Multi-rack Y-shaped aluminum alloy bar rolling equipment

Abstract

The invention relates to the technical field of metal rolling, in particular to multi-rack Y-shaped aluminum alloy bar rolling equipment which comprises four sets of integrated rolling mills and two sets of single-drive rolling mills which are arranged in a line and transversely connected, the integrated rolling mills and the single-drive rolling mills are the same in structure, and the four sets of integrated rolling mills are in butt joint end to end. A connecting mechanism is installed between every two adjacent sets of integrated rolling mills, limiting Y rings arranged on the connecting mechanisms are used for limiting bars to prevent flash, every two adjacent sets of single-drive rolling mills are connected through a connecting mechanism, and the rear sides of the four sets of integrated rolling mills and the rear sides of the two sets of single-drive rolling mills are driven to operate through a driving mechanism. The reduction of the stall probability of a rack is facilitated, the two sets of single-drive rolling mills are independently driven through the single-drive pieces, rounding of various specifications is facilitated, compensation of long-term use abrasion and the like is improved, the hole pattern is closer to a design value, and the three-roller Y-shaped rolling mill has the advantages of being large in rolling pressure, high in torque, adjustable in hole pattern, not prone to producing lugs in the rolling process and more accurate in rounding.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal rolling, in particular to a multi-stand Y-shaped aluminum alloy bar rolling equipment. BACKGROUND

[0002] Aluminum alloy bars are widely used in modern industrial systems and can be used for machining equipment such as couplings, and can also be used for forging high-performance components such as control arms. Traditional aluminum alloy extruded bars are generally manufactured by extrusion. Aluminum alloy extrusion generally involves feeding heated bar stock into an extrusion cylinder, and then extruding it through a die under the action of an extrusion rod to obtain the desired bar. For example, the three-roll rolling mill roll stand with roll balancing device and three-roll rolling mill disclosed in CN115945518A includes an inner frame, the inner frame includes two side plates arranged at intervals in front and back, and three sets of roll units are arranged between the two side plates. The roll unit includes a roll assembly and a roll balancing device. When the roll assembly is subjected to a pressure directed towards the center line of the rolling, the roll balancing device can provide a counterforce to the roll assembly. The three-roll rolling mill roll stand avoids the problem that the centers of the three rolls of the lever-type roll stand cannot completely coincide with the center of the stand within the adjustment range, and solves the problem that the vertical reduction-type roll stand is not suitable for lateral roll changing and the roll changing operation is complex, and has the characteristics of simple and reasonable structure, convenient operation and maintenance, low cost, safety and reliability, etc. The rolling mill in the prior art can meet the needs of use, but due to the limitations of the length of the die cylinder, the extrusion force of the extruder and the extrusion process, the yield of the aluminum alloy bars produced by this method is generally only about 75%, and the extrusion speed is slow. The friction between the bar and the die and between the bar and the extrusion cylinder easily causes uneven deformation of the internal structure of the bar, resulting in uneven product organization and performance, and affecting the final use effect of the product. SUMMARY

[0003] The purpose of the present application is to provide an aluminum alloy bar rolling device that can achieve rapid rolling of aluminum alloy bars.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical solution: a multi-stand Y-shaped aluminum alloy bar rolling equipment, including four groups of integrated rolling mills and two groups of single-drive rolling mills arranged in a straight line and connected horizontally, the structure of the integrated rolling mill and the single-drive rolling mill is the same, the four groups of integrated rolling mills are butt-jointed at the head and tail, a connecting mechanism is installed between the two adjacent groups of integrated rolling mills, a limiting Y ring is provided on the connecting mechanism to limit the bar to prevent flash, the two adjacent groups of single-drive rolling mills are also connected by a connecting mechanism, and the rear sides of the four groups of integrated rolling mills and the two groups of single-drive rolling mills are driven to operate by a driving mechanism.

[0005] Preferably, the single group of the integrated rolling mill comprises a front butt joint shell and a rear butt joint shell, the front butt joint shell and the rear butt joint shell are structurally identical, the front butt joint shell and the rear butt joint shell are butt jointed and installed, a rolling mechanism is installed at the center of the front butt joint shell and the rear butt joint shell, three groups of positioning rings are fixed on the outer wall of the front butt joint shell and the rear butt joint shell in an inverted triangular orientation, and a connecting block is fixed on the front and rear side of the front butt joint shell and the rear butt joint shell.

