Indexable drilling, countersinking and chamfering composite drill

Abstract

An indexable drilling, countersinking and chamfering composite drill comprises a drill bit, a countersinking cutter and a cutter handle which are sequentially and coaxially arranged from front to back, an inner blade and an outer blade are arranged on the drill bit, two drill bit spiral grooves are formed in the drill bit in the circumferential direction, the inner blade is detachably fixed in one drill bit spiral groove, and the outer blade is detachably fixed in the other drill bit spiral groove. Cutting edges on the inner sides of the tops of the inner blades and cutting edges on the inner sides of the tops of the outer blades are higher than the front end face of the drill bit; cutting edges on the outer sides of the tops of the outer blades extend out of the corresponding drill bit spiral grooves; a chamfering blade and a countersink blade are arranged on the countersink, a chamfering spiral groove and a countersink spiral groove are formed in the circumferential direction of the countersink, the chamfering blade is detachably fixed in the chamfering spiral groove, a cutting edge at the top of the chamfering blade is higher than the front end face of the countersink, and the countersink blade is detachably fixed in the countersink spiral groove. A cutting edge on the outer side of the top of the countersink blade extends out of the countersink spiral groove. According to the utility model, drilling, counter sinking and chamfering operations can be conveniently and synchronously carried out.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile parts machining, and specifically relates to a compound drill for drilling, counter sinking and chamfering with indexable. BACKGROUND

[0002] During the machining of some automobile parts, drilling, counter sinking and chamfering operations are often performed on corresponding parts, such as automobile exhaust manifolds. Drilling, counter sinking and chamfering are generally completed by three types of tools. During the machining process, the tools need to be frequently replaced, and the tools need to be re-adjusted after installation. The process is complicated, and the machining efficiency is low. Therefore, some compound tools are used, i.e., multiple tools are arranged on the same tool shank to improve the working efficiency.

[0003] For example, the patent with the publication number CN214023663U and the patent name "an integrated PCD drill and counter sink compound tool for machining aviation composite materials" discloses a technical solution including a drill bit, a counter sink tool, a tool shank and a positioning rod arranged coaxially. The drill bit and the counter sink tool are combined on one tool. During the machining process, the original two processes are combined into one process. However, the drill bit is fixedly connected to the cutting end of the counter sink tool. The counter sink tool includes a tool body and a counter sink tool blade. The counter sink tool blade is welded in a groove on the tool body. During use, when the drill bit or the counter sink tool is worn, the entire tool needs to be replaced, which is costly. UTILITY MODEL CONTENT

[0004] The utility model aims to provide a compound drill for drilling, counter sinking and chamfering with indexable, which facilitates synchronous drilling, counter sinking and chamfering operations, improves the working efficiency, and facilitates replacement of corresponding blades according to needs, thereby saving costs.

[0005] The utility model adopts the technical scheme of:

[0006] The utility model provides a kind of indexable drill and countersink chamfer composite drill, including drill, countersink and shank which are coaxially arranged in order from front to back, drill, countersink and shank are integrally designed, the diameter of countersink is greater than the diameter of drill and the diameter of shank, drill is equipped with inner blade and outer blade, drill is equipped with two drill helical grooves, inner blade is detachably fixed in one of drill helical grooves, outer blade is detachably fixed in another drill helical groove, the blade of inner blade top inner side and the blade of outer blade top inner side are all higher than the front end surface of drill, the blade of outer blade top outer side extends to the outside of corresponding drill helical groove, inner blade and outer blade cooperate drilling hole, efficiency is higher, the center of drill is located in the blade of inner blade rotary range, when drilling, it is convenient to drill through the central part of workpiece;Countersink is equipped with chamfer blade and countersink blade, countersink is equipped with chamfer helical groove and countersink helical groove, preferably, two chamfer helical grooves and two countersink helical grooves are arranged in the circumference of countersink, chamfer helical groove is arranged with interval with countersink helical groove, chamfer blade is detachably fixed in chamfer helical groove, one blade of chamfer blade top is higher than the front end surface of countersink, for chamfering operation to the top of hole, countersink blade is detachably fixed in countersink helical groove, the blade of countersink blade top outer side extends to the outside of countersink helical groove, for countersinking operation to the top of hole, the blade of chamfer blade top is higher than the blade of countersink blade top;The blade rotary diameter of inner blade, outer blade, chamfer blade and countersink blade increases in turn.

