Gear forging production line

Abstract

The utility model relates to a gear forging production line which comprises a sawing machine used for cutting a long cylindrical blank into a short cylindrical blank; the before-entering-furnace conveying belt equipment is used for conveying the short cylindrical blanks to the next working procedure; the heating furnace is used for heating the fed short cylindrical blank to the temperature required by forging and pressing; the forging and pressing equipment is used for forging and pressing the heated short cylindrical blank to form a gear product; the cooling equipment is used for cooling the gear product formed by forging and pressing; the before-furnace-entering mechanical arm is used for transferring the short cylindrical blanks on the before-furnace-entering conveying belt equipment to the input end of the heating furnace; the mechanical arm before forging and pressing is used for transferring the heated blank to the input end of the forging and pressing equipment; the after-forging mechanical arm is used for transferring a product formed by forging to the input end of the cooling equipment from the output end of the forging equipment; the device has the advantages that the mechanical arms are arranged among the working procedures to replace part of manpower, so that the labor intensity is reduced, and the harm of occupational diseases such as high temperature, noise and dust is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to transmission component manufacturing field especially relates to a gear forging production line. BACKGROUND

[0002] With the further development of industrial transfer and the development of high-end equipment manufacturing industry in China, some domestic forging enterprises have made great progress in forging technology process, forging equipment level and forging capacity by absorbing introduced technology, strengthening research and development cooperation and technical accumulation.

[0003] But the current gear forging production line still has the following defects:

[0004] 1. The forging production of gear generally includes five processes of blank preparation (adopting sawing machine to cut long cylindrical blank into short cylindrical), blank heating (heating temperature is usually between 1000 DEG C-1250 DEG C), forging, cooling, most of the forging production line is still in the artificial production stage, only part of the equipment of the production line enters the automatic production stage, in the artificial forging production process, the carrying of materials between equipment is completed by artificial, this operation mode is flexible, but the labor intensity of workers is great, and faces the occupational hazards such as high temperature, noise, dust and the like;

[0005] 2. The heating of gear before forging is usually carried out in a heating furnace, as described in patent 201821376496.2, but this process needs to wait for a long time from normal temperature to set temperature;

[0006] 3. The forging and pressing includes upsetting, preforming (adding or deleting according to process needs), final forging and forming, three processes need to be completed in three stations, and the temperature maintenance is a very key factor, if the blank appears obvious temperature drop in the station transfer process, needs to be reheated in a heating furnace, so an additional heating furnace and holding furnace are configured near the forging equipment, in addition, the forging pressure is different for different material forging, at present, a fixed type oil pump is adopted to push the hydraulic cylinder to carry out forging, the upper limit of forging pressure is difficult to change, and the order of a small amount of high-pressure forging requirement cannot be satisfied in time;

[0007] 4. The cooling of gear after forging is usually carried out by natural cooling or medium (water, oil or other medium) cooling in the workshop, the natural cooling is simple and easy to operate, but the cooling speed is slow, and workers, especially non-workshop production personnel, shuttle in the workshop, the gear after high-temperature forging (generally about 1000 DEG C) becomes a very big danger source, and the control of cooling speed is very important for medium cooling, needs to be operated by experienced workers, and the labor cost is high.

[0008] Based on this, the case is proposed. The utility model discloses a kind of gear forging production lines, to solve the above-mentioned defects.

[0009] The utility model discloses a kind of gear forging production lines, to solve the above-mentioned defects.

[0010] To achieve the above object, the technical scheme of the utility model is as follows:

[0011] A kind of gear forging production line, comprising:

[0012] Sawing machine is used to cut long cylindrical blank into short cylindrical blank;

[0013] Furnace entry before conveyor belt equipment is used to deliver short cylindrical blank to next working procedure;

[0014] Heating furnace is used to send short cylindrical blank to forging and pressing required temperature;

[0015] Forging and pressing equipment is used to forge and press short cylindrical blank after heating, and form gear product;

[0016] Cooling equipment is used to cool handle gear product formed by forging and pressing;

[0017] Further comprising:

[0018] Mechanical arm before furnace entry is used to transfer short cylindrical blank of furnace entry before conveyor belt equipment output side to heating furnace input end;

[0019] Mechanical arm before forging and pressing is used to transfer short cylindrical blank after heating to the input end of forging and pressing equipment;

[0020] Mechanical arm after forging and pressing is used to transfer gear product formed by forging and pressing from the output end of forging and pressing equipment to the input end of cooling equipment.

[0021] Further, the furnace entry before conveyor belt equipment includes support one, support two and preheating conveyor belt, both ends of the preheating conveyor belt are fixed on support one and support two, heating module is provided above the preheating conveyor belt, and the heating module is used to preheat short cylindrical blank on the preheating conveyor belt;

[0022] The heating module adopts infrared heating module.

