CN112453412A - Sintered diamond circular saw blade processing technology - Google Patents

Sintered diamond circular saw blade processing technology Download PDF

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Publication number
CN112453412A
CN112453412A CN202011251564.4A CN202011251564A CN112453412A CN 112453412 A CN112453412 A CN 112453412A CN 202011251564 A CN202011251564 A CN 202011251564A CN 112453412 A CN112453412 A CN 112453412A
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saw blade
circular saw
central hole
matrix
base body
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CN202011251564.4A
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CN112453412B (en
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张健旺
任海霞
董小雷
彭乃聪
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Hebei Xmf Tools Group Co ltd
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Hebei Xmf Tools Group Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
    • B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/14—Both compacting and sintering simultaneously
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D65/00—Making tools for sawing machines or sawing devices for use in cutting any kind of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • B22F2003/247—Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps

Abstract

The application relates to a sintered diamond circular saw blade processing technology, which comprises the following steps: s1: punching an initial central hole, sawteeth and a process hole on a steel strip by a punch press, wherein the diameter of the initial central hole is smaller than the designed diameter of the central hole of the product, and edging to obtain a matrix; s2: pressurizing and molding the matrix and the diamond powder to obtain a primary molded circular saw blade; s3: and (3) carrying out pressure sintering on the circular saw blade which is initially formed, and then stamping and reaming the initial central hole position of the circular saw blade which is initially formed while the circular saw blade is hot to obtain a central hole with a designed diameter. This application has the effect of high centre bore precision.

Description

Sintered diamond circular saw blade processing technology
Technical Field
The application relates to the field of diamond circular saw blades, in particular to a processing technology of a sintered diamond circular saw blade.
Background
The sintered diamond circular saw blade is an important component of a diamond tool and is mainly applied to cutting and processing stone and building material products.
The center hole is arranged in the middle of the diamond circular saw blade and used for installing the diamond circular saw blade on equipment for driving the diamond circular saw blade to rotate. In the process of processing the sintered diamond circular saw blade, diamond powder and a machine body need to be sintered in a sintering furnace, an inner hole is reduced to a certain extent in the sintering process of a matrix, and the precision of the central hole of the matrix cannot be guaranteed.
Disclosure of Invention
In order to improve the precision of centre bore, this application provides a sintering diamond circular saw blade processing technology.
The application provides a sintered diamond circular saw blade processing technology adopts following technical scheme:
a sintered diamond circular saw blade processing technology comprises the following steps:
s1: punching an initial central hole, sawteeth and a process hole on a steel strip by a punch press, wherein the diameter of the initial central hole is smaller than the designed diameter of the central hole of the product, and edging to obtain a matrix;
s2: pressurizing and molding the matrix and the diamond powder to obtain a primary molded circular saw blade;
s3: and (3) carrying out pressure sintering on the circular saw blade which is initially formed, and then stamping and reaming the initial central hole position of the circular saw blade which is initially formed while the circular saw blade is hot to obtain a central hole with a designed diameter.
Through adopting above-mentioned technical scheme, dash out the first central hole in less aperture during the punching press, make in the pressure sintering, first central hole position still can produce certain deformation, thereby reduce the deformation of other positions of base member, be favorable to improving the base member quality, simultaneously, first central hole diameter is less than the design diameter of centre bore, make the first central hole after the deformation have great machining allowance, be favorable to improving the reaming precision of punching press, punching press reaming itself has higher precision simultaneously, thereby the precision of centre bore has been improved, the product shaping quality has been improved, make the installation accuracy when the circular saw blade uses higher.
Optionally, the diameter of the initial central hole is 2-3mm smaller than the designed diameter of the central hole of the product, the thickness of the substrate is 0.8-2.2mm, and the diameter is 50-350 mm.
