Dynamic performance testing device for high-speed motorized spindle

Abstract

The invention discloses a dynamic performance testing device for a high-speed motorized spindle. The device comprises a high-speed motorized spindle, a temperature vibration transmitter, a high-speed motorized spindle clamping mechanism, a milling cutter, a test workpiece, a test workpiece clamping mechanism and an XYZ three-axis movement module, the test workpiece clamping mechanism comprises a base, a fixed clamp, a protection plate, a movable clamp, a screw rod, a handle and a separation blade; the high-speed motorized spindle clamping mechanism comprises an upper tooth block and a lower tooth block; the high-speed motorized spindle clamping mechanism solves the problems that an existing high-speed motorized spindle clamping mechanism is poor in precision and low in rigidity, and the cost is high and waste is large due to the fact that high-speed motorized spindles of different specifications need to be provided with clamping mechanisms of different specifications. And the problems of low test efficiency and inaccurate result caused by the fact that the traditional dynamic performance test cannot be close to the actual working condition are solved. According to the device, the dynamic performance test of the high-speed motorized spindle can be realized, and the purposes of analyzing and evaluating the rigidity, the service life, the wear state and other performances of the bearing based on data acquired by the temperature vibration transmitter can be realized.

Description

Technical Field

[0001] The invention relates to the technical field of high-speed electric spindle testing, and in particular to a high-speed electric spindle dynamic performance testing device. Background Art

[0002] As the core functional component of high-speed CNC machine tools, high-speed electric spindles are key factors in improving the precision and production efficiency of parts in the machining process, and have outstanding advantages such as high speed, high precision and low noise. However, the traditional high-speed electric spindle clamping mechanism requires different specifications of high-speed electric spindle clamping mechanisms to clamp high-speed electric spindles of different specifications, and has poor precision, low rigidity, high cost and large waste; the traditional test workpiece clamping mechanism has poor reliability and cumbersome operation; the traditional high-speed electric spindle dynamic performance test device cannot simulate the real working conditions, has high heat generation, unstable load-bearing capacity and is not suitable for long-term loading. Summary of the invention

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a universal and reliable high-speed electric spindle dynamic performance test device. The device of the present invention can not only realize the reliable clamping of high-speed electric spindles and test workpieces of different specifications and sizes, but also can simulate the real working conditions, obtain the dynamic performance parameters such as temperature rise and vibration of the high-speed electric spindle through the temperature and vibration transmitter, and obtain the analysis and evaluation results such as the stiffness, life, and wear state of the bearing.

[0004] To achieve the above object, the technical solution of the present invention is as follows.

[0005] A high-speed electric spindle dynamic performance test device comprises: a high-speed electric spindle, a high-speed electric spindle clamping mechanism, a milling cutter, a test workpiece, a test workpiece clamping mechanism and a temperature vibration transmitter; the milling cutter is installed on the high-speed electric spindle, the high-speed electric spindle is installed on the high-speed electric spindle clamping mechanism, the test workpiece is installed on the test workpiece clamping mechanism, and the test workpiece clamping mechanism is installed on an XYZ three-axis motion module. When working, the milling cutter moves with the high-speed electric spindle to perform milling processing on the test workpiece, thereby realizing the dynamic performance test of the high-speed electric spindle; wherein: The test workpiece clamping mechanism includes a base, a fixed clamp, a guard plate, a movable clamp, a screw, a handle and a baffle. The fixed clamp is fixedly arranged at the bottom end of the vertically arranged base, the movable clamp is movably arranged on the base, one end of the screw is connected to the movable clamp, and the other end of the screw is connected to the handle. The guard plate is arranged below the movable clamp, and the guard plate and the baffle are installed on the movable clamp by the screw. The test workpiece is located between the fixed clamp and the movable clamp. The movable clamp is moved up and down by rotating the screw by the handle, and the test workpiece is clamped by moving the movable clamp downward.

[0006] In the present invention, the high-speed electric spindle clamping mechanism includes an upper tooth block and a lower tooth block, and the upper tooth block and the lower tooth block are connected by equal-length studs; when working, the high-speed electric spindle is arranged between the upper tooth block and the lower tooth block, and the upper tooth block and the lower tooth block are mutually engaged by locking the equal-length studs to constrain the high-speed electric spindle.

