A device for measuring axial clamping force of a machine tool in real time

Abstract

The utility model belongs to the field of measurement and testing, concretely relates to a device capable of measuring axial clamping force of machine tool in real time, including casing, elastic element, end cover, centre of a circle with scale, the outer circumferential surface of one end of casing is provided with screw thread, and the inner threaded hole of end cover is matched, the elastic element is installed in casing, and the one end of centre of a circle with scale is slidably installed in casing, and is contacted with elastic element, the other end of centre of a circle passes through the inner threaded hole and the cylindrical hole on end cover, and the outer circumferential surface of centre of a circle passing through inner threaded hole and cylindrical hole is provided with graduation, the utility model can measure axial clamping force in the machining process of machine tool in real time, adjusts the rigidity and stability of processing system, avoids the deformation in the machining process of part, guarantees product quality, and further expands the processing capacity of machine tool.

Description

Technical Field

[0001] This utility model belongs to the field of metrology and testing, and specifically relates to a device that can measure the axial clamping force of a machine tool in real time. Background Technology

[0002] For parts that require controlled axial clamping force from the machine tool tailstock during machining, such as thin-walled cylindrical or slender rod structures, the common method is to use ordinary centers to hold the part in place of its center hole. However, the axial clamping force from the machine tool tailstock cannot be monitored during machining, which can easily lead to increased scrap rates due to axial deformation of the part. Utility Model Content

[0003] The purpose of this utility model is:

[0004] To address the problem of unmonitored clamping force during the machining of thin-walled cylindrical, slender rod, and other structural parts, this invention provides a device that can measure the axial clamping force of a machine tool in real time. This device can measure the axial clamping force during the machining process, adjust the rigidity and stability of the machining system, prevent deformation of parts during machining, ensure product quality, and further expand the machining capabilities of the machine tool.

[0005] Technical solution:

[0006] A device for real-time measurement of axial clamping force of a machine tool includes a housing 1, an elastic element 4, an end cap 5, and a graduated tip 8. A thread 2 is provided on the outer circumferential surface of one end of the housing 1, which cooperates with the internal threaded hole 6 of the end cap 5. The elastic element 4 is installed in the housing 1. One end of the graduated tip 8 is slidably installed in the housing and contacts the elastic element 4. The other end of the tip 8 passes through the internal threaded hole 6 and the cylindrical hole 7 on the end cap 5. A scale line 12 is provided on the outer circumferential surface of the tip 8 that passes through the internal threaded hole 6 and the cylindrical hole 7.

[0007] Furthermore, a center hole 3 is provided on the other end of the housing 1 for connecting with the center of the machine tool, so that the measuring device can be installed on the machine tool.

[0008] Furthermore, the end cap 5 has a nut structure with a cylindrical hole 7, the internal threaded hole 6 is engaged with the thread 2 on the outer circumferential surface of one end of the housing 1, and the cylinder b10 of the tip 8 is clearance-fitted with the cylindrical hole 7.

[0009] Furthermore, the graduated tip 8 includes a cylinder a9 that slides in conjunction with the inner hole of the housing 1. One end of the cylinder a9 is an end face that contacts the elastic element 4, and the other end is connected to a graduated cylinder b10. The other end of the graduated cylinder b10 is connected to a cone.

[0010] Furthermore, several flat surfaces 11 are machined on the cylinder a9 along the axial direction. Each flat surface 11 is parallel to the axis of the cylinder a9. Several engraved lines 12 are engraved on the cylinder b10 with engraving lines.

[0011] Furthermore, the elastic element 4 is selected according to the magnitude of the axial clamping force, and the elastic element 4 is preferably a spring.

[0012] Beneficial effects

[0013] This invention provides a device that can measure the axial clamping force of a machine tool tailstock in real time and can cooperate with any center. It solves the problem of high scrap rates caused by the inability to accurately control and monitor the axial clamping force during the machining of thin-walled cylindrical, slender rod, and other parts. It can cooperate with any fixed or rotating center to clamp the workpiece and monitor the magnitude of the axial force in real time during machining. This solves the problem of not being able to promptly detect changes in axial force during machining that exceed process requirements or cause the product's dimensions to deviate from expectations. Previously, if the axial force exceeded expectations, it could not be detected in time, and dimensional deviations could only be discovered after the product was finished and inspected. Attached Figure Description

[0014] Figure 1 This is an assembly and usage diagram of the device of this utility model.

[0015] Figure 2 This is a schematic diagram of the structure of this device with graduated tips.

[0016] Figure 3 This is an assembly and usage diagram of the device of this utility model.

[0017] Among them, 1-shell, 2-thread, 3-center hole, 4-elastic element, 5-end cap, 6-internal thread, 7-cylindrical hole, 8-center, 9-cylinder a, 10-cylinder b, 11-flat surface, 12-scale line. Detailed implementation method:

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific examples:

[0020] This invention proposes a measuring device for real-time measurement of the axial clamping force of a machine tool, comprising a housing 1, an elastic element 4, an end cap 5, and a graduated tip 8. The graduations on the graduated tip 8 are read through one edge of the end cap 5.

