CN215549887U

CN215549887U - Inclined plane T type cutter suitable for processing impeller class ceramic powder inner chamber

Info

Publication number: CN215549887U
Application number: CN202022110391.6U
Authority: CN
Inventors: 房成浩; 姚相民; 马玉琦; 李奇; 蔡德奇; 周斌
Original assignee: Hangzhou Dahe Jiangdong New Material Technology Co ltd
Current assignee: Hangzhou Dahe Jiangdong New Material Technology Co ltd
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2022-01-18
Anticipated expiration: 2030-09-23

Abstract

The utility model discloses an inclined plane T-shaped cutter suitable for machining an inner cavity of ceramic powder such as an impeller, which comprises a T-shaped cutter seat and a blade, wherein the blade is fixed on the T-shaped cutter seat, the cutting edge of the blade forms a cylindrical surface taking a rotating shaft as a symmetry axis during rotating machining, and an acute angle or an obtuse angle is arranged between the length direction and the rotating direction of the cutting edge of the blade. The utility model has the following beneficial effects: (1) the inclined arrangement of the blades reduces the processing contact surface and the stress of the product, and solves the problem that gaps and cracks are generated in the characteristics of the processed ceramic entity and the hole grooves alternately; (2) the shape of the blade ensures that the product characteristics are qualified; (3) the machining efficiency is high, and the precision is high.

Description

Inclined plane T type cutter suitable for processing impeller class ceramic powder inner chamber

Technical Field

The utility model relates to the technical field of cutters, in particular to a bevel T-shaped cutter suitable for machining an inner cavity of an impeller type ceramic powder body.

Background

With the increasing development of the properties and processing techniques of ceramic materials, ceramic products are gradually developed from the earliest crafts into the present special ceramics with various specific industrial properties. Compared with metal materials, the ceramic material has the characteristics of high temperature resistance, wear resistance, corrosion resistance, high hardness, no metal pollution, insulation and the like, and has excellent effects in various devices. With the wide application of ceramic materials, some parts which are originally made of metal materials are gradually replaced by the ceramic materials, but the ceramic materials are brittle, the processing difficulty is far greater than that of the metal materials, gaps and cracks are easy to generate in the processing process, the processing difficulty is high, and even some structures cannot be processed. Particularly, when a ceramic blank is processed, once the solid and hole-groove alternation or suspension characteristics occur, a gap is formed, and the size of the gap cannot be estimated, so that some characteristics which can only be completed in the blank stage cannot be processed. The extending direction of the cutting edge of the current T-shaped cutter for processing the ceramic inner cavity is generally vertical to the rotating direction, the cutting edge and a product form line contact or surface contact, and the contact surface is large; meanwhile, the force application direction of the cutting edge is consistent with the movement direction, so that the force application to the product is large, and the product is easily damaged.

For example, a "T-shaped tool" disclosed in chinese patent document, publication No. CN206662364U, includes a tool holder and a cutting portion, one end of the tool holder is connected to the cutting portion, the tool holder and the cutting portion are T-shaped, the cutting portion includes six helical peripheral teeth, six front end teeth, and six rear end teeth, and the helical peripheral teeth are connected between the front end teeth and the rear end teeth. The spiral shaft tooth cutting edge has the defects that the extension direction of the cutting edge of the spiral shaft tooth is consistent with the axial direction of the cutter, namely, the extension direction is vertical to the rotating direction, the cutter force application is too large, the contact surface is too large, and the product, particularly the ceramic product with the characteristic of alternate holes or suspended holes, is damaged.

Disclosure of Invention

The utility model aims to overcome the problem that the ceramic products are damaged by gaps, cracks and the like during processing in the prior art, and provides the inclined surface T-shaped tool suitable for processing the inner cavity of the impeller ceramic powder, which is not easy to cause the damages of the gaps, the cracks and the like during processing the ceramic products.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the T-shaped cutter comprises a T-shaped cutter seat and a blade, wherein the blade is fixed on the T-shaped cutter seat, the cutting edge of the blade forms a cylindrical surface taking a rotating shaft as a symmetry axis during rotating processing, and an acute angle or an obtuse angle is arranged between the length direction and the rotating direction of the cutting edge of the blade.

