CN116256132A - Device and method for measuring three-dimensional static stiffness of numerically controlled lathe - Google Patents
Device and method for measuring three-dimensional static stiffness of numerically controlled lathe Download PDFInfo
- Publication number
- CN116256132A CN116256132A CN202310146072.6A CN202310146072A CN116256132A CN 116256132 A CN116256132 A CN 116256132A CN 202310146072 A CN202310146072 A CN 202310146072A CN 116256132 A CN116256132 A CN 116256132A
- Authority
- CN
- China
- Prior art keywords
- adjusting screw
- static stiffness
- pressure sensor
- measuring
- tool rest
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Machine Tool Sensing Apparatuses (AREA)
Abstract
The invention discloses a three-dimensional static stiffness measurement device of a numerical control lathe, which belongs to the field of numerical control lathes, wherein a first adjusting screw is arranged on a first pressure sensor and transmits force to the first pressure sensor, a second adjusting screw is arranged on a second pressure sensor and transmits force to the second pressure sensor, a third adjusting screw is arranged on a third pressure sensor and transmits force to the third pressure sensor, the first adjusting screw is positioned at the top of the three-dimensional static stiffness measurement device of the numerical control lathe, the third adjusting screw is positioned at the bottom of the three-dimensional static stiffness measurement device of the numerical control lathe, the first adjusting screw and the third adjusting screw are mutually parallel, a first measuring component can measure X-direction static stiffness, a third measuring component can measure Y-direction static stiffness, and a second measuring component can measure Z-direction static stiffness. The invention also relates to a method for measuring the three-dimensional static stiffness of the numerical control lathe by adopting the device for measuring the three-dimensional static stiffness of the numerical control lathe.
Description
Technical Field
The invention relates to the field of numerical control machine tools, in particular to a device and a method for measuring three-dimensional static stiffness of a numerical control lathe.
Background
Stiffness refers to the ability of a material or structure to resist elastic deformation when subjected to a force. The lathe rigidity refers to the capability of deformation of a part on which a cutter is mounted and a part on which a workpiece is mounted on the lathe under the action of external force, and is one of main indexes for evaluating the working performance of the lathe. The rigidity of the lathe in different states is different, and the rigidity of the lathe in dynamic state is dynamic rigidity, which is called dynamic rigidity for short; the rigidity expressed in the static state is static rigidity, which is simply called static rigidity.
With the wide application of high-precision machining, the requirements on the static rigidity performance of the lathe are higher and higher, the static rigidity of the lathe is an important factor for ensuring the geometric precision of the lathe, and meanwhile, the geometric precision of the lathe directly influences the precision of machined parts of the lathe.
The traditional static stiffness measuring device can only measure the static stiffness of the numerically controlled lathe X, Z, but can not measure the static stiffness of the Y direction; and when the traditional static stiffness measuring device measures static stiffness of different parts and directions, the clamping mode needs to be changed, the sensor is disassembled, the operation is complex, and the efficiency is low.
Disclosure of Invention
In order to overcome the defects of the prior art, one of the purposes of the invention is to provide a three-dimensional static stiffness measuring device of a numerical control lathe, which can measure the static stiffness of the numerical control lathe X, Y, Z in the direction and does not need to be disassembled when measuring the static stiffness of different parts and different directions.
In order to overcome the defects of the prior art, the second aim of the invention is to provide a three-dimensional static stiffness measuring method of a numerical control lathe, which can measure the static stiffness of the numerical control lathe X, Y, Z in the direction and does not need to be disassembled when measuring the static stiffness of different parts and different directions.
One of the purposes of the invention is realized by adopting the following technical scheme:
the utility model provides a numerical control lathe three-dimensional static stiffness measuring device, includes axle bed, first measuring subassembly, second measuring subassembly and third measuring subassembly, first measuring subassembly second measuring subassembly and third measuring subassembly install respectively in the axle bed, first measuring subassembly includes first pressure sensor and first adjusting screw, first adjusting screw install in first pressure sensor and with force transfer to first pressure sensor, second measuring subassembly includes second pressure sensor and second adjusting screw, second adjusting screw install in second pressure sensor and with force transfer to second pressure sensor, third measuring subassembly includes third pressure sensor and third adjusting screw, third adjusting screw install in third pressure sensor and with force transfer to third pressure sensor, first adjusting screw is located numerical control lathe three-dimensional static stiffness measuring device's top, third adjusting screw is located numerical control lathe three-dimensional static stiffness measuring device's bottom, first adjusting screw and third measuring screw are located X can measure the rigidity mutually perpendicular to the second measuring screw can the second measuring screw the third measuring subassembly, the third adjusting screw is located X can measure the rigidity to the numerical control lathe three-dimensional static stiffness measuring device's top.
