Gear hobbing device and method for gear box production

Abstract

The present invention relates to the technical field of gear hobbing equipment, and specifically discloses a gear hobbing device and method for gear box production, comprising a base, a fixing structure, a rolling structure and a biting structure, wherein the base is rectangular, and the fixing structure is fixedly arranged on the upper wall of the base close to the right end and located in front of the center line; the present invention has a simple structure, and realizes the clamping and movement of the workpiece and the selection of the hob through a simple slide rail and a biting structure, thereby simplifying the mechanical structure and reducing the complexity and cost of the equipment; the corresponding processing hob can be automatically selected to realize automated operation, and the selected tool can be adjusted according to actual needs to adapt to the processing of teeth of different proportions, thereby increasing the scope of application of the equipment; there is no need to purchase multiple devices, and one device can complete the processing of multiple gears, thereby saving the equipment investment cost; the angle of the hob relative to the workpiece can be adjusted and the corresponding hob can be replaced, thereby improving the adaptability and flexibility of gear processing.

Description

Technical Field

[0001] The invention relates to the technical field of gear hobbing equipment, and in particular to a gear hobbing device and method for producing a gear box. Background Art

[0002] Gear hobbing machine is a mechanical equipment used to manufacture gears. It processes the gear tooth shape by hobbing. The working principle of the gear hobbing machine is to use the relative movement between one or more pairs of hobs and the workpiece (gear blank) to form the gear tooth shape through a continuous hobbing process. In addition to gears of different sizes, the toothed workpiece in the gear box may also have a gear shaft, that is, teeth are also set at both ends of the shaft. The hobs required for processing gears of different sizes are also different. In particular, convex gears are used for simultaneous transmission of two poles and different transmission ratios at both ends of the gear shaft. Therefore, a gear hobbing device for gear box production is designed. Summary of the invention

[0003] The object of the present invention is to provide a gear hobbing device and method for gear box production to solve the problems raised in the above background technology.

[0004] In order to solve the above-mentioned problems, the present invention provides the following technical solutions: a gear hobbing device for gear box production, comprising a base, a fixing structure, a rolling structure and a biting structure, the base is rectangular, the fixing structure is fixedly arranged on the upper wall of the base near the right end, and is located in front of the center line, the rolling structure is fixedly arranged on the upper wall of the right end of the base, and is located behind the fixing structure, and the biting structure is fixedly arranged on the upper wall of the left end of the base, and is located on the left side of the rolling structure and corresponds to the rolling structure.

[0005] Preferably, the firmware structure includes a cross-shaped slide rail, a first slide rail, a frame, a first motor, a second slide rail and a pair of clamps; the cross-shaped slide rail is fixedly arranged on the upper wall of the base and close to the right end, the first slide rail is vertically arranged on the cross-shaped slide rail, and the first slide rail can move forward and backward and left and right through the cross-shaped slide rail, the frame is fixedly arranged on the first slide rail, and the frame can be lifted and moved through the first slide rail, the first motor is fixedly arranged in the frame, and the first motor driving end moves through the middle of the rear side wall of the frame, the second slide rail is fixedly arranged on the first motor driving end, and the second slide rail can be rotated by the first motor, the pair of clamps are both convex structures, one end of a pair of clamps are symmetrically arranged on the second slide rail, and the pair of clamps can move toward each other through the second slide rail.

[0006] Preferably, the rolling structure includes a first base, a driving box, three first shafts, three gears, a chain, a second motor, three first nuts and a first hydraulic cylinder; the first base is convex, one end of the first base is fixedly arranged on the upper wall of the rear end of the base and close to the right end, the driving box is a rectangular box, and the lower wall is symmetrically provided with a first flip arm, the driving box is movably arranged on the first base through the first flip arm, three first bearings are equidistantly arranged in the middle of the front side wall of the driving box, one end of the three first shafts is respectively fixed and penetrates the middle of the first bearing, and the three gears They are respectively fixedly mounted on one end of the first shaft rod and are located in the driving box, the chains are respectively movably mounted on the gears, and the chains are respectively engaged with the gears, the second motor is fixedly arranged on the rear side wall of the top end of the driving end, and the driving end of the second motor movably penetrates the rear side wall of the driving box, the driving end of the second motor is connected to one end of one of the first shaft rods, the three first nuts are respectively detachably screwed on the other end of the first shaft rod, one end of the first hydraulic cylinder is movably arranged on the upper wall of the base, and is located on the rear side of the driving box, and the other end of the first hydraulic cylinder is tilted and movably connected to the right side wall of the driving box.

