Efficient milling cutter structure for RTP pipe welding

Abstract

The utility model discloses an efficient milling cutter structure for RTP pipe welding, which belongs to the technical field of RTP pipe welding treatment, and comprises a rack, a shaft is arranged on the rack, an oil cylinder is arranged at one end of the shaft, a lower side clamp is arranged on the shaft, a plurality of inner clamps are arranged on the oil cylinder in a linear manner, and the lower side clamp is arranged on the inner clamps. The lower side clamp and the inner clamp are both provided with fixing bolts, one end of the rack is provided with a propelling mechanism capable of adjusting the feeding speed, the propelling mechanism is provided with a milling cutter mechanism, a connecting mechanism is arranged between the propelling mechanism and the milling cutter mechanism, firstly, the shaft is arranged on the rack, the lower side clamp and the inner clamp are arranged on the shaft, and the milling cutter mechanism is arranged on the shaft. The RTP pipe can be fixed, then the oil cylinder can push the RTP pipe to move, the pushing mechanism and the milling cutter mechanism can be connected through the connecting mechanism, the feeding speed of the milling cutter mechanism can be controlled through the pushing mechanism, and the milling precision can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of RTP pipe welding processing, in particular to an RTP pipe welding high-efficiency milling cutter structure. Background Art

[0002] With the continuous development of modern industrial technology, RTP, as a new type of polymer material pipeline, has been widely used in the fields of petroleum, chemical industry, electric power, municipal engineering, etc. due to its excellent physical properties, chemical stability and processing convenience. In the RTP pipe welding process, the milling cutter is used as a pretreatment tool before welding. Its main function is to flatten, deburr and remove the oxide layer of the end face of the RTP pipe to be welded to ensure the quality and sealing of the welded joint.

[0003] An existing high-efficiency milling cutter grinding machine, the existing milling cutter grinding machine needs to stop to change the milling cutter position, which reduces the processing efficiency and increases the work intensity of the processing personnel. Changing the milling cutter back and forth will also affect the grinding quality of the milling cutter. In addition, the existing milling cutter grinding machine has a complex structure, inconvenient operation, high production cost and low production efficiency;

[0004] Existing patent (Announcement No.: CN209902804U) A high-efficiency milling cutter sharpening machine includes a base and a motor, the motor is connected to a power grinding wheel, the upper surface of the base is connected to a lower base plate, a workbench, a connecting plate and a connecting seat in sequence, a milling cutter fixing device is provided on the side of the connecting seat, the milling cutter fixing device includes a spindle, a rotating sleeve, a locking nut and a gear, the gear sleeve is on the outer ring of the spindle and is fixedly connected to the spindle, the rotating sleeve is on the outer ring of the spindle and is connected to the workbench through a fixed plate, the connecting seat is provided with a rotating hole and a rotating rack hole, a rack is correspondingly provided in the rotating rack hole, the base is fixedly connected to two parallel support plates, the support plate is connected to the linear rail seat by adjusting the base, the upper surface of the linear rail seat is fixedly connected to the linear rail, the linear rail is connected to the transmission sleeve through a slider, the upper surface of the transmission sleeve is fixedly connected to the transmission shaft, and the transmission shaft is fixedly connected to one end of the rack; the utility model improves processing efficiency, reduces the work intensity of processing personnel, improves the grinding quality of the milling cutter, greatly reduces production costs, and improves production efficiency.

[0005] In view of the above problems, the existing patents provide solutions, but the feeding in the length direction is achieved through gears, racks and linear rails. However, the feeding speed cannot be well controlled by gears, racks and linear rails alone. If the feeding speed is too fast, the milling accuracy is easily reduced.

