CN219484305U

CN219484305U - Self-guiding spade drill

Info

Publication number: CN219484305U
Application number: CN202223131672.5U
Authority: CN
Inventors: 吴家国; 杨昌勇; 陈沙; 刘成雨; 赵良平
Original assignee: CSIC Zhongnan Equipment Co Ltd
Current assignee: CSIC Zhongnan Equipment Co Ltd
Priority date: 2022-11-24
Filing date: 2022-11-24
Publication date: 2023-08-08
Anticipated expiration: 2032-11-24

Abstract

The utility model provides a self-guiding flat drill, which relates to the technical field of machining and comprises a drill rod, a drill bit body, guiding wood and a cutter body, wherein a connecting hole is formed in the end face of the drill rod, a screw hole is formed in the side face of the drill rod, the bottom end of the screw hole is communicated with the connecting hole, the drill bit body comprises a connecting handle and a drill bit, the connecting handle is matched with the connecting hole, at least one kidney-shaped groove is formed in the side face of the drill bit, a clamping groove is formed in the end portion, far away from the connecting handle, of the drill bit, the center line of the clamping groove coincides with the center line of the drill bit, the guiding wood is of a kidney-shaped structure, the guiding wood is in interference fit with the kidney-shaped groove, a mounting through hole is formed in the side face of the cutter body, and the cutter body is arranged in the clamping groove. The self-guiding flat drill can realize the self-guiding function, improve the machining precision and improve the product qualification rate.

Description

Self-guiding spade drill

Technical Field

The utility model relates to the technical field of machining, in particular to a self-guiding spade drill.

Background

At present, a long shaft product is provided with a through eccentric hole from the left end face, an inclined hole is required to be machined on the right end face of the long shaft product and is intersected with the eccentric hole, the position deviation required by the intersection is relatively strict, the existing machining method adopts a numerical control machining center and an alloy drill bit machining method, because the end position of the inclined hole is uncontrolled due to the deviation of the drill bit, an intersection step is generated at the intersection position of the inclined hole and the eccentric hole, and the end position of the inclined hole cannot be guaranteed to be located at the intersection position of the inclined holeThe product percent of pass is greatly reduced within the position degree requirement. Therefore, a self-guiding flat drill is needed, which can realize the self-guiding function, improve the machining precision and the product qualification rate and can also improve the hole wall roughness requirement of the drilled hole.

Disclosure of Invention

The object of the present utility model is to provide a self-guiding spade drill which ameliorates the above problems. In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the application provides a self-guiding flat drill, which comprises a drill rod, a drill bit body, guiding wood and a cutter body, wherein a connecting hole is formed in the end face of the drill rod, a screw hole is formed in the side face of the drill rod, and the bottom end of the screw hole is communicated with the connecting hole; the drill bit body comprises a connecting handle and a drill bit, the connecting handle is matched with the connecting hole, at least one kidney-shaped groove is formed in the side face of the drill bit, a clamping groove is formed in the end portion, away from the connecting handle, of the drill bit, and the center line of the clamping groove is overlapped with the center line of the drill bit; the guide wood is of a waist-shaped structure, and is in interference fit with the waist-shaped groove; the side of the cutter body is provided with a mounting through hole, and the cutter body is arranged in the clamping groove.

As a preferred embodiment of the self-guiding spade drill of the present utility model, wherein: the connecting handle passes through the screw hole through the screw and is connected with the drilling rod.

As a preferred embodiment of the self-guiding spade drill of the present utility model, wherein: the side of the connecting handle is provided with a groove, the groove is matched with the screw hole, the bottom surface of the groove is provided with two intersected inclined planes, and the bottom end of the screw is contacted with the two inclined planes of the groove.

As a preferred embodiment of the self-guiding spade drill of the present utility model, wherein: the side of drill bit has seted up the locating hole, the locating hole passes the draw-in groove, the drill bit passes through the reaming screw the locating hole with the installation through-hole with the cutter body is connected.

As a preferred embodiment of the self-guiding spade drill of the present utility model, wherein: the upper part of the positioning hole is a pin hole, and the lower part of the positioning hole is a threaded hole.

As a preferred embodiment of the self-guiding spade drill of the present utility model, wherein: the kidney-shaped grooves are circumferentially arranged at equal intervals.

As a preferred embodiment of the self-guiding spade drill of the present utility model, wherein: the end face, which is not contacted with the kidney-shaped groove, of the guide wood is arc-shaped.

As a preferred embodiment of the self-guiding spade drill of the present utility model, wherein: the end part of the drill bit, which is far away from the connecting handle, is in a round table shape.

