Fork-shaped hinge hole punching cutter capable of rapidly discharging chips

Abstract

The utility model relates to the field of woodworking tools. The fork-shaped hinge hole punching cutter capable of rapidly discharging chips comprises a cutter handle and a cutter body arranged at one end of the cutter handle, and three fork-shaped drilling parts and three chip discharging grooves with spiral faces are distributed on the cutter body in a staggered mode. At least one chip breaking guide groove is formed in the spiral face of the chip groove in the spiral direction of the spiral face. According to the wood chip removal device, wood chips drilled from a plate can be rapidly guided to be discharged from the chip removal groove, meanwhile, large wood chips can be broken, and the chip removal smoothness is improved.

Description

Technical Field

[0001] The utility model relates to the field of woodworking tools, in particular to a hole drill. Background Art

[0002] A woodworking drill bit (hole drill) is a tool used in the wood processing industry to make holes in wood. Depending on the type of drill bit, it usually includes a row drill, a split drill, etc., and is generally installed on a six-sided drill, a bench drill, and other equipment for use. At present, the most commonly used cabinet door hinges on the market use a φ35mm installation hole, and manufacturers generally choose a φ35mm split drill for drilling. The drill bit usually includes a shank and a disc-shaped cutter body arranged at the front end. The cutter body is milled to form three fork-shaped branches. The front end face of each fork-shaped branch in the direction of rotation is provided with a main blade A to play the main drilling role; a chip removal groove with a spiral surface is formed between two adjacent branches. A scribing blade B is provided on the outer circumference of each fork-shaped branch, which is mainly used to scribing the cutting contour range on the circumference to ensure the smoothness of the hole wall, and the main blade is used to cut and remove the material within the range.

[0003] However, in the actual processing, for some veneer particleboards, this three-edged drill bit (three forked branches) still has edge bursting at the edge of the hole when opening holes at a higher speed, despite the presence of the scoring blade. Even if the sharpness of the scoring blade is increased, it cannot avoid this situation. Operators usually use two ways to solve this problem: 1. Use a two-edged drill bit, which can alleviate this edge bursting situation, but since the two-edged drill bit has only two groups of working edges, compared with the three-edged drill bit, it has one less group of working edges to share the cutting workload, so its service life is much shorter than that of the three-edged drill bit. 2. This situation can also be alleviated by reducing the spindle speed, but the reduced speed means a decrease in processing efficiency, which has a certain impact on production.

[0004] After detailed research, we found that this phenomenon is mainly caused by the three-edge structure. The chip removal grooves between the forked branches are relatively narrow. During high-speed drilling, wood chips cannot be discharged in time. The wood chips cause greater friction and extrusion on the hole wall under high-speed rotation, resulting in edge bursting. Therefore, how to improve the chip removal performance of three-edge drill bits has become a key issue in this field. Summary of the invention

[0005] The utility model aims to provide a fork-shaped hinge hole opening cutter with fast chip removal, which can quickly guide the wood chips in the hole to be discharged, thus greatly alleviating the problem of hole wall cracking.

[0006] In order to achieve the above-mentioned invention object, the technical solution adopted by the utility model is: a fork-shaped hinge hole punching tool with fast chip removal, comprising a tool handle and a tool body arranged at one end of the tool handle, wherein three fork-shaped drilling parts and three chip removal grooves with spiral surfaces are staggeredly distributed on the tool body;

[0007] At least one chip breaking guide groove is arranged on the helical surface of the chip removal groove along the helical direction of the helical surface.

[0008] Preferably, the cross section of the chip breaking guide groove is semicircular.

[0009] Preferably, two chip breaking guide grooves are arranged on the spiral surface of each chip removal groove.

[0010] Preferably, a plurality of chip breaking notches are provided on the groove walls on both sides of the chip breaking guide groove.

[0011] Preferably, a chip removal and boosting ring is provided on the tool handle near the tool body, and the chip removal and boosting ring comprises a ring body which cooperates with the tool handle and is fixedly sleeved on the outside of the tool handle; the outer wall of the ring body is in a ring shape and has a number of triangular boosting fan blades evenly distributed thereon; the surface of the boosting fan blade close to one side of the tool body is a convex inclined surface, and the other side is a flat surface.

