CN115464214A

CN115464214A - Gear piece gear hobbing system

Info

Publication number: CN115464214A
Application number: CN202211366168.5A
Authority: CN
Inventors: 朱建伟
Original assignee: WUXI YONGKAIDA GEAR CO Ltd
Current assignee: WUXI YONGKAIDA GEAR CO Ltd
Priority date: 2022-01-06
Filing date: 2022-11-01
Publication date: 2022-12-13
Anticipated expiration: 2042-11-01
Also published as: CN115464214B; CN114226870A

Abstract

The invention discloses a gear piece hobbing processing system which comprises a rack, a workpiece clamping table, a cutter rest for mounting a hobbing cutter, a variable-speed toothed belt and a gear pump, wherein the variable-speed toothed belt is driven by a fixed wheel disc and a movable wheel disc; the movable wheel disc is fixedly sleeved on the movable shaft, the movable shaft is fixedly connected with a gear shaft of the gear pump, and the driving gear pump is used for supplying oil to a hydraulic motor for driving the hobbing cutter to rotate.

Description

Gear part hobbing system

Technical Field

The invention relates to the technical field of gear machining, in particular to a gear piece hobbing machining system.

Background

The hobbing gears may be viewed as a backlash free gear and rack drive. When the hobbing cutter rotates for one circle, the rack moves one cutter tooth in the normal direction, and the hobbing cutter continuously transmits the gear as if an infinitely long rack continuously moves. When the hob and the gear hobbing blank are in forced meshing transmission according to the transmission ratio of the gear to the rack strictly, the envelope curves of the hob teeth at a series of positions form the involute tooth profile of a workpiece. With the vertical feeding of the hob, the required involute tooth profile can be rolled out. In order to obtain the involute tooth profile and the gear tooth number, a strict relative motion relationship between the hob and a workpiece must be maintained during gear hobbing. When the hobbing cutter is processed, relative position needs to be matchd between hobbing cutter and the work piece, therefore general gear hobbing equipment can set up the power supply alone for hobbing cutter and work piece, carries out the disconnect-type drive, because the inside error of motor, can not form stable relative motion relation between hobbing cutter and the work piece, and then influences the machining precision of gear hobbing.

Disclosure of Invention

The invention aims to solve the problem that in the prior art, a power source is independently arranged between a hob and a workpiece, and a stable relative motion relation cannot be formed between the hob and the workpiece, and provides a gear hobbing processing system for a gear piece.

In order to achieve the purpose, the invention adopts the following technical scheme:

the gear part hobbing system comprises a rack, wherein the rack is provided with a workpiece clamping table and a cutter rest used for mounting a hobbing cutter, and the workpiece clamping table is rotatably connected with the rack. The tool rest is movably connected with the frame, so that the relative position between the hob and the workpiece can be conveniently adjusted. Preferably, the rack is provided with a vertical oil cylinder for driving the cutter frame to move in the vertical direction and a horizontal oil cylinder for driving the cutter frame to move in the horizontal direction, and the hob can move relative to the workpiece. The tool rest is connected with the rack in a sliding mode in the horizontal direction through the horizontal sliding block, the tool rest is connected with the horizontal sliding block in a sliding mode in the vertical direction through the vertical sliding block, the tool rest is stably connected with the rack, and vibration of the hob when the hob rotates is reduced.

Furthermore, a synchronizing rod is arranged at the bottom of the workpiece clamping table, a driving synchronizing wheel is fixedly sleeved on the synchronizing rod, a driven synchronizing wheel is fixedly sleeved on the fixing shaft, and the driving synchronizing wheel is connected with the driven synchronizing wheel through a synchronizing belt. The end part of the fixed shaft is fixedly connected with a gear shaft of the pressure oil gear pump, the oil inlet end of the pressure oil gear pump is communicated with the cooling liquid tank, the oil outlet end of the pressure oil gear pump is communicated with the cooling liquid pipe, the liquid outlet end of the cooling liquid pipe extends to the upper part of the workpiece clamping table, and liquid tanks for containing cooling liquid are arranged around the workpiece clamping table. The synchronous belt transmits the rotary power of the workpiece clamping table to the fixed shaft, the fixed shaft can drive the oil pressing gear pump to work by rotating, cooling of the workpiece processing part by the cooling liquid is achieved, and power sharing is achieved.