[0006] Preferably, the top end of the front butt joint shell is provided with an ear, and a circular cavity is formed in the center of the front butt joint shell, and three groups of U-shaped cavities are formed in the side of the circular cavity in a Y shape.

[0007] Preferably, the rolling mechanism comprises a main shaft and a connecting shaft, the main shaft is horizontally installed at the center of the top end U-shaped cavity, the rear end of the main shaft is fixedly provided with the connecting shaft, the center of the main shaft is fixedly provided with a main roller, the two sides of the main roller are fixedly provided with main bevel gears, the bottom ends of the two groups of main bevel gears are respectively engaged with auxiliary bevel gears, the two groups of auxiliary bevel gears are respectively fixedly provided on the upper sides of the corresponding auxiliary shafts, the two groups of auxiliary shafts are obliquely installed inside the remaining two groups of U-shaped cavities, the centers of the two groups of auxiliary shafts are fixedly provided with auxiliary rollers, the two groups of auxiliary rollers and the main roller are in a Y shape, and Y-shaped mounting frames are arranged at the front and rear ends of the rolling mechanism for limiting and fixing.

[0008] Preferably, the rear end of the connecting shaft is provided with an internal gear, four groups of butt joint holes are formed in the outer wall of the internal gear, the main bevel gears and the auxiliary bevel gears are emulsion lubricated, and the main shaft and the auxiliary shaft are sealed in the front butt joint shell and lubricated by lubricating grease.

[0009] Preferably, the connecting mechanism comprises a limiting Y ring and a connecting pin, the two ends of the limiting Y ring are respectively inserted into the corresponding three groups of positioning rings on the two sides, and the connecting pin is installed on the connecting blocks on the side of the adjacent two groups of rolling mills.

[0010] Preferably, the limiting Y ring comprises a hollow ring and three groups of extension plates, the hole diameter of the hollow ring is larger than the diameter of the bar, the three groups of extension plates are fixedly provided on the side of the hollow ring, and the top end of each of the three groups of extension plates is fixedly provided with a connecting column.

[0011] Preferably, the driving mechanism comprises a driving box, a total driving element and two groups of single driving elements, the inner rear end of the driving box is fixedly provided with a pad, the two groups of single driving elements are installed on the upper side of the pad, and the total driving element is installed at the front end of the driving box.

[0012] Preferably, the total drive includes a main motor and a drive rod, the main motor drives the drive rod installed in the drive box to rotate, the center of the drive rod is installed with four groups of worms, the upper side of the four groups of worms is provided with a main drive, the center of the four groups of main drives is installed on the front wall of the drive box, the rear end of the four groups of main drives is fixedly provided with a worm gear, the bottom end of the four groups of worm gears is engaged with the worm, the single drive includes a sub motor and a sub drive, two groups of sub drives are installed on the left side of the front wall of the drive box, the sub drive is directly driven by the sub motor, and the sub drive is the same in structure as the main drive.

[0013] Preferably, the single group of main drives includes a transmission shaft, a limiting bearing and a fixed bearing, the fixed bearing is installed on the front wall of the drive box, the center of the fixed bearing is provided with the transmission shaft, the rear end of the transmission shaft is provided with the limiting bearing, the limiting bearing is installed on the inner rear wall of the drive box, and the front end of the transmission shaft is fixedly provided with four groups of butt joint columns.

