A kind of inserting knife for the inner cavity of rotating body structure and its using method

Abstract

The present invention discloses a slotting knife for the inner cavity of a rotating body structure and a method for using the slotting knife. The slotting knife includes a fixed knife handle, a fixed chuck, a knife rod and a knife head. One end of the fixed knife handle is connected to one end of the knife rod, the fixed chuck is connected to the fixed knife handle, the other end of the knife rod is connected to the knife head, and a blade is arranged on the knife head. The slotting knife of the present invention can be made into a knife rod of different outer dimensions according to the shape characteristics of the inner cavity of the cabin shell according to processing needs. The knife rod is nonlinearly set to avoid interference from the end flange, and is widened at the bend, so that the slotting knife has the advantages of good rigidity, etc. The fixed knife handle is connected to the spindle of the milling machine, and after directional adjustment, the 360° slotting milling processing of the cabin shell component can be realized, and the inner cavity special-shaped hole can be processed once, and the tool does not need to be replaced during the processing process, and the processing efficiency is high.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a plunger for an inner cavity of a rotating body structure and a use method thereof. Background Art

[0002] For the processing of cabin shell components, such as bomb bay shells, torpedo compartments and other complex rotating body products, there are process characteristics such as large processing removal and interference of processing elements. The existing processing schemes mainly include the following two: Scheme 1: Use customized extended inserts for layered milling on the vertical machining center, and use benchwork to manually grind the parts that cannot be reached by the tool due to structural limitations. Scheme 1 has the disadvantages of weak rigidity of the extended insert and low efficiency of layered milling; manual grinding by benchwork is used in the parts that cannot be reached by the tool, and the dimensional stability and surface quality are poor. Scheme 2: Configure a special angle head on the five-axis machining center to realize special-shaped hole processing. Scheme 2 has the disadvantages of long cycle and high cost of customized special angle heads; after the five-axis machining center is equipped with an angle head, it takes a long time to re-align the relevant datum; the cabin shell with complex structure has large external dimensions, and large-scale five-axis equipment is required to realize processing, and the production cost is high.

[0003] The patent document with the announcement number CN208450634U discloses a special boring and milling device suitable for the pod shell, which is connected to the main shaft of the machine tool and includes a cutter head, a cutter bar and a boring cutter core sleeve. The cutter head is equipped with a cutter and is connected to one end of the cutter bar. The cutter bar is connected to the boring cutter core sleeve. The end of the boring cutter core sleeve away from the cutter bar is a flange end face, and the flange end face is provided with a plurality of connection holes. The flange end face is tightly attached to the main shaft end face and is connected by bolts. Then, the flange end face of the boring tool core sleeve is provided with a positioning keyway to match with the positioning protrusion on the machine tool spindle, so as to transmit the torque of the machine tool spindle. The end of the boring tool core sleeve away from the tool rod is provided with a core shaft, which is a cone-shaped protrusion extending from the end face away from the tool rod to form a gradually reduced diameter. The machine tool spindle has an inner cone structure that matches the cone-shaped protrusion. The end of the core shaft is provided with a Latin hole, and the core shaft is tightened and fixed to the spindle by a rivet. However, the tool rod of the device is linearly set, which is not suitable for avoiding the interference of the protrusion on the cabin shell; at the same time, the tool is a boring tool, and the use method is different from that of the present application. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a knife for inserting into the inner cavity of a rotating body structure and a method for using the knife.

[0005] The present invention is achieved through the following technical solutions.

[0006] The present invention provides a knife insert for the inner cavity of a rotating body structure, comprising a fixed knife handle, a fixed chuck, a knife rod and a knife head, wherein one end of the fixed knife handle is connected to one end of the knife rod, the fixed chuck is connected to the fixed knife handle, the other end of the knife rod is connected to the knife head, and a blade is arranged on the knife head.

[0007] Preferably, a connecting hole and a limiting ring are provided on the fixed tool handle, and the limiting ring is connected to the fixed chuck.

[0008] Preferably, a limiting groove and a positioning groove are provided on the limiting ring.

[0009] Preferably, a screw hole A and a positioning pin are provided on the fixed chuck, and the fixed chuck is connected to the fixed tool handle and the tool rod through the screw hole A.

[0010] Preferably, slots are provided at both ends of the fixing chuck, and screw holes B are provided at the slots.

[0011] Preferably, the knife rod is arranged nonlinearly, and a connecting portion is arranged on the knife rod.

[0012] Preferably, a knife seat is arranged at one end of the knife head, and the blade is arranged in the knife seat.

[0013] Preferably, a locking screw is provided on the fixed chuck.

