CN108088602B - Testing device for blade tensioning state of inner circle slicing machine - Google Patents
Testing device for blade tensioning state of inner circle slicing machine Download PDFInfo
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- CN108088602B CN108088602B CN201810091674.5A CN201810091674A CN108088602B CN 108088602 B CN108088602 B CN 108088602B CN 201810091674 A CN201810091674 A CN 201810091674A CN 108088602 B CN108088602 B CN 108088602B
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- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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Abstract
The invention provides a testing device for the tension state of an inner circle slicer blade, which mainly comprises an electric push rod, an electromagnet, an encoder, a plurality of sensors and various connecting pieces. The electric push rod drives the center to press against the inner circular blade, the pressure sensor and the displacement sensor collect the pressure and deformation of the blade in real time, and the rigidity of the blade after tensioning can be obtained according to the relation between the pressure sensor and the displacement sensor; the computer controls the electromagnet to excite the inner circular blade, the displacement sensor collects vibration response data of the excited blade, and the natural frequency of the tensioned inner circular blade can be obtained through Fourier transformation; and rotating the cutter head of the inner circle slicing machine, measuring the lateral displacement of the blade edge by a displacement sensor, recording the rotating angle of the blade by an encoder, and taking the difference between the maximum value and the minimum value of the lateral displacement in each period as the unevenness of the tensioned inner circle blade edge. The device is convenient to assemble and flexible to operate, and can rapidly and accurately test the tensioning state of the blade of the inner circle slicing machine and judge the tensioning quality of the blade.
Description
Technical Field
The invention belongs to the field of inner circle blade testing, and particularly relates to a testing device for the tensioning state of an inner circle slicer blade.
Background
The hard and brittle material has the advantages of high hardness, wear resistance, corrosion resistance, good chemical stability and the like, and is widely applied to the industrial and civil fields. In practical production processes, cutting and slicing processes of hard and brittle materials such as magnetic materials, semiconductor silicon materials, ceramics, quartz, cemented carbide, and the like are very common. The inner circle slicing method based on the inner circle slicing machine has the advantages of relatively high cutting precision, uniform and stable slicing thickness, convenient adjustment of crystal orientation and thickness, flexible processing of multiple specifications and varieties, low cost of cutting auxiliary materials, small pollution of waste environment and the like, and is a main means for small-scale and small-batch slicing processing of the middle-small-size hard and brittle materials at present.
The thickness of the inner circular blade is extremely thin, and the thickness of the common blade is only 0.12mm, so that the blade needs to be treated to obtain larger rigidity before slicing, and the mechanical tensioning method is the most commonly used method for improving the rigidity of the inner circular blade at present. However, due to factors such as the too thin blade and improper pressure adjustment of the tension pressure ring, the blade edge is often caused to generate wave deformation, so that the problems of serious kerf cutting loss, poor slice surface quality and the like are caused. Therefore, the research on the tension characteristic of the blade of the inner circle slicing machine is of great significance to the development of slicing processing of hard and brittle materials.
Developing the research of the tensioning characteristics of the blade of the inner circle slicing machine, making different tensioning schemes, and testing the state of the tensioned inner circle blade to judge the tensioning quality of the blade. At present, a dial indicator is generally adopted to roughly measure the deformation condition of the cutting edge, but the uncertainty of factors such as the placement position of the dial indicator, manual reading parameters and the like can generate a large error, and the method can not measure other state parameters such as the rigidity of the cutting edge after the blade is tensioned, so that the method can not accurately judge the tensioning quality of the inner circle blade.
In summary, the development of the inner circle slicing technology is urgent to need a testing device, which can accurately and rapidly test the states of the blades under different tensioning schemes: blade edge unevenness, edge stiffness, and natural frequency. The design and development of a set of device for testing the tension state of the blade of the internal diameter slicer has important significance and practical application value.
