Machine tool base and method for manufacturing the same

Abstract

The embodiment of the application provides a machine tool base, which comprises a base shell and resin concrete filled into the base shell, the resin concrete comprises raw materials with the following mass percentages: aggregate 70%-85%, filler 5%-15%, and cementing material 5%-20%, wherein the aggregate comprises dry sand and stone, the dry sand accounts for 10%-20% of the total mass of the aggregate, the stone accounts for 80%-90% of the total mass of the aggregate, the stone comprises at least three kinds of stone with different particle sizes, the dry sand comprises: dry sand with a particle size of 0.074-0.106 mm, accounting for 72%-78% of the total mass of the dry sand; dry sand with a particle size of 0.053-0.074 mm, accounting for 20%-25% of the total mass of the dry sand; and dry sand with a particle size less than 0.053 mm, accounting for 1%-3% of the total mass of the dry sand. The machine tool base manufactured by the scheme of the application can greatly improve the compressive strength of the machine tool base.

Description

Technical Field

[0001] This application relates to the field of mechanical equipment technology, and in particular to a machine tool base and its manufacturing method. Background Technology

[0002] With the development and increasing demands of my country's high-tech fields such as aerospace, astronomical observation, laser nuclear fusion, military industry, modern medicine, and automobile manufacturing, increasingly higher requirements are being placed on machine tool equipment. As one of the core basic components of a machine tool, the machine tool base, in addition to supporting the weight of other unit components, also needs to have vibration damping capabilities. Traditionally, machine tool beds are mostly made of cast iron. However, cast iron cannot effectively reduce vibrations generated during machining, affecting machining accuracy and surface roughness. Furthermore, cast iron also suffers from problems such as complex manufacturing processes, high manufacturing costs, poor corrosion resistance, long processing cycles, and the inability to completely eliminate residual thermal stress. These drawbacks seriously deviate from the trend of green development.

[0003] To address the numerous problems associated with cast iron, resin concrete has been increasingly used in machine tool base fabrication in recent years. Resin concrete, as part of the machine tool base, offers advantages such as low cost, ease of molding, and high damping, effectively reducing machine tool vibration during machining. However, the strength of resin concrete is significantly lower than that of cast iron, frequently resulting in cracking, fracture, and low product strength and impact resistance when used as a machine tool base. These issues directly impact the machining performance of the machine tool, hindering its application in the field of precision machine tool bases. Summary of the Invention

[0004] To address the technical problems existing in the prior art, this application proposes a machine tool base, comprising: a base shell and resin concrete, wherein the resin concrete is filled into the base shell, and the resin concrete comprises the following raw materials by mass percentage: 70%-85% aggregate, 5%-15% filler, and 5%-20% binder, wherein the aggregate includes dry sand and stone, the dry sand accounting for 10%-20% of the total mass of the aggregate, and the stone accounting for 80%-90% of the total mass of the aggregate, wherein the stone comprises at least three grades of stone according to particle size, and the dry sand comprises: dry sand with a particle size of 0.074-0.106mm: accounting for 72%-78% of the total mass of dry sand; dry sand with a particle size of 0.053-0.074mm: accounting for 20%-25% of the total mass of dry sand; and dry sand with a particle size less than 0.053mm: accounting for 1%-3% of the total mass of dry sand.

[0005] As described above, the hardness of the stone material in the machine tool base is 220 MPa-260 MPa. The stone material includes: stone material with a particle size of 0.315-1.25 mm, accounting for 12%-19% of the total stone material mass; stone material with a particle size of 1.25 mm-5 mm, accounting for 28%-36% of the total stone material mass; and stone material with a particle size of 5 mm-15 mm, accounting for 46%-54% of the total stone material mass.

[0006] As described above, the hardness of the stone material in the machine tool base is 220 MPa-260 MPa. The stone material includes: stone with a particle size of 0.315-0.625 mm, accounting for 5%-8% of the total stone mass; stone with a particle size of 0.625 mm-1.25 mm, accounting for 7%-11% of the total stone mass; stone with a particle size of 1.25 mm-2.5 mm, accounting for 11%-15% of the total stone mass; stone with a particle size of 2.5 mm-5 mm, accounting for 17%-21% of the total stone mass; stone with a particle size of 5 mm-10 mm, accounting for 26%-30% of the total stone mass; and stone with a particle size of 10 mm-15 mm, accounting for 20%-24% of the total stone mass.

[0007] The machine tool base as described above further comprises: fibers, which account for 0.5-3% by mass.

[0008] As described above, the fiber in the machine tool base includes: copper-plated steel fibers with a diameter of 0.2mm-0.5mm and an aspect ratio of 60-80.

[0009] As described above, the filler in the machine tool base includes one or more of fly ash, quartz powder, and volcanic ash.

[0010] As described above, the adhesive for the machine tool base comprises the following raw materials in weight percentages: resin: 65%-80%, curing agent: 15-25%, diluent: 1-10%, and defoamer: 1-10%.

[0011] The machine tool base as described above, wherein the resin comprises: bisphenol A type epoxy resin E44 and bisphenol A type epoxy resin E51, and the mass ratio of the addition of bisphenol A type epoxy resin E44 and bisphenol A type epoxy resin E51 is 1:2-5.

[0012] As described above, the machine tool base includes a T31 modified curing agent, a diluent including isobutanol, and a defoamer being tributyl phosphate.

[0013] According to another aspect of this application, a method for preparing a machine tool base as described above is proposed, characterized in that the method includes: weighing the mass of aggregates of various grades, fillers, fibers, resin, curing agent, diluent, and defoamer according to the mixing ratio; sequentially adding the resin, curing agent, diluent, and defoamer into a mixing device and stirring to obtain a binder; adding the filler into the binder and stirring to obtain a binder mixture; adding the fibers to the aggregates of various grades and stirring evenly to obtain aggregate mixtures of various grades; sequentially adding the aggregate mixtures of various grades into the binder mixture in order of increasing particle size to obtain resin concrete, wherein each grade of aggregate is stirred for a predetermined time after addition; pouring the resin concrete into the base shell, vibrating to compact it, and curing to obtain the machine tool base.

[0014] The method described above, which involves pouring resin concrete into a mold, vibrating to compact it, and then curing it to obtain a machine tool base, includes: pouring resin concrete into a base shell; placing the poured base shell on a vibrating table to compact it; curing the base shell filled with resin concrete in a constant temperature environment of 80℃-90℃ for 3-8 days, and then curing it at room temperature for 1-3 days to obtain the machine tool base.

[0015] As described above, the vibration time of the vibration table is 10-20 minutes, the vibration frequency is 40-50 Hz, and the amplitude is 0.2-0.4 mm.

[0016] As described above, the stirring time is 20s-60s.