[0007] Preferably, the biting structure includes a second base, a positioning frame, a third motor, a spiral rod, a moving platform, a second hydraulic cylinder, a third hydraulic cylinder and three groups of docking units; the second base is a T-shaped structure, one end of the second base is fixedly arranged on the upper wall of the base, close to the left end and corresponding to the first base, the positioning frame is a convex structure, and the width of the right side wall is smaller than the width of the left side wall, a pair of second flip arms are arranged at the bottom end of the positioning frame, the positioning frame is movably arranged on the second base through the second flip arms, a plurality of telescopic openings are equidistantly provided on the left side wall of the positioning frame, and the telescopic openings are respectively located on the front and rear sides of the right side wall of the positioning frame, the telescopic openings respectively correspond to the first shaft rod, and the right side of the positioning frame A lifting slot is provided in the middle of the side wall, the third motor is fixedly arranged on the upper wall of the positioning frame, and the driving end movably passes through the upper wall of the lifting slot, one end of the spiral rod is fixedly connected to the driving end of the third motor, and the other end is movably embedded in the lower wall of the lifting slot, one end of the moving platform is movably inserted in the lifting slot, and is screwed with the spiral rod, one end of the second hydraulic cylinder is fixedly arranged in the other end of the moving platform, the third hydraulic cylinder is the same as the first hydraulic cylinder, one end of the third hydraulic cylinder is movably arranged on the upper wall of the base and is located on the left side of the second base, the telescopic end of the third hydraulic cylinder is obliquely connected to the positioning frame, and corresponds to the first hydraulic cylinder, and the three groups of docking units are respectively detachably placed on the positioning frame.

[0008] Preferably, the second motor is driven to drive the screw rod to rotate, thereby causing the movable platform to move up and down and drive the second hydraulic cylinder to move into the telescopic frame of the corresponding roller.

[0009] Preferably, the docking unit includes a telescopic frame, a second shaft rod, a second nut, a pair of blocks, a baffle and a spring; two ends of the telescopic frame are movably inserted into the telescopic opening of the positioning frame, and the telescopic frame can be movably mounted on the second hydraulic cylinder, the other end of the telescopic frame is embedded with a second bearing and corresponds to the first bearing, one end of the second shaft rod is fixedly inserted into the middle of the second bearing at the other end of the telescopic frame and corresponds to one of the first shaft rods, the second shaft rod has the same structure as the first shaft rod, the second nut is detachably screwed to the other end of the second shaft rod, a pair of blocks are symmetrically arranged on the front and rear side walls of the telescopic frame and close to the middle, a pair of blocks can respectively fit with the positioning frame, the baffle is detachably arranged between the two ends of the telescopic frame, and the spring is fixedly arranged between the middle of the baffle and the left side wall of the positioning frame.

[0010] Preferably, roller cutters with different diameters are symmetrically mounted on the first shaft and the second shaft.

[0011] Preferably, the rollers on the telescopic frame can be fitted with the rollers on the first shaft by applying force with the help of the second hydraulic cylinder.

[0012] A method for using a gear hobbing device for gear box production comprises the following steps:

[0013] Step 1: fix the workpiece through the firmware structure, select the corresponding hob according to the needs of processing the workpiece, and convey the workpiece forward between the hobs, and fit the workpiece on the left side wall of the corresponding hob in the rolling structure;

[0014] Step 2: According to the selected roller cutter, the moving platform in the biting structure is controlled to be raised and lowered so that the second hydraulic cylinder is located in the telescopic frame of the corresponding roller cutter;

[0015] Step 3: Control the second hydraulic cylinder to move the corresponding telescopic frame to the right, so that another corresponding hob on the telescopic frame fits on the right side of the workpiece, so that the two hobs are clamped on both sides of the workpiece to apply force;

[0016] Step 4: Finally, the second motor on the driving box is controlled to drive the hob to rotate and perform gear hobbing;

[0017] Step 5: During processing, the angle of the hob relative to the workpiece can be synchronously adjusted by controlling the first hydraulic cylinder and the second hydraulic cylinder.

