Boring cutter

Abstract

The utility model discloses a boring cutter which is characterized in that one end of a connecting shaft is clamped on a machine tool chuck, a through hole is formed in the connecting shaft, a mounting groove is formed in the through hole, a rotating shaft is rotatably supported in the mounting groove, and an external threaded pipe is fixed on the rotating shaft; the cutter bar is arranged in the through hole in a penetrating mode, a boring cutter head is fixed to one end of the cutter bar, and teeth are fixed to one side wall of the cutter bar and matched with the outer threaded pipe. According to the boring cutter, a cutter bar can move in the direction perpendicular to the axis of a connecting shaft, so that the rotating radius of a boring cutter head is changed, and then holes of different specifications are bored. By arranging the rotating shaft, the external threaded pipe and the teeth, the external threaded pipe can be driven to rotate by rotating the rotating shaft, the external threaded pipe can drive the cutter bar to move, the cutter bar can move flexibly, meanwhile, the cutter bar does not move relative to the connecting shaft in the rotating process, and the boring precision is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of mechanical processing, and more specifically to a boring tool. Background Art

[0002] When performing secondary processing of holes, it is necessary to use a boring tool to enlarge or fine bore the holes so that the inner diameter and inner wall roughness of the holes meet the specified requirements.

[0003] When using a boring tool to expand or fine bore a workpiece, different hole diameters often require the replacement of boring tools of different specifications. There are also boring tools on the market that can adjust the boring radius, but their structure is complex, the adjustment of the boring head is relatively cumbersome, and the distance between the boring head and the rotation axis cannot be accurately adjusted; the boring tool also vibrates greatly during rotation.

[0004] Therefore, how to provide a boring tool that can overcome the above problems is a problem that those skilled in the art need to solve urgently. Utility Model Content

[0005] In view of this, the utility model provides a boring tool.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A boring tool comprising:

[0008] A connecting shaft, one end of which can be coaxially clamped on a machine tool chuck, a through hole being provided on a side wall of the connecting shaft, a mounting groove being provided on a side wall of the through hole, a rotating shaft being rotatably supported in the mounting groove, the end of the rotating shaft passing through the outer wall of the connecting shaft, an externally threaded tube being coaxially sleeved and fixed on the rotating shaft, and an axis of the externally threaded tube being perpendicular to the axis of the connecting shaft;

[0009] A tool rod is slidably inserted into the through hole and a boring head is fixed at one end thereof. A plurality of teeth adapted to the threads of the externally threaded tube are evenly fixed on one side wall of the tool rod and along its length. The teeth cooperate with the externally threaded tube, and the length direction of the tool rod is perpendicular to the axial length direction of the connecting shaft.

[0010] It can be seen from the above technical solution that compared with the prior art, the utility model discloses a boring tool. The utility model specifically discloses a boring tool, the tool rod of which can move in a direction perpendicular to the axial center line of the connecting shaft, thereby changing the rotation radius of the boring head, and then realizing the boring of holes of different specifications; by setting a rotating shaft, an externally threaded tube and teeth, rotating the rotating shaft can drive the externally threaded tube to rotate, and rotating the externally threaded tube can drive the tool rod to move. The above structure is simple and the tool rod can move flexibly. At the same time, the tool rod will not produce relative movement with the connecting shaft during the rotation process, thereby ensuring the boring accuracy.

[0011] Preferably, a hexagonal blind hole is coaxially formed on one end wall of the rotating shaft, which makes it easier for the user to rotate the rotating shaft using a hexagonal wrench.

[0012] Preferably, the cross-section of the knife bar is rectangular, the teeth are fixed on a side surface of the knife bar perpendicular to the axis of the connecting shaft, and a first scale line is provided on a side surface of the knife bar parallel to the axis of the connecting shaft, and the first scale line is arranged along the length of the knife bar; a connecting plate is fixed to the side wall of the connecting shaft, and a second scale line is provided on one side surface of the connecting plate, and the second scale line is arranged along the length of the knife bar, and the surface of the connecting plate provided with the second scale line is flush with the side surface of the knife bar provided with the first scale line. The knife bar can be accurately moved to an appropriate distance.

