Method for processing a cutter arbor sleeve of a gear shaping machine and cutter arbor sleeve of a gear shaping machine

Abstract

A method for machining a gear shaper cutter shaft sleeve and the cutter shaft sleeve itself include the following steps: aligning the cutter shaft sleeve blank with its outer diameter and end face; turning the dimensions of the left and right end faces, the inner hole at the right end, and the tapered hole at the left end of the blank, leaving machining allowance; aligning the outer diameter and end face of the cutter shaft sleeve blank; turning the dimensions of the left and right end faces, the inner hole at the right end, and the tapered hole at the left end of the blank, leaving finishing allowance; clamping the outer diameter of the right end of the cutter shaft sleeve on a precision machine tool; aligning the outer diameter and end face of the cutter shaft sleeve blank; precision grinding the tapered hole at the left end of the cutter shaft sleeve blank; installing and aligning a soft grinding sleeve on a grinding machine; then inserting the left end of the mandrel into the inner positioning hole of the soft grinding sleeve; then inserting the cutter shaft sleeve into the right end of the mandrel, completing the assembly of the cutter shaft sleeve before precision grinding; and finally precision grinding the inner hole at the right end of the cutter shaft sleeve using a grinding machine. This invention effectively reduces the reference conversion error caused by multiple clamping by using a high-precision mandrel as a unified process reference and optimizing the processing sequence.

Description

Technical Field

[0001] This invention relates to the field of tool shaft sleeve technology, and in particular to a method for processing a tool shaft sleeve for a gear shaper and a tool shaft sleeve for a gear shaper. Background Technology

[0002] The cutter shaft sleeve is a core component in gear shaping machines, connecting the spindle and the cutting tool. Its machining accuracy requirements are high, especially the coaxiality of the left-end tapered hole and the right-end straight hole, which directly determines the final positioning accuracy of the cutting tool and the quality of the gear shaping. Currently, traditional machining processes involve left-right reversal during grinding, requiring the part to be clamped twice. Inconsistent machining datums or frequent changes lead to the accumulation and amplification of errors during multiple clamping and machining processes. This results in a significant coaxiality error in the cutter shaft sleeve, making it difficult to meet usage requirements. Insufficient precision in this critical connecting component directly causes excessive positioning errors and runout between the tool mounted on it and the machine tool spindle. This error is then transmitted to the machined gear, causing a decrease in gear machining accuracy and severely impacting product quality. Existing methods lack systematic control over critical dimensions and geometric tolerances, relying on operator experience, leading to poor accuracy stability across different batches and even within the same batch of parts, thus requiring improvement in product qualification rates. Summary of the Invention

[0003] In order to solve the technical problems existing in the above-mentioned technology, it is necessary to provide a method for machining the cutter shaft sleeve of a gear shaper.

[0004] A method for machining a gear shaper cutter shaft sleeve includes the following steps:

[0005] Step S1: Rough machining of the tapered hole and inner hole of the tool shaft sleeve.

[0006] Align the outer diameter and end face of the tool shaft sleeve blank, turn the right end face dimension and the inner hole of the right end of the tool shaft sleeve blank, and leave machining allowance;

[0007] Turn the clamped tool shaft sleeve blank around, align it according to the outer circle and end face of the tool shaft sleeve blank, turn the left end face dimension of the tool shaft sleeve blank and the tapered hole at the left end, leaving machining allowance;

[0008] Step S2: Semi-finishing of the tapered hole and inner hole of the tool shaft coupling.

[0009] Align the outer diameter and end face of the tool shaft sleeve blank, turn the dimensions of the right end face of the tool shaft sleeve blank and the inner hole of the right end, and reserve finishing allowance;

[0010] Turn the clamped tool shaft sleeve blank around, align the outer circle and end face of the tool shaft sleeve blank, turn the left end face dimension of the tool shaft sleeve blank and the tapered hole at the left end, and leave a finishing allowance;

[0011] Step S3: Finish machining of the tapered hole of the tool shaft coupling

[0012] Clamp the outer circle of the right end of the tool shaft sleeve on the precision machine tool, align the outer circle and end face of the tool shaft sleeve blank, and finely grind the tapered hole at the left end of the tool shaft sleeve blank to ensure that the dimensions and surface roughness meet the design requirements.