[0007] Further, one side of drill helical groove is equipped with first helical surface, the other side of drill helical groove is equipped with first vertical surface;The top inner side of the first vertical surface of one of drill helical groove is equipped with inner blade installation groove, the top of inner blade installation groove is open, inner blade is detachably fixed in inner blade installation groove, the blade of inner blade top inner side extends from the top of inner blade installation groove to the outside of inner blade installation groove, when installing, inner blade is slightly inclined, the inner side of inner blade bottom has interval with the bottom of inner blade installation groove, the outer side of inner blade bottom contacts with the bottom of inner blade installation groove, the corresponding part of inner blade side surface is pasted with the corresponding part of inner blade installation groove inner wall, so that the blade of inner blade top inner side extends straight to the outside of inner blade installation groove and is higher than the front end surface of drill, the top outer side of the first vertical surface of another drill helical groove is equipped with outer blade installation groove, the top and outer side of outer blade installation groove are open, outer blade is detachably fixed in outer blade installation groove, the blade of outer blade top inner side extends from the top of outer blade installation groove to the outside of outer blade installation groove, the blade of outer blade top outer side extends from the outside of outer blade installation groove to the outside of outer blade installation groove, similarly, when installing, outer blade is slightly inclined, the inner side of outer blade bottom has interval with the bottom of outer blade installation groove, the outer side of outer blade bottom contacts with the bottom of outer blade installation groove, the corresponding part of outer blade side surface is pasted with the corresponding part of outer blade installation groove inner wall, so that the blade of outer blade top inner side extends straight to the outside of outer blade installation groove and is higher than the front end surface of drill.

[0008] Furthermore, a second spiral surface is provided on one side of the chamfered spiral groove, and a second vertical surface is provided on the other side of the chamfered spiral groove. The inner side of the second vertical surface extends to the bottom of the drill bit, and a chamfering insert mounting groove is provided on the inner side of the second vertical surface. The chamfering insert can be detachably fixed in the chamfering insert mounting groove. The top of the countersink is provided with a notch that communicates with the chamfering insert mounting groove. One cutting edge of the top of the chamfering insert extends out of the notch. The cutting edge of the chamfering insert is vertically upward, extends out of the notch and corresponds to the bottom of the drill bit, which facilitates chamfering of the hole.

[0009] Furthermore, a third helical surface is provided on one side of the countersink spiral groove, and a third vertical surface is provided on the other side of the chamfered spiral groove. A countersink blade mounting groove is provided at the top of the third vertical surface. The countersink blade can be detachably fixed in the countersink blade mounting groove. The top and outer sides of the countersink blade mounting groove are open, and the cutting edge of the top outer side of the countersink blade extends to the outside of the countersink blade mounting groove.

[0010] Furthermore, the inner blade, outer blade, chamfering blade, and countersink blade have the same structure and are all regular square frustum structures. The base and top surfaces of the regular square frustum are both squares with different side lengths. The identical structure of the four types of blades facilitates material management and saves costs. All four circumferential edges of the regular square frustum are cutting edges. When one cutting edge wears down, the regular square frustum can be rotated 90° to use another cutting edge, resulting in high utilization.

[0011] Furthermore, the central part of the square truncated pyramid is provided with a mounting hole, a mounting bolt is provided in the mounting hole, a tapered countersunk hole is provided at the outer end of the mounting hole, and the head of the mounting bolt is provided with a tapered part that mates with the tapered countersunk hole.

[0012] Furthermore, the tool holder is provided with a main water inlet channel, the bottom of which extends to the bottom of the tool holder and the top of which extends into the drill bit; both the drill bit spiral groove and the countersink spiral groove are provided with water outlets, and both the drill bit and the countersink are provided with side water inlet channels corresponding to the water outlets. The side water inlet channels are connected to the main water inlet channel, and coolant is transported through the main water inlet channel and the side water inlet channels to facilitate drilling and countersinking operations.

[0013] The beneficial effects of this utility model are:

[0014] (1) The drill bit, countersink, and tool holder are arranged coaxially from front to back. The drill bit is equipped with an inner blade and an outer blade. The inner blade and the outer blade work together to drill holes, which is more efficient. The countersink is equipped with a chamfering blade and a countersinking blade, which facilitates simultaneous drilling, countersinking, and chamfering operations, thereby improving work efficiency.