[0023] Further, the furnace entry before conveyor belt equipment includes fixed seat one, fixed seat two and preheating hydraulic cylinder, the fixed seat one is below support one, and support one is hinged with the fixed seat one, the preheating hydraulic cylinder is below support two, the fixed seat two is below the preheating hydraulic cylinder, the piston rod end of the preheating hydraulic cylinder is hinged with support two, and the cylinder body end of the preheating hydraulic cylinder is hinged with the fixed seat two;

[0024] The preheating conveyor belt is a conveyor belt with transverse partition plate;

[0025] The preheating conveying belt is provided with a heat preservation fence;

[0026] The belt surface, transverse partition plate and inner wall of the heat preservation fence of the preheating conveying belt are all covered with a reflective layer.

[0027] Further, the forging equipment comprises a pre-forging conveying belt, a pre-upsetting mechanical arm, an upsetting forging press, a pre-forming mechanical arm, a pre-forming forging press, a final-forging mechanical arm, a final-forging forging press, a post-forging mechanical arm and a post-forging conveying belt;

[0028] The pre-forging mechanical arm is used for transferring the heated short cylindrical blank to the pre-forging conveying belt, the pre-upsetting mechanical arm is used for transferring the short cylindrical blank on the pre-forging conveying belt to the upsetting forging press for upsetting, the pre-forming mechanical arm is used for transferring the blank after upsetting to the pre-forming forging press for pre-forming, the final-forging mechanical arm is used for transferring the blank after pre-forming to the final-forging forging press, the post-forging mechanical arm is used for transferring the gear product after final-forging forming to the post-forging conveying belt, and the post-forging mechanical arm is used for transferring the gear product on the post-forging conveying belt to the input end of the cooling equipment.

[0029] Further, the upsetting forging press, the pre-forming forging press and the final-forging forging press each comprise a rack, a forging hydraulic cylinder mounted on the rack, a moving die mounted on the piston rod end of the forging hydraulic cylinder, and a stationary die mounted on the rack and located directly below the moving die.

[0030] The base and side wall of the stationary die are embedded with resistance heating modules, and a heat preservation plate is mounted on the outer periphery of the rack of the stationary die.

[0031] Further, the forging equipment comprises a heat preservation chamber, the longitudinal front end of the heat preservation chamber is provided with an input port only for the pre-forging conveying belt to enter, the longitudinal rear end of the heat preservation chamber is provided with an output port only for the post-forging conveying belt to enter, and the outer periphery of the part of the heat preservation chamber outside the pre-forging conveying belt is provided with a heat preservation fence.

[0032] Further, the forging equipment comprises a hydraulic control system, which comprises a total oil tank, an upsetting oil pump, a pre-forming oil pump, a final-forging oil pump, an upsetting filter, a pre-forming filter, a final-forging filter, an upsetting electromagnetic reversing valve, a pre-forming electromagnetic reversing valve and a final-forging electromagnetic reversing valve.

[0033] The forging hydraulic cylinder is defined as an upsetting hydraulic cylinder, a pre-forming hydraulic cylinder and a final-forging hydraulic cylinder according to the upsetting, pre-forming and final-forging processes, respectively.

[0034] The total oil tank, the upsetting oil pump, the upsetting filter, the upsetting electromagnetic reversing valve and the upsetting hydraulic cylinder are connected by an oil pipe A.

[0035] The total oil tank is connected with the preforming oil pump, the preforming oil pump is connected with the preforming filter, the preforming filter is connected with the preforming electromagnetic reversing valve, and the preforming electromagnetic reversing valve is connected with the preforming hydraulic cylinder through the oil pipe B;

[0036] The total oil tank is connected with the final forging oil pump, the final forging oil pump is connected with the final forging filter, the final forging filter is connected with the final forging electromagnetic reversing valve, and the final forging electromagnetic reversing valve is connected with the final forging hydraulic cylinder through the oil pipe C;

[0037] The oil pipe A between the upsetting electromagnetic reversing valve and the upsetting hydraulic cylinder includes the oil pipe 1A connected with the upper inlet of the hydraulic cylinder and the oil pipe 2A connected with the lower inlet of the hydraulic cylinder; the oil pipe B between the preforming electromagnetic reversing valve and the preforming hydraulic cylinder includes the oil pipe 1B connected with the upper inlet of the hydraulic cylinder and the oil pipe 2B connected with the lower inlet of the hydraulic cylinder; the oil pipe C between the final forging electromagnetic reversing valve and the final forging hydraulic cylinder includes the oil pipe 1C connected with the upper inlet of the hydraulic cylinder and the oil pipe 2C connected with the lower inlet of the hydraulic cylinder;

[0038] The communication pipe is arranged between the oil pipe 1A and the oil pipe 1B, and the electric butterfly valve AB1 is arranged on the communication pipe; the communication pipe is arranged between the oil pipe 2A and the oil pipe 2B, and the electric butterfly valve AB2 is arranged on the communication pipe; the communication pipe is arranged between the oil pipe 1C and the oil pipe 1B, and the electric butterfly valve CB1 is arranged on the communication pipe; the communication pipe is arranged between the oil pipe 2C and the oil pipe 2B, and the electric butterfly valve CB2 is arranged on the communication pipe; the connection point of the communication pipe and the oil pipe B is arranged on the side close to the preforming electromagnetic reversing valve; the electric butterfly valve BB is arranged on the oil pipe 1B and the oil pipe 2B, and is arranged on the side close to the preforming hydraulic cylinder;

[0039] The overflow valve is arranged on the oil pipe A, the oil pipe B and the oil pipe C.

