Cylindrical grinding and eccentric direction scribing device of eccentric shaft system

Abstract

The utility model discloses a cylindrical grinding and eccentric direction scribing device of an eccentric shaft system, which relates to the field of machining and comprises a mandrel body, positioning center grooves are arranged on end faces of two ends of the mandrel body, and the axes of the positioning center grooves and the axis of the excircle surface of the mandrel body are eccentrically arranged. The eccentric distance of the positioning center groove is matched with a workpiece to be machined, an eccentric positioning groove is formed in the side wall of one end of the mandrel body, and the length direction of the eccentric positioning groove and the eccentric direction of the positioning center groove are located on the same horizontal line. The scribing gasket is provided with a scribing boss, and the scribing boss can be inserted into the eccentric positioning groove; and the auxiliary clamping piece is used for clamping the core shaft body, the scribed line gasket and the workpiece to be machined. The problems that eccentric shaft system parts cannot be directly machined on a grinding machine, the direction of a scribed line in the eccentric direction of an eccentric shaft system is difficult to align after machining is completed, and machining is inconvenient are solved.

Description

Technical Field

[0001] The utility model relates to the field of mechanical processing, in particular to a device for grinding the outer circle of an eccentric shaft system and marking lines in an eccentric direction. Background Art

[0002] At present, high-precision machining of cylindrical surfaces of general parts is achieved by grinding. The grinding machine uses the rotational motion of the workpiece and the rotation and linear motion of the grinding tool to change the surface quality and precision size of the workpiece. The center of rotation of the part, that is, the axis of the outer cylindrical surface of the part, is required in the machining process.

[0003] However, due to shape restrictions, there is an eccentric distance between the rotation center and the axis center of the outer cylindrical surface of the eccentric shaft parts. Traditional clamping points are difficult to meet the processing requirements of the rotation center of the eccentric shaft parts, resulting in the eccentric shaft parts being unable to be directly processed on the grinding machine. In addition, the eccentric orientation of the eccentric shaft is difficult to find the correct orientation after processing, making processing inconvenient. Utility Model Content

[0004] The present application provides an external cylindrical grinding and eccentric direction marking device for an eccentric shaft system, which can solve the technical problems in the prior art that eccentric shaft system parts cannot be directly processed on a grinding machine, and the marking lines of the eccentric direction of the eccentric shaft system are difficult to find the correct position after processing, making processing inconvenient.

[0005] The embodiment of the present application provides an eccentric shaft system external cylindrical grinding and eccentric direction marking device, which includes:

[0006] A core shaft body, wherein the end surfaces at both ends of the core shaft body are provided with a positioning center groove, the axis of the positioning center groove is eccentrically arranged with the axis of the outer cylindrical surface of the core shaft body, and the eccentricity of the positioning center groove is adapted to the workpiece to be processed, and an eccentric positioning groove is provided on the side wall at one end of the core shaft body, and the length direction of the eccentric positioning groove is on the same horizontal line as the eccentric direction of the positioning center groove;

[0007] A scored washer, wherein the scored washer is provided with a scored boss, and the scored boss can be inserted into the eccentric positioning groove;

[0008] And, an auxiliary clamping piece, which is used to clamp the core shaft body and the engraved washer to the workpiece to be processed.

[0009] In one embodiment, the auxiliary clamping member includes:

[0010] clamping nut;

[0011] One end of the core shaft body provided with the positioning groove is provided with a matching thread on the side wall, and the clamping nut cooperates with the matching thread.

[0012] In one embodiment, the auxiliary clamping member further comprises:

[0013] A positioning pressure ring, which is used to be sleeved on the outside of the workpiece to be processed;

[0014] And, a clamping bolt, a plurality of threaded through holes are opened on the side of the positioning pressure ring, and the clamping bolt is inserted into the positioning pressure ring from the threaded through holes.

[0015] In one embodiment, the scored washer comprises:

[0016] A scored gasket, wherein a scored positioning groove is provided on the scored gasket along the radial direction of the scored gasket;

[0017] A positioning key is inserted into the engraved positioning groove, and the engraved boss is arranged on the positioning key.

[0018] In one embodiment, the positioning key is interference-inserted into the engraved positioning groove.

[0019] In one embodiment, the mandrel body comprises:

[0020] The workpiece mating end, the outer cylindrical surface processing portion and the tool clamping end are connected in sequence; the workpiece mating end is used to cooperate with the workpiece to be processed, and the eccentric positioning groove is provided on the workpiece mating end; the tool clamping end is used for clamping by a grinder.

[0021] In one embodiment, the cross-sectional area of ​​the outer cylindrical surface processing portion gradually decreases toward the workpiece mating end.