[0018] The present invention provides a gear hobbing device and method for gear box production, which has the following beneficial effects:

[0019] 1. Simple structure: The clamping and movement of the workpiece are achieved through simple slide rails and bite structures, as well as the selection of hobs, which simplifies the mechanical structure and reduces the complexity and cost of the equipment.

[0020] 2. High degree of automation: It can automatically select the corresponding processing hob to realize automated operation, thus improving production efficiency and processing accuracy.

[0021] 3. Strong flexibility: The selected tool can be adjusted according to actual needs to adapt to the processing of teeth of different proportions, which increases the scope of application of the equipment.

[0022] 4. Cost saving: No need to purchase multiple devices, one device can complete the processing of various gears, saving equipment investment costs.

[0023] 5. Easy adjustment: The angle of the hob relative to the workpiece can be adjusted, which can be used in conjunction with helical gear processing, improving the adaptability and flexibility of gear processing, and making it easy to replace and install the hob according to usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the assembly structure of the present invention.

[0025] Figure 2 The schematic diagram of the firmware structure of the present invention is shown.

[0026] Figure 3 It is a schematic diagram of the split structure of the rolling structure of the present invention.

[0027] Figure 4 It is a schematic diagram of the rolling structure assembly structure of the present invention.

[0028] Figure 5 It is a schematic diagram of the split structure of the biting structure of the present invention.

[0029] Figure 6 It is a schematic diagram of the assembly structure of the biting structure of the present invention.

[0030] Figure 7 For the present invention Figure 5 A partial enlarged view of point A in the figure.

[0031] Figure 8 For the present invention Figure 5 A partial enlarged view of point B in FIG.

[0032] In the figure: 1, base; 2, firmware structure; 21, cross-shaped slide rail; 22, first slide rail; 23, frame; 24, first motor; 25, second slide rail; 26, clamp; 3, rolling structure; 31, first base; 32, drive box; 33, first shaft rod; 34, gear; 35, chain; 36, second motor; 37, first nut; 38, first hydraulic cylinder; 4, biting structure; 41, second base; 42, adjustment frame; 43, third motor; 44, screw rod; 45, moving table; 46, second hydraulic cylinder; 47, third hydraulic cylinder; 48, docking unit; 481, telescopic frame; 482, second shaft rod; 483, second nut; 484, stopper; 485, baffle; 486, spring; 5, first bearing; 6, second bearing; 7, first flip arm; 8, second flip arm; 9, hob. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-8 The present invention provides a technical solution: a gear hobbing device for gear box production, comprising a base 1, a fixing structure 2, a rolling structure 3 and a biting structure 4, wherein the base 1 is rectangular, the fixing structure 2 is fixedly arranged on the upper wall of the base 1 near the right end, and is located in front of the center line, the rolling structure 3 is fixedly arranged on the upper wall of the right end of the base 1, and is located behind the fixing structure 2, and the biting structure 4 is fixedly arranged on the upper wall of the left end of the base 1, and is located on the left side of the rolling structure 3 and corresponds to the rolling structure 3; the workpiece is fixed and driven to move for delivery through the fixing structure 2, and a plurality of hobs 9 can be driven to rotate through the rolling structure 3, and the biting structure 4 can select the corresponding hob 9 according to the processing requirements and cooperate with the rolling structure 3 to apply force on both sides of the workpiece.

[0035] As a further solution of the present invention, the firmware structure 2 includes a cross-shaped slide rail 21, a first slide rail 22, a frame 23, a first motor 24, a second slide rail 25 and a pair of clamps 26; the cross-shaped slide rail 21 is fixedly arranged on the upper wall of the base 1 and close to the right end, the first slide rail 22 is vertically arranged on the cross-shaped slide rail 21, and the first slide rail 22 can move forward and backward and left and right through the cross-shaped slide rail 21, the frame 23 is fixedly arranged on the first slide rail 22, and the frame 23 can be lifted and moved through the first slide rail 22, the first motor 24 is fixedly arranged in the frame 23, and the first motor 2 The driving end of the frame 23 is movable and penetrates the middle of the rear side wall of the frame 23. The second slide rail 25 is fixedly arranged on the driving end of the first motor 24, and the second slide rail 25 can be rotated by the first motor 24. The pair of clamps 26 are both convex structures. One end of the pair of clamps 26 is symmetrically arranged on the second slide rail 25, and the pair of clamps 26 can move toward each other through the second slide rail 25. The cross-shaped slide rail 21 can drive the clamps 26 to move left and right and forward and backward. The second slide rail 25 can drive the clamps 26 to clamp or expand and fix the workpiece, and the first motor 24 can drive the clamps 26 to rotate.

