A kind of boring tool fixing device

Abstract

The cam is secured to the outer wall of the borehole and is adapted to engage the borehole of the drill bit and to engage the guide rail when the drill bit is engaged.

Description

Technical Field

[0001] The invention relates to the technical field of shipbuilding, in particular to a boring tool fixing device. Background Art

[0002] During the construction of long-axis vessels, the shafting stern frame and stern tube need to be bored to ensure that the inner bore of the stern frame and stern tube meets the requirements for underwater bearing installation. Taking a certain type of ship as an example, according to the boring requirements, a stop with a radial depth of 9.5±0.50mm must be bored at the rear end of the bearing mounting position of the stern frame and stern tube to install the sealing ring. The process requires that the cutting amount of fine boring be controlled within the range of 0.1-0.2mm. The existing method of adjusting the feed rate mainly relies on the use of a feeler gauge: after boring one circle, the boring tool is withdrawn, and a feeler gauge with a thickness of 0.2mm is placed on the tip of the tool. The tool is then attached to the end face of the stern frame with a magnetic base, pressing the feeler gauge at the bottom. The feeler gauge is then withdrawn and the boring tool is moved until the tip of the tool is against the magnet as the bottom, achieving a radial feed of 0.2mm. The disadvantage of this method is that the manual operation error is large. Whether the tool tip is against the feeler gauge and the magnetic seat is entirely judged by the worker by feeling. Too tight or too loose can easily cause the feed amount to exceed the tolerance, and the processing size does not meet the requirements. Summary of the Invention

[0003] The purpose of the present invention is to provide a boring tool fixing fixture, which can accurately control the feed amount of each rough boring and fine boring, and precisely control the cutting amount to improve the boring processing accuracy.

[0004] The cam is secured to the tool holder by means of a locking mechanism, and the locking mechanism is secured on a central portion of the tool holder's upper portion for locking the tool holder in a manner that allows the tool holder to move freely in the tool holder's upper portion.

[0005] As a preferred solution of the present invention, an outer locking ring is provided on the connecting inner cylinder, and the outer locking ring is threadedly connected to the connecting inner cylinder and is tightly pressed against the bottom surface of the adjusting outer cylinder.

[0006] As a preferred solution of the present invention, a hexagonal countersunk hole is provided on the outer wall of the outer locking ring, a hexagonal countersunk hole is provided on the top of the inner locking ring, and a hexagonal countersunk hole is provided on the outer wall of the adjusting outer cylinder.

[0007] As a preferred solution of the present invention, the upper part of the boring tool fixing rod is provided with a mounting hole radially passing through the boring tool fixing rod, the side wall of the boring tool fixing rod is provided with a first fixing hole connected to the mounting hole, and the first fixing bolt is threadedly connected to the first fixing hole and tightens the boring tool set on the mounting hole.

[0008] As a preferred solution of the present invention, a prismatic matching rod is provided at the lower portion of the boring tool fixing rod, and a matching cavity matching the shape of the matching rod is provided in the connecting inner cylinder.

[0009] As a preferred solution of the present invention, a second fixing hole communicating with the matching cavity is opened on the lower side wall of the connecting inner cylinder, and a second fixing bolt is threadedly connected to the second fixing hole and tightens the matching rod arranged in the matching cavity.

[0010] As a preferred solution of the present invention, the pitch of the internal thread segment is 1 mm.

[0011] Compared with the prior art, the boring tool fixing device of the embodiment of the present invention has the following beneficial effects:

[0012] After the boring hole and the boring tool fixing fixture are assembled, the scale value of the adjusting outer cylinder scale that is aligned with the indicator mark on the boring tool fixing rod at the beginning is recorded. After the boring operation is started and one circle is bored, the inner locking ring is loosened according to the feed amount requirement, and the adjusting outer cylinder is rotated to adjust the height of the adjusting outer cylinder and the boring tool fixing rod as a whole extending on the connecting inner cylinder. After the feed amount adjustment is completed, the inner locking ring is tightened again. When the adjusting outer cylinder rotates one circle, the indicator mark on the boring tool fixing rod is still aligned with the scale value of the adjusting outer cylinder scale that was previously aligned, and the displacement between the adjusting outer cylinder and the connecting inner cylinder is one pitch of the internal thread segment. The rotation angle of the adjusting outer cylinder is adjusted according to the actual feed amount requirement, so as to facilitate and accurately control the rough boring feed amount and the fine boring feed amount each time until the fine processing of the stop position is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below.

