Guide angle integrally-formed steel plate drill

Abstract

The invention discloses a lead angle integrally-formed steel plate drill which comprises a connecting handle, a chip groove is formed in the outer wall of a spiral drill rod, and a cutting edge is reserved at the position, located on the edge of the chip groove, of the spiral drill rod. The chamfering device has the beneficial effects that the special chamfering seat is additionally arranged between the connecting handle and the spiral drill rod, and the two 120-degree chamfering blades are arranged on the chamfering seat in the direction of the cutting blade of the spiral drill rod, so that when the spiral drill rod is about to completely penetrate through a steel plate, the upper edge of a hole opening is cut in advance, and a required chamfer is directly machined; and meanwhile, when the spiral drill rod retreats from the steel plate, the chamfering blades on the chamfering base can make contact with burrs on the lower edge of a hole opening, due to the fact that the retreating direction is opposite to the drilling direction, the cutting edges can generate upward cutting force on the burrs on the lower edge, and therefore the burrs are cut off and brought out of the hole, and the chamfering effect is achieved. The most headache problem of burrs on the outlet side in the traditional process is solved.

Description

Technical Field

[0001] This invention relates to the field of steel plate drilling technology, and specifically to a steel plate drill with an integrally formed chamfer. Background Technology

[0002] A plate drill is a mechanical tool specifically designed for drilling holes in sheet metal, particularly steel. It is commonly used in industries such as construction, machinery manufacturing, automotive, and shipbuilding for precise hole drilling in steel plates. The design and use of plate drills require high precision because steel plates are hard and have high thermal conductivity; therefore, it is necessary to ensure that drilling accuracy is maintained while also guaranteeing the tool's durability and processing efficiency.

[0003] Existing steel plate drills mainly consist of a connecting shank and a spiral drill bit mounted on the connecting shank. When performing cutting operations on the steel plate drill, the steel plate drill is directly mounted on the drilling machine so that the drill can rotate and cut into the steel plate under the action of the drilling machine, thereby achieving drilling of the steel plate.

[0004] While existing steel plate drills can perform drilling operations on steel plates, they have the following shortcomings in use:

[0005] 1. Limited functionality and cumbersome secondary processing: Traditional drill bits can only drill holes in steel plates. If it is necessary to remove burrs from the hole opening or to chamfer, a chamfering tool must be replaced or other tools must be used for secondary processing. This results in increased processing steps, affected positioning accuracy, and reduced production efficiency.

[0006] 2. Poor hole quality leaves burrs. Due to the plastic deformation of the material, the drill bit will produce a large number of hard annular burrs on the exit side. These burrs not only affect the appearance of the workpiece and assembly safety, but also require additional grinding processes to remove, increasing labor and time costs.

[0007] 3. The retraction process has no finishing effect. When the existing drill bit is withdrawn after drilling, the structural design of its cutting edge determines that it cannot effectively carry out or remove burrs. On the contrary, the retraction process may even aggravate the burr situation due to friction and pulling. Its function is only to withdraw from the hole, and it is powerless to improve the quality of the formed hole. Summary of the Invention

[0008] The purpose of this invention is to provide a bevel-angle integrally formed steel plate drill to solve the above-mentioned problems.

[0009] The present invention achieves the above objectives through the following technical solutions:

[0010] A chamfered integral forming steel plate drill includes a connecting shank, a chamfer seat is installed at the middle of the top of the connecting shank, a spiral drill rod is connected to the top of the chamfer seat, a chip removal groove is formed on the outer wall of the spiral drill rod, a cutting edge is reserved on the spiral drill rod at the edge of the chip removal groove, a cutting groove is formed on the chamfer seat along the direction of the cutting edge on the spiral drill rod, and a chamfering edge is reserved at the edge of the cutting groove.

[0011] Furthermore, the chamfer seat, the auger rod, and the connecting shank are all integrally formed, and an annular groove is reserved at the connection between the chamfer seat and the connecting shank.

[0012] By adopting the above technical solution, the chamfer seat, the spiral drill rod, and the connecting shank are integrated into a single structure, ensuring the overall structural strength of the steel plate drill during use. The groove design avoids stress concentration between the chamfer seat and the connecting shank.

[0013] Furthermore, the chamfered seat has a conical structure on the side facing the auger rod.

[0014] By adopting the above technical solution, the conical structure on the chamfering seat can be conveniently used to machine the chamfer at the port of the machining hole on the steel plate.