[0014] Compared with the prior art, the present application has the following beneficial effects: 1. Four groups of integrated rolling mills are driven by the total drive, the single drive is used for single driving of two groups of single rolling mills, various specifications of circle returning are facilitated, the motor speed and tension can be adjusted, the applicability of the device is improved, the two groups of main bevel gears and main rollers and the two groups of sub bevel gears and sub rollers are designed in Y shape in the rolling mechanism, the two groups of bevel gears are engaged for transmission, the compensation of long-term wear and the like is improved, the hole type is closer to the design value, the three-roll Y-type rolling mill has the advantages of large rolling pressure, high torque, adjustable hole type, no ear in rolling, more accurate circle returning and simple structure; 2. The diameters of the main bevel gear and the sub bevel gear are larger than those of the fixed main shaft and the fixed sub shaft, the service life is improved, the torque is increased, and the production efficiency is improved, the size of the roll gap or the rolling center is adjusted by the two groups of sub shafts, the adjustment amount is about 1.5 mm, the compensation of long-term wear and the like is improved, the hole type is closer to the design value, and the main drive provided in the total drive can synchronously drive the four groups of integrated rolling mills to run, thereby improving the efficiency; 3. The limiting Y ring provided between the two adjacent groups of rolling mills can reduce the spacing therebetween, the inner diameter of the hollow ring in the limiting Y ring is larger than the hole diameter of the bar, so that the bar can be effectively prevented from being deflected and twisted during conveying, the flash is prevented, and the stability is improved, the extension plates and the connecting columns provided on the side of the hollow ring effectively butt joint the centers of the two groups of rolling mills, so that the positioning effect is improved, the installation time is saved, and the use is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0016] Figure 1 It is a schematic diagram of the side view of the main structure of the present application. Figure 2 It is a schematic diagram of the front view of the main structure of the present application. Figure 3 It is a schematic diagram of the top view of the main structure of the present application. Figure 4 It is a schematic diagram of the front view of the installation of two groups of integrated rolling mills of the present application. Figure 5 It is a schematic diagram of the front view of the disassembly of two groups of integrated rolling mills of the present application. Figure 6 It is a schematic diagram of the disassembly of a single group of integrated rolling mills of the present application. Figure 7 It is a schematic diagram of the rear view of the integrated rolling mill of the present application. Figure 8 It is a schematic diagram of the rear view of the driving mechanism of the present application. Figure 9 It is a schematic diagram of the side view of the main driving part structure of the present application.

[0017] In the figure: 1, integrated rolling mill; 11, front butt joint shell; 111, lifting lug; 112, circular cavity; 113, U-shaped cavity; 12, rear butt joint shell; 13, rolling mechanism; 131, main rotating shaft; 132, connecting shaft; 1321, internal gear; 1322, butt joint hole; 133, main roller; 134, main bevel gear; 135, secondary bevel gear; 136, secondary roller; 137, secondary rotating shaft; 138, Y-shaped mounting frame; 14, positioning ring; 15, connecting block; 2, single drive rolling mill; 3, connecting mechanism; 31, limiting Y ring; 311, hollow circular ring; 312, extension plate; 313, connecting column; 32, connecting pin; 4, driving mechanism; 41, driving box; 411, cushion block; 42, main driving part; 421, main motor; 422, driving rod; 423, worm; 424, main driving part; 4241, transmission shaft; 4242, limiting bearing; 4243, fixed bearing; 4244, butt joint column; 425, worm gear; 43, single driving part; 431, secondary motor; 432, secondary driving part. DETAILED DESCRIPTION

[0018] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0019] Please refer to Figures 1-9 The present application provides an embodiment: a multi-stand Y-shaped aluminum alloy bar rolling equipment, comprising four groups of integrated rolling mills 1 and two groups of single-drive rolling mills 2 arranged in a line and connected horizontally, characterized in that: the integrated rolling mill 1 and the single-drive rolling mill 2 have the same structure, the four groups of integrated rolling mills 1 are butt-jointed at the head and tail, a connecting mechanism 3 is installed between the two adjacent groups of integrated rolling mills 1, the limiting Y ring 31 provided on the connecting mechanism 3 limits the bar to prevent flash, the connecting mechanism 3 is also used to connect the two adjacent groups of single-drive rolling mills 2, and the rear sides of the four groups of integrated rolling mills 1 and the two groups of single-drive rolling mills 2 are driven to rotate by the driving mechanism 4.

[0020] As a further embodiment of the present application, a single group of integrated rolling mill 1 comprises a front butt-joint shell 11 and a rear butt-joint shell 12, the front butt-joint shell 11 and the rear butt-joint shell 12 have the same structure, the front butt-joint shell 11 and the rear butt-joint shell 12 are butt-jointed, the rolling mechanism 13 is installed at the center of the front butt-joint shell 11 and the rear butt-joint shell 12, three groups of positioning rings 14 are fixed on the outer wall of the front butt-joint shell 11 and the rear butt-joint shell 12 in an inverted triangular orientation, the connecting blocks 15 are fixed on the front and rear sides of the front butt-joint shell 11 and the rear butt-joint shell 12, the lifting lug 111 is provided at the top end of the front butt-joint shell 11, the circular cavity 112 is provided at the center of the front butt-joint shell 11, three groups of U-shaped cavities 113 are provided at the side of the circular cavity 112 in a Y shape, which is beneficial to the rapid installation of the rolling mill and improves the efficiency, and the rolling mechanism is installed through the three groups of U-shaped cavities, so that the bar is better processed.