[0022] In one embodiment, a step surface is provided on the tool clamping end.

[0023] In one embodiment, the scored boss is interference fit with the eccentric positioning groove.

[0024] In one embodiment, the core shaft body is made of a rigid material.

[0025] The beneficial effects of the technical solutions provided in the embodiments of the present application include:

[0026] By opening a positioning center groove on the core shaft body, the positioning center groove of the core shaft body is eccentrically set to the axis center of the outer cylindrical surface of the core shaft body, and the eccentricity of the positioning center groove of the core shaft body is adapted to the eccentricity of the workpiece to be processed, when grinding the workpiece to be processed, the core shaft body is passed through the workpiece to be processed so that the outer cylindrical surface of the workpiece to be processed is located on the surface of the core shaft body, and the grinding of the workpiece to be processed can be achieved by directly clamping the two ends of the core shaft body; and a line washer is added to one end of the core shaft body, and the line washer is clamped on the workpiece to be processed by an auxiliary clamping part, so that the eccentric orientation of the workpiece to be processed can be marked, which is convenient for the eccentric orientation alignment process after the processing is completed, and solves the problem that eccentric shaft parts cannot be directly processed on the grinding machine, and the line of the eccentric orientation of the eccentric shaft system is difficult to align after the processing is completed, which makes the processing inconvenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] Figure 1 This is a schematic diagram of the overall structure of an eccentric shaft system cylindrical grinding and eccentric direction marking device after assembly;

[0029] Figure 2 This is an axial schematic diagram of an eccentric shaft system external cylindrical grinding and eccentric direction marking device in this application;

[0030] Figure 3 This is a schematic diagram of the structure of the core shaft body in this application;

[0031] In the figure: 1. Mandrel body; 11. Positioning center groove; 12. Workpiece matching end; 121. Eccentric positioning groove; 13. Outer cylindrical surface processing part; 14. Tool clamping end; 2. Marked washer; 21. Marked gasket; 22. Positioning key; 221. Marked boss; 3. Clamping nut; 31. Positioning pressure ring; 32. Clamping bolt; 4. Workpiece to be processed. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0033] An embodiment of the present application provides an external cylindrical grinding and eccentric direction marking device for an eccentric shaft system, which can solve the problem that eccentric shaft system parts cannot be directly processed on a grinding machine, and the eccentric direction marking lines of the eccentric shaft system are difficult to find the correct position after processing, making processing inconvenient.

[0034] Reference Figure 1 and Figure 2 The present application discloses an eccentric shaft external cylindrical grinding and eccentric direction marking device, comprising a mandrel body 1, a marking washer 2, and an auxiliary clamping member. A positioning center groove 11 is further provided on the end faces at both ends of the mandrel body 1. The axis of the positioning center groove 11 is eccentrically arranged with the axis of the external cylindrical surface of the mandrel body 1, and the eccentricity of the positioning center groove 11 is adapted to the eccentricity of the workpiece 4 to be machined, thereby reducing the eccentricity error during the machining process. When machining an eccentric shaft workpiece 4 to be machined, the mandrel body 1 is inserted into the workpiece 4 to be machined, and the two ends of the grinding tool are then clamped into the positioning center grooves 11 at both ends of the mandrel body 1. This clamps the mandrel body 1 and allows the workpiece 4 to be machined to be machined.

[0035] The scored washer 2 is used to mark and position the eccentricity of the workpiece 4 to be processed. An eccentric positioning groove 121 is provided on the side wall of one end of the mandrel body 1. The length direction of the eccentric positioning groove 121 is on the same horizontal line as the eccentricity direction of the positioning center groove 11. The scored washer 2 is provided with a scored boss 221. The scored boss 221 can be inserted into the eccentric positioning groove 121, so that the operator can use a marker to mark the workpiece 4 to be processed before or after processing. The scored boss 221 is set to the scoring station of the scored washer 2 according to the eccentricity of the workpiece 4 to be processed, and mark it according to the eccentricity of the workpiece 4 to be processed, which facilitates the alignment process of the workpiece 4 after processing. The scored boss 221 is configured to be a compression fit with the eccentric positioning groove 121 to enhance the tightness of the connection between the mandrel body 1 and the scored washer 2. During use, the core shaft body 1 is inserted into the inner hole of the workpiece 4 to be processed, and the engraved washer 2 is then fixed to the workpiece 4 using an auxiliary clamp, so that the axes of the outer cylindrical surface of the workpiece 4, the engraved washer 2, and the core shaft body 1 are coaxial. This allows for grinding of eccentric shaft workpieces, and facilitates subsequent alignment after processing. This solves the problem that eccentric shaft parts cannot be directly processed on a grinding machine, and that the engraved lines of the eccentric shaft are difficult to align after processing, making processing inconvenient.

