Numerical control machine tool clamp stability vibration testing device

Abstract

The invention relates to the technical field of machine tool fixture testing, in particular to a numerical control machine tool fixture stability vibration testing device which comprises a detection bed frame, a detection component and a brake component. A gravity center adjusting screw rod in the counterweight assembly is rotated, so that two gravity center adjusting slide blocks are driven to move along two straight grooves in the direction far away from the test rod under the action of thread thrust between the gravity center adjusting screw rod and an inner thread pipe, and the two gravity center adjusting slide blocks further drive two gravity weights to move together; at the moment, the overall gravity center of the counterweight assembly, the counterweight block and the test rod deviates from the circle center of the test rod, the right end of the test rod vibrates, and the overall gravity center position of the counterweight assembly, the counterweight block and the test rod can be adjusted by adjusting the moving distance of the internal thread pipe, so that the test rod can rotate in the rotating period of the test rod. The right end generates vibration of different amplitudes, the clamping stability of the numerical control machine tool clamp can be tested according to different vibration intensities, the detection range is widened, and the detection intensity is improved.

Description

Technical Field

[0001] The invention relates to the technical field of machine tool fixture testing, in particular to a numerical control machine tool fixture stability vibration testing device. Background Art

[0002] CNC machine tools are short for digitally controlled machine tools. They are automated machine tools equipped with a program control system. Processing parts on CNC machine tools mainly depends on the processing program. It does not require the manufacture or replacement of many molds and fixtures, and does not require frequent readjustment of the machine tools. Therefore, CNC machine tools are suitable for occasions where the processed parts are frequently replaced, and the stability of CNC machine tool fixtures plays an important role in workpiece processing. According to a Chinese patent application with the publication number CN117629560A, a CNC machine tool fixture stability test device is disclosed. The protrusion on the wedge-shaped rod frame continuously pushes the heavy hammer to move upward, so that the heavy hammer continuously hammers the test rod, simulating the stability of the clamping state of the test fixture during actual work. If the test rod shakes or deviates, the transmission rod will shake or move obliquely downward, so that the heavy ball rolls down from the limit plate under the action of gravity. The staff judges the stability of the test fixture when clamping the test rod by observing the state of the heavy ball, thereby completing the stability test of the test fixture in the clamping state. However, since the internal texture distribution of the workpiece itself may be uneven, it is actually impossible to ensure that the center of gravity position of the workpiece coincides with the axis position of its rotation during the processing process during the processing. Therefore, the biggest factor causing the vibration of the fixture is the eccentric force factor of the workpiece during the rotation process, and the above-mentioned test device cannot test the clamping effect of its vibration on the machine tool fixture when the workpiece rotates. For this reason, we propose a CNC machine tool fixture stability vibration test device to solve the above-mentioned technical problems. Summary of the invention

[0003] The present invention provides the following technical solution: a vibration test device for the stability of a CNC machine tool fixture, comprising a detection bed frame, a detection component and a brake component, wherein the detection component is provided on the top of the detection bed frame, a rotating side seat is fixedly provided on the left end of the top of the detection bed frame, and a brake component is provided on the top of the detection bed frame, and the brake component is located on the right part of the rotating side seat; The detection component includes a drive shaft rotatably mounted inside the rotating side seat, a connection plate is fixedly mounted on the right end of the drive shaft, and the detection component also includes a test rod located at the right end of the connection plate, a counterweight block and a counterweight assembly are fixedly mounted on the right end of the outer wall of the test rod; The counterweight assembly includes a U-shaped frame fixedly mounted on the right end of the outer wall of the test rod, a center of gravity adjustment screw is rotatably mounted inside the U-shaped frame, an inner threaded tube is screwed onto the outer thread of the center of gravity adjustment screw, a center of gravity adjustment slider is fixedly mounted on the outer wall of the inner threaded tube, and a gravity weight is fixedly mounted on the end of the center of gravity adjustment slider.

[0004] As a preferred solution of the present invention, the U-shaped frame and the counterweight block are distributed on both sides of the center of the test rod, the number of the center of gravity adjustment sliders is two, and the two center of gravity adjustment sliders are symmetrically distributed about the center of the inner wire tube, straight grooves are penetrated through the inner walls on both sides of the U-shaped frame, and the center of gravity adjustment sliders slide inside the straight grooves, and the weight of the gravity weight is matched with the weight of the counterweight block.