[0021] Further, the rolling mechanism 13 comprises a main rotating shaft 131 and a connecting shaft 132, the main rotating shaft 131 is horizontally installed at the center of the top U-shaped cavity 113, the rear end of the main rotating shaft 131 is fixedly provided with the connecting shaft 132, the center of the main rotating shaft 131 is fixedly provided with a main roller 133, both sides of the main roller 133 are fixedly provided with main bevel gears 134, the bottom ends of the two groups of main bevel gears 134 are respectively engaged with auxiliary bevel gears 135, the two groups of auxiliary bevel gears 135 are respectively fixedly provided on the upper sides of corresponding auxiliary rotating shafts 137, the two groups of auxiliary rotating shafts 137 are obliquely installed inside the remaining two groups of U-shaped cavities 113, the centers of the two groups of auxiliary rotating shafts 137 are fixedly provided with auxiliary rollers 136, the two groups of auxiliary rollers 136 and the main roller 133 are in Y shape, Y-shaped mounting frames 138 are arranged at the front and rear ends of the rolling mechanism 13 for limiting and fixing, the rear end of the connecting shaft 132 is provided with an internal gear 1321, four groups of butt joints 1322 are formed in the outer wall of the internal gear 1321, the main bevel gears 134 and the auxiliary bevel gears 135 are emulsion lubricated, the main rotating shaft 131 and the auxiliary rotating shaft 137 are sealed in the front butt joint shell 11 and are lubricated by lubricating grease, through the above design, the probability of frame stall can be reduced and the stability can be improved, at the same time, the three-roll Y-shaped rolling mill has large rolling pressure, high torque, adjustable pass, is not easy to produce ears in rolling, the rounding is more accurate, and the structure is simple.

[0022] Further, the connecting mechanism 3 comprises a limiting Y ring 31 and a connecting pin 32, the two ends of the limiting Y ring 31 are respectively inserted into the corresponding three groups of positioning rings 14 on the two sides, the connecting pin 32 is installed on the connecting blocks 15 on the sides of the adjacent two groups of rolling mills, the limiting Y ring 31 comprises a hollow ring 311 and three groups of extension plates 312, the hole diameter of the hollow ring 311 is larger than the diameter of the bar, the three groups of extension plates 312 are fixedly arranged on the side of the hollow ring 311, and the connecting columns 313 are fixedly arranged on the top ends of the three groups of extension plates 312, through the above design, the bar can be effectively prevented from being deflected and twisted during conveying, the flash is prevented, and the stability is improved.

[0023] Further, the driving mechanism 4 comprises a driving box 41, a total driving part 42 and two groups of single driving parts 43. The inner rear end of the driving box 41 is fixedly provided with a pad 411, the upper side of the pad 411 is installed with the two groups of single driving parts 43, the front end of the driving box 41 is installed with the total driving part 42, the total driving part 42 comprises a main motor 421 and a driving rod 422, the main motor 421 drives the driving rod 422 installed in the driving box 41 to rotate, the center of the driving rod 422 is installed with four groups of worm gears 423, the upper side of each of the four groups of worm gears 423 is provided with a main driving part 424, the center of the four groups of main driving parts 424 is installed on the front wall of the driving box 41, the rear end of the four groups of main driving parts 424 is fixedly provided with a worm wheel 425, the bottom end of the four groups of worm wheels 425 engages the worm gear 423, the single driving part 43 comprises an auxiliary motor 431 and an auxiliary driving part 432, the two groups of auxiliary driving parts 432 are installed on the left side of the front wall of the driving box 41, the auxiliary driving part 432 is directly driven by the auxiliary motor 431, the auxiliary driving part 432 is the same in structure as the main driving part 424, and through the above design, synchronous transmission of the four groups of integrated rolling mills can be realized, so that the stability during operation is further improved, and the equipment operation efficiency is improved.

[0024] Further, the single group of main driving parts 424 comprises a transmission shaft 4241, a limiting bearing 4242 and a fixed bearing 4243, the fixed bearing 4243 is installed on the front wall of the driving box 41, the center of the fixed bearing 4243 is provided with the transmission shaft 4241, the rear end of the transmission shaft 4241 is provided with the limiting bearing 4242, the limiting bearing 4242 is installed on the inner rear wall of the driving box 41, the front end of the transmission shaft 4241 is fixedly provided with four groups of butt joint columns 4244, the four groups of butt joint columns 4244 can be embedded in the four groups of butt joint holes 1322 of the inner gear 1321, and through the design, the transmission rolling mill can be conveniently connected, and the transmission is better.

