CN115519680A

CN115519680A - Resin diamond slice for cutting metal ceramic round bar

Info

Publication number: CN115519680A
Application number: CN202211208613.5A
Authority: CN
Inventors: 王健
Original assignee: Jiangsu Saiyang Precision Tools Technology Co ltd
Current assignee: Jiangsu Saiyang Precision Tools Technology Co ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2022-12-27

Abstract

The invention discloses a resin diamond slice for cutting a metal ceramic round bar, which can be used for cutting the metal ceramic round bar, adopts the pore-forming and granulation technologies, introduces alloy materials, nano materials and glass fiber materials into a resin bonding agent slice, improves the strength of the slice and the bonding strength with a steel matrix, and reduces the ring dropping of the slice. Compared with the existing diamond slice, the production efficiency is improved, the self-sharpening performance of the slice is improved, the fracture of the slice caused by grinding and extrusion is eliminated, and meanwhile, the cut rate of the section of the metal ceramic bar is greatly reduced.

Description

Resin diamond slice for cutting metal ceramic round bar

Technical Field

The invention belongs to the field of superhard abrasive material slicing, and particularly relates to a resin diamond slice for cutting a metal ceramic round bar, which can efficiently cut the metal ceramic round bar for a long time.

Background

Cermet, as a novel cutting tool material which develops faster in recent years, has not only good chemical stability, but also excellent physical properties such as strong abrasion resistance, good red hardness, small friction coefficient and the like, and has been developed by a plurality of manufacturers at home. The metal ceramic cutter has excellent heat resistance, wear resistance and chemical stability, and shows incomparable advantages compared with the traditional cutter in the field of high-speed cutting and the aspect of cutting difficult-to-process materials. The metal ceramic cutter is estimated to replace part of hard alloy cutters and occupies 30 percent of market share. However, the cermet material is difficult to machine, and the machining efficiency of the cermet tool is only 30% -50% of that of the hard alloy tool, so that the manufacturing cost of the cermet tool is far higher than that of the hard alloy tool. Therefore, a new section needs to be researched to solve the problems of low processing efficiency and poor self-sharpening performance at present.

Disclosure of Invention

The invention aims to provide a resin diamond slice for cutting a metal ceramic round bar material, which can cut the metal ceramic round bar material for a long time with high efficiency. The production efficiency of the client is improved, and the interval of the rest is delayed.

In order to achieve the purpose, the specific technical scheme of the invention is as follows: a resin diamond slice for cutting a metal ceramic round bar material consists of a base body and an abrasive layer; the grinding material layer is prepared from diamond grinding materials, resin powder, resin hollow spheres, alloy powder, inorganic fiber powder and additives. Preferably, the diamond particle size is 170/200.

According to the invention, the diamond abrasive is 20-30 wt%, the resin powder is 20-30 wt%, the resin hollow sphere is 8-12 wt%, the alloy powder is 10-20 wt%, the inorganic fiber powder is 10-15 wt%, and the balance is additive; preferably, the diamond abrasive is 25-30%, the resin powder is 25-30%, the resin hollow sphere is 8-12%, the alloy powder is 10-18%, the inorganic fiber powder is 10-15%, and the balance is additive.

In the invention, the resin powder is polyimide resin powder, and the average particle size of the resin powder is 20 microns; the resin hollow sphere is a PS resin hollow sphere, and the average particle size of the PS resin hollow sphere is 20 micrometers; the inorganic fiber powder is glass fiber powder, the length of the inorganic fiber powder is 1-10 microns, and the diameter of the inorganic fiber powder is 200 nanometers; the additive is silicon carbide, and the average grain diameter of the additive is 500 nanometers.

