Composite material rotary table

Abstract

The utility model discloses a composite material rotary table which comprises a swing shaft unit, a rotary shaft unit and a working rotary table, a swing shaft rocker arm of the swing shaft unit, a rotary shaft rocker arm of the rotary shaft unit and the working rotary table are all formed by casting mineral cementing materials, metal inserts are arranged in the swing shaft unit, the rotary shaft rocker arm of the rotary shaft unit and the working rotary table in advance, and the metal inserts provide interfaces for installing other parts. The metal insert positioned on the working turntable comprises a working turntable mounting insert and a workpiece mounting insert; the working turntable mounting insert is used for being connected with a rotating mechanism of the rotating shaft unit, and the workpiece mounting insert is used for mounting a machining workpiece or a tool clamp; the workpiece mounting insert comprises a base disc and a plurality of rod pieces, and the rod pieces are evenly arranged on the periphery of the base disc in a radial mode and extend to the periphery of the working rotary table. According to the utility model, the temperature rise of each part of the rotary table cast by adopting the mineral cementing material is small under the influence of external heat radiation, so that the shape precision of the rotary table is ensured. And the heat transfer is reduced through the combination of the radial workpiece mounting inserts and the mineral cementing material. Therefore, the rotary table can keep stable geometric precision, motion precision, positioning precision and repeated positioning precision.

Description

TECHNICAL FIELD

[0001] The utility model relates to machine tool mechanical equipment technical field especially relates to a composite material rotary table. BACKGROUND

[0002] The heat that can influence machine tool temperature is divided into internal heat and external heat, wherein the internal heat is mainly derived from the heat generated by machine tool itself, such as the heat generated by spindle motor long time work;The external heat is mainly derived from the heat transfer or heat radiation of outside to machine tool and causes the heat, such as the cutting heat generated by cutting workpiece, the heat is always radiated from tool tip point to machining area, the movement track of tool tip point in machining area is uncertain, the temperature change influenced by tool tip point heat source is uncertain, due to the continuous change of tool tip point position and tool tip point radiated heat, cause the uneven temperature distribution in machining area, the heat radiation direction is irregular, the heat diffusion is uneven, make the uneven temperature field on the machine tool component in machining area.

[0003] Although the cutting fluid can take away most of the cutting heat, but the heat carried by the cutting fluid still has a part to transfer to other components of machine tool, due to the existence of uneven temperature field, the heat radiation direction is irregular, the heat diffusion is uneven, the components of machine tool occur different degree of thermal deformation, thereby destroy the original geometric precision of machine tool, cause the machining error.

[0004] Rotary table as important structural component in machine tool structure to realize five-axis machining, the requirement of precision is higher, gray cast iron high strength, application time is long, technology is mature, often used in the manufacture of machine tool rotary table. The thermal expansion coefficient of gray cast iron HT150 is 11.1×10 -8 / ℃, the thermal conductivity is 45w / (m.K), when the temperature of machine tool is higher, exceeds the specified temperature of gray cast iron cast rotary table structure, produces following two problems: on the one hand, the structure of rotary table will produce deformation due to thermal expansion, thereby destroy the machining precision of machine tool, influence the machining quality of workpiece;On the other hand, will make the cooperation gap between different relative motion rotary table structure change, influence the motion precision of rotary table, even interfere with the normal work of machine tool.

[0005] The rotary table cast by gray cast iron is easy to be influenced by internal heat and external heat, leading to overheating, overheating makes the temperature of rotary table rise due to heat, and produces deformation due to thermal expansion, makes the relative position relationship between the rotation center line of rotary table internal rotating shaft and other components of machine tool change, causes the rotary table to lose the existing precision, and further influence the machining quality of machined parts.

