CN106626011B

CN106626011B - Micro-texture graphite male die processing device

Info

Publication number: CN106626011B
Application number: CN201710019721.0A
Authority: CN
Inventors: 冯益华; 张记云; 王丽; 张文泉; 田园; 孔雪
Original assignee: Qilu University of Technology
Current assignee: Qilu University of Technology
Priority date: 2017-01-12
Filing date: 2017-01-12
Publication date: 2023-05-26
Anticipated expiration: 2037-01-12
Also published as: CN106626011A

Abstract

The invention discloses a processing device for a graphite male die for preparing a micro-texture ceramic tool. The device presses the prepared graphite solid-liquid mixture from one side of a through hole in the center of a graphite matrix through an extrusion molding process until the graphite solid-liquid mixture is extruded from the other side of the through hole of the graphite matrix to a required height, and then the graphite matrix is dried to obtain the required micro-texture graphite male die. The micro-texture graphite male die processed by the method solves the defects of poor integrity and easy micro-texture cracking of the traditional mechanical processing graphite micro-texture male die. Meanwhile, the micro-texture male die formed by the graphite which is prepared independently is rich in variety, free in material selection and independent of a graphite market, and the functions of reducing the abrasion and cooling and prolonging the service life of a cutter in cutting the graphite and the micro-texture can be well coupled together to promote the development of a machining technology.

Description

Micro-texture graphite male die processing device

Technical Field

The invention belongs to the technical field of ceramic cutters for cutting in machining, and relates to a preparation device of a graphite male die for a micro-texture ceramic cutter.

Background

In-situ forming of the micro-texture ceramic cutter refers to the process of hot-pressing sintering of the ceramic cutter, wherein a micro-texture graphite male die prepared in advance is used as an upper pressure head and a lower pressure head for hot-pressing sintering, and the micro-texture ceramic cutter is prepared at one time. The in-situ forming micro-texture ceramic cutter has the functions of reducing friction, reducing temperature and reducing the binding effect of cutter scraps, and greatly prolongs the service life of the cutter. Compared with the traditional method for processing the micro-texture on the front cutter surface of the cutter, the one-time formed micro-texture cutter has better surface integrity, and the damage to the cutter caused by secondary processing is avoided. However, the preparation of the existing graphite male die is limited to mechanical processing, and the processed graphite male die has low yield due to the limitation of the physical properties of graphite, and the advantages of graphite and micro-texture are difficult to be well exerted due to single component.

Chinese patent application number: CN 201210003617. X "reports a process for preparing a self-lubricating ceramic tool of microcell graphite. The micro-pool graphite pressure head used in the process is characterized in that a pit with a certain size is processed on the surface of the graphite pressure head by a mechanical processing method, and then a micro-pool ceramic cutter with a self-lubricating function is prepared by hot-pressing sintering. Because of the physical properties of graphite, the integrity of the graphite is difficult to ensure by mechanical processing, the processability of the graphite with different particle sizes is inconsistent, the micron-level texture cannot be machined when the particle size is too large, and the material selection of the graphite depends on the fact that the type of the graphite in the market is too single.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a processing device of a micro-texture graphite male die. The device adopts extrusion molding technology to process the micro-texture graphite male die, and the micro-texture graphite male die processed by the device has higher precision, ensures the integrity of a convex structure, and can prepare the required graphite at will to fully utilize the advantages of the graphite and the micro-texture.

In order to solve the problems, the invention adopts the following technical scheme: a micro-texture graphite male die processing device is characterized in that:

(1) The graphite solid-liquid mixture is injected into a storage container of the device.

(2) And applying pressure to the plunger above the storage container to enable the graphite solid-liquid mixture to pass through the through holes of the graphite matrix until the lower surface of the graphite matrix protrudes to a required height.

(3) And taking out the graphite matrix, and drying the graphite matrix to obtain the graphite male die for preparing the micro-texture ceramic cutter.

