A modular hollow shaft wire drawing machine head

Abstract

The present application belongs to the technical field of glass fiber production, and specifically relates to a modular hollow shaft drawing machine head. The head comprises a hollow main shaft, an air supply pipe, a segmented aluminum rotor, a thermal break-type sheet expansion mechanism, and a sheet expansion telescopic mechanism. The hollow main shaft comprises a front winding shaft body and a rear assembly shaft body, wherein the front winding shaft body is provided with a front cavity, and the rear assembly shaft body is provided with an internal shaft air path. The air supply pipe is provided with a pipe body air path, which is arranged in the front cavity and connected to the internal shaft air path. The segmented aluminum rotor comprises several aluminum rotor sections, which are fixedly assembled on the front winding shaft body. The thermal break-type sheet expansion movable clamp is embedded in the aluminum rotor section. The sheet expansion telescopic mechanism is provided at both ends of the aluminum rotor section to realize the telescopic drive of the thermal break-type sheet expansion.

Description

Technical Field

[0001] The present application belongs to the technical field of glass fiber production, and specifically relates to a hollow shaft wire drawing machine head with a modular structure. Background Art

[0002] In glass fiber drawing production, there are typically two types of drawing machines: direct yarn drawing machines and cake yarn drawing machines. These machines have varying speeds, and high-speed centrifugal forces are significant. Direct yarn drawing machines, on the other hand, have a smaller head diameter, and the expansion and contraction of the sheet is primarily controlled by the cone sleeves at both ends. The middle cone sleeve, however, has limited space and thrust, so it can only serve as an auxiliary extension. The cone sleeves must also be symmetrically arranged, taking up a significant amount of space. Conversely, cake yarn drawing machines have a larger head diameter, typically featuring a large, long aluminum rotor. The front half is hollowed out, leaving the middle of the back half fixed to the spindle taper. The head's length is extended by the aluminum rotor to match the expansion sheet. However, the longer aluminum rotor and expansion sheet are particularly difficult to machine, especially the aluminum rotor, which requires complex processes such as deep hole drilling, taper turning, T-slot milling, and stress relief machining. The rotor is prone to damage, requiring a significant workload and difficult to guarantee quality. This presents particular challenges for users in terms of maintenance, as the overly long and heavy aluminum rotor is difficult to assemble and disassemble, requiring stringent requirements. At the same time, if the length of the expansion piece is too long, the rigidity of the middle part will inevitably be affected. The existing expansion piece telescopic mechanism is prone to soft waist due to insufficient holding force. Summary of the Invention

[0003] In view of this, the present application provides a hollow shaft wire drawing machine head with a modular structure to solve all or part of the technical problems described in the background technology part of the present application.

[0004] The solutions provided by this application to solve its technical problems are:

[0005] A modular hollow shaft wire drawing machine head, characterized in that: it includes a hollow main shaft, an air supply pipe, a segmented aluminum rotor, a broken bridge type sheet expansion, a sheet expansion and retraction mechanism, an upper wire ring, and a spring seat; the hollow main shaft includes a front end winding shaft body and a rear end assembly shaft body, the front end winding shaft body is provided with a front end cavity, and the rear end assembly shaft body is provided with an inner shaft air path; a pipe body air path is provided in the air supply pipe, the air supply pipe is provided in the front end cavity, and the pipe body air path is connected to the inner shaft air path; the segmented aluminum rotor includes several sections of aluminum rotor monomers, and the aluminum rotor monomers are fixedly assembled on the front end winding shaft body; the upper wire ring is provided at the front end of the front end winding shaft body, and the spring seat is provided at the rear end of the front end winding shaft body; the broken bridge type sheet expansion movable card is embedded in the aluminum rotor monomer; the sheet expansion and retraction mechanism is provided at both ends of the aluminum rotor monomer to realize the retraction and retraction drive of the broken bridge type sheet expansion.

[0006] The sheet expansion and retraction mechanism is set at both ends of the aluminum rotating drum unit, namely: between the upper wire ring and the adjacent aluminum rotating drum unit, between the spring seat and the adjacent aluminum rotating drum unit, and between every two adjacent aluminum rotating drum units.

