CN114367624A

CN114367624A - Automatic multi-station forging production line for sector gear shaft

Info

Publication number: CN114367624A
Application number: CN202111636979.8A
Authority: CN
Inventors: 赵昌德; 郑世念; 张凯; 刘虹
Original assignee: Jinma Industrial Group Co ltd
Current assignee: Jinma Industrial Group Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-04-19

Abstract

The invention discloses an automatic multi-station forging production line for sector gear shafts, which comprises a feeding machine, a heating furnace, a dephosphorization device, a forging press and a cooling conveyor which are sequentially connected according to a processing flow, wherein the feeding machine is used for sequencing blank rods and then sending the blank rods to a first plate chain conveyor connected behind the feeding machine, and the plate chain conveyor is sequentially provided with a rust and burr removing device and a saponification device; the heating furnace and the forging press are connected through a second plate chain conveyor, the phosphorus removal device is fixed on the second plate chain conveyor, and the phosphorus removal device is provided with a steel wire wheel brush channel and a water mist channel; the forging press and the second plate chain conveyor realize material handling through six manipulators, and a double-station forging die is fixed in the forging press and comprises a forming station and an edge cutting station. The invention has the beneficial effects that: the automation of forging the sector gear shaft is realized, logistics transmission is completed by the mechanical arm or the conveyor, the automation of all stations and all processes is realized, and the forging quality of forged parts is guaranteed by the dephosphorization, the double-station forging die and the controllable isothermal slow-cooling conveyor.

Description

Automatic multi-station forging production line for sector gear shaft

Technical Field

The invention belongs to the field of gear shaft blank manufacturing, and particularly relates to an automatic multi-station forging production line for a sector gear shaft.

Background

The sector gear shaft is a mechanical part which supports a rotating part and rotates together with the rotating part to transmit motion, torque or bending moment, and the sector gear shaft is a transmission part in an automobile steering system, and is high in required strength and large in bearing torque.

The shape and deformation of the forged material show the characteristics of complex change and uneven distribution in the forging process, and the internal structure form of the material also changes in the forging process, which all have important influence on the mechanical property of the rear forging. The condition that the forging piece has performance defects due to uneven distribution of the material tissue structure often occurs in actual production, so that the control of the distribution condition of the internal tissue structure of the forging piece is beneficial to the improvement of the quality of the forging piece.

At present, the forging is generally carried out in a manual operation mode, burrs, rust and oxide skins on the surface of the heated blank rod exist in the blank rod, the oxide skins cannot be effectively removed, the quality of a forged piece is seriously influenced, meanwhile, the manual operation also causes that the material placement in the forging process is not regular enough, the operation cannot be carried out according to strict installation process requirements, the forging and pressing of the forged piece in a die are caused, the material flows unevenly, the internal organization form of the forged piece is further caused, and the quality of the forged piece is influenced.

And the annealing treatment after forging of the forging piece can cause the following influences on the forging piece:

1. the hardness of the forging is reduced, the plasticity is improved, and the machining and cold deformation processing are facilitated;

2. chemical components and structures of the forgings are homogenized, crystal grains are refined, and the performance of the forgings is improved or the forgings are prepared for quenching structures;

3. eliminating the internal stress and work hardening of the forging to prevent deformation and cracking;

therefore, the effective heat treatment after forging can further ensure the quality of the metal structure in the forge piece, and ensure the strength and the toughness of the gear shaft.

However, the present inventors have found that the above-mentioned problems can be effectively solved by controlling the burrs, the rust, and the scale on the surface of the heated bar and controlling the heat treatment after forging, in combination with the actual working.

Therefore, an automatic multi-station forging production line for the sector gear shaft is urgently needed to solve the problems of controlling burrs and rust, controlling oxide scales on the surface of a heated blank bar in the forging process and controlling heat treatment after forging.

Disclosure of Invention

The objects to be achieved by the present invention are: the method solves the problems of controlling burrs and rust in the forging process, controlling oxide skin on the surface of the heated blank bar and controlling heat treatment after forging.

In order to achieve the above object, the present invention provides an automated multi-station forging line for sector shafts.

