CN113578991A

CN113578991A - Machining die and machining method for gear

Info

Publication number: CN113578991A
Application number: CN202110718517.4A
Authority: CN
Inventors: 丁祥; 叶强华; 朱国正
Original assignee: Taizhou Rich Power Machinery Co ltd
Current assignee: Taizhou Rich Power Machinery Co ltd
Priority date: 2021-06-28
Filing date: 2021-06-28
Publication date: 2021-11-02
Anticipated expiration: 2041-06-28
Also published as: CN113578991B

Abstract

The invention discloses a gear machining die and a gear machining method in the technical field of gear machining dies, and the gear machining die comprises a machining table, wherein the top of the machining table is fixedly connected with two telescopic cylinders, and the inner ends of the two telescopic cylinders are fixedly connected with semi-arc plates; when the gear is produced by using the processing die each time, the plurality of arc gears are butted with each other to slowly extrude the softened material in the forward direction, so that the outer surface of the softened material forms formed teeth, after the extrusion is finished, the second sliding rod and the pressing gear fall downwards by using the pulling mechanism, the positioning mechanism and the opening mechanism to impact the extruded gear, the gear is completely extruded and formed, the partial position expansion of the gear in the extrusion process is avoided, the teeth of the formed gear are ensured to be in a good state, after the extrusion is finished, the plurality of arc gears exit along the teeth of the gear, the interference between the processing die and the teeth of the gear is avoided, the demolding is simpler and more convenient, and the qualified rate of the forming of the gear is improved.

Description

Machining die and machining method for gear

Technical Field

The invention relates to the technical field of gear machining dies, in particular to a gear machining die and a gear machining method.

Background

The transmission gear is a mechanical element for transmitting motion and power, generally comprises gear teeth, tooth sockets, end faces, a normal face, addendum circles, dedendum circles, base circles and reference circles, most of the traditional gear machining adopts gear grinding for machining, but the machining is complicated, and the machining time is long, so that part of gears are machined by adopting a mold at present, and the machining speed is improved.

The prior art discloses a patent of the invention in the aspect of a machining die of a part of gears, and a Chinese patent with the patent application number of CN201721457923.5 discloses a precision machining die of a gear, which comprises a gear blank and the machining die, wherein the machining die is wrapped on the outer surface of the gear blank, the machining die is set into two machining half dies with symmetrical left and right sides, tooth extrusion grooves for tooth forming are uniformly arranged on the inner walls of the machining half dies, two die extrusion devices capable of being connected and tightened step by step are arranged between the two machining half dies, the die extrusion devices are set into two groups and symmetrically fixed at two ends of the machining half dies, and the die extrusion devices and the two machining half dies form the precision machining die of the gear.

The prior art utilizes the mould to extrude into the tooth to softened material after, when utilizing two half-gears of actuating mechanism pulling to open the drawing of patterns, after the gear is by compression moulding, because block between tooth and the mould, the mould can't be opened this moment, and the tooth of the gear and the shaping tooth of mould contact are close laminating in many places this moment, lead to fashioned gear to be difficult to directly pushed out, make the drawing of patterns difficult, and when softened material was extruded, the inflation appears easily in its top, lead to partial extrusion's tooth incomplete, the gear qualification rate that leads to producing is lower.

Based on the above, the invention designs a gear processing mold and a gear processing method, so as to solve the above problems.

