Tool for cutting the intersection edge of the inner hole of a three-way joint

Abstract

Tool for cutting the intersecting line edge of the inner hole of a tee joint, comprising a rotating sleeve, a fixing rod, and a countersinking cutter; the rotating sleeve is of a sleeve structure, with a disc operating handle provided at the upper end of the sleeve, the disc operating handle is provided with a central hole, the inner hole of the sleeve communicates with the central hole of the disc operating handle, the inner hole of the sleeve is a special-shaped cross-section hole, including a semi-circular fixing rod through-hole and a rectangular countersinking cutter through-hole combined together; a limiting boss is provided at the upper end of the fixing rod, and a profiling pin assembly hole cooperating with the tool cutting trajectory guiding mechanism is provided above the limiting boss, and the fixing rod is assembled in the semi-circular fixing rod through-hole of the rotating sleeve; the countersinking cutter is a long strip-shaped rod, and its upper end is hinged and assembled with the inner side wall of the rotating sleeve through a pin shaft, and an arc-shaped groove edge is provided at the lower end of the countersinking cutter. The present invention realizes the cutting treatment of the intersecting line edge of the inner hole of the tee joint, achieving the purpose of making the intersecting line edge have a smooth transition and meeting the accuracy requirements of its transition arc surface.

Description

Technical Field

[0001] The present invention relates to a cutting tool, in particular to a cutting tool for removing the intersecting edge of the inner hole of a tee joint. Background Art

[0002] The tee joint is an indispensable part in the hydraulic oil circuit of an aircraft. There are multiple tee joints in the entire hydraulic control oil circuit of the aircraft. As shown in the attached Figure 1 A tee joint 1 applied to the hydraulic oil circuit of an aircraft is shown. At the intersection of its internal horizontal hole 1-1 and vertical hole 1-2, a sharp intersecting edge 1-3 is formed. The rubber seal inside the tee joint 1 is often scratched by the intersecting edge 1-3 during the assembly process. The falling rubber debris contaminates the oil fluid system, posing a safety hazard to the flight of the aircraft. To solve the above problems, it is necessary to process the intersecting edge 1-3 of the inner hole of the tee joint 1 to make the edge of the intersecting line smoothly transition, and ensure that the transition arc surface meets the precision requirements of R being 0.1 - 0.3 mm and the surface roughness Ra being 0.8.

[0003] As shown in the attached Figure 2 To ensure that the transition arc surface meets the precision requirements after the intersecting edge 1-3 of the inner hole of the tee joint 1 is removed, technicians have designed a special device for removing the intersecting edge of the inner hole of the tee joint. This intersecting-edge cutting device realizes the cutting process of the intersecting edge 1-1 of the inner hole of the tee joint 1 through the cooperation of a workpiece clamping and positioning mechanism 2, a cutting tool 3, a cutting trajectory guiding mechanism 4 for the cutting tool, a measuring mechanism 5 for the axial movement distance of the cutting tool, and a feed rate control mechanism 6 for the cutting tool, so that the intersecting edge 1-1 smoothly transitions. Therefore, it is also necessary to optimize the specific structure of the cutting tool assembly 3. Summary of the Invention

[0004] The present invention provides a cutting tool for removing the intersecting edge of the inner hole of a tee joint, which is used to realize the cutting process of the intersecting edge of the inner hole of the tee joint, and achieve the purpose of making the intersecting edge smoothly transition and meeting the precision requirements of its transition arc surface.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] Tool for removing the intersection line edge of the inner hole of a tee joint, comprising a rotating sleeve, a fixing rod and a countersinking cutter; the rotating sleeve is of a sleeve structure, with a disc operating handle provided at the upper end of the sleeve, the disc operating handle is provided with a central hole, the inner hole of the sleeve is communicated with the central hole of the disc operating handle, the inner hole of the sleeve is a special-shaped cross-section hole, including a semicircular fixing rod through-hole and a rectangular countersinking cutter through-hole combined together; the rod body of the fixing rod is a semicircular rod, with a limiting boss provided at its upper end, and a profiling pin assembly hole for cooperating with the tool cutting trajectory guiding mechanism is provided above the limiting boss, and the fixing rod is fitted in the semicircular fixing rod through-hole of the rotating sleeve; the countersinking cutter is a long strip-shaped rod, the upper end of which is hinged and assembled with the inner side wall of the rotating sleeve through a pin shaft, and an arc-shaped groove edge is provided at the lower end of the countersinking cutter, and the shape of the arc-shaped groove edge is consistent with the arc surface shape formed after removing the intersection line edge of the workpiece.