[0017] This application optimizes the aggregate gradation by adding dry sand to the aggregate, resulting in the lowest porosity in the resin concrete and thus the highest compressive strength. Furthermore, in the preparation method of the machine tool base, the aggregates are added to the binder mixture in ascending order of particle size. This allows smaller aggregates to fill the gaps between larger aggregates, increasing the concrete's density and uniformity. This helps prevent cracking and fracture during use and also improves the mechanical properties and stability of the machine tool concrete base. Attached Figure Description

[0018] The preferred embodiments of this application will now be described in further detail with reference to the accompanying drawings, wherein:

[0019] Figure 1 This is a schematic flowchart of a machine tool base preparation method according to an embodiment of this application;

[0020] Figure 2 This is a schematic flowchart of a resin concrete curing method according to an embodiment of this application;

[0021] Figure 3This is a schematic flowchart of a machine tool base preparation method according to another embodiment of this application;

[0022] Figure 4 This is a schematic flowchart of a coupling processing method according to an embodiment of this application;

[0023] Figure 5 This is a data recording table for compressive strength test according to one embodiment of this application;

[0024] Figure 6 This is a load versus time curve for testing the compressive strength of a resin concrete block according to an embodiment of this application; and

[0025] Figure 7 This is a line graph of compressive strength according to an embodiment of this application. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] In the following detailed description, reference can be made to the accompanying drawings, which form part of this application and illustrate specific embodiments of the present application. In the drawings, similar reference numerals describe substantially similar components in different figures. Specific embodiments of the present application are described in sufficient detail below to enable those skilled in the art to implement the technical solutions of the present application. It should be understood that other embodiments may also be utilized, or structural, logical, or electrical changes may be made to the embodiments of the present application.

[0028] To address the numerous problems existing in resin concrete machine tool bases, this application improves the raw material ratio and preparation process of the resin concrete. The improved resin concrete base provides both excellent vibration damping for the machine tool and high compressive strength, thus extending its service life. The improvements regarding the resin concrete raw material ratio are as follows:

[0029] This application proposes a novel machine tool base, comprising: a base shell and resin concrete, wherein the resin concrete is filled into the base shell, and the resin concrete comprises the following raw materials by mass percentage: 70%-85% aggregate, 5%-15% filler, and 5%-20% binder, wherein the aggregate comprises: dry sand and stone, with dry sand accounting for 10%-20% of the total mass of aggregate and stone accounting for 80%-90% of the total mass of aggregate, and the stone comprising at least three grades of stone according to particle size; the dry sand comprising: dry sand with a particle size of 0.074-0.106mm: accounting for 72%-78% of the total mass of dry sand; dry sand with a particle size of 0.053-0.074mm: accounting for 20%-25% of the total mass of dry sand; and dry sand with a particle size less than 0.053mm: accounting for 1%-3% of the total mass of dry sand.

[0030] A machine tool base is the fundamental component of a machine tool, used to support other units within the machine tool. The machine tool can be any type commonly found in the mechanical field, such as a lathe, milling machine, boring machine, planer, grinding machine, drilling machine, or CNC machine tool. Those skilled in the art should understand that a machine tool base can also be a component within the machine tool's bed, such as the machine tool housing or robotic arm.

[0031] Aggregate gradation refers to the proportion of particles of different sizes in an aggregate system. The design of aggregate gradation aims to meet the performance requirements of concrete engineering materials. Through reasonable aggregate gradation design, the compactness, mechanical properties, stability, and durability of materials can be improved. In resin concrete, compressive strength is a key mechanical property. Aggregate gradation is one of the important factors affecting the compressive strength of resin concrete. Studies have found that when the aggregate gradation contains more coarse aggregate and less fine aggregate, the fine aggregate cannot effectively fill the voids created by the accumulation of coarse aggregate, resulting in excessive porosity and lower compressive strength. Conversely, when there is less coarse aggregate and more fine aggregate, the coarse aggregate is suspended and cannot form a dense skeletal structure. Only when the voids created by the accumulation of coarse aggregate are precisely filled by fine aggregate can the entire resin concrete form a dense skeletal structure, achieving the lowest aggregate porosity and the highest compressive strength.

[0032] Based on the above conclusions, this application, through extensive experimental research, found that by adding dry sand (i.e., fine aggregate) of different particle sizes to the aggregate, with the dry sand accounting for 10%-20% of the total aggregate mass, the dry sand includes: dry sand with a particle size of 0.074-0.106 mm, accounting for 72%-78% of the total dry sand mass; dry sand with a particle size of 0.053-0.074 mm, accounting for 20%-25% of the total dry sand mass; and dry sand with a particle size less than 0.053 mm, accounting for 1%-3% of the total dry sand mass, the addition of dry sand optimizes the aggregate gradation formula, resulting in the lowest porosity in the resin concrete, thereby maximizing the compressive strength of the resin concrete.

[0033] In the embodiments of this application, the hardness of the stone is 220 MPa-260 MPa, and the stone includes: stone with a particle size of 0.315-1.25 mm, which accounts for 12%-19% of the total mass of the stone; stone with a particle size of 1.25 mm-5 mm, which accounts for 28%-36% of the total mass of the stone; and stone with a particle size of 5 mm-15 mm, which accounts for 46%-54% of the total mass of the stone.

[0034] The aggregate can be granite with a hardness of 220-260 MPa. The filler includes one or more of fly ash, quartz powder, and volcanic ash. In addition to adding dry sand to the aggregate, this application also optimizes the gradation of the aggregate. As mentioned above, the aggregate includes: aggregate with a particle size of 0.315-1.25 mm, accounting for 12%-19% of the total aggregate mass; aggregate with a particle size of 1.25 mm-5 mm, accounting for 28%-36% of the total aggregate mass; and aggregate with a particle size of 5 mm-15 mm, accounting for 46%-54% of the total aggregate mass. The compressive strength of the resin concrete obtained according to the above aggregate and dry sand proportions meets the strength requirements of the machine tool base.

[0035] In another embodiment of this application, the hardness of the stone is 220 MPa-260 MPa, and the stone includes: stone with a particle size of 0.315-0.625 mm, accounting for 5%-8% of the total mass of the stone; stone with a particle size of 0.625 mm-1.25 mm, accounting for 7%-11% of the total mass of the stone; stone with a particle size of 1.25 mm-2.5 mm, accounting for 11%-15% of the total mass of the stone; stone with a particle size of 2.5 mm-5 mm, accounting for 17%-21% of the total mass of the stone; stone with a particle size of 5 mm-10 mm, accounting for 26%-30% of the total mass of the stone; and stone with a particle size of 10 mm-15 mm, accounting for 20%-24% of the total mass of the stone.

