Drill bit structure with straight blade

Abstract

The drill bit structure comprises a drill handle, a drill rod and a drill bit, the outer wall of the drill rod is provided with a double-thread chip removal groove, the symmetrical side walls of the drill bit are provided with chip guide grooves, the end face of the drill bit is provided with a linear blade groove, and the bottom wall of the linear blade groove is an arched arc-shaped convex edge; a linear cutting edge is arranged on the drill bit, and the bottom edge of the linear cutting edge is an arc-shaped concave edge; the linear cutting edge is located in the linear cutting edge groove, the arc-shaped concave edge is attached to the arc-shaped convex edge, and the linear cutting edge and the linear cutting edge groove are welded and fixed. The two ends of the linear blade extend out of the side face of the drill bit, and the top edge of the linear blade protrudes out of the end face of the drill bit. The drill bit is reasonable in structural arrangement, the arc-shaped convex edge with the arched bottom wall is arranged on the end face of the drill bit, the arc-shaped concave edge matched with the linear cutting edge is arranged on the end face of the drill bit, the connection contact area of the linear cutting edge and the drill bit is increased, torsion is increased, abrasion resistance is improved, and stability and reliability of connection are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of drill bit, concretely relates to a drill bit structure of straight line blade. BACKGROUND

[0002] In some workpiece machining processes need to carry out drilling operation, and drill bit is common drilling tool, it generally includes drill rod, drill handle and drill bit, and the drill bit in the prior art is integrally formed with the drill rod, and a spiral chip flute is arranged on the drill rod.

[0003] Although it can meet the use demand of general situation, the strength of the drill bit is not high, and since the materials of the drill rod and the drill bit need to be consistent, the processing cost of the drill bit is also greatly increased, the stability of drilling is affected, and since the blade has no positioning part, eccentricity is prone to occur during assembly, the right angle is prone to be broken or damaged during use, the use stability and reliability are affected, and the market demand cannot be met. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a drill bit structure of straight line blade which has reasonable structure and is beneficial to improving use stability.

[0005] The technical scheme for realizing the utility model is a drill bit structure of straight line blade, which comprises a drill handle, a drill rod integrally formed on the drill handle, and a drill bit arranged at an end of the drill rod away from the drill handle, a double-thread chip flute is arranged on the outer wall of the drill rod, a chip flute in communication with the double-thread chip flute is arranged on the symmetrical side wall of the drill bit, a straight line blade groove is arranged on the end face of the drill bit, and the bottom wall of the straight line blade groove is an arched convex edge.

[0006] A straight line blade is arranged on the drill bit, and the bottom edge of the straight line blade is an arched concave edge matched with the arched convex edge.

[0007] The straight line blade is in the straight line blade groove, the arched concave edge is attached to the arched convex edge, and the straight line blade is welded and fixed with the straight line blade groove.

[0008] The two ends of the straight line blade protrude from the side face of the drill bit, and the top edge of the straight line blade protrudes from the end face of the drill bit.

[0009] Further preferably, one end edge of the symmetrical side face of the straight line blade is integrally formed with a positioning convex strip, and the other positioning convex strip is coincided with the one positioning convex strip when the one positioning convex strip is rotated 180 degrees with the midpoint of the straight line blade as the center.

[0010] When the straight line blade is in the straight line blade groove, the two positioning convex strips are positioned on the outer surface of the drill bit.

[0011] It is further preferred that the two chip guides are arranged on both sides of the linear blade groove.

[0012] It is further preferred that the thickness of the linear blade matches the width of the linear blade groove.

[0013] It is further preferred that the linear blade is a cemented carbide blade.

[0014] The utility model discloses a positive effect: the utility model discloses the structure setting is reasonable, and it is provided with the arc convex edge of the bottom wall for the arch in the end face of drill bit, and the arc concave edge of linear blade is matched, and when the both connection positioning, it is favorable to increase the contact area of linear blade and drill bit, and the torsion is increased, and the stability and reliability of connection are guaranteed.

[0015] Meanwhile, the positioning convex strip is integrally formed on one end edge of the symmetric side surface of the linear blade, and when assembling, the positioning convex strip is positioned on the outer surface of the drill bit, which can improve the concentricity of the linear blade and the drill bit, and the positioning convex strip is also conducive to ensuring the position precision of the linear blade in the linear blade groove, so that the displacement of the linear blade is avoided, the thickness of the blade is increased, and the wear resistance is improved, so that the use reliability and effectiveness are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to make the content of the utility model more easily understood clearly, the utility model is further explained in detail below according to specific embodiments and in combination with the drawings, wherein:

[0017] Fig. 1 It is a structural schematic diagram of the utility model;

[0018] Fig. 2 It is a split structural schematic diagram of the utility model;

[0019] Fig. 3 It is a specific structural schematic diagram of the linear blade in the utility model;

[0020] Fig. 4 It is a structural schematic diagram of the connection between the linear blade and the drill bit in the utility model.