[0007] Preferably, the expansion and retraction mechanism includes a piston ring, a ramp slider ring, a connecting rod slider, a connecting rod, a slider ring top spring, and a slider tension spring; the piston ring and the ramp slider ring are both arranged on the front winding shaft and contact and cooperate with each other, and the slider ring top spring rests on the ramp slider ring at an end different from the piston ring; a plurality of ramp slider grooves are provided on the ramp slider ring, and a ramp matching portion is provided on the connecting rod slider, and the connecting rod slider is movably assembled in the ramp slider groove; the two ends of the connecting rod are movably connected to the connecting rod slider and the aluminum drum unit respectively; the slider tension spring is wrapped around the connecting rod slider to provide radial tightening force for the connecting rod slider.

[0008] Preferably, the connecting rod includes a connecting rod portion and connecting rod heads disposed at both ends of the connecting rod portion; a cylinder upper rod head receiving position is disposed on the aluminum rotating cylinder, and an upper cylinder connecting rod movable opening is disposed at the edge of the cylinder upper rod head receiving position; a block upper rod head receiving position is disposed on the connecting rod slider, and an upper cylinder upper rod head movable opening is disposed at the edge of the block upper rod head receiving position; the connecting rod heads at both ends of the connecting rod are movably assembled in the cylinder upper rod head receiving position and the block upper rod head receiving position, respectively. Further preferably, the connecting rod head is a spherical connecting rod head.

[0009] Preferably, a piston ring drive cavity is formed between the front end winding shaft and the aluminum drum body, the piston ring is assembled in the piston ring drive cavity, and the pipe body air path is connected to the piston ring drive cavity.

[0010] Preferably, a piston ring assembly position is provided on the aluminum drum unit, and a piston ring drive cavity is defined between the front winding shaft and the piston ring assembly position; a fixed connection is established between the hollow main shaft and the air pipe by a hollow screw, and the air path of the pipe body is connected to the piston ring drive cavity through the hollow screw.

[0011] Preferably, there are two air delivery pipes; the two air delivery pipes are symmetrically arranged in the front end cavity.

[0012] Preferably, a slider spring groove is provided on the connecting rod slider, and the slider spring is arranged in the slider spring groove.

[0013] Preferably, the modular structure of the hollow shaft wire drawing machine head also includes a head front cover and a head rear cover; the head front cover is fixedly assembled on the wire ring, and the head rear cover is fixedly connected to the spring seat.

[0014] Preferably, the segmented aluminum rotor comprises at least two sections of aluminum rotor monomers, and a sheet expansion and retraction mechanism is provided between each two adjacent sections of the aluminum rotor monomers and on the outsides of the aluminum rotor monomers at both ends.

[0015] Preferably, the break bridge expansion plate is provided with a break bridge slot and a spring slot; a spring is provided in the spring slot; and a stretching mechanism is provided at a location corresponding to the break bridge slot. Further preferably, the spring slot is provided at both ends of the break bridge expansion plate, and the break bridge slot is provided between the spring slots at both ends.

[0016] Preferably, the movable snap-in connection between the thermally-broken bridge expansion piece and the aluminum rotary drum unit is as follows: a snap-in position is provided on the segmented aluminum rotary drum, and the connection part of the thermally-broken bridge expansion piece has a structure that matches the snap-in position; when the thermally-broken bridge expansion piece is movably snap-in in the snap-in position, this movable snap-in connection can prevent the thermally-broken bridge expansion piece from falling off radially from the segmented aluminum rotary drum.

[0017] Preferably, the connecting rod slider is arranged at a position corresponding to the broken bridge groove of the expansion piece; or in other words, the supporting position of the connecting rod slider against the broken bridge type expansion piece is basically aligned with the broken bridge groove of the expansion piece.

[0018] Preferably, the modular structure of the hollow shaft wire drawing machine head also includes a front bearing and bearing seat, an oil spray ring, a motor, a motor seat, a rear bearing and bearing seat, a dustproof deep palace, and a rotary joint; the rear end assembly shaft is transmission-connected to the motor, the front bearing and bearing seat, and the oil spray ring are arranged at the front end of the motor, the rear bearing and bearing seat, and the dustproof deep palace are arranged at the rear end of the motor, and the rotary joint is fixedly assembled at the end of the rear end assembly shaft; an oil mist channel is provided in the front bearing and the bearing seat, and the oil mist channel is connected to the oil spray ring; the modular structure of the hollow shaft wire drawing machine head also includes a barrel changing mechanism, which includes a barrel changing turntable and a barrel changing bearing.