[0036] This application further optimizes the aggregate mix proportions, which include: aggregate with a particle size of 0.315-0.625mm, accounting for 5%-8% of the total aggregate mass; aggregate with a particle size of 0.625mm-1.25mm, accounting for 7%-11% of the total aggregate mass; aggregate with a particle size of 1.25mm-2.5mm, accounting for 11%-15% of the total aggregate mass; aggregate with a particle size of 2.5mm-5mm, accounting for 17%-21% of the total aggregate mass; aggregate with a particle size of 5mm-10mm, accounting for 26%-30% of the total aggregate mass; and aggregate with a particle size of 10mm-15mm, accounting for 20%-24% of the total aggregate mass. This application refines the aggregate mix proportions into six particle size levels. The resin concrete obtained according to the above proportions can minimize the porosity of the resin concrete, achieve the densest skeleton structure, and maximize the compressive strength of the resin concrete.

[0037] According to embodiments of this application, the resin concrete further includes fibers, with a mass percentage of 0.5-3%. The fibers include copper-plated steel fibers with a diameter of 0.2-0.5 mm and an aspect ratio of 60-80. Adding an appropriate amount of fibers to the resin concrete can enhance the bonding stress between the resin and aggregate. However, the amount of fiber added, as well as the diameter and length of the fibers, will affect the bonding stress between the resin and aggregate. Specifically, when the amount of steel fibers added to the resin concrete is small, they are too dispersed in the aggregate and do not enhance the bonding stress. When the amount of steel fibers added is large, it increases the porosity of the resin concrete, leading to a decrease in the compressive strength of the resin concrete. Furthermore, excessive steel fibers can cause agglomeration in the aggregate, affecting the compressive strength. Therefore, adding 0.5-3% fiber to the resin concrete, preferably 0.7%, can most significantly improve the compressive strength of the resin concrete.

[0038] The aspect ratio is the ratio of the effective length of a fiber to its diameter. For example, if the aspect ratio of a fiber is 60 and its diameter is 0.2 mm, then the effective length of the fiber is 12 mm. Because the maximum interfacial shear stress does not change with fiber length, the average interfacial shear stress decreases with increasing fiber length, and the length of the ineffective fiber segment (with zero shear stress) increases with increasing fiber length. Assuming that the interfacial bond strength is not affected by fiber length, when the fiber is short, the average interfacial shear stress is high, making interfacial shear failure more likely and failing to provide a good reinforcement effect. When the fiber length is long, the average interfacial shear stress is low, making interfacial shear failure less likely, but the increased length of the ineffective fiber segment leads to fiber waste and also fails to provide a good reinforcement effect.

[0039] Furthermore, when the fiber length is short, the interfacial bonding strength between the resin and aggregate in resin concrete is low, and the fibers often exhibit a pull-out state when the resin concrete undergoes bending fracture. As the fiber length increases, the interfacial bonding strength also increases. However, when the fiber length continues to increase, it leads to poor fiber dispersion in the resin concrete, thereby increasing the porosity and reducing the strength of the resin concrete. Therefore, selecting a fiber aspect ratio of 60-80 and a diameter of 0.2mm-0.5mm can improve the compressive strength of the resin concrete while reducing the amount of fiber used and lowering manufacturing costs. Moreover, copper plating on the surface of the steel fibers can prevent corrosion and reduce axial tensile stress.

[0040] According to one embodiment of this application, the binder comprises the following raw materials in weight percentages: resin: 65%-80%, curing agent: 15-25%, diluent: 1-10%, and defoamer: 1-10%. The resin comprises bisphenol A epoxy resin E44 and bisphenol A epoxy resin E51, with an addition weight ratio of 1:2-5 for bisphenol A epoxy resin E44 and bisphenol A epoxy resin E51. The curing agent comprises T31 modified curing agent, the diluent comprises isobutanol, and the defoamer is tributyl phosphate.

[0041] Cementitious binders are used to firmly bond fillers and aggregates in resin concrete to form a strong concrete. The resin that primarily acts as the binder in the cementitious binder includes two parts of type A epoxy resin E44 and bisphenol A epoxy resin E51. When the mass ratio of bisphenol A epoxy resin E44 to bisphenol A epoxy resin E51 is 1:2-5, the mechanical properties of the resin concrete can be significantly improved. Preferably, when the mass ratio of bisphenol A epoxy resin E44 to bisphenol A epoxy resin E51 is approximately 1:2.3, i.e., the resin contains 30% bisphenol A epoxy resin E44 and 70% bisphenol A epoxy resin E51, the mechanical properties of the resin concrete reach their maximum.

[0042] Hardeners react chemically with resins, triggering polymerization or cross-linking reactions that transform the resin from a liquid or viscous state into a hard solid. The resulting chemical bond structure enhances the strength and durability of concrete. Using T31 modified hardener not only increases the strength of concrete but also accelerates the resin's curing speed, shortens the curing time of resin concrete, and improves manufacturing efficiency.

[0043] Diluents reduce resin viscosity, making it easier to coat and cast onto aggregates and fillers, resulting in more uniform resin distribution. Furthermore, diluents reduce resin usage, saving costs. Acetone is a commonly used diluent, but this application uses isobutanol. Compared to acetone, isobutanol improves the mechanical properties of resin concrete. Moreover, to produce the same quality of resin concrete, less isobutanol is needed compared to acetone, reducing manufacturing costs. Experimental calculations show that diluent consumable costs can be reduced by 30%-50%.

[0044] Defoamers reduce surface tension, making it easier for air bubbles to escape from concrete, thereby reducing or eliminating the formation of pores and air bubbles in resin concrete and lowering porosity. Reducing air bubbles and porosity in resin concrete improves its mechanical properties, including compressive strength and flexural strength.

[0045] Regarding the aforementioned machine tool base, this application also discloses a method for manufacturing the machine tool base, such as... Figure 1As shown, the preparation method includes:

[0046] S101, Weigh the mass of each raw material resin, curing agent, diluent and defoamer in each grade of aggregate, filler, fiber and binder according to the mixing ratio;

[0047] S102, resin, curing agent, diluent and defoamer are added to a mixing device in sequence and stirred to obtain a binder;

[0048] S103, add filler to binder and stir to obtain binder mixture;

[0049] S104, the fibers are added to each grade of aggregate and stirred evenly to obtain an aggregate mixture of each grade;

[0050] S105, the aggregate mixtures of each grade are added to the binder mixture in order of increasing particle size to obtain resin concrete. Each time a grade of aggregate is added, the mixture is stirred for a predetermined time.

[0051] S106, resin concrete is poured into the base shell, vibrated to compact it, and cured to obtain the machine tool base.

