CN210427264U - Friction experiment device for testing friction performance of cutter coating - Google Patents
Friction experiment device for testing friction performance of cutter coating Download PDFInfo
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- CN210427264U CN210427264U CN201920823202.4U CN201920823202U CN210427264U CN 210427264 U CN210427264 U CN 210427264U CN 201920823202 U CN201920823202 U CN 201920823202U CN 210427264 U CN210427264 U CN 210427264U
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- 238000012360 testing method Methods 0.000 title claims abstract description 21
- 238000002474 experimental method Methods 0.000 title claims abstract description 20
- 239000011248 coating agent Substances 0.000 title claims abstract description 19
- 238000000576 coating method Methods 0.000 title claims abstract description 19
- 230000007246 mechanism Effects 0.000 claims abstract description 65
- 238000005520 cutting process Methods 0.000 claims abstract description 46
- 230000001105 regulatory effect Effects 0.000 claims abstract description 25
- 230000009471 action Effects 0.000 claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 230000001276 controlling effect Effects 0.000 claims description 9
- 238000011056 performance test Methods 0.000 claims description 8
- 238000003860 storage Methods 0.000 claims description 3
- 238000003754 machining Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000005457 optimization Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The utility model relates to a friction and wear test technical field is a friction experiment device who is used for cutter coating friction performance to test very much. The utility model comprises a rotary fixing mechanism, a cutting mechanism, a feeding action mechanism, a friction mechanism, a data acquisition mechanism and a pressure regulating mechanism; the rotary fixing mechanism comprises a three-jaw chuck, a first driving device for driving the three-jaw chuck to rotate circumferentially, and a columnar workpiece which is fixedly arranged on the three-jaw chuck and used for a friction experiment; the cutting mechanism comprises a base, a cutting base, a turret tool rest arranged on the cutting base and a cutter arranged on the turret tool rest, wherein the cutter is positioned beside the columnar workpiece. The utility model discloses can have longer test time again when guaranteeing to have sufficient contact pressure.
Description
Technical Field
The utility model relates to a friction and wear test technical field is a friction experiment device who is used for cutter coating friction performance to test very much.
Background
In the background of global competition, in order to improve the production machining efficiency, the machining of the tool in the industry generally adopts very high cutting speed, and under the harsh machining conditions of high cutting state, extremely high mechanical stress and temperature are generated around the chip interface and the cutting edge of the tool, so that the tool is excessively worn and even prematurely fails in the production machining process, and finally the rejection rate is excessively high. Therefore, to prevent this from happening, it is necessary to establish an accurate simulation of the cutting process, determining the optimum cutting conditions in terms of tool material, tool geometry and coating, etc., so as to maintain a high productivity of the machining operation, thereby reducing the rejection rate.
In order to study the tribological phenomena occurring at the machining interface, i.e. the mechanical stress problem and the temperature problem, one of the methods studied by researchers is through laboratory simulation tests, and several friction devices have been or have been developed. The most widely known device is the pin-disc system, such as the small pin-disc contact reciprocating frictional wear test device disclosed in chinese patent No. 201810287951X, which unfortunately cannot simulate the frictional contact conditions during cutting because the friction surfaces during cutting are newly formed surfaces due to the continuous repeated friction of the pins and the disc in the experimental method, and thus the frictional conditions (initial profile of the frictional surfaces, temperature, pressure) simulated by using the pin-disc system are not consistent with the actual conditions of cutting, and thus cannot simulate the frictional conditions during cutting very well. Furthermore, the contact pressure allowed using these systems is not suitable for heavy duty friction testing because of the lack of rigid contact, the contact point pressure is difficult to reach 1 GPa.
In order to better simulate the experimental conditions of tool cutting friction, the skilled person will have further explored, for example, Olsson et al propose placing a pin behind the cutting tool, the friction sliding speed and contact temperature occurring similarly in dry processing, but the contact pressure is still low (about 15 MPa). The higher contact pressures (up to 3 GPa) simulated at high sliding speeds (up to 400 m/min) as designed by Zemzemi et al show that it provides a high efficiency of the associated coefficient of friction, however, the device of its invention is very difficult to manage and the work piece is very long and expensive to manufacture. Furthermore, the duration of the rubbing of the device is very limited (about 10 seconds) and long wear tests cannot be carried out. Hedenqvist et al propose a device with cylindrical geometry for rubbing a pin against a rotating surface, which can produce sufficient speed (hundreds of meters per minute) and can be tested for long periods of time, but which does not provide sufficient local pressure (about 15 MPa) to simulate the tribological phenomena occurring during machining.
