Inner ring groove milling device

Abstract

The present invention discloses an inner ring groove milling device, comprising a milling device main body and a pneumatic tensioning device, wherein the pneumatic tensioning device is mounted on the periphery of the milling device main body; the milling device main body comprises a main drive unit, a rotor unit and a rotating tool holder unit, wherein the rotor unit is arranged inside the main drive unit, and the rotating tool holder unit is connected to the rotor unit; the pneumatic tensioning device comprises a cylinder, a thin-walled cylinder surface, two annular side sealing plates and an air pipe interface, wherein the cylinder, the thin-walled cylinder surface and the two annular side sealing plates form an annular air-filled cavity, and the air pipe interface is mounted on the annular side sealing plates and connected to the annular air-filled cavity. Advantages: the inner ring groove milling device can perform internal grooving on pipes with larger diameters that are inconvenient to transport and move, or can be used in situations where it is inconvenient to perform cutting operations from the outside of the pipe.

Description

Technical Field

[0001] The invention relates to a device for grooving or cutting a metal pipe from the inside, in particular to an inner ring groove milling device, belonging to the technical field of mechanical processing. Background Art

[0002] The processing of the annular groove inside the pipe can generally be carried out on equipment such as lathes or boring machines. This requires the pipe to be moved to the workshop and mounted on the machine tool equipment. If the pipe is too long to be convenient for transportation, or if it is operated in the field, it is still difficult to cut the inner groove. Therefore, it is of certain practical value to design a portable device that can cut the inner groove of the pipe. Summary of the invention

[0003] Aiming at the technical problem that it is difficult to cut the inner ring groove of a pipe that is too long as mentioned in the background technology, the present invention provides an inner ring groove milling device.

[0004] The technical solution adopted by the present invention is:

[0005] An inner ring groove milling device comprises a milling device main body and a pneumatic tensioning device, wherein the pneumatic tensioning device is sleeved on the periphery of the milling device main body;

[0006] The main machine of the milling device includes a main driving unit, a rotor unit and a rotating tool holder unit, wherein the rotor unit is arranged inside the main driving unit, and the rotating tool holder unit is connected to the rotor unit;

[0007] The main driving unit includes a casing, two handles, a main driving motor, a circumferential feed motor and a driving gear. The casing is an inverted barrel formed by a disc-shaped casing end plate and a cylindrical casing body. The two handles are arranged on the disc-shaped casing end plate at intervals and are located on the outer end surface of the disc-shaped casing end plate. The main driving motor and the circumferential feed motor are both vertically arranged on the disc-shaped casing end plate. The motor shafts of the main driving motor and the circumferential feed motor extend into the casing. The driving gear is installed on the motor shaft of the circumferential feed motor, and the driving gear meshes with the rotor unit.

[0008] The rotor unit includes a central shaft sleeve group and a rotor housing group, the rotor housing group and the central shaft sleeve group are coaxially installed, the driving gear is meshed with the rotor housing group, and the central shaft sleeve group is connected to the rotating tool holder unit;

[0009] The rotor housing assembly includes a cylindrical barrel, an end plate, a sleeve and a circumferential feed driven gear. The end plate is sleeved on the cylindrical barrel and located at the edge of the lower end of the cylindrical barrel. The circumferential feed driven gear is sleeved on the cylindrical barrel and located at the edge of the upper end of the cylindrical barrel. The circumferential feed driven gear is externally meshed with the driving gear. The inner hole of the cylindrical barrel is a two-step step hole from top to bottom. The sleeve is inserted from the upper end of the inner hole of the cylindrical barrel. An annular groove is formed between the lower end surface of the sleeve and the end surface of the first-step step hole. A third bearing seat rotatably connected to the rotating tool holder unit is arranged around the cylindrical barrel on the end plate, and a bearing hole is provided on the third bearing seat.

