CN106862449A - The closed die forging forging method of complete-section tunnel boring machine hobboing cutter cutter ring - Google Patents

The closed die forging forging method of complete-section tunnel boring machine hobboing cutter cutter ring Download PDF

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Publication number
CN106862449A
CN106862449A CN201710123856.1A CN201710123856A CN106862449A CN 106862449 A CN106862449 A CN 106862449A CN 201710123856 A CN201710123856 A CN 201710123856A CN 106862449 A CN106862449 A CN 106862449A
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China
Prior art keywords
forging
complete
boring machine
tunnel boring
section tunnel
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Application number
CN201710123856.1A
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Chinese (zh)
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CN106862449B (en
Inventor
张凌
黄石起
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Lingyuan Technology Co ltd
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Equipment Ltd Wei Erte Tunnel Jilin Province
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Publication of CN106862449A publication Critical patent/CN106862449A/en
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Publication of CN106862449B publication Critical patent/CN106862449B/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/02Die forging; Trimming by making use of special dies ; Punching during forging
    • B21J5/025Closed die forging
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J1/00Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
    • B21J1/06Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00Details of machines for forging, pressing, or hammering
    • B21J13/02Dies or mountings therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass

Abstract

The closed die forging forging method of complete-section tunnel boring machine hobboing cutter cutter ring of the present invention, belong to technical field of forging, solve prior art presence forging precision it is low, processing capacity is big, surface quality is poor, cannot accurately control metal flow direction, relatively low forging interior tissue density, low production efficiency and the low technical problem of stock utilization;The present invention is comprised the following steps:Annular materials in the tube are chosen as blank material;Inner surface and outer surface to blank material carry out turning, remove surface scale, and top edge and lower edge to blank material carries out chamfer machining;Blank material is fitted into closed molds, forge for the first time;Blank is forged for the second time;Take out forging;Forging after forging is carried out into isothermal spheroidizing treatment, hobboing cutter cutter ring forging is obtained.