By adopting the technical scheme, the central hole obtained in the punching and reaming process is more accurate within the allowance range of the initial central hole; meanwhile, in the process of pressure sintering, the deformation position of the initial central hole of the matrix is basically concentrated at the diameter allowance position of the initial central hole, the influence on the matrix is extremely small, and the quality of the matrix is favorably improved.
Optionally, in step S2, the pressure for pressure forming is 150-160 tons, and the time is 2-5S.
By adopting the technical scheme, in the step, the diamond powder can be subjected to cold press molding at the designed part of the substrate to obtain the initial shape of the cutter teeth, and meanwhile, the influence of quick cold pressing on the substrate is small.
Optionally, in step S3, the pressure of the pressure sintering is 80-200KN, the temperature is 800-.
By adopting the technical scheme, the diamond powder and the matrix are firmly combined together at the temperature, and the deformation of the central hole part of the matrix can be more concentrated at the edge position of the central hole under the condition, so that the quality of the matrix of the central hole and the edge part of the central hole after punching and reaming can be improved.
Optionally, in step S3, the temperature of the initially formed circular saw blade is 350-.
Through adopting above-mentioned technical scheme, the temperature of hot punching press for the centre bore can be by more accurate punching press reaming, simultaneously, behind the punching press reaming, makes the organism because of the stress of punching press reaming etc. production can slowly be eliminated to the heat preservation process.
Optionally, after the step S1 and before the step S2, the substrate is pre-processed, the pre-processing step includes,
a1: and (3) continuously preserving the heat for 12-18h at the temperature of 850 ℃ and 750-.
By adopting the technical scheme, the base body generates certain deformation in the punching process of the punching machine, and the step flattens the base body, thereby being beneficial to improving the integral forming quality of the circular saw blade.
Optionally, before the pretreatment of the substrate, the substrate is subjected to flatness and stress detection, and when the flatness of the substrate is greater than 0.9mm or the stress is greater than 0.4mm, the pretreatment is performed, otherwise, the pretreatment is not performed.
By adopting the technical scheme, the base body can be screened to a certain degree, so that the relatively flat base body can be free from pretreatment.
Optionally, in step S1, reinforcing grooves are formed in the two side surfaces of the substrate, the reinforcing grooves extend from the edge of the substrate to the center of the substrate, the depth of the reinforcing grooves is 1/5-1/3 of the thickness of the substrate, the reinforcing grooves in the two side surfaces of the substrate are staggered with each other, any two adjacent reinforcing grooves on the circumference of the substrate are a long groove and a short groove, the length of the long groove is 5/8-6/8 of the distance from the edge of the substrate to the edge of the central hole, the length of the short groove is 2/8-3/8 of the distance from the edge of the substrate to the edge of the central hole, the surface of the reinforcing groove is roughened to obtain pits, and in step S2, the diamond powder is also pressure-molded in the reinforcing grooves.
By adopting the technical scheme, the arrangement of the reinforcing grooves can strengthen the matrix after the diamond powder is subjected to compression molding and sintering molding in the reinforcing grooves, and the diamond powder subjected to sintering molding has higher hardness and smaller elastic and plastic deformation, so that the elastic and plastic deformation of the obtained circular saw blade is reduced, the circular saw blade is not easy to generate end jump, and the cutting quality of the circular saw blade is effectively improved; the reinforcing grooves are not overlapped with each other, so that the strength of the matrix is increased greatly by the formed diamond powder in the reinforcing grooves; meanwhile, the side edge of the circular saw blade is more wear-resistant, so that the circular saw blade is not easily worn in the machining process, and the side protection effect is achieved.
Optionally, in step S1, a plurality of arc-shaped grooves are formed in the surfaces of the two sides of the base, the arc-shaped grooves use the axis of the base as an axis, all the arc-shaped grooves do not overlap each other along the circumferential direction of the base, the radii of the arc-shaped grooves are uneven and the sum of the central angles of all the arc-shaped grooves is not less than 360 degrees, and the arc-shaped grooves are communicated between two adjacent reinforcing grooves.