[0014] Figure 1 A schematic structural diagram of a boring tool fixing fixture provided by the present invention in its initial state;

[0015] Figure 2 A schematic diagram of the structure of a boring tool fixing fixture provided by the present invention after adjusting the feed amount;

[0016] Figure 3 A schematic structural diagram of a boring tool fixing rod provided by the present invention;

[0017] Figure 4 A top view of the adjustment outer cylinder provided by the present invention;

[0018] In the figure, the mounting base 1; the connecting inner cylinder 2; the second fixing bolt 21; the adjusting outer cylinder 3; the boss 31; the scale 32; the inner locking ring 4; the boring tool fixing rod 5; the indicator mark 51; the positioning protrusion 52; the matching rod 53; the first fixing bolt 54; the mounting hole 55; the first fixing hole 56; the outer locking ring 6; and the boring tool 7. DETAILED DESCRIPTION

[0019] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0020] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "front", "back", "top", "bottom", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0021] like Figures 1 to 4 As shown, a boring tool fixing device of a preferred embodiment of the present invention comprises a mounting base 1, a connecting inner cylinder 2, an adjusting outer cylinder 3, an inner locking ring 4 and a boring tool fixing rod 5. The mounting base 1 is connected to the tool holder of the boring machine by bolts, the connecting inner cylinder 2 is arranged on the mounting base 1, the lower part of the inner cavity of the adjusting outer cylinder 3 is provided with an internal thread section that is threadedly connected to the outer wall of the connecting inner cylinder 2, and the middle part of the inner cavity of the adjusting outer cylinder 3 is provided with a boss 31 that cooperates with the positioning protrusion 52. The boring tool fixing rod 5 is provided with a positioning protrusion 52 arranged around its outer circumference, and the inner locking ring 4 is sleeved on the boring tool fixing rod 5. The outer wall of the inner locking ring 4 is threadedly connected to the upper part of the inner cavity of the adjusting outer cylinder 3 and the positioning protrusion 52 is pressed against the boss 31. The boring tool 7 is installed on the upper part of the boring tool fixing rod 5. The top surface of the adjusting outer cylinder 3 is provided with a scale 32, and the outer side wall of the boring tool fixing rod 5 is provided with an indicator mark 51 for indicating the scale value.

[0022] When the boring tool is bored, the guide rail 5 is tightened and the screw thread is tightened, so that the guide rail 5 is tightened and the screw thread is tightened. When the boring tool is bored, the guide rail 5 is tightened and the screw thread is tightened, so that the guide rail 5 is tightened and the screw thread is tightened. When the boring tool is bored, the guide rail 5 is tightened and the screw thread is tightened, so that the guide rail 5 is tightened and the screw thread is tightened.

[0023] Furthermore, an outer locking ring 6 is provided on the connecting inner cylinder 2, and the outer locking ring 6 is threadedly connected to the connecting inner cylinder 2 and pressed against the bottom surface of the adjusting outer cylinder 3. In this way, the adjusting outer cylinder 3 is firmly fixed to the connecting inner cylinder 2 through the cooperation of the outer locking ring 6 and the inner locking ring 4, thereby preventing the adjusting outer cylinder 3 from loosening during the boring process and affecting the position of the boring tool 7.

[0024] Furthermore, a hexagonal countersunk hole is provided on the outer wall of the outer locking ring 6, a hexagonal countersunk hole is provided on the top of the inner locking ring 4, and a hexagonal countersunk hole is provided on the outer wall of the adjusting outer cylinder 3. In order to facilitate assembly, a hexagonal wrench is used to tighten or loosen the outer locking ring 6, the inner locking ring 4 and the adjusting outer cylinder 3.

