A tungsten steel cutter head and cutter rod connection structure with a welded iron cap connector

Abstract

The utility model discloses a tungsten steel cutter head and cutter rod connection structure of a welded iron cap connector, the tungsten steel cutter head comprises a tungsten steel cutter head body and an iron cap connector, the tail end of the tungsten steel cutter head body is once-formed with a trapezoidal external thread section and an outwardly expanded step portion along the axial direction from the outside to the inside; a trapezoidal internal thread section and an annular recess are formed on the iron cap connector, and a metal powder welding layer is formed between the connecting surfaces of the trapezoidal external thread section of the tungsten steel cutter head body and the trapezoidal internal thread section of the iron cap connector; the utility model greatly improves the connection stability of the tungsten steel cutter head and the iron cap connector through the composite connection effect of the tungsten steel cutter head and the iron cap connector through the screw thread connection and the metal powder welding layer, ensures that the tungsten steel cutter head and the iron cap connector will not fall off, eliminates safety hazards, and at the same time, the iron cap connector is twisted for assembly and disassembly during use, thereby avoiding torsional damage of the tungsten steel cutter head, thereby extending the service life of the tungsten steel cutter head and reducing the customer's use cost.

Description

Technical Field

[0001] The utility model relates to the technical field of CNC tool technology, in particular to a tungsten steel tool head and tool rod connection structure of a welded iron cap connector. Background Art

[0002] The tool heads used in some CNC processing equipment are made of tungsten steel, and the tool rods connected to them are also made of tungsten steel. When in use, the tool heads and the tool rods are assembled or disassembled through threaded connections. Due to the poor torsion resistance of tungsten steel materials, this structural method is often easy to cause damage to the tungsten steel tool heads when tightening the tungsten steel tool heads and the tungsten steel tool rods, resulting in a short service life of the tungsten steel tool heads and high replacement costs. To solve this problem, the prior art uses welding to connect an iron cap connector to the tail of the tungsten steel tool head, and connects to the tool rod through the external thread of the iron cap connector. However, the ordinary welding method has poor stability and is prone to desoldering during actual processing and use, resulting in the separation of the tool head and the iron cap, which poses a major quality problem and a huge safety hazard. Utility Model Content

[0003] The problem to be solved by the utility model is to provide a tungsten steel cutter head and cutter rod connection structure with a welded iron cap connector, so as to improve the connection stability of the tungsten steel cutter head, the iron cap connector and the cutter rod.

[0004] The utility model provides a technical solution to solve the above-mentioned problems: a tungsten steel cutter head and a tool rod connection structure with a welded iron cap connector, the tungsten steel cutter head comprises a tungsten steel cutter head body and an iron cap connector, the tail end of the tungsten steel cutter head body is once formed with a trapezoidal external thread section and an outward-expanding step portion along the axial direction from the outside to the inside; a trapezoidal internal thread section corresponding to the trapezoidal external thread section and an annular recess corresponding to the outward-expanding step portion are once formed at one end of the iron cap connector along the axial direction from the inside to the outside, and the annular recess is communicated with the trapezoidal internal thread section; the trapezoidal external thread section of the tungsten steel cutter head body is connected to the trapezoidal internal thread section of the iron cap connector, and a metal powder welding layer that is bent continuously along the thread surface is formed between their connection surfaces; the outward-expanding step portion and the annular recess are also butt-contacted, and a metal powder welding layer is also formed between their contact surfaces; the outer wall of the iron cap connector is also formed with a pair of parallel cut surface grooves; the other end of the iron cap connector is formed with an external thread that can be connected to the tool rod.

[0005] Furthermore, the inner end of the external thread of the iron cap connector has a conical connecting portion, and correspondingly, a conical hole portion corresponding to the conical connecting portion is formed at the connecting end of the tool rod, and a transition hole connected to the conical hole portion and an internal threaded hole corresponding to the external thread of the iron cap connector are formed inwardly in sequence, and the aperture of the transition hole is larger than the inner diameter of the internal threaded hole and the inner end of the conical hole portion.

[0006] Furthermore, a circle of concave rings is formed on the outwardly expanded step surface, and correspondingly, a circle of convex rings is formed on the bottom surface of the annular recess, and the convex rings are butt-matched with the concave rings.

[0007] Compared with the prior art, the utility model has the following advantages: the utility model greatly improves the connection stability of the tungsten steel cutter head and the iron cap connecting head through the composite connection effect of the screw thread connection and the metal powder welding layer, ensures that the tungsten steel cutter head and the iron cap connecting head will not fall off, eliminates safety hazards, and at the same time, the iron cap connecting head is twisted for assembly and disassembly during use, avoiding torsional damage of the tungsten steel cutter head, thereby extending the service life of the tungsten steel cutter head and reducing customer usage costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the overall cross-sectional structure of the utility model;

[0009] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0010] Figure 3 It is a partial enlarged view of another embodiment of the utility model. DETAILED DESCRIPTION

