Efficient and high-precision indexable gear hob blade

Abstract

The utility model discloses an efficient and high-precision indexable gear hob blade, and relates to a gear machining tool. The problems that a blade has errors in modeling and is low in machining precision are solved. The L side of the indexable hard alloy tooth side blade is processed into an inner concave arc shape, and the R side of the indexable hard alloy tooth side blade is processed into an outer convex arc shape. According to the utility model, the three-dimensional modeling error of the hob is effectively controlled, the pressure angle error of a processed workpiece is improved to more than eight levels, the end face is easy to process, the grinding allowance is small, the cost is low, the processing precision of the hob is improved, the cost performance is very high, and the production cost is low. Not only can new blades be produced, but also the produced and manufactured blades can be transformed and upgraded, and the grinding cost caused by large deviation of gear machining tooth profiles and pressure angles is saved.

Description

Technical Field

[0001] The utility model relates to a gear processing tool, in particular to an efficient and high-precision indexable gear hob blade. Background Art

[0002] At present, the application of high-speed and efficient indexable gear hobs is becoming more and more mature and popular. Therefore, more and more users have higher and higher requirements for the accuracy of such hobs. Grinding hobs and finishing hobs have the same requirements, especially the detection requirements for gear pressure angles. From the design principle of carbide blades, there are modeling errors in their spatial position. Therefore, the original hob design can no longer meet the existing processing requirements. Therefore, it is urgent to develop a new type of hob to meet user requirements. Utility Model Content

[0003] In order to solve the problem that the traditional indexable hob blade has errors in shape and low processing accuracy, and cannot meet the high-precision processing requirements of users, the utility model provides an efficient and high-precision indexable gear hob blade. The specific technical solution to solve the problem is as follows:

[0004] The utility model discloses an efficient and high-precision indexable gear hob blade. The L side of the indexable carbide tooth side blade is designed to be an inner concave arc shape, and the R side of the indexable carbide tooth side blade is designed to be an outer convex arc shape.

[0005] The utility model discloses an efficient and high-precision indexable gear hob blade. After designing a three-dimensional model, it is known that the existing blade has a tooth profile error in the modeling. The tooth profile deviation of the gear tooth surface processed in this way is concave on one side and convex on the other side when the pressure angle deviation is qualified, and the values ​​of the concave and convex will increase with the increase of the module. Therefore, it is necessary to improve the blade to compensate for this error. The L side of the indexable carbide tooth side blade is processed into an inner concave arc shape, and the R side of the indexable carbide tooth side blade is processed into an outer convex arc shape. In this way, the three-dimensional modeling error of the hob can be reduced. It is effectively controlled, the theoretical modeling error of the cutting edge of the indexable gear hob blade is 0, and the tooth profile error of the workpiece being processed is increased to more than 8 levels. Moreover, this improvement method is set on the blade thickness, which makes processing very easy, with small processing allowance, short processing cycle, less grinding wheel wear, etc. It is easy to improve the processing accuracy of the indexable gear hob, and the cost performance is very high. Not only can new indexable gear hob blades be produced, but also the blades of the indexable gear hobs that have been manufactured can be modified and upgraded, saving the grinding cost caused by large deviations in gear processing tooth profile and pressure angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 This is the front view of the utility model. Figure 2 yes Figure 1 A top view of Figure 3 yes Figure 1 Bottom view of Figure 4 yes Figure 1 3D view of the concave edge. Figure 5 yes Figure 4 The opposite convex 3D view, Figure 6 This is the front view of the indexable gear hob assembly. Figure 7 yes Figure 6 The left view of Figure 8 It is the normal tooth profile diagram of the indexable gear hob. DETAILED DESCRIPTION

[0007] Specific implementation method 1: Combination Figures 1 to 8 This embodiment is described as follows. In this embodiment, the indexable carbide tooth side blade 2 of the existing indexable gear hob is processed into an inner concave arc shape on the L side of the indexable carbide tooth side blade 2 and into an outer convex arc shape on the R side of the indexable carbide tooth side blade 2.

[0008] Specific implementation method 2: Combination Figure 1 , Figure 4 and Figure 5 The present embodiment is described as follows: The width b1 of the outer convex arc processing of the indexable cemented carbide tooth side insert 2 described in the present embodiment is less than or equal to 3 mm, and the width b2 of the inner concave arc processing is less than or equal to 3 mm.

[0009] Specific implementation method three: Combination Figures 2 to 5 The present embodiment is described as follows: The depth h1 of the outer convex arc processing and the depth h2 of the inner concave arc processing of the indexable cemented carbide tooth side insert 2 described in the present embodiment are less than or equal to 0.2 mm.

[0010] Specific implementation method four: Combination Figure 1 , Figure 6 and Figure 7 The present embodiment is described as follows: The indexable carbide tooth side inserts 2 described in the present embodiment are arranged oppositely on both sides of the indexable gear hob.

[0011] Specific implementation method five: Combination Figure 3 The indexable carbide insert 2 described in this embodiment can not only produce new inserts, but also be suitable for processing and modifying existing inserts that have been manufactured to make them into efficient and high-precision indexable gear hob inserts.

[0012] The above embodiments are merely illustrative and do not limit the present invention. It should be pointed out that for those skilled in the art, other equivalent changes, modifications, substitutions and variations made under the inspiration of the technical solution provided by the present invention should all be regarded as within the protection scope of the present invention.

Claims

1. A high-efficiency and high-precision indexable gear hob blade, characterized by: The L side of the indexable cemented carbide tooth side insert is designed to be in an inner concave arc shape, and the R side of the indexable cemented carbide tooth side insert is designed to be in an outer convex arc shape.

2. The high-efficiency and high-precision indexable gear hob blade according to claim 1, characterized in that: The depth b2 of the inner concave arc of the indexable carbide tooth side insert L is less than or equal to 3 mm.

3. The high-efficiency and high-precision indexable gear hob blade according to claim 1, characterized in that: The width b1 of the outer convex arc on the R side of the indexable cemented carbide tooth side insert is less than or equal to 3 mm.

4. The high-efficiency and high-precision indexable gear hob blade according to claim 1, characterized in that: The inner concave arc depth h2 of the indexable cemented carbide tooth side insert is less than or equal to 0.2 mm.

5. The high-efficiency and high-precision indexable gear hob blade according to claim 1, characterized in that: The outer convex arc depth h1 of the indexable cemented carbide tooth side insert is less than or equal to 0.2 mm.

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