CN201100144Y

CN201100144Y - High curvature special high-temperature bending tube

Info

Publication number: CN201100144Y
Application number: CNU2007200447877U
Authority: CN
Inventors: 丁红军; 孙晓红; 王启权; 李东海; 上官红; 袁永生
Original assignee: Nanjing Chenguang Group Co Ltd
Current assignee: Nanjing Chenguang Group Co Ltd
Priority date: 2007-11-09
Filing date: 2007-11-09
Publication date: 2008-08-13
Anticipated expiration: 2017-11-09

Abstract

The utility model relates to a large curvature special type high temperature angle pipe, which belongs to a pipe fitting part connecting piece and is characterized in that the angle pipe is composed of two semiring structures (1,2) which are welded on a central line. The angle pipe of the utility model can be manufactured through a method which combines mechanical machining and welding and can save the production cost for twenty thousands RMB compared with other methods such as stamp forging and the like.

Description

The special type high temperature of deep camber bend pipe

Technical field

The utility model relates to a kind of mechanical fastener, especially a kind of bridge piece, the special type high temperature of specifically a kind of deep camber bend pipe.

Background technique

Certain model GTPU (Gas Turbine Power Unit) outlet pipe is because the restriction of installing space on the bullet, need produce external diameter is 28mm, bending radius is the refractory metal bend pipe (see figure 1) of 28mm, bending radius can't be carried out bending by existing angle pipe equipment much smaller than QJ918-85 guiding-tube bend radius standard-required.And by die forging method, manufacture cost is too high.

Summary of the invention

The purpose of this utility model is that to cross small curve at existing exhaust fitting bending radius excessive and make the problem of difficulty, designs the special type high temperature of a kind of deep camber bend pipe.

The technical solution of the utility model is:

The special type high temperature of a kind of deep camber bend pipe is characterized in that it is welded at the position of center line place by two semi-loops (1,2).

The caliber of high temperature bend pipe of the present utility model is identical with the center line bending radius, and curvature is greater than 1/28.

The beneficial effects of the utility model:

Bend pipe structure of the present utility model can process with the method that welding combines by machining, and additive methods such as relative die forging can be saved about 20,000 yuan of manufacture cost.

Description of drawings

Fig. 1 is a dimensional structure schematic representation of the present utility model.

Fig. 2 is the perspective view of Fig. 1.

Fig. 3 is course of working schematic representation of the present utility model.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described.

As shown in Figure 1, 2.

The special type high temperature of a kind of deep camber bend pipe, it is welded in center line 3 positions by two

semi-loops

1,2, and as shown in Figure 2, caliber is identical with the center line bending radius, and curvature is greater than 1/28, and concrete size is as shown in Figure 1.

Below in conjunction with concrete manufacture process the utility model is further described.

In order to produce the elbow of size shown in Figure 1, the utility model has adopted the method for machining and solder bond, and it can guarantee that bend pipe than under the small-bend radius, reduces production costs greatly.

Because of whole annulus can't be realized with machining, so adopt digital control processing cylinder blank is processed into whole semicircular ring: semi-ring face at first processing, process outer semi-ring face then, the actual man-hour inside and outside semicircular ring of adding is processed respectively and is joined and form because of the interference of cutter is divided into upper and lower two 1/4 anchor rings again, inside and outside anchor ring processes the back and adopts the line cutting process to cut the technology chuck, promptly is processed into a more than half annulus.Utilize the line cutting that large circle is cut into 6 half then, welding at last forms the hot properties bend pipe.

The processing difficulties of the inside and outside anchor ring of this part select except that cutter and the clamping difficulty, have also that bending radius is little, cutter relieving serious, wall thickness causes wall thickness situation more rambunctious.Must select the assurance quality of processing for use by rational processing arrangement, cutting parameter, reach technical requirement.

The blank of part is selected for use: diameter is 90mm, and length is 30mm, and material is stainless steel 1Cr18Ni9Ti, because spherical parts adds difficult clamping in man-hour, has reserved the technology chuck when considering charge length.

The processing of semi-ring face at first carrying out.(Fig. 3 a) processes on turning center Q51 and carries out.With the three-jaw clamping, jumping through rings face intermediate hole is to φ 22, and boring anchor ring intermediate hole carries out inner ring surface processing then to φ 26.Because of bending radius little, upper and lower two 1/4 anchor rings are processed with common boring cutter, easily produce and interfere, and the interference situation is just in time opposite, Selection of Cutting is particularly important: the end face groove cutter HFHR20-60-4T25 that roughing has selected for use ISCAR company to produce, cemented carbide tip width 4mm can realize processing simultaneously whole semicircular ring.It is the coated carbides bulb blade HFPR-4020 of the ISCAR of 4mm that diameter has been selected in fine finishing for use, and twice accurately machined cutting parameter is as follows: surplus is 0.50mm,, 600 rev/mins of rotating speeds, 0.1 millimeter/commentaries on classics of the amount of feed.

Carry out the processing (Fig. 3 b) of outer semi-ring face then, processing is carried out on turning center Q51.With technology chuck location, the soft pawl clamping of containment type, whole semicircular ring is processed respectively because of the interference of cutter is divided into upper and lower two 1/4 anchor rings, and selects two different cutters to process.The ISCAR billmpse tool that upper half part annulus has been selected for use.Lower half portion annulus has been selected the boring cutter S12M-SCLCR-06 of ISCAR for use, and twice accurately machined cutting parameter of upper half part annulus is as follows: surplus is 0.10mm,, 500/800 rev/min of rotating speed, amount of feed 0.12/0.06 millimeter/commentaries on classics; Twice accurately machined cutting parameter of lower half portion annulus is as follows: surplus is 0.10mm,, 500/600 rev/min of rotating speed, amount of feed 0.15/0.16 millimeter/commentaries on classics;

For preventing part deformation, adopt the line cutting process to cut the technology chuck, see Fig. 3 c.

Vehicle Processing welding chamfering.

Adopt the line cutting process that whole semicircular ring among Fig. 3 c is cut into 6 half, promptly be cut into 6 half bend pipes, see Fig. 3 d.

At last 2 half bend pipe welding are formed 1 hot properties bend pipe, see shown in Figure 2.

The utility model does not relate to the part prior art that maybe can adopt all same as the prior art to be realized.

Claims

1, the special type high temperature of a kind of deep camber bend pipe is characterized in that it is welded at the position of center line place by two semi-loops (1,2).

2, the special type high temperature of deep camber according to claim 1 bend pipe is characterized in that its caliber is identical with the center line bending radius.

3, the special type high temperature of deep camber according to claim 1 bend pipe is characterized in that its curvature is greater than 1/28.