Furthermore, a speed change toothed belt is arranged at the upper end of the fixed shaft, and the speed change toothed belt is supported and rotated through the fixed wheel disc and the movable wheel disc. The adjustable speed gear comprises a fixed wheel disc, an adjustable speed gear belt, an adjustable expansion link, an oil cylinder, a connecting rod, a movable gear and an adjusting piston, wherein the fixed wheel disc and the movable wheel disc are both provided with inner rings supporting the speed gear belt through the adjusting expansion link, the adjusting expansion link comprises the oil cylinder, the connecting rod, the movable gear and the adjusting piston matched with the oil cylinder, one end of the connecting rod is fixedly connected with the adjusting piston, the other end of the connecting rod is fixedly connected with the movable gear, and the movable gear is meshed with the speed gear belt. The rotating speed of the movable wheel disc can be changed by adjusting the extension or the shortening of the telescopic rod.

And an oil cylinder of the adjusting telescopic rod on the fixed wheel disc is communicated with the fixed sleeve to form a fixed oil cavity. And an oil cylinder of the adjusting telescopic rod on the movable wheel disc is communicated with the movable sleeve to form a movable oil cavity. And the fixed piston in the fixed sleeve is connected with the movable piston in the movable sleeve through the adjusting oil cylinder. On the fixed rim plate between and the regulating piston and on the loose wheel dish through synchronous spacing line (being connected, fixed oil pocket and activity oil pocket set up respectively and are used for synchronous spacing line (the supporting seat that turns to, fixed sleeve and movable sleeve's internal diameter are N times of oil drum internal diameter, N is the quantity of adjusting the telescopic link on fixed rim plate or the loose wheel dish, can realize every regulating piston for fixed piston or loose piston synchronous motion, avoids forming because each loose gear pressurized is different and adjusts piston motion stroke different, and all regulation telescopic link length synchronous variation of fixed rim plate or loose wheel dish when keeping the variable speed keeps stable variable speed and power transmission.

When the stroke of the adjusting oil cylinder is unchanged, the fixed piston can drive the movable piston to move, so that the volume of oil in the oil cylinder is changed, the length of the adjusting telescopic rod is changed, and the radius ratio between the fixed wheel disc and the movable wheel disc is changed.

Because the length of the speed-changing toothed belt is fixed, the distance between the fixed wheel disc and the movable wheel disc needs to be adjusted in order to adapt to the length change of the adjusting telescopic rod. The speed-changing toothed belt is provided with a tension sensor, and the adjusting oil cylinder is used for adjusting the distance between the fixed wheel disc and the movable wheel disc according to the target value of the tension sensor so as to keep the effective and stable work of the speed-changing toothed belt. Furthermore, the fixed sleeve is sleeved outside the fixed sleeve and is fixedly connected with the rack. The movable sleeve is sleeved outside the movable sleeve and is in sliding connection with the rack, a synchronous oil cylinder is further arranged between the movable sleeve and the rack, and the synchronous oil cylinder and the adjusting oil cylinder stretch synchronously. The synchronous oil cylinder can stretch out and draw back synchronously along with the adjusting oil cylinder, so that the movable wheel disc can move integrally, and the movable sleeve can keep the movable piston to have no relative movement relative to the fixed piston through synchronous movement in the moving process of the fixed piston.

Further, the frame is provided with a driving assembly for driving the fixed piston to move. Preferably, the driving assembly comprises an adjusting screw rod and an adjusting nut which are matched with each other, the adjusting nut is fixedly connected with the fixed piston, and the adjusting screw rod and the fixed piston are coaxially arranged. The adjusting screw rod is rotatably connected with the rack, the rack is provided with an adjusting motor for driving the adjusting screw rod to rotate, and the adjusting motor can drive the adjusting screw rod to rotate so as to drive the adjusting nut and the fixed piston to move.