[0010] The central rotating shaft sleeve assembly comprises a central rotating shaft, a second gear and a sleeve. The sleeve is inserted into the cylindrical tube. The upper end of the sleeve is fixedly connected with the disc-shaped housing end plate. A convex ring is arranged on the outer surface of the sleeve. The convex ring is limited in the ring groove for axial limitation of the rotor housing assembly. The central rotating shaft is rotatably connected with the inner hole of the sleeve through two bearings. The upper end of the central rotating shaft is connected to the motor shaft of the main driving motor through a coupling. The second gear is arranged at the lower end of the central rotating shaft. A notch is provided on the sleeve corresponding to the second gear. The second gear is engaged with the rotating tool holder unit through the notch.

[0011] The rotating tool holder unit includes a tool holder plate, a third gear, a fourth gear, a vertical shaft, a bevel gear set, a horizontal shaft, a chuck, a milling cutter, a tool holder plate direction adjustment motor and a first gear.

[0012] The tool holder plate direction adjustment motor is installed on the end plate, the first gear is installed on the motor shaft of the tool holder plate direction adjustment motor, the third gear is horizontally fixed on the front of the tool holder plate, a center plate hole is opened on the tool holder plate, the third gear is concentric with the center plate hole of the tool holder plate, the upper part of the vertical shaft is rotatably arranged in the bearing hole of the third bearing seat through two bearings, the lower part of the vertical shaft passes through the third gear and the center plate hole of the tool holder plate, the lower part of the vertical shaft and the third gear and the center plate hole of the tool holder plate are rotatably connected through bearings, the third gear is externally meshed with the first gear, the fourth gear is installed on the upper end of the vertical shaft and is externally meshed with the second gear, the back side of the tool holder plate is rotatably arranged with a horizontal shaft through the first bearing seat and the second bearing seat, the lower end of the vertical shaft is connected to the horizontal shaft through a bevel gear set, a chuck is installed at one end of the horizontal shaft, and the milling cutter is inserted into the chuck;

[0013] The pneumatic tensioning device comprises a cylinder, a thin-walled cylinder surface, two annular side sealing plates and an air pipe interface. The cylinder, the thin-walled cylinder surface and the two annular side sealing plates form an annular inflation cavity. The air pipe interface is mounted on the annular side sealing plates and connected to the annular inflation cavity.

[0014] Preferably, the bevel gear set includes a first bevel gear and a second bevel gear.

[0015] The beneficial effects of the present invention are:

[0016] 1. This inner ring groove milling device is used to cut the inner groove of the pipe with a larger diameter which is not easy to carry and move, or it is used in the occasions where it is not convenient to cut the pipe from the outside.

[0017] 2. The inner ring groove milling device uses the angle adjustment of the offset rotating tool holder to control the depth of the groove. The tool itself does not need to move axially, and the control is convenient.

[0018] 3. This inner ring groove milling device uses a pneumatic tensioning device to fix the milling device main machine and the inner wall of the pipeline. It has a simple and compact structure, uniform pressure and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the general diagram of the inner ring groove milling device.

[0020] Figure 2 It is a schematic diagram of the main machine of the milling device.

[0021] Figure 3 yes Figure 2 A cutaway view of the chassis.

[0022] Figure 4 This is a schematic diagram of the main drive unit (the casing is cut away in the figure).

[0023] Figure 5 It is a schematic diagram of the installation position of the rotor unit and the rotating tool holder unit (the figure shows the state where the milling cutter is extended to the maximum position and the rotor unit is cut in the figure).

[0024] Figure 6 yes Figure 5 State diagram of the milling cutter being retracted.

[0025] Figure 7 It is an assembly cutaway view of the rotor housing assembly and the tool holder plate direction adjustment motor.

[0026] Figure 8 It is a schematic diagram of the center shaft sleeve assembly (the sleeve is cut away in the figure).

[0027] Fig. 9 is a schematic diagram of the rotating tool holder unit.

[0028] Fig.10 It is a structural cutaway diagram of a pneumatic tensioner. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is described in detail below, but the protection scope of the present invention is not limited to the embodiments.

[0030] To make the content of the present invention more clearly understood, the following Figure 1-Figure 10 The specific implementation manner is further described.

