CN112059928A - Diamond cylindrical grinding wheel and formula thereof - Google Patents
Diamond cylindrical grinding wheel and formula thereof Download PDFInfo
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- CN112059928A CN112059928A CN202010988166.4A CN202010988166A CN112059928A CN 112059928 A CN112059928 A CN 112059928A CN 202010988166 A CN202010988166 A CN 202010988166A CN 112059928 A CN112059928 A CN 112059928A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
- B24D3/04—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic
- B24D3/06—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements
- B24D3/10—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements for porous or cellular structure, e.g. for use with diamonds as abrasives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
- B24D18/0009—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using moulds or presses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
- B24D3/342—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties incorporated in the bonding agent
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
The invention discloses a cylindrical diamond grinding wheel and a formula thereof, wherein the cylindrical grinding wheel comprises a bonding agent layer and a transition layer; the formula of the cylindrical grinding wheel at least comprises diamond single crystals and one or more of the following raw materials: copper powder, iron powder, nickel powder, tin powder, lead powder, cobalt powder, resin powder, liquid paraffin, graphite powder and zinc stearate; the problem of current sintering type barrel grinding wheel shrink deformation easily mostly, and be difficult to restitution is solved.
Description
Technical Field
The invention relates to the technical field of manufacturing of optical lens processing molds, in particular to a cylindrical diamond grinding wheel and a formula thereof.
Background
A circular bonded grinding tool with a through hole in the center is made of diamond grinding material as raw material and metal powder, resin powder and ceramic as binding agent. In the process of processing optical lenses, a plurality of grinding wheels are generally used, including grinding wheel for edging, polishing wheel, spherical surface grinding wheel, fine grinding blade, cylindrical grinding wheel and the like, which are used for processing lenses, and different grinding wheels are used for different process steps, and the requirements are different. The cylindrical grinding wheel has the characteristics of high grinding speed, high stability, excellent performance and the like, and is widely used, but most of the conventional sintered cylindrical grinding wheels are easy to shrink and deform and difficult to reshape.
Disclosure of Invention
The invention aims to provide a cylindrical diamond grinding wheel and a formula thereof, and solves the problems that most of conventional sintered cylindrical grinding wheels are easy to shrink and deform and difficult to reshape.
In order to solve the technical problems, the invention adopts the following technical scheme:
a cylindrical diamond grinding wheel is composed of binding agent layer, transition layer and graphite layer, and has the following steps: preparing production, burdening, weighing, mixing, die filling, hot-pressing sintering and machining;
the production preparation method comprises the following steps:
a. cleaning the working table top and producing related articles, wherein the working table top and all the articles related to production need to be carefully cleaned before each production, so that the mutual pollution caused by different particle sizes is avoided, and the product quality is prevented from being influenced;
b. preparing a mould, selecting a matched mould according to the specification of an order product, and checking whether the mould is damaged or not and whether the size is correct or not;
c. a core die and a lower pressing die are arranged in a die cavity, the lower pressing die is matched with the die cavity to see whether the lower pressing die is tight or not so as to prevent material leakage, and the core die is concentric with the die cavity;
in the step of batching, the dosage of various raw materials is calculated according to the formula according to the requirement of the order variety; the formula of the cylindrical grinding wheel at least comprises diamond single crystals and one or more of the following raw materials: copper powder, iron powder, nickel powder, tin powder, lead powder, cobalt powder, resin powder, liquid paraffin, graphite powder and zinc stearate; during burdening, the raw material is divided into four parts, namely a diamond single crystal, a bonding agent, a transition layer and a graphite layer;
the binding agent comprises one or more of the following raw materials: copper powder, iron powder, tin powder, nickel powder, lead powder, cobalt powder and zinc stearate;
the transition layer comprises one or more of the following raw materials: copper powder, iron powder, tin powder, nickel powder and zinc stearate;
in the weighing step, the weights of diamond single crystals, binding agent layers, transition layers and graphite layers required by each cylindrical grinding wheel are calculated according to the specification of the cylindrical grinding wheel to be produced;
in the material mixing step, firstly, mixing a bonding agent, mixing the bonding agent and the diamond monocrystal, adding resin powder, mixing again, and then adding liquid paraffin and uniformly mixing for later use;
in the step of die filling, the mixed bonding agent, the transition layer and the graphite layer are sequentially added into a die to be compressed and taken out for later use;
in the step of hot-pressing sintering, the compacted model is sent to hot-pressing sintering equipment for calcination; in the machining step, the sintered cylindrical grinding wheel is assembled on a grinding wheel matrix according to the requirements of a drawing, then the grinding wheel is fixed on the grinding wheel matrix through welding, and the appearance is finished through an external grinding machine and electric sparks, so that the appearance size and the runout of the grinding wheel are ensured, and the requirements of the drawing are met.
