Precise grinding machining tool for hub

Abstract

The invention belongs to the technical field of grinding tools, and discloses a hub precision grinding tool which comprises a chuck, a positioning mandrel, a connecting shaft, a fixing mandrel and a screwing nut which are sequentially arranged, the chuck is in threaded fit with the positioning mandrel, the positioning mandrel is in threaded fit with the connecting shaft, and the connecting shaft is in threaded fit with the screwing nut. An annular groove is formed in the end, close to the fixed mandrel, of the connecting shaft, a center through hole is formed in the center of the fixed mandrel and movably matched with the annular groove in a sleeved mode, a first outer annular groove is formed in the end, close to the connecting shaft, of the positioning mandrel, and a second outer annular groove is formed in the end, close to the connecting shaft, of the fixed mandrel. The inner diameter value of the first outer ring groove is equal to the inner diameter value of the second outer ring groove, and a machined part is arranged between the first outer ring groove and the second outer ring groove. According to the characteristics that the machined part is prone to deformation in structural machining and high in precision requirement, the machining problems that the part is high in precision and prone to deformation in machining are successfully solved.

Description

Technical Field

[0001] The invention belongs to the technical field of grinding tooling, and in particular relates to a tooling for precision grinding of a wheel hub. Background Art

[0002] In the process of parts grinding, we often encounter important parts with complex shapes, high surface accuracy requirements, and easy deformation during grinding. The previous processing method uses chuck clamping and multi-step processing, which leads to uneven force on the parts during processing, excessive form and position tolerances and surface accuracy, and low processing efficiency. In order to solve this problem, the tooling is designed for rapid clamping and positioning to improve processing efficiency and ensure part processing quality. Summary of the invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a tooling for precision grinding of wheel hubs, which effectively solves the problem of important parts with complex shapes, high surface accuracy requirements, and easy deformation during grinding; the use of chuck clamping and multi-step processing leads to uneven force on parts during the processing, excessive form and position tolerances and surface accuracy, and low processing efficiency.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tool for precision grinding of wheel hubs, comprising a chuck, a positioning mandrel, a connecting shaft, a fixed mandrel, and a tightening nut which are arranged in sequence, wherein the chuck and the positioning mandrel, the positioning mandrel and the connecting shaft, and the connecting shaft and the tightening nut are all threadedly matched, an annular groove is formed on the end of the connecting shaft close to the fixed mandrel, a center through hole is formed at the center of the fixed mandrel, the center through hole is movably sleeved with the annular groove, a first outer ring groove is formed on the end of the positioning mandrel close to the connecting shaft, a second outer ring groove is formed on the end of the fixed mandrel close to the connecting shaft, the inner diameter value of the first outer ring groove is equal to the inner diameter value of the second outer ring groove, and a processed part is arranged between the first outer ring groove and the second outer ring groove.

[0005] Preferably, the chuck is connected with an integral first stud, a first screw groove is formed at the center of one end of the positioning mandrel close to the chuck, and the first stud is threadably matched with the first screw groove.

[0006] Preferably, a second screw groove is formed on one end of the positioning mandrel close to the connecting shaft, and an integral second stud is connected to one end of the connecting shaft close to the positioning mandrel, and the second stud is threadably matched with the second screw groove.

[0007] Preferably, a third stud is connected to one end of the connecting shaft close to the tightening nut, a tail hole is formed at the center of the end of the third stud, a third screw groove is formed at the center of the tightening nut, and the third stud is threadedly matched with the third screw groove.

[0008] Preferably, a tool groove is provided on the outer wall of the tightening nut along its circumference, and the tool groove is movably plugged into and matched with a handle located outside the tightening nut.

[0009] Preferably, an inner groove is formed on one side of the tightening nut close to the connecting shaft, and the diameter of the inner groove is larger than the diameter of the central through hole on the fixed mandrel and smaller than the outer diameter of the fixed mandrel.