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] Example 1

[0033] like Figure 1 As shown, the inner ring groove milling device in this embodiment includes a milling device main body 1000 and a pneumatic tensioning device 2000, and the pneumatic tensioning device 2000 is sleeved on the periphery of the milling device main body 1000.

[0034] like Fig.10 As shown, the pneumatic tensioning device 2000 includes a cylinder 2001, a thin-walled cylindrical surface 2003, two annular side sealing plates 2002 and an air pipe interface 2004. The cylinder 2001, the thin-walled cylindrical surface 2003 and the two annular side sealing plates 2002 form an annular inflation chamber. The air pipe interface 2004 is installed on the annular side sealing plate 2002 and is connected to the annular inflation chamber.

[0035] The pneumatic tensioning device 2000 of Example 1 is connected to the housing 1110 of the milling device main unit 1000 through the cylinder 2001. Pressurized air is introduced into the annular air-filled cavity through the air pipe interface 2004, and the thin-walled cylindrical surface 2003 expands outward, the diameter increases, and supports the inner wall of the pipe 01 to be milled. After the milling is complete, the pressurized air is released and the milling device main unit 1000 can be taken out.

[0036] The pneumatic tensioning device is used to fix the main machine of the milling device to the inner wall of the pipeline, which has a simple and compact structure, uniform pressure and easy operation.

[0037] like Figure 2 and 3 As shown, the main machine 1000 of the milling device includes a main driving unit 1100 , a rotor unit 1200 and a rotating tool holder unit 1300 . The rotor unit 1200 is disposed inside the main driving unit 1100 , and the rotating tool holder unit 1300 is connected to the rotor unit 1200 .

[0038] like Figure 4 As shown, the main driving unit 1100 includes a housing 1110 , two handles 1120 , a main driving motor 1130 , a circular feeding motor 1140 and a driving gear 1141 .

[0039] The casing 1110 is an inverted barrel shape consisting of a disc-shaped casing end plate 1111 and a cylindrical casing body 1112. Two handles 1120 are arranged at intervals on the disc-shaped casing end plate 1111 and are located on the outer end surface of the disc-shaped casing end plate 1111. The main drive motor 1130 and the circular feed motor 1140 are both vertically arranged on the disc-shaped casing end plate 1111. The motor shafts of the main drive motor 1130 and the circular feed motor 1140 are both extended into the casing 1110. The driving gear 1141 is installed on the motor shaft of the circular feed motor 1140, and the driving gear 1141 engages with the rotor unit 1200.

[0040] In Example 1, the main drive motor 1130 rotates, drives the second gear 1213 through the coupling 1212 and the central shaft 1211, and then drives the vertical shaft 1322 and the second bevel gear 1324 through the second gear 1321, and then drives the horizontal shaft 1331 through the first bevel gear 1332 to drive the milling cutter 1334 to rotate at high speed to perform the main cutting motion.

[0041] In Example 1, the slow rotation of the circular feed motor 1140 drives the rotor to perform circular feed to cut out a complete annular groove or cut off.

[0042] like Figure 5 and 6 As shown, the rotor unit 1200 includes a central shaft sleeve assembly 1210 and a rotor housing assembly 1220 . The rotor housing assembly 1220 is coaxially installed with the central shaft sleeve assembly 1210 . The driving gear 1141 is meshed with the rotor housing assembly 1220 . The central shaft sleeve assembly 1210 is connected to the rotating tool holder unit 1300 .