[0005] As a preferred solution of the present invention, the top left end and the top right end of the rotating side seat are fixedly installed with two upper and lower distributed cantilevers through channel steel, and two front and rear distributed sleeve shafts are rotatably installed between the two upper and lower distributed cantilevers, wherein the outer walls of the two sleeve shafts located at the top left end of the detection bed frame are fixedly installed with spur gears, and the left end of the outer wall of the test rod is fixedly installed with an annular gear sleeve, and the annular gear sleeve is meshed with two spur gears, and the outer wall of one of the sleeve shafts is fixedly installed with a pointer, and the pointer is located at the bottom of the spur gear, wherein a dial is fixedly installed on the surface of one of the cantilevers located at the top left end of the detection bed frame, and the dial is located at the bottom of the pointer, and the position of the pointer corresponds to the scale position opened on the top of the dial.

[0006] As a preferred solution of the present invention, a power motor is fixedly installed at the left end of the bottom of the detection bed frame, a driving groove wheel is fixedly installed on the output shaft of the power motor, a driven groove wheel is fixedly installed on the left end of the outer wall of the driving shaft, and at least one V-belt is commonly sleeved between the driving groove wheel and the driven groove wheel.

[0007] As a preferred solution of the present invention, the braking component includes an insertion rod slidably inserted in the top of the inner wall of the sleeve shaft and a insertion rod slidably inserted in the bottom of the inner wall of the sleeve shaft, and a suspension arm is fixedly installed at one end of the outer wall of the insertion rod away from the sleeve shaft, wherein the two suspension arms at the upper and lower positions are symmetrically distributed, and the two suspension arms at the left and right positions are symmetrically distributed, wherein a brake pressure plate is fixedly installed between the left and right suspension arms, and wherein a plurality of brake strips distributed at equal intervals on the left and right are fixedly installed between the front and rear brake pressure plates.

[0008] As a preferred solution of the present invention, the brake strip is riveted to the surface of the brake pressure plate by rivets, and the brake strip is made of cotton and linen material.

[0009] As a preferred solution of the present invention, two pulling springs distributed left and right are fixedly installed between the two brake pressure plates in the upper and lower directions, an anti-slip pin is fixedly installed on the end of the outer wall of the insertion rod away from the boom, annular grooves are provided at the top and bottom of the sleeve shaft, and vertical grooves are provided at the upper part of the outer wall of the sleeve shaft and the lower part of the outer wall. The vertical grooves are connected with the annular grooves, the groove width of the vertical grooves is larger than the diameter of the anti-slip pins, and the anti-slip pins are located inside the annular grooves, and the positions of the anti-slip pins do not overlap with the positions of the vertical grooves.

[0010] As a preferred solution of the present invention, a rocker arm is fixedly mounted on the upper portion of the outer wall of the sleeve shaft, wherein a pull rod is hingedly connected between the two rocker arms at the left and right positions.

[0011] As a preferred solution of the present invention, the distance between the inner wall of the cantilever frame and the outer wall of the test rod is 50-60 mm, the distance between the outer wall of the test rod and the outer wall of the sleeve shaft is 50-60 mm, and the distance between the pulling spring and the test rod is 50-60 mm.

[0012] As a preferred solution of the present invention, the annular gear sleeve is sleeved on the periphery of the test rod, and the annular gear sleeve is fixed to the test rod by fastening bolts.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by rotating the center of gravity adjusting screw in the counterweight assembly, the threaded thrust between the center of gravity adjusting screw and the inner thread tube drives the two center of gravity adjusting sliders to move along the two straight grooves in the direction away from the test rod, and the two center of gravity adjusting sliders further drive the two gravity weights to move together. At this time, the overall center of gravity of the counterweight assembly, the counterweight block and the test rod deviates from the center of the circle of the test rod, which will cause the right end of the test rod to vibrate, and by adjusting the distance moved by the inner thread tube, the overall center of gravity position of the counterweight assembly, the counterweight block and the test rod can be adjusted, so that during the rotation of the test rod, its right end generates vibrations of different amplitudes, and the clamping stability of the CNC machine tool fixture can be tested under different vibration intensities, thereby improving the detection range and detection intensity.