[0012] Preferably, a shoulder is provided at one end of the tool handle close to the tool body, and a plurality of positioning recesses are provided on the shoulder; a positioning convex portion matching with the positioning recesses is provided on the end face of the ring body; the positioning convex portion of the ring body is clamped in the positioning recess of the shoulder, and the ring body is pressed against the shoulder by a pressing cap; the pressing cap is threadedly connected to the tool handle.

[0013] The beneficial effects of the utility model are mainly reflected in that the wood chips drilled from the plate can be quickly guided to be discharged from the chip discharge groove, and at the same time, the larger wood chips can be broken, thereby improving the smoothness of chip discharge. Specifically, the utility model can further improve the performance of the spiral surface in guiding the discharge of wood chips during the high-speed rotation of the cutter body by setting a chip breaking guide groove on the spiral surface. At the same time, the chip breaking guide groove can also break up some relatively large wood chips, thereby making it easier to discharge the wood chips, greatly improving the chip discharge performance of the three-edge drill bit, and truly giving play to the advantages of the three-edge drill bit over the two-edge drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the knife body;

[0016] Figure 3 It is a structural schematic diagram of a preferred embodiment of the knife body;

[0017] Figure 4This is a schematic diagram of the installation structure of the chip removal booster ring;

[0018] Figure 5 It is a top view of the chip removal booster ring;

[0019] Figure 6 for Figure 5 CC view of the structure shown in . DETAILED DESCRIPTION

[0020] like Figure 1-6 The fork-shaped hinge hole punching tool with fast chip removal is essentially a three-edged split drill, which is mainly used for punching hinge holes in wooden door panels. It includes a handle 1 and a tool body 2 arranged at one end of the handle 1. The tool body 2 is staggered with three fork-shaped drilling parts and three chip grooves 4 with spiral surfaces 3. The improvement of the utility model is mainly aimed at three-edged drills. Due to the large size of the chip groove of the two-edged drill, the above-mentioned problem does not exist at a normal rotation speed.

[0021] like Figure 2 As shown in the figure, the main blade A of the utility model generally adopts an integrated three-pronged structure, with a center tip for positioning in the middle, and a scribing blade B is arranged on the peripheral edge of the drilling part, which can also be called a scribing blade. Each blade can be made of diamond material or hard alloy material, such as tungsten steel alloy.

[0022] The biggest feature of this utility model is that Figure 2 As shown in the figure, at least one chip-breaking guide groove 5 is arranged on the spiral surface 3 of the chip removal groove 4 along the spiral direction of the spiral surface 3. The cross section of the chip-breaking guide groove 5 is usually semicircular. Of course, square is also feasible, but the overall guiding smoothness of the semicircle is better. The width of the chip-breaking guide groove 5 itself should not be too large, so as not to affect the overall smoothness of the spiral surface. It is generally between 1-3 mm, and the number is usually set to two.

[0023] The utility model provides a chip-breaking guide groove 5 on the spiral surface 3, so that the performance of the spiral surface 3 in guiding the discharge of wood chips can be further improved during the high-speed rotation of the cutter body 1. At the same time, the notch of the chip-breaking guide groove 5 is generally a relatively sharp part, which can also break some relatively large wood chips, thereby making the discharge of wood chips easier, greatly improving the chip discharge performance of the three-edge drill bit, and truly giving play to the advantages of the three-edge drill bit over the two-edge drill bit.

[0024] Of course, in order to further improve the chip breaking performance of the chip breaking guide groove 5 on the wood chips, Figure 3 As shown in , a plurality of chip breaking notches 6 may be further provided on the groove walls on both sides of the chip breaking guide groove 5. The chip breaking notches 6 can further enhance the breaking property of the wood chips, thereby making the volume of individual wood chips smaller, facilitating the discharge of the chips and preventing chip jamming.

