CN201250612Y

CN201250612Y - Extrusion forming down-hole drill rod

Info

Publication number: CN201250612Y
Application number: CNU2008201480364U
Authority: CN
Inventors: 张永
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-07-18
Filing date: 2008-07-18
Publication date: 2009-06-03
Anticipated expiration: 2018-07-18

Abstract

The utility model discloses an extrusion forming down-hole drill rod, which is composed of a thread head 1, a bayonet 2 arranged on the back of the thread head 1 and a rod body 3, wherein the thread head 1, the bayonet 2 and the rod body 3 are integral structure through extrusion forming, the thread head 1 is a thickened outer screw thread structure with reduced diameter, the bayonet 2 comprises four symmetrical grooves arranged evenly with equal thickness and equal distance, the front end of the rod body 3 is a hollow inner screw thread 4 with thickened pipe walls, since the extrusion forming down-hole drill rod adopts the technique, thereby the material consumption and the product weight are reduced, and the mechanical strength and the service life of products are effectively improved.

Description

The extrusion modling Down-the-hole rod

Technical field

The utility model relates to a kind of drilling rod that connects rig and drill bit, extrusion modling Down-the-hole rod specifically.

Background technology

At present, general Down-the-hole rod is made up of male joint, bar tube and female joint three parts, and traditional method is that the round steel core print is done at the steel pipe two ends, welds back turning, mills out finished product; Its shortcoming is that consumable material is more, and welding stress is arranged, the defective that fractures from weld is easily arranged.

Summary of the invention

For overcoming the deficiencies in the prior art, the utility model provides a kind of and does not remove material, reduces the material consumption and the extrusion modling Down-the-hole rod in product weight, increase product mechanical strength and application life.

The extrusion modling Down-the-hole rod, form by silk head, the bayonet socket that is arranged on a back of head and the body of rod, described silk head, bayonet socket and the body of rod all are the integral structures of extrusion modling, the silk head is the external thread structure of undergauge thickening, bayonet socket is that even uniform thickness is equidistantly arranged and four symmetrical grooves, and described lever front end is the internal thread that is provided with the tube wall thickening of hollow.

Advantage and good effect:

Because the utility model has adopted above-mentioned technology,, effectively increase product mechanical strength and application life so do not remove material, minimizing material consumption and product weight.

Description of drawings

Fig. 1 is that face shaping axle of the present utility model is surveyed view

Fig. 2 is the longitudinal sectional view of the utility model embodiment 1

Fig. 3 is the longitudinal sectional view of the utility model embodiment 2

The specific embodiment

, be further described the utility model below in conjunction with description of drawings.

The extrusion modling Down-the-hole rod, form by silk 1, the bayonet socket 2 and the body of rod 3 that are arranged on silk 1 rear portion, described silk 1, bayonet socket 2 and the body of rod 3 all are the integral structures of extrusion modling, silk 1 a external thread structure for the undergauge thickening, bayonet socket 2 is that even uniform thickness is equidistantly arranged and four symmetrical grooves, and the described body of rod 3 front ends are the internal thread 4 that is provided with the tube wall thickening of hollow.

Embodiment 1: without core print, only steel pipe press the Len req blanking, put into frock clamp after heating, process molded blank (comprise two place's bayonet sockets and needs are thickeied and the position of reinforcement) with the method for mechanical presses, heat treatment, turning process the connecting thread at two ends.The advantage of this processing method: manufacturing procedure reduces, and does not have material consumption except that processing hear rate and machining screw, and weight is lighter, intensity height, thereby long service life.

Embodiment 2: with the steel pipe blanking, heat the back together with Forging formingAn end core print put into frock clamp together, core print is the member that is provided with the groove of body of rod steel pipe bayonet fittings shape, method with mechanical presses processes blank (comprising thickening of two place's bayonet sockets and needs and the position of strengthening), and heat treatment, turning process the connecting thread at two ends.The advantage of this processing method: than first kind of more weight of way, fewer difficulty do not have material consumption except that processing hear rate and machining screw, and weight is lighter, intensity height, thereby long service life.

The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified to the equivalent embodiment of equivalent variations, in every case be not break away from the technical solutions of the utility model content,, all still belong in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present utility model.

Claims

1, extrusion modling Down-the-hole rod, form by silk head (1), the bayonet socket (2) and the body of rod (3) that are arranged on silk head (1) rear portion, it is characterized in that: described silk head (1), bayonet socket (2) and the body of rod (3) all are the integral structures of extrusion modling, and silk head (1) is the external thread structure of undergauge thickening.

2, extrusion modling Down-the-hole rod according to claim 1 is characterized in that, described bayonet socket (2) is the even uniform thickness of inwall, equidistantly arranges and four symmetrical grooves.

3, extrusion modling Down-the-hole rod according to claim 1 is characterized in that, the described body of rod (3) front end is the internal thread (4) that is provided with the tube wall thickening of hollow.

4, according to claim 1 or 2 or 3 described extrusion modling Down-the-hole rods, it is characterized in that described core print is a forging forming, be provided with member with the groove of body of rod steel pipe bayonet fittings.