[0021] Among them, the shell 1 is a cylindrical structure, with a thread 2 on one end of the shell 1 and a top hole 3 on the other end of the shell 1; the main structure of the end cap 5 is an internal thread hole 6 and a cylindrical hole 7 at one end.

[0022] The main structure of the graduated tip 8 is a cylinder 9, connected to a graduated cylinder 10. The other end of the graduated cylinder 10 is connected to a cone. Several flat surfaces 11 are machined along the axial direction of the cylinder 9, each flat surface 11 being parallel to the axis of the cylinder 9. The graduated cylinder 10, which connects to the cone, is engraved with several graduations 12. The graduations of the graduations 12 are the measurement parameters required during measurement. The force or displacement values ​​of the graduations 12 can be calibrated using a spring testing machine before machining, based on the magnitude of the axial clamping force.

[0023] The method of using the measuring device for real-time measurement of the axial clamping force of a machine tool tailstock according to this utility model includes the following steps:

[0024] 1) When using it, first fix the tailstock of the machine tool.

[0025] 2) Adjust the extension of the machine tool center to make the center hole 3 contact the position of the machine tool center.

[0026] 3) The graduated tip 8 contacts the tip hole of the part.

[0027] 4) Adjust the position of the machine tool tip extension so that the end cover 5 is pressed to the appropriate scale line position of the tip 8 with scale, so as to obtain the desired axial clamping force applied by the tip to the workpiece.

[0028] 5) Throughout the entire processing, the positional changes of the end cap 5 and the graduated tip 8 are monitored, and these changes reflect the magnitude of the axial clamping force and workpiece deformation.

[0029] 6) If the positional changes of the end cap 5 and the graduated tip 8 marking 12 are within an acceptable range during the entire processing, then the entire processing is valid. If the positional changes of the end cap 5 and the graduated tip 8 marking 12 are close to an unacceptable range during the processing, then the tailstock tip extension position should be adjusted in time to ensure that the axial clamping force is the expected force value during the entire processing.

[0030] 7. By observing the changes in the position of the graduation line 12 on the end cap 5 and the graduated tip 8, the axial deformation of the workpiece caused by the cutting force and the tool wear can be monitored. If necessary, the tool can be replaced, and parameters such as depth of cut, feed rate, and spindle speed can be adjusted appropriately.

[0031] This utility model has many specific applications. The above description is only a preferred embodiment of this patent and does not limit the implementation method and protection scope of this patent. For those skilled in the art, the solutions obtained by making equivalent substitutions and obvious changes under the premise of the principle of this patent should be included in the protection scope of the patent.

Claims

1. A device for real-time measurement of the axial clamping force of a machine tool, characterized in that, It includes a housing (1), an elastic element (4), an end cap (5), and a graduated tip (8); a thread (2) is provided on the outer circumferential surface of one end of the housing (1), which cooperates with the internal thread hole (6) of the end cap (5). The elastic element (4) is installed in the housing (1). One end of the graduated tip (8) is slidably installed in the housing and contacts the elastic element (4). The other end of the tip (8) passes through the internal thread hole (6) and the cylindrical hole (7) on the end cap (5). A scale line (12) is provided on the outer circumferential surface of the tip (8) that passes through the internal thread hole (6) and the cylindrical hole (7).

2. The device for real-time measurement of machine tool axial clamping force according to claim 1, characterized in that, The other end of the housing (1) has a center hole (3) for connecting with the center of the machine tool to install the measuring device on the machine tool.

3. The device for real-time measurement of machine tool axial clamping force according to claim 1, characterized in that, The end cap (5) has a nut structure with a cylindrical hole (7). The internal threaded hole (6) is engaged with the thread (2) on the outer circumferential surface of one end of the housing (1). The cylinder b (10) of the tip (8) is in clearance engagement with the cylindrical hole (7).

4. The device for real-time measurement of machine tool axial clamping force according to claim 3, characterized in that, The graduated tip (8) includes a cylinder a (9) that slides in the inner hole of the housing (1). One end of the cylinder a (9) is an end face that contacts the elastic element (4), and the other end is connected to a graduated cylinder b (10). The other end of the graduated cylinder b (10) is connected to a cone.

5. The device for real-time measurement of machine tool axial clamping force according to claim 4, characterized in that, Several flat surfaces (11) are machined on cylinder a (9) along the axial direction. Each flat surface (11) is parallel to the axis of cylinder a (9). Several engraved lines (12) are engraved on cylinder b (10).

6. The device for real-time measurement of axial clamping force of a machine tool according to claim 1, characterized in that, The elastic element (4) is selected according to the magnitude of the axial clamping force.

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