It can be seen that there is no prior art device that provides sufficient contact pressure while having a long test time for testing the cutting friction of the tool.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: the friction experiment device for the friction performance test of the cutter coating is provided, and can ensure enough contact pressure and have longer test time.
The utility model discloses a following technical scheme realizes: the utility model provides a friction experiment device for cutter coating friction performance test which characterized in that: the device comprises a rotary fixing mechanism, a cutting mechanism, a feeding action mechanism, a friction mechanism, a data acquisition mechanism and a pressure regulating mechanism;
the rotary fixing mechanism comprises a three-jaw chuck, a first driving device for driving the three-jaw chuck to rotate circumferentially, and a columnar workpiece which is fixedly arranged on the three-jaw chuck and used for a friction experiment;
the cutting mechanism comprises a base, a cutting base, a turret tool rest arranged on the cutting base and a cutter arranged on the turret tool rest, and the cutter is positioned beside the columnar workpiece; the base is provided with a sliding rail extending towards one side of the columnar workpiece, the cutting base is movably arranged on the sliding rail, and a locking device for directly locking or unlocking the cutting base and the sliding rail is arranged between the cutting base and the sliding rail;
the pressure regulating mechanism is positioned on one side of the columnar workpiece, which is opposite to the cutting mechanism, and comprises a pressure regulating base, a push block arranged on the pressure regulating base and a pushing device which is arranged on the pressure regulating base and used for pushing the push block to move towards one side of the columnar workpiece so as to apply load to the columnar workpiece;
the friction mechanism comprises a friction pin with the front part resisting against the side surface of the columnar workpiece and a clamping seat for clamping the friction pin, and the top end of the friction pin is coated with a cutter coating to be tested;
the data acquisition mechanism comprises a dynamometer for testing the contact pressure between the friction pin and the columnar workpiece, a temperature sensor arranged on the friction pin and used for measuring the friction temperature, an analog-to-digital conversion module which is respectively and electrically connected with the dynamometer and the temperature sensor and used for performing analog-to-digital signal conversion, and a storage module which is electrically connected with the analog-to-digital conversion module and used for storing test data; the clamping seat is arranged on the push block through a dynamometer;
the feeding action mechanism comprises a first feeding device for controlling the base to feed along the length direction of the columnar workpiece, a second feeding device for controlling the pressure regulating base to feed along the length direction of the columnar workpiece, a second driving motor for driving the first feeding device and the second feeding device to act, and a transmission device arranged between the second driving motor and the first feeding device and between the second driving motor and the second feeding device and used for controlling the first feeding device and the second feeding device to synchronously feed.
The working principle and the process are as follows:
before the friction test, driving a turret tool rest to enable a cutter to be aligned to a columnar workpiece, and adjusting the relative position between the cutter and the columnar workpiece by adjusting the position of a cutting base so as to determine the depth of the cutter for cutting the workpiece; and driving the pushing device to observe the pressure value displayed by the dynamometer and adjust the pressure between the friction pin and the columnar workpiece according to the displayed pressure value. And then, switching on a power supply, and setting the rotating speeds of the first driving motor and the second driving motor so as to respectively determine the rotating speed of the columnar workpiece and the feeding speed of the cutter.
For better implementation of the scheme, the following optimization scheme is also provided:
furthermore, the first driving device comprises a first driving motor and a first belt transmission mechanism which is arranged between an output shaft of the first driving motor and the three-jaw chuck and used for driving the three-jaw chuck to rotate along the central shaft.
Furthermore, the first feeding device comprises a first screw hole which is arranged on the base and extends along the feeding direction of the columnar workpiece, and a first screw rod which is in threaded connection with the first screw hole; the second feeding device comprises a second screw hole and a second screw rod, wherein the second screw hole is arranged on the pressure regulating base and extends along the feeding direction of the columnar workpiece, and the second screw rod is in threaded connection with the second screw hole;
the transmission device comprises a second belt transmission mechanism which is arranged between an output shaft of the second driving motor and the first screw rod and used for driving the first screw rod to rotate, and a third belt transmission mechanism which is arranged between the output shaft of the second driving motor and the second screw rod and used for driving the second screw rod to rotate.
