Machining tool for reaming flat hole

Abstract

The utility model discloses a machining cutter for reaming a flat hole, which relates to the technical field of machining and comprises a cutter body and a cutter handle, and the rear end of the cutter body can be connected with a spindle interface of a machine tool through the cutter handle; the tool further comprises a drill tip and a blade, the drill tip is arranged at the center of the front end of the tool body, an avoiding groove is formed in the front end of the drill tip, a main cutting edge of the drill tip is arranged on one side of the avoiding groove, and the drill tip is used for positioning the center of a spot facing hole; a blade installation groove is formed in the front end of the cutter body and matched with the receding groove, and the blade is arranged on the side, close to the main cutting edge of the drill tip, in the blade installation groove and used for countersinking. According to the utility model, counter sinking can be directly carried out on a working surface, bottom hole punching and positioning in advance are not needed, and the processing quality and the processing efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a spot facing hole processing tool. Background Art

[0002] In the field of mechanical processing, almost all fastening holes need to be processed and flattened to ensure that the gasket can be placed flat and at the same time, improve the torque transmission capacity and fastening force of the fastener.

[0003] The traditional countersinking method is to drill the bottom hole first and then countersink the surface. The existing countersink drill needs to be positioned by a guide column on the premise of having a bottom hole before countersinking can be performed.

[0004] However, in the actual processing process, especially for the processing of countersinking holes in narrow spaces, the countersink drill bit needs to be extended into the narrow space for countersinking. Due to the long length of the drill bit and the lack of a centering hole on the working surface, the drill bit is prone to swing during drilling, resulting in eccentric drilling and poor processing quality. Utility Model Content

[0005] The utility model aims to provide a countersinking tool to solve the problems existing in the prior art, and can directly countersink on a working surface without the need for pre-drilling of base holes for positioning, thereby improving processing quality and processing efficiency.

[0006] To achieve the above purpose, the utility model provides the following solutions:

[0007] The utility model provides a countersinking tool, comprising a tool body and a tool handle, wherein the rear end of the tool body can be connected to a machine tool spindle interface through the tool handle; the utility model also comprises a drill tip and a blade, wherein the drill tip is arranged at the center of the front end of the tool body, and the front end of the drill tip is provided with an avoidance groove, one side of the avoidance groove is the main cutting edge of the drill tip, and the drill tip is used to locate the center of the countersinking hole; the front end of the tool body is provided with a blade mounting groove, the blade mounting groove matches the avoidance groove, the blade is arranged in the blade mounting groove on one side of the main cutting edge of the drill tip, and the blade is used for countersinking.

[0008] Preferably, the front portion of the blade body is a frustum structure, and the diameter of the frustum structure gradually decreases from front to back.

[0009] Preferably, a drill tip mounting hole is provided at the center of the front end of the cutter body, and the rear end of the drill tip can be inserted into the drill tip mounting hole.

[0010] Preferably, a first connecting screw is radially penetrated through the front end side wall of the cutter body, and the first connecting screw is used to fix the drill tip in the drill tip mounting hole.

[0011] Preferably, the first connecting screw is an M8 hexagon socket screw.

[0012] Preferably, the blade is an equilateral triangle blade, and three sides of the equilateral triangle blade are provided with cutting edges; the equilateral triangle blade can be embedded in the side wall of the blade mounting groove, and the middle part of the equilateral triangle blade can be fixed to the side wall of the blade mounting groove by a second connecting screw.

[0013] Preferably, the second connecting screw is an M4 hexagon socket screw.

[0014] Preferably, at least two avoidance grooves are provided at the front end of the drill tip, and the two avoidance grooves are respectively provided on both sides of the front end of the drill tip, and the two avoidance grooves are centrally symmetrical; the blade mounting groove is provided in a one-to-one correspondence with the avoidance grooves; at least two blades are provided, and the two blades are respectively provided in the two blade mounting grooves.

[0015] Preferably, an inner cooling hole is penetrated through the drill tip, the tool body and the tool handle, and the inner cooling hole is used to pass cutting coolant.

[0016] Preferably, the tool handle is a BT50 side-solid tool handle.

