool handle, and achieves the purpose of performing a single step with one tool to complete the rough turning and fine turning processing simultaneously by matching the external cooling air intake channels, internal cooling air intake threaded connection holes, and the rough turning cooling channels and fine turning cooling channels formed by diversion of the rough turning tool and the fine turning tool, as well as the positional relationship of the functional components between the tools. The double-edged combination turning tool for machining the wheel end face is an integral welding piece type, which is simple to manufacture, easy to replace, and low in cost, and the blade edge band can be re-sharpened after processing for multiple uses. Using this tool for processing, the cutting time is greatly reduced, and the processing efficiency is significantly improved, which is worthy of promotion and use in the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The front view of the double-edged combined turning tool for machining the wheel end face of the present invention is shown; Figure 2 The figure shows a top view of a double-edged combined turning tool for machining a wheel end face according to the present invention; Figure 3 The figure shows a left side view of the double-edged combined turning tool for machining the wheel end face according to the present invention; Figure 4 The figure shows an enlarged view of the double-cutting head of a double-edged combination turning tool for machining the end face of a wheel; Figure 5 The figure shows the difference in cutting profiles of a double-edged combination turning tool used for machining the wheel end face; Figure 6 for Figure 1A partial enlarged view of the box (in order to clearly show the dimension marking, the leader lines and figure marks have been deleted, so this view is only used to observe the dimension marking). DETAILED DESCRIPTION

[0025] The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] See also Figure 1~Figure 3 , Figure 1 and Figure 6 Shown is a front view of a double-edged combined turning tool for machining a wheel end face according to the present invention. Figure 2 Shown is a top view of the double-edged combined turning tool for machining the wheel end face according to the present invention. Figure 3 The left side view of the double-edged combined turning tool for machining the wheel end surface of the present invention is shown. The double-edged combined turning tool for machining the wheel end surface comprises: A knife handle 1, wherein the knife handle 1 is in the form of a square knife rod, one end of the knife handle 1 is integrally connected to a double knife head 2, and an external cooling air inlet threaded connection hole 3 is provided in the middle of the bottom surface of the other end of the knife handle 1; An external cooling air inlet passage 4 is provided through the middle of the bottom surface of the tool handle 1, one end of the external cooling air inlet threaded connection hole 3 is communicated with the external cooling air outlet threaded connection hole 5 provided on one side of the double cutter head 2 of the tool handle 1; A universal connection base 6, wherein the universal connection base 6 is arranged on the tool handle 1 through the external cooling air outlet threaded connection hole 5, and an external air pipe 7 is arranged at one end of the universal connection base 6 which is different from the external cooling air outlet threaded connection hole 5; The tool tip unit 8 comprises a rough turning tool 81 and a fine turning tool 82, wherein the rough turning tool 81 and the fine turning tool 82 are symmetrically distributed with respect to the rotation center of the workpiece to be processed; An inner cooling air inlet threaded connection hole 9, wherein the inner cooling air inlet threaded connection hole 9 is arranged adjacent to the tool tip unit 8 of the double cutter head 2, and a rough turning cooling channel 91 and a fine turning cooling channel 92 are respectively penetrated through the inner cooling air inlet threaded connection hole 9, an end of the rough turning cooling channel 91 different from the inner cooling air inlet threaded connection hole 9 is connected to the rough turning inner cooling air outlet groove 93, and an end of the fine turning cooling channel 92 different from the inner cooling air inlet threaded connection hole 9 is connected to the fine turning inner cooling air outlet port 94.

[0027] As a person skilled in the art, it is easy to understand that in order to ensure the cooling and lubrication effect of the double-edged combination turning tool for machining the wheel end face during use, the inner cooling air intake threaded connection hole 9 takes in air from the side of the double cutter head 2, and is divided into a rough turning cooling channel 91 and a fine turning cooling channel 92. The rough turning inner cold air outlet groove 93 connected to the rough turning cooling channel 91 is responsible for the cooling and lubrication of the rough turning tool tip 83, and its cooling direction is directly sprayed to the rough turning tool 81. The fine turning inner cold air outlet 94 connected to the fine turning inner cold channel 92 is responsible for the cooling and lubrication of the fine turning tool 84, and its cooling direction is directly sprayed to the fine turning tool 82.

[0028] Please continue reading Figure 1~Figure 3 During the fine turning process, aluminum chips will be generated on the front cutting edge. When the aluminum chips curl to the rough turning bottom support surface, they will be broken by further processing. Since the aluminum chips have limited chip removal space between the front cutting edge and the rough turning bottom support, the outgoing air pipe 7 is used to blow air in the opposite direction along the feeding direction to blow the aluminum chips to the unprocessed surface to avoid scratching the processed surface. The outgoing air pipe 7 is universally adjusted through the universal connection base 6 to flexibly adjust the air outlet direction, and can blow to the fine turning external cooling exhaust notch 85 between the rough turning bottom support and the fine turning front cutting edge to the maximum extent.