[0006] The rotating platform is always affected by internal heat and external heat during working process, and the heat radiation generated by the internal heat source and the external heat source is nonlinear and irregular, the heat generated by the internal heat source and the external heat source is transmitted to each component of the rotating platform through the platform, so the traditional gray cast iron rotating platform is easy to produce temperature change due to heat, and then produce deformation, and it is difficult to ensure stable geometric precision in a long working process. Practical new type content

[0007] The utility model provides a kind of composite material rotating platform to solve above-mentioned technical problem.

[0008] To achieve the above object, the technical scheme of the utility model is:

[0009] A kind of composite material rotating platform, including: swing shaft unit, rotating shaft unit and work rotating platform, swing shaft unit includes swing shaft rocker, rotating shaft unit includes rotating shaft rocker, swing shaft rocker, rotating shaft rocker and work rotating platform are all casted using mineral cementing material;Swing shaft rocker, rotating shaft rocker and the inner part of work rotating platform are respectively provided with metal insert, metal insert provides interface for installing other components;Metal insert located at work rotating platform includes work rotating platform installation insert and workpiece installation insert;Work rotating platform installation insert is used to connect the rotating mechanism of rotating shaft unit, and workpiece installation insert is used to install machining workpiece or tooling fixture;Workpiece installation insert includes base disc and several rod pieces, and several rod pieces are evenly arranged radially on the outer periphery of base disc and extend to the outer periphery of work rotating platform.

[0010] Preferably, T-shaped grooves are formed on the base disc and the several rod pieces for installing machining workpiece or tooling fixture.

[0011] Preferably, T-shaped grooves are formed on each rod piece, and the T-shaped grooves extend from the end of the rod piece to the base disc, and the lengths of the T-shaped grooves on adjacent rod pieces are alternately arranged.

[0012] Preferably, the rotation axis of the swing shaft unit and the rotation axis of the rotating shaft unit are non-orthogonal.

[0013] Preferably, the angle between the rotation axis of the swing shaft unit and the rotation axis of the rotating shaft unit is 45°.

[0014] Preferably, the mineral cementing material is selected from cast stone or foamed cement.

[0015] Preferably, a connecting part embedded in the mineral cementing material is fixed on the metal insert.

[0016] Preferably, the metal insert located at the swing shaft rocker includes swing shaft rocker installation insert and swing shaft installation insert;The swing shaft rocker installation insert is used to install the swing shaft rocker, and the swing shaft installation insert is used to install the rotating mechanism of the swing shaft unit on the swing shaft rocker. Preferably, the metal insert located at the swing shaft rocker includes swing shaft rocker installation insert and swing shaft installation insert;The swing shaft rocker installation insert is used to install the swing shaft rocker, and the swing shaft installation insert is used to install the rotating mechanism of the swing shaft unit on the swing shaft rocker.

[0017] Preferably, the metal inserts located on the swing shaft rocker arm include a swing shaft rocker arm mounting insert and a swing shaft mounting insert; the swing shaft rocker arm mounting insert is used for connecting the rotating mechanism of the swing shaft unit, and the swing shaft mounting insert is used for mounting the rotating mechanism of the swing shaft unit on the swing shaft rocker arm.

[0018] Preferably, the swing shaft rocker arm, the swing shaft rocker arm and the work turntable are internally provided with cooling pipelines.

[0019] Advantages:

[0020] The composite material turntable disclosed in the application pours the swing shaft rocker arm, the swing shaft rocker arm and the work turntable by using mineral cementing material. The thermal conductivity of the mineral cementing material under the condition of being heated is only 1 / 20 of that of gray cast iron. The temperature rise of each part of the turntable poured by using the mineral cementing material and affected by external heat radiation is small in unit time, so that the deformation amount of each part of the turntable is small, thereby ensuring the shape precision of the turntable. Through the radiating workpiece mounting inserts, on the basis of realizing the installation of the workpiece or the tooling fixture, the heat is transmitted to the work turntable through the workpiece mounting inserts, so that the temperature of the work turntable uniformly changes, and then the characteristics of the mineral cementing material are used to reduce the heat transmission to the swing shaft unit and the swing shaft unit. Therefore, the influence of the heat source on the temperature of the turntable is reduced in combination, the thermal deformation of each part of the turntable during the working process is reduced, so that the turntable can maintain stable geometric precision, motion precision, positioning precision and repeat positioning precision in a long working process. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0022] Figure 1 The structural schematic diagram of the composite material turntable disclosed in the present application is shown in the figure.