Through adopting above-mentioned technical scheme, the arc wall is further in the ascending distribution of the whole circumference of base member for the base member is further strengthened in the hoop, and the arc wall is in the arbitrary radial hoop of base member and the radial setting of arc wall, makes the increase to base member intensity of shaping diamond powder bigger in the arc wall.
Optionally, the diamond powder comprises a matrix and diamond powder, wherein the matrix comprises the following components of Cu20-30%, Fe10-15%, Sn8-10%, Ni8-10% and pre-alloyed powder 10-50%; the concentration of the diamond powder in the matrix is 45-55 ct/kg.
By adopting the technical scheme, the binding force between the cutter head part and the steel substrate is strong, and the tooth falling phenomenon is not easy to occur; and the elastic deformation and the plastic deformation of the base body are reduced more, the circular saw blade is not easy to generate end jump, and the product forming quality is improved.
In summary, the present application includes at least one of the following beneficial technical effects:
through setting up this process step, the primary center hole position still can produce certain deformation to reduce the deformation of other positions of base member, the primary center hole after the deformation has great machining allowance, is favorable to improving punching reaming's precision, has improved the precision of centre bore.
Drawings
FIG. 1 is a schematic view of the structure of one side of a substrate.
Fig. 2 is a schematic view of the side opposite to that of fig. 1, with one cutting head hidden.
Fig. 3 is an enlarged schematic view of a portion a of fig. 2.
Description of reference numerals: 1. a substrate; 11. a central bore; 12. saw teeth; 13. a fabrication hole; 14. a reinforcing groove; 15. a pit; 16. an arc-shaped slot; 17. a cutter head.
Detailed Description
The present application is described in further detail below with reference to the following figures 1-3.
The diamond powder is ZND2160 grade diamond, the granularity of the diamond is 45-50 meshes, and the manufacturer is Zhongnan diamond corporation;
pre-alloyed powder with the trade name of Z-FeCu30, the particle size of 200-300 meshes, manufactured by Hebei Huazui alloy welding materials Co., Ltd;
cu, electrolytic copper powder, 300 meshes, and the manufacturer is Tianjin casting metal materials Co., Ltd;
fe, reduced iron powder, 200 meshes, wherein the manufacturer is Sizu metal powder manufacturing Co., Ltd;
sn, electrolytic tin powder, 300 meshes, and the manufacturer is Hebei Yirui alloy welding materials Co., Ltd;
ni, electrolytic nickel powder, 300 mesh, manufacturer Beijing Xinglong Yuan technology, Inc.
Example 1
The embodiment of the application discloses a sintered diamond circular saw blade machining process. Referring to fig. 1 and 2, a sintered diamond circular saw blade processing process includes the steps of:
s1: punching a primary central hole, saw teeth and a fabrication hole by a steel belt through a punch, wherein the diameter of the primary central hole is smaller than the designed diameter of a central hole of a product by 2mm, the diameter of the primary central hole is smaller than the designed diameter of the central hole of the product by 2mm, the thickness of a matrix is 2mm, the diameter of the matrix is 250mm, then reinforcing grooves are formed in the surfaces of two sides of the matrix, the reinforcing grooves extend from the edge of the matrix to the center of the matrix, the depth of the reinforcing grooves is 1/5 of the thickness of the matrix, all the reinforcing grooves on the surfaces of the two sides of the matrix are mutually staggered, any two adjacent reinforcing grooves on the circumference of the matrix are a long groove and a short groove, the length of the long groove is 5/8 of the distance from the edge of the matrix to the edge of the central hole, the length of the short groove is 2/8 of the distance from the edge