Anti-fracture high-speed steel straight-shank twist drill

Abstract

The utility model discloses an anti-fracture high-speed steel straight-shank twist drill which comprises a drill handle and a spiral drill bit, the drill handle and the spiral drill bit are integrally arranged, the drill handle and the spiral drill bit are both made of high-speed steel materials, and a liquid drainage channel is formed in the center of the drill handle and the center of the spiral drill bit. A first liquid outlet and a second liquid outlet are formed in the end of the spiral drill bit, the first liquid outlet and the second liquid outlet are both communicated with the liquid discharging channel, and a reinforcing assembly used for reinforcing the twist drill is arranged on the outer side of the drill handle and the outer side of the spiral drill bit. According to the anti-fracture high-speed steel straight-shank twist drill, cooling liquid can be discharged from the chip removal groove, cuttings can be brought out through the cooling liquid, the chip removal efficiency is improved, meanwhile, a spiral groove is formed in the side edge of the spiral drill bit, a second liquid outlet is formed in the spiral groove and communicated with a liquid discharging channel, the discharged cooling liquid flows through the spiral groove, and the cutting efficiency is improved. And the first liquid outlet is matched, so that the cutting part of the drill bit can be effectively cooled, and the anti-fracture effect of the straight-shank twist drill is improved on the whole.

Description

TECHNICAL FIELD

[0001] The utility model relates to straight handle twist drill technical field, concretely is a kind of anti-fracture high speed steel straight handle twist drill. BACKGROUND

[0002] Straight handle twist drill is a common hole processing tool, because its working part has two spiral grooves, and it is named like hemp flower. It is mainly composed of the working part of drill bit and handle part, wherein the working part is responsible for cutting, and the handle part is used for clamping and transmitting power.

[0003] In the actual use process of straight handle twist drill, the chip removal groove on drill bit is responsible for the discharge of chip, if chip cannot be discharged smoothly, it can cause drill bit to be stuck and fall off, and also cause additional heat, and then cause annealing, finally cause drill bit to be broken, so we propose a kind of anti-fracture high speed steel straight handle twist drill to solve the problems proposed in the above. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of anti-fracture high speed steel straight handle twist drill to solve the problem that the straight handle twist drill is easily broken in the use process as proposed in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of anti-fracture high speed steel straight handle twist drill, including drill handle and spiral drill bit, the drill handle and spiral drill bit are integrally arranged, and drill handle and spiral drill bit are all made of high speed steel material, the center position of drill handle and spiral drill bit is provided with liquid discharge passage, the first liquid outlet and second liquid outlet are set in the end head part of spiral drill bit, the first liquid outlet and second liquid outlet are all communicated with liquid discharge passage, the outside of drill handle and spiral drill bit is equipped with the reinforcing assembly for reinforcing twist drill.

[0006] Preferably, the spiral groove is communicated with the second liquid outlet, and the spiral groove penetrates the end head of the spiral drill bit.

[0007] Preferably, the first liquid outlet is located in the spiral groove on the spiral drill bit, and the position of the first liquid outlet is close to the end head of the spiral drill bit.

[0008] Preferably, the reinforcing assembly comprises a mounting base, a fixing sleeve, a first limiting head, a second limiting head, a movable sleeve and a pressing seat, the mounting base is fixed in position on the drill shank or the spiral drill bit through a positioning bolt, the fixing sleeve is fixed on the mounting base, the first limiting head is fixed on the outer end of the fixing sleeve, the movable sleeve is connected to the fixing sleeve, the second limiting head is fixed on one end of the movable sleeve, the pressing seat is fixed on the other end of the movable sleeve, the first limiting head is movably sleeved on the outer side of the movable sleeve, the second limiting head is movably sleeved on the outer side of the fixing sleeve, and the fixing sleeve and the movable sleeve form a stable telescopic structure through the first limiting head and the second limiting head.

[0009] Preferably, a spring is sleeved on the fixing sleeve, one end of the spring is connected with the mounting base, and the other end of the spring is connected with the second limiting head.

[0010] Preferably, rubber gaskets are arranged on the inner sides of the mounting base, the fixing sleeve, the first limiting head, the second limiting head, the movable sleeve and the pressing seat, and the mounting base, the fixing sleeve, the first limiting head, the second limiting head, the movable sleeve and the pressing seat are sleeved on the outer sides of the drill shank and the spiral drill bit, and the rubber gaskets are in direct contact with the outer sides of the drill shank and the spiral drill bit.

