CN201644879U

CN201644879U - Internal cooling depth drill

Info

Publication number: CN201644879U
Application number: CN2010201482723U
Authority: CN
Inventors: 江凤阳; 张东升; 梁海阳
Original assignee: SHENYANG YUANDA COMPRESSOR MANUFACTURING Co Ltd
Current assignee: Shenyang Yuanda Compressor Co Ltd
Priority date: 2010-04-02
Filing date: 2010-04-02
Publication date: 2010-11-24
Anticipated expiration: 2020-04-02

Abstract

The utility model provides an internal cooling depth drill, which solves the problem that: a depth hole at the tail part of a piston rod is processed by a lathe and the cooling liquid can not be injected into the hole and when drilling the hole, high temperature is generated on a workpiece and the cutting speed of a drill head is effected to result into driller head edge annealing. The key points of the utility model are that: the drill head handle drills an axial limber channel and a radial limber hole is formed by drilling the back part of a drill head cutting groove and the axial limber channel is communicated with the radial limber hole and a drill rod is a seamless steel tube with one end welded with the drill head handle and another end designed into a joint shape connected with a rubber hose. The drill rod is inserted into a hole of a positioning block. A cooling liquid passes through the drill rod, the limber channel of the drill head handle and the limber hole to cool the drill head. The drilling speed is increased and drill head wear and edge annealing are prevented.

Description

Interior cold depth drill

Technical field

The utility model relates to the depth drill that the lathe in the field of machining uses.

Background technology

Piston rod is one of important part of Reciprocting piston compressor.Because of the piston rod assembly technology needs, it is that φ 22mm～φ 30mm, the degree of depth are the deep hole of 1.2m～1.8m that a lot of piston rod afterbodys need a diameter, use this deep hole of C63 machined into, be that piston rod is clamped on the chuck of C63 lathe, behind the centre frame location, at the tailstock taper hole corresponding drill bit is installed and is carried out deep hole machining.Because Kong Taishen, in order to prevent a hole drill inclined to one side, must use length to hole successively successively as 200mm, 400mm, 600mm, 1000mm, drill bit that external diameter is identical, use at last the 1.8m lengthening drill bit with hole drill to 1.8m.Tail wheel on the rotation tailstock that will require great effort very much during boring, labour intensity is very big.Because Kong Taishen can't be with in the cooling fluid hand-hole, workpiece produces high temperature during boring, has had a strong impact on the cutting speed of drill bit, also causes the annealing of drill bit blade easily.This is one of relatively more crucial difficult problem of state's inner compressor industry, needs the new-type drill bit of design to solve this difficult problem.

Summary of the invention

For solving the problems of the technologies described above, the purpose of this utility model is to provide a kind of interior cold depth drill.

The purpose of this utility model is achieved in that drill bit is made up of the bit edge of W18Cr4V, the bit cutting groove and the bit sub of 45# steel, it is characterized in that: utilize bit cutting groove and bit sub to be the characteristics of 45# steel, at the bit sub auger spindle to waterway, bore radially limbers at the rear portion of bit cutting groove, axially waterway is communicated with radial hole; The drill body bar is a seamless steel pipe, the welding of one end and bit sub, and the other end is designed to the joint geometry that can be connected with sebific duct.

Using method is: utilize the slip crate on the lathe to drive stock removal actions such as depth drill is holed, withdrawing, in the hole that adds the piston rod in man-hour (workpiece) rotation, drill bit does not rotate.Sebific duct is inserted the drill body knock-off joint, inject cooling liquid in the sebific duct, cooling fluid is the drill bit cooling through the axial waterway of drill body bar inner chamber, bit sub, radially limbers outflow.

Compared with prior art, the beneficial effects of the utility model are: increased substantially penetration rate, avoided drill bit too fast because of penetration rate, bit wear that causes and blade annealing phenomenon, both improve drilling quality, prolonged the service life of drill bit again, alleviated working strength of workers.

Description of drawings

Further specify the utility model below in conjunction with accompanying drawing.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the cutaway view of Fig. 1 along the A-A line.

The specific embodiment

Referring to Fig. 1, drill bit is made up of the bit edge 1 of W18Cr4V, the bit cutting groove 2 and the bit sub 3 of 45# steel, utilize bit cutting groove and bit sub to be the characteristics of 45# steel, at the bit sub drill diameter is the axial waterway 31 of 5mm, bore at the rear portion of bit cutting groove two symmetries, diameter is the radially limbers 21 of 3mm, axially waterway is communicated with two radial holes; Drill body bar 4 is a seamless steel pipe, the welding of one end and bit sub, and the other end is designed to the joint geometry 41 that can be connected with sebific duct.Sebific duct is inserted the drill body knock-off joint, inject cooling liquid in the sebific duct, cooling fluid is the drill bit cooling through the axial waterway of drill body bar inner chamber, bit sub, radially limbers outflow.

It also has locating piece 5, referring to Fig. 2, the hole 52 that can insert the drill body bar is arranged on the locating piece, and there is trip bolt 51 side in this hole.During use, the drill body bar is inserted in the hole of locating piece, determine the position of locating piece again according to the degree of depth in the hole that will process, determine back trip bolt screwed in place, during such as the hole of machining piston bar afterbody, the degree of depth according to this hole is 1.8m, the left end that locating piece is installed in is apart from piston rod 1 afterbody 1.8m, locating piece 5 is fastened on the lathe cutter platform again, so just can utilize the slip crate on the lathe to drive stock removal actions such as depth drill is holed, withdrawing, get out the dark hole of 1.8m, the centre need not more bit change.

Claims

1. cold depth drill in a kind, drill bit is made up of bit edge, bit cutting groove and bit sub, it is characterized in that: to waterway, bore radially limbers at the rear portion of bit cutting groove at the bit sub auger spindle, axially waterway is communicated with radial hole; The drill body bar is a seamless steel pipe, the welding of one end and bit sub, and the other end is designed to the joint geometry that can be connected with sebific duct.

2. according to described interior cold, the adjustable depth drill of claim 1, it is characterized in that: it also has locating piece, and the hole that can insert the drill body bar is arranged on the locating piece, and there is trip bolt the side in this hole, and the drill body bar inserts the hole of locating piece.