CN214816575U

CN214816575U - Special choke plug for turning bowl-shaped titanium alloy thin-wall part

Info

Publication number: CN214816575U
Application number: CN202120501305.6U
Authority: CN
Inventors: 杨凤; 张隆; 张武成; 徐兴国; 林彬彬; 何志国; 鲁航; 孙兆亮; 董礼涛
Original assignee: Harbin Turbine Co Ltd
Current assignee: Harbin Turbine Co Ltd
Priority date: 2021-03-09
Filing date: 2021-03-09
Publication date: 2021-11-23
Anticipated expiration: 2031-03-09

Abstract

A special choke plug for turning a bowl-shaped titanium alloy thin-wall part relates to a choke plug. The utility model discloses a solve present bowl form titanium alloy thin wall spare man-hour, because of the improper existence of clamping is difficult for guaranteeing dimensional tolerance problem, simultaneously, influence product appearance quality's problem because of the vibration. The utility model discloses a vexed head is the disc body, the lower terminal surface of disc body is the horizontal end face, the up end of disc body has outer cooperation circular bead and location circular bead to interior processing in proper order, cooperation circular bead and location circular bead are circular boss, the diameter of location circular bead is less than the diameter of cooperation circular bead, compare the horizontal end face of terminal surface under the disc body, the height that highly is less than the location circular bead of cooperation circular bead, a plurality of lightening holes have been seted up on the cooperation circular bead, the centre bore has been seted up on the location circular bead. The utility model is used for turning bowl form titanium alloy thin wall spare.

Description

Special choke plug for turning bowl-shaped titanium alloy thin-wall part

Technical Field

The utility model relates to a bulkhead, concretely relates to special bulkhead of turning bowl form titanium alloy thin wall spare belongs to machining frock technical field.

Background

The wall thickness of a seal head in a novel UV unit of a steam turbine is only 6Mm, the diameter is large, the maximum diameter is 500Mm, the seal head belongs to a typical thin-wall part, the shape of the seal head is similar to a bowl shape, and the seal head is made of titanium alloy which is difficult to machine (the specific structure is shown in figures 1 and 2).

Because the workpiece is made of special materials and has light weight, and meanwhile, the drawing and the process strictly require that no trace can exist on the surface of the workpiece on the premise of ensuring the dimensional tolerance and the geometric tolerance of the drawing. Therefore, when the spherical surface is turned, if the spherical surface is improperly clamped, the workpiece is stressed too much to deform, so that the dimensional tolerance of the workpiece is influenced, and meanwhile, the workpiece is vibrated in the machining process due to the thin wall of the workpiece, so that the appearance quality of the product is influenced.

In conclusion, when the existing bowl-shaped titanium alloy thin-wall part is machined, the problem that the dimensional tolerance is not easy to guarantee due to improper clamping exists, and meanwhile, the appearance quality of a product is influenced due to vibration.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that the existing bowl-shaped titanium alloy thin-wall part is difficult to guarantee the dimensional tolerance problem due to improper clamping, and simultaneously, the appearance quality of the product is influenced due to vibration. Further provides a special choke plug for turning the bowl-shaped titanium alloy thin-wall part.

The technical scheme of the utility model is that: the utility model provides a special vexed head of turning bowl form titanium alloy thin wall spare, the vexed head is the disc body, the lower terminal surface of disc body is the horizontal terminal surface, the up end of disc body has and has processed cooperation circular bead and location circular bead outward to interior in proper order, cooperation circular bead and location circular bead are circular boss, the diameter of location circular bead is less than the diameter of cooperation circular bead, compare in the horizontal terminal surface of disc body lower terminal surface, the height of cooperation circular bead is less than the height of location circular bead, a plurality of lightening holes have been seted up on the cooperation circular bead, the centre bore has been seted up on the location circular bead.

Further, a plurality of lightening holes are opened in an annular array on the mating shoulder.

Further, the number of the lightening holes is 6-12.

Further, the diameter of the disc-shaped body is 500 mm.

Further, the height difference between the mating shoulder and the positioning shoulder is 5 mm.

Further, the height of the circular boss of the mating shoulder is 15 mm.

Further, the diameter of the lightening hole is 40 mm.

Further, the diameter of the central hole was 60 mm.