[0025] Working principle: when operating, when installing four sets of integrated rolling mill 1 and two sets of single drive rolling mill 2, the limiting Y ring 31 can be placed at the center connection position first, first push the three groups of connecting columns 313 on the top of the three groups of extension plates 312 in the limiting Y ring 31 to the side of the positioning ring 14 fixed on one side of the rolling mill, after installation, the other side of the three groups of connecting columns 313 can be butt joint and embedded in the corresponding three groups of positioning ring 14, and the adjacent two groups of installed rolling mill can be installed and fixed through the connecting pin 32 through the connecting block 15, then drive the main motor 421 to run and drive the driving rod 422 to rotate in the driving box 41, the driving rod 41 rotates to drive the four groups of worm gears 423 fixed at the center to rotate, the worm gears 423 rotate to drive the top worm gears 425 to rotate, the worm gears 425 rotate to drive the transmission shafts 4241 to rotate in the limiting bearing 4242 and the fixed bearing 4243, the transmission shafts 4241 rotate to drive the four groups of butt joint columns 4244 fixed at the front end to rotate in the four groups of butt joint holes 1322 opened in the rear wall of the connecting shaft 132, the transmission shafts 4241 can drive the connecting shaft 132 to rotate, the connecting shaft 132 rotates to drive the internal main rotating shaft 131 to rotate, the main rotating shaft 131 rotates to drive the main rolling mill 133 fixed at the center and the main bevel gears 134 on both sides to rotate, the main bevel gears 134 on both sides rotate to drive the auxiliary bevel gears 135 on both sides to rotate, the auxiliary bevel gears 135 rotate to drive the auxiliary rotating shaft 137 fixed at the center to rotate in the U-shaped cavity 113, the auxiliary rotating shaft 137 rotates to drive the auxiliary rolling mill 136 at the center to rotate, the rotation of the two groups of auxiliary rolling mills 136 and main rolling mills 133 can drive the bar to be conveyed and rolled, thereby improving the rolling efficiency.

[0026] The above is only a preferred embodiment of the present application, and does not limit the present application in any form; any ordinary skilled person in the industry can easily implement the present application according to the drawings and the above description; however, any equivalent changes, modifications and evolution made by those skilled in the art without departing from the scope of the technical solution of the present application, using the above disclosed technical content, are equivalent embodiments of the present application; at the same time, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present application are still within the protection scope of the technical solution of the present application.

Claims

1. A multi-stand Y-type aluminum alloy bar rolling equipment comprising four groups of integrated rolling mills (1) and two groups of single-drive rolling mills (2) arranged in a line and connected laterally, characterized in that: The integrated rolling mill (1) is the same structure as the single-drive rolling mill (2), four groups of the integrated rolling mill (1) are butt-jointed, a connecting mechanism (3) is arranged between the adjacent two groups of the integrated rolling mill (1), the limiting Y ring (31) of the connecting mechanism (3) is arranged to limit the bar to prevent flash, the connecting mechanism (3) is also used to connect the adjacent two groups of the single-drive rolling mill (2), and the rear sides of the four groups of the integrated rolling mill (1) and the two groups of the single-drive rolling mill (2) are driven to rotate by the driving mechanism (4).

2. A multi-stand Y-type aluminum alloy bar rolling apparatus according to claim 1, characterized in that: One group of the integrated rolling mill (1) comprises a front butt-joint shell (11) and a rear butt-joint shell (12), the front butt-joint shell (11) and the rear butt-joint shell (12) are the same structure, the front butt-joint shell (11) and the rear butt-joint shell (12) are butt-jointed, a rolling mechanism (13) is arranged at the center of the front butt-joint shell (11) and the rear butt-joint shell (12), three groups of positioning rings (14) are arranged on the outer walls of the front butt-joint shell (11) and the rear butt-joint shell (12) in an inverted triangular orientation, and a connecting block (15) is arranged on the front and rear sides of the front butt-joint shell (11) and the rear butt-joint shell (12).

3. A multi-stand Y-type aluminum alloy bar rolling apparatus according to claim 2, characterized in that: A lifting lug (111) is arranged at the top end of the front butt-joint shell (11), a circular cavity (112) is arranged at the center of the front butt-joint shell (11), and three groups of U-shaped cavities (113) are arranged at the sides of the circular cavity (112) in a Y shape.