[0040] Further, the cooling device includes a front section, a middle section and a rear section of the tank;

[0041] The front section of the tank includes a horizontal straight line type conveying belt and a cooling fan arranged above the conveying belt, the conveying belt adopts a metal mesh belt surface with a partition, and a suction duct connected with a suction fan is arranged below the conveying belt;

[0042] The rear section of the tank includes a horizontal straight line type conveying belt and a drying fan arranged above the conveying belt, the conveying belt adopts a metal mesh belt surface with a partition, and a liquid receiving groove connected with a liquid discharge pipe is arranged below the conveying belt;

[0043] The middle section of the groove comprises a plurality of straightly arranged cooling grooves, which are filled with liquid cooling medium, and the temperature of the cooling medium in different cooling grooves gradually decreases from the front section to the rear section of the groove, and a zigzag conveying belt is arranged in the cooling grooves, which comprises a downward inclined section connected with the conveying belt in the front section or the previous cooling groove, a horizontal straight section immersed in the cooling medium, and an upward inclined section connected with the conveying belt in the next cooling groove or the rear section of the groove; and the conveying belt in the middle section of the groove is provided with a metal mesh belt surface with partitions.

[0044] Further, a brush is arranged in the cooling groove to contact the lower conveying belt.

[0045] Further, the cooling groove comprises a groove body, a temperature sensor, a liquid outlet, a liquid inlet, and valves arranged on the liquid outlet and the liquid inlet.

[0046] The utility model has the advantages of:

[0047] 1. The mechanical arm is arranged between each process to replace part of the manual work, reduce the labor intensity, and reduce the occupational hazards such as high temperature, noise, and dust;

[0048] 2. The heating module is arranged on the conveying belt before the furnace to uniformly preheat the blank before entering the furnace, thereby reducing the heating time in the heating furnace; and for some materials, rapid heating may cause a too large temperature gradient between the surface and the core, which is easy to cause cracking; through preheating, the temperature difference between the blank and the high-temperature furnace is reduced, so that the blank can be uniformly heated after entering the high-temperature furnace, thereby reducing the thermal stress caused by the temperature difference between the inside and the outside;

[0049] 3. The three forging presses correspond to the upsetting, preforming, and final forging processes respectively, and the heating module is arranged in the forging equipment to realize heating and heat preservation during forging, reduce the heat loss of the blank in the die, ensure the smooth progress of the forging process and the quality and performance of the final product; the hydraulic systems of the three forging presses are independent and are combined through the communication pipe and the electric butterfly valve, allowing to share the hydraulic pressure under certain conditions (for example, when the pressure is not enough during upsetting or final forging), increasing the flexibility of the hydraulic system; in addition, the arrangement of multiple overflow valves also ensures the safety of the system and prevents damage caused by overpressure;

[0050] 4. The cooling equipment reduces the dependence on manual experience through the conveying system and the staged cooling mechanism, effectively prevents the product from being damaged due to rapid temperature change, and ensures the product quality; the air-cooled pre-cooling in the front section of the groove prepares for the subsequent cooling; the multi-stage cooling groove in the middle section of the groove ensures that the product can be smoothly reduced from high temperature to the required low temperature state; and the air-drying treatment in the rear section of the groove ensures the dryness of the final product, which is suitable for subsequent processing or storage. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 Fig. 2 is a plan view showing the layout of a gear forging production line according to an embodiment of the present application;

[0052] Figure 2 Fig. 3 is a schematic view showing the configuration of a pre- furnace conveyer device according to an embodiment of the present application;

[0053] Figure 3 Fig. 4 is a schematic view showing the configuration of a pre- furnace conveyer device according to an embodiment of the present application; Figure 2 Fig. 5 is a schematic view showing the configuration of a pre- furnace conveyer device according to an embodiment of the present application;

[0054] Figure 4 Fig. 6 is a schematic view showing the configuration of a pre- furnace conveyer device according to an embodiment of the present application; Figure 2 Fig. 7 is a schematic view showing the configuration of a pre- furnace conveyer device according to an embodiment of the present application;

[0055] Figure 5 Fig. 8 is a schematic view showing the configuration of a forging press device according to an embodiment of the present application;

[0056] Figure 6 Fig. 9 is a schematic view showing the configuration of a forging press device according to an embodiment of the present application; Figure 5 Fig. 10 is a schematic view showing the configuration of a forging press device according to an embodiment of the present application;

[0057] Figure 7 Fig. 11 is a schematic view showing the configuration of a forging press device according to an embodiment of the present application; Figure 5

[0058] Fig. 12 is a schematic view showing the configuration of a cooling device according to an embodiment of the present application; Figure 8

[0059] Fig. 13 is a schematic view showing the configuration of a cooling device according to an embodiment of the present application; Figure 9 Figure 8 Fig. 14 is a schematic view showing the configuration of a cooling device according to an embodiment of the present application;

[0060] Figure 10 Figure 8 Fig. 15 is a schematic view showing the configuration of a cooling device according to an embodiment of the present application;