Disclosure of Invention

The invention aims to provide a gear processing die and a gear processing method, which aim to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a machining die for a gear comprises a machining table, wherein two telescopic cylinders are fixedly connected to the top of the machining table, the inner ends of the two telescopic cylinders are fixedly connected with semi-arc plates, the bottom of the machining table is rotatably connected with a first rotating shaft, the first rotating shaft is fixedly connected with a first mounting ring through two first connecting blocks, the bottom end of the first rotating shaft is connected with a first gear through a one-way bearing, the bottom of the two semi-arc plates is fixedly connected with L-shaped racks, a first sliding chute for the L-shaped racks to slide transversely is formed in the machining table, the two L-shaped racks are meshed with the first gear, a first push rod is rotatably connected to the top of the first mounting ring, a first slide rod is rotatably connected to the outer end of each first push rod, a plurality of second sliding chutes for the first slide rods to slide respectively are formed in the machining table, and an arc gear is fixedly connected to the top end of each first slide rod, the processing table comprises a plurality of arc gears, wherein the arc gears form extrusion forming gears together, the arc gears are all contacted with the inner side walls of semi-arc plates, an L-shaped support is fixedly connected to the top of the processing table, a second sliding rod in sliding connection with the L-shaped support penetrates through the L-shaped support, the bottom end of the second sliding rod is fixedly connected with a pressing gear, the pressing gear and the arc gears at the bottom of the L-shaped support form the same gear shape, the top of the L-shaped support is connected with a positioning mechanism for positioning the second sliding rod, the top of the semi-arc plates is connected with an opening mechanism, the opening mechanism is used for opening the positioning mechanism when the two semi-arc plates are closed, and the top end of the second sliding rod is connected with a pulling mechanism for enabling the second sliding rod to move up and down;

the positioning mechanism comprises a first connecting plate, a positioning insertion rod which is connected with the first connecting plate in a sliding mode penetrates through the first connecting plate, a first baffle is fixedly connected to the rear end of the positioning insertion rod, a first spring which is located between the first connecting plate and the first baffle is sleeved on the outer surface of the positioning insertion rod, and a positioning hole for the positioning insertion rod to insert is formed in the outer surface of the second sliding rod;

the opening mechanism comprises two L-shaped connecting plates, the two L-shaped connecting plates are fixedly connected to the left side and the right side of the first baffle respectively, the front side walls of the two L-shaped connecting plates are fixedly connected with first guide blocks, the tops of the two semi-arc plates are fixedly connected with second guide blocks, and the second guide blocks are used for extruding the first guide blocks;

the pulling mechanism comprises two second connecting plates, the two second connecting plates are fixedly connected to the left side and the right side of the first connecting plates respectively, guide wheels are rotatably connected to the front side walls of the two first connecting plates, pulling steel cables are fixedly connected to the top ends of the two second guide blocks respectively, and the inner ends of the two pulling steel cables bypass the two guide wheels on the same side of the two pulling steel cables respectively and are fixedly connected to the top ends of the second sliding rods;

the top parts of the two second connecting plates are fixedly connected with L-shaped supporting plates, first electric cylinders fixedly connected with the L-shaped supporting plates penetrate through the L-shaped supporting plates, and the bottoms of the extending ends of the two first electric cylinders are fixedly connected with columnar sleeves which are respectively sleeved on the outer surfaces of the two pulling steel ropes;

the processing table is characterized in that a jacking column is penetrated through the top of the processing table and is in sliding connection with the processing table, the bottom ends of the two jacking columns are fixedly connected with a first extrusion block, the bottom of the processing table is fixedly connected with two air springs, the inner ends of the two air springs are fixedly connected with arc-shaped sliding plates, the arc-shaped sliding plates are used for being extruded by a first sliding rod to slide outwards, fixed strips are fixedly connected to the inner side walls of the two arc-shaped sliding plates, the bottoms of the two fixed strips are fixedly connected with a second extrusion block, the second extrusion block is used for extruding the first extrusion block, the bottom of the processing table is fixedly connected with two positioning baffles, and the two positioning baffles are respectively contacted with the rear ends of the front fixed strip and the rear fixed strip;

a machining method of a machining die of a gear comprises the following specific steps:

the method comprises the following steps: firstly, the two telescopic cylinders are in a retraction state to drive the two semi-arc plates to be in an opening rotary table, the plurality of arc gears are in a separation state, and the second sliding rod is positioned by the positioning mechanism;

step two: placing the high-temperature softened material into the top of the processing table and enabling the material to be positioned inside the plurality of opened arc gears;

step three: then, simultaneously starting the two telescopic cylinders to drive the telescopic cylinders and the fixedly connected semi-arc plates to simultaneously move towards the middle position, and extruding and forming the softened gear material when the two semi-arc plates move inwards;

step four: after extrusion molding, the positioning mechanism is opened by the opening mechanism, the pulling mechanism is released, and the second sliding rod and the pressing gear slide downwards at the same time, so that the pressing gear falls down quickly under the action of gravity and the extrusion is performed to extrude the gear;

step five: after the gear is extruded and formed, the gear is cooled for a period of time, the two telescopic cylinders begin to retract, the first mounting ring begins to rotate, the plurality of arc-shaped gears are driven to start to move outwards, and the arc-shaped gears are separated from the formed gear along the tooth direction of the formed gear;

step six: the semi-arc-shaped plate passes through the pulling mechanism, the second slide bar is pulled to be completely reset, the positioning hole in the outer surface of the second slide bar is in contact with the positioning inserted bar, and the positioning inserted bar positions the second slide bar again to complete one-time gear machining.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, when the gear is produced by using the processing die each time, the plurality of arc gears are butted with each other to slowly extrude the softened material in the forward direction, so that the outer surface of the softened material forms the molded teeth, after the extrusion is finished, the second sliding rod and the pressing gear fall downwards by using the pulling mechanism, the positioning mechanism and the opening mechanism to impact the extrusion molded gear, the gear is completely extruded and molded, partial position expansion of the gear in the extrusion process is avoided, the teeth of the molded gear are ensured to be in a good state, after the extrusion is finished, the plurality of arc gears exit along the teeth of the gear, the interference between the processing die and the teeth of the gear is avoided, the demolding is simpler and more convenient, and the qualified rate of the molding of the gear is improved.

2. According to the invention, the two first electric cylinders are enabled to do telescopic motion by starting the two first electric cylinders, the first electric cylinders drive the two pulling steel ropes to pull the first sliding rods up and down through the columnar sleeves, so that the first sliding rods and the pressing gear move up and down back and forth, the pressing gear can impact the top of the extrusion-molded gear for multiple times, the top of the gear is impacted into a horizontal state, and the gear is extruded outwards, so that the extrusion-molded gear can have complete teeth with better stroke, the condition that the forming teeth at partial positions are incomplete in the extrusion process is avoided, the forming efficiency of the extrusion gear is improved, and the qualification rate of the gear production is improved.

Drawings

FIG. 1 is a flow chart of a method of using the working mold of the present invention;

FIG. 2 is a first perspective view of the overall construction of the present invention;

FIG. 3 is an enlarged view of the structure at A in FIG. 2;

FIG. 4 is a second perspective view of the general construction of the present invention;

FIG. 5 is an enlarged view of the structure at B in FIG. 4;

FIG. 6 is a schematic view of the second slide bar and the pressing gear of the present invention;

FIG. 7 is a schematic view of the structure of the first slide bar and the arc gear of the present invention;

FIG. 8 is a third perspective view of the general construction of the present invention;

FIG. 9 is a fourth perspective view of the general structure of the present invention (hiding the second slide bar and pull cable);

fig. 10 is a schematic view of the structure of the first extrusion block and the second pressing block of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

the machining device comprises a machining table 1, a telescopic cylinder 2, a semi-arc-shaped plate 3, a first rotating shaft 4, a first connecting block 5, a first mounting ring 6, a one-way bearing 7, a first gear 8, an L-shaped rack 9, a first sliding chute 10, a first push rod 11, a first sliding rod 12, a second sliding chute 13, an arc-shaped gear 14, an L-shaped support 15, a second sliding rod 16, a pressing gear 17, a first connecting plate 18, a positioning inserted rod 19, a first baffle plate 20, a first spring 21, a positioning hole 22, an L-shaped connecting plate 23, a first guide block 24, a second guide block 25, a second connecting plate 26, a guide wheel 27, a pulling steel rope 28, an L-shaped supporting plate 29, a first electric cylinder 30, a columnar sleeve 31, a pushing column 32, a first extrusion block 33, an air spring 34, an arc-shaped sliding plate 35, a fixed strip 36, a second extrusion block 37 and a positioning baffle plate 38.