Disclosure of Invention
The invention aims to provide a testing device for the state of an inner circle blade under different tensioning schemes, which can rapidly and accurately test the rigidity, the unevenness and the inherent frequency of the cutting edge of the tensioned blade of an inner circle slicer.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a testing device for the tension state of the blade of an inner circle slicing machine consists of a mechanical device and electrical equipment. The mechanical device comprises an L-shaped support frame, a Z-axis fine adjustment displacement lifting platform, an L-shaped connecting frame, a baffle plate, an electric push rod connecting column, a center, an encoder double-folded connecting frame, an encoder fixing frame, an encoder sleeve and the like; the electrical equipment comprises an eddy current displacement sensor, a laser displacement sensor, an encoder, a pressure sensor, an electromagnet, a relay, an electric push rod, a collection card, a computer, a direct current power supply and the like. The testing device is divided into three parts, namely rigidity, cutting edge unevenness and natural frequency testing.
The bottom of the L-shaped support frame is provided with two U-shaped grooves which are used for being connected with a movable working platform of the inner circle slicing machine through bolts; the side part is provided with three round through holes, four threaded holes and a square through hole, and is used for fixing the electric push rod and the L-shaped connecting frame of the laser displacement sensor.
One end of the electric push rod connecting column is provided with threads and is used for being connected with a push rod of the electric push rod; the other end is smooth, and the end face of the end is provided with a threaded hole for being connected with a threaded column at one end of the pressure sensor.
One end of the center is conical and is used for propping against the tensioned inner circular blade; the other end of the center is provided with a threaded hole for being connected with a pressure sensor threaded column.
One end of the encoder double-folded connecting frame is connected with the frame of the inner circle slicer, the other end of the encoder double-folded connecting frame is connected with the encoder fixing frame, the size of a through hole connected with the frame is larger than that of a bolt, and the length of the bolt is larger than that of a threaded hole of the frame, so that a buffer gap is reserved in each degree of freedom of the encoder connecting and fixing device for eliminating the jumping error of the main shaft during rotation, and the encoder and the main shaft of the inner circle slicer are flexibly connected.
The encoder sleeve is cylindrical in two sections, through holes with two diameters are formed in the encoder sleeve, one section with a large diameter is sleeved on a lock nut of a belt wheel at the back of a main shaft of the inner circle slicer, and the other section is sleeved on a rotating column of the encoder. The middle positions of the two sections of cylindrical side surfaces are provided with three threaded holes for propping up the locking bolt and the rotating column through the bolt, so that circumferential fixation is realized, and synchronous rotation of the encoder and the main shaft is ensured.
The invention has the advantages that: the tensioning state of the blade of the internal diameter slicer can be rapidly measured, and the tensioning quality of the blade can be judged. The tensioning state parameters of the inner circular blade which can be accurately tested by the device are as follows: stiffness, edge irregularities, and natural frequency. The whole device is modified based on the inner circle slicing machine, is convenient to process, assemble and disassemble, can quickly adjust all parts to proper positions through the inner circle slicing moving platform, and is simple and flexible in operation in the whole testing process. In addition, the device can also be used for rigidity testing of other thin disc-shaped parts, and has wide application range.
Drawings
FIG. 1 is a schematic view of the whole structure of the present invention
FIG. 2 is a schematic diagram of a blade stiffness testing apparatus
FIG. 3 is a schematic diagram of the installation of an eddy current displacement sensor and an electromagnet
FIG. 4 is a schematic diagram of an encoder mounting arrangement
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in fig. 1, the testing device for the tension state of the blade of the inner circle slicing machine comprises the following parts in sequence: the inner circle slicing machine moving operation platform (1), a bolt (2), an L-shaped supporting frame (3), an electric push rod stepping motor (4), a laser displacement sensor (5), a bolt (6), a laser displacement sensor connecting frame (7), a connecting frame bolt (8), a bolt (9), an electric push rod sleeve (10), an electric push rod telescopic rod (11), an electric push rod connecting column (12), a baffle plate (13), a pressure sensor (14), a positioning nut (15), a center (16), an eddy current displacement sensor measuring head (17), a fixing nut (18), an L-shaped connecting frame (19), a bolt (20), a gasket (21), an electromagnet (22), a Z-axis fine adjustment displacement lifting platform (23), an inner circle blade (24), a cutter disc (25), an inner circle slicing machine frame (26), an inner circle slicing machine main shaft (27), a frame bolt (28), an encoder double-folded connecting frame (29), a connecting frame bolt nut (30), an encoder (31), an encoder fixing bolt (32), an encoder fixing frame (33), a circumferential locking bolt (34), an encoder sleeve (35) and a belt wheel (36); other components such as computers, acquisition cards, dc regulated power supplies, relays, wires, etc. are not shown in the figures.
