CN211276835U

CN211276835U - Hard alloy tap

Info

Publication number: CN211276835U
Application number: CN201922103328.7U
Authority: CN
Inventors: 张立新; 刘玉刚
Original assignee: Changchun Fengli Precision Machinery Co ltd
Current assignee: Changchun Fengli Precision Machinery Co ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-08-18
Anticipated expiration: 2029-11-29

Abstract

Hard alloy screw tap relates to processing equipment technical field, has solved the extravagant great problem of current hard alloy helicla flute screw tap to hard alloy material consumption, and the screw tap is the helicla flute screw tap, including the conical head of taper shank and connection taper shank, is equipped with the screw hole on the taper shank, is equipped with the screw thread post on the conical head, spiral chip groove and cutting edge, and the screw thread post corresponds the screw hole setting, and the screw thread post is left-handed thread or is right-handed thread with the cutting edge together, connects the connection of screw thread post realization taper shank and conical head through the screw hole, and taper shank and conical head all adopt hard alloy. The utility model discloses an among the cutting operation, to only conical head damage and the taper shank does not have the condition of damage, need not to abandon whole screw tap, change the conical head and remain the taper shank, only need abandon the conical head, replace new conical head on former taper shank. The utility model discloses reduce the waste of taper shank, reduced carbide material's waste, reduced the volume of the useless piece of industry, reduced carbide's consumption, reduced and consumed social resource.

Description

Hard alloy tap

Technical Field

The utility model relates to a processing equipment technical field, concretely relates to carbide screw tap.

Background

Cemented carbide taps are used to achieve long tool life due to the large amount of cast iron and aluminum alloy parts machined by the automotive industry. Cemented carbide taps have a longer life than high speed steel taps when machining workpieces of these materials. As carbide tools are gradually replacing high speed steel tools in turning, carbide taps are also beginning to be used more for threaded hole machining. The hard alloy spiral fluted tap has higher wear resistance than high-speed steel. The hard alloy spiral fluted tap has good use effect on processing cast iron and aluminum alloy materials, and the damage form of the tap mainly adopts mechanical abrasion. When the hard alloy spiral fluted tap is damaged, the tap is abandoned, and the abandoned tap becomes industrial waste, so that the consumption of the hard alloy used as the manufacturing material of the spiral fluted tap is higher, social resources are consumed, and the sustainable development strategy is not met, and therefore, the consumption of the hard alloy used as the material of the spiral fluted tap is required to be reduced.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a carbide tap.

The utility model discloses a solve the technical scheme that technical problem adopted as follows:

the hard alloy screw tap, the screw tap is the helicla flute screw tap, including the taper shank and the conical head of connecting the taper shank, be equipped with the screw hole on the taper shank, be equipped with screw thread post, spiral chip groove and cutting edge on the taper head, the screw thread post corresponds the screw hole setting, and screw thread post and cutting edge are left-handed screw thread together or are right-handed screw thread together, connect the connection of screw thread post realization taper shank and taper head through the screw hole.

Further, the diameter of the threaded column is 1/2 of the diameter of the taper shank.

Further, the conical head is plated with an amorphous carbon coating.

Furthermore, the conical head is plated with a TiN coating.

Further, the hard alloy is ultra-fine grain hard alloy.

Furthermore, the nominal diameter of the cemented carbide tap is more than or equal to 10mm and less than or equal to 36 mm.

The utility model has the advantages that:

the utility model discloses an among the cutting operation of carbide helicla flute screw tap, to only conical head damage and the circumstances that the taper shank does not have the damage, can adopt the mode that only changes the conical head can, need not to abandon whole screw tap, only need abandon the conical head, replace new conical head on former taper shank. Through the utility model discloses, reduced the waste of taper shank carbide material, the utility model discloses a reduce the volume of the useless piece of industry, reduce carbide's consumption, reduce and consume social resource.

Drawings

Fig. 1 is a schematic view of the overall structure of the cemented carbide tap of the present invention.

Fig. 2 is a schematic view of the hard alloy tap according to the present invention in a disassembled state.

In the figure: 1. taper shank, 2, conical head, 3, screw hole, 4, screw post, 5, spiral chip groove, 6, cutting edge. . .