[0007] In the present invention, there are two temperature vibration transmitters, which are respectively arranged on both sides of the high-speed electric spindle.

[0008] In the present invention, the XYZ three-axis motion module includes four feed loading devices: a first feed loading device, a second feed loading device, a third feed loading device and a fourth feed loading device; the third and fourth feed loading devices are arranged horizontally in parallel in the X direction, the second feed loading device is arranged in the Y direction, and the first feed loading device is arranged in the Z direction. Each feed loading device includes parallel linear guides, sliders, ball screws, couplings and stepper motors. The stepper motor drives the ball screw through the coupling to drive the slider to realize linear motion on the linear guide. The second feed loading device is arranged on the sliders of the third and fourth feed loading devices, and the first feed loading device is arranged on the slider of the second feed loading device; the test workpiece clamping mechanism is installed on the slider of the first feed loading device.

[0009] Compared with the prior art, the present invention has the following beneficial effects: Different from the traditional high-speed electric spindle clamping mechanism, the present invention is compatible with the clamping of high-speed electric spindles of various specifications, realizes the clamping of high-speed electric spindles of different lengths and diameters, constrains the degrees of freedom of translation, rotation and vibration of the high-speed electric spindle, reduces the influence of deformation disturbance and vibration of key components on dynamic performance testing, has strong versatility, good stability and high efficiency; the material of the clamping mechanism of the present invention can be selected from HT200, which has good casting performance and shock absorption performance.

[0010] Different from the traditional test workpiece clamping, the present invention can clamp test workpieces of different sizes quickly and stably, is provided with a rotating handle, does not require additional tools, and is convenient for quick disassembly and replacement of the test workpiece.

[0011] The device of the present invention can simulate the real working condition with high precision, strong rigidity, high test efficiency and accurate results. The quality of the high-speed electric spindle is judged according to the dynamic performance parameters such as temperature rise and vibration of the high-speed electric spindle, and the rigidity, life and wear state of the bearing are analyzed and evaluated.

[0012] The device of the present invention is easy to use, has stable performance, and a simple structure, and can complete dynamic performance tests of high-speed electric spindles of various specifications; traditional dynamic performance testing devices usually require regular maintenance and adjustment, while the present device reduces the need for maintenance and adjustment, which not only simplifies maintenance work, but also reduces failures caused by human errors; at the same time, all driving force of the device comes from the motor, which is low in cost and simple to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is an overall assembly diagram of the high-speed electric spindle dynamic performance testing device of the present invention.

[0015] Figure 2 It is a top view of the high-speed electric spindle dynamic performance testing device of the present invention.

[0016] Figure 3 It is an overall AA cross-sectional view of the high-speed electric spindle dynamic performance testing device of the present invention.

[0017] Figure 4 It is a left view of the high-speed electric spindle dynamic performance testing device of the present invention.

[0018] Figure 5 It is a cross-sectional view of the whole KK of the present invention.

[0019] Figure 6 It is an exploded schematic diagram of the high-speed electric spindle clamping mechanism of the present invention.

[0020] Figure 7 This is an exploded schematic diagram of the test workpiece clamping mechanism of the present invention.

[0021] Figure 8 This is an exploded diagram of the first feed loading device.

[0022] In the figure: 1. high-speed electric spindle; 2. temperature vibration transmitter; 3. high-speed electric spindle clamping mechanism; 4. milling cutter; 5. test workpiece; 6. test workpiece clamping mechanism; a. first feed loading device; b. second feed loading device; c. third feed loading device; d. fourth feed loading device; 8. cast iron table with T-slot; 9. platform bracket; 301. upper tooth block; 302. lower tooth block; 601. base; 602. fixed clamp; 603. guard plate; 604. movable clamp; 605. screw; 606. handle; 607. baffle; 1a. first stepper motor; 2a. first motor flange; 3a. first coupling; 4a. first fixed side support seat; 5a. first linear guide rail; 6a. first ball screw; 7a. first slider; 8a. first nut seat; 9a. first base; 10a. first support side support seat; 7b. second slider. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] See also Figures 1 to 8 The present invention provides a high-speed electric spindle dynamic performance testing device, comprising: a high-speed electric spindle 1, a temperature vibration transmitter 2, a high-speed electric spindle clamping mechanism 3, a milling cutter 4, a test workpiece 5, a test workpiece clamping mechanism 6, first, second, third, and fourth feed loading devices a, b, c, and d, a cast iron table with a T-slot 8, a platform bracket 9, etc.