[0036] As a further solution of the present invention, the rolling structure 3 includes a first base 31, a drive box 32, three first shafts 33, three gears 34, a chain 35, a second motor 36, three first nuts 37 and a first hydraulic cylinder 38; the first base 31 is convex, one end of the first base 31 is fixedly arranged on the upper wall of the rear end of the base 1 and close to the right end, the drive box 32 is a rectangular box, and the lower wall is symmetrically provided with a first flip arm 7, the drive box 32 is movably arranged on the first base 31 through the first flip arm 7, and three first bearings 5 ​​are equidistantly arranged in the middle of the front side wall of the drive box 32, one end of the three first shafts 33 is respectively fixed and penetrates the middle of the first bearing 5, and the three gears 34 are respectively fixedly sleeved on one end of the first shaft 33 and are located in the drive box 32. Inside, the chains 35 are movably mounted on the gears 34, and the chains 35 are respectively engaged with the gears 34, the second motor 36 is fixedly arranged on the rear side wall of the top end of the driving end, and the driving end of the second motor 36 movably penetrates the rear side wall of the driving box 32, the driving end of the second motor 36 is connected to one end of one of the first shaft rods 33, and the three first nuts 37 are respectively detachably screwed on the other end of the first shaft rod 33, one end of the first hydraulic cylinder 38 is movably arranged on the upper wall of the base 1, and is located on the rear side of the driving box 32, and the other end of the first hydraulic cylinder 38 is tilted and movably connected to the right side wall of the driving box 32; one of the first shaft rods 33 is driven to rotate by the second motor 36, and the rollers 9 on the three first shaft rods 33 are driven to rotate synchronously by means of the transmission of the gear 34 and the chain 35.

[0037] As a further solution of the present invention, the biting structure 4 includes a second base 41, a positioning frame 42, a third motor 43, a screw rod 44, a moving platform 45, a second hydraulic cylinder 46, a third hydraulic cylinder 47 and three groups of docking units 48; the second base 41 is a T-shaped structure, one end of the second base 41 is fixedly arranged on the upper wall of the base 1, close to the left end and corresponding to the first base 31, the positioning frame 42 is a convex structure, and the width of the right side wall is smaller than the width of the left side wall, a pair of second flip arms 8 are arranged at the bottom end of the positioning frame 42, the positioning frame 42 is movably arranged on the second base 41 through the second flip arms 8, a plurality of telescopic openings are equidistantly provided on the left side wall of the positioning frame 42, and the telescopic openings are respectively located on the front and rear sides of the right side wall of the positioning frame 42, and the telescopic openings respectively correspond to the first shaft rod 33, a lifting groove is provided in the middle of the right side wall of the positioning frame 42, the third motor 43 is fixedly arranged on the upper wall of the positioning frame 42, and the driving end movably passes through the lifting groove The upper wall of the groove, one end of the screw rod 44 is fixedly connected to the driving end of the third motor 43, and the other end is movably embedded in the lower wall of the lifting groove, one end of the moving platform 45 is movably inserted in the lifting groove, and is screwed with the screw rod 44, one end of the second hydraulic cylinder 46 is fixedly arranged in the other end of the moving platform 45, the third hydraulic cylinder 47 is the same as the first hydraulic cylinder 38, one end of the third hydraulic cylinder 47 is movably arranged on the upper wall of the base 1 and is located on the left side of the second base 41, the telescopic end of the third hydraulic cylinder 47 is obliquely connected to the adjustment frame 42, and corresponds to the first hydraulic cylinder 38, and the three groups of docking units 48 are respectively detachably arranged on the adjustment frame 42; the third motor 43 drives the screw rod 44 to rotate to cause the moving frame to rise and fall, and drives the second hydraulic cylinder 46 to select the corresponding telescopic frame 481 for corresponding, and the telescopic frame 481 can be pushed toward the drive box 32 by means of the extension of the second hydraulic cylinder 46, so that the corresponding hob 9 is clamped on both sides of the workpiece to apply force.