[0013] Step S4: Assemble the cutter shaft sleeve

[0014] Insert the soft grinding sleeve into the grinding machine and align it. Then, insert the left end of the mandrel into the inner positioning hole of the soft grinding sleeve, and then insert the cutter shaft connector into the right end of the mandrel to complete the assembly of the cutter shaft connector before fine grinding.

[0015] Step S5: Finish machining of the inner hole of the tool shaft coupling

[0016] The inner hole at the right end of the tool spindle sleeve is precision ground using a grinding machine to ensure that the dimensions and surface roughness meet the design requirements.

[0017] Preferably, in step S1, a machining allowance of 3-4 mm is reserved.

[0018] Preferably, in step S2, a finishing allowance of 0.5 mm is reserved.

[0019] Preferably, the roughness of the tapered hole of the cutter shaft sleeve is 0.8 μm.

[0020] Preferably, the roughness of the inner hole of the cutter shaft sleeve is 0.8 μm.

[0021] Preferably, in step S4, after the grinding machine clamps the soft grinding sleeve, the inner positioning hole of the soft grinding sleeve needs to be ground.

[0022] Preferably, the right end of the mandrel has a first positioning cone that matches the tapered hole of the cutter shaft sleeve, and the left end of the mandrel has a second positioning cone that matches the inner positioning hole of the soft grinding sleeve.

[0023] Preferably, there is a positioning frustum with a diameter larger than that of the first positioning cone between the first positioning cone and the second positioning cone.

[0024] Preferably, the inner positioning hole of the soft abrasive sleeve is a Morse taper hole.

[0025] Also, do not provide a gear shaper cutter shaft connector sleeve.

[0026] A gear shaper cutter shaft sleeve is manufactured using the gear shaper cutter shaft sleeve processing method described above.

[0027] Compared with existing technologies, the gear shaper cutter shaft sleeve processing method and the gear shaper cutter shaft sleeve provided by this invention rely on a tooling consisting of a soft-grinding sleeve and a mandrel to assist in the manufacturing and processing of the cutter shaft sleeve. By using a high-precision mandrel as a unified process reference and optimizing the processing sequence (such as using the precision-machined Morse taper hole as a reference for subsequent processing), the reference conversion error caused by multiple clamping is effectively reduced. The coaxiality accuracy is improved from the original (0.02-0.06) mm to (0.003-0.008) mm. By systematically controlling key dimensions and geometric tolerances, the reliance on operator experience is reduced, and the reliability and repeatability of the process are improved. The improved accuracy of the processed cutter shaft sleeve directly reduces the positioning error and runout between the tool and the machine tool spindle, thereby avoiding the transmission of error to the machined gear and improving the overall manufacturing accuracy of the gear shaper. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of the mandrel, grinding sleeve, and cutter shaft connector after assembly according to the present invention.

[0030] Figure 2 For the present invention Figure 1 A cross-sectional structural diagram.

[0031] Figure 3 This is a schematic diagram of the mandrel structure of the present invention.

[0032] Figure 4 This is a schematic diagram of the structure of the soft abrasive sleeve of the present invention.

[0033] In the figure: Soft grinding sleeve 01, inner positioning hole 11, mandrel 02, first positioning cone 21, second positioning cone 22, positioning frustum 23, cutter shaft connecting sleeve 03. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] In the description of this invention, it should be understood that the terms "upper", "middle", "outer", "inner", "lower", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0036] Please refer to Figures 1 to 4 This invention provides a method for machining a gear shaper cutter shaft sleeve, comprising the following steps:

[0037] Step S1: Rough machining of the tapered hole and inner hole of the tool shaft sleeve.

[0038] Align the outer diameter and end face of the tool shaft sleeve blank, turn the right end face dimension and the inner hole of the right end of the tool shaft sleeve blank, and leave machining allowance;

[0039] Turn the tool shaft sleeve blank around and align it according to the outer diameter and end face of the tool shaft sleeve blank. Turn the left end face dimension of the tool shaft sleeve blank and the tapered hole at the left end, leaving machining allowance. The tapered hole at the left end of the tool shaft sleeve is a Morse taper hole.