of the matrix to the edge of the central hole, coarsening can be directly performed on the surfaces of the reinforcing grooves by mechanical treatment or concave pits are formed or extruded, a plurality of arc-shaped grooves are formed on the surfaces of two sides of the base body, the arc-shaped grooves take the axis of the base body as the axis, all the arc-shaped grooves do not coincide with each other along the circumferential direction of the base body, the radii of the arc-shaped grooves are uneven and the same, the radii of any two adjacent arc-shaped grooves in the upward direction of the base body ring are different, the sum of central angles of all the arc-shaped grooves is 360 degrees, the arc-shaped grooves are communicated between the two adjacent reinforcing grooves, and then edging;
a1: leveling, namely detecting flatness and stress of the base body obtained in the step S1, and performing a pretreatment step when the flatness of the base body is larger than 0.9mm or the stress is larger than 0.4mm, otherwise, directly performing the step S2 without performing the pretreatment step; the pretreatment step comprises the steps of flattening the matrix (flattening pressure 60KN) and keeping the temperature for 12 hours at 750 ℃;
s2: the diamond powder is pressed and molded in the cutter head position and the reinforcing groove of the machine body, the diamond powder comprises a matrix and diamond powder, and the matrix comprises the following components of Cu 20%, Fe 15%, Sn 8%, Ni 10% and pre-alloyed powder 47%; the concentration of the diamond powder in the matrix is 45ct/kg, the pressure of pressure forming is 150 tons, the time is 2S, and a primary forming circular saw blade is obtained;
s3: and (2) carrying out pressure sintering on the preliminarily formed circular saw blade, wherein the pressure of the pressure sintering is 80KN, the temperature is 800 ℃, the time is 20min, then stamping and chambering the position of the preliminarily formed circular saw blade preliminary central hole while the preliminarily formed circular saw blade is hot to obtain a central hole with a designed diameter, the temperature of the preliminarily formed circular saw blade is 450 ℃ when the preliminarily formed circular saw blade is hot, and the temperature of the preliminarily formed circular saw blade is kept at 600 ℃ after stamping and chambering, and the time is 10 h.
Example 2
The difference from example 1 is that:
a sintered diamond circular saw blade processing technology comprises the following steps:
a1: leveling, namely detecting flatness and stress of the base body obtained in the step S1, and performing a pretreatment step when the flatness of the base body is larger than 0.9mm or the stress is larger than 0.4mm, otherwise, directly performing the step S2 without performing the pretreatment step; the pretreatment step comprises the steps of flattening the matrix (flattening pressure 80KN) and keeping the temperature for 14h at 800 ℃;
s2: the diamond powder is pressed and molded in the cutter head position and the reinforcing groove of the machine body, the diamond powder is the same as the embodiment 1, the pressure of the pressing and molding is 155 tons, the time is 3S, and a primary-formed circular saw blade is obtained;
s3: and (3) carrying out pressure sintering on the preliminarily formed circular saw blade, wherein the pressure of the pressure sintering is 140KN, the temperature is 830 ℃, the time is 26min, then carrying out punching and chambering on the position of the preliminarily formed circular saw blade preliminary central hole while the preliminarily formed circular saw blade is hot to obtain a central hole with a designed diameter, wherein the temperature of the preliminarily formed circular saw blade is 470 ℃ when the preliminarily formed circular saw blade is hot, and keeping the temperature of the preliminarily formed circular saw blade after punching and chambering for 12h, wherein the temperature of the heat preservation is 690 ℃.
Example 3
The difference from example 1 is that:
a sintered diamond circular saw blade processing technology comprises the following steps:
a1: leveling, namely detecting flatness and stress of the base body obtained in the step S1, and performing a pretreatment step when the flatness of the base body is larger than 0.9mm or the stress is larger than 0.4mm, otherwise, directly performing the step S2 without performing the pretreatment step; the pretreatment step comprises the steps of flattening the matrix (flattening pressure of 100KN) and keeping the temperature for 12-18h at 850 ℃;
s2: the diamond powder is pressed and molded in the cutter head position and the reinforcing groove of the machine body, the diamond powder is the same as the diamond powder in the embodiment 1, the pressure of the pressing and molding is 160 tons, and the time is 5S, so that the preliminarily molded circular saw blade is obtained;
s3: and (2) carrying out pressure sintering on the preliminarily formed circular saw blade, wherein the pressure of the pressure sintering is 200KN, the temperature is 900 ℃, the time is 30min, then carrying out punching and chambering on the position of the preliminarily formed circular saw blade preliminary central hole while the preliminarily formed circular saw blade is hot to obtain a central hole with a designed diameter, wherein the temperature of the preliminarily formed circular saw blade is 500 ℃ when the preliminarily formed circular saw blade is hot, and keeping the temperature of the preliminarily formed circular saw blade after punching and chambering at 800 ℃ for 14 h.
Example 4
The difference from example 2 is that:
fig. 1 and 2, S1: punching an initial central hole, sawteeth and a fabrication hole by a steel belt through a punch, wherein the diameter of the initial central hole is smaller than the designed diameter of a central hole of a product by 2.5mm, the diameter of the initial central hole is 2.2mm and the diameter of a base body is 50mm, then reinforcing grooves are formed in the surfaces of two sides of the base body, the reinforcing grooves extend from the edge of the base body to the center of the base body, the depth of the reinforcing grooves is 1/4 of the thickness of the base body, the reinforcing grooves on the surfaces of the two sides of the base body are mutually staggered, any two adjacent reinforcing grooves in the circumferential direction of the base body are a long groove and a short groove, the length of the long groove is 2/3 of the distance from the edge of the base body to the edge of the central hole, and the length of the short groove is 1/3 of the.
Example 5
The difference from example 2 is that:
fig. 1 and 2, S1: punching an initial central hole, sawteeth and a fabrication hole by a steel belt through a punch, wherein the diameter of the initial central hole is smaller than the design diameter of a central hole of a product by 3mm, the diameter of the initial central hole is smaller than the design diameter of the central hole of the product, the thickness of a matrix is 0.8mm, the diameter of the matrix is 350mm, then reinforcing grooves are formed in the surfaces of two sides of the matrix, the reinforcing grooves extend from the edge of the matrix to the center of the matrix, the depth of the reinforcing grooves is 1/3 of the thickness of the matrix, the reinforcing grooves on the surfaces of the two sides of the matrix are mutually staggered, any two adjacent reinforcing grooves on the circumference of the matrix are a long groove and a short groove, the length of the long groove is 6/8 of the distance from the edge of the matrix to the edge of the central hole, and the.
Example 6
The difference from example 2 is that:
the diamond powder comprises a matrix and diamond powder, wherein the matrix comprises the following components of Cu 25%, Fe 13%, Sn 9%, Ni 9% and prealloy powder 44%; the concentration of the diamond powder in the matrix is 50 ct/kg.
Example 7
The difference from example 2 is that:
the diamond powder comprises a matrix and diamond powder, wherein the matrix comprises the following components of Cu 30%, Fe 10%, Sn 10%, Ni 8% and prealloy powder 42%; the concentration of the diamond powder in the matrix is 55 ct/kg.
Comparative example 1
The difference from example 2 is that: punching a central hole, sawteeth and a process hole on the steel strip by a punch, wherein the central hole is a central hole with a designed diameter, and edging to obtain a matrix; then, the base and the diamond powder were subjected to pressure forming and pressure sintering under the same conditions as in example 2.
Comparative example 2
The difference from example 2 is that: and after the preliminarily formed circular saw blade is subjected to over-pressure sintering, reaming the position of the preliminary central hole to obtain a central hole with the designed diameter.
Comparative example 3
The difference from example 2 is that: the reinforcing groove and the annular groove are not formed.