Further, the three-dimensional static stiffness measuring device of the numerically controlled lathe further comprises a driving piece, the driving piece is in transmission connection with the shaft seat, and the driving piece drives the third measuring assembly to rotate through the shaft seat, so that the third measuring assembly measures the Y-direction static stiffness.
Further, the three-dimensional static stiffness measuring device of the numerically controlled lathe further comprises a connecting block, the connecting block is fixed on the shaft seat, and the third measuring assembly is installed on the connecting block.
Further, the cross section of the connecting block is L-shaped.
Further, the second measurement assembly is detachably mounted to the axle seat.
Further, the second measuring assembly further comprises a mounting seat, the second pressure sensor is fixed on the mounting seat, the three-dimensional static stiffness measuring device of the numerically controlled lathe further comprises a screw, the end part of the mounting seat is at least partially sleeved on the shaft seat, the screw is in threaded connection with the shaft seat, and the end part of the screw is in butt joint with the mounting seat, so that the second measuring assembly is detachably mounted on the shaft seat.
The second purpose of the invention is realized by adopting the following technical scheme:
the method for measuring the three-dimensional static stiffness of the numerically controlled lathe by adopting the device for measuring the three-dimensional static stiffness of the numerically controlled lathe comprises the following steps of:
assembling equipment: assembling a three-dimensional static stiffness measuring device of the numerically controlled lathe, clamping the outer circle of the shaft seat by using a lathe chuck, calculating the static stiffness by a formula K=F/mu, wherein K represents a static stiffness value F represents a loading force mu and represents a deformation;
z-direction static stiffness measurement of the tool rest: the second adjusting screw is rotated by using a spanner to adjust the second pressure sensor to avoid stress, the dial gauge seat is sucked on the cutter frame shell, the dial gauge is beaten on the end face of the cutter head to adjust the gauge needle to be 0, the second adjusting screw is rotated by using the spanner to finish stress loading, and the Z-direction static stiffness of the cutter frame is calculated according to the display pressure value of the second pressure sensor and the reading of the dial gauge by the formula K=F/mu;
and measuring X-direction static stiffness of the tool rest: the first adjusting screw is rotated by using a spanner to adjust the first pressure sensor to avoid stress, the dial gauge seat is sucked on the tool rest shell, the dial gauge is arranged on the boring tool mounting surface of the tool rest, the first adjusting screw is rotated by using the spanner to finish stress loading, and the X-direction static stiffness of the tool rest is calculated according to the display pressure value of the first pressure sensor and the reading of the dial gauge by the formula K=F/mu;
and (3) measuring the Y-direction static rigidity of the tool rest: the driving piece drives the third measuring assembly to rotate 90 degrees through the shaft seat, the axis of the third pressure sensor is parallel to the Y axis, the tool rest is slowly moved by adopting the hand wheel to enable the tool rest to be close to the third pressure sensor on the shaft seat, at the moment, a certain distance is reserved between the third adjusting screw and the tool rest, the third adjusting screw is rotated to enable the third adjusting screw to prop against the tool rest, the device is prevented from rotating, the dial indicator gauge seat is sucked on the tool rest shell, the dial indicator is beaten on the tool rest lathe tool installation surface, the wrench is used for rotating the third adjusting screw to finish stress loading, and the static stiffness of the tool rest in the Y direction is calculated according to the formula K=F/. Mu.
Further, the method also comprises a main shaft axial static stiffness measuring step, wherein the main shaft axial static stiffness measuring step specifically comprises the following steps: and (3) slowly moving a Z axis of the machine tool by adopting a hand wheel, enabling a tool apron of the tool rest to be close to a second adjusting screw on a second pressure sensor, sucking a gauge needle on a guide rail of the machine tool body by a dial gauge seat, pressing the gauge needle on the end face of a chuck, adjusting the gauge needle to be 0', rotating the second adjusting screw by using a spanner to finish stress loading, and calculating the axial static stiffness of the spindle according to a formula K=F/mu according to a display pressure value of the second pressure sensor and a reading of the dial gauge.