Further, in the step of batching, the specification and model of the grinding wheel are determined firstly, and then the concentration of the diamond, the corresponding binding agent and the concentration thereof and the graphite powder are determined according to the specification and model as follows:
during production, the concentration of the diamond concentration in the specification is determined according to the specification and the model of the grinding wheel, and then selection is carried out.
Further, in the weighing step, the content of each ingredient in the binding agent layer is as follows:
the content of the liquid paraffin accounts for 3% -8% of the total amount of the diamond single crystal and the bonding agent, and the content of the resin powder accounts for 2% -8% of the total amount of the diamond single crystal and the bonding agent.
Further, in the transition layer, the specific mixture ratio is as follows:
| copper powder | Iron powder | Tin powder | Nickel powder | Zinc stearate |
| 50％-100％ | 0％-20％ | 0％-15％ | 0％-10％ | 0％-5％ |
Further, in the material mixing step, the required raw materials are classified and weighed by a 100 g tray balance, the bonding agent layer and the transition layer are respectively put into a 200 ml mortar for even grinding, the diamond single crystal and the bonding agent layer are put into a material mixing bottle and mixed on a ball mill for 3 hours, and liquid paraffin is dripped into the material mixing bottle and mixed for 1 hour for standby. When the resin type grinding wheel is produced, the diamond single crystal is added, simultaneously, the resin powder is added and mixed in the mechanical energy for mixing, the transition layer is mixed on a ball mill for 3 hours, and the liquid paraffin is dropped and mixed for 1 hour for standby.
Furthermore, in the mixing step, the mixing bottles indicate that the charged particle size, formula and the weight of each mixing bottle binder are not more than 400 g, the mixing sequence is changed from fine particle size to coarse particle size, mixing bottles with different particle sizes cannot be used in a mixing mode, and residual materials in the bottles need to be emptied out and then filled into newly prepared materials when the particle sizes are the same but the formulas are different.
Further, in the step of die filling, the weighed binding agent is filled into each die cavity, the charging amount in each die cavity is ensured to be consistent, after the materials are filled, a plastic rod is used for uniformly beating the die cavity, the binding agent in the die cavity is vibrated to be flat and compacted, an upper pressing die is used for flattening and compacting the binding agent in the die cavity, b, after the binding agent is filled, the transition layer powder is filled into the die cavity, the plastic rod is used for uniformly beating the die cavity, the transition layer material is vibrated to be flat, the transition layer material is flattened by the upper pressing die, c, graphite powder is uniformly filled into the die cavity for demoulding, the transition layer material is slightly vibrated to be flat, the upper pressing die is used for flattening and is filled into the die cavity, d, the die cavity is placed at the center of a hydraulic jack, and the upper pressing die is flattened and compacted.
Further, in the hot-pressing sintering step,
a. before sintering, starting a cooling circulating water system, and carefully checking whether cooling water circulation is normal;
b. after the cooling water circulation is confirmed to be normal, starting a power switch of the hot-pressing sintering machine, and after each system of the hot-pressing sintering machine runs normally, displaying a normal working picture on a display screen, and then carrying out sintering operation;
c. placing a die cavity to be sintered at the center of a small die block of the sintering machine, placing an upper die block on the die cavity, and ensuring that the upper die block and the die cavity are concentric with an upper pressure head and a lower pressure head of the sintering machine;
d. adjusting the position of an infrared temperature measuring point to ensure that the temperature measuring point is on the central line of the mold cavity and the temperature of the cylindrical grinding wheel to be sintered can be measured all the time;
e. starting a switch of the vacuum hot-pressing sintering machine, adjusting the power adjusting knob to a required position after the vacuum cover is closed, and automatically sintering the sintering machine according to the selected sintering process;
f. after sintering, the lower vacuum cover automatically returns to take out the upper die block and the die cavity for natural cooling;
g. taking out the cooled cylindrical grinding wheel from the die cavity, removing the core die by using a stripper, and h, inspecting the stripped cylindrical grinding wheel, putting the cylindrical grinding wheel into a self-sealing bag after the size and the appearance are qualified, and sticking a label to clearly write the name of a customer, the specification, the granularity, the quantity and the production date of the cylindrical grinding wheel.
