A machine tool spindle pulling and pressing static force loading mechanism and method

Abstract

The application provides a machine tool spindle tension and compression static force loading mechanism and method, which comprises a workpiece shaft connecting part used for being matched to a workpiece shaft of a machine tool, a tool shaft connecting part used for being matched to a tool shaft of the machine tool, a telescopic adjusting part telescopically arranged between the workpiece shaft connecting part and the tool shaft connecting part, and a sensor arranged on the telescopic adjusting part and used for measuring the force between the workpiece shaft connecting part and the tool shaft connecting part when the telescopic adjusting part is elongated or shortened. The application with the above structure only needs to correspondingly install the tool shaft connecting part and the workpiece shaft connecting part on the tool shaft and the workpiece shaft of the machine tool, then elongates the telescopic adjusting part to apply the compression force to the workpiece shaft and the tool shaft or shortens the telescopic adjusting part to apply the tension to the workpiece shaft and the tool shaft, and accurately obtains the data through the sensor, so as to measure and judge the tension and compression performance of the workpiece shaft and the tool shaft.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of machine tool testing equipment, and particularly relates to a machine tool spindle tension and compression static force loading mechanism and method. BACKGROUND

[0002] A numerical control machine tool is an automatic machine tool equipped with a program control system, and can make the machine tool act and process a part according to a programmed program. The numerical control machine tool combines mechanical, automatic, computer, microelectronic and other technologies, solves the processing problem of complex, precise and batch parts, and is a flexible and high-efficiency automatic machine tool. The numerical control machine tool mainly includes a workpiece shaft and a tool shaft, and the relative movement and rotation of the workpiece shaft and the tool shaft realize the tool setting and processing of the workpiece and the tool. In the processing process, the interaction force between the workpiece and the tool acts on the workpiece shaft and the tool shaft, so that the tensile and compression performance of the two needs to be detected in the production process of the numerical control machine tool. The traditional measurement structure has the following defects:

[0003] 1. Only fixed spatial position measurement can be performed, that is, the workpiece shaft and the tool shaft can only be measured at a specific angle state, and cannot be measured at any angle of 360° in the circumferential direction;

[0004] 2. Only compression capability can be measured, that is, the workpiece shaft and the tool shaft are controlled to approach each other to press the measurement structure, and the tensile capability cannot be measured;

[0005] 3. Rapid mounting and dismounting cannot be realized;

[0006] 4. In the process of controlling the tool box and the workpiece box to approach each other to press the tool shaft and the workpiece shaft, the main shaft and the measurement structure are a non-circular surface (cylindrical surface), which is easy to cause the rotation of the main shaft and poor measurement accuracy. SUMMARY

[0007] The present application aims to at least solve one of the above technical problems in the prior art. To this end, the present application provides, in a first aspect, a machine tool spindle tension and compression static force loading mechanism, which can be used to measure the tensile and compression performance of the workpiece shaft and the tool shaft of the machine tool.

[0008] In a second aspect, the present application provides a machine tool spindle tension and compression static force loading method using the above machine tool spindle tension and compression static force loading mechanism.

[0009] According to the machine tool spindle tension and compression static force loading mechanism of the first aspect of the embodiment of the present application, the workpiece shaft connecting part is used for being matched to the workpiece shaft of the machine tool, the tool shaft connecting part is used for being matched to the tool shaft of the machine tool, the telescopic adjusting part is arranged between the workpiece shaft connecting part and the tool shaft connecting part in a telescopic adjusting mode, the sensor is arranged on the telescopic adjusting part and is used for measuring the force between the workpiece shaft connecting part and the tool shaft connecting part when the telescopic adjusting part is elongated or shortened, and the measuring part is used for measuring the distance change between the workpiece shaft and the tool shaft of the machine tool.

[0010] According to the machine tool spindle tension and compression static force loading mechanism of the embodiment of the present application, at least the following beneficial effects are achieved.

[0011] According to the machine tool spindle tension and compression static force loading mechanism of the embodiment of the present application, at least the following beneficial effects are achieved.

[0012] According to some embodiments of the present application, the telescopic adjusting part is a screw rod adjusting structure.

[0013] According to some embodiments of the present application, the telescopic adjusting part comprises a thrust bearing, a static force conversion sleeve and a double-end stud which are connected in sequence, the thrust bearing is matched to the workpiece shaft connecting part or the tool shaft connecting part, and the sensor is arranged at the end of the double-end stud and is connected to the tool shaft connecting part or the workpiece shaft connecting part.