In the invention, the alloy powder consists of copper powder, tin powder, lead powder and cadmium powder, preferably, the copper powder accounts for 30-40 percent, the tin powder accounts for 25-35 percent, the lead powder accounts for 20-25 percent and the cadmium powder accounts for the rest in percentage by mass. Preferably, copper powder, tin powder, lead powder and cadmium powder are subjected to freezing ball milling to obtain alloy powder; more preferably, the alloy powder is obtained by freeze ball milling and sieving. Aiming at the recent existing metal ceramic bar, the prior art has no special slice and no corresponding preparation raw material, the invention firstly screens a plurality of metal powders after freezing and ball milling, the obtained alloy powder is used for slice preparation to become a metal granulation substance, the metal granulation substance is combined with glass fiber powder and silicon carbide to be used as a bonding agent auxiliary material, and the processed and prepared pore-forming resin diamond slice is used for cutting the metal ceramic bar, thereby achieving obvious progress compared with the resin metal composite diamond slice in the prior production application, taking the sharpness and the service life of the slice into consideration, and the end surface of the cut metal ceramic bar is smooth and flat and has the defect of less than 0.1 mm.

According to the invention, the diamond grinding material, the resin powder, the resin hollow spheres, the alloy powder, the inorganic fiber powder and the additive are mixed to form a molding material, then the molding material and the matrix are subjected to hot press molding, and then the molding material and the matrix are hardened to obtain the resin diamond slice for cutting the metal ceramic round bar. Preferably, the diamond abrasive, the resin powder, the resin hollow spheres, the alloy powder, the inorganic fiber powder and the additive are dispersed in absolute ethyl alcohol, and then the mixture is dried and sieved to obtain the molding material.

In the present invention, the substrate is an existing product, such as a steel substrate. The hot pressing is carried out for 20 to 30 minutes at the temperature of between 230 and 240 ℃, and the pressure is between 250 and 350MPa. The top temperature of hardening is 190-220 deg.C, and the time is 8-12 hours.

Due to the application of the scheme, compared with the prior art, the invention has the following advantages:

1. the invention discloses a resin diamond slice for cutting a metal ceramic round bar, which can be used for cutting the metal ceramic round bar, improves the production efficiency compared with the conventional resin diamond slice, improves the self-sharpening property of the slice, and eliminates the slice fracture caused by grinding and extrusion of the slice.

2. According to the diamond slice, due to the fact that the diamond slice is provided with the pore-forming agent and granulated, the sharpness of the slice is greatly improved; in addition, in the cutting process, notches on the cutting surface of the metal ceramic bar are not easy to be caused, and in addition, the diamond slice has good strength.

3. The invention uses the high-strength and high-modulus glass fiber, the nano material and the alloy, so that the bending strength of the whole abrasive layer carcass is improved by more than 30 percent, and the slice has better safety performance at higher feeding speed in use.

4. The preparation process of the resin slice disclosed by the invention is simple, the raw materials have no special requirements, and the preparation method is suitable for industrial production.

Drawings

FIG. 1 is a schematic view of a resin diamond slice for cutting a cermet round bar material according to an embodiment;

fig. 2 shows the cutting result of the conventional section.

FIG. 3 shows the cutting effect of the slice of the present invention.

Detailed Description

In the invention, the raw materials are cutting slices to prepare conventional products, and the granularity of the selected diamond is 170/200; the resin powder is polyimide resin powder, and the average particle size of the resin powder is 20 microns; the resin hollow sphere is a PS resin hollow sphere, and the average particle size of the PS resin hollow sphere is 20 micrometers; the inorganic fiber powder is glass fiber powder, the length of the inorganic fiber powder is 3-6 micrometers, and the diameter of the inorganic fiber powder is 200 nanometers; the additive is silicon carbide, and the average grain diameter of the additive is 500 nanometers. Copper powder with an average particle size of 200 nm; tin powder with an average particle size of 200 nm; lead powder with the average grain diameter of 500 nanometers; cadmium powder having an average particle size of 1 micron. The invention creatively combines the commercially available raw materials, adopts a certain preparation process, obtains a product specially used for cutting the metal ceramic bar for the first time, and has obvious progress compared with the existing composite diamond slice for production and application. The thickness of the steel matrix is 0.6 +/-0.02 mm; the thickness of the abrasive layer is 0.8 +/-0.02 mm; the steel substrate is made of spring steel; the hardness HRC of the steel matrix material is 60 +/-2 degrees, the flatness of the steel matrix is 0.01mm, the axial runout of the steel matrix is 0.02mm, a blank matrix is taken before use, lathing, forming, tooth punching, cleaning and hanging for standby, and the step is a conventional technology. The grinding material layer is composed of resin binder (resin powder and auxiliary components) and diamond grinding materials, and the whole grinding material layer is designed to be sharp and has good self-sharpening performance. The specific preparation operation and processing test are conventional techniques, and the parts in the examples are parts by weight.

