Drilling and chamfering tool and drilling and chamfering device

Abstract

The utility model discloses a drilling and chamfering tool and a drilling and chamfering device. The drilling and chamfering tool comprises a tool bar, a tool bit and a tool bit, the containing groove is formed in the cutter bar, and an opening communicated with the containing groove is formed in the outer side of the cutter bar; the chamfering blade is arranged in the containing groove, a mounting part of the chamfering blade is fixedly connected with the cutter bar, and a chamfering part of the chamfering blade extends out of the opening and is used for chamfering the orifice; the chamfering part has a first state extending out of the opening and a second state retracting into the containing groove, the outer side of the chamfering part makes contact with the hole wall, so that the chamfering blade generates elastic deformation, the first state is switched into the second state, the outer side of the chamfering part is separated from the hole wall, and the chamfering blade generates elastic reset deformation. The second state is switched to the first state. Compared with the prior art, the drilling and chamfering tool and the drilling and chamfering device have the advantages that the tool does not need to be replaced, the working procedures of drilling and chamfering can be completed at a time, and the working efficiency is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the mechanical technical field, more particularly, especially to a drilling chamfering tool and a drilling chamfering device. BACKGROUND

[0002] Drilling chamfering is a common workpiece machining operation, which is used for chamfering treatment on the edge of the drilled hole. At present, when the workpiece is processed by special drilling chamfering, two tools are needed, one is a drill bit and the other is a chamfering drill. When drilling, the drill bit tool is used first, then the tool bit is replaced with the chamfering drill, and the chamfering work is carried out.

[0003] However, the current processing method is troublesome, the labor intensity of the workers is large, and the processing time is increased, which affects the work efficiency when a large number of workpieces need to be processed and the tool needs to be repeatedly disassembled and replaced.

[0004] Therefore, there is an urgent need for a drilling chamfering tool and a drilling chamfering device which can complete the drilling and chamfering processes at one time without tool replacement, and has higher work efficiency. Invention content

[0005] To solve the above technical problems, the present application provides a drilling chamfering tool and a drilling chamfering device which can complete the drilling and chamfering processes at one time without tool replacement, can shorten the processing time, and improve the work efficiency.

[0006] The technical scheme provided by the present application is as follows:

[0007] A drilling chamfering tool comprises:

[0008] A drill bit is arranged at the front end of the tool bar;

[0009] A receiving groove is arranged in the tool bar, and an opening is arranged on the outer side of the tool bar and communicates with the receiving groove;

[0010] A chamfering blade is arranged in the receiving groove, the mounting portion of the chamfering blade is fixedly connected with the tool bar, and the chamfering portion of the chamfering blade extends out of the opening to chamfer the hole;

[0011] The chamfering portion has a first state of extending out of the opening and a second state of retracting into the receiving groove, the outer side of the chamfering portion is in contact with the hole wall, so that the chamfering blade is elastically deformed to switch the first state to the second state, the outer side of the chamfering portion is separated from the hole wall, and the chamfering blade is elastically reset to switch the second state to the first state.

[0012] Preferably, the chamfering portion is provided with a first chamfering edge, a second chamfering edge and a guide segment near the outer side of the opening, the guide segment extends in a direction parallel to the axis direction of the cutter bar, and the first chamfering edge and the second chamfering edge are respectively arranged at two ends of the guide segment.

[0013] Preferably, a deformation gap is arranged between the inner side of the chamfering portion away from the opening and the groove bottom surface of the accommodating groove.

[0014] Preferably, the chamfering blade is made of spring steel material.

[0015] Preferably, the device further comprises:

[0016] an opening groove arranged at the mounting portion of the chamfering blade, and an opening part of the opening groove is arranged at the side of the chamfering blade close to the opening;

[0017] a rotating shaft sleeved in the opening groove;

[0018] a locking member for fixedly connecting the rotating shaft and the cutter bar.

[0019] Preferably, the opening groove is a U-shaped groove.

[0020] Preferably, the axis of the rotating shaft is arranged at the side of the axis of the cutter bar close to the opening.

[0021] Preferably, the device further comprises:

[0022] a first positioning portion arranged at one end of the mounting portion away from the chamfering portion;

[0023] a second positioning portion arranged on the inner wall of the accommodating groove, and the first positioning portion and the second positioning portion are used in cooperation to limit the mounting portion.

