Deep hole drilling

Abstract

A deep hole drill, a hollow drill rod is connected to the front end with a hollow drill bit, a wedge-shaped protrusion is fixed on the inner wall of the front end of the hollow drill rod, a discharge port is opened at the front part of the hollow drill rod behind the protrusion, a hollow transmission rod extends into the hollow drill rod from the rear end thereof, the transmission rod and the hollow drill rod are slidably connected, and a spring is arranged between the transmission rod and the hollow drill rod. During the drilling operation of the deep hole drill, during drilling, a material rod will gradually form inside the front end of the hollow drill rod, and as the drilling continues, the protrusion will break the material rod, and as the drilling continues, the material rod is formed again and broken again, and more material rod segments gradually accumulate in the hollow drill rod, the transmission rod is gradually retracted while the transmission rod continues to rotate, the discharge port is opened, and the material rod segments accumulated in the hollow drill rod are discharged from the discharge port. During the drilling operation, cooling water is injected into the transmission rod to cool the hollow drill bit.

Description

Technical Field

[0001] The invention relates to a drilling tool, in particular to a deep hole drill. Background Art

[0002] Drill bits are generally divided into two types: hollow drill bits and solid drill bits. Existing hollow drill bits are short in length and cannot drill deep enough. For drilling operations with greater drilling depths, solid drill bits with longer lengths are currently mainly used. The problems with solid drill bits are: poor chip removal during drilling, greater resistance, slow drilling speed, and low operating efficiency; during drilling, cooling water can only be added from the outer port of the drill hole, which is not ideal for cooling the drill bit. Summary of the invention

[0003] The object of the present invention is to provide a deep hole drill which has good material discharge capacity and a reasonable cooling water filling structure.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following scheme: a deep hole drill, which has a hollow drill rod, a hollow drill bit is connected to the front end of the hollow drill rod, a wedge-shaped protrusion is fixed on the inner wall of the front end of the hollow drill rod, a discharge port is opened at the front part of the hollow drill rod behind the protrusion, a hollow transmission rod extends into the hollow drill rod from the rear end thereof, the transmission rod and the hollow drill rod are slidably connected, a spring is provided between the transmission rod and the hollow drill rod, and the spring is installed on the transmission rod.

[0005] As can be seen from the above scheme, the transmission rod of the deep hole drill is installed on the drilling rig to carry out the drilling operation. During the operation, when drilling, the spring is compressed, the transmission rod closes the discharge port, and a material rod is gradually formed inside the front end of the hollow drill rod. As the drilling continues, the inclined surface of the protrusion gradually enters the gap between the material rod and the hollow drill rod, thereby breaking the material rod. With continuous drilling, the material rod is formed again, and the material rod is broken again, a large number of broken material rod segments are gradually accumulated in the hollow drill rod. When the drilling rig drives the transmission rod to continue to rotate, the transmission rod is gradually retreated with the transmission rod, and the discharge port is opened. Under the action of the spring, the hollow drill rod continues to drill, and the material rod segments accumulated in the hollow drill rod gradually reach the discharge port and are discharged from the discharge port. The above-mentioned drilling and retreating process is continuously repeated to complete the drilling operation. In addition, during the drilling operation, cooling water is injected into the transmission rod to cool the hollow drill bit.

[0006] The invention has reasonable structure and reliable performance, strong drilling ability, timely material discharge and reliable cooling, and can greatly improve the drilling operation efficiency, and is an ideal deep drilling tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0008] Figure 2 for Figure 1 A-direction view;

[0009] Figure 3 for Figure 1 B view. DETAILED DESCRIPTION

[0010] The present invention is further described below with reference to the embodiments and the accompanying drawings.

[0011] See also Figure 1 , Figure 3

[0012] The deep hole drill provided by the present invention comprises a hollow drill rod 3, a hollow drill bit 1 is connected to the front end of the hollow drill rod 3, a wedge-shaped protrusion 2 is fixed on the inner wall of the front end of the hollow drill rod 3, a discharge port 3a is opened at the front part of the hollow drill rod 3 behind the protrusion 2, a hollow transmission rod 7 extends into the hollow drill rod 6 from the rear end thereof, the transmission rod 7 and the hollow drill rod 3 are slidably connected, a spring 6 is arranged between the transmission rod 7 and the hollow drill rod 3, and the spring 6 is installed on the transmission rod 7.

[0013] See also Figure 1 , Figure 2

[0014] In this embodiment, the sliding connection structure between the transmission rod 7 and the hollow drill rod 3 is that a pair of slide grooves 3b are opened in the axial direction of the hollow drill rod 3, and two sliders 5 corresponding to the pair of slide grooves are fixed on the transmission rod 7, and each slider 5 is slidably matched with the corresponding slide groove 3b. With this structure, the transmission rod 7 can transmit torque to the hollow drill rod 3, and the two can slide relative to each other.

[0015] See also Figure 1

[0016] In this embodiment, the transmission rod 7 is loosely matched with the hollow drill rod 3, and a sealing gasket 4 is installed on the front end of the transmission rod 7. With this structure, when cooling water is added to the transmission rod 7 during drilling, leakage of cooling water can be avoided, ensuring that the hollow drill bit 1 is ideally cooled.

Claims

1. A deep hole drilling machine, characterized in that: The utility model has a hollow drill rod, the front end of which is connected with a hollow drill bit, a wedge-shaped protrusion is fixed on the inner wall of the front end of the hollow drill rod, a discharge port is provided at the position of the front part of the hollow drill rod behind the protrusion, a hollow transmission rod extends into the hollow drill rod from the rear end thereof, the transmission rod and the hollow drill rod are slidably connected, a spring is arranged between the transmission rod and the hollow drill rod, the spring is arranged on the transmission rod, a pair of slide grooves are axially arranged on the hollow drill rod, two sliders corresponding to the pair of slide grooves are fixed on the transmission rod, each slider is slidably matched with the corresponding slide groove, the transmission rod and the hollow drill rod are clearance matched, a sealing gasket is arranged on the front end of the transmission rod, during the operation, when drilling, the spring is compressed, and the transmission rod closes the discharge port.

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