CN201283457Y

CN201283457Y - Stepped knife for expanding deep hole

Info

Publication number: CN201283457Y
Application number: CNU2008201134060U
Authority: CN
Inventors: 赵重阳
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2008-09-18
Filing date: 2008-09-18
Publication date: 2009-08-05
Anticipated expiration: 2018-09-18

Abstract

The utility model discloses a step hole enlarging tool for deep holes, which adopts a step hole enlarging tool with four edges and a guide strip structure comprising a cutting portion and a guide portion, wherein a little allowance cutting blade is adopted on the front end of the step hole enlarging tool, an aperture hole enlarging tool and a guide strip structure are adopted in the middle, wherein a guide strip is arranged on the rear portion of the aperture hole enlarging tool, and an aperture chamfering hob cutting blade is adopted on the rear end. Compared with the prior art, the hole enlarging tool of the utility model can prevent the vibration of the tool, guarantee the straightness, the roughness and the precision of holes, in particular to the precision of the deep holes.

Description

Deep hole counterboring with step core drill cutter

Technical field

The utility model relates to a kind of deep hole cornish bit, specifically is used for the cornish bit that deep hole processing is used, especially the cornish bit in the higher and deep hole of requirement on machining accuracy.

Background technology

Often have various deep holes in some plant equipment, at present, deep hole all is the way processing of adopting subdrilling, expand, finish reaming at last.But because the hole is deep, because surplus is bigger, the radial component that Tool in Cutting produced when adding chamfering produces serious vibration inevitably in reaming.Consequently cutting can't normally be carried out, even the hole that processes also can't guarantee linearity and its status requirement in hole, so that produces and can't carry out or produce waste product.

For the semifinishing of the high deep hole of required precision, adopt following two kinds of methods at present usually: (1) adopts the form of special plane to process, the form of guiding before and after cutter adopts; (2) adopt the form of Cutter Body Processing with Machining Center to utilize the way of boring to process.The weak point of first method is that equipment has high input, sometimes design of part determined to adopt leading to, promptly use special plane also to have no idea to realize its processing.The weak point of the second way is that efficient is low, and cutter vibration in processing is bigger, can not protect processing precision of products.

Summary of the invention

At the deficiencies in the prior art, the utility model provides a kind of practical cornish bit that is used to improve deep hole semifinishing precision, can improve the precision of deep hole during this cornish bit deep hole processing greatly, also can enhance productivity simultaneously, the utility model cornish bit is applicable to the semifinishing of the deep hole of common requirement, is more suitable in the semifinishing of the higher deep hole of required precision.

The utility model deep hole is as follows with the counterboring with step core drill knife structure: adopt four land gib block structure counterboring with step core drill cuttves, comprise cutting tip and targeting part, counterboring with step core drill cutter front end adopts little surplus cutting edge, the middle aperture cornish bit that adopts adds the gib block structure, gib block is arranged on cornish bit rear portion, aperture, and aperture rose reamer cutting edge is adopted in the rear end.

The utility model deep hole adopts ladder four land gib block structures with the counterboring with step core drill cutter, comprise the little surplus cornish bit of front end, the little surplus cornish bit of front end plays leading to effect simultaneously, and the middle aperture cornish bit that adopts adds the gib block structure, and the form of aperture rose reamer is adopted in the rear end; Wherein the front end cornish bit adopts 90 ° of tool cutting edge angles, and diameter is approximately 0.5～1mm than bottom outlet, and margin width adopts 0.3～0.5mm; 0.5 * 45 ° of tool cutting edge angle of median pore radius cornish bit, cornish bit preferably adopt the form of band chamfering; Middle gib block targeting part diameter is than the little 0.005mm of aperture cornish bit, gib block seamed edge rounding R0.4mm, and gib block axially is provided with or is less than 30 ° of settings with the axial angle of cornish bit along cornish bit, and gib block can be provided with 2～6, preferred 4.

The utility model deep hole is with in the counterboring with step core drill cutter, and " four swords " is meant that cutter has four cutting blades in same cross section, and " four swords " structure comprises the little surplus cornish bit of front end, median pore radius cornish bit, aperture, rear end rose reamer.Can adopt " four guiding " structure, promptly cutter has four gib blocks in same cross section.

The utility model drill bit fore-end adopt to adopt 90 ° of tool cutting edge angles guarantee the linearity in hole play simultaneously cutter leading to effect, vibration when preventing the cutting of median pore radius cornish bit has improved the durability of cutter and has guaranteed the precision in hole.Partly adopt 0.5 * 45 ° of tool cutting edge angle to increase the durability of cutter at the median pore radius cornish bit; The diameter difference control of middle guiding further guarantees the precision of reaming within the specific limits, produces vibration when also guaranteeing simultaneously rear end rose reamer cutting.Owing to adopt technique scheme, the utlity model has following beneficial effect: solved common cornish bit and caused the problem that machining accuracy is not high or have no idea at all because of the existence that deep hole is arranged, be not only applicable to the processing of the deep hole of common requirement, and be more suitable in the processing of the high deep hole of required precision, and can guarantee positional precision, the linearity requirement of machining hole, and be not subjected to the influence of deep hole tools poor rigidity.