[0029] Please continue reading Figure 1 As a specific implementation, preferably, the outer cooling air inlet channel 4 and the inner cooling air inlet channel connected to the inner cooling air inlet threaded connection hole 9 are circumferential channels and radial channels inside the double cutter head 2, and are arranged perpendicular to each other in the axial direction. In order to avoid the influence of air intake on each other, further, the outer cooling air inlet channel 4 is located in the middle of the bottom surface of the tool handle 1, so that the outer cooling air inlet channel 4 and the inner cooling air inlet channel can be completely avoided from intersecting and penetrating, and they do not affect each other.

[0030] In order to ensure that the rough turning tool 81 and the fine turning tool 82 can simultaneously turn the surface of the workpiece to be processed during the processing, the rough turning tool 81 and the fine turning tool 82 are symmetrically distributed with respect to the rotation center of the workpiece to be processed, ensuring that the distance between the rough turning tool 81 and the fine turning tool 82 and the axial positioning point of the workpiece to be processed is consistent during processing.

[0031] At the same time, in order to reduce the temperature loss of the rough turning inner cooling outlet groove 93 and the fine turning inner cooling outlet 94 during machining, the inner cooling air inlet threaded connection hole 9 is arranged adjacent to the tool tip unit 8 of the double cutter head 2. The closer the distance, the smaller the temperature loss of the air outlet, and the better the corresponding cooling effect. The outer cooling air inlet threaded connection hole 3 and the inner cooling air inlet threaded connection hole 9 are both connected by threaded holes, which can effectively improve the air tightness of the interface, reduce the air intake pressure loss, and are easy to replace.

[0032] See also Figure 4 , Figure 5, and refer to Figure 1~Figure 3 , Figure 4 Shown is an enlarged view of the double cutter head of a double-edged combination turning tool for machining the end face of a wheel. Figure 5 The figure shows the difference in cutting profiles of a double-edged combination turning tool for machining the wheel end face. As a preferred embodiment of the present invention, more specifically, in order for the tool tip unit 8 to adapt to different surface machining shapes during machining, the tool tip angles of the rough turning tool 81 and the fine turning tool 82 both have a preset angle α. 1 , α 1 <45°, and the tool tip arcs of the rough turning tool 81 and the fine turning tool 82 share a common center. The turning profiles of the rough turning tool 81 and the fine turning tool 82 are set with a suitable profile difference △, which is a setting value of the existing processing technology. It can be set in advance before the double cutter head 2 is sharpened according to the existing processing technology, and can also be modified according to the actual processing effect. Preferably, 0.04≤△≤0.08.

[0033] In order to ensure that the tool handle 1 is adapted to the installation conditions of the wedge block on site, the tool handle 1 is preferably a 25×25 mm square tool bar, and the rotation height of the workpiece to be processed is h 1 The preferred size is 25 mm. During installation, the tool handle 1 can be adjusted to the actual processing position of the tool holder according to the corresponding wedge block.

[0034] When the external cooling air inlet threaded connection hole 3 is connected to the external pipeline, it is preferably an M10×1.5 standard internal thread with a thread depth of d 1 The preferred distance is 15-18 mm. The height h between the external cooling air inlet threaded connection hole 3 and the upper end surface of the tool handle 1 2 Preferably 16~18mm, external cooling air inlet passage diameter φ 1 Preferably 6~8mm.

[0035] The tool handle 1 and the rough turning chip breaking boss 86 are α 2 Angle connection, α 2 The angle is preferably 140-150°. The rough turning chip breaking boss 86 is connected to the rough turning chip breaking groove 87 by an R arc, and the R radius is preferably 1.5-2 mm.

[0036] When the inner cooling air inlet threaded connection hole 9 is connected to the external pipeline, it is preferably an M8×1.0 standard internal thread with a thread depth of d 2 Preferably 15~16mm.

[0037] The diameter of the rough turning cold channel 91 is φ 2 Preferably 2~3mm, the diameter of the finishing cold channel 92 is φ 3 The angle between the rough turning cold channel 91 and the horizontal is preferably 2-3 mm. 3 The preferred angle is 13~15°, and the angle between the cooling channel in fine turning and the horizontal is α 4Preferably 2~3°.

[0038] The horizontal depth w of the fine turning external cooling exhaust notch 85 is preferably 10-12 mm, and the exhaust notch width h 3 Preferably 6~7mm.

