CN87203994U

CN87203994U - Four-blade four-point guiding boring apparatus

Info

Publication number: CN87203994U
Application number: CN 87203994
Authority: CN
Inventors: 余平章
Original assignee: NINGXIA NONFERROUS METAL INST
Current assignee: NINGXIA NONFERROUS METAL INST
Priority date: 1987-03-24
Filing date: 1987-03-24
Publication date: 1988-01-20

Abstract

The utility model belongs to the field of metal material cutting tools, especially fitting for boring processing of a small deep hole of brittle rare and precious metal material. The utility model comprises blades, guide blocks, a cutter body and a tool bar. The four blades and guide blocks arranged according to the uniform division of a circle are brazed on the cutter body. The geometric shape and the height of the four blades, the width of front cutting edges and a relative position between the planes composed of the front of the blades are provided with own features. When boring, the cutting force of the four-blade four-point guiding boring apparatus is shared by the four blades, and the utility model has the advantages of steady cutting, favorable effect of chip separation and high cutting efficiency. Using the four-blade four-point guiding boring apparatus can finish boring processing of the small deep hole whose diameter is 20 mm and depth is 50-100 times of the diameter of the small deep hole at one time.

Description

Four-blade four-point guiding boring apparatus

The utility model belongs to the tool for cutting machining field of metal material.The deep hole jacking that is used for metal material is particularly suitable for the small deep hole jacking of fragility rare metallic material.When the characteristics of hollow jacking are from solid bar deep hole processing, utilize the shear action of cutlery and the guide effect of guide pad,, when finishing deep hole machining, obtain the core material of an integral body by means of the continuous chip removal of high pressure cutting oil.Thereby the deep hole jacking is significant to the utilization rate that improves the work metal material.

Deep hole jacking key is the jacking cutter.

Hollow trepanning tool in the existing metal normally carries by cutting edge being given prominence at a cutting tip of the front end of tubulose cutter hub and being positioned at helping most on the circumference that two wear-resisting filler strips of cutter head cutting pressure position constitute.This trepanning tool production efficiency is low, and cutting stress is big, and is not steady, and deep hole and plug that cover comes out are all more coarse, generally also needs to carry out the processing second time.And this trepanning tool only is suitable for the aperture more than φ 50mm, and deep hole is no more than the jacking of 600～700mm than macropore.

The purpose of this utility model is to solve below the φ 50mm, the degree of depth is the small deep hole jacking processing problems of the brittle metal material of 50～100 times of diameters.Be implemented in processing and obtain a whole plug small deep hole time, and the dimensional accuracy, surface smoothness, nonstraightness etc. that guarantee the deep hole that processed and plug all can be guaranteed and do not carry out second time and process.

4 guiding of the utility model four swords trepanning tool is made up of blade (1), (2), (3), (4), guide pad (5), (6), (7), (8), cutter hub (9) and knife bar (10).Cutter hub and knife bar all adopt superior alloy steel to make through machining and heat treatment.Cutter hub and knife bar are integral by threaded connection.Four blades and guide pad are divided into four groups and are brazed on the cutter hub by the orientation shown in circumference five equilibrium and the accompanying drawing 1.It is the height H of the cutting edge of described four blades with respect to vertical cutter hub axis rear end face that relative position between the plane that the width of the geometry of four blades, welding and assembling height, preceding cutting edge and blade front are formed etc. all has many unique distinctions, main feature ₁, H ₂, H ₃, H ₄Unequal, the relation between them is H ₁＞H ₂＞H ₃＞H ₄The width K of four preceding cutting edges of blade ₁, K ₂, K ₃, K ₄Unequal, its relation is K ₁＜K ₂＜K ₃＜K ₄Relative position relation after the welding of four blades is that the front of blade (1) and blade (2) is in the same plane by the cutter hub axis, blade (3) and blade (4) be in by the cutter hub axis with blade (1) another plane vertical with blade (2) plane of living in.

4 guiding of above-mentioned four swords trepanning tool, although the position and the degree of depth of each blade institute cutting workpiece are different in the jacking process, because the effect difference of being brought into play in the cutting of four blade sheet, so can guarantee cutting output is shared by the four blade sheet, each blade is only born about 1/4th of total cutting force, thereby stable cutting, divide bits effective, the stock-removing efficiency height.

It is φ 20mm that 4 guiding of four swords trepanning tool is used to overlap the aperture, and the degree of depth is when the small deep hole in 50～100 times of apertures, and the deep hole that cover comes out and the machining accuracy of plug can reach three grades, and concentricity is 0.02 ‰, and fineness is

～

, nonstraightness is 0.02 ‰.

Description of drawings:

Fig. 1 is the cutaway view and the side view of 4 guiding of four swords of the present utility model trepanning tool.Wherein (1), (2), (3), (4) are blade, and (5), (6), (7), (8) are guide pad, and (9) are cutter hub, and (10) are knife bar.

Fig. 2 for the geometry of expression blade (1), (2), (3), (4), highly and before the schematic diagram that concerns of cutting edge width.

Embodiment:

Pressing 4 of the four swords guiding trepanning tool of structure fabrication shown in the accompanying drawing 1, blade (1), (2), (3), (4), is YW ₁Carbide chip, guide pad also are and the Hardmetal materials of blade with the trade mark that each blade and each guide pad combine as a whole.The preceding cutting edge of blade (1), (2), (3), (4) with respect to the height difference of the rear end face of vertical cutter hub axis is: H ₁Compare H ₂High 0.5mm, H ₂Compare H ₃High 0.5mm, H ₃Compare H ₄High 0.5mm; The width K of the preceding cutting edge of blade (1), (2), (3), (4) ₁, K ₂, K ₃, K ₄Be respectively 1.5mm, 2.5mm, 3.5mm, 4.5mm.

Adopt 4 guiding of above-mentioned four swords trepanning tool can from the solid beryllium rod of the high temperature insostatic pressing (HIP) of φ 70～φ 80 * 1200mm, extract the whole plug of φ 9 * 1150mm.The surface smoothness of plug can reach

, nonstraightness in 0.02mm, extract that deep hole behind the plug is of a size of φ 20 * 1150mm, surface smoothness is

～

Claims

1, a kind of deep hole trepanning tool, form by blade, guide pad, cutter hub and knife bar, it is characterized in that having four blades (1), (2), (3), (4) and four guide pads (5), (6), (7), (8), they are divided into four groups and arrange by branches such as circumference and to be brazed on the cutter hub.

The preceding cutting edge of four blades is H with respect to the height relationships of the rear end face of vertical cutter hub axis ₁＞H ₂＞H ₃＞H ₄The width relation of four preceding cutting edges of blade is K ₁＜K ₂＜K ₃＜K ₄The front of blade (1) and blade (2) is in the same plane by the cutter hub axis, the front of blade (3) and blade (4) be in by the cutter hub axis with blade (1) another plane vertical with blade (2) plane of living in.