[0014] 2. In the present invention, the vibration of the right end of the test rod will cause the test rod to shift inside the clamp of the fixture, and the displacement of the test rod directly drives the movement of the annular gear sleeve, and the movement of the annular gear sleeve drives the two spur gears together with the sleeve shaft fixedly connected to the spur gears to rotate. The rotation of one of the sleeve shafts also drives the pointer to rotate, causing a deviation between the reference position of the pointer and the scale of the dial. The inspector can know whether the test rod has moved by observing the position of the pointer and the scale of the dial, and then judge the clamping stability of the CNC machine tool fixture, which is very practical.

[0015] 3. In the present invention, if the displacement of the test rod is large, the movement of the test rod drives the annular gear sleeve to move, resulting in the rotation of the spur gear and the sleeve shaft connected to the spur gear. The rotation of the sleeve shaft drives the two sleeve shafts at the right end to rotate through the linkage action of the left and right rocker arms and the pull rod. The rotation of the sleeve shaft drives the annular groove and the vertical groove to rotate together. When the rotation of the vertical groove overlaps with the position of the anti-slip pin, the abutment force of the annular groove wall on the anti-slip pin disappears, and the two pulling springs in a compressed state immediately rebound, so that the upper and lower brake pressure plates move toward the middle. The movement of the brake pressure plate drives the hanging arm to move together. The movement of the hanging arm drives the insertion rod to slide into the inside of the sleeve shaft. The hanging arm further drives the anti-slip pin to slide along the inner wall of the vertical groove until the upper and lower brake pressure plates abut against each other, and the brake strips distributed up and down are stretched to cover the periphery of the test rod. At the same time, the power motor is powered off, and multiple test rods are tightly covered on the periphery of the test rod, which can quickly brake the rotating test rod, so that it quickly changes from dynamic rotation to static state, thereby preventing the test rod from falling off the CNC machine tool fixture, reducing the probability of detection safety accidents, and improving detection safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention from the right front perspective; Figure 2 It is a schematic diagram of the left front viewing angle structure of the present invention; Figure 3 It is a schematic diagram of the structure of the detection component and the braking component in the present invention; Figure 4 It is a schematic diagram of the structure of the brake component in the present invention from the left front perspective; Figure 5 It is a schematic diagram of the structure of the brake component in the present invention from the right front perspective; Figure 6 It is a detailed structural diagram of the test rod in the present invention; Figure 7 For the present invention Figure 6 A schematic diagram of the enlarged structure of part A; Figure 8 It is a detailed structural diagram of the brake component in the present invention; Fig. 9 It is a detailed structural schematic diagram of the sleeve shaft in the present invention; Fig.10 It is a schematic diagram of the structure of the anti-slip pin in the present invention; Fig.11 For the present invention Figure 8 Schematic diagram of the enlarged structure of part B.