[0017] Compared with the prior art, the utility model has achieved the following technical effects:

[0018] The utility model provides a countersinking tool, comprising a tool body and a tool handle, a drill tip is arranged at the center of the front end of the tool body, an avoidance groove is arranged at the front end of the drill tip, one side of the avoidance groove is the main cutting edge of the drill tip, a blade mounting groove is also arranged at the front end of the tool body, the blade mounting groove matches the avoidance groove, and a blade is arranged on the side of the main cutting edge of the drill tip in the blade mounting groove; when in use, the rear end of the tool body is connected to the main axis interface of the machine tool through the tool handle, the center of the countersinking hole is firstly positioned on the working surface by the drill tip, and then the countersinking is directly performed on the working surface by the blade, without the need for pre-drilling of the base hole for positioning, thereby improving the processing quality and processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of a countersinking tool provided in an embodiment of the utility model;

[0021] Figure 2A schematic diagram of a knife body provided in an embodiment of the utility model;

[0022] Figure 3 A schematic diagram of a knife handle provided by an embodiment of the utility model;

[0023] Figure 4 A schematic diagram of the front end of a knife body provided by an embodiment of the utility model from a first angle;

[0024] Figure 5 A second angle schematic diagram of the front end of the knife body provided by the embodiment of the utility model;

[0025] Figure 6 A schematic diagram of a drill tip provided in an embodiment of the utility model;

[0026] Figure 7 A schematic diagram of a first connecting screw provided in an embodiment of the utility model;

[0027] Figure 8 A schematic diagram of a blade provided in an embodiment of the utility model;

[0028] Fig. 9 A schematic diagram of a second connecting screw provided in an embodiment of the utility model.

[0029] In the figure: 1- tool body, 2- tool handle, 3- drill tip, 301- drill tip mounting plane, 4- blade, 5- first connecting screw, 6- second connecting screw. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] The utility model aims to provide a countersinking tool to solve the problems existing in the prior art, and can directly perform countersinking on a working surface without the need for pre-drilling of base holes for positioning, thereby improving processing quality and processing efficiency.

[0032] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] like Figure 1-Figure 3As shown, this embodiment provides a countersinking tool, including a tool body 1 and a tool handle 2. The rear end of the tool body 1 can be connected to the machine tool spindle interface through the tool handle 2. In this embodiment, the tool handle 2 is preferably a BT50 side-fixed tool handle commonly seen on the market, and the tool body 1 and the tool handle 2 are connected by side-fixed mode; it also includes a drill tip 3 and a blade 4. The drill tip 3 is arranged at the center of the front end of the tool body 1, and an avoidance groove is arranged at the front end of the drill tip 3. One side of the avoidance groove is the main cutting edge of the drill tip 3. In this embodiment, as shown in FIG. Figure 4-Figure 5 As shown, the front end of the drill tip 3 is provided with two avoidance grooves, the two avoidance grooves are respectively arranged on both sides of the front end of the drill tip 3, and the two avoidance grooves are centrally symmetrical; the front end of the cutter body 1 is provided with two blade mounting grooves, the two blade mounting grooves are respectively matched with the two avoidance grooves, that is, the blade mounting groove and the corresponding avoidance groove are located on the same side, the positions of the two correspond, and the two side walls of the blade mounting groove extend respectively along the two side walls of the corresponding avoidance groove, and the shapes of the two correspond; in the present embodiment, two blades 4 are provided, and the two blades 4 are respectively arranged on one side of the main cutting edge of the drill tip 3 in the two blade mounting grooves.

[0034] When in use, the rear end of the tool body 1 is connected to the machine tool spindle interface through the tool handle 2. The center of the countersinking hole is first located on the working surface by the drill tip 3, and then the countersinking is directly performed on the working surface by the blade 4. There is no need to position the bottom hole in advance. The centering effect of the drill tip 3 ensures the flatness during processing, makes the blade 4 more stable during countersinking, and is less likely to have a skewed hole, thereby improving the processing quality and processing efficiency. In addition, the cutting residue in the processing process can be discharged through the avoidance groove and the blade installation groove, ensuring that there is no residual material left after processing.

[0035] In this embodiment, if Figure 2 As shown, the front part of the cutter body 1 is a frustum structure, and the diameter of the frustum structure gradually decreases from front to back. By designing the cutter body 1 to be thick at the front and thin at the back, the interference position at the rear of the cutter body 1 can be effectively avoided, and the flattening process in a narrow space can be achieved. At the same time, the rigidity of the cutter body 1 is guaranteed to a certain extent, reducing the problem of tool vibration during processing.

[0036] In this embodiment, a drill tip mounting hole is provided at the center of the front end of the cutter body 1, and the rear end of the drill tip 3 can be inserted into the drill tip mounting hole.