4. A multi-stand Y-type aluminum alloy bar rolling apparatus according to claim 2, characterized in that: The rolling mechanism (13) comprises a main rotating shaft (131) and a connecting shaft (132), the main rotating shaft (131) is horizontally arranged at the center of the top end U-shaped cavity (113), the rear end of the main rotating shaft (131) is fixedly provided with the connecting shaft (132), the center of the main rotating shaft (131) is fixedly provided with a main roller (133), the two sides of the main roller (133) are fixedly provided with main bevel gears (134), the bottom ends of the two groups of main bevel gears (134) are respectively engaged with auxiliary bevel gears (135), the two groups of auxiliary bevel gears (135) are respectively fixedly arranged on the upper sides of corresponding auxiliary rotating shafts (137), the two groups of auxiliary rotating shafts (137) are obliquely arranged in the remaining two groups of U-shaped cavities (113), the centers of the two groups of auxiliary rotating shafts (137) are fixedly provided with auxiliary rollers (136), the two groups of auxiliary rollers (136) and the main roller (133) are in a Y shape, and Y-shaped mounting frames (138) are arranged at the front and rear ends of the rolling mechanism (13) for limiting and fixing.

5. A multi-stand Y-type aluminum alloy bar rolling apparatus according to claim 4, characterized in that: The rear end of the connecting shaft (132) is provided with an internal gear (1321), four butt-joint holes (1322) are arranged on the outer wall of the internal gear (1321), the main bevel gears (134) and the auxiliary bevel gears (135) are lubricated by emulsion, and the main rotating shaft (131) and the auxiliary rotating shaft (137) are sealed in the front butt-joint shell (11) and are lubricated by lubricating grease.

6. A multi-stand Y-type aluminum alloy bar rolling apparatus according to claim 1, characterized in that: The connecting mechanism (3) comprises a limiting Y ring (31) and a connecting pin (32), the two ends of the limiting Y ring (31) are respectively inserted into the corresponding three groups of positioning rings (14) on the two sides, and the connecting pin (32) is arranged on the connecting blocks (15) on the sides of the adjacent two groups of rolling mills.

7. A multi-stand Y-type aluminum alloy bar rolling apparatus according to claim 1, characterized in that: The limiting Y ring (31) comprises a hollow circular ring (311) and three groups of extension plates (312), the hole diameter of the hollow circular ring (311) is larger than the diameter of the bar, and the side of the hollow circular ring (311) is fixed with three groups of extension plates (312), and the top of the three groups of extension plates (312) is fixed with a connecting column (313).

8. A multi-stand Y-type aluminum alloy bar rolling apparatus according to claim 1, characterized in that: The driving mechanism (4) comprises a driving box (41), a total driving piece (42) and two groups of single driving pieces (43), the inner rear end of the driving box (41) is fixedly provided with a pad (411), the upper side of the pad (411) is installed with two groups of single driving pieces (43), and the front end of the driving box (41) is installed with a total driving piece (42).

9. A multi-stand Y-type aluminum alloy bar mill according to claim 8, characterized in that: The total driving piece (42) comprises a main motor (421) and a driving rod (422), the main motor (421) drives the driving rod (422) installed in the driving box (41) to rotate, the center of the driving rod (422) is installed with four groups of worms (423), the upper side of each of the four groups of worms (423) is provided with a main driving piece (424), the center of each of the four groups of main driving pieces (424) is installed on the front wall of the driving box (41), the rear end of each of the four groups of main driving pieces (424) is fixedly provided with a worm wheel (425), the bottom end of each of the four groups of worm wheels (425) is engaged with the worm (423), the single driving piece (43) comprises a sub-motor (431) and a sub-driving piece (432), two groups of sub-driving pieces (432) are installed on the left side of the front wall of the driving box (41), the sub-driving piece (432) is directly driven by the sub-motor (431), and the sub-driving piece (432) is same in structure as the main driving piece (424).

10. A multi-stand Y-type aluminum alloy bar rolling apparatus according to claim 9, characterized in that: Each of the main driving pieces (424) comprises a transmission shaft (4241), a limiting bearing (4242) and a fixed bearing (4243), the fixed bearing (4243) is installed on the front wall of the driving box (41), the center of the fixed bearing (4243) is provided with the transmission shaft (4241), the rear end of the transmission shaft (4241) is provided with the limiting bearing (4242), the limiting bearing (4242) is installed on the inner rear wall of the driving box (41), and the front end of the transmission shaft (4241) is fixedly provided with four groups of butt joints (4244).

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