The part of the stiffness testing device for the inner circular blade in the invention is shown in fig. 2. The L-shaped supporting frame (3) is fixedly connected with the movable operating platform (1) of the inner circle slicing machine through bolts (2); four connecting frame bolts (8) penetrate through four bolt holes on the side part of the L-shaped support frame (3) of the laser displacement sensor connecting frame (7) to connect the connecting frame (7) and the support frame (3); four bolts (6) completely penetrate through the laser displacement sensor (5) and the laser displacement sensor connecting frame (7) and are screwed by nuts, so that the laser displacement sensor (5) and the connecting frame (7) are fixedly connected; the square positioning block at the back of the electric push rod sleeve (10) penetrates through the square through hole at the side part of the L-shaped support frame (3), and three bolts (9) penetrate through the L-shaped support frame (3) and are screwed on the electric push rod sleeve (10); one side of the electric push rod connecting column (12) is provided with threads and is connected with a threaded hole of the electric push rod telescopic rod (11), the end surface of the other side of the electric push rod connecting column (12) is provided with a threaded hole, the threaded column at one end of the pressure sensor (14) passes through the baffle plate (13) to be connected with the threaded hole, and the baffle plate (13) realizes axial positioning through a positioning nut; the threaded column at the other end of the pressure sensor (14) is connected with the center (16). So far, the rigidity testing device is partially installed.
The natural frequency testing device of the inner circular blade in the invention is partially shown in fig. 3. The Z-axis fine adjustment displacement lifting platform (23) can enable the magnet inside the Z-axis fine adjustment displacement lifting platform to be attracted and fixed with the inner circle slicer moving operation platform (1) by rotating the big knob on the front face, and the height of the Z-axis fine adjustment displacement lifting platform can be finely adjusted by the knob on the side face. The upper plane of the Z-axis fine adjustment displacement lifting platform (23) is connected with two L-shaped connecting frames (19) through bolts. The cylindrical surface of the measuring head (17) of the eddy current displacement sensor is in a thread shape, and the measuring head is locked by a pair of fixing nuts (18) after penetrating through the L-shaped connecting frame (19). A long bolt (20) passes through a gasket (21) with a larger outer diameter and the L-shaped connecting frame (19) and is screwed with an electromagnet (22) to finish the fixation of the electromagnet. Thus, the natural frequency testing device is partially installed.
The part of the inner circular blade cutting edge unevenness testing device needs an encoder to be matched with an eddy current displacement sensor for use. Fig. 4 is a schematic diagram of encoder installation, wherein the encoder (31) is connected with the encoder fixing frame (33) by the encoder fixing bolt (32), then the encoder fixing frame (33) is connected with the encoder double-folded connecting frame (29) by the connecting frame bolt and nut (30), and finally the encoder double-folded connecting frame (29) is connected with the inner circle slicer frame (26) by the frame bolt (28). Two through holes with diameters are formed in the encoder sleeve (35), one section with the larger diameter is sleeved on a lock nut (37) of a belt wheel at the back of a main shaft of the inner circular slicer, and the other section is sleeved on a rotating column of the encoder (31); six circumferential locking bolts (34) are respectively screwed into threaded holes at the side part of the encoder sleeve (35) and respectively push against a locking nut (37) and a rotating column of the encoder (31), so that circumferential fixation is realized, and synchronous rotation of the encoder and the main shaft is ensured. The same eddy current displacement sensor is used for the cutting edge unevenness test and the natural frequency test, and a measuring head (17) of the eddy current displacement sensor does not need to be reinstalled or adjusted. So far, the cutting edge unevenness testing device is partially installed.