Further, the fixed piston is located the inside one end of fixed sleeve and the movable piston is located the inside one end of movable sleeve and sets up vibrating spring respectively, and vibrating spring can produce the vibration behind the fixed piston, and this vibration is used for driving the vibration of the inside hydraulic oil of fixed sleeve or movable sleeve, reduces the viscidity of hydraulic oil to telescopic wall or oil tank, strengthens the mobility of hydraulic oil to in time flow and be full of the appearance chamber that corresponds of hydraulic oil in the oil tank, fixed sleeve or movable sleeve inside.

Furthermore, adjusting nut fixed connection extension rod, the last spacing cardboard that sets up of extension rod, through the spring coupling that exerts pressure between spacing cardboard and the extension rod, the joint face of spacing cardboard is the sawtooth profile. The outer parts of the fixed sleeve and the movable sleeve are respectively provided with a limiting clamping groove matched with the limiting clamping plate, and the limiting clamping grooves are also sawtooth-shaped surfaces. The pressure spring can press the limiting clamping plate on the limiting clamping groove and is used for limiting the displacement of the fixed piston. When adjusting nut drives extension rod and spacing cardboard removal, biasing spring can be compressed, and spacing cardboard can remove along the sawtooth profile of spacing draw-in groove.

The distance between the sawteeth on the sawtooth-shaped surface on the limiting clamping plate is equal to the thread pitch of the adjusting screw rod, and the positions of the sawteeth are staggered with the positions of the threads of the adjusting screw rod, so that the axial movement of the adjusting nut on the adjusting screw rod is avoided, and the stable pressure application of the fixed piston and the movable piston to the hydraulic pressure is kept.

Furthermore, the movable wheel disc is fixedly sleeved on the movable shaft, the movable shaft is fixedly connected with a gear shaft of the driving gear pump, and the driving gear pump and the movable shaft are both in sliding connection with the rack and used for adapting to the position movement of the movable wheel disc. The oil inlet end of drive gear pump is through advancing oil pipe connection hydraulic tank, and the oil end that produces oil of drive gear pump connects the oil inlet of the rotatory hydraulic motor of drive hobbing cutter, and hydraulic motor's the end that produces oil sets up the steady flow valve through a tub connection oil tank that produces oil between the oil end of gear pump and hydraulic motor's the oil inlet for keep hydraulic motor's output stable, be convenient for form the steady rotation of hobbing cutter.

The beneficial effects of the invention are:

1. the hob driving force and the output power of the cooling liquid of the gear part hobbing processing system are both from the rotating force of the workpiece clamping table, the structure is compact, and power sharing is realized; meanwhile, the driving force of the hob comes from power transmission through a synchronous belt, a variable speed toothed belt, a driving gear pump and a hydraulic motor, and a stable power transmission relation can be formed between the workpiece and the hob, so that the forming and processing precision of the gear is kept.

2. The variable speed toothed belt of the gear part hobbing processing system is controlled by hydraulic pressure and a limiting line simultaneously to carry out variable speed adjustment, stable variable speed and power transmission are kept, meanwhile, hydraulic pressing parts are locked through staggered teeth, the stable support performance of the hydraulic pressing parts on hydraulic pressure is kept, then stable transmission ratio between a workpiece and a hobbing cutter is kept, and processing precision is guaranteed.

3. The variable speed toothed belt of the gear hobbing system can form different speed ratios between the hobbing cutter and the workpiece, the applicability of the gear hobbing system is improved, and the hobbing cutter can be selected according to requirements to machine the workpieces with different specifications.

