CN201037803Y - Rolling linear guide pair static stiffness test platform - Google Patents

Abstract

The utility model discloses a rolling linear guide rail auxiliary static stiffness experiment platform belonging to the technical field of machinery manufacturing. The slide block is installed, the slide seat is installed on the slide block, the dial indicator is fixed on the base, and the loading bolt is installed on the force sensor. The platform can be used to measure the static stiffness of the rolling linear guide pair. The loading bolt is used to apply a load to the sliding seat. The magnitude of the load can be read through the digital display device connected to the force sensor, and the deformation displacement of the sliding seat can be read through the dial indicator, thus obtaining the static stiffness of the linear guide pair. This platform has laid the foundation for analyzing the static stiffness of the whole machine tool, helping designers to understand and improve the static stiffness of the whole machine in the design stage, saving the development cost of the machine tool, and enhancing the competitiveness of the enterprise. Moreover, the platform is easy to build and has a strong adaptability.

Description

Rolling linear guide pair static stiffness test platform

technical field

The utility model belongs to the technical field of mechanical manufacturing, and relates to an experimental platform for the static stiffness of rolling linear guide rail pairs.

Background technique

As a modern CNC machining equipment, the working performance of CNC machine tools is an important factor to determine whether it can have market competitiveness, and static stiffness is an important technical index. The static stiffness of a machine tool refers to the ability of the machine tool to withstand a constant load. Static deformation will not only change the geometric accuracy of the parts and affect the processing quality, but also affect the vibration resistance, productivity, noise, working life, motion balance, heat generation and wear of the machine tool. wait. Therefore, it is of great practical significance to analyze the static stiffness of the CNC machine tool in the design stage to ensure that the machine tool has sufficient static stiffness for its application.

Since the 1970s, in order to meet the requirements of high precision, high speed, energy saving and shortening product development cycle of precision machinery, rolling linear guides have been widely used. Rolling linear guide rails are generally composed of guide rails, sliders, return

It is composed of device, rolling element and cage. It is a new type of rolling bearing for relative reciprocating linear motion. It can replace the direct sliding contact with the steel ball rolling between the slider and the guide rail, and the rolling body can realize infinite circulation in the raceway and the slider.

The rolling linear guide pair is a kind of moving part that is widely used in modern CNC machine tools. It is often used in pairs in CNC machine tools, and a sliding seat is fixedly installed on the slider, which is the mechanism shown in Figure 1. . Figure 1 is a schematic diagram of the secondary mechanism of the rolling linear guide. It is composed of base, pad iron, guide rail, slider, slider and other components. Fig. 2 and Fig. 3 are the structural schematic diagrams of the Linear MC6000 type gantry machining center and the XNZH2430 type gantry type hybrid machine tool respectively. In these two representative machine tools, the rolling linear guide rail auxiliary mechanism shown in Fig. 1 has been obtained. application, only the form of the sliding seat has changed. However, there is a rolling linear guide rail auxiliary mechanism as shown in Figure 1. In order to analyze and predict the static stiffness of the machine tool more accurately in the design stage, it is necessary to have a thorough understanding of the static stiffness characteristics of the rolling linear guide mechanism.

Several literatures at home and abroad have studied the static stiffness of the mechanism shown in Figure 1, and obtained some calculation formulas. However, these analyzes are still in theory, and some assumptions have been made, such as considering both the slider and the slider as rigid bodies, which is obviously different from the actual situation. In order to have an accurate and thorough understanding of the static stiffness characteristics of the mechanism, it is necessary to conduct experimental research on it. In order to achieve the above purpose, we invented and designed the static stiffness test platform of the rolling linear guide pair.

