Thread tooth cutter grinding head

Abstract

The utility model provides a grinding head of a thread cutter. The grinding head comprises a grinding part and a handle part, a plurality of grinding tooth knives are formed on the grinding part, the grinding tooth knives are sequentially arranged in the extending direction of the grinding part, and the surfaces of the grinding tooth knives are plated with first carborundum layers; the handle part is used for being assembled with a rotary driving assembly. Compared with the prior art, the grinding head of the thread tooth cutter can extend into a bottom hole in a ceramic workpiece to grind the inner wall of the bottom hole, so that complete and smooth standard thread teeth can be stably machined, machining can be carried out according to internal thread characteristics and external thread characteristics, and machining efficiency is improved. And compared with a cutting machining or direct tapping mode, the method is more stable and accurate, the ceramic workpiece is not prone to being damaged, and compared with electric spark machining, the cost is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding processing, in particular to a thread cutter grinding head. Background Art

[0002] Silicon carbide ceramics and zirconia ceramics have high strength and hardness characteristics, and are hard and brittle materials that are difficult to process. For their products, internal thread processing is required. The main processing methods currently include internal thread cutting, EDM or direct tapping.

[0003] Internal thread cutting is a commonly used processing method. The principle is to use PCD forming thread cutters to process internal threads by cutting. It is generally suitable for situations with larger thread diameters. Ceramic sintered materials are easily affected by vibration during the cutting process due to their high hardness and brittleness, making it difficult to ensure processing accuracy, and the cutting surface is prone to cracking and other quality problems.

[0004] Electrospark machining is a novel machining method. Through computer digital control, the voltage is gradually increased to above the discharge point, and the discharge forms a micro air ashing zone, which melts and evaporates the workpiece surface material. This machining method basically has no cutting force, can achieve complex internal thread machining, and the machined surface is smooth and of good quality. However, this method has extremely high requirements for electrodes, and requires the selection of appropriate electrode materials and electrode shapes, and the machining cost is very high.

[0005] Due to the high hardness of ceramics, if a tap is used to directly process the threads of ceramics, it is very easy to cause the tap to wear, and it is impossible to complete the processing of qualified thread teeth. Utility Model Content

[0006] The utility model aims to overcome the shortcomings and deficiencies in the prior art and provide a thread cutter grinding head.

[0007] An embodiment of the utility model provides a thread cutter grinding head, comprising: a grinding portion and a handle portion;

[0008] A plurality of grinding knives are formed on the grinding portion, and the grinding knives are arranged in sequence along the extending direction of the grinding portion, and the surfaces of the grinding knives are plated with a first diamond abrasive layer;

[0009] The handle is used for assembly with a rotary drive assembly.

[0010] In some optional embodiments, a second diamond layer is provided at one end of the grinding portion away from the handle, and the second diamond layer is connected to the first diamond layer.

[0011] In some optional embodiments, the thickness of the diamond layer is greater than or equal to 0.1 mm.

[0012] In some optional embodiments, the number of grinding cutters on the grinding part is 9-15.

[0013] In some optional embodiments, the number of grinding knives on the grinding part is eleven.

[0014] In some optional embodiments, the spacing between adjacent grinding cutters is 1.2-1.8 mm.

[0015] In some optional embodiments, the spacing between adjacent grinding cutters is 1.5 mm.

[0016] In some optional embodiments, the diameter of the handle is larger than the diameter of the grinding portion, a transition section is connected between the handle and the grinding portion, and the diameter of the transition section gradually decreases in a direction approaching the grinding portion.

[0017] In some optional embodiments, an edge of the handle at one end away from the grinding portion is chamfered.

[0018] In some optional embodiments, the handle is a tungsten steel handle, and the grinding part is a tungsten steel grinding part.

[0019] Compared with the prior art, the thread cutter grinding head of the utility model can be inserted into the bottom hole on the ceramic workpiece to grind the inner wall of the bottom hole, thereby stably processing a complete and smooth standard thread. Not only internal thread features but also external thread features can be processed. Compared with cutting or direct tapping, it is more stable and accurate, and is not easy to damage the ceramic workpiece. Compared with electrospark machining, the cost is also lower.

[0020] In order to more clearly understand the present invention, the specific implementation of the present invention will be described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram of a thread cutter grinding head according to an embodiment of the utility model;

[0022] Figure 2 A cross-sectional view of a thread cutter grinding head according to an embodiment of the utility model;

[0023] Figure 3 The present invention is a schematic structural diagram of a thread cutter grinding head and a ceramic workpiece according to an embodiment of the present invention.

[0024] Description of reference numerals:

[0025] 10. Grinding part; 11. Grinding cutter; 12. First diamond layer; 13. Second diamond layer; 20. Handle; 21. Transition section; 22. Chamfer; 30. Ceramic workpiece; 31. Bottom hole. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings 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 making creative work are within the scope of protection of the utility model. In the description of the utility model, unless otherwise specified, "multiple" means 2 or more, and "several" means 1 or more. In addition, unless otherwise specified, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 should not be understood as a limitation on the present invention.

[0028] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the description of this specification, the description with reference to the terms "one embodiment", "some optional implementations" or "some optional embodiments" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0030] See also Figure 1 An embodiment of the utility model provides a thread cutter grinding head, comprising: a grinding portion 10 and a handle portion 20.

[0031] See also Figure 2 A plurality of grinding cutters 11 are formed on the grinding portion 10, and the grinding cutters 11 are arranged in sequence along the extension direction of the grinding portion 10. The surface of the grinding cutters 11 is plated with a first diamond layer 12, which is beneficial to reducing the wear of the grinding cutters 11 and increasing the service life of the thread cutter grinding head. The maintenance cost is low, the processing cost is also low, and it can be mass-produced and used.