[0019] Beneficial technical effects:

[0020] 1. The modular structure of the hollow shaft wire drawing machine head provided by this application adopts a segmented aluminum drum structure and a multi-point arrangement of the sheet expansion and retraction mechanism. The sheet expansion can be lightweight, with low centrifugal force and simple processing and installation. The remaining parts mounted on the main shaft can all be hot-extruded and assembled in modular production, and can be freely assembled like building blocks for multi-part drawing. This method can not only increase the main shaft diameter to increase rigidity, but also increase the piston cavity of the sheet expansion and retraction mechanism to increase the sheet expansion and retraction thrust. It solves the technical problem that the thrust of the cone sleeve is insufficient due to the limitation of the cavity, making the sheet expansion waist soft and unable to truly realize the drawing of ultra-long multi-part drawing heads.

[0021] 2. The expansion and retraction mechanism, consisting of a piston ring, ramp slider ring, connecting rod slider, connecting rod, slider ring top spring, and slider tension spring, allows the connecting rod slider to react quickly to driving force, reducing system response time and improving control accuracy and efficiency. Furthermore, the connecting rod's normal limiting force and radial support force ensure the efficiency of the expansion and retraction, enhancing the stability of the expansion and retraction action.

[0022] 3. The use of a broken bridge expansion plate combined with an independently developed expansion and retraction mechanism allows for lightweight expansion plates, which is beneficial to reducing the difficulty of processing, installation and maintenance of the expansion plates, as well as the centrifugal force during operation, reducing the power consumption of the wire drawing machine, and improving the expansion and retraction control accuracy of the expansion plates.

[0023] The technical solutions and technical effects of this application are described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 : Cross-sectional view of the front end of the hollow shaft wire drawing machine head with modular structure;

[0025] Figure 2 : Cross-section of the rear end of the hollow shaft wire drawing machine head with modular structure;

[0026] Figure 3 : Schematic diagram of the assembly relationship between the hollow main shaft and the gas pipe;

[0027] Figure 4 : Schematic diagram of the assembly relationship between the broken bridge expansion plate and the segmented aluminum rotating drum;

[0028] Figure 5 : Figure 1 A magnified view of the structure of part A in the middle;

[0029] Figure 6 : Cross-sectional view of the assembly relationship between the connecting rod slider and the ramp slider ring;

[0030] Figure 7 : Side view of the assembly relationship between the connecting rod slider and the ramp slider ring;

[0031] Icon Description:

[0032] 10-Hollow spindle, 20-Air pipe, 30-Segmented aluminum drum, 40-Broken bridge expansion plate, 50-Extension plate expansion mechanism, 60-Hollow screw, 70-Upper wire ring, 80-Nose front cover, 90-Spring seat, 100-Nose rear cover;

[0033] 110-front end winding shaft body, 120-rear end assembly shaft body, 1110-front end cavity, 1210-inner shaft air path;

[0034] 210-tube gas circuit;

[0035] 310-aluminum drum monomer;

[0036] 3110 - rod head receiving position on the cylinder, 3120 - connecting rod movable opening on the cylinder, 3130 - piston ring assembly position, 3140 - top spring seat hole, 3150 - locking position;

[0037] 410- expansion plate bridge slot, 420- expansion plate tension spring slot, 430- expansion plate tension spring;

[0038] 510-piston ring, 520-ramp slider ring, 530-connecting rod slider, 540-connecting rod, 550-slider ring top spring, 560-slider tension spring, 570-piston ring drive chamber;

[0039] 5210-slope slider slot, 5220-top spring socket;

[0040] 5310- upper rod head receiving position, 5320- upper connecting rod movable opening, 5330- tension spring groove, 5340- slope matching part;

[0041] 5410-connecting rod, 5420-connecting rod head;

[0042] 1-Front bearing and bearing seat, 2-Oil injection ring, 3-Motor, 4-Motor seat, 5-Rear bearing and bearing seat, 6-Dustproof deep palace, 7-Rotary joint, 8-Oil mist channel, 9-Cylinder changing mechanism;

[0043] 91- drum changing turntable, 92- drum changing bearing. DETAILED DESCRIPTION

[0044] Directions: See Figure 1 and Figure 2 , Figure 1 and Figure 2 The parts are joined along the omitted arcs to form a complete machine head. In this application, the front direction refers to the end of the machine head away from the motor base, and the direction opposite to the front is the rear direction. Correspondingly, the front end of a component or assembly refers to the end farther from the motor base, and the rear end of a component or assembly refers to the end closer to the motor base.