[0039] Please continue reading Figure 4 To ensure the rough turning and finishing effect, the rough turning tool rake angle α 5 and α 6 The preferred angle is 6~7°, the preferred rake angle is 7~8°, and the rough turning tool back angle is α 7 and the clearance angle α of the finishing tool 8 7~8° is preferred.

[0040] In order to adapt to the front shaping of different workpieces to be processed, the angle α between the rough turning tool tip 83 and the fine turning tool tip 84 is 1 , more preferably 33 to 35°; the arc radius R of the rough turning tool tip 83 1 The preferred radius is 1.12~1.16mm, and the arc radius R of the fine turning tool tip circle 84 2 The preferred standard arc radius is 1.2 mm.

[0041] In order to ensure that the rough turning and fine turning can completely process the surface of the workpiece to be processed during the machining process, the rough turning tool 81 and the fine turning tool 82 are symmetrical about the upper end surface of the tool handle 1, and the corresponding distance h between them and the upper end surface of the tool handle is 4 =h 5 To ensure that the surface machining knife marks are not cleaned in disorder, h is preferred. 4 =h 5 ≤5mm.

[0042] In order to ensure that aluminum chips are not accumulated on the front cutting edge after fine turning to avoid scratching the processed surface, the angle between the outgoing air pipe 7 and the upper end face of the tool handle 1 is α 9 The preferred angle is 25~30°, and the angle with the side of the blade is α 10 Preferably 45-50°. In order to ensure the outlet pressure, the inner diameter of the outlet air pipe 7 is φ 4 6mm is preferred.

[0043] Please continue reading Figure 5 , △1, △2 and △3 are intended to describe the difference in the cutting edge profile of the double-edged tool. During the cutting process, the edge profile of the upper tool is generally larger than the lower edge profile. This profile value is used to ensure that the upper tool reserves a reasonable cutting depth for the lower tool, and △1=△2=△3.

[0044] Obviously, the double-edged combination turning tool for machining the wheel end face of the present invention creatively integrates the rough turning tool 83 and the fine turning tool 84 on a tool handle 1 by rationally designing the structure of the double cutter head 2, and by matching the external cooling air intake channel 4, the internal cooling air intake threaded connection hole 9, the rough turning cooling channel 91 and the fine turning cooling channel 92 formed by the diversion of the rough turning tool 83 and the fine turning tool 84, as well as the positional relationship of the functional components between the tools, a tool can be used to perform a single step and complete the purpose of rough turning and fine turning at the same time. The double-edged combination turning tool for machining the wheel end face is an integral welding piece type, which is simple to manufacture, easy to replace, and low in cost. After the blade edge band is processed, it can be re-sharpened for multiple uses. When using this tool for machining, the cutting time is greatly reduced and the machining efficiency is significantly improved, which is worthy of promotion and use in the industry.

[0045] In summary, the double-edged combination turning tool for machining the wheel end face of the present invention rationally designs the structure of the double cutter head, creatively integrates the rough turning tool and the fine turning tool on a tool handle 1, and achieves the purpose of performing a single step with one tool to complete the rough turning and fine turning processing simultaneously by matching the external cooling air intake channels, internal cooling air intake threaded connection holes, and the rough turning cooling channels and fine turning cooling channels formed by diversion of the rough turning tool and the fine turning tool, as well as the positional relationship of the functional components between the tools. The double-edged combination turning tool for machining the wheel end face is an integral welding piece type, which is simple to manufacture, easy to replace, and low in cost, and the blade edge band can be re-sharpened after processing for multiple uses. Using this tool for processing, the cutting time is greatly reduced, and the processing efficiency is significantly improved, which is worthy of promotion and use in the industry.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A double-edged combined turning tool for machining wheel end faces, characterized in that: The double-edged combined turning tool for machining the wheel end surface comprises: The knife handle is arranged in a square knife rod, one end of the knife handle is integrally connected with the double knife head, and an external cooling air inlet threaded connection hole is arranged in the middle of the bottom surface of the other end of the knife handle; An external cooling air inlet passage is arranged through the middle of the bottom surface of the tool handle, one end of which is connected to the external cooling air inlet threaded connection hole, and the other end of which is connected to the external cooling air outlet threaded connection hole arranged on one side of the double cutter head of the tool handle; A universal connection base is arranged on the tool handle through the external cooling air outlet threaded connection hole, and an external air pipe is arranged at one end of the universal connection base which is different from the external cooling air outlet threaded connection hole; A tool tip unit comprises a rough turning tool and a fine turning tool, wherein the rough turning tool and the fine turning tool are symmetrically distributed with respect to the rotation center of the workpiece to be processed; An internal cooling air inlet threaded connection hole is arranged adjacent to the tool tip unit of the double cutter head, and a rough turning cooling channel and a fine turning cooling channel are respectively penetrated through the internal cooling air inlet threaded connection hole, one end of the rough turning cooling channel different from the internal cooling air inlet threaded connection hole is connected to the rough turning internal cooling air outlet groove, and one end of the fine turning cooling channel different from the internal cooling air inlet threaded connection hole is connected to the fine turning internal cooling air outlet.

