CN204486875U - Four-in-one screw hole countersunk knife - Google Patents

Abstract

The utility model relates to a four-in-one screw hole countersink tool, which is provided with a blade, the blade is arranged on a tool handle, the cutting end of the blade is provided with a drilling pit part, two sides of the drilling pit part are respectively connected with one end of a cutting groove part, two opposite side edges of the blade are respectively provided with a cutting part and a chamfered part, the cutting part is connected with the other end of the cutting groove part, and two opposite side surfaces of the blade are respectively provided with a chip groove; the drill pit part of the blade forms a conical pit in a machined part, the grooving part and the cutting edge part are used for cutting to form a groove, the chamfering part is used for processing a first chamfer of the groove, and a drill bit is used for drilling and forming a hole in the center of the conical pit, so that a counter sink and a second chamfer can be formed, the processing procedures of the counter sink and the chamfer can be reduced, the number of required cutting tools is reduced, the processing time is shortened, and the processing and manufacturing efficiency is improved.

Description

Four-in-one screw hole countersunk knife

technical field

The utility model relates to a processing tool, in particular to a tool for machining and forming holes on workpieces.

Background technique

Drilling is a common process in mechanical processing. It usually depends on the workpiece and the assembly requirements for the screw through connection. The countersink hole processing on the workpiece can provide the head of the screw to be embedded in the countersink hole. It does not protrude from the surface of the workpiece. In addition, in order to remove the burr generated by processing and to facilitate the assembly of parts, after the hole is processed, the staff will further chamfer the edge of the hole.

Please refer to Figure 11 to Figure 15 for the countersink machining process in the prior art. When a worker wants to process a countersink on a workpiece 50, first, as shown in Figure 11, a center drill 60 At the workpiece 50, a cone 51 is processed to facilitate the positioning and guidance of the drilling process, and then a drill bit 70 is placed at the center of the cone 51, as shown in Figure 12, and a hole 52 is formed by drilling. , the staff then uses a countersunk milling cutter 80 at the cone 51, as shown in Figure 13, to further cut a countersink 53, the countersink 53 is connected to the hole 52 to form a stepped shape, using a The first chamfering knife 91 is chamfered at the edge where the counterbore 53 is connected to the hole 52, as shown in Figure 14, to form a first chamfering 531, and finally, a second chamfering knife 92 is used on the edge of the hole 52. The edge of the counterbore 53 is chamfered, as shown in FIG. 15 , to form a second chamfer 532 .

However, the machining of countersunk holes in the prior art needs to go through multiple processes and use various types of cutting tools to complete the machining of countersinks and chamfers, which makes the entire machining process time-consuming and reduces the efficiency of manufacturing .

Utility model content

The purpose of this utility model is to improve the prior art, which requires multiple processes to form counterbore and chamfering, which is time-consuming and low in manufacturing efficiency. Through the implementation of the technical means of the utility model, the process of processing It can be reduced, reducing the number of cutting tools required, thereby shortening the processing time and improving the manufacturing efficiency.

In order to achieve the above creation purpose, the technical means adopted in the utility model is to design a four-in-one screw hole countersunk knife, wherein, the four-in-one screw hole countersunk knife has a blade and a handle, and the blade is connected to the handle;

The blade is a single piece, and the blade has a drilling portion, two grooving portions, two cutting edge portions, two chamfering portions and at least one flute, and the opposite sides of the blade are side edges, so The opposite surfaces of the blade are sides, and the side edges are connected to the sides;

The drill hole protrudes from the center of one end face of the blade in an obtuse angle, the two grooves are formed on the end face of the blade and the two grooves are respectively located on both sides of the drill hole;

The two cutting edge portions are respectively formed on opposite side edges of the blade, and one end portion of the cutting edge portion is connected to one end portion of the cutting groove portion;

The two chamfers are respectively formed on opposite side edges of the blade, one end of the chamfer is connected to the other end of the cutting edge, and the chamfer and the cutting edge form an obtuse angle;

The chip flute is concavely formed on one side of the blade, and the chip flute is connected to the drilling part, the groove part and the cutting edge part.

