CN207930001U - A kind of adjustable fine boring tool of the special purpose machine tool of elongated hole - Google Patents

Abstract

An adjustable fine-boring tool for a special machine tool for slender holes, including a cutter body and a cutter bar; The knife body is outside the knife body, and the eccentric sleeve is offset against the knife body; the blade is fixed on the top of the knife bar; compared with the prior art, the knife body is more stable during rotation through the function of the base and the eccentric sleeve, and at the same time the knife body and the The cutter head is assembled by thermal expansion, and the relationship between the cutter body and the cutter head is more stable, so that the blade on the cutter head has better stability, and this method is easy to operate and is suitable for mass production.

Description

An Adjustable Fine Boring Tool for Special Machine Tool with Slender Holes

technical field

The utility model belongs to the technical field of mechanical processing, in particular to an adjustable fine boring tool for a special machine tool for elongated holes.

Background technique

Boring tool is a kind of hole processing tool, generally with round handle, and there are also larger workpieces using square tool holders, which are generally found in vertical lathes. The most commonly used occasions are for machining inner holes, reaming holes, profiling, etc. . But not only the inner hole can be processed, the outer circle of the end face can also be processed, but it is not used in this way. The boring tool has one or two cutting parts, which are specially used for rough machining, semi-finishing or machining of existing holes. Finishing tools, boring tools can be used on boring machines, lathes or milling machines.

The boring tool is an indispensable and important tool in precision hole machining. The precision of the hole can reach IT6 level, and the surface roughness can reach Ra0.8～1.6μm. Common types include threaded fine-tuning boring tool and eccentric fine-tuning boring tool Knife, chute-type double-edged boring tool and floating boring tool, etc. These fine-tuning boring tools have their own characteristics and are widely used in actual production.

When processing the elongated hole in the prior art, it usually requires a larger feed rate of the tool, which requires a longer and thinner tool holder, which causes the blade to shake during the machining process because the tool holder is too thin. Thereby affecting the processing accuracy of the blade to the workpiece, and easily causing damage to the blade simultaneously, affecting the service life of the blade.

Chinese Patent No. CN102145390A discloses a method for finishing the inner hole of a slender tube part, which is characterized in that the step size at both ends of the inner hole of the slender tube part is finely bored on a horizontal lathe using a floating boring tool. During the process, the long tool bar drives the floating boring tool embedded in the rectangular hole in the middle to rotate, so as to realize the finishing of the inner hole of the slender cylindrical part.

The above-mentioned processing method uses a floating boring tool to fine-bore the stepped dimensions at both ends of the inner hole of the slender cylindrical part on a horizontal lathe. Due to the particularity of the knife, and the complex structure of this processing method, it is not suitable for mass processing, and the cost is relatively high.

Utility model content

The utility model aims at overcoming the defects in the above-mentioned prior art, and provides a safe, reliable, easy-to-operate, and convenient adjustable fine-boring tool for a special machine tool with elongated holes.

In order to achieve the above purpose, the technical solution adopted by the utility model is: an adjustable fine boring tool for a special machine tool with slender holes, including a cutter body and a cutter bar; the cutter body and the cutter bar are fixedly connected, and the bottom of the cutter body An eccentric sleeve matching the cutter body is provided, the eccentric sleeve is set on the cutter body, and the eccentric sleeve is offset against the cutter body; a blade is fixed on the top of the cutter rod.

As a preferred solution of the utility model, the cutter rod is partially inserted into the cutter body, and the bottom of the cutter rod is in contact with the cutter body.

As a preferred solution of the utility model, a fixedly connected base is provided outside the cutter body, and a connecting rod is connected between the base and the cutter body.

As a preferred solution of the present invention, the bottom of the base is flush with the top of the eccentric sleeve.

As a preferred solution of the present invention, the base is provided with several threaded holes for locking the base.

As a preferred solution of the present invention, the side of the base is also provided with several matching holes for adjusting the base.

As a preferred solution of the present invention, the eccentric sleeve is provided with bolts for locking the eccentric sleeve.

As a preferred solution of the utility model, the knife rod is detachably connected to the blade.

As a preferred solution of the present invention, the base, the cutter body and the connecting rod are integrally formed.

The beneficial effect of the utility model is: compared with the prior art, the cutter body is more stable in the rotation process through the function of the base and the eccentric sleeve, and at the same time the cutter body and the cutter head are assembled through thermal expansion, and the cutter body and the The cutter heads are more stable, so that the blade on the cutter head has better stability, and this method is easy to operate and is suitable for mass production.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the top view of the utility model;

Reference signs in the figure: cutter body 1, cutter bar 2, eccentric sleeve 3, base 4, connecting rod 5, threaded hole 6, matching hole 7, blade 8, bolt 9.

Detailed ways

Below in conjunction with accompanying drawing, the utility model embodiment is described in detail.

As shown in Figure 1-2, an adjustable fine boring tool for a special machine tool for slender holes includes a cutter body 1 and a cutter bar 2; the cutter body 1 and the cutter bar 2 are fixedly connected, and the bottom of the cutter body 1 is provided with a The eccentric sleeve 3 matching the body 1, the eccentric sleeve 3 is set outside the cutter body 1, and the eccentric sleeve 3 is offset against the cutter body 1; the blade 8 is fixed on the top of the cutter rod 2, and the cutter rod 2 is partially inserted into the cutter body 1, and The bottom of the cutter bar 2 is in contact with the cutter body 1, and the cutter bar 2 is made of heavy metal material, which is convenient for processing the groove shape of the blade and can achieve a certain shockproof effect.

