A carbide gun drill facilitating the discharge of chips

Abstract

This utility model discloses a carbide gun drill for easy chip removal, including a drill shank, an adjusting component inside the drill shank cavity, a drill rod at the bottom of the adjusting component, a drill bit at the bottom of the drill rod, and multiple axially extending discharge grooves on the outer wall of the drill rod. The adjusting component includes a lead screw and a moving cylinder. The lead screw is rotatably connected to the top of the drill shank via a bearing and extends into the inner cavity of the drill shank. The moving cylinder is screwed to the outer wall of the lead screw and fixedly connected to the top of the drill rod. A limiting component is provided inside the drill shank cavity, including a lifting plate and a fixing bar. The lifting plate is fixedly sleeved on the outer wall of the moving cylinder, and a sliding groove is formed on one side of the outer wall of the lifting plate. The fixing bar is fixedly connected to the inner wall of the drill shank, and the sliding groove is sleeved on the outer wall of the fixing bar. This utility model achieves precise adjustment of the drill rod length through the adjusting component, allowing the same gun drill to adapt to the machining needs of holes of different depths. The spiral discharge groove design forms an efficient chip removal mechanism, significantly reducing the risk of chip clogging, reducing machining resistance, and extending tool life.

Description

Technical Field

[0001] This utility model relates to the field of alloy gun drill technology, specifically a carbide gun drill that facilitates the removal of debris. Background Technology

[0002] Carbide gun drills are key tools in deep hole machining, and their performance directly affects machining accuracy, efficiency, and workpiece quality. With the rapid development of high-end manufacturing industries such as aerospace, energy equipment, military, and automobile manufacturing, the requirements for the quality and efficiency of deep hole machining are constantly increasing, prompting continuous innovation in carbide gun drill technology.

[0003] Currently, carbide gun drills on the market mainly consist of three parts: a carbide tip, a steel drill rod, and a shank. Internal cooling channels introduce cutting fluid into the cutting area to cool the tool and flush away chips. However, existing carbide gun drills have several significant shortcomings: First, most carbide gun drills use a fixed structure design, making it impossible to adjust the drill rod length according to different workpieces and machining requirements. This forces companies to equip themselves with various specifications of gun drills, increasing tool costs and inventory management difficulties. Second, fixed-length gun drills limit flexibility when machining holes of different depths, especially when machining holes of varying depths, resulting in poor process adaptability. Third, the chip removal channel design of existing gun drills is not reasonable enough, easily leading to chip blockage during machining, which not only affects machining efficiency but may also cause premature tool wear or breakage.

[0004] Based on the above background, this utility model proposes a carbide gun drill that facilitates chip removal, aiming to solve the technical problems of non-adjustable gun drill length and difficulty in chip removal in the prior art, so as to meet the urgent needs of modern manufacturing industry for efficient, flexible and reliable deep hole machining. Utility Model Content

[0005] The purpose of this invention is to provide a carbide gun drill that facilitates the removal of debris, thereby solving the technical problems of non-adjustable gun drill length and difficulty in debris removal in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A carbide gun drill for easy removal of debris includes a drill shank, an adjustment assembly provided in the inner cavity of the drill shank, a drill rod provided at the bottom end of the adjustment assembly, a drill bit provided at the bottom end of the drill rod, and a plurality of discharge grooves extending along the axial direction of the drill rod provided on the outer wall of the drill rod.

[0008] The adjusting assembly includes a lead screw and a movable cylinder. The lead screw is rotatably connected to the top end of the drill shank via a bearing, and the bottom end of the lead screw extends into the inner cavity of the drill shank. The movable cylinder is screwed onto the outer wall of the lead screw and is fixedly connected to the top end of the drill shank.

