CN103231014B

CN103231014B - Special die for tandem mill roll gap measurement tool

Info

Publication number: CN103231014B
Application number: CN201310152438.7A
Authority: CN
Inventors: 罗兴仕; 陈化峋
Original assignee: Wuxi Seamless Oil Pipe Co Ltd
Current assignee: Wuxi Seamless Oil Pipe Co Ltd
Priority date: 2010-09-09
Filing date: 2010-09-09
Publication date: 2015-04-15
Anticipated expiration: 2030-09-09
Also published as: CN103231014A

Abstract

The invention provides a special die for a tandem mill roll gap measurement tool. The tandem mill roll gap measurement tool can be conveniently and simply molded, and the tandem mill roll gap measurement tool can be conveniently taken out. The special die comprises an upper die and a lower die, and is characterized in that an elliptical casting model cavity is formed in the upper die; a mold stripping angle inclined to the vertical line of the bottom surface of the lower die is formed in the inner wall of the casting model cavity; and a through hole is formed in the position, which corresponds to the casting model cavity of the upper die, of the lower die.

Description

A kind of Special die for tandem mill roll gap measurement tool

The divisional application that the application is the applying date is on September 9th, 2010, application number is the patent application of 201010276685.4, the denomination of invention of original application is a kind of tandem mill roll gap survey tool, the manufacture method of instrument and particular manufacturing craft.

Technical field

The present invention relates to the technical field of supplemental measurement tool, be specially a kind of Special die for tandem mill roll gap measurement tool.

Background technology

Oil and natural gas is the important energy source of the mankind, extensive use in industrial production and daily life.China manufacture Article 1 tube rolling line on October 22nd, 2006 after Wuxi is put into serial production, petroleum pipeline produce grow up rapidly in China.In the restraint tandem rolling operation of pipe production, need the size easily and accurately measuring roll gap, in currently available technology, have two kinds of roll gap measuring methods:

See Fig. 1, one puts between two rolls 1,2 in roll gap 3 with cylinder lead rod (cross section diameter is 50mm, length 1m), extrudes two planes, be roll gap size by the distance of vernier caliper measurement two planes by roller rotational in the both sides that lead rod is relative.

The Weight computation of single lead rod is as follows:

G _{lead rod}=ρ V=11.34 × 3.14 × (0.05/2) ²× 1000=22.25Kg

The drawback of this measuring method is: lead rod weight is large, carries inconvenience, single not easy to operate, easily causes roll gap dimensional measurement inaccurate, and lead rod utilizes and lowly causes unnecessary waste;

Second method puts between two rollers 1,2 with clamp, and find two roller roller limit place minimum ranges, then clamp are extracted out between roll, two points that clamp are contacted with roller limit are placed on readout value on straight steel ruler or slide measure, are roll gap size.

The drawback of this method is: (1) clamp need very skilled experience when searching two roller roller limit minimum range, and new employee not easily finds accurately; (2) clamp are extracted out at the outer reading of roll, in the process holding extraction, clamp easily change with two of roll contact relative distances, cause reading to be forbidden.

Because above-mentioned two kinds of methods all easily cause roll gap dimensional measurement inaccurate, thus thickness of steel pipe may be caused uneven, affect tube quality, make steel pipe in use produce production accident.

When adopting tandem mill roll gap survey tool to measure, adopting tandem mill roll gap survey tool to carry out measurement can be more convenient, accurate, but tandem mill roll gap survey tool needs to cast, common casting die can not meet the simple casting requirement of tandem mill roll gap survey tool, common casting die is not casting die complex structure usually, is exactly that casting process is complicated.

Summary of the invention

For above-mentioned technical problem, the invention provides a kind of Special die for tandem mill roll gap measurement tool, can facilitate, formed connected mill roll-gap survey tool simply, and take out tandem mill roll gap survey tool easily.

Its technical scheme is such: a kind of Special die for tandem mill roll gap measurement tool, it comprises upper die and lower die ,it is characterized in that: described patrix has oval casting moulds die cavity, described casting moulds die cavity inwall has the depanning angle tilted with counterdie bottom surface vertical line, and on described counterdie, corresponding described patrix casting moulds die cavity is provided with through hole.