[0010] Preferably, the processed part is a wheel hub.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1) According to the characteristics of the machined parts that are easy to deform and have high precision requirements, the outer circle of the positioning mandrel and the fixed mandrel are clamped with the inner hole of the wheel hub, and the outer circle of the positioning mandrel and the fixed mandrel are clamped. The outer circle grinding process can be completed in one clamping by positioning the step end surface on the positioning mandrel and the fixed mandrel;

[0013] 2) The tooling successfully solved the processing problem of high-precision parts and easy deformation during processing;

[0014] 3) The device has a simple structure, is easy to assemble, is reusable, and has stable processing quality, which saves costs and improves economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0016] In the attached picture:

[0017] Figure 1 It is a schematic diagram of the exploded structure of the tooling for wheel hub precision grinding of the present invention;

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the tooling for precision grinding of wheel hubs of the present invention.

[0019] In the figure: 1. chuck; 101. first stud; 2. positioning mandrel; 201. first outer ring groove; 202. first screw groove; 203. second screw groove; 3. wheel hub; 4. fixing mandrel; 401. center through hole; 402. second outer ring groove; 5. connecting shaft; 501. annular groove; 502. second stud; 503. third stud; 504. tail hole; 6. tightening nut; 601. third screw groove; 602. tool groove; 603. inner groove; 7. handle. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments 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.

[0021] Depend on Figure 1-2 The present invention relates to a tooling for precision grinding of a wheel hub, comprising a chuck 1, a positioning spindle 2, a connecting shaft 5, a fixed spindle 4, and a tightening nut 6 which are arranged in sequence, wherein the chuck 1 and the positioning spindle 2, the positioning spindle 2 and the connecting shaft 5, and the connecting shaft 5 and the tightening nut 6 are all threadedly matched, an annular groove 501 is formed on the end of the connecting shaft 5 close to the fixed spindle 4, a central through hole 401 is formed at the center of the fixed spindle 4, the central through hole 401 is movably sleeved with the annular groove 501, a first outer ring groove 201 is formed on the end of the positioning spindle 2 close to the connecting shaft 5, a second outer ring groove 402 is formed on the end of the fixed spindle 4 close to the connecting shaft 5, the inner diameter value of the first outer ring groove 201 is equal to the inner diameter value of the second outer ring groove 402, and a processed part is arranged between the first outer ring groove 201 and the second outer ring groove 402;

[0022] It is designed in this way that when in use, the chuck 1 and the positioning core shaft 2 are first assembled together by threaded cooperation, and then the connecting shaft 5 and the positioning core shaft 2 are assembled together by threaded cooperation, and then the processed part is sleeved on the outside of the first outer ring groove 201 on the positioning core shaft 2, and then the center through hole 401 on the fixed core shaft 4 is sleeved on the annular groove 501 on the connecting shaft 5, and the second outer ring groove 402 on the fixed core shaft 4 is located on the inner side of the processed part, and then the tightening nut 6 is assembled at the end of the connecting shaft 5 by thread, and the fixed core shaft 4 is fixed by tightening the nut 6, so that the processed part is fixed between the first outer ring groove 201 and the second outer ring groove 402, thereby realizing the positioning and fixing process of the processed part.

[0023] It should be noted that when the tool is in use, the chuck 1 can be fixed on a three-jaw chuck on a lathe to facilitate grinding operations on the workpiece on the tool.

[0024] Specifically, an integral first stud 101 is connected to the chuck 1 , a first screw groove 202 is formed at the center of one end of the positioning mandrel 2 close to the chuck 1 , and the first stud 101 is threadedly matched with the first screw groove 202 .

[0025] Specifically, a second screw groove 203 is formed on one end of the positioning core shaft 2 close to the connecting shaft 5 , and an integral second stud 502 is connected to one end of the connecting shaft 5 close to the positioning core shaft 2 . The second stud 502 is threadedly matched with the second screw groove 203 .