[0009] The inner cavity of the drill shank is provided with a limiting component, which includes a lifting plate and a fixing bar. The lifting plate is fixedly sleeved on the outer wall of the moving cylinder. A sliding groove is opened on one side of the outer wall of the lifting plate. The fixing bar is fixedly connected to the inner wall of the drill shank. The sliding groove is sleeved on the outer wall of the fixing bar to restrict the moving cylinder from moving in a straight line.

[0010] Preferably, the adjustment assembly further includes a worm gear, a frame, a worm, and a knob. The worm gear is fixedly sleeved on the outer wall of the lead screw. A frame is provided at the top of the drill shank. A worm is rotatably connected to the right side of the inner cavity of the frame via a bearing. The worm meshes with the worm gear. One end of the worm extends to the left end of the frame and is fixedly connected to the knob.

[0011] Preferably, the outer circumference of the knob is provided with anti-slip grooves.

[0012] Preferably, the inner cavity of the groove and the outer wall of the fixing strip are adapted to fit each other and are both dovetail-shaped.

[0013] Preferably, a limiting plate is provided at the bottom end of the fixing strip, and the width of the limiting plate is greater than the width of the sliding groove, so as to prevent the sliding groove from detaching from the fixing strip.

[0014] Preferably, an internal cooling channel is provided between the drill bit and the drill rod, a coolant inlet communicating with the internal cooling channel is provided inside the drill shank, and a coolant outlet communicating with the internal cooling channel is provided at the front end of the drill bit, for guiding the coolant to the cutting area and assisting in the discharge of chips.

[0015] Preferably, the inlet of the discharge chute is adjacent to the cutting area of ​​the drill bit, and the discharge chute extends along the outer wall of the drill rod to the connection between the drill rod and the moving cylinder.

[0016] Preferably, the drill bit is made of cemented carbide material and has a cutting edge at its front end. The cutting edge is matched with the inlet position of the discharge chute to facilitate the entry of chips generated during the cutting process into the discharge chute.

[0017] Preferably, the discharge chute extends spirally along the drill rod axis; this facilitates the discharge of debris and prevents debris from clogging the discharge channel.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] 1) This utility model achieves precise adjustment of the gun drill length by setting up adjustment and limiting components. Rotating the knob causes the worm to rotate. Since the worm meshes with the worm wheel, when the worm rotates, the worm wheel drives the lead screw to rotate. Under the rotational force of the thread on the outer wall of the lead screw, the rotating cylinder causes the lifting plate to slide downwards in a straight line under the limiting action of the slide groove and the fixed strip. This, in turn, causes the moving cylinder to slide downwards along the drill rod and drill bit, achieving precise adjustment of the length of the drill rod and drill bit. This design allows the same gun drill to adapt to the needs of hole processing at different depths, greatly improving the versatility and adaptability of the tool, and reducing tool costs and inventory management difficulties for enterprises.

[0020] 2) This invention creates a highly efficient chip removal mechanism by opening multiple axially spirally extending discharge grooves on the outer wall of the drill rod, combined with an internal coolant channel system. When the gun drill rotates, the spiral channels formed by the discharge grooves utilize the centrifugal force generated by the drill rod's rotation and the scouring effect of the coolant to quickly remove cutting chips from the borehole. This design significantly reduces the risk of chip clogging, decreases resistance during drilling, extends tool life, and simultaneously improves surface finish and machining efficiency.

[0021] 3) The worm gear and worm wheel transmission mechanism of this utility model has a self-locking effect, which can prevent the moving cylinder from moving unexpectedly after the lead screw is vibrated, ensuring the stability of the drill length during processing and improving processing accuracy and safety. At the same time, the design of the dovetail groove and fixing bar further enhances the limiting effect, ensuring the linear movement of the drill rod during adjustment and avoiding rotational deviation.