[0036] More specifically, refer to Figure 3The core shaft body 1 includes a workpiece mating end 12, an outer cylindrical surface processing portion 13 and a tool clamping end 14 connected in sequence. The workpiece mating end 12 is used to insert into the workpiece 4 to be processed, the outer cylindrical surface processing portion 13 is used to carry the workpiece 4 to be processed, and the tool clamping end 14 is used for clamping by the grinder. The eccentric positioning groove 121 is opened at the workpiece mating end 12. When assembling the core shaft body 1 and the workpiece 4 to be processed, the workpiece mating end 12 of the workpiece 4 to be processed is inserted into the workpiece 4 to be processed, and the outer cylindrical surface of the workpiece 4 to be processed is mounted on the outer cylindrical surface processing portion 13, and the grinder clamps the tool clamping end 14.

[0037] Furthermore, in order to improve the assembly tightness between the core shaft body 1 and the workpiece to be processed 4, the cross-sectional area of ​​the outer cylindrical surface processing portion 13 toward the workpiece mating end 12 is gradually reduced, so that the side of the outer cylindrical surface processing portion 13 toward the workpiece mating end 12 is matched with a small gap between the workpiece to be processed 4, which makes it more convenient for the core shaft body 1 to be inserted into the workpiece to be processed 4. Since the cross-sectional area of ​​the side of the outer cylindrical surface processing portion 13 toward the tool clamping end 14 is getting larger and larger, the side of the outer cylindrical surface processing portion 13 toward the tool clamping end 14 can be clamped on the outside of the workpiece to be processed 4. Without the need for additional positioning parts, the workpiece to be processed 4 can be clamped, effectively reducing the possibility of the workpiece to be processed 4 falling off from the core shaft body 1 during the processing process.

[0038] In one embodiment of the present application, the inner hole of the workpiece 4 to be processed and the side of the outer cylindrical surface processing part 13 facing the workpiece mating end 12 are matched with a small clearance of H7 / h6, and the outer cylindrical surface processing part 13 is designed as a 1:2000 taper surface. Therefore, the cross-sectional area of ​​the outer cylindrical surface processing part 13 changes very little, which can facilitate the plug-in fit between the workpiece 4 to be processed and the core shaft body 1, and at the same time enable the core shaft body 1 to be firmly inserted in the workpiece 4 to be processed, and reduce the possibility of relative movement between the core shaft body 1 and the workpiece 4 to be processed during the processing process.

[0039] In order to facilitate the clamping of the mandrel body 1 by the grinding machine, refer to Figure 3 A step surface is provided on the tool clamping end 14 of the mandrel body 1 to provide a clamping position for the grinding machine, making it more convenient to use.

[0040] The line-engraving washer 2 includes a line-engraving gasket 21 and a positioning key 22. A line-engraving positioning groove is formed on the line-engraving gasket 21 along the radial direction of the line-engraving gasket 21. The positioning key 22 is inserted into the line-engraving positioning groove, and the line-engraving boss 221 is provided on the positioning key 22. With this split arrangement, after the workpiece mating end 12 of the mandrel body 1 has been passed through the workpiece 4 to be processed, the line-engraving gasket 21 can be first passed through the exit end of the mandrel body 1, and the line-engraving position of the line-engraving gasket 21 is adjusted to be on the same horizontal line as the eccentric direction of the mandrel body 1 and the workpiece 4 to be processed. Then, the positioning key 22 is inserted into the line-engraving positioning groove, and the line-engraving boss 221 is pressed into the eccentric positioning groove 121 of the mandrel body 1, thereby further reducing the error in the later line-engraving alignment.

[0041] Furthermore, the positioning key 22 is also pressed against the engraved positioning groove to improve the connection tightness between the positioning key 22 and the engraved gasket 21, thereby reducing the possibility of relative displacement between the engraved gasket 21 and the positioning key 22 during the grinding process of the workpiece 4 to be processed.

[0042] Reference Figure 1 and Figure 2 The auxiliary clamping parts include a clamping nut 3, and the workpiece matching end 12 of the core shaft body 1 is provided with a matching thread on the side wall. After the installation of the scored washer 2 and the core shaft body 1 is completed, the clamping nut 3 is screwed on the protruding end of the core shaft body 1. The clamping nut 3 can stably clamp the scored washer 2 on the core shaft body 1 and the workpiece 4 to be processed. At the same time, by tightening the clamping nut 3, the core shaft body 1 can be pushed into the length of the workpiece 4 to be processed, and the variable cross-section setting of the core shaft body 1 is combined to make the fit between the core shaft body 1 and the workpiece 4 to be processed tighter.