Further, the method also comprises a main shaft radial static stiffness measuring step, wherein the main shaft radial static stiffness measuring step specifically comprises the following steps: the tool rest is moved by using a hand wheel feeding mode, so that a tool apron is close to a first adjusting screw on a first pressure sensor of a shaft seat, a dial indicator seat is sucked on a guide rail of a machine tool body, a dial indicator is beaten on a root outer circle measuring point of the shaft seat, a spanner is used for rotating the first adjusting screw to finish stress loading, and the radial static rigidity of a main shaft is calculated according to a formula K=F/mu according to a pressure value displayed by the first pressure sensor and a dial indicator reading
Further, the method also comprises a tailstock axial static stiffness measurement step and a tailstock radial static stiffness measurement step, wherein the tailstock axial static stiffness measurement step specifically comprises the following steps: the second measuring assembly is detached from the shaft seat, a second pressure sensor is installed in a boring tool hole of the tool rest and faces the tailstock, the tailstock is locked, the tool rest is moved to enable a second adjusting screw to be close to the end face of the tailstock, a dial indicator seat is sucked on a machine tool guide rail, the dial indicator is beaten on the flange section of the tailstock, a spanner is used for rotating the second adjusting screw to finish stress loading, and axial static rigidity of the tailstock is calculated according to a formula K=F/mu according to a display pressure value of the second pressure sensor and a dial indicator reading; the tailstock radial static stiffness measurement step specifically comprises the following steps: and (3) removing the second measuring assembly from the shaft seat, propping the center of the tailstock against a center hole in the shaft seat, locking the tailstock, moving the tool rest in a manner of feeding by using a hand wheel, enabling the tool apron to be close to a second adjusting screw on the mounting seat, sucking the dial indicator seat on a guide rail of the machine tool body, beating the dial indicator on the side surface of a flange of the tailstock, rotating the second adjusting screw by using a wrench to finish stress loading, and calculating according to a formula K=F/mu, wherein the pressure value is displayed by the second pressure sensor, and the reading of the dial indicator is calculated to obtain the radial static stiffness of the tailstock.
Compared with the prior art, the three-dimensional static stiffness measuring device of the numerical control lathe has the following advantages that;
(1) A third measuring component capable of measuring the static stiffness in the Y direction is arranged, and the static stiffness in the Y direction of the tool rest is measured by rotating the angle of the third measuring component;
(2) The static rigidity measuring device can avoid dismantling the pressure relief force sensor: three pressure sensors are arranged on the test tool and are respectively used for measuring the rigidity in three directions;
(3) The second measuring assembly is detachably connected with the shaft seat, the tail frame center can extend into the tool center hole after the shaft seat is detached, so that the radial rigidity of the tail frame is measured, and the detachable shaft seat can be inserted into the boring cutter seat, so that the axial rigidity of the tail frame is measured;
(4) The length of the adjusting screw for applying the load can be adjusted, and the measuring device is suitable for measuring different specifications of machine types;
(5) The connecting block for Y-direction measurement is made of aluminum alloy materials, so that the overall weight of the measuring device is reduced, and the use of operators is facilitated.
Drawings
FIG. 1 is a perspective view of a three-dimensional static stiffness measuring device of a numerical control lathe;
FIG. 2 is a front view of the three-dimensional static stiffness measuring device of the numerically controlled lathe of FIG. 1;
fig. 3 is a cross-sectional view of the three-dimensional static stiffness measuring device of the numerically controlled lathe of fig. 1.
In the figure: 10. a shaft seat; 20. a first measurement assembly; 21. a first pressure sensor; 22. a first fixing member; 23. a first adjusting screw; 30. a second measurement assembly; 31. a mounting base; 32. a second pressure sensor; 33. a second fastener; 34. a second adjusting screw; 40. a screw; 50. a connecting block; 60. a third measurement assembly; 61. a third pressure sensor; 62. a third fastener; 63. and a third adjusting screw.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or be present as another intermediate element through which the element is fixed. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Fig. 1 to 3 show a three-dimensional static stiffness measuring device of a numerically controlled lathe according to the present invention, which comprises a driving member, a shaft seat 10, a first measuring assembly 20, a second measuring assembly 30, a screw 40, a connecting block 50 and a third measuring assembly 60.
The drive member is used to drive the third measuring assembly 60 in rotation to sense the Y-direction (radial) static stiffness of the tool holder. Specifically, the driving member is a motor.
The shaft seat 10 is in transmission connection with a driving piece. The axle seat 10 is used for mounting a first measuring assembly 20, a second measuring assembly 30 and a third measuring assembly 60.
The first measuring assembly 20 is installed on the top of the shaft seat 10, and the first measuring assembly 20 is used for detecting the X-direction static stiffness of the tool rest. The first measuring assembly 20 comprises a first pressure sensor 21, a plurality of first fixtures 22 and a first adjusting screw 23. The first pressure sensor 21 is fixed to the shaft seat 10 by a plurality of first fixing members 22. Specifically, the first fixing members 22 are screws, and the plurality of first fixing members 22 are annularly disposed on the first pressure sensor 21. The first adjusting screw 23 is rotatably mounted to the first pressure sensor 21 and transmits the received force to the first pressure sensor 21. Specifically, the first adjusting screw 23 is screwed with the first pressure sensor 21. The axis of the first adjusting screw 23 is perpendicular to the horizontal plane.