[0052] As described above, this application optimizes the aggregate gradation, avoiding discontinuities caused by excessively large aggregate sizes, which would otherwise hinder uniform aggregate distribution. To further ensure uniform aggregate distribution in resin concrete, this application optimizes the preparation method of the machine tool base, namely, adding aggregates sequentially to the binder mixture in ascending order of aggregate particle size. Specifically, firstly, the raw materials are weighed according to their respective weight percentages in the resin concrete. Then, the resin, curing agent, diluent, and defoamer from the raw materials are added to a mixing device and rapidly stirred for 1-3 minutes to obtain a binder. The rapid stirring speed is 285±10 r / min (rotation speed) and 125±10 r / min (revolution speed). Next, fillers are added to the binder and slowly stirred for 1-3 minutes to obtain a binder mixture. The slow stirring speed is 140±5 r / min (rotation speed) and 62±5 r / min (revolution speed). Then, fibers are added to the aggregates according to their respective proportions and mixed evenly to obtain an aggregate mixture. Next, the aggregate mixtures are added to the binder mixture in ascending order of particle size to obtain resin concrete. Finally, the resin concrete is poured into the base shell and cured to obtain the machine tool base. The predetermined mixing time is 20-60 seconds.

[0053] Adding aggregates to the binder mixture in ascending order of particle size allows smaller aggregates to fill the gaps between larger aggregates, increasing the density and uniformity of the concrete. This helps prevent cracking and breakage during use and also improves the mechanical properties and stability of the machine tool concrete base.

[0054] Figure 2 This is a schematic flowchart of a resin concrete curing method according to an embodiment of this application. Figure 2 As shown, the method includes:

[0055] S201, pour resin concrete into the base shell;

[0056] S202, Place the cast base shell on a vibration table and vibrate it to compact it;

[0057] S203 involves curing the base shell filled with resin concrete in a constant temperature environment of 80℃-90℃ for 3-8 days, and then curing it at room temperature for 1-3 days to obtain the machine tool base.

[0058] In S201, after preparing the base shell, the pre-prepared resin concrete is poured into the base shell. Simultaneously, attention must be paid to parameters such as the pouring temperature and viscosity of the resin concrete to ensure smooth pouring.

[0059] In S202, after the resin concrete is poured, the base shell is placed on a vibrating table for compaction. Prepared resin concrete is added as needed to ensure complete filling and a smooth surface. Vibration helps eliminate voids and air bubbles in the concrete, improving its density and uniformity. The vibration time on the vibrating table is 10-20 minutes, the vibration frequency is 40-50 Hz, and the amplitude is 0.2-0.4 mm.

[0060] In S203, after vibration compaction, the resin-filled base shell is placed in a constant-temperature environment for curing. The curing temperature is within the range of 80℃-90℃, which accelerates the hardening and solidification process of the resin concrete. The curing time is generally 3-8 days, adjusted according to the properties of the resin concrete and the desired curing effect. Following constant-temperature curing, the base shell is then cured at room temperature for 1-3 days to ensure the strength and stability of the resin concrete, ultimately resulting in the machine tool base. During this period, attention must be paid to curing conditions to avoid excessively rapid or insufficient curing, which could lead to unsatisfactory concrete quality.

[0061] In machine tool base applications, resin concrete requires excellent vibration damping performance to ensure the stability and machining accuracy of the machine tool system. However, while ensuring vibration damping performance, compressive strength is also crucial. This is because, as a high-strength material, the compressive strength of resin concrete directly affects the durability and service life of the machine tool base. During machine tool processing, the base needs to withstand constant machining loads and repetitive impact loads. The high compressive strength of resin concrete ensures that it is not easily deformed or damaged under these loads, thus guaranteeing the stability, machining accuracy, and long-term service life of the machine tool system. Insufficient compressive strength of the resin concrete can lead to deformation or damage to the machine tool base, resulting in a shortened service life and even directly affecting the machining accuracy and production quality. Therefore, for resin concrete machine tool bases, the compressive strength and vibration damping performance of the resin concrete are equally important and need to be designed and selected according to specific application conditions to ensure that its overall performance meets the requirements. This application... Figure 1 Based on the previous method, the preparation method of the machine tool base was further optimized, which improved the compressive strength of the machine tool base.

[0062] Figure 3 This is a schematic flowchart of a machine tool base manufacturing method according to another embodiment of this application. Figure 3 As shown, the preparation method includes:

[0063] S301, Weigh the mass of each raw material in each grade of aggregate, filler and binder according to the mix proportion;

[0064] S302, the aggregates of each grade are soaked in a coupling agent solution for coupling treatment;

[0065] S303, add all the raw materials in the binder to the mixing equipment and mix rapidly for 1-3 minutes to obtain the binder;

[0066] S304, add filler to binder and stir slowly for 1-3 minutes to obtain binder mixture;

[0067] S305, after coupling treatment, all grades of stone and dry sand are added to the binder mixture in order of increasing particle size to obtain resin concrete. Each grade of aggregate is mixed for a predetermined time after addition.

[0068] S306, resin concrete is poured into the base shell, vibrated to compact, and cured to obtain the machine tool base.

[0069] Figure 3 and Figure 1 The preparation methods and steps are not entirely the same, and the steps that are the same will not be described again here. Figure 3 and Figure 1Compared to other preparation methods, this method adds a coupling treatment step for each grade of aggregate. A coupling agent is a chemical substance used to improve the adhesion between two incompatible substances. Immersing each grade of aggregate in a coupling agent solution improves the surface properties of the aggregate, making it easier to bond with the resin and thus improving the mechanical properties of the resin concrete.

[0070] The coupling agent in this application can be a silane coupling agent, including KH550. The silane coupling agent can chemically react with the resin and aggregate respectively, establishing chemical bonds between the resin and aggregate, increasing the interfacial bond strength between them, thereby improving the compressive strength of the resin concrete. After hydrolysis, the silane coupling agent bonds with the aggregate via hydrogen bonds and is dehydrated under heating conditions, ultimately forming stable chemical bonds between the aggregate and the silane coupling agent.

[0071] This application employs a coupling treatment method where aggregates are immersed in a coupling agent solution. This ensures that each surface of the aggregate is covered with the coupling agent, achieving uniform coverage. The coupling agent solution comprises a silane coupling agent, deionized water, and anhydrous ethanol. The mass ratio of the silane coupling agent, deionized water, and anhydrous ethanol is 1:3-5:3-6. This mass ratio directly affects the coupling effect on the aggregates. For example, adding too much silane coupling agent increases costs, while adding too little results in uneven coupling and fails to achieve the desired treatment effect. Therefore, the mass ratio of silane coupling agent, deionized water, and anhydrous ethanol (1:3-5:3-6) is determined based on factors such as the aggregate's mass, shape, and particle size, maximizing the effectiveness of the coupling agent without waste.