[0014] A method for inserting a knife into the inner cavity of a rotating body structure comprises the following steps:

[0015] S1: Connect the fixed chuck and the fixed tool holder with threads according to the assembly drawing and tighten them. Then fix the tool bar and the fixed chuck with a positioning pin and tighten them with locking screws. Then tighten the tool holder on the tool bar with screws. Finally, install the blade on the tool holder and tighten it.

[0016] S2: Install the fixed tool holder into the spindle hole of the milling machine, and install the screws into the connecting holes to connect and tighten the fixed tool holder to the spindle of the milling machine;

[0017] S3: Turn on the spindle orientation function of the milling machine and lock the spindle;

[0018] S4: Adjust the locking screw, and tighten the locking screw after aligning the X and Y surfaces of the tool holder;

[0019] S5: input the X, Y, and Z origins of the alignment tool into the milling machine processing coordinates;

[0020] S6: Program and start processing.

[0021] The beneficial effects of the present invention are:

[0022] The plunger of the present invention can be made into a tool bar of different outer dimensions according to the shape characteristics of the inner cavity of the cabin shell according to processing needs. The tool bar is nonlinearly set to avoid interference with the end flange, and is widened at the bending part, so that the plunger has the advantages of good rigidity and the like. The tool handle is fixedly connected to the main shaft of the milling machine, and after directional adjustment, 360° plunge milling processing of the cabin shell component can be realized, and the inner cavity special-shaped hole can be processed once without subsequent manual grinding, and there is no need to change the tool during the processing, so the processing efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the present invention;

[0025] Figure 3 It is a schematic diagram of the use of the present invention;

[0026] In the figure: 1-fixed tool handle, 11-connecting hole, 12-limiting ring, 121-limiting groove, 122-positioning groove, 2-fixed chuck, 21-screw hole A, 22-positioning tip, 23-slot, 24-screw hole B, 25-locking screw, 3-tool rod, 31-connecting part, 4-tool head, 41-blade, 42-tool seat, 43-screw. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0028] Example:

[0029] like Figure 1 As shown, a knife insert for the inner cavity of a rotating body structure comprises a fixed knife handle 1, a fixed chuck 2, a knife rod 3 and a knife head 4, wherein one end of the fixed knife handle 1 is connected to one end of the knife rod 3, the fixed chuck 2 is connected to the fixed knife handle 1, the other end of the knife rod 3 is connected to the knife head 4, and a blade 41 is arranged on the knife head 4.

[0030] The fixed tool handle 1 is provided with a connection hole 11 and a limiting ring 12, the limiting ring 12 is connected to the fixed chuck 2, the fixed tool handle 1 is connected to the spindle of the milling machine through the connection hole 11, and the connection position of the fixed chuck 2 is limited by the limiting ring. The fixed tool handle 1 can also select other suitable structures according to different milling machines connected.

[0031] The limiting ring 12 is provided with a limiting groove 121 and a positioning groove 122, and the limiting groove 121 is coaxially arranged with the limiting ring 12. The limiting groove 121 and the positioning groove 122 are used to locate the installation position on the milling machine.

[0032] The fixed chuck 2 is provided with a screw hole A21 and a positioning pin 22. The fixed chuck 2 is connected to the fixed tool handle 1 and the tool rod 3 through the screw hole A21, so as to facilitate the disassembly and assembly of the fixed tool handle 1 and the tool rod 3.

[0033] Slots 23 are provided at both ends of the fixed chuck 2, and screw holes B24 are provided at the slots 23. The screw holes B24 are symmetrically arranged on both sides of the slots 23. By using bolts to penetrate the screw holes B24, the fixed chuck 2 can further clamp and fix the tool handle 1 and the tool rod 3.

[0034] The tool rod 3 is set nonlinearly, specifically in a Z shape. The turning point has a reinforced rigid design to increase its width. It has strong rigidity and can withstand a large cutting force. It can avoid the interference of the upper flange of the cabin shell through the turning point. A connecting portion 31 is set on the tool rod 3, and a screw hole is set on the connecting portion 31. A locking screw 25 is set on the fixed chuck 2. The locking screw 25 can be used to pass through the screw hole and be threadedly connected with the corresponding screw hole on the fixed chuck 2, thereby tightening the connection between the tool rod 3 and the fixed chuck 2.

[0035] A blade seat 42 is disposed at one end of the blade head 4 , and the blade 41 is disposed in the blade seat 42 . The blade 41 can be fixed to the blade head 4 by means of screws 43 .