The second measurement assembly 30 is removably mounted to the end of the axle seat 10. The second measuring assembly 30 is used to detect the Z-directed static stiffness of the tool holder. The second measurement assembly 30 includes a mount 31, a second pressure sensor 32, a second fastener 33, and a second adjustment screw 34. The end of the mounting seat 31 is at least partially sleeved inside the end of the shaft seat 10, and the screw 40 is in threaded connection with the shaft seat 10 and is abutted with the mounting seat 31, so that the mounting seat 31 is detachably mounted on the shaft seat 10, and the dismounting and the mounting are convenient. The second pressure sensor 32 is fixed to the mount 31 by a second fastener 33. Specifically, the second fastening members 33 are screws, and the plurality of second fastening members 33 are annularly disposed on the second pressure sensor 32. The second adjusting screw 34 is rotatably mounted to the second pressure sensor 32 and transmits the received force to the second pressure sensor 32. Specifically, the second adjusting screw 34 is threadedly coupled to the second pressure sensor 32. The axis of the second adjusting screw 34 is parallel to the horizontal plane.
The screw 40 is used to fix the second measuring assembly 30, so that the second measuring assembly 30 is detachably mounted on the end of the shaft seat 10.
The connection block 50 is fixed to the bottom of the shaft seat 10. The connecting block 50 is made of aluminum alloy materials, so that the overall weight of the measuring device is reduced, and the measuring device is convenient for operators to use. Specifically, the cross section of the connection block 50 is L-shaped.
The third measurement assembly 60 includes a third pressure sensor 61, a plurality of third fasteners 62, and a third adjustment screw 63. The third pressure sensor 61 is fixed to the connection block 50 by a plurality of third fasteners 62. Specifically, the third fastening members 62 are screws, and a plurality of third fastening members 62 are annularly disposed on the third pressure sensor 61. The third adjusting screw 63 is rotatably mounted to the third pressure sensor 61 and transmits the received force to the third pressure sensor 61. Specifically, the third adjusting screw 63 is screwed with the third pressure sensor 61. The axis of the third adjusting screw 63 is perpendicular to the horizontal plane and parallel to the axis of the first adjusting screw 23.
When the three-dimensional static stiffness measuring device of the numerically controlled lathe is used, firstly, the three-dimensional static stiffness measuring device of the numerically controlled lathe is assembled, the lathe chuck is used for clamping the outer circle of the shaft seat 10, the static stiffness is calculated by the formula K=F/mu, K represents the static stiffness value F represents the loading force mu and represents the deformation quantity; the second adjusting screw 4034 is rotated by using a spanner to adjust the second pressure sensor 32 to be unstressed, the dial gauge seat is sucked on the cutter frame shell, the dial gauge is beaten on the cutter head end face to adjust the gauge needle to be 0, the second adjusting screw 34 is rotated by using the spanner to finish stress loading, and the Z-direction static stiffness of the cutter frame is calculated according to the display pressure value of the second pressure sensor and the reading of the dial gauge by the formula K=F/mu; the first adjusting screw 23 is rotated by using a spanner to adjust the first pressure sensor 21 to be unstressed, a dial gauge seat is sucked on the tool rest shell, a dial gauge is arranged on the boring tool mounting surface of the tool rest, the first adjusting screw 23 is rotated by using the spanner to finish stress loading, and the X-direction static stiffness of the tool rest is calculated according to the formula K=F/mu according to the display pressure value of the first pressure sensor 21 and the reading of the dial gauge; the driving piece drives the third measuring component 60 to rotate 90 degrees through the shaft seat 10, the axis of the third pressure sensor 61 is parallel to the Y axis, the tool rest is slowly moved by adopting the hand wheel to enable the tool rest to be close to the third pressure sensor 61 on the shaft seat 10, at the moment, a certain distance is reserved between the third adjusting screw 63 and the tool rest, the third adjusting screw 63 is rotated to enable the third adjusting screw 63 to prop against the tool rest, the device is prevented from rotating, the dial indicator seat is sucked on the tool rest shell, the dial indicator is beaten on the tool rest lathe tool mounting surface, the wrench is used for rotating the third adjusting screw 63 to finish stress loading, and the static stiffness of the tool rest in the Y direction is calculated according to the formula K=F/mu according to the pressure value displayed by the third pressure sensor 61 and the dial indicator reading. And the Z axis of the machine tool is slowly moved by adopting a hand wheel, so that a tool apron of the tool rest is close to a second adjusting screw 34 on a second pressure sensor 32, a dial gauge stand sucks a gauge needle on a guide rail of the machine tool body and presses the gauge needle on the end surface of a chuck to adjust the gauge needle to be 0, a spanner is used for rotating the second adjusting screw 34 to finish stress loading, and the axial static stiffness of the spindle is calculated according to a formula K=F/mu according to a pressure value displayed by the second pressure sensor 32 and a dial gauge reading. The tool rest is moved by using a hand wheel feeding mode, so that the tool apron is close to a first adjusting screw 23 on a first pressure sensor 21 of the shaft seat 10, a dial indicator seat is sucked on a machine tool body guide rail, the dial indicator is beaten on a root outer circle measuring point of the shaft seat 10, a spanner is used for rotating the first adjusting screw 23 to finish stress loading, and the radial static rigidity of the spindle is calculated according to the formula K=F/mu according to the display pressure value of the first pressure sensor 21 and the reading of the dial indicator.
