CN-121973318-A - Ceramic cutter string casting die with chip breaker and forming method

CN121973318ACN 121973318 ACN121973318 ACN 121973318ACN-121973318-A

Abstract

The invention provides a ceramic cutter string casting die with chip breaking grooves and a forming method, and belongs to the technical field of ceramic cutter preparation. The die comprises a plurality of cutter pouring modules connected in series through a string pouring pipeline, wherein the string pouring pipeline comprises a pouring pipeline and an exhaust pipeline, the cutter pouring modules comprise pouring cavities fixedly connected with the string pouring pipeline, cutter forming groove bodies are arranged in the pouring cavities, the pouring cavities are laterally opened cavities, the laterally opened cavities are used for mounting the cutter forming groove bodies, cavity through holes communicated with the string pouring pipeline are respectively arranged on the upper surface and the lower surface of the cutter forming groove bodies, groove body through holes communicated with the string pouring pipeline are arranged on the bottom of the cutter forming groove bodies, and chip breaking groove forming surfaces are arranged on the bottom of the inner surface of the groove bodies. Through the design cutter shaping cell body, can accurate regulation and control cutter chip breaker groove's geometric characteristics. Tens of cutter blanks with chip breaking grooves can be formed at one time, the groove type size and the contour precision are high consistent, and the microcrack defect caused by grinding is avoided.

Inventors

CHEN HUI
ZHU ZHENGJIA
XU CHONGHAI
ZHANG JINGJIE
XIAO GUANGCHUN
CHEN ZHAOQIANG
YI MINGDONG
MENG XIANGLONG

Assignees

齐鲁工业大学(山东省科学院)

Dates

Publication Date: 20260505
Application Date: 20260206

Claims (10)

1. The ceramic cutter string casting mold with the chip breaker is characterized by comprising a plurality of cutter casting modules connected in series through string casting pipelines, wherein the string casting pipelines comprise casting pipelines and exhaust pipelines, the cutter casting modules comprise casting cavities fixedly connected with the string casting pipelines, and cutter forming groove bodies are arranged in the casting cavities; the casting cavity is a cavity with a lateral opening, the lateral opening is used for installing a cutter forming groove body, cavity through holes communicated with the serial casting pipeline are respectively arranged on the upper surface and the lower surface of the cutter forming groove body, the cutter forming groove body is a groove body with an upper opening, the bottom of the cutter forming groove body is provided with a groove body through hole communicated with the serial casting pipeline, and the bottom of the inner surface of the groove body is provided with a chip breaker forming surface.
2. The ceramic tool string casting mold with the chip breaker groove according to claim 1, wherein the plurality of tool casting modules connected in series form a module group, string casting pipelines of the plurality of module groups are connected in parallel to a string casting main pipeline at the upper end, the string casting main pipeline comprises a casting main pipeline and an exhaust main pipeline, the casting main pipeline is communicated with the plurality of string casting pipelines, and the exhaust main pipeline is communicated with the plurality of exhaust pipelines.
3. The ceramic tool string casting mold with the chip breaker groove according to claim 1, wherein the top ends of a plurality of the module groups are respectively communicated with an overflow cavity, the overflow cavity is provided with an exhaust port, and the overflow cavity is communicated with a main casting pipe.
4. The ceramic tool string casting mold with chip breaker grooves according to claim 3, wherein a casting port is arranged at the top end of the casting main pipe, and an exhaust port is arranged at the top end of the exhaust main pipe.
5. The ceramic tool string casting mold with chip breaker grooves according to claim 1, wherein the cavity through hole and the groove through hole are respectively aligned with the string casting pipeline, and the cavity through hole and the groove through hole respectively comprise a grouting through hole and an exhaust through hole, so that the string casting pipeline, the cavity through hole and the groove through hole form a channel which penetrates up and down.
6. The ceramic cutter string casting die with the chip breaker groove according to claim 1, wherein the groove body through hole is arranged in the center of the bottom of the groove body, and the chip breaker groove forming surface is arranged at the periphery of the groove body through hole; or, the side wall of the inner surface of the groove body comprises a cutter fillet molding surface.
7. A ceramic tool string casting forming method with chip breaking grooves based on the ceramic tool string casting mold with chip breaking grooves as set forth in any one of claims 1 to 6, characterized by comprising the steps of: S1, mounting a cutter forming groove body into a pouring cavity; S2, injecting ceramic slurry into the pouring cavity along the pouring pipeline, and exhausting gas through the exhaust pipeline; s3, taking out the cutter molding groove body from the pouring cavity, and taking out the solidified ceramic cutter blank from the cutter molding groove body; And S4, drying and sintering the blank to obtain the ceramic cutter with the chip breaking grooves.
8. The chip breaker ceramic tool string casting method as recited in claim 7 wherein in S1, the slot through holes and the cavity through holes are aligned with the string casting pipe, respectively.
9. The method for forming ceramic cutting tool strings with chip breaker grooves according to claim 7, wherein in S2, the viscosity of the ceramic slurry is 0.1 to 1pa·s, and the pH is 7 to 12; Or in S2, the preparation raw materials of the ceramic slurry comprise ceramic powder, a monomer, a cross-linking agent, a pH regulator, a dispersing agent, an initiator, a catalyst and water, wherein the mass ratio of the ceramic powder to the monomer to the dispersing agent is 100 (2-6) (0.6-0.9), and the mass ratio of the monomer to the cross-linking agent is (5-15) (1); Or in the step S2, the curing method comprises standing for 2-4 hours at room temperature.
10. The ceramic cutter string casting forming method with the chip breaker groove according to claim 7, wherein in the step S4, the drying method comprises the steps of drying for 12-24 hours at room temperature, then drying for 6-12 hours at 35-45 ℃, and then drying for 6-12 hours at 45-50 ℃, wherein the weight of a blank is kept constant; Or in the step S4, the sintering method comprises pressureless sintering under the air atmosphere, wherein the temperature rising and reducing rates are 2-4 ℃ per minute, the temperature is kept at 400-600 ℃ for 1-3 hours during the temperature rising, and the temperature is kept at 1500-1900 ℃ for 2-8 hours.