[0061] Figure 11 Fig. 16 is a schematic view showing the configuration of a cooling device according to an embodiment of the present application; Figure 8

[0062] Fig. 17 is a schematic view showing the configuration of a cooling device according to an embodiment of the present application; Figure 12 Figure 8 Fig. 18 is a schematic view showing the configuration of a cooling device according to an embodiment of the present application;

[0063] Figure 13 Figure 8 Fig. 19 is a schematic view showing the configuration of a cooling device according to an embodiment of the present application;

[0064] BRIEF DESCRIPTION OF THE DRAWINGS

[0065] 1. Sawing machine

[0066] ​​​​2, before entering the furnace conveyor belt equipment; 201, fixed seat one; 202, fixed seat two; 203, pedestal one; 204, pedestal two; 205, preheating conveyor belt; 206, infrared heating module; 207, preheating hydraulic cylinder; 208, heat retaining fence;

[0067] 3, before entering the furnace mechanical arm; 4, heating furnace; 5, before forging mechanical arm;

[0068] 6, forging equipment; 601, before entering the furnace conveyor belt; 602, before entering the mechanical arm; 603, upsetting forging press; 604, before entering the mechanical arm; 605, preforming forging press; 606, before entering the mechanical arm; 607, final forging forging press; 608, after entering the mechanical arm; 609, after entering the furnace conveyor belt; 610, upsetting hydraulic cylinder; 611, preforming hydraulic cylinder; 612, final forging hydraulic cylinder; 613, rack; 614, moving die; 615, fixed die; 616, resistance heating module; 617, heat retaining plate; 618, heat retaining chamber; 619, heat retaining fence; 620, total oil tank; 621, upsetting oil pump; 622, preforming oil pump; 623, final forging oil pump; 624, upsetting filter; 625, preforming filter; 626, final forging filter; 627, upsetting electromagnetic directional valve; 628, preforming electromagnetic directional valve; 629, final forging electromagnetic directional valve; 630, overflow valve;

[0069] 7, after entering the mechanical arm;

[0070] 8, cooling equipment; 801, horizontal straight line type conveyor belt; 802, cooling fan; 803, air suction pipeline; 804, air drying fan; 805, liquid receiving groove; 806, cooling tank; 807, broken line type conveyor belt; 808, brush; 809, temperature sensor; 810, liquid discharge port; 811, liquid inlet;

[0071] 9, blank. DETAILED DESCRIPTION

[0072] The utility model will be described in further detail below in combination with examples, and it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like in the text is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0073] The embodiment proposes a gear forging production line, such as Figure 1As shown, the forging process in sequence includes sawing machine 1, pre-furnace conveying belt equipment 2, pre-furnace mechanical arm 3, heating furnace 4, pre-forging mechanical arm 5, forging equipment 6, post-forging mechanical arm 7 and cooling equipment 8.

[0074] Sawing machine 1 is used to cut long cylindrical blank into short cylindrical blank, the short cylindrical blank output by sawing machine 1 is in normal temperature state, no mechanical arm is provided here, the output short cylindrical blank is arranged by manual, and the blanks are placed one by one to pre-furnace conveying belt equipment 2.

[0075] As shown in the figure, Figure 2 As shown, the pre-furnace conveying belt equipment 2 includes support one 203, support two 204 and preheating conveying belt 205, the seat bodies at both ends of the preheating conveying belt 205 are fixed on the support one 203 and the support two 204, and a heating module 206 is arranged above the preheating conveying belt 205, the heating module 206 is used for preheating the short cylindrical blank on the preheating conveying belt 205. Blank preheating can reduce the heating time in the heating furnace 4, and for some materials, rapid heating can cause too large temperature gradient between the surface and the core, which is easy to cause cracking, by preheating, the temperature difference between the blank and the high-temperature furnace can be reduced, so that the blank can be heated more uniformly after entering the high-temperature furnace, thereby reducing the thermal stress caused by the temperature difference between the inside and the outside.

[0076] But preheating also needs to ensure the uniformity of the blank heating, Figure 2 The heating module 206 is arranged above the conveying belt, if the blank is not turned over, it will cause uneven preheating, in view of this defect, the structure is improved in the application. The heating module 206 for preheating adopts an infrared heating module, the infrared heating module 206 is used for directly heating the blank by infrared radiation. Of course, electromagnetic induction heating or resistance heating or nozzle type flame heating and the like can also be used. The improved structure for uniform preheating is carried out for the infrared heating module 206, which is specifically described as follows.