[0043] like Figure 7 As shown, the rotor housing assembly 1220 includes a cylindrical barrel 1221, an end plate 1222, a sleeve 1223 and a circumferential feed driven gear 1225. The end plate 1222 is sleeved on the cylindrical barrel 1221 and is located at the lower edge of the cylindrical barrel 1221. The cylindrical barrel 1221 and the end plate 1222 are fixed as a whole. The circumferential feed driven gear 1225 is sleeved on the cylindrical barrel 1221 and is located at the upper edge of the cylindrical barrel 1221. The circumferential feed driven gear 1225 and the cylindrical barrel 1221 are fixed as a whole. The circumferential feed driven gear 1225 is meshed with the driving gear 1141; the inner hole of the cylindrical barrel 1221 is a two-step stepped hole 1226 from top to bottom, and the sleeve 1223 is inserted from the upper end of the inner hole of the cylindrical barrel 1221. An annular groove 1224 is formed between the lower end surface of the sleeve 1223 and the end surface of the first-step stepped hole. The upper end surface of the sleeve 1223 is fixed to the upper end surface of the cylindrical barrel 1221 by bolts. A third bearing seat rotatably connected to the rotating tool holder unit 1300 is arranged on the end plate 1222 around the cylindrical barrel 1221, and a bearing hole 1227 is provided on the third bearing seat.

[0044] like Figure 8As shown, the central shaft sleeve assembly 1210 includes a central shaft 1211, a second gear 1213 and a sleeve 1215. The sleeve 1215 is inserted into the cylindrical tube 1221. The outer wall of the sleeve 1215 is slidably matched with the inner wall of the cylindrical tube 1221 on the rotor housing 1220. An end plate is arranged on the upper end of the sleeve 1215 and is fixedly connected with the disc-shaped housing end plate 1111. A convex ring 1216 is arranged on the outer surface of the sleeve 1215. The convex ring 1216 is limited in the ring groove 1224 for Axial limit of the rotor housing group 1220; the central rotating shaft 1211 is rotatably connected to the inner hole of the sleeve 1215 through two bearings 1214, the upper end of the central rotating shaft 1211 is connected to the motor shaft of the main drive motor 1130 through a coupling 1212, and the second gear 1213 is arranged at the lower end of the central rotating shaft 1211, and a notch is opened on the sleeve 1215 corresponding to the second gear 1213, and the second gear 1213 engages with the rotating tool holder unit 1300 through the notch.

[0045] like Figure 6 and 9 As shown, the rotating tool holder unit 1300 includes a tool holder plate 1310 , a third gear 1314 , a fourth gear 1321 , a vertical shaft 1322 , a bevel gear set, a horizontal shaft 1331 , a chuck 1333 , a milling cutter 1334 , a tool holder plate direction adjustment motor 1230 and a first gear 1231 .

[0046] like Figure 7 As shown, the tool holder plate direction adjustment motor 1230 is installed on the end plate 1222, the motor shaft of the tool holder plate direction adjustment motor 1230 passes through the end plate 1222, the first gear 1231 is installed on the motor shaft of the tool holder plate direction adjustment motor 1230, the first gear 1231 is meshed with the third gear 1314, and the tool holder plate direction adjustment motor 1230 adjusts and controls the relative position (rotation position) of the milling cutter 1334 in the rotating tool holder unit 1300 and the rotor housing group 1220 to control the extension length of the milling cutter 1334 relative to the rotation center of the rotor housing group 1220 (the limit position of the tool extension is shown in FIG. Figure 5 and Figure 6 ). (Because the rotation center 1227 of the tool holder is not concentric with the rotation center 1226 of the rotor housing 1220).

[0047] like Figure 6 and 9As shown, the third gear 1314 is horizontally fixed on the front of the tool holder plate 1310, the tool holder plate 1310 is provided with a center plate hole, the third gear 1314 is concentric with the center plate hole of the tool holder plate 1310, the upper part of the vertical shaft 1322 is rotatably arranged in the bearing hole 1227 of the third bearing seat through two bearings 1214, the lower part of the vertical shaft 1322 passes through the third gear 1314 and the center plate hole of the tool holder plate 1310, and the lower part of the vertical shaft 1322 is aligned with the third gear 1314 and the center plate hole of the tool holder plate 1310. The third gear 1314 is externally meshed with the first gear 1231, the fourth gear 1321 is mounted on the upper end of the vertical shaft 1322 and is externally meshed with the second gear 1213, the back of the tool holder plate 1310 is rotatably provided with the horizontal shaft 1331 through the first bearing seat 1312 and the second bearing seat 1313, the lower end of the vertical shaft 1322 is connected to the horizontal shaft 1331 through a bevel gear set, the chuck 1333 is mounted on one end of the horizontal shaft 1331, and the milling cutter 1334 is inserted into the chuck 1333. The bevel gear set includes a first bevel gear 1332 and a second bevel gear 1324, the first bevel gear 1332 is fixed on the horizontal shaft 1331, the second bevel gear 1324 is fixed on the lower end of the vertical shaft 1322, and the first bevel gear 1332 and the second bevel gear 1324 are meshed.