The cutter body 1 is a hollow structure, and there is a through hole in the cutter body 1. The through hole is used to match the cutter bar 2, and the cutter body 1 and the cutter bar 2 are assembled by thermal expansion. Firstly, the cutter body 1 Put it in high-temperature oil for cooking. Under the principle of thermal expansion and cold contraction, the through hole in the cutter body 1 becomes larger under the effect of high temperature. At this time, put the bottom of the cutter bar 2 into the cutter body 1 until the cutter body The bottom of the rod 2 is in contact with the cutter body 1. After cooling, the through hole of the cutter body 1 shrinks, so that the cutter rod 2 and the cutter body 1 are connected together. At this time, the cutter rod 2 and the cutter body 1 are interference fit, so that the cutter body 1 It is fixedly connected with the knife bar 2.

There is a base 4 fixedly connected outside the cutter body 1, the base 4 is annular, and a connecting rod 5 is connected between the base 4 and the cutter body 1, and the connecting rod 5 is used to reinforce the connection between the cutter body 1 and the base 4. Stability between, under the effect of connecting rod 5, form triangle between cutter body 1 and base 4, because triangle has better stability, make base 4 and cutter body 1 more stable, thereby reduce The impact of the vibration of the base 4 on the cutter body 1.

The bottom of the base 4 is flush with the top of the eccentric sleeve 3. The base 4 is provided with four threaded holes 6 for locking the base 4. The side of the base 4 is also provided with four matching holes 7 for adjusting the base 4. The four threaded holes 6 are used to fixedly connect the base 4 to the fixture, so that the cutter body 1 and the base 4 are fixedly connected to the fixture at the same time, improving the stability of the cutter body 1 and the base 4, thereby improving the stability of the cutter body 2 and the blade. 8 stability, four threaded holes 6 are distributed along the circle center circle of base 4; The matching holes 7 are used to match the connecting rods, and the rotation of the base 4 is realized by pulling the connecting rods, so as to adjust the position of the blade 8. The design of the four matching holes 7 makes it easier for the operator to connect the connecting rods. Thus adjusting the block 8.

The eccentric sleeve 3 is provided with a bolt 9 for locking the eccentric sleeve 3, so that the eccentric sleeve 3 is fixed on the cutter body 1. At the same time, the eccentric sleeve 3 is connected with the fixture. When the fixture drives the cutter body 1 to rotate, the eccentric sleeve 3 Rotation to change the rotation size of the tool tip, thereby controlling the hole size accuracy of the workpiece to ensure the machining accuracy of the blade 8 during the machining process.

The cutter bar 2 is detachably connected to the blade 8, so that the blade 8 on the cutter bar 2 can be replaced, so as to cope with boring holes with different requirements. The base 4, the cutter body 1 and the connecting rod 5 are integrally formed, so that the base 4 , The cutter body 1 and the connecting rod 5 have better stability, thereby reducing the impact of vibration on the blade 8 .

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model; Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Although this article uses many reference signs in the figure: cutter body 1, cutter bar 2, eccentric sleeve 3, base 4, connecting rod 5, threaded hole 6, mating hole 7, blade 8, bolt 9 and other terms, but The possibility of using other terms is not excluded; the use of these terms is only to describe and explain the essence of the utility model more conveniently; interpreting them as any kind of additional limitation is contrary to the spirit of the utility model.

Claims (9)

1. An adjustable fine boring tool for a special machine tool for slender holes, characterized in that it includes a cutter body (1) and a cutter bar (2); the cutter body (1) and the cutter bar (2) are fixedly connected, The bottom of the cutter body (1) is provided with an eccentric sleeve (3) matching the cutter body (1), the eccentric sleeve (3) is set outside the cutter body (1), and the eccentric sleeve (3) is connected offset; the blade (8) is fixed on the top of the knife rod (2). 2. The adjustable fine boring tool for a special machine tool for slender holes according to claim 1, characterized in that, the cutter bar (2) is partially inserted into the cutter body (1), and the cutter bar (2) The bottom is against the cutter body (1). 3. The adjustable fine boring tool for a special machine tool for slender holes according to claim 2, characterized in that, the cutter body (1) is provided with a fixedly connected base (4), the base ( 4) A connecting rod (5) is connected with the cutter body (1). 4. The adjustable fine boring tool for a special machine tool for slender holes according to claim 3, characterized in that the bottom of the base (4) is flush with the top of the eccentric sleeve (3). 5. The adjustable fine boring tool for a special machine tool for slender holes according to claim 4, characterized in that the base (4) is provided with several threaded holes for locking the base (4) (6). 6. The adjustable fine boring tool for a special machine tool for slender holes according to claim 5, characterized in that, the side of the base (4) is also provided with several matching holes for adjusting the base (4) (7). 7. The adjustable fine boring tool for a special machine tool for slender holes according to claim 1, characterized in that, the eccentric sleeve (3) is provided with a bolt (9) for locking the eccentric sleeve (3) ). 8 . The adjustable fine boring tool for a special machine tool for elongated holes according to claim 2 , characterized in that the tool holder ( 2 ) is detachably connected to the blade ( 8 ). 9. The adjustable fine boring tool for a special machine tool for elongated holes according to claim 6, characterized in that the base (4), cutter body (1) and connecting rod (5) are integrally formed .