[0017] In the figure: 100, detection bed frame; 101, rotating side seat; 102, lifting frame; 200, detection component; 201, driving shaft; 202, connecting plate; 203, test rod; 204, counterweight; 205, U-shaped frame; 206, center of gravity adjustment screw rod; 207, inner thread tube; 208, center of gravity adjustment slider; 209, gravity weight; 2010, straight groove; 2011, annular gear sleeve; 2012, sleeve shaft; 20 13. spur gear; 2014. pointer; 2015. dial; 300. brake component; 301. plug rod; 302. boom; 303. brake pressure plate; 304. brake strip; 306. anti-skid pin; 307. annular groove; 308. vertical groove; 309. tension spring; 400. rocker arm; 500. pull rod; 600. power motor; 601. active sheave; 602. driven sheave; 603. V-belt. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-Figure 11 The technical solution provided by the present invention specifically includes the following embodiments: Embodiment 1: A CNC machine tool fixture stability vibration test device comprises a detection bed frame 100, a detection component 200 and a brake component 300, wherein the detection component 200 is arranged on the top of the detection bed frame 100, a rotating side seat 101 is fixedly arranged on the top left end of the detection bed frame 100, and a brake component 300 is arranged on the top of the detection bed frame 100, and the brake component 300 is located on the right part of the rotating side seat 101; The detection component 200 includes a driving shaft 201 rotatably mounted inside the rotating side seat 101, a connecting plate 202 is fixedly mounted on the right end of the driving shaft 201, and the detection component 200 also includes a test rod 203 located at the right end of the connecting plate 202, a counterweight block 204 and a counterweight assembly are fixedly mounted on the right end of the outer wall of the test rod 203, and the counterweight assembly includes a U-shaped frame 205 fixedly mounted on the right end of the outer wall of the test rod 203, a center of gravity adjustment screw rod 206 is rotatably mounted inside the U-shaped frame 205, an inner thread tube 207 is screwed to the outer thread of the center of gravity adjustment screw rod 206, a center of gravity adjustment slider 208 is fixedly mounted on the outer wall of the inner thread tube 207, and a gravity weight 209 is fixedly mounted on the end of the center of gravity adjustment slider 208; The U-shaped frame 205 and the counterweight 204 are distributed on both sides of the center of the test rod 203. There are two center-of-gravity adjustment sliders 208, and the two center-of-gravity adjustment sliders 208 are symmetrically distributed about the center of the inner wire tube 207. The inner walls on both sides of the U-shaped frame 205 are penetrated with straight grooves 2010. The center-of-gravity adjustment sliders 208 are slidably located inside the straight grooves 2010. The weight of the gravity weight 209 is adapted to the weight of the counterweight 204. The top left end and the top right end of the rotating side seat 101 are both fixedly installed with two upper and lower distributed frames 102 through channel steel, and two sleeve shafts 2012 distributed front and back are rotatably installed between the two upper and lower distributed frames 102, wherein the outer walls of the two sleeve shafts 2012 located at the top left end of the detection bed frame 100 are fixedly installed with spur gears 2013, and the left end of the outer wall of the test rod 203 is fixedly installed with an annular gear sleeve 2011, and the annular gear sleeve 2011 is meshed with the two spur gears 2013, and the outer wall of one of the sleeve shafts 2012 is fixedly installed with a pointer 2014, and the pointer 2014 is located at the bottom of the spur gear 2013, wherein a scale plate 2015 is fixedly installed on the surface of a frame 102 located at the top left end of the detection bed frame 100, and the scale plate 2015 is located at the bottom of the pointer 2014, and the position of the pointer 2014 corresponds to the scale position opened at the top of the scale plate 2015; A power motor 600 is fixedly installed at the left end of the bottom of the detection bed frame 100, a driving sheave 601 is fixedly installed on the output shaft of the power motor 600, a driven sheave 602 is fixedly installed on the left end of the outer wall of the driving shaft 201, and at least one V-belt 603 is sleeved between the driving sheave 601 and the driven sheave 602; Specifically, in this embodiment, the CNC machine tool fixture to be tested is fixedly installed on the right side of the connecting plate 202, and the left end of the test rod 203 is clamped by the clamping claw of the CNC machine tool fixture installed on the right end of the connecting plate 202 (as shown in the attached manual). Figure 1 and 2 shown); Start the power motor 600, and drive the active groove wheel 601 to rotate through the output shaft of the power motor 600. The rotation of the active groove wheel 601 drives the driven groove wheel 602, together with the drive shaft 201, the connecting plate 202 and the fixed CNC machine tool fixture to rotate through the V-belt 603. The rotation of the CNC machine tool fixture drives the test rod 203 clamped by it to rotate together. The rotation of the test rod 203 drives the annular gear sleeve 2011 to rotate. It should be noted here that before the power motor 600 is started, it is necessary to apply grease to the surface of the annular gear sleeve 2011 and the spur gear 2013 in advance to avoid friction loss between the annular gear sleeve 2011 and the spur gear 2013, which can improve the annular gear sleeve 2011 and the spur gear 20 13. The service life of the test rod 203 is extended. Since the rotation of the test rod 203 also drives the counterweight block 204 and the counterweight assembly to rotate together, initially, the inner thread tube 207 in the counterweight assembly is located on the periphery of the center of gravity adjustment screw rod 206 close to one end of the test rod 203. In this case, during the rotation of the test rod 203, the overall center of gravity of the counterweight block 204, the counterweight assembly and the test rod 203 is located at the center of the circle of the test rod 203, ensuring that the test rod 203 does not swing during rotation, and the clamping stability of the CNC machine tool fixture is tested. At the same time, the device can rotate the center of gravity adjustment screw rod 206 so that the threaded thrust between the center of gravity adjustment screw rod 206 and the inner thread tube 207 drives the two center of gravity adjustment sliders 208 to move away from each other along the two straight grooves 210. The test rod 203 moves in the same direction, and the two center of gravity adjusting sliders 208 further drive the two gravity weights 209 to move together. At this time, the overall center of gravity of the counterweight assembly, the counterweight block 204 and the test rod 203 deviates from the center of the circle of the test rod 203. Therefore, the test rod 203 becomes unbalanced during rotation, which causes the right end of the test rod 203 to vibrate. By adjusting the moving distance of the inner wire tube 207, the overall center of gravity position of the counterweight assembly, the counterweight block 204 and the test rod 203 can be adjusted, so that during the rotation of the test rod 203, its right end generates vibrations of different amplitudes. The clamping stability of the CNC machine tool fixture can be tested under different vibration intensities, thereby improving the detection range and detection intensity. If the CNC When the clamping force of the machine tool fixture is poor, the vibration of the right end of the test rod 203 will cause the test rod 203 to shift inside the clamp's jaws, and the displacement of the test rod 203 directly drives the annular gear sleeve 2011 to move. The movement of the annular gear sleeve 2011 drives the two spur gears 2013 together with the sleeve shaft 2012 fixedly connected to the spur gear 2013 to rotate. The rotation of one of the sleeve shafts 2012 also drives the pointer 2014 to rotate, causing a deviation between the reference position of the pointer 2014 and the scale 2015. The inspector can know whether the test rod 203 has moved by observing the scale position of the pointer 2014 and the scale 2015, and then judge the clamping stability effect of the CNC machine tool fixture, which is very practical.

