Floating boring cutter for machining center shaft assembly of rotary steering measuring instrument

Abstract

The invention discloses a floating boring cutter for machining a central shaft assembly of a rotary steering measuring instrument, which relates to the technical field of central shaft assembly machining and comprises a cylindrical cutter handle, a detachable gasket and a floating boring cutter. A connecting cover is rotationally arranged at the rear end of the knife handle; the floating boring cutter is arranged in the front end boring cutter installation cavity and can slide in the radial direction, a circulation hole is formed in the center of the floating boring cutter, and the floating boring cutter is in sliding fit with the protruding block in the installation cavity through the installation groove. A fluid channel is formed in the axis of the cutter handle, a fluid circulation groove communicated with the fluid channel is formed in the front end of the cutter handle, and scrap circulation grooves extending in the axial direction are formed in the circumferential surfaces of the cutter handle and the gasket. And the connecting cover is connected with fluid conveying equipment through a connecting hose. The boring cutter automatically compensates coaxiality deviation of the main shaft and a workpiece hole through the floating structure, corrects hole shaft bending and position degree errors, realizes cooling and forced chip removal through the fluid channel, prevents chips from scratching a hole wall, improves machining precision and surface quality, and prolongs the service life of the cutter.

Description

Technical Field

[0001] This invention relates to the field of central shaft assembly machining technology, specifically a floating boring tool for machining the central shaft assembly of a rotary guide measuring instrument. Background Technology

[0002] In the manufacturing process of precision equipment such as rotary guide measuring instruments, the machining accuracy requirements for the central shaft assembly of the holes are extremely high. Traditional boring methods, such as those using rigid boring tools, have very strict requirements for the coaxiality of the machine tool spindle and the workpiece hole. However, after rough boring and deep hole drilling, the hole shaft often has a certain degree of bending and positional deviation. If a rigid boring tool is used for finishing, it is easy to cause poor machining quality due to the inability to compensate for these deviations, or even damage to the tool or workpiece. In addition, during the boring process, a large amount of heat and chips are generated in the cutting area. If they cannot be discharged in time, it will not only accelerate tool wear, but also affect the surface roughness of the hole wall, making it difficult to meet the requirements of high-precision machining. Summary of the Invention

[0003] To address the aforementioned technical problems, the present invention provides the following technical solution: a floating boring tool for machining the central shaft assembly of a rotary guide measuring instrument, comprising: The knife handle is cylindrical with a conical front end and a rotatable connecting cap at its rear end.

[0004] Gaskets are detachably and symmetrically disposed on the circumferential surface of the tool holder via mounting bolts.

[0005] A floating boring bar is disposed in a boring bar mounting cavity near one end of the cone and can slide radially along the tool holder. A flow hole penetrating its two opposing surfaces is provided at the center of the floating boring bar.

[0006] The floating boring bar is provided with a mounting groove, which slides in engagement with the protrusions on the two side walls of the boring bar mounting cavity in the axial direction.

[0007] A fluid channel is provided at the axis of the tool holder, penetrating its front end face. A fluid flow groove is provided at the front end of the tool holder, and the fluid flow groove passes through the inclined surface of the cone and communicates with the fluid channel.

[0008] The circumferential surface of the tool holder is provided with a chip flow groove that extends axially and penetrates both end faces, and the arc surface of the gasket is also provided with the chip flow groove.

[0009] The connecting cover is provided with a connecting hose for connecting to fluid transport equipment.

[0010] Furthermore, the fluid channel is connected to the connecting hose through a fluid hole inside the connecting cover.

[0011] Furthermore, the gasket is fitted to the circumferential surface of the tool holder and fixed by the mounting bolt to limit the radial displacement of the tool holder.

[0012] Furthermore, the debris flow groove is a straight groove formed along the surface of the tool holder and the gasket.