Example one

A resin diamond slice for cutting a metal ceramic round bar material has the specification: d =150, T =0.6, U =0.8, X =10, H =31.75. Its preparation method includes: mixing materials, die filling, hot pressing, sintering and hardening, processing the hardened slice forming body to the shape and size required by a drawing, and warehousing after the superhard slice forming body is qualified according to the national standard of superhard slices. The method comprises the following specific steps:

(1) Pre-alloying: weighing 40 parts of copper powder, 30 parts of tin powder, 20 parts of lead powder and 10 parts of cadmium powder, putting the materials into a freezing ball mill, mechanically milling the materials for 12 hours (1000 rpm) at 0 ℃, then passing through a 200# screen, and taking undersize as alloy powder.

(2) Mixing materials: weighing 25 parts of diamond (170/200), 30 parts of polyimide resin powder, 8 parts of PS resin hollow spheres, 10 parts of alloy powder, 15 parts of glass fiber powder and 12 parts of silicon carbide, adding the materials into absolute ethyl alcohol, performing conventional ultrasonic dispersion for 5 hours, drying, sieving by a 120# sieve screen, and taking undersize as a molding material.

(3) Charging and hot pressing: and (3) putting the processed steel substrate into a conventional die, adding the molding material obtained in the step (2) into the die, strickling, and placing the die on a hot press with the pressure of 300MPa for hot press molding, wherein the temperature of the hot press is set to be 235 ℃, and the hot press time is 25 minutes, so that a slice blank is obtained.

(4) Hardening: placing the pressed sliced blank in an oven for subsequent hardening; and (3) hardening process: heating from room temperature to 100 deg.C for 0.5h, and maintaining for 1h; then heating to 170 ℃ for 2h, and preserving heat for 1h; then heating to 200 ℃ for 2h, and preserving heat for 10h; naturally cooling to room temperature and taking out to obtain a sliced compact.

(5) And (3) processing the slice forming body to a specified size and shape on a lathe and a grinding machine according to the requirements of a drawing, packaging and warehousing after the slice forming body is inspected to be qualified according to the national standard JB/T7425-94 of the superhard slice, so as to obtain the resin diamond slice for cutting the metal ceramic round bar, wherein the structure of the obtained resin diamond slice for cutting the metal ceramic round bar is shown in the attached figure 1 and comprises a substrate and an abrasive layer.

Example two

A resin diamond slice for cutting a metal ceramic round bar material has the same specification as the first embodiment.

The preparation method comprises the following steps:

(1) Pre-alloying: the same as the first embodiment.

(2) Mixing materials: weighing 25 parts of diamond (170/200), 25 parts of polyimide resin powder, 12 parts of PS resin hollow spheres, 18 parts of alloy powder, 12 parts of glass fiber powder and 8 parts of silicon carbide, adding the materials into absolute ethyl alcohol, performing conventional ultrasonic dispersion for 5 hours, drying, sieving by a 120# sieve screen, and taking undersize as a molding material.

(3) Charging, hot pressing and hardening: the same as the first embodiment.