[0045] See also Figure 1-Figure 7 The modular structure of the hollow shaft wire drawing machine head includes a hollow main shaft 10, an air pipe 20, a segmented aluminum rotating drum 30, a broken bridge type expansion sheet 40, an expansion sheet telescopic mechanism 50, an upper wire ring 70, and a spring seat 90.

[0046] The hollow main shaft 10 includes a front winding shaft body 110 and a rear assembly shaft body 120 . A front cavity 1110 is provided inside the front winding shaft body 110 , and an intra-shaft air path 1210 is provided inside the rear assembly shaft body 120 .

[0047] The air supply pipe 20 is provided with a pipe body air path 210, which is fixedly assembled in the front cavity 1110. The pipe body air path 210 is connected to the shaft air path 1210 in the hollow main shaft 20. The hollow main shaft 10 and the air supply pipe 20 are fixedly connected by a hollow screw 60.

[0048] The segmented aluminum drum 30 includes several sections of aluminum drum units 310, which are fixedly assembled on the front winding shaft 110; the upper wire ring 70 is arranged at the front end of the front winding shaft 110, and the spring seat 90 is arranged at the rear end of the front winding shaft 110; the broken bridge expansion piece 40 is movably embedded in the aluminum drum unit 310.

[0049] By using segmented aluminum drum units 310, modular assembly of the wire drawing machine head can be achieved. The number of aluminum drum units 310 can be flexibly configured according to actual needs. In this embodiment, the head is provided with four segments of aluminum drum units 310, forming a four-part drawing head.

[0050] A telescopic mechanism assembly position is provided between every two adjacent aluminum rotating drum monomers 310, between the upper wire ring 70 and the adjacent aluminum rotating drum monomer 310, and between the spring seat 90 and the adjacent aluminum rotating drum monomer 310. A sheet expansion telescopic mechanism 50 is provided in the telescopic mechanism assembly position.

[0051] Due to the adoption of a segmented assembly of the aluminum rotor monomer 310 structure, multiple sheet expansion and retraction mechanisms 50 can be set between the aluminum rotor monomers 310. Therefore, even with an extremely long machine head and an extremely long sheet that is pulled in multiple parts, the sheet expansion can be automatically retracted and retracted by controlling the conduction of compressed air. Due to the multi-point sheet expansion and retraction mechanism 50 set on the machine head, it is possible to form a plurality of points of supporting force and tightening force in the length direction of the sheet expansion, thereby avoiding the soft waist phenomenon that often occurs in long sheet expansion on the machine head. Furthermore, a lightweight design of the sheet expansion can be achieved. The lightweight development of the sheet expansion is conducive to reducing the centrifugal force of the sheet expansion and the overall load of the wire drawing machine, reducing energy consumption, and improving control accuracy.

[0052] The modular hollow shaft wire drawing machine head also includes a head front cover 80 and a head rear cover 100; the head front cover 80 is fixedly assembled on the upper wire ring 70, and the head rear cover 100 is fixedly connected to the spring seat 90.

[0053] The thermal expansion plate 40 is provided with a thermal expansion slot 410 and a spring slot 420. A spring 430 is located within the spring slot 420. The spring 430 provides radial tightening force when the thermal expansion plate 40 is deployed, allowing it to automatically retract. The thermal expansion slot 410 prevents bending of overly long expansion plates.

[0054] The aluminum drum unit 310 is provided with a snap-in location 3150, and the connection portion of the thermal expansion plate 40 has a structure that matches the snap-in location 3150. When the thermal expansion plate 40 is movably snapped into the snap-in location 3150, this movable snap-in connection prevents the thermal expansion plate 40 from radially falling out of the segmented aluminum drum 30. For details on the movable snap-in connection between the aluminum drum and the expansion plate, please refer to the Chinese patent: "A Support Device for the Intermediate Conical Sleeve of a Die Head Expansion Plate" (Publication No. CN213803526U).

[0055] The expansion and retraction mechanism 50 includes a piston ring 510 , a ramp slider ring 520 , a connecting rod slider 530 , a connecting rod 540 , a slider ring top spring 550 , and a slider tension spring 560 .

[0056] A piston ring assembly position 3130 is provided on the aluminum drum unit 310, and a piston ring drive chamber 570 is defined between the front winding shaft 110 and the piston ring assembly position 3130. The pipe body air path 210 is connected to the piston ring drive chamber 570 through a hollow screw 60.