[0007] For the above-mentioned tool for removing the intersection line edge of the inner hole of a tee joint, an arc-shaped connecting surface matching the inner wall of the inner hole of the tee joint is provided at the joint part of the lower end of the countersinking cutter and the arc-shaped groove edge.

[0008] For the above-mentioned tool for removing the intersection line edge of the inner hole of a tee joint, it is also provided with a countersinking cutter return spring wire; correspondingly, a countersinking cutter return spring wire avoidance groove and a countersinking cutter return spring wire installation hole are provided on the side wall of the rotating sleeve.

[0009] For the above-mentioned tool for removing the intersection line edge of the inner hole of a tee joint, the bottom of the sleeve of the rotating sleeve is an arc surface for cooperating with the tool feed amount control mechanism.

[0010] For the above-mentioned tool for removing the intersection line edge of the inner hole of a tee joint, thick anti-slip patterns are provided on the outer wall of the disc operating handle of the rotating sleeve.

[0011] The present invention provides a tool for removing the intersection line edge of the inner hole of a tee joint, which can, under the guiding action of the tool cutting trajectory guiding mechanism, move the edge of the countersinking cutter along the intersection line trajectory of the workpiece to perform the removal treatment of the edge. During the above-mentioned removal of the intersection line edge, the arc-shaped connecting surface provided at the joint part of the lower end of the countersinking cutter and the arc-shaped groove edge avoids scratching the inner hole wall of the tee joint by the edge of the countersinking cutter; through the cooperation of the upper end surface of the fixing rod and the tool axial movement distance measuring mechanism, the monitoring of the completion of the removal operation can be assisted, and through the cooperation of the profiling pin installed in the profiling pin assembly hole of the fixing rod and the profiling part in the tool cutting trajectory guiding mechanism, the guiding effect on the movement trajectory of the edge of the countersinking cutter is realized, and the rod body part of the fixing rod provides a supporting force for the countersinking cutter. Description of the Drawings

[0012] Figure 1 It is a schematic diagram of the structure of a tee joint and the intersection line edge of its inner hole;

[0013] Figure 2It is a schematic structural diagram of a device for cutting the intersecting line edge of the inner hole of a three-way joint;

[0014] Figure 3 It is a schematic structural diagram of the present invention;

[0015] Figure 4 It is a schematic structural diagram of a rotating sleeve;

[0016] Figure 5 It is Figure 4 The schematic structural diagram of the A-A section in

[0017] Figure 6 It is Figure 4 The schematic structural diagram of the B-B section in

[0018] Figure 7 It is Figure 4 The schematic structural diagram of the C-C section in

[0019] Figure 8 It is a schematic sectional view of a fixing rod;

[0020] Figure 9 It is a schematic sectional view of a countersinking cutter;

[0021] Figure 10 It is Figure 9 The enlarged view of the structure at position I in

[0022] The explanations of each label in the figure:

[0023] 1 is a three-way joint, 1-1 is a horizontal hole, 1-2 is a vertical hole, 1-3 is an intersecting line edge;

[0024] 2 is a workpiece clamping and positioning mechanism;