[0020] Embodiment 2: The brake component 300 includes a rod 301 slidably inserted at the top of the inner wall of the sleeve shaft 2012 and slidably inserted at the bottom of the inner wall of the sleeve shaft 2012, and a suspension arm 302 is fixedly installed at one end of the outer wall of the rod 301 away from the sleeve shaft 2012, wherein the two suspension arms 302 at the upper and lower positions are symmetrically distributed, and the two suspension arms 302 at the left and right positions are symmetrically distributed, wherein a brake pressure plate 303 is fixedly installed between the left and right suspension arms 302, wherein a plurality of brake strips 304 distributed at equal intervals on the left and right are fixedly installed between the front and rear brake pressure plates 303, and the brake strips 304 are riveted to the surface of the brake pressure plate 303 by rivets, and the brake strips 304 are made of cotton and linen material; Two pulling springs 309 distributed left and right are fixedly installed between the two brake pressure plates 303 in the upper and lower directions, an anti-skid pin 306 is fixedly installed on the end of the outer wall of the insertion rod 301 away from the suspension arm 302, an annular groove 307 is provided on the top and bottom of the sleeve shaft 2012, and a vertical groove 308 is provided on the upper part of the outer wall of the sleeve shaft 2012 and the lower part of the outer wall, and the vertical groove 308 is connected with the annular groove 307, and the groove width of the vertical groove 308 is greater than the diameter of the anti-skid pin 306, and the anti-skid pin 306 is located inside the annular groove 307, and the position of the anti-skid pin 306 does not overlap with the position of the vertical groove 308; The upper part of the outer wall of the sleeve shaft 2012 is fixedly mounted with a rocker arm 400, wherein a pull rod 500 is hingedly connected between the two rocker arms 400 at the left and right positions; Specifically, in the present embodiment, during the CNC machine tool fixture detection process, if the displacement of the test rod 203 is large, the movement of the test rod 203 drives the annular gear sleeve 2011 to move, causing the spur gear 2013 and the sleeve shaft 2012 connected to the spur gear 2013 to rotate. The rotation of the sleeve shaft 2012 drives the two sleeve shafts 2012 located at the right end to rotate through the linkage effect of the left and right rocker arms 400 and the pull rod 500. The rotation of the sleeve shaft 2012 drives the annular groove 307 and the vertical groove 308 to rotate together. When the vertical groove 308 rotates and overlaps with the anti-slip pin 306, the abutment force of the groove wall of the annular groove 307 on the anti-slip pin 306 disappears, and the two tension springs 309 in the compressed state rebound immediately, causing the upper and lower two The brake pressure plate 303 moves toward the middle, and the movement of the brake pressure plate 303 drives the boom 302 to move together. The movement of the boom 302 drives the insertion rod 301 to slide into the interior of the sleeve shaft 2012. The boom 302 further drives the anti-slip pin 306 to slide along the inner wall of the vertical groove 308 until the upper and lower brake pressure plates 303 are against each other, and the brake strips 304 distributed up and down are stretched to cover the periphery of the test rod 203. At the same time, the power motor 600 is powered off, and multiple test rods 203 are tightly wrapped around the periphery of the test rod 203, which can quickly brake the rotating test rod 203, so that it quickly changes from dynamic rotation to static, thereby preventing the test rod 203 from falling off the CNC machine tool fixture, reducing the probability of detection safety accidents, and improving detection safety.

