Fixed guide rail plate of composite hydrostatic guide rail

Abstract

The utility model discloses a combined type static pressure guide rail fixed guide rail plate which is composed of segmented fixed guide rail plates and a floating plate, the segmented fixed guide rail plates are used for solving the problem of fixed guide rail machining, gaps needed by thermal expansion of all fixed guide rail plates can be reserved between all the fixed guide rail plates, and therefore large static pressure guide rails and guide rail plates can be machined easily. When natural stone with excellent thermal stability is used as a lathe bed, the fixed guide rail plate can be made of materials which are easy to machine and high in strength, meanwhile, strip steel or strip-shaped materials can be used as a floating fixed guide rail panel to serve as an isolating layer of an oil film, and low-cost and high-thermal-stability manufacturing of the static pressure guide rail can be achieved.

Description

Technical Field

[0001] The utility model relates to a static pressure guide rail fixed guide rail plate, in particular to a composite static pressure guide rail fixed guide rail plate. Background Art

[0002] Hydrostatic guide rails are commonly used in precision machine tools. In hydrostatic guide rails with longer strokes, the processing of fixed guide rail plates is the most difficult process. In addition, the bed and the fixed guide rail plates have different thermal expansion in different temperature environments, which will produce thermal stress. Especially when the bed material is natural stone with a very low thermal expansion coefficient and a very low thermal conductivity coefficient, it cannot be matched with the metal fixed guide rail plate. The fixed guide rail plate can only be made of the same material. Natural stone is brittle and is easy to break during the production, assembly and use of a long fixed guide rail plate with a small cross-sectional area. When natural stone absorbs hydrostatic oil, the material will undergo qualitative changes, affecting its lifespan, making it difficult for natural stone with excellent thermal stability to be used as a hydrostatic guide bed. For example, the disadvantages of CN116922107A are poor vibration resistance and cannot be used in the vertical direction, and the disadvantages of CN101829904A are that both the bed and the guide rail plate are made of granite. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a fixed guide rail plate which is fixed on the fixed guide rail base in sections, and a floating fixed guide rail panel is provided at the position of the oil cavity between the outer side of the fixed guide rail plate and the movable guide rail over the entire length of the fixed guide rail.

[0004] The utility model is realized by the following technical scheme: there is a gap between each section of the fixed guide rail, the gap value is greater than the maximum thermal deformation difference of the fixed guide rail plate and the fixed guide rail base on the length of the section of the fixed guide rail.

[0005] The utility model is realized through the following technical scheme: a floating pressing device is arranged between the floating fixed guide rail panel and the fixed guide rails at both ends.

[0006] The beneficial effects of the utility model are as follows: a composite hydrostatic guideway fixed guideway plate, which is composed of a segmented fixed guideway plate and a floating plate. The segmented fixed guideway plate is used to solve the problem of fixed guideway processing, and a gap required for thermal expansion of each segment of the fixed guideway plate can be left between the segments of the fixed guideway plate, making it easy to process large hydrostatic guideways and guideway plates. When natural stone with excellent thermal stability is used as the bed, the fixed guideway plate can use a material that is easy to process and has high strength. At the same time, strip steel or strip material can be used as a floating fixed guideway panel as an isolation layer for the oil film, so that low-cost and high-thermal-stability manufacturing of the hydrostatic guideway can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0008] Figure 1 It is a schematic diagram of a cross section perpendicular to the moving direction of the hydrostatic guide rail of the utility model;

[0009] Figure 2 It is a schematic diagram of the segmented fixed guide rail and the upper and lower fixed guide rail panels of the utility model;

[0010] Figure 3 It is a schematic diagram of the heat-tolerant deformation gap between the segmented fixed guide rail plates of the utility model;

[0011] Figure 4 This is a schematic diagram of the floating assembly of the fixed guide rail panel of the utility model; Description of the drawings:

[0013] 1. Fixed guide rail seat; 2. Fixed guide rail plate; 201. Gap between fixed guide rail plates; 3. Fixed guide rail floating panel; 4. Oil film; 5. Moving guide rail; 6. Screws; 7. Elastic element. DETAILED DESCRIPTION

[0014] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0015] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0016] Example 1

[0017] like Figure 1-Figure 4 As shown, a fixed guide plate 2 is installed on a fixed guide seat 1, a floating fixed guide panel is provided on the fixed guide plate 2, a movable guide 5 is provided outside, and six groups of oil chambers are provided on the movable guide 5, and the oil chambers correspond to the fixed guide panel. The fixed guide seat 1 is made of natural granite material, and the fixed guide plate 2 is manufactured and installed in sections, and the material is cast iron material. The thermal expansion coefficient of natural granite is 0.3*10 -5 / K, the thermal expansion coefficient of cast iron is 1*10 -5 / K, there is a thermal deformation gap between each section of the fixed guide rail plate, the assembly temperature is 20℃, the maximum temperature difference is set to 50℃, the length of the fixed guide rail plate is 200mm, 200*50℃*10=0.1mm, set δ=0.15mm, the width of the floating guide rail panel is greater than the width of the oil cavity, the thickness is 0.5mm, the material is 65mm steel belt, the floating guide rail panel has a gap at both ends. Figure 4 The floating pressing device shown is pressed on the fixed guide rail panels at both ends, and the screws 6 are installed on the fixed guide rail floating panel 3 through the elastic element 7 and elastically pressed on the fixed guide rail plate 2. The value of the hole diameter on the fixed guide rail floating panel 3 minus the diameter of the screw 6 is greater than the thermal expansion and contraction difference between the fixed guide rail floating panel 3 and the fixed guide rail seat 1. When working, the floating fixed guide rail panel is pressed against the fixed guide rail plate by the pressure oil in the oil chamber.

[0018] Example 2

[0019] Different from Example 1, the fixed guide rail seat is a casting, and the fixed guide rail plate 2 is a casting with a total length of 10 meters. Because the guide rail plate is too long to be processed, the length of the cast iron fixed guide rail plate is 500mm, and the gap between adjacent fixed guide rail plates is 0.1mm. The fixed guide rail floating panel is 65mm of the total length of the guide rail, and has a 0.5mm steel strip.

[0020] The utility model is composed of a segmented fixed guide rail plate and a floating plate. The segmented fixed guide rail plate is used to solve the problem of fixed guide rail processing, and a gap required for thermal expansion of each segment of the fixed guide rail plate can be left between each segment of the fixed guide rail plate, so that the processing of large-scale hydrostatic guide rails and guide rail plates becomes easy. When natural stone with excellent thermal stability is used as the bed, the fixed guide rail plate can use a material that is easy to process and has high strength. At the same time, strip steel or strip material can be used as a floating fixed guide rail panel as an isolation layer of the oil film, which can realize low-cost and high thermal stability manufacturing of the hydrostatic guide rail.

[0021] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope defined in the claims.

Claims

1. A composite static pressure guide rail fixed guide rail plate, characterized in that: The fixed guide rail plate is fixed on the fixed guide rail base in sections, and the position of the oil cavity between the outer side of the fixed guide rail plate and the movable guide rail is provided with a floating fixed guide rail panel over the entire length of the fixed guide rail; There is a gap between each section of the fixed guide rail, and the gap value is greater than the maximum thermal deformation difference between the fixed guide rail plate and the fixed guide rail base over the length of the section of the fixed guide rail; There is a floating compression device between the floating fixed guide rail panel and the fixed guide rails at both ends.

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