Hard alloy extrusion tap

Abstract

The utility model discloses a hard alloy extrusion tap which comprises a tap part and a handle part, the tap part and the handle part are of an integrated structure, oil storage cavities are formed in the tap part and the handle part respectively, the oil storage cavities of the tap part and the handle part are communicated, a first oil injection hole communicated with the oil storage cavities is formed in the handle part, and a second oil injection hole communicated with the oil storage cavities is formed in the handle part. According to the hard alloy extrusion tap, before the extrusion tap works, an injection tool such as an injector is used for injecting lubricating oil into the oil storage cavity through the first oil injection hole, the lubricating oil seeps out through the oil outlet hole under the action of the gravity of the lubricating oil, and when the extrusion tap rotates at a high speed, the lubricating oil can be injected into the oil storage cavity through the first oil injection hole. According to the extrusion tap, the lubricating oil seepage effect is better, the seepage lubricating oil is attached to the threads of the taper part, the good lubricating effect on machining of the taper part is achieved, damage to the threads of the taper part is reduced, and the service life of the extrusion tap is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of extrusion tap application, in particular to a hard alloy extrusion tap. Background Art

[0002] Extrusion tap is a new type of thread tool that uses the principle of metal plastic deformation to process internal threads. Extrusion tap extruding internal threads is a chipless processing technology, which is particularly suitable for copper alloys and aluminum alloys with low strength and good plasticity. It can also be used for tapping materials with low hardness and high plasticity such as stainless steel and low carbon steel, and has a long service life.

[0003] In order to improve the mechanical strength of the existing extrusion taps, they are generally made of cemented carbide. The existing extrusion taps need to be lubricated during the processing to reduce the wear of the taper. However, it is difficult for the lubricating liquid to enter the processing hole during the processing, resulting in poor lubrication effect of the lubricating oil. To this end, we propose a cemented carbide extrusion tap. Utility Model Content

[0004] The purpose of the utility model is to provide a cemented carbide extrusion tap to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cemented carbide extrusion tap, comprising a taper portion and a shank portion, wherein the taper portion and the shank portion are an integrated structure, an oil storage cavity is provided inside the taper portion and the shank portion, and the oil storage cavities of the two are connected, a first oil filling hole connected to the oil storage cavity is provided on the shank portion, and an oil outlet hole connected to the oil storage cavity is provided on the thread gap of the taper portion.

[0006] Preferably, there are a plurality of oil outlet holes, which are evenly distributed on the cone portion.

[0007] Preferably, it also includes a rubber plug, which is used to seal the first oil filling hole.

[0008] Preferably, the diameter of the oil outlet hole is 0.1-1 mm.

[0009] Preferably, the diameter of the first oil filling hole is 2-3 mm.

[0010] Preferably, it also includes a transmission block, a connecting block and a limiting bolt, the side of the transmission block is provided with at least one plane, the end of the handle is provided with a second oil filling hole matching with the side of the transmission block, the second oil filling hole is connected with the oil storage chamber, the transmission block is inserted in the second oil filling hole, the side of the transmission block is provided with a limiting hole, the handle is provided with a threaded hole matching with the limiting bolt, the limiting bolt is threadedly connected with the threaded hole, and its end is inserted in the limiting hole, and one end of the connecting block is fixed to the transmission block.

[0011] Preferably, a plurality of racks are provided on the side surface of the transmission block along the axial direction of the handle, and tooth grooves respectively matched with the plurality of racks are provided on the second oil filling hole.

[0012] Preferably, the diameter of the handle is larger than the diameter of the cone.

[0013] Preferably, chamfers are provided at the corners of the connecting block.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model uses an injection tool such as a syringe to inject lubricating oil into the oil storage cavity through the first oil filling hole before the extruding tap works. The lubricating oil seeps out through the oil outlet hole under the action of its own gravity. When the extruding tap rotates at a high speed, the lubricating oil seeps out better. The seeped lubricating oil adheres to the threads of the cone part, which has a good lubricating effect on the processing of the cone part, reduces the damage of the threads of the cone part, and improves the service life of the extruding tap. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the oil outlet structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the transmission block structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the oil storage chamber structure of the utility model;

[0020] Figure 5 for Figure 2 A magnified image of area A;

[0021] Figure 6 for Figure 4 Enlarged view of area B;

[0022] Figure 7 for Figure 4 Enlarged view of area C.

[0023] In the figure: 1. cone; 2. handle; 3. oil storage chamber; 4. first oil filling hole; 5. oil outlet hole; 6. transmission block; 7. connecting block; 8. limit bolt; 9. second oil filling hole; 10. limit hole; 11. rack; 12. rubber plug. DETAILED DESCRIPTION

[0024] 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.

[0025] Embodiment 1

[0026] See also Figure 1-2 and Figure 4-7 The present embodiment provides a technical solution: a cemented carbide extrusion tap, comprising a cone 1 and a shank 2, wherein the cone 1 and the shank 2 are an integral structure, and an oil storage chamber 3 is provided inside the cone 1 and the shank 2, and the oil storage chambers 3 of the two are connected, and a first oil injection hole 4 connected to the oil storage chamber 3 is provided on the shank 2. Before the extrusion tap works, a syringe or other injection tool is used to inject lubricating oil into the oil storage chamber 3 through the first oil injection hole 4, and the lubricating oil seeps out through the oil outlet 5 under the action of its own gravity, and when the extrusion tap rotates at a high speed, the lubricating oil seeps out better, and the seeped lubricating oil adheres to the thread of the cone 1, which has a good lubricating effect on the processing of the cone 1, reduces the damage to the thread of the cone 1, and improves the service life of the extrusion tap.