Detailed Description

Referring to fig. 1-10, the present invention provides a technical solution: a gear processing die comprises a processing table 1, wherein the top of the processing table is fixedly connected with two telescopic cylinders 2, the inner ends of the two telescopic cylinders 2 are fixedly connected with semi-arc plates 3, the bottom of the processing table 1 is rotatably connected with a first rotating shaft 4, the first rotating shaft 4 is fixedly connected with a first mounting ring 6 through two first connecting blocks 5, the bottom end of the first rotating shaft 4 is connected with a first gear 8 through a one-way bearing 7, the bottoms of the two semi-arc plates 3 are fixedly connected with L-shaped racks 9, a first chute 10 for the L-shaped racks 9 to slide transversely is arranged in the processing table 1, the two L-shaped racks 9 are meshed with the first gear 8, the top of the first mounting ring 6 is rotatably connected with a first push rod 11, the outer end of each first push rod 11 is rotatably connected with a first slide rod 12, a plurality of second chutes 13 for the first slide rods 12 to slide respectively are arranged in the processing table 1, the top end of each first slide rod 12 is fixedly connected with an arc gear 14, the plurality of arc gears 14 jointly form an extrusion forming gear, the plurality of arc gears 14 are all in contact with the inner side wall of the semi-arc plate 3, the top of the processing table 1 is fixedly connected with an L-shaped support 15, a second slide bar 16 in sliding connection with the L-shaped support 15 penetrates through the L-shaped support 15, the bottom end of the second slide bar 16 is fixedly connected with a pressing gear 17, the pressing gear 17 and the plurality of arc gears 14 at the bottom form the same gear shape, the top of the L-shaped support 15 is connected with a positioning mechanism for positioning the second slide bar 16, the top of the semi-arc plate 3 is connected with an opening mechanism, the opening mechanism is used for opening the positioning mechanism when the two semi-arc plates 3 are closed, and the top end of the second slide bar 16 is connected with a pulling mechanism for enabling the second slide bar 16 to move up and down;

the positioning mechanism comprises a first connecting plate 18, a positioning insertion rod 19 which is connected with the first connecting plate in a sliding mode penetrates through the first connecting plate 18, a first baffle 20 is fixedly connected to the rear end of the positioning insertion rod 19, a first spring 21 which is located between the first connecting plate 18 and the first baffle 20 is sleeved on the outer surface of the positioning insertion rod 19, and a positioning hole 22 for the positioning insertion rod 19 to insert is formed in the outer surface of the second sliding rod 16;

the opening mechanism comprises two L-shaped connecting plates 23, the two L-shaped connecting plates 23 are respectively and fixedly connected to the left side and the right side of the first baffle 20, the front side walls of the two L-shaped connecting plates 23 are respectively and fixedly connected with a first guide block 24, the tops of the two semi-arc plates 3 are respectively and fixedly connected with a second guide block 25, and the second guide blocks 25 are used for extruding the first guide blocks 24;

the pulling mechanism comprises two second connecting plates 26, the two second connecting plates 26 are fixedly connected to the left side and the right side of the first connecting plate 18 respectively, guide wheels 27 are rotatably connected to the front side walls of the two first connecting plates 18, pulling steel ropes 28 are fixedly connected to the top ends of the two second guide blocks 25, and the inner ends of the two pulling steel ropes 28 bypass the two guide wheels 27 on the same side of the two pulling steel ropes and are fixedly connected to the top ends of the second sliding rods 16 respectively;