[0014] According to some embodiments of the present application, the double-end stud is provided with a force adding disc, and the circumferential side of the force adding disc is provided with a connecting hole for inserting a force adding rod.

[0015] According to some embodiments of the present application, the workpiece shaft connecting part and the tool shaft connecting part are used for being connected in a parallel state of the workpiece shaft and the tool shaft of the machine tool, the telescopic adjusting part is distributed along the radial direction of the workpiece shaft and the tool shaft of the machine tool, and the telescopic adjusting part is rotationally connected to the workpiece shaft connecting part and / or the tool shaft connecting part.

[0016] According to some embodiments of the present application, the workpiece shaft connecting part is provided with a first shaft segment coaxially distributed with the workpiece shaft, the tool shaft connecting part is provided with a second shaft segment coaxially distributed with the tool shaft, one end of the telescopic adjusting part is provided with a workpiece shaft quick-change connecting head sleeving the first shaft segment, and the other end is provided with a tool shaft quick-change connecting head sleeving the second shaft segment.

[0017] According to some embodiments of the present application, the tool shaft quick-change connecting head is fixed by screw connection with the second shaft segment.

[0018] According to some embodiments of the present application, the workpiece shaft connecting part is further provided with a workpiece shaft connecting flange, and the first shaft segment is arranged at the center of the workpiece shaft connecting flange.

[0019] According to some embodiments of the present application, the tool shaft connecting part is further provided with a tool shaft connecting flange, and the second shaft segment is arranged at the center of the tool shaft connecting flange.

[0020] The machine tool spindle pulling and pressing static force loading method according to the first aspect of the present application comprises the following steps:

[0021] S1, adjusting the workpiece shaft and the tool shaft of the machine tool to be vertical and parallel, then installing the workpiece shaft connecting part to the workpiece shaft and installing the tool shaft connecting part to the tool shaft;

[0022] S2, moving the workpiece shaft and the tool shaft to an appropriate distance, then installing the telescopic adjusting part between the workpiece shaft connecting part and the tool shaft connecting part;

[0023] S3, adjusting the telescopic adjusting part to exert a pressing force or a pulling force;

[0024] S4, measuring the relative displacement of the tool shaft and the workpiece shaft by the measuring part, and completing the measurement and evaluation of the static stiffness of the machine tool in the current orientation.

[0025] Additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0026] The present application will be further described below in combination with the drawings and embodiments, in which:

[0027] Figure 1 It is a schematic view of the overall structure of the present application;

[0028] Figure 2 It is a front view of the present application;

[0029] Figure 3 It is a side view of the present application. DETAILED DESCRIPTION

[0030] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar components or components having the same or similar functions are denoted by the same or similar reference numerals throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are for the purpose of explaining the present application only and are not to be understood as limiting the present application.

[0031] In the description of the present application, it should be understood that the orientation description, such as the indications of up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0032] In the description of the present application, the plural refers to two or more. If there is a description of first, second, etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the sequence of technical features indicated.

[0033] In the description of the present application, unless otherwise explicitly limited, the words such as arrangement, installation, connection, etc. should be broadly understood, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0034] Referring to Figures 1 to 3 As shown in the drawings, an embodiment of the machine tool spindle tension and compression static loading mechanism of the present application comprises a workpiece shaft connecting portion, a tool shaft connecting portion, a telescopic adjusting portion, and a sensor 107. The workpiece shaft connecting portion is used to fit to the workpiece shaft of the machine tool. The tool shaft connecting portion is used to fit to the tool shaft of the machine tool. The telescopic adjusting portion is telescopically adjusted between the workpiece shaft connecting portion and the tool shaft connecting portion. The sensor 107 is arranged on the telescopic adjusting portion and is used to measure the force between the workpiece shaft connecting portion and the tool shaft connecting portion when the telescopic adjusting portion is elongated or shortened.

[0035] The present application with the above structure only needs to correspondingly install the tool shaft connecting portion and the workpiece shaft connecting portion to the tool shaft and the workpiece shaft of the machine tool, then elongate the telescopic adjusting portion to exert pressure on the workpiece shaft and the tool shaft, or shorten the telescopic adjusting portion to exert tension on the workpiece shaft and the tool shaft, and accurately obtain data through the sensor 107, thereby measuring and judging the tension and compression performance of the workpiece shaft and the tool shaft. Through the quick installation and connection of the tool shaft connecting portion and the workpiece shaft connecting portion, the tensile performance of the spindle can be measured, and the compression performance of the spindle can also be measured. At the same time, circumferential 360° measurement at any angle can be realized.