[0043] Furthermore, in order to facilitate the grinder to clamp the workpiece mating end 12 of the mandrel body 1, the auxiliary clamping parts also include a positioning pressure ring 31 and a clamping bolt 32. The positioning pressure ring 31 is arranged on the outside of the workpiece 4 to be processed, and a plurality of threaded through holes are opened on the side wall of the positioning pressure ring 31 so that the clamping bolt 32 can be threadedly connected in the threaded through holes. After completing the installation of the mandrel body 1, the workpiece 4 to be processed, the line washer 2 and the clamping nut 3, the positioning pressure ring 31 is sleeved on the outside of the workpiece 4 to be processed, and the clamping bolt 32 is tightened to complete the further locking and positioning of the workpiece 4 to be processed. The clamping bolt 32 protrudes from the outside of the positioning pressure ring 31, and the fork of the grinder can clamp the protruding clamping bolt 32 to complete the temporary positioning of the workpiece mating end 12 of the mandrel body 1, which is more convenient to use.

[0044] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0045] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0046] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A device for grinding the outer circle of an eccentric shaft and marking in an eccentric direction, characterized in that: It includes: A core shaft body (1), wherein end surfaces at both ends of the core shaft body (1) are provided with positioning center grooves (11), the axis of the positioning center groove (11) is eccentrically arranged with the axis of the outer cylindrical surface of the core shaft body (1), and the eccentricity of the positioning center groove (11) is adapted to the workpiece (4) to be processed, and an eccentric positioning groove (121) is provided on the side wall at one end of the core shaft body (1), and the length direction of the eccentric positioning groove (121) is located on the same horizontal line as the eccentric direction of the positioning center groove (11); A scored washer (2), wherein a scored boss (221) is provided on the scored washer (2), and the scored boss (221) can be inserted into the eccentric positioning groove (121); And, an auxiliary clamping piece, wherein the auxiliary clamping piece is used to clamp the core shaft body (1) and the engraved washer (2) with the workpiece (4) to be processed.

2. The device for cylindrical grinding and eccentric direction marking of an eccentric shaft system according to claim 1, characterized in that: The auxiliary clamping member comprises: Clamping nut (3); One end of the core shaft body (1) provided with a positioning groove is provided with a matching thread on the side wall, and the clamping nut (3) cooperates with the matching thread.

3. The device for cylindrical grinding and eccentric direction marking of an eccentric shaft system according to claim 2, characterized in that: The auxiliary clamping member also includes: A positioning pressure ring (31), wherein the positioning pressure ring (31) is used to be sleeved on the outside of the workpiece (4) to be processed; And, a clamping bolt (32), a plurality of threaded through holes are opened on the side of the positioning pressure ring (31), and the clamping bolt (32) is inserted into the positioning pressure ring (31) from the threaded through holes.

4. The device for cylindrical grinding and eccentric direction marking of an eccentric shaft system according to claim 1, characterized in that: The scored washer (2) comprises: A scored gasket (21), wherein a scored positioning groove is provided on the scored gasket (21) along the radial direction of the scored gasket (21); A positioning key (22) is inserted into the engraved positioning groove, and the engraved boss (221) is provided on the positioning key (22).

5. The device for cylindrical grinding and eccentric direction marking of an eccentric shaft system according to claim 4, characterized in that: The positioning key (22) is interference-inserted in the engraved positioning groove.

6. The device for cylindrical grinding and eccentric direction marking of an eccentric shaft system according to claim 1, characterized in that: The core shaft body (1) comprises: A workpiece mating end (12), an outer cylindrical surface processing portion (13), and a tool clamping end (14) are sequentially connected; the workpiece mating end (12) is used to cooperate with a workpiece (4) to be processed, and the eccentric positioning groove (121) is provided on the workpiece mating end (12); and the tool clamping end (14) is used for clamping by a grinding machine.

7. The device for cylindrical grinding and eccentric direction marking of an eccentric shaft system according to claim 6, characterized in that: The cross-sectional area of ​​the outer cylindrical surface processing portion (13) gradually decreases toward the workpiece matching end (12).

8. The device for cylindrical grinding and eccentric direction marking of an eccentric shaft system according to claim 6, characterized in that: A step surface is provided on the tool clamping end (14).

9. The device for cylindrical grinding and eccentric direction marking of an eccentric shaft system according to claim 1, characterized in that: The engraved boss (221) is interference-fitted with the eccentric positioning groove (121).

10. The device for cylindrical grinding and eccentric direction marking of an eccentric shaft system according to claim 1, characterized in that: The core shaft body (1) is made of rigid material.

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