[0011] Compared with the prior art, the drill shank and the spiral drill bit have the following beneficial effects:

[0012] (1) The anti-breaking high-speed steel straight shank twist drill is provided with a liquid discharge channel on the drill shank and the spiral drill bit, and a first liquid outlet is arranged in the chip removal groove and communicates with the liquid discharge channel, so that the cooling liquid in the chip removal groove can be discharged during drilling, the cutting chips can be carried out by the cooling liquid, the chip removal efficiency is improved, and the spiral groove is arranged on the side of the spiral drill bit, the second liquid outlet is arranged in the spiral groove and communicates with the liquid discharge channel, the discharged cooling liquid flows through the spiral groove, the first liquid outlet and the spiral groove can effectively cool the cutting part of the drill bit, and the anti-breaking effect of the straight shank twist drill is improved as a whole.

[0013] (2) The fixing sleeve and the movable sleeve are arranged on the outer sides of the drill shank and the spiral drill bit, and the inner sides of the fixing sleeve and the movable sleeve are in contact with the drill shank and the spiral drill bit through the rubber gaskets, and the fixing sleeve and the movable sleeve are sleeved on the outer sides of the drill shank and the spiral drill bit, so that the vibration generated during drilling of the drill shank and the spiral drill bit can be effectively weakened, and the breaking probability of the drill shank and the spiral drill bit is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of the drill shank and the spiral drill bit of the utility model;

[0015] Figure 2 It is a sectional structural schematic view of the drill shank and the spiral drill bit of the utility model;

[0016] Figure 3 For the utility model Figure 2 The structure schematic view of A in the middle;

[0017] Figure 4 The whole structure schematic view of the utility model;

[0018] Figure 5 The structure schematic view of fixed sleeve and movable sleeve of the utility model;

[0019] Figure 6 The structure schematic view of fixed sleeve and movable sleeve of the utility model is cut open.

[0020] In the drawing: 1, drill handle; 2, spiral drill bit; 3, spiral groove; 4, first liquid outlet; 5, second liquid outlet; 6, drainage channel; 7, mounting seat; 8, positioning bolt; 9, fixed sleeve; 10, first limiting head; 11, second limiting head; 12, movable sleeve; 13, pressing seat; 14, spring; 15, rubber gasket; 16, limiting pressing block. Specific implementation

[0021] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.

[0022] Please refer to Figures 1-6 The utility model provides a kind of technical scheme: a kind of anti-fracture high speed steel straight handle twist drill, including drill handle (1) and spiral drill bit (2), the drill handle (1) and spiral drill bit (2) integration is arranged, and drill handle (1) and spiral drill bit (2) are all using high speed steel material quality.

[0023] The center position of the drill handle (1) and spiral drill bit (2) is provided with drainage channel (6), the end head part of the spiral drill bit (2) is provided with first liquid outlet (4) and second liquid outlet (5), and the first liquid outlet (4) and the second liquid outlet (5) are all communicated with drainage channel (6).

[0024] Further, the outer side of the spiral drill bit (2) is provided with spiral groove (3), the spiral groove (3) is communicated with the second liquid outlet (5), cooling liquid can be discharged through the second liquid outlet (5) and flows in the spiral groove (3), and the spiral groove (3) penetrates the end head of the spiral drill bit (2), so that the cooling liquid in the spiral groove (3) flows to the end head of the spiral drill bit (2), to cool the cutting work position of drilling, and improve drilling efficiency.

[0025] Further, the first liquid outlet (4) is located in the spiral groove on the spiral drill bit (2), and the first liquid outlet (4) is located close to the end of the spiral drill bit (2), so that the cooling liquid discharged from the first liquid outlet (4) is discharged outward from the end of the spiral drill bit (2), which can drive the chips to be discharged, reduce the adverse effects of the chips, and reduce the probability of breakage of the drill bit.

[0026] The outer side of the drill shank (1) and the spiral drill bit (2) is provided with a reinforcing assembly for reinforcing the twist drill.