[0036] It is understandable that the telescopic adjustment unit can adopt a manual telescopic adjustment structure or an electronically controlled adjustment structure. Furthermore, the specific telescopic principle can be a structure with a piston rod, such as a cylinder or hydraulic cylinder, or a structure with a threaded adjustment or gear adjustment.

[0037] To facilitate adjustment, in some embodiments of the present invention, the telescopic adjustment part is a screw adjustment structure. Since different magnitudes of force may need to be applied during actual measurement to determine the displacement between the workpiece axis and the tool axis, thereby determining their tensile and compressive properties, a screw adjustment structure facilitates the application of different forces while maintaining relative stability. A manual adjustment structure is also preferred.

[0038] Reference Figure 1 , Figure 2 In some embodiments of the present invention, the telescopic adjustment part includes a thrust bearing 103, a static conversion sleeve 104, and a double-ended stud 105 connected in sequence. The thrust bearing 103 is fitted onto the workpiece shaft connection part or the tool shaft connection part. The sensor 107 is located at the end of the double-ended stud 105 and connected to the tool shaft connection part or the workpiece shaft connection part. Using the structure of this embodiment, only the rotation of the double-ended stud 105 needs to be controlled to adjust the opening and closing of the static conversion sleeve 104 and the sensor 107, thereby applying different forces to the workpiece shaft and the tool shaft, and the magnitude of the specific force can be read by the sensor 107. Preferably, two thrust bearings 103 are provided, corresponding to the tensile state and the compressive state respectively.

[0039] Reference Figure 1 , Figure 2 In some embodiments of the present invention, the double-ended stud 105 is provided with a force-applying disc 106, and the periphery of the force-applying disc 106 is provided with a connecting hole for inserting a force-applying rod. In actual operation, the user can conveniently adjust the rotation of the double-ended stud 105 by inserting a force-applying rod into the connecting hole. A threaded connection can be used between the connecting hole and the force-applying rod to reinforce the connection.

[0040] Considering the convenience of workpiece loading and unloading, many machine tools adopt a vertically arranged workpiece axis layout, while the corresponding tool axis can perform multi-axis movement and rotation adjustment. Correspondingly, in some embodiments of the present invention, the workpiece axis connecting part and the tool axis connecting part are used to connect the workpiece axis and the tool axis of the machine tool in a vertically parallel state. The telescopic adjustment part is distributed radially along the workpiece axis and the tool axis of the machine tool, and the telescopic adjustment part is rotatably connected to the workpiece axis connecting part and the tool axis connecting part. Using the structural arrangement of this embodiment, the telescopic adjustment part, through its rotatable connection, can realize tensile and compressive testing at any circumferential angle position of the tool axis and the workpiece axis. Furthermore, the applied force is a radial force of the tool axis and the workpiece axis, ensuring measurement accuracy.

[0041] Referring to Figure 1 、 Figure 2 In some embodiments of the present application, the workpiece shaft connecting part is provided with a first shaft segment 109 coaxially distributed with the workpiece shaft, the tool shaft connecting part is provided with a second shaft segment 101 coaxially distributed with the tool shaft, one end of the telescopic adjusting part is provided with a workpiece shaft quick-change connecting head 108 sleeving the first shaft segment 109, and the other end is provided with a tool shaft quick-change connecting head 102 sleeving the second shaft segment 101. The tool shaft quick-change connecting head 102 is fixedly connected with the second shaft segment 101 by bolts.

[0042] In some embodiments of the present application, the workpiece shaft connecting part is further provided with a workpiece shaft connecting flange 110, and the first shaft segment 109 is arranged at the center of the workpiece shaft connecting flange 110. The tool shaft connecting part is further provided with a tool shaft connecting flange 100, and the second shaft segment 101 is arranged at the center of the tool shaft connecting flange 100. The flange connection can ensure the structural strength and effectively transmit the force to the workpiece shaft and the tool shaft, thereby ensuring the test accuracy.

[0043] In some embodiments of the present application, the machine tool spindle tension and compression static force loading mechanism further comprises a measuring part for measuring the distance change between the workpiece shaft and the tool shaft of the machine tool. The measuring part can adopt a conventional measuring scale.

[0044] The machine tool spindle tension and compression static force loading mechanism in the present application can adopt the following machine tool spindle tension and compression static force loading method:

[0045] 1. Adjust the workpiece shaft and the tool shaft of the machine tool to be vertical and parallel, and then install the two flanges correspondingly;

[0046] 2. Move the workpiece shaft and the tool shaft to an appropriate distance, and then install the telescopic adjusting part between the two flanges;

[0047] 3. Manually rotate the double-end stud 105 to apply a compression force (tension when elongated) or a tension force;

[0048] 4. Measure the relative displacement of the tool shaft and the workpiece shaft to complete the measurement and evaluation of the static stiffness of the machine tool in this orientation.