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

The hard alloy screw tap is a spiral-fluted screw tap and comprises a taper shank 1 and a taper head 2 connected with the taper shank 1, wherein the taper shank 1 and the taper head 2 are both made of hard alloy materials. The taper shank 1 is provided with a threaded hole 3, and the threaded hole 3 is arranged in the center of the end face connected with the taper head 2. Be equipped with screw post 4, spiral chip pocket 5 and cutting edge 6 on the conical head 2, screw post 4 sets up in the center of the terminal surface of being connected with taper shank 1, and screw post 4 corresponds and sets up screw hole 3, and screw post 4 matches screw hole 3, realizes the connection of taper shank 1 and conical head 2 through the threaded connection of screw hole 3 and screw post 4, and the structure chart is as shown in figure 1 and figure 2 respectively with the structure components of a whole that can function independently diagram. The helical flutes 5 and cutting edges 6 are spaced apart. The thread direction of the thread column 4 is the same as that of the cutting edge 6, the thread column 4 and the cutting edge 6 are both left-handed threads or right-handed threads, when the cutting edge 6 of the conical head 2 is used for opening the threads, the friction resistance borne by the conical head 2 enables the thread column 4 and the threaded hole 3 to be in a screwing trend, the direction of the friction resistance is consistent with the screwing direction of the thread column 4 in the threaded hole 3, the thread column 4 and the threaded hole 3 are always kept in a screwing state due to the friction resistance borne by the conical head 2 during opening the threads, and when the tap is screwed out of the opened threads after opening the threads, the resistance borne by the tap is small, so that the thread column 4 and the threaded hole 3 cannot rotate relatively and cannot be loosened; if the thread direction of the threaded column 4 is opposite to that of the cutting edge 6, the problem that the thread becomes looser and even separates when the tap is used for cutting a workpiece to process threads tends to occur.

Wherein the specification of the tap is less than or equal to M36, the tap is usually between M3 and M36, the nominal diameter is between 3mm and 36mm, including 3mm and 36mm, and the nominal diameter is more than or equal to 10mm and less than or equal to 36mm in the embodiment. Wherein, the diameter of the threaded column 4 is 1/2 of the diameter of the taper shank 1. The threads of the threaded hole 3 and the threaded column 4 are both finish machined. The surface of the conical head 2 can be plated with a TiN (titanium nitride) coating by adopting a PVD (physical vapor deposition) coating process, and the method has the advantages of easy production, low cost and wide application range, and can generally improve the service life of the screw tap by about 300 percent; the surface of the conical head 2 can also be plated with an Amorphous Carbon (Amorphous Carbon) coating by adopting a PVD (physical vapor deposition) process, the thickness of the coating is 1-2 mu m, the hardness is about 2500HV, and the method is mainly used for tapping nonferrous metals, aluminum and alloy materials thereof. The number of cutting teeth of the cutting edge 6 may be 2 to 3. The tap is a short type tap. The hard alloy is made of fine grain, submicron grain hard alloy or ultra-fine grain hard alloy, and the ultra-fine grain hard alloy is adopted in the embodiment.

The utility model discloses an among the cutting operation of carbide helicla flute screw tap, to only conical head 2 damage and the condition that taper shank 1 does not have the damage, can adopt only to change conical head 2 the mode can, need not to abandon whole screw tap, only need abandon conical head 2, replace new conical head 2 on former taper shank 1. Through the utility model discloses, reduced the waste of taper shank 1 carbide material, the utility model discloses a reduce the volume of the useless piece of industry, reduce carbide's consumption, reduce and consume social resource.

The foregoing is only a preferred embodiment of the present invention, and the detailed description is not included in the prior art, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The hard alloy screw tap is a spiral flute screw tap, and is characterized by comprising a taper shank (1) and a taper head (2) connected with the taper shank (1), wherein a threaded hole (3) is formed in the taper shank (1), a threaded column (4), a spiral chip groove (5) and a cutting edge (6) are formed in the taper head (2), the threaded column (4) is arranged corresponding to the threaded hole (3), the threaded column (4) and the cutting edge (6) are both left-handed threads or right-handed threads, and the connection of the taper shank (1) and the taper head (2) is realized by connecting the threaded column (4) through the threaded hole (3).

2. The cemented carbide tap according to claim 1, characterized in that the diameter of the threaded shank (4) is 1/2 of the diameter of the tap shank (1).

3. The cemented carbide tap according to claim 1, characterized in that the conical head (2) is coated with amorphous carbon.

4. The cemented carbide tap according to claim 1, characterized in that the conical head (2) is coated with TiN.

5. The cemented carbide tap according to claim 1, wherein the cemented carbide is ultra-fine grain cemented carbide.

6. The cemented carbide tap according to claim 1, wherein the nominal diameter of the cemented carbide tap is 10mm or more and 36mm or less.