Description

The closed die forging forging method of complete-section tunnel boring machine hobboing cutter cutter ring
Technical field
The invention belongs to technical field of forging, and in particular to a kind of closed die forging of complete-section tunnel boring machine hobboing cutter cutter ring Forging method.
Background technology
Hobboing cutter cutter ring is the vital part of complete-section tunnel boring machine construction, in complete-section tunnel boring machine tunneling process Hobboing cutter cutter ring and rock mass directly contact, under longitudinal thrust effect, are extruded rock, that crack initiation is finally completed is right by cutter ring Rock it is broken, its condition of work is extremely severe, so hobboing cutter cutter ring occurs following failure mode in tunneling process:Anon-normal Normal abrasion, crimping, tipping and fracture.In order to prevent and reducing above-mentioned failures, it is desirable to which cutter ring has high rigidity, high abrasion The comprehensive mechanical properties such as property, impact flexibility high.
Influence the factor of hobboing cutter cutter ring performance a lot, mainly have:Raw material, forging technology, the annealing of forging blank and half Technology for Heating Processing of finished product etc..The forging technology that the hobboing cutter cutter ring of section tunnel boring machine is traditional is open die forging.But exist with Lower technological deficiency:Forging precision is low, processing capacity is big, surface is also easy to produce forging defect;Required metal cannot accurately be controlled Flow direction;It is difficult to accurate control terminal temperature;It is as excessive in entered hammer amount when pulling out in forging process, easily occur surface transversal crack, The transversal crack such as entered inside the too small easy appearance of hammer amount;Drafts is excessive or upset pulling number of times is excessive during forging chamfered edge, can make Into surface longitudinal and internal longitudinal crack;In a word, the factor of influence open die forging forging quality has various, and operating process is difficult to control System is accurate, so as to influence the quality of forging, has different degrees of influence to the performance of finished product cutter ring.
At present, the blank before the hobboing cutter cutter ring processing of complete-section tunnel boring machine uses open die forging or roll forging, forges Raw material be unlike material the ESR ingot round bar that processes of forging.There is following technological deficiency in open die forging or roll forging:
1st, open die forging and the forging precision of roll forging are low, processing capacity is big, surface quality is poor, low production efficiency, forging loss-rate are big, gold Category consumption is more;
2nd, during flat-die forging metal stock except it is upper and lower with template contacts part in addition to, other each and every one directions can not be by outside Limit and Free Transform flowing, therefore the metal required for cannot accurately controlling is flowed to;
3rd, after open die forging and roll forging because heating every time, cannot a forging and molding, need because being limited by final forging temperature Want the heating repeatedly and forging of 2--3 times, low production efficiency and heating and forging high cost;
4th, such as final forging temperature control is improper, it is easy to causes the microfissure of forging face crack and inside, has a strong impact on The inherent quality of forging;
5th, open die forging can only be forged with round bar, and the utilization rate of material is low, increase the material cost of part.
The content of the invention
It is an object of the invention to provide the closed die forging forging method of complete-section tunnel boring machine hobboing cutter cutter ring, solve existing With the presence of technology forging precision it is low, processing capacity is big, surface quality is poor, cannot accurately control metal flow to, forging interior tissue Density is relatively low, low production efficiency and the low technical problem of stock utilization.
To achieve the above object, the closed die forging forging method of complete-section tunnel boring machine hobboing cutter cutter ring of the present invention include with Lower step:
Step one:Annular materials in the tube are chosen as forging blank material;
Step 2:Turning is carried out to the inner surface of blank material chosen in step one and outer surface, surface scale is removed;
Step 3:Top edge and lower edge to the blank material of acquisition in step 2 carry out chamfer machining, the angle [alpha] of chamfering For:7 ° to 9 °.
Step 4:The blank material that will be obtained in step 3 is fitted into closed molds, is carried out for the first time using ten thousand tons of forcing presses Forge;
