Special screw tap for ductile iron

Abstract

The utility model belongs to the technical field of screw taps, and particularly relates to a special screw tap for ductile iron, which comprises a screw tap body consisting of a tap body, a neck, a round handle and a driving square head. The cone is connected with the neck part, the neck part is connected with the round handle, and the round handle is connected with the driving square head; a chip groove is formed between the cone and the neck part, a cutting edge is formed on the cone, a clearance is formed on the cutting edge, and meanwhile, a chamfer is formed at the front end of the cutting edge. Cutting force is evenly distributed, machining stability and precision are improved, the inner cooling water outlet hole is matched with the thick core portion, the cutting temperature is effectively reduced, abrasion and deformation of the screw tap are reduced, the service life is prolonged, the chip removal effect is optimized through the four circumferentially-distributed blades, scrap iron accumulation is avoided, the overall design is specially designed for nodular cast iron machining, and the service life is prolonged. And the thread machining task can be efficiently completed with high quality.

Description

Technical Field

[0001] The utility model relates to the technical field of taps, in particular to a special tap for ductile iron. Background Art

[0002] In the field of mechanical processing, a tap is a tool used to produce internal threads. However, when it comes to processing materials such as ductile iron, traditional taps often have some shortcomings.

[0003] Ductile iron has high strength and hardness, which easily generates significant cutting forces and heat during machining. This places higher demands on the strength, cutting performance, and chip evacuation capabilities of the tap. Traditional taps can experience rapid wear, edge breakage, and poor chip evacuation when machining ductile iron, impacting machining efficiency and thread quality.

[0004] In order to solve these problems, a special tap for ductile iron came into being. Utility Model Content

[0005] (1) Technical problems solved

[0006] In view of the deficiencies in the prior art, the present invention provides a special tap for ductile iron, which solves the problems raised in the above-mentioned background technology.

[0007] (2) Technical solution

[0008] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0009] A special tap for ductile iron, comprising a tap body, wherein the tap body is composed of a cone, a neck, a round handle and a driving square head;

[0010] The cone is connected to the neck, the neck is connected to the round handle, and the round handle is connected to the driving square head;

[0011] A chip removal groove is formed between the cone and the neck, a cutting edge is formed on the cone, a clearance is provided on the cutting edge, and a chamfer is formed at the front end of the cutting edge.

[0012] Furthermore, the middle portion of the cone is the core, and the core is hollow and provided with an inner cooling water outlet hole.

[0013] Furthermore, the cutting edge, the clearance and the chamfer on the core form a cutting edge.

[0014] Furthermore, the blade is divided into four and distributed around the circumference.

[0015] Furthermore, the core thickness reaches 60% of the overall diameter, and combined with the use of internal cooling holes, the tap body exhibits higher strength and good chip removal effect in ductile iron machining.

[0016] (3) Beneficial effects

[0017] Compared with the prior art, the present invention provides a special tap for ductile iron, which has the following beneficial effects:

[0018] This utility model evenly distributes the cutting force, improves the processing stability and precision, and the internal cooling water outlet hole combined with the thicker core effectively reduces the cutting temperature, reduces the wear and deformation of the tap, and extends the service life. The four circumferentially distributed cutting petals optimize the chip removal effect and avoid iron chip accumulation. The overall design is specially designed for ductile iron processing and can complete thread processing tasks efficiently and with high quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the test structure of the utility model.

[0021] In the figure: 1. Cone; 2. Neck; 3. Round shank; 4. Driving square head; 5. Chip groove; 6. Air avoidance; 7. Chamfer; 8. Cutting edge; 9. Core; 10. Internal coolant outlet hole; 11. Blade. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example

[0024] like Figure 1-2 As shown, a special tap for ductile iron provided by one embodiment of the present invention includes a tap body, wherein the tap body is composed of a cone 1, a neck 2, a round handle 3 and a driving square head 4;

[0025] The cone 1 is connected to the neck 2, the neck 2 is connected to the round handle 3, and the round handle 3 is connected to the driving square head 4;

[0026] A chip removal groove 5 is formed between the cone 1 and the neck 2, a cutting edge 8 is formed on the cone 1, a clearance 6 is provided on the cutting edge 8, and a chamfer 7 is formed at the front end of the cutting edge 8;

[0027] Cone 1: Connected to the neck 2, it is the main part for cutting. Cone 1 is provided with a cutting edge 8, the front end of which has a chamfer 7 and a clearance 6. A chip groove 5 is formed between cone 1 and neck 2.