[0040] Step S2: Semi-finishing of the tapered hole and inner hole of the tool shaft coupling.

[0041] Align the outer diameter and end face of the tool shaft sleeve blank, turn the dimensions of the right end face of the tool shaft sleeve blank and the inner hole of the right end, and reserve finishing allowance;

[0042] Turn the clamped tool shaft sleeve blank around, align the outer circle and end face of the tool shaft sleeve blank, turn the left end face dimension of the tool shaft sleeve blank and the tapered hole at the left end, and leave a finishing allowance;

[0043] Step S3: Finish machining of the tapered hole of the tool shaft coupling

[0044] Clamp the outer circle of the right end of the tool shaft sleeve on the precision machine tool, align the outer circle and end face of the tool shaft sleeve blank, and finely grind the tapered hole at the left end of the tool shaft sleeve blank to ensure that the dimensions and surface roughness meet the design requirements.

[0045] Step S4: Assemble the cutter shaft sleeve

[0046] Install the soft grinding sleeve 01 into the grinding machine and align it. Then, insert the left end of the mandrel 02 into the inner positioning hole 11 of the soft grinding sleeve 01, and then insert the tool shaft connector into the right end of the mandrel 02, completing the assembly of the tool shaft connector before fine grinding. By using this method, the Morse taper hole of the already finely machined tool shaft connector can be used as the positioning reference to fine grind the inner hole of the other end of the tool shaft connector. Since a high-precision inner taper hole is used as a unified reference at this time, the reference conversion error can be minimized, ensuring that the coaxiality between the straight hole at the right end and the Morse taper hole at the left end reaches the highest requirement.

[0047] Step S5: Finish machining of the inner hole of the tool shaft coupling

[0048] By using a grinding machine to finely grind the inner hole at the right end of the tool spindle sleeve, the center of the Morse taper hole at the left end and the center of the inner hole at the right end are kept highly coincident, ensuring that the dimensions and surface roughness meet the design requirements.

[0049] In step S1, a machining allowance of 3-4 mm is reserved.

[0050] In step S2, a finishing allowance of 0.5 mm is reserved.

[0051] The roughness of the tapered hole of the cutter shaft sleeve is 0.8 μm.

[0052] The inner hole roughness of the cutter shaft sleeve is 0.8 μm.

[0053] In step S4, after the grinding machine clamps the soft grinding sleeve 01, the inner positioning hole 11 of the soft grinding sleeve 01 needs to be re-ground. Generally, grinding is sufficient until a new metallic luster is visible to ensure accurate coaxiality. This soft grinding sleeve 01 can be used for mandrels 02 of various specifications. It is a consumable part and only needs to be replaced if damaged.

[0054] The right end of the mandrel 02 has a first positioning cone 21 that matches the tapered hole of the cutter shaft sleeve, and the left end of the mandrel 02 has a second positioning cone 22 that matches the inner positioning hole 11 of the soft grinding sleeve 01.

[0055] Specifically, there is a positioning frustum 23 with a diameter larger than that of the first positioning cone 21 between the first positioning cone 21 and the second positioning cone 22.

[0056] Among them, the inner positioning hole 11 of the soft grinding sleeve 01 is a Morse taper hole.

[0057] For mandrel 02, as a high-precision process reference, a high-precision conical surface must be used as the positioning surface. This mandrel 02 itself needs to be precision ground in one go by clamping with two centers. The roundness, taper and coaxiality of its key surfaces should be much higher than the final precision requirements of the tool shaft sleeve, so as to provide a reliable reference for subsequent processes.

[0058] For the soft grinding sleeve 01, the outer diameter and Morse taper hole are first machined on a lathe. Note that a fine grinding allowance should be left for the Morse taper hole. Afterwards, it is precision ground on a precision grinder to ensure that its dimensions and surface roughness meet design requirements. Once the Morse taper hole of the soft grinding sleeve 01 is machined, it is crucial not to disassemble it. The high-precision mandrel 02 is directly inserted into the taper hole. This establishes the Morse taper hole of the tool shaft connector as the reference for subsequent machining steps, fundamentally ensuring extremely high coaxiality between the taper hole of the soft grinding sleeve 01 and the Morse taper hole of the tool shaft connector. After a batch of workpieces is machined, the soft grinding sleeve 01 needs to be disassembled and protected against rust. When used again, after clamping the soft grinding sleeve 01 on the machine tool, the Morse taper hole needs to be lightly ground to ensure accurate coaxiality.