Further, in the step of hot-pressing sintering, hot-pressing sintering is the most important step except for the treatment formula, and special attention needs to be paid to the sintering time, temperature and pressure, specifically, hot-pressing sintering is divided into six to eight sections, and the sintering time is as follows: 1000S-1700S, the sintering temperature is as follows: the temperature is 399-800 ℃, and the sintering pressure is as follows: 9 KN-45 KN. The scheme specifically provides the following schemes:
| scheme A | A segment of | Two segment | Three sections | Four sections | Five sections | Six sections | Seven segments | Eight sections |
| Time S | 30s | 1:10 | 1:10 | 2:10 | 1:30 | 6:00 | 5:00 | 3:20 |
| Temperature of | 399-409 | 409-455 | 455-520 | 520-600 | 600-650 | 650-800 | 800-800 | 800-400 |
| Pressure KN | 9 | 9 | 9 | 9-15 | 15-20 | 20-45 | 45 | 45-9 |
| Scheme B | A segment of | Two segment | Three sections | Four sections | Five sections | Six sections | Seven segments | Eight sections |
| Time S | 30 | 1:10 | 1:20 | 2:10 | 2:00 | 7:00 | 5:00 | 3:50 |
| Temperature of | 399-409 | 409-455 | 455-520 | 520-600 | 600-650 | 650-750 | 750-750 | 750-400 |
| Pressure KN | 9 | 9 | 9-15 | 15-20 | 20-25 | 25-40 | 40 | 40-9 |
| Scheme C | A segment of | Two segment | Three sections | Four sections | Five sections | Six sections | Seven segments |
| Time S | 30 | 1:10 | 2:30 | 3:30 | 3:00 | 6:00 | 2:30 |
| Temperature of | 399-409 | 409-455 | 455-545 | 545-650 | 650-700 | 700-700 | 700-400 |
| Pressure KN | 10 | 10 | 10 | 10-20 | 20-35 | 35 | 35-10 |
Further, the copper powder is electrolytic copper powder, the iron powder is reduced iron powder, the nickel powder is reduced nickel powder or electrolytic nickel powder, and the diamond monocrystal is an artificial diamond monocrystal.
Furthermore, the specification of the copper powder, the iron powder, the nickel powder, the tin powder, the lead powder and the cobalt powder is 300 meshes, the specification of the resin powder is 618P, the specification of the single artificial diamond is MBD4, the specification of the liquid paraffin is chemical purity, the specification of the graphite is industrial purity, and the specification of the zinc stearate is chemical purity.
Compared with the prior art, the invention has the beneficial effects that:
this scheme can the current sintering type cylindrical grinding wheel of effectual solution shrink deformation easily mostly, is difficult to the problem of restitution moreover, through the emery wheel that this application ratio sintered, wear resistance is good, stability is high, the superior performance.
The specific implementation mode is as follows:
in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The application provides a cylindrical diamond grinding wheel which comprises a structure, a formula and a processing technology. Specifically, the cylindrical diamond grinding wheel provided by the application mainly comprises a binding agent layer, a transition layer and a graphite layer, wherein the binding agent layer is mainly of a layer structure used by being combined with diamond, the transition layer is a layer to which the grinding wheel is combined with other equipment after being formed, and the graphite layer plays a role in demoulding in the processing process. The layers are combined in a certain sequence and then sintered to obtain the finished diamond cylindrical grinding wheel.
In a specific formulation provided in the application, the raw material of the whole diamond cylindrical grinding wheel comprises diamond single crystals and the following raw materials: the material is formed by combining copper powder, iron powder, nickel powder, tin powder, lead powder, cobalt powder, resin powder, liquid paraffin, graphite powder and zinc stearate, and is specifically divided into a bonding agent and a transition layer according to a layer structure, wherein the bonding agent comprises the following raw materials: copper powder, iron powder, tin powder, nickel powder, lead powder, cobalt powder and zinc stearate; the transition layer comprises the following raw materials: copper powder, iron powder, tin powder, nickel powder and zinc stearate.