[0013] Preferably, a hole is formed on the side wall of the connecting shaft and a tightening bolt is screwed therein, the axis of the tightening bolt being perpendicular to the axis of the connecting shaft, and the side surface of the knife bar provided with the scale mark 1 can abut against the tightening bolt. The knife bar does not move relative to the connecting shaft during rotation.

[0014] Preferably, the invention further comprises a reinforcing sleeve and a connecting bolt. The reinforcing sleeve can be coaxially sleeved on the connecting shaft. One end of the reinforcing sleeve is provided with a first clearance notch and a second clearance notch. The first clearance notch is provided with two and is symmetrically arranged about the centerline of the reinforcing sleeve. The two opposing side walls of the cutter bar each slide against the two opposing inner side walls of the first clearance notch. The tightening bolt can be limited inside the second clearance notch. The side wall of the connecting shaft is provided with a threaded hole. One end of the connecting bolt passes through the side wall of the reinforcing sleeve and then screws into the threaded hole. The cutter bar will abut against the two opposing inner side walls of the first clearance notch. During the boring operation, the reinforcing sleeve can improve the bending resistance of the cutter bar. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0016] Figure 1 It is an overall axonometric view of a boring tool;

[0017] Figure 2 It is an exploded axonometric diagram of a boring tool;

[0018] Figure 3 It is a partial axonometric diagram of a boring tool.

[0019] In the figure:

[0020] 1 is the connecting shaft, 10 is the through hole, 11 is the mounting groove, 2 is the rotating shaft, 20 is the hexagonal blind hole, 3 is the external threaded pipe, 4 is the tool rod, 40 is the scale line one, 5 is the boring head, 6 is the teeth, 7 is the connecting plate, 70 is the scale line two, 8 is the tightening bolt, 9 is the reinforcing sleeve, 90 is the clearance notch one, 91 is the clearance notch two, and 010 is the connecting bolt. DETAILED DESCRIPTION

[0021] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] The utility model discloses a boring tool, which specifically discloses a boring tool, wherein the tool rod 4 can move in a direction perpendicular to the axis of the connecting shaft 1, thereby changing the rotation radius of the boring head 5, and then realizing boring of holes of different specifications; by setting the rotating shaft 2, the externally threaded tube 3 and the teeth 6, rotating the rotating shaft 2 can drive the externally threaded tube 3 to rotate, and the rotation of the externally threaded tube 3 can drive the tool rod 4 to move, and the tool rod 4 can move flexibly. At the same time, the tool rod 4 will not produce relative movement with the connecting shaft 1 during the rotation process, thereby ensuring the boring accuracy; by setting the scale line 1 40 and the scale line 2 70, the tool rod 4 can be accurately moved to the required length; by setting the tightening bolt 8, the tightening bolt 8 can further tighten the tool rod 4, thereby ensuring the stability of the tool rod 4 during the rotation process; the tool rod 4 will abut against the two opposite inner side walls of the yield notch 1 90, and when performing the boring operation, the reinforcing sleeve 9 can improve the bending resistance of the tool rod 4.

[0023] Example

[0024] See attached Figure 1-3 The utility model is a schematic diagram of the overall and partial structures of an embodiment of the utility model. The utility model specifically discloses a boring tool, which is mainly used to enlarge or fine-process an existing hole on a workpiece. The boring tool includes:

[0025] Connecting shaft 1, the cross section of connecting shaft 1 is circular, one end of connecting shaft 1 can be coaxially clamped on the machine tool chuck, a through hole 10 with a rectangular cross section is opened on the side wall of connecting shaft 1, a rectangular mounting groove 11 is opened on one side hole wall of through hole 10, a rotating shaft 2 with a circular cross section is rotatably supported in the mounting groove 11, the end of the rotating shaft 2 passes through the outer wall of connecting shaft 1, an externally threaded tube 3 is coaxially sleeved and fixed on the rotating shaft 2, and the axis of the externally threaded tube 3 is perpendicular to the axis of the connecting shaft 1;

[0026] The tool rod 4, which has a rectangular cross section, is slidably inserted into the through hole 10 and has a boring head 5 fixed at one end. When the connecting shaft 1 is fixed and the workpiece is fed along the axial direction of the connecting shaft 1, or when the workpiece is fixed and the connecting shaft 1 is moved along its axial direction, the boring head 5 enters the hole already opened in the workpiece and expands or fine-bores the hole during the entry process.

