CN109570912A - Titanium alloy ring rolling and bulging combined shaping method - Google Patents

Titanium alloy ring rolling and bulging combined shaping method Download PDF

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Publication number
CN109570912A
CN109570912A CN201710913133.1A CN201710913133A CN109570912A CN 109570912 A CN109570912 A CN 109570912A CN 201710913133 A CN201710913133 A CN 201710913133A CN 109570912 A CN109570912 A CN 109570912A
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CN
China
Prior art keywords
bulging
ring
blank
diameter
initial
Prior art date
Application number
CN201710913133.1A
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Chinese (zh)
Inventor
魏志坚
杜常鹏
刘柱柱
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贵州安大航空锻造有限责任公司
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Priority to CN201710913133.1A priority Critical patent/CN109570912A/en
Publication of CN109570912A publication Critical patent/CN109570912A/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23POTHER WORKING OF METAL; 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 invention discloses a kind of titanium alloy ring rolling and bulging combined shaping methods, it is characterized in that, pass through the design to rolling blank and bulging blank, and the accurate control of rolling and Bulging Process, overcome precision existing in the prior art low, or stock utilization is not high, the deficiency of performance difference is prepared for the titanium alloy ring met the requirements.This titanium alloy ring preparation method is mainly used for the forming of the titanium alloy ring in the fields such as Aeronautics and Astronautics, industrial machinery.

Description

Titanium alloy ring rolling and bulging combined shaping method

Technical field

The present invention relates to a kind of manufacturing process of ring, more particularly to titanium alloy ring rolling and bulging combined shaping Method.

Background technique

The production of ring at present is generally using the forming of the method for looping mill rolling direct forming or looping mill rolling+cutting or the rigid mould bulging of ring billet Such ring.Using looping mill rolling method direct forming abnormity ring when, when special-shaped ring uniform wall thickness formed thereby, roll and ring There is no stable contact surface between base, this will be so that roll off process be difficult to continue progress, and forming ring precision is also difficult to meet boat Empty space flight requirement.Looping mill rolling+cutting method is to first pass through looping mill rolling forming rectangle ring, then meet shape by numerical control cutting acquisition The special-shaped ring that size requires;On the one hand to reduce ring performance, on the other hand cutting destroys metal streamline to this method Cause expensive titanium alloy material utilization rate extremely low.

The method of the rigid mould bulging of ring billet, as " rectangular titanium alloy is rolled for the Chinese invention patent of Publication No. 102489596A The method that part Thermal expansion is configured to special-shaped ring " proposes a kind of rigid mould bulging process of use for rectangular titanium alloy base bulging Forming accuracy is improved since the ring precision of this method forming is guaranteed by expanding die as the method for Conical ring.The party Method needs high-precision, high performance looping mill rolling part as blank, which does not disclose the design and and manufacturing process of blank.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of looping mill rolling and the combined shaping methods of bulging, overcome the prior art Present in precision it is low or stock utilization is not high, the deficiency of performance difference.

In order to solve the above technical problems, titanium alloy ring rolling of the present invention and bulging combined shaping method, technology Scheme the following steps are included:

Step 1: determining bulging blank outer diameter RZ, bulging blank internal diameter rz, bulging blank height hz, initial blank internal diameter r0, initial blank axial height h0With initial blank outer diameter R0

Bulging process blank is calculated according to the ring size not finished, the ring wall thickness that do not finish is bf, The minimum outer diameter for not finishing ring is Rfmin, maximum outside diameter Rfmax, it is described do not finish ring thickness of shell 1/2 at Axial length is lf;The bulging process blank is thin-wall rectangular ring, wall thickness bz, it is highly hz, outer diameter Rz, internal diameter is rz;Bulging process blank dimension calculation formula are as follows:

The outer diameter of the blank: Rz=Rfmin, R in formulazFor blank outer diameter, RfminFor ring maximum outside diameter;

The height of the blank: hz=lf, h in formulazFor blank height, lfNot finish ring thickness of shell 1/2 at Axial length;

The internal diameter of the blank:R in formulazFor blank internal diameter, RzFor blank outer diameter, bf Not finish ring wall thickness, RfmaxFor ring maximum outside diameter;

SettingThe then axial height reduction: Δ h=h0Δb2, Δ h is axial height contracting in formula Decrement, r0For initial blank internal diameter, R1For home roll radius, R2For core roller radius, h0For initial blank axial height, Δ b is initial The total reduction amount of blank wall thickness;

It is above-mentioned it is found that initial blank outer diameter:

Initial blank height:

Further according to isometric principle, initial blank internal diameter is calculated;

Step 2: formula according to the relationships, calculates each size of initial blank, to prepare initial blank;

Step 3: obtained initial blank is configured to bulging blank by Ring Rolling;The outer diameter of the blank is Rz, Wall thickness is bz, axial height hz