2. The double-edged combined turning tool for machining the wheel end surface as claimed in claim 1, characterized in that: The outer cooling air inlet passage and the inner cooling air inlet duct connected to the inner cooling air inlet threaded connection hole are a circumferential passage and a radial passage inside the double cutter head, and are arranged perpendicular to each other in the axial direction.

3. The double-edged combined turning tool for machining the wheel end surface as claimed in claim 2, characterized in that: When the external cooling air inlet threaded connection hole is connected to the external pipeline, it is an M10×1.5 standard internal thread with a thread depth of 15~18mm. The height of the external cooling air inlet threaded connection hole from the upper end surface of the tool handle is 16~18mm, and the diameter of the external cooling air inlet channel is 6~8mm.

4. The double-edged combined turning tool for machining the wheel end surface as claimed in claim 2, characterized in that: When the inner cooling air inlet threaded connection hole is connected to the external pipeline, it is an M8×1.0 standard internal thread with a thread depth of 15~16mm.

5. The double-edged combined turning tool for machining the wheel end surface as claimed in claim 2, characterized in that: The diameter of the rough turning cold channel is 2~3mm, the diameter of the fine turning cold channel is 2~3mm, the angle between the rough turning cold channel and the horizontal is 13~15°, and the angle between the fine turning inner cold channel and the horizontal is 2~3°.

6. The double-edged combined turning tool for machining the wheel end surface as claimed in claim 1, characterized in that: The tool tip angles of the rough turning tool and the fine turning tool both have a preset angle, the preset angle is less than 45°, and the tool tip arcs of the rough turning tool and the fine turning tool share a common center.

7. The double-edged combined turning tool for machining the wheel end surface as claimed in claim 6, characterized in that: The preset angles of the rough turning tool tip and the fine turning tool tip are 33-35 degrees.

8. The double-edged combined turning tool for machining the wheel end surface as claimed in claim 6, characterized in that: The arc radius of the rough turning tool tip is 1.12-1.16 mm, and the arc radius of the fine turning tool tip is 1.2 mm.

9. The double-edged combined turning tool for machining the wheel end surface as claimed in claim 1, characterized in that: The turning profiles of the rough turning tool and the fine turning tool are set with a profile difference △, 0.04≤△≤0.

08.

10. The double-edged combined turning tool for machining the wheel end surface as claimed in claim 1, characterized in that: The tool handle is a 25×25 mm square tool bar, and the rotation height of the workpiece to be processed is 25 mm.

11. The double-edged combined turning tool for machining a wheel end surface as claimed in claim 1, characterized in that: The tool handle is connected to the rough turning chip breaking boss at an angle of 140-150 degrees.

12. The double-edged combined turning tool for machining a wheel end surface according to claim 1, characterized in that: The rough turning chip breaking boss and the rough turning chip breaking groove are connected by an arc, and the radius is 1.5-2mm.

13. The double-edged combined turning tool for machining a wheel end surface according to claim 1, characterized in that: The horizontal depth of the fine turning external cooling exhaust notch is 10-12 mm, and the width of the exhaust notch is 6-7 mm.

14. The double-edged combined turning tool for machining a wheel end surface according to claim 1, characterized in that: The front angle of the rough turning tool is 6-7°, the inclination angle of the cutting edge is 7-8°, and the back angle of the rough turning tool and the back angle of the fine turning tool are both 7-8°.

15. The double-edged combined turning tool for machining a wheel end surface according to claim 1, characterized in that: The rough turning tool and the fine turning tool are symmetrical about the upper end surface of the tool handle, and the corresponding distances with the upper end surface of the tool handle are equal and ≤5mm.

16. The double-edged combined turning tool for machining a wheel end surface according to claim 1, characterized in that: The included angle between the outgoing air pipe and the upper end face of the knife handle is 25~30°, and the included angle between the outgoing air pipe and the side face of the knife head is 45~50°.

17. The double-edged combined turning tool for machining a wheel end surface according to claim 1, characterized in that: The inner diameter of the outgoing trachea is 6 mm.

Images