[0023] Figure 2 The structural schematic diagram of the swing shaft unit of the composite material turntable disclosed in the present application is shown in the figure.

[0024] Figure 3 The structural schematic diagram of the swing shaft unit of the composite material turntable disclosed in the present application is shown in the figure.

[0025] Figure 4 The structural schematic diagram of the work turntable of the composite material turntable disclosed in the present application is shown in the figure.

[0026] 11, swing shaft rocker; 21, rotary shaft rocker; 3, work turntable; 41, swing shaft rocker mounting insert; 42, swing shaft mounting insert; 43, rotary shaft rocker mounting insert; 44, rotary shaft mounting insert; 45, work turntable mounting insert; 46, workpiece mounting insert; 461, base disc; 462, rod piece; 5, cooling pipeline. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] A composite material turntable, combining Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the swing shaft unit, the rotation shaft unit and the working turntable 3, the swing shaft unit includes swing shaft rocker arm 11, the rotation shaft unit includes rotation shaft rocker arm 21, swing shaft rocker arm 11, rotation shaft rocker arm 21 and working turntable 3 are casted by mineral cementing material; by using mineral cementing material to cast swing shaft rocker arm 11, rotation shaft rocker arm 21 and working turntable 3, the thermal conductivity of mineral cementing material under the condition of heating is only 1 / 20 of gray cast iron, the temperature rise of swing shaft rocker arm 11, rotation shaft rocker arm 21 and working turntable 3 casted by mineral cementing material is small under the influence of external heat radiation in unit time, so that the deformation of swing shaft rocker arm 11, rotation shaft rocker arm 21 and working turntable 3 is small, thereby ensuring the shape accuracy of swing shaft rocker arm 11, rotation shaft rocker arm 21 and working turntable 3. The inner part of swing shaft rocker arm 11, rotation shaft rocker arm 21 and working turntable 3 is respectively provided with a metal insert, which provides an interface for installing other components; the compressive strength and tensile strength of mineral cementing material are not as good as gray cast iron, and the metal insert can make up for the deficiency of mineral cementing material in strength and ensure the overall stiffness of the casting; and the metal insert is easy to finish, which can ensure the connection strength and installation accuracy between the components of the turntable and between the turntable and the machine tool. The metal insert located in the working turntable 3 includes a working turntable mounting insert 45 and a workpiece mounting insert 46; the working turntable mounting insert 45 is used to connect the rotation mechanism of the rotation shaft unit, and the workpiece mounting insert 46 is used to install the workpiece or tooling fixture; the workpiece mounting insert 46 includes a base disc 461 and a plurality of rod members 462, and the plurality of rod members 462 are uniformly arranged in a radial manner on the outer periphery of the base disc 461 and extend to the outer periphery of the working turntable 3. Through the radial workpiece mounting insert 46, on the basis of realizing the installation of the workpiece or tooling fixture, the heat transferred to the working turntable 3 through the workpiece mounting insert 46 can make the temperature of the working turntable 3 change uniformly, and then the characteristics of mineral cementing material are used to reduce the heat transfer to the swing shaft unit and the rotation shaft unit. In summary, it reduces the influence of heat source on the temperature of the turntable, reduces the thermal deformation of each component during the working process of the turntable, ensures the matching accuracy of each component, and makes the turntable maintain stable geometric accuracy, motion accuracy, positioning accuracy and repeat positioning accuracy during a long working process.