Performance detection
The following tests were carried out on the circular saw blades obtained in examples 1 to 7 and comparative example 1:
detecting and recording the flatness (mm) of the circular saw blade by adopting a three-distant-point plane method according to GB/T11337-2004 'flatness error detection Standard';
according to GB/T6120-2012 'saw blade milling cutter standard', detecting the end face circular runout of the side gap face to the inner hole axis, and recording the difference between the maximum value and the minimum value of the runout as end runout (mm);
detecting the actual diameter of a central hole of the circular saw blade, measuring the actual diameter of the central hole for five times at different positions, then calculating the deviation, wherein the deviation is (the actual diameter of the central hole-the designed diameter of the central hole)/the designed diameter of the central hole multiplied by 100 percent, taking the absolute value of the deviation, and calculating and recording the average value of the deviations for 5 times;
the detection results are shown in Table 1
TABLE 1 Performance test results
Flatness (mm) Endplay (mm) Deviation (%)
Example 1 0.018 0.12 0.05
Example 2 0.010 0.07 0.02
Example 3 0.015 0.15 0.07
Example 4 0.007 0.05 0.01
Example 5 0.052 0.10 0.03
Example 6 0.019 0.08 0.02
Example 7 0.021 0.08 0.04
Comparative example 1 0.011 0.09 0.23
Comparative example 2 0.010 0.08 0.12
Comparative example 3 0.022 0.23 0.02
As can be seen from Table 1, in examples 1-7 and comparative example 1, the center hole precision of the round fastening piece of examples 1-7 is higher than that of comparative example 1, and the end jump and the flatness are smaller, which shows that the center hole processing technology of the process of the application is better, and the quality of the circular saw blade is higher.
In examples 1-3, the end jump, flatness, and variation of example 2 were smaller, so the process conditions of example 2 were better.
In examples 2 and 4 to 5, the difference between the thicknesses and the diameters of the circular saw blades is called Ada, which shows that the structure has better effect of improving the quality of the circular saw blades with different models within a certain range.
In examples 2 and 6 to 7, the formulations of the diamond powders were different, and the end jump, flatness and deviation of the circular saw blade of example 2 were smaller, indicating that the formulation of the diamond powder of example 2 was more excellent.
In example 2 and comparative examples 1 to 2, the deviation of the center hole of example 2 is much smaller than that of comparative examples 1 to 2, which shows that the center hole of example 2 is better in the related processing technology.
In example 2 and comparative example 3, the end jump and flatness of example 2 are higher in quality and precision of the circular saw blade due to the fact that comparative example 3 illustrates the reinforcing grooves and the annular grooves and the diamond powder sintered and formed in the reinforcing grooves and the annular grooves.
The above embodiments are examples of the present application, and the protection scope of the present application is not limited by these, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. A sintered diamond circular saw blade processing technology is characterized in that: the method comprises the following steps:
s1: punching an initial central hole (11), sawteeth (12) and a process hole (13) by a steel belt through a punch press, wherein the diameter of the initial central hole (11) is smaller than the designed diameter of the central hole (11) of the product, and edging to obtain a matrix (1);
s2: carrying out pressure forming on the matrix (1) and the diamond powder to obtain a primary formed circular saw blade;
s3: and (3) performing pressure sintering on the circular saw blade which is preliminarily formed, and then punching and reaming the position of the preliminary central hole (11) of the circular saw blade which is preliminarily formed while the circular saw blade is hot to obtain the central hole (11) with the designed diameter.
2. The sintered diamond circular saw blade machining process as claimed in claim 1, wherein: the diameter of the initial central hole (11) is 2-3mm smaller than the designed diameter of the product central hole (11), the thickness of the substrate (1) is 0.8-2.2mm, and the diameter is 50-350 mm.
3. The sintered diamond circular saw blade machining process as claimed in claim 1, wherein: in step S2, the pressure of the pressure molding is 150-160 tons for 2-5S.
4. The sintered diamond circular saw blade machining process as claimed in claim 1, wherein: in step S3, the pressure of the pressure sintering is 80-200KN, the temperature is 800-900 ℃, and the time is 20-30 min.