[0013] The advantages of this invention compared to the prior art are: To improve machining accuracy, the tool holder is clamped at the rear end of the boring machine, and the connecting cover is connected to a fluid delivery device via a connecting hose. During boring, the tool holder drives the floating boring tool to rotate. The floating boring tool can slide freely in the radial direction of the tool holder through the sliding engagement of the mounting groove and the protrusion. This structure can automatically compensate for the misalignment between the machine tool spindle rotation center and the workpiece center, effectively correcting the hole shaft bending and positional deviation caused by the previous process, and improving machining accuracy.

[0014] To ensure machining quality and protect the cutting tool, the fluid delivery system pressurizes and delivers fluids such as air or cutting fluid to the fluid channel. A portion of the fluid flows through the flow holes on the floating boring bar to the front end of the tool holder, and is ejected from the gap between the floating boring bar and the tool holder; another portion of the fluid is ejected from the fluid flow groove at the front end of the tool holder. The ejected fluid cools the floating boring bar and simultaneously flushes cutting debris into the debris flow groove, from which it is discharged from the rear end of the tool holder. This process effectively prevents debris from scratching the machined hole wall, ensuring the roughness of the hole's inner wall, and extending the service life of the floating boring bar. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 This is a partial structural diagram of the present invention.

[0017] Figure 3 Cross-sectional view of the overall structure of the present invention Figure 1 .

[0018] Figure 4 Cross-sectional view of the overall structure of the present invention Figure 2 .

[0019] Figure 5 This is a partial structural diagram of the floating boring tool of the present invention. Figure 1 .

[0020] Figure 6 This is a partial structural diagram of the floating boring tool of the present invention. Figure 2 .

[0021] Figure 7 This is a partial structural diagram of the gasket of the present invention.

[0022] Reference numerals: 1. Tool holder; 2. Gasket; 3. Floating boring bar; 4. Connecting cover; 5. Flow hole; 6. Mounting groove; 7. Mounting bolt; 8. Fluid flow groove; 9. Fluid channel; 10. Debris flow groove; 11. Boring bar mounting cavity; 12. Connecting hose; 13. Fluid hole. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figures 1 to 7 As shown, a floating boring tool for machining the central shaft assembly of a rotary guide measuring instrument mainly includes a tool holder 1, a shim 2, and a floating boring tool 3. The tool holder 1 is generally cylindrical, with its front end ( Figure 1 The left end of the tool holder 1 is designed in a conical shape to facilitate guiding and entering the workpiece. Figure 1 The right end of the handle 1 is rotatably provided with a connecting cover 4, which is used to connect to an external fluid supply. Two gaskets 2 are detachably and symmetrically mounted on the circumferential surface of the handle 1 via mounting bolts 7. The gaskets 2 fit against the handle 1, and their main function is to cooperate with the handle 1 to limit its radial movement.

[0025] like Figures 1 to 7 As shown, a boring bar mounting cavity 11 is formed at the cone near the front end of the tool holder 1. The floating boring bar 3 is disposed in the boring bar mounting cavity 11 and can slide along the radial direction of the tool holder 1. Specifically, the floating boring bar 3 has a mounting groove 6, which forms a sliding fit with the protrusions on the two side walls of the boring bar mounting cavity 11 in the axial direction, thereby guiding the radial movement of the floating boring bar 3 and preventing its circumferential rotation.

[0026] like Figures 1 to 7 As shown, this device is designed with multiple fluid channels to achieve cooling and chip removal. A flow hole 5 is formed at the center of the floating boring bar 3, penetrating its two opposing surfaces. A fluid channel 9 is formed axially at the axis of the tool holder 1, penetrating its front end face. A fluid flow groove 8 is also formed on the tapered inclined surface at the front end of the tool holder 1, arranged in a circular array along the axis of the tool holder 1, and connected to the internal fluid channel 9. Furthermore, a chip flow groove 10 is formed on the circumferential surface of the tool holder 1, extending axially and penetrating its two end faces; correspondingly, the same chip flow groove 10 is formed on the arcuate surface of the gasket 2.