[0027] The outer wall of the shank 4 is in close sliding contact with the wall of the through hole 10 to prevent the shank 4 from shaking in the through hole 10;

[0028] A plurality of teeth 6 are evenly fixed on one side wall of the tool rod 4 and along its length direction. The teeth 6 are adapted to the threads of the externally threaded tube 3. The externally threaded tube 3 cooperates with the teeth 6. Rotating the externally threaded tube 3 can drive the tool rod 4 to move. The length direction of the tool rod 4 is perpendicular to the axial length direction of the connecting shaft 1.

[0029] A hexagonal blind hole 20 is coaxially formed on the end wall of one end of the rotating shaft 2 . A hexagonal wrench can be inserted into the hexagonal blind hole 20 to drive the rotating shaft 2 to rotate, thereby realizing the movement of the knife rod 4 .

[0030] A tooth 6 is fixed on a side of the cutter bar 4 that is perpendicular to the axis of the connecting shaft 1. A scale line 40 is provided on a side of the cutter bar 4 that is parallel to the axis of the connecting shaft 1. The scale line 40 is arranged along the length direction of the cutter bar 4 and is arranged close to the side of the cutter bar 4.

[0031] A rectangular connecting plate 7 is fixed on the side wall of the connecting shaft 1, and a scale line 2 70 is provided on one side surface of the connecting plate 7. The scale line 2 70 is arranged along the length direction of the knife rod 4, and the scale line 2 70 is arranged close to the side edge of the connecting plate 7. The plate surface of the connecting plate 7 with the scale line 2 70 is flush with the side surface of the knife rod 4 with the scale line 1 40. One side wall of the connecting plate 7 is close to the side wall of the knife rod 4, and the scale line 1 40 and the scale line 2 70 are arranged adjacent to each other.

[0032] The distance between two adjacent scale lines 1 (40) is 1 mm, and there are 50 scale lines 2 (70) at equal intervals. The total length of the 50 scale lines 2 (70) is 49 mm. The distance between two adjacent scale lines 2 (70) is 0.98 mm, and the movement accuracy of the tool bar 4 is 0.02 mm.

[0033] Set the distance that the tool rod 4 moves relative to the rotating shaft 2 to be A, and the decimal value of distance A is an integer multiple of 0.02. The scale line 1 40 and the scale line 2 70 can be used to move the tool rod 4 by the distance A. The method of moving the tool rod 4 by the distance A is opposite to the reading method of the vernier caliper in the prior art. Specifically: first move the tool rod 4 in a certain direction so that the scale line 2 70 farthest from the connecting shaft 1 is aligned with the scale line 1 40 corresponding to the integer value of A; divide the decimal value of A by 0.02 to obtain a value B, and move the tool rod 4 again in the same direction as last time so that, starting from the scale line 2 70 farthest from the connecting shaft 1, the Bth scale line 2 70 is aligned with the scale line 1 40 closest to it. At this time, the adjustment of the movement distance of the tool rod 4 is completed;

[0034] A hole is opened on the side wall of the connecting shaft 1 and a tightening bolt 8 is screwed on. The axis of the tightening bolt 8 is perpendicular to the axis of the connecting shaft 1. The side of the knife rod 4 is provided with a scale line 40 and can abut against the tightening bolt 8. After the knife rod 4 is adjusted to the position, the tightening bolt 8 is tightened. The tightening bolt 8 can tighten the knife rod 4 and further limit the knife rod 4.

[0035] More specifically, the invention further includes a reinforcing sleeve 9 and a connecting bolt 010. The reinforcing sleeve 9 can be coaxially sleeved on the connecting shaft 1. One end of the reinforcing sleeve 9 is provided with a first clearance notch 90 and a second clearance notch 91. The first clearance notch 90 is provided with two and is symmetrically arranged about the centerline of the reinforcing sleeve 9. The two opposing side walls of the cutter bar 4 slide against the two opposing inner side walls of the first clearance notch 90. The rotating shaft 2 is positioned inside the first clearance notch 90, and the tightening bolt 8 can be positioned inside the second clearance notch 91. The side wall of the connecting shaft 1 is provided with a threaded hole. One end of the connecting bolt 010 passes through the side wall of the reinforcing sleeve 9 and then screws into the threaded hole. The cutter bar 4 will abut against the two opposing inner side walls of the first clearance notch 90. During the boring operation, the reinforcing sleeve 9 can improve the bending resistance of the cutter bar 4 and prevent the cutter bar 4 from bending and deformation due to excessive extension relative to the connecting shaft 1.