[0006] Therefore, an efficient milling cutter structure for RTP pipe welding is proposed. Utility Model Content

[0007] The purpose of the utility model is to provide an RTP pipe welding high-efficiency milling cutter structure, which can solve the problem that the existing RTP pipe welding high-efficiency milling cutter structure cannot well control the feed speed only through gears, racks and linear rails, and if the feed speed is too fast, the milling accuracy is easily reduced.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an RTP pipe welding high-efficiency milling cutter structure, comprising a frame, a shaft is arranged on the frame, a cylinder is arranged at one end of the shaft, a lower clamp is arranged on the shaft, an inner clamp is arranged on the cylinder, the number of the inner clamps is several and they are arranged linearly, the lower clamp and the inner clamp are both provided with fixing bolts, a propulsion mechanism capable of adjusting the feed speed is arranged at one end of the frame, a milling cutter mechanism is arranged on the propulsion mechanism, and a connecting mechanism is arranged between the propulsion mechanism and the milling cutter mechanism.

[0009] Preferably, the propulsion mechanism includes a propulsion frame, a propulsion fixing block, a propulsion rod, a connecting rod and a handwheel, the propulsion frame is arranged on the frame, the propulsion fixing block is arranged on the propulsion frame, the propulsion rod is arranged on the propulsion fixing block and passes through the propulsion fixing block, the connecting rod is arranged on the propulsion fixing block and connected to the propulsion rod, and the handwheel is arranged on the connecting rod.

[0010] Preferably, the milling cutter mechanism comprises a milling cutter frame, a fixing hoop, a latch, a rotating cutter disc, a tool rod fixing seat, a tool rod fixing sliding seat, a buckle groove cutter mounting hole, a buckle groove cutter, a blade fixing seat, a blade, a center bushing, an adjusting rod and a pistol drill, the milling cutter frame is arranged on one side of the pushing frame, the fixing hoop is arranged on the side wall of the milling cutter frame, the fixing hoop is arranged in cooperation with the shaft, the latch is arranged on the fixing hoop, the rotating cutter disc is arranged on the milling cutter frame, the tool rod fixing seat is arranged on the rotating cutter disc, the tool rod fixing sliding seat is arranged on the tool rod fixing seat, the buckle groove cutter mounting hole is arranged on the tool rod fixing sliding seat, the buckle groove cutter is arranged on the buckle groove cutter mounting hole, the blade fixing seat is arranged on one side of the tool rod fixing seat, the blade is arranged on the blade fixing seat, the center bushing is arranged between the tool rod fixing seat and the blade fixing seat, the adjusting rod is arranged on the tool rod fixing seat and is connected to the tool rod fixing sliding seat, the pistol drill is arranged on the milling cutter frame and the output end is connected to the rotating cutter disc.

[0011] Preferably, the connecting mechanism includes a cross fixing block, a fixing disk, an open fixing block, a rotating block, a cross slot and a push rod, the cross fixing block is arranged on the side of the propulsion frame away from the propulsion fixing block, the fixing disk is arranged on the side of the milling cutter frame away from the rotating cutter disk, the open fixing block is arranged on the fixing disk, the rotating block is arranged on the inner wall of the open fixing block, the cross slot is arranged on the rotating block, and the push rod is arranged on the rotating block.

[0012] Preferably, the lower clamp and the inner clamp include a first clamping sleeve and a second clamping sleeve, the first clamping sleeve and the second clamping sleeve are connected to each other, one end of the first clamping sleeve and the second clamping sleeve is provided with a rotating fixing pin, and the other end of the first clamping sleeve and the second clamping sleeve is provided with a pin rebound block.

[0013] Preferably, a friction layer for increasing friction force is provided on the hand wheel.

[0014] Preferably, the fixing hoop is semicircular in shape, and the diameter of the fixing hoop is consistent with that of the shaft.

[0015] Preferably, a handle is provided on the side wall of the milling cutter holder for easy picking up.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The present application is provided with a propulsion mechanism, and the propulsion frame is fixed on the frame as the overall basic supporting structure. The propulsion fixing block is installed on the propulsion frame to fix and support the propulsion rod and ensure that it can stably perform linear motion. By rotating the handwheel, the rotational motion of the handwheel is converted into linear motion through the connecting rod and transmitted to the propulsion rod. Driven by the connecting rod, the propulsion rod performs linear motion along its axial direction, thereby achieving the propulsion of the target component. The propulsion frame and the propulsion fixing block maintain structural stability, ensuring that the motion trajectory of the propulsion rod is stable and accurate. Propulsion is achieved by rotating the handwheel, which can control the feed speed of the milling cutter mechanism and can feed the milling cutter mechanism slowly to achieve precise milling and grinding operations.

[0018] 2. The present application is provided with a milling cutter mechanism, the milling cutter holder is arranged on one side of the push frame, the fixing hoop cooperates with the latch pin, and the milling cutter holder can be fixed on the shaft to prevent loosening, the rotating cutter disc is installed on the milling cutter holder, the tool bar fixing seat is located on the rotating cutter disc, and is used to fix the tool bar to ensure that the tool bar remains stable when the rotating cutter disc rotates, and then the tool bar fixing sliding seat is installed on the tool bar fixing seat, and can slide in a certain direction to adjust the position of the buckle groove cutter, and then the groove cutter mounting hole is set on the tool bar fixing sliding seat, and the buckle groove cutter is installed on the buckle groove cutter mounting hole, which is responsible for the main milling work, and the blade fixing seat is located on the tool bar On one side of the fixing seat, the blade is installed on the blade fixing seat, which can remove the glass fiber on the RTP tube. Then the pistol drill is set on the milling cutter holder, and its output end is connected to the rotating cutter disc to provide rotational power for the rotating cutter disc. When in use, the operator starts the pistol drill, and the pistol drill drives the rotating cutter disc to rotate. The rotating cutter disc drives the grooving cutter and the blade thereon to rotate together to perform milling operations. According to processing requirements, the operator can adjust the position of the grooving cutter through the adjusting rod to change the milling depth and range, which can remove the glass fiber on the RTP tube and then mill the pin end face, which can better perform subsequent hot melt welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is the overall structural view of the utility model;

[0021] Figure 2 This is an overall structural view of the propulsion mechanism of the utility model;

[0022] Figure 3 This is the overall structural view of the milling cutter mechanism of the utility model;

[0023] Figure 4 This is an overall structural view of the cross fixing block, the propulsion block and the propulsion rod of the utility model;

[0024] Figure 5 This is an overall structural view of the fixed disk, the open fixed block and the rotating block of the utility model;

[0025] Figure 6 This is an overall structural view of the first clamping sleeve, the second clamping sleeve and the rotary fixing pin of the utility model.

[0026] Description of reference numerals:

[0027] 1. Frame; 2. Shaft; 3. Cylinder; 4. Lower clamp; 5. Inner clamp; 6. Fixing bolt; 7. Propelling mechanism; 8. Milling cutter mechanism; 9. Connecting mechanism; 10. First clamping sleeve; 11. Second clamping sleeve; 12. Rotary fixing pin; 13. Pin rebound block; 14. Friction layer; 15. Handle; 701. Propelling frame; 702. Propelling fixing block; 703. Propelling rod; 704. Connecting rod; 705. Hand wheel; 801. Milling cutter frame; 80 2. Fixing hoop; 803. Latch; 804. Rotating cutter disc; 805. Cutter bar fixing seat; 806. Cutter bar fixing sliding seat; 807. Grooving cutter mounting hole; 808. Grooving cutter; 809. Blade fixing seat; 810. Blade; 811. Center bushing; 812. Adjusting rod; 813. Pistol drill; 901. Cross fixing block; 902. Fixing disc; 903. Opening fixing block; 904. Rotating block; 905. Cross slot; 906. Push rod. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figures 1 to 6 , the utility model provides a technical solution:

[0030] A high-efficiency milling cutter structure for RTP pipe welding comprises a frame 1, a shaft 2 is arranged on the frame 1, a cylinder 3 is arranged at one end of the shaft 2, a lower clamp 4 is arranged on the shaft 2, an inner clamp 5 is arranged on the cylinder 3, the inner clamps 5 are in a plurality and are arranged linearly, fixing bolts 6 are arranged on the lower clamp 4 and the inner clamp 5, a propulsion mechanism 7 capable of adjusting a feed speed is arranged at one end of the frame 1, a milling cutter mechanism 8 is arranged on the propulsion mechanism 7, and a connecting mechanism 9 is arranged between the propulsion mechanism 7 and the milling cutter mechanism 8.