Compared with the prior art, the utility model has the following effect:

1. the utility model discloses a vexed head not only plays the supporting role to the inner wall of work piece (indicating bowl form titanium alloy thin wall spare), has the effect of avoiding the radial deformation of work piece in addition. Meanwhile, the thickness of the workpiece can be increased, the rigidity of the workpiece is improved, resonance generated in the machining process of the workpiece is eliminated, the appearance quality of the product is improved, and the machined workpiece meets the design requirement of the product.

2. The utility model provides a weight of vexed head not only can be alleviateed in the design of lightening hole, can also effectually avoid vexed head weight too heavy, and the use can cause the too big problem that produces the deformation of work piece inner wall napping and work piece atress.

3. The utility model provides a lightening hole can also be used as the hole for hoist and mount usefulness, reduces the vexed head dismouting number of times and leads to the work piece to warp (the dismouting is more frequent more easy to draw hair and warp), influences work piece quality problem.

4. The utility model provides a cooperation circular bead 1-1, location circular bead 1-2 and centre bore can also regard as the alignment benchmark when each hole at milling machine processing bowl bottom, have solved the unable alignment's of milling machine problem.

5. The utility model discloses cooperation circular bead 1-1 lateral wall in the vexed head can also fix a position the work piece in the axial direction, prevents axial float in the work piece course of working, and then has guaranteed the geometric tolerances of work piece.

Drawings

FIG. 1 is a front cross-sectional view of a bowl-shaped titanium alloy thin-wall part; FIG. 2 is a view of FIG. 1 at A; fig. 3 is a front view of the present invention; FIG. 4 is a top view of FIG. 3; fig. 5 is a schematic view of the present invention in cooperation with a workpiece during machining.

Detailed Description

The first embodiment is as follows: the embodiment is described with reference to fig. 3 to 4, and the special bulkhead for turning the bowl-shaped titanium alloy thin-walled workpiece of the embodiment is a disc-shaped body 1, the lower end surface of the disc-shaped body 1 is a horizontal end surface, the upper end surface of the disc-shaped body 1 is provided with a matching shoulder 1-1 and a positioning shoulder 1-2 which are sequentially processed from outside to inside, the matching shoulder 1-1 and the positioning shoulder 1-2 are both circular bosses, the diameter of the positioning shoulder 1-2 is smaller than that of the matching shoulder 1-1, compared with the horizontal end surface of the lower end surface of the disc-shaped body 1, the height of the matching shoulder 1-1 is smaller than that of the positioning shoulder 1-2, the matching shoulder 1-1 is provided with a plurality of weight-reducing holes 1-3, and the positioning shoulder 1-2 is provided with a central hole 1-4.

The embodiment is a choke plug specially used for turning the spherical surface of the titanium alloy end closure according to the actual characteristics of a product. The purpose of smoothly processing the spherical surface of the end socket is achieved.

When the embodiment is in practical use, the clamping device can not deform when the spherical surface of the end socket is machined, and vibration generated in the machining process of thin-wall parts such as the end socket can be eliminated.

The embodiment is used for turning the spherical surface of the end socket, can also be used as an alignment reference for processing holes in the bottom of the bowl, and can be popularized and used.

The second embodiment is as follows: referring to fig. 3 to 4, the present embodiment will be described, in which a plurality of lightening holes 1-3 are formed in an annular array on a mating shoulder 1-1. So set up, be convenient for alleviate the weight of vexed head, can also guarantee that the whole weight of vexed head is balanced, can not take place eccentric oscillation. Other components and connections are the same as in the first embodiment.

The third concrete implementation mode: the present embodiment is described with reference to fig. 3 to 4, and the number of the lightening holes 1 to 3 of the present embodiment is 6 to 12. So set up, can effectively guarantee satisfying under the prerequisite that subtracts heavy, can also guarantee the intensity that the vexed head supported the work piece inside wall. Other compositions and connections are the same as in the first or second embodiments.

The fourth concrete implementation mode: the present embodiment will be described with reference to fig. 3 to 4, and the disc-shaped body 1 of the present embodiment has a diameter of 500 mm. So set up, be convenient for with the external diameter phase-match of work piece, realize the perfect laminating with the work piece. Other compositions and connection relationships are the same as in the first, second or third embodiment.

