Grinding hook knife for inner end face of gear workpiece

Abstract

The utility model relates to the technical field of numerical control tools, and discloses a gear workpiece inner end face grinding hook knife which comprises a knife handle, a knife holder is arranged at the left end of the knife handle, the knife holder is in an L shape, a blade clamping groove is formed in the corner of the front side of the top of the knife holder, a blade is connected into the blade clamping groove in a clamped mode, and the blade clamping groove is connected with the knife handle in a clamped mode. And the blade is made of a CBN material. According to the gear workpiece inner end face grinding hook knife, the knife holder is designed to be L-shaped, and the blade is fixed to the corner position of the knife holder, so that after the outer end face and the inner hole of the workpiece are machined, the workpiece does not need to be turned over, the hook knife can penetrate into the inner end face of the workpiece from the inner hole, the inner end face is directly machined reversely, operation steps are simplified, and machining efficiency is improved. In addition, the blade is made of CBN materials, the hardness is high, grinding can be replaced by turning, and especially for workpieces which are not convenient to conduct conventional grinding operation due to the fact that the concave portion of the inner end face is lower than the outer edge.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control tools, in particular to a hook tool for grinding the inner end surface of a gear workpiece. Background Art

[0002] CNC tools are tools used for cutting in mechanical manufacturing, also known as cutting tools. In a broad sense, cutting tools include both cutting tools and grinding tools. At the same time, "CNC tools" include not only cutting blades, but also accessories such as tool bars and tool holders. When machining gear workpieces, it is necessary to turn the inner hole, outer end face and inner end face, so there are strict requirements for tools.

[0003] When processing a gear workpiece, common tools need to fix the workpiece first, and then use a turning tool to turn the outer end face and inner hole. Because the conventional turning tool is a straight tool, it is impossible to directly process the inner end face. After the outer end face and inner hole processing are completed, the workpiece needs to be turned over and re-clamped before turning the inner end face. The process is cumbersome, and repeated clamping makes it difficult to ensure positioning accuracy, which cannot meet the working requirements of CNC tools. Therefore, a gear workpiece inner end face grinding hook tool is proposed. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a gear workpiece inner end surface grinding hook cutter to solve the above technical problems.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: a gear workpiece inner end surface grinding hook cutter, comprising:

[0008] The tool handle has a tool seat at its left end, the tool seat is L-shaped, a blade slot is provided at the top front corner of the tool seat, a blade is clamped inside the blade slot, and the blade is made of CBN material.

[0009] Preferably, a guide groove is provided in the middle position inside the tool handle, and the left end of the guide groove passes through the corresponding position of the tool handle. The guide groove can directly guide the incoming coolant to the surface of the tool seat, so that the tool seat and the blade can be cooled by the coolant when they are extended into the inner hole of the gear.

[0010] Preferably, a main flow groove is opened on the front side of the top of the tool holder, and a secondary flow groove is opened on the left side of the top of the tool holder. Heat dissipation grooves are opened on the inner sides of the main flow groove and the secondary flow groove. The main flow groove and the secondary flow groove not only facilitate chip removal, but also improve the heat dissipation speed of the tool holder.

[0011] Preferably, a chip breaker groove is provided in the middle position of the top of the blade, cooling grooves are provided on the left and right sides of the top of the blade, and chip breaking bumps are installed on the front and back sides of the top of the blade, which improves the quality of chip removal and chip breaking during processing, avoids the accumulation of metal chips at the tip of the tool, prevents metal chips from affecting the surface finish of the workpiece being processed, and can cooperate with rapid heat dissipation to avoid heat accumulation at the tip of the tool.

[0012] (III) Beneficial effects

[0013] Compared with the prior art, the utility model provides a gear workpiece inner end surface grinding hook cutter, which has the following beneficial effects:

[0014] The inner end face grinding hook cutter of the gear workpiece is designed with an L-shaped cutter holder and the blade is fixed at the corner position of the cutter holder. After the outer end face and inner hole of the workpiece are processed, there is no need to flip the workpiece. The hook cutter can penetrate from the inner hole position to the inner end face position of the workpiece and directly reversely process the inner end face, which simplifies the operation steps and avoids the influence of repeated clamping on the accuracy. Moreover, since the cutter is made of CBN material with high hardness, turning can be used instead of grinding, especially for the workpiece whose inner end face is concave lower than the outer edge and is not convenient for conventional grinding operation, so the gear workpiece can be clamped once to complete multi-angle turning and grinding operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the knife holder of the utility model;

[0017] Figure 3 This is a schematic diagram of the blade structure of the utility model.