[0025] The high-speed electric spindle clamping mechanism 3 includes an upper tooth block 301 and a lower tooth block 302. The upper tooth block 301 and the lower tooth block 302 are connected by equal-length studs, and the meshing of the upper tooth block 301 and the lower tooth block 302 is achieved by locking the equal-length stud nuts, so that high-speed electric spindles 1 of different specifications can be clamped to constrain the degrees of freedom of translation, rotation and vibration of the high-speed electric spindle 1; the high-speed electric spindle clamping mechanism 3, the test workpiece clamping mechanism 6 and the first, second, third and fourth feed loading devices a, b, c, d are arranged on a cast iron table 8 with a T-slot, and the cast iron table 8 with a T-slot is arranged on a platform bracket 9.

[0026] The test workpiece clamping mechanism 6 includes a base 601, a fixed clamp 602, a guard plate 603, a movable clamp 604, a screw 605, a handle 606, and a baffle 607; the base 601 is vertically arranged, the movable clamp 604 is arranged on the base 601, one end of the screw 605 is connected to the movable clamp 604, and the other end of the screw 605 is connected to the handle 606, the guard plate 603 is arranged below the movable clamp 604, the guard plate 603 and the baffle 607 are installed on the movable clamp 604 through the screw, and the test workpiece clamping mechanism 6 includes a base 601, a fixed clamp 602, a guard plate 603, a movable clamp 604, a screw 605, a handle 606, and a baffle 607; the base 601 is vertically arranged, the movable clamp 604 is arranged on the base 601, one end of the screw 605 is connected to the movable clamp 604, and the other end of the screw 605 is connected to the handle 606, the guard plate 603 is arranged below the movable clamp 604, and the guard plate 603 and the baffle 607 are installed on the movable clamp 604 through the screw. The workpiece 5 is located between the fixed clamp 602 and the movable clamp 604. The movable clamp 604 is moved up and down by rotating the screw rod 605 through the handle 606, and the test workpiece 5 is clamped by moving the movable clamp 604 downward, with a maximum clamping of 120 mm. In a specific embodiment, the test workpiece 5 is made of 6061 aluminum alloy material and is in the shape of a plate with a length of 200 mm, a width of 100 mm, and a thickness of 100 mm. The milling cutter 4 rotates with the high-speed electric spindle 1 and acts on the test workpiece 5 for milling.

[0027] The high-speed electric spindle dynamic performance test device of the present invention includes four feed loading devices: a first feed loading device a, a second feed loading device b, a third feed loading device c and a fourth feed loading device d; the third and fourth feed loading devices c and d are arranged horizontally in parallel to each other in the X direction, the second feed loading device b is arranged in the Y direction, and the first feed loading device a is arranged in the Z direction; each feed loading device has the same structure, including parallel linear guides, sliders, ball screws, couplings and stepper motors; taking the first feed loading device as an example, the first feed loading device includes a first stepper motor 1a, a first motor flange 2a, a first coupling 3a, a first fixed side support seat 4a, a first linear guide 5a; a first ball screw 6a, a first slider 7a, a first nut seat 8a, a first base 9a, and a first support side support seat 10a; the first stepper motor 1a is installed on the first base 9a through the first motor flange 2a; the first coupling 3a connects the first stepper motor 1a and the first ball screw 6a; the first ball screw 6a is fixed to the first base 9a through the first fixed side support seat 4a and the first support side support seat 10a; the first stepper motor 1a drives the first ball screw 6a through the first coupling 3a to drive the first slider 7a to realize linear motion in the Z direction on the first linear guide 5a; the second feed loading device b is arranged on the sliders of the third and fourth feed loading devices c and d, and the first feed loading device a is arranged on the slider 7b of the second feed loading device b.

[0028] The test workpiece clamping mechanism 6 is installed on the slide block 7a of the first feed loading device a; the test workpiece clamping mechanism 6 can carry the test workpiece 5 to realize the movement in the X, Y and Z directions on the T-slot cast iron table 8.