The four-in-one screw hole countersunk knife, wherein, the blade has two chip removal grooves, one of which is formed at the connecting side edge of one side of the blade, and the other chip removal groove is formed at the edge of the blade The other side of the connecting edge of the other side;

The burrow portion has two first edge surfaces, which are symmetrically formed on both sides of the center of the end surface of the blade, and one of the first edge surfaces is inclined relative to a side surface of the blade, and the other first edge surface is an edge face is inclined relative to the other side of the blade;

Each of the two grooves has a second edge surface, wherein one second edge surface is inclined relative to one side of the blade, and the other second edge surface is inclined relative to the other side surface of the blade, and the two second edge surfaces are respectively connecting the adjacent first facets;

Each of the two cutting edge portions has a third edge surface, wherein one third edge surface is inclined relative to one side of the blade, and the other third edge surface is inclined relative to the other side surface of the blade, and the two third edge surfaces are respectively connecting the adjacent second edge faces;

Each of the two chamfers has a fourth edge surface, wherein one fourth edge surface is inclined relative to one side of the blade, and the other fourth edge surface is inclined relative to the other side surface of the blade, and the two fourth edge surfaces are respectively The adjacent third edge faces are connected.

The four-in-one countersunk knife with screw holes, wherein the handle is a rod body, and one end of the handle forms a mounting part;

The blade has a mounting end, and the mounting end is connected and fixed to the mounting portion of the knife handle.

The four-in-one countersunk knife with screw holes, wherein the handle of the knife further has a connecting piece, and the installation part protrudes from one end of the handle of the knife;

The installation part is two clamping pieces arranged at intervals, and a groove is formed in the center of the two clamping pieces, and the two clamping pieces are respectively pierced to form a connecting hole, and the connecting holes on the two clamping pieces correspond to each other, and one of the clamping pieces The inner edge of the connection hole of the sheet forms an internal thread;

The blade has a fixing hole, the blade is accommodated in the groove formed by the two clamping pieces, and the fixing hole corresponds to the connecting hole of the clamping piece; the connecting piece passes through the clamping piece and the fixing hole, and the connecting piece is threaded Connects to a connection hole with an internal thread.

The four-in-one countersunk knife with screw holes, wherein the handle further has an abutting portion, and the abutting portion has a wedge-shaped depression formed in the groove formed by the two clamping pieces;

The mounting end is formed as a wedge-shaped projection at one end of the blade, and the mounting end is correspondingly pressed against the abutting portion of the knife handle.

The four-in-one countersunk knife with screw holes, wherein the knife handle further has an abutting portion, and the abutting portion has a wedge-shaped projection formed in the groove formed by the two clamping pieces;

The mounting end is a wedge-shaped depression formed on one end of the blade, and the mounting end is abutted by the abutting portion of the knife handle.

The utility model has the advantages that a cone hole is formed on a workpiece through the drilled part of the blade, a groove is formed on the workpiece by cutting the grooving part and the cutting edge part of the blade, and the chamfering part is processed The first chamfer of the groove, and then drill a hole in the center of the cone pit with a drill bit to form a countersink and a second chamfer, so that the countersink and chamfer of the workpiece can be processed The process can be reduced, reducing the number of cutting tools required to shorten the processing time and improve manufacturing efficiency.

Description of drawings

The following drawings are only intended to illustrate and explain the utility model schematically, and do not limit the scope of the utility model. in:

Fig. 1 is a perspective view of the utility model.

Fig. 2 is a separation diagram of the utility model.

Fig. 3 is the front view of the utility model blade.

Fig. 4 is a bottom view of Fig. 3 of the present utility model.

Fig. 5 is a side view of Fig. 3 of the present utility model.

Fig. 6 is the front view of the handle of the utility model.

Fig. 7 is a partial sectional view of the utility model.

Fig. 8 is a diagram of another embodiment of the installation of the utility model.

Fig. 9 is a schematic diagram of the processing groove of the present invention.

Fig. 10 is a schematic view of the drilling of the utility model.

Fig. 11 is a schematic diagram of a drilling center hole in the prior art.

Fig. 12 is a schematic diagram of drilling in the prior art.

Fig. 13 is a schematic diagram of processing a counterbore in the prior art.