[0032] The handle 20 is used to be assembled with the rotary drive assembly. The specific structure of the handle 20 can be designed according to the structural requirements of the actual rotary drive assembly. For example, the rotary drive assembly includes a motor and a connector. The handle 20 is inserted into the connecting hole of the connector. The motor drives the handle 20 to rotate through the connector, thereby driving the thread cutter grinding head to rotate. The rotary drive assembly can be a partial structure of a machine tool.

[0033] See also Figure 3 When processing the internal thread, the ceramic workpiece 30 is first clamped, and then the bottom hole 31 is ground in the ceramic workpiece 30. Then, the thread cutter grinding head is driven to rotate, and the grinding part 10 is extended into the bottom hole 31. The inner wall of the bottom hole 31 is ground in layers to process the required thread features. During the processing, the grinding coolant is used to cool the grinding area.

[0034] In some optional embodiments, the end of the grinding part 10 away from the handle 20 is provided with a second diamond layer 13, and the second diamond layer 13 is connected to the first diamond layer 12. The second diamond layer 13 can prevent the end surface of the grinding part 10 from contacting the bottom of the bottom hole 31 and causing wear.

[0035] In some optional embodiments, the thickness of the corundum layer is greater than or equal to 0.1 mm. For example, the thickness of the corundum layer can be 0.1 mm, 0.15 mm, 0.2 mm, etc. Of course, the thickness of the corundum layer is not limited thereto, and those skilled in the art can also select other suitable thicknesses according to the teachings of the present utility model.

[0036] In order to facilitate the arrangement of the corundum layer, a recessed position is formed on the side of the grinding part 10, and the thread cutter is arranged in the recessed position, so that after the corundum layer is plated on the thread cutter, the diameter corresponding to the bottom of the groove between adjacent thread cutters is the same as the diameter of other parts of the grinding part 10 located in the recessed position, thereby improving the stability of the grinding part 10.

[0037] The number of grinding teeth 11 can be designed according to actual needs. In some optional embodiments, the number of grinding teeth 11 on the grinding part 10 is 9 to 15. For example, in this embodiment, the number of grinding teeth 11 on the grinding part 10 is 11, but this example is not limited.

[0038] The spacing between adjacent grinding teeth cutters 11 can be designed according to actual needs. In some optional embodiments, the spacing between adjacent grinding teeth cutters 11 is 1.2-1.8 mm. For example, in this embodiment, the spacing between adjacent grinding teeth cutters 11 is 1.5 mm, but this example is not limited.

[0039] In some optional embodiments, the diameter of the handle 20 is greater than the diameter of the grinding part 10. The diameter difference between the handle 20 and the grinding part 10 can restrict the handle 20 in the rotary drive assembly when the handle 20 is inserted into the rotary drive assembly. A transition section 21 is connected between the handle 20 and the grinding part 10. The diameter of the transition section 21 gradually decreases in the direction close to the grinding part 10. The transition section 21 can prevent the connection between the handle 20 and the grinding part 10 from being smoother and reduce the friction between the handle 20 and the grinding part 10 and the rotary drive assembly.

[0040] In some optional embodiments, the edge of the handle 20 away from the grinding part 10 is provided with a chamfer 22, so as to reduce the friction between the handle 20 and the rotary drive assembly when the handle 20 is inserted into the rotary drive assembly.

[0041] In some optional embodiments, the handle 20 is a tungsten steel handle 20, and the grinding part 10 is a tungsten steel grinding part 10. The handle 20 and the grinding part 10 are made of tungsten steel material, which has good performance. Tungsten steel has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance, and corrosion resistance. In particular, its high hardness and wear resistance remain basically unchanged even at a temperature of 500°C, and still have a high hardness at 1000°C. Of course, the materials made of the handle 20 and the grinding part 10 are not limited thereto, and those skilled in the art can also select other suitable materials according to the teachings of the utility model.

[0042] 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. A thread cutter grinding head, characterized in that: include: Grinding part and handle; A plurality of grinding knives are formed on the grinding portion, and the grinding knives are arranged in sequence along the extending direction of the grinding portion, and the surfaces of the grinding knives are plated with a first diamond abrasive layer; The handle is used for assembly with a rotary drive assembly.

2. A thread cutter grinding head according to claim 1, characterized in that: A second diamond layer is provided at one end of the grinding portion away from the handle, and the second diamond layer is connected to the first diamond layer.

3. The thread cutter grinding head according to claim 1, characterized in that: The thickness of the diamond sand layer is greater than or equal to 0.1 mm.

4. A thread cutter grinding head according to any one of claims 1 to 3, characterized in that: The number of the grinding cutters on the grinding part is 9-15.

5. A thread cutter grinding head according to claim 4, characterized in that: The number of the grinding cutters on the grinding part is 11.

6. A thread cutter grinding head according to any one of claims 1 to 3, characterized in that: The spacing between adjacent grinding cutters is 1.2-1.8 mm.

7. A thread cutter grinding head according to claim 6, characterized in that: The spacing between adjacent grinding cutters is 1.5 mm.

8. A thread cutter grinding head according to any one of claims 1 to 3, characterized in that: The diameter of the handle is greater than the diameter of the grinding part. A transition section is connected between the handle and the grinding part. The diameter of the transition section gradually decreases in a direction approaching the grinding part.

9. A thread cutter grinding head according to any one of claims 1 to 3, characterized in that: An edge of one end of the handle away from the grinding portion is provided with a chamfer.

10. A thread cutter grinding head according to any one of claims 1 to 3, characterized in that: The handle is a tungsten steel handle, and the grinding part is a tungsten steel grinding part.

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