[0015] Furthermore, the included angle of the cutting groove is 120°, and the cutting edge of the chamfering edge and the surface of the cutting edge of the cutting edge are both coated with titanium nitride hard coating.

[0016] By adopting the above technical solution, the chamfering edge and the cutting edge treated with titanium nitride hard coating have better wear resistance and will not easily wear out.

[0017] Furthermore, the cutting edge has a short-edge structure, there are two cutting edges, and the two cutting edges are respectively located on both sides of the chamfer seat.

[0018] By adopting the above technical solution, the cutting edge of the short-blade structure can effectively break the chips and prevent long chips from being brought out and entangled in the spiral drill rod when the tool is retracted.

[0019] Furthermore, the cutting groove corresponds one-to-one with the cutting edge, and the cutting groove is connected to the chip removal groove.

[0020] By adopting the above technical solution, the cutting groove is connected to the chip removal groove, which can ensure the convenient removal of chips during drilling.

[0021] Furthermore, the auger drill rod is made of ultra-hard high-speed steel, and the chamfer seat is made of high-toughness alloy steel.

[0022] By adopting the above technical solutions, the materials of the auger drill rod and the chamfer seat are differentiated, which can control costs while ensuring overall performance.

[0023] Furthermore, the connecting handle is generally cylindrical and is made of tool steel.

[0024] By adopting the above technical solution, the connecting shank made of tool steel can withstand a large torque, ensuring that the spiral drill rod rotates synchronously with the steel plate drill mounting base, so as to realize the drilling of the steel plate.

[0025] Furthermore, a limiting groove is provided on the outer side wall of the connecting handle to enable the connecting handle to be installed on the drill bit mounting seat.

[0026] By adopting the above technical solution, the limiting groove mainly cooperates with the limiting bolts on the steel plate drill mounting base, thereby realizing the reliable limiting of the steel plate drill after it is installed on the drilling machine.

[0027] Furthermore, a positioning hole is also installed at the center of the bottom end of the connecting handle.

[0028] By adopting the above technical solution, the positioning hole mainly cooperates with the positioning post on a steel plate drill mounting base to achieve the positioning of the connecting handle after insertion.

[0029] The specific working principle is as follows: When drilling a steel plate, the connecting shank on the spiral drill rod is first inserted into the corresponding steel plate drill mounting seat on the drilling machine. The connecting shank is reliably positioned after insertion by the limiting bolts at the steel plate drill mounting seat. Then, the spiral drill bit is simply rotated into the steel plate under the action of the drilling machine, thus drilling the steel plate simultaneously. During the drilling process using this steel plate drill, a special chamfering seat is installed between the connecting shank and the spiral drill rod. Two 120° chamfering edges are formed on the chamfering seat along the cutting edge direction of the spiral drill rod. Just as the spiral drill rod is about to completely penetrate the steel plate, the upper edge of the hole is pre-cut, directly creating the required chamfer. This replaces the previous method... The subsequent separate chamfering process, along with the chamfering edge on the chamfering seat contacting the burrs at the lower edge of the hole when the auger rod withdraws from the steel plate, creates an upward cutting force on the burrs as the withdrawal direction is opposite to the drilling direction. This cuts off the burrs and "brings" them out of the hole, solving the problem of exit-side burrs, which is the most troublesome issue in traditional processes. Because this type of steel plate drill integrates the "chamfering" and "deburring" functions into the drilling process, the key is that the chamfering edge on the chamfering seat not only completes the chamfering of the upper edge of the hole at the end of drilling, but also uses its unique geometric angle to reverse-cut the burrs at the lower edge of the hole during the auger rod withdrawal stage. This achieves the integrated effect of "chamfering upon entry and deburring upon exit," completely avoiding secondary processing.

[0030] The beneficial effects of this invention are as follows:

[0031] This invention adds a dedicated chamfering seat between the connecting shank and the auger drill rod, and creates two 120° chamfering edges on the chamfering seat along the cutting edge direction of the auger drill rod. This allows for pre-cutting of the upper edge of the borehole when the auger drill rod is about to completely penetrate the steel plate, directly machining the required chamfer. This replaces the subsequent separate chamfering process. Simultaneously, when the auger drill rod exits the steel plate, the chamfering edges on the chamfering seat contact the burrs on the lower edge of the borehole. Since the exit direction is opposite to the drilling direction, these cutting edges create an upward cutting motion against the lower edge burrs. The cutting force cuts off the burrs and "brings them out" of the hole, solving the problem of exit-side burrs, which is the most troublesome problem in traditional processes. Because this type of steel plate drill integrates the "chamfering" and "deburring" functions into the drilling process, the key is that the chamfering edge on the chamfering seat not only completes the chamfering of the upper edge of the hole at the end of the drilling, but also uses its unique geometric angle to reverse cut the burrs on the lower edge of the hole during the auger rod withdrawal stage. This achieves the integrated effect of "chamfering before drilling and deburring after drilling", completely avoiding secondary processing. Attached Figure Description

[0032] Figure 1This is a schematic diagram of the structure of a bevel-angle integrally formed steel plate drill according to the present invention.