[0059] A gear shaper cutter shaft sleeve is manufactured using the gear shaper cutter shaft sleeve processing method.

[0060] The above description discloses only preferred embodiments of the present invention and should not be construed as limiting the scope of the invention. Those skilled in the art will understand that implementing all or part of the above embodiments and making equivalent changes in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A method for machining a gear shaper cutter shaft sleeve, characterized in that: Includes the following steps, Step S1: Rough machining of the tapered hole and inner hole of the tool shaft sleeve. Align the outer diameter and end face of the tool shaft sleeve blank, turn the right end face dimension and the inner hole of the right end of the tool shaft sleeve blank, and leave machining allowance; Turn the clamped tool shaft sleeve blank around, align it according to the outer circle and end face of the tool shaft sleeve blank, turn the left end face dimension of the tool shaft sleeve blank and the tapered hole at the left end, leaving machining allowance; Step S2: Semi-finishing of the tapered hole and inner hole of the tool shaft coupling. Align the outer diameter and end face of the tool shaft sleeve blank, turn the dimensions of the right end face of the tool shaft sleeve blank and the inner hole of the right end, and reserve finishing allowance; Turn the clamped tool shaft sleeve blank around, align the outer circle and end face of the tool shaft sleeve blank, turn the left end face dimension of the tool shaft sleeve blank and the tapered hole at the left end, and leave a finishing allowance; Step S3: Finish machining of the tapered hole of the tool shaft coupling Clamp the outer circle of the right end of the tool shaft sleeve on the precision machine tool, align the outer circle and end face of the tool shaft sleeve blank, and finely grind the tapered hole at the left end of the tool shaft sleeve blank to ensure that the dimensions and surface roughness meet the design requirements. Step S4: Assemble the cutter shaft sleeve Insert the soft grinding sleeve into the grinding machine and align it. Then, insert the left end of the mandrel into the inner positioning hole of the soft grinding sleeve, and then insert the cutter shaft connector into the right end of the mandrel to complete the assembly of the cutter shaft connector before fine grinding. Step S5: Finish machining of the inner hole of the tool shaft coupling The inner hole at the right end of the tool spindle sleeve is precision ground using a grinding machine to ensure that the dimensions and surface roughness meet the design requirements.

2. The method for machining the cutter shaft sleeve of a gear shaper according to claim 1, characterized in that: In step S1, a machining allowance of 3-4 mm is reserved.

3. The method for machining the cutter shaft sleeve of a gear shaper according to claim 2, characterized in that: In step S2, a finishing allowance of 0.5 mm is reserved.

4. The method for machining the cutter shaft sleeve of a gear shaper according to claim 3, characterized in that: The roughness of the tapered hole of the cutter shaft sleeve is 0.8 μm.

5. The method for machining the cutter shaft sleeve of a gear shaper according to claim 4, characterized in that: The inner bore roughness of the cutter shaft sleeve is 0.8 μm.

6. The method for machining the cutter shaft sleeve of a gear shaper according to claim 1, characterized in that: In step S4, after the grinding machine clamps the soft grinding sleeve, the inner positioning hole of the soft grinding sleeve needs to be ground.

7. The method for machining the cutter shaft sleeve of a gear shaper according to claim 1, characterized in that: The right end of the mandrel has a first positioning cone that matches the tapered hole of the cutter shaft sleeve, and the left end of the mandrel has a second positioning cone that matches the inner positioning hole of the soft grinding sleeve.

8. The method for machining the cutter shaft sleeve of a gear shaper according to claim 7, characterized in that: There is a positioning frustum with a diameter larger than that of the first positioning cone between the first positioning cone and the second positioning cone.

9. The method for machining the cutter shaft sleeve of a gear shaper according to claim 7, characterized in that: The inner positioning hole of the soft abrasive sleeve is a Morse taper hole.

10. A gear shaper cutter shaft sleeve, manufactured using the gear shaper cutter shaft sleeve processing method according to any one of claims 1-9.

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