[0025] 3 is a tool, 3-1 is a rotating sleeve, 3-1-1 is a disc operating handle, 3-1-2 is a hole through which the fixing rod passes, 3-1-3 is a hole through which the countersinking cutter passes, 3-1-4 is a hole for installing the reset spring wire of the countersinking cutter, 3-1-5 is a relief groove for the reset spring wire of the countersinking cutter, 3-1-6 is a hinged assembly hole, 3-2 is a fixing rod, 3-2-1 is a hole for installing a profiling pin, 3-2-2 is a limiting boss, 3-3 is a countersinking cutter, 3-3-1 is an arc-shaped groove edge, 3-3-2 is an arc-shaped connecting surface, 3-4 is a reset spring wire of the countersinking cutter, 3-5 is a pin shaft;

[0026] 4 is a tool cutting trajectory guiding mechanism, 4-1 is a profiling pin;

[0027] 5 is a tool axial movement distance measuring mechanism;

[0028] 6 is a tool feed amount control mechanism. Specific implementation method

[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0030] Referring to FIGS. 1, Figure 2 , Figure 3 , the present invention provides a tool for removing the intersecting line edges of the inner holes of a tee joint. The cooperation between the tool 3 and the workpiece clamping and positioning mechanism 2, the tool cutting path guiding mechanism 4, the tool axial movement distance measuring mechanism 5, and the tool feed amount control mechanism 6 in the intersecting line edge removal device is used to complete Figure 1 the operation of removing the intersecting line edges of the inner holes of the tee joint shown in

[0031] . The tool includes a rotating sleeve 3-1, a fixing rod 3-2, a countersinking cutter 3-3, and a countersinking cutter return spring wire. The specific structure and assembly relationship will be described in detail below. Figures 2 to 7 Referring to

[0032] , for the tool for removing the intersecting line edges of the inner holes of a tee joint according to the present invention, the rotating sleeve 3-1 is of a sleeve structure. A disc operating handle 3-1-1 is provided at the upper end of the sleeve. Coarse-grained anti-slip patterns are provided on the outer wall of the disc operating handle 3-1-1. The disc operating handle 3-1-1 also has a central hole. The inner hole of the sleeve communicates with the central hole of the disc operating handle 3-1-1. The inner hole of the sleeve is a special-shaped cross-section hole, including a semi-circular inserting rod through hole 3-1-2 and a rectangular countersinking cutter through hole 3-1-3 combined together. The bottom of the sleeve of the rotating sleeve 3-1 is an arc surface for cooperating with the tool feed amount control mechanism 6. Figures 2 to 8 , for the tool for removing the intersecting line edges of the inner holes of a tee joint according to the present invention, the rod body of the inserting rod 3-2 is a semi-circular rod. A limiting boss 3-2-2 is provided at its upper end. An profiling pin assembly hole 3-2-1 for cooperating with the tool cutting path guiding mechanism 4 is provided above the limiting boss 3-2-2. The inserting rod 3-2 is assembled in the semi-circular inserting rod through hole 3-1-2 of the rotating sleeve 3-1.

[0033] Referring to Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 9 , Figure 10 , for the tool for removing the intersecting line edges of the inner holes of a tee joint according to the present invention, the countersinking cutter 3-3 is a long bar-shaped member. Its upper end is hingedly assembled with a hinged assembly hole 3-1-6 provided on the inner side wall of the rotating sleeve 3-1 through a pin shaft 3-5. An arc-shaped groove edge 3-3-1 is provided at the lower end of the countersinking cutter 3-3. The arc-shaped groove edge 3-3-1 is the same as the shape of the arc surface formed after removing the intersecting line edge 1-3 of the workpiece.