Description of drawings

Fig. 1 is a kind of concrete cornish bit project organization figure of the utility model;

Fig. 1-the 1st, the L-L of Fig. 1 is to sectional view;

Fig. 1-2 is that the H-H of Fig. 1 is to sectional view;

Fig. 1-the 3rd, the K-K of Fig. 1 is to sectional view;

Fig. 1-the 4th, the M-M of Fig. 1 is to sectional view;

Fig. 2 is a kind of concrete cornish bit structure diagram of the utility model;

A kind of concrete cornish bit of Fig. 3 the utility model concerns schematic diagram with machining hole position.

Reference numeral:

The little surplus cornish bit of 1-front end; 2-aperture cornish bit; The 3-gib block; 4-inner cold water hole; The 5-rose reamer.

The specific embodiment

As Fig. 1,1-1,1-2,1-3, shown in the 1-4, the utility model deep hole is with in the counterboring with step core drill cutter, and I ladder of cornish bit adopts 90 ° of tool cutting edge angles, requires its diameter than the about 0.5～1mm of bottom outlet; II ladder adopts 0.5 * 45 ° of tool cutting edge angle, and the aperture of its diameter and requirement is the same; III ladder is used for the aperture chamfering and uses; Gib block is set between II and III ladder, and the diameter of gib block is than II the little 0.005mm of counterboring with step core drill cutter diameter.

The utility model adopts the counterboring with step core drill cutter of four swords, four guiding, cornish bit adopts the form of welding carbide alloy, and preferably cold form in the employing band, and each cutting edge adopts special cooling water hole, be convenient to the cooling of process, improve cutter life and be beneficial to chip removal cutter.Refacing of cutter can grind at special numerically control grinder, also can grind with common manual grinding machine, grinding method be those skilled in the art technology on top of.

Below in conjunction with accompanying drawing the specific embodiment is illustrated.

The utility model deep hole is with in a kind of concrete structure of counterboring with step core drill cutter, adopt four swords, four guiding counterboring with step core drill cuttves cold in the band, the little surplus cornish bit of front end (shown among Fig. 2 1), adopt bigger land can play cutter leading to effect, adopt 90 ° of tool cutting edge angles to guarantee the position degree and the linearity in holes simultaneously.The cornish bit mid portion is that aperture cornish bit and four gib blocks (shown among Fig. 22 and 3) have guaranteed that like this cutter is steady in the process of whole cutting, can not make vibration cutting, and further guaranteed the precision of reaming when also guaranteeing the aperture chamfering simultaneously owing to the effect of radial load.

It should be noted that at last: above embodiment only in order to the explanation the utility model and and the described technical scheme of unrestricted the utility model; Therefore, although this specification has been described in detail the utility model with reference to each above-mentioned embodiment,, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the utility model; And all do not break away from the technical scheme and the improvement thereof of spirit and scope of the present utility model, and it all should be encompassed in the claim scope of the present utility model.

Claims

1, a kind of deep hole counterboring with step core drill cutter, it is characterized in that: adopt four land gib block structure counterboring with step core drill cuttves, comprise cutting tip and targeting part, counterboring with step core drill cutter front end adopts little surplus cutting edge, the middle aperture cornish bit that adopts adds the gib block structure, gib block is arranged on cornish bit rear portion, aperture, and aperture rose reamer cutting edge is adopted in the rear end.

2, according to the described cornish bit of claim 1, it is characterized in that: gib block targeting part diameter is than the little 0.005mm of cornish bit section diameter.

3, according to the described cornish bit of claim 1, it is characterized in that: the front end cornish bit adopts 90 ° of tool cutting edge angles, and diameter is than the big 0.5～1mm of bottom outlet.

4, according to the described cornish bit of claim 3, it is characterized in that: the margin width of front end cornish bit adopts 0.3～0.5mm.

5, according to the described cornish bit of claim 1, it is characterized in that: the median pore radius cornish bit adopts 0.5 * 45 ° of tool cutting edge angle.

6, according to the described cornish bit of claim 1, it is characterized in that: the median pore radius cornish bit adopts the form of band chamfering.

7, according to the described cornish bit of claim 1, it is characterized in that: middle gib block seamed edge rounding.

8, according to the described cornish bit of claim 1, it is characterized in that: middle gib block seamed edge rounding R0.4mm.

9, according to claim 1 or 7 described cornish bits, it is characterized in that: middle gib block is provided with 2～6.

10, according to the described cornish bit of claim 1, it is characterized in that: cornish bit adopts cold form in the band.