The second measuring assembly 30 is detached from the shaft seat 10, a second pressure sensor 32 is installed in a boring tool hole of the tool rest and faces the tailstock, the tailstock is locked, the tool rest is moved to enable a second adjusting screw 34 to be close to the end face of the tailstock, a dial indicator seat is sucked on a machine tool guide rail, a dial indicator is beaten on the flange section of the tailstock, a spanner is used for rotating the second adjusting screw 34 to finish stress loading, and the axial static rigidity of the tailstock is calculated according to the formula K=F/mu according to the display pressure value of the second pressure sensor 32 and the reading of the dial indicator; the tailstock radial static stiffness measurement step specifically comprises the following steps: the second measuring assembly 30 is detached from the shaft seat 10, the center of the tailstock is propped against a center hole in the shaft seat 10, the tailstock is locked to move the tool rest in a manner of feeding by using a hand wheel, the tool apron is close to a second adjusting screw 4034 on the mounting seat 31, the dial indicator seat is absorbed on a guide rail of the machine tool body, the dial indicator is beaten on the side surface of a flange of the tailstock, the second adjusting screw 34 is rotated by using a spanner to finish stress loading, and the radial static stiffness of the tailstock is obtained by calculating according to a formula K=F/mu according to a pressure value displayed by the second pressure sensor 32 and a dial indicator reading.
The application also relates to a method for measuring the three-dimensional static stiffness of the numerical control lathe, which is implemented by adopting the device for measuring the three-dimensional static stiffness of the numerical control lathe, and comprises the following steps:
assembling equipment: assembling a three-dimensional static stiffness measuring device of the numerically controlled lathe, clamping the outer circle of the shaft seat 10 by using a lathe chuck, calculating the static stiffness by a formula K=F/mu, wherein K represents a static stiffness value F represents a loading force mu represents a deformation;
z-direction static stiffness measurement of the tool rest: the second adjusting screw 34 is rotated by using a spanner to adjust the second pressure sensor 32 to be unstressed, the dial gauge seat is sucked on the cutter frame shell, the dial gauge is beaten on the end face of the cutter head to adjust the gauge needle to be 0, the second adjusting screw 34 is rotated by using the spanner to finish stress loading, and the Z-direction static stiffness of the cutter frame is calculated according to the display pressure value of the second pressure sensor and the reading of the dial gauge by the formula K=F/mu;
and measuring X-direction static stiffness of the tool rest: the first adjusting screw 23 is rotated by using a spanner to adjust the first pressure sensor 21 to be unstressed, a dial gauge seat is sucked on the tool rest shell, a dial gauge is arranged on the boring tool mounting surface of the tool rest, the first adjusting screw 23 is rotated by using the spanner to finish stress loading, and the X-direction static stiffness of the tool rest is calculated according to the formula K=F/mu according to the display pressure value of the first pressure sensor 21 and the reading of the dial gauge;
and (3) measuring the Y-direction static rigidity of the tool rest: the driving piece drives the third measuring assembly 60 to rotate 90 degrees through the shaft seat 10, the axis of the third pressure sensor 61 is parallel to the Y axis, the tool rest is slowly moved by adopting the hand wheel to enable the tool rest to be close to the third pressure sensor 61 on the shaft seat 10, at the moment, a certain distance is reserved between the third adjusting screw 6340 and the tool rest, the third adjusting screw 63 is rotated to enable the third adjusting screw 63 to prop against the tool rest, the device is prevented from rotating, the dial indicator seat is sucked on the tool rest shell, the dial indicator is beaten on the tool rest lathe tool mounting surface, the wrench is used for rotating the third adjusting screw 63 to finish stress loading, and the static stiffness of the tool rest in the Y direction is calculated according to the formula K=F/mu according to the pressure value displayed by the third pressure sensor 61 and the dial indicator reading.
Further, the method also comprises a main shaft axial static stiffness measuring step, wherein the main shaft axial static stiffness measuring step specifically comprises the following steps: and the Z axis of the machine tool is slowly moved by adopting a hand wheel, so that a tool apron of the tool rest is close to a second adjusting screw 34 on a second pressure sensor 32, a dial gauge stand sucks a gauge needle on a guide rail of the machine tool body and presses the gauge needle on the end surface of a chuck to adjust the gauge needle to be 0, a spanner is used for rotating the second adjusting screw 34 to finish stress loading, and the axial static stiffness of the spindle is calculated according to a formula K=F/mu according to a pressure value displayed by the second pressure sensor 32 and a dial gauge reading.