[0029] During the working process of the turntable, the turntable cooperates with the main shaft to process, and the swing shaft rocker arm 11, the rotation shaft rocker arm 21 and the working turntable 3 are prone to vibration during movement, which causes synchronous vibration of each moving part and its connecting parts, reduces the motion accuracy and position accuracy of each moving part, and further affects the processing accuracy. The present application utilizes the characteristics of mineral cementing material having good damping performance to realize absorbing the vibration of each moving part and its connecting parts, reduce the vibration amplitude, and keep the relative position between the relative moving parts stable, so that the matching gap between the relative moving parts is not easy to change, thereby ensuring the motion accuracy, positioning accuracy and repeat positioning accuracy of the machine tool.

[0030] Preferably, T-shaped grooves are formed on the base plate 461 and the plurality of rods 462 for mounting the workpiece or the tooling fixture, so as to facilitate the mounting of workpieces or tooling fixtures of different sizes and types.

[0031] Preferably, T-shaped grooves are formed on each rod 462, and the T-shaped grooves on adjacent rods 462 are alternately long and short. That is, one end of a rod 462 is located on the outer circumferential surface of the work rotary table 3, and the other end extends to a position close to the center hole of the base plate 461; one end of the rod 462 adjacent to the rod 462 is located on the outer circumferential surface of the work rotary table 3, and the other end extends to a position close to the outer circumferential surface of the base plate 461 inside the base plate 461; which ensures that the workpiece or the tooling fixture can be fixed at the center position of the base plate 461, and also ensures the strength and rigidity of the center position of the base plate 461.

[0032] Preferably, the rotation axis of the swing shaft unit and the rotation axis of the rotary shaft unit are non-orthogonal, which can effectively reduce the rotational inertia of the rotary table rotation axis.

[0033] Preferably, the angle between the rotation axis of the swing shaft unit and the rotation axis of the rotary shaft unit is 45°, which makes the rotary table have better rigidity, larger rotation angle, smaller interference and smaller rotational inertia.

[0034] Preferably, the mineral cement material is selected from cast stone or foamed cement material. Compared with traditional cast iron materials, the thermal conductivity of cast stone is only 1 / 20 of that of cast iron, and it is not sensitive to short-term environmental temperature changes. In the same unit of time, under the influence of the same heat, the deformation of the structure caused by temperature is smaller than that of cast iron materials, which ensures the accuracy of the structure. Compared with traditional cast iron materials, the damping characteristic value of cast stone is 6-10 times that of cast iron, and the mineral cement material of cast stone material can reduce the influence of vibration, so that the relative position between the moving parts of the rotary table and the machine tool is kept stable, and the rotary table can maintain stable high precision during work. Foamed cement has small thermal conductivity and is not sensitive to short-term environmental temperature changes. The porous structure of foamed cement itself has good vibration absorption capacity, which reduces the influence of vibration on the relative position accuracy and geometric accuracy between the moving parts of the rotary table and the machine tool.

[0035] Specifically, the performance comparison of gray cast iron, cast stone and foamed cement materials can refer to the relevant contents in the patent with the name of "Vertical Machining Center" and the authorization publication number CN219005241U.

[0036] Specifically, the metal inserts are preferably high-strength steel inserts, which can ensure rigidity and utilize the similar thermal expansion coefficients of the two. The metal inserts are symmetrically and uniformly distributed inside the corresponding parts, and the heat of the mineral cement material can be conducted to the steel inserts. Under the action of multiple symmetrically distributed steel inserts, a uniform temperature field is generated on the parts, and the temperature fields of the parts are similar, so that the thermal radiation of the parts has linearity and regularity.

[0037] Preferably, the metal inserts are fixed with connecting parts embedded in the mineral cement material, which increase the contact area and connection strength with the swing shaft rocker arm 11, the rotary shaft rocker arm 21, the work turntable 3, etc., and further ensure that the metal inserts can be stably fixed with the swing shaft rocker arm 11, the rotary shaft rocker arm 21, the work turntable 3, etc.

[0038] Specifically, the connecting part includes a horizontal rod and at least one vertical rod, one end of the vertical rod is fixedly connected with the metal insert, the other end is fixedly connected with the horizontal rod, and the axis of the horizontal rod is perpendicular to the axis of the vertical rod, which limits the displacement of the metal insert in the vertical direction and the horizontal direction.

[0039] Preferably, the metal inserts located in the swing shaft rocker arm 11 include a swing shaft rocker arm mounting insert 41 and a swing shaft mounting insert 42; the swing shaft rocker arm mounting insert 41 is used for mounting the swing shaft rocker arm 11, and the swing shaft mounting insert 42 is used for mounting the rotating mechanism of the swing shaft unit on the swing shaft rocker arm 11.

[0040] Specifically, the swing shaft rocker arm mounting insert 41 is embedded in the bottom of the swing shaft rocker arm 11, the swing shaft rocker arm mounting surface of the swing shaft rocker arm mounting insert 41 protrudes from the bottom of the swing shaft rocker arm 11, and the swing shaft rocker arm mounting insert 41 can be individually finished. The swing shaft rocker arm mounting insert 41 includes a sliding block mounting insert for mounting a sliding block and a nut mounting insert for mounting a nut.

[0041] The swing shaft mounting insert 42 is embedded in the swing shaft rocker arm 11, the end face and the inner hole of the swing shaft mounting insert 42 face the rotating mechanism mounting surface of the inclined swing shaft unit of the swing shaft rocker arm 11 and expose the rotating mechanism mounting surface, and the end face and the inner hole of the swing shaft mounting insert 42 can be individually finished.

[0042] Preferably, the metal inserts located in the rotary shaft rocker arm 21 include a rotary shaft rocker arm mounting insert 43 and a rotary shaft mounting insert 44; the rotary shaft rocker arm mounting insert 43 is used for connecting the rotating mechanism of the swing shaft unit, and the rotary shaft mounting insert 44 is used for mounting the rotating mechanism of the rotary shaft unit on the rotary shaft rocker arm 21.

[0043] Specifically, the swing shaft rocker arm mounting insert 43 is embedded in the swing shaft rocker arm 21, the end face of the swing shaft rocker arm mounting insert 43 protrudes from the inclined swing shaft rocker arm mounting surface of the swing shaft rocker arm 21, and the end face and the inner hole of the swing shaft rocker arm mounting insert 43 are ensured to be separately finished. The swing shaft rocker arm mounting insert 43 cooperates with the swing shaft mounting insert 42 to mount the rotating mechanism of the swing shaft unit, so that the rotating mechanism drives the swing shaft rocker arm 21 to rotate. The swing shaft mounting insert 44 is embedded in the swing shaft rocker arm 21, the end face of the swing shaft mounting insert 44 protrudes from the top surface of the swing shaft rocker arm 21, and the end face and the inner hole of the swing shaft mounting insert 44 are ensured to be separately finished, for mounting the rotating mechanism of the swing shaft unit.

[0044] Specifically, the work rotary table mounting insert 45 is embedded in the center of the work rotary table 3, the two end faces of the work rotary table mounting insert 45 protrude from the upper and lower surfaces of the work rotary table 3, and the two end faces and the inner hole of the work rotary table mounting insert 45 are ensured to be separately finished, for connecting and mounting the rotating mechanism of the swing shaft unit, so that the rotating mechanism drives the work rotary table 3 to rotate. The workpiece mounting insert 46 is embedded in the upper surface of the work rotary table 3, and the workpiece mounting insert 46 protrudes from the upper surface of the work rotary table 3, and the workpiece mounting insert 46 is ensured to be separately finished, for mounting the workpiece or the tooling fixture.

[0045] Specifically, the work rotary table mounting insert 45 is connected with the workpiece mounting insert 46 by screws.

[0046] Preferably, the swing shaft rocker arm 11, the swing shaft rocker arm 21 and the work rotary table 3 are all provided with cooling pipelines 5. The cooling pipelines 5 are supplied with cooling medium to keep constant temperature, further eliminating the influence of temperature, reducing the deformation as much as possible by keeping constant temperature, and ensuring the geometric accuracy of the rotary table.