[0025] Illustratively, the upper portion of the boring tool fixing rod 5 is provided with a mounting hole 55 radially passing through the boring tool fixing rod 5, and the side wall of the boring tool fixing rod 5 is provided with a first fixing hole 56 connected to the mounting hole 55. The first fixing bolt 54 is threadedly connected to the first fixing hole 56 and presses the boring tool 7 set on the mounting hole 55, which facilitates the installation and fixation of the boring tool 7.

[0026] For example, a prismatic mating rod 53 is provided at the lower portion of the boring tool fixing rod 5, and a mating cavity that matches the shape of the mating rod 53 is provided in the connecting inner cylinder 2. This ensures that the boring tool fixing rod 5 is vertically raised and lowered when the position is adjusted, and the boring tool fixing rod 5 will not rotate, thereby ensuring high accuracy in adjusting the feed amount.

[0027] Furthermore, a second fixing hole communicating with the mating cavity is provided on the lower side wall of the connecting inner cylinder 2. Two second fixing holes are provided and are respectively arranged on both sides of the connecting inner cylinder 2. A second fixing bolt 21 is threadedly connected to the second fixing hole and tightens the mating rod 53 arranged in the mating cavity, which can improve the fixing effect of the boring tool fixing rod 5.

[0028] Exemplarily, the pitch of the internal thread segment is 1 mm. Specifically, the scale value on the scale ruler 32 of the outer cylinder 3 indicates the axial movement distance of the outer cylinder 3 relative to the inner cylinder 2, effectively controlling the feed amount each time to 1 mm for rough boring and 0.1 mm to 0.2 mm for fine boring.

[0029] After the cam 5 is tightened, the outer locking ring 6 is tightened to the inner cavity of the adjusting outer cylinder 3 and the positioning protrusion 52 is pressed against the boss 31; the boring tool 7 is installed on the mounting hole 55 of the boring tool fixing rod 5; after the assembly is completed, the extension length of the boring tool 7 is adjusted according to the actual feed amount required.

[0030] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0031] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A boring tool fixing device, characterized in that: The cam is provided with a screw thread on the top of the adjusting sleeve and a screw thread on the bottom of the adjusting sleeve, and the screw thread on the adjusting sleeve is fixed with the cam face to form a circle around the cam face.

2. The boring tool fixing fixture according to claim 1, characterized in that: An outer locking ring is provided on the connecting inner cylinder. The outer locking ring is threadedly connected to the connecting inner cylinder and is tightly pressed against the bottom surface of the adjusting outer cylinder.

3. The boring tool fixing fixture according to claim 2, characterized in that: A hexagonal countersunk hole is provided on the outer wall of the outer locking ring, a hexagonal countersunk hole is provided on the top of the inner locking ring, and a hexagonal countersunk hole is provided on the outer wall of the adjusting outer cylinder.

4. The boring tool fixing fixture according to claim 1, characterized in that: The upper part of the boring tool fixing rod is provided with a mounting hole which radially passes through the boring tool fixing rod, and the side wall of the boring tool fixing rod is provided with a first fixing hole which is connected with the mounting hole, and a first fixing bolt is threadedly connected with the first fixing hole and presses the boring tool arranged on the mounting hole tightly.

5. The boring tool fixing fixture according to claim 1, characterized in that: A prismatic matching rod is provided at the lower portion of the boring tool fixing rod, and a matching cavity matching the shape of the matching rod is provided in the connecting inner cylinder.

6. The boring tool fixing fixture according to claim 5, characterized in that: A second fixing hole communicating with the matching cavity is formed on the lower side wall of the connecting inner cylinder. A second fixing bolt is threadedly connected to the second fixing hole and presses the matching rod disposed in the matching cavity tightly.

7. The boring tool fixing fixture according to any one of claims 1 to 6, characterized in that: The pitch of the internal thread section is 1 mm.

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