Further, the method also comprises a main shaft radial static stiffness measuring step, wherein the main shaft radial static stiffness measuring step specifically comprises the following steps: the tool rest is moved by using a hand wheel feeding mode, so that the tool rest is close to a first adjusting screw 23 on a first pressure sensor 21 of the shaft seat 10, a dial gauge seat is sucked on a machine tool body guide rail, a dial gauge is beaten on a root outer circle measuring point of the shaft seat 10, a spanner is used for rotating the first adjusting screw 23 to finish stress loading, and the radial static rigidity of the spindle is calculated according to the formula K=F/mu according to the display pressure value of the first pressure sensor 21 and the reading of the dial gauge
Further, the method also comprises a tailstock axial static stiffness measurement step and a tailstock radial static stiffness measurement step, wherein the tailstock axial static stiffness measurement step specifically comprises the following steps: the second measuring assembly 30 is detached from the shaft seat 10, a second pressure sensor 32 is installed in a boring tool hole of the tool rest and faces the tailstock, the tailstock is locked, the tool rest is moved to enable a second adjusting screw 34 to be close to the end face of the tailstock, a dial indicator seat is sucked on a machine tool guide rail, a dial indicator is beaten on the flange section of the tailstock, a spanner is used for rotating the second adjusting screw 34 to finish stress loading, and the axial static rigidity of the tailstock is calculated according to the formula K=F/mu according to the display pressure value of the second pressure sensor 32 and the reading of the dial indicator; the tailstock radial static stiffness measurement step specifically comprises the following steps: the second measuring assembly 30 is detached from the shaft seat 10, the center of the tailstock is propped against a center hole in the shaft seat 10, the tailstock is locked to move the tool rest in a manner of feeding by using a hand wheel, the tool apron is close to a second adjusting screw 34 on the mounting seat 31, the dial indicator seat is sucked on a guide rail of the machine tool body, the dial indicator is beaten on the side surface of a flange of the tailstock, the second adjusting screw 4034 is rotated by using a wrench to finish stress loading, and the radial static stiffness of the tailstock is obtained by calculating according to a formula K=F/mu according to a pressure value displayed by the second pressure sensor 32 and a dial indicator reading.
Compared with the prior art, the three-dimensional static stiffness measuring device of the numerical control lathe has the following advantages that;
(1) A third measuring component 60 capable of measuring the static stiffness in the Y direction is arranged, and the static stiffness in the Y direction of the tool rest is measured by rotating the third measuring component 60 to an angle;
(2) The static rigidity measuring device can avoid dismantling the pressure relief force sensor: three pressure sensors are arranged on the test tool and are respectively used for measuring the rigidity in three directions;
(3) The second measuring assembly 30 is detachably connected with the shaft seat 10, the tail frame center can extend into the tool center hole after the shaft seat 10 is detached, so that the radial rigidity of the tail frame is measured, and the detachable shaft seat 10 can be inserted into the boring cutter seat, so that the axial rigidity of the tail frame is measured;
(4) The length of the adjusting screw for applying the load can be adjusted, and the measuring device is suitable for measuring different specifications of machine types;
(5) The connecting block 50 for Y-direction measurement is made of aluminum alloy materials, so that the overall weight of the measuring device is reduced, and the use of operators is facilitated.
The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, it is possible to make several modifications and improvements without departing from the concept of the present invention, which are equivalent to the above embodiments according to the essential technology of the present invention, and these are all included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a numerical control lathe three-dimensional static rigidity measuring device, includes axle bed, its characterized in that: still include first measurement subassembly, second measurement subassembly and third measurement subassembly, first measurement subassembly second measurement subassembly and third measurement subassembly install respectively in the axle bed, first measurement subassembly includes first pressure sensor and first adjusting screw, first adjusting screw install in first pressure sensor and with force transfer extremely first pressure sensor, second measurement subassembly includes second pressure sensor and second adjusting screw, second adjusting screw install in second pressure sensor and with force transfer extremely second pressure sensor, third measurement subassembly includes third pressure sensor and third adjusting screw, third adjusting screw install in third pressure sensor and with force transfer extremely third pressure sensor, first adjusting screw is located the top of numerical control lathe static rigidity measuring device, third adjusting screw is located the bottom of numerical control three-way static rigidity measuring device, first adjusting screw with third adjusting screw includes second pressure sensor and second adjusting screw, third adjusting screw is located X can measure the X can the measurement rigidity to the end, the third can the measurement subassembly is located X can the vertical to the third adjusting screw.
2. The numerical control lathe three-dimensional static stiffness measurement device according to claim 1, wherein: the three-dimensional static stiffness measuring device of the numerically controlled lathe further comprises a driving piece, wherein the driving piece is in transmission connection with the shaft seat, and the driving piece drives the third measuring assembly to rotate through the shaft seat so that the third measuring assembly measures Y-direction static stiffness.
