CN203253947U - Spring turning tool for slender shaft finish turning - Google Patents

Abstract

The utility model relates to the technical field of lathe processing. In order to solve the technical problem that the slender shaft is not easy to process in mechanical processing, the utility model proposes a slender shaft fine-turning spring turning tool, and the slender shaft fine-turning spring turning tool It is composed of tool holder, turning tool and spring leaf. The turning tool is fixed on the front end of the tool holder. The front end of the tool holder is provided with a transverse groove for installing the turning tool. The utility model makes the surface roughness and dimensional accuracy of the processed slender shaft meet the design requirements.

Description

A Slender Shaft Fine Turning Spring Turning Tool

technical field

The utility model relates to the technical field of lathe processing, in particular to a processing tool for a slender shaft.

Background technique

Machining slender shafts may seem simple in machining, but it is actually the most difficult. The so-called slender shaft refers to the shaft with a length-to-diameter ratio (L/D) greater than 20mm. Due to its poor rigidity, the slender shaft will cause bending, vibration, thermal elongation, and deformation when subjected to cutting force. As the length-to-diameter ratio of the workpiece increases, machining becomes more difficult. Radial bending and jumping are produced under the action of the turning tool during processing, resulting in low dimensional accuracy of the processed workpiece. The turning tools made of high-speed high-speed steel are directly clamped on the intermediate slide tool holder and pressed with screws when used. The machined surface does not meet the design requirements, and either a large number of defective products or scrap. The low dimensional accuracy of the workpiece and the failure of the machined surface to meet the design requirements are the major bottlenecks of the fine-turned slender shaft in machining at present.

Application number is that the Chinese patent of 93103032.3 discloses a kind of magnetic force follower tool rest, and this magnetic force follower tool rest adopts the both sides of turning tool on the tool holder seat to install two strong magnets with adjustable front and rear positions, and is attracted by two strong magnets. The turned slender shaft is used to offset the radial force of the turning tool on the slender shaft and keep the slender shaft stable. However, the tool holder has a complex structure. the

Utility model content

In order to solve the technical problem that the slender shaft is not easy to process in machining, the utility model proposes a spring turning tool for fine turning of the slender shaft, so that the surface roughness and dimensional accuracy of the processed slender shaft can meet the design requirements.

The utility model is realized through the following technical solutions: a spring turning tool for fine turning with a slender shaft. The spring turning tool for fine turning with a slender shaft is composed of a tool holder, a turning tool and a spring piece, and the turning tool is fixed on the tool holder. The front end of the tool rest is provided with a transverse groove for installing turning tools. The knife rest is also provided with a leaf spring, and the knife rest at the bottom of the spring leaf is provided with a through groove, so that there is a buffer space when the spring leaf automatically adjusts the center height of the turning tool when vibration is eliminated.

Preferably, the turning tool is fixed on the front end of the tool holder through a compression screw and a pressing plate. the

Preferably, the tool holder is composed of front and rear parts, and the front and rear parts are connected by transition fit.

Preferably, the spring leaf is arranged at the front part of the knife holder and is in the shape of a ring. Its shape is circular, mainly for the tool post to automatically adjust the center height of the turning tool when there are unfavorable processing factors or vibration, and also has the function of vibration reduction.

Preferably, the turning tool is wide-edged and has the function of smoothing the surface roughness of the workpiece. More preferably, the turning tool head material is selected as high-speed steel (W18cr4v), and the tool life is long.

Compared with the prior art, the beneficial effects of the utility model are:

(1) The utility model has a shock absorbing device, which will not cause the phenomenon of stabbing;

(2) The turning tool is ground into a wide blade type, which has the function of smoothing the surface roughness of the workpiece.

Description of drawings

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

Among them, 1: Turning tool, 2: Press plate, 3: Compression screw, 4: Spring leaf, 5: Through slot, 6: Tool holder.

Detailed ways

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

Example

As shown in Fig. 1, a kind of slender axis finishing turning spring turning tool of the utility model, described slender axis finishing turning spring turning tool consists of knife: 7, turning tool 1, pressing plate 2, 2 hold down screws 3 and Leaf spring 4 is formed, and tool rest 6 front end has the transverse groove that is used to install turning tool usefulness, and tool rest 6 is made up of front and rear two parts, and front and rear two parts are transition fit connection, and the rear part is inserted in the hole of front part. Spring leaf 4 is located at the front portion of knife rest 6 at 2/3 of the distance from the front end, in an annular shape, and the spring leaf bottom knife rest is provided with through groove 5.

When in use, the high-speed steel (W18cr4v) turning tool 1 is finely ground into a wide blade shape, the installation angle is calibrated, the two screws 3 on the pressing plate 2 are pressed, and the whole is installed in the chute at the front end of the tool holder 6 . The workpiece is clamped with one top or two tops, and the auxiliary support is the tool holder, and the elastic rotary top is used. According to the principle of six-point positioning, the X-movement freedom of the workpiece cannot be limited (that is to say, the three-jaw clamping workpiece cannot be too long). Otherwise, the top of the back center will not reach the center hole, and the workpiece will become longer due to thermal deformation during the turning process. Bending, even flying out, while using 30# oil for cooling. Lathe speed v _c =8m/min; feed f=3~5mm/r; cutting depth t=0.15~0.3mm. The cutting effect can reach IT7-8 level, and the efficiency can be improved by 4~6 times.

Claims (5)

1. slender axles finish turning heal bit, it is characterized in that, described slender axles finish turning heal bit is comprised of knife rest (6), lathe tool (1) and spring leaf (4), lathe tool (1) is fixed on the front end of knife rest (6), also be provided with spring leaf (4) on knife rest (6), the knife rest (6) of spring leaf (4) bottom is provided with groove (5).

2. a kind of slender axles finish turning heal bit according to claim 1, is characterized in that, lathe tool (1) is fixed on the front end of knife rest (6) by pressing plate (2), several housing screws (3).

3. a kind of slender axles finish turning heal bit according to claim 1, is characterized in that, knife rest (6) is comprised of front and back two parts, and front and back two parts are that interference fits connects.

4. a kind of slender axles finish turning heal bit according to claim 1, is characterized in that, lathe tool (1) is wide sword type.

5. according to claim 1 or 3 described a kind of slender axles finish turning heal bits, is characterized in that, spring leaf (4) is located at the front portion of knife rest (6), is annular.

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