In conclusion, the gear part hobbing processing system has the advantages that a stable power transmission relation can be formed between the workpiece and the hobbing cutter, the forming processing precision of the gear is high, the speed change toothed belt improves the processing applicability of the whole system, meanwhile, the speed change toothed belt can keep stable speed change and power transmission, and meanwhile, the stability of hydraulic pressure and the stability of processing quality are guaranteed.

Drawings

FIG. 1 is a schematic structural view of the present gear piece hobbing system;

FIG. 2 is a schematic structural view of a speed-changing toothed belt of the gear hobbing system;

FIG. 3 is a schematic structural view of the gear piece hobbing system at the position of a fixed wheel disc;

fig. 4 is a schematic structural view of a speed change toothed belt a of the gear hobbing system.

In the figure: 1. a frame; 2. a workpiece clamping table; 3. a coolant tank; 4. a tool holder; 5. hobbing cutters; 6. a hydraulic motor; 7. a synchronization rod; 8. a synchronous belt; 9. a variable speed toothed belt; 10. driving a gear pump; 11. a fixed shaft; 12. a movable shaft; 13. an oil inlet pipe; 14. an oil outlet pipe; 15. a flow stabilizing valve; 16. a coolant tube; 17. a liquid bath; 18. adjusting the lead screw; 19. adjusting the nut; 20. adjusting the oil cylinder; 21. a synchronous oil cylinder; 31. a pressure oil gear pump; 41. a vertical oil cylinder; 42. a vertical slider; 43. a horizontal oil cylinder; 44. a horizontal slider; 81. a driving synchronizing wheel; 82. a passive synchronizing wheel; 91. fixing the wheel disc; 92. a movable wheel disc; 93. adjusting the telescopic rod; 94. a fixed oil cavity; 95. a fixed piston; 96. a movable oil chamber; 97. a movable piston; 98. a vibrating spring; 99. a synchronous limiting line; 191. a limiting clamping plate; 192. an extension rod; 193. a pressure applying spring; 194. a limiting clamping groove; 931. an oil tank; 932. a connecting rod; 933. an adjusting piston; 934. a movable gear; 941. a fixed sleeve; 942. fixing the shaft sleeve; 961. a movable sleeve; 962. a movable shaft sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1, the gear piece hobbing system comprises a frame 1, wherein the frame 1 is provided with a workpiece clamping table 2 and a hob head 4 for mounting a hob 5, and the workpiece clamping table 2 is rotatably connected with the frame 1. The tool rest 4 is movably connected with the frame 1, so that the relative position between the hob 5 and the workpiece can be conveniently adjusted. Further, the rack 1 is provided with a vertical oil cylinder 41 for driving the tool rest 4 to move in the vertical direction and a horizontal oil cylinder 44 for driving the tool rest 4 to move in the horizontal direction, and the hob 5 can move relative to the workpiece. The tool rest 4 is connected with the rack in a sliding mode in the horizontal direction through the horizontal sliding block 43, the tool rest 4 is connected with the horizontal sliding block 44 in a sliding mode in the vertical direction through the vertical sliding block 42, the tool rest 4 is stably connected with the rack, and vibration of the hob 5 during rotation is reduced.

Further, the bottom of the workpiece clamping table 2 is connected with a rotating motor through a synchronizing rod 7, a driving synchronizing wheel 81 is fixedly sleeved on the synchronizing rod 7, a driven synchronizing wheel 82 is fixedly sleeved on the fixed shaft 11, the driving synchronizing wheel 81 and the driven synchronizing wheel 82 are connected through a synchronous belt 8, and the synchronous belt 8 in the embodiment is a toothed belt. The end part of the fixed shaft 11 is fixedly connected with a gear shaft of a pressure oil gear pump 31, the oil inlet end of the pressure oil gear pump 31 is communicated with the cooling liquid tank 3, the oil outlet end of the pressure oil gear pump 31 is communicated with a cooling liquid pipe 16, the liquid outlet end of the cooling liquid pipe 16 extends to the upper part of the workpiece clamping table 2, and a liquid tank 17 for containing cooling liquid is arranged around the workpiece clamping table 2. The synchronous belt 8 transmits the rotary power of the workpiece clamping table to the fixed shaft 11, the fixed shaft 11 rotates to drive the oil pressing gear pump 31 to work, cooling of the machined part of the workpiece by the cooling liquid is achieved, and power sharing is achieved.