[0077] The pre-furnace conveying belt equipment 2 further includes fixed seat one 201, fixed seat two 202 and preheating hydraulic cylinder 207, the fixed seat one 201 is located below the support one 203, and the support one 203 is hinged to the fixed seat one 201, the preheating hydraulic cylinder 207 is located below the support two 204, the fixed seat two 202 is located below the preheating hydraulic cylinder 207, the piston rod end of the preheating hydraulic cylinder 207 is hinged to the support two 204, and the cylinder body end of the preheating hydraulic cylinder 207 is hinged to the fixed seat two 202. The preheating conveying belt 205 is a conveying belt with a transverse partition plate, the preheating conveying belt 205 is externally provided with a heat preservation fence 208, and the belt surface, the transverse partition plate and the inner wall of the heat preservation fence 208 all have a reflective layer. Figure 3 and Figure 4As shown, by lifting the preheating hydraulic cylinder 207, the preheating conveyor belt 205 can be tilted upward or downward, so that the short cylindrical billets on the preheating conveyor belt 205 rotate back and forth between two adjacent cross partitions, thereby achieving uniform heating. The design of the heat preservation fence 208 reduces the loss of radiant heat, and the design of the reflective layer further improves the utilization rate of radiant heat. The design of the cross partition allows only one short cylindrical billet to be placed between two adjacent cross partitions during use, and the short cylindrical billet can only roll back and forth within a small distance between the two cross partitions. In addition, the lifting frequency of the preheating hydraulic cylinder 207 can be adjusted according to actual needs to avoid excessively fast or slow lifting frequency.

[0078] The pre-furnace mechanical arm 3 is used to transfer the short cylindrical billets on the output side of the pre-furnace conveyor belt device 2 to the input end of the heating furnace 4. The heating furnace 4 is used to heat the short cylindrical billets sent in to the required temperature for forging and pressing. The heating furnace 4 can adopt the structure of the heating furnace described in patent 201821376496.2, which facilitates the entry and exit of the billets and can cooperate well with the mechanical arm. The pre-forging mechanical arm 5 is used to transfer the heated short cylindrical billets to the input end of the forging equipment 6.

[0079] As shown in Figure 5 The forging equipment 6 includes a pre-forging conveyor belt 601, a pre-upsetting mechanical arm 602, an upsetting forging press 603, a pre-forming mechanical arm 604, a pre-forming forging press 605, a final forging mechanical arm 606, a final forging forging press 607, a post-forging mechanical arm 608, and a post-forging conveyor belt 609. The pre-forging mechanical arm 5 is used to transfer the heated short cylindrical billets to the pre-forging conveyor belt 601, the pre-upsetting mechanical arm 602 is used to transfer the short cylindrical billets on the pre-forging conveyor belt 601 to the upsetting forging press 603 for upsetting, the pre-forming mechanical arm 604 is used to transfer the upset billets to the pre-forming forging press 605 for pre-forming, the final forging mechanical arm 606 is used to transfer the pre-formed billets to the final forging forging press 607, the post-forging mechanical arm 608 is used to transfer the final forged gear products to the post-forging conveyor belt 609, and the post-forging mechanical arm 7 is used to transfer the gear products on the post-forging conveyor belt 609 to the input end of the cooling equipment 8.

[0080] The upsetting forging press 603, the pre-forming forging press 605, and the final forging forging press 607 are basically the same in structure, except that the die design and pressure setting are different for different processes. As shown in Figure 6As shown, the upsetting forging press 603, the preforming forging press 605, and the finish forging press 607 each include a frame 613, a forging hydraulic cylinder mounted on the frame 613, a moving die 614 mounted on the end of the piston rod of the forging hydraulic cylinder, and a stationary die 615 mounted on the frame 613 and located directly below the moving die 614. In this embodiment, the base and the sidewall of the stationary die 615 are embedded with resistance heating modules 616, and the frame 613 is provided with heat insulation boards 617 around the periphery of the stationary die 615, so that the forging can be performed while being heated and insulated, reducing the heat loss of the blank in the die, and ensuring the smooth progress of the forging process and the quality and performance of the final product. Further, the forging equipment 6 includes an insulation chamber 618, the longitudinal front end of which is provided with an input port for the entry of the pre-forging conveying belt 601 only, and the longitudinal rear end of which is provided with an output port for the entry of the post-forging conveying belt 609 only, and the remaining devices of the forging equipment are arranged in the insulation chamber 618. The periphery of the part of the pre-forging conveying belt 601 located outside the insulation chamber 618 is provided with an insulation fence 619. The design of the insulation chamber 618 and the insulation fence 619 further reduces the heat loss of the heated blank. Of course, a door for personnel to enter and exit is also provided on one side of the insulation chamber 618.