[0021] Embodiment 3: The distance between the inner wall of the frame 102 and the outer wall of the test rod 203 is 50-60 mm, the distance between the outer wall of the test rod 203 and the outer wall of the sleeve shaft 2012 is 50-60 mm, and the distance between the pulling spring 309 and the test rod 203 is 50-60 mm; Specifically, in this embodiment, a gap of 50 to 60 mm is set between the outer wall of the test rod 203 and the support frame 102, the sleeve shaft 2012 and the pulling spring 309. Therefore, during the rotation of the test rod 203, if the right end thereof produces an amplitude swing, it will not cause contact collision with the outer wall of the support frame 102, the outer wall of the sleeve shaft 2012 and the outer wall of the pulling spring 309, thereby avoiding damage to the device.

[0022] Embodiment 4: The annular gear sleeve 2011 is sleeved on the periphery of the test rod 203, and the annular gear sleeve 2011 is fixed to the test rod 203 by fastening bolts; Specifically, the straight groove 2010 is fixedly installed on the outer wall of the test rod 203 by setting fastening bolts, so as to facilitate the adjustment of the position of the annular gear sleeve 2011, thereby facilitating the adjustment of CNC machine tool fixtures with different thickness specifications and improving the adaptability of the device.

[0023] The present invention provides a CNC machine tool fixture stability vibration test device. When working, the CNC machine tool fixture to be tested is fixedly installed on the right side of the connecting plate 202, and the left end of the test rod 203 is clamped by the clamping claw of the CNC machine tool fixture installed on the right end of the connecting plate 202 (as shown in the attached manual). Figure 1 and 2 shown); Start the power motor 600, and drive the active groove wheel 601 to rotate through the output shaft of the power motor 600. The active groove wheel 601 rotates through the V-belt 603 to drive the driven groove wheel 602, the drive shaft 201, the adapter plate 202 and the fixed CNC machine tool fixture to rotate together. The rotation of the CNC machine tool fixture drives the test rod 203 clamped by it to rotate together. The rotation of the test rod 203 drives the annular gear sleeve 2011 to rotate. It should be noted here that before the power motor 600 is started, it is necessary to pre- Apply grease to the surface of the annular gear sleeve 2011 and the spur gear 2013 to avoid friction loss between the annular gear sleeve 2011 and the spur gear 2013, which can increase the service life of the annular gear sleeve 2011 and the spur gear 2013. Since the rotation of the test rod 203 also drives the counterweight block 204 and the counterweight assembly to rotate together, initially, the inner wire tube 207 in the counterweight assembly is located at the outer periphery of the center of gravity adjustment screw rod 206 near one end of the test rod 203. In this case, during the rotation of the test rod 203, the counterweight block 204 and the counterweight assembly are rotated together. The overall center of gravity of the block 204, the counterweight assembly and the test rod 203 is located at the center of the test rod 203, ensuring that the test rod 203 does not swing when rotating, and detecting the clamping stability of the CNC machine tool fixture. At the same time, in this device, the center of gravity adjustment screw rod 206 can be rotated so that the threaded thrust between the center of gravity adjustment screw rod 206 and the inner thread tube 207 drives the two center of gravity adjustment sliders 208 to move along the two straight grooves 2010 in the direction away from the test rod 203, and the two center of gravity adjustment sliders 208 move The two gravity weights 209 are driven to move together in one step. At this time, the overall center of gravity of the counterweight assembly, the counterweight block 204 and the test rod 203 deviates from the center of the circle of the test rod 203. Therefore, the test rod 203 is unbalanced during rotation, which causes the right end of the test rod 203 to vibrate. By adjusting the moving distance of the inner wire tube 207, the overall center of gravity position of the counterweight assembly, the counterweight block 204 and the test rod 203 can be adjusted, so that during the rotation of the test rod 203, its right end generates vibrations of different amplitudes; If the clamping force of the CNC machine tool is not good, the vibration of the right end of the test rod 203 will cause the test rod 203 to shift inside the clamp's jaws, and the shift of the test rod 203 directly drives the annular gear sleeve 2011 to move, and the movement of the annular gear