[0031] Specifically, Figure 2 As shown, the propulsion mechanism 7 includes a propulsion frame 701, a propulsion fixed block 702, a propulsion rod 703, a connecting rod 704 and a handwheel 705. The propulsion frame 701 is arranged on the frame 1, the propulsion fixed block 702 is arranged on the propulsion frame 701, the propulsion rod 703 is arranged on the propulsion fixed block 702 and passes through the propulsion fixed block 702, the connecting rod 704 is arranged on the propulsion fixed block 702 and connected to the propulsion rod 703, and the handwheel 705 is arranged on the connecting rod 704.

[0032] Specifically, Figure 3As shown, the milling cutter mechanism 8 includes a milling cutter holder 801, a fixing hoop 802, a latch 803, a rotating cutter disc 804, a shank fixing seat 805, a shank fixing sliding seat 806, a groove cutter mounting hole 807, a groove cutter 808, a blade fixing seat 809, a blade 810, a center bushing 811, an adjusting rod 812 and a pistol drill 813. The milling cutter holder 801 is arranged on one side of the propulsion frame 701, the fixing hoop 802 is arranged on the side wall of the milling cutter holder 801, the fixing hoop 802 is arranged in cooperation with the shaft 2, the latch 803 is arranged on the fixing hoop 802, the rotating cutter disc 804 is arranged on the milling cutter holder 801, the shank fixing seat 805 is arranged on the rotating cutter disc 804, and the shank fixing seat 805 is arranged on the rotating cutter disc 804. On the rotating cutter disc 804, the tool rod fixing sliding seat 806 is arranged on the tool rod fixing seat 805, the groove cutter mounting hole 807 is arranged on the tool rod fixing sliding seat 806, the groove cutter 808 is arranged on the groove cutter mounting hole 807, the blade fixing seat 809 is arranged on one side of the tool rod fixing seat 805, the blade 810 is arranged on the blade fixing seat 809, the center bushing 811 is arranged between the tool rod fixing seat 805 and the blade fixing seat 809, the adjusting rod 812 is arranged on the tool rod fixing seat 805 and connected to the tool rod fixing sliding seat 806, and the pistol drill 813 is arranged on the milling cutter holder 801 and the output end is connected to the rotating cutter disc 804.

[0033] Specifically, Figure 4 and Figure 5 As shown, the connecting mechanism 9 includes a cross fixing block 901, a fixing disk 902, an open fixing block 903, a rotating block 904, a cross slot 905 and a push rod 906. The cross fixing block 901 is arranged on the side of the propulsion frame 701 away from the propulsion fixing block 702, the fixing disk 902 is arranged on the side of the milling cutter frame 801 away from the rotating cutter disk 804, the open fixing block 903 is arranged on the fixing disk 902, the rotating block 904 is arranged on the inner wall of the open fixing block 903, the cross slot 905 is arranged on the rotating block 904, and the push rod 906 is arranged on the rotating block 904.