The utility model is characterized in that the extension direction of the blade edge is changed, so that an included angle which is not equal to 90 degrees is formed between the length direction of the blade edge and the running direction of the blade, when the blade which is obliquely arranged is used for rotating and processing, points on the blade edge sequentially form point contact with a product processing surface along with the movement of the blade, and the contact surface is greatly reduced; meanwhile, the resultant force applied by the blade is vertical to the extending direction of the cutting edge, and only one component force of the resultant force is applied to the product in the rotating direction of the blade, so that the maximum force applied to the processing surface of the product is reduced, and the problem that the ceramic inner cavity is easily damaged by gaps, cracks and the like during processing is solved; in order to ensure that the inner cavity characteristics of the ceramic product are qualified, the cutting edge of the blade forms a cylindrical surface which takes the rotating shaft as a central symmetry axis when rotating, and the blade is usually a PCD blade.

Preferably, the T-shaped tool apron further comprises a supporting base body, the supporting base body is fixed on the T-shaped tool apron, and the blade is fixed on the supporting base body.

The support base body is independently processed, the shape of the support base body is changed, the angle of the blade is changed, the T-shaped cutter seat does not need to be integrally processed, and the cost is saved; the outer side surface of the supporting base body is required to form a cylindrical surface which takes the rotating shaft as a central symmetry axis when rotating.

Preferably, the supporting base body is provided with an inclined surface forming an included angle with the rotation direction of the blade, and the blade is fixed on the inclined surface.

A plane for fixing the blade can be machined on the supporting base body, and then the supporting base body is fixed with the T-shaped cutter seat after being inclined for a certain angle according to the inclination angle of the required inclined plane, so that the inclination angle of the blade and the supporting base body when being fixed is ensured.

Preferably, the T-shaped tool rest comprises a tool handle and a tool bit, one end of the tool bit is fixed at the end part of the tool handle, and the other end of the tool bit extends in the direction away from the tool handle and is fixed with a supporting base body.

The handle of a knife is connected with machining center as the rotation axis of cutter, and the one end broad that tool bit and handle of a knife are connected guarantees tool bit intensity, and the other end is narrower, avoids influencing blade processing.

Preferably, the number of the tool bits is at least two, and the tool bits are centrosymmetric by taking the tool holder as a rotating shaft.

A plurality of tool bits are processed jointly, guarantee dynamic balance, promote machining efficiency.

Preferably, the support base is welded and fixed with the T-shaped cutter seat.

Preferably, the supporting base body is welded and fixed with the blade.

When the T-shaped cutter is manufactured, the cutter handle is welded with the cutter head, the processed supporting base body is welded on the cutter head, and finally the blade is further processed after being welded with the supporting base body, so that the shape of the cutting edge is ensured to meet the requirement.

Therefore, the utility model has the following beneficial effects: (1) the inclined arrangement of the blades reduces the processing contact surface and the stress of the product, and solves the problem that gaps and cracks are generated in the characteristics of the processed ceramic entity and the hole grooves alternately; (2) the shape of the blade ensures that the product characteristics are qualified; (3) the machining efficiency is high, and the precision is high.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention.

Fig. 2 is a right side view of fig. 1.

Detailed Description

The utility model is further described with reference to the following detailed description and accompanying drawings.

In the embodiment shown in fig. 1 and 2, the T-shaped tool suitable for machining the inner cavity of the impeller-like ceramic powder comprises a tool shank 1, a tool bit 2, a blade 3 and a supporting base body 4. Handle of a knife 1 is the cylinder, tool bit 2 welding is in 1 bottom of handle of a knife, tool bit 2 is equipped with two altogether, two tool bit integration sets up, form one and use handle of a knife 1 as the centrosymmetric S type structure of rotation axis, the welding of the one end that every tool bit 2 kept away from handle of a knife 1 has support base member 4, support base member 4 surface is the curved surface, this curved surface forms the face of cylinder that uses the rotation axis as the central symmetry axis when rotatory along the rotation axis, the one side that is close to the direction of rotation on the support base member 4 is equipped with the inclined plane, this inclined plane normal direction forms the acute angle with 3 directions of rotation of blade, the inclined plane bottom is towards the direction of rotation slope. The blade 3 is a PCD blade and is welded on the inclined plane. The cutting edge of the blade 3 is arranged on the outer side of the supporting base body 4, and the cutting edge forms a cylindrical surface which takes the rotating shaft as a central symmetry axis when rotating. When the obliquely arranged blade is rotationally machined, points on the cutting edge sequentially form point contact with a machined surface of a product along with the movement of the blade, so that the contact surface is greatly reduced; meanwhile, the resultant force applied by the blade is perpendicular to the extending direction of the cutting edge, and only one component force of the resultant force is applied to the product in the rotating direction of the blade, so that the maximum force applied to the processing surface of the product is reduced, and the problem that the ceramic inner cavity is easily damaged by gaps, cracks and the like during processing is solved.