sleeve 2011 drives the two spur gears 2013 together with the sleeve shaft 2012 fixedly connected to the spur gear 2013 to rotate, and the rotation of one of the sleeve shafts 2012 also drives the pointer 214 to rotate, so that the pointer 214 and the scale reference position of the dial 215 deviate. The inspector can know whether the test rod 203 moves by observing the scale position of the pointer 2014 and the dial 2015, and then judge the clamping stability effect of the CNC machine tool clamp; During the inspection of the fixture of the CNC machine tool, if the displacement of the test rod 203 is large, the movement of the test rod 203 drives the annular gear sleeve 2011 to move, causing the spur gear 2013 and the sleeve shaft 2012 connected to the spur gear 2013 to rotate. The rotation of the sleeve shaft 2012 drives the two sleeve shafts 2012 at the right end to rotate through the linkage effect of the left and right rocker arms 400 and the pull rod 500. The rotation of the sleeve shaft 2012 drives the annular groove 307 and the vertical groove 308 to rotate together. When the vertical groove 308 rotates and overlaps with the position of the anti-skid pin 306, the abutment force of the groove wall of the annular groove 307 on the anti-skid pin 306 disappears, and the two tension springs 309 in the compressed state rebound immediately, causing the upper and lower brake pressure plates to rotate. 303 moves toward the middle, the movement of the brake pressure plate 303 drives the boom 302 to move together, the movement of the boom 302 drives the insertion rod 301 to slide into the interior of the sleeve shaft 2012, and the boom 302 further drives the anti-slip pin 306 to slide along the inner wall of the vertical groove 308 until the upper and lower brake pressure plates 303 abut against each other, and the brake strips 304 distributed up and down are stretched to cover the periphery of the test rod 203. At the same time, the power motor 600 is powered off, and multiple test rods 203 are tightly wrapped around the periphery of the test rod 203, which can quickly brake the rotating test rod 203, so that it quickly changes from dynamic rotation to static, thereby preventing the test rod 203 from falling off the CNC machine tool fixture, reducing the probability of detection safety accidents, and improving detection safety.

[0024] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A vibration test device for the stability of a CNC machine tool fixture, comprising a detection bed frame (100), a detection component (200) and a braking component (300), characterized in that: A detection component (200) is provided on the top of the detection bed frame (100); a rotating side seat (101) is fixedly provided on the left end of the top of the detection bed frame (100); a braking component (300) is provided on the top of the detection bed frame (100); and the braking component (300) is located on the right part of the rotating side seat (101); The detection component (200) comprises a driving shaft (201) rotatably mounted inside a rotating side seat (101), a connecting plate (202) being fixedly mounted on the right end of the driving shaft (201), and the detection component (200) further comprises a testing rod (203) located at the right end of the connecting plate (202), a counterweight block (204) and a counterweight assembly being fixedly mounted on the right end of the outer wall of the testing rod (203); The counterweight assembly comprises a U-shaped frame (205) fixedly mounted on the right end of the outer wall of the test rod (203); a center of gravity adjustment screw rod (206) is rotatably mounted inside the U-shaped frame (205); an inner threaded tube (207) is screwed onto the outer thread of the center of gravity adjustment screw rod (206); a center of gravity adjustment slider (208) is fixedly mounted on the outer wall of the inner threaded tube (207); and a gravity weight (209) is fixedly mounted on the end of the center of gravity adjustment slider (208).

2. A CNC machine tool fixture stability vibration test device according to claim 1, characterized in that: The U-shaped frame (205) and the counterweight (204) are distributed on both sides of the center of the test rod (203). There are two center of gravity adjustment sliders (208), and the two center of gravity adjustment sliders (208) are symmetrically distributed about the center of the inner wire tube (207). Straight grooves (2010) are penetrated through the inner walls of both sides of the U-shaped frame (205). The center of gravity adjustment sliders (208) are slidably located inside the straight grooves (2010). The weight of the gravity weight (209) is adapted to the weight of the counterweight (204).