[0034] When in use, first, the shaft 2 is set on the frame 1, and the lower clamp 4 and the inner clamp 5 are set on the shaft 2 to fix the RTP tube, and then the oil cylinder 3 can push the RTP tube to move, and then the push frame 701 is fixed to one side of the frame 1, and then the cross groove 905 on the milling cutter frame 801 is aligned with the cross fixing block 901 on the push frame 701, so that the cross fixing block 901 enters the cross groove 905, and then the push rod 906 is rotated to make the rotating block 904 rotate on the open fixing block 903, and then the cross fixing block 901 is fixed in the cross groove 905, and then the milling cutter frame 801 is fixed on the push frame 701 Then the push fixing block 702 is installed on the push frame 701 to fix and support the push rod 703 and ensure that it can stably perform linear motion. By rotating the hand wheel 705, the rotational motion of the hand wheel 705 is converted into linear motion through the connecting rod 704 and transmitted to the push rod 703. Driven by the connecting rod 704, the push rod 703 performs linear motion along the axis 2 direction, thereby achieving the propulsion of the target component. The push frame 701 and the push fixing block 702 maintain structural stability to ensure that the motion trajectory of the push rod 703 is stable and accurate. Then the fixing hoop 802 cooperates with the latch 803 to move the milling cutter holder. 801 is fixed on shaft 2 to prevent loosening, the rotating cutter disc 804 is installed on the milling cutter holder 801, the tool bar fixing seat 805 is located on the rotating cutter disc 804, and then the tool bar fixing sliding seat 806 is installed on the tool bar fixing seat 805, which can slide in a certain direction to adjust the position of the buckle groove knife 808, and then the buckle groove knife mounting hole 807 is set on the tool bar fixing sliding seat 806, and the buckle groove knife 808 is installed on the buckle groove knife mounting hole 807, which is responsible for the main milling work, and the blade fixing seat 809 is located on one side of the tool bar fixing seat 805, and the blade 810 is installed on the blade fixing seat 809, which can remove the RTP The glass fiber on the tube, and then the pistol drill 813 is set on the milling cutter holder 801, and its output end is connected with the rotating cutter disc 804 to provide rotational power for the rotating cutter disc 804. When in use, the operator starts the pistol drill 813, and the pistol drill 813 drives the rotating cutter disc 804 to rotate, and the rotating cutter disc 804 drives the buckle groove cutter 808 and the blade 810 thereon to rotate together to perform milling operations. According to processing requirements, the operator can adjust the position of the buckle groove cutter 808 through the adjusting rod 812 to change the milling depth and range, so as to remove the glass fiber on the RTP tube and then perform milling of the pin end face, so as to better perform subsequent hot melt welding.

[0035] Specifically, Figure 6 As shown, the lower clamp 4 and the inner clamp 5 include a first clamping sleeve 10 and a second clamping sleeve 11, which are sleeved with each other, and a rotary fixing pin 12 is provided at one end of the first clamping sleeve 10 and the second clamping sleeve 11, and a latch rebound block 13 is provided at the other end of the first clamping sleeve 10 and the second clamping sleeve 11.

[0036] Specifically, Figure 2 As shown, a friction layer 14 for increasing friction force is provided on the hand wheel 705 .

[0037] Specifically, Figure 3 As shown, the fixing hoop 802 is semicircular in shape, and the diameter of the fixing hoop 802 is consistent with that of the shaft 2 .

[0038] Specifically, Figure 3 As shown, a handle 15 is provided on the side wall of the milling cutter holder 801 for easy taking.

[0039] When in use, the lower clamp 4 and the inner clamp 5 include a first clamping sleeve 10 and a second clamping sleeve 11, and the first clamping sleeve 10 and the second clamping sleeve 11 are connected by a latch rebound block 13 and a swivel fixing pin 12. When the RTP tube needs to be removed, it is only necessary to pull out the latch rebound block 13 to allow the second clamping sleeve 11 to rotate along the swivel fixing pin 12 to remove the RTP tube. Then the friction layer 14 on the handwheel 705 can increase the friction between the staff's palm and the handwheel 705 to avoid slipping. Then the handle 15 can facilitate the staff to take the milling cutter holder 801.

[0040] By adopting the above technical solution, the problem of an existing RTP pipe welding high-efficiency milling cutter structure that the feed speed cannot be well controlled only by gears, racks and linear rails and the milling accuracy is easily reduced if the feed speed is too fast is solved.