[0036] A method for using a knife for inserting a cavity of a rotating structure according to any one of claims 1 to 8, characterized in that it comprises the following steps:

[0037] S1: According to the assembly diagram, the fixed chuck 2 is threadedly connected with the fixed tool handle 1 and fastened and assembled, and then the tool rod 3 is fixed to the fixed chuck 2 with the positioning pin 22 and fastened and assembled with the locking screw 25, and then the tool holder 42 is fastened and assembled on the tool rod 3 with the screw 43, and finally the blade 41 is installed on the tool holder 42 and fastened;

[0038] S2: Install the fixed tool holder 1 into the spindle hole of the milling machine, and install the screw into the connecting hole 11 to connect and tighten the fixed tool holder 1 to the spindle of the milling machine;

[0039] S3: Turn on the spindle orientation function of the milling machine and lock the spindle;

[0040] S4: Adjust the locking screw 25, and tighten the locking screw 25 after aligning the X and Y surfaces of the tool holder 42, and place the blade 41 next to the part to be processed;

[0041] S5: input the X, Y, and Z origins of the alignment tool into the milling machine processing coordinates;

[0042] S6: Program and start processing.

[0043] The alignment steps include: after the spindle is oriented, the outer surface of the tool holder 42 is marked, and the X and Y values ​​are corrected before locking the chuck 2 to ensure that the tool holder 42 is in the same direction as the milling machine spindle after orientation. After the blade 41 is installed on the tool holder 42, the XY directions continue to use the coordinates of the tool holder 42 that have been aligned before, and the Z direction needs to be re-aligned to determine the origin. The usual practice is to use a test block to manually adjust the tool and then determine the X, Y, and Z coordinate origins of the processing.

[0044] Programming includes: first establish a three-dimensional digital model, then use UG or MASTERCOM software to generate G code and M code, the code is transmitted to the system of CNC equipment machine tools (such as milling machines) (the system is suitable for Faraday, Mitsubishi, Siemens, etc.), and the machine tool system recognizes the code and starts processing in the order of process requirements.

Claims

1. A knife for inserting into the inner cavity of a rotating structure, characterized in that: The invention comprises a fixed knife handle (1), a fixed chuck (2), a knife rod (3) and a knife head (4); one end of the fixed knife handle (1) is connected to one end of the knife rod (3); the fixed chuck (2) is connected to the fixed knife handle (1); the other end of the knife rod (3) is connected to the knife head (4); and a blade (41) is arranged on the knife head (4).

2. A plunger for the inner cavity of a rotating structure according to claim 1, characterized in that: The fixed tool handle (1) is provided with a connecting hole (11) and a limiting ring (12), and the limiting ring (12) is connected to the fixed chuck (2).

3. A plunger for the inner cavity of a rotating structure according to claim 2, characterized in that: The limiting ring (12) is provided with a limiting groove (121) and a positioning groove (122).

4. A plunger for the inner cavity of a rotating structure according to claim 1, characterized in that: The fixed chuck (2) is provided with a screw hole A (21) and a positioning pin (22), and the fixed chuck (2) is connected to the fixed tool handle (1) and the tool rod (3) via the screw hole A (21).

5. The inserting knife for the inner cavity of a rotating structure according to claim 1, characterized in that: Slots (23) are provided at both ends of the fixed chuck (2), and screw holes B (24) are provided at the slots (23).

6. A plunger for the inner cavity of a rotating structure according to claim 1, characterized in that: The knife rod (3) is arranged in a non-linear manner, and a connecting portion (31) is arranged on the knife rod (3).

7. A plunger for the inner cavity of a rotating structure according to claim 1, characterized in that: A knife seat (42) is arranged at one end of the knife head (4), and the blade (41) is arranged in the knife seat (42).

8. The inserting knife for the inner cavity of a rotating structure according to claim 1, characterized in that: A locking screw (25) is arranged on the fixed chuck (2).

9. A method for using a knife for inserting a cavity of a rotating structure according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: According to the assembly diagram, the fixed chuck (2) and the fixed tool handle (1) are threadedly connected and fastened, and then the tool rod (3) and the fixed chuck (2) are fixed with the positioning pin (22) and fastened with the locking screw (25), and then the tool holder (42) is fastened and assembled on the tool rod (3) with the screw (43), and finally the blade (41) is installed on the tool holder (42) and fastened; S2: Install the fixed tool holder (1) into the spindle hole of the milling machine, and install the screw into the connecting hole (11) to connect and tighten the fixed tool holder (1) to the spindle of the milling machine; S3: Turn on the spindle orientation function of the milling machine and lock the spindle; S4: Adjust the locking screw (25), and tighten the locking screw (25) after aligning the X and Y surfaces of the tool holder (42); S5: input the X, Y, and Z origins of the alignment tool into the milling machine processing coordinates; S6: Program and start processing.

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