And (3) processing the slice forming body to a specified size and shape on a lathe and a grinding machine according to the requirements of a drawing, packaging and warehousing after the slice forming body is inspected to be qualified according to the national standard JB/T7425-94 of the superhard slice, and obtaining the resin diamond slice for cutting the metal ceramic round bar.

EXAMPLE III

A resin diamond slice for cutting a metal ceramic round bar material has the specification: d =200, T =0.6, U =0.8, X =10, H =25.4. Its fabrication method is similar to embodiment 1:

(1) Pre-alloying: weighing 35 parts of copper powder, 30 parts of tin powder, 25 parts of lead powder and 10 parts of cadmium powder, putting the materials into a freezing ball mill, mechanically milling the materials for 12 hours (1000 rpm) at 0 ℃, then passing the materials through a 200# screen, and taking undersize as alloy powder.

(2) Mixing materials: 25 parts of diamond (170/200), 30 parts of polyimide resin powder, 8 parts of PS resin hollow spheres, 10 parts of alloy powder, 15 parts of glass fiber powder and 12 parts of silicon carbide are weighed, all added into absolute ethyl alcohol, subjected to conventional ultrasonic dispersion for 5 hours, dried, sieved by a No. 120 screen mesh, and taken as a molding material.

(3) Charging, hot pressing and hardening: the same as the first embodiment.

The slices and the existing slices are used for cutting the metal ceramic round bar, and table 1 shows the performance parameters of the slices of the invention and the performance parameters of the metal ceramic round bar cut by the existing slices, wherein the existing slices are the best slices produced and applied by the current customers.

Compared with the existing diamond cutting blade, the cutting speed of the cutting blade is greatly improved, the cutting time is greatly shortened, the adjusting interval of the cutting blade is greatly improved, and the notch rate of the cut bar is greatly reduced. The better the sharpness and self-sharpness of the cut piece, the lower the chipping rate.

Compared with the existing slicing method, the small-size slicing method has the advantages that the small-size slicing method is adopted, the slicing sharpness is better, the restitution interval is long, and particularly the cutting quality is good. Under the same size, the cutting blade of the invention has better processing performance than the prior cutting blade, and the sharpness of the cutting blade is not reduced under the condition of improving the linear speed; the abrasive layer has better holding force with the matrix, and the cutting fracture ratio is much smaller.

The product of the invention is the first process of processing the metal ceramic cutter bar, the existing slice for processing the hard alloy bar has the defects of low efficiency and poor self-sharpening property when the metal ceramic cutter is processed, and the processing of the metal ceramic bar is greatly hindered, and the slice is broken after being cut by the existing slice, see figure 2. Because no metal alloy powder with proper melting point and proper granularity is sold in the market, the invention purchases conventional raw materials, selects proper proportion, carries out pre-alloying and granulation to obtain metal granulation substances, and particularly adopts a freezing ball mill to carry out uniform ball milling granulation at low temperature; compared with the direct mixing of metal powder, the method has obvious technical progress. According to the invention, a plurality of metal powders are frozen, ball-milled and sieved for the first time, the obtained alloy powders are used for preparing slices to form metal granulated substances, the metal granulated substances are combined with glass fiber powder and silicon carbide to be used as auxiliary materials of a binding agent, and the processed and prepared pore-forming resin diamond slices are used for cutting metal ceramic bars and have obvious progress compared with the resin metal composite diamond slices produced and applied in the prior art, and referring to fig. 3, the bars are free from breakage and are qualified after being cut by three slices in the embodiment.

Comparative example 1

A resin diamond slice for cutting a metal ceramic round bar material has the specification: d =200, T =0.6, U =0.8, X =10, H =25.4, the manufacturing method is as follows:

(1) Premixing metals: weighing 30 parts of copper powder, 30 parts of tin powder, 25 parts of lead powder and 15 parts of cadmium powder, putting the materials into a powder mixer (only mixing and ball milling are carried out), mixing for 12 hours, then sieving the materials through a 200# sieve, and taking undersize materials as alloy powder.