In this embodiment, when machining a tool, the tool holder 1 is welded to the tool bit 2, the shape of the tool bit 2 is corrected, and it is ensured that the tool holder 1 is located at the center of the tool bit 2 after rotating. As shown in fig. 2, the supporting base bodies 4 are welded on the tool bit 2 according to a certain angle, and then are machined by the machining center, so that the supporting base bodies 4 on two sides are consistent in angle, size and shape. According to the outline shape of the PCD blade simulated by the three-dimensional model, the outline of the PCD blade 3 is processed by using a wire cutting machine, then the PCD blade 3 is welded on the supporting substrate 4, the PCD blade 3 is ensured to extend out by about 2-3 mm after welding, and then the PCD blade is processed to the final shape by a grinder and is subjected to cutter clearance. After the machining is finished, the shape of the simulation rotating body is rotated, and the PCD blade is repaired until the requirement of forming the cylindrical surface is met. And detecting the runout degree and the dynamic balance of the cutter, and finally adjusting the cutter according to the detection result until the runout is less than 0.02mm and the unbalance is less than 0.1 g.

During operation, the product is processed according to the following steps:

1. preparing materials: fixing the semi-finished blank of the impeller with the machined side window characteristics on a machine tool platform;

2. tool installation: mounting the tool shank 1 on a main shaft of a processing machine tool, rotating a tool, testing the runout degree of the tool by using a micrometer and adjusting the runout degree to be within 0.02 mm;

3. a measuring center, measuring the product center by using a decimeter;

4. tool setting: moving the cutter to the inner diameter of a product by using a hand wheel, manually rotating the cutter, moving the cutter to the position closest to the inner diameter, rotating the cutter while moving the cutter until the cutter touches the inner diameter of the product, and returning the cutter to 1mm, wherein the cutter is a zero point of processing;

5. processing: setting machining parameters according to the written program, starting a machine tool, and taking down a cutter and a product after the program is finished;

6. repairing a cutter: if the product is found to have notches and cracks, the abrasion condition of the cutter is checked and repaired in time, and the scrapping is prevented.

Claims

1. The inclined plane T-shaped tool suitable for machining the inner cavity of the impeller type ceramic powder comprises a T-shaped tool holder and blades (3) and is characterized in that the blades (3) are fixed on the T-shaped tool holder, the cutting edges of the blades (3) form a cylindrical surface with a rotating shaft as a symmetry axis during rotating machining, and acute angles or obtuse angles are arranged between the length direction and the rotating direction of the cutting edges of the blades (3).

2. The T-shaped tool for machining the inclined surface of the inner cavity of the ceramic powder body in the impeller type according to claim 1, wherein the T-shaped tool further comprises a supporting base body (4), the supporting base body (4) is fixed on the T-shaped tool holder, and the blade (3) is fixed on the supporting base body (4).

3. The T-shaped tool for machining the inclined surface of the inner cavity of the ceramic powder body in the impeller type as claimed in claim 2, wherein the supporting base body (4) is provided with an inclined surface forming an included angle with the rotating direction of the blade (3), and the blade (3) is fixed on the inclined surface.

4. The T-shaped cutter suitable for machining the inclined surface of the inner cavity of the ceramic powder body such as the impeller in the claim 2 is characterized in that the T-shaped cutter seat comprises a cutter handle (1) and a cutter head (2), one end of the cutter head (2) is fixed to the end portion of the cutter handle (1), and the other end of the cutter head (2) extends in the direction away from the cutter handle (1) and is fixedly provided with a supporting base body (4).

5. The T-shaped cutter suitable for machining the inclined surface of the inner cavity of the ceramic powder body such as the impeller is characterized in that at least two cutter heads (2) are arranged, and the cutter heads (2) are centrosymmetric by taking the cutter handle (1) as a rotating shaft.

6. The T-shaped bevel tool for machining the inner cavity of ceramic powder body like impeller as claimed in claim 2, wherein the support base body (4) is welded and fixed with the T-shaped tool holder.

7. The bevel T-shaped tool for machining cavities in ceramic powder, such as impellers, as claimed in claim 2, wherein the support base (4) is welded to the blade (3).