Step 5:To, by the blank for forging for the first time, being forged for the second time using ten thousand tons of forcing presses in step 4, Obtain forging;
Step 6:Closed molds are opened, forging is taken out;
Step 7:Forging in step 6 is carried out into isothermal spheroidizing, hobboing cutter cutter ring forging is obtained.
Remove the blank material of oxide skin in the step 2, external diameter and height press (5-6):1 carries out blanking.
The temperature for carrying out forging for the first time in the step 4 is 1100 DEG C, and pressure is 4000-4500 tons.
The temperature forged for the second time to blank in the step 5 is less than 1100 DEG C, more than or equal to 1050 DEG C, pressure Power is 8000-8500 tons.
Closed molds in the step 4 include upper die and lower die, three guide posts;Pressing plate, top board, three push rods and bullet Spring;Pressing plate is connected by screw with top board;Push rod is synchronized with the movement with top board;Three push rod circumference uniform distributions are arranged on lower mould;One One push rod of individual guide post correspondence, with lower mould for screw thread is linked, spring housing is on push rod for guide post.
Knuckle between the upper die and lower die end and blade is R24.
The blade gradient of the upper mould is 8 degree of one side.
The blade gradient of the lower mould is 8 degree of one side.
Used as positioning and guiding, the gap of positioning and guiding is 1mm for the outward flange of the upper die and lower die die cavity.
Advantageous Effects of the invention:1st, the present invention uses closed die forging method, and blank is lower good using annular materials in the tube Turning is carried out to inner and outer surfaces after material, the defects such as raw material surface scale are machined away, with annular materials in the tube than conventional pole Material substantially increases the utilization rate of material, reduces material cost and processing cost;
2nd, whole forging process need to only control initial forging temperature and final forging temperature, and initial forging temperature is defined as 1100 DEG C, end Forging range is strict controlled in≤50 DEG C by forging temperature control more than or equal to 1050 DEG C;Greatly shorten forging temperature model Enclose;Ensure that the forging blank of heating with the whole forging of completion in plasticity and less resistance of deformation temperature range higher Process, obtains tiny, uniform grain structure, improves forging mechanical performance, can fully control microstructure segregation, obtains densification Forging tissue, it is to avoid terminal temperature control is improper when open die forging or roll forging, causes the defects such as surface and underbead crack;
3rd, closed molds include upper die and lower die, and the ejecting structure of forging is designed in lower mould, using upper and lower model cavity outside Edge is designed as 1mm as positioning and guiding, guiding clearance, effectively prevent metal overflow, and be easy to die sinking;End and blade Knuckle is designed as R24, and blade gradient is designed as 8 degree of one side, it is ensured that the flow direction of metal and the degree of filling of die cavity;In design Metal flow direction and shaping of the blank in forging process are taken into full account, the workpiece blade after forging is strengthened consistency and mechanicalness Can, the influence principle flowed to tissue, performance etc. using the metal in forging process defines optimal die profile And each spot size;
4th, die forging is carried out using closed molds, the geometry of forging is completely similar to finished product, the design to forging blank Take into full account compactness, metal flow direction, utilization rate of material of forging interior tissue etc., be defined as in weight blank it is great in Finished product weight 2KG;Machine-finish allowance is reduced, not only improving stock utilization can also substantially reduce processing cost;
5th, forge number of times just formable twice using twice, i.e., need to only be forged to heating blank, using large-tonnage, forge twice Manual labour skill can improve dense structure's degree of forging, improve end properties;Mould can be safeguarded again simultaneously, mould is improved Service life;
6th, forging precision is low when forging method of the present invention avoids open die forging or roll forging using closed die forging technique, processing capacity Greatly, the forging defect that surface quality is poor, low production efficiency, the forging big metal consumption of loss-rate are more;And the sword of the hobboing cutter cutter ring for obtaining The tissue density in portion is higher than the tissue density of end.
Brief description of the drawings
Fig. 1 is the flow chart of the closed die forging forging method of complete-section tunnel boring machine hobboing cutter cutter ring of the present invention;
Fig. 2 is the blank forging gold in the closed die forging forging method of complete-section tunnel boring machine hobboing cutter cutter ring of the present invention Category flows to schematic diagram;