[0037] Furthermore, a first connecting screw 5 is radially penetrated on the front end side wall of the cutter body 1, and the first connecting screw 5 is used to fix the drill tip 3 in the drill tip mounting hole; in this embodiment, two first connecting screws 5 are provided, and accordingly, two first connecting holes are provided on the front end side wall of the cutter body 1, one in front and one in the back. Figure 6As shown, the rear end of the drill tip 3 is provided with a drill tip mounting plane 301. During installation, the rear end of the drill tip 3 is first inserted into the drill tip mounting hole on the cutter body 1, and then the two first connecting screws 5 are respectively screwed into the two first connecting holes to abut against the drill tip mounting plane 301, so as to realize the side-fixed fixation of the drill tip 3. The extended length of the drill tip 3 can also be adjusted according to actual needs.

[0038] In this embodiment, if Figure 7 As shown, the first connecting screw 5 is an M8 hexagon socket screw.

[0039] like Figure 8 As shown, the blade 4 in this embodiment is an equilateral triangle blade, and the three sides of the equilateral triangle blade are provided with cutting edges; the equilateral triangle blade can be embedded in the side wall of the blade mounting groove, and the middle part of the equilateral triangle blade can be fixed to the side wall of the blade mounting groove by a second connecting screw 6; by designing the shape of the blade 4 as an equilateral triangle, the blade 4 can be rotated for use, that is, each blade 4 can be used three times, which effectively reduces the cost of the blade 4.

[0040] In this embodiment, if Fig. 9 As shown, the second connecting screw 6 is an M4 hexagon socket screw.

[0041] In this embodiment, an inner cooling hole is penetrated through the drill tip 3, the tool body 1 and the tool handle 2. The inner cooling hole is used to pass cutting coolant to play a cooling role during processing. At the same time, the drill tip 3 is not easy to disassemble due to long-term use. The inner cooling hole penetrated through the tool body 1 can also be used as a disassembly hole for the drill tip 3. For example, after the two first connecting screws 5 are unscrewed, a thin rod is inserted from the back to the front into the inner cooling hole of the tool body 1 to poke out the drill tip 3, which is convenient for disassembly and replacement of the drill tip 3.

[0042] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A spot facing tool, comprising a tool body and a tool handle, wherein the rear end of the tool body can be connected to a machine tool spindle interface through the tool handle; characterized in that: It also includes a drill tip and a blade, wherein the drill tip is arranged at the center of the front end of the cutter body, and an avoidance groove is arranged at the front end of the drill tip, one side of the avoidance groove is the main cutting edge of the drill tip, and the drill tip is used to locate the center of the countersinking hole; the front end of the cutter body is provided with a blade mounting groove, the blade mounting groove matches the avoidance groove, the blade is arranged in the blade mounting groove on one side of the main cutting edge of the drill tip, and the blade is used for countersinking.

2. The spot facing tool according to claim 1, characterized in that: The front part of the knife body is a frustum structure, and the diameter of the frustum structure gradually decreases from front to back.

3. The spot facing tool according to claim 2, characterized in that: A drill tip mounting hole is arranged at the front center of the cutter body, and the rear end of the drill tip can be inserted into the drill tip mounting hole.

4. The spot facing tool according to claim 3, characterized in that: A first connecting screw is radially penetrated on the front end side wall of the cutter body, and the first connecting screw is used to fix the drill tip in the drill tip mounting hole.

5. The spot facing tool according to claim 4, characterized in that: The first connecting screw is an M8 hexagon socket screw.

6. The spot facing tool according to claim 1, characterized in that: The blade is an equilateral triangle blade, and the three sides of the equilateral triangle blade are all provided with cutting edges; the equilateral triangle blade can be embedded in the side wall of the blade mounting groove, and the middle part of the equilateral triangle blade can be fixed to the side wall of the blade mounting groove by a second connecting screw.

7. The spot facing tool according to claim 6, characterized in that: The second connecting screw is an M4 hexagon socket screw.

8. The spot facing tool according to claim 1, characterized in that: At least two avoidance grooves are provided at the front end of the drill tip, and the two avoidance grooves are respectively provided on both sides of the front end of the drill tip, and the two avoidance grooves are centrally symmetrical; the blade mounting groove is provided in a one-to-one correspondence with the avoidance grooves; at least two blades are provided, and the two blades are respectively provided in the two blade mounting grooves.

9. The spot facing tool according to claim 1, characterized in that: An inner cooling hole is passed through the drill tip, the tool body and the tool handle, and the inner cooling hole is used to pass cutting coolant.

10. The spot facing tool according to any one of claims 1 to 9, characterized in that: The tool handle is a BT50 side-solidified tool handle.

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