[0038] As a further solution of the present invention, the docking unit 48 includes a telescopic frame 481, a second shaft 482, a second nut 483, a pair of blocks 484, a baffle 485 and a spring 486; the two ends of the telescopic frame 481 are respectively movably inserted into the telescopic opening of the positioning frame 42, and the telescopic frame 481 can be movably mounted on the second hydraulic cylinder 46, and the other end of the telescopic frame 481 is embedded with a second bearing 6, and corresponds to the first bearing 5, one end of the second shaft 482 is fixedly inserted into the middle of the second bearing 6 at the other end of the telescopic frame 481, and corresponds to one of the first shafts 33, the second shaft 482 has the same structure as the first shaft 33, and the second nut 48 The second shaft 482 is detachably screwed to the other end thereof, a pair of the stoppers 484 are symmetrically arranged on the front and rear side walls of the telescopic frame 481 and close to the middle, and the pair of the stoppers 484 can respectively fit with the position adjustment frame 42, the baffle plate 485 is detachably arranged between the two ends of the telescopic frame 481, and the spring 486 is fixedly arranged between the middle of the baffle plate 485 and the left side wall of the position adjustment frame 42; the telescopic frame 481 can move on the position adjustment frame 42, so as to drive the hob 9 on the second shaft 482 to move relative to the first shaft 33, so as to realize the corresponding clamping and applying force on both sides of the workpiece, and the telescopic frame 481 loses the pushing force of the second hydraulic cylinder 46 and can be reset with the help of the spring 486.

[0039] As a further solution of the present invention, roller cutters 9 of different diameters are symmetrically mounted on the first shaft 33 and the second shaft 482 respectively; they are used for different processing requirements to achieve a one-machine-multiple-purposes effect.

[0040] As a further solution of the present invention, the hob 9 on the telescopic frame 481 can be fitted with the hob 9 on the first shaft 33 by means of the force applied by the second hydraulic cylinder 46, so as to apply force to the workpiece for gear hobbing.

[0041] Working principle: First, after the equipment is powered on by the stable support of the base 1, the workpiece is fixed by the firmware structure 2; that is, the two clamping claws 26 are driven by the second slide rail 25 to move relative to each other for clamping, or move in the opposite direction to insert into the shaft hole of the gear 34 blank to expand and fix outward; then, the cross-shaped slide rail 21 is used to drive the workpiece to move left and right and forward and backward, and the first slide rail 22 is used to move up and down, so that the workpiece is attached to the left side wall of the hob 9 used for processing, that is, the left side wall of the hob 9 on the first shaft rod 33;

[0042] After selecting the corresponding hob 9 according to the needs of the workpiece to be processed, the second motor 36 in the biting structure 4 is controlled to drive, driving the screw rod 44 to rotate to cause the moving platform 45 to move up and down, driving the second hydraulic cylinder 46 to move into the telescopic frame 481 of the corresponding hob 9;

[0043] By controlling the extension of the second hydraulic cylinder 46, the corresponding telescopic frame 481 is forced to move rightward with the help of the limit of the position adjustment frame 42, so that the other hob 9 on the telescopic frame 481 and the corresponding hob 9 on the drive box 32 are moved rightward and attached to the right side of the workpiece, so that the two hobs 9 are clamped on both sides of the workpiece to apply force; at this time, the baffle 485 will squeeze the spring 486;

[0044] By controlling the second motor 36 on the driving box 32, one of the first shafts 33 is driven to rotate with the help of the first bearing 5, and the three first shafts 33 are driven to rotate in the same direction with the help of the transmission of the gear 34 and the chain 35, so as to drive the multiple hobs 9 on the driving box 32 to rotate synchronously; through the rotation of the hob 9, the workpiece is driven to rotate in the opposite direction with the help of the first motor 24 on the frame 23, or the first motor 24 is controlled to drive the workpiece to rotate in the opposite direction, and at the same time, the hob 9 on the telescopic frame 481 is driven to rotate on the second bearing 6 with the help of the second shaft 482, and rotate in the same direction as the hob 9 on the driving box 32, so as to cooperate with the force to perform gear hobbing;