[0081] As Figure 7As shown, the forging equipment 6 includes a hydraulic control system, which includes a total oil tank 620, a upsetting oil pump 621, a preforming oil pump 622, a finish forging oil pump 623, a upsetting filter 624, a preforming filter 625, a finish forging filter 626, a upsetting electromagnetic reversing valve 627, a preforming electromagnetic reversing valve 628, a finish forging electromagnetic reversing valve 629. The hydraulic cylinders for forging are defined as a upsetting hydraulic cylinder 610, a preforming hydraulic cylinder 611, a finish forging hydraulic cylinder 612 according to the upsetting, preforming, finish forging processes; the total oil tank 620 is connected with the upsetting oil pump 621, the upsetting oil pump 621 is connected with the upsetting filter 624, the upsetting filter 624 is connected with the upsetting electromagnetic reversing valve 627, the upsetting electromagnetic reversing valve 627 is connected with the upsetting hydraulic cylinder 610, all through the oil pipe A; the total oil tank 620 is connected with the preforming oil pump 622, the preforming oil pump 622 is connected with the preforming filter 625, the preforming filter 625 is connected with the preforming electromagnetic reversing valve 628, the preforming electromagnetic reversing valve 628 is connected with the preforming hydraulic cylinder 611, all through the oil pipe B; the total oil tank 620 is connected with the finish forging oil pump 623, the finish forging oil pump 623 is connected with the finish forging filter 626, the finish forging filter 626 is connected with the finish forging electromagnetic reversing valve 629, the finish forging electromagnetic reversing valve 629 is connected with the finish forging hydraulic cylinder 612, all through the oil pipe C. The oil pipe A between the upsetting electromagnetic reversing valve 627 and the upsetting hydraulic cylinder 610 includes the oil pipe 1A connected with the upper inlet of the hydraulic cylinder and the oil pipe 2A connected with the lower inlet of the hydraulic cylinder; the oil pipe B between the preforming electromagnetic reversing valve 628 and the preforming hydraulic cylinder 611 includes the oil pipe 1B connected with the upper inlet of the hydraulic cylinder and the oil pipe 2B connected with the lower inlet of the hydraulic cylinder; the oil pipe C between the finish forging electromagnetic reversing valve 629 and the finish forging hydraulic cylinder 612 includes the oil pipe 1C connected with the upper inlet of the hydraulic cylinder and the oil pipe 2C connected with the lower inlet of the hydraulic cylinder.

[0082] Further, the oil pipe 1A and the oil pipe 1B are provided with a communication pipe, and the communication pipe is provided with an electric butterfly valve AB1, the oil pipe 2A and the oil pipe 2B are provided with a communication pipe, and the communication pipe is provided with an electric butterfly valve AB2, the oil pipe 1C and the oil pipe 1B are provided with a communication pipe, and the communication pipe is provided with an electric butterfly valve CB1, the oil pipe 2C and the oil pipe 2B are provided with a communication pipe, and the communication pipe is provided with an electric butterfly valve CB2, the connection point of the communication pipe and the oil pipe B is arranged on the side close to the preforming electromagnetic reversing valve 628, the oil pipe 1B and the oil pipe 2B are both provided with an electric butterfly valve BB, and the electric butterfly valve BB is arranged on the side close to the preforming hydraulic cylinder 611. The overflow valve 630 is installed on the oil pipe A, the oil pipe B and the oil pipe C.

[0083] The hydraulic control of the oil pipe A is described as an example. The upsetting oil pump 621 is pneumatic, and the hydraulic oil in the oil tank 620 is extracted and filtered through the upsetting filter 624 to reach the upsetting electromagnetic reversing valve 627. The upsetting hydraulic cylinder 610 includes an upper inlet and a lower inlet of the hydraulic oil. After the hydraulic oil enters the upper inlet, the piston rod is pushed out to realize the combination of the movable die 614 and the fixed die 615. After the hydraulic oil enters the lower inlet, the piston rod is retracted to realize the separation of the movable die 614 and the fixed die 615. The upsetting electromagnetic reversing valve 627 is used to control the hydraulic oil to enter the oil pipe 1A or the oil pipe 2A to realize the piston movement of the piston rod. When the pressure of the upsetting oil pump 621 is not enough, the two electric butterfly valves BB can be closed, the preforming oil pump 622 is opened, and the opening and closing of the electric butterfly valve AB1 and the electric butterfly valve AB2 are controlled to share the hydraulic pressure generated by the preforming oil pump 622 to the upsetting hydraulic cylinder 610.

[0084] The hydraulic systems of the three forging presses are independent and are combined through the communication pipes and the electric butterfly valves, which allows to share the hydraulic pressure under certain conditions and increases the flexibility of the hydraulic system. In addition, the arrangement of multiple overflow valves 630 also ensures the safety of the system and prevents damage caused by overpressure.

[0085] As shown in Figure 8 , the cooling device 8 includes a front tank section, a middle tank section and a rear tank section.

[0086] As shown in Figure 9 and 10 , the front tank section includes a horizontal linear conveyor belt 801 and a cooling fan 802 located above the conveyor belt. The conveyor belt uses a metal mesh belt surface with partitions, and a suction duct 803 connected to a suction fan is arranged below the conveyor belt. The cooling fan 802 air-cools the high-temperature gear products on the horizontal linear conveyor belt 801 in the front tank section, and the heat flow (including some dust impurities) generated by air cooling is sucked into the suction duct 803.

[0087] As shown in Figure 9 and Figure 13 , the rear tank section includes a horizontal linear conveyor belt 801 and a drying fan 804 located above the conveyor belt. The conveyor belt uses a metal mesh belt surface with partitions, and a liquid receiving groove 805 connected to a liquid discharge pipe is arranged below the conveyor belt. The drying fan 804 dries the liquid gear products on the horizontal linear conveyor belt 801 in the rear tank section, and the liquid blown down by the wind is collected in the liquid receiving groove 805 and discharged.