[0027] like Figures 1 to 7As shown, a connecting hose 12 is provided on the connecting cover 4, which is used to connect to the output end of an external fluid delivery device (such as a pump). A fluid hole 13 is provided on the handle 1 at the connecting cover 4, which connects the connecting hose 12 to the fluid channel 9 of the handle 1.

[0028] The work process is as follows: The rear end of the tool holder 1 is clamped onto the spindle of the boring machine, and the connecting hose 12 is connected to the fluid delivery device. The boring machine is started, and the tool holder 1 rotates, driving the floating boring bar 3 to perform finishing on the hole of the central shaft assembly. During the machining process, the floating boring bar 3, due to its radial floating characteristic, can automatically compensate for the coaxiality error between the machine tool spindle and the workpiece hole, and correct the hole shaft bending or positional deviation left over from the previous process.

[0029] Simultaneously, the fluid delivery device delivers pressurized fluid (such as compressed air or cutting fluid) into the fluid channel 9 through the connecting hose 12 and the fluid hole 13. The fluid flows forward in the fluid channel 9, with a portion flowing through the flow hole 5 in the center of the floating boring bar 3 to the front end of the tool holder 1 and being ejected from the tiny gap between the floating boring bar 3 and the tool holder 1; the other portion of the fluid is ejected from the fluid flow groove 8 at the front end of the tool holder 1.

[0030] The ejected fluid serves a dual purpose: first, it cools the high-speed rotating, heat-generating floating boring bar 3; second, it flushes the metal chips cut by the floating boring bar 3 into the chip flow channel 10. The fluid, carrying the chips, flows along the chip flow channel 10 towards the rear end of the tool holder 1, and finally exits the machining area from the end near the connecting cover 4. This forced chip removal method effectively prevents chip accumulation in the hole, avoids chips scratching the machined hole wall, ensures the required roughness of the hole wall, and also extends the service life of the floating boring bar 3 due to excellent cooling and chip removal.

[0031] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A floating boring tool for machining the central shaft assembly of a rotary guide measuring instrument, characterized in that, include: The handle (1) is cylindrical with a conical front end and a connecting cover (4) rotatably mounted on its rear end. The gasket (2) is detachably and symmetrically disposed on the circumferential surface of the tool holder (1) by means of mounting bolts (7); A floating boring bar (3) is set in a boring bar mounting cavity (11) near one end of the cone and can slide radially along the tool holder (1). A flow hole (5) is provided at the center of the floating boring bar (3) through its two opposing surfaces. The floating boring bar (3) is provided with a mounting groove (6), and the mounting groove (6) is slidably engaged with the protrusions on the two side walls of the boring bar mounting cavity (11) in the axial direction; The tool holder (1) has a fluid channel (9) that passes through its front end face at the axis of the tool holder (1), and a fluid flow groove (8) is provided at the front end of the tool holder (1). The fluid flow groove (8) passes through the inclined surface of the cone and communicates with the fluid channel (9). The circumferential surface of the tool holder (1) is provided with a chip flow groove (10) that extends axially and penetrates its two end faces, and the arc surface of the gasket (2) is also provided with the chip flow groove (10). The connecting cover (4) is provided with a connecting hose (12) for connecting to a fluid conveying device.

2. The floating boring tool for machining the central shaft assembly of a rotary guide measuring instrument according to claim 1, characterized in that: The fluid channel (9) is connected to the connecting hose (12) through the fluid hole (13) in the connecting cover (4).

3. The floating boring tool for machining the central shaft assembly of a rotary guide measuring instrument according to claim 1, characterized in that: The gasket (2) is fitted to the circumferential surface of the handle (1) and fixed by the mounting bolt (7) to limit the radial displacement of the handle (1).

4. The floating boring tool for machining the central shaft assembly of a rotary guide measuring instrument according to claim 1, characterized in that: The debris flow groove (10) is a straight groove formed along the surface of the tool holder (1) and the gasket (2).

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