3. A CNC machine tool fixture stability vibration test device according to claim 2, characterized in that: The top left end and the top right end of the rotating side seat (101) are both fixedly mounted with two vertically distributed cantilever frames (102) via channel steel, and two front-to-rear distributed sleeve shafts (2012) are rotatably mounted between the two vertically distributed cantilever frames (102), wherein the outer walls of the two sleeve shafts (2012) located at the top left end of the detection bed frame (100) are both fixedly mounted with spur gears (2013), and the left end of the outer wall of the test rod (203) is fixedly mounted with an annular gear sleeve (2011), and the annular gear sleeve (2011) ) are meshed with two spur gears (2013), a pointer (2014) is fixedly mounted on the outer wall of one of the sleeve shafts (2012), and the pointer (2014) is located at the bottom of the spur gear (2013), and a dial (2015) is fixedly mounted on the surface of one of the cantilever frames (102) located at the top left end of the detection bed frame (100), and the dial (2015) is located at the bottom of the pointer (2014), and the position of the pointer (2014) corresponds to the scale position opened at the top of the dial (2015).

4. A CNC machine tool fixture stability vibration test device according to claim 3, characterized in that: A power motor (600) is fixedly mounted on the left end of the bottom of the detection bed frame (100); a driving groove wheel (601) is fixedly mounted on the output shaft of the power motor (600); a driven groove wheel (602) is fixedly mounted on the left end of the outer wall of the drive shaft (201); and at least one V-belt (603) is sleeved between the driving groove wheel (601) and the driven groove wheel (602).

5. A CNC machine tool fixture stability vibration test device according to claim 4, characterized in that: The brake component (300) comprises an insertion rod (301) slidably inserted into the top of the inner wall of the sleeve shaft (2012) and slidably inserted into the bottom of the inner wall of the sleeve shaft (2012); a suspension arm (302) is fixedly installed at one end of the outer wall of the insertion rod (301) away from the sleeve shaft (2012); the two suspension arms (302) at upper and lower positions are symmetrically distributed, and the two suspension arms (302) at left and right positions are symmetrically distributed; a brake pressure plate (303) is fixedly installed between the left and right suspension arms (302); and a plurality of brake strips (304) distributed at equal intervals on the left and right are fixedly installed between the front and rear brake pressure plates (303).

6. A CNC machine tool fixture stability vibration test device according to claim 5, characterized in that: The brake strip (304) is riveted to the surface of the brake pressure plate (303) by means of rivets, and the brake strip (304) is made of cotton and linen material.

7. A CNC machine tool fixture stability vibration test device according to claim 6, characterized in that: Two pulling springs (309) distributed left and right are fixedly installed between the two brake pressure plates (303) in the upper and lower directions; an anti-slip pin (306) is fixedly installed on the end of the outer wall of the insertion rod (301) away from the suspension arm (302); an annular groove (307) is provided at the top and bottom of the sleeve shaft (2012); a vertical groove (308) is provided at the upper part of the outer wall of the sleeve shaft (2012) and the lower part of the outer wall; the vertical groove (308) is connected to the annular groove (307); the groove width of the vertical groove (308) is greater than the diameter of the anti-slip pin (306); the anti-slip pin (306) is located inside the annular groove (307); and the position of the anti-slip pin (306) does not overlap with the position of the vertical groove (308).

8. A CNC machine tool fixture stability vibration test device according to claim 7, characterized in that: A rocker arm (400) is fixedly mounted on the upper portion of the outer wall of the sleeve shaft (2012), wherein a pull rod (500) is hingedly connected between two rocker arms (400) at left and right positions.

9. A CNC machine tool fixture stability vibration test device according to claim 8, characterized in that: The distance between the inner wall of the support frame (102) and the outer wall of the test rod (203) is 50 to 60 mm, the distance between the outer wall of the test rod (203) and the outer wall of the sleeve shaft (2012) is 50 to 60 mm, and the distance between the pulling spring (309) and the test rod (203) is 50 to 60 mm.

10. A CNC machine tool fixture stability vibration test device according to claim 9, characterized in that: The annular gear sleeve (2011) is sleeved on the periphery of the test rod (203), and the annular gear sleeve (2011) is fixed to the test rod (203) via fastening bolts.

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