[0034] Referring to Figures 1 to 10, when the tool for cutting the intersecting line edge of the inner hole of the tee joint is used to cut the intersecting line edge 1-3 of the inner hole of the tee joint 1 workpiece, first, the workpiece to be machined, i.e., the tee joint 1 workpiece, is clamped and fixed by the workpiece clamping and positioning mechanism of the special device for cutting the intersecting line edge of the inner hole of the tee joint; the tool 3 is inserted into the vertical hole 1-2 of the workpiece and is assembled with the tool cutting trajectory guiding mechanism 4 of the special device for cutting the intersecting line edge of the inner hole of the tee joint, so that the upper disc operating handle 3-1-1 of the rotating sleeve 3-1 is in the rectangular window position of the device for cutting the intersecting line edge of the inner hole of the tee joint; then, the tool is aligned, so that the profiling element in the tool cutting trajectory guiding mechanism 4 is vertically opposite to the intersecting line edge 1-3 of the inner hole of the tee joint 1 workpiece, ensuring that their spatial trends are completely consistent; after a feed operation is completed by the tool feed amount control mechanism 6, the operator rotates the rotating sleeve 3-1 to make it complete a 360-degree rotation. Under the action of the tool cutting trajectory guiding mechanism, the profiling pin 4-1 installed at the upper end of the inserting rod 3-2 makes the arc-shaped groove edge 11-1 of the countersinking tool 11 cut the intersecting line edge 1-3 of the inner hole of the tee joint 1 workpiece once; repeat the above feed and cutting operation process until the reading of the dial indicator in the tool axial movement distance measuring mechanism 5 is consistent with the set value, that is, the cutting operation of the intersecting line edge 1-3 of the inner hole of the tee joint 1 workpiece is completed.

Claims

1. A cutting tool for removing the edge of the intersecting line of the inner holes of a tee joint, characterized in that: It includes a rotating sleeve (3-1), a fixing rod (3-2) and a countersinking cutter (3-3); the rotating sleeve (3-1) is of a sleeve structure, and a disc operating handle (3-1-1) is provided at the upper end of the sleeve. The disc operating handle (3-1-1) is provided with a central hole, and the inner hole of the sleeve communicates with the central hole of the disc operating handle. The inner hole of the sleeve is a special-shaped cross-section hole, including a semi-circular fixing rod through hole (3-1-2) and a rectangular countersinking cutter through hole (3-1-3) combined together; the body of the fixing rod (3-2) is a semi-circular rod, and a limiting boss (3-2-2) is provided at its upper end. Above the limiting boss (3-2-2), a profiling pin assembly hole (3-2-1) matching with the tool cutting path guiding mechanism (4) is provided. The fixing rod (3-2) is assembled in the semi-circular fixing rod through hole (3-1-2) of the rotating sleeve (3-1); the countersinking cutter (3-3) is a long bar-shaped member, and its upper end is hinged and assembled with the inner side wall of the rotating sleeve (3-1) through a pin shaft (3-5). An arc-shaped groove edge (3-3-1) is provided at the lower end of the countersinking cutter (3-3), and the arc-shaped groove edge (3-3-1) is consistent with the arc surface shape formed after cutting the intersection line edge (1-3) of the workpiece.

2. The cutting tool for removing the intersecting edge of the inner hole of the tee joint according to claim 1, wherein: An arc-shaped connecting surface (3-3-2) matching with the inner wall of the inner hole of the three-way joint is provided at the joint of the lower end of the countersinking cutter (3-3) and the arc-shaped groove edge (3-3-1).

3. The cutting tool for removing the intersecting edge of the inner hole of the three-way joint according to claim 1 or 2, characterized in that: It is also provided with a countersinking cutter return spring wire (3-4); correspondingly, a countersinking cutter return spring wire avoidance groove (3-1-5) and a countersinking cutter return spring wire installation hole (3-1-4) are provided on the side wall of the rotating sleeve (3-1).

4. The cutting tool for removing the intersecting line edges of the inner hole of the tee joint according to claim 3, wherein: The bottom of the sleeve of the rotating sleeve (3-1) is an arc surface matching with the tool feed amount control mechanism (6).

5. The cutting tool for removing the intersecting edge of the inner hole of the tee joint according to claim 4, characterized in that: Coarse anti-slip patterns are provided on the outer wall of the disc operating handle (3-1-1) of the rotating sleeve (3-1).

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