[0022] 4) This utility model is reasonably designed, compact in structure and easy to operate. It solves the technical problems of the non-adjustable length of gun drills and the difficulty in chip removal in the prior art, and provides a more efficient and flexible tool solution for deep hole machining. Attached Figure Description

[0023] Figure 1 This is a front sectional view of the present invention;

[0024] Figure 2 This is a schematic diagram of the drill bit structure of this utility model;

[0025] Figure 3 This utility model Figure 2 Enlarged view of point A;

[0026] Figure 4 This is a schematic diagram of the worm gear and worm wheel assembly of this utility model.

[0027] In the diagram: 1. Drill shank; 2. Drill rod; 3. Discharge chute; 4. Drill bit; 5. Lead screw; 6. Worm gear; 7. Moving cylinder; 8. Lifting plate; 9. Slide groove; 10. Fixing strip; 11. Limiting plate; 12. Frame; 13. Worm gear; 14. Knob; 15. Anti-slip groove. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1 to 4 This utility model provides a carbide gun drill that facilitates the removal of debris, including a drill shank 1, an adjustment component in the inner cavity of the drill shank 1, a drill rod 2 at the bottom end of the adjustment component, a drill bit 4 at the bottom end of the drill rod 2, and a plurality of discharge grooves 3 extending axially on the outer wall of the drill rod 2. A limiting component is provided in the inner cavity of the drill shank 1, and the limiting component is fixedly sleeved on the outside of the adjustment component.

[0030] In this embodiment, the adjustment assembly includes a lead screw 5, a movable cylinder 7, a frame 12, a worm gear 13, a knob 14, and a worm wheel 6. The lead screw 5 is rotatably connected to the top of the drill shank 1 via a bearing, and the bottom end of the lead screw 5 extends into the inner cavity of the drill shank 1. The movable cylinder 7 is screwed onto the outer wall of the lead screw 5 and fixedly connected to the top of the drill rod 2. The worm wheel 6 is fixedly sleeved onto the outer wall of the lead screw 5. The top of the drill shank 1 is provided with a frame 12, and the right side of the inner cavity of the frame 12 is rotatably connected to the worm gear 13 via a bearing. The other end of the worm gear 13 extends to the left end of the frame 12 and is fixedly connected to the knob 14. When the operator needs to adjust the length of the drill rod 2, the knob 14 can be rotated. The knob 14 drives the worm gear 13 to rotate. Since the worm gear 13 meshes with the worm wheel 6, the rotation of the worm gear 13 will cause the worm wheel 6 to drive the lead screw 5 to rotate. Under the rotational force of the screw thread on the outer wall of the lead screw 5, the rotation of the lead screw 5 will cause the moving cylinder 7 to drive the lifting plate 8 to slide down or up along a straight line under the limiting action of the slide groove 9 and the fixed bar 10, thereby causing the moving cylinder 7 to drive the drill rod 2 and the drill bit 4 to move down or up, so as to achieve precise adjustment of the length of the drill rod 2 and the drill bit 4.

[0031] In this embodiment, the worm 13 meshes with the worm wheel 6, and the worm 13 and worm wheel 6 have a self-locking effect, which can prevent the moving cylinder 7 from moving up and down after the lead screw 5 is vibrated, thus improving the stability of the device during use. This self-locking characteristic is crucial for ensuring the stability of the drill rod length during processing, especially under high-speed rotation and vibration conditions, and can effectively avoid the decrease in processing accuracy or safety accidents caused by changes in length.

[0032] In this embodiment, the outer circumference of the knob 14 is provided with an anti-slip groove 15, which can prevent the knob 14 from slipping out of the hand when rotating it, thus improving the ease of operation and stability of the device during use. The design of the anti-slip groove 15 takes into account the oil stains and gloves that may exist in the actual working environment, ensuring that precise adjustment can be achieved under various conditions.