During the production process, the following production process steps are carried out:
preparing production, burdening, weighing, mixing, die filling, hot-pressing sintering and machining;
wherein, the production preparation comprises the following steps:
a. cleaning the working table top and producing related articles, wherein the working table top and all the articles related to production need to be carefully cleaned before each production, so that the mutual pollution caused by different particle sizes is avoided, and the product quality is prevented from being influenced;
b. preparing a mould, selecting a matched mould according to the specification of an order product, and checking whether the mould is damaged or not and whether the size is correct or not;
c. and (3) filling a core mold and a lower pressing mold into the mold cavity, wherein the lower pressing mold is matched with the mold cavity to see whether the lower pressing mold is tight or not so as to prevent material leakage, and the core mold and the mold cavity are concentric.
In the step of batching, the dosage of various raw materials is calculated according to the formula according to the requirement of the order variety; then, the proportion is carried out according to specific specification models, specifically, the bonding agent is specifically used in combination with diamond, and can be divided into different bonding agents according to the size of the grinding wheel, and the embodiment specifically provides the following four bonding agents:
when the resin type grinding wheel is produced, a certain amount of resin powder is added into the mixture ratio to form the resin grinding wheel. The metal wheel utilizes the characteristics of metal, for example, cobalt is representative, the physical and chemical properties of cobalt determine that cobalt is an important raw material for producing heat-resistant alloy, hard alloy, anticorrosive alloy, magnetic alloy and various cobalt salts, cobalt is used as a binder in powder metallurgy to ensure that the hard alloy has certain toughness, the physical and chemical properties of cobalt powder are utilized in the binder to finally improve the wear resistance, heat resistance and corrosion resistance of the grinding wheel, and the toughness of the alloy is ensured without being too brittle. Similarly, nickel has good corrosion resistance, not only is used as a catalyst, but also is used for improving the corrosion resistance of the alloy, lead has excellent acid and alkali corrosion resistance, tin has a lower melting point and strong plasticity and is used for regulation, and zinc stearate is used as a heat stabilizer and a lubricant. Finally, the diamond is combined according to different proportions, so that the finally formed grinding wheel has excellent performance.
In the application, the specification and model of the grinding wheel are determined firstly, and then the concentration of diamond, the corresponding binding agent and the concentration thereof and the graphite powder are determined according to the specification and model as follows:
| grinding wheel diameter (mm) | Diamond concentration% | Binding agents | Binder concentration% + transition layer concentration% | Concentration of graphite layer% |
| Φ5—Φ14 | 15 | Scheme four | 86 | 1 |
| Φ15—Φ20 | 10 | Scheme four | 89 | 1 |
| Φ21—Φ25 | 10 | Scheme three | 89 | 1 |
| Φ26—Φ30 | 8 | Scheme three | 91 | 1 |
| Φ31—Φ40 | 6 | Scheme two | 93 | 1 |
| Φ41—Φ50 | 7 | Scheme two | 92 | 1 |
| Over phi 55 | 6 | Scheme one | 93 | 1 |
One solution for the% binder concentration +% transition layer concentration is: the concentration of the binding agent is 100 percent, the concentration of the transition layer is 0 percent, and the other scheme is as follows: 30% of binding agent and 70% of transition layer, and the other scheme is as follows: the concentration of the binding agent is 50%, and the concentration of the transition layer is 50%.