[0033] The annotations in the attached figures are explained as follows:

[0034] 1. Spiral drill rod; 2. Chamfering edge; 3. Cutting groove; 4. Chamfering seat; 5. Connecting shank; 6. Positioning hole; 7. Limiting groove; 8. Groove; 9. Chip removal groove; 10. Cutting edge. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings:

[0036] like Figure 1 As shown, a chamfered steel plate drill includes a connecting shank 5. A chamfering seat 4 is installed at the center of the top of the connecting shank 5. The chamfering seat 4 can chamfer the end of the hole on the steel plate while drilling. A spiral drill rod 1 is connected to the top of the chamfering seat 4. The spiral drill rod 1 is the main structure for drilling the steel plate. A chip removal groove 9 is provided on the outer wall of the spiral drill rod 1. The chip removal groove 9 is mainly used to conveniently remove chips during the drilling process. A cutting edge 10 is reserved on the spiral drill rod 1 at the edge of the chip removal groove 9. The cutting edge 10 is the main cutting structure on the spiral drill rod 1. A cutting groove 3 is provided on the chamfering seat 4 along the direction of the cutting edge 10 on the spiral drill rod 1. A chamfering edge 2 is reserved at the edge of the cutting groove 3. The chamfering edge 2 cooperates with the cutting groove 3 to conveniently remove burrs at the end of the hole on the steel plate.

[0037] In this embodiment, the chamfer seat 4, the spiral drill rod 1, and the connecting handle 5 are all integrally formed. The connection between the chamfer seat 4 and the connecting handle 5 is also provided with an annular groove 8, so that the chamfer seat 4, the spiral drill rod 1, and the connecting handle 5 are integrated into a single structure. This ensures the overall structural strength of the steel plate drill during use. The design of the groove 8 avoids the stress concentration problem between the chamfer seat 4 and the connecting handle 5.

[0038] In this embodiment, the chamfering seat 4 has a conical structure on the side facing the spiral drill rod 1. The conical structure on the chamfering seat 4 can facilitate the machining of a conical chamfer at the port of the machining hole on the steel plate.

[0039] In this embodiment, the included angle of the cutting groove 3 is 120°, and the cutting edges of the chamfering edge 2 and the cutting edge 10 are both coated with titanium nitride hard coating. The chamfering edge 2 and the cutting edge 10 treated with titanium nitride hard coating have better wear resistance and will not wear easily.

[0040] In this embodiment, the cutting edge 10 has a short-edge structure, and there are two cutting edges 10, which are located on both sides of the chamfer seat 4. The short-edge structure of the cutting edge 10 can effectively break the chips and prevent long chips from being brought out and entangled in the spiral drill rod 1 when the tool is retracted.

[0041] In this embodiment, the cutting groove 3 corresponds one-to-one with the cutting edge 10, and the cutting groove 3 is connected to the chip removal groove 9. The connection between the cutting groove 3 and the chip removal groove 9 can ensure convenient chip removal during drilling.

[0042] In this embodiment, the spiral drill rod 1 is made of ultra-hard high-speed steel, and the chamfer seat 4 is made of high-toughness alloy steel. The material difference between the spiral drill rod 1 and the chamfer seat 4 can control costs while ensuring overall performance.

[0043] In this embodiment, the connecting handle 5 is a cylindrical structure and is made of tool steel. The tool steel connecting handle 5 can withstand a large torque, ensuring that the spiral drill rod 1 rotates synchronously with the steel plate drill mounting base to achieve drilling of the steel plate.

[0044] In this embodiment, a limiting groove 7 is also provided on the outer side wall of the connecting handle 5 for installing the connecting handle 5 on the drill bit mounting seat. The limiting groove 7 mainly cooperates with the limiting bolt on the plate drill mounting seat to achieve reliable positioning of the plate drill after it is installed on the drill rig.