The following describes the specific operation of the test device in this embodiment with reference to fig. 1:
the cutting edge rigidity of the inner circular blade (24) in a tensioning state is tested, and the position of a movable operating platform (1) of the inner circular slicing machine is required to be adjusted firstly, so that the axial distance between the center (16) and the cutting edge of the inner circular blade (24) is within 1mm when the electric push rod telescopic rod (11) is in a fully retracted state; then, the computer is used for controlling the stepping motor (4) of the electric push rod to work so as to enable the telescopic rod (11) of the electric push rod to slowly extend step by step, and the tip (16) connected with the rod end is used for pressing down the cutting edge of the inner circular blade (24) and deforming the cutting edge; the pressure born by the cutting edge of the inner circular blade (24) is transmitted to the pressure sensor (14) through the center (16), so that the pressure value measured by the pressure sensor (14) in real time is the pressure born by the cutting edge of the inner circular blade (24); the laser of the laser displacement sensor (5) irradiates on a baffle (13) on the electric push rod to measure the displacement of the electric push rod in real time, and the displacement value is also the deformation pressing-down amount of the cutting edge of the inner circular blade (24); the data acquired by the sensor is transmitted to the computer through the acquisition card; finally, according to the relation that the rigidity is equal to the pressure divided by the deformation, and the acquired data is processed by computer software, the rigidity value of the cutting edge of the inner circular blade (24) can be obtained.
When the natural frequency of the inner circular blade (24) is tested, the positions of the electromagnet (22) and the measuring head (17) of the eddy current displacement sensor are firstly adjusted, so that the sucker of the electromagnet (22) is about 1mm away from the blade, and the measuring head (17) of the eddy current displacement sensor is as close to the electromagnet (22) as possible; the computer controls the relay to supply power to the electromagnet (22) for a short time through the acquisition card, so that the electromagnet generates pulse excitation to the inner circular blade (24); the measuring head (17) of the eddy current displacement sensor collects free vibration response data of the inner circular blade (24) after being excited by the electromagnet in real time; inputting the acquired data to a computer through an acquisition card; finally, the acquired data is processed by a Fourier transform method and the like, so that the natural frequency of the inner circular blade (24) can be obtained.
The blade unevenness of the inner circular blade (24) refers to the range of lateral displacement variation at the edge of the tensioned inner circular blade. During testing, the position of the Z-axis fine adjustment displacement lifting platform (23) is firstly adjusted, so that the axial distance between the measuring head (17) of the eddy current displacement sensor and the cutting edge of the inner circular blade (24) is about 1mm, and the specific distance is determined according to the measuring range of the sensor; then, a cutter head (25) of the inner circle slicing machine is rotated to drive the tensioned inner circle blade (24) to rotate at a low speed; the measuring head (17) of the eddy current displacement sensor measures the lateral displacement of the inner ring cutting edge of the inner ring blade (24) in real time, and the encoder (31) records the rotated angular displacement of the inner ring blade (24) in real time; the data acquired by the sensor is input into a computer through the acquisition card; finally, the acquired data are processed, and the cutting edge unevenness of the inner circular blade (24) can be obtained.