[0024] Preferably, the first positioning portion comprises a first convex surface and a first concave surface connected with each other, the second positioning portion comprises a second concave surface and a second convex surface, the first convex surface is used in cooperation with the second concave surface, and the first concave surface is used in cooperation with the second convex surface.

[0025] A drilling chamfering device, comprising the drilling chamfering tool according to any one of the preceding items.

[0026] The drilling and chamfering tool provided by the utility model, firstly, because the drill rod, the drill bit and the chamfering blade are arranged, the drill bit is arranged at the front end of the drill rod, the drill rod is used for being connected with the rotating driving part, the rotating driving part drives the drill rod and the drill bit to rotate, drilling is carried out on the workpiece, the drill rod is internally provided with a containing groove, the outer circumferential side of the drill rod is provided with an opening, the opening is communicated with the containing groove, the chamfering blade is arranged in the containing groove, and the mounting portion of the chamfering blade is fixedly connected with the drill rod, the front end of the chamfering blade is provided with a chamfering portion, the chamfering portion extends out of the opening, after the drill bit drills the workpiece, the drill bit continues to move downwards, and the chamfering portion chamfers the hole mouth.

[0027] The drilling and chamfering device also comprises the drilling and chamfering tool, and the technical effect of realizing the one-time completion of the drilling and chamfering processes, the shortening of the machining time and the improvement of the work efficiency can also be achieved, and details are not repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained on the basis of these drawings without creative labor.

[0029] Figure 1 A structural schematic view of the drilling and chamfering tool provided by the utility model embodiment;

[0030] Figure 2 A structural schematic view of the chamfering blade provided by the utility model embodiment;

[0031] Figure 3 A structural schematic view of the drilling and chamfering tool provided by the utility model embodiment when drilling (chamfering the hole top of the drilled hole);

[0032] Figure 4 A structure schematic view of the drill chamfer tool is provided for the embodiment of the utility model (the chamfer of the hole bottom drilled is carried out).

[0033] The figure mark: 1, the tool bar; 2, drill; 3, accommodating groove; 4, chamfer blade; 5, pivot; 6, locking piece; 41, first chamfer edge; 42, second chamfer edge; 43, guide section; 44, open slot; 45, first positioning part; 46, inner side surface; 31, groove bottom surface; 32, second positioning part. DETAILED DESCRIPTION

[0034] In order to make the skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below, obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the skilled in the art without making creative labor are within the scope of protection of the present application.

[0035] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly disposed on the other element or indirectly disposed on the other element; when an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0036] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0037] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of", "several" is two or more, unless otherwise explicitly specified.

[0038] It is to be understood that the structure, proportion, size and the like shown in the drawings of the specification are only used to cooperate with the disclosed content, to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the application, so they do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effect and purpose of the application, should still fall within the scope of the disclosed technical content.

[0039] Embodiments of the utility model are written in a progressive manner.

[0040] As Figures 1 to 4 The utility model discloses a drill chamfering tool, including: the knife bar 1, the front end of the knife bar 1 is provided with drill bit 2, the accommodating groove 3 of setting in the knife bar 1, the outer circumferential side of the knife bar 1 is provided with the opening of the communication with accommodating groove 3, the chamfering blade 4 of setting in accommodating groove 3, the installation part of chamfering blade 4 is fixedly connected with the knife bar 1, and the chamfering part of chamfering blade 4 stretches out from the opening, to chamfer the chamfering of the aperture, the chamfering part has the first state of stretching out from the opening and the second state of retracting to accommodating groove 3, and the outside of the chamfering part is in contact with the hole wall, so that chamfering blade 4 generates elastic deformation, to switch the first state to the second state, the outside of the chamfering part is separated from the hole wall, and chamfering blade 4 generates elastic reset deformation, to switch the second state to the first state.

[0041] At present, when the workpiece is processed by special drilling and chamfering, two cutters need to be used, one is drill cutter, and the other is chamfering drill. When drilling, drill cutter is used to drill first, then the drill bit is replaced with chamfering drill, and then the chamfering work is carried out.

[0042] However, when the workpiece to be processed is more, the cutter needs to be repeatedly disassembled and replaced, which is more troublesome, the labor intensity of the workers is large, and the installation process needs a certain time, the processing time is also increased, and the work efficiency is affected.

[0043] The drilling and chamfering tool provided by this utility model is firstly equipped with a tool holder 1, a drill bit 2, and a chamfering insert 4. The drill bit 2 is located at the front end of the tool holder 1, which is connected to a rotating drive component. The rotating drive component drives the tool holder 1 and the drill bit 2 to rotate and drill a hole in the workpiece. The tool holder 1 is provided with a receiving groove 3, and an opening is provided on the outer periphery of the tool holder 1, which communicates with the receiving groove 3. The chamfering insert 4 is located in the receiving groove 3, and the mounting part of the chamfering insert 4 is fixedly connected to the tool holder 1. The front end of the chamfering insert 4 is provided with a chamfered part, which extends from the opening. After the drill bit 2 drills a hole in the workpiece, the drill bit 2 continues to move downward, and the chamfered part chamfers the hole opening. Secondly, the chamfered portion has a first state and a second state. When the chamfered portion is in the first state, it extends from the opening, facilitating chamfering of the inner wall of the hole. When the chamfered portion is in the second state, it retracts into the receiving groove 3, allowing the drill bit 2 to continue drilling downwards. After chamfering, the outer side of the chamfered portion contacts the hole wall, causing the chamfering blade 4 to undergo elastic deformation, thus switching the chamfered portion from the first state to the second state, facilitating the drill bit 2 to drill downwards. When the outer side of the chamfered portion disengages from the hole wall, the chamfering blade 4 undergoes elastic restoring deformation, switching the second state back to the first state, and the chamfered portion extends from the opening, facilitating the next chamfering operation. Therefore, compared with the prior art, the drilling and chamfering tool in this embodiment of the present invention does not require tool changing and can complete the drilling and chamfering processes in one operation, shortening processing time and improving work efficiency.

[0044] In the above structure, if the drilling and chamfering tool provided in this embodiment of the present invention is used for processing blind holes, only one chamfering edge can be provided on the chamfered part. First, the drill bit 2 is used to drill, and then the chamfering edge is used to chamfer the inner wall of the hole. After the chamfering is completed, under the constraint of the hole wall, the chamfered part retracts into the receiving groove 3, so that the drill bit 2 can continue to drill downwards until the drilling work is completed. Since the chamfered part can switch between the first state and the second state, the drilling depth is not affected by the chamfered part.

[0045] In the above structure, if the drilling chamfering tool provided in this embodiment of the present invention is used to drill through holes and chamfer the inner holes at the top and bottom of the drilled holes, as a preferred embodiment, the chamfered part in this embodiment of the present invention is provided with two chamfering blades. The two chamfering blades are used to chamfer the inner holes at the top and bottom of the drilled holes. Specifically, the chamfered part is provided with a first chamfering blade 41, a second chamfering blade 42 and a guide section 43 near the outer side of the opening. The guide section 43 extends in a direction parallel to the axis of the tool holder 1. The first chamfering blade 41 and the second chamfering blade 42 are respectively provided at both ends of the guide section 43.

[0046] like Figures 3 to 4 As shown, Figure 3(a) is the schematic view of the drill bit when drilling, Figure 3 (b) is the schematic view of the first chamfering blade when chamfering, Figure 3 (c) is the schematic view of the elastic deformation of the chamfering blade 4 after chamfering is completed, and the chamfering part is retracted into the accommodating groove 3; Figure 4 (d) is the schematic view of the structure after the through hole is drilled; Figure 4 (e) is the schematic view of the second chamfering blade when chamfering; Figure 4 (f) is the schematic view of the elastic deformation of the chamfering blade after chamfering is completed, and the chamfering part is retracted into the accommodating groove; Figure 4 (g) is the schematic view of the structure when the drill bit exits the hole.

[0047] The step of chamfering the through hole by the drill chamfering tool provided in the embodiment of the utility model is specifically as follows:

[0048] The first chamfering blade 41 is arranged below the second chamfering blade 42, the guide section 43 is arranged at both ends of the first chamfering blade 41 and the second chamfering blade 42, the drill bit 2 is moved downward in the process of rotating, and drilling is performed on the workpiece, as shown in Figure 3 (a) ;

[0049] The drill rod continues to move downward, the first chamfering blade 41 is in contact with the top of the hole wall, and the first chamfering blade 41 chamfers the top hole, as shown in Figure 3 (b) ;