[0045] After processing, the second hydraulic cylinder 46 is controlled to reset, and the telescopic frame 481 is reset and moved on the position adjustment frame 42 by the force of the spring 486, and is contacted and limited with the position adjustment frame 42 by the stopper 484 in the docking unit 48, so that the second hydraulic cylinder 46 can be located in the telescopic frame 481 and move up and down in a fully retracted state;

[0046] During processing, the first hydraulic cylinder 38 and the second hydraulic cylinder 46 can be controlled to synchronously adjust the drive box 32 and the adjustment frame 42 on the first base 31 and the second base 41 respectively, and the first flip arm 7 and the second flip arm 8 can be used to flip the same angle to adjust the angle of the hob 9 relative to the workpiece, which is convenient for helical gear processing.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gear hobbing device for gearbox production, characterized in that: The invention comprises a base (1), a fixing structure (2), a rolling structure (3) and a biting structure (4), wherein the base (1) is rectangular, the fixing structure (2) is fixedly arranged on the upper wall of the base (1) near the right end and is located in front of the center line, the rolling structure (3) is fixedly arranged on the upper wall of the right end of the base (1) and is located behind the fixing structure (2), and the biting structure (4) is fixedly arranged on the upper wall of the left end of the base (1) and is located on the left side of the rolling structure (3) and corresponds to the rolling structure (3); The fixing structure (2) comprises a cross-shaped slide rail (21), a first slide rail (22), a frame (23), a first motor (24), a second slide rail (25), and a pair of clamping claws (26); The cross-shaped slide rail (21) is fixedly arranged on the upper wall of the base (1) and close to the right end; the first slide rail (22) is vertically arranged on the cross-shaped slide rail (21), and the first slide rail (22) can move forward and backward and left and right through the cross-shaped slide rail (21); the frame (23) is fixedly arranged on the first slide rail (22), and the frame (23) can be lifted and moved through the first slide rail (22); the first motor (24) is fixedly arranged in the frame (23), and the driving end of the first motor (24) is movable and penetrates the middle of the rear side wall of the frame (23); the second slide rail (25) is fixedly arranged on the driving end of the first motor (24), and the second slide rail (25) can be rotated by the first motor (24); the pair of clamping jaws (26) are both convex structures, one end of the pair of clamping jaws (26) is symmetrically arranged on the second slide rail (25), and the pair of clamping jaws (26) can move toward each other through the second slide rail (25); The rolling structure (3) comprises a first base (31), a drive box (32), three first shafts (33), three gears (34), a chain (35), a second motor (36), three first nuts (37) and a first hydraulic cylinder (38); The first base (31) is convex, one end of the first base (31) is fixedly arranged on the upper wall of the rear end of the base (1) and close to the right end, the drive box (32) is a rectangular box, and the lower wall is symmetrically provided with a first flip arm (7), the drive box (32) is movably arranged on the first base (31) through the first flip arm (7), three first bearings (5) are equidistantly arranged in the middle of the front side wall of the drive box (32), one end of the three first shaft rods (33) are respectively fixed and penetrate the middle of the first bearing (5), three gears (34) are respectively fixedly sleeved on one end of the first shaft rod (33) and are located in the drive box (32), and the chain (35) is divided into The second motor (36) is fixedly mounted on the rear side wall of the top end of the driving end, and the driving end of the second motor (36) is movably connected to the rear side wall of the driving box (32). The driving end of the second motor (36) is connected to one end of one of the first shaft rods (33). The three first nuts (37) are detachably connected to the other end of the first shaft rod (33). One end of the first hydraulic cylinder (38) is movably arranged on the upper wall of the base (1) and is located at the rear side of the driving box (32). The other end of the first hydraulic cylinder (38) is tilted and movably connected to the right side wall of the driving box (32). The biting structure (4) comprises a second base (41), a position adjustment frame (42), a third motor (43), a screw rod (44), a moving platform (45), a second hydraulic cylinder (46), a third hydraulic cylinder (47) and three sets of docking units (48); The second base (41) is a T-shaped structure. One end of the second base (41) is fixedly arranged on the upper wall of the base (1) and is close to the left end and corresponds to the first base (31). The positioning frame (42) is a convex structure. The width of the right side wall is smaller than the width of the left side wall. A