In the production, the diamond concentration in the specification is determined according to the specification and model of the grinding wheel, and then the weight of the used binding agent and diamond is calculated according to the number of cylindrical grinding wheels to be produced, such as: production of
20 grinding wheels with the grain size of 270/325 h, 8+3.5(h is the total height of the grinding wheel ring, 8 is the grinding layer height, and 3.5 is the transition layer), such as:
the grinding wheel comprises 2.7 g/20 and 54 g of the total weight, namely 54 g of the grinding wheel is needed, the content sum of the bonding agent and the transition layer is 100% -16% -1% to 83% when the content of diamond powder is 16%, and the total of the bonding agent and the transition layer is 80%, wherein the concentration of the bonding agent can be determined according to the height of the grinding layer, for example, 8 is the height of the grinding layer, 3.5 is the transition layer, the ratio of the height to the height is 8:3.5, the concentration of the bonding agent is 69.57%, and the concentration of the transition layer is 100% -69.57% to 30.43%. In the scheme, an extreme scheme is that the transition layer and the bonding agent both use the bonding agent, so that the transition layer is not needed, and the whole structure is an integral body. By calculation, total amount of binder: 54 × 83% × 69.57% ═ 31.18 g, total transition layer: 54 × 83% × 30.43 ═ 13.64 g, and the total diamond powder: 54 × 16% ═ 8.64 g. In this embodiment, the transition layer is a layer structure in contact with other structures, and the specific ratio is as follows:
| scheme(s) | Copper powder | Iron powder | Tin powder | Nickel powder | Zinc stearate |
| A | 100％ | 0 | 0 | 0 | 0 |
| B | 70％ | 20％ | 0 | 10％ | 0 |
| C | 50％ | 20 | 15％ | 10％ | 5％ |
In the formulation, an extreme practice is to replace all the raw materials in the transition layer with copper powder, specifically to produce according to the requirements of customers.
After all the proportions and the raw materials are determined, the required raw materials are weighed by a 100 g tray balance in a classified mode, a bonding agent layer and a transition layer are respectively placed into a 200 ml mortar and are uniformly ground, a diamond single crystal and the bonding agent layer are placed into a mixing bottle and are mixed for 3 hours on a ball mill, liquid paraffin is added and dropped and is mixed for 1 hour for later use, when a resin grinding wheel is produced, resin powder is added and mixed in mechanical energy while the diamond single crystal is added, liquid paraffin is added and dropped and is mixed for 1 hour for later use, the transition layer is mixed for 3 hours on the ball mill, the resin powder is added and is mixed for 1 hour, and the liquid paraffin is dropped and is mixed for 1 hour for later use.
It should be noted that in the mixing step, the mixing bottle indicates that the charged particle size, formula and number of the binder weight of each mixing bottle are not more than 400 g, the mixing sequence is changed from fine particle size to coarse particle size, mixing bottles with different particle sizes cannot be used in a mixing way, and residual materials in the bottles need to be emptied out and then filled into newly prepared materials when the particle sizes are the same but the formulas are different.
Before mixing materials in the second, third and fourth binding agent schemes, the used iron, nickel and cobalt must be reduced by hydrogen, the reduction temperature is 500 ℃, and the reduction time is not less than 45 minutes.
In the die filling step, a, filling the weighed binding agent into each die cavity, ensuring that the filling amount in each die cavity is consistent, uniformly beating the die cavity by using a plastic rod after filling, vibrating and compacting the binding agent in the die cavity, and flattening and compacting the binding agent in the die cavity by using an upper pressing die;
b. after the binding agent is filled, filling the transition layer powder into a die cavity, uniformly beating the die cavity by using a plastic rod, vibrating and flattening the transition layer material, and flattening the transition layer material by using an upper pressing die;
c. uniformly filling graphite powder into a die cavity, demoulding, slightly vibrating and flattening, flattening by using an upper pressing die, and filling the upper pressing die into the die cavity;
d. and placing the die cavity in the center of a hydraulic jack, and flattening and pressing the upper pressing die by using the jack.
After the grinding wheel is compacted, the grinding wheel can be molded only by sintering, and in the sintering process, hot-pressing sintering is used for completing sintering, and the method can be carried out according to the following steps:
a. before sintering, starting a cooling circulating water system, and carefully checking whether cooling water circulation is normal;
b. after the cooling water circulation is confirmed to be normal, starting a power switch of the hot-pressing sintering machine, and after each system of the hot-pressing sintering machine runs normally, displaying a normal working picture on a display screen, and then carrying out sintering operation;
c. placing a die cavity to be sintered at the center of a small die block of the sintering machine, placing an upper die block on the die cavity, and ensuring that the upper die block and the die cavity are concentric with an upper pressure head and a lower pressure head of the sintering machine;
d. adjusting the position of an infrared temperature measuring point to ensure that the temperature measuring point is on the central line of the mold cavity and the temperature of the cylindrical grinding wheel to be sintered can be measured all the time;
e. starting a switch of the vacuum hot-pressing sintering machine, adjusting the power adjusting knob to a required position after the vacuum cover is closed, and automatically sintering the sintering machine according to the selected sintering process;
f. after sintering, the lower vacuum cover automatically takes out the upper die block and the die cavity in a return stroke to enable the upper die block and the die cavity to be naturally cooled, g, the cooled cylindrical grinding wheel is taken out of the die cavity, and the core die is removed by a stripper;
h. and (4) inspecting the demoulded cylindrical grinding wheel, packaging the cylindrical grinding wheel into a self-sealing bag after the size and the appearance are qualified, and sticking a label to clearly write the name of a customer, the specification, the granularity, the quantity and the production date of the cylindrical grinding wheel.