[0050] The drill rod continues to move downward, the outer periphery of the guide section 43 is in contact with the hole wall, under the action of the hole wall, the elastic deformation of the chamfering blade 4 is pushed, the chamfering part is retracted into the accommodating groove 3, so that the drill rod can continue to move downward, after the through hole is drilled, the chamfering part is separated from the hole wall, the elastic reset deformation of the chamfering blade 4 is generated, and the chamfering part returns to the first state of extending from the opening, as shown in Figure 3 (c) ;

[0051] When the hole bottom needs to be chamfered, the drill rod is lifted upward, and the drill bit 2 is reversely rotated, as shown in Figure 4 (d) ;

[0052] The second chamfering blade 42 is in contact with the bottom of the through hole, and the second chamfering blade 42 chamfers the bottom of the through hole, as shown in Figure 4 (e) ;

[0053] The drill rod continues to move upward, the outer periphery of the guide section 43 is in contact with the hole wall, under the action of the hole wall, the elastic deformation of the chamfering blade 4 is pushed, and the chamfering part is retracted into the accommodating groove 3, as shown in Figure 4 (f) ;

[0054] The drill rod can continue to move upward until the chamfering portion is completely separated from the through hole, the chamfering blade 4 is elastically reset, the chamfering portion returns to the first state of extending from the opening, the drill rod is moved upward until the drill bit 2 is completely withdrawn from the through hole, and the drill bit 2 is replaced. Figure 4 (g) as shown.

[0055] In the structure, the first chamfering edge 41, the second chamfering edge 42 and the guide section 43 in the embodiment of the utility model are arranged at the outermost side of the chamfering blade 4, when the chamfering portion is in the second state, the chamfering blade 4 is completely accommodated in the accommodating groove 3, and the interference between the chamfering blade 4 and the hole wall during drilling is avoided.

[0056] Further, as one of the specific embodiments, the first chamfering edge 41 and the second chamfering edge 42 in the embodiment of the utility model are used to form a 45° chamfer, and the angle formed by the first chamfering edge 41 and the second chamfering edge 42 and the guide section 43 is 135°.

[0057] Further, as one of the embodiments, the inner side surface 46 of the chamfering portion away from the opening is provided with a deformation gap between the groove bottom surface 31 of the accommodating groove 3, that is, when the hole wall pushes the chamfering blade 4 to produce elastic deformation, the chamfering portion deforms towards the direction of the groove bottom surface of the accommodating groove 3, so that the chamfering portion can retract into the accommodating groove 3, and the drill rod can continue to move axially.

[0058] In the structure, as one of the embodiments, the chamfering blade 4 in the embodiment of the utility model is made of spring steel material. In order to ensure the use performance of the chamfering portion, the chamfering portion in the embodiment of the utility model is heat treated by quenching, and in order to further ensure the strength of the first chamfering edge 41 and the second chamfering edge 42, a coating is applied to the edge of the first chamfering edge 41 and the second chamfering edge 42.

[0059] In the structure, the mounting portion of the chamfering blade 4 is fixedly connected with the tool rod 1, as one of the specific embodiments, the drill hole chamfering tool in the embodiment of the utility model further comprises an opening groove 44, a rotating shaft 5 and a locking piece 6, wherein the opening groove 44 is arranged on the mounting portion of the chamfering blade 4, the opening portion of the opening groove 44 is arranged on the side of the mounting portion close to the opening, the rotating shaft 5 is sleeved in the opening groove 44, and the locking piece 6 is used for fixedly connecting the rotating shaft 5 with the tool rod 1. The chamfering blade 4 is indirectly connected with the tool rod 1 through the rotating shaft 5 and the locking piece 6, which is more convenient for replacing the chamfering blade 4, and in addition, since the opening portion of the opening groove 44 is arranged on the side of the mounting portion close to the opening, the width of the inner side of the opening groove 44 close to the groove bottom of the accommodating groove 3 is small, so that the chamfering blade 4 can elastically deform and elastically reset from the inner side of the opening groove 44.

[0060] In the above structure, as one of the embodiments, the opening slot 44 in the utility model embodiment is specifically a U-shaped slot, and the cross section of the rotating shaft 5 in the utility model embodiment is specifically circular.

[0061] In the above structure, as one of the embodiments, the locking piece 6 in the utility model embodiment is specifically a locking screw, and the rotating shaft 5 and the cutter bar 1 are fixedly connected through the locking screw.

[0062] In the above structure, as one of the specific embodiments, the axis of the rotating shaft 5 is arranged eccentrically with the axis of the cutter bar 1, and specifically, the axis of the rotating shaft 5 is arranged on the side of the axis of the cutter bar 1 close to the opening, so as to ensure the strength of the cutter bar 1.