[0029] Further, based on the high-speed electric spindle dynamic performance test device of the above structure, the use method of the high-speed electric spindle dynamic performance test device of the present invention is as follows: First, install the high-speed electric spindle 1 on the high-speed electric spindle clamping mechanism 3; install the test workpiece 5 on the test workpiece clamping mechanism 6; install the milling cutter 4 on the high-speed electric spindle 1; install the temperature vibration transmitter 2 on both sides of the high-speed electric spindle 1, with one on each side; Then the device is started. The device is based on the milling cutter 4 rotating with the high-speed electric spindle 1, acting on the test workpiece 5 to perform milling processing, and the temperature and vibration transmitter 2 collects the dynamic performance parameters such as temperature rise and vibration of the high-speed electric spindle 1 in real time; Finally, based on the dynamic performance parameters of the high-speed electric spindle 1 such as temperature rise and vibration obtained by the temperature and vibration transmitter 2, it is determined whether the high-speed electric spindle 1 meets the requirements of the manufacturing process and working conditions, and the stiffness, life, and wear state of the bearing are analyzed and evaluated; for example, when the collected temperature rise and vibration data are abnormal, it can be determined that the quality of the high-speed electric spindle 1 is unqualified, and it can be determined that the stiffness and life of the bearing are poor, and the wear is serious.

[0030] In summary, the present invention solves the problem of high cost and waste caused by the need to equip high-speed electric spindles of different specifications with clamping mechanisms of different specifications, as well as the problem of low test efficiency and inaccurate results caused by the inability of traditional dynamic performance tests to approach actual working conditions. The device of the present invention can achieve the purpose of dynamic performance testing of high-speed electric spindles and analyzing and evaluating the stiffness, life, wear status and other performance of bearings based on the data collected by the temperature vibration transmitter.

[0031] The above shows and describes the basic principles and main features of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A high-speed electric spindle dynamic performance test device, characterized in that: It includes: a high-speed electric spindle, a high-speed electric spindle clamping mechanism, a milling cutter, a test workpiece, a test workpiece clamping mechanism and a temperature vibration transmitter; the milling cutter is installed on the high-speed electric spindle, the high-speed electric spindle is installed on the high-speed electric spindle clamping mechanism, the test workpiece is installed on the test workpiece clamping mechanism, and the test workpiece clamping mechanism is installed on the XYZ three-axis motion module. When working, the milling cutter moves with the high-speed electric spindle to perform milling processing on the test workpiece, so as to realize the dynamic performance test of the high-speed electric spindle; Among them: The test workpiece clamping mechanism includes a base, a fixed clamp, a guard plate, a movable clamp, a screw, a handle and a baffle. The fixed clamp is fixedly arranged at the bottom end of the vertically arranged base, the movable clamp is movably arranged on the base, one end of the screw is connected to the movable clamp, and the other end of the screw is connected to the handle. The guard plate is arranged below the movable clamp, and the guard plate and the baffle are installed on the movable clamp by the screw. The test workpiece is located between the fixed clamp and the movable clamp. The movable clamp is moved up and down by rotating the screw by the handle, and the test workpiece is clamped by moving the movable clamp downward.

2. The high-speed electric spindle dynamic performance testing device according to claim 1 is characterized in that: The high-speed electric spindle clamping mechanism comprises an upper tooth block and a lower tooth block, and the upper tooth block and the lower tooth block are connected by equal-length studs. When working, the high-speed electric spindle is arranged between the upper tooth block and the lower tooth block, and the upper tooth block and the lower tooth block are mutually engaged by locking the equal-length studs to constrain the high-speed electric spindle.

3. The high-speed electric spindle dynamic performance testing device according to claim 1, characterized in that: There are two temperature vibration transmitters, which are respectively arranged on both sides of the high-speed electric spindle.

4. The high-speed electric spindle dynamic performance testing device according to claim 1, characterized in that: The XYZ three-axis motion module includes four feed loading devices: a first feed loading device, a second feed loading device, a third feed loading device and a fourth feed loading device; the third and fourth feed loading devices are arranged horizontally in parallel in the X direction, the second feed loading device is arranged in the Y direction, and the first feed loading device is arranged in the Z direction. Each feed loading device includes parallel linear guides, sliders, ball screws, couplings and stepper motors. The stepper motor drives the ball screw through the coupling to drive the slider to realize linear motion on the linear guide. The second feed loading device is arranged on the sliders of the third and fourth feed loading devices, and the first feed loading device is arranged on the slider of the second feed loading device; the test workpiece clamping mechanism is installed on the slider of the first feed loading device.

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