The invention adopts the following specific technical scheme:

an automatic multi-station forging production line for sector gear shafts comprises a feeding machine, a heating furnace, a dephosphorization device, a forging machine and a cooling conveyor which are sequentially connected according to the processing flow,

the feeding machine sorts the blank rods and sends the blank rods to a first plate chain conveyor connected behind the feeding machine, and a rust and burr removing device and a saponification device are sequentially arranged on the plate chain conveyor;

a secondary material pushing device is arranged at the feed end of the heating furnace;

the heating furnace and the forging press are connected through a second plate chain conveyor, the phosphorus removal device is fixed on the second plate chain conveyor, and the phosphorus removal device is provided with a steel wire wheel brush channel and a water mist channel;

the forging press and the second plate chain conveyor realize material handling through a six-axis manipulator, and a double-station forging die is fixed in the forging press and comprises a forming station and an edge cutting station;

the cooling conveyor is provided with a plurality of sections of temperature control devices for controlling the cooling temperature.

By adopting the design, the forging process of the sector gear shaft is realized:

1. feeding machine

A burr and rust removing device is additionally arranged, and saponification is carried out after burr and rust removal, so that the oxidation degree of the blank rod in the heating process in a heating furnace is reduced;

2 heating furnace

The heating temperature is 1150-1230 ℃, the temperature is controllable, the material is separated in an over-temperature mode, the initial forging temperature is guaranteed, and the phenomenon of uneven material heating is improved; the heating frequency can be automatically controlled according to the production beat and is kept at 12 s-16 s/piece;

3 phosphorus removal device

Removing most of oxide skin on the cylindrical surface of the blank by a steel wire wheel brush; and the oxide skin is subjected to dust suppression by fine water mist, dust is absorbed by a negative pressure pipeline, and the scale formed on the surface of the blank rod by the oxide skin after heating is removed.

4. Forging press

A combined die structure is fixed in the forging press, and a vulnerable inner die core and a liftout pin of the die can be replaced; the placing direction of the tooth shape of the die is opposite to the tooth shape direction of the trimming procedure, so that a robot can conveniently grab from the forging die and accurately position and place on the trimming die; the forging pressure, the ejection pressure and the height can be adjusted; the die carrier is provided with a positioning groove and a module gap of 0.20 +/-0.05 mm, so that blind assembly of an upper forging die and a lower forging die is facilitated, the die carrier is provided with a guide device gap of 0.30 +/-0.08 mm, and the module is provided with a lock catch gap of 0.15 +/-0.025 mm, so that accurate die assembly of the die is facilitated, and forging offset is reduced;

the trimming die mainly comprises an upper die and a lower die; the upper die comprises a bottom plate, 4 compression springs, a pressure plate, a quick-change punch, a punch positioning seat and the like; the lower die comprises a die frame, a trimming die, a flash pusher, a forge piece feeder and the like, wherein the die frame comprises a bottom plate and two vertical plates, the forge piece feeder is arranged between the two vertical plates, and the forge piece feeder comprises a material receiving cup, a push plate, a push-pull cylinder and the like; after the toothed wheel shaft with the flash is placed into the trimming die of the lower die by the stepping manipulator, the upper die descends, the upper die pressing plate compresses the flash, and the punch punches off the connecting skin along the same direction; the toothed wheel shaft falls into the material receiving cup, the material receiving cup is pushed out from the bottom of the trimming die by the air cylinder, meanwhile, the upper die moves upwards, the flash pusher pushes the flash into the conveying chain to be conveyed into the waste basket, and then the six-shaft mechanical arm grabs out the forged piece and places the forged piece on the cooling conveyor.

5. Controllable isothermal slow cooling

The robot orderly combines and discharges the forgings; the speed of the cooling conveyor is controllable, and is controlled to be 50mm +/-10 mm/s; the temperature is adjustable, and is divided into a plurality of temperature intervals: zone A, 650 +/-30 ℃; zone B at 820 ℃. + -. 20 ℃; area C, 860 ℃ +/-15 ℃; zone D, 560 ℃ +/-15 ℃; F. and (5) protecting atmosphere to reduce oxidation.

As a further improvement of the invention, an automatic rotating device is arranged in the heating furnace, and the blank is clamped by the automatic rotating device and rotates by 90-180 degrees in a timing or anticlockwise direction and moves along the feeding direction of the conveying line.

When the steel bar is continuously heated, the magnetic field intensity at two ends of the inductor is reduced to half of that at the middle part due to the end effect of the induction coil, so that the heating efficiency is greatly reduced, the temperature at the tail part of the steel bar is lower than that at the normal part, and the longitudinal temperature difference is generated and is related to factors such as the size of steel, the power supply frequency, the heating temperature, the connection of the head and the tail during the steel bar treatment, and the like, wherein the end effect of the steel bar heating is most obvious, the length of a low-temperature area at the end part of the small-caliber steel pipe is 30-50mm, the temperature is reduced by about 50 ℃, and the end effect is increased along with the increase of the diameter of the steel bar, so that the problem is effectively solved after the steel bar is supported by the automatic rotating device, and meanwhile, the steel bar, namely the blank bar in the scheme, is uniformly heated in the heating furnace through rotation, and the material heating phenomenon is further improved.

As a further improvement of the invention, a cavitation jet nozzle is arranged on a rotating shaft support on the steel wire wheel brush, and water flow is sprayed on the surface of the blank after cavitation.

By adopting the design, the rotary steel wire wheel brush scrapes off or loosens oxide skin on the surface of the blank rod heated by the heating furnace, at the moment, the cavitation jet nozzle sprays water flow onto the surface of the blank after cavitation, a large amount of cavitation bubbles are generated when water flow passes through the cavitation jet nozzle by controlling parameters such as pressure, flow velocity and the like, the cavitation bubbles are utilized to collapse in a narrow area on the surface of a material to generate micro-jet impact of 140-170 MPa, and the residual oxide skin on the surface of the blank rod is removed.

The cavitation jet technique is in the state of the art and after reading this document, the skilled person can therefore look up the tool information and will not be described again here.

As a further improvement of the invention, superheated steam with the temperature of more than or equal to 800 ℃ is adopted in the water mist channel.

By adopting the design, the cavitation jet water mist in the last improvement is heated in the superheated steam water mist channel with the temperature of more than or equal to 800 ℃, the temperature of the blank bar is ensured to be at the temperature required by forging, and simultaneously, smoke dust generated when the steel wire wheel brush removes oxide skin is formed to flow directionally by utilizing the principle of cold and hot air convection, is wet and smooth, is prevented from being diffused and is sucked away by a negative pressure pipeline together, thereby achieving the purposes of dust absorption and environmental protection.

As a further improvement of the invention, the forming station comprises a blunt rough die, a pre-forging die and a finish-forging die, the edge of the blunt rough die is a streamline radius, the allowance of the pre-forging die is A, and A is more than or equal to 10mm and more than or equal to 5 mm. The filling of the pre-forging piece is promoted, the filling quality of the forging piece is improved, and therefore the material utilization rate is improved.

As a further improvement of the invention, the workpiece carrying of the blunt mold, the pre-forging mold, the finish forging mold and the edge cutting station is realized by adopting a stepping manipulator, the six-shaft manipulator grabs the blank bar from the end positioning position of the third plate face conveyor and places the blank bar on the blunt mold, and then the gear shaft with the edge cut completed is taken away and placed on the cooling conveyor. The accurate placement of the forge piece in the die cavity during station changing is realized, and the processes of blunt and rough forging, pre-forging and finish forging are quickly and effectively completed.

As a further improvement of the invention, one side of the blunt mold, the pre-forging mold and the finish-forging mold is provided with a mold release agent spraying device which is used for spraying mold release agent to the mold cavity when the station of the forge piece is changed. The demolding agent spraying device is linked with the stepping manipulator, when the stepping manipulator K grabs the workpiece from the cavity, the demolding agent spraying device starts demolding agent operation, the forging demolding agent in the scheme adopts a K-1300 forging demolding agent which is commonly used in the market, and the forging demolding agent is composed of various high-temperature-resistant powder and special release components.

As a further improvement of the invention, the temperature control devices of the sections of the cooling conveyor comprise a heating section and a natural air cooling section. The heating section and the natural air cooling section are mutually feedback-controlled to ensure that the temperature of the respective controlled area is in a controllable range, the conveying speed of the cooling conveyor is controllable, and the speed is controlled to be 50mm +/-10 mm/s; the temperature is adjustable, and is divided into a plurality of temperature intervals: zone A, 650 +/-30 ℃; zone B at 820 ℃. + -. 20 ℃; area C, 860 ℃ +/-15 ℃; zone D, 560 ℃ +/-15 ℃; F. and (5) protecting atmosphere to reduce oxidation.

By adopting the treatment, the hydrogen content in the blank bar is reduced, and white spots are not formed; improving the deformation stress in the blank bar; avoiding generating excessive structural stress and thermal stress, obtaining spherical pearlite for convenient cutting processing, wherein the best dehydrogenation effect temperature is 600-700 ℃ from the view point of diffusibility and solubility of hydrogen in different structures of steel, and from the view point of austenite isothermal transformation curve of 9Cr steel and 9Cr type alloy steel added with alloying elements of Mo, W and V, although both austenite accelerating decomposition areas are provided, because the incubation period is short, and the undercooled austenite is mostly decomposed in the region of 650-700 ℃ when the forging is cooled, the undercooling temperature requirement is not strict, can be selected in a wide range from above the martensite point to the austenite first decomposition region, and hydrogen diffusion at 650 to 700 ℃ is most suitable in view of both the structure transformation and the hydrogen solubility and diffusion ability of such a structure, and, the carbide spheroidizing effect is realized at the temperature, and the holding time at the temperature depends on the hydrogen content of the forged piece and the size of the forged piece. Therefore, after the blank bar is subjected to heat preservation, the blank bar can be slowly cooled, so that overlarge thermal stress can be avoided, hydrogen can be continuously diffused, overlarge structural stress and thermal stress can be avoided, and spherical pearlite can be obtained to facilitate cutting.

Preferably, the heating section is heated by an electric heating wire and is provided with a temperature sensor for controlling the heating time and the heating temperature in a feedback manner.

The invention has the positive effects that: the automatic forging of the sector gear shaft is realized, logistics transfer is completed by a mechanical arm or a conveyor, full-station and full-process automation is realized, the problems of controlling burrs, floating rust and oxide skins on the surface of a heated blank bar in the forging process and controlling heat treatment after forging are solved, and the forging quality of the sector gear shaft is effectively guaranteed.

Drawings

FIG. 1 is a three-dimensional schematic view of an automated multi-station forging line for sector shafts according to the present invention;

FIG. 2 is a three-dimensional schematic view of another perspective of the sector shaft automated multi-station forging line of the present invention shown in FIG. 1;

FIG. 3 is an enlarged view of the sector shaft automated multi-station forging line A of the present invention shown in FIG. 1;

FIG. 4 is a schematic view of a secondary material returning structure of the sector shaft automated multi-station forging line of the present invention shown in FIG. 3;

FIG. 5 is an enlarged view of the sector shaft automated multi-station forging line B of the present invention shown in FIG. 2;

FIG. 6 is an enlarged view of the sector shaft of the automated multi-station forging line C of the present invention shown in FIG. 2;

FIG. 7 is an enlarged view of the sector shaft automated multi-station forging line D of the present invention shown in FIG. 2;

illustration of the drawings: 1-feeder, 101-pusher, 102-basket, 103-first plate chain conveyor, 104-sorting baffle, 105-deburring wheel, 106-saponification box, 107-secondary pusher, 1071-small pusher, 1072-guide column, 1073-first cylinder, 1074-connector, 2-heating furnace, 201-first branch channel, 202-second branch channel, 203-pneumatic pusher, 204-first storage basket, 205-second storage basket, 206-third branch channel, 3-second plate chain conveyor, 301-second cylinder, 302-discharge channel, 303-third storage basket, 304-first distributor, 305-discharge slope, 306-second distributor, 307-third plate conveyor, 308-third plate conveyor, 309-dephosphorization box, 310-steam generator and negative pressure dust remover, 311-dephosphorization box inlet, 4-dephosphorization device, 5-fence, 501-six-axis mechanical control box, 7-six-shaft mechanical arm, 8-finished product bin, 9-cooling conveying line, 901-heating section, 902-natural air cooling section, 903-guide chute, 10-forging press, 1001-forming die, 10-trimming die and 11-stepping mechanical arm.