when the device is needed to be used, the two telescopic cylinders 2 are in a retraction state to drive the two semi-arc plates 3 to be in an opening rotary table, the plurality of arc gears 14 are in a separation state, the second sliding rod 16 is positioned by the positioning mechanism, then, the material softened at high temperature is placed at the top of the processing table 1 and is positioned inside the plurality of opened arc gears 14, then, the two telescopic cylinders 2 are simultaneously started to drive the material and the fixedly connected semi-arc plates 3 to simultaneously move towards the middle position, when the two semi-arc plates 3 move inwards, the plurality of arc gears 14 are extruded, the arc gears 14 and the first sliding rod 12 move inwards along the second sliding groove 13, the plurality of arc gears 14 start to be slowly butted, the two L-shaped racks 9 are simultaneously driven to move, the L-shaped racks 9 drive the first gear 8 to rotate, and due to the action of the one-way bearing 7, the first gear 8 cannot drive the first rotating shaft 4 to rotate, the displacement deviation between the arc-shaped gear 14 driven by the first gear 8 at the bottom and the arc-shaped gear 14 pushed is avoided, the first gear 8 and the L-shaped rack 9 are prevented from being damaged, the arc-shaped gears 14 synchronously move inwards, softened materials are extruded forwards at the same time, the softened materials are gradually extruded into gears, when the two semi-arc-shaped plates 3 are moved inwards firstly, the second guide block 25 and the pull steel rope 28 at the top are driven to move inwards, the pull steel rope 28 is loosened, at the moment, the second slide bar 16 is positioned by the positioning inserted rod 19 and still cannot fall down directly, when the two second guide blocks 25 extrude the first guide block 24, the first guide block 24 and the L-shaped connecting plate 23 simultaneously move backwards, the two L-shaped connecting plates 23 drive the first baffle plate 20 and the positioning inserted rod 19 fixedly connected with the two L-shaped connecting plates to move backwards at the same time, and the positioning inserted rod 19 is slowly separated from the positioning hole 22 on the second slide bar 16, when the two semi-arc plates 3 are completely contacted and closed, the plurality of arc gears 14 form a complete gear shape, the softened gears are pressed and molded, at the moment, the positioning inserted rod 19 is driven to move out of the positioning hole 22, the second sliding rod 16 and the pressing gear 17 simultaneously slide downwards, the pressing gear 17 is consistent with the processed gears in shape, the pressing gear 17 rapidly falls under the action of gravity to extrude the softened materials extruded into the gear shape, the expanded position of the top door in extrusion is extruded, the softened materials can be more comprehensively contacted with the arc gears 14, the effect of the molded gear of each part is ensured, the top of the extruded gear can be kept in a horizontal state, after the gears are extruded and molded, the gears are cooled for a period of time, the two telescopic cylinders 2 begin to retract to drive the two semi-arc plates 3 to begin to move outwards, and the two L-shaped racks 9 reversely drive the first gear 8 to rotate, at this time, the one-way bearing 7 drives the first rotating shaft 4 to rotate, so that in the process of rapidly retracting the semi-arc plate 3, the first mounting ring 6 starts to rotate, the first push rod 11 drives the first sliding rod 12 to move outwards along the second sliding chute 13, the plurality of arc gears 14 are driven to start to move outwards and separate from the forming gear along the tooth direction of the forming gear, the interference between the arc gears 14 and the extrusion-formed gear when being opened is avoided, the forming effect of each tooth is ensured, meanwhile, the semi-arc plate 3 drives the second guide block 25 to separate from the first guide block 24, the positioning inserted rod 19 moves forwards under the action of the first spring 21, at this time, the steel rope 28 is pulled to drive the second sliding rod 16 to slide upwards, the second sliding rod 16 extrudes the positioning inserted rod 19, when the two semi-arc plates 3 return to the original position, the second sliding rod 16 is pulled to be completely reset, the positioning hole 22 on the outer surface of the second sliding rod 16 is contacted with the positioning inserted rod 19, the positioning inserted rod 19 positions the second sliding rod 16 again to complete one-time gear processing, so that when a processing mold is used for producing gears each time, the plurality of arc gears 14 are mutually butted to slowly extrude the softened material in the forward direction, and the outer surface of the softened material forms formed teeth, after the extrusion is completed, the second sliding rod 16 and the pressing gear 17 fall downwards by utilizing the pulling mechanism, the positioning mechanism and the opening mechanism to impact the extruded gears, the gears are completely extruded and molded, the partial position expansion of the gears in the extrusion process is avoided, the formed teeth of the gears are ensured to be in a good state, after the extrusion is completed, the plurality of arc gears 14 exit along the teeth of the gears, the interference between the processing mold and the teeth of the gears is avoided, the demolding is simpler and more convenient, and the qualified rate of the molding of the gears is improved.