[0015] (2) The inner blade is detachably fixed in one of the drill bit helical grooves, the outer blade is detachably fixed in another drill bit helical groove, the chamfer blade is detachably fixed in the chamfer helical groove, and the reamer blade is detachably fixed in the reamer helical groove, so that the blades are convenient to install and detach, the corresponding blades can be replaced according to needs, and cost is saved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0017] Figure 2 It is a front view structure schematic view (one) of the utility model;

[0018] Figure 3 It is a front view structure schematic view (two) of the utility model;

[0019] Figure 4 It is a top view structure schematic view of the utility model;

[0020] Figure 5 It is a local structure schematic view (one) of the utility model;

[0021] Figure 6 It is a local structure schematic view (two) of the utility model

[0022] Figure 7 It is a local structure schematic view (three) of the utility model;

[0023] Figure 8 It is a structure schematic view of the inner blade;

[0024] Figure 9 It is a structure schematic view of the mounting bolt.

[0025] In the drawing: 1-blade handle, 2-reamer, 3-chamfer helical groove, 4-second helical surface, 5-second vertical surface, 6-notch, 7-chamfer blade, 8-drill bit, 9-chamfer blade mounting groove, 10-inner blade mounting groove, 11-inner blade, 12-blade edge, 13-outer blade mounting groove, 14-outer blade, 15-mounting bolt, 16-water outlet, 17-first vertical surface, 18-first helical surface, 19-drill bit helical groove, 20-reamer blade mounting groove, 21-reamer blade, 22-third vertical surface, 23-third helical surface, 24-reamer helical groove, 25-main water inlet channel, 26-side water inlet channel, 27-tapered countersunk hole, 28-mounting hole, 29-tapered portion. DETAILED DESCRIPTION

[0026] As Figures 1-9The application discloses a combined drill bit with a drill, a reamer and a handle, wherein the drill, the reamer and the handle are coaxially arranged in sequence from front to back, the reamer has a larger diameter than the drill and the handle, the drill is provided with an inner blade and an outer blade, the drill is provided with two drill helical grooves in the circumferential direction, the inner blade is detachably fixed in one of the drill helical grooves, the outer blade is detachably fixed in the other drill helical groove, the top inner blade and the top inner blade of the outer blade are higher than the front end surface of the drill, the top outer blade extends to the outside of the corresponding drill helical groove, the inner blade and the outer blade cooperate to drill holes, the efficiency is higher, the center of the drill is located in the rotation range of the inner blade, and the center of a workpiece can be drilled through during drilling; the reamer is provided with a chamfer blade and a reamer blade, the reamer is provided with a chamfer helical groove and a reamer helical groove in the circumferential direction, preferably two chamfer helical grooves and two reamer helical grooves are arranged in the circumferential direction, the chamfer helical groove and the reamer helical groove are arranged at intervals, the chamfer blade is detachably fixed in the chamfer helical groove, the top blade of the chamfer blade is higher than the front end surface of the reamer and is used for chamfering the top of a hole, the reamer blade is detachably fixed in the reamer helical groove, the top outer blade of the reamer blade extends to the outside of the reamer helical groove and is used for reaming the top of a hole, the top blade of the chamfer blade is higher than the top blade of the reamer blade, and the rotation diameters of the blades of the inner blade, the outer blade, the chamfer blade and the reamer blade increase in sequence.

[0027] The first helical surface 18 is arranged on one side of the drill bit helical groove 19, and the first vertical surface 17 is arranged on the other side of the drill bit helical groove 19; the top inner side of the first vertical surface 17 of one of the drill bit helical grooves 19 is provided with an inner blade mounting groove 10, the top of the inner blade mounting groove 10 is open, the inner blade 11 is detachably fixed in the inner blade mounting groove 10, the blade 12 on the top inner side of the inner blade 11 extends out of the inner blade mounting groove 10, when installed, the inner blade 11 is slightly inclined, the inner side of the bottom of the inner blade 11 is spaced from the bottom of the inner blade mounting groove 10, the outer side of the bottom of the inner blade 11 is in contact with the bottom of the inner blade mounting groove 10, the corresponding part of the side surface of the inner blade 11 is in contact with the corresponding part of the inner wall of the inner blade mounting groove 10, which facilitates the blade 12 on the top inner side of the inner blade 11 to extend out of the inner blade mounting groove 10 and be higher than the front end surface of the drill bit 8, the top outer side of the first vertical surface 17 of the other drill bit helical groove 19 is provided with an outer blade mounting groove 13, the top and outer side of the outer blade mounting groove 13 are open, the outer blade 14 is detachably fixed in the outer blade mounting groove 13, the blade 12 on the top inner side of the outer blade 14 extends out of the outer blade mounting groove 13, the blade 12 on the top outer side of the outer blade 14 extends out of the outer blade mounting groove 13, similarly, when installed, the outer blade 14 is slightly inclined, the inner side of the bottom of the outer blade 14 is spaced from the bottom of the outer blade mounting groove 13, the outer side of the bottom of the outer blade 14 is in contact with the bottom of the outer blade mounting groove 13, the corresponding part of the side surface of the outer blade 14 is in contact with the corresponding part of the inner wall of the outer blade mounting groove 13, which facilitates the blade 12 on the top inner side of the outer blade 14 to extend out of the outer blade mounting groove 13 and be higher than the front end surface of the drill bit 8.