Detailed Description

The invention is described in detail below with reference to the following figures and specific embodiments:

the specific embodiment is as follows:

in the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Specific implementations of the present invention are described in detail below with reference to specific embodiments.

The first embodiment is as follows:

the utility model provides an automatic multistation forging line of sector gear axle, its initiating terminal is equipped with material loading machine 1, material loading machine 1 is equipped with basket 102, be equipped with push pedal 101 in the basket 102, the thickness of push pedal 101 is the same with the diameter of blank stick, push pedal 101 is equipped with threely, be low push pedal respectively, well push pedal and high push pedal, the blank stick of low push pedal in with basket 102 pushes away for well push pedal, well push pedal pushes away the blank stick again for high push pedal, the axial of blank stick is inequality with the thickness trend of push pedal 101 at this in-process, can't stop in the push pedal, fall feed back basket 101 under self action of gravity, carry out next time and push away the material circulation, can stop on push pedal 101 and include two kinds of circumstances by pushing away high push pedal: horizontally lying and vertically standing, pushing the blank rods in the two postures into a first plate chain conveyor 103 by a high push plate, conveying the blank rods by the first plate chain conveyor 103, entering a sorting station of a sorting baffle 104 fixed in the middle of the first plate chain conveyor, blocking the vertically standing blank rods by the sorting baffle 104, dropping the blank rods into a material returning basket 101, and performing next material pushing circulation, wherein the horizontally lying blank rods enter a working area of a deburring wheel 105 through sorting;

the deburring wheel 105 comprises two steel wire wheel brushes, the two steel wire wheel brushes are symmetrically arranged on two sides of the first plate chain conveyor 103, the distance between the two steel wire wheel brushes is smaller than a half of the distance between the blank bars, burrs at the end parts of the blank bars are brushed off under the rotating action of the two steel wire wheel brushes, and attachments adhered to the surfaces of the blank bars are brushed off together, a saponification box is arranged at the rear end of the deburring wheel 105, grease and sodium hydroxide are sprayed, and then baking is carried out to replace the traditional mode of a chemical making pot, so that streamlined operation is realized conveniently, and oxidation of the surfaces of the blank bars in the heating process is reduced;

the manufactured blank rod enters a secondary material pushing station, the same blank rod is pushed into the heating furnace twice by the secondary material pushing device 107, the heating furnace is realized by adopting an intermediate frequency furnace, and the secondary material pushing is characterized in that two end sections of the blank rod enter the heating furnace, so that the blank rod is heated uniformly; the secondary pushing device 107 comprises a first air cylinder 1073, a connector 1074 is arranged at the end of the first air cylinder 1073, the connector 1074 is movably connected with the small push plate 1071, the first air cylinder 1073 pushes the blank rod into the heating furnace twice under the guidance of the guide pillar 1072, and during specific operation, half stroke air volume is provided for the first air cylinder 1073 during first pushing, and one stroke air volume is provided for the first air cylinder 1073 during second pushing.

The blank rod heated in the heating furnace is treated in three ways:

when the processing beat of the subsequent processing is too slow, the redundant blank rods enter the first storage basket through the first material distribution channel 201;

when the processing rhythm is normal, the blank rod enters the second plate chain conveyor 3 through the second material distribution channel 202, wherein the rhythm is controlled by the pneumatic push plate 203 when the blank rod enters the second plate chain conveyor 3, so that the blank rod can accurately fall into a material box of the second plate chain conveyor 3;

when the temperature of the heated blank rod cannot meet the production requirement, the blank rod enters a second storage basket 205 through a third material distribution channel 206;

the blank rods entering the second plate chain conveyor 3 fall into the discharge channel 302 when being conveyed to the tail end of the second plate chain conveyor 3, slide to the bottom of the discharge channel 302, and are pushed into the phosphorus removal device 4 by a second cylinder 301 arranged at the bottom of the discharge channel 302;