[0025] On this basis, in order to further improve the ability to discharge small wood chips, the utility model can also be provided with a chip discharge booster ring 7 on the handle 1 near the cutter body 2. The chip discharge booster ring 7 is usually made of hard rubber and can be installed on the drill bit. As the name suggests, the chip discharge booster ring 7 can increase the chip discharge pressure difference, so that the broken small wood chips can be drawn and discharged better. Figure 4-6 As shown in the figure, the chip removal and boosting ring 7 includes a ring body 8 which cooperates with the tool handle 1 and is fixedly sleeved outside the tool handle 1. The outer wall of the ring body 8 is annular and evenly distributed with a number of triangular boosting fan blades 9. Figure 5 The number of the middle booster blades 9 is 4, which can be more or less in specific production. The surface of the booster blade 9 close to the blade body 2 is a convex inclined surface, and the other side is a plane.

[0026] With such a design, the chip removal booster ring 7 can rotate rapidly with the drill bit. During the rotation, due to the special shape of the booster fan 9, the airflow above and below the booster fan 9 have a significant difference in flow rate, so that a significant upward airflow is formed at the chip removal booster ring 7 (with a Figure 4 It should be noted that when the volume of the sawdust is large, the pumping performance is not obvious, so its function is also closely related to the breaking performance of the sawdust by the aforementioned chip breaking guide groove 5.

[0027] Regarding the specific installation form of the chip removal booster ring 7 of the utility model, combined with Figure 1 and 4 As shown in the figure, the end of the handle 1 close to the blade body 2 is provided with a shoulder 10, and the shoulder 10 is provided with a plurality of positioning recesses, and the end surface of the ring body 8 is provided with a positioning convex portion 11 that matches the positioning recesses. The positioning convex portion 11 of the ring body 8 is clamped in the positioning recess of the shoulder 10, and the ring body 8 is pressed against the shoulder 10 by a pressing cap 12, and the pressing cap 12 is threadedly connected to the handle 1.

Claims

1. A fork-shaped hinge hole punching tool with fast chip removal, comprising a tool handle (1) and a tool body (2) arranged at one end of the tool handle (1), wherein the tool body (2) is staggeredly provided with three fork-shaped drilling portions and three chip removal grooves (4) with spiral surfaces (3); Features: At least one chip breaking guide groove (5) is arranged on the helical surface (3) of the chip removal groove (4) along the helical direction of the helical surface (3).

2. The fork-shaped hinge hole punch with rapid chip removal according to claim 1, characterized in that: The cross section of the chip breaking guide groove (5) is semicircular.

3. The fork-shaped hinge hole punch with rapid chip removal according to claim 2, characterized in that: Two chip-breaking guide grooves (5) are arranged on the spiral surface (3) of each chip removal groove (4).

4. The fork-shaped hinge hole punch with rapid chip removal according to claim 3, characterized in that: A plurality of chip breaking notches (6) are provided on the groove walls on both sides of the chip breaking guide groove (5).

5. The fork-shaped hinge hole punch with rapid chip removal according to claim 4, characterized in that: A chip removal booster ring (7) is arranged on the tool handle (1) near the tool body (2), and the chip removal booster ring (7) comprises a ring body (8) which cooperates with the tool handle (1) and is fixedly sleeved outside the tool handle (1); the outer wall of the ring body (8) is annular and has a plurality of triangular booster blades (9) evenly distributed thereon; the surface of the booster blade (9) on one side close to the tool body (2) is a convex inclined surface, and the other side is a flat surface.

6. The fork-shaped hinge hole punch with rapid chip removal according to claim 5, characterized in that: A shoulder (10) is provided at one end of the tool handle (1) close to the tool body (2); a plurality of positioning recesses are provided on the shoulder (10); a positioning protrusion (11) matching with the positioning recess is provided on the end surface of the ring body (8); the positioning protrusion (11) of the ring body (8) is clamped in the positioning recess of the shoulder (10), and the ring body (8) is pressed onto the shoulder (10) by a pressing cap (12); the pressing cap (12) is threadedly connected to the tool handle (1).

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