[0011] like Figure 1 , Figure 2As shown, the present embodiment shows a tungsten steel cutter head and a cutter rod connection structure with a welded iron cap connector, the tungsten steel cutter head comprises a tungsten steel cutter head body 1 and an iron cap connector 2, the tail end of the tungsten steel cutter head body 1 is once formed with a trapezoidal external thread segment 11 and an outwardly expanded step portion 12 along the axial direction from the outside to the inside; a trapezoidal internal thread segment 21 corresponding to the trapezoidal external thread segment 11 and an annular recess 22 corresponding to the outwardly expanded step portion 12 are once formed at one end of the iron cap connector 2 along the axial direction from the inside to the outside, and the annular recess 22 is communicated with the trapezoidal internal thread segment 21; the tungsten steel cutter head The trapezoidal external thread section 11 of the main body 1 is connected to the trapezoidal internal thread section 21 of the iron cap connector 2, and a metal powder welding layer 101 that is continuously curved along the thread surface is formed between their connecting surfaces; the outwardly expanded step portion 12 is also in abutment contact with the annular recessed portion 22, and a metal powder welding layer is also formed between their contact surfaces; the outer wall of the iron cap connector 2 is also formed with a pair of parallel cut surface grooves 23, through which the connection with the tool rod 3 is tightened or loosened; the other end of the iron cap connector 2 is formed with an external thread 24 that can be connected to the tool rod 3. In this embodiment, a silver brazing method can be used to form a metal powder welding layer 101, that is, before the tungsten steel cutter head body 1 and the iron cap connector 2 are connected, a layer of metal powder for welding (such as silver brazing material, etc.) is attached to the surface of the trapezoidal external thread section 11 and the outward step portion 12 of the tungsten steel cutter head body 1, and then the tungsten steel cutter head body 1 and the iron cap connector 2 are screwed together, and the alloy powder is squeezed between the connecting surfaces of the two, and then the alloy powder is melted by heating and filled between the contact surfaces, and then the metal powder welding layer 101 is formed after cooling to achieve a firm welding.

[0012] Furthermore, the inner end of the outer thread 24 of the iron cap connector 2 has a conical connecting portion 25, and correspondingly, a conical hole portion 31 corresponding to the conical connecting portion 25 is formed at the connecting end of the shank 3, and a transition hole 32 connected to the conical hole portion 31 and an internal thread hole 33 corresponding to the outer thread 24 of the iron cap connector 2 are sequentially formed inwardly, and the aperture of the transition hole 32 is larger than the inner diameter of the internal thread hole 33 and the inner end of the conical hole portion 31. Through the cooperation between the conical connecting portion 25, the conical hole portion 31 and the transition hole 32, the iron cap connector 2 and the shank 3 can be tightened as much as possible, so that the connection between the two is more stable.

[0013] Recombination Figure 3 As shown, in another embodiment, a circle of concave ring 121 is formed on the outwardly expanded step surface 12, and correspondingly, a circle of convex ring 221 is formed on the bottom surface of the annular recess 22, and the convex ring 221 is docked with the concave ring 121 to further increase the positioning accuracy and welding contact area, thereby improving stability.

[0014] Compared with the prior art, the utility model has the following advantages: the utility model greatly improves the connection stability of the tungsten steel cutter head and the iron cap connecting head through the composite connection effect of the screw thread connection and the metal powder welding layer, ensures that the tungsten steel cutter head and the iron cap connecting head will not fall off, eliminates safety hazards, and at the same time, the iron cap connecting head is twisted for assembly and disassembly during use, avoiding torsional damage of the tungsten steel cutter head, thereby extending the service life of the tungsten steel cutter head and reducing customer usage costs.

[0015] The above description is only for the best embodiment of the utility model, but it cannot be understood as a limitation of the claims. The utility model is not limited to the above embodiments, and its specific structure is allowed to be changed. All changes made within the protection scope of the independent claims of the utility model are within the protection scope of the utility model.

Claims

1. A tungsten steel cutter head and cutter bar connection structure with a welded iron cap connector, characterized in that: The tungsten steel cutter head comprises a tungsten steel cutter head body and an iron cap connector. The tail end of the tungsten steel cutter head body is formed with a trapezoidal external thread section and an outward-expanded step portion in an axial direction from the outside to the inside; a trapezoidal internal thread section corresponding to the trapezoidal external thread section and an annular recess corresponding to the outward-expanded step portion are formed in an axial direction from the inside to the outside at one end of the iron cap connector, and the annular recess is communicated with the trapezoidal internal thread section; the trapezoidal external thread section of the tungsten steel cutter head body is connected with the trapezoidal internal thread section of the iron cap connector, and a metal powder welding layer that is continuously curved along the thread surface is formed between their connecting surfaces; the outward-expanded step portion and the annular recess are also in butt contact, and a metal powder welding layer is also formed between their contact surfaces; the outer wall of the iron cap connector is also formed with a pair of parallel section grooves; the other end of the iron cap connector is formed with an external thread that can be connected to the tool rod.

2. The tungsten steel cutter head and cutter bar connection structure of the welded iron cap connector according to claim 1, characterized in that: The inner end of the external thread of the iron cap connector is provided with a tapered connecting portion, and correspondingly, a tapered hole portion corresponding to the tapered connecting portion is formed at the connecting end of the tool rod, and a transition hole connected to the tapered hole portion and an internal threaded hole corresponding to the external thread of the iron cap connector are formed inwardly in sequence, and the aperture of the transition hole is larger than the inner diameter of the internal threaded hole and the inner end of the tapered hole portion.

3. The tungsten steel cutter head and cutter bar connection structure of the welded iron cap connector according to claim 1, characterized in that: A circle of concave ring is formed on the outwardly expanded step surface, and correspondingly, a circle of convex ring is formed on the bottom surface of the annular concave portion, and the convex ring is butt-matched with the concave ring.

Images