[0033] In this embodiment, the limiting component includes a lifting plate 8, a sliding groove 9, and a fixing strip 10. The lifting plate 8 is fixedly sleeved on the outer wall of the moving cylinder 7, the sliding groove 9 is formed on one side of the outer wall of the lifting plate 8, and the fixing strip 10 is fixedly connected to the inner wall of the drill shank 1. The sliding groove 9 is sleeved on the outer wall of the fixing strip 10. When the moving cylinder 7 slides up and down, the limiting component ensures that the moving cylinder 7 always slides in a straight line under the combined action of the sliding groove 9 and the fixing strip 10, preventing it from rotating or deviating, thus ensuring the accuracy of adjustment and the coaxiality of the drill rod.

[0034] In this embodiment, the inner cavity of the slide groove 9 and the outer wall of the fixing strip 10 are fitted together and are both dovetail-shaped, which ensures that one side of the fixing strip 10 is always embedded in the inner cavity of the slide groove 9, improving the stability of the limiting component during use. The dovetail design increases the contact area, improves the load-bearing capacity, and ensures smoothness and accuracy during the sliding process.

[0035] In this embodiment, a limiting plate 11 is provided at the bottom end of the fixing strip 10 to prevent the slide groove 9 from detaching from the outside of the fixing strip 10. The width of the limiting plate 11 is greater than the width of the slide groove 9, ensuring that the slide groove 9 will not completely detach from the fixing strip 10 under any circumstances, thus ensuring the safe use of the device. This design avoids the potential risk of component separation and improves the safety and reliability of the tool.

[0036] In this embodiment, the outer wall of the drill rod 2 is provided with multiple axially extending discharge grooves 3. Preferably, these discharge grooves 3 are spirally arranged around the outer surface of the drill rod 2, extending from near the drill bit 4 to the connection between the drill rod 2 and the moving cylinder 7. The inlet of the discharge groove 3 is adjacent to the cutting area of ​​the drill bit 4, which facilitates the direct entry of chips generated during the cutting process into the discharge groove. When the gun drill rotates to perform drilling operations, the chips generated by cutting are quickly discharged from the borehole along the spiral channel of the discharge groove 3 under the flushing of the coolant.

[0037] The spiral design of the discharge chute 3 fully utilizes the centrifugal force generated by the rotation of the drill rod, allowing chips to be quickly discharged along the spiral channel under the combined action of rotational force and coolant. This design significantly reduces the risk of chip clogging, reduces resistance during drilling, extends tool life, and improves surface finish and machining efficiency.

[0038] In this embodiment, the drill bit 4 is made of cemented carbide material, and its front end is provided with a cutting edge, such as... Figure 2 and Figure 3 As shown, an internal cooling channel is provided between the drill bit 4 and the drill rod 2. The drill shank 1 has a coolant inlet communicating with the internal cooling channel, and the front end of the drill bit 4 has a coolant outlet communicating with the internal cooling channel. The coolant enters the internal cooling channel through the coolant inlet of the drill shank 1, and then sprays out through the coolant outlet at the front end of the drill bit 4, directly flushing the cutting area, improving the cooling effect and assisting in the removal of chips.

[0039] The internal cooling channel and the discharge chute 3 form a collaborative chip removal system. After the coolant is sprayed from the outlet, it not only cools the cutting area but also flushes the chips generated during cutting into the inlet of the discharge chute 3. Subsequently, under the influence of the coolant and the centrifugal force generated by the rotation of the drill rod, the chips are rapidly discharged from the borehole along the spiral discharge chute 3. This design significantly improves chip removal efficiency, reduces resistance during drilling, and effectively prevents chip clogging and tool overheating.

[0040] In practical use, the carbide gun drill of this invention is easy to operate and highly effective. Users can adjust the extension length of the drill rod 2 by rotating knob 14 to adapt to different hole depth requirements. During processing, the internal cooling channel and the discharge groove 3 work together to ensure sufficient cooling of the cutting area while efficiently removing chips, improving processing efficiency and quality.

[0041] Compared to traditional carbide gun drills with fixed lengths and mediocre chip removal performance, this invention has significant advantages:

[0042] First, the adjustable length feature allows a single gun drill to adapt to hole machining needs of different depths, greatly improving the versatility and adaptability of the tool and reducing tool costs and inventory management difficulties for enterprises.

