Hard alloy threaded handle twist drill with internal cooling structure

Abstract

The utility model relates to the field of machining, in particular to a hard alloy threaded handle twist drill with an internal cooling structure, which comprises a motor head, a clamping opening is arranged at the front end of the motor head, a drill bit is clamped and fixed in the clamping opening, and an internal cooling device is arranged in the drill bit; the inner cooling device comprises a water inlet fixing groove, a plurality of stable inserting rods are fixedly connected to the upper end face of the water inlet fixing groove, clamping fixing grooves are correspondingly inserted into the stable inserting rods, and the clamping fixing grooves are formed in the outer side of the front end of the motor head; the inner cooling device has the advantages that by arranging the inner cooling device, when a workpiece is machined by the hard alloy thread handle twist drill, the drill bit can be cooled in real time through water cooling circulation in the drill bit, meanwhile, rotation work of the drill bit is not affected, and the service life of the drill bit is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of mechanical processing, in particular to a carbide threaded shank twist drill with an internal cooling structure. Background Art

[0002] A twist drill is a tool that drills a circular hole in a workpiece by rotating it relative to a fixed axis. It is named because its chip groove is spiral and resembles a twist. The spiral groove can have 2, 3 or more grooves, but 2 grooves are the most common. Twist drills can be clamped on manual or electric handheld drilling tools or drilling machines, milling machines, lathes and even machining centers. The drill bit material is generally cemented carbide.

[0003] When a traditional carbide threaded shank twist drill is processing a workpiece, the service life of the drill bit is usually short due to the high internal temperature of the twist drill. At the same time, excessively high temperature may affect the hardness of the drill bit during long-term use. Therefore, the utility model proposes a carbide threaded shank twist drill with an internal cooling structure to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a carbide threaded shank twist drill with an internal cooling structure 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 carbide threaded shank twist drill with an internal cooling structure, comprising a motor head, a clamping opening is provided at the front end of the motor head, a drill bit is clamped and fixed in the clamping opening, and an internal cooling device is arranged in the drill bit; the internal cooling device comprises a water inlet fixing groove, a plurality of stable plug-in rods are fixedly connected to the upper end surface of the water inlet fixing groove, the stable plug-in rods are correspondingly plugged with a clamping fixing groove, and the clamping fixing groove is arranged on the outer side of the front end of the motor head.

[0006] Preferably, the internal cooling device includes a fluid exchange pipe, which is opened in the center of the drill bit, and the lower end of the fluid exchange pipe is connected to a cooling pipe, which is spirally opened in the convex tool on the outer side of the drill bit, and the outside of the cooling pipe is connected to a water inlet sealing port.

[0007] Preferably, a sealing gasket is fixedly connected to the inner end of the water inlet fixed groove, a drill is provided in the sealing rotating sleeve inside the sealing gasket, and a water inlet sealing port is provided between the sealing gaskets.

[0008] Preferably, the upper end surface of the water inlet fixed groove is fixedly connected to a water outlet fixed groove, a drill bit is provided in the corresponding sealing sleeve in the water outlet fixed groove, and a liquid exchange pipe is connected in the water outlet fixed groove.

[0009] Preferably, the outer end of the water inlet fixed groove is fixedly connected to a water inlet pipe.

[0010] Preferably, the outer end of the water outlet fixed groove is fixedly connected to a water outlet pipe, and a cooling circulation device is connected between the water outlet pipe and the water inlet pipe.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model provides an internal cooling device, so that when the carbide threaded shank twist drill processes a workpiece, the drill bit can be cooled in real time through water cooling circulation inside the drill bit, while the rotation of the drill bit is not affected, thereby increasing the working life of the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the internal connection structure of the utility model;

[0015] Figure 3 for Figure 2 The enlarged schematic diagram at A in the middle;

[0016] Figure 4 It is a schematic diagram of the partial structure of the utility model;

[0017] Figure 5 It is a partial structural schematic diagram of the utility model;

[0018] Figure 6 It is a schematic diagram of the front side of part of the structure of the utility model.

[0019] In the figure: 1 motor head, 2 drill bit, 3 water inlet fixing groove, 4 water outlet fixing groove, 5 water outlet pipe, 6 water inlet pipe, 7 stabilizing plug-in rod, 8 cooling pipe, 9 liquid exchange pipe, 10 water inlet sealing port, 11 sealing gasket, 12 clamping port, 13 clamping fixing groove. DETAILED DESCRIPTION

[0020] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of 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.

[0021] In the description of the present utility model, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", "sixth" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] For the purpose of simplicity and illustration, the principles of the embodiments are mainly described by reference to examples. In the following description, many specific details are proposed to provide a thorough understanding of the embodiments. However, it is obvious that for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, known methods and structures are not described in detail to avoid making these embodiments unnecessarily difficult to understand. In addition, all embodiments can be used in combination with each other.

[0024] See also Figures 1 to 6 The utility model provides a technical solution: a carbide threaded shank twist drill with an internal cooling structure, comprising a motor head 1, a clamping opening 12 is opened at the front end of the motor head 1, a drill bit 2 is clamped and fixed in the clamping opening 12, and an internal cooling device is arranged in the drill bit 2; the internal cooling device comprises a water inlet fixing groove 3, a plurality of stable plug-in rods 7 are fixedly connected to the upper end surface of the water inlet fixing groove 3, and the stable plug-in rods 7 are correspondingly plugged with a clamping fixing groove 13, and the clamping fixing groove 13 is arranged on the outer side of the front end of the motor head 1.