Preferably, the temperature sensor is a thermocouple.
Further, the front end of the friction pin is shaped as a hemisphere protruding outward.
Preferably, the locking device is a slack adjuster bolt.
Compared with the prior art, the utility model has the advantages that:
1. the cutting unit and the friction unit of the utility model adopt a combined shape that the cutter is arranged in front of the friction unit and the friction pair is arranged in back of the friction unit, and the first motor drives the three-jaw chuck to rotate so as to drive the columnar workpiece to rotate; the other second motor drives the cutter and the friction pin to feed simultaneously, the cutter advances in the motion direction of the friction pin all the time and keeps a constant distance between the cutter and the friction pin, and after the cutter continuously cuts a workpiece to form a new forming surface, the new forming surface is in contact friction with the friction pin, so that the initial condition of a friction pair is kept constant in different friction practices;
2. the utility model discloses the initial friction pressure of device can realize real-time regulation through adjusting the pneumatic cylinder, through the dynamometer of signal acquisition unit, can show initial friction pressure and the friction pressure in the friction process, measures the temperature in the friction process through the thermocouple of fixing on friction round pin surface to realized the measurement to friction pressure and temperature in the middle of the measurement process;
3. the utility model discloses a column work piece has great rigidity as the friction lever, non-deformable under great load to realize heavy load friction experiment, this experimental apparatus creatively has adopted round pin-excellent mode, and hemispherical structure is adopted on friction round pin top, and hemispherical surface is used for coating the examination cutter coating that awaits measuring, and spherical friction is vice to be favorable to realizing the mechanics experiment under the heavy load, and friction round pin surface coating is removable, and the friction round pin can repetitious usage.
4. Among the friction unit, the size of friction round pin is adjustable, through the size of adjusting the friction round pin and change the vice radius of spherical friction, satisfy different friction pressure.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic structural view of the rotary fixing mechanism of the present invention;
FIG. 3 is a schematic view of the cutting mechanism of the present invention;
FIG. 4 is a schematic structural view of the pressure regulating mechanism of the present invention;
fig. 5 is a schematic structural view of the friction mechanism of the present invention;
fig. 6 is a schematic structural diagram of the data acquisition mechanism of the present invention;
fig. 7 is a circuit connection block diagram of the data acquisition mechanism of the present invention;
fig. 8 is a schematic structural view of the feed mechanism of the present invention.
Description of reference numerals: 11-three-jaw chuck 121-first drive motor 122-first belt transmission mechanism
13-columnar workpiece 21-base 211-slide rail
22-cutting base 23-turret 24-tool
25-tightness adjusting bolt 31-pressure adjusting base 32-push block
33-hydraulic cylinder 41-friction pin 42-clamping seat
51-dynamometer 611-first screw hole 612-first screw rod
621-second screw hole 622-second screw rod 63-second driving motor
642-second Belt Transmission 643-third Belt Transmission
Detailed Description
The invention is explained in detail below with reference to the accompanying drawings:
as shown in fig. 1, the present invention includes a rotary fixing mechanism for providing rotary power to the cylindrical workpiece 13, a cutting mechanism for cutting the surface of the cylindrical workpiece 13, a pressure regulating mechanism for providing and regulating experimental pressure, a friction mechanism for friction experiment, a data collecting mechanism for data collection and analysis, and a feeding mechanism for providing relative feeding motion of the cylindrical workpiece 13;
as shown in fig. 2, the rotary fixing mechanism includes a three-jaw chuck 11, a first driving device for driving the three-jaw chuck 11 to rotate circumferentially, and a columnar workpiece 13 fixedly mounted on the three-jaw chuck 11 and used for a friction experiment; the first driving device comprises a first driving motor 121 and a first belt transmission mechanism 122 which is arranged between an output shaft of the first driving motor 121 and the three-jaw chuck 11 and is used for driving the three-jaw chuck 11 to rotate along a central shaft.
As shown in fig. 3, the cutting mechanism and the friction mechanism are combined in a mode that the tool 24 is arranged in front and the friction pair, namely the friction pin 41 is arranged in back, the cutting mechanism comprises a base 21, a cutting base 22, a turret tool rest 23 arranged on the cutting base 22 and the tool 24 arranged on the turret tool rest 23, and the tool 24 is arranged at the side of the columnar workpiece 13; the base 21 is provided with a slide rail 211 extending to one side of the columnar workpiece 13, the cutting base 22 is movably arranged on the slide rail 211, a locking device for directly locking or unlocking the cutting base 22 and the slide rail 211 is arranged between the two, and the locking device is an elastic adjusting bolt 25.