[0027] Please refer to Figure 6 In order to increase the lubrication effect on the cone 1, the oil outlet holes 5 are provided in plurality and are evenly distributed on the cone, so that the lubricating oil seeps out of the cone 1 more evenly, further reducing the damage to the thread of the cone 1.

[0028] Please refer to Figure 7 In order to seal the oil outlet hole 5, the present embodiment further includes a rubber plug 12. When the extrusion tap stops processing the workpiece, the first oil filling hole 4 is sealed by the rubber plug 12. Under the action of the negative air pressure inside the oil storage chamber 3, the oil outlet hole 5 stops leaking lubricating oil.

[0029] In order to balance the lateral stress of the cone 1 and enable the oil outlet hole 5 to leak lubricating oil without affecting the strength of the cone 1 , the diameter of the oil outlet hole 5 is 0.1-1 mm, preferably 0.5 mm.

[0030] In order to balance the lateral stress of the handle 2 and enable the first oil injection hole 4 to inject lubricating oil into the oil storage chamber 3 without affecting the strength of the handle 2, the diameter of the first oil injection hole 4 is 2-3 mm, preferably 2.5 mm.

[0031] Embodiment 2

[0032] See also Figure 3-7The difference between this embodiment and the first embodiment is that the technical solution disclosed in this embodiment further includes a transmission block 6, a connecting block 7 and a limiting bolt 8 on the basis of the first embodiment. The end of the handle 2 is provided with a second oil filling hole 9 which matches the side of the transmission block 6. The transmission block 6 is inserted into the second oil filling hole 9. At least one plane is provided on the side of the transmission block 6 so that the transmission block 6 cannot rotate relative to the second oil filling hole 9. One end of the connecting block 7 is fixed to the transmission block 6, and the connecting block 7 is fixed to the driving device, which is used to transmit the driving device to drive the handle 2.

[0033] The second oil filling hole 9 is connected to the oil storage chamber 3 . Since the opening of the second oil filling hole 9 is much larger than the first oil filling hole 4 , an efficient oil filling tool can be used to add lubricating oil into the oil storage chamber 3 through the second oil filling hole 9 .

[0034] Taking into account the cleaning of impurities inside the oil storage chamber 3 , the second oil filling hole 9 is arranged in the axial direction of the tap. The large-diameter second oil filling hole 9 facilitates the cleaning tool to extend into the oil storage chamber 3 .

[0035] Please refer to Figure 7 A limiting hole 10 is provided on the side of the transmission block 6, and the handle 2 is provided with a threaded hole that cooperates with the limiting bolt 8. The limiting bolt 8 is threadedly connected to the threaded hole, and its end is inserted into the limiting hole 10. The transmission block 6 can be fixed relative to the handle 2 through the limiting bolt 8.

[0036] Please refer to Figure 3 In order to make the connection between the transmission block 6 and the handle 2 more stable, a plurality of racks 11 are provided on the side of the transmission block 6 along the axial direction of the handle 2, and a plurality of tooth grooves respectively matched with the plurality of racks 11 are provided on the second oil filling hole 9. Through the cooperation of the plurality of racks 11 and the tooth grooves, the contact area between the transmission block 6 and the handle 2 is increased, and the gap between the transmission block 6 and the handle 2 is avoided to a great extent.

[0037] In order to improve the oil storage capacity of the oil storage chamber 3 , the diameter of the handle 2 is greater than the diameter of the cone 1 .

[0038] Please refer to Figure 3 In order to facilitate the connection between the connecting block 7 and the driving device, chamfers are provided at the corners of the connecting block 7.

[0039] 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.

[0040] 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 cemented carbide extrusion tap, comprising a taper portion (1) and a shank portion (2), wherein the taper portion (1) and the shank portion (2) are an integral structure, characterized in that: The cone (1) and the handle (2) are both provided with an oil storage cavity (3), and the oil storage cavities (3) of the two are connected, the handle (2) is provided with a first oil filling hole (4) connected with the oil storage cavity (3), and the threaded gap of the cone (1) is provided with an oil outlet hole (5) connected with the oil storage cavity (3); It also includes a transmission block (6), a connecting block (7) and a limiting bolt (8), wherein the side of the transmission block (6) is provided with at least one plane, the end of the handle (2) is provided with a second oil filling hole (9) which matches the side of the transmission block (6), the second oil filling hole (9) is communicated with the oil storage chamber (3), the transmission block (6) is inserted into the second oil filling hole (9), the side of the transmission block (6) is provided with a limiting hole (10), the handle (2) is provided with a threaded hole which matches the limiting bolt (8), the limiting bolt (8) is threadedly connected to the threaded hole, and its end is inserted into the limiting hole (10), and one end of the connecting block (7) is fixed to the transmission block (6).

2. A cemented carbide extrusion tap according to claim 1, characterized in that: The oil outlet holes (5) are provided in plurality and are evenly distributed on the cone.

3. The cemented carbide extrusion tap according to claim 1, characterized in that: It also comprises a rubber plug (12), wherein the rubber plug (12) is used to seal the first oil filling hole (4).

4. The cemented carbide extrusion tap according to claim 1, characterized in that: The diameter of the oil outlet hole (5) is 0.1-1 mm.

5. The cemented carbide extrusion tap according to claim 1, characterized in that: The diameter of the first oil injection hole (4) is 2-3 mm.

6. A cemented carbide extrusion tap according to claim 5, characterized in that: The side surface of the transmission block (6) is provided with a plurality of racks (11) along the axial direction of the handle (2), and the second oil filling hole (9) is provided with tooth grooves respectively matching with the plurality of racks (11).

7. A cemented carbide extrusion tap according to claim 6, characterized in that: The diameter of the handle (2) is greater than the diameter of the cone (1).

8. The cemented carbide extrusion tap according to claim 6, characterized in that: The corners of the connecting block (7) are chamfered.

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