Fig. 14 is a schematic diagram of processing the first chamfer in the prior art.

Fig. 15 is a schematic diagram of processing the second chamfer in the prior art.

Explanation of reference numbers:

10. 10A blade 11 Drilling part

111 The first blade face 12 Grooving part

121 Second blade surface 13 Cutting edge

131 The third blade surface 14 Chamfering

141 The fourth cutting edge 15 Flutes

16 Fixing hole 17, 17A mounting end

101 side edge 102 side

20. 20A tool handle 21 Installation department

200, 200A abutting part 211 clamping piece

212 connection hole 22 connectors

30 processed parts 31 grooves

311 cone pit 3111 second chamfer

312 end face 313 side wall

314 first chamfer 32 holes

40 drill bits 50 workpieces

51 cone pit 52 holes

53 countersunk hole 531 first chamfer

532 second chamfer 60 center drill bit

70 drill bit 80 countersunk milling cutter

91 first chamfering knife 92 second chamfering knife

Detailed ways

In the following, in conjunction with the drawings and preferred embodiments of the utility model, the technical means adopted by the utility model to achieve the intended purpose of the utility model are further described.

Please refer to FIG. 1 and FIG. 2 , the four-in-one countersunk knife with screw holes of the present invention has a blade 10 and a handle 20 , and the blade 10 is mounted on one end of the handle 20 .

Please refer to Fig. 3 and Fig. 4, the blade 10 is a piece, which has a cutting end and a mounting end 17, and the cutting end and the mounting end 17 are respectively formed on opposite ends of the blade 10; On opposite sides of the blade 10 are side edges 101 , and on opposite sides of the blade 10 are side faces 102 to which the side edges 101 are connected.

The cutting end has a bore portion 11 , two groove portions 12 , two cutting edge portions 13 , two chamfer portions 14 , two flutes 15 and a fixing hole 16 .

The burrow portion 11 protrudes from the center of an end surface of the blade 10 in an obtuse angle, and the two grooving portions 12 are formed on the end surface of the blade 10 and are respectively located on both sides of the burrow portion 11. The burrow portion 11 has two first edge surfaces 111, the two first edge surfaces 111 are formed symmetrically and complementary to the end surface of the blade 10, the first edge surfaces 111 are inclined relative to the side surface 102, specifically, the two first edge surfaces 111 are symmetrically formed on both sides of the center of the end face of the blade 10, and one of the first edge surfaces 111 is inclined relative to one side 102 of the blade 10, and the other first edge surface 111 is inclined relative to the other side of the blade 10. 102 inclined; the groove portion 12 has a second edge surface 121, the second edge surface 121 of the two groove portions 12 is formed complementary to the end surface of the blade 10, and the second edge surface 121 is inclined relative to the side surface 102 , and the second blade surface 121 is connected to the first blade surface 111 , specifically, one of the second blade surfaces 121 is inclined relative to one side surface 102 , and the other second blade surface 121 is inclined relative to the other side surface 102 .

Please refer to Fig. 5 at the same time, the two cutting edge portions 13 are respectively formed on opposite side edges 101 of the blade 10, one end portion of the cutting edge portion 13 is connected to one end portion of the groove portion 12, the cutting edge portion The portion 13 has a third edge surface 131, the third edge surfaces 131 of the two cutting edge portions 13 are complementary formed on the two side edges 101 of the blade 10, the third edge surface 131 is inclined relative to the side surface 102, and the The third edge surface 131 is connected to the second edge surface 121, specifically, one of the third edge surfaces 131 is inclined relative to one side 102 of the blade 10, and the other third edge surface 131 is inclined relative to the other side of the blade 10. 102 tilt.

The two chamfers 14 are respectively formed on the opposite side edges 101 of the blade 10, one end of the chamfer 14 is connected to the other end of the cutting edge 13, and the chamfer 14 is connected to the cutting edge. The part 13 forms an obtuse angle, and the chamfered part 14 has a fourth edge surface 141, and the fourth edge surfaces 141 of the two chamfered parts 14 are complementary formed on the two side edges 101 of the blade 10, and the fourth edge surface 141 It is inclined relative to the side surface 102, and the fourth edge surface 141 is connected to the third edge surface 131. Specifically, one of the fourth edge surfaces 141 is inclined relative to one of the side surfaces 102 of the blade 10, and the other fourth edge surface 141 is inclined relative to the other side 102 of the blade 10 .

