Combined carbide gun drill

Abstract

The utility model relates to gun drill technical field especially, relate to a combined hard alloy gun drill, the utility model discloses reasonable structure design, it mainly comprises the gun head, gun barrel and gun handle, before gun barrel and gun head welding fixed, first utilize the cooperation of lock plate and T -shaped lock groove to connect, utilize riveting piece again and lock the position of lock plate and gun barrel, can improve the connecting strength of gun barrel and gun head through this mode, weld reinforcing rib plate between gun barrel and gun handle, can improve the reliability of connection, set up reinforcing rib plate as the leaf plate structure simultaneously, so that all reinforcing rib plate can constitute the impeller with gun handle, and the impeller can assist blowing scrap in the drilling process.

Description

Technical Field

[0001] This utility model relates to the field of gun drill technology, and in particular to a combined carbide gun drill. Background Technology

[0002] Carbide gun drills are high-efficiency, precision deep-hole machining tools. Their core function is to solve problems such as skewing and chip removal difficulties encountered with traditional drills when machining deep holes. Gun drills use carbide tips, controlling the straightness error of deep holes to within 0.1mm / 100mm. Carbide gun drills are widely used in the machining of precision components such as hydraulic valve bodies, gun barrels, and engine fuel injectors. Compared to ordinary twist drills, they offer 3-5 times higher efficiency and can achieve one-step forming without the need for reaming, significantly reducing production costs.

[0003] The combined carbide gun drill mainly consists of a shaft, a head, and a handle. Existing combined carbide gun drills have shortcomings in use: firstly, the head is usually connected to the front of the shaft via a threaded connection, which can loosen or even detach during drilling due to significant external friction; secondly, the weld strength between the shaft and handle is low, resulting in poor connection reliability. Therefore, it is necessary to optimize and improve existing combined carbide gun drills. Summary of the Invention

[0004] The purpose of this invention is to overcome the aforementioned problems in traditional technologies and to provide a combined carbide gun drill.

[0005] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution:

[0006] A combined carbide gun drill includes a gun head, a gun shaft, and a gun handle. The tail of the gun head has an axially arranged T-shaped locking groove and a radially arranged riveting groove. The front end of the gun shaft has two symmetrical locking plates that can extend into the T-shaped locking groove. The locking plates have riveting through holes corresponding to the riveting grooves. The gun head is fixedly connected to the locking plates of the gun shaft by riveting components. An annular reinforcing ring is welded between the tail end of the gun head and the top end of the gun shaft. Several reinforcing ribs are welded circumferentially between the tail end of the gun shaft and the front end of the gun handle. All the reinforcing ribs and the gun handle together form an impeller that can assist in chip blowing.

[0007] Furthermore, in the aforementioned combined carbide gun drill, the front end of the locking plate is provided with an anti-dislodgement head, and the outer side of the anti-dislodgement head is provided with an inclined surface that facilitates pushing the narrow part of the T-shaped locking groove to tilt and deform inward when in contact with it.

[0008] Furthermore, in the aforementioned combined carbide gun drill, the tail end of the gun head and the top end of the gun shaft are respectively provided with rounded annular grooves to facilitate increasing the welding area.

[0009] Furthermore, in the aforementioned combined carbide gun drill, the diameter of the tail end of the gun head is equal to the diameter of the top end of the gun shaft.

[0010] Furthermore, in the aforementioned combined carbide gun drill, the riveting component is connected to the gun head and locking plate through a core-pulling riveting process.

[0011] Furthermore, in the aforementioned combined carbide gun drill, the tail end of the gun barrel is provided with a square anti-torsion protrusion, and the front end of the gun handle is provided with a square anti-torsion groove that mates with the square anti-torsion protrusion.

[0012] Furthermore, in the aforementioned combined carbide gun drill, the gun head is made of YG8N carbide, and the surface of the gun head is coated with a titanium nitride coating to improve the cutting performance of the gun drill.

[0013] Furthermore, in the aforementioned combined carbide gun drill, the gun shank is made of tungsten-cobalt carbide, which can balance toughness and strength.

[0014] The beneficial effects of this utility model are:

[0015] This utility model has a reasonable structural design, mainly consisting of a gun head, a gun barrel, and a gun handle. On the one hand, before welding and fixing the gun barrel and gun head, a locking plate and a T-shaped locking groove are used to connect them, and then a riveting component is used to lock the position of the locking plate and the gun barrel. This method can improve the connection strength between the gun barrel and the gun head. On the other hand, a reinforcing rib plate is welded between the gun barrel and the gun handle to improve the connection reliability. At the same time, the reinforcing rib plate is set as a blade structure, so that all the reinforcing rib plates can form an impeller together with the gun handle. The impeller can assist in blowing away chips during the drilling process.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the above advantages at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the gun head structure in this utility model;

[0020] Figure 3 This is a front view schematic diagram of the gun barrel and locking plate in this utility model;

[0021] Figure 4 This is a top view of the gun barrel and locking plate in this utility model;

[0022] Figure 5 This is a schematic diagram of the impeller in this utility model;

[0023] In the attached diagram, the components represented by each number are as follows:

[0024] 1-Gunhead, 2-Gun shaft, 3-Gun handle, 4-T-shaped lock groove, 5-Riveting groove, 6-Locking plate, 7-Riveting component, 8-Annular reinforcing ring, 9-Reinforcing rib plate, 10-Riveting through hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figures 1-5 As shown, this embodiment provides a combined carbide gun drill, including a gun head 1, a gun shaft 2, and a gun handle 3. The tail of the gun head 1 has an axially oriented T-shaped locking groove 4 and a radially oriented riveting groove 5, the riveting groove 5 communicating with the narrow portion of the T-shaped locking groove 4. The front end of the gun shaft 2 has two symmetrically arranged locking plates 6 that can extend into the T-shaped locking groove 4, and the locking plates 6 have riveting through holes 10 corresponding to the riveting groove 4. The gun head 1 is fixedly connected to the locking plates 6 of the gun shaft 2 by riveting components 7. An annular reinforcing ring 8 is welded between the tail end of the gun head 1 and the top end of the gun shaft 2. Several reinforcing ribs 9 are welded circumferentially between the tail end of the gun shaft 2 and the front end of the gun handle 3, all the reinforcing ribs 9 and the gun handle 3 together forming an impeller that assists in chip removal.

[0027] In this embodiment, the front end of the locking plate 6 is provided with an anti-detachment head, and the outer side of the anti-detachment head is provided with a beveled part that facilitates pushing the narrow part of the T-shaped locking groove to tilt and deform inward when it comes into contact with it.

[0028] In this embodiment, rounded annular grooves are provided at the edges of the tail end of the gun head 1 and the top end of the gun shaft 2 to facilitate increasing the welding area.

[0029] In this embodiment, the diameter of the tail end of the gun head 1 is equal to the diameter of the top end of the gun barrel 2.

[0030] In this embodiment, the riveting component 7 is connected to the gun head 1 and the locking plate 6 by a core-pulling riveting process.

[0031] In this embodiment, the tail end of the gun barrel 2 is provided with a square anti-torsion protrusion, and the front end of the gun handle 3 is provided with a square anti-torsion groove that cooperates with the square anti-torsion protrusion.

[0032] In this embodiment, the gun head 1 is made of YG8N cemented carbide, and the surface of the gun head 1 is coated with a titanium nitride coating to improve the cutting performance of the gun drill.

[0033] In this embodiment, the gun barrel 2 is made of tungsten-cobalt hard alloy, which can balance toughness and strength.

[0034] The specific application of this embodiment is as follows: This gun drill mainly consists of a gun head 1, a gun shaft 2, and a gun handle 3. Before the gun shaft 2 and the gun head 1 are welded and fixed, they are first connected by the cooperation of the locking plate 6 and the T-shaped locking groove 4. Then, the positions of the locking plate 6 and the gun shaft 2 are locked by the riveting part 7. This method can improve the connection strength between the gun shaft 2 and the gun head 1. Welding a reinforcing rib plate 9 between the gun shaft 2 and the gun handle 3 can improve the connection reliability. At the same time, the reinforcing rib plate 9 is set as a blade structure. In this way, all the reinforcing rib plates 9 can form an impeller together with the gun handle. The impeller can assist in blowing chips during the drilling process.

[0035] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to specific implementation methods. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A combined carbide gun drill, comprising a gun head, a gun shaft, and a gun handle, characterized in that, The tail of the gun head is provided with an axially arranged T-shaped locking groove and a radially arranged riveting groove. The front end of the gun barrel is provided with two locking plates that can extend into the T-shaped locking groove. The locking plates are provided with riveting through holes corresponding to the riveting grooves. The gun head is fixedly connected to the locking plates of the gun barrel by riveting parts. An annular reinforcing ring is welded between the tail end of the gun head and the top end of the gun barrel. Several reinforcing ribs are welded circumferentially between the tail end of the gun barrel and the front end of the gun handle. All the reinforcing ribs and the gun handle together form an impeller that can assist in blowing away debris.

2. The combined carbide gun drill according to claim 1, characterized in that, The front end of the lock plate is provided with an anti-detachment head, and the outer side of the anti-detachment head is provided with a beveled part that facilitates pushing the narrow part of the T-shaped lock groove to tilt and deform inward when it comes into contact with it.

3. The combined carbide gun drill according to claim 1, characterized in that, The tail end of the gun head and the top end of the gun shaft are each provided with rounded annular grooves to facilitate increasing the welding area.

4. A combined carbide gun drill according to claim 1, characterized in that, The diameter of the tail end of the gun head is equal to the diameter of the top end of the gun shaft.

5. A combined carbide gun drill according to claim 1, characterized in that, The riveting components are connected to the gun head and locking plate through a core-pulling riveting process.

6. A combined carbide gun drill according to claim 1, characterized in that, The gun barrel has a square anti-torsion protrusion at its tail end, and the gun handle has a square anti-torsion groove at its front end that mates with the square anti-torsion protrusion.

7. A combined carbide gun drill according to claim 1, characterized in that, The gun head is made of YG8N cemented carbide, and its surface is coated with a titanium nitride coating to improve the cutting performance of the gun drill.

8. A combined carbide gun drill according to claim 1, characterized in that, The gun barrel is made of tungsten-cobalt hard alloy, which can balance toughness and strength.

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