As a further scheme of the present invention, the tops of the two second connecting plates 26 are fixedly connected with L-shaped supporting plates 29, the first electric cylinders 30 fixedly connected with the two L-shaped supporting plates 29 penetrate through the two L-shaped supporting plates 29, the bottoms of the extending ends of the two first electric cylinders 30 are fixedly connected with columnar sleeves 31, and the two columnar sleeves 31 are respectively sleeved on the outer surfaces of the two pulling steel ropes 28; in operation, after pressing gear 17 and impacting the gear, once impact probably can't flatten the material completely, through starting two first electric jar 30, make two first electric jar 30 do concertina movement, first electric jar 30 drives two first slide bars 12 of pulling cable 28 upper and lower pulling through cylindrical sleeve 31, make first slide bar 12 and pressing gear 17 round trip movement from top to bottom, make pressing gear 17 can strike extrusion's gear top many times, strike into the horizontality with the gear top, and make the gear extrude to the outside, make the complete tooth of stroke that extrusion's gear can be better, avoid the incomplete condition of partial position shaping tooth that appears among the extrusion process, improve the fashioned efficiency of extrusion gear, improve the qualification rate of production gear.

As a further scheme of the invention, a top moving column 32 slidably connected with the top moving column penetrates through the top of the processing table 1, the bottom ends of the two top moving columns 32 are fixedly connected with a first extrusion block 33, the bottom of the processing table 1 is fixedly connected with two gas springs 34, the inner ends of the two gas springs 34 are fixedly connected with arc-shaped sliding plates 35, the arc-shaped sliding plates 35 are used for being extruded by the first sliding rods 12 to slide outwards, fixed strips 36 are fixedly connected to the inner side walls of the two arc-shaped sliding plates 35, the bottoms of the two fixed strips 36 are fixedly connected with a second extrusion block 37, the second extrusion block 37 is used for extruding the first extrusion block 33, two positioning baffles 38 are fixedly connected to the bottom of the processing table 1, and the two positioning baffles 38 are respectively contacted with the rear ends of the front and rear fixed strips 36; when in work, the gear formed by the teeth is always contacted with the top of the processing table 1, after cooling, the formed gear may be adhered to the top of the processing table 1 and is not easy to be separated, when the first rotating shaft 4 is rotated after the extrusion molding, the first mounting ring 6, the first push rod 11 and the first slide bar 12 are moved outward, the first slide bar 12 extrudees the arc sliding plate 35 that uses first pivot 4 as the center, make the arc sliding plate 35 move to the outside, extrude gas spring 34, arc sliding plate 35 drives second extrusion piece 37 through fixed rectangular 36 and outwards moves, second extrusion piece 37 extrudes first extrusion piece 33, make first extrusion piece 33 drive and push up post 32 and upwards move, two push up post 32 and push up the shaping gear and move on the same phase simultaneously, make the shaping gear break away from the top of processing platform 1, be favorable to making the shaping gear break away from the processing position, make the shaping gear drawing of patterns convenient more fast.