[0027] Further, the reinforcing assembly comprises a mounting seat (7), a fixed sleeve (9), a first limiting head (10), a second limiting head (11), a movable sleeve (12), and a pressing seat (13). The mounting seat (7) is fixed in position on the drill shank (1) or the spiral drill bit (2) by positioning bolts (8). The mounting seat (7) is fixed with the fixed sleeve (9). The outer end of the fixed sleeve (9) is fixed with the first limiting head (10). The fixed sleeve (9) is connected with the movable sleeve (12). One end of the movable sleeve (12) is fixed with the second limiting head (11). The other end of the movable sleeve (12) is fixed with the pressing seat (13). The first limiting head (10) is movably sleeved on the outer side of the movable sleeve (12). The second limiting head (11) is movably sleeved on the outer side of the fixed sleeve (9). The fixed sleeve (9) and the movable sleeve (12) form a stable telescopic structure through the first limiting head (10) and the second limiting head (11). Through the stable telescopic movement between the fixed sleeve (9) and the movable sleeve (12), the size of the sleeves on the outer side of the drill shank (1) and the spiral drill bit (2) can be effectively changed, so as to facilitate the cooperation of the drilling work, avoid the influence of the fixed sleeve (9) and the movable sleeve (12) on the normal progress of the drilling work, and also ensure the stable protection effect of the drill shank (1) and the spiral drill bit (2).

[0028] Further, the fixed sleeve (9) is sleeved with a spring (14). One end of the spring (14) is connected with the mounting seat (7), and the other end is connected with the second limiting head (11), so that the fixed sleeve (9) and the movable sleeve (12) are maintained in a stable state of the longest working length through the spring (14), and can be automatically reset after contraction, so as to ensure the normal protection working state of the fixed sleeve (9) and the movable sleeve (12).

[0029] Further, the inner sides of the mounting seat (7), the fixed sleeve (9), the first limiting head (10), the second limiting head (11), the movable sleeve (12) and the pressing seat (13) are provided with rubber pads (15), the mounting seat (7), the fixed sleeve (9), the first limiting head (10), the second limiting head (11), the movable sleeve (12) and the pressing seat (13) are sleeved on the outer sides of the drill shank (1) and the spiral drill bit (2), and the rubber pads (15) are in direct contact with the outer sides of the drill shank (1) and the spiral drill bit (2), the rubber pads (15) are made of hard rubber, which can effectively alleviate the vibration generated by the drill shank (1) and the spiral drill bit (2) during drilling work, thereby reducing the fracture probability of the drill bit.

[0030] Specifically, when using the anti-fracture high-speed steel straight shank twist drill, first, the drill shank (1) of the straight shank twist drill is installed on the lathe, and the limiting pressing block (16) is fixed at a suitable position in the running direction of the straight shank twist drill. The working position of the limiting pressing block (16) can be fixed at a suitable position on the lathe as long as it does not affect the normal work of the lathe. Since the workpiece being drilled on the lathe is in a rotating state, the straight shank twist drill does not rotate, but only moves to position to realize drilling of the workpiece, so the working position of the limiting pressing block (16) is set close to the drilling position of the workpiece and has a certain distance from the workpiece, so as not to affect the drilling and chip removal work,

[0031] After the limiting pressing block (16) is set, the spiral drill bit (2) can pass through the limiting pressing block (16) without affecting the forward movement of the spiral drill bit (2) for drilling work, and the pressing seat (13) on the spiral drill bit (2) will be limited by the limiting pressing block (16) and cannot move forward with the spiral drill bit (2), so that the normal drilling work of the spiral drill bit (2) is not affected by the fixed sleeve (9) and the movable sleeve (12);

[0032] During normal drilling, since the drill shank (1) and the spiral drill bit (2) are fixed in position and do not rotate, the cooling liquid can be introduced into the liquid discharge channel (6) and discharged through the first liquid outlet (4) and the second liquid outlet (5). The cooling liquid can comprehensively cool the spiral drill bit (2) to ensure normal drilling work, and the cutting chips generated during drilling can be discharged along with the cooling liquid, effectively preventing the accumulation of cutting chips from causing the spiral drill bit (2) to break;