As shown in fig. 4, the pressure regulating mechanism is located on one side of the columnar workpiece 13 opposite to the cutting mechanism, and the pressure regulating mechanism includes a pressure regulating base 31, a pushing block 32 arranged on the pressure regulating base 31, and a pushing device which is installed on the pressure regulating base 31 and used for pushing the pushing block 32 to move towards one side of the columnar workpiece 13 so as to apply a load to the columnar workpiece 13, and the pushing device of this embodiment adopts a hydraulic cylinder 33;
as shown in fig. 5, the friction mechanism includes a friction pin 41 whose front portion abuts against the side surface of the cylindrical workpiece 13, and a holder 42 for holding the friction pin 41, the tip of the friction pin 41 is coated with the coating of the tool 24 to be tested, and the front end portion of the friction pin 41 has a hemispherical shape which is convex outward.
As shown in fig. 6 to 7, (for convenience of drawing, the rest of the structure is not shown in fig. 6 except the load cell), the data acquisition mechanism includes a load cell 51 for testing the contact pressure between the friction pin 41 and the columnar workpiece 13, a temperature sensor disposed on the friction pin 41 for measuring the friction temperature, an analog-to-digital conversion module electrically connected to the load cell 51 and the temperature sensor respectively for performing analog-to-digital signal conversion, and a storage module electrically connected to the analog-to-digital conversion module for storing test data, the temperature sensor being a thermocouple; the clamping seat 42 is arranged on the push block 32 through a dynamometer 51;
as shown in fig. 8, the feeding action mechanism includes a first feeding device for controlling the feeding action of the base 21 along the length direction of the columnar workpiece 13, a second feeding device for controlling the feeding action of the pressure regulating base 31 along the length direction of the columnar workpiece 13, a second driving motor 63 for driving the first feeding device and the second feeding device to act, and a transmission device arranged between the second driving motor 63 and the first feeding device and the second feeding device for controlling the synchronous feeding of the first feeding device and the second feeding device. The first feeding means includes a first screw hole 611 provided on the base 21 and extending in the feeding direction of the columnar workpiece 13, and a first screw rod 612 screw-coupled to the first screw hole 611; the second feeding device comprises a second screw hole 621 which is arranged on the pressure regulating base 31 and extends along the feeding direction of the columnar workpiece 13, and a second screw rod 622 which is in threaded connection with the second screw hole 621;
the transmission device includes a second belt transmission 642 disposed between the output shaft of the second driving motor 63 and the first lead screw 612 and used for driving the first lead screw 612 to rotate, and a third belt transmission 643 disposed between the output shaft of the second driving motor 641 and the second lead screw 622 and used for driving the second lead screw 622 to rotate.
While the present invention has been shown and described with reference to particular embodiments and alternatives thereof, it will be understood that various changes and modifications can be made without departing from the spirit and scope of the invention. It is understood, therefore, that the invention is not to be limited, except as by the appended claims and their equivalents.