[0088] As shown in Figure 9 , Figure 11 and Figure 12As shown, the middle section of the tank comprises a plurality of straightly arranged cooling tanks 806 filled with liquid cooling medium, the temperature of the cooling medium in different cooling tanks 806 gradually decreases from the front section to the rear section of the tank, the cooling tanks 806 are provided with a zigzag conveying belt 807, the zigzag conveying belt 807 comprises a downward inclined section connected with the conveying belt in the front section or the last cooling tank 806, a horizontal straight section immersed in the cooling medium in the cooling tank 806, and an upward inclined section connected with the conveying belt in the next cooling tank 806 or the rear section of the tank; the conveying belt in the middle section of the tank is provided with a metal mesh belt surface with a partition.

[0089] The cooling device 8 reduces the dependence on manual experience and effectively prevents the product from being damaged due to rapid temperature change through the conveying system and the staged cooling mechanism, thereby ensuring the product quality.

[0090] Further, as shown in the figure, the cooling tank 806 is provided with a brush 808 in contact with the lower conveying belt. Figure 11 During the process of entering the cooling tank 806 for cooling after the forging part is discharged, the metal mesh conveying belt may be stuck with the oxide skin of the forging part, the stripping machine and some impurities, the brush 808 in contact with the lower conveying belt is arranged, and the brush 808 brushes the belt surface during the movement of the conveying belt, so that the cleanliness of the conveying belt is ensured and the maintenance time is prolonged.

[0091] After the gear product is cooled and dried, it can be manually taken out and transported to the next processing workshop for turning, milling, polishing and oiling processes.

[0092] The above examples are only used to explain the concept of the utility model, and are not limited to the protection of the utility model, and any non-essential changes to the utility model using the concept shall fall within the protection scope of the utility model.

Claims

1. A gear forging production line, characterized by, The application relates to a gear manufacturing system. The system comprises: a sawing machine for cutting long cylindrical blanks into short cylindrical blanks; a pre-furnace conveying belt device for conveying the short cylindrical blanks to the next process; a heating furnace for heating the short cylindrical blanks sent in to a forging and pressing required temperature; a forging and pressing device for forging and pressing the heated short cylindrical blanks to form gear products; a cooling device for cooling the gear products formed by forging and pressing; The system further comprises: a pre-furnace mechanical arm for transferring the short cylindrical blanks on the output side of the pre-furnace conveying belt device to the input end of the heating furnace; a pre-forging and pressing mechanical arm for transferring the heated short cylindrical blanks to the input end of the forging and pressing device; 2. A gear forging line as claimed in claim 1, characterized in that a post-forging and pressing mechanical arm for transferring the gear products formed by forging and pressing from the output end of the forging and pressing device to the input end of the cooling device.

3. A gear forging line as claimed in claim 2, characterized in that The pre-furnace conveying belt device comprises a support one, a support two and a preheating conveying belt, the two ends of the preheating conveying belt are fixed on the support one and the support two, a heating module is arranged above the preheating conveying belt, the heating module is used for preheating the short cylindrical blanks on the preheating conveying belt, and the heating module is an infrared heating module. The pre-furnace conveying belt device comprises a fixed seat one, a fixed seat two and a preheating hydraulic cylinder, the fixed seat one is located below the support one and is hinged to the support one, the preheating hydraulic cylinder is located below the support two, the fixed seat two is located below the preheating hydraulic cylinder, the piston rod end of the preheating hydraulic cylinder is hinged to the support two, and the cylinder body end of the preheating hydraulic cylinder is hinged to the fixed seat two. The preheating conveying belt is a conveying belt with a transverse partition plate. The preheating conveying belt is externally provided with a heat preservation fence.

4. A gear forging line as claimed in claim 1, wherein, The belt surface, the transverse partition plate and the inner wall of the heat preservation fence of the preheating conveying belt are all covered with a reflecting layer. The forging and pressing device comprises a pre-forging and pressing conveying belt, a pre-upsetting mechanical arm, a pre-upsetting forging and pressing machine, a pre-forming mechanical arm, a pre-forming forging and pressing machine, a final forging mechanical arm, a final forging forging and pressing machine, a post-final forging mechanical arm and a post-forging and pressing conveying belt.

5. A gear forging line as claimed in claim 4, characterized in that The pre-forging and pressing mechanical arm is used for transferring the heated short cylindrical blanks to the pre-forging and pressing conveying belt, the pre-upsetting mechanical arm is used for transferring the short cylindrical blanks on the pre-forging and pressing conveying belt to the pre-upsetting forging and pressing machine to perform upsetting, the pre-forming mechanical arm is used for transferring the upset blanks to the pre-forming forging and pressing machine to perform pre-forming, the final forging mechanical arm is used for transferring the pre-formed blanks to the final forging forging and pressing machine, the post-final forging mechanical arm is used for transferring the gear products formed by final forging to the post-forging and pressing conveying belt, and the post-forging and pressing mechanical arm is used for transferring the gear products on the post-forging and pressing conveying belt to the input end of the cooling device. The pre-upsetting forging and pressing machine, the pre-forming forging and pressing machine and the final forging forging and pressing machine all comprise a rack, a forging hydraulic cylinder mounted on the rack, a moving die mounted on the piston rod end of the forging hydraulic cylinder, and a fixed die mounted on the rack and located directly below the moving die. The base and the side wall of the fixed die are embedded with resistance heating modules, and the rack is provided with a heat preservation plate outside the fixed die.