Further, the upper end of the fixed shaft 11 is provided with a speed changing toothed belt 9, and referring to fig. 2 and 3, the speed changing toothed belt 9 is supported and rotated by a fixed sheave 91 and a movable sheave 92. Specifically, all support the inner circle of variable speed toothed belt 9 through adjusting telescopic link 93 on fixed wheel disc 91 and the movable wheel disc 92, adjust telescopic link 93 and include an oil section of thick bamboo 931, connecting rod 932, loose gear 934 and with the inside adjusting piston 933 that matches of oil section of thick bamboo 931, the one end fixed connection adjusting piston 933 of connecting rod 932, the other end fixed connection loose gear 934 of connecting rod 932, loose gear 934 is with meshing with variable speed toothed belt 9. The rotation speed of the movable wheel 92 can be changed by adjusting the extension or contraction of the telescopic rod 93.

The oil cylinder 931 of the adjusting telescopic rod 93 on the fixed wheel disc 91 is communicated with the fixed sleeve 941 to form a fixed oil cavity 94. The oil cylinder 931 of the adjusting telescopic rod 93 on the movable wheel disc 92 is communicated with the movable sleeve 961 to form a movable oil chamber 96. The fixed piston 95 inside the fixed sleeve 941 and the movable piston 97 inside the movable sleeve 961 are connected by an adjusting cylinder 20. Adjusting pistons 933 on the fixed wheel disc 91 and adjusting pistons 933 on the movable wheel disc 92 are connected with movable sleeves 961 through synchronous limit lines (99), a fixed oil cavity 94 and a movable oil cavity 96 are respectively provided with a supporting seat for steering the synchronous limit lines (99), the inner diameters of the fixed sleeve 941 and the movable sleeve 961 are N times of the inner diameter of an oil cylinder 931, N is the number of adjusting telescopic rods 93 on the fixed wheel disc 91 or the movable wheel disc 92, so that each adjusting piston 933 can synchronously move relative to the fixed piston 95 or the movable piston 97, the phenomenon that the adjusting pistons 933 are different in moving stroke due to different pressed forces of all movable gears 934 is avoided, the synchronous length changes of all the adjusting telescopic rods 93 of the fixed wheel disc 91 or the movable wheel disc 92 are kept during speed change, and stable speed change and power transmission are kept.

When the stroke of the adjusting cylinder 20 is not changed, the fixed piston 95 can drive the movable piston 97 to move, so as to change the volume of the oil in the oil cylinder 931, further change the length of the adjusting telescopic rod 93, and change the radius ratio between the fixed wheel disc 91 and the movable wheel disc 92.

Since the length of the variable speed toothed belt 9 is fixed, the distance between the fixed wheel disc 91 and the movable wheel disc 92 needs to be adjusted to adapt to the length change of the adjustable telescopic rod 93. The speed-changing toothed belt 9 is provided with a tension sensor, and the adjusting oil cylinder 20 is used for adjusting the distance between the fixed wheel disc 91 and the movable wheel disc 92 according to the target value of the tension sensor so as to keep the effective and stable operation of the speed-changing toothed belt 9. Further, a fixing shaft sleeve 942 is sleeved outside the fixing sleeve 941, and the fixing shaft sleeve 942 is fixedly connected with the rack. The outside of the movable sleeve 961 is sleeved with a movable shaft sleeve 962, the movable shaft sleeve 962 is slidably connected with the rack, a synchronous oil cylinder 21 is further arranged between the movable shaft sleeve 962 and the rack, and the synchronous oil cylinder 21 and the adjusting oil cylinder 20 are synchronously telescopic. The synchronous cylinder 21 can extend and retract synchronously with the adjusting cylinder 20, so that the movable wheel disc 92 can move integrally, and the movable sleeve 961 keeps the movable piston 97 not to move relative to the fixed piston 95 through synchronous movement in the moving process of the fixed piston 95.

