CN213671123U

CN213671123U - Core rod for tube rolling machine

Info

Publication number: CN213671123U
Application number: CN202022110724.5U
Authority: CN
Inventors: 王军超; 张晓辉
Original assignee: Baoji Jieteri Metal Material Co ltd
Current assignee: Baoji Jieteri Metal Material Co ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2021-07-13
Anticipated expiration: 2030-09-24

Abstract

The utility model discloses a prick plug for pipe machine, its technical scheme main points are: the mandrel comprises an inner tube, an outer tube is sleeved outside the inner tube, a separation space is formed between the inner tube and the outer tube, a cooling tube is arranged in a tube cavity of the inner tube, a cooling space is formed between the cooling tube and the inner tube, two ends of the cooling tube are sealed, stress fillers are filled in the separation space, an end cover is in threaded connection with a port of the inner tube, an insertion groove for the insertion of the cooling tube is formed in one end, opposite to the tube cavity of the inner tube, of the end cover, a fixing cover is fixedly connected with the end of the outer tube, the fixing cover is fixedly adhered to the end cover, a traction block is fixedly connected to the outer portions of the outer tube and the fixing cover together, and the outer tube, the inner tube, the cooling tube and the traction block; the effects of low manufacturing cost, simple processing and easy operation, resource saving and operation cost reduction are achieved.

Description

Core rod for tube rolling machine

Technical Field

The utility model belongs to bundle the pipe field, concretely relates to core rod for tube bundling machine.

Background

Retained mandrel Mill, abbreviated in english as MPM (i.e. abbreviation for Multi-Stand Pipe Mill). The first set of retained mandrel tandem rolling mill set introduced in Italy is an important equipment in seamless steel pipe production, and is put into production in Tianjin Steel pipe group, Inc. in 1992. Through technical transformation, the phi 250mm retained mandrel tandem rolling mill group of the Tianjin steel tube group has the annual capacity of 50 ten thousand tons by design and is expanded to the current annual capacity of 100 ten thousand tons.

The core rod used by the existing tube rolling machine has high quality requirements on the rolling surface hardness, the straightness, the surface quality, the non-deformation and the like, the core rod has to resist large radial pressure in the rolling operation, the core rod is rolled or forged into a solid round rod until now, the surface is processed (finished and hardened), and an axial hole is drilled for a coolant to pass through, but the solid round rod has high production and processing cost, high processing difficulty, resource waste and increased operation cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a plug for tube bundling machine to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a mandrel for tube bundling machine, includes the inner tube, the outside cover of inner tube is equipped with the outer tube, form the partition space between inner tube and the outer tube, be provided with the cooling tube in the lumen of inner tube, the cooling tube with form the cooling space between the inner tube, the both ends of cooling tube are sealed form, it has the atress filler to separate the space intussuseption, the port department threaded connection of inner tube has the end cover, the end cover is relative the confession has been seted up to the one end of inner tube lumen the inserting groove that the cooling tube was pegged graft, the fixed lid of tip fixedly connected with of outer tube, fixed lid with the end cover is pasted fixedly, the outer tube with the common fixedly connected with traction block in outside of fixed lid, the outer tube the inner tube the cooling tube the traction block constitutes the mandrel.

Preferably, the inner cavity of the cooling pipe is filled with coolant.

Preferably, the stressed filler is a thermosetting plastic filler.

Preferably, the outer pipe is a nickel steel outer pipe, and the inner pipe is a manganese steel inner pipe.

Preferably, the fixed cover is fixedly connected with the outer pipe through a plurality of bolts, the bolts are bolts, and counter bores for inserting the bolts are formed in the port positions of the outer pipe.

Preferably, the fixed cover and the traction block are connected with a threaded rod through common threads, the end part of the threaded rod is fixedly connected with a traction ring, and the threaded rod is connected with a locking nut through threads at the end part of the traction block.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) this plug for tube bundling machine establishes fixedly through inner tube and outer tube cover when using, and inner tube center department sets up the cooling tube, and is fixed through end cover, fixed lid, traction block again, makes up into the plug body, and outer tube and inner tube preparation simple process can extensive economic volume production moreover, reach low in cost, processing simple easy operation, resources are saved, reduce running cost's effect.

(2) When the mandrel for the tube rolling machine is used, the cooling tube is fixed in the inner tube, the cooling agent is filled in the cooling tube, and a cooling space is formed between the cooling tube and the inner tube, so that the effects of quickly cooling the mandrel body and improving the use turnover rate can be achieved.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a sectional view of the structure of the present invention;

fig. 3 is a side view and a cross-sectional view of the structure of the present invention.

In the figure: 1. an inner tube; 2. an outer tube; 3. separating the space; 4. a cooling tube; 5. a cooling space; 6. a stressed filler; 7. an end cap; 8. inserting grooves; 9. a fixed cover; 10. a traction block; 11. a mandrel body; 12. a bolt; 13. a counter bore; 14. a threaded rod; 15. a traction ring; 16. and locking the nut.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a mandrel for a tube rolling machine, wherein the technical solution is as follows:

including inner tube 1, the outside cover of inner tube 1 is equipped with outer tube 2, form separation space 3 between inner tube 1 and the outer tube 2, be provided with cooling tube 4 in the lumen of inner tube 1, form cooling space 5 between cooling tube 4 and the inner tube 1, the both ends of cooling tube 4 are sealed form, it is filled with atress filler 6 to separate 3 intussuseption in the space, the port department threaded connection of inner tube 1 has end cover 7, the inserting groove 8 that supplies cooling tube 4 to peg graft is seted up to the one end of the 1 lumen of the relative inner tube of end cover 7, the fixed lid 9 of tip fixedly connected with of outer tube 2, fixed lid 9 is pasted fixedly with end cover 7, outer tube 2 and the common fixedly connected with traction block 10 in outside of fixed lid 9, outer tube 2, inner tube 1, cooling tube 4, traction block 10.