The two flutes 15 are complementary recesses formed on the opposite side surfaces 102 of the blade 10, and the flutes 15 are connected to the drilling portion 11, the groove portion 12 and the cutting edge portion 13, specifically, One of the chip removal grooves 15 is formed at a place where one side 102 of the blade 10 connects with one side edge 101 , and the other chip removal groove 15 is formed at a place where the other side surface 102 of the blade 10 connects with the other side edge 101 .

The fixing hole 16 is formed through the blade 10 .

In the specific embodiment shown in FIG. 3 , the mounting end 17 is formed as a wedge-shaped protrusion at one end of the blade 10 , however, the shape of the mounting end 17 is not limited thereto.

Please refer to Fig. 6 and Fig. 7, the handle 20 is a rod body, one end of which forms a mounting portion 21 and an abutting portion 200, and has a connecting piece 22, specifically, the connecting piece 22 is a screw; the mounting end 17 of the blade 10 is connected and fixed to the mounting portion 21 of the handle 20 .

The mounting portion 21 protrudes from one end of the knife handle 20, specifically, the mounting portion 21 is two clamping pieces 211 arranged at intervals, and a groove is formed in the center of the two clamping pieces 211, and the clamping piece 211 are respectively pierced to form a connecting hole 212, the connecting holes 212 on the two holding pieces 211 correspond to each other, the inner edge of the connecting hole 212 of one holding piece 211 forms an internal thread, and the wedge-shaped depression of the abutting portion 200 is formed on the The two clamping pieces 211 form the cavity; the blade 10 is accommodated in the two clamping pieces 211 forming the cavity, and the mounting end 17 of the blade 10 is correspondingly pressed against the abutting portion 200, and the fixing hole 16 corresponds to the clamping The connecting hole 212 of the sheet 211, the connecting piece 22 passes through the clamping sheet 211 and the fixing hole 16, and is screwed to the connecting hole 212 having an internal thread.

Another embodiment in which the blade 10 is fixed to the knife handle 20, please refer to FIG. The shape of the depression, when installing, the installation end 17A of the blade 10A is abutted by the abutting portion 200A of the handle 20A.

The wedge-shaped abutting relationship between the mounting end 17 of the blade 10 and the abutting portion 200 of the knife handle 20 helps the utility model to maintain the stability of the blade 10 relative to the knife handle 20 during the processing process. No shaking will occur.

The step of using the utility model to process the countersink hole, please refer to the shown in Figure 9, the blade 10 of the utility model is installed and combined with the handle 20, so as to cut a workpiece 30, the blade 10 is used for the processing Part 30 is cut to form a groove 31, and the drilling part 11 of the insert 10 processes the groove 31 to form a conical pit 311, and the cutting groove part 12 and the cutting edge part 13 are respectively processed to form the end surface of the groove 31 312 and side wall 313, the chamfer portion 14 then forms the first chamfer 314 of the groove 31, and then, referring to Figure 10, a drill bit 40 is used to cut at the center of the conical pit 311 to form a hole 32. The conical pit 311 can be used for positioning and guiding the drilling process of the drill bit 40. The groove 31 connects the hole 32 to form a stepped structure. At this time, the groove 31 and the hole 32 form a sinking Moreover, since the diameter of the hole 32 is slightly smaller than the maximum diameter of the cone 311, a second chamfer 3111 is naturally formed at the junction of the groove 31 and the hole 32.

Because the blade 10 of the present utility model can form the processing features such as the cone pit 311, the end surface 312, the side wall 313 and the first chamfer 314 on the workpiece 30 with one cutting, and then only need to drill with the drill bit 40 Forming the hole 32 can complete the processing of the counterbore and the chamfering. Therefore, the cutting process and the required tools can be greatly reduced, thereby shortening the processing time and improving the processing and manufacturing efficiency.

The above descriptions are only illustrative specific implementations of the present utility model, and are not intended to limit the scope of the present utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principle of the present utility model shall fall within the protection scope of the present utility model.