The fifth concrete implementation mode: the present embodiment is described with reference to fig. 3 to 4, and the height difference between the engagement shoulder 1-1 and the positioning shoulder 1-2 of the present embodiment is 5 mm. With the arrangement, under the condition of meeting the requirement of weight reduction, a very stable clearance fit connection relationship exists between the height of the matching shoulder 1-1 and the inner side wall of the workpiece. Other compositions and connection relationships are the same as those in the first, second, third or fourth embodiment.

The sixth specific implementation mode: the present embodiment will be described with reference to fig. 3 to 4, and the circular boss height of the engagement shoulder 1-1 of the present embodiment is 15 mm. So set up, be convenient for satisfy the cooperation demand. Other compositions and connection relationships are the same as in the first, second, third, fourth or fifth embodiment.

The seventh embodiment: the present embodiment will be described with reference to fig. 3 to 4, and the lightening holes 1 to 3 of the present embodiment have a diameter of 40 mm. So set up, be convenient for satisfy and subtract heavy demand, be convenient for moreover process. Other compositions and connection relationships are the same as in the first, second, third, fourth, fifth or sixth embodiment.

The specific implementation mode is eight: the present embodiment will be described with reference to fig. 3 to 4, and the diameter of the center hole 1-4 of the present embodiment is 60 mm. So set up, be convenient for process, can regard as the location center moreover. Other compositions and connection relationships are the same as those of embodiment one, two, three, four, five, six or seven.

The working principle of the present invention is explained with reference to fig. 3 to 5:

when the choke plug is designed, the outer circle of the choke plug is in small clearance fit with the inner hole of the product, the clearance is 0.005-0.015mm, and when the choke plug and the product are disassembled and assembled, in order to prevent the choke plug from interfering with the inner hole of the product and scratches, the disassembly and assembly are carried out in a dry ice cooling mode in the disassembly and assembly process.

Claims

1. The utility model provides a special vexed head of turning bowl form titanium alloy thin wall spare which characterized in that: the choke plug is a disc-shaped body (1), the lower end face of the disc-shaped body (1) is a horizontal end face, the upper end face of the disc-shaped body (1) is provided with a matching shoulder (1-1) and a positioning shoulder (1-2) which are sequentially processed from outside to inside, the matching shoulder (1-1) and the positioning shoulder (1-2) are circular bosses, the diameter of the positioning shoulder (1-2) is smaller than that of the matching shoulder (1-1), compared with the horizontal end face of the lower end face of the disc-shaped body (1), the height of the matching shoulder (1-1) is smaller than that of the positioning shoulder (1-2), a plurality of lightening holes (1-3) are formed in the matching shoulder (1-1), and a central hole (1-4) is formed in the positioning shoulder (1-2).

2. The special bulkhead for turning the bowl-shaped titanium alloy thin-wall part according to claim 1, wherein the special bulkhead comprises the following components in percentage by weight: a plurality of lightening holes (1-3) are arranged on the matching shoulder (1-1) in an annular array.

3. The special bulkhead for turning the bowl-shaped titanium alloy thin-wall part according to claim 2, wherein the special bulkhead comprises the following components in percentage by weight: the number of the lightening holes (1-3) is 6-12.

4. The special bulkhead for turning the bowl-shaped titanium alloy thin-wall part according to claim 3, wherein the special bulkhead comprises the following components in percentage by weight: the diameter of the disc-shaped body (1) is 500 mm.

5. The special bulkhead for turning the bowl-shaped titanium alloy thin-wall part according to claim 4, wherein the special bulkhead comprises the following components in percentage by weight: the height difference between the matching shoulder (1-1) and the positioning shoulder (1-2) is 5 mm.

6. The special bulkhead for turning the bowl-shaped titanium alloy thin-wall part according to the claim 1 or 5, wherein the special bulkhead is characterized in that: the height of the circular boss of the matching shoulder (1-1) is 15 mm.

7. The special bulkhead for turning the bowl-shaped titanium alloy thin-wall part according to claim 6, wherein the special bulkhead comprises the following components in percentage by weight: the diameter of the lightening holes (1-3) is 40 mm.

8. The special bulkhead for turning the bowl-shaped titanium alloy thin-wall part according to claim 7, wherein the special bulkhead comprises the following components in percentage by weight: the diameter of the central hole (1-4) is 60 mm.