Further, the frame 1 is provided with a driving assembly for driving the fixed piston 95 to move. In this embodiment, the driving assembly includes an adjusting screw 18 and an adjusting nut 19 that are matched, the adjusting nut 19 is fixedly connected to the fixed piston 95, and the adjusting screw 18 and the fixed piston 95 are coaxially disposed. The adjusting screw 18 is rotatably connected with the frame 1, the frame is provided with an adjusting motor for driving the adjusting screw 18 to rotate, and the adjusting motor can drive the adjusting screw 18 to rotate so as to drive the adjusting nut 19 and the fixed piston 95 to move.

Further, fixed piston 95 is located the inside one end of fixed sleeve 941 and activity piston 97 is located the inside one end of activity sleeve 961 and sets up vibrating spring 98 respectively, vibrating spring 98 can produce the vibration behind fixed piston 95, this vibration is used for driving the vibration of the inside hydraulic oil of fixed sleeve 941 or activity sleeve 961, reduce the viscidity of hydraulic oil to sleeve wall or oil tank 931, strengthen the mobility of hydraulic oil to be convenient for hydraulic oil in oil tank 931, the inside timely flow of fixed sleeve 941 or activity sleeve 961 and be full of corresponding appearance chamber.

Furthermore, the adjusting nut 19 is fixedly connected with an extending rod 192, referring to fig. 4, a limiting clamping plate 191 is arranged on the extending rod 192, the limiting clamping plate 191 is connected with the extending rod 192 through a pressing spring 193, and a clamping surface of the limiting clamping plate 191 is a sawtooth surface. The outer parts of the fixed sleeve 941 and the movable sleeve 961 are respectively provided with a limiting clamping groove 194 matched with the limiting clamping plate 191, and the limiting clamping groove 194 is also a sawtooth-shaped surface. The pressing spring 193 presses the limit catch plate 191 against the limit catch groove 194 to limit the displacement of the fixed piston 95. When the adjusting nut 19 drives the extension rod 192 and the limiting catch plate 191 to move, the pressing spring 193 can be compressed, and the limiting catch plate 191 can move along the sawtooth-shaped surface of the limiting catch groove 194.

It can be stated that the distance between the saw teeth on the saw-tooth surface of the limiting clamping plate 191 is equal to the thread pitch of the adjusting screw 18, and the positions of the saw teeth are staggered with the position of the thread of the adjusting screw 18, so as to avoid the axial movement of the adjusting nut 19 on the adjusting screw 18, and keep the fixed piston 95 and the movable piston 97 stably applying pressure to the hydraulic pressure.

Further, the fixed cover of activity rim plate 92 is connected in loose axle 12, the gear shaft of loose axle 12 fixed connection drive gear pump 10, the oil feed end of drive gear pump 10 is through advancing oil pipe 13 and connecting hydraulic tank, and the end of producing oil of drive gear pump 10 passes through the oil inlet of hose connection drive hobbing cutter 5 rotatory hydraulic motor 6, and hydraulic motor 6's the end of producing oil is through going out oil pipe 14 and connecting the oil tank, sets up the steady stream valve 15 on the hose for keep hydraulic motor 6's output stable, keep hobbing cutter 5 steady job.

The working process of the gear piece hobbing system in the embodiment comprises the following steps:

the speed ratio adjusting process comprises the following steps: the adjusting motor can drive the adjusting screw 18 to rotate, and then drive the adjusting nut 19 and the fixed piston 95 to move, the fixed piston 95 drives the movable piston 97 to move, the volume of the oil liquid in the oil cylinder 931 is changed, and then the length of the adjusting telescopic rod 93 is changed, so that the radius ratio between the fixed wheel disc 91 and the movable wheel disc 92 is changed. Under the action of the synchronous limiting line (99), the adjusting piston 933 moves synchronously relative to the fixed piston 95 or the movable piston 97, and the lengths of all the adjusting telescopic rods 93 of the fixed wheel disc 91 or the movable wheel disc 92 change synchronously during speed change, so that stable speed change is realized.