Claims (6)

1. A four-in-one countersunk knife with screw holes, characterized in that: the four-in-one countersunk knife with screw holes has a blade and a handle, and the blade is connected to the handle; The blade is a one-piece body, and the blade has a drill portion, two groove portions, two cutting edge portions, two chamfer portions and at least one flute, and the opposite sides of the blade are side edges , the opposite two surfaces of the blade are sides, and the side edges are connected to the sides; The drill hole protrudes from the center of one end face of the blade in an obtuse angle, and the two grooves are formed on the end face of the blade, and the two grooves are respectively located in the drill hole both sides of the department; The two cutting edge portions are respectively formed on opposite side edges of the blade, and one end portion of the cutting edge portion is connected to one end portion of the groove portion; The two chamfers are respectively formed on opposite side edges of the blade, one end of the chamfer is connected to the other end of the cutting edge, and the chamfer and the cutting edge form an obtuse angle; The chip flute is concavely formed on one side of the blade, and the chip flute is connected to the drill hole portion, the grooving portion, and the cutting edge portion. 2. The four-in-one screw hole countersunk knife according to claim 1, wherein the blade has two chip removal grooves, one of the chip removal grooves is formed on one of the side surfaces of the blade connected to one of the side edges, and the other said flute is formed on the other said side edge of the blade connected to the other said side edge; The burrow portion has two first edge surfaces, and the two first edge surfaces are symmetrically formed on both sides of the center of the end surface of the insert, and one of the first edge surfaces is opposite to one of the insert. The side is inclined, and the other first edge surface is inclined relative to the other side of the blade; Each of the two grooves has a second edge surface, wherein one of the second edge surfaces is inclined relative to one of the side surfaces of the blade, and the other second edge surface is inclined relative to the other side of the blade. The sides are inclined, and the two second blade surfaces are respectively connected to the adjacent first blade surfaces; Each of the two cutting edge portions has a third edge surface, wherein one of the third edge surfaces is inclined relative to one of the side surfaces of the blade, and the other third edge surface is inclined relative to the other side surface of the blade. inclined, and the two third blade surfaces are respectively connected to the adjacent second blade surfaces; Each of the two chamfered portions has a fourth edge surface, wherein one of the fourth edge surfaces is inclined relative to one of the side surfaces of the blade, and the other fourth edge surface is inclined relative to the other side surface of the blade. inclined, and the two fourth blade surfaces are respectively connected to the adjacent third blade surfaces. 3. The four-in-one screw hole countersunk knife according to claim 1 or 2, characterized in that: the handle of the knife is a rod body, and one end of the handle of the knife forms a mounting part; The blade has an installation end, and the installation end is connected and fixed to the installation part of the knife handle. 4. The four-in-one screw hole countersunk knife according to claim 3, characterized in that: the handle of the knife further has a connecting piece, and the installation part protrudes from one end of the handle of the knife; The installation part is two clamping pieces arranged at intervals, a container is formed in the center of the two clamping pieces, and the two clamping pieces are respectively pierced to form a connecting hole, and the connecting holes on the two clamping pieces Corresponding to each other, the inner edge of the connecting hole of one of the clamping pieces forms an internal thread; The blade has a fixing hole, the blade is accommodated in the groove formed by the two holding pieces, and the fixing hole corresponds to the connecting hole of the holding pieces; The connecting piece passes through the clamping piece and the fixing hole, and the connecting piece is threadedly connected to the connecting hole having an internal thread. 5. The four-in-one screw hole countersunk knife according to claim 4, characterized in that: the handle of the knife further has an abutment portion, and the abutment portion has wedge-shaped depressions formed on the two holding pieces forming said tank; The mounting end is a wedge-shaped protrusion formed on one end of the blade, and the mounting end is correspondingly pressed against the abutting portion of the knife handle. 6. The four-in-one screw hole countersunk knife according to claim 4, characterized in that: the handle of the knife further has an abutment portion, and the abutment portion is a wedge-shaped protrusion formed on the two clamping parts. The tank formed by the sheet; The mounting end is a wedge-shaped depression formed on one end of the blade, and the mounting end is abutted by the abutting portion of the handle.