[0028] The second helical surface 4 is arranged on one side of the chamfered helical groove 3, and the second vertical surface 5 is arranged on the other side of the chamfered helical groove 3, the inner side of the second vertical surface 5 extends to the bottom of the drill bit 8, the inner side of the second vertical surface 5 is provided with a chamfered blade mounting groove 9, the chamfered blade 7 is detachably fixed in the chamfered blade mounting groove 9, the top of the counterbore 2 is provided with a notch 6 communicating with the chamfered blade mounting groove 9, one blade 12 on the top of the chamfered blade 7 extends out of the notch 6, the blade 12 of the chamfered blade 7 extends vertically upward to the outside of the notch 6 and corresponds to the bottom of the drill bit 8, which facilitates chamfering of the hole.

[0029] The third helical surface 23 is arranged on one side of the counterbore helical groove 24, and the third vertical surface 22 is arranged on the other side of the chamfered helical groove 3, the top of the third vertical surface 22 is provided with a counterbore blade mounting groove 20, the counterbore blade 21 is detachably fixed in the counterbore blade mounting groove 20, the top and outer side of the counterbore blade mounting groove 20 are open, the blade 12 on the top outer side of the counterbore blade 21 extends out of the counterbore blade mounting groove 20.

[0030] The inner blade 11, the outer blade 14, the chamfering blade 7 and the counterbore blade 21 are of the same structure and are all regular quadrangular prism structures, the bottom surface and the top surface of the regular quadrangular prism are both squares, the side lengths of the two are different, the same structure of the four blades facilitates material management and saves cost, and the four side edges of the circumferences of the regular quadrangular prisms are all cutting edges 12, when one of the cutting edges 12 is worn, another cutting edge 12 can be used by rotating the regular quadrangular prism by 90 degrees, and the utilization rate is high.

[0031] The middle part of the regular quadrangular prism is provided with a mounting hole 28, the mounting hole 28 is provided with a mounting bolt 15, the outer end of the mounting hole 28 is provided with a conical countersunk hole 27, and the head of the mounting bolt 15 is provided with a conical part 29 matched with the conical countersunk hole 27.

[0032] The shank 1 is provided with a main water inlet channel 25, the bottom end of the main water inlet channel 25 extends to the bottom of the shank 1, and the top of the main water inlet channel 25 extends to the drill bit 8; the drill bit helical groove 19 and the counterbore helical groove 24 are both provided with water outlets 16, the drill bit 8 and the counterbore 2 are both provided with side water inlet channels 26 corresponding to the water outlets 16, the side water inlet channels 26 are communicated with the main water inlet channel 25, and the cooling liquid is conveyed through the main water inlet channel 25 and the side water inlet channels 26, so that the drilling and counterboring operations are facilitated.

[0033] In use, the inner blade 11 and the outer blade 14 on the drill bit 8 cooperate to drill holes, the drilling efficiency is high, and the chamfering blade 7 and the counterbore blade 21 are used to chamfer the top of the hole and perform the counterboring operation in sequence; if the inner blade 11, the outer blade 14, the chamfering blade 7 or the counterbore blade 21 is worn, the cutting tool does not need to be disassembled from the tool holder, the corresponding mounting bolt 15 can be loosened, the blade is directly rotated by 90 degrees, the corresponding mounting bolt 15 is tightened again to continue machining, and retooling is not needed, so that the machining efficiency is greatly improved, and the concentricity of the counterboring and the drilling chamfering is ensured.