6. A gear forging line as claimed in claim 5, characterized in that The forging equipment comprises a heat preservation chamber, an input port only for the pre-forging conveying belt is left at the front end of the heat preservation chamber in the longitudinal direction, an output port only for the post-forging conveying belt is left at the rear end of the heat preservation chamber in the longitudinal direction, and the outer periphery of the pre-forging conveying belt outside the heat preservation chamber is provided with a heat preservation fence.

7. A gear forging line as claimed in claim 5, wherein, The forging equipment comprises a hydraulic control system, which comprises a total oil tank, a upsetting oil pump, a preforming oil pump, a final forging oil pump, a upsetting filter, a preforming filter, a final forging filter, a upsetting electromagnetic reversing valve, a preforming electromagnetic reversing valve, and a final forging electromagnetic reversing valve. The hydraulic cylinders for forging are defined as a upsetting hydraulic cylinder, a preforming hydraulic cylinder, and a final forging hydraulic cylinder according to the upsetting, preforming, and final forging processes. The total oil tank, the upsetting oil pump, the upsetting oil pump, the upsetting filter, the upsetting filter, the upsetting electromagnetic reversing valve, the upsetting electromagnetic reversing valve, and the upsetting hydraulic cylinder are connected by an oil pipe A. The total oil tank, the preforming oil pump, the preforming oil pump, the preforming filter, the preforming filter, the preforming electromagnetic reversing valve, the preforming electromagnetic reversing valve, and the preforming hydraulic cylinder are connected by an oil pipe B. The total oil tank, the final forging oil pump, the final forging oil pump, the final forging filter, the final forging filter, the final forging electromagnetic reversing valve, the final forging electromagnetic reversing valve, and the final forging hydraulic cylinder are connected by an oil pipe C. The oil pipe A between the upsetting electromagnetic reversing valve and the upsetting hydraulic cylinder comprises an oil pipe 1A connected with the upper inlet of the hydraulic cylinder and an oil pipe 2A connected with the lower inlet of the hydraulic cylinder; the oil pipe B between the preforming electromagnetic reversing valve and the preforming hydraulic cylinder comprises an oil pipe 1B connected with the upper inlet of the hydraulic cylinder and an oil pipe 2B connected with the lower inlet of the hydraulic cylinder; and the oil pipe C between the final forging electromagnetic reversing valve and the final forging hydraulic cylinder comprises an oil pipe 1C connected with the upper inlet of the hydraulic cylinder and an oil pipe 2C connected with the lower inlet of the hydraulic cylinder. A communication pipe is arranged between the oil pipe 1A and the oil pipe 1B, and an electric butterfly valve AB1 is arranged on the communication pipe; a communication pipe is arranged between the oil pipe 2A and the oil pipe 2B, and an electric butterfly valve AB2 is arranged on the communication pipe; a communication pipe is arranged between the oil pipe 1C and the oil pipe 1B, and an electric butterfly valve CB1 is arranged on the communication pipe; a communication pipe is arranged between the oil pipe 2C and the oil pipe 2B, and an electric butterfly valve CB2 is arranged on the communication pipe; the connection point of the communication pipe and the oil pipe B is arranged on the side close to the preforming electromagnetic reversing valve; and an electric butterfly valve BB is arranged on the oil pipe 1B and the oil pipe 2B, and is arranged on the side close to the preforming hydraulic cylinder. An overflow valve is arranged on the oil pipe A, the oil pipe B, and the oil pipe C.

8. A gear forging line as claimed in claim 1, characterized in that, The cooling equipment comprises a front section, a middle section, and a rear section of the tank. The front section of the tank comprises a horizontal straight conveying belt and a cooling fan arranged above the conveying belt, the conveying belt adopts a metal mesh belt surface with a partition, and a suction duct connected with a suction fan is arranged below the conveying belt. The rear section of the tank comprises a horizontal straight conveyer belt with a metal mesh belt surface with partitions, and a liquid receiving groove connected with a liquid discharge pipe is arranged below the conveyer belt; The middle section of the tank comprises a plurality of straightly arranged cooling tanks filled with liquid cooling medium, the temperature of the cooling medium in different cooling tanks gradually decreases from the front section to the rear section, a broken line conveyer belt is arranged in the cooling tank, the broken line conveyer belt comprises a downward inclined section connected with the conveyer belt in the front section or the previous cooling tank, a horizontal straight section immersed in the cooling medium in the cooling tank, and an upward inclined section connected with the conveyer belt in the next cooling tank or the rear section of the tank; the conveyer belt in the middle section of the tank comprises a metal mesh belt surface with partitions.

9. A gear forging line as claimed in claim 8, characterized in that A brush is arranged in the cooling tank to contact the lower conveyer belt.

10. A gear forging line as claimed in claim 8, characterized in that The cooling tank comprises a tank body, a temperature sensor, a liquid discharge port, a liquid inlet port, and valves arranged on the liquid discharge port and the liquid inlet port.

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