a rack is arranged in the phosphorus removal device 4, a phosphorus removal box 309 is arranged in the middle of the rack, a steam generator and a negative pressure dust remover 310 are arranged on one side of the rack, the phosphorus removal device is provided with a steel wire wheel brush channel and a water mist channel, a rotating shaft support on the steel wire wheel brush is provided with a cavitation jet nozzle, water flow is jetted to the surface of a blank after cavitation, the rotating steel wire wheel brush scrapes or loosens oxide skin on the surface of the blank rod after heating by a heating furnace, at the moment, the cavitation jet nozzle sprays the water flow to the surface of the blank after cavitation, a large amount of cavitation bubbles are generated when the water flow passes through the cavitation nozzle by controlling parameters such as pressure and flow rate, the cavitation bubbles are utilized to be collapsed in a narrow area on the surface of a material to generate micro jet impact of 140-170 MPa, and residual oxide skin on the surface of the blank rod is removed;

The steam generator and the negative pressure dust collector 310 provides superheated steam with the temperature of more than or equal to 800 ℃ to one end of a water mist channel, provides negative pressure airflow to the other end of the water mist channel, heats cavitation jet flow water mist in the superheated steam water with the temperature of more than or equal to 800 ℃ in the water mist channel, ensures that the temperature of a blank rod is at the temperature required by forging, simultaneously utilizes the cold and hot air convection principle to remove oxide skin of the steel wire wheel brush to generate smoke dust to form directional flow, is wet and smooth, prevents diffusion, is sucked away by a negative pressure pipeline together, and achieves the purposes of dust absorption and environmental protection;

the dephosphorized blank rods enter a first distributor 304 and a second distributor 306 through a discharging slope 305, when only one forging press 10 is used, the second distributor 306 is used for supplying materials to the forging press 10, the first distributor 304 is used for adjusting the production rhythm of the feeding and forging, and when the feeding is larger than the production rhythm of the forging press 10, the first distributor 304 sends redundant blank rods into a third storage basket 303, so that the production rhythm of the whole production line is unified, and the smooth production is ensured;

when the second distributor 306 is used for feeding the forging press 10, the blank rod is conveyed by a third plate conveyor 307, a material stopper 308 is arranged in the middle of the third plate conveyor 307 and used for feeding the blank rod to the forging press according to the production rhythm of the forging press, the blank rod passing through the material stopper 308 is positioned at the tail end of the third plate conveyor 307, and the blank rod is placed in a forging die in the forging press after being grabbed by a six-axis manipulator 7 to be subjected to upsetting, pre-forging, final forging and edge cutting, wherein the upsetting, pre-forging, final forging, end forging and edge cutting are respectively performed in the upsetting die, the pre-forging die, the final forging die and the edge cutting die, workpiece conveying between die cavities of the dies is realized by adopting a stepping manipulator, the six-axis manipulator 7 grabs the blank rod from the tail end positioning position of the third plate conveyor 307 and places the blank rod in the upsetting die, and the gear shaft subjected to edge cutting is taken away on a cooling conveyor 9;

the stepping manipulator is a three-coordinate manipulator which is matched and linked with the press, is universal automatic nonstandard equipment in the market, and the structure of the stepping manipulator is well known by people in the field of automation and is not described again.

The cooling conveyor 9 comprises a plurality of sections of temperature control devices, each temperature control device is provided with a heating section 901 and a natural air cooling section 902, the heating section and the natural air cooling section are mutually feedback-controlled to ensure that the temperature of the respective controlled areas is within a controllable range, the conveying speed of the cooling conveyor 9 is controllable, and the speed is controlled to be 50mm +/-10 mm/s; the temperature of the cooling conveyor 9 is adjustable, divided into a plurality of temperature intervals: zone A, 650 +/-30 ℃; zone B at 820 ℃. + -. 20 ℃; area C, 860 ℃ +/-15 ℃; zone D, 560 ℃ +/-15 ℃; F. atmosphere protection, oxidation reduction;

the blank bar after the forging and annealing can avoid generating excessive thermal stress and continuously diffuse hydrogen, avoid generating excessive structural stress and thermal stress, obtain spherical pearlite for cutting processing, and finally the finished product enters a finished product bin 8 from the tail end of a cooling conveyor 9 to finish the forging processing.

The second embodiment is as follows:

on the basis of the first specific embodiment, an automatic rotating device is arranged in the heating furnace, and blanks are clamped by the automatic rotating device to rotate by 90-180 degrees in a timing or anticlockwise mode and move along the feeding direction of the conveying line.