As a preferred embodiment of the self-guiding spade drill of the present utility model, wherein: the end face of the drill rod is provided with a first central through hole, and the first central through hole is communicated with the connecting hole.

As a preferred embodiment of the self-guiding spade drill of the present utility model, wherein: the end face of the drill bit body is provided with a second central through hole, and the second central through hole is communicated with the clamping groove.

The beneficial effects of the utility model are as follows:

(1) According to the utility model, the self-guiding structure is added at the drill bit, so that the drill bit can be guided while being processed in the processing process, and the problem of connecting the eccentric hole and the inclined hole is solved.

(2) The utility model improves the processing precision and ensures that the end position of the inclined hole is atThe position degree requirement of the product is within, and the product qualification rate is improved.

(3) The utility model improves the hole wall roughness requirement of the drilling hole, and the roughness can reach Ra1.6.

Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the embodiments of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a self-steering spade drill according to an embodiment of the present utility model;

FIG. 2 is a partial schematic view of a self-steering spade drill according to an embodiment of the present utility model;

FIG. 3 is a schematic cross-sectional view of a drill rod according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a bit body according to an embodiment of the present utility model;

FIG. 5 is a schematic cross-sectional view of a bit body according to an embodiment of the present utility model;

FIG. 6 is a schematic view of a cutter body according to an embodiment of the present utility model;

fig. 7 is a side view of a guided wood according to an embodiment of the present utility model.

The marks in the figure: 1. a drill rod; 101. screw holes; 102. a connection hole; 103. a first central through hole; 2. a bit body; 201. a connecting handle; 202. a drill bit; 203. a kidney-shaped groove; 204. a clamping groove; 205. a groove; 206. positioning holes; 207. a second central through hole; 3. guiding wood; 4. a cutter body; 401. mounting through holes; 5. and (5) reaming a screw.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present utility model, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.

Example 1

As shown in fig. 1, the present embodiment provides a self-guiding spade drill, which includes a drill rod 1, a drill bit body 2, a guide wood 3, and a cutter body 4. As shown in fig. 3, a connecting hole 102 is formed in an end surface, a screw hole 101 is formed in a side surface of the drill rod 1, and a bottom end of the screw hole 101 is communicated with the connecting hole 102. As shown in fig. 4, the drill bit body 2 includes a connecting handle 201 and a drill bit 202, the connecting handle 201 is matched with the connecting hole 102, at least one kidney-shaped groove 203 is provided on the side surface of the drill bit 202, a clamping groove 204 is provided on the end of the drill bit 202 far away from the connecting handle 201, and the center line of the clamping groove 204 coincides with the center line of the drill bit 202. As shown in fig. 2, the guide wood 3 has a kidney-shaped structure, and the guide wood 3 is in interference fit with the kidney-shaped groove 203. As shown in fig. 6, the side surface of the cutter body 4 is provided with a mounting through hole 401, and the cutter body 4 is provided in the card slot 204. Through increasing the guide wood 3 structure, guarantee that drill bit 202 can realize processing and guide simultaneously in the course of working, improved machining precision and product percent of pass, can also improve the pore wall roughness requirement of drilling.

As shown in fig. 2, the connection shank 201 is connected to the drill rod 1 through the screw hole 101 by a screw. As shown in fig. 4, a groove 205 is formed on the side surface of the connecting handle 201, the groove 205 is matched with the screw hole 101, two intersected inclined planes are arranged on the bottom surface of the groove 205, and the bottom end of the screw is contacted with the two inclined planes of the groove 205. The screw and the inclined surface are matched for use, so that the drill bit body 2 can be prevented from rotating and reversely rotating, and the connecting handle 201 and the drill rod 1 can be connected more firmly.

As shown in fig. 4, a positioning hole 206 is formed in the side surface of the drill 202, the positioning hole 206 penetrates through the clamping groove 204, and as shown in fig. 2, the drill 202 is connected with the cutter body 4 through the positioning hole 206 and the mounting through hole 401 by the hinging screw 5. As shown in fig. 5, the upper portion of the positioning hole 206 is a pin hole, and the lower portion of the positioning hole 206 is a screw hole. The hinging screw 5 is connected with the pin hole to play a role in positioning, and the hinging screw 5 is connected with the threaded hole to play a role in connecting.

As shown in fig. 2, the kidney grooves 203 are circumferentially arranged at equal intervals. Because direction wood 3 and kidney slot 203 interference fit set up, and when kidney slot 203 equidistant circumference set up, direction wood 3 also is equidistant circumference setting, and kidney slot 203 and direction wood 3 all are provided with four in this embodiment, can guarantee that the atress of every direction wood 3 is even, realization direction function that can be better improves machining precision.