the method comprises the following steps: firstly, the two telescopic cylinders 2 are in a retraction state, the two semi-arc plates 3 are driven to be in an opening rotary table, the plurality of arc gears 14 are in a separation state, and the second sliding rod 16 is positioned by a positioning mechanism;

step two: placing the high-temperature softened material on the top of the processing table 1 and positioning the material inside a plurality of opened arc gears 14;

step three: then, the two telescopic cylinders 2 are started simultaneously to drive the telescopic cylinders and the fixedly connected semi-arc plates 3 to move towards the middle position simultaneously, and when the two semi-arc plates 3 move inwards, the softened gear material is extruded and formed;

step four: after extrusion molding, the positioning mechanism is opened by the opening mechanism, the pulling mechanism is released, the second sliding rod 16 and the pressing gear 17 simultaneously slide downwards, the pressing gear 17 rapidly falls under the action of gravity, and extrusion is performed to extrude the gear;

step five: after the gear is extruded and formed, the gear is cooled for a period of time, the two telescopic cylinders 2 begin to retract, the first mounting ring 6 begins to rotate, the plurality of arc-shaped gears 14 are driven to start to move outwards, and the arc-shaped gears are separated from the formed gear along the tooth direction of the formed gear;

step six: the semi-arc plate passes through a pulling mechanism, the second slide bar 16 is pulled to be completely reset, the positioning hole 22 on the outer surface of the second slide bar 16 is in contact with the positioning inserted bar 19, the positioning inserted bar 19 positions the second slide bar 16 again, and one gear machining is completed.

Claims

1. The utility model provides a mold processing of gear, includes processing platform (1), its characterized in that: the machining device comprises a machining table (1), wherein the top of the machining table is fixedly connected with two telescopic cylinders (2), the inner ends of the two telescopic cylinders (2) are fixedly connected with a semi-arc-shaped plate (3), the bottom of the machining table (1) is rotatably connected with a first rotating shaft (4), the first rotating shaft (4) is fixedly connected with a first mounting ring (6) through two first connecting blocks (5), the bottom of the first rotating shaft (4) is connected with a first gear (8) through a one-way bearing (7), the bottom of the two semi-arc-shaped plates (3) is fixedly connected with an L-shaped rack (9), a first sliding chute (10) for the L-shaped rack (9) to transversely slide is formed in the machining table (1), the two L-shaped racks (9) are respectively meshed with the first gear (8), the top of the first mounting ring (6) is rotatably connected with a first push rod (11), and each first push rod (11) is rotatably connected with a first sliding rod (12), the processing table (1) is internally provided with a plurality of second sliding grooves (13) for the first sliding rods (12) to slide respectively, the top end of each first sliding rod (12) is fixedly connected with an arc-shaped gear (14), the arc-shaped gears (14) jointly form an extrusion forming gear, the arc-shaped gears (14) are in contact with the inner side wall of the semi-arc plate (3), the top of the processing table (1) is fixedly connected with an L-shaped support (15), a second sliding rod (16) in sliding connection with the L-shaped support (15) penetrates through the L-shaped support (15), the bottom end of the second sliding rod (16) is fixedly connected with a pressing gear (17), the pressing gear (17) is the same as the gear formed by the arc-shaped gears (14) at the bottom, the top of the L-shaped support (15) is connected with a positioning mechanism for positioning the second sliding rod (16), and the top of the semi-arc plate (3) is connected with an opening mechanism, the opening mechanism is used for opening the positioning mechanism when the two semi-arc plates (3) are closed, and the top end of the second sliding rod (16) is connected with a pulling mechanism used for enabling the second sliding rod (16) to move up and down.

2. The mold for machining a gear according to claim 1, wherein: positioning mechanism includes first connecting plate (18), first connecting plate (18) inside run through have rather than sliding connection's location inserted bar (19), location inserted bar (19) rear end fixedly connected with first baffle (20), the cover is equipped with on location inserted bar (19) surface and is located first connecting plate (18) and first baffle (20) between first spring (21), offer on second slide bar (16) surface and supply location inserted bar (19) male locating hole (22).