Description

Ceramic cutter string casting die with chip breaker and forming method Technical Field The invention belongs to the technical field of ceramic cutter preparation, and particularly relates to a ceramic cutter string casting die with chip breaking grooves and a forming method. Background The disclosure of this background section is only intended to increase the understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art already known to those of ordinary skill in the art. In the fields of high-speed cutting, dry cutting and difficult-to-machine materials, ceramic cutters are indispensable key tools for advanced manufacturing technologies due to their excellent high-temperature hardness and excellent wear resistance. Because of the mechanical property of the ceramic tool and the design reason of the cutting edge, the chip breaking groove is not easy to occur during metal cutting, long strip chips are easy to wind on a workpiece or the tool, the surface quality of a machining surface is reduced, the tool abrasion is aggravated, the chip edge is sharp and not easy to clean, and the machining flow is also disturbed. Chip breaker structures are therefore often added to ceramic tools to promote chip breakage. The existing method for machining the chip breaker comprises a method for preparing a ceramic cutter without the chip breaker, a method for preparing the chip breaker through machining, a 3D printing method and the like, but equipment cost is high, production efficiency is low, microcracks are easy to introduce when the ceramic cutter with high hardness is machined, and the density is affected by residual air holes or deformation defects when the ceramic cutter with high hardness is subjected to 3D printing, so that the production efficiency is low, and the ceramic cutter is difficult to be used for large-scale production. Disclosure of Invention Aiming at the technical problems at present, the invention aims to provide a ceramic cutter string casting die with chip breaking grooves and a forming method. Ceramic cutters with chip breakers can be produced in batches through a gel casting molding technology, the production efficiency is remarkably improved, the cost is reduced, meanwhile, the consistency of the precision and the mechanical property of the chip breakers of the cutters is ensured, the requirements of industrialized large-scale processing are rapidly matched, and the double guarantee of productivity and quality is realized. In order to achieve the above purpose, the technical scheme of the invention is as follows: In a first aspect, a ceramic cutter string casting mold with chip breaking grooves comprises a plurality of cutter casting modules connected in series through string casting pipelines, wherein the string casting pipelines comprise casting pipelines and exhaust pipelines, the cutter casting modules comprise casting cavities fixedly connected with the string casting pipelines, and cutter forming groove bodies are arranged in the casting cavities; the casting cavity is a cavity with a lateral opening, the lateral opening is used for installing a cutter forming groove body, cavity through holes communicated with the serial casting pipeline are respectively arranged on the upper surface and the lower surface of the cutter forming groove body, the cutter forming groove body is a groove body with an upper opening, the bottom of the cutter forming groove body is provided with a groove body through hole communicated with the serial casting pipeline, and the bottom of the inner surface of the groove body is provided with a chip breaker forming surface. In a second aspect, a ceramic cutter string casting molding method with chip breaking grooves based on the ceramic cutter string casting mold with chip breaking grooves comprises the following steps: S1, mounting a cutter forming groove body into a pouring cavity; S2, injecting ceramic slurry into the pouring cavity along the pouring pipeline, and exhausting gas through the exhaust pipeline; s3, taking out the cutter molding groove body from the pouring cavity, and taking out the solidified ceramic cutter blank from the cutter molding groove body; And S4, drying and sintering the blank to obtain the ceramic cutter with the chip breaking grooves. The beneficial effects of the invention are as follows: 1. The ceramic cutter with the chip breaker structure is designed by combining gel casting, the gel casting fills the die through low-viscosity slurry, and the geometric characteristics of the chip breaker of the cutter can be accurately regulated and controlled by designing the cutter forming groove body, particularly the shape, the size parameters and the surface textures of the chip breaker forming surface, so that the chip breaker ceramic cutters with different structural forms are prepared, the requirements of diversified cutting wo