[0072] The coupling agent solution is determined based on the total mass of each grade of stone, and then prepared according to the mixing ratio. One method is to evenly distribute the prepared coupling agent solution into multiple containers according to the total grade of the stone. Another method is to allocate 30% of the coupling agent solution to containers for soaking smaller-sized stones, such as stones with a diameter of 0.315-0.625 mm and 0.625-1.25 mm; and allocate 70% of the coupling agent solution to containers for soaking larger-sized stones, such as stones with a diameter of 1.25-2.5 mm, 2.5-5 mm, 5-10 mm, and 10-15 mm. Distributing different masses of coupling agent solution according to particle size prevents smaller-sized stones from clumping due to excessive coupling agent, while ensuring that larger-sized stones undergo sufficient chemical reaction, thus improving the effectiveness of the coupling treatment.

[0073] Optionally, the machine tool base preparation method further includes, between S304 and S305: 0.5-3% fiber, the fiber is added to each grade of aggregate and each grade of dry sand that have been coupled and stirred evenly to obtain a mixture of aggregates and dry sand of each grade; the mixture of aggregates and dry sand of each grade is added to the binder mixture in order of increasing particle size to obtain resin concrete.

[0074] Figure 4 This is a schematic flowchart of a coupling processing method according to an embodiment of this application. Figure 4 As shown, the method includes:

[0075] S401, each grade of stone is placed in the coupling agent solution and soaked for a first time period;

[0076] S402, the coupled stones of all grades are placed in an oven and baked at a constant temperature for the second time period;

[0077] S403 involves placing the baked stone materials of all grades in a room-temperature dry environment for the third cooling period.

[0078] In step S401, each grade of aggregate is immersed in a container filled with a coupling agent solution, allowing the aggregate to fully react chemically with the coupling agent. The first time period is 12-18 minutes. This 12-18 minutes is sufficient for all aggregates to come into contact with the coupling agent and undergo a complete chemical reaction.

[0079] In S402, the aggregate is placed in an oven and baked at a specific temperature, which helps to cure the coupling agent. The second time period is 3-7 hours, and the oven temperature is kept constant at 55℃-65℃.

[0080] In S403, the aggregate is cooled in a dry environment at room temperature, which stabilizes the treated aggregate. The third time period is 20-40 minutes.

[0081] To more clearly illustrate the advantages that can be obtained from the embodiments of this application, the advantages of the machine tool base and the preparation method of the embodiments of this application are described in detail below with reference to specific experiments.

[0082] This application designed comparative experiments to demonstrate that optimizing the aggregate gradation by adding dry sand improves the compressive strength of resin concrete; it also demonstrates that adding aggregates in an order of increasing particle size during the preparation of the machine tool base further improves the compressive strength of the resin concrete. Specific experimental details are as follows:

[0083] Experiment 1:

[0084] The method for preparing the machine tool base in this embodiment is as follows:

[0085] 1. Crush, wash, dry, and grade the aggregate, then sieve it. Weigh the aggregate according to the aggregate gradation; the aggregate is granite, totaling 1200g. (The aggregate is then listed as follows:)

[0086] Particle size 0.315-0.625mm, 216g, accounting for 18% of the total aggregate mass;

[0087] Particle size 0.625mm-1.25mm, 96g, accounting for 8% of the total aggregate mass;

[0088] Particle size 1.25mm-2.5mm, 144g, accounting for 12% of the total aggregate mass;

[0089] Particle size 2.5mm-5m, 204g, accounting for 17% of the total aggregate mass;

[0090] Particle size 5mm-10mm, 300g, accounting for 25% of the total aggregate mass;

[0091] Particle size 10mm-15mm, 240g, accounting for 20% of the total aggregate mass.

[0092] 2. According to the mixing ratio, weigh out 30.6g of the required steel fiber and add it to each grade of aggregate according to the ratio and mix evenly.

[0093] 3. According to the mixing ratio, weigh out 44.6g of epoxy resin E44, 104g of epoxy resin E51, 37.1g of T31 modified curing agent, 14.5g of isobutanol, and 150g of fly ash.

[0094] 4. Add epoxy resin, curing agent, and diluent (isobutanol) to the mixer in sequence, and stir rapidly for 2 minutes to obtain the binder.

[0095] 5. Add fly ash to the binder and stir slowly for 2 minutes to obtain a mixture.

[0096] 6. Add the mixed aggregate and fiber together to a mixer containing binder and mix slowly for 8 minutes to obtain resin concrete.

[0097] 7. Pour the resin concrete into a mold coated with a release agent, and then place it on a vibrating table for compaction. The vibration time is 15 minutes, the vibration frequency is 45 Hz, and the amplitude is 0.25 mm.

[0098] 8. After curing the prepared specimens at room temperature for 24 hours, demold them.

[0099] 9. After demolding, the test block was cured at a constant temperature of 85℃ for 5 days, and then cured at room temperature for 1 day to obtain the finished product.

[0100] In step 7, to test the compressive strength of the resin concrete block, resin concrete is poured into a mold. In the actual production of the machine tool base, the mixed resin concrete is directly poured into the base shell and cured to obtain the machine tool base. The experimental procedure differs slightly from the actual production procedure.

[0101] Once the finished product is obtained, the compressive strength of the resin concrete can be tested. The testing method is as follows:

[0102] 1. Prepare 50*50*50 resin concrete test blocks and cure them according to the curing method until the specified age.

[0103] 2. When the specimens reach the test age, remove them from the curing location, check their size and shape, and then conduct the test as soon as possible.

[0104] 3. Before placing the specimen in the testing machine, the surface of the specimen and the upper and lower pressure plates should be wiped clean.

[0105] 4. The side of the specimen during molding should be used as the bearing surface. The specimen should be placed on the lower pressure plate or pad of the testing machine, and the center of the specimen should be aligned with the center of the lower pressure plate of the testing machine.

[0106] 5. Start the testing machine. The surface of the specimen should be in uniform contact with the upper and lower bearing plates or steel pads.

[0107] 6. The load should be applied continuously and uniformly during the test, with an application rate of 0.8 MPa / s to 1.0 MPa / s.

[0108] 7. Record the failure load when the test block is destroyed.

[0109] 8. Data Processing

[0110] f = F / A; (1)

[0111] f—compressive strength of the specimen (MPa), accurate to 0.1 MPa

[0112] F — Test block failure load (kN)

[0113] A—Bearing area of ​​the test block (m²) 2 )

[0114] Values:

[0115] 1) Take the arithmetic mean of the three test specimens as the strength value of the group of specimens, accurate to 0.1 MPa;

[0116] 2) When the difference between the maximum or minimum value among the three measured values ​​and the median value exceeds 15% of the median value, the maximum and minimum values ​​are discarded and the median value is taken as the compressive strength value of the specimen.

[0117] 3) When the difference between the maximum and minimum values ​​and the median value both exceed 15% of the median value, the test results of that group of specimens are invalid.