It is further characterized in that: be movably set with the bolt with umbrella tooth in described casting moulds die cavity, the bolt end of the described bolt with umbrella tooth is arranged in described through hole, the umbrella increment of the described bolt with umbrella tooth is arranged in described casting moulds die cavity, the described bolt with umbrella tooth is provided with the shaft shoulder, and the described shaft shoulder forms support relative to counterdie to the bolt with umbrella tooth; The umbrella tooth angle of inclination of the described bolt with umbrella tooth is 60 degree; Described umbrella tooth and the described bolt circle cylinder with umbrella tooth form groove; Described umbrella tooth is three; The depanning angle that described casting moulds die cavity inwall and counterdie bottom surface vertical line tilt is 1 °; Described patrix there are eight described casting moulds die cavities, described counterdie have eight described through holes.

In said structure of the present invention, because casting moulds die cavity inwall has the depanning angle tilted with counterdie bottom surface vertical line, on described counterdie, corresponding described patrix casting moulds die cavity is provided with through hole, can facilitate, formed connected mill roll-gap survey tool simply, by the through hole on counterdie, take out tandem mill roll gap survey tool easily.

Accompanying drawing explanation

Fig. 1 is existing measuring method schematic diagram;

Fig. 2 is Special die for tandem mill roll gap measurement tool structural representation of the present invention;

Fig. 3 is Special die for tandem mill roll gap measurement tool patrix front sectional view of the present invention;

Fig. 4 is the top view of Fig. 3;

Fig. 5 is Special die for tandem mill roll gap measurement tool counterdie front sectional view of the present invention;

Fig. 6 is the top view of Fig. 5.

Detailed description of the invention

As shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, a kind of Special die for tandem mill roll gap measurement tool, comprises patrix 4, counterdie 5 ,patrix 4 there is the casting moulds die cavity 6 that eight oval, casting moulds die cavity 6 inwall 8,9 and counterdie bottom surface vertical line are formed slopely the depanning angle 10 of 1 °, on counterdie 5, corresponding patrix casting moulds die cavity 6 is provided with eight through holes 11, the bolt 7 with umbrella tooth is movably set with in casting moulds die cavity 6, bolt end 7a with the bolt 7 of umbrella tooth is arranged in through hole 11, and the umbrella increment 7b with the bolt 7 of umbrella tooth is arranged in casting moulds die cavity 6; The shaft shoulder 15 is provided with on the bolt 7 of umbrella tooth, the shaft shoulder 15 forms support relative to counterdie 4 to the bolt 7 with umbrella tooth, in casting moulds die cavity 6, can facilitate, formed connected mill roll-gap survey tool simply, foundry goods is ejected by the through hole on counterdie, take out tandem mill roll gap survey tool easily, because casting moulds die cavity inwall has the depanning angle tilted with counterdie bottom surface vertical line, make tandem mill roll gap survey tool more smooth and easy.

Bolt 7 with umbrella tooth is placed in casting moulds die cavity 6, cast in casting moulds die cavity 6, with the bolt 7 of umbrella tooth and cast integrator after moulding by casting, umbrella tooth 12 angle of inclination with the bolt 7 of umbrella tooth is 60 degree, three umbrella teeth 12 with the bolt 7 of umbrella tooth become groove 13 with bolt 7 cylindrical with umbrella tooth, three angles are that the umbrella flank of tooth of 60 ° and bolt circle cylinder form three grooves 13, and during cast, lead is full of groove and bolt shape is integral, can not be separated during taking-up.

Claims

1. a Special die for tandem mill roll gap measurement tool, it comprises upper die and lower die ,it is characterized in that: described patrix has oval casting moulds die cavity, described casting moulds die cavity inwall has the depanning angle tilted with counterdie bottom surface vertical line, and on described counterdie, corresponding described patrix casting moulds die cavity is provided with through hole; The bolt with umbrella tooth is movably set with in described casting moulds die cavity, the bolt end of the described bolt with umbrella tooth is arranged in described through hole, the umbrella increment of the described bolt with umbrella tooth is arranged in described casting moulds die cavity, the described bolt with umbrella tooth is provided with the shaft shoulder, and the described shaft shoulder forms support relative to counterdie to the bolt with umbrella tooth; The umbrella tooth angle of inclination of the described bolt with umbrella tooth is 60 degree; Described umbrella tooth and the described bolt circle cylinder with umbrella tooth form groove; Described umbrella tooth is three.

2. a kind of Special die for tandem mill roll gap measurement tool according to claim 1, is characterized in that: the depanning angle that described casting moulds die cavity inwall and counterdie bottom surface vertical line tilt is 1 °.

3. a kind of Special die for tandem mill roll gap measurement tool according to claim 1, is characterized in that: described patrix has eight described casting moulds die cavities, described counterdie has eight described through holes.