[0057] The piston ring 510 is assembled in the piston ring driving chamber 570 .

[0058] The ramp slider ring 520 is disposed on the front end winding shaft body 110 and is in contact with and cooperates with the piston ring 510 .

[0059] The ramp slider ring 520 is provided with a plurality of ramp slider grooves 5210, and the connecting rod slider 530 is provided with a ramp matching portion 5340. The connecting rod slider 530 is movably assembled in the ramp slider groove 5210; the ramp matching portion 5340 and the ramp groove bottom of the ramp slider groove 5210 cooperate with each other to form a sliding connection.

[0060] Both ends of the connecting rod 540 are movably connected to the connecting rod slider 530 and the aluminum drum unit 310 respectively.

[0061] The movable connection between the connecting rod 540, the connecting rod slider 530, and the aluminum drum unit 310 is as follows: the connecting rod 540 includes a connecting rod portion 5410 and connecting rod heads 5420 disposed at both ends of the connecting rod portion 5410; the aluminum drum unit 310 is provided with a cylinder upper rod head accommodating position 3110, and the edge of the cylinder upper rod head accommodating position 3110 is provided with a cylinder upper connecting rod movable opening 3120; the connecting rod slider 530 is provided with a block upper rod head accommodating position 5310, and the edge of the block upper rod head accommodating position 5310 is provided with a block upper connecting rod movable opening 5320; the connecting rod heads 5420 at both ends of the connecting rod 540 are movably assembled in the cylinder upper rod head accommodating position 3110 and the block upper rod head accommodating position 5310, respectively. The connecting rod heads 5420 are spherical connecting rod heads.

[0062] The aluminum drum unit 310, the upper wire ring 70, and the spring seat 90 are all provided with a top spring seat hole 3140. The ramp slider ring 520 is provided with a top spring insertion hole 5220. One end of the slider ring top spring 550 is positioned in the top spring seat hole 3140, and the other end is positioned in the top spring insertion hole 5220. Thus, one end of the slider ring top spring 550 rests on the side of the ramp slider ring 520 opposite the piston ring 510.

[0063] The connecting rod slider 530 is provided with a slider spring slot 5330, within which a slider spring 560 is disposed. The slider spring 560 surrounds the connecting rod slider 530 and provides radial tightening force for the connecting rod slider 530. The connecting rod slider 530 is positioned at a location corresponding to the rising bridge slot 410 of the thermal bridge expansion plate 40.

[0064] Implementation mechanism of the expansion and retraction mechanism:

[0065] When the compressed air is turned on, the piston ring 510 pushes the ramp slider ring 520 to move toward the front end, compressing the slider ring top spring 550; at the same time, after the connecting rod slider 530 loses the supporting effect of the ramp slider ring 520, it slides down along the ramp slider groove 5210 under the action of the slider tension spring 560. After losing the supporting effect of the connecting rod slider 530, the broken bridge expansion plate 40 contracts radially under the action of the expansion plate tension spring 430.

[0066] When the compressed air is disconnected, the ramp slider ring 520 pushes the piston ring 510 into the piston ring cavity 570 under the action of the slider ring top spring 550; at the same time, the connecting rod slider 530 slides up along the ramp slider groove 5210, and the broken bridge expansion piece 40 is expanded under the support of the connecting rod slider 530.

[0067] When the connecting rod slider 530 slides up or down along the slope slider groove 5210, the connecting rod 540 and the slope slider groove 5210 limit the up and down sliding range of the connecting rod slider 530 within a fixed range, so that when subjected to an upward sliding driving force or a downward sliding driving force, the connecting rod slider 530 can quickly and effectively respond, reduce invalid upward sliding or invalid downward sliding stroke, reduce system response time, and improve control accuracy and efficiency.

[0068] At the same time, when the expansion piece is lifted, the connecting rod 540 can also provide a normal limiting force (parallel to the hollow main shaft 10) on the connecting rod slider 530, preventing the connecting rod slider 530 from displacing on the expansion piece in a direction parallel to the hollow main shaft 10 when pushed by the ramp slider groove 5210, further ensuring the efficiency of the expansion piece extension. In addition, during the process of lifting the expansion piece, the connecting rod 540 can also provide radial support force to the connecting rod slider 530, partially absorbing the reaction force from the expansion piece, thereby balancing the force on the ramp slider ring 520 and improving the stability of the expansion piece extension action.