[0036] When the boring tool is in use, the first step is to adjust the position of the tool rod 4 relative to the connecting shaft 1. Rotating the rotating shaft 2 can drive the tool rod 4 to move. After the position of the tool rod 4 is adjusted, tighten the tightening bolt 8. The tightening bolt 8 will tighten the tool rod 4 to prevent it from moving and shaking; the second step is to install the reinforcing sleeve 9; the third step is to fix the connecting shaft 1 on the machine tool chuck. The farther the boring head 5 is from the connecting shaft 1, the larger the aperture of the boring tool expansion hole. When the connecting shaft 1 is in the middle position of the tool rod 4, the aperture of the boring tool expansion hole is the smallest.

[0037] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0038] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A boring tool, characterized in that: include: A connecting shaft (1), one end of which can be coaxially clamped on a machine tool chuck, a through hole (10) is provided on a side wall of the connecting shaft (1), a mounting groove (11) is provided on a side wall of the through hole (10), a rotating shaft (2) is rotatably supported in the mounting groove (11), an end of the rotating shaft (2) passes through the outer wall of the connecting shaft (1), an externally threaded tube (3) is coaxially sleeved and fixed on the rotating shaft (2), and an axis of the externally threaded tube (3) is perpendicular to the axis of the connecting shaft (1); A tool rod (4) is slidably inserted into the through hole (10) and a boring head (5) is fixed at one end thereof. A plurality of teeth (6) adapted to the threads of the externally threaded tube (3) are evenly fixed on a side wall of the tool rod (4) and along its length direction. The teeth (6) cooperate with the externally threaded tube (3). The length direction of the tool rod (4) is perpendicular to the axial length direction of the connecting shaft (1).

2. A boring tool according to claim 1, characterized in that: An inner hexagonal blind hole (20) is coaxially formed on an end wall of one end of the rotating shaft (2).

3. A boring tool according to claim 1, characterized in that: The cross-section of the knife rod (4) is rectangular. The teeth (6) are fixed on a side of the knife rod (4) that is perpendicular to the axis of the connecting shaft (1). A scale line 1 (40) is provided on a side of the knife rod (4) that is parallel to the axis of the connecting shaft (1). The scale line 1 (40) is arranged along the length direction of the knife rod (4). A connecting plate (7) is fixed on the side wall of the connecting shaft (1). A scale line 2 (70) is provided on one side of the connecting plate (7). The scale line 2 (70) is arranged along the length direction of the knife rod (4). The plate surface of the connecting plate (7) provided with the scale line 2 (70) is flush with the side surface of the knife rod (4) provided with the scale line 1 (40).

4. A boring tool according to claim 3, characterized in that: A hole is opened on the side wall of the connecting shaft (1) and a tightening bolt (8) is screwed thereon. The axis of the tightening bolt (8) is perpendicular to the axis of the connecting shaft (1). The side of the knife rod (4) provided with the scale line (40) can abut against the tightening bolt (8).

5. A boring tool according to claim 4, characterized in that: It also includes a reinforcing sleeve (9) and a connecting bolt (010), wherein the reinforcing sleeve (9) can be coaxially sleeved on the connecting shaft (1), and one end of the reinforcing sleeve (9) is provided with a first clearance notch (90) and a second clearance notch (91), wherein the first clearance notch (90) is provided with two and is symmetrically arranged about the center line of the reinforcing sleeve (9), and the two opposite side walls of the knife rod (4) are respectively in sliding contact with the two opposite inner side walls of the first clearance notch (90), and the tightening bolt (8) can be limited on the inner side of the second clearance notch (91); a threaded hole is provided on the side wall of the connecting shaft (1), and one end of the connecting bolt (010) is screwed into the threaded hole after passing through the side wall of the reinforcing sleeve (9).

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