30 DEG C of transformation temperature or more are heated to step 4: bulging blank is put into heating furnace, after keeping the temperature a period of time, is packed into Rigid mould bulging punch-pin periphery carries out bulging, and die core axle moves down under press machine effect in Bulging Process, to make punch-pin Block, which radially moves horizontally, is pressed into blank in cavity plate, shapes ring;Bulging Process is divided into three times, by ring after the completion of each bulging Part is rotated by 90 ° progress bulging next time, and distributes each bulging amount by ring maximum outside diameter after each bulging of control.Ring The initial maximum outer diameter of part is Rz, the maximum outside diameter of ring is R after the completion of first time bulging1;Ring is rotated by 90 ° carry out second Secondary bulging, ring maximum outside diameter is R after the completion of second of bulging2, worst be rotated by 90 ° ring carries out third time bulging, by ring Part bulging is to final size, maximum outside diameter Rfmax;Three times when bulging, the direction of rotation of ring is identical;

Each bulging time is 10~20s, and ring is rotated by 90 ° after completing bulging, then to ring pressure maintaining 30s.

The maximum outside diameter of ring after the completion of the first time bulging are as follows:

The maximum outside diameter of ring after the completion of second of bulging are as follows:

Compared with prior art, beneficial effects of the present invention are as follows:

Titanium alloy ring rolling and bulging combined shaping method of the present invention can get height in conjunction with rigid mould expanding method The technical advantage of precision, propose a kind of difficult wrought titanium alloy uniform thickness thin wall special-shaped ring rolls swollen combined shaping method.This method Thin-wall rectangular ring is obtained by looping mill rolling first, high-precision uniform thickness thin wall special-shaped ring is then obtained by rigid mould bulging.

Since present invention employs above-mentioned technical proposal, initial blank is after Ring Rolling obtains thin-wall rectangular ring through rigid Mould bulging obtains thin wall special-shaped ring, and whole flow process is only added in terminal stage by cutting removal mainly by materials plastic forming Spare time amount.Using rigid mould bulging when final forming abnormity ring, the final geometry and size of ring are guaranteed by mold.

Detailed description of the invention

Invention is further described in detail with reference to the accompanying drawings and detailed description.

Fig. 1 is the rigid mould Thermal expansion die drawing of titanium alloy thin wall abnormity ring.

Specific embodiment

Implement titanium alloy ring rolling and bulging combined shaping method of the present invention and needs to provide forge furnace, pressure The equipment such as power machine, machine for rolling ring, manipulator.The specific reality of this method is described in detail so that the trade mark is the titanium alloy of TC4 as an example below Apply mode:

The main chemical elements content (weight percent) of the alloy are as follows: amount containing Al 5.5%~6.8%, V content 3.5% ~4.5%, amount containing Fe≤0.30%, C content≤0.10%, leaded wastewater≤0.05%, amount containing H≤0.015%, amount containing O≤ 0.20%, other elements it is single≤0.10% and summation≤0.40%, surplus Ti.

The step of this method, is as follows:

Step 1: determining bulging blank outer diameter RZ, bulging blank internal diameter rz, bulging blank height hz, initial blank internal diameter r0, initial blank axial height h0With initial blank outer diameter R0

Bulging process blank is calculated according to the ring size not finished, the ring wall thickness that do not finish is bf, The minimum outer diameter for not finishing ring is Rfmin, maximum outside diameter Rfmax, it is described do not finish ring thickness of shell 1/2 at Axial length is lf;The bulging process blank is thin-wall rectangular ring, wall thickness bz, it is highly hz, outer diameter Rz, internal diameter is rz;Bulging process blank dimension calculation formula are as follows:

The outer diameter of the blank: Rz=Rfmin, R in formulazFor blank outer diameter, RfminFor ring maximum outside diameter;

The height of the blank: hz=lf, h in formulazFor blank height, lfNot finish ring thickness of shell 1/2 at Axial length;

The internal diameter of the blank:R in formulazFor blank internal diameter, RzFor blank outer diameter, bf Not finish ring wall thickness, RfmaxFor ring maximum outside diameter;

SettingThe then axial height reduction: Δ h=h0Δb2, Δ h is axial height contracting in formula Decrement, r0For initial blank internal diameter, R1For home roll radius, R2For core roller radius, h0For initial blank axial height, Δ b is initial The total reduction amount of blank wall thickness;

It is above-mentioned it is found that initial blank outer diameter:

Initial blank height:

Further according to isometric principle, initial blank internal diameter is calculated;

Step 2: formula according to the relationships, calculates each size of initial blank, to prepare initial blank;

Step 3: obtained initial blank is configured to bulging blank by Ring Rolling;The outer diameter of the blank is Rz, Wall thickness is bz, axial height hz

Step 4: as shown in Figure 1.Bulging blank is put into heating furnace and is heated to 30 DEG C of transformation temperature or more, keeps the temperature one section After time, packing into rigid mould bulging punch-pin periphery and carry out bulging, die core axle moves down under press machine effect in Bulging Process, Blank is pressed into cavity plate to make convex module radially move horizontally, shapes ring;Bulging Process is divided into three times, each bulging Ring is rotated by 90 ° progress bulging next time after the completion, and each to distribute by ring maximum outside diameter after controlling each bulging Bulging amount.The initial maximum outer diameter of ring is Rz, the maximum outside diameter of ring is R after the completion of first time bulging1;Ring is rotated 90 ° of progress, second of bulging, ring maximum outside diameter is R after the completion of second of bulging2, worst that ring is rotated by 90 ° carry out third Secondary bulging, by ring bulging to final size, maximum outside diameter Rfmax;Three times when bulging, the direction of rotation of ring is identical;

Each bulging time is 10~20s, and ring is rotated by 90 ° after completing bulging, then to ring pressure maintaining 30s.

