CN202045393U

CN202045393U - Cutter for machining high-precision small planes

Info

Publication number: CN202045393U
Application number: CN2011200606494U
Authority: CN
Inventors: 朱理刚
Original assignee: Shanghai Aerospace Equipments Manufacturer Co Ltd
Current assignee: Shanghai Aerospace Equipments Manufacturer Co Ltd
Priority date: 2011-03-09
Filing date: 2011-03-09
Publication date: 2011-11-23
Anticipated expiration: 2021-03-09

Abstract

The utility model discloses a cutter for machining high-precision small planes of thin-wall deep-cavity parts, which comprises a cutter body 1, a cutter seat 2 and a screw 3. The cutter body 1 is fixed in a groove of the cutter seat 2 through the screw 3; the rear part of the cutter seat 2 is connected with a machine tool spindle basic handle. The cutter for machining the high-precision small planes uses hard alloy materials to scrape workpieces through the specially-designed double cutter-point cutter body 1, has good rigidity and small cutting force, and can control the geometric tolerance of the parts; the parallelism error of two planes is small than 0.005mm, the surface roughness is 0.8-1.6, and the machined cutting texture is clear and flat; and the cutter for machining the high-precision small planes meets the design requirements of the high-precision planes of thin-wall small parts in the aerospace field.

Description

A kind of high accuracy facet tool

Technical field

The utility model relates to a kind of cutter, is specifically related to a kind of process tool that is used for processing thin-walled, dark chamber class part high precision plane.

Background technology

Often run into thin-walled, dark chamber class part aborning, particularly there is the high-precision part of Geometrical Tolerance Principle on two planes, fine finishining is generally undertaken by the mode of line cutting or Milling Process, but, processing effect does not often reach the requirement of detail of design, cutting deformation because of working position, the strain of material, factors such as part, cutter rigidity deficiency, cause the roughness of plane processing, the depth of parallelism on two planes, flatness and relevant processing positions of elements precision with other and size all are difficult to control.Line cutting or Milling Process qualification rate that this type of part is general are low, thereby cause production cost height, and the process-cycle can't be grasped.A kind of manufacturing process of efficient stable thus the processing of the high precision plane of thin-walled, dark chamber class part has been proposed, by designing the part that a kind of cutter utilizes milling machine to process to meet design requirement.At above-mentioned situation and thin-walled, the poor rigidity of dark chamber class part and the main processing characteristic of strain, geometric parameters such as the angle of wedge of cutter, auxiliary angle are designed and test, in conjunction with the selection of cutting parameter, manufacture and design double-pole point Shave tool.

The utility model content

The utility model purpose is to solve the processing problems of thin-walled, dark chamber class part high precision plane.

This cutter considers that the part material of being processed is an aluminium alloy in design and test, the part processing poor rigidity, and finished surface precision and dimension precision requirement height are so consider to some extent in the selection of Tool in Cutting angle.Aluminum alloy materials strength degree hardness is lower, and cutting force is little, and again because of good heat conductivity, cutting temperature is low, so select bigger anterior angle γ (20 °～30 °), tool cutting edge angle

Contain (Si) in the aluminium alloy, and the compound of silicon is the very high particle of hardness, can aggravates the wearing and tearing of cutter, for the relief angle α that also selection is bigger (8 °～12 °) that reduces wear.For overcoming the part processing poor rigidity, reduce cutter incision instant impact, cutting is light and handy, reduces built-up-edge and forms, and it is smooth to go out bits, and the angle of wedge β of cutter is controlled at 40 °～50 ° scopes.Front clearance

Size select influence the roughness of surface to be machined, especially in the middle and later periods of processing, increase the contact-making surface with finished surface after the tool wear, vibration can appear, chatter mark, thus repeatedly in the cutting test discovery with front clearance

It is best to be controlled at 10 °～15 ° effects.

Equally, in the cutting parameter, the too fast easy initiation covibration of rotating speed is generally got 250～300 rev/mins, because of the area to be machined is the about 1/3 of the latter half in the whole cutting diameter, so the depth of cut can be got more greatly 60～80mm/min.