Specifically, the heating furnace is internally conveyed by plate chains, each plate chain is provided with a V-shaped supporting plate, the bottom of each V-shaped supporting plate is provided with a roller, the top of each roller is exposed above the bottom of each V-shaped supporting plate and is connected with a blank rod, the roller and the direction of conveying the plate chains form an angle of 45 degrees, the rollers are driven to rotate on the bottom supporting plates in the process of forward conveying of the plate chains, and the rollers drive the blank rods to rotate in the V-shaped supporting plates.

The third concrete embodiment: the forming station comprises a blunt rough die, a pre-forging die and a finish-forging die, the edge of the blunt rough die is a streamline radius, the forging is facilitated, the allowance of the flowing pre-forging die of the material is A, and A is more than or equal to 10mm and more than or equal to 5 mm. The filling of the pre-forging piece is promoted, the filling quality of the forging piece is improved, and therefore the material utilization rate is improved.

The foregoing has outlined broadly some of the aspects and features of the various embodiments, which should be construed to be merely illustrative of various potential applications. Other beneficial results can be obtained by applying the disclosed information in a different manner or by combining various aspects of the disclosed embodiments. Other aspects and a more complete understanding may be obtained by reference to the detailed description of the exemplary embodiments taken in conjunction with the accompanying drawings, based on the scope defined by the claims.

The invention also discloses the following technical scheme:

the first scheme is as follows: the periphery of the forging press 10 is provided with the fence 5, one side of the fence 5 is provided with a fence door 501 for facilitating access during maintenance, the six-axis manipulator control box 6 is arranged on the outer side of the fence 5, and in production, workers do not need to enter the fence, so that safe production is realized.

The above examples illustrate the present invention in detail. It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and that various changes, modifications, additions, deletions, and substitutions which may be made by those skilled in the art within the spirit of the present invention are also within the scope of the present invention.

Claims

1. The utility model provides an automatic multistation forging line of sector gear axle, includes according to the flow of working including consecutive material loading machine, heating furnace, phosphorus removal device, forging press and cooling conveyer, its characterized in that:

2. The automatic multi-station forging line for the sector gear shafts according to claim 1, wherein an automatic rotating device is arranged in the heating furnace, and blanks are clamped by the automatic rotating device to rotate 90-180 degrees in a timing or anticlockwise mode and move along the feeding direction of the conveying line.

3. The automatic multi-station forging line for the sector gear shafts according to claim 2, wherein cavitation jet nozzles are arranged on the rotating shaft support on the steel wire wheel brush, and jet water flow onto the surface of the blank after cavitation.

4. The automatic multi-station forging line for the sector gear shaft according to claim 3, wherein superheated steam with the temperature of more than or equal to 800 ℃ is adopted in the water mist channel.

5. The automatic multi-station forging line for the sector gear shaft according to any one of claims 1 to 4, wherein the forming station comprises a blunt rough die, a pre-forging die and a finish-forging die, edges of the blunt rough die are streamline rounded, the allowance of the pre-forging die is A, and 10mm is larger than or equal to A and larger than or equal to 5 mm.

6. The automatic multi-station forging line for the sector gear shafts according to claim 5, wherein workpiece carrying of the blunt dies, the pre-forging dies, the finish forging dies and the trimming stations is achieved through the stepping manipulator, the six-shaft manipulator grabs the blank bars from the end positioning position of the third plate face conveyor and places the blank bars on the blunt dies, and the trimmed gear shafts are taken away and placed on the cooling conveyor.

7. The automatic multi-station forging line for the sector gear shafts according to claim 6, wherein the blunt dies, the pre-forging dies and the finish-forging dies are provided with a release agent spraying device on one side for spraying release agent to the die cavities when the stations of the forgings are changed.

8. The automated multi-station forging line for sector gear shafts according to claim 7, wherein the plurality of sections of temperature control devices of the cooling conveyor comprise a heating section and a natural air cooling section.

9. The automatic multi-station forging line for the sector gear shafts according to claim 8, wherein the heating section is heated by an electric heating wire and is provided with a temperature sensor for feedback control of heating time and heating temperature.