[0063] In the above structure, the rotating shaft 5 and the opening slot 44 are specifically gap-fitted, and in order to ensure that the mounting portion and the cutter bar 1 do not relatively rotate and move in the process of use of the chamfering blade 4, as one of the embodiments, the drilling and chamfering tool further comprises a first positioning portion 45 and a second positioning portion 32, wherein the first positioning portion 45 is arranged at the end of the mounting portion away from the chamfering portion, the second positioning portion 32 is arranged on the inner wall of the accommodating slot 3, and the first positioning portion 45 and the second positioning portion 32 are used in cooperation to limit the mounting portion, so as to avoid relative rotation and movement between the mounting portion and the cutter bar 1 in the process of use.

[0064] In the above structure, as one of the specific embodiments, the first positioning portion 45 in the utility model embodiment comprises a first boss surface and a first recess surface, the first boss surface is connected with the first recess surface, the second positioning portion 32 comprises a second recess surface and a second boss surface, wherein the second recess surface is matched with the first boss surface, and the second boss surface is matched with the first recess surface, so as to limit the mounting portion, and avoid relative rotation and movement between the mounting portion and the cutter bar 1 in the process of use.

[0065] The utility model also provides a drilling and chamfering device which comprises the drilling and chamfering tool of any one of the above, and also can realize the technical effect that the tool does not need to be replaced, the drilling and chamfering processes can be completed at one time, the processing time is shortened, and the work efficiency is improved.

[0066] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown in the text, but will conform to the widest scope consistent with the principles and novel features disclosed in the text.

Claims

1. A drill corner cutter characterized by, The drill hole chamfering tool comprises a cutter bar (1), a drill bit (2) arranged at the front end of the cutter bar (1), a receiving groove (3) arranged in the cutter bar (1), an opening arranged on the outer side of the cutter bar (1) and communicating with the receiving groove (3), a chamfering blade (4) arranged in the receiving groove (3), and a mounting portion of the chamfering blade (4) being fixedly connected with the cutter bar (1), and a chamfering portion of the chamfering blade (4) extending out of the opening and being used for chamfering a hole opening.

2. The drill hole chamfering tool according to claim 1, wherein a first chamfering edge (41), a second chamfering edge (42) and a guide section (43) are arranged on the outer side of the chamfering portion close to the opening, the guide section (43) extends in a direction parallel to the axis direction of the cutter bar (1), and the first chamfering edge (41) and the second chamfering edge (42) are arranged at two ends of the guide section (43) respectively.

3. The drill hole chamfering tool according to claim 2, wherein a deformation gap is arranged between an inner side face (46) of the chamfering portion away from the opening and a groove bottom face (31) of the receiving groove (3).

4. The drill hole chamfering tool according to claim 1, wherein the chamfering blade (4) is made of spring steel material.

5. The drill hole chamfering tool according to any one of claims 1 to 4, further comprising an opening groove (44) arranged on the mounting portion of the chamfering blade (4), an opening portion of the opening groove (44) being arranged on the side of the chamfering blade (4) close to the opening, a rotating shaft (5) sleeved in the opening groove (44), and a locking member (6) fixedly connecting the rotating shaft (5) with the cutter bar (1).

6. The drill hole chamfering tool according to claim 5, wherein the opening groove (44) is a U-shaped groove.

7. The drill hole chamfering tool according to claim 5, wherein the axis of the rotating shaft (5) is arranged on the side of the axis of the cutter bar (1) close to the opening.

8. The drill hole chamfering tool according to claim 6, further comprising a first positioning portion (45) arranged on the end of the mounting portion away from the chamfering portion, and a second positioning portion (32) arranged on the inner wall of the receiving groove (3), the first positioning portion (45) and the second positioning portion (32) being used in cooperation to limit the mounting portion.

9. The drill hole chamfering tool according to claim 8, ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The first positioning part (45) comprises a first connecting convex surface and a first connecting concave surface, and the second positioning part (32) comprises a second connecting concave surface and a second connecting convex surface, the first connecting convex surface being used in cooperation with the second connecting concave surface, and the first connecting concave surface being used in cooperation with the second connecting convex surface.

10. A drill hole chamfering device, characterized by A drill chamfering tool comprising the drill chamfering tool according to any one of claims 1 to 9.

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