[0048] Working process of the inner ring groove milling device in Example 1:

[0049] Place the milling device main unit 1000 in the round tube 01 to be milled, adjust and level it and control its position, and connect the pneumatic tensioning device 2000 to the housing 1110 of the milling device main unit 1000 through the cylinder 2001. Introduce pressurized air into the annular air-filled cavity through the air pipe interface 2004, and the thin-walled cylindrical surface 2003 expands outwards, increasing its diameter, and supports the inner wall of the round tube 01 to be milled (the pressing force is uniform, and the tube wall is not easily deformed or broken.)

[0050] The main drive motor 1130 rotates, drives the second gear 1213 through the coupling 1212 and the central shaft 1211, and then drives the vertical shaft 1322 and the second bevel gear 1324 through the second gear 1321, and then drives the horizontal shaft 1331 through the first bevel gear 1332 to drive the milling cutter 1334 to rotate at high speed to perform the main cutting motion.

[0051] The relative position (rotational position) of the milling cutter 1334 and the rotor housing group 1220 in the rotating tool holder unit 1300 is adjusted and controlled by the tool holder plate direction adjustment motor 1230 (slow rotation) to control the extension length of the milling cutter 1334 relative to the rotation center of the rotor housing group 1220, control the milling depth of the annular groove, or cut the round tube 01.

[0052] If the annular groove is milled, after the groove cutting is completed, the tool holder needs to adjust the motor 1230 to rotate in the opposite direction so that the tool can be retracted (out of the annular groove) so as to remove the milling device.

[0053] After the milling is complete, the pressurized air is released and the milling device main unit 1000 is taken out.

[0054] Anything not specifically described in the specification of the present invention is prior art or can be implemented by existing technology. It should be understood that for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should fall within the scope of protection of the claims attached to the present invention.