Contents of the invention

The purpose of this utility model is to provide a static stiffness test platform for rolling linear guide rails for the deficiencies in the prior art, and it is characterized in that: the gantry frame 3 and the pad iron 4 are fixed and installed on the base 1 with bolts; Install the rolling linear guide rail 5 with bolts on the pad iron; install the slider 6 on the linear guide rail 5, and the slider 6 can slide freely in the x direction along the linear guide rail; 9 and the loading bolt 8 are set between the gantry frame 3 and the sliding seat 7, the dial indicator 2 is fixed on the base 1 opposite the force sensor 9 and the loading bolt 8, and the measuring head of the dial indicator 2 is in contact with the side of the sliding seat 7 .

The gantry frame 3 uses loading bolts 8 to apply a static load in the y or z direction to the sliding seat 7, and uses a dial gauge 2 to measure the corresponding deformation displacement, thereby obtaining the static stiffness of the structure.

The installation position of the gantry frame can be adjusted along the x direction, so that loads can be applied to different positions of the sliding seat.

This platform has laid the foundation for analyzing the static stiffness of the whole machine tool, helps designers understand and improve the static stiffness of the whole machine in the design stage, saves the development cost of the machine tool, and enhances the competitiveness of the enterprise. Moreover, the platform is easy to build and has a strong adaptability.

Description of drawings

Fig. 1 is a schematic diagram of a secondary mechanism of a rolling linear guide in the prior art.

Figure 2 is a schematic diagram of the structure of the Linear MC6000 type gantry machining center.

Figure 3 is a schematic structural diagram of the XNZH2430 gantry type hybrid machine tool.

Fig. 4 is a schematic structural diagram of the test platform for the static stiffness of the rolling linear guide pair of the present invention.

Detailed ways

The utility model provides an experimental platform for the static stiffness of rolling linear guide rail pairs. As shown in Figure 4, the structural schematic diagram of the static stiffness test platform of the rolling linear guide pair. In the figure, it includes a base 1 placed horizontally, two pad irons 4 mounted on the base 1, two rolling linear guides 5 mounted on the pads 4, and four slides mounted on the linear guides 5. Block 6, a slider 7 mounted on the slider 6, a gantry frame 3 mounted on the base 1, a dial indicator 2 mounted on the base 1, a loading bolt 8 mounted on a force sensor 9 superior. The force sensor 9 and the loading bolt 8 are arranged between the gantry frame 3 and the sliding seat 7, the dial indicator 2 is fixed on the base 1 opposite the force sensor 9 and the loading bolt 8, the measuring head of the dial indicator 2 and the sliding seat 7 side contact. The installation position of the gantry frame can be adjusted along the x direction, so that loads can be applied to different parts of the slide seat. The gantry frame 3 uses the loading bolt 8 to apply a static load in the y or z direction to the slide seat 7, and uses a dial gauge 2 to measure the corresponding load. The deformation displacement of the structure, from which the static stiffness of the structure can be obtained, helping the designer to understand and improve the static stiffness of the whole machine in the design stage.

Claims (3)

1. A rolling linear guide rail pair static stiffness test platform is characterized in that: on the base (1), bolts are used to install the gantry frame (3), parallel irons (4); Guide rail (5); slide block (6) is installed on the linear guide rail, and slide block (6) freely slides along the linear guide rail in the x direction; slide seat (7) is fixedly installed on the slide block (6) with bolts, and the force sensor ( 9) and the loading bolt (8) are arranged between the gantry frame (3) and the sliding seat (7), and the dial indicator (2) is fixed on the base (1) opposite the force sensor (9) and the loading bolt (8) , the measuring head of the dial indicator (2) is in contact with the side of the sliding seat (7). 2. According to claim 1, the rolling linear guide pair static stiffness test platform is characterized in that: the gantry frame (3) applies a static load in the y or z direction to the sliding seat (7) using a loading bolt (8), Subtable (2) measures the corresponding deformation displacement, from which the static stiffness of the structure can be obtained. 3. The test platform for static stiffness of the rolling linear guide pair according to claim 1, characterized in that: the installation position of the gantry frame can be adjusted along the x direction.

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