The hot-pressing sintering is the most important step outside a treatment formula, the sintering time, temperature and pressure need special attention, specifically, the hot-pressing sintering is divided into six to eight sections, and the scheme provides the following three schemes:
| scheme A | A segment of | Two segment | Three sections | Four sections | Five sections | Six sections | Seven segments | Eight sections |
| Time S | 30s | 1:10 | 1:10 | 2:10 | 1:30 | 6:00 | 5:00 | 3:20 |
| Temperature of | 399 | 409 | 455 | 520 | 600 | 650 | 800 | 400 |
| Pressure KN | 9 | 9 | 9 | 12 | 15 | 40 | 45 | 9 |
| Scheme B | A segment of | Two segment | Three sections | Four sections | Five sections | Six sections | Seven segments | Eight sections |
| Time S | 30 | 1:10 | 1:20 | 2:10 | 2:00 | 7:00 | 5:00 | 3:50 |
| Temperature of | 409 | 455 | 520 | 600 | 650 | 750 | 750 | 400 |
| Pressure KN | 9 | 9 | 94 | 18 | 25 | 35 | 40 | 9 |
| Scheme C | A segment of | Two segment | Three sections | Four sections | Five sections | Six sections | Seven segments |
| Time S | 30 | 1:10 | 2:30 | 3:30 | 3:00 | 6:00 | 2:30 |
| Temperature of | 400 | 420 | 500 | 600 | 650 | 700 | 400 |
| Pressure KN | 10 | 10 | 10 | 15 | 30 | 35 | 10 |
After hot-pressing sintering, machining according to the requirement:
the sintered cylindrical grinding wheel is assembled on a grinding wheel matrix according to the requirements of customers, then the grinding wheel is fixed on the grinding wheel matrix through welding, and then the appearance is finished through an external grinding machine and electric sparks, so that the appearance size and the runout of the grinding wheel are ensured, and the requirements of customers are met. And then, the appearance of the grinding wheel is modified (such as sand blasting, nickel plating and the like), product specification marks are marked on the matrix after the steps are finished, anti-rust oil is coated on the matrix, and then the matrix is packaged and stored.
It should be noted that:
(1) before matching, checking whether the size of the substrate is correct according to the requirement of a customer;
(2) the difference between the inner hole of the grinding wheel ring and the matching position of the matrix is ensured to be within 0.02 mm, and the jumping of the grinding wheel matrix is ensured to be within 0.05 mm;
(3) electric spark shaping ensures that the jumping of the grinding wheel is within 0.05 mm;
(4) the matrix sand blasting and electroplating are required to be uniform and have no rusty spot, the mark is required to be clear and have no deflection, the mark on the packaging box is required to be clear and neat, the internal mark and the external mark are required to be consistent, and the packaging box has no oil stain.
Reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," "a preferred embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally in this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.
Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure and claims of this application. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.
Claims (10)
1. A diamond cylindrical grinding wheel and a formula thereof are characterized in that: the cylindrical grinding wheel comprises a bonding agent layer and a transition layer; the formula of the cylindrical grinding wheel at least comprises diamond single crystals and one or more of the following raw materials: copper powder, iron powder, nickel powder, tin powder, lead powder, cobalt powder, resin powder, liquid paraffin, graphite powder and zinc stearate.
2. A diamond barrel grinding wheel and its formulation as claimed in claim 1, wherein: the bonding agent layer comprises one or more of the following raw materials: copper powder, iron powder, tin powder, nickel powder, lead powder, cobalt powder and zinc stearate; the transition layer comprises one or more of the following raw materials: copper powder, iron powder, tin powder, nickel powder and zinc stearate.