In this embodiment, preferably, the cooling tube 4 is filled with a coolant in its inner cavity; the cooling speed of the mandrel body 11 can be increased, and the use turnover rate can be improved.

In this embodiment, preferably, the stressed filler 6 is a thermosetting plastic filler; under the premise of stress, the expansion coefficient is relatively fixed, and the thermal expansion is not excessively generated.

In this embodiment, preferably, the outer pipe 2 is a nickel steel outer pipe, and the inner pipe 1 is a manganese steel inner pipe; the nickel steel has the advantages of high mechanical strength, high hardness and toughness, heat resistance, corrosion resistance and the like.

In this embodiment, preferably, the fixing cover 9 is fixedly connected with the outer tube 2 through a plurality of bolts 12, the bolts 12 are bolts 12, and the end opening of the outer tube 2 is provided with a counter bore 13 into which the bolt 12 is inserted; the arrangement of the counter bore 13 avoids the protruding of the bolt 12 and influences the joint between the fixed cover 9 and the traction block 10.

In this embodiment, preferably, a threaded rod 14 is screwed on the fixing cover 9 and the traction block 10 together, a traction ring 15 is fixedly connected to the end of the threaded rod 14, and a locking nut 16 is screwed on the threaded rod 14 at the end of the traction block 10.

The utility model discloses a structure:

the mandrel body 11 is provided with a structure by sleeving an outer pipe 2 and an inner pipe 1, a cooling pipe 4 is arranged in the center of the inner pipe 1, a separation space 3 formed between the inner pipe 1 and the outer pipe 2 is filled with a stressed filler 6, the rolling force acting on the outer pipe 2 is transmitted to the inner pipe 1, the outer pipe 2 is supported by the inner pipe 1, the outer pipe 2 and the inner pipe 1 are concentric and coaxial, the difference between the inner diameter of the outer pipe 2 and the outer diameter of the inner pipe 1 and the expansion coefficient of the stressed filler 6 are selected, the expansion of the pipe caused by heat acting on the outer pipe 2 during rolling is the same as the expansion of the stressed filler 6 caused by heat conducted to the stressed filler 6 by the outer pipe 2, and the traction blocks 10 and the traction rings 15 at the two ends of the outer pipe 2 facilitate taking and placing of the mandrel body 11; when the mandrel for the tube rolling machine is used, the inner tube 1 and the outer tube 2 are sleeved and fixed, the cooling tube 4 is arranged at the center of the inner tube 1 and then fixed through the end cover 7, the fixing cover 9 and the traction block 10 to form the mandrel body 11, the outer tube 2 and the inner tube 1 are simple in manufacturing process and can be produced in large-scale economic mass production, and the effects of low manufacturing cost, simplicity in processing and easiness in operation, resource saving and operation cost reduction are achieved; when the mandrel for the tube rolling machine is used, the cooling tube 4 is fixed in the inner tube 1, the cooling agent is filled in the cooling tube 4, and the cooling space 5 is formed between the cooling tube 4 and the inner tube 1, so that the effects of quickly cooling the mandrel body 11 and improving the use turnover rate can be achieved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a plug for tube rolling machine, includes inner tube (1), its characterized in that: the outer sleeve of inner tube (1) is equipped with outer tube (2), form separation space (3) between inner tube (1) and outer tube (2), be provided with cooling tube (4) in the lumen of inner tube (1), cooling tube (4) with form cooling space (5) between inner tube (1), the both ends of cooling tube (4) are sealed form, separation space (3) intussuseption is filled with atress filler (6), the port department threaded connection of inner tube (1) has end cover (7), end cover (7) are relative the one end of inner tube (1) lumen is seted up and is supplied inserting groove (8) that cooling tube (4) pegged graft, the tip fixedly connected with fixed cover (9) of outer tube (2), fixed cover (9) with end cover (7) are pasted fixedly, outer tube (2) with the common fixedly connected with traction block (10) in the outside of fixed cover (9), the outer pipe (2), the inner pipe (1), the cooling pipe (4) and the traction block (10) jointly form a core rod body (11).

2. The mandrel for a tube rolling machine according to claim 1, wherein: the inner cavity of the cooling pipe (4) is filled with coolant.

3. The mandrel for a tube rolling machine according to claim 1, wherein: the stressed filler (6) is a thermosetting plastic filler.

4. The mandrel for a tube rolling machine according to claim 1, wherein: the outer pipe (2) is a nickel steel outer pipe, and the inner pipe (1) is a manganese steel inner pipe.

5. The mandrel for a tube rolling machine according to claim 1, wherein: fixed lid (9) with outer tube (2) are through a plurality of bolt (12) fixed connection, bolt (12) are bolt (12), the port department of outer tube (2) has seted up the confession bolt (12) male counter bore (13).

6. The mandrel for a tube rolling machine according to claim 1, wherein: the fixed cover (9) and the common threaded connection has a threaded rod (14) on the traction block (10), the end part of the threaded rod (14) is fixedly connected with a traction ring (15), and the threaded rod (14) is connected with a locking nut (16) at the end part of the traction block (10).