[0033] With the drilling work continues to advance, the limiting block (16) is pressed against the pressing seat (13), the fixed sleeve (9) and the movable sleeve (12) are contracted, under the action of the first limiting head (10) and the second limiting head (11), the fixed sleeve (9) and the movable sleeve (12) are guaranteed to be in a stable contraction state, and after the spiral drill bit (2) is withdrawn, the fixed sleeve (9) and the movable sleeve (12) can be automatically elongated under the action of the spring (14), so that the fixed sleeve (9) and the movable sleeve (12) cooperate with the entry and exit of the spiral drill bit (2) to perform stable and comprehensive protection work, since the size of the entire drill bit is relatively long at the beginning of drilling, the drill bit is prone to vibration during drilling, the rubber gasket (15) is sleeved on the outside of the drill bit, which can effectively slow down the vibration of the drill bit itself and reduce the adverse effects of vibration.

[0034] In the above manner, by comprehensively cooling the spiral drill bit (2) and discharging the cutting chips assisted by the cooling liquid, the comprehensive protection of the spiral drill bit (2) by the fixed sleeve (9) and the movable sleeve (12) can effectively reduce the probability of drill bit breakage.

[0035] The above is the use process of the anti-breakage high-speed steel straight shank twist drill, and the contents not described in detail in the specification all belong to the prior art known to those skilled in the art.

[0036] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A breakage-proof high speed steel straight shank twist drill comprising a drill shank (1) and a helical drill tip (2), characterized in that: The drill handle (1) and the spiral drill bit (2) are integrated, and the drill handle (1) and the spiral drill bit (2) are made of high-speed steel material; The center positions of the drill handle (1) and the spiral drill bit (2) are provided with a liquid discharge channel (6), the end positions of the spiral drill bit (2) are provided with a first liquid outlet (4) and a second liquid outlet (5), and the first liquid outlet (4) and the second liquid outlet (5) are communicated with the liquid discharge channel (6). The outer sides of the drill handle (1) and the spiral drill bit (2) are provided with a reinforcing assembly for reinforcing the twist drill.

2. The anti-fracture high speed steel straight shank twist drill according to claim 1, characterized in that: The outer side of the spiral drill bit (2) is provided with a spiral groove (3), the spiral groove (3) is communicated with the second liquid outlet (5), and the spiral groove (3) penetrates the end of the spiral drill bit (2).

3. The anti-fracture high speed steel straight shank twist drill according to claim 1, characterized in that: The first liquid outlet (4) is located in the spiral groove on the spiral drill bit (2), and the position of the first liquid outlet (4) is close to the end of the spiral drill bit (2).

4. The anti-fracture high speed steel straight shank twist drill according to claim 1, characterized in that: The reinforcing assembly comprises a mounting seat (7), a fixed sleeve (9), a first limiting head (10), a second limiting head (11), a movable sleeve (12) and a pressing seat (13), the mounting seat (7) is fixed in position on the drill handle (1) or the spiral drill bit (2) through positioning bolts (8), the mounting seat (7) is fixed with the fixed sleeve (9), the outer end of the fixed sleeve (9) is fixed with the first limiting head (10), the fixed sleeve (9) is connected with the movable sleeve (12), one end of the movable sleeve (12) is fixed with the second limiting head (11), the other end of the movable sleeve (12) is fixed with the pressing seat (13), the first limiting head (10) is movably sleeved on the outer side of the movable sleeve (12), the second limiting head (11) is movably sleeved on the outer side of the fixed sleeve (9), and the fixed sleeve (9) and the movable sleeve (12) constitute a stable telescopic structure through the first limiting head (10) and the second limiting head (11).

5. The anti-fracture high speed steel straight shank twist drill according to claim 4, characterized in that: A spring (14) is sleeved on the fixed sleeve (9), one end of the spring (14) is connected with the mounting seat (7), and the other end of the spring (14) is connected with the second limiting head (11).

6. The anti-fracture high speed steel straight shank twist drill according to claim 5, characterized in that: The inner sides of the mounting seat (7), the fixed sleeve (9), the first limiting head (10), the second limiting head (11), the movable sleeve (12) and the pressing seat (13) are provided with rubber gaskets (15), the mounting seat (7), the fixed sleeve (9), the first limiting head (10), the second limiting head (11), the movable sleeve (12) and the pressing seat (13) are sleeved on the outer sides of the drill handle (1) and the spiral drill bit (2), and the rubber gaskets (15) are in direct contact with the outer sides of the drill handle (1) and the spiral drill bit (2).

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