[0018] In the figure: 1. tool handle; 2. tool seat; 3. guide groove; 4. blade slot; 5. blade; 6. main flow groove; 7. secondary flow groove; 8. heat dissipation groove; 9. chip breaker groove; 10. chip breaking protrusion; 11. cooling groove. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] The utility model provides a technical solution, a gear workpiece inner end surface grinding hook cutter, comprising a cutter handle 1, a cutter seat 2, a guide groove 3, a blade slot 4, a blade 5, a main flow groove 6, a secondary flow groove 7, a heat dissipation groove 8, a chip breaker groove 9, a chip breaker convex point 10 and a cooling groove 11:

[0021] See also Figure 1 The left end of the handle 1 is provided with a knife seat 2, which is L-shaped. Figure 2 A blade slot 4 is provided at the top front corner of the blade holder 2, see Figure 1 The blade 5 is clamped inside the blade slot 4, and the blade 5 is made of CBN material. By designing the tool holder 2 into an L shape, the blade 5 is fixed at the corner position of the tool holder 2, so that after the outer end face and the inner hole of the workpiece are processed, there is no need to flip the workpiece. The hook tool can penetrate from the inner hole position to the inner end face position of the workpiece, and directly reversely process the inner end face, which simplifies the operation steps and avoids the influence of repeated clamping on the accuracy. In addition, since the blade 5 is made of CBN material and has a high hardness, it can be realized by turning instead of grinding, especially for workpieces whose inner end face is concave below the outer edge and is not convenient for conventional grinding operations, so that the gear workpiece can be clamped once to complete multi-angle turning and grinding operations. A guide groove 3 is opened in the middle position of the inner side of the tool holder 1, and the left end of the guide groove 3 passes through the corresponding position of the tool holder 1. The opened guide groove 3 can directly guide the introduced coolant to the surface of the tool holder 2, so that when the tool holder 2 and the blade 5 extend into the inner hole of the gear, they can be cooled by the coolant. Please refer to Figure 2 A main flow groove 6 is provided on the front side of the top of the tool holder 2, and a secondary flow groove 7 is provided on the left side of the top of the tool holder 2. Heat dissipation grooves 8 are provided on the inner sides of the main flow groove 6 and the secondary flow groove 7. The main flow groove 6 and the secondary flow groove 7 not only facilitate chip removal, but also improve the heat dissipation speed of the tool holder 2. Please refer to Figure 3 A chip breaker groove 9 is provided in the middle of the top of the blade 5, cooling grooves 11 are provided on the left and right sides of the top of the blade 5, and chip breaking bumps 10 are installed on the front and back sides of the top of the blade 5, which improves the quality of chip removal and chip breaking during processing, avoids the accumulation of metal chips at the tip of the tool, prevents the metal chips from affecting the surface finish of the workpiece being processed, and can also cooperate with rapid heat dissipation to avoid heat accumulation at the tip of the tool.

[0022] In this solution, the tool holder 2 is designed to be L-shaped, and the blade 5 is fixed at the corner position of the tool holder 2. Therefore, after the outer end face and inner hole of the workpiece are processed, there is no need to flip the workpiece. The hook cutter can penetrate from the inner hole position to the inner end face position of the workpiece and directly reversely process the inner end face, which simplifies the operation steps and avoids the influence of repeated clamping on the accuracy. Moreover, since the blade 5 is made of CBN material with high hardness, turning can be used instead of grinding, especially for workpieces whose inner end face is recessed below the outer edge and is not convenient for conventional grinding operations, so that the gear workpiece can be clamped once and multi-angle turning and grinding operations can be completed.

[0023] It should be noted that, in this article, relational terms such as first and second, etc. 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 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 including 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.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Gear workpiece inner end surface grinding hook cutter, characterized in that: include: A knife handle (1), wherein a knife seat (2) is mounted on the left end of the knife handle (1), wherein the knife seat (2) is L-shaped, and a blade slot (4) is provided at the top front corner of the knife seat (2), wherein a blade (5) is clamped inside the blade slot (4), and wherein the blade (5) is made of CBN material.

2. The gear workpiece inner end surface grinding hook cutter according to claim 1, characterized in that: A guide groove (3) is provided at a middle position inside the knife handle (1), and a left end of the guide groove (3) passes through a corresponding position of the knife handle (1).

3. The gear workpiece inner end surface grinding hook cutter according to claim 1, characterized in that: A main flow groove (6) is provided on the front side of the top of the knife seat (2), a secondary flow groove (7) is provided on the left side of the top of the knife seat (2), and heat dissipation grooves (8) are provided on the inner sides of the main flow groove (6) and the secondary flow groove (7).

4. The gear workpiece inner end surface grinding hook cutter according to claim 1, characterized in that: A chip breaker groove (9) is provided at the middle position of the top of the blade (5), cooling grooves (11) are provided on both the left and right sides of the top of the blade (5), and chip breaker protrusions (10) are provided on both the front and rear sides of the top of the blade (5).

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