[0045] In this embodiment, a positioning hole 6 is also installed at the bottom center of the connecting handle 5. The positioning hole 6 mainly cooperates with the positioning post on a steel plate drill mounting base to achieve the positioning of the connecting handle 5 after insertion.

[0046] The specific working principle is as follows: When drilling a steel plate, the connecting shank 5 on the spiral drill rod 1 is first inserted into the corresponding steel plate drill mounting seat on the drilling machine. The connecting shank 5 is reliably limited after insertion by the limiting bolts at the steel plate drill mounting seat on the drilling machine. Then, the spiral drill bit is simply rotated into the steel plate under the action of the drilling machine, thus drilling the steel plate simultaneously. During the drilling process using this steel plate drill, a dedicated chamfering seat 4 is installed between the connecting shank 5 and the spiral drill rod 1. Two 120° chamfering edges 2 are formed on the chamfering seat 4 along the cutting edge 10 direction of the spiral drill rod 1. Just as the spiral drill rod 1 is about to completely penetrate the steel plate, the upper edge of the hole is pre-cut to directly produce the required chamfer. This replaces the subsequent separate chamfering process. When the auger rod 1 exits the steel plate, the chamfering edge 2 on the chamfering seat 4 comes into contact with the burrs on the lower edge of the hole. Since the exit direction is opposite to the drilling direction, these edges will generate an upward cutting force on the lower edge burrs, thereby cutting off the burrs and "carrying" them out of the hole. This solves the most troublesome exit-side burr problem in traditional processes. Because this type of steel plate drill integrates the "chamfering" and "deburring" functions in advance into the drilling process, the key is that the chamfering edge 2 on the chamfering seat 4 not only completes the chamfering of the upper edge of the hole at the end of the drilling, but also uses its unique geometric angle to reverse-cut the burrs on the lower edge of the hole during the exit stage of the auger rod 1. This achieves the integrated effect of "chamfering upon entry and deburring upon exit", completely avoiding secondary processing.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A chamfered integral forming steel plate drill, characterized in that: The device includes a connecting handle (5), a chamfer seat (4) is installed at the middle of the top of the connecting handle (5), a spiral drill rod (1) is connected to the top of the chamfer seat (4), a chip removal groove (9) is provided on the outer wall of the spiral drill rod (1), a cutting edge (10) is reserved on the edge of the chip removal groove (9) on the spiral drill rod (1), a cutting groove (3) is provided on the chamfer seat (4) along the direction of the cutting edge (10) on the spiral drill rod (1), and a chamfering edge (2) is reserved on the edge of the cutting groove (3).

2. The bevel-angle integral forming steel plate drill according to claim 1, characterized in that: The chamfer seat (4), the spiral drill rod (1), and the connecting handle (5) are all integrally formed. The chamfer seat (4) and the connecting handle (5) are also provided with an annular groove (8).

3. The bevel-angle integral forming steel plate drill according to claim 1, characterized in that: The chamfered seat (4) has a conical structure on the side facing the auger rod (1).

4. The chamfered integral forming steel plate drill according to claim 1, characterized in that: The included angle of the cutting groove (3) is 120°, and the cutting edge of the chamfering edge (2) and the cutting edge surface of the cutting edge (10) are both coated with titanium nitride hard coating.

5. A chamfered integral forming steel plate drill according to claim 4, characterized in that: The cutting edge (10) is a short-blade structure, and there are two cutting edges (10), which are located on both sides of the chamfer seat (4).

6. A chamfered integral forming steel plate drill according to claim 5, characterized in that: The cutting groove (3) corresponds one-to-one with the cutting edge (10), and the cutting groove (3) is connected to the chip removal groove (9).

7. A chamfered integral forming steel plate drill according to claim 1, characterized in that: The spiral drill rod (1) is made of ultra-hard high-speed steel, and the chamfer seat (4) is made of high-toughness alloy steel.

8. A chamfered integral forming steel plate drill according to claim 1, characterized in that: The connecting handle (5) is cylindrical in shape and is made of tool steel.

9. A chamfered integral forming steel plate drill according to claim 1, characterized in that: The connecting handle (5) is also provided with a limiting groove (7) on its outer side wall for mounting the connecting handle (5) on the drill bit mounting seat.

10. A chamfered integral forming steel plate drill according to claim 9, characterized in that: A positioning hole (6) is also installed at the bottom center of the connecting handle (5).

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