[0021] The drawings show that the drill handle 1, the drill rod 2, the drill bit 3, the double thread chip removal groove 4, the chip guide 5, the linear blade groove 6, the arc concave edge 7, the positioning convex strip 8, the linear blade 9. DETAILED DESCRIPTION

[0022] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0023] Embodiment

[0024] See Figs. 1 to 4 As shown in the figure, a straight blade drill bit structure comprises a drill handle 1, a drill rod 2 integrally formed on the drill handle, and a drill bit 3 arranged at the end of the drill rod away from the drill handle. A double-thread chip removal groove 4 is arranged on the outer wall of the drill rod. A chip guide groove 5 is arranged on the symmetrical side wall of the drill bit and is connected to the double-thread chip removal groove. In the present embodiment, the above structure is a conventional structure of the prior art, and therefore is not described in detail.

[0025] In actual application, the end face of the drill bit is provided with a straight blade groove 6. The two chip guide grooves are arranged on both sides of the straight blade groove. The bottom wall of the straight blade groove is an arched convex edge. A straight blade 9 is arranged on the drill bit. The straight blade is a hard alloy blade. The bottom edge of the straight blade is an arched concave edge matched with the arched convex edge. In assembly, the straight blade is in the straight blade groove, the arched concave edge is matched with the arched convex edge, and the straight blade is welded and fixed with the straight blade groove. The two ends of the straight blade protrude from the side face of the drill bit, and the top edge of the straight blade protrudes from the end face of the drill bit. The bottom wall of the straight blade groove of the drill bit is arched and matched with the bottom edge of the straight blade. This not only increases the contact area of the straight blade and the drill bit, thereby improving the stability of the connection, but also improves the toughness and strength during use, thereby improving the service life of the overall structure.

[0026] In actual application, one end edge of the symmetrical side face of the straight blade is integrally formed with a positioning protrusion 8. When one positioning protrusion is rotated 180 degrees with the midpoint of the straight blade as the center, it coincides with the other positioning protrusion. When the straight blade is in the straight blade groove, the two positioning protrusions are positioned on the outer surface of the drill bit. In assembly, the positioning protrusions on different side faces of the straight blade are positioned on the side face of the drill bit, which can prevent the straight blade from shifting, ensure the concentricity of the straight blade and the drill bit, and improve the stability and reliability of use.

[0027] And, in the actual application process, the thickness of the straight blade is matched with the width of the straight blade groove.

[0028] The utility model has the positive effect: the utility model discloses the structure is reasonable, and it is provided with the arc convex edge of the bottom wall of arching on the end face of drill bit, and the arc concave edge of straight blade cooperates, when the two are connected and positioned, it is favorable to increase the contact area of straight blade and drill bit, increases the torsion, guarantees the stability and reliability of connection.

[0029] Meanwhile, the positioning convex strip is integrally formed on one end edge of the symmetrical side surface of the straight blade, and when assembling, the positioning convex strip is positioned on the outer surface of the drill bit, which can improve the concentricity of the straight blade and the drill bit, and the positioning convex strip is also conducive to ensuring the position accuracy of the straight blade in the straight blade groove, so that the straight blade cannot be shifted, the thickness of the straight blade is increased, the wear resistance is improved, and the use reliability and effectiveness are ensured.

[0030] The standard parts used in the embodiment can be directly purchased from the market, and the non-standard structural parts according to the description can also be directly processed according to the existing technical knowledge without any doubt, and the connection mode of each part adopts the mature conventional means in the existing technology, and the machinery, parts and equipment adopt the conventional models in the existing technology, so the specific description is not made here.

[0031] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to enumerate all the embodiments. The changes or variations extended from the essential spirit of the utility model are still within the protection scope of the utility model.

Claims

1. A one-word bit structure, comprising a shank, a drill rod integrally formed on the shank, and a drill bit arranged at the end of the drill rod away from the shank, a double-threaded chip flute is arranged on the outer wall of the drill rod, and a chip guide groove is arranged on the symmetrical side wall of the drill bit and communicated with the double-threaded chip flute, characterized in that: The end face of the drill bit is provided with a one-line blade groove, and the bottom wall of the one-line blade groove is an arched convex edge; ​ The drill bit is provided with a one-line blade, and the bottom edge of the one-line blade is an arched concave edge matched with the arched convex edge; The one-line blade is in the one-line blade groove, the arched concave edge is matched with the arched convex edge, and the one-line blade is welded and fixed with the one-line blade groove; The two ends of the one-line blade protrude from the side surface of the drill bit, and the top edge of the one-line blade protrudes from the end face of the drill bit.

2. The one-chip drill bit structure according to claim 1, wherein: One end edge of the symmetrical side surface of the one-line blade is integrally formed with a positioning convex strip, and the other positioning convex strip is coincided with the other positioning convex strip when the one center of the one-line blade is rotated by 180 degrees; When the one-line blade is in the one-line blade groove, the two positioning convex strips are positioned on the outer surface of the drill bit.

3. The single land bit construction of claim 1 wherein: The two chip guide grooves are arranged on both sides of the one-line blade groove.

4. The single land bit construction of claim 1 wherein: The thickness of the one-line blade is matched with the width of the one-line blade groove.

5. The single land bit construction of claim 1 wherein: The one-line blade is a hard alloy blade.

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