Meanwhile, the adjusting cylinder 20 adjusts the distance between the fixed wheel disc 91 and the movable wheel disc 92 according to the target value of the tension sensor on the speed-changing toothed belt 9, so as to keep the speed-changing toothed belt 9 to work effectively and stably, the synchronous cylinder 21 extends and retracts synchronously along with the adjusting cylinder 20, so that the movable wheel disc 92 can move integrally, and the movable sleeve 961 keeps the movable piston 97 not to move relative to the fixed piston 95 through synchronous movement in the moving process of the fixed piston 95.

In the process, the adjusting nut 19 drives the extension rod 192 and the limiting clamping plate 191 to move, the pressure applying spring 193 is compressed, and the limiting clamping plate 191 can move along the sawtooth-shaped surface of the limiting clamping groove 194; after the speed change is finished, the sawteeth of the limiting clamping plate 191 are clamped into the sawteeth surfaces of the limiting clamping grooves 194, the sawteeth of the limiting clamping plate 191 are staggered with the thread positions of the adjusting screw 18, the adjusting nut 19 does not axially float on the adjusting screw 18, the fixed piston 95 and the movable piston 97 are kept to stably apply pressure to hydraulic pressure, and the stable transmission ratio between the workpiece and the hob is kept.

(II) processing: the workpiece to be processed is installed on the workpiece clamping table 2, the rotating motor is started, the rotating motor drives the synchronizing rod 7 to rotate, the synchronizing rod 7 drives the fixing shaft 11 to rotate through the synchronous belt 8, the fixing shaft 11 rotates to drive the oil pressing gear pump 31 to work, cooling of the workpiece processing part by cooling liquid is achieved, meanwhile, the fixing wheel disc 91 on the fixing shaft 11 rotates, the fixing wheel disc 91 drives the movable wheel disc 92 to rotate through the variable speed gear belt 9, the movable shaft 12 is driven to rotate, the movable shaft 12 drives the driving gear pump 10 to work, the driving gear pump 10 supplies oil to the hydraulic motor 6, and the hydraulic motor 6 drives the hob 5 to rotate. And adjusting the vertical oil cylinder 41 and the horizontal oil cylinder 44 to enable the hob 5 to perform gear hobbing on the workpiece.

The workpiece and the hob of the gear part hobbing processing system in the embodiment can form a stable power transmission relation, the forming processing precision of the gear is high, the speed change toothed belt increases the processing applicability of the whole system, stable speed change and power transmission can be kept, meanwhile, the stability of hydraulic pressure is ensured, and the processing quality of the whole system is stable.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The gear piece hobbing machining system comprises a rack (1), a workpiece clamping table (2) rotatably connected with the rack (1), and a cutter rest (4) movably connected with the rack and used for mounting a hobbing cutter (5), and is characterized by further comprising a speed change toothed belt (9) and a gear pump (10), wherein the speed change toothed belt (9) is driven by a fixed wheel disc (91) and a movable wheel disc (92), the fixed wheel disc (91) and the movable wheel disc (92) are both provided with inner rings of the speed change toothed belt (9) through an adjusting telescopic rod (93) for supporting, the adjusting telescopic rod (93) comprises an oil cylinder (931), a connecting rod (932), a movable gear (934) meshed with the speed change toothed belt (9) and an adjusting piston (933) matched with the inside of the oil cylinder (931), one end of the connecting rod (932) is fixedly connected with the adjusting piston (933), and the other end of the connecting rod (932) is fixedly connected with the movable gear (934);