[0047] Specifically, the cooling pipelines 5 are embedded into the swing shaft rocker arm 11, the swing shaft rocker arm 21 and the work rotary table 3, the shape of the cooling pipelines 5 is adapted to the structure of the corresponding swing shaft rocker arm 11, swing shaft rocker arm 21 and work rotary table 3, and the layout of the cooling pipelines 5 avoids the metal inserts in the swing shaft rocker arm 11, the swing shaft rocker arm 21 and the work rotary table 3. The cooling pipelines 5 realize heat dissipation inside the rotary table, keep the temperature inside the rotary table constant, reduce the influence of internal heat on the components and metal inserts of the rotary table, so that the rotary table is not easy to deform under the influence of internal heat, thereby maintaining stable high precision in a long working process.

[0048] It should be finally pointed out that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A composite material turntable, characterized by, The utility model relates to a swing shaft unit, a rotary shaft unit and a work rotary table (3), the swing shaft unit includes swing shaft rocker arm (11), the rotary shaft unit includes rotary shaft rocker arm (21), swing shaft rocker arm (11), rotary shaft rocker arm (21) and work rotary table (3) are all casted with mineral cementing material, the inside of swing shaft rocker arm (11), rotary shaft rocker arm (21) and work rotary table (3) is respectively prearranged with metal insert, and the metal insert is the interface for installing other components, the metal insert located the work rotary table (3) includes work rotary table installation insert (45) and work piece installation insert (46), work rotary table installation insert (45) is used to connect the rotating mechanism of rotary shaft unit, and work piece installation insert (46) is used to install processing work piece or tooling fixture, work piece installation insert (46) includes base disc (461) and a plurality of rod (462), a plurality of rod (462) is evenly arranged in the outer periphery of base disc (461) and extends to the outer periphery of work rotary table (3) radially. T-shaped grooves are formed on the base disc (461) and the plurality of rods (462) for mounting the processing work piece or the tooling fixture.

2. A composite table as claimed in claim 1, wherein Each of the rods (462) is provided with the T-shaped groove, the T-shaped groove extends from the end of the rod (462) to the base disc (461), and the T-shaped grooves on adjacent rods (462) are alternately arranged in length.

3. A composite table as claimed in claim 2, wherein, The rotation axis of the swing shaft unit and the rotation axis of the rotary shaft unit are non-orthogonal.

4. The composite table of claim 1, wherein, The angle between the rotation axis of the swing shaft unit and the rotation axis of the rotary shaft unit is 45°.

5. A composite table as claimed in claim 4, wherein, The mineral cementing material is selected from cast stone or foamed cement.

6. A composite table as claimed in claim 1, wherein, A connecting part embedded in the mineral cementing material is fixed on the metal insert.

7. The composite table of claim 1, wherein, The metal insert located on the swing shaft rocker arm (11) includes a swing shaft rocker arm installation insert (41) and a swing shaft installation insert (42), the swing shaft rocker arm installation insert (41) is used for installing the swing shaft rocker arm (11), and the swing shaft installation insert (42) is used for installing the rotating mechanism of the swing shaft unit on the swing shaft rocker arm (11).

8. A composite table as claimed in claim 7, wherein, The metal insert located on the rotary shaft rocker arm (21) includes a rotary shaft rocker arm installation insert (43) and a rotary shaft installation insert (44), the rotary shaft rocker arm installation insert (43) is used for connecting the rotating mechanism of the swing shaft unit, and the rotary shaft installation insert (44) is used for installing the rotating mechanism of the rotary shaft unit on the rotary shaft rocker arm (21).

9. A composite table as claimed in claim 7, wherein, The swing shaft rocker arm (11), the rotary shaft rocker arm (21) and the work rotary table (3) are all provided with cooling pipelines (5).

10. The composite table of claim 1, wherein, ​

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