[0043] Secondly, the optimized spiral discharge chute design and the internal cooling system work together to significantly improve chip removal efficiency, reduce machining resistance and tool wear, and extend tool life.

[0044] Finally, the self-locking characteristics of the worm gear and the dovetail-shaped limiting mechanism ensure the stability of the drill rod length and the accuracy of its movement during machining, thereby improving machining precision and safety.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A carbide gun drill for easy removal of debris, comprising a drill shank (1), characterized in that: The inner cavity of the drill shank (1) is provided with an adjustment component, the bottom end of the adjustment component is provided with a drill rod (2), the bottom end of the drill rod (2) is provided with a drill bit (4), and the outer wall of the drill rod (2) is provided with a plurality of discharge grooves (3) extending along the axial direction of the drill rod (2). The adjustment assembly includes a lead screw (5) and a movable cylinder (7). The lead screw (5) is rotatably connected to the top end of the drill shank (1) via a bearing. The bottom end of the lead screw (5) extends into the inner cavity of the drill shank (1). The movable cylinder (7) is screwed onto the outer wall of the lead screw (5) and fixedly connected to the top end of the drill rod (2). The inner cavity of the drill shank (1) is provided with a limiting component, which includes a lifting plate (8) and a fixing strip (10). The lifting plate (8) is fixedly sleeved on the outer wall of the moving cylinder (7). A sliding groove (9) is provided on one side of the outer wall of the lifting plate (8). The fixing strip (10) is fixedly connected to the inner wall of the drill shank (1). The sliding groove (9) is sleeved on the outer wall of the fixing strip (10).

2. A carbide gun drill according to claim 1, characterized in that: The adjustment assembly also includes a worm gear (6), a frame (12), a worm (13), and a knob (14). The worm gear (6) is fixedly sleeved on the outer wall of the lead screw (5). The top of the drill shank (1) is provided with a frame (12). The right side of the inner cavity of the frame (12) is rotatably connected to the worm (13) through a bearing. The worm (13) meshes with the worm gear (6). One end of the worm (13) extends to the left end of the frame (12) and is fixedly connected to the knob (14).

3. A carbide gun drill according to claim 2, characterized in that: The outer circumference of the knob (14) is provided with anti-slip grooves (15).

4. A carbide gun drill according to claim 1, characterized in that: The inner cavity of the groove (9) fits well with the outer wall of the fixing strip (10) and both are dovetail shaped.

5. A carbide gun drill according to claim 1, characterized in that: The bottom end of the fixing strip (10) is provided with a limiting plate (11), the width of the limiting plate (11) is greater than the width of the slide groove (9), and is used to prevent the slide groove (9) from detaching from the fixing strip (10).

6. A carbide gun drill according to claim 1, characterized in that: An internal cooling channel is provided between the drill bit (4) and the drill rod (2). The drill shank (1) is provided with a coolant inlet that communicates with the internal cooling channel. The front end of the drill bit (4) is provided with a coolant outlet that communicates with the internal cooling channel, which is used to guide the coolant to the cutting area and assist in the discharge of chips.

7. A carbide gun drill according to claim 1, characterized in that: The inlet of the discharge trough (3) is adjacent to the cutting area of ​​the drill bit (4), and the discharge trough (3) extends along the outer wall of the drill rod (2) to the connection between the drill rod (2) and the moving cylinder (7).

8. A carbide gun drill according to claim 1, characterized in that: The drill bit (4) is made of cemented carbide and has a cutting edge at its front end. The cutting edge is matched with the inlet position of the discharge groove (3) so that the chips generated during the cutting process can enter the discharge groove (3).

9. A carbide gun drill according to claim 1, characterized in that: The discharge trough (3) extends spirally along the axial direction of the drill rod (2).

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