[0026] Specifically, an integral third stud 503 is connected to one end of the connecting shaft 5 close to the tightening nut 6, a tail hole 504 is formed at the center of the end of the third stud 503, a third screw groove 601 is formed at the center of the tightening nut 6, and the third stud 503 is threadedly matched with the third screw groove 601; with this design, when the tooling needs to be installed on a grinding machine, the chuck 1 can be fixed by the three-jaw chuck on the grinding machine, and the tooling can be fixed by the tailstock top on the grinding machine to cooperate with the tail hole 504, and the outer cylindrical processing of the processed part can be completed by one clamping.

[0027] Specifically, a tool groove 602 is opened on the outer wall of the tightening nut 6 along its circumference, and the tool groove 602 is movably plugged into the handle 7 located on the outside of the tightening nut 6. This design facilitates the tightening or loosening of the tightening nut 6 through the cooperation between the handle 7 and the tool groove 602, so as to fix the processed parts.

[0028] Furthermore, an inner groove 603 is formed on one side of the tightening nut 6 close to the connecting shaft 5, and the diameter of the inner groove 603 is larger than the diameter of the central through hole 401 on the fixed core shaft 4 and smaller than the outer diameter of the fixed core shaft 4; such a design can ensure that the tightening nut 6 contacts and abuts against the fixed core shaft 4.

[0029] Specifically, the processed part is the wheel hub 3, or other thin-walled shaft parts. In this way, the tooling can support and fix the processed part from the inner sides of both ends, thereby reducing the possibility of deformation during processing.

Claims

1. A tool for precision grinding of wheel hubs, characterized in that: The invention comprises a chuck (1), a positioning mandrel (2), a connecting shaft (5), a fixed mandrel (4), and a tightening nut (6) which are arranged in sequence, wherein the chuck (1) and the positioning mandrel (2), the positioning mandrel (2) and the connecting shaft (5), and the connecting shaft (5) and the tightening nut (6) are all threadedly matched, an annular groove (501) is formed on the end of the connecting shaft (5) close to the fixed mandrel (4), a central through hole (401) is formed at the center of the fixed mandrel (4), the central through hole (401) and the annular groove (501) are movably sleeved, a first outer ring groove (201) is formed on the end of the positioning mandrel (2) close to the connecting shaft (5), a second outer ring groove (402) is formed on the end of the fixed mandrel (4) close to the connecting shaft (5), the inner diameter value of the first outer ring groove (201) is equal to the inner diameter value of the second outer ring groove (402), and a processed part is arranged between the first outer ring groove (201) and the second outer ring groove (402).

2. The tooling for precision grinding of wheel hub according to claim 1, characterized in that: The chuck (1) is connected with an integral first stud (101), and a first screw groove (202) is formed at the center of one end of the positioning mandrel (2) close to the chuck (1), and the first stud (101) is threadedly matched with the first screw groove (202).

3. The tooling for precision grinding of wheel hub according to claim 1, characterized in that: A second screw groove (203) is formed on one end of the positioning core shaft (2) close to the connecting shaft (5), and an integral second stud (502) is connected to one end of the connecting shaft (5) close to the positioning core shaft (2), and the second stud (502) is threadedly matched with the second screw groove (203).

4. The tooling for wheel hub precision grinding according to claim 1, characterized in that: A third stud (503) is integrally connected to one end of the connecting shaft (5) close to the tightening nut (6); a tail hole (504) is formed at the center of the end of the third stud (503); a third screw groove (601) is formed at the center of the tightening nut (6); and the third stud (503) is threadedly matched with the third screw groove (601).

5. The tooling for precision grinding of wheel hub according to claim 1, characterized in that: The outer wall of the tightening nut (6) is provided with a tool groove (602) along its circumference, and the tool groove (602) is movably plugged into and matched with a handle (7) located outside the tightening nut (6).

6. The tooling for wheel hub precision grinding according to claim 1, characterized in that: An inner groove (603) is formed on one side of the tightening nut (6) close to the connecting shaft (5), and the diameter of the inner groove (603) is greater than the diameter of the central through hole (401) on the fixed core shaft (4) and smaller than the outer diameter of the fixed core shaft (4).

7. The tooling for precision grinding of wheel hub according to claim 1, characterized in that: The processed part is a wheel hub (3).

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