The maximum outside diameter of ring after the completion of the first time bulging are as follows:

The maximum outside diameter of ring after the completion of second of bulging are as follows:

Claims (3)

1. a kind of titanium alloy ring rolling and bulging combined shaping method, which comprises the following steps:
Step 1: determining bulging blank outer diameter RZ, bulging blank internal diameter rz, bulging blank height hz, initial blank internal diameter r0, it is initial Blank axial height h0With initial blank outer diameter R0
Bulging process blank is calculated according to the ring size not finished, the ring wall thickness that do not finish is bf, non-finishing The minimum outer diameter of work ring is Rfmin, maximum outside diameter Rfmax, it is described do not finish ring thickness of shell 1/2 at axial direction it is long Degree is lf;The bulging process blank is thin-wall rectangular ring, wall thickness bz, it is highly hz, outer diameter Rz, internal diameter rz;Bulging Technique blank dimension calculation formula are as follows:
The outer diameter of the blank: Rz=Rfmin, R in formulazFor blank outer diameter, RfminFor ring maximum outside diameter;
The height of the blank: hz=lf, h in formulazFor blank height, lfThe axis at 1/2 not finish ring thickness of shell To length;
The internal diameter of the blank:R in formulazFor blank internal diameter, RzFor blank outer diameter, bfFor not Finish ring wall thickness, RfmaxFor ring maximum outside diameter;
SettingThe then axial height reduction: Δ h=h0Δb2, Δ h is axial height reduction in formula, r0For initial blank internal diameter, R1For home roll radius, R2For core roller radius, h0For initial blank axial height, Δ b is initial blank The total reduction amount of wall thickness;
It is above-mentioned it is found that initial blank outer diameter:
Initial blank height:
Further according to isometric principle, initial blank internal diameter is calculated;
Step 2: formula according to the relationships, calculates each size of initial blank, to prepare initial blank;
Step 3: obtained initial blank is configured to bulging blank by Ring Rolling;The outer diameter of the blank is Rz, wall thickness is bz, axial height hz
30 DEG C of transformation temperature or more are heated to step 4: bulging blank is put into heating furnace, after keeping the temperature a period of time, packs into rigid mould Bulging punch-pin periphery carries out bulging, and die core axle moves down under press machine effect in Bulging Process, to make convex module edge Radial level is mobile to be pressed into blank in cavity plate, shapes ring;Bulging Process is divided into three times, revolves ring after the completion of each bulging Turn 90 ° and carry out bulging next time, and distributes each bulging amount by ring maximum outside diameter after each bulging of control.Ring Initial maximum outer diameter is Rz, the maximum outside diameter of ring is R after the completion of first time bulging1;It is swollen for the second time that ring is rotated by 90 ° progress Shape, ring maximum outside diameter is R after the completion of second of bulging2, worst be rotated by 90 ° ring carries out third time bulging, and ring is swollen Shape is to final size, maximum outside diameter Rfmax;Three times when bulging, the direction of rotation of ring is identical;
Each bulging time is 10~20s, and ring is rotated by 90 ° after completing bulging, then to ring pressure maintaining 30s.
2. titanium alloy ring rolling according to claim 1 and bulging combined shaping method, which is characterized in that described first The maximum outside diameter of ring after the completion of secondary bulging are as follows:
3. titanium alloy ring rolling according to claim 1 and bulging combined shaping method, which is characterized in that described second The maximum outside diameter of ring after the completion of secondary bulging are as follows:
CN201710913133.1A 2017-09-29 2017-09-29 Titanium alloy ring rolling and bulging combined shaping method CN109570912A (en)

Priority Applications (1)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710913133.1A CN109570912A (en) 2017-09-29 2017-09-29 Titanium alloy ring rolling and bulging combined shaping method

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102489596A (en) * 2011-11-24 2012-06-13 贵州安大航空锻造有限责任公司 Hot bulging method for forming rectangular titanium alloy rolled ring into special-shaped ring
CN105033125A (en) * 2015-06-08 2015-11-11 西北工业大学 Titanium alloy equal-thickness thin-wall special-shaped annular piece rolling and expanding composite forming method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102489596A (en) * 2011-11-24 2012-06-13 贵州安大航空锻造有限责任公司 Hot bulging method for forming rectangular titanium alloy rolled ring into special-shaped ring
CN105033125A (en) * 2015-06-08 2015-11-11 西北工业大学 Titanium alloy equal-thickness thin-wall special-shaped annular piece rolling and expanding composite forming method

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