[0041] Working principle: When the present application is in use, first, the shaft 2 is set on the frame 1, and the shaft 2 is provided with a lower clamp 4 and an inner clamp 5, which can fix the RTP tube, and then the cylinder 3 can push the RTP tube to move, and then the propulsion frame 701 is fixed to one side of the frame 1, and then the cross groove 905 on the milling cutter frame 801 is aligned with the cross fixing block 901 on the propulsion frame 701, so that the cross fixing block 901 enters the cross groove 905, and then the push rod 906 is rotated to make the rotating block 904 rotate on the open fixing block 903, and then the cross fixing block 901 is fixed in the cross groove 905, and then the milling cutter frame 801 is fixed on the propulsion frame 701, and then the propulsion fixing block 702 is installed on the propulsion frame 701 to fix and support the propulsion rod 703, and ensure that it can stably perform linear motion. By rotating the hand wheel 705, the rotational motion of the hand wheel 705 is converted into linear motion through the connecting rod 704 and transmitted to the propulsion rod 703. Driven by the connecting rod 704, the propulsion rod 703 performs linear motion along the axis 2 direction, thereby realizing the propulsion of the target component. The propulsion frame 701 and the propulsion fixing block 702 maintain structural stability to ensure that the motion trajectory of the propulsion rod 703 is stable and accurate. Then the fixing hoop 802 cooperates with the latch 803 to fix the milling cutter frame 801 on the axis 2 to prevent loosening. The rotating cutter disc 804 is installed on the milling cutter frame 801, the tool bar fixing seat 805 is located on the rotating cutter disc 804, and then the tool bar fixing sliding seat 806 is installed on the tool bar fixing seat 80 5, which can slide in a certain direction to adjust the position of the groove cutter 808, and then the groove cutter mounting hole 807 is set on the tool bar fixed sliding seat 806, and the groove cutter 808 is installed on the groove cutter mounting hole 807, which is responsible for the main milling work, the blade fixing seat 809 is located on one side of the tool bar fixing seat 805, and the blade 810 is installed on the blade fixing seat 809, which can remove the glass fiber on the RTP pipe, and then the pistol drill 813 is set on the milling cutter holder 801, and its output end is connected to the rotating cutter disc 804 to provide rotational power for the rotating cutter disc 804. When in use, the operator starts the pistol drill 813, and the pistol drill 813 drives the rotating cutter disc 804 to rotate, and the rotating cutter disc 804 drives the groove cutter 808 and the blade 810 thereon to rotate together. The operator can adjust the position of the groove cutter 808 by adjusting the rod 812 to change the milling depth and range according to the processing requirements, so as to remove the glass fiber on the RTP tube and then perform the milling pin end face, so as to better perform the subsequent hot melt welding. Then the lower clamp 4 and the inner clamp 5 include a first clamping sleeve 10 and a second clamping sleeve 11, and the first clamping sleeve 10 and the second clamping sleeve 11 are connected by a latch rebound block 13 and a rotary fixed pin 12. When the RTP tube needs to be removed, the latch rebound block 13 only needs to be pulled outward, so that the second clamping sleeve 11 can be rotated along the rotary fixed pin 12 to take out the RTP tube. Then the friction layer 14 on the hand wheel 705 can increase the friction between the palm of the staff and the hand wheel 705.To avoid slipping, the handle 15 can facilitate the staff to take the milling cutter holder 801.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. An RTP pipe welding high-efficiency milling cutter structure, comprising a frame (1), characterized in that: The frame (1) is provided with a shaft (2), one end of the shaft (2) is provided with a cylinder (3), the shaft (2) is provided with a lower clamp (4), the cylinder (3) is provided with an inner clamp (5), the inner clamps (5) are multiple and arranged linearly, the lower clamp (4) and the inner clamp (5) are both provided with fixing bolts (6), one end of the frame (1) is provided with a propulsion mechanism (7) capable of adjusting the feed speed, the propulsion mechanism (7) is provided with a milling cutter mechanism (8), and a connecting mechanism (9) is provided between the propulsion mechanism (7) and the milling cutter mechanism (8).