[0069] On a wire drawing machine with a multi-branch, ultra-long die head, as the length of the sheet increases, the middle part of the sheet will inevitably bend (soft waist). The cone sleeve set in the middle of the sheet on the existing wire drawing machine cannot solve the soft waist problem due to insufficient thrust, thus limiting the length development of the die head. This application uses a new type of independently developed sheet expansion and retraction mechanism to cooperate with the operation of the long die head. It not only solves the soft waist problem that is prone to occur in longer sheets, but also reduces system response time, improves control accuracy and control efficiency, and increases the stability of the sheet expansion and retraction movement. At the same time, because a plurality of sheet expansion broken bridge grooves 410 are provided on the broken bridge type sheet expansion 40, the bending deformation points of the longer sheet during operation will be concentrated in the sheet expansion broken bridge groove 410, and a sheet expansion retraction mechanism 50 is provided corresponding to each sheet expansion broken bridge groove 410. Therefore, even if the sheet is ultra-long, lightweight and easily deformed, it will not experience the soft waist phenomenon during operation. Therefore, the modular structure of the hollow shaft wire drawing machine head disclosed in this application also allows for the lightweight development of the expansion sheet, thereby reducing the difficulty of processing and installing the expansion sheet and the centrifugal force during operation, reducing the power consumption of the wire drawing machine, and improving the expansion and contraction control accuracy of the expansion sheet.

[0070] In a modified embodiment of the present application, the modular structure of the hollow shaft wire drawing machine head also includes a front bearing and bearing seat 1, an oil spray ring 2, a motor 3, a motor seat 4, a rear bearing and bearing seat 5, a dustproof deep palace 6, and a rotary joint 7. The rear end assembly shaft 120 is transmission-connected to the motor 3, the front bearing and bearing seat 1, the oil spray ring 2 are arranged at the front end of the motor 3, the rear bearing and bearing seat 5, the dustproof deep palace 6 are arranged at the rear end of the motor 3, and the rotary joint 7 is fixedly assembled at the rear end end of the rear end assembly shaft 120; an oil mist channel 8 is provided in the front bearing and bearing seat 1, and the oil mist channel 8 is connected to the oil spray ring 2. The modular structure of the hollow shaft wire drawing machine head also includes a barrel changing mechanism 9, which includes a barrel changing turntable 91 and a barrel changing bearing 92. The barrel changing turntable 91 is used to drive the machine head to complete the barrel changing and flipping, and the barrel changing bearing 92 is used to support the rotation of the barrel changing turntable 91.

[0071] The technical solutions and technical effects of the present application are described in detail above in combination with the drawings and specific embodiments of the specification. It should be noted that technicians in this field can also develop other embodiments on this basis; any simple deformation and equivalent substitution that does not deviate from the innovative concept of the present application are covered by the present application and fall within the scope of protection of this patent.