[0034] In the description of the utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0035] The above examples are illustrative of the utility model and are not limiting of the utility model, and any simple transformation of the utility model falls within the protection scope of the utility model.

Claims

1. A composite drill for indexable drilling and countersinking, comprising a drill bit, a countersink, and a tool holder arranged coaxially from front to back, characterized in that: The drill bit is equipped with an inner blade and an outer blade. The drill bit has two circumferential helical grooves. The inner blade is detachably fixed in one of the helical grooves, and the outer blade is detachably fixed in the other. The innermost cutting edge of both the inner and outer blades is higher than the front end face of the drill bit, and the outermost cutting edge of the outer blade extends to the outside of the corresponding helical groove. The countersink is equipped with a chamfering blade and a countersinking blade. The countersink has chamfering and countersinking helical grooves. The chamfering blade is detachably fixed in the chamfering helical groove, with one cutting edge higher than the front end face of the countersink. The countersinking blade is detachably fixed in the countersinking helical groove, and the outermost cutting edge of the countersinking blade extends to the outside of the countersinking helical groove. The cutting edge of the chamfering blade is higher than the cutting edge of the countersinking blade. The rotation diameter of the cutting edges of the inner blade, outer blade, chamfering blade, and countersinking blade increases sequentially.

2. The indexable drill countersinking and chamfering composite drill as described in claim 1, characterized in that: One side of the drill bit spiral groove is provided with a first spiral surface, and the other side of the drill bit spiral groove is provided with a first vertical surface; the top inner side of the first vertical surface of one of the drill bit spiral grooves is provided with an inner blade mounting groove, the top of the inner blade mounting groove is open, and the inner blade is detachably fixed in the inner blade mounting groove, with the cutting edge on the inner side of the top of the inner blade extending from the top of the inner blade mounting groove to the outside of the inner blade mounting groove; the top outer side of the first vertical surface of the other drill bit spiral groove is provided with an outer blade mounting groove, both the top and outer side of the outer blade mounting groove are open, and the outer blade is detachably fixed in the outer blade mounting groove, with the cutting edge on the inner side of the top of the outer blade extending from the top of the outer blade mounting groove to the outside of the outer blade mounting groove, and the cutting edge on the outer side of the top of the outer blade extending from the outer side of the outer blade mounting groove to the outside of the outer blade mounting groove.

3. The indexable drill countersinking composite drill as described in claim 1, characterized in that: One side of the chamfered spiral groove is provided with a second spiral surface, and the other side of the chamfered spiral groove is provided with a second vertical surface. The inner side of the second vertical surface extends to the bottom of the drill bit. The inner side of the second vertical surface is provided with a chamfering insert mounting groove. The chamfering insert can be detachably fixed in the chamfering insert mounting groove. The top of the countersink is provided with a notch that communicates with the chamfering insert mounting groove. One cutting edge of the top of the chamfering insert extends out of the notch.

4. The indexable drill countersinking and chamfering composite drill as described in claim 1, characterized in that: The countersink has a third spiral surface on one side of the spiral groove and a third vertical surface on the other side of the chamfered spiral groove. The top of the third vertical surface has a countersink blade mounting groove. The countersink blade can be detachably fixed in the countersink blade mounting groove. The top and outer side of the countersink blade mounting groove are open. The cutting edge of the top outer side of the countersink blade extends to the outside of the countersink blade mounting groove.

5. The indexable drill-counterhead composite drill as described in claim 1, characterized in that: The inner blade, outer blade, chamfering blade, and countersink blade have the same structure and are all regular square pyramidal structures, with the four circumferential side edges of the regular square pyramidal structure serving as cutting edges.

6. The indexable drill countersinking and chamfering composite drill as described in claim 5, characterized in that: The central part of the square truncated pyramid has a mounting hole, a mounting bolt is installed in the mounting hole, the outer end of the mounting hole has a tapered countersunk hole, and the head of the mounting bolt has a tapered part that mates with the tapered countersunk hole.

7. The indexable drill countersinking and chamfering composite drill as described in claim 1, characterized in that: The tool holder is equipped with a main water inlet channel, the bottom of which extends to the bottom of the tool holder and the top of which extends into the drill bit. Both the drill bit spiral groove and the countersink spiral groove are equipped with water outlets. Both the drill bit and the countersink are equipped with side water inlet channels that correspond one-to-one with the water outlets. The side water inlet channels are connected to the main water inlet channel.

Images