Special detachable finish machining tool for high-precision gear shaft

Abstract

The utility model discloses a high-precision gear shaft detachable finish machining special tool which comprises two connecting pieces, the front ends of the connecting pieces are arranged in an outer hexagon head shape, the rear ends of the connecting pieces are cylindrical, external threads are arranged on the surfaces of the rear ends of the connecting pieces, and B-type center holes are formed in the middles of the front ends of the connecting pieces. The detachable tool special for finish machining of the high-precision gear shaft is simple in overall structure, convenient to disassemble and assemble with the gear shaft, low in manufacturing cost, capable of meeting finish machining procedures of finish turning, cylindrical grinding, gear grinding and the like of gear shafts of different gear boxes, wide in application range and capable of effectively improving machining efficiency.

Description

TECHNICAL FIELD

[0001] The utility model belongs to processing frock technical field, especially relate to a high accuracy gear shaft detachable special frock of finish machining. BACKGROUND

[0002] Gear shaft as wind power gear box and process gear box internal core spare part, grinding precision requirement ISO1328-5 level, outer circle coaxiality requirement is ≤ phi 0.02, cylindricity is ≤ 0.01, traditional processing procedure is rough turning→ tempering→ half fine turning→ carburizing quenching→ fine turning→ center hole reaming→ outer circle grinding→ gear grinding, with large-scale design, gear shaft center hole is designed as C type center hole CM30 and above from B type center D6.3, and it has hoisting, processing, turning and other functions. However, the surface hardness of CM30 center hole carburizing quenching is greater than or equal to HRC55, and the center drill processing efficiency is low in the center hole reaming process due to the high surface hardness, and there is no gear grinding center. SUMMARY

[0003] To solve the above-mentioned problems in the prior art, the utility model provides a high-precision gear shaft detachable special frock for finish machining, which comprises two connecting pieces, wherein: the front end of the connecting piece is provided in the form of an outer hexagonal head, the rear end of the connecting piece is provided in the form of a cylinder, and an external thread is arranged on the surface of the rear end of the connecting piece, and a B-type center hole is arranged in the middle of the front end of the connecting piece.

[0004] Further, in the high-precision gear shaft detachable special frock for finish machining, the connecting piece is made of 42CrMo material.

[0005] Further, in the high-precision gear shaft detachable special frock for finish machining, the external thread has a size of M30 or above.

[0006] Further, in the high-precision gear shaft detachable special frock for finish machining, the B-type center hole has a size of D6.3.

[0007] The high-precision gear shaft detachable special frock for finish machining has the following advantages and beneficial effects:

[0008] The high-precision gear shaft detachable special frock for finish machining has a simple overall structure, is convenient to disassemble and assemble with the gear shaft, has low manufacturing cost, can meet the fine turning, outer circle grinding and gear grinding process of different gear shafts of gear boxes, has a wide range of applications, and effectively improves the processing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0009] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for further understanding of the embodiments of the present invention and constitute a part of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0010] Figure 1 This is a schematic diagram of the special tooling structure for detachable precision machining of high-precision gear shafts according to this utility model;

[0011] Figure 2 This is a schematic diagram of the high-precision gear shaft detachable finishing tooling and gear shaft installation according to this utility model;

[0012] Figure 3 for Figure 2 A magnified schematic diagram of the structure of I.

[0013] Explanation of reference numerals in the attached figures:

[0014] 100: Gear shaft; 200: Center hole;

[0015] 1: Connector; 11: External thread; 12: Type B center hole. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0017] like Figures 1 to 3 As shown, the high-precision gear shaft detachable precision machining tooling of this utility model includes two connecting parts 1, wherein: the front end of the connecting part 1 is set in the shape of an external hexagonal head, the rear end of the connecting part 1 is cylindrical and its surface is provided with external threads 11, and the middle of the front end of the connecting part 1 is provided with a B-type center hole 12.

[0018] Furthermore, in the aforementioned high-precision gear shaft detachable finishing fixture, the connecting part 1 is made of 42CrMo material.

[0019] Furthermore, in the aforementioned high-precision gear shaft detachable finishing tooling, the external thread 11 specification is M30 or higher, which meets the requirements for finishing the center holes of different diameters on the gear shaft.

[0020] Further, in the high-precision gear shaft detachable finishing special tooling, the B-type center hole 12 has a D6.3 specification.

[0021] Specifically, the finish machining procedure selects an outer thread 11 specification matched with the center hole 200, and screws the high-precision gear shaft detachable finishing special tooling into the center hole 200 with a CM30 specification or above at both ends of the gear shaft 100 through the outer thread 11, aligns the gear pitch circle, and the angular tolerance is ≯0.02mm. In order to eliminate the installation error of the outer thread 11 and the center hole 200 of the gear shaft 100, the B-type center hole 12 arranged at the middle of the front end of the connecting piece 1 is expanded and drilled until the coaxiality requirement of the part machining is met. In the outer circle grinding procedure, one end of the connecting piece 1 is clamped, and the B-type center hole 12 arranged at the middle of the front end of the other end of the connecting piece 1 is pressed, the coaxiality requirement of the outer circle is rechecked ≯φ0.02mm, the outer circle grinding procedure is completed after alignment, the coaxiality requirement of the outer circle is guaranteed to be φ0.02mm, the cylindricity is 0.01mm, the B-type center hole 12 arranged at the middle of the front end of the connecting piece 1 installed at both ends is pressed by a center in the gear grinding machine, the outer circle and the end face tolerance are aligned ≯0.02mm, the gear grinding procedure is completed, the gear precision is guaranteed to meet the ISO 1328-5 grade precision, and the connecting piece 1 is removed after the machining is completed, which can be reused to guarantee the part machining precision.

[0022] Compared with the prior art, the high-precision gear shaft detachable finishing special tooling has the following advantages and beneficial effects:

[0023] The high-precision gear shaft detachable finishing special tooling has a simple overall structure, is convenient to disassemble and assemble with the gear shaft, has low manufacturing cost, can meet the finish machining procedures such as finish machining, outer circle grinding and gear grinding of different gear box gear shafts, has wide application range, and effectively improves the machining efficiency.

[0024] It should be noted that, in this article, unless otherwise specified and limited, the term "connection" or its synonyms should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium, can be internal communication of two elements or interaction relationship of two elements, for those skilled in the art, the specific meaning of the above-mentioned term in the present application can be understood according to the specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. At the same time, the term "includes", "contains" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment. In addition, "front", "back", "left", "right", "up", "down" in this article are referred to the placement state shown in the drawings.

[0025] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A high-precision gear shaft detachable finishing special tool, the finishing special tool is installed on the front and rear two end center holes of the gear shaft, characterized in that, The high-precision gear shaft detachable finishing special tool comprises two connecting pieces, wherein the front end of the connecting piece is provided in the form of an outer hexagonal head, the rear end of the connecting piece is provided in the form of a cylinder, the surface of the connecting piece is provided with external threads, and the middle part of the front end of the connecting piece is provided with a B-type center hole.

2. The high-precision gear shaft detachable finish machining special tooling according to claim 1, characterized in that, The connecting piece is made of 42CrMo material.

3. The high-precision gear shaft detachable finish machining special tooling according to claim 1, characterized in that, The external thread specification is above M30.

4. The high-precision gear shaft detachable finish machining special tooling according to claim 1, characterized in that, The B-type center hole specification is D6.3.

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