5. The sintered diamond circular saw blade machining process as claimed in claim 4, wherein: in step S3, the temperature of the initially formed circular saw blade is 350-450 ℃ when the circular saw blade is punched and reamed while the circular saw blade is hot, the temperature of the initially formed circular saw blade is kept at 800 ℃ after punching and reaming, and the temperature is kept at 600-10 h.
6. The sintered diamond circular saw blade machining process as claimed in claim 1, wherein: after step S1 and before step S2, the substrate (1) is pretreated, the pretreatment step includes,
a1: the substrate (1) is pressed flat and kept at the temperature of 750-850 ℃ for 12-18 h.
7. The sintered diamond circular saw blade machining process as claimed in claim 6, wherein: before the pretreatment of the matrix (1), the flatness and stress of the matrix (1) are detected, and when the flatness of the matrix (1) is larger than 0.9mm or the stress is larger than 0.4mm, the pretreatment is carried out, otherwise, the pretreatment is not carried out.
8. The sintered diamond circular saw blade machining process as claimed in claim 1, wherein: in the step S1, reinforcing grooves (14) are formed in the two side surfaces of the base body (1), the reinforcing grooves (14) extend from the edge of the base body (1) to the center direction of the base body (1), the depth of the reinforcing grooves (14) is 1/5-1/3 of the thickness of the base body (1), the reinforcing grooves (14) on the two side surfaces of the base body (1) are staggered with each other, two arbitrarily adjacent reinforcing grooves (14) on the circumference of the base body (1) are a long groove and a short groove, the length of the long groove is 5/8-6/8 of the distance from the edge of the base body (1) to the edge of the central hole (11), the length of the short groove is 2/8-3/8 of the distance from the edge of the base body (1) to the edge of the central hole (11), the surface of each reinforcing groove (14) is roughened to obtain a pit (15), and in step S2, the diamond powder is also pressure-molded in the reinforcing grooves (14).
9. The sintered diamond circular saw blade machining process as claimed in claim 8, wherein: in the step S1, a plurality of arc-shaped grooves (16) are formed in the surfaces of the two sides of the base body (1), the arc-shaped grooves (16) use the axis of the base body (1) as an axis, all the arc-shaped grooves (16) do not overlap with each other in the circumferential direction of the base body (1), the radiuses of the arc-shaped grooves (16) are different, the sum of central angles of all the arc-shaped grooves (16) is not less than 360 degrees, and the arc-shaped grooves (16) are communicated between the two adjacent reinforcing grooves (14).
10. The sintered diamond circular saw blade machining process as claimed in claim 1, wherein: the diamond powder comprises a matrix and diamond powder, wherein the matrix comprises the following components of Cu20-30%, Fe10-15%, Sn8-10%, Ni8-10% and pre-alloy powder 10-50%; the concentration of the diamond powder in the matrix is 45-55 ct/kg.
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CN106041427A (en) * 2016-06-29 2016-10-26 宝钢特钢有限公司 Production method of cylindrical forging
CN106142360A (en) * 2015-04-04 2016-11-23 河北小蜜蜂工具集团有限公司 A kind of preparation method of large dimond saw blade product
CN110306097A (en) * 2019-06-17 2019-10-08 丹阳市龙威工具有限公司 The method that diamond saw blade is prepared using cold pressing connection
CN111531097A (en) * 2020-04-26 2020-08-14 鞍钢重型机械有限责任公司 Forging method for eliminating wall thickness unevenness defect of cylinder type forging

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JPS6025616A (en) * 1983-07-19 1985-02-08 Sumitomo Electric Ind Ltd Preparation of composite blank
CN101439557A (en) * 2008-12-25 2009-05-27 唐山冶金锯片有限公司 Method for producing diamond circular saw film base body for mine
CN101590666A (en) * 2009-07-10 2009-12-02 丹阳市华锋钻石工具机械有限公司 A kind of processing method of diamond disc
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