an oil cylinder (931) of an adjusting telescopic rod (93) on the fixed wheel disc (91) is communicated with a fixed sleeve (941), an oil cylinder (931) of the adjusting telescopic rod (93) on the movable wheel disc (92) is communicated with a movable sleeve (961), and a fixed piston (95) inside the fixed sleeve (941) is connected with a movable piston (97) inside the movable sleeve (961) through an adjusting oil cylinder (20);

the adjusting piston (933) on the fixed wheel disc (91) is connected with the fixed piston (95) and the adjusting piston (933) on the movable wheel disc (92) is connected with the movable sleeve (961) through a synchronous limiting line (99), the inner diameters of the fixed sleeve (941) and the movable sleeve (961) are N times of the inner diameter of the oil cylinder (931), and N is the number of the adjusting telescopic rods (93) on the fixed wheel disc (91) or the movable wheel disc (92);

the frame (1) is provided with a driving component for driving the fixed piston (95) to move;

the fixed wheel disc (91) is fixedly sleeved on a fixed shaft (11), the fixed shaft (11) is connected with a synchronous rod (7) through a synchronous belt (8), and the synchronous rod (7) is coaxially and fixedly connected to the bottom of the workpiece clamping table (2); the movable wheel disc (92) is fixedly sleeved on the movable shaft (12), the movable shaft (12) is fixedly connected with a gear shaft of the drive gear pump (10), and an oil outlet end of the drive gear pump (10) is connected with an oil inlet of a hydraulic motor (6) for driving the hob (5) to rotate.

2. The gear piece hobbing system of claim 1, wherein the drive assembly comprises a matching adjustment screw (18) and adjustment nut (19), the adjustment nut (19) being fixedly connected to a fixed piston (95), the adjustment screw (18) being coaxially disposed with the fixed piston (95).

3. The gear piece hobbing system according to claim 2, wherein the adjusting nut (19) is fixedly connected with an extension rod (192), a limiting clamping plate (191) is arranged on the extension rod (192), the limiting clamping plate (191) is connected with the extension rod (192) through a pressing spring (193), and a clamping surface of the limiting clamping plate (191) is a sawtooth surface;

the outside of fixed sleeve (941) and activity sleeve (961) sets up spacing draw-in groove (194) that match with spacing cardboard (191) respectively.

4. The gear piece hobbing system of claim 3, wherein the distance between the serrations on the serrated face on the stop plate (191) is equal to the pitch of the adjustment screw (18), and the position of the serrations is offset from the position of the thread of the adjustment screw (18).

5. The gear piece hobbing system according to claim 1 or 4, wherein a vibration spring (98) is provided at one end of the fixed piston (95) inside the fixed sleeve (941) and at one end of the movable piston (97) inside the movable sleeve (961), respectively.

6. The gear piece hobbing system according to claim 5, wherein the end of the fixed shaft (11) is fixedly connected with a gear shaft of an oil pressing gear pump (31), the oil inlet end of the oil pressing gear pump (31) is communicated with the cooling liquid tank (3), the oil outlet end of the oil pressing gear pump (31) is communicated with the cooling liquid pipe (16), and the liquid outlet end of the cooling liquid pipe (16) extends above the workpiece clamping table (2).

7. The gear piece hobbing system according to claim 6, wherein a fixed boss (942) is sleeved outside the fixed sleeve (941), and the fixed boss (942) is fixedly connected with a rack; the movable sleeve (962) is sleeved outside the movable sleeve (961), the movable sleeve (962) is connected with the rack through a synchronous oil cylinder (21), and the synchronous oil cylinder (21) and the adjusting oil cylinder (20) stretch out and draw back synchronously.

8. The gear piece hobbing system according to claim 7, wherein the rack (1) is provided with a vertical oil cylinder (41) for driving the tool rest (4) to move in the vertical direction and a horizontal oil cylinder (44) for driving the tool rest (4) to move in the horizontal direction, the tool rest (4) is connected with the rack in the horizontal direction through a horizontal sliding block (43), and the tool rest (4) is connected with the horizontal sliding block (44) in the vertical direction through a vertical sliding block (42).