(4) And (3) preparing the micro-texture ceramic cutter by using the prepared graphite male die, and obtaining the in-situ formed micro-texture graphite self-lubricating ceramic cutter.

The micro-texture graphite male die processed by the invention is a common cylindrical bulge, and in the practical application process, if bulges with other shapes are needed, the micro-texture graphite male die can be processed by the invention, and only through holes with the needed shapes and intervals are needed to be processed on a graphite substrate.

The beneficial effects of the invention are as follows: the microprotrusion male die is processed by extrusion, has the advantages of high precision, convenient control and the like, and avoids the defect that the graphite material with poor surface integrity is too single in the traditional machining mode. By changing the size of the through hole and the components of the graphite solid-liquid mixture, the double advantages of graphite serving as a solid lubricant and micro-texture friction-reducing, temperature-reducing and cutter chip bonding can be better exerted.

Drawings

Fig. 1 is a schematic view of the structural assembly of the present invention.

FIG. 2 is a schematic drawing of a microtextured graphite punch after completion of the process of the present invention.

In the accompanying drawings: 1-a plunger; 2-a storage container; 3-graphite solid-liquid mixture; 4-pressing head; 5-a rubber gasket; 6-a bolt and nut; 7-micro through holes; 8-pressing down the head; 9-graphite matrix; 10-microprotrusions.

Detailed Description

The invention is further described below with reference to the drawings and examples.

Examples:

a preparation device of a graphite male die for an in-situ forming micro-texture ceramic tool comprises the following steps of.

(1) The graphite substrate 9, which has been previously processed with the through-holes, is placed in the device lower press head 8.

(2) The rubber gasket 5 is installed, and the height of the rubber gasket 5 is about 1mm higher than the graphite base 9. A lower pressure head 8 is arranged and connected with the upper pressure head 4 through a bolt and a nut 6.

(3) The storage vessel 2 is filled with a graphite solid-liquid mixture 3, the graphite solid-liquid mixture 3 occupies about 2/3 of the storage vessel 2, the plunger 1 is placed over the graphite solid-liquid mixture 3, and the plunger 1 is brought into complete contact with the graphite solid-liquid mixture 3.

(4) After the device is installed, pressure is applied to the plunger 1, and the graphite solid-liquid mixture 3 is pressed in from the upper side of the through hole of the graphite substrate 9 until the graphite solid-liquid mixture 3 is extruded out from the lower side of the through hole of the graphite substrate 9 to a required height.

(5) The graphite matrix 9 is taken out and dried to obtain the required graphite male die as shown in figure 2.

Claims

1. A micro-texture graphite male die processing device is characterized in that a graphite male die with micro-texture protrusions on the surface can be prepared by an extrusion molding process, and the specific preparation process is as follows:

(1) placing a graphite substrate (9) with a through hole machined in advance in a lower press head (8) of the device;

(2) the rubber gasket (5) is arranged, the height of the rubber gasket (5) is 1mm higher than that of the graphite substrate (9), and the rubber gasket is placed into the lower pressure head (8) and connected with the upper pressure head (4) through the bolt and the nut (6);

(3) injecting a graphite solid-liquid mixture (3) into a storage container (2) of the device, wherein the graphite solid-liquid mixture (3) accounts for 2/3 of the storage container (2), placing a plunger (1) on the graphite solid-liquid mixture (3), and enabling the plunger (1) to be in full contact with the graphite solid-liquid mixture (3);

(4) applying pressure to a plunger (1) at the upper part in a storage container (2), and pressing the graphite solid-liquid mixture (3) from one side above a through hole of a graphite matrix (9) until the graphite solid-liquid mixture (3) is extruded from one side below the through hole of the graphite matrix (9) to a required height;

(5) and taking out the graphite matrix (9), and drying the graphite matrix to obtain the graphite male die for preparing the micro-texture ceramic tool.