Claims

1. A modular hollow shaft wire drawing machine head, characterized by: It includes a hollow main shaft (10), an air delivery pipe (20), a segmented aluminum rotating drum (30), a broken bridge type expansion plate (40), an expansion plate telescopic mechanism (50), an upper wire ring (70), and a spring seat (90); The hollow main shaft (10) comprises a front winding shaft body (110) and a rear assembly shaft body (120); a front cavity (1110) is provided inside the front winding shaft body (110), and an intra-shaft air path (1210) is provided inside the rear assembly shaft body (120); A tube body gas path (210) is provided in the gas delivery pipe (20), the gas delivery pipe (20) is provided in the front end cavity (1110), and the tube body gas path (210) is connected to the in-shaft gas path (1210); The segmented aluminum rotating drum (30) comprises a plurality of aluminum rotating drum units (310), and the aluminum rotating drum units (310) are fixedly assembled on the front winding shaft (110); The upper wire ring (70) is arranged at the front end of the front winding shaft (110), and the spring seat (90) is arranged at the rear end of the front winding shaft (110); The broken bridge expansion piece (40) is movably embedded in the aluminum drum unit (310); The sheet expansion and retraction mechanism (50) is arranged at both ends of the aluminum drum unit (310) to realize the retraction and retraction drive of the broken bridge type sheet expansion (40); The expansion and retraction mechanism (50) comprises a piston ring (510), a ramp slider ring (520), a connecting rod slider (530), a connecting rod (540), a slider ring top spring (550), and a slider tension spring (560); The piston ring (510) and the sloped slider ring (520) are both arranged on the front winding shaft (110) and contact and cooperate with each other, and the slider ring top spring (550) rests on the sloped slider ring (520) at an end different from the piston ring (510); The slope slider ring (520) is provided with a plurality of slope slider grooves (5210), the connecting rod slider (530) is provided with a slope matching portion (5340), and the connecting rod slider (530) is movably assembled in the slope slider grooves (5210); Both ends of the connecting rod (540) are movably connected to the connecting rod slider (530) and the aluminum drum unit (310) respectively; The slider tension spring (560) surrounds the connecting rod slider (530) and is used to provide radial tightening force for the connecting rod slider (530); A piston ring drive cavity (570) is formed between the front winding shaft (110) and the aluminum drum unit (310), the piston ring (510) is disposed in the piston ring drive cavity (570), and the pipe body air path (210) is connected to the piston ring drive cavity (570); A piston ring assembly position (3130) is provided on the aluminum drum unit (310), and the front winding shaft (110) and the piston ring assembly position (3130) define the piston ring drive chamber (570); The hollow main shaft (10) and the air delivery pipe (20) are fixedly connected via a hollow screw (60), and the pipe body air path (210) is connected to the piston ring drive chamber (570) via the hollow screw (60); The connecting rod (540) comprises a connecting rod portion (5410) and connecting rod heads (5420) arranged at both ends of the connecting rod portion (5410); The aluminum rotating drum unit (310) is provided with a drum upper rod head accommodating position (3110), and an drum upper connecting rod movable opening (3120) is provided at the edge of the drum upper rod head accommodating position (3110); The connecting rod slider (530) is provided with a block upper rod head accommodating position (5310), and the edge of the block upper rod head accommodating position (5310) is provided with a block upper connecting rod movable opening (5320); The connecting rod heads (5420) at both ends of the connecting rod (540) are movably assembled in the rod head accommodating position (3110) on the cylinder and the rod head accommodating position (5310) on the block, respectively.

2. The modular hollow shaft wire drawing machine head according to claim 1, characterized in that: A slider spring groove (5330) is provided on the connecting rod slider (530), and the slider spring (560) is arranged in the slider spring groove (5330).

3. The modular hollow shaft wire drawing machine head according to claim 1, characterized in that: The modular structure of the hollow shaft wire drawing machine head also includes a head front cover (80) and a head rear cover (100); The machine head front end cover (80) is fixedly assembled on the upper wire ring (70), and the machine head rear end cover (100) and the spring seat (90) are fixedly connected.

4. The modular hollow shaft wire drawing machine head according to claim 1, characterized in that: The segmented aluminum rotating drum (30) comprises at least two sections of the aluminum rotating drum monomers (310), and the sheet expansion and retraction mechanism (50) is provided between each two adjacent sections of the aluminum rotating drum monomers (310).

5. The modular hollow shaft wire drawing machine head according to claim 1, characterized in that: The broken bridge expansion piece (40) is provided with an expansion piece broken bridge groove (410) and an expansion piece tension spring groove (420); An expansion sheet tension spring (430) is provided in the expansion sheet tension spring groove (420); The expanding piece telescopic mechanism (50) is provided at a corresponding portion of the expanding piece broken bridge groove (410).

6. The modular hollow shaft wire drawing machine head according to claim 1, characterized in that: The modular hollow shaft wire drawing machine head further includes a front bearing and a bearing seat (1), an oil injection ring (2), a motor (3), a motor seat (4), a rear bearing and a bearing seat (5), a dustproof deep palace (6), and a rotary joint (7); The rear end assembly shaft (120) is transmission-connected to the motor (3); the front bearing and bearing seat (1) and the oil injection ring (2) are arranged at the front end of the motor (3); the rear bearing and bearing seat (5) and the dustproof deep palace (6) are arranged at the rear end of the motor (3); and the rotary joint (7) is fixedly assembled at the end of the rear end assembly shaft (120); An oil mist channel (8) is provided in the front bearing and the bearing seat (1), and the oil mist channel (8) is connected to the oil spray ring (2); The modular hollow shaft wire drawing machine head further comprises a barrel changing mechanism (9), and the barrel changing mechanism (9) comprises a barrel changing turntable (91) and a barrel changing bearing (92).

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