[0118] Figure 5 This is a data recording table for compressive strength test according to one embodiment of this application. Figure 6 This is a load versus time curve for testing the compressive strength of a resin concrete block according to an embodiment of this application. During the pressure application process, the testing machine records the applied destructive load, calculates the bearing area based on the input dimensions of the resin concrete block, and finally calculates the compressive strength of the resin concrete block using formula (1).

[0119] The compressive strength of the three resin concrete specimens is shown in Table 1:

[0120] Table 1

[0121]

[0122]

[0123] Experimental results: The compressive strength of Experiment 1, tested using the above method, was 102.10 MPa.

[0124] Experiment 2:

[0125] The method for preparing the machine tool base in this embodiment is as follows:

[0126] 1. Crush, wash, dry, and grade the aggregates, then sieve them. Weigh the aggregates according to the aggregate gradation; the aggregates consist of granite stone and dry sand, totaling 1200g. Among them:

[0127] 108g of dry sand with a particle size of 0.074-0.106mm, accounting for 75% of the total mass of dry sand;

[0128] Dry sand with a particle size of 0.053-0.074 mm, 33.12 g, accounting for 23% of the total mass of dry sand;

[0129] Dry sand with a particle size less than 0.053 mm, 2.88 g, accounting for 2% of the total mass of dry sand;

[0130] Aggregates with a particle size of 0.315-0.625mm, 72g, accounting for 6% of the total aggregate mass;

[0131] Aggregates with a particle size of 0.625mm-1.25mm, 96g, accounting for 8% of the total aggregate mass;

[0132] Aggregates with a particle size of 1.25mm-2.5mm, 144g, accounting for 12% of the total aggregate mass;

[0133] Aggregates with a particle size of 2.5mm-5m, 204g, accounting for 17% of the total aggregate mass;

[0134] Aggregates with a particle size of 5mm-10mm, 300g, accounting for 25% of the total aggregate mass;

[0135] Aggregates with a particle size of 10mm-15mm, 240g, accounting for 20% of the total aggregate mass.

[0136] The subsequent steps are the same as those in Experiment 1, and will not be repeated here.

[0137] The compressive strength of the three resin concrete specimens is shown in Table 2:

[0138] Table 2

[0139]

[0140]

[0141] Experimental results: The compressive strength of Experiment 2 was tested using the above method and found to be 106.51 MPa.

[0142] Experiment 3:

[0143] The method for preparing the machine tool base in this embodiment is as follows:

[0144] 1. Crush, wash, dry, and grade the aggregates, then sieve them. Weigh the aggregates according to the aggregate gradation, and the aggregate proportions are the same as in Experiment 1;

[0145] 2. According to the mixing ratio, weigh out 30.6g of the required steel fiber and add it to each grade of aggregate according to the ratio and mix evenly.

[0146] 3. According to the mixing ratio, weigh out 44.6g of epoxy resin E44, 104g of epoxy resin E51, 37.1g of T31 modified curing agent, 14.5g of isobutanol, and 150g of fly ash.

[0147] 4. Add epoxy resin, curing agent, and diluent (isobutanol) to the mixer in sequence, and stir rapidly for 2 minutes to obtain the binder.

[0148] 5. Add fly ash to the binder and stir slowly for 2 minutes to obtain a mixture.

[0149] 6. Add aggregates of all grades (including dry sand) in order of increasing size to the mixer containing the binder, and mix slowly. Add one type of aggregate and mix for 30 seconds. After all aggregates are added, continue mixing for 5 minutes to obtain resin concrete.

[0150] The subsequent steps are the same as those in Experiment 1, and will not be repeated here.

[0151] The compressive strength of the three resin concrete specimens is shown in Table 3.

[0152] Table 3

[0153]

[0154]

[0155] Experimental results: The compressive strength of Experiment 3 was tested using the above method and found to be 111.09 MPa.

[0156] Experiment 4:

[0157] The method for preparing the machine tool base in this embodiment is as follows:

[0158] 1. Crush, wash, dry, and grade the aggregates, then sieve them. Weigh the aggregates according to the aggregate gradation, and the aggregate proportions are the same as in Experiment 2;

[0159] 2. According to the mixing ratio, weigh out 30.6g of the required steel fiber and add it to each grade of aggregate according to the ratio and mix evenly.

[0160] 3. According to the mixing ratio, weigh out 44.6g of epoxy resin E44, 104g of epoxy resin E51, 37.1g of T31 modified curing agent, 14.5g of isobutanol, and 150g of fly ash.

[0161] 4. Add epoxy resin, curing agent, and diluent (isobutanol) to the mixer in sequence, and stir rapidly for 2 minutes to obtain the binder.

[0162] 5. Add fly ash to the binder and stir slowly for 2 minutes to obtain a mixture.

[0163] 6. Add aggregates of all grades (including dry sand) in order of increasing size to the mixer containing the binder, and mix slowly. Add one type of aggregate and mix for 30 seconds. After all aggregates are added, continue mixing for 5 minutes to obtain resin concrete.

[0164] The subsequent steps are the same as those in Experiment 1, and will not be repeated here.

[0165] The compressive strength of the three resin concrete specimens is shown in Table 4.

[0166] Table 4

[0167]

[0168]

[0169] Experimental results: The compressive strength of Experiment 4 was tested using the above method and found to be 117.53 MPa.

[0170] Experimental Conclusions: Compared with Experiment 1, Experiment 2 optimized the aggregate gradation, increasing the compressive strength of resin concrete by 4.41 MPa, a 4.32% increase. Compared with Experiment 1, Experiment 3, by adding aggregates to the binder in ascending order of particle size, increased the compressive strength of resin concrete by 8.99 MPa, an 8.81% increase. Compared with Experiment 1, Experiment 4 optimized the aggregate gradation and added aggregates to the binder in ascending order of particle size, increasing the compressive strength of resin concrete by 15.43 MPa, a 15.11% increase.

[0171] Furthermore, this application verifies through comparative experiments that coupling treatment of aggregates can improve the compressive strength of resin concrete. Additionally, by preparing a precisely formulated coupling agent solution and immersing the aggregates in the solution, the compressive strength of the resin concrete is further improved. The experimental details are as follows:

[0172] Experiment 5:

[0173] The method for preparing the machine tool base in this embodiment is as follows:

[0174] 1. Crush, wash, dry, and grade the aggregates, then sieve them. Weigh the aggregates according to the aggregate gradation, and the aggregate proportions are the same as in Experiment 2;

[0175] 2. According to the mixing ratio, weigh out 30.6g of the required steel fiber and add it to each grade of aggregate according to the ratio and mix evenly.