3. A diamond barrel grinding wheel and its formulation as claimed in claim 1, wherein: the copper powder is electrolytic copper powder, the iron powder is reduced iron powder, the nickel powder is reduced nickel powder or electrolytic nickel powder, and the diamond monocrystal is an artificial diamond monocrystal.
4. A diamond barrel grinding wheel and its formulation as claimed in claim 1, wherein: the specification of the copper powder, the iron powder, the nickel powder, the tin powder, the lead powder and the cobalt powder is 300 meshes, the specification of the resin powder is 618P, the single specification of the artificial diamond is MBD4, the specification of the liquid paraffin is chemical purity, the specification of the graphite is industrial purity, and the specification of the zinc stearate is chemical purity.
5. A diamond barrel grinding wheel and its formulation as claimed in claim 1, wherein: the content of the diamond single crystal is 4% -20%, the content of the bonding agent and the transition layer is 95% -70%, and the content of the graphite powder layer is 1% -2%.
6. A diamond barrel grinding wheel and its formulation as claimed in claim 1, wherein: the content of each ingredient in the binding agent layer is as follows: 30-45% of copper powder, 10-30% of iron powder, 15-25% of tin powder, 10-35% of nickel powder, 5-10% of lead powder, 10-25% of cobalt powder and 2-7% of zinc stearate.
7. A diamond barrel grinding wheel and its formulation as claimed in claim 1, wherein: the transition layer comprises the following ingredients in percentage by weight: 50-100% of copper powder, 0-20% of iron powder, 0-15% of tin powder, 0-10% of nickel powder and 0-5% of zinc stearate.
8. A diamond barrel grinding wheel and its formulation as claimed in claim 1, wherein: the content of the liquid paraffin accounts for 3% -8% of the total amount of the diamond single crystal and the bonding agent.
9. A diamond barrel grinding wheel and its formulation as claimed in claim 1, wherein: the content of the resin powder is 2% -8% of the total amount of the diamond single crystal and the bonding agent.
10. A diamond barrel grinding wheel and its formulation as claimed in claim 1, wherein: the content of the graphite powder is 1% -4% of that of the diamond single crystal and the bonding agent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010988166.4A CN112059928A (en) | 2020-09-18 | 2020-09-18 | Diamond cylindrical grinding wheel and formula thereof |
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| CN202010988166.4A CN112059928A (en) | 2020-09-18 | 2020-09-18 | Diamond cylindrical grinding wheel and formula thereof |
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| CN112059928A true CN112059928A (en) | 2020-12-11 |
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| CN105382709A (en) * | 2015-11-05 | 2016-03-09 | 深圳市风火轮钻石科技有限公司 | Hard alloy grinding diamond grinding wheel and preparing method |
| CN106584287A (en) * | 2016-12-20 | 2017-04-26 | 钦州市星火计划办公室 | Ceramic grinding wheel and preparation method thereof |
| CN110355699A (en) * | 2019-05-19 | 2019-10-22 | 北京工业大学 | A kind of aluminium base diamond composite ELID grinding wheel for grinding and preparation method thereof |
| CN110640640A (en) * | 2019-05-16 | 2020-01-03 | 广东纳德新材料有限公司 | Metal-resin composite bonding agent diamond edge grinding wheel and manufacturing method thereof |
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2020
- 2020-09-18 CN CN202010988166.4A patent/CN112059928A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105382709A (en) * | 2015-11-05 | 2016-03-09 | 深圳市风火轮钻石科技有限公司 | Hard alloy grinding diamond grinding wheel and preparing method |
| CN106584287A (en) * | 2016-12-20 | 2017-04-26 | 钦州市星火计划办公室 | Ceramic grinding wheel and preparation method thereof |
| CN110640640A (en) * | 2019-05-16 | 2020-01-03 | 广东纳德新材料有限公司 | Metal-resin composite bonding agent diamond edge grinding wheel and manufacturing method thereof |
| CN110355699A (en) * | 2019-05-19 | 2019-10-22 | 北京工业大学 | A kind of aluminium base diamond composite ELID grinding wheel for grinding and preparation method thereof |
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