2. The RTP pipe welding high-efficiency milling cutter structure according to claim 1, characterized in that: The propulsion mechanism (7) comprises a propulsion frame (701), a propulsion fixing block (702), a propulsion rod (703), a connecting rod (704) and a hand wheel (705); the propulsion frame (701) is arranged on the frame (1); the propulsion fixing block (702) is arranged on the propulsion frame (701); the propulsion rod (703) is arranged on the propulsion fixing block (702) and passes through the propulsion fixing block (702); the connecting rod (704) is arranged on the propulsion fixing block (702) and connected to the propulsion rod (703); and the hand wheel (705) is arranged on the connecting rod (704).

3. The RTP pipe welding high-efficiency milling cutter structure according to claim 2, characterized in that: The milling cutter mechanism (8) comprises a milling cutter frame (801), a fixing hoop (802), a latch (803), a rotating cutter disc (804), a shank fixing seat (805), a shank fixing sliding seat (806), a slotting cutter mounting hole (807), a slotting cutter (808), a blade fixing seat (809), a blade (810), a center bushing (811), an adjustment rod (812) and a pistol drill (813); the milling cutter frame (801) is arranged on one side of the propulsion frame (701); the fixing hoop (802) is arranged on a side wall of the milling cutter frame (801); the fixing hoop (802) is arranged in cooperation with the shaft (2); the latch (803) is arranged on the fixing hoop (802); the rotating cutter disc (804) is arranged on the milling cutter frame (801); the shank fixing seat (805) is arranged on the The tool is placed on a rotating cutter disc (804); the tool bar fixing sliding seat (806) is arranged on the tool bar fixing seat (805); the groove knife mounting hole (807) is arranged on the tool bar fixing sliding seat (806); the groove knife (808) is arranged on the groove knife mounting hole (807); the blade fixing seat (809) is arranged on one side of the tool bar fixing seat (805); the blade (810) is arranged on the blade fixing seat (809); the center bushing (811) is arranged between the tool bar fixing seat (805) and the blade fixing seat (809); the adjustment rod (812) is arranged on the tool bar fixing seat (805) and connected to the tool bar fixing sliding seat (806); and the pistol drill (813) is arranged on the milling cutter holder (801) and the output end is connected to the rotating cutter disc (804).

4. The RTP pipe welding high-efficiency milling cutter structure according to claim 3 is characterized in that: The connecting mechanism (9) comprises a cross fixing block (901), a fixing disk (902), an open fixing block (903), a rotating block (904), a cross slot (905) and a push rod (906); the cross fixing block (901) is arranged on a side of the propulsion frame (701) away from the propulsion fixing block (702); the fixing disk (902) is arranged on a side of the milling cutter frame (801) away from the rotating cutter disk (804); the open fixing block (903) is arranged on the fixing disk (902); the rotating block (904) is arranged on the inner wall of the open fixing block (903); the cross slot (905) is arranged on the rotating block (904); and the push rod (906) is arranged on the rotating block (904).

5. The RTP pipe welding high-efficiency milling cutter structure according to claim 1, characterized in that: The lower clamp (4) and the inner clamp (5) comprise a first clamping sleeve (10) and a second clamping sleeve (11), the first clamping sleeve (10) and the second clamping sleeve (11) being sleeved with each other, one end of the first clamping sleeve (10) and the second clamping sleeve (11) being provided with a swivel fixing pin (12), and the other end of the first clamping sleeve (10) and the second clamping sleeve (11) being provided with a latch springback block (13).

6. The RTP pipe welding high-efficiency milling cutter structure according to claim 2, characterized in that: The hand wheel (705) is provided with a friction layer (14) for increasing friction force.

7. The RTP pipe welding high-efficiency milling cutter structure according to claim 3, characterized in that: The fixing hoop (802) is arranged in a semicircular shape, and the diameter of the fixing hoop (802) is consistent with that of the shaft (2).

8. The RTP pipe welding high-efficiency milling cutter structure according to claim 3, characterized in that: A handle (15) is provided on the side wall of the milling cutter holder (801) for easy picking.

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