[0049] In summary, the present application can be used for tension and compression force testing and comprehensive evaluation of the static stiffness of the machine tool processing area at any angle.

[0050] The present application has the following advantages:

[0051] 1. The two main shafts are connected by two flanges, which can control the workpiece shaft and the tool shaft to approach each other for compression resistance performance testing, and can also control the two to move away for compression resistance performance testing;

[0052] 2、 The whole structure is connected and fixed with the main shaft, and the relative angle of the workpiece shaft and the cutter shaft can be changed by moving the workpiece box and the cutter box to measure. As shown in the drawings, the measurement of any angle state of 360° can be realized;

[0053] 3、 During the pressure loading process, the connection part and the main shaft are basically matched by a cylindrical surface, the stress is stable, and the main shaft will not rotate, so the measurement accuracy is higher;

[0054] 4、 The structure is simple, can realize quick installation and disassembly, and can ensure the measurement accuracy.

[0055] The application has been described in detail in combination with the embodiments above, but the application is not limited to the above embodiments, and various changes can be made within the knowledge range of ordinary skilled persons in the art without departing from the purpose of the application.

Claims

1. A machine tool spindle pull, push static force loading mechanism, characterized in that, The utility model relates to a machine tool spindle tension and compression static force loading mechanism, including the following: Workpiece shaft connecting part for fitting to the workpiece shaft of machine tool; Tool shaft connecting part for fitting to the tool shaft of machine tool; Telescopic adjusting part can be telescopic adjustingly arranged between the workpiece shaft connecting part and tool shaft connecting part; Sensor arranged on the telescopic adjusting part for measuring the force between the workpiece shaft connecting part and tool shaft connecting part when the telescopic adjusting part is elongated or shortened; Measuring part for measuring the distance change between the workpiece shaft and tool shaft of machine tool; The telescopic adjusting part is screw rod adjusting structure; The telescopic adjusting part includes thrust bearing, static force conversion sleeve and stud bolt connected in sequence, the thrust bearing is fitted in the workpiece shaft connecting part or the tool shaft connecting part, the sensor is arranged at the end of the stud bolt and connected with the tool shaft connecting part or the workpiece shaft connecting part; The stud bolt is provided with force adding disc, the circumferential side of force adding disc is provided with connecting hole for inserting force adding rod; The workpiece shaft connecting part and tool shaft connecting part are used for connecting in the parallel state of the workpiece shaft and tool shaft of machine tool, the telescopic adjusting part is distributed along the radial direction of the workpiece shaft and tool shaft of machine tool, and the telescopic adjusting part is rotationally connected with the workpiece shaft connecting part and / or tool shaft connecting part; The workpiece shaft connecting part is provided with first shaft section coaxially distributed with workpiece shaft, the tool shaft connecting part is provided with second shaft section coaxially distributed with tool shaft, one end of the telescopic adjusting part is provided with workpiece shaft quick change connector sleeving the first shaft section, the other end is provided with tool shaft quick change connector sleeving the second shaft section.

2. The machine tool spindle pull, push static force loading mechanism according to claim 1, characterized in that, The tool shaft quick change connector is fixed by bolt connection with the second shaft section.

3. The machine tool spindle pull, push static force loading mechanism according to claim 1, characterized in that, The workpiece shaft connecting part is further provided with workpiece shaft connecting flange, and the first shaft section is arranged at the center of the workpiece shaft connecting flange.

4. The machine tool spindle pull, push static force loading mechanism according to claim 1, characterized in that, The tool shaft connecting part is further provided with tool shaft connecting flange, and the second shaft section is arranged at the center of the tool shaft connecting flange.

5. A method of tensile and compressive static loading of a machine tool spindle, characterized in that The machine tool spindle tension and compression static force loading mechanism is applied to the machine tool of claim 1, including the following steps: S1, adjust the workpiece shaft and tool shaft of machine tool to be vertical and parallel, then install the workpiece shaft connecting part to the workpiece shaft and install the tool shaft connecting part to the tool shaft; S2, move the workpiece shaft and tool shaft to appropriate distance, then install the telescopic adjusting part between the workpiece shaft connecting part and tool shaft connecting part; S3, adjust the telescopic adjusting part to apply pressure or tension; S4, measure the relative displacement of the tool shaft and workpiece shaft by the measuring part, complete the measurement and evaluation of the static stiffness of machine tool in the current orientation.

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