Claims

1. An inner ring groove milling device, characterized in that: It comprises a milling device main body (1000) and a pneumatic tensioning device (2000), wherein the pneumatic tensioning device (2000) is sleeved on the periphery of the milling device main body (1000); The main machine (1000) of the milling device comprises a main driving unit (1100), a rotor unit (1200) and a rotating tool holder unit (1300), wherein the rotor unit (1200) is disposed inside the main driving unit (1100), and the rotating tool holder unit (1300) is connected to the rotor unit (1200); The main drive unit (1100) comprises a housing (1110), two handles (1120), a main drive motor (1130), a circumferential feed motor (1140) and a driving gear (1141); the housing (1110) is in an inverted barrel shape consisting of a disc-shaped housing end plate (1111) and a cylindrical housing body (1112); the two handles (1120) are arranged at intervals on the disc-shaped housing end plate (1111) and are located on the disc-shaped housing end plate (1112). 1111), the main drive motor (1130) and the circumferential feed motor (1140) are both vertically arranged on the disc-shaped housing end plate (1111), the motor shafts of the main drive motor (1130) and the circumferential feed motor (1140) are both extended into the housing (1110), the driving gear (1141) is installed on the motor shaft of the circumferential feed motor (1140), and the driving gear (1141) is engaged with the rotor unit (1200); The rotor unit (1200) comprises a central rotating shaft sleeve group (1210) and a rotor housing group (1220), the rotor housing group (1220) and the central rotating shaft sleeve group (1210) are coaxially mounted, the driving gear (1141) is meshed with the rotor housing group (1220), and the central rotating shaft sleeve group (1210) is connected to the rotating tool holder unit (1300); The rotor housing assembly (1220) comprises a cylindrical barrel (1221), an end plate (1222), a sleeve (1223) and a circumferential feed driven gear (1225); the end plate (1222) is sleeved on the cylindrical barrel (1221) and is located at the lower edge of the cylindrical barrel (1221); the circumferential feed driven gear (1225) is sleeved on the cylindrical barrel (1221) and is located at the upper edge of the cylindrical barrel (1221); the circumferential feed driven gear (1225) is connected to the driving gear The inner hole of the cylindrical tube (1221) is a two-step stepped hole from top to bottom, the sleeve (1223) is inserted from the upper end of the inner hole of the cylindrical tube (1221), and an annular groove (1224) is formed between the lower end surface of the sleeve (1223) and the end surface of the first-step stepped hole. A third bearing seat rotatably connected to the rotating tool holder unit (1300) is arranged on the end plate (1222) around the cylindrical tube (1221), and a bearing hole (1227) is provided on the third bearing seat; The central rotating shaft sleeve assembly (1210) comprises a central rotating shaft (1211), a second gear (1213) and a sleeve (1215), wherein the sleeve (1215) is inserted into a cylindrical tube (1221), the upper end of the sleeve (1215) is fixedly connected to a disc-shaped housing end plate (1111), and a convex ring (1216) is arranged on the outer surface of the sleeve (1215), and the convex ring (1216) is limited in an annular groove (1224) for axial limitation of the rotor housing assembly (1220); The shaft (1211) is rotatably connected to the inner hole of the shaft sleeve (1215) through two bearings (1214); the upper end of the central shaft (1211) is connected to the motor shaft of the main driving motor (1130) through a coupling (1212); the second gear (1213) is arranged at the lower end of the central shaft (1211); a notch is provided on the shaft sleeve (1215) corresponding to the second gear (1213); the second gear (1213) engages with the rotating tool holder unit (1300) through the notch; The rotating tool holder unit (1300) comprises a tool holder plate (1310), a third gear (1314), a fourth gear (1321), a vertical shaft (1322), a bevel gear set, a horizontal shaft (1331), a chuck (1333), a milling cutter (1334), a tool holder plate direction adjustment motor (1230) and a first gear (1231). The tool holder plate direction adjustment motor (1230) is installed on the end plate (1222), the first gear (1231) is installed on the motor shaft of the tool holder plate direction adjustment motor (1230), the third gear (1314) is horizontally fixed on the front side of the tool holder plate (1310), the tool holder plate (1310) is provided with a center plate hole, the third gear (1314) is concentric with the center plate hole of the tool holder plate (1310), the upper part of the vertical shaft (1322) is rotatably arranged in the bearing hole (1227) of the third bearing seat through two bearings (1214), the lower part of the vertical shaft (1322) passes through the third gear (1314) and the center plate hole of the tool holder plate (1310), and the vertical shaft (1322) The lower part is rotatably connected with the third gear (1314) and the center plate hole of the tool holder plate (1310) through a bearing, the third gear (1314) is externally meshed with the first gear (1231), the fourth gear (1321) is mounted on the upper end of the vertical shaft (1322) and is externally meshed with the second gear (1213), the back side of the tool holder plate (1310) is rotatably provided with a horizontal shaft (1331) through a first bearing seat (1312) and a second bearing seat (1313), the lower end of the vertical shaft (1322) and the horizontal shaft (1331) are connected through a bevel gear set, a chuck (1333) is mounted on one end of the horizontal shaft (1331), and the milling cutter (1334) is inserted into the chuck (1333); The pneumatic tensioning device (2000) comprises a cylinder (2001), a thin-walled cylindrical surface (2003), two annular side sealing plates (2002) and an air pipe interface (2004); the cylinder (2001), the thin-walled cylindrical surface (2003) and the two annular side sealing plates (2002) form an annular air-filled cavity; the air pipe interface (2004) is mounted on the annular side sealing plates (2002) and is connected to the annular air-filled cavity.

2. The inner ring groove milling device according to claim 1, characterized in that: The bevel gear set includes a first bevel gear (1332) and a second bevel gear (1324).

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