Fig. 3 is the closed molds structure in the closed die forging forging method of complete-section tunnel boring machine hobboing cutter cutter ring of the present invention Schematic diagram;
Wherein, 1, lower mould, 2, upper mould, 3, push rod, 4, spring, 5, pressing plate, 6, top board, 7, guide post, 8, end and blade Between knuckle, 9, blade gradient.
Specific embodiment
The present invention is further elaborated below in conjunction with the accompanying drawings.
Referring to accompanying drawing 1, accompanying drawing 2 and accompanying drawing 3, the closed die forging forging side of complete-section tunnel boring machine hobboing cutter cutter ring of the present invention Method is comprised the following steps:
Step one:Annular materials in the tube are chosen as forging blank material;
Step 2:Turning is carried out to the inner surface of blank material chosen in step one and outer surface, surface scale is removed;
Step 3:Top edge and lower edge to the blank material of acquisition in step 2 carry out chamfer machining, the angle [alpha] of chamfering For:7 ° to 9 °.
Step 4:The blank material that will be obtained in step 3 is fitted into closed molds, is carried out for the first time using ten thousand tons of forcing presses Forge;
Step 5:To, by the blank for forging for the first time, being forged for the second time using ten thousand tons of forcing presses in step 4, Obtain forging;
Step 6:Closed molds are opened, forging is taken out;
Step 7:Forging in step 6 is carried out into isothermal spheroidizing, hobboing cutter cutter ring forging is obtained.
Remove the blank material of oxide skin in the step 2, external diameter and height press (5-6):1 carries out blanking.
The temperature for carrying out forging for the first time in the step 4 is 1100 DEG C, and pressure is 4000-4500 tons.
The temperature forged for the second time to blank in the step 5 is less than 1100 DEG C, more than or equal to 1050 DEG C, pressure Power is 8000-8500 tons.
Closed molds in the step 4 include upper mould 2,1, three guide posts 7 of lower mould, pressing plate 5,6, three tops of top board Bar 3 and spring 4;Pressing plate 5 is connected by screw with top board 6;Three circumference uniform distributions of push rod 3 are arranged on lower mould 1;Each push rod 3 One guide post 7 of correspondence;Push rod 3 is synchronized with the movement with top board 6, and guide post 7 is with lower mould 1 for screw thread is linked;Spring 4 is enclosed within push rod 3 On.
Knuckle 8 between the upper mould 2 and the lower end of mould 1 and blade is R24.
The blade gradient of the upper mould 2 is 8 degree of one side.
The blade gradient 9 of the lower mould 1 is 8 degree of one side.
Used as positioning and guiding, guiding clearance is 1mm for the outward flange of the upper mould 2 and the lower die cavity of mould 1.
Specific embodiment two:
The difference of the present embodiment and embodiment one is that the external diameter of blank material and the ratio of height described in step one are: 5.8:1。
Specific embodiment three:
The difference of the present embodiment and embodiment one is that the external diameter of blank material and the ratio of height described in step one are: 5:1。
Specific embodiment four:
The difference of the present embodiment and embodiment one is that the external diameter of blank material and the ratio of height described in step one are: 6:1。
Specific embodiment five:
The present embodiment is that the angle [alpha] that the chamfer machining described in step 3 is processed is 8 ° with the difference of embodiment one.
Specific embodiment six:
The present embodiment is that the angle [alpha] that the chamfer machining described in step 3 is processed is 7 ° with the difference of embodiment one.
Specific embodiment seven:
The present embodiment is that the angle [alpha] that the chamfer machining described in step 3 is processed is 9 ° with the difference of embodiment one.
Specific embodiment eight:
The difference of the present embodiment and embodiment one is first time in step 4 to forge pressure to be defined as 4200 tons
Specific embodiment nine:
The difference of the present embodiment and embodiment one is first time in step 4 to forge pressure to be defined as 4000 tons.
Specific embodiment ten:
The difference of the present embodiment and embodiment one is first time in step 4 to forge pressure to be defined as 4500 tons.
Specific embodiment 11:
The difference of the present embodiment and embodiment one is that the pressure that forges for the second time in step 5 is defined as 8300 tons.
Specific embodiment 12:
The difference of the present embodiment and embodiment one is that the pressure that forges for the second time in step 5 is defined as 8000 tons.
Specific embodiment 13:
The difference of the present embodiment and embodiment one is that the pressure that forges for the second time in step 5 is defined as 8000 tons.