Meanwhile, as shown in fig. 7, the end surface of the guide wood 3, which is not in contact with the kidney groove 203, is arc-shaped, and in this embodiment, the guide wood 3 is made of wood. The circular arc structure is convenient to position and guide, and the machining precision can be further improved.

As shown in fig. 4, the end of the drill 202 remote from the shank 201 is in the shape of a truncated cone. The truncated cone-shaped structure can not only reduce stress concentration and strengthen the strength of the drill bit body 2, but also facilitate assembly.

As shown in fig. 3, the end surface of the drill rod 1 is provided with a first central through hole 103, and the first central through hole 103 is communicated with the connecting hole 102. As shown in fig. 5, the end face of the drill body 2 is provided with a second center through hole 207, and the second center through hole 207 communicates with the card slot 204. The cooling fluid may be sprayed through the first and second central through holes 103 and 207 toward the drilled area for cooling.

Example 2

The principle of this embodiment is the same as that of embodiment 1, with the main differences: in this embodiment, the guide wood 3 is made of copper. Since the copper guide wood 3 can increase the rigidity of the guide portion, the strength of the guide portion is enhanced in order to reduce the offset of the drilled hole along the axis in the drilling process with a large hole diameter.

The installation process comprises the following steps: after the connection handle 201 is fitted to the connection hole 102, the connection handle 201 is rotated so that the groove 205 corresponds to the screw hole 101, a screw is passed through the screw hole 101, and the screw bottom end is in contact with the groove 205. After the cutter body 4 is matched with the clamping groove 204, the mounting through holes 401 correspond to the positioning holes 206, the hinging screws 5 penetrate through the positioning holes 206 and the mounting through holes, and the hinging screws 5 are connected with the positioning holes 206. Finally, the guide wood 3 is installed in the kidney groove 203.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims

1. A self-guiding spade drill, comprising:

the drilling machine comprises a drilling rod (1), wherein a connecting hole (102) is formed in the end face of the drilling rod (1), a screw hole (101) is formed in the side face of the drilling rod (1), and the bottom end of the screw hole (101) is communicated with the connecting hole (102);

the drill bit comprises a drill bit body (2), wherein the drill bit body (2) comprises a connecting handle (201) and a drill bit (202), the connecting handle (201) is matched with the connecting hole (102), at least one waist-shaped groove (203) is formed in the side face of the drill bit (202), a clamping groove (204) is formed in the end portion, far away from the connecting handle (201), of the drill bit (202), and the central line of the clamping groove (204) coincides with the central line of the drill bit (202);

the guide wood (3) is of a kidney-shaped structure, and the guide wood (3) and the kidney-shaped groove (203) are in interference fit; and

the cutter body (4), installation through-hole (401) has been seted up to the side of cutter body (4), cutter body (4) set up in draw-in groove (204).

2. The self-steering spade drill according to claim 1, wherein: the connecting handle (201) is connected with the drill rod (1) through the screw hole (101) by a screw.

3. The self-steering spade drill according to claim 2, wherein: the side of the connecting handle (201) is provided with a groove (205), the groove (205) is matched with the screw hole (101), the bottom surface of the groove (205) is provided with two intersected inclined planes, and the bottom end of the screw is contacted with the two inclined planes of the groove (205).

4. The self-steering spade drill according to claim 1, wherein: the side of drill bit (202) has seted up locating hole (206), locating hole (206) pass draw-in groove (204), drill bit (202) pass through hinge screw (5) locating hole (206) with install through-hole (401) with cutter body (4).

5. The self-steering spade drill according to claim 4, wherein: the upper part of the positioning hole (206) is a pin hole, and the lower part of the positioning hole (206) is a threaded hole.

6. The self-steering spade drill according to claim 1, wherein: the kidney-shaped grooves (203) are circumferentially arranged at equal intervals.

7. The self-steering spade drill according to claim 1, wherein: the end surface of the guide wood (3) which is not contacted with the kidney-shaped groove (203) is arc-shaped.

8. The self-steering spade drill according to claim 1, wherein: the end part of the drill bit (202) far away from the connecting handle (201) is in a truncated cone shape.

9. The self-steering spade drill according to claim 1, wherein: the end face of the drill rod (1) is provided with a first central through hole (103), and the first central through hole (103) is communicated with the connecting hole (102).

10. The self-steering spade drill according to claim 1, wherein: a second central through hole (207) is formed in the end face of the drill bit body (2), and the second central through hole (207) is communicated with the clamping groove (204).