[0176] 3. According to the mixing ratio, weigh out 44.6g of epoxy resin E44, 104g of epoxy resin E51, 37.1g of T31 modified curing agent, 14.5g of isobutanol, 150g of fly ash, 40g of water glass with a mass concentration of 5%, and 5g of silane coupling agent.

[0177] 4. Add epoxy resin, curing agent, diluent (isobutanol), water glass and silane coupling agent to the mixer in sequence, and stir rapidly for 2 minutes to obtain the binder.

[0178] 5. Add fly ash to the binder and stir slowly for 2 minutes to obtain a mixture.

[0179] 6. Add aggregates of all grades (including dry sand) in order of increasing size to the mixer containing the binder, and mix slowly. Add one type of aggregate and mix for 30 seconds. After all aggregates are added, continue mixing for 5 minutes to obtain resin concrete.

[0180] The subsequent steps are the same as those in Experiment 1, and will not be repeated here.

[0181] The compressive strength of the three resin concrete specimens is shown in Table 5.

[0182] Table 5

[0183]

[0184] Experimental results: The compressive strength of Experiment 5 was tested using the above method and found to be 135.93 MPa.

[0185] Experiment Six:

[0186] The method for preparing the machine tool base in this embodiment is as follows:

[0187] 1. Crush, wash, dry, and grade the aggregates, then sieve them. Weigh the aggregates according to the aggregate gradation, and the aggregate proportions are the same as in Experiment 2;

[0188] 2. Soak each grade of stone in the aggregate into the coupling agent solution for 15 minutes. Place the coupled aggregate in an oven at 60℃ for 5 hours and then place it in a room temperature drying environment for 30 minutes. The coupling agent solution includes 40g of silane coupling agent, 132g of deionized water, and 180g of anhydrous ethanol. The coupling agent is KH550.

[0189] 3. According to the mixing ratio, weigh out 30.6g of the required steel fiber and add it to each grade of aggregate according to the ratio and mix evenly.

[0190] 4. According to the mixing ratio, weigh out 44.6g of epoxy resin E44, 104g of epoxy resin E51, 37.1g of T31 modified curing agent, 14.5g of isobutanol, and 150g of fly ash.

[0191] 5. Add epoxy resin, curing agent, and diluent (isobutanol) to the mixer in sequence, and stir rapidly for 2 minutes to obtain the binder.

[0192] 6. Add fly ash to the binder and stir slowly for 2 minutes to obtain a mixture.

[0193] 7. Add the aggregates and dry sand of each grade, treated with coupling agent, in ascending order of size to the binder in a mixer and mix slowly. Add one type of aggregate and mix for 30 seconds. After all aggregates are added, continue mixing for 5 minutes to obtain resin concrete.

[0194] The subsequent steps are the same as those in Experiment 1, and will not be repeated here.

[0195] The compressive strength of the three resin concrete specimens is shown in Table 6.

[0196] Table 6

[0197]

[0198] Experimental results: The compressive strength of Experiment 6 was tested using the above method and found to be 150.23 MPa.

[0199] Experimental Conclusions: Compared with Experiment 4, Experiment 4 added a coupling agent to the binder, which increased the compressive strength of the resin concrete by 18.4 MPa, an increase of 15.70%. Compared with Experiment 5, Experiment 6 prepared the coupling agent into a coupling agent solution and immersed the aggregates in the prepared coupling agent solution, which increased the compressive strength of the resin concrete by 14.07 MPa, an increase of 10.35%.

[0200] Finally, this application designed comparative experiments to demonstrate that adding tributyl phosphate to the binder improves the compressive strength of resin concrete. The experimental details are as follows:

[0201] Experiment 7:

[0202] The method for preparing the machine tool base in this embodiment is as follows:

[0203] 1. Crush, wash, dry, and grade the aggregates and sieve them. Weigh the aggregates according to the aggregate gradation, and the aggregate ratio is the same as in Experiment 2.

[0204] 2. Soak each grade of stone in the aggregate into the coupling agent solution for 15 minutes. Place the coupled aggregate in an oven at 60℃ for 5 hours and then place it in a room temperature drying environment for 30 minutes. The coupling agent solution includes 40g of silane coupling agent, 132g of deionized water, and 180g of anhydrous ethanol. The coupling agent is KH550.

[0205] 3. According to the mixing ratio, weigh out 30.6g of the required steel fiber and add it to each grade of aggregate according to the ratio and mix evenly.

[0206] 4. According to the mixing ratio, weigh out 44.6g of epoxy resin E44, 104g of epoxy resin E51, 37.1g of T31 modified curing agent, 11.7g of isobutanol, 2.5g of tributyl phosphate, and 150g of fly ash.

[0207] 5. Add epoxy resin, curing agent, diluent (isobutanol), and defoamer (2.5g tributyl phosphate) to the mixer in sequence, and stir rapidly for 2 minutes to obtain the binder.

[0208] 6. Add fly ash to the binder and stir slowly for 2 minutes to obtain a mixture.

[0209] 7. Add the aggregates and dry sand of each grade, treated with coupling agent, in ascending order of size to the binder in a mixer and mix slowly. Add one type of aggregate and mix for 30 seconds. After all aggregates are added, continue mixing for 5 minutes to obtain resin concrete.

[0210] The subsequent steps are the same as those in Experiment 1, and will not be repeated here.

[0211] The compressive strength of the three resin concrete specimens is shown in Table 7.

[0212] Table 7

[0213]

[0214]

[0215] Experimental results: The compressive strength of Experiment 7 was tested using the above method and found to be 152.63 MPa.

[0216] Experiment 8:

[0217] The method for preparing the machine tool base in this embodiment is as follows:

[0218] 1. Crush, wash, dry, and grade the aggregates, then sieve them. Weigh the aggregates according to the aggregate gradation, and the aggregate proportions are the same as in Experiment 2;

[0219] 2. Soak each grade of stone in the aggregate into the coupling agent solution for 15 minutes. Place the coupled aggregate in an oven at 60℃ for 5 hours and then place it in a room temperature drying environment for 30 minutes. The coupling agent solution includes 40g of silane coupling agent, 132g of deionized water, and 180g of anhydrous ethanol. The coupling agent is KH550.

[0220] 3. According to the mixing ratio, weigh out 30.6g of the required steel fiber and add it to each grade of aggregate according to the ratio and mix evenly.

[0221] 4. According to the mixing ratio, weigh out 44.6g of epoxy resin E44, 104g of epoxy resin E51, 37.1g of T31 modified curing agent, 37g of acetone, and 150g of fly ash.

[0222] 5. Add epoxy resin, curing agent, diluent and (acetone) to the mixer in sequence, and stir rapidly for 2 minutes to obtain the binder.

[0223] 6. Add fly ash to the binder and stir slowly for 2 minutes to obtain a mixture.