Based on the batch machining of part and the characteristics of digital control processing, common YT15 carbide alloy wearability, the hardness height, the sharp characteristics of tool sharpening satisfy instructions for use, because properties of materials and fine finishining chipping allowance are less, the poor slightly shortcoming of the toughness of YT15 can not considered.

This cutter comprises: cutter hub 1, tool rest 2, screw 3.Cutter hub 1 is fixed in the groove of tool rest 2 by screw 3.The alternative line cutting of this cutter, Milling Process mode, working (machining) efficiency improves.As process the 15cm of aluminum alloy materials ²Area only 0.25 hour, raise the efficiency 2 times.Part form and position tolerance precision is controlled, the equality degree error＜0.005mm on two planes, and surface roughness is 0.8～1.6, and clean mark is cut in processing, and is smooth; Do not have the latent step that stays of all tooth millings and the cementation zone of line cutting processing, superficial makings is coarse.Tool in Cutting is light and handy, and resistance is little, and sharpening is convenient, low cost of manufacture.The Tool in Cutting position is common YT15 carbide alloy, and can reach 7～8 hours service life, can guarantee batch machining basically midway without tool changing, has saved the non-cutting time of tool setting, trial cut, for producing in batches and advantage has been created in digital control processing.The quality of product, qualification rate to stabilize and increase effect obvious.For enterprise provides processing thin-walled plane manufacturing process.

Description of drawings

Fig. 1 is the structural representation front view of the utility model cutter hub

Fig. 2 is the structural representation vertical view of the utility model cutter hub

Fig. 3 is a point of a knife angle schematic diagram

Fig. 4 is the utility model cutter clamping structural representation

Fig. 5 is that the utility model cutter is used to cut schematic diagram

Wherein: 1 is cutter hub; 2 is tool rest; 3 is screw; 100 is part.

The specific embodiment

Below in conjunction with the drawings and specific embodiments, further set forth the utility model.These embodiment be interpreted as only being used to the utility model is described and be not used in the restriction protection domain of the present utility model.After the content of having read the utility model record, those skilled in the art can make various changes or modifications the utility model, and these equivalences change and modification falls into the utility model claim institute restricted portion equally.

As shown in Figure 1 and Figure 2, the process tool that is used for processing thin-walled and dark chamber class part high precision plane that the utility model preferred embodiment provides, comprise cutter hub 1, tool rest 2 and screw 3, cutter hub 1 is fixed in the groove of tool rest 2 by screw 3, the rear portion of tool rest 2 connects the basic handle of a knife of machine tool chief axis, cutter hub 1 has the double-pole point, and its material is for being the YT15 carbide alloy.

As shown in Figure 4, cutter hub 1 is put into the groove of tool rest 2, tighten fixingly with screw 3, the rear portion of tool rest 2 is connected with machine tool chief axis basis handle of a knife and gets final product.In actual the use, wearing and tearing are arranged, only need unclamp screw 3, cutter hub 1 is taken off, reinstall cutter hub 1 behind the reconditioning cutter hub 1 and get final product as cutter hub 1.

Specify the course of work that the utility model process tool is used for processing thin-walled and dark chamber class part high precision plane below in conjunction with accompanying drawing.

As shown in Figure 5,2 rotations of machine tool chief axis rotating band moving knife seat, 1 rotation of tool rest 2 rotating band moving knife bodies.Cutter hub 1 is scraped turning work piece by the double-pole point of particular design, the cutter good rigidly, cutting force is little, part 100 form and position tolerance precision are controlled, the equality degree error＜0.005mm on two planes, surface roughness is 0.8～1.6, and clean mark is cut in processing, smooth, satisfy the designing requirement of thin-walled finding high precision plane in the space industry.

Claims

1. process tool that is used for processing thin-walled, dark chamber class part high precision plane, it is characterized in that: this cutter comprises cutter hub (1), tool rest (2), screw (3), cutter hub (1) is fixed in the groove of tool rest (2) by screw (3), and the rear portion of tool rest (2) is connected with machine tool chief axis basis handle.

2. a kind of process tool that is used for processing thin-walled, dark chamber class part high precision plane according to claim 1; It is characterized in that using the YT15 Hardmetal materials to scrape turning work piece by design double-pole sharp knife body (1).