Claims (6)
1. The utility model provides a friction experiment device for cutter coating friction performance test which characterized in that: the device comprises a rotary fixing mechanism, a cutting mechanism, a feeding action mechanism, a friction mechanism, a data acquisition mechanism and a pressure regulating mechanism;
the rotary fixing mechanism comprises a three-jaw chuck (11), a first driving device for driving the three-jaw chuck (11) to rotate circumferentially, and a columnar workpiece (13) which is fixedly arranged on the three-jaw chuck (11) and used for a friction experiment;
the cutting mechanism comprises a base (21), a cutting base (22), a turret tool rest (23) arranged on the cutting base (22) and a cutter (24) arranged on the turret tool rest (23), wherein the cutter (24) is positioned at the side of the columnar workpiece (13); a sliding rail (211) extending towards one side of the columnar workpiece (13) is arranged on the base (21), the cutting base (22) is movably arranged on the sliding rail (211), and a locking device for directly locking or unlocking the cutting base (22) and the sliding rail (211) is arranged between the cutting base (22) and the sliding rail (211);
the pressure regulating mechanism is positioned on one side of the columnar workpiece (13) opposite to the cutting mechanism, and comprises a pressure regulating base (31), a push block (32) arranged on the pressure regulating base (31) and a pushing device which is arranged on the pressure regulating base (31) and used for pushing the push block (32) to move towards one side of the columnar workpiece (13) so as to apply load to the columnar workpiece (13);
the friction mechanism comprises a friction pin (41) with the front part resisting against the side surface of the columnar workpiece (13) and a clamping seat (42) for clamping the friction pin (41), wherein the top end of the friction pin (41) is coated with a coating of a tool (24) to be tested;
the data acquisition mechanism comprises a dynamometer (51) for testing the contact pressure between the friction pin (41) and the columnar workpiece (13), a temperature sensor arranged on the friction pin (41) and used for measuring the friction temperature, an analog-to-digital conversion module which is respectively electrically connected with the dynamometer (51) and the temperature sensor and used for performing analog-to-digital signal conversion, and a storage module which is electrically connected with the analog-to-digital conversion module and used for storing test data; the clamping seat (42) is arranged on the push block (32) through a dynamometer (51);
the feeding action mechanism comprises a first feeding device for controlling the base (21) to perform feeding action along the length direction of the columnar workpiece (13), a second feeding device for controlling the pressure regulating base (31) to perform feeding action along the length direction of the columnar workpiece (13), a second driving motor (63) for driving the first feeding device and the second feeding device to act, and a transmission device which is arranged between the second driving motor (63) and the first feeding device and the second feeding device and is used for controlling the first feeding device and the second feeding device to synchronously feed.
2. The friction experiment device for the friction performance test of the cutter coating according to claim 1, characterized in that: the first driving device comprises a first driving motor (121) and a first belt transmission mechanism (122) which is arranged between an output shaft of the first driving motor (121) and the three-jaw chuck (11) and used for driving the three-jaw chuck (11) to rotate along a central shaft.
3. The friction experiment device for the friction performance test of the cutter coating according to claim 1, characterized in that: the first feeding device comprises a first screw hole (611) which is arranged on the base (21) and extends along the feeding direction of the columnar workpiece (13), and a first screw rod (612) which is in threaded connection with the first screw hole (611); the second feeding device comprises a second screw hole (621) which is arranged on the pressure regulating base (31) and extends along the feeding direction of the columnar workpiece (13), and a second screw rod (622) which is in threaded connection with the second screw hole (621);
the transmission device comprises a second belt transmission mechanism (642) which is arranged between an output shaft of the second driving motor (63) and the first screw rod (612) and is used for driving the first screw rod (612) to rotate, and a third belt transmission mechanism (643) which is arranged between the output shaft of the second driving motor (63) and the second screw rod (622) and is used for driving the second screw rod (622) to rotate.
4. The friction experiment device for the friction performance test of the cutter coating according to claim 1, characterized in that: the temperature sensor is a thermocouple.
5. The friction experiment device for the friction performance test of the cutter coating according to claim 1, characterized in that: the front end of the friction pin (41) is shaped as a hemisphere protruding outward.
6. The friction experiment device for the friction performance test of the cutter coating according to claim 1, characterized in that: the locking device is an elastic adjusting bolt (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920823202.4U CN210427264U (en) | 2019-05-31 | 2019-05-31 | Friction experiment device for testing friction performance of cutter coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920823202.4U CN210427264U (en) | 2019-05-31 | 2019-05-31 | Friction experiment device for testing friction performance of cutter coating |
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| Publication Number | Publication Date |
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| CN210427264U true CN210427264U (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920823202.4U Withdrawn - After Issue CN210427264U (en) | 2019-05-31 | 2019-05-31 | Friction experiment device for testing friction performance of cutter coating |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082242A (en) * | 2019-05-31 | 2019-08-02 | 青岛理工大学 | A kind of frictional experiment device for the test of cutter coat frictional behaviour |
-
2019
- 2019-05-31 CN CN201920823202.4U patent/CN210427264U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082242A (en) * | 2019-05-31 | 2019-08-02 | 青岛理工大学 | A kind of frictional experiment device for the test of cutter coat frictional behaviour |
| CN110082242B (en) * | 2019-05-31 | 2024-01-09 | 青岛理工大学 | Friction experiment device for testing friction performance of cutter coating |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200428 Effective date of abandoning: 20240109 |