[0224] 7. Add the aggregates and dry sand of each grade, treated with coupling agent, in ascending order of size to the binder in a mixer and mix slowly. Add one type of aggregate and mix for 30 seconds. After all aggregates are added, continue mixing for 5 minutes to obtain resin concrete.

[0225] The subsequent steps are the same as those in Experiment 1, and will not be repeated here.

[0226] The compressive strength of the three resin concrete specimens is shown in Table 8.

[0227] Table 8

[0228]

[0229] Experimental results: The compressive strength of Experiment 8 was tested using the above method and found to be 130.96 MPa.

[0230] Experimental Conclusions: Compared with Experiment 6, Experiment 6 added a defoamer (tributyl phosphate) to the binder and optimized the ratio of defoamer (tributyl phosphate) to diluent (isobutanol), which increased the compressive strength of resin concrete by 2.4 MPa, an increase of 1.60%. Compared with Experiment 8, Experiment 7 replaced the traditional acetone with isobutanol as the defoamer, which reduced the cost of defoamer use and increased the compressive strength of resin concrete by 21.67 MPa, an increase of 16.55%.

[0231] Comparing Experiment 6 and Experiment 8, the strength improved after the diluent was changed from acetone to isobutanol, and the amount of isobutanol used was also less than that of acetone. Research shows that isobutanol costs 12.9 yuan / kg, and acetone costs 8.8 yuan / kg. Therefore, the diluent cost for preparing the resin concrete test blocks is:

[0232] Acetone: 0.037 × 8.8 = 0.3256 yuan;

[0233] Isobutanol: 0.0145 × 12.9 = 0.18705 yuan;

[0234] Cost reduction: (0.3256-0.18705) / 0.3256×100%=42.55%.

[0235] As can be seen from the above, changing the diluent from acetone to isobutanol reduced the cost of the diluent by 42.55%.

[0236] Experimental Results Analysis

[0237] Figure 7 This is a line graph showing the compressive strength according to one embodiment of this application. As shown in Title 7, this application improves the compressive strength of resin concrete from an initial 102.1 MPa to an optimal 152.63 MPa by optimizing aggregate gradation, preparation methods (adding aggregates sequentially according to particle size and coupling treatment of the aggregates), and improving the binder formulation and raw materials. This represents an increase in compressive strength of 49.49%. Using the solution of this application, the compressive strength of the machine tool base is significantly improved, its service life is extended, and manufacturing costs are reduced.

[0238] The above embodiments are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art can make various changes and modifications without departing from the scope of this application. Therefore, all equivalent technical solutions should also fall within the scope of this application.

Claims

1. A machine tool base, characterized in that, include: The base shell and resin concrete, wherein the resin concrete is filled into the base shell, and the resin concrete comprises the following raw materials by mass percentage: 70%-85% aggregate, 5%-15% filler, and 5%-20% binder, wherein the aggregate includes dry sand and stone, the dry sand accounting for 10%-20% of the total aggregate mass, and the stone accounting for 80%-90% of the total aggregate mass, the stone comprising at least three grades of stone according to particle size, and the dry sand comprising: Dry sand with a particle size of 0.074-0.106mm: accounting for 72%-78% of the total mass of dry sand; Dry sand with a particle size of 0.053-0.074mm: accounting for 20%-25% of the total mass of dry sand; Dry sand with a particle size of less than 0.053 mm: accounting for 1%-3% of the total mass of dry sand; The binder comprises the following raw materials in weight percentages: resin: 65%-80%, curing agent: 15-25%, diluent: 1-10%, and defoamer: 1-10%, wherein the diluent includes isobutanol; the resin concrete raw material further comprises: fiber, with a weight percentage of 0.5-3%; the method for preparing the machine tool base includes: Weigh the aggregates, fillers, fibers, resins, curing agents, diluents, and defoamers according to the mixing ratio; The resin, curing agent, diluent, and defoamer are added sequentially to a mixing device and stirred to obtain a binder. Add filler to binder and stir to obtain binder mixture; The fibers were added to each grade of aggregate and stirred evenly to obtain aggregate mixtures of each grade. Resin concrete is obtained by adding aggregate mixtures of various grades in order of increasing particle size to binder mixture, wherein each grade of aggregate is added and mixed for a predetermined time. The resin concrete is poured into the base shell, vibrated to compact it, and then cured to obtain the machine tool base.

2. The machine tool base according to claim 1, characterized in that, The hardness of the stone is 220 MPa-260 MPa, and the stone comprises: Stone with a particle size of 0.315-1.25mm accounts for 12%-19% of the total stone mass; Stones with a particle size of 1.25mm-5mm account for 28%-36% of the total stone mass; Stones with a particle size of 5mm-15mm account for 46%-54% of the total stone mass.

3. The machine tool base according to claim 1, characterized in that, The hardness of the stone is 220 MPa-260 MPa, and the stone comprises: Stone with a particle size of 0.315-0.625mm accounts for 5%-8% of the total stone mass; Stone with a particle size of 0.625mm-1.25mm accounts for 7%-11% of the total stone mass; Stone with a particle size of 1.25mm-2.5mm accounts for 11%-15% of the total stone mass; Stone with a particle size of 2.5mm-5mm accounts for 17%-21% of the total stone mass; Stone with a particle size of 5mm-10mm accounts for 26%-30% of the total stone mass; Stones with a particle size of 10mm-15mm account for 20%-24% of the total stone mass.

4. The machine tool base according to claim 1, characterized in that, The fiber includes: copper-plated steel fiber with a diameter of 0.2mm-0.5mm and an aspect ratio of 60-80.

5. The machine tool base according to claim 1, characterized in that, The filler includes one or more of fly ash, quartz powder, and pozzolanic material.

6. The machine tool base according to claim 1, characterized in that, The resins include bisphenol A type epoxy resin E44 and bisphenol A type epoxy resin E51, and the mass ratio of bisphenol A type epoxy resin E44 to bisphenol A type epoxy resin E51 is 1:2-5.

7. The machine tool base according to claim 1, characterized in that, The curing agent includes T31 modified curing agent, and the defoamer is tributyl phosphate.

8. The machine tool base according to claim 1, characterized in that, The resin concrete is poured into the base shell, vibrated to compact, and cured to obtain the machine tool base, which includes: The resin concrete was poured into the base shell; The cast base shell is placed on a vibration table and vibrated to compact it. The base shell filled with resin concrete is cured in a constant temperature environment of 80℃-90℃ for 3-8 days, and then cured at room temperature for 1-3 days to obtain the machine tool base.

9. The machine tool base according to claim 8, characterized in that, The vibration table has a vibration time of 10-20 minutes, a vibration frequency of 40 Hz-50 Hz, and an amplitude of 0.2 mm-0.4 mm.

10. The machine tool base according to claim 1, characterized in that, The stirring time is 20s-60s.

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