(2) Mixing materials: 25 parts of diamond (170/200), 30 parts of polyimide resin powder, 8 parts of PS resin hollow spheres, 10 parts of premixed metal powder, 15 parts of glass fiber powder and 12 parts of silicon carbide are weighed, all added into absolute ethyl alcohol, subjected to conventional ultrasonic dispersion for 5 hours, dried, sieved by a No. 120 screen mesh, and taken as a molding material.

(3) Charging, hot pressing, hardening and post-processing: the same as the third embodiment.

On the basis of the third embodiment, the prealloyed raw materials are not prealloyed, but are directly mixed with resin powder diamond and the like after conventional physical mixing, so that the service life of the obtained slice is short, and under the same processing conditions, the service life of the slice is 5 days.

Comparative example No. two

On the basis of the third embodiment, the silicon carbide powder is replaced by the white corundum powder, so that the time for cutting the obtained slice into the metal ceramic bar is prolonged, the cutting efficiency is reduced, the cutting sound is increased, and the method is not suitable for production.

On the basis of the third embodiment, the dosages of the lead powder and the cadmium powder are changed, and the trimming interval of the obtained slices is reduced to 39 pieces/time.

The invention adopts the existing raw materials, prepares a new slice by combining the selection of a formula and the prealloy on the basis of keeping the existing slice production process and the process of cutting the metal ceramic round bar as far as possible, unexpectedly obtains an effect beyond the design in the processing process of the metal ceramic round bar, particularly remarkably improves the trimming interval, obtains a satisfactory result in small trials of customers, and is gradually pushed to the production.

Claims

1. The resin diamond slice for cutting the metal ceramic round bar is composed of a base body and an abrasive layer, and is characterized in that the abrasive layer is prepared from diamond abrasive, resin powder, resin hollow spheres, alloy powder, inorganic fiber powder and additives.

2. The resin diamond slice for cutting the metal ceramic round bar according to claim 1, wherein the diamond abrasive material is 20 to 30 percent, the resin powder is 20 to 30 percent, the resin hollow sphere is 8 to 12 percent, the alloy powder is 10 to 20 percent, the inorganic fiber powder is 10 to 15 percent, and the balance is additive.

3. The resin diamond slice for cutting the cermet round bar as recited in claim 1, wherein the resin powder is polyimide resin powder; the resin hollow sphere is a PS resin hollow sphere; the inorganic fiber powder is glass fiber powder; the additive is silicon carbide; the alloy powder consists of copper powder, tin powder, lead powder and cadmium powder.

4. The resin diamond slice for cutting the cermet round bar as recited in claim 3, wherein the weight percentage of copper powder is 30-40%, tin powder is 25-35%, lead powder is 20-25%, and the balance is cadmium powder.

5. The resin diamond slice for cutting the cermet round bar as recited in claim 3, wherein the copper powder, tin powder, lead powder and cadmium powder are frozen and ball milled to obtain the alloy powder.

6. The method for preparing a resin diamond slice for cutting a cermet round bar as recited in claim 1, wherein the resin diamond slice for cutting a cermet round bar is obtained by mixing a diamond abrasive, resin powder, a resin hollow sphere, alloy powder, inorganic fiber powder and an additive to form a molding material, hot-pressing the molding material and a steel substrate, and hardening.

7. The method for preparing a resin diamond slice for cutting a cermet round bar as claimed in claim 6, wherein the diamond abrasive, the resin powder, the resin hollow sphere, the alloy powder, the inorganic fiber powder and the additive are dispersed and mixed in the absolute ethyl alcohol, and then dried to obtain the molding material.

8. Use of the resin diamond blade for cutting a cermet round bar as set forth in claim 1 for preparing a cut material.

9. A method of cutting a round bar of cermet material by using the resin diamond chip of claim 1.

10. Use of the resin diamond segments for cutting round cermet rod material as set forth in claim 1 for cutting round cermet rod material.