3. The mold for machining a gear according to claim 2, wherein: the opening mechanism comprises two L-shaped connecting plates (23) and two L-shaped connecting plates (23) which are respectively fixedly connected to the left side and the right side of a first baffle (20) and two first guide blocks (24) which are fixedly connected to the front side wall of each L-shaped connecting plate (23) and two second guide blocks (25) which are fixedly connected to the top of each semi-arc-shaped plate (3), and the second guide blocks (25) are used for extruding the first guide blocks (24).

4. A machining die for a gear according to claim 3, wherein: pulling mechanism includes two second connecting plates (26), two second connecting plate (26) fixed connection respectively is in the left and right sides of first connecting plate (18), two all rotate on first connecting plate (18) preceding lateral wall and be connected with leading wheel (27), two the equal fixedly connected with in second guide block (25) top pulls steel cable (28), two pulling steel cable (28) the inner is walked around respectively rather than two leading wheels (27) and fixed connection of homonymy on the top of second slide bar (16).

5. The mold for machining a gear according to claim 4, wherein: two equal fixedly connected with L type backup pad (29) in second connecting plate (26) top, two inside first electric jar (30) rather than fixed connection of all running through of L type backup pad (29), two the end bottom fixedly connected with column sleeve (31) that stretches out of first electric jar (30), two column sleeve (31) are established respectively and are established two on pulling steel cable (28) surface.

6. The mold for machining a gear according to claim 1, wherein: the top of the processing table (1) is penetrated with a top moving column (32) which is connected with the processing table in a sliding way, the bottom ends of the two top moving columns (32) are fixedly connected with a first extrusion block (33), the bottom of the processing table (1) is fixedly connected with two gas springs (34), the inner ends of the two gas springs (34) are fixedly connected with arc-shaped sliding plates (35), the arc-shaped sliding plates (35) are extruded by the first sliding rods (12) to slide outwards, the inner side walls of the two arc-shaped sliding plates (35) are fixedly connected with fixed strips (36), the bottoms of the two fixed strips (36) are fixedly connected with second extrusion blocks (37), the second extrusion piece (37) is used for extruding the first extrusion piece (33), two positioning baffle plates (38) are fixedly connected to the bottom of the processing table (1), and the two positioning baffle plates (38) are respectively contacted with the rear ends of the front fixed strip (36) and the rear fixed strip (36).

7. A method for processing a gear processing mold, which is suitable for the gear processing mold of any one of claims 1 to 6, and is characterized in that: the processing method comprises the following specific steps:

the method comprises the following steps: firstly, the two telescopic cylinders (2) are in a retraction state to drive the two semi-arc plates (3) to be in an opening rotary table, the plurality of arc gears (14) are in a separation state, and the second sliding rod (16) is positioned by a positioning mechanism;

step two: placing the material softened at high temperature into the top of the processing table (1) and positioning the material inside a plurality of opened arc gears (14);

step three: then, simultaneously starting the two telescopic cylinders (2) to drive the telescopic cylinders and the fixedly connected semi-arc plates (3) to simultaneously move towards the middle position, and extruding and forming the softened gear material when the two semi-arc plates (3) move inwards;

step four: after extrusion molding, the positioning mechanism is opened by the opening mechanism, the pulling mechanism is released, the second sliding rod (16) and the pressing gear (17) simultaneously slide downwards, the pressing gear (17) rapidly falls under the action of gravity, and extrusion is performed to extrude the gear;

step five: after the gear is extruded and formed, the gear is cooled for a period of time, the two telescopic cylinders (2) begin to retract, the first mounting ring (6) begins to rotate, the plurality of arc-shaped gears (14) are driven to start to move outwards, and the arc-shaped gears are separated from the formed gear along the tooth direction of the formed gear;

step six: the semi-arc-shaped plate passes through a pulling mechanism, the second sliding rod (16) is pulled to be completely reset, the positioning hole (22) in the outer surface of the second sliding rod (16) is in contact with the positioning insertion rod (19), the positioning insertion rod (19) positions the second sliding rod (16) again, and one-time gear machining is completed.