Claims (10)

1. the closed die forging forging method of complete-section tunnel boring machine hobboing cutter cutter ring, it is characterised in that comprise the following steps:
Step one:Annular materials in the tube are chosen as forging blank material;
Step 2:Turning is carried out to the inner surface of blank material chosen in step one and outer surface, surface scale is removed;
Step 3:Top edge and lower edge to the blank material of acquisition in step 2 carry out chamfer machining, and the angle [alpha] of chamfering is: 7 ° to 9 °;
Step 4:The blank material that will be obtained in step 3 is fitted into closed molds, carries out forging for the first time using ten thousand tons of forcing presses;
Step 5:To, by the blank for forging for the first time, being forged for the second time using ten thousand tons of forcing presses in step 4, obtain Forging;
Step 6:Closed molds are opened, forging is taken out;
Step 7:Forging in step 6 is carried out into isothermal spheroidizing, hobboing cutter cutter ring forging is obtained.
2. the closed die forging forging method of complete-section tunnel boring machine hobboing cutter cutter ring according to claim 1, its feature exists In, the blank material of oxide skin is removed in the step 2, external diameter and height press (5-6):1 carries out blanking.
3. the closed die forging forging method of complete-section tunnel boring machine hobboing cutter cutter ring according to claim 2, its feature exists In, the blank material of oxide skin is removed in the step 2, external diameter and height press 5.8:1 carries out blanking.
4. the closed die forging forging method of complete-section tunnel boring machine hobboing cutter cutter ring according to claim 1, its feature exists In the temperature for carrying out forging for the first time in the step 4 is 1100 DEG C, and pressure is 4000-4500 tons.
5. the closed die forging forging method of complete-section tunnel boring machine hobboing cutter cutter ring according to claim 4, its feature exists In the temperature for carrying out forging for the first time in the step 4 is 1100 DEG C, and pressure is 4300 tons.
6. the closed die forging forging method of complete-section tunnel boring machine hobboing cutter cutter ring according to claim 1, its feature exists In the temperature forged for the second time to blank in the step 5 is less than 1100 DEG C, and more than or equal to 1050 DEG C, pressure is 8000-8500 tons.
7. the closed die forging forging method of complete-section tunnel boring machine hobboing cutter cutter ring according to claim 6, its feature exists In the pressure forged for the second time to blank in the step 5 is 8300 tons.
8. the closed die forging forging method of complete-section tunnel boring machine hobboing cutter cutter ring according to claim 1, its feature exists In the closed molds in the step 4 include upper mould (2), lower mould (1), three guide posts (7), pressing plate (5), top board (6), three Individual push rod (3) and spring (4);Pressing plate (5) is connected by screw with top board (6);Three circumference uniform distributions of push rod 3 are arranged on lower mould 1 On, each push rod 3 one guide post 7 of correspondence;Push rod (3) is synchronized with the movement with top board (6);Guide post (7) is screw thread with lower mould (1) Link;Spring (4) is enclosed within push rod (3).
9. the closed die forging forging method of complete-section tunnel boring machine hobboing cutter cutter ring according to claim 8, its feature exists In the knuckle (8) of the upper mould (2) and lower mould (1) between end and blade is R24;The blade gradient of the upper mould (2) For 8 degree of one side;The blade gradient (9) of the lower mould (1) is 8 degree of one side.
10. the closed die forging forging method of complete-section tunnel boring machine hobboing cutter cutter ring according to claim 8, its feature exists In used as positioning and guiding, positioning and guiding gap is 1mm for the outward flange of the upper mould (2) and lower mould (1) die cavity.
CN201710123856.1A 2017-03-03 2017-03-03 The closed die forging forging method of complete-section tunnel boring machine hobboing cutter cutter ring Active CN106862449B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109732294A (en) * 2019-02-21 2019-05-10 嘉善鑫强钢业有限公司 A kind of shield machine cutter ring processing technology increasing intensity
CN113510208A (en) * 2020-04-09 2021-10-19 陕西长羽航空装备有限公司 Local die forging and rolling combined forming method for titanium alloy T-shaped section ring piece

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Publication number Priority date Publication date Assignee Title
CN109732294A (en) * 2019-02-21 2019-05-10 嘉善鑫强钢业有限公司 A kind of shield machine cutter ring processing technology increasing intensity
CN113510208A (en) * 2020-04-09 2021-10-19 陕西长羽航空装备有限公司 Local die forging and rolling combined forming method for titanium alloy T-shaped section ring piece

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Address after: No. 023, Chongqing Street, Yongji Economic Development Zone, Jilin City, Jilin Province, 132000

Patentee after: Lingyuan Technology Co.,Ltd.

Address before: No.023, Chongqing Street, Yongji Economic Development Zone, Jilin City, Jilin Province

Patentee before: JILIN WEIERTE TUNNEL EQUIPMENT CO.,LTD.