3. The numerical control lathe three-dimensional static stiffness measurement device according to claim 1, wherein: the three-dimensional static stiffness measuring device of the numerically controlled lathe further comprises a connecting block, the connecting block is fixed on the shaft seat, and the third measuring assembly is installed on the connecting block.
4. The numerical control lathe three-dimensional static stiffness measurement device according to claim 3, wherein: the cross section of the connecting block is L-shaped.
5. The numerical control lathe three-dimensional static stiffness measurement device according to claim 1, wherein: the second measuring assembly is detachably mounted on the shaft seat.
6. The numerical control lathe three-dimensional static stiffness measurement device according to claim 5, wherein: the second measuring assembly further comprises a mounting seat, the second pressure sensor is fixed on the mounting seat, the three-dimensional static stiffness measuring device of the numerically controlled lathe further comprises a screw, the end part of the mounting seat is at least partially sleeved on the shaft seat, the screw is in threaded connection with the shaft seat, and the end part of the screw is in butt joint with the mounting seat, so that the second measuring assembly is detachably mounted on the shaft seat.
7. A method for measuring three-dimensional static stiffness of a numerically controlled lathe by adopting the device for measuring three-dimensional static stiffness of the numerically controlled lathe according to any one of claims 1 to 6, which is characterized by comprising the following steps:
assembling equipment: assembling a three-dimensional static stiffness measuring device of the numerically controlled lathe, clamping the outer circle of the shaft seat by using a lathe chuck, calculating the static stiffness by a formula K=F/mu, wherein K represents a static stiffness value F represents a loading force mu and represents a deformation;
z-direction static stiffness measurement of the tool rest: the second adjusting screw is rotated by using a spanner to adjust the second pressure sensor to avoid stress, the dial gauge seat is sucked on the cutter frame shell, the dial gauge is beaten on the end face of the cutter head to adjust the gauge needle to be 0, the second adjusting screw is rotated by using the spanner to finish stress loading, and the Z-direction static stiffness of the cutter frame is calculated according to the display pressure value of the second pressure sensor and the reading of the dial gauge by the formula K=F/mu;
and measuring X-direction static stiffness of the tool rest: the first adjusting screw is rotated by using a spanner to adjust the first pressure sensor to avoid stress, the dial gauge seat is sucked on the tool rest shell, the dial gauge is arranged on the boring tool mounting surface of the tool rest, the first adjusting screw is rotated by using the spanner to finish stress loading, and the X-direction static stiffness of the tool rest is calculated according to the display pressure value of the first pressure sensor and the reading of the dial gauge by the formula K=F/mu;
and (3) measuring the Y-direction static rigidity of the tool rest: the driving piece drives the third measuring assembly to rotate 90 degrees through the shaft seat, the axis of the third pressure sensor is parallel to the Y axis, the tool rest is slowly moved by adopting the hand wheel to enable the tool rest to be close to the third pressure sensor on the shaft seat, at the moment, a certain distance is reserved between the third adjusting screw and the tool rest, the third adjusting screw is rotated to enable the third adjusting screw to prop against the tool rest, the device is prevented from rotating, the dial indicator gauge seat is sucked on the tool rest shell, the dial indicator is beaten on the tool rest lathe tool installation surface, the wrench is used for rotating the third adjusting screw to finish stress loading, and the static stiffness of the tool rest in the Y direction is calculated according to the formula K=F/. Mu.
8. The method for measuring the three-dimensional static stiffness of the numerically controlled lathe according to claim 7, wherein the method comprises the following steps of: the method also comprises a main shaft axial static stiffness measurement step, wherein the main shaft axial static stiffness measurement step specifically comprises the following steps: and (3) slowly moving a Z axis of the machine tool by adopting a hand wheel, enabling a tool apron of the tool rest to be close to a second adjusting screw on a second pressure sensor, sucking a gauge needle on a guide rail of the machine tool body by a dial gauge seat, pressing the gauge needle on the end face of a chuck, adjusting the gauge needle to be 0', rotating the second adjusting screw by using a spanner to finish stress loading, and calculating the axial static stiffness of the spindle according to a formula K=F/mu according to a display pressure value of the second pressure sensor and a reading of the dial gauge.
9. The method for measuring the three-dimensional static stiffness of the numerically controlled lathe according to claim 7, wherein the method comprises the following steps of: the method also comprises a main shaft radial static stiffness measurement step, wherein the main shaft radial static stiffness measurement step specifically comprises the following steps: and moving the tool rest in a manner of feeding by using a hand wheel, so that the tool apron is close to a first adjusting screw on a first pressure sensor of the shaft seat, a dial indicator seat is sucked on a guide rail of the machine tool body, a dial indicator is beaten on a measuring point of the root outer circle of the shaft seat, the first adjusting screw is rotated by using a spanner to finish stress loading, and the radial static stiffness of the spindle is calculated according to a formula K=F/mu according to a display pressure value of the first pressure sensor and a reading of the dial indicator.