Claims (4)
1. The testing device for the tension state of the blade of the inner circle slicer mainly comprises an L-shaped supporting frame (3), a laser displacement sensor (5), a laser displacement sensor connecting frame (7), an electric push rod telescopic rod (11), an electric push rod connecting column (12), a baffle (13), a pressure sensor (14), a positioning nut (15), a center (16), an eddy current displacement sensor measuring head (17), an L-shaped connecting frame (19), an electromagnet (22), a Z-axis fine adjustment displacement lifting platform (23), an inner circle blade (24), an inner circle slicer rack (26), a rack bolt (28), an encoder double-folded connecting frame (29), an encoder (31), an encoder fixing frame (33), a circumferential locking bolt (34) and an encoder sleeve (35);
the L-shaped support frame (3) is connected with the movable platform of the inner circle slicing machine through bolts, the laser displacement sensor (5) is connected with the L-shaped support frame (3) through a laser displacement sensor connecting frame (7), the electric push rod is connected with the L-shaped support frame (3) through bolts, one side of the electric push rod connecting column (12) is threaded and is connected with a threaded hole of the electric push rod telescopic rod (11), the end face of the other side of the electric push rod connecting column is provided with a threaded hole, a threaded column at one end of the pressure sensor (14) penetrates through the baffle (13) and is connected with the threaded hole, a threaded column at the other end of the pressure sensor is connected with the center (16), and the baffle (13) and the center (16) are axially positioned through the positioning nut (15);
the Z-axis fine adjustment displacement lifting platform (23) is connected with the movable operation platform of the inner circle slicing machine through an internal magnet, the two L-shaped connecting frames (19) are connected with the Z-axis fine adjustment displacement lifting platform (23) through bolts, the electric vortex displacement sensor measuring head (17) and the electromagnet (22) are respectively connected with the L-shaped connecting frames (19) through double nuts and bolts, and the positions of the electric vortex displacement sensor measuring head (17) and the electromagnet (22) sucking discs are adjusted to be about 1mm away from the inner circle blade (24);
the encoder (31) is connected with the encoder fixing frame (33) through bolts, the encoder fixing frame (33) is connected with the encoder double-folded connecting frame (29) through bolts and nuts, the encoder double-folded connecting frame (29) is connected with the inner circle slicer rack (26) through rack bolts (28), two through holes with different diameters are formed in the encoder sleeve (35), one section with the large diameter is sleeved on a lock nut of a belt wheel at the back of a main shaft of the inner circle slicer, the other section is sleeved on a rotating column of the encoder (31), six circumferential locking bolts (34) are screwed into threaded holes at the side parts of the encoder sleeve (35) respectively, and the lock nut (37) and the rotating column of the encoder (31) are propped up respectively, so that circumferential fixation is achieved, and synchronous rotation of the encoder and the main shaft is ensured.
2. The device for testing the tension of an inner diameter slicer blade according to claim 1, wherein: when the intelligent electric knife blade is in operation, the computer controls the electric push rod telescopic rod (11) to extend out, the center (16) is driven to press the inner circular knife blade, the pressure sensor (14) and the laser displacement sensor (5) respectively measure the pressure and deformation of the knife blade in real time, collected data are transmitted to the computer through the collecting card, and the rigidity value of the cutting edge of the inner circular knife blade (24) can be obtained according to the relation that the rigidity is equal to the pressure divided by the deformation.
3. The device for testing the tension of an inner diameter slicer blade according to claim 1, wherein: when the intelligent electromagnetic knife is in operation, the computer controls the relay to supply power to the electromagnet (22) for a short time through the acquisition card, so that pulse excitation is generated on the inner circular knife blade (24), the eddy current displacement sensor measuring head (17) acquires free vibration response data of the inner circular knife blade (24) after being excited by the electromagnet in real time, the acquired data is input into the computer through the acquisition card, and the acquired data is processed by utilizing the Fourier transformation method, so that the natural frequency of the inner circular knife blade (24) can be obtained.
4. The device for testing the tension of an inner diameter slicer blade according to claim 1, wherein: during operation, the cutter head of the inner circle slicing machine is rotated, the cutter head drives the tensioned inner circle blade (24) to rotate at a low speed, the eddy current displacement sensor measuring head (17) measures the lateral displacement of the inner circle cutting edge of the inner circle blade (24) in real time, the encoder (31) records the angular displacement of the inner circle blade (24) in real time, data acquired by the sensor are input into a computer through the acquisition card, and finally the maximum and minimum lateral displacement difference value in each period is obtained, so that the cutting edge unevenness of the inner circle blade (24) can be obtained.
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