[0025] The motor head 1 can drive the drill bit 2 clamped in the clamping port 12 to rotate. The stabilizing plug-in rod 7 fixed on the upper end surface of the water inlet fixing groove 3 is correspondingly plugged into the clamping fixing groove 13 when the drill bit 2 is fixed in the clamping port 12, thereby fixing the drill bit 2 and preventing the water inlet fixing groove 3 from rotating.

[0026] The internal cooling device includes a liquid exchange pipe 9, which is opened in the center of the drill bit 2. The lower end of the liquid exchange pipe 9 is connected to a cooling pipe 8, which is spirally opened in the convex tool outside the drill bit 2, and the cooling pipe 8 is connected to a water inlet sealing port 10.

[0027] The liquid exchange pipe 8 is opened in a straight line at the center of the drill bit 2, so that the water with poor condensation effect after being heated can be directly sent back. The cooling pipe 8 is spirally started inside the convex tool on the outside of the drill bit 2, with a large contact area, which improves the cooling efficiency. The setting of the water inlet sealing port 10 improves the efficiency of the coolant entering the cooling pipe 8 and prevents the coolant from leaking.

[0028] A sealing gasket 11 is fixedly connected to the inner end of the water inlet fixed groove 3, a drill bit 2 is provided in the sealing rotating sleeve inside the sealing gasket 11, a water inlet sealing port 10 is provided between the sealing gaskets 11, a water outlet fixed groove 4 is fixedly connected to the upper end surface of the water inlet fixed groove 3, a drill bit 2 is provided in the corresponding sealing sleeve in the water outlet fixed groove 4, a liquid exchange pipe 9 is connected in the water outlet fixed groove 4, a water inlet pipe 6 is fixedly connected to the outer end of the water inlet fixed groove 3, a water outlet pipe 5 is fixedly connected to the outer end of the water outlet fixed groove 4, and a cooling circulation device is connected between the water outlet pipe 5 and the water inlet pipe 6.

[0029] After the coolant heats the drill bit 2 in the cooling pipe 8, it flows out from the liquid exchange pipe 9 to the water outlet fixed groove 4, enters the cooling circulation equipment from the water outlet pipe 5 for cooling, and is then transported to the water inlet pipe 6 to enter the water inlet fixed groove 3, and enters the cooling pipe 8 through the water inlet sealing port 10 to realize circulation.

[0030] In actual use, the motor head 1 can drive the drill bit 2 clamped in the clamping port 12 to rotate. The stable plug-in rod 7 fixed on the upper end face of the water inlet fixed groove 3 is correspondingly plugged into the clamping fixed groove 13 when the drill bit 2 is fixed in the clamping port 12 to achieve fixation and prevent the water inlet fixed groove 3 from rotating. The liquid exchange pipe 8 is opened in a straight line at the center of the drill bit 2, so that the water with poor condensation effect after being heated is directly sent back. The cooling pipe 8 is spirally started in the convex tool outside the drill bit 2, with a large contact area, which improves the cooling efficiency. The setting of the water inlet sealing port 10 improves the efficiency of the coolant entering the cooling pipe 8 and prevents the coolant from leaking. After the coolant heats the drill bit 2 in the cooling pipe 8, it flows out from the liquid exchange pipe 9 to the water outlet fixed groove 4, enters the cooling circulation equipment from the water outlet pipe 5 for cooling, and is then transported to the water inlet pipe 6 to enter the water inlet fixed groove 3, and enters the cooling pipe 8 through the water inlet sealing port 10 to achieve circulation.

[0031] 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 carbide threaded shank twist drill with an internal cooling structure, characterized in that: include A motor head (1), wherein a clamping opening (12) is provided at the front end of the motor head (1), a drill bit (2) is clamped and fixed in the clamping opening (12), and an internal cooling device is provided in the drill bit (2); The internal cooling device comprises a water inlet fixing groove (3), the upper end surface of the water inlet fixing groove (3) is fixedly connected with a plurality of stable plug-in rods (7), the stable plug-in rods (7) are correspondingly plugged with a clamping fixing groove (13), the clamping fixing groove (13) is arranged on the outside of the front end of the motor head (1), the internal cooling device comprises a liquid exchange pipe (9), the liquid exchange pipe (9) is arranged at the center of the drill bit (2), the lower end of the liquid exchange pipe (9) is connected to a cooling pipe (8), the cooling pipe (8) is spirally arranged in a convex tool on the outside of the drill bit (2), and the cooling pipe (8) is externally connected with a water inlet sealing port (10).

2. A carbide threaded shank twist drill with an internal cooling structure according to claim 1, characterized in that: The inner end of the water inlet fixed groove (3) is fixedly connected to a sealing gasket (11), a drill bit (2) is provided in a sealing and rotatable sleeve inside the sealing gasket (11), and a water inlet sealing opening (10) is sleeved between the sealing gaskets (11).

3. A carbide threaded shank twist drill with an internal cooling structure according to claim 2, characterized in that: The upper end surface of the water inlet fixed groove (3) is fixedly connected to a water outlet fixed groove (4), a drill bit (2) is provided in the corresponding sealing sleeve in the water outlet fixed groove (4), and a liquid replacement pipe (9) is connected in the water outlet fixed groove (4).

4. A carbide threaded shank twist drill with an internal cooling structure according to claim 3, characterized in that: The outer end of the water inlet fixed groove (3) is fixedly connected to a water inlet pipe (6).

5. The carbide threaded shank twist drill with an internal cooling structure according to claim 3, characterized in that: The outer end of the water outlet fixed groove (4) is fixedly connected to a water outlet pipe (5), and a cooling circulation device is connected between the water outlet pipe (5) and the water inlet pipe (6).

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