CN2647485Y

CN2647485Y - Double-correction squeezing tap

Info

Publication number: CN2647485Y
Application number: CN 03260262
Authority: CN
Inventors: 齐长海
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-07-11
Filing date: 2003-07-11
Publication date: 2004-10-13
Anticipated expiration: 2013-07-11

Abstract

The utility model relates to a double-correcting extrusion tap. A spiral-groove-shaped cutting part and a spiral-edge-shaped extruding part are arranged at the front-end of the tap handle and a spiral scraping part is arranged approaching a transitional groove. After an extruding correction, the device conducts an additional more accurate tooth-type scraping correction. The second correction can eliminate the tooth-type errors caused by the uneven extrusion rebounding and the wearing of cutters, and eliminate burrs at the same time. The interior screw thread processed by the double-correcting extrusion tap is of a higher precision and a high production pass-rate. The utility model can prolong the life-span of cutters and reduce the production cost.

Description

Two correction thread forming taps

Affiliated technical field

The utility model relates to a kind of cutter, definite a kind of petroleum machinery screw tool of saying so.

Background technology

At present, on the processing petroleum industry, during the box cupling of the sucker rod of oil recovery usefulness, all thread forming taps are not all eliminated owing to push the resilience inequality, the burr that produces in the flute profile sum of errors extrusion process that tool wear forms.Thread tooth type sum of errors burr influences product quality and qualification rate." helicla flute rib thread forming tap " application number 99250414.7 utility model patents of State Intellectual Property Office's bulletin are that I apply for that also there is above-mentioned technical deficiency problem in this patent.

Summary of the invention

The purpose of this utility model is to overcome the weak point that exists in the above-mentioned technology, provides a kind of simple in structure, reasonable in design, two thread forming taps of proofreading and correct that the rod collar precision that the processing oil field is used is high.

In order to achieve the above object, the technical solution adopted in the utility model is: the tap holder front end be provided with in the shape of a spiral grooved cutting position and in the shape of a spiral the rib type push the position, be abutted against mutually with excessive groove and be provided with spiral scraping position.

The utility model has the advantages that:

After extruding is proofreaied and correct, carry out once more accurate flute profile scraping again and proofread and correct, second-order correction can be eliminated the flute profile error that the extruding resilience is uneven and tool wear forms.Simultaneously can deburring.The internal thread precision that processes with two correction thread forming taps is higher, the qualification rate height.Improve cutter life, reduce product cost.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is the A-A cutaway view of Fig. 1;

Fig. 3 is the B-B cutaway view of Fig. 1;

Fig. 4 is the C-C cutaway view of Fig. 1;

The specific embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.

By Fig. 1-Fig. 4 as can be known, the utility model is to be provided with grooved cutting position and rib type extruding position in the shape of a spiral in the shape of a spiral at the tap holder front end, is abutted against mutually with excessive groove to be provided with spiral scraping position.

Set cutting slot, extruding oil scupper, the scraping groove of described cutting position, extruding position and scraping position three parts is screw type or linear pattern.

Described scraping position is proofreaied and correct tooth by guide gear, scraping and is constituted.

Described extruding position is proofreaied and correct tooth by extruding guide gear, extruding and is constituted, the angle that the oil scupper angle theta of tooth cross section is proofreaied and correct in extruding is 35-80 °, the angle of the anterior angle β of scraping position cross section is 0-10 °, the helical angle at cutting position, extruding position and scraping position equates, the angle of pitch angle gamma 1, γ 2, γ 3 is 0-10 °, cutting guide cone half-angle, extruding guide cone half-angle, scraping guide cone half-angle equate that guiding half-angle α 1, α 2, α 3 angles are 2-10 °.

Form by cutting position, extruding position and scraping position three parts by the utility model shown in Figure 1, wherein cut guide gear 1, cutting correction tooth 2 formation cutting positions, undercut 3, extruding guide gear 4, extruding correction tooth 5 formation extruding positions.Proofread and correct tooth 8 composition scraping positions with scraping guide gear 7 and scraping that undercut 6 is abutted against mutually, 9 is shank.

Claims

1. two thread forming tap of proofreading and correct comprises handle, cutting position, extruding position, it is characterized in that: the tap holder front end be provided with in the shape of a spiral grooved cutting position and in the shape of a spiral the rib type push the position, be abutted against mutually with excessive groove and be provided with spiral scraping position.

2. according to the described two thread forming taps of proofreading and correct of claim 1, it is characterized in that: set cutting slot, extruding oil scupper, the scraping groove of described cutting position, extruding position and scraping position three parts is screw type or linear pattern.

3. according to the described two thread forming taps of proofreading and correct of claim 1, it is characterized in that: described scraping position is proofreaied and correct tooth and is constituted by guiding scraping tooth, scraping.

4. according to the described two thread forming taps of proofreading and correct of claim 1, it is characterized in that: described extruding position is proofreaied and correct tooth by extruding guide gear, extruding and is constituted, the angle that the oil scupper angle theta of tooth cross section is proofreaied and correct in extruding is 35-80 °, the angle of the anterior angle β of scraping position cross section is 0-10 °, the helical angle at cutting position, extruding position and scraping position equates, the angle of pitch angle gamma 1, γ 2, γ 3 is 0-10 °, cutting guide cone half-angle, extruding guide cone half-angle, scraping guide cone half-angle equate that guiding half-angle α 1, α 2, α 3 angles are 2-10 °