pair of second flip arms (8) are arranged at the bottom end of the positioning frame (42). The positioning frame (42) is movably arranged on the second base (41) through the second flip arms (8). The left side wall of the positioning frame (42) is provided with a plurality of telescopic openings at equal intervals. The telescopic openings are respectively located at the front and rear sides of the right side wall of the positioning frame (42). The telescopic openings respectively correspond to the first shaft rod (33). A lifting slot is arranged in the middle of the right side wall of the positioning frame (42). The third motor (43) is fixedly arranged on the upper wall of the positioning frame (42). The driving end movably penetrates the upper wall of the lifting groove, one end of the screw rod (44) is fixedly connected to the driving end of the third motor (43), and the other end is movably embedded in the lower wall of the lifting groove, one end of the moving platform (45) is movably inserted in the lifting groove and is screwed to the screw rod (44), one end of the second hydraulic cylinder (46) is fixedly arranged in the other end of the moving platform (45), the third hydraulic cylinder (47) is the same as the first hydraulic cylinder (38), one end of the third hydraulic cylinder (47) is movably arranged on the upper wall of the base (1) and is located on the left side of the second base (41), the telescopic end of the third hydraulic cylinder (47) is obliquely connected to the position adjustment frame (42) and corresponds to the first hydraulic cylinder (38), and the three groups of docking units (48) are respectively detachably arranged on the position adjustment frame (42); By driving the second motor (36), the screw rod (44) can be driven to rotate, thereby causing the movable platform (45) to move up and down, thereby driving the second hydraulic cylinder (46) to move into the telescopic frame (481) of the corresponding hob (9); The docking unit (48) comprises a telescopic frame (481), a second shaft (482), a second nut (483), a pair of stoppers (484), a stop plate (485), and a spring (486); The telescopic frame (481) has two ends that are movably inserted into the telescopic opening of the positioning frame (42), and the telescopic frame (481) can be movably mounted on the second hydraulic cylinder (46). The other end of the telescopic frame (481) is embedded with a second bearing (6) that corresponds to the first bearing (5). One end of the second shaft rod (482) is fixedly inserted into the middle of the second bearing (6) at the other end of the telescopic frame (481) and corresponds to one of the first shaft rods (33). The second shaft rod (482) is connected to the first shaft rod (33). The rod (33) has the same structure, the second nut (483) is detachably screwed to the other end of the second shaft rod (482), a pair of the stoppers (484) are symmetrically arranged on the front and rear side walls of the telescopic frame (481) and close to the middle, the pair of the stoppers (484) can respectively fit with the position adjustment frame (42), the baffle (485) is detachably arranged between the two ends of the telescopic frame (481), and the spring (486) is fixedly arranged between the middle of the baffle (485) and the left side wall of the position adjustment frame (42); Step 1: fix the workpiece by means of the firmware structure (2), select a corresponding roller (9) according to the requirements for processing the workpiece, transport the workpiece forward between the rollers (9), and fit the workpiece onto the left side wall of the corresponding roller (9) in the rolling structure (3); Step 2: According to the selected roller cutter (9), the movable platform (45) in the biting structure (4) is controlled to be raised and lowered so that the second hydraulic cylinder (46) is located in the telescopic frame (481) of the corresponding roller cutter (9); Step 3: Control the second hydraulic cylinder (46) to move the corresponding telescopic frame (481) to the right, so that another corresponding roller (9) on the telescopic frame (481) is attached to the right side of the workpiece, so that the two rollers (9) are clamped on both sides of the workpiece to apply force; Step 4: Finally, the second motor (36) on the driving box (32) is controlled to drive the hob (9) to rotate to perform gear hobbing; Step 5: During processing, the angle of the hob (9) relative to the workpiece can be synchronously adjusted by controlling the first hydraulic cylinder (38) and the second hydraulic cylinder (46).

2. A gear hobbing device for gearbox production according to claim 1, characterized in that: Rolling cutters (9) of different diameters are symmetrically mounted on the first shaft (33) and the second shaft (482).

3. A gear hobbing device for gearbox production according to claim 2, characterized in that: The roller cutters (9) on the telescopic frame (481) can be fitted with the roller cutters (9) on the first shaft rod (33) by means of force applied by the second hydraulic cylinder (46).

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