Chamfering drill

Abstract

The utility model relates to the technical field of drill bits, in particular to a chamfering drill which comprises a cutter bar and a drill bit, a step-shaped sliding hole is formed in the cutter bar, the drill bit is connected in the sliding hole in a sliding mode, the drill bit cannot rotate relative to the sliding hole, the top of the sliding hole is in threaded connection with an adjusting screw rod, and a spring is arranged between the adjusting screw rod and the drill bit. The top of the drill bit is detachably and fixedly connected with a flat gasket preventing the drill bit from sliding out of the sliding hole. The drill bit and the flat gasket are connected through an anti-disengaging bolt. A sliding groove communicated with the sliding hole is formed in the cutter bar in the length direction, an anti-rotation stop lever for preventing the drill bit from rotating is slidably connected into the sliding groove, and the anti-rotation stop lever is detachably and fixedly connected with the drill bit; by arranging the detachably-connected gasket, the drill bit can be prevented from sliding out of the sliding hole, machining and mounting are convenient, and the drill bit can be independently replaced after being damaged; by arranging a sliding groove and an anti-rotation stop lever, the drill bit can be prevented from rotating, machining and mounting are convenient, and the drill bit can be independently replaced after being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of drill bits, in particular to a chamfering drill. Background Art

[0002] General chamfering drills are only suitable for workpieces with high flatness. Due to workpiece welding and thermal cutting, the workpieces are deformed, resulting in some workpieces with very poor flatness, which cannot be chamfered using traditional chamfering drills.

[0003] The patent with application number 202022223447.9 discloses a tool for chamfering threaded holes on the surface of steel blanks, including a tool body, which is provided with a coaxially distributed and connected limiting sliding cavity and a guide hole; the limiting sliding cavity and the guide hole are slidably connected with a sliding rod; the sliding rod includes a first rod part, a second rod part and a limiting protrusion; an elastic element is sleeved on the first rod part; the second rod part extends out of the guide hole at one end away from the limiting protrusion and is fixedly connected with a centering drill bit; an adjusting nut for adjusting the elastic force of the elastic element is provided at one end of the limiting sliding cavity away from the guide hole, and the diameter of the first rod part is not greater than the inner diameter of the adjusting nut; the extension and retraction of the centering drill bit is achieved by arranging components such as the elastic element, the limiting sliding cavity, the guide hole and the sliding rod; when the surface of the steel blank is uneven, the centering drill bit can be extended and retracted to achieve uniform chamfering.

[0004] The disadvantage of the patent with application number 202022223447.9 is that the limiting protrusion prevents the slide rod from sliding out and preventing the slide rod from rotating, and the limiting protrusion is directly processed on the slide rod, which increases the difficulty of processing and installation, and the limiting protrusion cannot be replaced separately after being damaged. Utility Model Content

[0005] The main purpose of the utility model is to provide a chamfer drill to solve the problems in the prior art that the chamfer drill is difficult to process and install, and a single structure cannot be replaced separately after being damaged.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a chamfer drill, including a arbor and a drill bit. The arbor is provided with a stepped sliding hole, the drill bit is slidably connected in the sliding hole, the drill bit cannot rotate relative to the sliding hole, the top of the sliding hole is threadedly connected with an adjusting screw, a spring is provided between the adjusting screw and the drill bit, and a flat gasket is detachably fixedly connected to the top of the drill bit to prevent the drill bit from slipping out of the sliding hole.

[0007] Furthermore, the drill bit and the flat gasket are connected by anti-drop bolts.

[0008] Furthermore, the cutter bar is provided with a slide groove connected to the slide hole along the length direction, and an anti-rotation blocking rod for preventing the drill bit from rotating is slidably connected in the slide groove, and the anti-rotation blocking rod is detachably fixedly connected to the drill bit.

[0009] Furthermore, the anti-rotation blocking rod is threadedly connected to the drill bit.

[0010] Furthermore, the number of the slide grooves is two, and the two slide grooves are symmetrically arranged on both sides of the knife rod.

[0011] The utility model can prevent the drill bit from slipping out of the sliding hole by arranging a detachably connected gasket, and is easy to process and install, and can be replaced separately after being damaged; the utility model can prevent the drill bit from rotating by arranging a sliding groove and an anti-rotation baffle rod, and is easy to process and install, and can be replaced separately after being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0013] Figure 1 It is a structural schematic diagram of an embodiment;

[0014] Figure 2 It is a structural schematic diagram of the chute in the embodiment;

[0015] Figure 3 A schematic diagram of chamfering a chamfer drill;

[0016] In the figure: 1. tool rod; 101. slide groove; 2. drill bit; 3. adjusting screw; 4. spring; 5. flat washer; 6. anti-drop bolt; 7. anti-rotation lever. DETAILED DESCRIPTION

[0017] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0018] like Figure 1 to Figure 2 As shown, according to an embodiment of the utility model, a chamfer drill is provided, including a tool rod 1 and a drill bit 2. The tool rod 1 is provided with a stepped sliding hole with a larger inner diameter of an upper hole and a smaller inner diameter of a lower hole; the drill bit 2 is slidably connected in the sliding hole, and the drill bit 2 cannot rotate relative to the sliding hole; an adjusting screw 3 is threadedly connected to the top of the sliding hole, and a spring 4 is arranged between the adjusting screw 3 and the drill bit 2, and the elastic force of the spring 4 can be adjusted by turning the adjusting bolt 3; a flat gasket 5 is detachably fixedly connected to the top of the drill bit 2 through an anti-slip bolt 6 to prevent the drill bit 2 from sliding out of the sliding hole, and the flat gasket 5 is located in the upper hole of the stepped hole.

[0019] Two long strip slide grooves 101 connected to the slide hole are symmetrically arranged on both sides of the tool rod 1 along the length direction. An anti-rotation blocking rod 7 for preventing the drill bit 2 from rotating is slidably connected in the slide groove 101. The anti-rotation blocking rod 7 is fixedly connected to the drill bit 2 by threading.

[0020] The working principle of the above embodiment is:

[0021] like Figure 3 As shown, when the chamfering drill is chamfering on an uneven surface, the spring 4 enables the drill bit 2 to rebound up and down according to the uneven surface of the workpiece, thereby ensuring the uniformity of the chamfering.

[0022] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A chamfering drill, comprising a shank (1) and a drill bit (2), wherein the shank (1) is provided with a stepped sliding hole, the drill bit (2) is slidably connected in the sliding hole, the drill bit (2) cannot rotate relative to the sliding hole, an adjusting screw (3) is threadedly connected to the top of the sliding hole, a spring (4) is provided between the adjusting screw (3) and the drill bit (2), and the characteristics are: A flat washer (5) is detachably fixedly connected to the top of the drill bit (2) to prevent the drill bit (2) from sliding out of the sliding hole.

2. The chamfer drill according to claim 1, characterized in that: The drill bit (2) and the flat gasket (5) are connected via an anti-drop bolt (6).

3. The chamfer drill according to claim 1, characterized in that: The shank (1) is provided with a slide groove (101) connected to the slide hole along its length direction, an anti-rotation blocking rod (7) is slidably connected in the slide groove (101) to prevent the drill bit (2) from rotating, and the anti-rotation blocking rod (7) is detachably fixedly connected to the drill bit (2).

4. The chamfer drill according to claim 3, characterized in that: The anti-rotation blocking rod (7) is threadedly connected to the drill bit (2).

5. The chamfer drill according to claim 3, characterized in that: The number of the sliding grooves (101) is two, and the two sliding grooves (101) are symmetrically arranged on both sides of the knife rod (1).

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