[0028] Neck 2: connects the cone 1 and the round handle 3, serving as a transition.

[0029] Round handle 3: connected to the driving square head 4, convenient for holding and installation on the tool.

[0030] Driving square head 4: used to connect with driving equipment and transmit power.

[0031] Chip discharge groove 5: located between the cone 1 and the neck 2, used to discharge iron chips generated by cutting.

[0032] Avoidance 6: It is set on the cutting edge 8 of the cone 1 to reduce cutting resistance.

[0033] Chamfer 7: Located at the front end of the cutting edge 8, it guides the tap into the workpiece.

[0034] Cutting edge 8: The key part on cone 1 for thread processing.

[0035] The core 9 is located in the middle of the cone 1 and has a thickness of 60% of the overall diameter. The core 9 is hollow and has an inner cooling water outlet hole 10 .

[0036] Internal cooling water outlet hole 10: provided in the core 9, coolant can be injected to reduce the cutting temperature.

[0037] The blade 11 is formed by the cutting edge 8, the clearance 6 and the chamfer 7 on the core 9 and is distributed in four circles.

[0038] like Figure 1 As shown, in some embodiments, the central portion of the taper 1 is a core 9, which is hollow and has an internal cooling hole 10. When machining ductile iron with a tap, a large amount of heat is generated. The internal cooling hole 10 can inject coolant to effectively lower the temperature in the cutting area, reducing wear and deformation of the tap caused by high temperatures and extending the service life of the tap.

[0039] like Figure 1 As shown, in some embodiments, the cutting edge 8, the relief 6, and the chamfer 7 on the core 9 form a cutting edge 11. The core 9 is a key component of the taper 1, and its cutting edge 8 is a critical part of the cutting process, responsible for cutting threads in ductile iron. The provision of the relief 6 reduces resistance during the cutting process, prevents excessive friction between the cutting edge 8 and the workpiece, reduces cutting force and energy consumption, and also helps reduce wear on the cutting edge 8. The chamfer 7 at the front end of the cutting edge 8 guides the tap smoothly into the workpiece, making the cutting process smoother and reducing impact and damage to the workpiece.

[0040] like Figure 2As shown, in some embodiments, the cutting edge 11 is divided into four segments and distributed circumferentially. The even distribution of the four cutting edges 11 around the circumference distributes the cutting force more evenly across the tap. During the machining process, each cutting edge 11 handles a portion of the cutting load, preventing deformation or damage to the tap caused by excessive local cutting forces. This improves cutting stability and precision, ensuring thread quality.

[0041] like Figure 2 As shown, in some embodiments, the core 9 has a thickness of up to 60% of the tap's overall diameter. Combined with the internal coolant holes 10, the tap body exhibits high strength and excellent chip evacuation during ductile iron machining. The thicker core 9 provides greater strength for the tap. Ductile iron machining experiences high cutting forces, requiring the tap to possess sufficient strength to resist deformation and breakage. The thicker core 9 can withstand greater cutting forces and torque, ensuring the tap remains stable during machining and reducing damage caused by insufficient strength.

[0042] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A special tap for ductile iron, comprising a tap body, characterized in that: The tap body is composed of a taper (1), a neck (2), a round handle (3) and a driving square head (4); The cone (1) is connected to the neck (2), the neck (2) is connected to the round handle (3), and the round handle (3) is connected to the driving square head (4); A chip removal groove (5) is formed between the cone (1) and the neck (2); a cutting edge (8) is formed on the cone (1); a gap (6) is provided on the cutting edge (8); and a chamfer (7) is formed at the front end of the cutting edge (8); the middle of the cone (1) is a core (9); and the core (9) is hollow and provided with an internal cooling water outlet hole (10); The cutting edge (8), the clearance (6) and the chamfer (7) on the core (9) form a cutting edge (11).

2. A special tap for ductile iron according to claim 1, characterized in that: The blade (11) is divided into four and distributed around the circumference.

3. The special tap for ductile iron according to claim 2, characterized in that: The core (9) has a thickness up to 60% of the overall diameter.

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