CN104232874A

CN104232874A - Method for quenching slip inserts

Info

Publication number: CN104232874A
Application number: CN201310236386.1A
Authority: CN
Inventors: 刘宝峰
Original assignee: TIANJIN ZHENGHAN PETROCHEMICAL EQUIPMENT MANUFACTURING Co Ltd
Current assignee: TIANJIN ZHENGHAN PETROCHEMICAL EQUIPMENT MANUFACTURING Co Ltd
Priority date: 2013-06-16
Filing date: 2013-06-16
Publication date: 2014-12-24

Abstract

The invention relates to a method for quenching slip inserts, which comprises the following steps: 1)producing a steel ring through a forming machine or a die, and coaxially arranging several same annular slip inserts at interval along the radial direction of the outer rim of the steel ring; 2)coating a quenching medium to several annular slip inserts, respectively filling or smearing an antiseepage carbon material on upper transverse plane and lower transverse plane of the steel ring and the bore of the steel ring; 3)placing the steel ring in a quenching furnace and quenching the slip inserts; 4)removing the residual antiseepage carbon material, and respectively cutting the inner wall of the steel ring and the upper transverse plane and lower transverse plane of the steel ring; and 5)dividing the cut steel ring into equal arc blocks along the radial direction, wherein the arc block is the final slip inserts finished product. According to the invention, the thickness and height balance of the slip body can be made by prefabricating the steel ring, the anti-carburizing treatment is carried out on the balance, the balance is removed, real slip body is exposed, unnecessary carburizing of the slips body during the quenching process can be avoided, slips body intensity can be increased, and the influence for removal of an anti-carburizing layer to the acutance of the slip inserts can be reduced.

Description

A kind of quenching method of slip insert

Technical field

The invention belongs to field of steel metallurgy, relate to slips, especially a kind of quenching method of slip insert.

Background technology

No matter be drilling well or hydrostatic transmission rig, slips is all its important composition parts, this slips wall is shaped with steel tooth usually, is usually referred to as slip insert.Slips itself needs to possess certain fastness to rubbing, slip insert also needs to possess certain toughness and intensity on this basis, slip insert after mechanical-moulded and slips body are normally integrally made, its slip insert intensity does not often reach specified intensity, need to carry out quench treatment to improve slip insert intensity to it, need before quenching slip insert coating quenchant, and anti-carburizi ng material is smeared to slips body, ensure slips body and slip insert functional attributes separately thus.And in actual quenching process, because slips is batch production, extruding or overlap joint can be there is in multiple slips in quenching furnance, no matter that quenchant or anti-carburizi ng material there will be and be infected with, this just creates very large impact to the precision of quenching technology, slip insert local strength after frequent appearance quenching is inadequate, or there is the situations such as crackle in slips, and, slip insert itself has higher acutance, above-mentioned situation also can affect the acutance of the rear slip insert of quenching, after quenching, in order to avoid affecting the acutance of slip insert, in the process of taking off remaining anti-carburizi ng material, should avoid contacting slip insert, but this also increases manually-operated difficulty.

Through retrieval, do not find the patent documentation relevant to present patent application content.

Summary of the invention

The object of the invention is to overcome the deficiencies in the prior art, the slip insert quenching method that a kind of operation steps is simple, avoid the carburizing of slips body by cutting reserved layer is provided.

The technical scheme that the present invention takes is:

A quenching method for slip insert, the steps include:

(1) make a steel loop by forming machine or mould, the radial coaxial spaced of this steel loop outer rim is shaped with multiple identical annular slip insert;

(2), to multiple annular slip insert coating quenchant, fill respectively to steel loop endoporus and steel loop upper/lower terminal face or smear anti-carburizi ng material;

(3) steel loop is put into quenching furnance, slip insert is quenched;

(4) the steel loop after being quenched by slip insert takes out from quenching furnance, take off remaining anti-carburizi ng material, carry out annular to steel loop inwall to cut, steel loop inner wall thickness after cutting is identical with for fabrication watt wall thickness, to steel loop upper/lower terminal, portion carries out horizontal cutting respectively, and the steel loop height after cutting is with watt highly identical for fabrication;

(5) the steel loop radial direction after cutting is divided into large arc block such as multiple grade, the large arc slip insert such as each arc block to be all shaped with, the plurality of arc block being shaped with arc slip insert is final slips finished product.

And the (1) described steel loop wall thickness of step is greater than for fabrication watt body wall thickness, height is higher than for fabrication watt body height.

And the annular of carrying out specified size in the steel loop appointed part that step is (4) described is cut, and makes the depression in slips body outer rim.

Advantage of the present invention and positively effect are:

1, by prefabricated steel loop by the thickness of slips body with highly all make surplus, anti-carburizi ng process is carried out to this surplus, again this surplus is removed, expose actual slips body, thus avoid the carburizing that slips body is unnecessary in quenching process, ensure the lifting of slips bulk strength thus, decrease and remove antiseepage carbon-coating to the impact of slip insert acutance.

2, no matter processed slips body by the present invention, be all can once shaped and batch is made to slip insert or the process at slips medial recess place, which thereby enhance slip insert also with slips medial recess place make efficiency and mark degree.

Accompanying drawing explanation

Fig. 1 is the structural representation of slips in the present invention;

Fig. 2 is the right view of Fig. 1;

Fig. 3 is the upward view of Fig. 1;

Fig. 4 is the structural representation of prefabricated component in the present invention;

Fig. 5 be in Fig. 4 A-A to sectional view.

Embodiment

Below in conjunction with embodiment, the present invention is further described, and following embodiment is illustrative, is not determinate, can not limit protection scope of the present invention with following embodiment.

A quenching method for slip insert, the steps include:

(1) see Fig. 1 ~ 4, make a steel loop 5 by the equipment such as forming machine or mould, this steel loop wall thickness is greater than for fabrication watt body 1 wall thickness, and height is higher than wish fabrication watt body height, and the radial coaxial spaced of this steel loop outer rim is shaped with multiple identical annular slip insert 2;

(3) steel loop is put into quenching furnance, quench to slip insert, the design parameters such as the equipment adopted due to quenching technology and operation are prior art, therefore do not repeat them here;

(4) see Fig. 4, Fig. 5, steel loop after being quenched by slip insert takes out from quenching furnance, take off remaining anti-carburizi ng material, carry out annular to steel loop inwall 6 to cut, steel loop inner wall thickness after cutting is identical with for fabrication watt wall thickness, carry out horizontal cutting respectively to steel loop upper/lower terminal portion 4, the steel loop height after cutting is with watt highly identical for fabrication; Due to part slips body outer rim needing the depression 3 being shaped with certain size, the annular cutting of specified size can be carried out in steel loop appointed part;

Claims

1. a quenching method for slip insert, is characterized in that: the steps include:

(3) steel loop is put into quenching furnance, slip insert is quenched;

2. the quenching method of according to claim 1 watt of tooth, is characterized in that: the (1) described steel loop wall thickness of step is greater than for fabrication watt body wall thickness, and height is higher than for fabrication watt body height.

3. the quenching method of according to claim 1 watt of tooth, is characterized in that: the annular of carrying out specified size in the steel loop appointed part that step is (4) described is cut, and makes the depression in slips body outer rim.