10. The method for measuring the three-dimensional static stiffness of the numerically controlled lathe according to claim 7, wherein the method comprises the following steps of: the method also comprises a tailstock axial static stiffness measurement step and a tailstock radial static stiffness measurement step, wherein the tailstock axial static stiffness measurement step specifically comprises the following steps: the second measuring assembly is detached from the shaft seat, a second pressure sensor is installed in a boring tool hole of the tool rest and faces the tailstock, the tailstock is locked, the tool rest is moved to enable a second adjusting screw to be close to the end face of the tailstock, a dial indicator seat is sucked on a machine tool guide rail, the dial indicator is beaten on the flange section of the tailstock, a spanner is used for rotating the second adjusting screw to finish stress loading, and axial static rigidity of the tailstock is calculated according to a formula K=F/mu according to a display pressure value of the second pressure sensor and a dial indicator reading; the tailstock radial static stiffness measurement step specifically comprises the following steps: and (3) removing the second measuring assembly from the shaft seat, propping the center of the tailstock against a center hole in the shaft seat, locking the tailstock, moving the tool rest in a manner of feeding by using a hand wheel, enabling the tool apron to be close to a second adjusting screw on the mounting seat, sucking the dial indicator seat on a guide rail of the machine tool body, beating the dial indicator on the side surface of a flange of the tailstock, rotating the second adjusting screw by using a wrench to finish stress loading, and calculating according to a formula K=F/mu, wherein the pressure value is displayed by the second pressure sensor, and the reading of the dial indicator is calculated to obtain the radial static stiffness of the tailstock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310146072.6A CN116256132A (en) | 2023-02-21 | 2023-02-21 | Device and method for measuring three-dimensional static stiffness of numerically controlled lathe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310146072.6A CN116256132A (en) | 2023-02-21 | 2023-02-21 | Device and method for measuring three-dimensional static stiffness of numerically controlled lathe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116256132A true CN116256132A (en) | 2023-06-13 |
Family
ID=86680531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310146072.6A Pending CN116256132A (en) | 2023-02-21 | 2023-02-21 | Device and method for measuring three-dimensional static stiffness of numerically controlled lathe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116256132A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117309286A (en) * | 2023-11-28 | 2023-12-29 | 潍坊盛世汽车系统有限公司 | Rigidity detection device for numerical control horizontal servo tool rest |
-
2023
- 2023-02-21 CN CN202310146072.6A patent/CN116256132A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117309286A (en) * | 2023-11-28 | 2023-12-29 | 潍坊盛世汽车系统有限公司 | Rigidity detection device for numerical control horizontal servo tool rest |
| CN117309286B (en) * | 2023-11-28 | 2024-02-09 | 潍坊盛世汽车系统有限公司 | Rigidity detection device for numerical control horizontal servo tool rest |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107271122B (en) | Machining center three-direction static stiffness test system and test method | |
| CN116256132A (en) | Device and method for measuring three-dimensional static stiffness of numerically controlled lathe | |
| CN205426517U (en) | Lathe main shaft comprehensive properties detection / monitoring testing system | |
| CN108775842B (en) | Automobile wheel hub dynamic balance detects frock | |
| CN114770201A (en) | Worm engagement detection device, detection method and numerical control cyclone milling machine tool | |
| CN116907312B (en) | Spiral bevel gear clearance measurement tool | |
| CN204924122U (en) | Axle type part detection device | |
| CN116086703B (en) | Vertical full-automatic balancing machine of balance shaft | |
| CN210625623U (en) | Novel parallelism detector | |
| CN205808708U (en) | A kind of optical flat clamping for spindle rotation error test device adjusts structure | |
| CN209559171U (en) | A kind of brake rim inner hole detector | |
| CN217541818U (en) | Bearing protrusion measuring device | |
| CN109282721A (en) | Internal combustion engine cylinder body main bearing hole circle run-out detection tool and method | |
| CN112197666B (en) | Flexible detection tool for detecting automobile sheet metal part carrying auxiliary clamp | |
| CN211042553U (en) | Torque testing equipment | |
| CN210165852U (en) | Axle type work piece helix detection device | |
| CN113970280B (en) | Measuring method for grinding dimensional accuracy of machine tool guide rail | |
| CN111707461A (en) | Pretightening force detection device for high-speed motorized spindle | |
| CN216159802U (en) | Straightness and verticality detection device of numerical control lathe | |
| CN218847603U (en) | Fatigue strength's testing arrangement | |
| CN214537772U (en) | Non-contact sensor position adjusting structure of measuring shaft | |
| CN221223750U (en) | Positioning device of stepped hole concentricity detector | |
| CN114199567B (en) | Portable electric spindle comprehensive performance detection device | |
| CN221260391U (en) | Machine tool spindle thermal error detection device under simulated working condition load condition | |
| CN216706039U (en) | Round bearing bush fine boring machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |